From 29b3e65ba0352986f791577bff0758ff6b6716f3 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 8 Oct 2023 10:18:06 -0700 Subject: [PATCH 001/146] more triple madness --- build/config.guess | 1745 +++++++++++++++++++++++++------------------- build/config.mk | 2 +- lib/triple.js | 11 +- 3 files changed, 1007 insertions(+), 751 deletions(-) diff --git a/build/config.guess b/build/config.guess index b79252d6..cdfc4392 100755 --- a/build/config.guess +++ b/build/config.guess @@ -1,12 +1,14 @@ #! /bin/sh # Attempt to guess a canonical system name. -# Copyright 1992-2013 Free Software Foundation, Inc. +# Copyright 1992-2023 Free Software Foundation, Inc. -timestamp='2013-06-10' +# shellcheck disable=SC2006,SC2268 # see below for rationale + +timestamp='2023-08-22' # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3 of the License, or +# the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, but @@ -15,7 +17,7 @@ timestamp='2013-06-10' # General Public License for more details. # # You should have received a copy of the GNU General Public License -# along with this program; if not, see . +# along with this program; if not, see . # # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a @@ -24,12 +26,20 @@ timestamp='2013-06-10' # program. This Exception is an additional permission under section 7 # of the GNU General Public License, version 3 ("GPLv3"). # -# Originally written by Per Bothner. +# Originally written by Per Bothner; maintained since 2000 by Ben Elliston. # # You can get the latest version of this script from: -# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD +# https://git.savannah.gnu.org/cgit/config.git/plain/config.guess # -# Please send patches with a ChangeLog entry to config-patches@gnu.org. +# Please send patches to . + + +# The "shellcheck disable" line above the timestamp inhibits complaints +# about features and limitations of the classic Bourne shell that were +# superseded or lifted in POSIX. However, this script identifies a wide +# variety of pre-POSIX systems that do not have POSIX shells at all, and +# even some reasonably current systems (Solaris 10 as case-in-point) still +# have a pre-POSIX /bin/sh. me=`echo "$0" | sed -e 's,.*/,,'` @@ -37,9 +47,9 @@ me=`echo "$0" | sed -e 's,.*/,,'` usage="\ Usage: $0 [OPTION] -Output the configuration name of the system \`$me' is run on. +Output the configuration name of the system '$me' is run on. -Operation modes: +Options: -h, --help print this help, then exit -t, --time-stamp print date of last modification, then exit -v, --version print version number, then exit @@ -50,13 +60,13 @@ version="\ GNU config.guess ($timestamp) Originally written by Per Bothner. -Copyright 1992-2013 Free Software Foundation, Inc. +Copyright 1992-2023 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." help=" -Try \`$me --help' for more information." +Try '$me --help' for more information." # Parse command line while test $# -gt 0 ; do @@ -84,78 +94,107 @@ if test $# != 0; then exit 1 fi -trap 'exit 1' 1 2 15 +# Just in case it came from the environment. +GUESS= # CC_FOR_BUILD -- compiler used by this script. Note that the use of a # compiler to aid in system detection is discouraged as it requires # temporary files to be created and, as you can see below, it is a # headache to deal with in a portable fashion. -# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still -# use `HOST_CC' if defined, but it is deprecated. +# Historically, 'CC_FOR_BUILD' used to be named 'HOST_CC'. We still +# use 'HOST_CC' if defined, but it is deprecated. # Portable tmp directory creation inspired by the Autoconf team. -set_cc_for_build=' -trap "exitcode=\$?; (rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null) && exit \$exitcode" 0 ; -trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ; -: ${TMPDIR=/tmp} ; - { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } || - { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir $tmp) ; } || - { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir $tmp) && echo "Warning: creating insecure temp directory" >&2 ; } || - { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } ; -dummy=$tmp/dummy ; -tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ; -case $CC_FOR_BUILD,$HOST_CC,$CC in - ,,) echo "int x;" > $dummy.c ; - for c in cc gcc c89 c99 ; do - if ($c -c -o $dummy.o $dummy.c) >/dev/null 2>&1 ; then - CC_FOR_BUILD="$c"; break ; - fi ; - done ; - if test x"$CC_FOR_BUILD" = x ; then - CC_FOR_BUILD=no_compiler_found ; - fi - ;; - ,,*) CC_FOR_BUILD=$CC ;; - ,*,*) CC_FOR_BUILD=$HOST_CC ;; -esac ; set_cc_for_build= ;' +tmp= +# shellcheck disable=SC2172 +trap 'test -z "$tmp" || rm -fr "$tmp"' 0 1 2 13 15 + +set_cc_for_build() { + # prevent multiple calls if $tmp is already set + test "$tmp" && return 0 + : "${TMPDIR=/tmp}" + # shellcheck disable=SC2039,SC3028 + { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } || + { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir "$tmp" 2>/dev/null) ; } || + { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir "$tmp" 2>/dev/null) && echo "Warning: creating insecure temp directory" >&2 ; } || + { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } + dummy=$tmp/dummy + case ${CC_FOR_BUILD-},${HOST_CC-},${CC-} in + ,,) echo "int x;" > "$dummy.c" + for driver in cc gcc c89 c99 ; do + if ($driver -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then + CC_FOR_BUILD=$driver + break + fi + done + if test x"$CC_FOR_BUILD" = x ; then + CC_FOR_BUILD=no_compiler_found + fi + ;; + ,,*) CC_FOR_BUILD=$CC ;; + ,*,*) CC_FOR_BUILD=$HOST_CC ;; + esac +} # This is needed to find uname on a Pyramid OSx when run in the BSD universe. # (ghazi@noc.rutgers.edu 1994-08-24) -if (test -f /.attbin/uname) >/dev/null 2>&1 ; then +if test -f /.attbin/uname ; then PATH=$PATH:/.attbin ; export PATH fi UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown -UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown +UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown -case "${UNAME_SYSTEM}" in +case $UNAME_SYSTEM in Linux|GNU|GNU/*) - # If the system lacks a compiler, then just pick glibc. - # We could probably try harder. - LIBC=gnu + LIBC=unknown - eval $set_cc_for_build - cat <<-EOF > $dummy.c + set_cc_for_build + cat <<-EOF > "$dummy.c" + #if defined(__ANDROID__) + LIBC=android + #else #include #if defined(__UCLIBC__) LIBC=uclibc #elif defined(__dietlibc__) LIBC=dietlibc - #else + #elif defined(__GLIBC__) LIBC=gnu + #else + #include + /* First heuristic to detect musl libc. */ + #ifdef __DEFINED_va_list + LIBC=musl + #endif + #endif #endif EOF - eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'` + cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'` + eval "$cc_set_libc" + + # Second heuristic to detect musl libc. + if [ "$LIBC" = unknown ] && + command -v ldd >/dev/null && + ldd --version 2>&1 | grep -q ^musl; then + LIBC=musl + fi + + # If the system lacks a compiler, then just pick glibc. + # We could probably try harder. + if [ "$LIBC" = unknown ]; then + LIBC=gnu + fi ;; esac # Note: order is significant - the case branches are not exclusive. -case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in +case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in *:NetBSD:*:*) # NetBSD (nbsd) targets should (where applicable) match one or # more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*, @@ -167,22 +206,32 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in # # Note: NetBSD doesn't particularly care about the vendor # portion of the name. We always set it to "unknown". - sysctl="sysctl -n hw.machine_arch" - UNAME_MACHINE_ARCH=`(/sbin/$sysctl 2>/dev/null || \ - /usr/sbin/$sysctl 2>/dev/null || echo unknown)` - case "${UNAME_MACHINE_ARCH}" in + UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \ + /sbin/sysctl -n hw.machine_arch 2>/dev/null || \ + /usr/sbin/sysctl -n hw.machine_arch 2>/dev/null || \ + echo unknown)` + case $UNAME_MACHINE_ARCH in + aarch64eb) machine=aarch64_be-unknown ;; armeb) machine=armeb-unknown ;; arm*) machine=arm-unknown ;; sh3el) machine=shl-unknown ;; sh3eb) machine=sh-unknown ;; sh5el) machine=sh5le-unknown ;; - *) machine=${UNAME_MACHINE_ARCH}-unknown ;; + earmv*) + arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'` + endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'` + machine=${arch}${endian}-unknown + ;; + *) machine=$UNAME_MACHINE_ARCH-unknown ;; esac # The Operating System including object format, if it has switched - # to ELF recently, or will in the future. - case "${UNAME_MACHINE_ARCH}" in + # to ELF recently (or will in the future) and ABI. + case $UNAME_MACHINE_ARCH in + earm*) + os=netbsdelf + ;; arm*|i386|m68k|ns32k|sh3*|sparc|vax) - eval $set_cc_for_build + set_cc_for_build if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ELF__ then @@ -197,45 +246,80 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in os=netbsd ;; esac + # Determine ABI tags. + case $UNAME_MACHINE_ARCH in + earm*) + expr='s/^earmv[0-9]/-eabi/;s/eb$//' + abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"` + ;; + esac # The OS release # Debian GNU/NetBSD machines have a different userland, and # thus, need a distinct triplet. However, they do not need # kernel version information, so it can be replaced with a # suitable tag, in the style of linux-gnu. - case "${UNAME_VERSION}" in + case $UNAME_VERSION in Debian*) release='-gnu' ;; *) - release=`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'` + release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. -f1,2` ;; esac # Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM: # contains redundant information, the shorter form: # CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used. - echo "${machine}-${os}${release}" - exit ;; + GUESS=$machine-${os}${release}${abi-} + ;; *:Bitrig:*:*) UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'` - echo ${UNAME_MACHINE_ARCH}-unknown-bitrig${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE_ARCH-unknown-bitrig$UNAME_RELEASE + ;; *:OpenBSD:*:*) UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'` - echo ${UNAME_MACHINE_ARCH}-unknown-openbsd${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE_ARCH-unknown-openbsd$UNAME_RELEASE + ;; + *:SecBSD:*:*) + UNAME_MACHINE_ARCH=`arch | sed 's/SecBSD.//'` + GUESS=$UNAME_MACHINE_ARCH-unknown-secbsd$UNAME_RELEASE + ;; + *:LibertyBSD:*:*) + UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'` + GUESS=$UNAME_MACHINE_ARCH-unknown-libertybsd$UNAME_RELEASE + ;; + *:MidnightBSD:*:*) + GUESS=$UNAME_MACHINE-unknown-midnightbsd$UNAME_RELEASE + ;; *:ekkoBSD:*:*) - echo ${UNAME_MACHINE}-unknown-ekkobsd${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-unknown-ekkobsd$UNAME_RELEASE + ;; *:SolidBSD:*:*) - echo ${UNAME_MACHINE}-unknown-solidbsd${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-unknown-solidbsd$UNAME_RELEASE + ;; + *:OS108:*:*) + GUESS=$UNAME_MACHINE-unknown-os108_$UNAME_RELEASE + ;; macppc:MirBSD:*:*) - echo powerpc-unknown-mirbsd${UNAME_RELEASE} - exit ;; + GUESS=powerpc-unknown-mirbsd$UNAME_RELEASE + ;; *:MirBSD:*:*) - echo ${UNAME_MACHINE}-unknown-mirbsd${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-unknown-mirbsd$UNAME_RELEASE + ;; + *:Sortix:*:*) + GUESS=$UNAME_MACHINE-unknown-sortix + ;; + *:Twizzler:*:*) + GUESS=$UNAME_MACHINE-unknown-twizzler + ;; + *:Redox:*:*) + GUESS=$UNAME_MACHINE-unknown-redox + ;; + mips:OSF1:*.*) + GUESS=mips-dec-osf1 + ;; alpha:OSF1:*:*) + # Reset EXIT trap before exiting to avoid spurious non-zero exit code. + trap '' 0 case $UNAME_RELEASE in *4.0) UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'` @@ -249,163 +333,158 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in # covers most systems running today. This code pipes the CPU # types through head -n 1, so we only detect the type of CPU 0. ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^ The alpha \(.*\) processor.*$/\1/p' | head -n 1` - case "$ALPHA_CPU_TYPE" in + case $ALPHA_CPU_TYPE in "EV4 (21064)") - UNAME_MACHINE="alpha" ;; + UNAME_MACHINE=alpha ;; "EV4.5 (21064)") - UNAME_MACHINE="alpha" ;; + UNAME_MACHINE=alpha ;; "LCA4 (21066/21068)") - UNAME_MACHINE="alpha" ;; + UNAME_MACHINE=alpha ;; "EV5 (21164)") - UNAME_MACHINE="alphaev5" ;; + UNAME_MACHINE=alphaev5 ;; "EV5.6 (21164A)") - UNAME_MACHINE="alphaev56" ;; + UNAME_MACHINE=alphaev56 ;; "EV5.6 (21164PC)") - UNAME_MACHINE="alphapca56" ;; + UNAME_MACHINE=alphapca56 ;; "EV5.7 (21164PC)") - UNAME_MACHINE="alphapca57" ;; + UNAME_MACHINE=alphapca57 ;; "EV6 (21264)") - UNAME_MACHINE="alphaev6" ;; + UNAME_MACHINE=alphaev6 ;; "EV6.7 (21264A)") - UNAME_MACHINE="alphaev67" ;; + UNAME_MACHINE=alphaev67 ;; "EV6.8CB (21264C)") - UNAME_MACHINE="alphaev68" ;; + UNAME_MACHINE=alphaev68 ;; "EV6.8AL (21264B)") - UNAME_MACHINE="alphaev68" ;; + UNAME_MACHINE=alphaev68 ;; "EV6.8CX (21264D)") - UNAME_MACHINE="alphaev68" ;; + UNAME_MACHINE=alphaev68 ;; "EV6.9A (21264/EV69A)") - UNAME_MACHINE="alphaev69" ;; + UNAME_MACHINE=alphaev69 ;; "EV7 (21364)") - UNAME_MACHINE="alphaev7" ;; + UNAME_MACHINE=alphaev7 ;; "EV7.9 (21364A)") - UNAME_MACHINE="alphaev79" ;; + UNAME_MACHINE=alphaev79 ;; esac # A Pn.n version is a patched version. # A Vn.n version is a released version. # A Tn.n version is a released field test version. # A Xn.n version is an unreleased experimental baselevel. # 1.2 uses "1.2" for uname -r. - echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[PVTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` - # Reset EXIT trap before exiting to avoid spurious non-zero exit code. - exitcode=$? - trap '' 0 - exit $exitcode ;; - Alpha\ *:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # Should we change UNAME_MACHINE based on the output of uname instead - # of the specific Alpha model? - echo alpha-pc-interix - exit ;; - 21064:Windows_NT:50:3) - echo alpha-dec-winnt3.5 - exit ;; + OSF_REL=`echo "$UNAME_RELEASE" | sed -e 's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz` + GUESS=$UNAME_MACHINE-dec-osf$OSF_REL + ;; Amiga*:UNIX_System_V:4.0:*) - echo m68k-unknown-sysv4 - exit ;; + GUESS=m68k-unknown-sysv4 + ;; *:[Aa]miga[Oo][Ss]:*:*) - echo ${UNAME_MACHINE}-unknown-amigaos - exit ;; + GUESS=$UNAME_MACHINE-unknown-amigaos + ;; *:[Mm]orph[Oo][Ss]:*:*) - echo ${UNAME_MACHINE}-unknown-morphos - exit ;; + GUESS=$UNAME_MACHINE-unknown-morphos + ;; *:OS/390:*:*) - echo i370-ibm-openedition - exit ;; + GUESS=i370-ibm-openedition + ;; *:z/VM:*:*) - echo s390-ibm-zvmoe - exit ;; + GUESS=s390-ibm-zvmoe + ;; *:OS400:*:*) - echo powerpc-ibm-os400 - exit ;; + GUESS=powerpc-ibm-os400 + ;; arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*) - echo arm-acorn-riscix${UNAME_RELEASE} - exit ;; + GUESS=arm-acorn-riscix$UNAME_RELEASE + ;; arm*:riscos:*:*|arm*:RISCOS:*:*) - echo arm-unknown-riscos - exit ;; + GUESS=arm-unknown-riscos + ;; SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*) - echo hppa1.1-hitachi-hiuxmpp - exit ;; + GUESS=hppa1.1-hitachi-hiuxmpp + ;; Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*) # akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE. - if test "`(/bin/universe) 2>/dev/null`" = att ; then - echo pyramid-pyramid-sysv3 - else - echo pyramid-pyramid-bsd - fi - exit ;; + case `(/bin/universe) 2>/dev/null` in + att) GUESS=pyramid-pyramid-sysv3 ;; + *) GUESS=pyramid-pyramid-bsd ;; + esac + ;; NILE*:*:*:dcosx) - echo pyramid-pyramid-svr4 - exit ;; + GUESS=pyramid-pyramid-svr4 + ;; DRS?6000:unix:4.0:6*) - echo sparc-icl-nx6 - exit ;; + GUESS=sparc-icl-nx6 + ;; DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*) case `/usr/bin/uname -p` in - sparc) echo sparc-icl-nx7; exit ;; - esac ;; + sparc) GUESS=sparc-icl-nx7 ;; + esac + ;; s390x:SunOS:*:*) - echo ${UNAME_MACHINE}-ibm-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` + GUESS=$UNAME_MACHINE-ibm-solaris2$SUN_REL + ;; sun4H:SunOS:5.*:*) - echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` + GUESS=sparc-hal-solaris2$SUN_REL + ;; sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*) - echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` + GUESS=sparc-sun-solaris2$SUN_REL + ;; i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*) - echo i386-pc-auroraux${UNAME_RELEASE} - exit ;; + GUESS=i386-pc-auroraux$UNAME_RELEASE + ;; i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*) - eval $set_cc_for_build - SUN_ARCH="i386" + set_cc_for_build + SUN_ARCH=i386 # If there is a compiler, see if it is configured for 64-bit objects. # Note that the Sun cc does not turn __LP64__ into 1 like gcc does. # This test works for both compilers. - if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then + if test "$CC_FOR_BUILD" != no_compiler_found; then if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \ - (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \ + (CCOPTS="" $CC_FOR_BUILD -m64 -E - 2>/dev/null) | \ grep IS_64BIT_ARCH >/dev/null then - SUN_ARCH="x86_64" + SUN_ARCH=x86_64 fi fi - echo ${SUN_ARCH}-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` + GUESS=$SUN_ARCH-pc-solaris2$SUN_REL + ;; sun4*:SunOS:6*:*) # According to config.sub, this is the proper way to canonicalize # SunOS6. Hard to guess exactly what SunOS6 will be like, but # it's likely to be more like Solaris than SunOS4. - echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` + GUESS=sparc-sun-solaris3$SUN_REL + ;; sun4*:SunOS:*:*) - case "`/usr/bin/arch -k`" in + case `/usr/bin/arch -k` in Series*|S4*) UNAME_RELEASE=`uname -v` ;; esac - # Japanese Language versions have a version number like `4.1.3-JL'. - echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'` - exit ;; + # Japanese Language versions have a version number like '4.1.3-JL'. + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'` + GUESS=sparc-sun-sunos$SUN_REL + ;; sun3*:SunOS:*:*) - echo m68k-sun-sunos${UNAME_RELEASE} - exit ;; + GUESS=m68k-sun-sunos$UNAME_RELEASE + ;; sun*:*:4.2BSD:*) UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null` - test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3 - case "`/bin/arch`" in + test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3 + case `/bin/arch` in sun3) - echo m68k-sun-sunos${UNAME_RELEASE} + GUESS=m68k-sun-sunos$UNAME_RELEASE ;; sun4) - echo sparc-sun-sunos${UNAME_RELEASE} + GUESS=sparc-sun-sunos$UNAME_RELEASE ;; esac - exit ;; + ;; aushp:SunOS:*:*) - echo sparc-auspex-sunos${UNAME_RELEASE} - exit ;; + GUESS=sparc-auspex-sunos$UNAME_RELEASE + ;; # The situation for MiNT is a little confusing. The machine name # can be virtually everything (everything which is not # "atarist" or "atariste" at least should have a processor @@ -415,44 +494,44 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in # MiNT. But MiNT is downward compatible to TOS, so this should # be no problem. atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*) - echo m68k-atari-mint${UNAME_RELEASE} - exit ;; + GUESS=m68k-atari-mint$UNAME_RELEASE + ;; atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*) - echo m68k-atari-mint${UNAME_RELEASE} - exit ;; + GUESS=m68k-atari-mint$UNAME_RELEASE + ;; *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*) - echo m68k-atari-mint${UNAME_RELEASE} - exit ;; + GUESS=m68k-atari-mint$UNAME_RELEASE + ;; milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*) - echo m68k-milan-mint${UNAME_RELEASE} - exit ;; + GUESS=m68k-milan-mint$UNAME_RELEASE + ;; hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*) - echo m68k-hades-mint${UNAME_RELEASE} - exit ;; + GUESS=m68k-hades-mint$UNAME_RELEASE + ;; *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*) - echo m68k-unknown-mint${UNAME_RELEASE} - exit ;; + GUESS=m68k-unknown-mint$UNAME_RELEASE + ;; m68k:machten:*:*) - echo m68k-apple-machten${UNAME_RELEASE} - exit ;; + GUESS=m68k-apple-machten$UNAME_RELEASE + ;; powerpc:machten:*:*) - echo powerpc-apple-machten${UNAME_RELEASE} - exit ;; + GUESS=powerpc-apple-machten$UNAME_RELEASE + ;; RISC*:Mach:*:*) - echo mips-dec-mach_bsd4.3 - exit ;; + GUESS=mips-dec-mach_bsd4.3 + ;; RISC*:ULTRIX:*:*) - echo mips-dec-ultrix${UNAME_RELEASE} - exit ;; + GUESS=mips-dec-ultrix$UNAME_RELEASE + ;; VAX*:ULTRIX*:*:*) - echo vax-dec-ultrix${UNAME_RELEASE} - exit ;; + GUESS=vax-dec-ultrix$UNAME_RELEASE + ;; 2020:CLIX:*:* | 2430:CLIX:*:*) - echo clipper-intergraph-clix${UNAME_RELEASE} - exit ;; + GUESS=clipper-intergraph-clix$UNAME_RELEASE + ;; mips:*:*:UMIPS | mips:*:*:RISCos) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + set_cc_for_build + sed 's/^ //' << EOF > "$dummy.c" #ifdef __cplusplus #include /* for printf() prototype */ int main (int argc, char *argv[]) { @@ -461,95 +540,96 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in #endif #if defined (host_mips) && defined (MIPSEB) #if defined (SYSTYPE_SYSV) - printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0); + printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0); #endif #if defined (SYSTYPE_SVR4) - printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0); + printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0); #endif #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD) - printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0); + printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0); #endif #endif exit (-1); } EOF - $CC_FOR_BUILD -o $dummy $dummy.c && - dummyarg=`echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` && - SYSTEM_NAME=`$dummy $dummyarg` && + $CC_FOR_BUILD -o "$dummy" "$dummy.c" && + dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` && + SYSTEM_NAME=`"$dummy" "$dummyarg"` && { echo "$SYSTEM_NAME"; exit; } - echo mips-mips-riscos${UNAME_RELEASE} - exit ;; + GUESS=mips-mips-riscos$UNAME_RELEASE + ;; Motorola:PowerMAX_OS:*:*) - echo powerpc-motorola-powermax - exit ;; + GUESS=powerpc-motorola-powermax + ;; Motorola:*:4.3:PL8-*) - echo powerpc-harris-powermax - exit ;; + GUESS=powerpc-harris-powermax + ;; Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*) - echo powerpc-harris-powermax - exit ;; + GUESS=powerpc-harris-powermax + ;; Night_Hawk:Power_UNIX:*:*) - echo powerpc-harris-powerunix - exit ;; + GUESS=powerpc-harris-powerunix + ;; m88k:CX/UX:7*:*) - echo m88k-harris-cxux7 - exit ;; + GUESS=m88k-harris-cxux7 + ;; m88k:*:4*:R4*) - echo m88k-motorola-sysv4 - exit ;; + GUESS=m88k-motorola-sysv4 + ;; m88k:*:3*:R3*) - echo m88k-motorola-sysv3 - exit ;; + GUESS=m88k-motorola-sysv3 + ;; AViiON:dgux:*:*) # DG/UX returns AViiON for all architectures UNAME_PROCESSOR=`/usr/bin/uname -p` - if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ] + if test "$UNAME_PROCESSOR" = mc88100 || test "$UNAME_PROCESSOR" = mc88110 then - if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \ - [ ${TARGET_BINARY_INTERFACE}x = x ] + if test "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx || \ + test "$TARGET_BINARY_INTERFACE"x = x then - echo m88k-dg-dgux${UNAME_RELEASE} + GUESS=m88k-dg-dgux$UNAME_RELEASE else - echo m88k-dg-dguxbcs${UNAME_RELEASE} + GUESS=m88k-dg-dguxbcs$UNAME_RELEASE fi else - echo i586-dg-dgux${UNAME_RELEASE} + GUESS=i586-dg-dgux$UNAME_RELEASE fi - exit ;; + ;; M88*:DolphinOS:*:*) # DolphinOS (SVR3) - echo m88k-dolphin-sysv3 - exit ;; + GUESS=m88k-dolphin-sysv3 + ;; M88*:*:R3*:*) # Delta 88k system running SVR3 - echo m88k-motorola-sysv3 - exit ;; + GUESS=m88k-motorola-sysv3 + ;; XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3) - echo m88k-tektronix-sysv3 - exit ;; + GUESS=m88k-tektronix-sysv3 + ;; Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD) - echo m68k-tektronix-bsd - exit ;; + GUESS=m68k-tektronix-bsd + ;; *:IRIX*:*:*) - echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'` - exit ;; + IRIX_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/g'` + GUESS=mips-sgi-irix$IRIX_REL + ;; ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. - echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id - exit ;; # Note that: echo "'`uname -s`'" gives 'AIX ' + GUESS=romp-ibm-aix # uname -m gives an 8 hex-code CPU id + ;; # Note that: echo "'`uname -s`'" gives 'AIX ' i*86:AIX:*:*) - echo i386-ibm-aix - exit ;; + GUESS=i386-ibm-aix + ;; ia64:AIX:*:*) - if [ -x /usr/bin/oslevel ] ; then + if test -x /usr/bin/oslevel ; then IBM_REV=`/usr/bin/oslevel` else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} + IBM_REV=$UNAME_VERSION.$UNAME_RELEASE fi - echo ${UNAME_MACHINE}-ibm-aix${IBM_REV} - exit ;; + GUESS=$UNAME_MACHINE-ibm-aix$IBM_REV + ;; *:AIX:2:3) if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + set_cc_for_build + sed 's/^ //' << EOF > "$dummy.c" #include main() @@ -560,76 +640,77 @@ EOF exit(0); } EOF - if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` + if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` then - echo "$SYSTEM_NAME" + GUESS=$SYSTEM_NAME else - echo rs6000-ibm-aix3.2.5 + GUESS=rs6000-ibm-aix3.2.5 fi elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then - echo rs6000-ibm-aix3.2.4 + GUESS=rs6000-ibm-aix3.2.4 else - echo rs6000-ibm-aix3.2 + GUESS=rs6000-ibm-aix3.2 fi - exit ;; + ;; *:AIX:*:[4567]) IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` - if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then + if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then IBM_ARCH=rs6000 else IBM_ARCH=powerpc fi - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` + if test -x /usr/bin/lslpp ; then + IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | \ + awk -F: '{ print $3 }' | sed s/[0-9]*$/0/` else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} + IBM_REV=$UNAME_VERSION.$UNAME_RELEASE fi - echo ${IBM_ARCH}-ibm-aix${IBM_REV} - exit ;; + GUESS=$IBM_ARCH-ibm-aix$IBM_REV + ;; *:AIX:*:*) - echo rs6000-ibm-aix - exit ;; - ibmrt:4.4BSD:*|romp-ibm:BSD:*) - echo romp-ibm-bsd4.4 - exit ;; + GUESS=rs6000-ibm-aix + ;; + ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*) + GUESS=romp-ibm-bsd4.4 + ;; ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and - echo romp-ibm-bsd${UNAME_RELEASE} # 4.3 with uname added to - exit ;; # report: romp-ibm BSD 4.3 + GUESS=romp-ibm-bsd$UNAME_RELEASE # 4.3 with uname added to + ;; # report: romp-ibm BSD 4.3 *:BOSX:*:*) - echo rs6000-bull-bosx - exit ;; + GUESS=rs6000-bull-bosx + ;; DPX/2?00:B.O.S.:*:*) - echo m68k-bull-sysv3 - exit ;; + GUESS=m68k-bull-sysv3 + ;; 9000/[34]??:4.3bsd:1.*:*) - echo m68k-hp-bsd - exit ;; + GUESS=m68k-hp-bsd + ;; hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) - echo m68k-hp-bsd4.4 - exit ;; + GUESS=m68k-hp-bsd4.4 + ;; 9000/[34678]??:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - case "${UNAME_MACHINE}" in - 9000/31? ) HP_ARCH=m68000 ;; - 9000/[34]?? ) HP_ARCH=m68k ;; + HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'` + case $UNAME_MACHINE in + 9000/31?) HP_ARCH=m68000 ;; + 9000/[34]??) HP_ARCH=m68k ;; 9000/[678][0-9][0-9]) - if [ -x /usr/bin/getconf ]; then + if test -x /usr/bin/getconf; then sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` - case "${sc_cpu_version}" in - 523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0 - 528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1 + case $sc_cpu_version in + 523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0 + 528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1 532) # CPU_PA_RISC2_0 - case "${sc_kernel_bits}" in - 32) HP_ARCH="hppa2.0n" ;; - 64) HP_ARCH="hppa2.0w" ;; - '') HP_ARCH="hppa2.0" ;; # HP-UX 10.20 + case $sc_kernel_bits in + 32) HP_ARCH=hppa2.0n ;; + 64) HP_ARCH=hppa2.0w ;; + '') HP_ARCH=hppa2.0 ;; # HP-UX 10.20 esac ;; esac fi - if [ "${HP_ARCH}" = "" ]; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + if test "$HP_ARCH" = ""; then + set_cc_for_build + sed 's/^ //' << EOF > "$dummy.c" #define _HPUX_SOURCE #include @@ -662,13 +743,13 @@ EOF exit (0); } EOF - (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy` + (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"` test -z "$HP_ARCH" && HP_ARCH=hppa fi ;; esac - if [ ${HP_ARCH} = "hppa2.0w" ] + if test "$HP_ARCH" = hppa2.0w then - eval $set_cc_for_build + set_cc_for_build # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler @@ -679,23 +760,23 @@ EOF # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess # => hppa64-hp-hpux11.23 - if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | + if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | grep -q __LP64__ then - HP_ARCH="hppa2.0w" + HP_ARCH=hppa2.0w else - HP_ARCH="hppa64" + HP_ARCH=hppa64 fi fi - echo ${HP_ARCH}-hp-hpux${HPUX_REV} - exit ;; + GUESS=$HP_ARCH-hp-hpux$HPUX_REV + ;; ia64:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - echo ia64-hp-hpux${HPUX_REV} - exit ;; + HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'` + GUESS=ia64-hp-hpux$HPUX_REV + ;; 3050*:HI-UX:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + set_cc_for_build + sed 's/^ //' << EOF > "$dummy.c" #include int main () @@ -720,38 +801,38 @@ EOF exit (0); } EOF - $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` && + $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` && { echo "$SYSTEM_NAME"; exit; } - echo unknown-hitachi-hiuxwe2 - exit ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* ) - echo hppa1.1-hp-bsd - exit ;; + GUESS=unknown-hitachi-hiuxwe2 + ;; + 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*) + GUESS=hppa1.1-hp-bsd + ;; 9000/8??:4.3bsd:*:*) - echo hppa1.0-hp-bsd - exit ;; + GUESS=hppa1.0-hp-bsd + ;; *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) - echo hppa1.0-hp-mpeix - exit ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* ) - echo hppa1.1-hp-osf - exit ;; + GUESS=hppa1.0-hp-mpeix + ;; + hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*) + GUESS=hppa1.1-hp-osf + ;; hp8??:OSF1:*:*) - echo hppa1.0-hp-osf - exit ;; + GUESS=hppa1.0-hp-osf + ;; i*86:OSF1:*:*) - if [ -x /usr/sbin/sysversion ] ; then - echo ${UNAME_MACHINE}-unknown-osf1mk + if test -x /usr/sbin/sysversion ; then + GUESS=$UNAME_MACHINE-unknown-osf1mk else - echo ${UNAME_MACHINE}-unknown-osf1 + GUESS=$UNAME_MACHINE-unknown-osf1 fi - exit ;; + ;; parisc*:Lites*:*:*) - echo hppa1.1-hp-lites - exit ;; + GUESS=hppa1.1-hp-lites + ;; C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) - echo c1-convex-bsd - exit ;; + GUESS=c1-convex-bsd + ;; C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) if getsysinfo -f scalar_acc then echo c32-convex-bsd @@ -759,139 +840,174 @@ EOF fi exit ;; C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) - echo c34-convex-bsd - exit ;; + GUESS=c34-convex-bsd + ;; C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) - echo c38-convex-bsd - exit ;; + GUESS=c38-convex-bsd + ;; C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) - echo c4-convex-bsd - exit ;; + GUESS=c4-convex-bsd + ;; CRAY*Y-MP:*:*:*) - echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; + CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'` + GUESS=ymp-cray-unicos$CRAY_REL + ;; CRAY*[A-Z]90:*:*:*) - echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \ + echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \ | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ -e 's/\.[^.]*$/.X/' exit ;; CRAY*TS:*:*:*) - echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; + CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'` + GUESS=t90-cray-unicos$CRAY_REL + ;; CRAY*T3E:*:*:*) - echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; + CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'` + GUESS=alphaev5-cray-unicosmk$CRAY_REL + ;; CRAY*SV1:*:*:*) - echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; + CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'` + GUESS=sv1-cray-unicos$CRAY_REL + ;; *:UNICOS/mp:*:*) - echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; + CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'` + GUESS=craynv-cray-unicosmp$CRAY_REL + ;; F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) - FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'` - echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; + FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz` + FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` + FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'` + GUESS=${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL} + ;; 5000:UNIX_System_V:4.*:*) - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'` - echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; + FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` + FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'` + GUESS=sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL} + ;; i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) - echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-pc-bsdi$UNAME_RELEASE + ;; sparc*:BSD/OS:*:*) - echo sparc-unknown-bsdi${UNAME_RELEASE} - exit ;; + GUESS=sparc-unknown-bsdi$UNAME_RELEASE + ;; *:BSD/OS:*:*) - echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-unknown-bsdi$UNAME_RELEASE + ;; + arm:FreeBSD:*:*) + UNAME_PROCESSOR=`uname -p` + set_cc_for_build + if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \ + | grep -q __ARM_PCS_VFP + then + FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'` + GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabi + else + FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'` + GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabihf + fi + ;; *:FreeBSD:*:*) - UNAME_PROCESSOR=`/usr/bin/uname -p` - case ${UNAME_PROCESSOR} in + UNAME_PROCESSOR=`uname -p` + case $UNAME_PROCESSOR in amd64) - echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - *) - echo ${UNAME_PROCESSOR}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; + UNAME_PROCESSOR=x86_64 ;; + i386) + UNAME_PROCESSOR=i586 ;; esac - exit ;; + FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'` + GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL + ;; i*:CYGWIN*:*) - echo ${UNAME_MACHINE}-pc-cygwin - exit ;; + GUESS=$UNAME_MACHINE-pc-cygwin + ;; *:MINGW64*:*) - echo ${UNAME_MACHINE}-pc-mingw64 - exit ;; + GUESS=$UNAME_MACHINE-pc-mingw64 + ;; *:MINGW*:*) - echo ${UNAME_MACHINE}-pc-mingw32 - exit ;; - i*:MSYS*:*) - echo ${UNAME_MACHINE}-pc-msys - exit ;; - i*:windows32*:*) - # uname -m includes "-pc" on this system. - echo ${UNAME_MACHINE}-mingw32 - exit ;; + GUESS=$UNAME_MACHINE-pc-mingw32 + ;; + *:MSYS*:*) + GUESS=$UNAME_MACHINE-pc-msys + ;; i*:PW*:*) - echo ${UNAME_MACHINE}-pc-pw32 - exit ;; + GUESS=$UNAME_MACHINE-pc-pw32 + ;; + *:SerenityOS:*:*) + GUESS=$UNAME_MACHINE-pc-serenity + ;; *:Interix*:*) - case ${UNAME_MACHINE} in + case $UNAME_MACHINE in x86) - echo i586-pc-interix${UNAME_RELEASE} - exit ;; + GUESS=i586-pc-interix$UNAME_RELEASE + ;; authenticamd | genuineintel | EM64T) - echo x86_64-unknown-interix${UNAME_RELEASE} - exit ;; + GUESS=x86_64-unknown-interix$UNAME_RELEASE + ;; IA64) - echo ia64-unknown-interix${UNAME_RELEASE} - exit ;; + GUESS=ia64-unknown-interix$UNAME_RELEASE + ;; esac ;; - [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*) - echo i${UNAME_MACHINE}-pc-mks - exit ;; - 8664:Windows_NT:*) - echo x86_64-pc-mks - exit ;; - i*:Windows_NT*:* | Pentium*:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we - # UNAME_MACHINE based on the output of uname instead of i386? - echo i586-pc-interix - exit ;; i*:UWIN*:*) - echo ${UNAME_MACHINE}-pc-uwin - exit ;; + GUESS=$UNAME_MACHINE-pc-uwin + ;; amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) - echo x86_64-unknown-cygwin - exit ;; - p*:CYGWIN*:*) - echo powerpcle-unknown-cygwin - exit ;; + GUESS=x86_64-pc-cygwin + ;; prep*:SunOS:5.*:*) - echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; + SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` + GUESS=powerpcle-unknown-solaris2$SUN_REL + ;; *:GNU:*:*) # the GNU system - echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-${LIBC}`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'` - exit ;; + GNU_ARCH=`echo "$UNAME_MACHINE" | sed -e 's,[-/].*$,,'` + GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's,/.*$,,'` + GUESS=$GNU_ARCH-unknown-$LIBC$GNU_REL + ;; *:GNU/*:*:*) # other systems with GNU libc and userland - echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-${LIBC} - exit ;; - i*86:Minix:*:*) - echo ${UNAME_MACHINE}-pc-minix - exit ;; + GNU_SYS=`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"` + GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'` + GUESS=$UNAME_MACHINE-unknown-$GNU_SYS$GNU_REL-$LIBC + ;; + x86_64:[Mm]anagarm:*:*|i?86:[Mm]anagarm:*:*) + GUESS="$UNAME_MACHINE-pc-managarm-mlibc" + ;; + *:[Mm]anagarm:*:*) + GUESS="$UNAME_MACHINE-unknown-managarm-mlibc" + ;; + *:Minix:*:*) + GUESS=$UNAME_MACHINE-unknown-minix + ;; aarch64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + set_cc_for_build + CPU=$UNAME_MACHINE + LIBCABI=$LIBC + if test "$CC_FOR_BUILD" != no_compiler_found; then + ABI=64 + sed 's/^ //' << EOF > "$dummy.c" + #ifdef __ARM_EABI__ + #ifdef __ARM_PCS_VFP + ABI=eabihf + #else + ABI=eabi + #endif + #endif +EOF + cc_set_abi=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^ABI' | sed 's, ,,g'` + eval "$cc_set_abi" + case $ABI in + eabi | eabihf) CPU=armv8l; LIBCABI=$LIBC$ABI ;; + esac + fi + GUESS=$CPU-unknown-linux-$LIBCABI + ;; aarch64_be:Linux:*:*) UNAME_MACHINE=aarch64_be - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; alpha:Linux:*:*) - case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in + case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 2>/dev/null` in EV5) UNAME_MACHINE=alphaev5 ;; EV56) UNAME_MACHINE=alphaev56 ;; PCA56) UNAME_MACHINE=alphapca56 ;; @@ -901,172 +1017,246 @@ EOF EV68*) UNAME_MACHINE=alphaev68 ;; esac objdump --private-headers /bin/sh | grep -q ld.so.1 - if test "$?" = 0 ; then LIBC="gnulibc1" ; fi - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; - arc:Linux:*:* | arceb:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + if test "$?" = 0 ; then LIBC=gnulibc1 ; fi + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; + arc:Linux:*:* | arceb:Linux:*:* | arc32:Linux:*:* | arc64:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; arm*:Linux:*:*) - eval $set_cc_for_build + set_cc_for_build if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ARM_EABI__ then - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC else if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \ | grep -q __ARM_PCS_VFP then - echo ${UNAME_MACHINE}-unknown-linux-${LIBC}eabi + GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabi else - echo ${UNAME_MACHINE}-unknown-linux-${LIBC}eabihf + GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabihf fi fi - exit ;; + ;; avr32*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; cris:Linux:*:*) - echo ${UNAME_MACHINE}-axis-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-axis-linux-$LIBC + ;; crisv32:Linux:*:*) - echo ${UNAME_MACHINE}-axis-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-axis-linux-$LIBC + ;; + e2k:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; frv:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; hexagon:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; i*86:Linux:*:*) - echo ${UNAME_MACHINE}-pc-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-pc-linux-$LIBC + ;; ia64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; + k1om:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; + kvx:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; + kvx:cos:*:*) + GUESS=$UNAME_MACHINE-unknown-cos + ;; + kvx:mbr:*:*) + GUESS=$UNAME_MACHINE-unknown-mbr + ;; + loongarch32:Linux:*:* | loongarch64:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; m32r*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; m68*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; mips:Linux:*:* | mips64:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c + set_cc_for_build + IS_GLIBC=0 + test x"${LIBC}" = xgnu && IS_GLIBC=1 + sed 's/^ //' << EOF > "$dummy.c" #undef CPU - #undef ${UNAME_MACHINE} - #undef ${UNAME_MACHINE}el + #undef mips + #undef mipsel + #undef mips64 + #undef mips64el + #if ${IS_GLIBC} && defined(_ABI64) + LIBCABI=gnuabi64 + #else + #if ${IS_GLIBC} && defined(_ABIN32) + LIBCABI=gnuabin32 + #else + LIBCABI=${LIBC} + #endif + #endif + + #if ${IS_GLIBC} && defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6 + CPU=mipsisa64r6 + #else + #if ${IS_GLIBC} && !defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6 + CPU=mipsisa32r6 + #else + #if defined(__mips64) + CPU=mips64 + #else + CPU=mips + #endif + #endif + #endif + #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=${UNAME_MACHINE}el + MIPS_ENDIAN=el #else #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=${UNAME_MACHINE} + MIPS_ENDIAN= #else - CPU= + MIPS_ENDIAN= #endif #endif EOF - eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'` - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-${LIBC}"; exit; } + cc_set_vars=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU\|^MIPS_ENDIAN\|^LIBCABI'` + eval "$cc_set_vars" + test "x$CPU" != x && { echo "$CPU${MIPS_ENDIAN}-unknown-linux-$LIBCABI"; exit; } + ;; + mips64el:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; + openrisc*:Linux:*:*) + GUESS=or1k-unknown-linux-$LIBC + ;; + or32:Linux:*:* | or1k*:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC ;; - or1k:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; - or32:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; padre:Linux:*:*) - echo sparc-unknown-linux-${LIBC} - exit ;; + GUESS=sparc-unknown-linux-$LIBC + ;; parisc64:Linux:*:* | hppa64:Linux:*:*) - echo hppa64-unknown-linux-${LIBC} - exit ;; + GUESS=hppa64-unknown-linux-$LIBC + ;; parisc:Linux:*:* | hppa:Linux:*:*) # Look for CPU level case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in - PA7*) echo hppa1.1-unknown-linux-${LIBC} ;; - PA8*) echo hppa2.0-unknown-linux-${LIBC} ;; - *) echo hppa-unknown-linux-${LIBC} ;; + PA7*) GUESS=hppa1.1-unknown-linux-$LIBC ;; + PA8*) GUESS=hppa2.0-unknown-linux-$LIBC ;; + *) GUESS=hppa-unknown-linux-$LIBC ;; esac - exit ;; + ;; ppc64:Linux:*:*) - echo powerpc64-unknown-linux-${LIBC} - exit ;; + GUESS=powerpc64-unknown-linux-$LIBC + ;; ppc:Linux:*:*) - echo powerpc-unknown-linux-${LIBC} - exit ;; + GUESS=powerpc-unknown-linux-$LIBC + ;; ppc64le:Linux:*:*) - echo powerpc64le-unknown-linux-${LIBC} - exit ;; + GUESS=powerpc64le-unknown-linux-$LIBC + ;; ppcle:Linux:*:*) - echo powerpcle-unknown-linux-${LIBC} - exit ;; + GUESS=powerpcle-unknown-linux-$LIBC + ;; + riscv32:Linux:*:* | riscv32be:Linux:*:* | riscv64:Linux:*:* | riscv64be:Linux:*:*) + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; s390:Linux:*:* | s390x:Linux:*:*) - echo ${UNAME_MACHINE}-ibm-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-ibm-linux-$LIBC + ;; sh64*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; sh*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; sparc:Linux:*:* | sparc64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; tile*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; vax:Linux:*:*) - echo ${UNAME_MACHINE}-dec-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-dec-linux-$LIBC + ;; x86_64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + set_cc_for_build + CPU=$UNAME_MACHINE + LIBCABI=$LIBC + if test "$CC_FOR_BUILD" != no_compiler_found; then + ABI=64 + sed 's/^ //' << EOF > "$dummy.c" + #ifdef __i386__ + ABI=x86 + #else + #ifdef __ILP32__ + ABI=x32 + #endif + #endif +EOF + cc_set_abi=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^ABI' | sed 's, ,,g'` + eval "$cc_set_abi" + case $ABI in + x86) CPU=i686 ;; + x32) LIBCABI=${LIBC}x32 ;; + esac + fi + GUESS=$CPU-pc-linux-$LIBCABI + ;; xtensa*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-${LIBC} - exit ;; + GUESS=$UNAME_MACHINE-unknown-linux-$LIBC + ;; i*86:DYNIX/ptx:4*:*) # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. # earlier versions are messed up and put the nodename in both # sysname and nodename. - echo i386-sequent-sysv4 - exit ;; + GUESS=i386-sequent-sysv4 + ;; i*86:UNIX_SV:4.2MP:2.*) # Unixware is an offshoot of SVR4, but it has its own version # number series starting with 2... # I am not positive that other SVR4 systems won't match this, # I just have to hope. -- rms. # Use sysv4.2uw... so that sysv4* matches it. - echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION} - exit ;; + GUESS=$UNAME_MACHINE-pc-sysv4.2uw$UNAME_VERSION + ;; i*86:OS/2:*:*) - # If we were able to find `uname', then EMX Unix compatibility + # If we were able to find 'uname', then EMX Unix compatibility # is probably installed. - echo ${UNAME_MACHINE}-pc-os2-emx - exit ;; + GUESS=$UNAME_MACHINE-pc-os2-emx + ;; i*86:XTS-300:*:STOP) - echo ${UNAME_MACHINE}-unknown-stop - exit ;; + GUESS=$UNAME_MACHINE-unknown-stop + ;; i*86:atheos:*:*) - echo ${UNAME_MACHINE}-unknown-atheos - exit ;; + GUESS=$UNAME_MACHINE-unknown-atheos + ;; i*86:syllable:*:*) - echo ${UNAME_MACHINE}-pc-syllable - exit ;; + GUESS=$UNAME_MACHINE-pc-syllable + ;; i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*) - echo i386-unknown-lynxos${UNAME_RELEASE} - exit ;; + GUESS=i386-unknown-lynxos$UNAME_RELEASE + ;; i*86:*DOS:*:*) - echo ${UNAME_MACHINE}-pc-msdosdjgpp - exit ;; - i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*) - UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'` + GUESS=$UNAME_MACHINE-pc-msdosdjgpp + ;; + i*86:*:4.*:*) + UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'` if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then - echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL} + GUESS=$UNAME_MACHINE-univel-sysv$UNAME_REL else - echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL} + GUESS=$UNAME_MACHINE-pc-sysv$UNAME_REL fi - exit ;; + ;; i*86:*:5:[678]*) # UnixWare 7.x, OpenUNIX and OpenServer 6. case `/bin/uname -X | grep "^Machine"` in @@ -1074,12 +1264,12 @@ EOF *Pentium) UNAME_MACHINE=i586 ;; *Pent*|*Celeron) UNAME_MACHINE=i686 ;; esac - echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION} - exit ;; + GUESS=$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION} + ;; i*86:*:3.2:*) if test -f /usr/options/cb.name; then UNAME_REL=`sed -n 's/.*Version //p' /dev/null >/dev/null ; then UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')` (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486 @@ -1089,43 +1279,43 @@ EOF && UNAME_MACHINE=i686 (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \ && UNAME_MACHINE=i686 - echo ${UNAME_MACHINE}-pc-sco$UNAME_REL + GUESS=$UNAME_MACHINE-pc-sco$UNAME_REL else - echo ${UNAME_MACHINE}-pc-sysv32 + GUESS=$UNAME_MACHINE-pc-sysv32 fi - exit ;; + ;; pc:*:*:*) # Left here for compatibility: # uname -m prints for DJGPP always 'pc', but it prints nothing about # the processor, so we play safe by assuming i586. # Note: whatever this is, it MUST be the same as what config.sub - # prints for the "djgpp" host, or else GDB configury will decide that + # prints for the "djgpp" host, or else GDB configure will decide that # this is a cross-build. - echo i586-pc-msdosdjgpp - exit ;; + GUESS=i586-pc-msdosdjgpp + ;; Intel:Mach:3*:*) - echo i386-pc-mach3 - exit ;; + GUESS=i386-pc-mach3 + ;; paragon:*:*:*) - echo i860-intel-osf1 - exit ;; + GUESS=i860-intel-osf1 + ;; i860:*:4.*:*) # i860-SVR4 if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then - echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4 + GUESS=i860-stardent-sysv$UNAME_RELEASE # Stardent Vistra i860-SVR4 else # Add other i860-SVR4 vendors below as they are discovered. - echo i860-unknown-sysv${UNAME_RELEASE} # Unknown i860-SVR4 + GUESS=i860-unknown-sysv$UNAME_RELEASE # Unknown i860-SVR4 fi - exit ;; + ;; mini*:CTIX:SYS*5:*) # "miniframe" - echo m68010-convergent-sysv - exit ;; + GUESS=m68010-convergent-sysv + ;; mc68k:UNIX:SYSTEM5:3.51m) - echo m68k-convergent-sysv - exit ;; + GUESS=m68k-convergent-sysv + ;; M680?0:D-NIX:5.3:*) - echo m68k-diab-dnix - exit ;; + GUESS=m68k-diab-dnix + ;; M68*:*:R3V[5678]*:*) test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;; 3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0) @@ -1133,9 +1323,9 @@ EOF test -r /etc/.relid \ && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } + && { echo i486-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; + && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;; 3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*) /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ && { echo i486-ncr-sysv4; exit; } ;; @@ -1144,228 +1334,287 @@ EOF test -r /etc/.relid \ && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } + && { echo i486-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } + && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } /bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; + && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;; m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*) - echo m68k-unknown-lynxos${UNAME_RELEASE} - exit ;; + GUESS=m68k-unknown-lynxos$UNAME_RELEASE + ;; mc68030:UNIX_System_V:4.*:*) - echo m68k-atari-sysv4 - exit ;; + GUESS=m68k-atari-sysv4 + ;; TSUNAMI:LynxOS:2.*:*) - echo sparc-unknown-lynxos${UNAME_RELEASE} - exit ;; + GUESS=sparc-unknown-lynxos$UNAME_RELEASE + ;; rs6000:LynxOS:2.*:*) - echo rs6000-unknown-lynxos${UNAME_RELEASE} - exit ;; + GUESS=rs6000-unknown-lynxos$UNAME_RELEASE + ;; PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*) - echo powerpc-unknown-lynxos${UNAME_RELEASE} - exit ;; + GUESS=powerpc-unknown-lynxos$UNAME_RELEASE + ;; SM[BE]S:UNIX_SV:*:*) - echo mips-dde-sysv${UNAME_RELEASE} - exit ;; + GUESS=mips-dde-sysv$UNAME_RELEASE + ;; RM*:ReliantUNIX-*:*:*) - echo mips-sni-sysv4 - exit ;; + GUESS=mips-sni-sysv4 + ;; RM*:SINIX-*:*:*) - echo mips-sni-sysv4 - exit ;; + GUESS=mips-sni-sysv4 + ;; *:SINIX-*:*:*) if uname -p 2>/dev/null >/dev/null ; then UNAME_MACHINE=`(uname -p) 2>/dev/null` - echo ${UNAME_MACHINE}-sni-sysv4 + GUESS=$UNAME_MACHINE-sni-sysv4 else - echo ns32k-sni-sysv + GUESS=ns32k-sni-sysv fi - exit ;; - PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort + ;; + PENTIUM:*:4.0*:*) # Unisys 'ClearPath HMP IX 4000' SVR4/MP effort # says - echo i586-unisys-sysv4 - exit ;; + GUESS=i586-unisys-sysv4 + ;; *:UNIX_System_V:4*:FTX*) # From Gerald Hewes . # How about differentiating between stratus architectures? -djm - echo hppa1.1-stratus-sysv4 - exit ;; + GUESS=hppa1.1-stratus-sysv4 + ;; *:*:*:FTX*) # From seanf@swdc.stratus.com. - echo i860-stratus-sysv4 - exit ;; + GUESS=i860-stratus-sysv4 + ;; i*86:VOS:*:*) # From Paul.Green@stratus.com. - echo ${UNAME_MACHINE}-stratus-vos - exit ;; + GUESS=$UNAME_MACHINE-stratus-vos + ;; *:VOS:*:*) # From Paul.Green@stratus.com. - echo hppa1.1-stratus-vos - exit ;; + GUESS=hppa1.1-stratus-vos + ;; mc68*:A/UX:*:*) - echo m68k-apple-aux${UNAME_RELEASE} - exit ;; + GUESS=m68k-apple-aux$UNAME_RELEASE + ;; news*:NEWS-OS:6*:*) - echo mips-sony-newsos6 - exit ;; + GUESS=mips-sony-newsos6 + ;; R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*) - if [ -d /usr/nec ]; then - echo mips-nec-sysv${UNAME_RELEASE} + if test -d /usr/nec; then + GUESS=mips-nec-sysv$UNAME_RELEASE else - echo mips-unknown-sysv${UNAME_RELEASE} + GUESS=mips-unknown-sysv$UNAME_RELEASE fi - exit ;; + ;; BeBox:BeOS:*:*) # BeOS running on hardware made by Be, PPC only. - echo powerpc-be-beos - exit ;; + GUESS=powerpc-be-beos + ;; BeMac:BeOS:*:*) # BeOS running on Mac or Mac clone, PPC only. - echo powerpc-apple-beos - exit ;; + GUESS=powerpc-apple-beos + ;; BePC:BeOS:*:*) # BeOS running on Intel PC compatible. - echo i586-pc-beos - exit ;; + GUESS=i586-pc-beos + ;; BePC:Haiku:*:*) # Haiku running on Intel PC compatible. - echo i586-pc-haiku - exit ;; - x86_64:Haiku:*:*) - echo x86_64-unknown-haiku - exit ;; + GUESS=i586-pc-haiku + ;; + ppc:Haiku:*:*) # Haiku running on Apple PowerPC + GUESS=powerpc-apple-haiku + ;; + *:Haiku:*:*) # Haiku modern gcc (not bound by BeOS compat) + GUESS=$UNAME_MACHINE-unknown-haiku + ;; SX-4:SUPER-UX:*:*) - echo sx4-nec-superux${UNAME_RELEASE} - exit ;; + GUESS=sx4-nec-superux$UNAME_RELEASE + ;; SX-5:SUPER-UX:*:*) - echo sx5-nec-superux${UNAME_RELEASE} - exit ;; + GUESS=sx5-nec-superux$UNAME_RELEASE + ;; SX-6:SUPER-UX:*:*) - echo sx6-nec-superux${UNAME_RELEASE} - exit ;; + GUESS=sx6-nec-superux$UNAME_RELEASE + ;; SX-7:SUPER-UX:*:*) - echo sx7-nec-superux${UNAME_RELEASE} - exit ;; + GUESS=sx7-nec-superux$UNAME_RELEASE + ;; SX-8:SUPER-UX:*:*) - echo sx8-nec-superux${UNAME_RELEASE} - exit ;; + GUESS=sx8-nec-superux$UNAME_RELEASE + ;; SX-8R:SUPER-UX:*:*) - echo sx8r-nec-superux${UNAME_RELEASE} - exit ;; + GUESS=sx8r-nec-superux$UNAME_RELEASE + ;; + SX-ACE:SUPER-UX:*:*) + GUESS=sxace-nec-superux$UNAME_RELEASE + ;; Power*:Rhapsody:*:*) - echo powerpc-apple-rhapsody${UNAME_RELEASE} - exit ;; + GUESS=powerpc-apple-rhapsody$UNAME_RELEASE + ;; *:Rhapsody:*:*) - echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-apple-rhapsody$UNAME_RELEASE + ;; + arm64:Darwin:*:*) + GUESS=aarch64-apple-darwin$UNAME_RELEASE + ;; *:Darwin:*:*) - UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown - eval $set_cc_for_build - if test "$UNAME_PROCESSOR" = unknown ; then - UNAME_PROCESSOR=powerpc + UNAME_PROCESSOR=`uname -p` + case $UNAME_PROCESSOR in + unknown) UNAME_PROCESSOR=powerpc ;; + esac + if command -v xcode-select > /dev/null 2> /dev/null && \ + ! xcode-select --print-path > /dev/null 2> /dev/null ; then + # Avoid executing cc if there is no toolchain installed as + # cc will be a stub that puts up a graphical alert + # prompting the user to install developer tools. + CC_FOR_BUILD=no_compiler_found + else + set_cc_for_build fi - if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then + if test "$CC_FOR_BUILD" != no_compiler_found; then if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \ - (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \ - grep IS_64BIT_ARCH >/dev/null + (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ + grep IS_64BIT_ARCH >/dev/null then case $UNAME_PROCESSOR in i386) UNAME_PROCESSOR=x86_64 ;; powerpc) UNAME_PROCESSOR=powerpc64 ;; esac fi + # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc + if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \ + (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ + grep IS_PPC >/dev/null + then + UNAME_PROCESSOR=powerpc + fi + elif test "$UNAME_PROCESSOR" = i386 ; then + # uname -m returns i386 or x86_64 + UNAME_PROCESSOR=$UNAME_MACHINE fi - echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_PROCESSOR-apple-darwin$UNAME_RELEASE + ;; *:procnto*:*:* | *:QNX:[0123456789]*:*) UNAME_PROCESSOR=`uname -p` - if test "$UNAME_PROCESSOR" = "x86"; then + if test "$UNAME_PROCESSOR" = x86; then UNAME_PROCESSOR=i386 UNAME_MACHINE=pc fi - echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_PROCESSOR-$UNAME_MACHINE-nto-qnx$UNAME_RELEASE + ;; *:QNX:*:4*) - echo i386-pc-qnx - exit ;; - NEO-?:NONSTOP_KERNEL:*:*) - echo neo-tandem-nsk${UNAME_RELEASE} - exit ;; + GUESS=i386-pc-qnx + ;; + NEO-*:NONSTOP_KERNEL:*:*) + GUESS=neo-tandem-nsk$UNAME_RELEASE + ;; NSE-*:NONSTOP_KERNEL:*:*) - echo nse-tandem-nsk${UNAME_RELEASE} - exit ;; - NSR-?:NONSTOP_KERNEL:*:*) - echo nsr-tandem-nsk${UNAME_RELEASE} - exit ;; + GUESS=nse-tandem-nsk$UNAME_RELEASE + ;; + NSR-*:NONSTOP_KERNEL:*:*) + GUESS=nsr-tandem-nsk$UNAME_RELEASE + ;; + NSV-*:NONSTOP_KERNEL:*:*) + GUESS=nsv-tandem-nsk$UNAME_RELEASE + ;; + NSX-*:NONSTOP_KERNEL:*:*) + GUESS=nsx-tandem-nsk$UNAME_RELEASE + ;; *:NonStop-UX:*:*) - echo mips-compaq-nonstopux - exit ;; + GUESS=mips-compaq-nonstopux + ;; BS2000:POSIX*:*:*) - echo bs2000-siemens-sysv - exit ;; + GUESS=bs2000-siemens-sysv + ;; DS/*:UNIX_System_V:*:*) - echo ${UNAME_MACHINE}-${UNAME_SYSTEM}-${UNAME_RELEASE} - exit ;; + GUESS=$UNAME_MACHINE-$UNAME_SYSTEM-$UNAME_RELEASE + ;; *:Plan9:*:*) # "uname -m" is not consistent, so use $cputype instead. 386 # is converted to i386 for consistency with other x86 # operating systems. - if test "$cputype" = "386"; then + if test "${cputype-}" = 386; then UNAME_MACHINE=i386 - else - UNAME_MACHINE="$cputype" + elif test "x${cputype-}" != x; then + UNAME_MACHINE=$cputype fi - echo ${UNAME_MACHINE}-unknown-plan9 - exit ;; + GUESS=$UNAME_MACHINE-unknown-plan9 + ;; *:TOPS-10:*:*) - echo pdp10-unknown-tops10 - exit ;; + GUESS=pdp10-unknown-tops10 + ;; *:TENEX:*:*) - echo pdp10-unknown-tenex - exit ;; + GUESS=pdp10-unknown-tenex + ;; KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*) - echo pdp10-dec-tops20 - exit ;; + GUESS=pdp10-dec-tops20 + ;; XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*) - echo pdp10-xkl-tops20 - exit ;; + GUESS=pdp10-xkl-tops20 + ;; *:TOPS-20:*:*) - echo pdp10-unknown-tops20 - exit ;; + GUESS=pdp10-unknown-tops20 + ;; *:ITS:*:*) - echo pdp10-unknown-its - exit ;; + GUESS=pdp10-unknown-its + ;; SEI:*:*:SEIUX) - echo mips-sei-seiux${UNAME_RELEASE} - exit ;; + GUESS=mips-sei-seiux$UNAME_RELEASE + ;; *:DragonFly:*:*) - echo ${UNAME_MACHINE}-unknown-dragonfly`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` - exit ;; + DRAGONFLY_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'` + GUESS=$UNAME_MACHINE-unknown-dragonfly$DRAGONFLY_REL + ;; *:*VMS:*:*) UNAME_MACHINE=`(uname -p) 2>/dev/null` - case "${UNAME_MACHINE}" in - A*) echo alpha-dec-vms ; exit ;; - I*) echo ia64-dec-vms ; exit ;; - V*) echo vax-dec-vms ; exit ;; + case $UNAME_MACHINE in + A*) GUESS=alpha-dec-vms ;; + I*) GUESS=ia64-dec-vms ;; + V*) GUESS=vax-dec-vms ;; esac ;; *:XENIX:*:SysV) - echo i386-pc-xenix - exit ;; + GUESS=i386-pc-xenix + ;; i*86:skyos:*:*) - echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//' - exit ;; + SKYOS_REL=`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'` + GUESS=$UNAME_MACHINE-pc-skyos$SKYOS_REL + ;; i*86:rdos:*:*) - echo ${UNAME_MACHINE}-pc-rdos - exit ;; - i*86:AROS:*:*) - echo ${UNAME_MACHINE}-pc-aros - exit ;; + GUESS=$UNAME_MACHINE-pc-rdos + ;; + i*86:Fiwix:*:*) + GUESS=$UNAME_MACHINE-pc-fiwix + ;; + *:AROS:*:*) + GUESS=$UNAME_MACHINE-unknown-aros + ;; x86_64:VMkernel:*:*) - echo ${UNAME_MACHINE}-unknown-esx - exit ;; + GUESS=$UNAME_MACHINE-unknown-esx + ;; + amd64:Isilon\ OneFS:*:*) + GUESS=x86_64-unknown-onefs + ;; + *:Unleashed:*:*) + GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE + ;; esac -eval $set_cc_for_build -cat >$dummy.c < "$dummy.c" < -# include +#include +#include +#endif +#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__) +#if defined (vax) || defined (__vax) || defined (__vax__) || defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__) +#include +#if defined(_SIZE_T_) || defined(SIGLOST) +#include +#endif +#endif #endif main () { @@ -1378,20 +1627,12 @@ main () #include printf ("m68k-sony-newsos%s\n", #ifdef NEWSOS4 - "4" + "4" #else - "" -#endif - ); exit (0); + "" #endif + ); exit (0); #endif - -#if defined (__arm) && defined (__acorn) && defined (__unix) - printf ("arm-acorn-riscix\n"); exit (0); -#endif - -#if defined (hp300) && !defined (hpux) - printf ("m68k-hp-bsd\n"); exit (0); #endif #if defined (NeXT) @@ -1433,39 +1674,54 @@ main () #endif #if defined (_SEQUENT_) - struct utsname un; - - uname(&un); - - if (strncmp(un.version, "V2", 2) == 0) { - printf ("i386-sequent-ptx2\n"); exit (0); - } - if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */ - printf ("i386-sequent-ptx1\n"); exit (0); - } - printf ("i386-sequent-ptx\n"); exit (0); + struct utsname un; + uname(&un); + if (strncmp(un.version, "V2", 2) == 0) { + printf ("i386-sequent-ptx2\n"); exit (0); + } + if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */ + printf ("i386-sequent-ptx1\n"); exit (0); + } + printf ("i386-sequent-ptx\n"); exit (0); #endif #if defined (vax) -# if !defined (ultrix) -# include -# if defined (BSD) -# if BSD == 43 - printf ("vax-dec-bsd4.3\n"); exit (0); -# else -# if BSD == 199006 - printf ("vax-dec-bsd4.3reno\n"); exit (0); -# else - printf ("vax-dec-bsd\n"); exit (0); -# endif -# endif -# else - printf ("vax-dec-bsd\n"); exit (0); -# endif -# else - printf ("vax-dec-ultrix\n"); exit (0); -# endif +#if !defined (ultrix) +#include +#if defined (BSD) +#if BSD == 43 + printf ("vax-dec-bsd4.3\n"); exit (0); +#else +#if BSD == 199006 + printf ("vax-dec-bsd4.3reno\n"); exit (0); +#else + printf ("vax-dec-bsd\n"); exit (0); +#endif +#endif +#else + printf ("vax-dec-bsd\n"); exit (0); +#endif +#else +#if defined(_SIZE_T_) || defined(SIGLOST) + struct utsname un; + uname (&un); + printf ("vax-dec-ultrix%s\n", un.release); exit (0); +#else + printf ("vax-dec-ultrix\n"); exit (0); +#endif +#endif +#endif +#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__) +#if defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__) +#if defined(_SIZE_T_) || defined(SIGLOST) + struct utsname *un; + uname (&un); + printf ("mips-dec-ultrix%s\n", un.release); exit (0); +#else + printf ("mips-dec-ultrix\n"); exit (0); +#endif +#endif #endif #if defined (alliant) && defined (i860) @@ -1476,54 +1732,46 @@ main () } EOF -$CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null && SYSTEM_NAME=`$dummy` && +$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=`"$dummy"` && { echo "$SYSTEM_NAME"; exit; } # Apollos put the system type in the environment. +test -d /usr/apollo && { echo "$ISP-apollo-$SYSTYPE"; exit; } -test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit; } +echo "$0: unable to guess system type" >&2 -# Convex versions that predate uname can use getsysinfo(1) +case $UNAME_MACHINE:$UNAME_SYSTEM in + mips:Linux | mips64:Linux) + # If we got here on MIPS GNU/Linux, output extra information. + cat >&2 <&2 < in order to provide the needed -information to handle your system. +our_year=`echo $timestamp | sed 's,-.*,,'` +thisyear=`date +%Y` +# shellcheck disable=SC2003 +script_age=`expr "$thisyear" - "$our_year"` +if test "$script_age" -lt 3 ; then + cat >&2 </dev/null` /usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null` /usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null` -UNAME_MACHINE = ${UNAME_MACHINE} -UNAME_RELEASE = ${UNAME_RELEASE} -UNAME_SYSTEM = ${UNAME_SYSTEM} -UNAME_VERSION = ${UNAME_VERSION} +UNAME_MACHINE = "$UNAME_MACHINE" +UNAME_RELEASE = "$UNAME_RELEASE" +UNAME_SYSTEM = "$UNAME_SYSTEM" +UNAME_VERSION = "$UNAME_VERSION" EOF +fi exit 1 # Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) +# eval: (add-hook 'before-save-hook 'time-stamp) # time-stamp-start: "timestamp='" # time-stamp-format: "%:y-%02m-%02d" # time-stamp-end: "'" diff --git a/build/config.mk b/build/config.mk index 0a720600..22fd4ada 100644 --- a/build/config.mk +++ b/build/config.mk @@ -1,7 +1,7 @@ # we need this line or else default 'make' behavior will only generate host-config.mk do-make-all: all -$(TOP)/build/host-config.mk: +$(TOP)/build/host-config.mk: $(TOP)/build/config.guess @(host_triple=`$(TOP)/build/config.guess`; \ echo HOST_TRIPLE:=$$host_triple > $@; \ echo $$host_triple | awk '{split($$0,a,"-"); print "HOST_CPU:=" a[1] "\nHOST_VENDOR:=" a[2] "\nHOST_OS:=" a[3] "\n"}' >> $@) diff --git a/lib/triple.js b/lib/triple.js index 05a71766..39e6347d 100644 --- a/lib/triple.js +++ b/lib/triple.js @@ -19,6 +19,7 @@ export class Triple { case "x86": case "arm": case "arm64": + case "aarch64": return true; default: throw new Error(`unknown endianness for arch: ${this.arch}`); @@ -29,6 +30,7 @@ export class Triple { switch (this.arch) { case "x86_64": case "arm64": + case "aarch64": return 64; case "x86": case "arm": @@ -37,7 +39,7 @@ export class Triple { throw new Error(`unknown pointer size for arch: ${this.arch}`); } } - + llcArch() { switch (this.arch) { case "x86_64": @@ -46,6 +48,8 @@ export class Triple { return "x86"; case "arm64": return "arm64"; + case "aarch64": + return "aarch64"; case "arm": return "arm"; default: @@ -59,6 +63,8 @@ export class Triple { return "x86_64"; case "x86": return "i386"; + case "aarch64": + return "aarch64"; case "arm64": return "arm64"; case "arm": @@ -71,6 +77,7 @@ export class Triple { abi() { switch (this.arch) { case "x86_64": + case "aarch64": case "arm64": return new ABI(); case "x86": @@ -82,7 +89,7 @@ export class Triple { } static fromProcess() { - let vendor = "unknown";; + let vendor = "unknown"; let arch = os.arch(); if (arch === "x64") arch = "x86_64"; From bd8a1af11c97ac854596f0a166451889572e82f8 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 8 Oct 2023 14:55:32 -0700 Subject: [PATCH 002/146] a bunch of runtime clang analyze fixes --- runtime/ejs-array.c | 4 +++- runtime/ejs-exception.c | 2 +- runtime/ejs-gc.c | 8 +++++++- runtime/ejs-object.c | 3 --- runtime/ejs-promise.c | 10 ++++++---- runtime/ejs-proxy.c | 2 ++ runtime/ejs-symbol.c | 2 ++ 7 files changed, 21 insertions(+), 10 deletions(-) diff --git a/runtime/ejs-array.c b/runtime/ejs-array.c index 3f93b824..d285f499 100644 --- a/runtime/ejs-array.c +++ b/runtime/ejs-array.c @@ -1474,7 +1474,9 @@ static EJS_NATIVE_FUNC(_ejs_Array_prototype_reduceRight) { k--; } // c. If kPresent is false, throw a TypeError exception. - _ejs_throw_nativeerror_utf8 (EJS_TYPE_ERROR, "Reduce right of empty array with no initial value"); + if (!kPresent) { + _ejs_throw_nativeerror_utf8 (EJS_TYPE_ERROR, "Reduce right of empty array with no initial value"); + } } // 10. Repeat, while k ≥ 0 while (k >= 0) { diff --git a/runtime/ejs-exception.c b/runtime/ejs-exception.c index 363dc141..223d42ac 100644 --- a/runtime/ejs-exception.c +++ b/runtime/ejs-exception.c @@ -367,7 +367,7 @@ static intptr_t read_sleb(uintptr_t *pp) shift += 7; } while (byte & 0x80); if ((shift < 8*sizeof(intptr_t)) && (byte & 0x40)) { - result |= ((intptr_t)-1) << shift; + result |= ((uintptr_t)-1) << shift; } return result; } diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index def1e93a..0fdc4396 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -845,8 +845,10 @@ static int num_primsym_allocs = 0; static void sweep_heap() { +#if spew int pages_visited = 0; int pages_skipped = 0; +#endif // sweep the entire heap, freeing white nodes for (int a = 0, e = num_arenas; a < e; a ++) { @@ -859,10 +861,14 @@ sweep_heap() PageInfo *info = arena->page_infos[p]; if (info->num_free_cells == info->num_cells) { +#if spew pages_skipped++; +#endif } else { +#if spew pages_visited ++; +#endif for (int c = 0, ce = info->num_cells; c < ce; c ++) { BitmapCell cell = info->page_bitmap[c]; @@ -1005,7 +1011,7 @@ static void mark_generator_stacks() { for (int i = 0; i < generator_count; i++) { - EJSGenerator* gen = generators[i]; + // EJSGenerator* gen = generators[i]; // XXX mark the actual stack } diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 467488d1..1426529a 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -1150,8 +1150,6 @@ static EJS_NATIVE_FUNC(_ejs_Object_assign) { // 2. ReturnIfAbrupt(to). ejsval to = ToObject(target); - EJSObject* to_ = EJSVAL_TO_OBJECT(to); - // 3. If fewer than two arguments were passed,then return to. if (argc < 2) return to; @@ -1280,7 +1278,6 @@ static EJS_NATIVE_FUNC(_ejs_Object_defineProperty) { free (utf8_name); _ejs_throw_nativeerror_utf8 (EJS_TYPE_ERROR, msg); } - EJSObject *obj = EJSVAL_TO_OBJECT(O); // 2. Let key be ToPropertyKey(P). // 3. ReturnIfAbrupt(key). diff --git a/runtime/ejs-promise.c b/runtime/ejs-promise.c index 53ebdcbd..cdf92b86 100644 --- a/runtime/ejs-promise.c +++ b/runtime/ejs-promise.c @@ -412,14 +412,14 @@ PromiseReactionTask (EJSPromiseReaction* reaction, ejsval argument) handlerResult = argument; } // 5. Else If handler is "Thrower", then let handlerResult be Completion{[[type]]: throw, [[value]]: argument, [[target]]: empty}. - if (SameValue(handler, _ejs_thrower_function)) { + else if (SameValue(handler, _ejs_thrower_function)) { success = EJS_FALSE; handlerResult = argument; } // 6. Else, Let let handlerResult be the result of calling the [[Call]] internal method of handler passing undefined as thisArgument and (argument) as argumentsList. else { ejsval undef_this = _ejs_undefined; - success = _ejs_invoke_closure_catch(&handlerResult, handler, &undef_this, 1, &argument, _ejs_undefined); + success = _ejs_invoke_closure_catch(&handlerResult, handler, &undef_this, 1, &argument, _ejs_undefined); } ejsval status; @@ -428,7 +428,7 @@ PromiseReactionTask (EJSPromiseReaction* reaction, ejsval argument) if (!success) { ejsval undef_this = _ejs_undefined; // a. Let status be the result of calling the [[Call]] internal method of promiseCapability.[[Reject]] passing undefined as thisArgument and (handlerResult.[[value]]) as argumentsList. - success = _ejs_invoke_closure_catch(&status, EJS_CAPABILITY_GET_REJECT(promiseCapability), &undef_this, 1, &handlerResult, _ejs_undefined); + /* notyet success = */ _ejs_invoke_closure_catch(&status, EJS_CAPABILITY_GET_REJECT(promiseCapability), &undef_this, 1, &handlerResult, _ejs_undefined); // b. NextTask status. return;//EJS_NOT_IMPLEMENTED(); @@ -436,7 +436,7 @@ PromiseReactionTask (EJSPromiseReaction* reaction, ejsval argument) // 8. Let handlerResult be handlerResult.[[value]]. // 9. Let status be the result of calling the [[Call]] internal method of promiseCapability.[[Resolve]] passing undefined as thisArgument and (handlerResult) as argumentsList. ejsval undef_this = _ejs_undefined; - success = _ejs_invoke_closure_catch(&status, EJS_CAPABILITY_GET_RESOLVE(promiseCapability), &undef_this, 1, &handlerResult, _ejs_undefined); + /* notyet success = */ _ejs_invoke_closure_catch(&status, EJS_CAPABILITY_GET_RESOLVE(promiseCapability), &undef_this, 1, &handlerResult, _ejs_undefined); // 10. NextTask status. } @@ -638,6 +638,7 @@ static EJS_NATIVE_FUNC(resolve_element) { // 2. Set the value of F's [[AlreadyCalled]] internal slot to true. EJS_RESOLVEELEMENT_SET_ALREADY_CALLED(env, _ejs_true); +#if notyet // 3. Let index be the value of F's [[Index]] internal slot. ejsval index = EJS_RESOLVEELEMENT_GET_INDEX(env); @@ -646,6 +647,7 @@ static EJS_NATIVE_FUNC(resolve_element) { // 5. Let promiseCapability be the value of F's [[Capabilities]] internal slot. ejsval promiseCapability = EJS_RESOLVEELEMENT_GET_CAPABILITIES(env); +#endif // 6. Let remainingElementsCount be the value of F's [[RemainingElements]] internal slot. diff --git a/runtime/ejs-proxy.c b/runtime/ejs-proxy.c index e286aa99..d515f48b 100644 --- a/runtime/ejs-proxy.c +++ b/runtime/ejs-proxy.c @@ -428,7 +428,9 @@ _ejs_proxy_specop_get_own_property (ejsval O, ejsval P, ejsval* exc) // 14. Let extensibleTarget be IsExtensible(target). // 15. ReturnIfAbrupt(extensibleTarget). +#if notyet EJSBool extensibleTarget = EJS_OBJECT_IS_EXTENSIBLE(_target); +#endif // 16. Let resultDesc be ToPropertyDescriptor(trapResultObj). // 17. ReturnIfAbrupt(resultDesc). diff --git a/runtime/ejs-symbol.c b/runtime/ejs-symbol.c index 4fe326b7..536ead1d 100644 --- a/runtime/ejs-symbol.c +++ b/runtime/ejs-symbol.c @@ -11,12 +11,14 @@ // ECMA262: 19.4.2.2 Symbol.for ( key ) static EJS_NATIVE_FUNC(_ejs_Symbol_for) { +#if notyet ejsval key = _ejs_undefined; if (argc > 0) key = args[0]; // 1. Let stringKey be ToString(key). // 2. ReturnIfAbrupt(stringKey). ejsval stringKey = ToString(key); +#endif // 3. For each element e of the GlobalSymbolRegistry List, // a. If SameValue(e.[[key]], stringKey) is true, then return e.[[symbol]]. From 2107e33e98937fac598e9fa5cfaa7aba52dc0563 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 8 Oct 2023 19:25:27 -0700 Subject: [PATCH 003/146] more build cruft --- build/config.mk | 28 ++++------ ejs-es6.js | 120 +++++++++++++++++++++---------------------- node-compat/Makefile | 6 ++- runtime/Makefile | 80 ++++++++++++++++------------- 4 files changed, 117 insertions(+), 117 deletions(-) diff --git a/build/config.mk b/build/config.mk index 22fd4ada..96cdbf2a 100644 --- a/build/config.mk +++ b/build/config.mk @@ -37,7 +37,7 @@ CXX?=clang++ CFLAGS=-g -O0 -Wall -I. -Wno-unused-function -Wno-unused-variable -MIN_IOS_VERSION=8.0 +MIN_IOS_VERSION=17.0 MIN_OSX_VERSION=10.10 DEVELOPER_ROOT?=/Applications/Xcode.app/Contents/Developer @@ -58,36 +58,28 @@ LINUX_CFLAGS=$(CFLAGS) -DTARGET_CPU_X86=1 -DEJS_BITS_PER_WORD=32 -DIS_LITTLE_END endif OSX_ARCH=-arch aarch64 -OSX_MTRIPLE="arm64-apple-macosx(MIN_OSX_VERSION).0" +OSX_TRIPLE=arm64-apple-darwin +OSX_MTRIPLE="arm64-apple-macosx$(MIN_OSX_VERSION).0" OSX_CFLAGS=$(CFLAGS) -DOSX=1 -DTARGET_CPU_AARCH64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -D_XOPEN_SOURCE -Wno-deprecated-declarations -IOSSIM_ARCH=-arch x86_64 -IOSSIM_TRIPLE=x86_64-apple-darwin +IOSSIM_ARCH=-arch arm64 +IOSSIM_TRIPLE=arm64-apple-ios-simulator IOSSIM_MTRIPLE="x86_64-apple-ios$(MIN_IOS_VERSION).0" -IOSSIM_ARCH_FLAGS=-DTARGET_CPU_X86=1 -DEJS_BITS_PER_WORD=32 -DIS_LITTLE_ENDIAN=1 +IOSSIM_ARCH_FLAGS=-DTARGET_CPU_AARCH64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 IOSSIM_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneSimulator.platform/Developer IOSSIM_BIN=$(IOSSIM_ROOT)/usr/bin IOSSIM_SYSROOT=$(IOSSIM_ROOT)/SDKs/iPhoneSimulator$(IOS_SDK_VERSION).sdk -IOSDEV_ARCH=-arch armv7 -IOSDEV_TRIPLE=armv7-apple-darwin -IOSDEV_MTRIPLE="thumbv7-apple-ios$(MIN_IOS_VERSION).0" -IOSDEV_ARCH_FLAGS=-mthumb -DTARGET_CPU_ARM=1 -DEJS_BITS_PER_WORD=32 -DIS_LITTLE_ENDIAN=1 +IOSDEV_ARCH=-arch aarch64 +IOSDEV_TRIPLE=arm64-apple-ios +IOSDEV_MTRIPLE="arm64-apple-ios$(MIN_IOS_VERSION).0" +IOSDEV_ARCH_FLAGS=-DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 IOSDEV_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneOS.platform/Developer IOSDEV_BIN=$(IOSDEV_ROOT)/usr/bin IOSDEV_SYSROOT=$(IOSDEV_ROOT)/SDKs/iPhoneOS$(IOS_SDK_VERSION).sdk -IOSDEVS_ARCH=-arch armv7s -IOSDEVS_TRIPLE=armv7s-apple-darwin -IOSDEVS_MTRIPLE="thumbv7s-apple-ios$(MIN_IOS_VERSION).0" -IOSDEVS_ARCH_FLAGS=-mthumb -DTARGET_CPU_ARM=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -IOSDEVS_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneOS.platform/Developer -IOSDEVS_BIN=$(IOSDEV_ROOT)/usr/bin -IOSDEVS_SYSROOT=$(IOSDEV_ROOT)/SDKs/iPhoneOS$(IOS_SDK_VERSION).sdk - IOSSIM_CFLAGS=$(IOSSIM_ARCH) $(IOSSIM_ARCH_FLAGS) $(CFLAGS) -DIOS=1 -isysroot $(IOSSIM_SYSROOT) -miphoneos-version-min=$(MIN_IOS_VERSION) -D_XOPEN_SOURCE -Wno-deprecated-declarations IOSDEV_CFLAGS=$(IOSDEV_ARCH) $(IOSDEV_ARCH_FLAGS) $(CFLAGS) -DIOS=1 -isysroot $(IOSDEV_SYSROOT) -miphoneos-version-min=$(MIN_IOS_VERSION) -D_XOPEN_SOURCE -Wno-deprecated-declarations -IOSDEVS_CFLAGS=$(IOSDEVS_ARCH) $(IOSDEVS_ARCH_FLAGS) $(CFLAGS) -DIOS=1 -isysroot $(IOSDEVS_SYSROOT) -miphoneos-version-min=$(MIN_IOS_VERSION) -D_XOPEN_SOURCE -Wno-deprecated-declarations # directories used during make install prefix?=/usr/local diff --git a/ejs-es6.js b/ejs-es6.js index 3ce490ff..8810dd9c 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -117,11 +117,19 @@ function add_native_module_dir(dir) { function set_target(str) { let triple; - switch(str) { - case "linux_x86_64": triple = new Triple("x86_64", "unknown", "linux"); break; - case "macos": triple = new Triple("arm64", "apple", "darwin"); break; - case "iossim": triple = new Triple("arm64", "apple", "darwin"); break; - case "iosdev": triple = new Triple("arm64", "apple", "darwin"); break; + switch (str) { + case "linux_x86_64": + triple = new Triple("x86_64", "unknown", "linux"); + break; + case "macos": + triple = new Triple("arm64", "apple", "darwin"); + break; + case "iossim": + triple = new Triple("arm64", "apple", "darwin"); + break; + case "iosdev": + triple = new Triple("arm64", "apple", "darwin"); + break; default: triple = Triple.fromString(str); break; @@ -296,9 +304,7 @@ if (!file_args || file_args.length === 0) { } if (!options.quiet) { - console.log( - `host: ${host_triple}, target: ${target_triple}` - ); + console.log(`host: ${host_triple}, target: ${target_triple}`); } debug.setLevel(options.debug_level); @@ -316,39 +322,37 @@ let dev_bin = `${dev_base}/Developer/usr/bin`; function target_llc_args(triple) { let args = [`-march=${triple.llcArch()}`]; switch (triple.os) { - case "darwin": - switch (triple.arch) { - case "arm": - args = args.concat([ - `-mtriple=thumbv7-apple-ios${options.ios_min}.0`, - "-mattr=+v6", - "--relocation-model=pic", - "-soft-float", - ]); - break; - case "arm64": - args = args.concat([ - `-mtriple=arm64-apple-macosx${options.osx_min}.0`, - "-mattr=+fp-armv8", - "--relocation-model=pic", - ]); - break; - case "x86": - args = args.concat([ - `-mtriple=i386-apple-ios${options.ios_min}.0`, - "--relocation-model=pic", - ]); + case "darwin": + switch (triple.arch) { + case "arm": + args = args.concat([ + `-mtriple=thumbv7-apple-ios${options.ios_min}.0`, + "-mattr=+v6", + "--relocation-model=pic", + "-soft-float", + ]); + break; + case "arm64": + args = args.concat([ + `-mtriple=arm64-apple-macosx${options.osx_min}.0`, + "-mattr=+fp-armv8", + "--relocation-model=pic", + ]); + break; + case "x86": + args = args.concat([ + `-mtriple=i386-apple-ios${options.ios_min}.0`, + "--relocation-model=pic", + ]); + break; + case "x86_64": + args = args.concat([`-mtriple=x86_64-apple-macosx${options.osx_min}.0`]); + break; + } break; - case "x86_64": - args = args.concat([`-mtriple=x86_64-apple-macosx${options.osx_min}.0`]); + case "linux": + args = args.concat(["--relocation-model=pic"]); break; - } - break; - case "linux": - args = args.concat([ - "--relocation-model=pic" - ]) - break; } return args; @@ -394,7 +398,8 @@ function target_libraries(triple) { let rv = ["-framework", "Foundation"]; // for macos we only need Foundation and AppKit - if (triple.arch === "x86_64" || triple.arch === "arm64") return rv.concat(["-framework", "AppKit"]); + if (triple.arch === "x86_64" || triple.arch === "arm64") + return rv.concat(["-framework", "AppKit"]); // for any other darwin we're dealing with ios, so... return rv.concat([ @@ -413,15 +418,7 @@ function target_libraries(triple) { function target_libecho(triple) { if (options.srcdir) { - if (triple.os === "darwin") { - if (triple.arch === "x86_64" || triple.arch === "arm64") return "runtime/libecho.a"; - if (triple.arch === "x86") return "runtime/libecho.a.sim"; - if (triple.arch === "arm") return "runtime/libecho.a.armv7"; - - throw new Error("no libecho for this platform"); - } - - return "runtime/libecho.a"; + return path.join("runtime", "out", `${triple}`, "libecho.a"); } else { return path.join(relative_to_ejs_exe(`../lib/${triple.arch}-${triple.os}`), "libecho.a"); } @@ -497,7 +494,14 @@ function compileFile(filename, parse_tree, modules, files_count, cur_file, compi let compiled_module; try { - compiled_module = compile(parse_tree, base_filename, filename, modules, options, target_triple); + compiled_module = compile( + parse_tree, + base_filename, + filename, + modules, + options, + target_triple + ); } catch (e) { console.warn(`${e}`); if (options.debug_level == 0) process.exit(-1); @@ -505,9 +509,7 @@ function compileFile(filename, parse_tree, modules, files_count, cur_file, compi } function tmpfile(suffix) { - return `${os.tmpdir()}/${base_filename}-${target_triple.arch}-${ - target_triple.os - }${suffix}`; + return `${os.tmpdir()}/${base_filename}-${target_triple.arch}-${target_triple.os}${suffix}`; } let ll_filename = tmpfile(".ll"); let bc_filename = tmpfile(".bc"); @@ -648,9 +650,7 @@ function do_final_link(main_file, modules) { let map_filename = generate_import_map(js_modules, native_modules); - process.env.PATH = `${target_path_prepend(target_triple)}:${ - process.env.PATH - }`; + process.env.PATH = `${target_path_prepend(target_triple)}:${process.env.PATH}`; let output_filename = options.output_filename || `${main_file}.exe`; let clang_args = target_link_args(target_triple).concat( @@ -664,12 +664,8 @@ function do_final_link(main_file, modules) { clang_args.push(map_filename); - clang_args = clang_args.concat( - relative_to_ejs_exe(target_libecho(target_triple)) - ); - clang_args = clang_args.concat( - relative_to_ejs_exe(target_extra_libs(target_triple)) - ); + clang_args = clang_args.concat(relative_to_ejs_exe(target_libecho(target_triple))); + clang_args = clang_args.concat(relative_to_ejs_exe(target_extra_libs(target_triple))); let seen_native_modules = new Set(); native_modules.forEach((module) => { diff --git a/node-compat/Makefile b/node-compat/Makefile index cff22771..f44012f6 100644 --- a/node-compat/Makefile +++ b/node-compat/Makefile @@ -53,8 +53,10 @@ ALL_LIBRARIES=$(OSX_LIBRARY) ALL_TARGETS=$(ALL_LIBRARIES) else # on local builds we build all the libraries (XXX need to figure out how to accurately target those platforms first) -ALL_LIBRARIES=$(OSX_LIBRARY) $(SIM_LIBRARY) $(DEV_LIBRARY) $(DEVS_LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) $(analyze_plists_c) $(analyze_plists_objc) +#ALL_LIBRARIES=$(OSX_LIBRARY) $(SIM_LIBRARY) $(DEV_LIBRARY) $(DEVS_LIBRARY) +#ALL_TARGETS=$(ALL_LIBRARIES) $(analyze_plists_c) $(analyze_plists_objc) +ALL_LIBRARIES=$(OSX_LIBRARY) +ALL_TARGETS=$(ALL_LIBRARIES) endif ALL_OBJECTS=$(SIM_OBJECTS) $(DEV_OBJECTS) $(DEVS_OBJECTS) $(OSX_OBJECTS) diff --git a/runtime/Makefile b/runtime/Makefile index bf0d2eff..d65f9c36 100644 --- a/runtime/Makefile +++ b/runtime/Makefile @@ -40,6 +40,7 @@ C_SOURCES= \ ejs-uri.c \ ejs-weakmap.c \ ejs-weakset.c \ + main.c \ parson.c CPP_SOURCES= \ @@ -62,7 +63,7 @@ RUNLOOP_DEF=-DHAVE_LIBUV=1 RUNLOOP_C_SOURCE=ejs-runloop-libuv.c endif -LINUX_OBJECTS=$(C_SOURCES:%.c=%.o.linux) $(CPP_SOURCES:%.cpp=%.o.linux) $(OBJC_SOURCES:%.m=%.o.linux) ejs-log.o.linux main.o.linux ejs-invoke-closure-catch.o.linux $(RUNLOOP_C_SOURCE:%.c=%.o.linux) +LINUX_OBJECTS=$(C_SOURCES:%.c=%.o.linux) $(CPP_SOURCES:%.cpp=%.o.linux) $(OBJC_SOURCES:%.m=%.o.linux) ejs-log.o.linux ejs-invoke-closure-catch.o.linux $(RUNLOOP_C_SOURCE:%.c=%.o.linux) ALL_OBJECTS=$(LINUX_OBJECTS) @@ -106,16 +107,15 @@ OBJC_SOURCES= \ ejs-xhr.m \ ejs-runloop-darwin.m -OSX_OBJECTS=$(C_SOURCES:%.c=%.o.osx) $(CPP_SOURCES:%.cpp=%.o.osx) $(OBJC_SOURCES:%.m=%.o.osx) ejs-invoke-closure-catch.o.osx main.o.osx -SIM_OBJECTS=$(C_SOURCES:%.c=%.o.sim) $(CPP_SOURCES:%.cpp=%.o.sim) $(OBJC_SOURCES:%.m=%.o.sim) ejs-invoke-closure-catch.o.sim main.o.sim -DEV_OBJECTS=$(C_SOURCES:%.c=%.o.armv7) $(CPP_SOURCES:%.cpp=%.o.armv7) $(OBJC_SOURCES:%.m=%.o.armv7) ejs-invoke-closure-catch-sret.o.armv7 main.o.armv7 -DEVS_OBJECTS=$(C_SOURCES:%.c=%.o.armv7s) $(CPP_SOURCES:%.cpp=%.o.armv7s) $(OBJC_SOURCES:%.m=%.o.armv7s) ejs-invoke-closure-catch.o.armv7s main.o.armv7s +OSX_OBJECTS=$(C_SOURCES:%.c=out/$(OSX_TRIPLE)/%.o) $(CPP_SOURCES:%.cpp=out/$(OSX_TRIPLE)/%.o) $(OBJC_SOURCES:%.m=out/$(OSX_TRIPLE)/%.o) out/$(OSX_TRIPLE)/ejs-invoke-closure-catch.o +SIM_OBJECTS=$(C_SOURCES:%.c=out/$(IOSSIM_TRIPLE)/%.o) $(CPP_SOURCES:%.cpp=out/$(IOSSIM_TRIPLE)/%.o) $(OBJC_SOURCES:%.m=out/$(IOSSIM_TRIPLE)/%.o) out/$(IOSSIM_TRIPLE)/ejs-invoke-closure-catch.o +DEV_OBJECTS=$(C_SOURCES:%.c=out/$(IOSDEV_TRIPLE)%.o) $(CPP_SOURCES:%.cpp=out/$(IOSDEV_TRIPLE)%.o) $(OBJC_SOURCES:%.m=out/$(IOSDEV_TRIPLE)%.o) out/$(IOSDEV_TRIPLE)/ejs-invoke-closure-catch.o -analyze_plists_c = $(C_SOURCES:%.c=%.plist) main.plist +analyze_plists_c = $(C_SOURCES:%.c=%.plist) analyze_plists_objc = $(OBJC_SOURCES:%.m=%.plist) -OSX_LIBRARY=$(LIBRARY) -SIM_LIBRARY=$(LIBRARY).sim +OSX_LIBRARY=out/$(OSX_TRIPLE)/$(LIBRARY) +SIM_LIBRARY=out/$(IOSSIM_TRIPLE)/$(LIBRARY) DEV_LIBRARY=$(LIBRARY).armv7 DEVS_LIBRARY=$(LIBRARY).armv7s @@ -125,7 +125,7 @@ ALL_LIBRARIES=$(OSX_LIBRARY) ALL_TARGETS=$(ALL_LIBRARIES) else # on local builds we build all the libraries (XXX need to figure out how to accurately target those platforms first) -ALL_LIBRARIES=$(OSX_LIBRARY) +ALL_LIBRARIES=$(OSX_LIBRARY) $(SIM_LIBRARY) ALL_TARGETS=$(ALL_LIBRARIES) $(analyze_plists_c) $(analyze_plists_objc) endif @@ -137,10 +137,10 @@ IOSDEV_CFLAGS += -I../external-deps/pcre-iosdev -I../external-deps/double-conver $(OSX_LIBRARY): $(OSX_OBJECTS) - @echo [ar osx] $@ && /usr/bin/ar rc $@ $(OSX_OBJECTS) + @echo [ar osx] `basename $@` && /usr/bin/ar rc $@ $(OSX_OBJECTS) $(SIM_LIBRARY): $(SIM_OBJECTS) - @echo [ar sim] $@ && /usr/bin/ar rc $@ $(SIM_OBJECTS) + @echo [ar sim] `basename $@` && /usr/bin/ar rc $@ $(SIM_OBJECTS) $(DEV_LIBRARY): $(DEV_OBJECTS) @echo [ar armv7] $@ && /usr/bin/ar rc $@ $(DEV_OBJECTS) @@ -148,50 +148,60 @@ $(DEV_LIBRARY): $(DEV_OBJECTS) $(DEVS_LIBRARY): $(DEVS_OBJECTS) @echo [ar armv7s] $@ && /usr/bin/ar rc $@ $(DEVS_OBJECTS) -ejs-init.o.osx ejs-init.o.sim ejs-init.o.armv7 ejs-init.o.armv7s: ejs-atoms-gen.c +out/$(OSX_TRIPLE)/ejs-init.o ejs-init.o.sim ejs-init.o.armv7 ejs-init.o.armv7s: ejs-atoms-gen.c ejs-webgl-constants-sorted.h: ejs-webgl-constants.h @echo [GEN] $@ && (grep WEBGL_CONSTANT $< | sort > $@) -ejs-webgl.o.osx ejs-webgl.o.sim ejs-webgl.o.armv7 ejs-webgl.o.armv7s: ejs-webgl-constants-sorted.h +out/$(OSX_TRIPLE)/ejs-webgl.o ejs-webgl.o.sim ejs-webgl.o.armv7 ejs-webgl.o.armv7s: ejs-webgl-constants-sorted.h OBJC_FLAGS= -ObjC -DOBJC=1 -fobjc-abi-version=2 -fobjc-legacy-dispatch -fno-objc-arc -%.o.osx: %.c - @mkdir -p .deps - @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.osx,,`/$@/ > .deps/$@-deps +out/$(OSX_TRIPLE)/%.o: %.c + @mkdir -p .deps/out/$(OSX_TRIPLE) + @mkdir -p out/$(OSX_TRIPLE) + @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps @echo [$(CC) osx] $< && $(CC) -ObjC $(OSX_CFLAGS) -c -o $@ $< -%.o.osx: %.cpp - @mkdir -p .deps - @$(CXX) -MM $(OSX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.osx,,`/$@/ > .deps/$@-deps +out/$(OSX_TRIPLE)/%.o: %.cpp + @mkdir -p .deps/out/$(OSX_TRIPLE) + @mkdir -p out/$(OSX_TRIPLE) + @$(CXX) -MM $(OSX_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps @echo [$(CXX) osx] $< && $(CXX) -std=c++11 $(OSX_CFLAGS) -c -o $@ $< -%.o.osx: %.m - @mkdir -p .deps - @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.osx,,`/$@/ > .deps/$@-deps +out/$(OSX_TRIPLE)/%.o: %.m + @mkdir -p .deps/out/$(OSX_TRIPLE) + @mkdir -p out/$(OSX_TRIPLE) + @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps @echo [$(CC) osx] $< && $(CC) $(OSX_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< -%.o.osx: %.ll +out/$(OSX_TRIPLE)/%.o: %.ll + @mkdir -p .deps/out/$(OSX_TRIPLE) + @mkdir -p out/$(OSX_TRIPLE) @echo [llc osx] $< && llc$(LLVM_SUFFIX) -mtriple=$(OSX_MTRIPLE) -filetype=obj -o=$@ -O2 $< -%.o.sim: %.c - @mkdir -p .deps - @$(CC) -MM $(IOSSIM_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.sim,,`/$@/ > .deps/$@-deps +out/$(IOSSIM_TRIPLE)/%.o: %.c + @mkdir -p .deps/out/$(IOSSIM_TRIPLE) + @mkdir -p out/$(IOSSIM_TRIPLE) + @$(CC) -MM $(IOSSIM_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps @echo [$(CC) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CC) -ObjC $(IOSSIM_CFLAGS) -c -o $@ $< -%.o.sim: %.cpp - @mkdir -p .deps - @$(CXX) -MM $(IOSSIM_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.sim,,`/$@/ > .deps/$@-deps +out/$(IOSSIM_TRIPLE)/%.o: %.cpp + @mkdir -p .deps/out/$(IOSSIM_TRIPLE) + @mkdir -p out/$(IOSSIM_TRIPLE) + @$(CXX) -MM $(IOSSIM_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps @echo [$(CXX) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CXX) -std=c++11 $(IOSSIM_CFLAGS) -c -o $@ $< -%.o.sim: %.m - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSSIM_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.sim,,`/$@/ > .deps/$@-deps +out/$(IOSSIM_TRIPLE)/%.o: %.m + @mkdir -p .deps/out/$(IOSSIM_TRIPLE) + @mkdir -p out/$(IOSSIM_TRIPLE) + @$(CC) -MM -ObjC $(IOSSIM_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps @echo [$(CC) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CC) $(IOSSIM_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< -%.o.sim: %.ll +out/$(IOSSIM_TRIPLE)/%.o: %.ll + @mkdir -p .deps/out/$(IOSSIM_TRIPLE) + @mkdir -p out/$(IOSSIM_TRIPLE) @echo [llc sim] $< && llc$(LLVM_SUFFIX) -march=x86 -mtriple=$(IOSSIM_MTRIPLE) -filetype=obj -o=$@ -O2 $< %.o.armv7: %.c @@ -242,8 +252,8 @@ class-test: $(C_SOURCES:%.c=%.o.osx) $(OBJC_SOURCES:%.m=%.o.osx) class-test.o.os $(CC) -ObjC $(OSX_CFLAGS) -o $@ $(C_SOURCES:%.c=%.o.osx) $(OBJC_SOURCES:%.m=%.o.osx) class-test.o.osx ../external-deps/pcre-osx/.libs/libpcre16.a -framework Foundation -framework AppKit -lstdc++ --include $(patsubst %.o.osx,.deps/%.o.osx-deps,$(OSX_OBJECTS)) --include $(patsubst %.o.sim,.deps/%.o.sim-deps,$(SIM_OBJECTS)) +-include $(patsubst out/$(OSX_TRIPLE)/%.o,.deps/$(OSX_TRIPLE)/%.o-deps,$(OSX_OBJECTS)) +-include $(patsubst out/$(IOSSIM_TRIPLE)/%.o,.deps/$(IOSSIM_TRIPLE)/%.o-deps,$(IOSSIM_TRIPLE)) -include $(patsubst %.o.armv7,.deps/%.o.armv7-deps,$(DEV_OBJECTS)) -include $(patsubst %.o.armv7s,.deps/%.o.armv7s-deps,$(DEVS_OBJECTS)) endif From 4bbb0e2e36359315a6d4100cbaf7a08eb42bcd8c Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Mon, 9 Oct 2023 12:33:54 -0700 Subject: [PATCH 004/146] lots of build system/triple work --- build/config.mk | 37 ++-- build/iOS.cmake | 270 ++++++++++++------------ ejs-es6.js | 116 +++++----- ejs-llvm/ejs-llvm.ejs.in | 9 +- external-deps/Makefile | 52 ++--- lib/passes/gather-imports.js | 37 ++-- lib/triple.js | 44 +++- modules/objc_internal/objc_internal.ejs | 22 +- node-compat/node-compat.ejs | 54 ++++- runtime/Makefile | 199 ++++++----------- runtime/ejs-gc.c | 2 +- runtime/ejs-generator.c | 2 +- 12 files changed, 419 insertions(+), 425 deletions(-) diff --git a/build/config.mk b/build/config.mk index 96cdbf2a..d93c3150 100644 --- a/build/config.mk +++ b/build/config.mk @@ -49,29 +49,36 @@ else EJS_RUNLOOP_IMPL=darwin endif -ifeq ($(HOST_CPU),x86_64) LINUX_ARCH=-arch x86_64 +LINUX_CLANG_TRIPLE=x86_64-unknown-linux +LINUX_GNU_TRIPLE=x86_64-unknown-linux +LINUX_SHORT_TRIPLE=x86_64-linux LINUX_CFLAGS=$(CFLAGS) -DTARGET_CPU_AMD64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -D_GNU_SOURCE -else -LINUX_ARCH=-arch x86 -LINUX_CFLAGS=$(CFLAGS) -DTARGET_CPU_X86=1 -DEJS_BITS_PER_WORD=32 -DIS_LITTLE_ENDIAN=1 -D_GNU_SOURCE -endif - -OSX_ARCH=-arch aarch64 -OSX_TRIPLE=arm64-apple-darwin -OSX_MTRIPLE="arm64-apple-macosx$(MIN_OSX_VERSION).0" -OSX_CFLAGS=$(CFLAGS) -DOSX=1 -DTARGET_CPU_AARCH64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -D_XOPEN_SOURCE -Wno-deprecated-declarations -IOSSIM_ARCH=-arch arm64 -IOSSIM_TRIPLE=arm64-apple-ios-simulator +MACOS_MARCH=arm64 +MACOS_ARCH=-arch $(MACOS_MARCH) +MACOS_CLANG_TRIPLE=arm64-apple-macos +MACOS_GNU_TRIPLE=arm64-apple-darwin +MACOS_SHORT_TRIPLE=arm64-macos +MACOS_MTRIPLE="arm64-apple-macosx$(MIN_OSX_VERSION).0" +MACOS_CFLAGS=$(CFLAGS) -DOSX=1 -DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -D_XOPEN_SOURCE -Wno-deprecated-declarations + +IOSSIM_MARCH=arm64 +IOSSIM_ARCH=-arch $(IOSSIM_MARCH) +IOSSIM_CLANG_TRIPLE=arm64-apple-ios-simulator +IOSSIM_GNU_TRIPLE=aarch64-apple-iossimulator +IOSSIM_SHORT_TRIPLE=arm64-iossim IOSSIM_MTRIPLE="x86_64-apple-ios$(MIN_IOS_VERSION).0" -IOSSIM_ARCH_FLAGS=-DTARGET_CPU_AARCH64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 +IOSSIM_ARCH_FLAGS=-DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 IOSSIM_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneSimulator.platform/Developer IOSSIM_BIN=$(IOSSIM_ROOT)/usr/bin IOSSIM_SYSROOT=$(IOSSIM_ROOT)/SDKs/iPhoneSimulator$(IOS_SDK_VERSION).sdk -IOSDEV_ARCH=-arch aarch64 -IOSDEV_TRIPLE=arm64-apple-ios +IOSDEV_MARCH=arm64 +IOSDEV_ARCH=-arch $(IOSDEV_MARCH) +IOSDEV_CLANG_TRIPLE=arm64-apple-ios +IOSDEV_GNU_TRIPLE=aarch64-apple-ios +IOSDEV_SHORT_TRIPLE=arm64-ios IOSDEV_MTRIPLE="arm64-apple-ios$(MIN_IOS_VERSION).0" IOSDEV_ARCH_FLAGS=-DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 IOSDEV_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneOS.platform/Developer diff --git a/build/iOS.cmake b/build/iOS.cmake index 5fe64190..b248d1e8 100644 --- a/build/iOS.cmake +++ b/build/iOS.cmake @@ -5,209 +5,211 @@ # Options: # # IOS_PLATFORM = OS (default) or SIMULATOR or SIMULATOR64 -# This decides if SDKS will be selected from the iPhoneOS.platform or iPhoneSimulator.platform folders -# OS - the default, used to build for iPhone and iPad physical devices, which have an arm arch. -# SIMULATOR - used to build for the Simulator platforms, which have an x86 arch. +# This decides if SDKS will be selected from the iPhoneOS.platform or iPhoneSimulator.platform folders +# OS - the default, used to build for iPhone and iPad physical devices, which have an arm arch. +# SIMULATOR - used to build for the Simulator platforms, which have an x86 arch. # # CMAKE_IOS_DEVELOPER_ROOT = automatic(default) or /path/to/platform/Developer folder -# By default this location is automatcially chosen based on the IOS_PLATFORM value above. -# If set manually, it will override the default location and force the user of a particular Developer Platform +# By default this location is automatcially chosen based on the IOS_PLATFORM value above. +# If set manually, it will override the default location and force the user of a particular Developer Platform # # CMAKE_IOS_SDK_ROOT = automatic(default) or /path/to/platform/Developer/SDKs/SDK folder -# By default this location is automatcially chosen based on the CMAKE_IOS_DEVELOPER_ROOT value. -# In this case it will always be the most up-to-date SDK found in the CMAKE_IOS_DEVELOPER_ROOT path. -# If set manually, this will force the use of a specific SDK version +# By default this location is automatcially chosen based on the CMAKE_IOS_DEVELOPER_ROOT value. +# In this case it will always be the most up-to-date SDK found in the CMAKE_IOS_DEVELOPER_ROOT path. +# If set manually, this will force the use of a specific SDK version # Macros: # # set_xcode_property (TARGET XCODE_PROPERTY XCODE_VALUE) -# A convenience macro for setting xcode specific properties on targets -# example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1") +# A convenience macro for setting xcode specific properties on targets +# example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1") # # find_host_package (PROGRAM ARGS) -# A macro used to find executable programs on the host system, not within the iOS environment. -# Thanks to the android-cmake project for providing the command +# A macro used to find executable programs on the host system, not within the iOS environment. +# Thanks to the android-cmake project for providing the command # Standard settings -set (CMAKE_SYSTEM_NAME Darwin) -set (CMAKE_SYSTEM_VERSION 1) -set (UNIX True) -set (APPLE True) -set (IOS True) +set(CMAKE_SYSTEM_NAME Darwin) +set(CMAKE_SYSTEM_VERSION 1) +set(UNIX True) +set(APPLE True) +set(IOS True) # Required as of cmake 2.8.10 -set (CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING "Force unset of the deployment target for iOS" FORCE) +set(CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING "Force unset of the deployment target for iOS" FORCE) # Determine the cmake host system version so we know where to find the iOS SDKs -find_program (CMAKE_UNAME uname /bin /usr/bin /usr/local/bin) -if (CMAKE_UNAME) +find_program(CMAKE_UNAME uname /bin /usr/bin /usr/local/bin) + +if(CMAKE_UNAME) exec_program(uname ARGS -r OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION) - string (REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1" DARWIN_MAJOR_VERSION "${CMAKE_HOST_SYSTEM_VERSION}") -endif (CMAKE_UNAME) + string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1" DARWIN_MAJOR_VERSION "${CMAKE_HOST_SYSTEM_VERSION}") +endif(CMAKE_UNAME) # Force the compilers to gcc for iOS -include (CMakeForceCompiler) -CMAKE_FORCE_C_COMPILER (/usr/bin/clang Apple) -CMAKE_FORCE_CXX_COMPILER (/usr/bin/clang++ Apple) +include(CMakeForceCompiler) +CMAKE_FORCE_C_COMPILER(/usr/bin/clang Apple) +CMAKE_FORCE_CXX_COMPILER(/usr/bin/clang++ Apple) set(CMAKE_AR ar CACHE FILEPATH "" FORCE) # Skip the platform compiler checks for cross compiling -set (CMAKE_CXX_COMPILER_WORKS TRUE) -set (CMAKE_C_COMPILER_WORKS TRUE) +set(CMAKE_CXX_COMPILER_WORKS TRUE) +set(CMAKE_C_COMPILER_WORKS TRUE) # All iOS/Darwin specific settings - some may be redundant -set (CMAKE_SHARED_LIBRARY_PREFIX "lib") -set (CMAKE_SHARED_LIBRARY_SUFFIX ".dylib") -set (CMAKE_SHARED_MODULE_PREFIX "lib") -set (CMAKE_SHARED_MODULE_SUFFIX ".so") -set (CMAKE_MODULE_EXISTS 1) -set (CMAKE_DL_LIBS "") - -set (CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ") -set (CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ") -set (CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}") -set (CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}") - -# Hidden visibilty is required for cxx on iOS -set (CMAKE_C_FLAGS_INIT "") -set (CMAKE_CXX_FLAGS_INIT "-fvisibility=hidden -fvisibility-inlines-hidden") - -set (CMAKE_C_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}") -set (CMAKE_CXX_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}") - -set (CMAKE_PLATFORM_HAS_INSTALLNAME 1) -set (CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -headerpad_max_install_names") -set (CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -headerpad_max_install_names") -set (CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,") -set (CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,") -set (CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a") +set(CMAKE_SHARED_LIBRARY_PREFIX "lib") +set(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib") +set(CMAKE_SHARED_MODULE_PREFIX "lib") +set(CMAKE_SHARED_MODULE_SUFFIX ".so") +set(CMAKE_MODULE_EXISTS 1) +set(CMAKE_DL_LIBS "") + +set(CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ") +set(CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ") +set(CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}") +set(CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}") + +# Hidden visibilty is required for cxx on iOS +set(CMAKE_C_FLAGS_INIT "") +set(CMAKE_CXX_FLAGS_INIT "-fvisibility=hidden -fvisibility-inlines-hidden") + +set(CMAKE_C_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}") +set(CMAKE_CXX_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}") + +set(CMAKE_PLATFORM_HAS_INSTALLNAME 1) +set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -headerpad_max_install_names") +set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -headerpad_max_install_names") +set(CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,") +set(CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,") +set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a") # hack: if a new cmake (which uses CMAKE_INSTALL_NAME_TOOL) runs on an old build tree # (where install_name_tool was hardcoded) and where CMAKE_INSTALL_NAME_TOOL isn't in the cache # and still cmake didn't fail in CMakeFindBinUtils.cmake (because it isn't rerun) # hardcode CMAKE_INSTALL_NAME_TOOL here to install_name_tool, so it behaves as it did before, Alex -if (NOT DEFINED CMAKE_INSTALL_NAME_TOOL) +if(NOT DEFINED CMAKE_INSTALL_NAME_TOOL) find_program(CMAKE_INSTALL_NAME_TOOL install_name_tool) -endif (NOT DEFINED CMAKE_INSTALL_NAME_TOOL) +endif(NOT DEFINED CMAKE_INSTALL_NAME_TOOL) # Setup iOS platform unless specified manually with IOS_PLATFORM -if (NOT DEFINED IOS_PLATFORM) - set (IOS_PLATFORM "OS") -endif (NOT DEFINED IOS_PLATFORM) -set (IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING "Type of iOS Platform") +if(NOT DEFINED IOS_PLATFORM) + set(IOS_PLATFORM "OS") +endif(NOT DEFINED IOS_PLATFORM) + +set(IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING "Type of iOS Platform") # Setup building for arm64 or not -if (NOT DEFINED BUILD_ARM64) - set (BUILD_ARM64 true) -endif (NOT DEFINED BUILD_ARM64) -set (BUILD_ARM64 ${BUILD_ARM64} CACHE STRING "Build arm64 arch or not") +if(NOT DEFINED BUILD_ARM64) + set(BUILD_ARM64 true) +endif(NOT DEFINED BUILD_ARM64) + +set(BUILD_ARM64 ${BUILD_ARM64} CACHE STRING "Build arm64 arch or not") # Check the platform selection and setup for developer root -if (${IOS_PLATFORM} STREQUAL "OS") - set (IOS_PLATFORM_LOCATION "iPhoneOS.platform") +if(${IOS_PLATFORM} STREQUAL "OS") + set(IOS_PLATFORM_LOCATION "iPhoneOS.platform") # This causes the installers to properly locate the output libraries - set (CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos") -elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR") - set (SIMULATOR true) - set (IOS_PLATFORM_LOCATION "iPhoneSimulator.platform") + set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos") +elseif(${IOS_PLATFORM} STREQUAL "SIMULATOR") + set(SIMULATOR true) + set(IOS_PLATFORM_LOCATION "iPhoneSimulator.platform") # This causes the installers to properly locate the output libraries - set (CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator") -elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR64") - set (SIMULATOR true) - set (IOS_PLATFORM_LOCATION "iPhoneSimulator.platform") + set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator") +elseif(${IOS_PLATFORM} STREQUAL "SIMULATOR64") + set(SIMULATOR true) + set(IOS_PLATFORM_LOCATION "iPhoneSimulator.platform") # This causes the installers to properly locate the output libraries - set (CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator") -else (${IOS_PLATFORM} STREQUAL "OS") - message (FATAL_ERROR "Unsupported IOS_PLATFORM value selected. Please choose OS or SIMULATOR") -endif (${IOS_PLATFORM} STREQUAL "OS") + set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator") +else(${IOS_PLATFORM} STREQUAL "OS") + message(FATAL_ERROR "Unsupported IOS_PLATFORM value selected. Please choose OS or SIMULATOR") +endif(${IOS_PLATFORM} STREQUAL "OS") # Setup iOS developer location unless specified manually with CMAKE_IOS_DEVELOPER_ROOT # Note Xcode 4.3 changed the installation location, choose the most recent one available exec_program(/usr/bin/xcode-select ARGS -print-path OUTPUT_VARIABLE CMAKE_XCODE_DEVELOPER_DIR) -set (XCODE_POST_43_ROOT "${CMAKE_XCODE_DEVELOPER_DIR}/Platforms/${IOS_PLATFORM_LOCATION}/Developer") -set (XCODE_PRE_43_ROOT "/Developer/Platforms/${IOS_PLATFORM_LOCATION}/Developer") -if (NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT) - if (EXISTS ${XCODE_POST_43_ROOT}) - set (CMAKE_IOS_DEVELOPER_ROOT ${XCODE_POST_43_ROOT}) +set(XCODE_POST_43_ROOT "${CMAKE_XCODE_DEVELOPER_DIR}/Platforms/${IOS_PLATFORM_LOCATION}/Developer") +set(XCODE_PRE_43_ROOT "/Developer/Platforms/${IOS_PLATFORM_LOCATION}/Developer") + +if(NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT) + if(EXISTS ${XCODE_POST_43_ROOT}) + set(CMAKE_IOS_DEVELOPER_ROOT ${XCODE_POST_43_ROOT}) elseif(EXISTS ${XCODE_PRE_43_ROOT}) - set (CMAKE_IOS_DEVELOPER_ROOT ${XCODE_PRE_43_ROOT}) - endif (EXISTS ${XCODE_POST_43_ROOT}) -endif (NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT) -set (CMAKE_IOS_DEVELOPER_ROOT ${CMAKE_IOS_DEVELOPER_ROOT} CACHE PATH "Location of iOS Platform") + set(CMAKE_IOS_DEVELOPER_ROOT ${XCODE_PRE_43_ROOT}) + endif(EXISTS ${XCODE_POST_43_ROOT}) +endif(NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT) + +set(CMAKE_IOS_DEVELOPER_ROOT ${CMAKE_IOS_DEVELOPER_ROOT} CACHE PATH "Location of iOS Platform") # Find and use the most recent iOS sdk unless specified manually with CMAKE_IOS_SDK_ROOT -if (NOT DEFINED CMAKE_IOS_SDK_ROOT) - file (GLOB _CMAKE_IOS_SDKS "${CMAKE_IOS_DEVELOPER_ROOT}/SDKs/*") - if (_CMAKE_IOS_SDKS) - list (SORT _CMAKE_IOS_SDKS) - list (REVERSE _CMAKE_IOS_SDKS) - list (GET _CMAKE_IOS_SDKS 0 CMAKE_IOS_SDK_ROOT) - else (_CMAKE_IOS_SDKS) - message (FATAL_ERROR "No iOS SDK's found in default search path ${CMAKE_IOS_DEVELOPER_ROOT}. Manually set CMAKE_IOS_SDK_ROOT or install the iOS SDK.") - endif (_CMAKE_IOS_SDKS) - message (STATUS "Toolchain using default iOS SDK: ${CMAKE_IOS_SDK_ROOT}") -endif (NOT DEFINED CMAKE_IOS_SDK_ROOT) -set (CMAKE_IOS_SDK_ROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Location of the selected iOS SDK") +if(NOT DEFINED CMAKE_IOS_SDK_ROOT) + file(GLOB _CMAKE_IOS_SDKS "${CMAKE_IOS_DEVELOPER_ROOT}/SDKs/*") -# Set the sysroot default to the most recent SDK -set (CMAKE_OSX_SYSROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Sysroot used for iOS support") + if(_CMAKE_IOS_SDKS) + list(SORT _CMAKE_IOS_SDKS) + list(REVERSE _CMAKE_IOS_SDKS) + list(GET _CMAKE_IOS_SDKS 0 CMAKE_IOS_SDK_ROOT) + else(_CMAKE_IOS_SDKS) + message(FATAL_ERROR "No iOS SDK's found in default search path ${CMAKE_IOS_DEVELOPER_ROOT}. Manually set CMAKE_IOS_SDK_ROOT or install the iOS SDK.") + endif(_CMAKE_IOS_SDKS) -# set the architecture for iOS -if (${IOS_PLATFORM} STREQUAL "OS") - set (IOS_ARCH armv7) # XXX(toshok) armv7s arm64 -elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR") - set (IOS_ARCH i386) -elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR64") - set (IOS_ARCH x86_64) -endif (${IOS_PLATFORM} STREQUAL "OS") + message(STATUS "Toolchain using default iOS SDK: ${CMAKE_IOS_SDK_ROOT}") +endif(NOT DEFINED CMAKE_IOS_SDK_ROOT) -#set (CMAKE_OSX_ARCHITECTURES ${IOS_ARCH} CACHE string "Build architecture for iOS") +set(CMAKE_IOS_SDK_ROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Location of the selected iOS SDK") -set (CMAKE_CXX_FLAGS "-arch ${IOS_ARCH} -isysroot ${IOS_SYSROOT} -miphoneos-version-min=${MIN_IOS_VERSION}") -set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "ios c++ flags") -set (CMAKE_C_FLAGS "-arch ${IOS_ARCH} -isysroot ${IOS_SYSROOT} -miphoneos-version-min=${MIN_IOS_VERSION}") -set (CMAKE_C_FLAGS ${CMAKE_C_FLAGS} CACHE STRING "ios c flags") +# Set the sysroot default to the most recent SDK +set(CMAKE_OSX_SYSROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Sysroot used for iOS support") + +# set the architecture for iOS +if(${IOS_PLATFORM} STREQUAL "OS") + set(IOS_ARCH arm64) # XXX(toshok) armv7s arm64 +elseif(${IOS_PLATFORM} STREQUAL "SIMULATOR") + set(IOS_ARCH arm64) +endif(${IOS_PLATFORM} STREQUAL "OS") + +# set (CMAKE_OSX_ARCHITECTURES ${IOS_ARCH} CACHE string "Build architecture for iOS") +set(CMAKE_CXX_FLAGS "-arch ${IOS_ARCH} -isysroot ${IOS_SYSROOT} -miphoneos-version-min=${MIN_IOS_VERSION}") +set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "ios c++ flags") +set(CMAKE_C_FLAGS "-arch ${IOS_ARCH} -isysroot ${IOS_SYSROOT} -miphoneos-version-min=${MIN_IOS_VERSION}") +set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} CACHE STRING "ios c flags") # Set the find root to the iOS developer roots and to user defined paths -set (CMAKE_FIND_ROOT_PATH ${CMAKE_IOS_DEVELOPER_ROOT} ${CMAKE_IOS_SDK_ROOT} ${CMAKE_PREFIX_PATH} CACHE string "iOS find search path root") +set(CMAKE_FIND_ROOT_PATH ${CMAKE_IOS_DEVELOPER_ROOT} ${CMAKE_IOS_SDK_ROOT} ${CMAKE_PREFIX_PATH} CACHE STRING "iOS find search path root") # default to searching for frameworks first -set (CMAKE_FIND_FRAMEWORK FIRST) +set(CMAKE_FIND_FRAMEWORK FIRST) # set up the default search directories for frameworks -set (CMAKE_SYSTEM_FRAMEWORK_PATH +set(CMAKE_SYSTEM_FRAMEWORK_PATH ${CMAKE_IOS_SDK_ROOT}/System/Library/Frameworks ${CMAKE_IOS_SDK_ROOT}/System/Library/PrivateFrameworks ${CMAKE_IOS_SDK_ROOT}/Developer/Library/Frameworks ) # only search the iOS sdks, not the remainder of the host filesystem -set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY) -set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) -set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) - +set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY) +set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) +set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) # This little macro lets you set any XCode specific property -macro (set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE) - set_property (TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} ${XCODE_VALUE}) -endmacro (set_xcode_property) - +macro(set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE) + set_property(TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} ${XCODE_VALUE}) +endmacro(set_xcode_property) # This macro lets you find executable programs on the host system -macro (find_host_package) - set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) - set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER) - set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER) - set (IOS FALSE) +macro(find_host_package) + set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) + set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER) + set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER) + set(IOS FALSE) find_package(${ARGN}) - set (IOS TRUE) - set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY) - set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) - set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) -endmacro (find_host_package) - + set(IOS TRUE) + set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY) + set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) + set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) +endmacro(find_host_package) diff --git a/ejs-es6.js b/ejs-es6.js index 8810dd9c..18bbe8a5 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -122,13 +122,13 @@ function set_target(str) { triple = new Triple("x86_64", "unknown", "linux"); break; case "macos": - triple = new Triple("arm64", "apple", "darwin"); + triple = new Triple("arm64", "apple", "macos"); break; case "iossim": - triple = new Triple("arm64", "apple", "darwin"); + triple = new Triple("arm64", "apple", "ios", "simulator"); break; case "iosdev": - triple = new Triple("arm64", "apple", "darwin"); + triple = new Triple("arm64", "apple", "ios"); break; default: triple = Triple.fromString(str); @@ -304,7 +304,7 @@ if (!file_args || file_args.length === 0) { } if (!options.quiet) { - console.log(`host: ${host_triple}, target: ${target_triple}`); + console.log(`host: ${host_triple.toShortString()}, target: ${target_triple.toShortString()}`); } debug.setLevel(options.debug_level); @@ -322,33 +322,15 @@ let dev_bin = `${dev_base}/Developer/usr/bin`; function target_llc_args(triple) { let args = [`-march=${triple.llcArch()}`]; switch (triple.os) { - case "darwin": - switch (triple.arch) { - case "arm": - args = args.concat([ - `-mtriple=thumbv7-apple-ios${options.ios_min}.0`, - "-mattr=+v6", - "--relocation-model=pic", - "-soft-float", - ]); - break; - case "arm64": - args = args.concat([ - `-mtriple=arm64-apple-macosx${options.osx_min}.0`, - "-mattr=+fp-armv8", - "--relocation-model=pic", - ]); - break; - case "x86": - args = args.concat([ - `-mtriple=i386-apple-ios${options.ios_min}.0`, - "--relocation-model=pic", - ]); - break; - case "x86_64": - args = args.concat([`-mtriple=x86_64-apple-macosx${options.osx_min}.0`]); - break; - } + case "macos": + args = args.concat([ + `-mtriple=arm64-apple-macosx${options.osx_min}.0`, + "-mattr=+fp-armv8", + "--relocation-model=pic", + ]); + break; + case "ios": + args = args.concat([`-mtriple=arm64-apple-ios${options.ios_min}.0`]); break; case "linux": args = args.concat(["--relocation-model=pic"]); @@ -369,15 +351,19 @@ function target_link_args(triple) { return args; } - if (triple.os === "darwin") { - // we need more here now that everything is apple silicon - if (triple.arch === "x86_64" || triple.arch === "arm64") return args; - if (triple.arch === "x86") + if (triple.os === "macos") { + return args; + } + + if (triple.os === "ios") { + if (triple.env === "simulator") { return args.concat([ "-isysroot", `${sim_base}/Developer/SDKs/iPhoneSimulator${options.ios_sdk}.sdk`, `-miphoneos-version-min=${options.ios_min}`, ]); + } + return args.concat([ "-isysroot", `${dev_base}/Developer/SDKs/iPhoneOS${options.ios_sdk}.sdk`, @@ -394,15 +380,15 @@ function target_libraries(triple) { return ["-lunwind", "-lpthread", "-luv"]; } - if (triple.os === "darwin") { - let rv = ["-framework", "Foundation"]; - + if (triple.os === "macos") { // for macos we only need Foundation and AppKit - if (triple.arch === "x86_64" || triple.arch === "arm64") - return rv.concat(["-framework", "AppKit"]); + return ["-framework", "Foundation", "-framework", "AppKit"]; + } - // for any other darwin we're dealing with ios, so... - return rv.concat([ + if (triple.os === "ios") { + return [ + "-framework", + "Foundation", "-framework", "UIKit", "-framework", @@ -411,7 +397,7 @@ function target_libraries(triple) { "OpenGLES", "-framework", "CoreGraphics", - ]); + ]; } return []; } @@ -420,7 +406,7 @@ function target_libecho(triple) { if (options.srcdir) { return path.join("runtime", "out", `${triple}`, "libecho.a"); } else { - return path.join(relative_to_ejs_exe(`../lib/${triple.arch}-${triple.os}`), "libecho.a"); + return path.join(relative_to_ejs_exe(`../lib/${triple}`), "libecho.a"); } } @@ -432,41 +418,41 @@ function target_extra_libs(triple) { "external-deps/pcre-linux/.libs/libpcre16.a", ]; - if (triple.os === "darwin") { - if (triple.arch === "x86_64") - return [ - "external-deps/double-conversion-osx/double-conversion/libdouble-conversion.a", - "external-deps/pcre-osx/.libs/libpcre16.a", - ]; - if (triple.arch === "x86") + if (triple.os === "macos") { + return [ + "external-deps/double-conversion-macos/double-conversion/libdouble-conversion.a", + "external-deps/pcre-macos/.libs/libpcre16.a", + ]; + } + + if (triple.os === "ios") { + if (triple.env === "simulator") { return [ "external-deps/double-conversion-iossim/double-conversion/libdouble-conversion.a", "external-deps/pcre-iossim/.libs/libpcre16.a", ]; - if (triple.arch === "arm") - return [ - "external-deps/double-conversion-iosdev/double-conversion/libdouble-conversion.a", - "external-deps/pcre-iosdev/.libs/libpcre16.a", - ]; - if (triple.arch === "arm64") - return [ - "external-deps/double-conversion-osx/double-conversion/libdouble-conversion.a", - "external-deps/pcre-osx/.libs/libpcre16.a", - ]; + } + + return [ + "external-deps/double-conversion-iosdev/double-conversion/libdouble-conversion.a", + "external-deps/pcre-iosdev/.libs/libpcre16.a", + ]; } throw new Error("no pcre for this platform"); } else { return ["libdouble-conversion.a", "libpcre16.a"].map((lib) => - path.join(relative_to_ejs_exe(`../lib/${triple.arch}-${triple.os}`), lib) + path.join(relative_to_ejs_exe(`../lib/${triple}`), lib) ); } } function target_path_prepend(triple) { - if (triple.os === "darwin") { - if (triple.arch === "x86") return sim_bin; - if (triple.arch === "arm64") return dev_bin; + if (triple.os === "ios") { + if (triple.env === "simulator") { + return sim_bin; + } + return dev_bin; } return ""; } diff --git a/ejs-llvm/ejs-llvm.ejs.in b/ejs-llvm/ejs-llvm.ejs.in index 04b57bf0..2b20370f 100644 --- a/ejs-llvm/ejs-llvm.ejs.in +++ b/ejs-llvm/ejs-llvm.ejs.in @@ -1,12 +1,11 @@ { "ejs_version": "@EJS_VERSION@", - "module_name": "llvm", - "init_function": "_ejs_llvm_init", + "init_function": "_ejs_llvm_init", "link_flags": "@LLVM_LINK_FLAGS@", "module_file": "libejsllvm-module.a", - "module_version": "0.0.0-alpha1", - - "exports": [ "IRBuilder" ] + "exports": [ + "IRBuilder" + ] } diff --git a/external-deps/Makefile b/external-deps/Makefile index c9451ffe..f91ee7bc 100644 --- a/external-deps/Makefile +++ b/external-deps/Makefile @@ -21,9 +21,9 @@ ifeq ($(HOST_OS),linux) _TARGETS=linux else ifneq ($(CIRCLE_BUILD_NUM),) -_TARGETS=osx +_TARGETS=macos else -_TARGETS=iossim iosdev osx +_TARGETS=iossim iosdev macos endif endif @@ -38,9 +38,9 @@ clean-double-conversion: $(_TARGETS:%=clean-double-conversion-%) .stamp-build-double-conversion-linux: .stamp-configure-double-conversion-linux $(MAKE) -C double-conversion-linux && touch $@ -.stamp-configure-double-conversion-osx: double-conversion/CMakeLists.txt - @$(MKDIR) double-conversion-osx - (cd double-conversion-osx && cmake ../double-conversion) && touch $@ +.stamp-configure-double-conversion-macos: double-conversion/CMakeLists.txt + @$(MKDIR) double-conversion-macos + (cd double-conversion-macos && cmake ../double-conversion) && touch $@ .stamp-configure-double-conversion-iossim: double-conversion/CMakeLists.txt @$(MKDIR) double-conversion-iossim @@ -52,8 +52,8 @@ clean-double-conversion: $(_TARGETS:%=clean-double-conversion-%) (cd double-conversion-iosdev && \ cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../build/iOS.cmake -DIOS_PLATFORM=OS -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSDEV_SYSROOT)) && touch $@ -.stamp-build-double-conversion-osx: .stamp-configure-double-conversion-osx - $(MAKE) -C double-conversion-osx && touch $@ +.stamp-build-double-conversion-macos: .stamp-configure-double-conversion-macos + $(MAKE) -C double-conversion-macos && touch $@ .stamp-build-double-conversion-iossim: .stamp-configure-double-conversion-iossim $(MAKE) -C double-conversion-iossim && touch $@ @@ -63,7 +63,7 @@ clean-double-conversion: $(_TARGETS:%=clean-double-conversion-%) build-double-conversion-linux: .stamp-build-double-conversion-linux -build-double-conversion-osx: .stamp-build-double-conversion-osx +build-double-conversion-macos: .stamp-build-double-conversion-macos build-double-conversion-iossim: .stamp-build-double-conversion-iossim build-double-conversion-iosdev: .stamp-build-double-conversion-iosdev @@ -76,9 +76,9 @@ clean-double-conversion-iosdev: -@test -d double-conversion-iosdev && $(MAKE) -C double-conversion-iosdev clean @rm -f .stamp-build-double-conversion-iosdev -clean-double-conversion-osx: - -@test -d double-conversion-osx && $(MAKE) -C double-conversion-osx clean - @rm -f .stamp-build-double-conversion-osx +clean-double-conversion-macos: + -@test -d double-conversion-macos && $(MAKE) -C double-conversion-macos clean + @rm -f .stamp-build-double-conversion-macos clean-double-conversion-linux: -@test -d double-conversion-linux && $(MAKE) -C double-conversion-linux clean @@ -93,36 +93,36 @@ clean-pcre: $(_TARGETS:%=clean-pcre-%) (cd pcre-linux && \ ../pcre/configure $(PCRE_CONFIGURE_ARGS)) && touch $@ -.stamp-configure-pcre-osx: pcre/configure - @$(MKDIR) pcre-osx - (cd pcre-osx && \ +.stamp-configure-pcre-macos: pcre/configure + @$(MKDIR) pcre-macos + (cd pcre-macos && \ ../pcre/configure $(PCRE_CONFIGURE_ARGS)) && touch $@ .stamp-configure-pcre-iossim: pcre/configure @$(MKDIR) pcre-iossim (cd pcre-iossim && \ PATH=$(IOSSIM_ROOT)/usr/bin:$$PATH \ - CC="clang $(IOSSIM_ARCH) $(IOSSIM_ARCH_FLAGS) -miphoneos-version-min=$(MIN_IOS_VERSION) -isysroot $(IOSSIM_SYSROOT)" \ - CXX="clang++ $(IOSSIM_ARCH) $(IOSSIM_ARCH_FLAGS) -miphoneos-version-min=$(MIN_IOS_VERSION) -isysroot $(IOSSIM_SYSROOT)" \ + CC="clang $(IOSSIM_ARCH) $(IOSSIM_ARCH_FLAGS) -isysroot $(IOSSIM_SYSROOT) -target $(IOSSIM_CLANG_TRIPLE)" \ + CXX="clang++ $(IOSSIM_ARCH) $(IOSSIM_ARCH_FLAGS) -isysroot $(IOSSIM_SYSROOT) -target $(IOSSIM_CLANG_TRIPLE)" \ LD="clang" \ AS="$(IOSSIM_ROOT)/usr/bin/as" \ - ../pcre/configure --host=$(IOSSIM_TRIPLE) $(PCRE_CONFIGURE_ARGS)) && touch $@ + ../pcre/configure --host=$(IOSSIM_GNU_TRIPLE) $(PCRE_CONFIGURE_ARGS)) && touch $@ .stamp-configure-pcre-iosdev: pcre/configure @$(MKDIR) pcre-iosdev (cd pcre-iosdev && \ PATH=$(IOSDEV_ROOT)/usr/bin:$$PATH \ - CC="clang $(IOSDEV_ARCH) $(IOSDEV_ARCH_FLAGS) -miphoneos-version-min=$(MIN_IOS_VERSION) -isysroot $(IOSDEV_SYSROOT)" \ - CXX="clang++ $(IOSDEV_ARCH) $(IOSDEV_ARCH_FLAGS) -miphoneos-version-min=$(MIN_IOS_VERSION) -isysroot $(IOSDEV_SYSROOT)" \ + CC="clang $(IOSDEV_ARCH) $(IOSDEV_ARCH_FLAGS) -miphoneos-version-min=$(MIN_IOS_VERSION) -isysroot $(IOSDEV_SYSROOT) -target $(IOSDEV_CLANG_TRIPLE)" \ + CXX="clang++ $(IOSDEV_ARCH) $(IOSDEV_ARCH_FLAGS) -miphoneos-version-min=$(MIN_IOS_VERSION) -isysroot $(IOSDEV_SYSROOT) -target $(IOSDEV_CLANG_TRIPLE)" \ LD="clang" \ AS="$(IOSDEV_ROOT)/usr/bin/as" \ - ../pcre/configure --host=$(IOSDEV_TRIPLE) $(PCRE_CONFIGURE_ARGS)) && touch $@ + ../pcre/configure --host=$(IOSDEV_GNU_TRIPLE) $(PCRE_CONFIGURE_ARGS)) && touch $@ .stamp-build-pcre-linux: .stamp-configure-pcre-linux $(MAKE) -C pcre-linux pcre_chartables.c libpcre16.la && touch $@ -.stamp-build-pcre-osx: .stamp-configure-pcre-osx - $(MAKE) -C pcre-osx pcre_chartables.c libpcre16.la && touch $@ +.stamp-build-pcre-macos: .stamp-configure-pcre-macos + $(MAKE) -C pcre-macos pcre_chartables.c libpcre16.la && touch $@ .stamp-build-pcre-iossim: .stamp-configure-pcre-iossim $(MAKE) -C pcre-iossim pcre_chartables.c libpcre16.la && touch $@ @@ -133,7 +133,7 @@ clean-pcre: $(_TARGETS:%=clean-pcre-%) build-pcre-linux: .stamp-build-pcre-linux -build-pcre-osx: .stamp-build-pcre-osx +build-pcre-macos: .stamp-build-pcre-macos build-pcre-iossim: .stamp-build-pcre-iossim build-pcre-iosdev: .stamp-build-pcre-iosdev @@ -150,9 +150,9 @@ clean-pcre-iosdev: -@test -d pcre-iosdev && $(MAKE) -C pcre-iosdev clean @rm -f .stamp-build-pcre-iosdev -clean-pcre-osx: - -@test -d pcre-osx && $(MAKE) -C pcre-osx clean - @rm -f .stamp-build-pcre-osx +clean-pcre-macos: + -@test -d pcre-macos && $(MAKE) -C pcre-macos clean + @rm -f .stamp-build-pcre-macos clean-pcre-linux: -@test -d pcre-linux && $(MAKE) -C pcre-linux clean diff --git a/lib/passes/gather-imports.js b/lib/passes/gather-imports.js index d54db8e7..b90ef511 100644 --- a/lib/passes/gather-imports.js +++ b/lib/passes/gather-imports.js @@ -207,28 +207,30 @@ function parseFile(filename, content, options) { } } -function getModuleFile(module_info, platform) { +function getModuleFile(module_info, triple) { if (typeof module_info.module_file == "string") { return module_info.module_file; } - if (!module_info.module_file[platform]) { + const module_file_key = triple.toShortString(); + if (!module_info.module_file[module_file_key]) { throw new Error( - `module ${module_info.module_name} doesn't have a module file for platform ${platform}` + `module ${module_info.module_name} doesn't have a module file for ${module_file_key}` ); } - return module_info.module_file[platform]; + return module_info.module_file[module_file_key]; } -function getModuleLinkFlags(module_info, platform) { +function getModuleLinkFlags(module_info, triple) { if (typeof module_info.link_flags == "string") { return module_info.link_flags; } - if (!module_info.link_flags[platform]) { + const module_file_key = triple.toShortString(); + if (!module_info.link_flags[module_file_key]) { throw new Error( - `module ${module_info.module_name} doesn't have a link flags for platform ${platform}` + `module ${module_info.module_name} doesn't have a link flags for ${module_file_key}` ); } - return module_info.link_flags[platform]; + return module_info.link_flags[module_file_key]; } function registerNativeModuleInfo( @@ -237,12 +239,12 @@ function registerNativeModuleInfo( link_flags, module_files, module_info, - platform + triple ) { if (module_info.link_flags) - link_flags = link_flags.concat(getModuleLinkFlags(module_info, platform)); + link_flags = link_flags.concat(getModuleLinkFlags(module_info, triple)); if (module_info.module_file) - module_files = module_files.concat(getModuleFile(module_info, platform)); + module_files = module_files.concat(getModuleFile(module_info, triple)); if (module_info.init_function) { // this module can be imported @@ -272,14 +274,14 @@ function registerNativeModuleInfo( } } -function gatherNativeModuleInfo(ejs_file, platform) { +function gatherNativeModuleInfo(ejs_file, triple) { let module_info = JSON.parse(fs.readFileSync(ejs_file, "utf-8")); let module_name = module_info.module_name || path.basename(ejs_file, ".ejs"); - registerNativeModuleInfo(path.dirname(ejs_file), module_name, [], [], module_info, platform); + registerNativeModuleInfo(path.dirname(ejs_file), module_name, [], [], module_info, triple); } -function gatherAllNativeModules(module_dirs, platform) { +function gatherAllNativeModules(module_dirs, triple) { // gather a list of all native modules, flattening their submodule lists for (let mdir of module_dirs) { try { @@ -287,7 +289,7 @@ function gatherAllNativeModules(module_dirs, platform) { files.forEach((f) => { if (path.extname(f) === ".ejs") { try { - gatherNativeModuleInfo(path.resolve(mdir, f), platform); + gatherNativeModuleInfo(path.resolve(mdir, f), triple); } catch (e) { console.warn(`parsing of module file ${f} failed: ${e}`); } @@ -301,10 +303,7 @@ export function gatherAllModules(file_args, options, triple) { let work_list = file_args.slice(); let files = []; - gatherAllNativeModules( - options.native_module_dirs, - `${triple.os}-${triple.arch}` - ); + gatherAllNativeModules(options.native_module_dirs, triple); // starting at the main file, gather all files we'll need while (work_list.length !== 0) { diff --git a/lib/triple.js b/lib/triple.js index 39e6347d..39d34e6b 100644 --- a/lib/triple.js +++ b/lib/triple.js @@ -3,14 +3,22 @@ import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; export class Triple { - constructor(arch, vendor, os) { + constructor({ arch, vendor, os, env }) { this.arch = arch; this.vendor = vendor; this.os = os; + this.env = env; } toString() { - return `${this.arch}-${this.vendor}-${this.os}`; + const envSuffix = this.env ? `-${this.env}` : ""; + return `${this.arch}-${this.vendor}-${this.os}${envSuffix}`; + } + + // same as toString but we drop the vendor + toShortString() { + const envSuffix = this.env ? `-${this.env}` : ""; + return `${this.arch}-${this.os}${envSuffix}`; } isLittleEndian() { @@ -95,25 +103,47 @@ export class Triple { if (arch === "x64") arch = "x86_64"; if (arch === "ia32") arch = "x86"; - let platform = os.platform(); - if (platform === "darwin") { + let _os = os.platform(); + if (_os === "darwin") { vendor = "apple"; + _os = "macos"; } - return new Triple(arch, vendor, platform); + return new Triple({ arch, vendor, os: _os }); } static fromString(str) { let split = str.split("-"); - let arch, vendor, os; + let arch, vendor, os, env; if (split.length == 2) { arch = "unknown"; [vendor, os] = split; } else if (split.length == 3) { [arch, vendor, os] = split; + } else if (split.length == 4) { + [arch, vendor, os, env] = split; } else { throw new Error(`invalid triple: ${str}`); } - return new Triple(arch, vendor, os); + return new Triple({ arch, vendor, os, env }); + } + + static fromShortString(str) { + let split = str.split("-"); + let arch, vendor, os, env; + if (split.length == 2) { + [arch, os] = split; + } else if (split.length == 3) { + [arch, os, env] = split; + } else { + throw new Error(`invalid triple short string: ${str}`); + } + // try and fill in the vendor + if (os === "macos" || os === "ios" || os === "tvos" || os === "watchos") { + vendor = "apple"; + } /* if (os === "linux") */ else { + vendor = "unknown"; + } + return new Triple({ arch, vendor, os, env }); } } diff --git a/modules/objc_internal/objc_internal.ejs b/modules/objc_internal/objc_internal.ejs index 1669d4fe..4872f115 100644 --- a/modules/objc_internal/objc_internal.ejs +++ b/modules/objc_internal/objc_internal.ejs @@ -4,17 +4,17 @@ "submodules": [], "init_function": "_ejs_objc_module_func", "exports": [ - "requireFramework", - "allocInstance", - "staticCall", - "getInstanceVariable", - "setInstanceVariable", - "selectorInvoker", - "getTypeEncoding", - "registerJSClass", - "allocateWebGLRenderingContext", - "UIApplicationMain", - "NSApplicationMain" + "requireFramework", + "allocInstance", + "staticCall", + "getInstanceVariable", + "setInstanceVariable", + "selectorInvoker", + "getTypeEncoding", + "registerJSClass", + "allocateWebGLRenderingContext", + "UIApplicationMain", + "NSApplicationMain" ], "link_flags": "", "module_version": "0.1.0-alpha.1" diff --git a/node-compat/node-compat.ejs b/node-compat/node-compat.ejs index 7951380e..14a3ae6b 100644 --- a/node-compat/node-compat.ejs +++ b/node-compat/node-compat.ejs @@ -1,20 +1,54 @@ { "ejs_version": "0.1.0-alpha.3", - "module_name": "node-compat", "submodules": [ - { "module_name": "path", "init_function": "_ejs_path_module_func", "exports": [ "dirname", "basename", "extname", "resolve", "relative", "join" ] }, - { "module_name": "os", "init_function": "_ejs_os_module_func", "exports": [ "arch", "platform", "tmpdir" ] }, - { "module_name": "fs", "init_function": "_ejs_fs_module_func", "exports": [ "statSync", "readFileSync", "createWriteStream", "readdirSync" ] }, - { "module_name": "child_process", "init_function": "_ejs_child_process_module_func", "exports": [ "spawn", "stdout", "stderr" ] } + { + "module_name": "path", + "init_function": "_ejs_path_module_func", + "exports": [ + "dirname", + "basename", + "extname", + "resolve", + "relative", + "join" + ] + }, + { + "module_name": "os", + "init_function": "_ejs_os_module_func", + "exports": [ + "arch", + "platform", + "tmpdir" + ] + }, + { + "module_name": "fs", + "init_function": "_ejs_fs_module_func", + "exports": [ + "statSync", + "readFileSync", + "createWriteStream", + "readdirSync" + ] + }, + { + "module_name": "child_process", + "init_function": "_ejs_child_process_module_func", + "exports": [ + "spawn", + "stdout", + "stderr" + ] + } ], "link_flags": "", "module_version": "0.1.0-alpha.2", "module_file": { - "darwin-arm64": "libejsnodecompat-module.a", - "darwin-x86_64": "libejsnodecompat-module.a", - "linux-x86_64": "libejsnodecompat-module.a", - "darwin-x86": "libejsnodecompat-module.a.sim", - "darwin-armv7": "libejsnodecompat-module.a.armv7" + "x86_64-linux": "libejsnodecompat-module.a", + "arm64-macos": "libejsnodecompat-module.a", + "arm64-ios-simulator": "libejsnodecompat-module.a.iossim", + "arm64-ios": "libejsnodecompat-module.a.iosdev" } } diff --git a/runtime/Makefile b/runtime/Makefile index d65f9c36..c0fbb63c 100644 --- a/runtime/Makefile +++ b/runtime/Makefile @@ -57,17 +57,17 @@ ALL_TARGETS=$(ALL_LIBRARIES) ifeq ($(EJS_RUNLOOP_IMPL),noop) RUNLOOP_DEF=-DNOOP_RUNLOOP=1 -RUNLOOP_C_SOURCE=ejs-runloop-noop.c +C_SOURCES += ejs-runloop-noop.c else RUNLOOP_DEF=-DHAVE_LIBUV=1 -RUNLOOP_C_SOURCE=ejs-runloop-libuv.c +C_SOURCES += =ejs-runloop-libuv.c endif -LINUX_OBJECTS=$(C_SOURCES:%.c=%.o.linux) $(CPP_SOURCES:%.cpp=%.o.linux) $(OBJC_SOURCES:%.m=%.o.linux) ejs-log.o.linux ejs-invoke-closure-catch.o.linux $(RUNLOOP_C_SOURCE:%.c=%.o.linux) +LINUX_OBJECTS=$(C_SOURCES:%.c=%.o.linux) $(CPP_SOURCES:%.cpp=%.o.linux) $(OBJC_SOURCES:%.m=%.o.linux) ejs-log.o.linux ejs-invoke-closure-catch.o.linux ALL_OBJECTS=$(LINUX_OBJECTS) -CFLAGS += -I/usr/include/libunwind -I../external-deps/pcre-linux -I../external-deps/double-conversion +LINUX_CFLAGS += -I/usr/include/libunwind -I../external-deps/pcre-linux -I../external-deps/double-conversion ejs-init.o.linux: ejs-atoms-gen.c @@ -107,155 +107,92 @@ OBJC_SOURCES= \ ejs-xhr.m \ ejs-runloop-darwin.m -OSX_OBJECTS=$(C_SOURCES:%.c=out/$(OSX_TRIPLE)/%.o) $(CPP_SOURCES:%.cpp=out/$(OSX_TRIPLE)/%.o) $(OBJC_SOURCES:%.m=out/$(OSX_TRIPLE)/%.o) out/$(OSX_TRIPLE)/ejs-invoke-closure-catch.o -SIM_OBJECTS=$(C_SOURCES:%.c=out/$(IOSSIM_TRIPLE)/%.o) $(CPP_SOURCES:%.cpp=out/$(IOSSIM_TRIPLE)/%.o) $(OBJC_SOURCES:%.m=out/$(IOSSIM_TRIPLE)/%.o) out/$(IOSSIM_TRIPLE)/ejs-invoke-closure-catch.o -DEV_OBJECTS=$(C_SOURCES:%.c=out/$(IOSDEV_TRIPLE)%.o) $(CPP_SOURCES:%.cpp=out/$(IOSDEV_TRIPLE)%.o) $(OBJC_SOURCES:%.m=out/$(IOSDEV_TRIPLE)%.o) out/$(IOSDEV_TRIPLE)/ejs-invoke-closure-catch.o - -analyze_plists_c = $(C_SOURCES:%.c=%.plist) -analyze_plists_objc = $(OBJC_SOURCES:%.m=%.plist) - -OSX_LIBRARY=out/$(OSX_TRIPLE)/$(LIBRARY) -SIM_LIBRARY=out/$(IOSSIM_TRIPLE)/$(LIBRARY) -DEV_LIBRARY=$(LIBRARY).armv7 -DEVS_LIBRARY=$(LIBRARY).armv7s - -ifneq ($(CIRCLE_BUILD_NUM),) -# on circleci we only build the osx library -ALL_LIBRARIES=$(OSX_LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) -else -# on local builds we build all the libraries (XXX need to figure out how to accurately target those platforms first) -ALL_LIBRARIES=$(OSX_LIBRARY) $(SIM_LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) $(analyze_plists_c) $(analyze_plists_objc) -endif - -ALL_OBJECTS=$(SIM_OBJECTS) $(DEV_OBJECTS) $(DEVS_OBJECTS) $(OSX_OBJECTS) - -CFLAGS += -I../external-deps/pcre-osx -I../external-deps/double-conversion +MACOS_CFLAGS += -I../external-deps/pcre-macos -I../external-deps/double-conversion IOSSIM_CFLAGS += -I../external-deps/pcre-iossim -I../external-deps/double-conversion IOSDEV_CFLAGS += -I../external-deps/pcre-iosdev -I../external-deps/double-conversion -$(OSX_LIBRARY): $(OSX_OBJECTS) - @echo [ar osx] `basename $@` && /usr/bin/ar rc $@ $(OSX_OBJECTS) +ejs-webgl-constants-sorted.h: ejs-webgl-constants.h + @echo [GEN] $@ && (grep WEBGL_CONSTANT $< | sort > $@) -$(SIM_LIBRARY): $(SIM_OBJECTS) - @echo [ar sim] `basename $@` && /usr/bin/ar rc $@ $(SIM_OBJECTS) +DARWIN_OBJC_FLAGS= -ObjC -DOBJC=1 -fobjc-abi-version=2 -fobjc-legacy-dispatch -fno-objc-arc +MACOS_OBJC_FLAGS= $(DARWIN_OBJC_FLAGS) +IOSSIM_OBJC_FLAGS= $(DARWIN_OBJC_FLAGS) +IOSDEV_OBJC_FLAGS= $(DARWIN_OBJC_FLAGS) -$(DEV_LIBRARY): $(DEV_OBJECTS) - @echo [ar armv7] $@ && /usr/bin/ar rc $@ $(DEV_OBJECTS) +PREFIXES=MACOS IOSSIM IOSDEV -$(DEVS_LIBRARY): $(DEVS_OBJECTS) - @echo [ar armv7s] $@ && /usr/bin/ar rc $@ $(DEVS_OBJECTS) +INCLUDE=-include -out/$(OSX_TRIPLE)/ejs-init.o ejs-init.o.sim ejs-init.o.armv7 ejs-init.o.armv7s: ejs-atoms-gen.c +ALL_OBJECTS= -ejs-webgl-constants-sorted.h: ejs-webgl-constants.h - @echo [GEN] $@ && (grep WEBGL_CONSTANT $< | sort > $@) +define PREFIX_rules +$(1)_lowered=$(shell echo $(1) | tr '[:upper:]' '[:lower:]') +$(1)_LIBRARY=out/$($(1)_SHORT_TRIPLE)/$(LIBRARY) +$(1)_OBJECTS=$(C_SOURCES:%.c=out/$($(1)_SHORT_TRIPLE)/%.o) $(CPP_SOURCES:%.cpp=out/$($(1)_SHORT_TRIPLE)/%.o) $(OBJC_SOURCES:%.m=out/$($(1)_SHORT_TRIPLE)/%.o) out/$($(1)_SHORT_TRIPLE)/ejs-invoke-closure-catch.o -out/$(OSX_TRIPLE)/ejs-webgl.o ejs-webgl.o.sim ejs-webgl.o.armv7 ejs-webgl.o.armv7s: ejs-webgl-constants-sorted.h - - -OBJC_FLAGS= -ObjC -DOBJC=1 -fobjc-abi-version=2 -fobjc-legacy-dispatch -fno-objc-arc - -out/$(OSX_TRIPLE)/%.o: %.c - @mkdir -p .deps/out/$(OSX_TRIPLE) - @mkdir -p out/$(OSX_TRIPLE) - @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps - @echo [$(CC) osx] $< && $(CC) -ObjC $(OSX_CFLAGS) -c -o $@ $< - -out/$(OSX_TRIPLE)/%.o: %.cpp - @mkdir -p .deps/out/$(OSX_TRIPLE) - @mkdir -p out/$(OSX_TRIPLE) - @$(CXX) -MM $(OSX_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps - @echo [$(CXX) osx] $< && $(CXX) -std=c++11 $(OSX_CFLAGS) -c -o $@ $< - -out/$(OSX_TRIPLE)/%.o: %.m - @mkdir -p .deps/out/$(OSX_TRIPLE) - @mkdir -p out/$(OSX_TRIPLE) - @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps - @echo [$(CC) osx] $< && $(CC) $(OSX_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< - -out/$(OSX_TRIPLE)/%.o: %.ll - @mkdir -p .deps/out/$(OSX_TRIPLE) - @mkdir -p out/$(OSX_TRIPLE) - @echo [llc osx] $< && llc$(LLVM_SUFFIX) -mtriple=$(OSX_MTRIPLE) -filetype=obj -o=$@ -O2 $< - -out/$(IOSSIM_TRIPLE)/%.o: %.c - @mkdir -p .deps/out/$(IOSSIM_TRIPLE) - @mkdir -p out/$(IOSSIM_TRIPLE) - @$(CC) -MM $(IOSSIM_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps - @echo [$(CC) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CC) -ObjC $(IOSSIM_CFLAGS) -c -o $@ $< - -out/$(IOSSIM_TRIPLE)/%.o: %.cpp - @mkdir -p .deps/out/$(IOSSIM_TRIPLE) - @mkdir -p out/$(IOSSIM_TRIPLE) - @$(CXX) -MM $(IOSSIM_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps - @echo [$(CXX) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CXX) -std=c++11 $(IOSSIM_CFLAGS) -c -o $@ $< - -out/$(IOSSIM_TRIPLE)/%.o: %.m - @mkdir -p .deps/out/$(IOSSIM_TRIPLE) - @mkdir -p out/$(IOSSIM_TRIPLE) - @$(CC) -MM -ObjC $(IOSSIM_CFLAGS) $< | sed -e s,`basename $@`,$@, > .deps/$@-deps - @echo [$(CC) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CC) $(IOSSIM_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< - -out/$(IOSSIM_TRIPLE)/%.o: %.ll - @mkdir -p .deps/out/$(IOSSIM_TRIPLE) - @mkdir -p out/$(IOSSIM_TRIPLE) - @echo [llc sim] $< && llc$(LLVM_SUFFIX) -march=x86 -mtriple=$(IOSSIM_MTRIPLE) -filetype=obj -o=$@ -O2 $< - -%.o.armv7: %.c - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSDEV_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7,,`/$@/ > .deps/$@-deps - @echo [$(CC) armv7] $< && PATH=$(IOSDEV_BIN):$$PATH $(CC) -ObjC $(IOSDEV_CFLAGS) -c -o $@ $< +ALL_OBJECTS += $$($(1)_OBJECTS) -%.o.armv7: %.cpp - @mkdir -p .deps - @$(CXX) -MM $(IOSDEV_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7,,`/$@/ > .deps/$@-deps - @echo [$(CXX) armv7] $< && PATH=$(IOSDEV_BIN):$$PATH $(CXX) -std=c++11 $(IOSDEV_CFLAGS) -c -o $@ $< +$$($(1)_LIBRARY): $$($(1)_OBJECTS) + @echo [ar $(shell echo $(1) | tr '[:upper:]' '[:lower:]')] `basename $$@` && /usr/bin/ar rc $$@ $$($(1)_OBJECTS) -%.o.armv7: %.m - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSDEV_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7,,`/$@/ > .deps/$@-deps - @echo [$(CC) armv7] $< && PATH=$(IOSDEV_BIN):$$PATH $(CC) $(IOSDEV_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< +out/$($(1)_SHORT_TRIPLE)/%.o: %.ll + @mkdir -p .deps/out/$$($(1)_SHORT_TRIPLE) + @mkdir -p out/$$($(1)_SHORT_TRIPLE) + @echo [llc $$($(1)_lowered)] $$< && llc$$(LLVM_SUFFIX) -march=$($(1)_MARCH) -mtriple=$($(1)_MTRIPLE) -filetype=obj -o=$$@ -O2 $$< -%.o.armv7: %.ll - @echo [llc armv7] $< && llc$(LLVM_SUFFIX) -march=arm -mtriple=$(IOSDEV_MTRIPLE) -filetype=obj -o=$@ -O2 $< +out/$($(1)_SHORT_TRIPLE)/%.o: %.c + @mkdir -p .deps/out/$($(1)_SHORT_TRIPLE) + @mkdir -p out/$($(1)_SHORT_TRIPLE) + @$(CC) -MM $($(1)_CFLAGS) $$< | sed -e s,`basename $$@`,$$@, > .deps/$$@-deps + @echo [$(CC) $$($(1)_lowered)] $$< && $(CC) -ObjC $($(1)_CFLAGS) -c -o $$@ $$< -%.o.armv7s: %.c - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSDEVS_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7s,,`/$@/ > .deps/$@-deps - @echo [$(CC) armv7s] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CC) -ObjC $(IOSDEVS_CFLAGS) -c -o $@ $< +out/$($(1)_SHORT_TRIPLE)/%.o: %.cpp + @mkdir -p .deps/out/$($(1)_SHORT_TRIPLE) + @mkdir -p out/$($(1)_SHORT_TRIPLE) + @$(CXX) -MM $($(1)_CFLAGS) $$< | sed -e s,`basename $$@`,$$@, > .deps/$$@-deps + @echo [$(CXX) $$($(1)_lowered)] $$< && $(CXX) -std=c++11 $($(1)_CFLAGS) -c -o $$@ $$< -%.o.armv7s: %.cpp - @mkdir -p .deps - @$(CXX) -MM $(IOSDEVS_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7s,,`/$@/ > .deps/$@-deps - @echo [$(CXX) armv7s] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CXX) -std=c++11 $(IOSDEVS_CFLAGS) -c -o $@ $< +out/$($(1)_SHORT_TRIPLE)/%.o: %.m + @mkdir -p .deps/out/$($(1)_SHORT_TRIPLE) + @mkdir -p out/$($(1)_SHORT_TRIPLE) + $(CC) -MM $($(1)_OBJC_FLAGS) $($(1)_CFLAGS) $$< | sed -e s,`basename $$@`,$$@, > .deps/$$@-deps + @echo [$(CC) $$($(1)_lowered)] $$< && $(CC) $($(1)_OBJC_FLAGS) $($(1)_CFLAGS) -c -o $$@ $$< -%.o.armv7s: %.m - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSDEVS_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7s,,`/$@/ > .deps/$@-deps - @echo [$(CC) armv7] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CC) $(IOSDEVS_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< +out/$($(1)_SHORT_TRIPLE)/ejs-webgl.o: ejs-webgl-constants-sorted.h -%.o.armv7s: %.ll - @echo [llc armv7s] $< && llc$(LLVM_SUFFIX) -march=arm -mtriple=$(IOSDEVS_MTRIPLE) -filetype=obj -o=$@ -O2 $< +out/$($(1)_SHORT_TRIPLE)/ejs-init.o: ejs-atoms-gen.c +endef -$(analyze_plists_c): %.plist: %.c - @echo [$(CC) analyze] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CC) $(OSX_CFLAGS) --analyze $< -o $@ +$(foreach prefix,$(PREFIXES),$(eval $(call PREFIX_rules,$(prefix)))) -$(analyze_plists_objc): %.plist: %.m - @echo [$(CC) analyze] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CC) $(OSX_CFLAGS) --analyze $< -o $@ +-include $(patsubst out/$(MACOS_SHORT_TRIPLE)/%.o,.deps/out/$(MACOS_SHORT_TRIPLE)/%.o-deps,$(MACOS_OBJECTS)) +-include $(patsubst out/$(IOSSIM_SHORT_TRIPLE)/%.o,.deps/out/$(IOSSIM_SHORT_TRIPLE)/%.o-deps,$(IOSSIM_OBJECTS)) +-include $(patsubst out/$(IOSDEV_SHORT_TRIPLE)/%.o,.deps/out/$(IOSDEV_SHORT_TRIPLE)/%.o-deps,$(IOSDEV_OBJECTS)) + +ifneq ($(CIRCLE_BUILD_NUM),) +# on circleci we only build the macos library +ALL_LIBRARIES=$(MACOS_LIBRARY) +else +ALL_LIBRARIES=$(MACOS_LIBRARY) $(IOSSIM_LIBRARY) $(IOSDEV_LIBRARY) +endif + +ALL_TARGETS=$(ALL_LIBRARIES) +analyze_plists = $(C_SOURCES:%.c=out/analysis/%.plist) $(CPP_SOURCES:%.cpp=out/analysis/%.plist) $(OBJC_SOURCES:%.m=out/analysis/%.plist) +analyze:: $(analyze_plists) -class-test: $(C_SOURCES:%.c=%.o.osx) $(OBJC_SOURCES:%.m=%.o.osx) class-test.o.osx - @echo [$(CC) osx] $< - $(CC) -ObjC $(OSX_CFLAGS) -o $@ $(C_SOURCES:%.c=%.o.osx) $(OBJC_SOURCES:%.m=%.o.osx) class-test.o.osx ../external-deps/pcre-osx/.libs/libpcre16.a -framework Foundation -framework AppKit -lstdc++ +out/analysis/%.plist: %.c + @mkdir -p out/analysis + @echo [$(CC) analyze] $< && $(CC) $(MACOS_CFLAGS) --analyze $< -o $@ +out/analysis/%.plist: %.cpp + @mkdir -p out/analysis + @echo [$(CXX) analyze] $< && $(CXX) $(MACOS_CFLAGS) --analyze $< -o $@ --include $(patsubst out/$(OSX_TRIPLE)/%.o,.deps/$(OSX_TRIPLE)/%.o-deps,$(OSX_OBJECTS)) --include $(patsubst out/$(IOSSIM_TRIPLE)/%.o,.deps/$(IOSSIM_TRIPLE)/%.o-deps,$(IOSSIM_TRIPLE)) --include $(patsubst %.o.armv7,.deps/%.o.armv7-deps,$(DEV_OBJECTS)) --include $(patsubst %.o.armv7s,.deps/%.o.armv7s-deps,$(DEVS_OBJECTS)) +out/analysis/%.plist: %.m + @mkdir -p out/analysis + @echo [$(CC) analyze] $< && $(CC) $(MACOS_CFLAGS) --analyze $< -o $@ endif all-local:: $(ALL_TARGETS) @@ -270,6 +207,6 @@ install-local:: done clean-local:: - rm -f test $(ALL_OBJECTS) $(ALL_LIBRARIES) ejs-atoms-gen.c $(analyze_plists_c) $(analyze_plists_objc) + rm -f test $(ALL_OBJECTS) $(ALL_LIBRARIES) ejs-atoms-gen.c $(analyze_plists) include $(TOP)/build/build.mk diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 0fdc4396..b0976cb5 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -961,7 +961,7 @@ mark_from_modules() \ mark_pointers_in_range(&__end, &__r0); \ EJS_MACRO_END -#elif TARGET_CPU_AARCH64 +#elif TARGET_CPU_ARM64 #define MARK_REGISTERS #elif TARGET_CPU_AMD64 #define MARK_REGISTERS EJS_MACRO_START \ diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index be8a4d7d..771596dd 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -279,7 +279,7 @@ _ejs_generator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) (void*)gen->generator_context.__mcontext_data.__ss.__esp #elif TARGET_CPU_ARM (void*)gen->generator_context.__mcontext_data.__ss.__sp -#elif TARGET_CPU_AARCH64 +#elif TARGET_CPU_ARM64 (void*)gen->generator_context.__mcontext_data.__ss.__sp #else #error "unimplemented darwin cpu arch" From fe98549357550d7b8dfb3495a51fb26c34954515 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 15 Oct 2023 10:18:04 -0700 Subject: [PATCH 005/146] rename build -> mk --- Makefile | 4 ++-- ejs-llvm/Makefile | 4 ++-- external-deps/Makefile | 8 ++++---- lib/Makefile | 4 ++-- {build => mk}/.gitignore | 0 {build => mk}/build.mk | 0 {build => mk}/config.guess | 0 {build => mk}/config.mk | 0 {build => mk}/iOS.cmake | 0 {build => mk}/rules.mk | 0 {build => mk}/utils.mk | 0 node-compat/Makefile | 4 ++-- node-llvm/Makefile | 4 ++-- packaging/Makefile | 4 ++-- release/Makefile | 4 ++-- runtime/Makefile | 4 ++-- samples/Makefile | 4 ++-- samples/fetch/Makefile | 4 ++-- test/Makefile | 4 ++-- 19 files changed, 26 insertions(+), 26 deletions(-) rename {build => mk}/.gitignore (100%) rename {build => mk}/build.mk (100%) rename {build => mk}/config.guess (100%) rename {build => mk}/config.mk (100%) rename {build => mk}/iOS.cmake (100%) rename {build => mk}/rules.mk (100%) rename {build => mk}/utils.mk (100%) diff --git a/Makefile b/Makefile index 592ae0c1..7c09a528 100644 --- a/Makefile +++ b/Makefile @@ -1,6 +1,6 @@ TOP=$(shell pwd) -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk SUBDIRS=external-deps node-compat node-llvm ejs-llvm lib runtime @@ -104,4 +104,4 @@ ensure-submodules: git submodule update; \ fi -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/ejs-llvm/Makefile b/ejs-llvm/Makefile index 2627685f..86858920 100644 --- a/ejs-llvm/Makefile +++ b/ejs-llvm/Makefile @@ -1,6 +1,6 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk SOURCES= \ allocainst.cpp \ @@ -78,4 +78,4 @@ ejs-llvm.o: ejs-llvm-atoms-gen.c -include $(patsubst %.o,.deps/%.o-deps,$(OBJECTS)) -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/external-deps/Makefile b/external-deps/Makefile index f91ee7bc..e192e493 100644 --- a/external-deps/Makefile +++ b/external-deps/Makefile @@ -1,5 +1,5 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk LLVM_CXXFLAGS="`$LLVM_CONFIG --cxxflags` -fno-rtti" LLVM_LDFLAGS=`$LLVM_CONFIG --ldflags` @@ -45,12 +45,12 @@ clean-double-conversion: $(_TARGETS:%=clean-double-conversion-%) .stamp-configure-double-conversion-iossim: double-conversion/CMakeLists.txt @$(MKDIR) double-conversion-iossim (cd double-conversion-iossim && \ - cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../build/iOS.cmake -DIOS_PLATFORM=SIMULATOR64 -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSSIM_SYSROOT)) && touch $@ + cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../mk/iOS.cmake -DIOS_PLATFORM=SIMULATOR64 -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSSIM_SYSROOT)) && touch $@ .stamp-configure-double-conversion-iosdev: double-conversion/CMakeLists.txt @$(MKDIR) double-conversion-iosdev (cd double-conversion-iosdev && \ - cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../build/iOS.cmake -DIOS_PLATFORM=OS -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSDEV_SYSROOT)) && touch $@ + cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../mk/iOS.cmake -DIOS_PLATFORM=OS -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSDEV_SYSROOT)) && touch $@ .stamp-build-double-conversion-macos: .stamp-configure-double-conversion-macos $(MAKE) -C double-conversion-macos && touch $@ @@ -158,4 +158,4 @@ clean-pcre-linux: -@test -d pcre-linux && $(MAKE) -C pcre-linux clean @rm -f .stamp-build-pcre-linux -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/lib/Makefile b/lib/Makefile index 18781be6..c4c0ff1f 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -1,6 +1,6 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk ES6_SOURCES= \ abi.js \ @@ -116,4 +116,4 @@ $(DESTDIR)/lib/%.js: %.js .PRECIOUS: host-config.js -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/build/.gitignore b/mk/.gitignore similarity index 100% rename from build/.gitignore rename to mk/.gitignore diff --git a/build/build.mk b/mk/build.mk similarity index 100% rename from build/build.mk rename to mk/build.mk diff --git a/build/config.guess b/mk/config.guess similarity index 100% rename from build/config.guess rename to mk/config.guess diff --git a/build/config.mk b/mk/config.mk similarity index 100% rename from build/config.mk rename to mk/config.mk diff --git a/build/iOS.cmake b/mk/iOS.cmake similarity index 100% rename from build/iOS.cmake rename to mk/iOS.cmake diff --git a/build/rules.mk b/mk/rules.mk similarity index 100% rename from build/rules.mk rename to mk/rules.mk diff --git a/build/utils.mk b/mk/utils.mk similarity index 100% rename from build/utils.mk rename to mk/utils.mk diff --git a/node-compat/Makefile b/node-compat/Makefile index f44012f6..8608ab6e 100644 --- a/node-compat/Makefile +++ b/node-compat/Makefile @@ -1,6 +1,6 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk LIBRARY=libejsnodecompat-module.a C_SOURCES= \ @@ -126,4 +126,4 @@ install-local:: $(INSTALL) -c node-compat.ejs $(libdir) $(INSTALL) -c $(LIBRARY) $(archlibdir) -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/node-llvm/Makefile b/node-llvm/Makefile index 6827b232..6b14b179 100644 --- a/node-llvm/Makefile +++ b/node-llvm/Makefile @@ -1,6 +1,6 @@ TOP=.. --include $(TOP)/build/config.mk +-include $(TOP)/mk/config.mk LLVM_CONFIG=llvm-config$(LLVM_SUFFIX) @@ -30,4 +30,4 @@ configure: clean-local:: node-gyp clean --include $(TOP)/build/build.mk +-include $(TOP)/mk/build.mk diff --git a/packaging/Makefile b/packaging/Makefile index 6afd914d..358d9842 100644 --- a/packaging/Makefile +++ b/packaging/Makefile @@ -1,5 +1,5 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk PWD:=$(shell pwd) @@ -90,4 +90,4 @@ dist-local:: clean-local:: @rm -rf pkgtmp Scripts -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/release/Makefile b/release/Makefile index 8b02c9c8..c650988a 100644 --- a/release/Makefile +++ b/release/Makefile @@ -1,6 +1,6 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk TARBALL_DIR=$(PRODUCT_name)-$(PRODUCT_VERSION) libdir=$(TARBALL_DIR)/lib @@ -34,4 +34,4 @@ osx-tarball-deps: release-readme.md release-readme.md: release-readme.md.in @echo [gen] $< && sed -e "s,@PRODUCT_VERSION@,$(PRODUCT_VERSION)," $< > $@ -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/runtime/Makefile b/runtime/Makefile index c0fbb63c..3a17d8af 100644 --- a/runtime/Makefile +++ b/runtime/Makefile @@ -1,6 +1,6 @@ TOP=.. -include $(TOP)/build/config.mk +include $(TOP)/mk/config.mk LIBRARY=libecho.a C_SOURCES= \ @@ -209,4 +209,4 @@ install-local:: clean-local:: rm -f test $(ALL_OBJECTS) $(ALL_LIBRARIES) ejs-atoms-gen.c $(analyze_plists) -include $(TOP)/build/build.mk +include $(TOP)/mk/build.mk diff --git a/samples/Makefile b/samples/Makefile index 8b415170..a972e4f6 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -1,6 +1,6 @@ TOP=.. --include $(TOP)/build/config.mk +-include $(TOP)/mk/config.mk EJS_DRIVER?=$(TOP)/ejs @@ -17,4 +17,4 @@ trackmixcode: trackmixcode/trackmixcode.js all: trackmix trackmixcode --include $(TOP)/build/build.mk +-include $(TOP)/mk/build.mk diff --git a/samples/fetch/Makefile b/samples/fetch/Makefile index ddcc205b..b66ff537 100644 --- a/samples/fetch/Makefile +++ b/samples/fetch/Makefile @@ -1,6 +1,6 @@ TOP=../.. --include $(TOP)/build/config.mk +-include $(TOP)/mk/config.mk EJS_DRIVER?=$(TOP)/ejs @@ -9,4 +9,4 @@ fetch: fetch.js all-local:: fetch --include $(TOP)/build/build.mk +-include $(TOP)/mk/build.mk diff --git a/test/Makefile b/test/Makefile index 6343b8c8..049d1a94 100644 --- a/test/Makefile +++ b/test/Makefile @@ -1,6 +1,6 @@ TOP=.. --include $(TOP)/build/config.mk +-include $(TOP)/mk/config.mk .SILENT: @@ -94,4 +94,4 @@ compare-%: diff -us $$test_js.ll.stage0 $$test_js.ll.stage1; \ rm $$test_js.ll.stage0 $$test_js.ll.stage1 --include $(TOP)/build/build.mk +-include $(TOP)/mk/build.mk From f0ac5fdc34e197f504d9fee654f52a567f80e90d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 00:15:40 -0700 Subject: [PATCH 006/146] add buck2 build system covering the full bootstrap - BUCK files for external-deps (pcre autotools + double-conversion cmake genrules, parson, esprima/escodegen/estraverse/esutils filegroups), runtime (libecho, objc sources compiled via -x objective-c since the system cxx toolchain has no objc support, atoms/webgl genrules, llc'd invoke-closure-catch trampoline), ejs-llvm, node-compat, node-llvm (prebuilt addon for now) and lib (babel'd stage0 compiler) - //:srcdir-tree assembles a --srcdir-shaped tree from the above; //:ejs.exe.stage{1,2,3} run the bootstrap stages against it (stage1 = node-hosted stage0 compiler, ejs.exe aliases stage1) - defs.bzl centralizes triples/platform defines/llvm location ([llvm] section in .buckconfig, defaults to homebrew llvm@16) - prelude vendored as a submodule pinned to current buck2-prelude - header include paths in the runtime remapped through exported_headers so the repo-relative includes (external-deps/pcre/pcre.h etc) resolve - gen-atoms output compiled as a standalone TU by prepending includes in the genrule - nan bumped to 2.28 so node-llvm builds against node 22 Co-Authored-By: Claude Fable 5 --- .buckconfig | 23 ++++++ .buckroot | 0 .gitignore | 2 + .gitmodules | 3 + BUCK | 88 +++++++++++++++++++++ buck-srcdir-tree.sh | 83 ++++++++++++++++++++ buck-stage.sh | 58 ++++++++++++++ defs.bzl | 111 +++++++++++++++++++++++++++ ejs-llvm/BUCK | 72 +++++++++++++++++ external-deps/BUCK | 101 ++++++++++++++++++++++++ lib/BUCK | 48 ++++++++++++ lib/buck-gen-js.sh | 48 ++++++++++++ mk/build.mk | 4 +- node-compat/BUCK | 17 ++++ node-llvm/BUCK | 10 +++ package-lock.json | 19 +++-- package.json | 4 +- prelude | 1 + runtime/BUCK | 179 +++++++++++++++++++++++++++++++++++++++++++ runtime/ejs-dtoa.cpp | 2 +- runtime/ejs-init.c | 5 +- runtime/ejs-json.c | 2 +- runtime/ejs-regexp.c | 2 +- runtime/gen-atoms.js | 11 +-- toolchains/BUCK | 19 +++++ toolchains/llvm.bzl | 40 ++++++++++ 26 files changed, 930 insertions(+), 22 deletions(-) create mode 100644 .buckconfig create mode 100644 .buckroot create mode 100644 BUCK create mode 100644 buck-srcdir-tree.sh create mode 100644 buck-stage.sh create mode 100644 defs.bzl create mode 100644 ejs-llvm/BUCK create mode 100644 external-deps/BUCK create mode 100644 lib/BUCK create mode 100644 lib/buck-gen-js.sh create mode 100644 node-compat/BUCK create mode 100644 node-llvm/BUCK create mode 160000 prelude create mode 100644 runtime/BUCK create mode 100644 toolchains/BUCK create mode 100644 toolchains/llvm.bzl diff --git a/.buckconfig b/.buckconfig new file mode 100644 index 00000000..dce3cc4a --- /dev/null +++ b/.buckconfig @@ -0,0 +1,23 @@ +[repositories] +root = . +prelude = prelude +toolchains = toolchains +none = none + +[repository_aliases] +config = prelude +ovr_config = prelude +fbcode = none +fbsource = none +fbcode_macros = none +buck = none + +[parser] +target_platform_detector_spec = target:root//...->prelude//platforms:default + +[project] +ignore = .git + +[llvm] +prefix = /opt/homebrew/opt/llvm@16 +suffix = diff --git a/.buckroot b/.buckroot new file mode 100644 index 00000000..e69de29b diff --git a/.gitignore b/.gitignore index 5029811f..08cb452e 100644 --- a/.gitignore +++ b/.gitignore @@ -1,3 +1,5 @@ +/buck-out +.vscode/ **/.DS_Store *.slo *.lo diff --git a/.gitmodules b/.gitmodules index 27e3ef7b..ef154eee 100644 --- a/.gitmodules +++ b/.gitmodules @@ -22,3 +22,6 @@ [submodule "external-deps/double-conversion"] path = external-deps/double-conversion url = https://github.com/google/double-conversion.git +[submodule "prelude"] + path = prelude + url = https://github.com/facebook/buck2-prelude.git diff --git a/BUCK b/BUCK new file mode 100644 index 00000000..fe4a179e --- /dev/null +++ b/BUCK @@ -0,0 +1,88 @@ +load("//:defs.bzl", "EJS_OS", "EJS_SHORT_TRIPLE", "EJS_TRIPLE", "llvm_bindir") + +platform( + name = "linux-x86_64", + constraint_values = [ + "@config//os/constraints:linux", + "@config//cpu/constraints:x86_64", + ], +) + +platform( + name = "macos-arm64", + constraint_values = [ + "@config//os/constraints:macos", + "@config//cpu/constraints:arm64", + ], +) + +export_file( + name = "ejs-es6.js", + visibility = ["PUBLIC"], +) + +# A directory laid out the way `ejs --srcdir` expects a source checkout to +# look, containing everything needed to self-compile the compiler. +genrule( + name = "srcdir-tree", + srcs = ["buck-srcdir-tree.sh"], + out = "root", + cmd = "bash $SRCDIR/buck-srcdir-tree.sh" + + ' "' + EJS_TRIPLE + '"' + + ' "' + EJS_SHORT_TRIPLE + '"' + + ' "' + EJS_OS + '"' + + ' "$(location //runtime:headers)"' + + ' "$(location //runtime:echo[static])"' + + ' "$(location //runtime:platform-icc-o)"' + + ' "$(location //external-deps:pcre-build[lib])"' + + ' "$(location //external-deps:double-conversion-build)"' + + ' "$(location //external-deps:compiler-js)"' + + ' "$(location //lib:es6-srcs)"' + + ' "$(location //lib:host-config.js)"' + + ' "$(location :ejs-es6.js)"' + + ' "$(location //node-compat:node-compat.ejs)"' + + ' "$(location //node-compat:node-compat[static])"' + + ' "$(location //ejs-llvm:ejs-llvm.ejs)"' + + ' "$(location //ejs-llvm:ejs-llvm[static])"' + + ' "$(location //runtime:echo-dtoa[static])"' + + select({ + "DEFAULT": " -", + "config//os:macos": ' "$(location //runtime:echo-objc[static])"', + }), +) + +# stage1: the babel'd compiler running under node (with the node-llvm +# addon) compiles ejs-es6.js to a native executable. +genrule( + name = "ejs.exe.stage1", + srcs = ["buck-stage.sh"], + out = "ejs.exe.stage1", + cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" node ' + + '"$(location //lib:generated)" "$(location //node-llvm:llvm.node)" ' + + llvm_bindir(), +) + +# stage2: stage1 compiles the compiler. +genrule( + name = "ejs.exe.stage2", + srcs = ["buck-stage.sh"], + out = "ejs.exe.stage2", + cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" exe ' + + '"$(location :ejs.exe.stage1)" - ' + llvm_bindir(), +) + +# stage3: stage2 compiles the compiler; stage2 and stage3 should be +# functionally identical if the bootstrap is healthy. +genrule( + name = "ejs.exe.stage3", + srcs = ["buck-stage.sh"], + out = "ejs.exe.stage3", + cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" exe ' + + '"$(location :ejs.exe.stage2)" - ' + llvm_bindir(), +) + +# `make` (all) builds stage1 and installs it as ejs.exe; mirror that. +alias( + name = "ejs.exe", + actual = ":ejs.exe.stage1", +) diff --git a/buck-srcdir-tree.sh b/buck-srcdir-tree.sh new file mode 100644 index 00000000..6d88a428 --- /dev/null +++ b/buck-srcdir-tree.sh @@ -0,0 +1,83 @@ +#!/bin/bash +# Invoked by //:srcdir-tree. Assembles a directory that looks enough like +# a source checkout for `ejs --srcdir` to compile ejs-es6.js in it: +# +# ejs-es6.js compiler driver source +# lib/*.js, lib/passes/*.js compiler sources (incl. host-config.js) +# external-deps/ JS modules the compiler imports +# external-deps/pcre-/.libs/libpcre16.a +# external-deps/double-conversion-/double-conversion/libdouble-conversion.a +# runtime/*.h passed via -I at the final link +# runtime/out//libecho.a runtime + parson + invoke-closure-catch.o +# node-compat/{node-compat.ejs,libejsnodecompat-module.a} +# ejs-llvm/{ejs-llvm.ejs,libejsllvm-module.a} +set -euo pipefail + +TRIPLE="$1" # Triple.toString(), e.g. arm64-apple-macos +SHORT_TRIPLE="$2" # Triple.toShortString(), e.g. arm64-macos +OSNAME="$3" # macos | linux (also selects ar vs libtool merge below) +HDRS="$4" # //runtime:headers +LIBECHO="$5" # //runtime:echo[static] +ICC_O="$6" # //runtime:platform-icc-o +PCRE_A="$7" # //external-deps:pcre-build[lib] +DC_A="$8" # //external-deps:double-conversion-build +EXT_JS="$9" # //external-deps:compiler-js +LIB_JS="${10}" # //lib:es6-srcs +HOST_CONFIG="${11}" # //lib:host-config.js +EJS_MAIN="${12}" # //:ejs-es6.js +NC_EJS="${13}" # //node-compat:node-compat.ejs +NC_A="${14}" # //node-compat:node-compat[static] +LLVM_EJS="${15}" # //ejs-llvm:ejs-llvm.ejs +LLVM_A="${16}" # //ejs-llvm:ejs-llvm[static] +DTOA_A="${17}" # //runtime:echo-dtoa[static] +OBJC_A="${18}" # //runtime:echo-objc[static] on macos, "-" elsewhere + +mkdir -p "$OUT" +ROOT="$(cd "$OUT" && pwd)" + +# runtime headers + libecho.a: merge the runtime archives (C, C++, objc) +# and the llc'd trampoline object into the single archive the compiler +# links against, the way runtime/Makefile produces it. +mkdir -p "$ROOT/runtime/out/$TRIPLE" +cp -RL "$HDRS"/. "$ROOT/runtime/" +LIB="$ROOT/runtime/out/$TRIPLE/libecho.a" +cp "$ICC_O" "$TMP/ejs-invoke-closure-catch.o" +ARCHIVES=("$LIBECHO" "$DTOA_A") +if [ "$OBJC_A" != "-" ]; then + ARCHIVES+=("$OBJC_A") +fi +if [ "$OSNAME" = "macos" ]; then + libtool -static -o "$LIB" "${ARCHIVES[@]}" "$TMP/ejs-invoke-closure-catch.o" 2>/dev/null +else + MERGE="$TMP/libecho-merge" + rm -rf "$MERGE" + mkdir -p "$MERGE" + for a in "${ARCHIVES[@]}"; do + (cd "$MERGE" && ar x "$(cd "$(dirname "$a")" && pwd)/$(basename "$a")") + done + ar rs "$LIB" "$MERGE"/*.o "$TMP/ejs-invoke-closure-catch.o" +fi +# some spots use the short triple for the runtime dir; provide both +mkdir -p "$ROOT/runtime/out/$SHORT_TRIPLE" +cp "$LIB" "$ROOT/runtime/out/$SHORT_TRIPLE/libecho.a" + +# external-deps: static libs where --srcdir mode expects them + JS modules +mkdir -p "$ROOT/external-deps/pcre-$OSNAME/.libs" +cp "$PCRE_A" "$ROOT/external-deps/pcre-$OSNAME/.libs/libpcre16.a" +mkdir -p "$ROOT/external-deps/double-conversion-$OSNAME/double-conversion" +cp "$DC_A" "$ROOT/external-deps/double-conversion-$OSNAME/double-conversion/libdouble-conversion.a" +cp -RL "$EXT_JS"/. "$ROOT/external-deps/" + +# compiler sources +mkdir -p "$ROOT/lib" +cp -RL "$LIB_JS"/. "$ROOT/lib/" +cp "$HOST_CONFIG" "$ROOT/lib/host-config.js" +cp "$EJS_MAIN" "$ROOT/ejs-es6.js" + +# native modules +mkdir -p "$ROOT/node-compat" +cp "$NC_EJS" "$ROOT/node-compat/node-compat.ejs" +cp "$NC_A" "$ROOT/node-compat/libejsnodecompat-module.a" +mkdir -p "$ROOT/ejs-llvm" +cp "$LLVM_EJS" "$ROOT/ejs-llvm/ejs-llvm.ejs" +cp "$LLVM_A" "$ROOT/ejs-llvm/libejsllvm-module.a" diff --git a/buck-stage.sh b/buck-stage.sh new file mode 100644 index 00000000..4ba5229d --- /dev/null +++ b/buck-stage.sh @@ -0,0 +1,58 @@ +#!/bin/bash +# Invoked by //:ejs.exe.stage{1,2,3}. Copies the --srcdir tree into a +# writable work dir and self-compiles ejs-es6.js in it, either with the +# node-hosted stage0 compiler or with the previous stage's executable. +set -euo pipefail + +TREE="$1" # //:srcdir-tree +MODE="$2" # "node" (stage0 compiler) or "exe" (previous stage binary) +COMPILER="$3" # node: //lib:generated dir; exe: previous ejs.exe.stageN +LLVM_NODE="$4" # node: //node-llvm:llvm.node; exe: "-" +LLVM_BIN="$5" # directory holding llc/opt (and llvm-config) + +abspath() { + if [ -d "$1" ]; then + (cd "$1" && pwd) + else + echo "$(cd "$(dirname "$1")" && pwd)/$(basename "$1")" + fi +} + +OUT_ABS="$(cd "$(dirname "$OUT")" && pwd)/$(basename "$OUT")" +COMPILER_ABS="$(abspath "$COMPILER")" +if [ "$LLVM_NODE" != "-" ]; then + LLVM_NODE_ABS="$(abspath "$LLVM_NODE")" +fi + +WORK="$TMP/work" +rm -rf "$WORK" +mkdir -p "$WORK" +cp -RL "$TREE"/. "$WORK/" +chmod -R u+w "$WORK" + +cd "$WORK" + +# llc/opt for codegen; Apple clang++ for the final link on macOS so SDK +# discovery works. +export PATH="$LLVM_BIN:$PATH" +if [ "$(uname -s)" = "Darwin" ]; then + export CXX="${CXX:-/usr/bin/clang++}" + export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" +fi + +EJS_ARGS=(--srcdir --leave-temp --moduledir node-compat --moduledir ejs-llvm ejs-es6.js) + +if [ "$MODE" = "node" ]; then + mkdir -p lib/generated + cp -RL "$COMPILER_ABS"/. lib/generated/ + NODE_PATH="$(dirname "$LLVM_NODE_ABS")" \ + node lib/generated/ejs-es6.js "${EJS_ARGS[@]}" +else + cp "$COMPILER_ABS" ./ejs.exe.prev + chmod +x ./ejs.exe.prev + ./ejs.exe.prev "${EJS_ARGS[@]}" +fi + +test -f ejs-es6.js.exe +cp ejs-es6.js.exe "$OUT_ABS" +chmod +x "$OUT_ABS" diff --git a/defs.bzl b/defs.bzl new file mode 100644 index 00000000..1e237e8b --- /dev/null +++ b/defs.bzl @@ -0,0 +1,111 @@ +# Shared definitions for the EchoJS buck2 build. + +def llvm_prefix(): + return read_config("llvm", "prefix", "/opt/homebrew/opt/llvm@16") + +def llvm_suffix(): + return read_config("llvm", "suffix", "") + +def llvm_bindir(): + return llvm_prefix() + "/bin" + +def llvm_bin(tool): + return "{}/{}{}".format(llvm_bindir(), tool, llvm_suffix()) + +# Triple as lib/triple.js Triple.toString() renders the host triple +# (arch-vendor-os). Used for the runtime/out/ directory the +# compiler looks in when running with --srcdir. +EJS_TRIPLE = select({ + "config//os:linux": select({ + "config//cpu:arm64": "arm64-unknown-linux", + "config//cpu:x86_64": "x86_64-unknown-linux", + }), + "config//os:macos": select({ + "config//cpu:arm64": "arm64-apple-macos", + "config//cpu:x86_64": "x86_64-apple-macos", + }), +}) + +# Triple.toShortString() (arch-os), which is what the Makefiles call +# SHORT_TRIPLE and what node-compat.ejs keys its module_file map on. +EJS_SHORT_TRIPLE = select({ + "config//os:linux": select({ + "config//cpu:arm64": "arm64-linux", + "config//cpu:x86_64": "x86_64-linux", + }), + "config//os:macos": select({ + "config//cpu:arm64": "arm64-macos", + "config//cpu:x86_64": "x86_64-macos", + }), +}) + +# Short os name used for the external-deps build directory names +# (pcre-macos, double-conversion-linux, ...). +EJS_OS = select({ + "config//os:linux": "linux", + "config//os:macos": "macos", +}) + +# GNU-style triple passed to autoconf --build (old config.guess scripts +# in the pcre submodule don't recognize arm64 macs). +GNU_TRIPLE = select({ + "config//os:linux": select({ + "config//cpu:arm64": "aarch64-unknown-linux-gnu", + "config//cpu:x86_64": "x86_64-unknown-linux-gnu", + }), + "config//os:macos": select({ + "config//cpu:arm64": "aarch64-apple-darwin", + "config//cpu:x86_64": "x86_64-apple-darwin", + }), +}) + +# -mtriple for llc when compiling the .ll runtime sources. +LLC_MTRIPLE = select({ + "config//os:linux": select({ + "config//cpu:arm64": "aarch64-unknown-linux-gnu", + "config//cpu:x86_64": "x86_64-unknown-linux-gnu", + }), + "config//os:macos": select({ + "config//cpu:arm64": "arm64-apple-macosx11.0.0", + "config//cpu:x86_64": "x86_64-apple-macosx11.0.0", + }), +}) + +# The runloop implementation baked into lib/host-config.js. +EJS_RUNLOOP_IMPL = select({ + "config//os:linux": "libuv", + "config//os:macos": "darwin", +}) + +# Mirrors CFLAGS + per-target defines from mk/config.mk. +EJS_COMPILER_FLAGS = [ + "-g", + "-O0", + "-Wall", + "-Wno-unused-function", + "-Wno-unused-variable", +] + select({ + "config//os:linux": [ + "-DTARGET_LINUX=1", + "-D_GNU_SOURCE", + ], + "config//os:macos": [ + "-DOSX=1", + "-DTARGET_MACOS=1", + "-D_XOPEN_SOURCE", + "-Wno-deprecated-declarations", + ], +}) + select({ + "config//cpu:arm64": [ + # both spellings are in use (ejs-gc.c vs ejs-node-compat.c) + "-DTARGET_CPU_ARM64=1", + "-DTARGET_CPU_AARCH64=1", + "-DEJS_BITS_PER_WORD=64", + "-DIS_LITTLE_ENDIAN=1", + ], + "config//cpu:x86_64": [ + "-DTARGET_CPU_AMD64=1", + "-DEJS_BITS_PER_WORD=64", + "-DIS_LITTLE_ENDIAN=1", + ], +}) diff --git a/ejs-llvm/BUCK b/ejs-llvm/BUCK new file mode 100644 index 00000000..45b9a0e2 --- /dev/null +++ b/ejs-llvm/BUCK @@ -0,0 +1,72 @@ +load("//:defs.bzl", "EJS_COMPILER_FLAGS", "llvm_bin", "llvm_prefix") + +genrule( + name = "atoms", + srcs = [ + "ejs-llvm-atoms.h", + "//runtime:gen-atoms.js", + ], + out = "ejs-llvm-atoms-gen.c", + cmd = "node $SRCDIR/gen-atoms.js $SRCDIR/ejs-llvm-atoms.h > $OUT", +) + +# The .ejs module descriptor, with the link flags the EJS compiler must pass +# when linking a program that imports @llvm. +genrule( + name = "ejs-llvm.ejs", + srcs = ["ejs-llvm.ejs.in"], + out = "ejs-llvm.ejs", + cmd = 'set -e; LINK_FLAGS="`' + llvm_bin("llvm-config") + " --ldflags --libs | tr '\\n' ' '`" + + select({ + "DEFAULT": "", + "config//os:macos": " -lcurses", + }) + + '"; sed -e "s%@EJS_VERSION@%0.1.0%" -e "s%@LLVM_LINK_FLAGS@%$LINK_FLAGS%" $SRCDIR/ejs-llvm.ejs.in > $OUT', + visibility = ["PUBLIC"], +) + +sources = [ + "allocainst.cpp", + "arraytype.cpp", + "basicblock.cpp", + "callinvoke.cpp", + "constant.cpp", + "constantarray.cpp", + "constantfp.cpp", + "dibuilder.cpp", + "ejs-llvm.cpp", + "function.cpp", + "functiontype.cpp", + "globalvariable.cpp", + "irbuilder.cpp", + "landingpad.cpp", + "loadinst.cpp", + "module.cpp", + "structtype.cpp", + "switch.cpp", + "type.cpp", + "value.cpp", +] + +cxx_library( + name = "ejs-llvm", + srcs = sources, + header_namespace = "", + headers = dict( + [(h, h) for h in glob(["*.h"])] + + [("ejs-llvm-atoms-gen.c", ":atoms")], + ), + compiler_flags = EJS_COMPILER_FLAGS + [ + "-std=c++17", + "-I" + llvm_prefix() + "/include", + "-fno-rtti", + "-D__STDC_CONSTANT_MACROS", + "-D__STDC_FORMAT_MACROS", + "-D__STDC_LIMIT_MACROS", + "-Wno-c99-extensions", + "-Wno-gnu-statement-expression", + ], + preferred_linkage = "static", + deps = ["//runtime:echo"], + visibility = ["PUBLIC"], +) diff --git a/external-deps/BUCK b/external-deps/BUCK new file mode 100644 index 00000000..85690bbc --- /dev/null +++ b/external-deps/BUCK @@ -0,0 +1,101 @@ +load("//:defs.bzl", "GNU_TRIPLE") + +# --------------------------------------------------------------------------- +# parson: compiled directly into libecho (see //runtime:echo), we just +# export the source and a header mapped to the repo-relative include path +# the runtime sources use. +# --------------------------------------------------------------------------- + +export_file( + name = "parson.c", + src = "parson/parson.c", + visibility = ["PUBLIC"], +) + +cxx_library( + name = "parson-headers", + header_namespace = "", + exported_headers = { + "external-deps/parson/parson.h": "parson/parson.h", + # parson.c itself includes it unqualified + "parson.h": "parson/parson.h", + }, + visibility = ["PUBLIC"], +) + +# --------------------------------------------------------------------------- +# pcre: autotools build. Produces libpcre16.a plus the configure-generated +# pcre.h that runtime/ejs-regexp.c includes as "external-deps/pcre/pcre.h". +# --------------------------------------------------------------------------- + +genrule( + name = "pcre-build", + srcs = glob(["pcre/**"]), + outs = { + "lib": ["libpcre16.a"], + "header": ["pcre.h"], + }, + default_outs = ["libpcre16.a"], + cmd = 'set -e; BUILD="$TMP/pcre-build"; mkdir -p "$BUILD"; ' + + 'SRC="$PWD/$SRCDIR/pcre"; ' + + '(cd "$BUILD" && "$SRC/configure" --build=' + GNU_TRIPLE + + ' --enable-pcre16 --enable-utf --disable-cpp >configure.log 2>&1 && ' + + 'make pcre_chartables.c libpcre16.la >build.log 2>&1) || { cat "$BUILD"/*.log; exit 1; }; ' + + 'cp "$BUILD/.libs/libpcre16.a" "$OUT/libpcre16.a"; ' + + 'cp "$BUILD/pcre.h" "$OUT/pcre.h"', + visibility = ["PUBLIC"], +) + +cxx_library( + name = "pcre-headers", + header_namespace = "", + exported_headers = { + "external-deps/pcre/pcre.h": ":pcre-build[header]", + }, + visibility = ["PUBLIC"], +) + +# --------------------------------------------------------------------------- +# double-conversion: cmake build for the static lib; headers come straight +# from the source tree, remapped to the repo-relative include path +# runtime/ejs-dtoa.cpp uses. +# --------------------------------------------------------------------------- + +genrule( + name = "double-conversion-build", + srcs = glob(["double-conversion/**"]), + out = "libdouble-conversion.a", + cmd = 'set -e; BUILD="$TMP/dc-build"; mkdir -p "$BUILD"; ' + + 'SRC="$PWD/$SRCDIR/double-conversion"; ' + + '(cd "$BUILD" && cmake -DCMAKE_POLICY_VERSION_MINIMUM=3.5 -DCMAKE_BUILD_TYPE=Release "$SRC" >cmake.log 2>&1 && ' + + 'make >build.log 2>&1) || { cat "$BUILD"/*.log; exit 1; }; ' + + 'cp "$BUILD/double-conversion/libdouble-conversion.a" "$OUT"', + visibility = ["PUBLIC"], +) + +cxx_library( + name = "double-conversion-headers", + header_namespace = "", + exported_headers = { + "external-deps/double-conversion/" + h.removeprefix("double-conversion/double-conversion/"): h + for h in glob(["double-conversion/double-conversion/*.h"]) + }, + visibility = ["PUBLIC"], +) + +# --------------------------------------------------------------------------- +# JS sources for the compiler itself (esprima & friends), staged into the +# --srcdir tree and fed through babel for the stage0 (node-hosted) compiler. +# --------------------------------------------------------------------------- + +filegroup( + name = "compiler-js", + srcs = glob([ + "esprima/esprima-es6.js", + "escodegen/escodegen-es6.js", + "estraverse/estraverse-es6.js", + "esutils/esutils-es6.js", + "esutils/lib/*.js", + ]), + visibility = ["PUBLIC"], +) diff --git a/lib/BUCK b/lib/BUCK new file mode 100644 index 00000000..98b5c22f --- /dev/null +++ b/lib/BUCK @@ -0,0 +1,48 @@ +load("//:defs.bzl", "EJS_RUNLOOP_IMPL", "llvm_suffix") + +genrule( + name = "host-config.js", + srcs = ["host-config.js.in"], + out = "host-config.js", + cmd = 'sed -e "s,@LLVM_SUFFIX@,' + llvm_suffix() + ',g" ' + + '-e "s,@RUNLOOP_IMPL@,' + EJS_RUNLOOP_IMPL + ',g" ' + + "$SRCDIR/host-config.js.in > $OUT", + visibility = ["PUBLIC"], +) + +# The ES6 compiler sources as they are staged into the --srcdir tree for +# self-compilation (host-config.js is added there separately since it is +# generated). +filegroup( + name = "es6-srcs", + srcs = glob( + [ + "*.js", + "passes/*.js", + ], + exclude = ["host-config.js"], + ), + visibility = ["PUBLIC"], +) + +# The node-runnable (stage0) compiler: babel-compiled equivalents of +# ejs-es6.js, lib/*.js and the esprima/escodegen/... support modules. +# Layout matches lib/generated/ from the Makefile build. +genrule( + name = "generated", + srcs = glob( + [ + "*.js", + "passes/*.js", + ], + exclude = ["host-config.js"], + ) + [ + "buck-gen-js.sh", + ":host-config.js", + "//:ejs-es6.js", + "//external-deps:compiler-js", + ], + out = "generated", + cmd = "bash $SRCDIR/buck-gen-js.sh", + visibility = ["PUBLIC"], +) diff --git a/lib/buck-gen-js.sh b/lib/buck-gen-js.sh new file mode 100644 index 00000000..a416f773 --- /dev/null +++ b/lib/buck-gen-js.sh @@ -0,0 +1,48 @@ +#!/bin/bash +# Invoked by //lib:generated. Produces the equivalent of lib/generated/: +# the compiler sources run through babel (so stage0 can run under node), +# with the same import rewrites lib/Makefile applies: +# "@llvm" -> "llvm" (resolved via NODE_PATH to node-llvm) +# "@node-compat/"-> "" (use node's own os/path/fs/...) +# +# babel and its presets come from the repo's node_modules, which buck2 +# doesn't track as an input (mirrors the Makefile treating node_modules as +# an ambient dev dependency). The repo root is recovered from $TMP, which +# buck2 always places under /buck-out/. +set -euo pipefail + +REPO="${TMP%%/buck-out/*}" +BABEL_JS="$REPO/node_modules/@babel/cli/bin/babel.js" +BABELRC="$REPO/.babelrc" + +mkdir -p "$OUT" +OUTABS="$(cd "$OUT" && pwd)" + +run_babel() { + local src="$1" dst="$2" + mkdir -p "$(dirname "$dst")" + node "$BABEL_JS" --config-file "$BABELRC" "$src" \ + | sed -e 's,"@llvm","llvm",' -e "s,'@llvm','llvm'," -e 's,@node-compat/,,' \ + > "$dst" +} + +cd "$SRCDIR" + +for f in *.js passes/*.js; do + case "$f" in + ejs-es6.js) continue ;; + esac + run_babel "$f" "$OUTABS/lib/$f" +done + +run_babel ejs-es6.js "$OUTABS/ejs-es6.js" + +for f in esprima/esprima-es6.js \ + escodegen/escodegen-es6.js \ + estraverse/estraverse-es6.js \ + esutils/esutils-es6.js \ + esutils/lib/code.js \ + esutils/lib/ast.js \ + esutils/lib/keyword.js; do + run_babel "compiler-js/$f" "$OUTABS/external-deps/$f" +done diff --git a/mk/build.mk b/mk/build.mk index 1f72364e..b278c1d3 100644 --- a/mk/build.mk +++ b/mk/build.mk @@ -1,2 +1,2 @@ -include $(TOP)/build/utils.mk -include $(TOP)/build/rules.mk +include $(TOP)/mk/utils.mk +include $(TOP)/mk/rules.mk diff --git a/node-compat/BUCK b/node-compat/BUCK new file mode 100644 index 00000000..2f103977 --- /dev/null +++ b/node-compat/BUCK @@ -0,0 +1,17 @@ +load("//:defs.bzl", "EJS_COMPILER_FLAGS") + +export_file( + name = "node-compat.ejs", + visibility = ["PUBLIC"], +) + +cxx_library( + name = "node-compat", + srcs = ["ejs-node-compat.c"], + header_namespace = "", + exported_headers = glob(["*.h"]), + compiler_flags = EJS_COMPILER_FLAGS, + preferred_linkage = "static", + deps = ["//runtime:echo"], + visibility = ["PUBLIC"], +) diff --git a/node-llvm/BUCK b/node-llvm/BUCK new file mode 100644 index 00000000..f24ae743 --- /dev/null +++ b/node-llvm/BUCK @@ -0,0 +1,10 @@ +# The node native addon that gives the node-hosted (stage0) compiler access +# to LLVM. Built out-of-band with node-gyp (`make -C node-llvm`); buck just +# picks up the built addon. +# +# TODO(buck2): drive node-gyp from a genrule so this is built hermetically. +export_file( + name = "llvm.node", + src = "build/Release/llvm.node", + visibility = ["PUBLIC"], +) diff --git a/package-lock.json b/package-lock.json index 04cbaeb6..3d2931be 100644 --- a/package-lock.json +++ b/package-lock.json @@ -15,12 +15,14 @@ "colors": "^1.4.0", "glob": "^10.3.4", "mocha": "^10.2.0", - "nan": "^2.18.0", "prettier": "^3.0.3", "temp": "^0.9.4" }, "bin": { "ejs": "ejs-driver.js" + }, + "devDependencies": { + "nan": "^2.28.0" } }, "node_modules/@ampproject/remapping": { @@ -3592,9 +3594,11 @@ "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==" }, "node_modules/nan": { - "version": "2.18.0", - "resolved": "https://registry.npmjs.org/nan/-/nan-2.18.0.tgz", - "integrity": "sha512-W7tfG7vMOGtD30sHoZSSc/JVYiyDPEyQVso/Zz+/uQd0B0L46gtC+pHha5FFMRpil6fm/AoEcRWyOVi4+E/f8w==" + "version": "2.28.0", + "resolved": "https://registry.npmjs.org/nan/-/nan-2.28.0.tgz", + "integrity": "sha512-fTsDz99OTq2sVePhGdp4qQhggZFtKr64ZNVyVajRKtMOkJxYekplBh577PiJB12v/D3s2E5cGtOI45LWp6rnLQ==", + "dev": true, + "license": "MIT" }, "node_modules/nanoid": { "version": "3.3.3", @@ -7193,9 +7197,10 @@ "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==" }, "nan": { - "version": "2.18.0", - "resolved": "https://registry.npmjs.org/nan/-/nan-2.18.0.tgz", - "integrity": "sha512-W7tfG7vMOGtD30sHoZSSc/JVYiyDPEyQVso/Zz+/uQd0B0L46gtC+pHha5FFMRpil6fm/AoEcRWyOVi4+E/f8w==" + "version": "2.28.0", + "resolved": "https://registry.npmjs.org/nan/-/nan-2.28.0.tgz", + "integrity": "sha512-fTsDz99OTq2sVePhGdp4qQhggZFtKr64ZNVyVajRKtMOkJxYekplBh577PiJB12v/D3s2E5cGtOI45LWp6rnLQ==", + "dev": true }, "nanoid": { "version": "3.3.3", diff --git a/package.json b/package.json index 3448ce7b..48aaff36 100644 --- a/package.json +++ b/package.json @@ -57,8 +57,10 @@ "colors": "^1.4.0", "glob": "^10.3.4", "mocha": "^10.2.0", - "nan": "^2.18.0", "prettier": "^3.0.3", "temp": "^0.9.4" + }, + "devDependencies": { + "nan": "^2.28.0" } } diff --git a/prelude b/prelude new file mode 160000 index 00000000..023cf61f --- /dev/null +++ b/prelude @@ -0,0 +1 @@ +Subproject commit 023cf61fbeb5d5208ec32731f7869b4b7a853613 diff --git a/runtime/BUCK b/runtime/BUCK new file mode 100644 index 00000000..86d4179b --- /dev/null +++ b/runtime/BUCK @@ -0,0 +1,179 @@ +load("//:defs.bzl", "EJS_COMPILER_FLAGS", "LLC_MTRIPLE", "llvm_bin") + +export_file( + name = "gen-atoms.js", + visibility = ["PUBLIC"], +) + +genrule( + name = "atoms", + srcs = [ + "ejs-atoms.h", + "gen-atoms.js", + ], + out = "ejs-atoms-gen.c", + # gen-atoms.js emits definitions only; add the includes it needs to + # compile as a standalone translation unit + cmd = "{ printf '#include \"ejs.h\"\\n#include \"ejs-value.h\"\\n#include \"ejs-string.h\"\\n\\n'; " + + "node $SRCDIR/gen-atoms.js $SRCDIR/ejs-atoms.h; } > $OUT", +) + +genrule( + name = "webgl-constants-sorted", + srcs = ["ejs-webgl-constants.h"], + out = "ejs-webgl-constants-sorted.h", + cmd = "grep WEBGL_CONSTANT $SRCDIR/ejs-webgl-constants.h | sort > $OUT", +) + +# The invoke-closure trampoline is hand-written IR; llc it to an object +# that gets appended into libecho.a when the --srcdir tree is staged +# (see //:srcdir-tree). +genrule( + name = "platform-icc-o", + srcs = ["ejs-invoke-closure-catch.ll"], + out = "ejs-invoke-closure-catch.o", + cmd = llvm_bin("llc") + " -mtriple=" + LLC_MTRIPLE + + " --relocation-model=pic -filetype=obj -O2 -o $OUT $SRCDIR/ejs-invoke-closure-catch.ll", + visibility = ["PUBLIC"], +) + +# Staged as runtime/ in the --srcdir tree; the compiler passes -I runtime +# to the final link. +filegroup( + name = "headers", + # exclude the make-generated file that may be lying around in a dirty + # worktree; buck generates its own (:webgl-constants-sorted) + srcs = glob(["*.h"], exclude = ["ejs-webgl-constants-sorted.h"]), + visibility = ["PUBLIC"], +) + +shared_sources = [ + "ejs-arguments.c", + "ejs-array.c", + "ejs-boolean.c", + "ejs-closureenv.c", + "ejs-console.c", + "ejs-date.c", + "ejs-error.c", + "ejs-exception.c", + "ejs-function.c", + "ejs-gc.c", + "ejs-generator.c", + "ejs-init.c", + "ejs-json.c", + "ejs-map.c", + "ejs-math.c", + "ejs-module.c", + "ejs-number.c", + "ejs-object.c", + "ejs-ops.c", + "ejs-process.c", + "ejs-promise.c", + "ejs-proxy.c", + "ejs-recording.c", + "ejs-reflect.c", + "ejs-regexp.c", + "ejs-require.c", + "ejs-set.c", + "ejs-stream.c", + "ejs-string.c", + "ejs-symbol.c", + "ejs-timers.c", + "ejs-typedarrays.c", + "ejs-types.c", + "ejs-uri.c", + "ejs-weakmap.c", + "ejs-weakset.c", + "main.c", +] + +darwin_sources = [ + "ejs-jsobjc.m", + "ejs-log.m", + "ejs-objc.m", + "ejs-webgl.m", + "ejs-xhr.m", + "ejs-runloop-darwin.m", +] + +cxx_library( + name = "echo", + srcs = shared_sources + [ + ":atoms", + "//external-deps:parson.c", + ] + select({ + "DEFAULT": ["ejs-runloop-noop.c"], + "config//os:linux": ["ejs-runloop-libuv.c"], + # the darwin (objc) sources live in :echo-objc; the system cxx + # toolchain has no objc compiler + "config//os:macos": [], + }), + header_namespace = "", + exported_headers = glob(["*.h"], exclude = ["ejs-webgl-constants-sorted.h"]), + headers = { + "ejs-webgl-constants-sorted.h": ":webgl-constants-sorted", + }, + compiler_flags = EJS_COMPILER_FLAGS + select({ + "DEFAULT": [], + # several runtime headers use objc types on macos, so the C sources + # get compiled as objective-c, same as the -ObjC in runtime/Makefile + "config//os:macos": [ + "-x", + "objective-c", + "-fno-objc-arc", + ], + }), + preferred_linkage = "static", + deps = [ + "//external-deps:double-conversion-headers", + "//external-deps:parson-headers", + "//external-deps:pcre-headers", + ], + visibility = ["PUBLIC"], +) + +# C++ half of the runtime; kept separate so the -x objective-c above doesn't +# apply to it. Merged into libecho.a by //:srcdir-tree. +cxx_library( + name = "echo-dtoa", + srcs = ["ejs-dtoa.cpp"], + header_namespace = "", + compiler_flags = EJS_COMPILER_FLAGS, + preferred_linkage = "static", + deps = [ + ":echo", + "//external-deps:double-conversion-headers", + ], + visibility = ["PUBLIC"], +) + +# The prelude's system cxx toolchain can't compile .m files, so alias them +# to .c and force the language with -x objective-c. The resulting archive +# is merged into libecho.a by //:srcdir-tree (libtool -static). +[ + genrule( + name = m + ".c", + srcs = [m], + out = m + ".c", + cmd = "cp $SRCDIR/" + m + " $OUT", + ) + for m in darwin_sources +] + +cxx_library( + name = "echo-objc", + srcs = [":" + m + ".c" for m in darwin_sources], + header_namespace = "", + headers = { + "ejs-webgl-constants-sorted.h": ":webgl-constants-sorted", + }, + compiler_flags = EJS_COMPILER_FLAGS + [ + "-x", + "objective-c", + "-DOBJC=1", + "-fno-objc-arc", + ], + preferred_linkage = "static", + deps = [":echo"], + visibility = ["PUBLIC"], +) diff --git a/runtime/ejs-dtoa.cpp b/runtime/ejs-dtoa.cpp index 67b64b09..edfbc74e 100644 --- a/runtime/ejs-dtoa.cpp +++ b/runtime/ejs-dtoa.cpp @@ -1,5 +1,5 @@ #include -#include "double-conversion/double-conversion.h" +#include "external-deps/double-conversion/double-conversion.h" using namespace double_conversion; diff --git a/runtime/ejs-init.c b/runtime/ejs-init.c index 8ab1a4b1..27c8edf3 100644 --- a/runtime/ejs-init.c +++ b/runtime/ejs-init.c @@ -45,6 +45,9 @@ #include "ejs-proxy.h" #include "ejs-reflect.h" +// lives in ejs-atoms-gen.c +extern void _ejs_init_static_strings(); + const ejsval _ejs_undefined EJSVAL_ALIGNMENT = STATIC_BUILD_EJSVAL(EJSVAL_TAG_UNDEFINED, 0); ejsval _ejs_nan; const ejsval _ejs_Infinity EJSVAL_ALIGNMENT = STATIC_BUILD_DOUBLE_EJSVAL(HUGE_VAL); @@ -57,8 +60,6 @@ const ejsval _ejs_one EJSVAL_ALIGNMENT = STATIC_BUILD_DOUBLE_EJSVAL(1); ejsval _ejs__ejs EJSVAL_ALIGNMENT; ejsval _ejs_global EJSVAL_ALIGNMENT; -/* useful strings literals */ -#include "ejs-atoms-gen.c" EJS_NATIVE_FUNC(_ejs_eval) { _ejs_throw_nativeerror_utf8 (EJS_ERROR, "EJS doesn't support eval()"); diff --git a/runtime/ejs-json.c b/runtime/ejs-json.c index 00e2ed5f..ea4991ba 100644 --- a/runtime/ejs-json.c +++ b/runtime/ejs-json.c @@ -15,7 +15,7 @@ #include "ejs-string.h" #include "ejs-boolean.h" #include "ejs-symbol.h" -#include "../parson/parson.h" +#include "external-deps/parson/parson.h" ejsval _ejs_JSON EJSVAL_ALIGNMENT; diff --git a/runtime/ejs-regexp.c b/runtime/ejs-regexp.c index 660e437f..e94278c8 100644 --- a/runtime/ejs-regexp.c +++ b/runtime/ejs-regexp.c @@ -15,7 +15,7 @@ #include "ejs-proxy.h" #include "ejs-number.h" -#include "pcre.h" +#include "external-deps/pcre/pcre.h" ejsval _ejs_RegExp_prototype_exec_closure; diff --git a/runtime/gen-atoms.js b/runtime/gen-atoms.js index 11a08a4c..d66fadb7 100755 --- a/runtime/gen-atoms.js +++ b/runtime/gen-atoms.js @@ -1,4 +1,5 @@ #!/usr/bin/env node + const fs = require("fs"); let atom_def = fs.readFileSync(process.argv[2], "utf-8"); @@ -47,9 +48,7 @@ for (const atom_line of atom_lines) { new_lines.push(line); new_lines.push( - `static EJSPrimString _ejs_primstring_${atom_name} EJSVAL_ALIGNMENT = { .gc_header = (EJS_STRING_FLAT< Date: Tue, 7 Jul 2026 00:15:40 -0700 Subject: [PATCH 007/146] fix three self-hosting miscompiles that broke the stage2 bootstrap - initTypes was called with triple.pointerSize() (64, truthy) as its is32bit flag, so every 64-bit target used the padded 32-bit EJSObject layout: all module export slot offsets were shifted 8 bytes relative to the C runtime and cross-module binding reads returned garbage - module slot refs now use a non-inbounds gep: imported modules are declared with the generic EJSModule type (exports[1]), so indexing slot > 0 inbounds is poison that llvm 16 optimizers exploit - closure conversion now receives the suffix-stripped module name, so compiling a file with exports as the main input no longer creates bindings keyed 'foo.js' when the module registry has 'foo' Co-Authored-By: Claude Fable 5 --- lib/compiler.js | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/lib/compiler.js b/lib/compiler.js index 8234203b..505d95b7 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -2360,7 +2360,11 @@ class LLVMIRVisitor extends TreeVisitor { let slotnum = this.allModules.get(moduleString).exports.get(exportId).slot_num; if (opencode && this.triple.pointerSize() === 64) { - return ir.createInBoundsGetElementPointer( + // must NOT be an inbounds gep: imported modules are declared + // with the generic EJSModule type whose exports array has + // length 1, so indexing slotnum > 0 through an inbounds gep is + // poison and newer llvm optimizers (16+) miscompile the load. + return ir.createGetElementPointer( types.EjsModule, module_global, [consts.int64(0), consts.int32(3), consts.int64(slotnum)], @@ -3462,7 +3466,7 @@ function insert_toplevel_func(tree, moduleInfo) { export function compile(tree, base_output_filename, source_filename, module_infos, options, triple) { let abi = triple.abi(); - types.initTypes(triple.pointerSize()); + types.initTypes(triple.pointerSize() === 32); let module_filename = source_filename; @@ -3481,7 +3485,10 @@ export function compile(tree, base_output_filename, source_filename, module_info //debug.log 1, 'before closure conversion' //debug.log 1, -> escodegenerate tree - tree = closure_convert(tree, source_filename, module_infos, options); + // use the suffix-stripped name: module bindings created during closure + // conversion must use the same key the module was registered under in + // module_infos (imports are always suffix-free; the main file isn't) + tree = closure_convert(tree, module_filename, module_infos, options); debug.log(1, "after closure conversion"); // debug.log(1, () => escodegenerate(tree)); From d60dd53a028606896c183b34714dde887c86c48b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 00:25:37 -0700 Subject: [PATCH 008/146] modernize the llvm dependency: 16.0.6 -> 22.1.8 api updates in the ejs-llvm and node-llvm bindings: - Intrinsic::getDeclaration -> getOrInsertDeclaration (renamed in 20) - IRBuilder::CreateGlobalStringPtr -> CreateGlobalString (removed in 20) - Type::getPointerTo -> PointerType::getUnqual (removed in 21; everything is an opaque ptr now anyway) - Module::setTargetTriple takes llvm::Triple (changed in 21) - lifetime intrinsics are size-less in 22 - APInt construction passes isSigned/implicitTrunc so negative and oversized js numbers keep their old truncating behavior instead of tripping the (new in 20) assertion .buckconfig llvm prefix now points at homebrew's current llvm keg and the stale -16.0.6 LLVM_SUFFIX default in mk/config.mk is gone (tools come from PATH). verified: node-hosted stage0 compiles the compiler to a working ejs.exe.stage1 via buck2, which compiles and links running programs, all against llvm 22 (llvm-as/opt/llc 22 + libLLVM 22). Co-Authored-By: Claude Fable 5 --- .buckconfig | 2 +- ejs-llvm/constant.cpp | 4 +++- ejs-llvm/irbuilder.cpp | 4 +++- ejs-llvm/module.cpp | 8 +++++--- ejs-llvm/type.cpp | 4 +++- mk/config.mk | 3 ++- node-llvm/constant.cpp | 4 +++- node-llvm/irbuilder.cpp | 12 +++++++++--- node-llvm/module.cpp | 8 +++++--- node-llvm/type.cpp | 3 ++- 10 files changed, 36 insertions(+), 16 deletions(-) diff --git a/.buckconfig b/.buckconfig index dce3cc4a..53b35069 100644 --- a/.buckconfig +++ b/.buckconfig @@ -19,5 +19,5 @@ target_platform_detector_spec = target:root//...->prelude//platforms:default ignore = .git [llvm] -prefix = /opt/homebrew/opt/llvm@16 +prefix = /opt/homebrew/opt/llvm suffix = diff --git a/ejs-llvm/constant.cpp b/ejs-llvm/constant.cpp index 8c145850..69979d1a 100644 --- a/ejs-llvm/constant.cpp +++ b/ejs-llvm/constant.cpp @@ -73,7 +73,9 @@ namespace ejsllvm { REQ_INT_ARG (1, v); if (argc == 2) { - return Value_new (llvm::Constant::getIntegerValue(ty, llvm::APInt(ty->getPrimitiveSizeInBits(), v))); + // llvm 20+ asserts on implicit truncation; keep the old + // truncating behavior for negative/oversized js numbers + return Value_new (llvm::Constant::getIntegerValue(ty, llvm::APInt(ty->getPrimitiveSizeInBits(), v, /*isSigned*/ true, /*implicitTrunc*/ true))); } else if (argc == 3 && EJSVAL_IS_NUMBER(args[2]) && ty->getPrimitiveSizeInBits() == 64) { uint64_t vhi = v; diff --git a/ejs-llvm/irbuilder.cpp b/ejs-llvm/irbuilder.cpp index 07fb36b6..6a892477 100644 --- a/ejs-llvm/irbuilder.cpp +++ b/ejs-llvm/irbuilder.cpp @@ -274,7 +274,9 @@ namespace ejsllvm { REQ_UTF8_ARG(0, val); FALLBACK_EMPTY_UTF8_ARG(1, name); - return Value_new (_llvm_builder.CreateGlobalStringPtr(val, name)); + // CreateGlobalStringPtr was removed in llvm 20; CreateGlobalString + // is identical under opaque pointers + return Value_new (_llvm_builder.CreateGlobalString(val, name)); } static EJS_NATIVE_FUNC(IRBuilder_createUnreachable) { diff --git a/ejs-llvm/module.cpp b/ejs-llvm/module.cpp index e0994ab2..3d4d6c01 100644 --- a/ejs-llvm/module.cpp +++ b/ejs-llvm/module.cpp @@ -88,9 +88,10 @@ namespace ejsllvm { } #if false - llvm::Function* f = llvm::Intrinsic::getDeclaration (module->llvm_module, intrinsic_id, param_types); + llvm::Function* f = llvm::Intrinsic::getOrInsertDeclaration (module->llvm_module, intrinsic_id, param_types); #else - llvm::Function* f = llvm::Intrinsic::getDeclaration (module->llvm_module, intrinsic_id); + // renamed from getDeclaration in llvm 20 + llvm::Function* f = llvm::Intrinsic::getOrInsertDeclaration (module->llvm_module, intrinsic_id); #endif return Function_new (f); @@ -234,7 +235,8 @@ namespace ejsllvm { REQ_UTF8_ARG(0, triple); - module->llvm_module->setTargetTriple (triple); + // setTargetTriple takes an llvm::Triple as of llvm 21 + module->llvm_module->setTargetTriple (llvm::Triple(triple)); return _ejs_undefined; } diff --git a/ejs-llvm/type.cpp b/ejs-llvm/type.cpp index 6fb1f783..acbffd63 100644 --- a/ejs-llvm/type.cpp +++ b/ejs-llvm/type.cpp @@ -55,7 +55,9 @@ namespace ejsllvm { #undef LLVM_TYPE_METHOD static EJS_NATIVE_FUNC(Type_prototype_pointerTo) { - return Type_new(((Type*)EJSVAL_TO_OBJECT(*_this))->type->getPointerTo()); + // Type::getPointerTo was removed in llvm 21; all pointers are opaque + llvm::Type* ty = ((Type*)EJSVAL_TO_OBJECT(*_this))->type; + return Type_new(llvm::PointerType::getUnqual(ty->getContext())); } static EJS_NATIVE_FUNC(Type_prototype_isVoid) { diff --git a/mk/config.mk b/mk/config.mk index d93c3150..5350042c 100644 --- a/mk/config.mk +++ b/mk/config.mk @@ -8,7 +8,8 @@ $(TOP)/build/host-config.mk: $(TOP)/build/config.guess -include $(TOP)/build/host-config.mk -LLVM_SUFFIX?=-16.0.6 +# empty suffix: use the llvm tools on PATH (homebrew llvm, currently 22.x) +LLVM_SUFFIX?= # we don't care about the version here HOST_OS:=$(patsubst darwin%,darwin,$(HOST_OS)) diff --git a/node-llvm/constant.cpp b/node-llvm/constant.cpp index ebb4df68..a98de195 100644 --- a/node-llvm/constant.cpp +++ b/node-llvm/constant.cpp @@ -68,7 +68,9 @@ namespace jsllvm { Local result; if (info.Length() == 2) { - result = Value::Create(llvm::Constant::getIntegerValue(ty, llvm::APInt(ty->getPrimitiveSizeInBits(), v))); + // llvm 20+ asserts on implicit truncation; keep the old truncating + // behavior for negative/oversized js numbers + result = Value::Create(llvm::Constant::getIntegerValue(ty, llvm::APInt(ty->getPrimitiveSizeInBits(), v, /*isSigned*/ true, /*implicitTrunc*/ true))); } else if (info.Length() == 3 && info[2]->IsNumber() && ty->getPrimitiveSizeInBits() == 64) { // allow a 3 arg form for 64 bit ints: diff --git a/node-llvm/irbuilder.cpp b/node-llvm/irbuilder.cpp index dbdfaa58..d673a573 100644 --- a/node-llvm/irbuilder.cpp +++ b/node-llvm/irbuilder.cpp @@ -552,7 +552,9 @@ namespace jsllvm { FALLBACK_EMPTY_UTF8_ARG(context, 0, val); FALLBACK_EMPTY_UTF8_ARG(context, 1, name); - Local result = Constant::Create(IRBuilder::builder.CreateGlobalStringPtr(*val, *name)); + // CreateGlobalStringPtr was removed in llvm 20; CreateGlobalString is + // identical under opaque pointers + Local result = Constant::Create(IRBuilder::builder.CreateGlobalString(*val, *name)); info.GetReturnValue().Set(result); } @@ -631,7 +633,9 @@ namespace jsllvm { REQ_LLVM_VAL_ARG(context, 0, val); REQ_LLVM_CONST_INT_ARG(context, 1, size); - Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateLifetimeStart(val, size))); + // llvm 22 lifetime intrinsics are size-less; the size arg is ignored + (void)size; + Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateLifetimeStart(val))); info.GetReturnValue().Set(result); } @@ -643,7 +647,9 @@ namespace jsllvm { REQ_LLVM_VAL_ARG(context, 0, val); REQ_LLVM_CONST_INT_ARG(context, 1, size); - Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateLifetimeEnd(val, size))); + // llvm 22 lifetime intrinsics are size-less; the size arg is ignored + (void)size; + Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateLifetimeEnd(val))); info.GetReturnValue().Set(result); } diff --git a/node-llvm/module.cpp b/node-llvm/module.cpp index e3b7d624..8ea1210b 100644 --- a/node-llvm/module.cpp +++ b/node-llvm/module.cpp @@ -84,9 +84,10 @@ namespace jsllvm { } #if false - llvm::Function* f = llvm::Intrinsic::getDeclaration (module->llvm_obj, intrinsic_id, param_types); + llvm::Function* f = llvm::Intrinsic::getOrInsertDeclaration (module->llvm_obj, intrinsic_id, param_types); #else - llvm::Function* f = llvm::Intrinsic::getDeclaration (module->llvm_obj, intrinsic_id); + // renamed from getDeclaration in llvm 20 + llvm::Function* f = llvm::Intrinsic::getOrInsertDeclaration (module->llvm_obj, intrinsic_id); #endif Local result = Function::Create(f); @@ -249,7 +250,8 @@ namespace jsllvm { REQ_UTF8_ARG(context, 0, triple); - module->llvm_obj->setTargetTriple (*triple); + // setTargetTriple takes an llvm::Triple as of llvm 21 + module->llvm_obj->setTargetTriple (llvm::Triple(*triple)); } Nan::Persistent Module::constructor; diff --git a/node-llvm/type.cpp b/node-llvm/type.cpp index be33b2e4..e182ae5b 100644 --- a/node-llvm/type.cpp +++ b/node-llvm/type.cpp @@ -66,7 +66,8 @@ namespace jsllvm { NAN_METHOD(Type::pointerTo) { auto type = Unwrap(info.This()); - info.GetReturnValue().Set(Type::Create(type->llvm_obj->getPointerTo())); + // Type::getPointerTo was removed in llvm 21; all pointers are opaque + info.GetReturnValue().Set(Type::Create(llvm::PointerType::getUnqual(type->llvm_obj->getContext()))); } NAN_METHOD(Type::isVoid) { From b8c7f32d12ab19c514d635095546ca4ce089d1ba Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 11:04:40 -0700 Subject: [PATCH 009/146] fix conservative GC holes that corrupted the self-hosted compiler - implement MARK_REGISTERS for arm64: spill x19-x28/fp and d8-d15 and scan them as roots. it was previously empty, so any ejsval held only in a callee-saved register during a collection was freed while live. - scan the stack (and generator stacks) for raw, untagged heap pointers too, not just tagged ejsvals: optimized code unboxes closure envs and objects once and keeps/spills the raw pointer. - accept interior pointers in find_page_and_cell (canonicalizing to the cell start before pushing on the worklist): optimized code keeps env slot addresses live with the env base dead. also fixes a page_index off-by-one that could read past page_infos. - zero cells at allocation and skip objects with NULL ops when scanning: any allocation between _ejs_gc_alloc and _ejs_init_object can collect, and recycled cells were full of 0xaf poison. - root _ejs_Iterator_prototype (the add_root call in _ejs_iterator_init_proto rooted _ejs_Generator_prototype instead -- which _ejs_generator_init roots anyway), and register roots for every builtin global ejsval in one place in _ejs_init: the data segment is not scanned, and relying on each *_init to root what it creates is how the iterator prototype ended up freed with everything created later still using it as [[Prototype]]. - skip not-yet-initialized static module objects in mark_from_modules. with these, programs compiled by ejs run to completion with a full collection forced on every allocation (EJS_GC_EVERY_N_ALLOC=1). Co-Authored-By: Claude Fable 5 --- runtime/ejs-gc.c | 106 +++++++++++++++++------ runtime/ejs-generator.c | 7 +- runtime/ejs-init.c | 183 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 269 insertions(+), 27 deletions(-) diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index b0976cb5..d070c982 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -497,15 +497,18 @@ find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) int page_index = PTR_TO_ARENA_PAGE_INDEX(ptr); - if (page_index < 0 || page_index > arena->num_pages) { + if (page_index < 0 || page_index >= arena->num_pages) { return NULL; } PageInfo *page = arena->page_infos[page_index]; - if (!IS_ALIGNED_TO(ptr, page->cell_size)) { - return NULL; // can't possibly point to allocated cells. - } + // note: interior pointers are accepted (PTR_TO_CELL divides by the + // cell size, so any pointer into a cell resolves to that cell). + // optimized code compiled by ejs keeps addresses of closure env + // slots live across calls with the env base pointer dead, so the + // conservative scan must treat interior pointers as referencing + // the containing object. if (cell_idx) { *cell_idx = PTR_TO_CELL(ptr, page); @@ -714,6 +717,11 @@ _scan_ejsvalue (ejsval val) static void _scan_from_ejsobject(EJSObject* obj) { + // freshly allocated objects are zeroed but not yet initialized (their + // constructor may trigger a collection before _ejs_init_object runs); + // there's nothing to scan in them yet. + if (obj->ops == NULL) + return; OP(obj,Scan)(obj, _scan_ejsvalue); } @@ -790,6 +798,10 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) if (IS_FREE(cell)) continue; // skip free cells if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells + // canonicalize interior pointers to the start of their cell; the + // worklist processing reads the object header from the pointer. + gcptr = page->page_start + (cell_idx * page->cell_size); + WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); } } @@ -805,28 +817,33 @@ mark_ejsvals_in_range(void* low, void* high) #endif for (; p < high - sizeof(ejsval); p += sizeof(ejsval)) { ejsval candidate_val = *((ejsval*)p); + GCObjectPtr gcptr; if (EJSVAL_IS_GCTHING_IMPL(candidate_val)) { - GCObjectPtr gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(candidate_val); + gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(candidate_val); + } + else { + // also treat the slot as a raw, untagged pointer: optimized + // (opt -O2) code compiled by ejs unboxes closure envs and + // objects once and keeps/spills the raw pointer, with the + // tagged ejsval potentially dead. + gcptr = *(GCObjectPtr*)p; + } - if (gcptr == NULL) continue; // skip nulls. + if (gcptr == NULL) continue; // skip nulls. - uint32_t cell_idx; - PageInfo *page = find_page_and_cell(gcptr, &cell_idx); - if (page) { - // XXX more checks before we start treating the pointer like a GCObjectPtr? - BitmapCell cell = page->page_bitmap[cell_idx]; - if (IS_FREE(cell)) continue; // skip free cells - if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells - - if (EJSVAL_IS_STRING(candidate_val)) { - SPEW(4, _ejs_log ("found ptr to %p(PrimString) on stack\n", EJSVAL_TO_STRING(candidate_val))); - WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); - } - else { - //SPEW(_ejs_log ("found ptr to %p(%s) on stack\n", EJSVAL_TO_OBJECT(candidate_val), CLASSNAME(EJSVAL_TO_OBJECT(candidate_val)))); - WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); - } - } + uint32_t cell_idx; + PageInfo *page = find_page_and_cell(gcptr, &cell_idx); + if (page) { + // XXX more checks before we start treating the pointer like a GCObjectPtr? + BitmapCell cell = page->page_bitmap[cell_idx]; + if (IS_FREE(cell)) continue; // skip free cells + if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells + + // canonicalize interior pointers to the start of their cell; the + // worklist processing reads the object header from the pointer. + gcptr = page->page_start + (cell_idx * page->cell_size); + + WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); } } } @@ -946,8 +963,16 @@ mark_from_modules() { SPEW(2, _ejs_log ("marking from module exotics")); - for (int i = 0; i < _ejs_num_modules; i ++) - _scan_from_ejsobject((EJSObject*)_ejs_modules[i]); + for (int i = 0; i < _ejs_num_modules; i ++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + // modules are static globals whose object headers aren't set up + // until _ejs_require_init; if a collection happens before that + // (e.g. EJS_GC_EVERY_N_ALLOC during _ejs_init) there's nothing to + // scan yet. + if (mod->ops == NULL) + continue; + _scan_from_ejsobject(mod); + } } #if TARGET_CPU_ARM @@ -962,7 +987,31 @@ mark_from_modules() mark_pointers_in_range(&__end, &__r0); \ EJS_MACRO_END #elif TARGET_CPU_ARM64 -#define MARK_REGISTERS +// spill the callee-saved registers (x19-x28, plus fp) and treat them as +// roots. code compiled by ejs (opt -O2) keeps live ejsvals in callee-saved +// registers across calls, and the mostly -O0 runtime doesn't reliably save +// all of them anywhere the stack scan would see. (an empty MARK_REGISTERS +// here let live objects be collected and their cells reused -> heap +// corruption.) +#define MARK_REGISTERS EJS_MACRO_START \ + GCObjectPtr __regs[21]; \ + __asm volatile ("stp x19, x20, [%0, #0]\n\t" \ + "stp x21, x22, [%0, #16]\n\t" \ + "stp x23, x24, [%0, #32]\n\t" \ + "stp x25, x26, [%0, #48]\n\t" \ + "stp x27, x28, [%0, #64]\n\t" \ + "str x29, [%0, #80]\n\t" \ + /* llvm will spill gprs into the callee-saved simd \ + registers under pressure, so scan those too */ \ + "stp d8, d9, [%0, #88]\n\t" \ + "stp d10, d11, [%0, #104]\n\t" \ + "stp d12, d13, [%0, #120]\n\t" \ + "stp d14, d15, [%0, #136]" \ + : : "r"(__regs) : "memory"); \ + __regs[19] = __regs[20] = NULL; \ + /* mark_pointers_in_range scans [low, high-1) */ \ + mark_pointers_in_range(__regs, __regs + 21); \ + EJS_MACRO_END #elif TARGET_CPU_AMD64 #define MARK_REGISTERS EJS_MACRO_START \ GCObjectPtr __rax, __rbx, __rcx, __rdx, __rsi, __rdi, __rbp, __rsp, __r8, __r9, __r10, __r11, __r12, __r13, __r14, __r15, __end; \ @@ -1392,6 +1441,11 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) } rv = alloc_from_page(info); + // zero the cell: recycled cells are filled with 0xaf on finalize, and a + // collection can scan this object before its constructor initializes it + // (any allocation between _ejs_gc_alloc and _ejs_init_object can + // trigger one). zeroed contents are inert to the scanner. + memset (rv, 0, info->cell_size); *((GCObjectHeader*)rv) = scan_type; if (info->num_free_cells == 0) { diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 771596dd..08fdf95a 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -221,7 +221,12 @@ ejsval _ejs_Iterator_prototype EJSVAL_ALIGNMENT; void _ejs_iterator_init_proto() { - _ejs_gc_add_root (&_ejs_Generator_prototype); + // used to (erroneously) root _ejs_Generator_prototype here, which + // _ejs_generator_init roots itself. nothing reachable references the + // iterator prototype until the other iterator protos are created, so + // without this root the first collection after this function freed it + // out from under everything that later used it as [[Prototype]]. + _ejs_gc_add_root (&_ejs_Iterator_prototype); _ejs_Iterator_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_Object_specops); ejsval _iterator = _ejs_function_new_native (_ejs_null, _ejs_Symbol_iterator, _ejs_Iterator_prototype_iterator); diff --git a/runtime/ejs-init.c b/runtime/ejs-init.c index 27c8edf3..02000d3d 100644 --- a/runtime/ejs-init.c +++ b/runtime/ejs-init.c @@ -146,6 +146,187 @@ _ejs_init_classes() #endif } +// root every global ejsval the runtime stores builtins into. these +// statics live in the data segment, which the collector does not scan; +// relying on each *_init function to root (or connect to the object +// graph) whatever it creates proved fragile -- a missed root means the +// first collection frees an object that is still referenced (see +// _ejs_iterator_init_proto). registering a root for a still-zeroed +// ejsval is harmless. +static void +_ejs_root_builtin_globals(void) +{ + extern ejsval _ejs_Array; + extern ejsval _ejs_ArrayBuffer; + extern ejsval _ejs_ArrayIterator; + extern ejsval _ejs_Boolean; + extern ejsval _ejs_DataView; + extern ejsval _ejs_Date; + extern ejsval _ejs_Error; + extern ejsval _ejs_Error_prototype; + extern ejsval _ejs_EvalError; + extern ejsval _ejs_EvalError_prototype; + extern ejsval _ejs_Float32Array; + extern ejsval _ejs_Float32Array_prototype; + extern ejsval _ejs_Float64Array; + extern ejsval _ejs_Float64Array_prototype; + extern ejsval _ejs_Function; + extern ejsval _ejs_Int16Array; + extern ejsval _ejs_Int16Array_prototype; + extern ejsval _ejs_Int32Array; + extern ejsval _ejs_Int32Array_prototype; + extern ejsval _ejs_Int8Array; + extern ejsval _ejs_Int8Array_prototype; + extern ejsval _ejs_JSON; + extern ejsval _ejs_Map; + extern ejsval _ejs_MapIterator; + extern ejsval _ejs_Math; + extern ejsval _ejs_Number; + extern ejsval _ejs_Object; + extern ejsval _ejs_Process; + extern ejsval _ejs_Promise; + extern ejsval _ejs_Proxy; + extern ejsval _ejs_RangeError; + extern ejsval _ejs_RangeError_prototype; + extern ejsval _ejs_ReferenceError; + extern ejsval _ejs_ReferenceError_prototype; + extern ejsval _ejs_Reflect; + extern ejsval _ejs_RegExp; + extern ejsval _ejs_SetIterator; + extern ejsval _ejs_String; + extern ejsval _ejs_StringIterator; + extern ejsval _ejs_Symbol; + extern ejsval _ejs_Symbol_create; + extern ejsval _ejs_Symbol_hasInstance; + extern ejsval _ejs_Symbol_isConcatSpreadable; + extern ejsval _ejs_Symbol_iterator; + extern ejsval _ejs_Symbol_match; + extern ejsval _ejs_Symbol_replace; + extern ejsval _ejs_Symbol_search; + extern ejsval _ejs_Symbol_species; + extern ejsval _ejs_Symbol_split; + extern ejsval _ejs_Symbol_toPrimitive; + extern ejsval _ejs_Symbol_toStringTag; + extern ejsval _ejs_Symbol_unscopables; + extern ejsval _ejs_SyntaxError; + extern ejsval _ejs_SyntaxError_prototype; + extern ejsval _ejs_Timer; + extern ejsval _ejs_TypeError; + extern ejsval _ejs_TypeError_prototype; + extern ejsval _ejs_URIError; + extern ejsval _ejs_URIError_prototype; + extern ejsval _ejs_Uint16Array; + extern ejsval _ejs_Uint16Array_prototype; + extern ejsval _ejs_Uint32Array; + extern ejsval _ejs_Uint32Array_prototype; + extern ejsval _ejs_Uint8Array; + extern ejsval _ejs_Uint8Array_prototype; + extern ejsval _ejs_Uint8ClampedArray; + extern ejsval _ejs_Uint8ClampedArray_prototype; + extern ejsval _ejs_WeakMap; + extern ejsval _ejs_WeakSet; + extern ejsval _ejs__ejs; + extern ejsval _ejs_clearInterval; + extern ejsval _ejs_clearTimeout; + extern ejsval _ejs_console; + extern ejsval _ejs_decodeURI; + extern ejsval _ejs_decodeURIComponent; + extern ejsval _ejs_encodeURI; + extern ejsval _ejs_encodeURIComponent; + extern ejsval _ejs_isFinite; + extern ejsval _ejs_isNaN; + extern ejsval _ejs_parseFloat; + extern ejsval _ejs_parseInt; + extern ejsval _ejs_require; + extern ejsval _ejs_setInterval; + extern ejsval _ejs_setTimeout; + + _ejs_gc_add_root (&_ejs_Array); + _ejs_gc_add_root (&_ejs_ArrayBuffer); + _ejs_gc_add_root (&_ejs_ArrayIterator); + _ejs_gc_add_root (&_ejs_Boolean); + _ejs_gc_add_root (&_ejs_DataView); + _ejs_gc_add_root (&_ejs_Date); + _ejs_gc_add_root (&_ejs_Error); + _ejs_gc_add_root (&_ejs_Error_prototype); + _ejs_gc_add_root (&_ejs_EvalError); + _ejs_gc_add_root (&_ejs_EvalError_prototype); + _ejs_gc_add_root (&_ejs_Float32Array); + _ejs_gc_add_root (&_ejs_Float32Array_prototype); + _ejs_gc_add_root (&_ejs_Float64Array); + _ejs_gc_add_root (&_ejs_Float64Array_prototype); + _ejs_gc_add_root (&_ejs_Function); + _ejs_gc_add_root (&_ejs_Int16Array); + _ejs_gc_add_root (&_ejs_Int16Array_prototype); + _ejs_gc_add_root (&_ejs_Int32Array); + _ejs_gc_add_root (&_ejs_Int32Array_prototype); + _ejs_gc_add_root (&_ejs_Int8Array); + _ejs_gc_add_root (&_ejs_Int8Array_prototype); + _ejs_gc_add_root (&_ejs_JSON); + _ejs_gc_add_root (&_ejs_Map); + _ejs_gc_add_root (&_ejs_MapIterator); + _ejs_gc_add_root (&_ejs_Math); + _ejs_gc_add_root (&_ejs_Number); + _ejs_gc_add_root (&_ejs_Object); + _ejs_gc_add_root (&_ejs_Process); + _ejs_gc_add_root (&_ejs_Promise); + _ejs_gc_add_root (&_ejs_Proxy); + _ejs_gc_add_root (&_ejs_RangeError); + _ejs_gc_add_root (&_ejs_RangeError_prototype); + _ejs_gc_add_root (&_ejs_ReferenceError); + _ejs_gc_add_root (&_ejs_ReferenceError_prototype); + _ejs_gc_add_root (&_ejs_Reflect); + _ejs_gc_add_root (&_ejs_RegExp); + _ejs_gc_add_root (&_ejs_SetIterator); + _ejs_gc_add_root (&_ejs_String); + _ejs_gc_add_root (&_ejs_StringIterator); + _ejs_gc_add_root (&_ejs_Symbol); + _ejs_gc_add_root (&_ejs_Symbol_create); + _ejs_gc_add_root (&_ejs_Symbol_hasInstance); + _ejs_gc_add_root (&_ejs_Symbol_isConcatSpreadable); + _ejs_gc_add_root (&_ejs_Symbol_iterator); + _ejs_gc_add_root (&_ejs_Symbol_match); + _ejs_gc_add_root (&_ejs_Symbol_replace); + _ejs_gc_add_root (&_ejs_Symbol_search); + _ejs_gc_add_root (&_ejs_Symbol_species); + _ejs_gc_add_root (&_ejs_Symbol_split); + _ejs_gc_add_root (&_ejs_Symbol_toPrimitive); + _ejs_gc_add_root (&_ejs_Symbol_toStringTag); + _ejs_gc_add_root (&_ejs_Symbol_unscopables); + _ejs_gc_add_root (&_ejs_SyntaxError); + _ejs_gc_add_root (&_ejs_SyntaxError_prototype); + _ejs_gc_add_root (&_ejs_Timer); + _ejs_gc_add_root (&_ejs_TypeError); + _ejs_gc_add_root (&_ejs_TypeError_prototype); + _ejs_gc_add_root (&_ejs_URIError); + _ejs_gc_add_root (&_ejs_URIError_prototype); + _ejs_gc_add_root (&_ejs_Uint16Array); + _ejs_gc_add_root (&_ejs_Uint16Array_prototype); + _ejs_gc_add_root (&_ejs_Uint32Array); + _ejs_gc_add_root (&_ejs_Uint32Array_prototype); + _ejs_gc_add_root (&_ejs_Uint8Array); + _ejs_gc_add_root (&_ejs_Uint8Array_prototype); + _ejs_gc_add_root (&_ejs_Uint8ClampedArray); + _ejs_gc_add_root (&_ejs_Uint8ClampedArray_prototype); + _ejs_gc_add_root (&_ejs_WeakMap); + _ejs_gc_add_root (&_ejs_WeakSet); + _ejs_gc_add_root (&_ejs__ejs); + _ejs_gc_add_root (&_ejs_clearInterval); + _ejs_gc_add_root (&_ejs_clearTimeout); + _ejs_gc_add_root (&_ejs_console); + _ejs_gc_add_root (&_ejs_decodeURI); + _ejs_gc_add_root (&_ejs_decodeURIComponent); + _ejs_gc_add_root (&_ejs_encodeURI); + _ejs_gc_add_root (&_ejs_encodeURIComponent); + _ejs_gc_add_root (&_ejs_isFinite); + _ejs_gc_add_root (&_ejs_isNaN); + _ejs_gc_add_root (&_ejs_parseFloat); + _ejs_gc_add_root (&_ejs_parseInt); + _ejs_gc_add_root (&_ejs_require); + _ejs_gc_add_root (&_ejs_setInterval); + _ejs_gc_add_root (&_ejs_setTimeout); +} + void _ejs_init(int argc, char** argv) { @@ -158,6 +339,8 @@ _ejs_init(int argc, char** argv) _ejs_gc_init(); _ejs_exception_init(); + _ejs_root_builtin_globals(); + // initialization or ECMA262 builtins _ejs_gc_add_root (&_ejs_global); _ejs_global = _ejs_object_new (_ejs_null, &_ejs_Object_specops); From 9e474876781b7d1da83bac2ab1edd7841f21d93b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 11:04:40 -0700 Subject: [PATCH 010/146] set target triple and datalayout on emitted llvm modules without a datalayout, opt folds struct GEPs using llvm's defaults, where i64 is only 4-byte aligned. that computes EJSModule.exports at offset 44 while clang lays it out at 48 for the runtime, so every module slot access was skewed 4 bytes relative to the C side -- the GC scanned the wrong words of each module global and freed objects that were only referenced from module slots. Co-Authored-By: Claude Fable 5 --- lib/compiler.js | 2 ++ lib/triple.js | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/lib/compiler.js b/lib/compiler.js index 505d95b7..a175336c 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -3505,6 +3505,8 @@ export function compile(tree, base_output_filename, source_filename, module_info // debug.log(1, () => escodegenerate(tree)); let module = new llvm.Module(base_output_filename); + module.setTriple(triple.llvmTriple()); + module.setDataLayout(triple.dataLayout()); module.toplevel_name = toplevel_name; diff --git a/lib/triple.js b/lib/triple.js index 39d34e6b..e8e650e3 100644 --- a/lib/triple.js +++ b/lib/triple.js @@ -48,6 +48,38 @@ export class Triple { } } + // the llvm target triple for emitted modules. without this (and the + // data layout below) set on the module, opt folds struct GEPs using + // llvm's default layout, where i64 is only 4-byte aligned -- which + // computes different field offsets than the C compiler does for the + // runtime (e.g. EJSModule.exports), corrupting every module slot + // access and blinding the GC to module-referenced objects. + llvmTriple() { + switch (this.os) { + case "macos": + return `${this.arch}-apple-macosx`; + case "ios": + return `${this.arch}-apple-ios`; + case "linux": + return `${this.arch === "arm64" ? "aarch64" : this.arch}-unknown-linux-gnu`; + default: + throw new Error(`unknown llvm triple for os: ${this.os}`); + } + } + + // must match what clang uses for the runtime's target (see llvmTriple + // above for why). + dataLayout() { + if (this.os === "macos" || this.os === "ios") { + if (this.arch === "arm64" || this.arch === "aarch64") + return "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"; + return "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"; + } + if (this.arch === "x86_64") + return "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"; + return "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"; + } + llcArch() { switch (this.arch) { case "x86_64": From 0192338d5f1402f91fab8cb777400e13cace73e8 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 11:04:40 -0700 Subject: [PATCH 011/146] fix parseInt int32 overflow and uint32 conversion of negative doubles parseInt accumulated into a C int, so parseInt("ffffffff", 16) wrapped to -1. esprima parses hex literals with parseInt, which meant the self-hosted compiler read 0xffffffff literals in its own source as -1. Constant.getIntegerValue's 64-bit form then cast that -1.0 to uint32_t, which saturates to 0 on arm64 (vs wrapping on x86), so stage2 emitted nanboxing masks of 0x7fff00000000 instead of 0x7fffffffffff and stage3 binaries crashed on their first closure env access. the bindings now convert with wrapping (ToUint32) semantics as well. with this the bootstrap reaches a fixed point: stage2 and stage3 are byte-for-byte identical. Co-Authored-By: Claude Fable 5 --- ejs-llvm/constant.cpp | 6 +++++- node-llvm/constant.cpp | 4 +++- runtime/ejs-ops.c | 9 +++++++-- 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/ejs-llvm/constant.cpp b/ejs-llvm/constant.cpp index 69979d1a..a7377dcc 100644 --- a/ejs-llvm/constant.cpp +++ b/ejs-llvm/constant.cpp @@ -79,7 +79,11 @@ namespace ejsllvm { } else if (argc == 3 && EJSVAL_IS_NUMBER(args[2]) && ty->getPrimitiveSizeInBits() == 64) { uint64_t vhi = v; - uint32_t vlo = (uint32_t)EJSVAL_TO_NUMBER(args[2]); + // convert with ToUint32 (wrapping) semantics: a bare + // double->uint32_t cast of a negative value saturates to 0 on + // arm64, silently corrupting constants like 0xffffffff that + // reach us as -1 + uint32_t vlo = (uint32_t)(int64_t)EJSVAL_TO_NUMBER(args[2]); return Value_new (llvm::Constant::getIntegerValue(ty, llvm::APInt(ty->getPrimitiveSizeInBits(), (int64_t)((vhi << 32) | vlo)))); } else diff --git a/node-llvm/constant.cpp b/node-llvm/constant.cpp index a98de195..d5082575 100644 --- a/node-llvm/constant.cpp +++ b/node-llvm/constant.cpp @@ -76,7 +76,9 @@ namespace jsllvm { // allow a 3 arg form for 64 bit ints: // constant = llvm.Constant.getIntegerValue types.int64, ch, cl uint64_t vhi = v; - uint32_t vlo = (uint32_t)info[2]->NumberValue(context).ToChecked(); + // convert with ToUint32 (wrapping) semantics: a bare double->uint32_t + // cast of a negative value saturates to 0 on arm64 + uint32_t vlo = (uint32_t)(int64_t)info[2]->NumberValue(context).ToChecked(); result = Value::Create (llvm::Constant::getIntegerValue(ty, llvm::APInt(ty->getPrimitiveSizeInBits(), (int64_t)((vhi << 32) | vlo)))); } else { diff --git a/runtime/ejs-ops.c b/runtime/ejs-ops.c index bbd5ff0a..4baf937f 100644 --- a/runtime/ejs-ops.c +++ b/runtime/ejs-ops.c @@ -1329,7 +1329,12 @@ EJS_NATIVE_FUNC(_ejs_parseInt_impl) { /* implementation; and if R is not 2, 4, 8, 10, 16, or 32, then mathInt may be an implementation-dependent */ /* approximation to the mathematical integer value that is represented by Z in radix-R notation.) */ - int mathInt = 0; + // the accumulator must be a double: js numbers aren't int32, and e.g. + // parseInt("ffffffff", 16) must be 4294967295, not -1. (esprima uses + // parseInt for hex literals, so this int32 overflow made the compiled + // compiler read 0xffffffff literals as -1 and emit corrupt nanboxing + // masks.) + double mathInt = 0; int32_t Zlen = i; for (i = 0; i < Zlen; i ++) { jschar needle[2]; @@ -1349,7 +1354,7 @@ EJS_NATIVE_FUNC(_ejs_parseInt_impl) { } /* 14. Let number be the Number value for mathInt. */ - int32_t number = mathInt * sign; + double number = mathInt * sign; /* 15. Return sign * number */ return NUMBER_TO_EJSVAL(number); From a16a6a20b595a785ab18ae148210a108c718b7d7 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 12:00:12 -0700 Subject: [PATCH 012/146] fix destructuring in for-of heads DesugarDestructuring ran before DesugarForOf and rewrote the loop's binding pattern into multiple declarators (of which DesugarForOf only kept the first, with garbage init), so `for (let [k, v] of m)` failed with "undeclared identifier". the destructuring pass now leaves for-of lefts alone, and a second DesugarDestructuring pass runs after DesugarForOf to desugar the `let = %iter_next.value` declaration it emits. array, nested, and object patterns in for-of all work now. Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 5 +++++ lib/passes/desugar-destructuring.js | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index 663cf611..aac431e3 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -44,6 +44,11 @@ const passes = [ DesugarArrowFunctions, DesugarDefaults, DesugarForOf, + // DesugarForOf re-emits the loop's binding pattern as a fresh let + // declaration (`let [k,v] = %iter_next.value`), so destructuring has + // to run again after it. the first DesugarDestructuring pass still + // has to run before DesugarDefaults, which assumes simple params. + DesugarDestructuring, DesugarSpread, DesugarMetaProperties, enable_hoist_func_decls_pass ? HoistFuncDecls : null, diff --git a/lib/passes/desugar-destructuring.js b/lib/passes/desugar-destructuring.js index a05fca99..a94e1d8c 100644 --- a/lib/passes/desugar-destructuring.js +++ b/lib/passes/desugar-destructuring.js @@ -104,6 +104,17 @@ function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { } export class DesugarDestructuring extends TransformPass { + // don't touch a for-of's binding: DesugarForOf runs later and rewrites + // it into a normal let declaration inside the loop body, which the + // second DesugarDestructuring pass (after DesugarForOf) desugars. + // visiting it here would split the pattern into multiple declarators, + // of which DesugarForOf only keeps the first. + visitForOf(n) { + n.right = this.visit(n.right); + n.body = this.visit(n.body); + return n; + } + visitFunction(n) { // we visit the formal parameters directly, rewriting // them as tmp arg names and adding 'let' decls for the From 987e73276988b23cb2bb9f3027f9ed8ed20080d6 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 12:00:12 -0700 Subject: [PATCH 013/146] fix generator crash on arm64: don't pass a pointer through makecontext makecontext's variadic args are ints, so the EJSGenerator* was silently truncated to 32 bits and _ejs_generator_start crashed dereferencing it (heap pointers on arm64 macos don't fit). split the pointer across two int args posix-style and reassemble in a trampoline. also grow the generator stack from 64k to 512k; frames from compiled code are large. all 12 generator tests pass now; the full suite is 373 pass / 26 xfail / 0 fail against both stage1 and stage2. Co-Authored-By: Claude Fable 5 --- runtime/ejs-generator.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 08fdf95a..2b03764c 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -114,7 +114,7 @@ _ejs_iterator_wrapper_new (ejsval iterator) return OBJECT_TO_EJSVAL(rv); } -#define GENERATOR_STACK_SIZE 64 * 1024 +#define GENERATOR_STACK_SIZE 512 * 1024 static void _ejs_generator_start(EJSGenerator* gen) @@ -127,6 +127,17 @@ _ejs_generator_start(EJSGenerator* gen) gen->yielded_value = _ejs_create_iter_result(_ejs_undefined, _ejs_true); } +// makecontext's variadic arguments are ints, so a 64-bit pointer passed +// directly gets truncated (which is how generators crashed on arm64 +// macos: heap pointers there don't fit in 32 bits). split the pointer +// across two int args, posix-style. +static void +_ejs_generator_trampoline(unsigned int gen_lo, unsigned int gen_hi) +{ + EJSGenerator* gen = (EJSGenerator*)(((uint64_t)gen_hi << 32) | gen_lo); + _ejs_generator_start(gen); +} + ejsval _ejs_generator_new (ejsval generator_body) { @@ -143,7 +154,9 @@ _ejs_generator_new (ejsval generator_body) rv->generator_context.uc_stack.ss_sp = rv->stack; rv->generator_context.uc_stack.ss_size = GENERATOR_STACK_SIZE; rv->generator_context.uc_link = &rv->caller_context; - makecontext(&rv->generator_context, (void(*)(void))_ejs_generator_start, 1, rv); + makecontext(&rv->generator_context, (void(*)(void))_ejs_generator_trampoline, 2, + (unsigned int)(uint64_t)(uintptr_t)rv, + (unsigned int)(((uint64_t)(uintptr_t)rv) >> 32)); memset(&rv->caller_context, 0, sizeof(rv->caller_context)); return OBJECT_TO_EJSVAL(rv); From 1b1404d1773a35e0289bf7506fe66a0bb9391e3d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 12:30:14 -0700 Subject: [PATCH 014/146] add //:test-stage{1,2,3} targets that run the test suite via buck2 buck2 build //:test-stage3 builds the whole bootstrap chain, assembles a repo-shaped tree (srcdir-tree + test/ + the stage exe + the stage0 compiler), and runs test/tester.js against it. the build fails if any test fails; the output artifact is the full test log. tester.js also learned about ejs.exe.stage3 (-s 3). Co-Authored-By: Claude Fable 5 --- BUCK | 15 +++++++++++++ buck-test-stage.sh | 53 ++++++++++++++++++++++++++++++++++++++++++++++ test/BUCK | 14 ++++++++++++ test/tester.js | 2 +- 4 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 buck-test-stage.sh create mode 100644 test/BUCK diff --git a/BUCK b/BUCK index fe4a179e..26173ac8 100644 --- a/BUCK +++ b/BUCK @@ -86,3 +86,18 @@ alias( name = "ejs.exe", actual = ":ejs.exe.stage1", ) + +# run the test suite against a stage: buck2 build //:test-stage3 +# the output artifact is the full test log; the build fails if any test +# fails. +[ + genrule( + name = "test-stage" + stage, + srcs = ["buck-test-stage.sh"], + out = "test-stage" + stage + ".log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location :ejs.exe.stage' + stage + ')" ' + + stage + ' "$(location //test:files)" ' + llvm_bindir(), + ) + for stage in ["1", "2", "3"] +] diff --git a/buck-test-stage.sh b/buck-test-stage.sh new file mode 100644 index 00000000..7b1ef76b --- /dev/null +++ b/buck-test-stage.sh @@ -0,0 +1,53 @@ +#!/bin/bash +# Invoked by //:test-stage{1,2,3}. Assembles a repo-shaped tree (the +# --srcdir tree + test/ + the stage executable) and runs test/tester.js +# against it. The genrule fails if any test fails; the test log is the +# output artifact. +set -euo pipefail + +TREE="$1" # //:srcdir-tree +GENERATED="$2" # //lib:generated (tester requires ../lib/generated/.../host-config.js) +STAGE_EXE="$3" # //:ejs.exe.stageN +STAGE_NUM="$4" # N +TEST_FILES="$5" # //test:files +LLVM_BIN="$6" # directory holding llc/opt + +# node_modules (glob/colors/temp for the tester) come from the repo, same +# as the babel step in //lib:generated. +REPO="${TMP%%/buck-out/*}" + +OUT_ABS="$(cd "$(dirname "$OUT")" && pwd)/$(basename "$OUT")" + +WORK="$TMP/testroot" +rm -rf "$WORK" +mkdir -p "$WORK" +cp -RL "$TREE"/. "$WORK/" +chmod -R u+w "$WORK" +mkdir -p "$WORK/lib/generated" +cp -RL "$GENERATED"/. "$WORK/lib/generated/" +cp "$STAGE_EXE" "$WORK/ejs.exe.stage$STAGE_NUM" +chmod +x "$WORK/ejs.exe.stage$STAGE_NUM" +mkdir -p "$WORK/test" +cp -RL "$TEST_FILES"/. "$WORK/test/" +chmod -R u+w "$WORK/test" + +# the tester regenerates an expected-out (using node) when the test file +# is newer than it; the copies above have fresh mtimes, so re-stamp the +# expected outputs afterwards to keep them newer. +find "$WORK/test" -name '*.js' -exec touch {} + +find "$WORK/test/expected" -type f -exec touch {} + + +export PATH="$LLVM_BIN:$PATH" +export NODE_PATH="$REPO/node_modules" +if [ "$(uname -s)" = "Darwin" ]; then + export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" +fi + +cd "$WORK/test" +if node tester.js -s "$STAGE_NUM" > "$OUT_ABS" 2>&1; then + tail -5 "$OUT_ABS" +else + echo "stage$STAGE_NUM tests FAILED:" >&2 + tail -40 "$OUT_ABS" >&2 + exit 1 +fi diff --git a/test/BUCK b/test/BUCK new file mode 100644 index 00000000..a9afbecc --- /dev/null +++ b/test/BUCK @@ -0,0 +1,14 @@ +# the test suite sources, staged into the tree //:test-stage{1,2,3} builds +filegroup( + name = "files", + srcs = glob( + ["**/*"], + exclude = [ + "**/*.exe", + "**/*.o", + "**/.deps/**", + "BUCK", + ], + ), + visibility = ["PUBLIC"], +) diff --git a/test/tester.js b/test/tester.js index 3bd26764..10909bea 100644 --- a/test/tester.js +++ b/test/tester.js @@ -22,7 +22,7 @@ const stdouts = Object.create(null); const failed_tests = []; // index here is the stage #. 0 = run it under node, 1 = run it with stage1, 2 = run it with stage2 -const compilers = ["../ejs", "../ejs.exe.stage1", "../ejs.exe.stage2"]; +const compilers = ["../ejs", "../ejs.exe.stage1", "../ejs.exe.stage2", "../ejs.exe.stage3"]; let runloop_impl = require("../lib/generated/lib/host-config.js").RUNLOOP_IMPL; From bf39a1c42b259563cedd012cf449a07dc7143113 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 12:30:14 -0700 Subject: [PATCH 015/146] remove the gnumake build system; buck2 covers everything now Makefile, mk/*, and the per-directory Makefiles (runtime, lib, ejs-llvm, node-compat, node-llvm, external-deps, test, samples, release, packaging) are replaced by the BUCK files: bootstrap stages, external deps, the babel'd stage0 compiler, and the test suite all build with buck2 (see the updated README). the one out-of-band step, building the node-llvm addon with node-gyp, moves from node-llvm/Makefile to node-llvm/build-addon.sh. standalone Makefiles that never used mk/ (test/v8, test/osx-test, test/ios-test-es6, test/mozilla-tests, test/require-test) are left alone. Co-Authored-By: Claude Fable 5 --- Makefile | 107 --- README.md | 33 +- ejs-llvm/Makefile | 81 -- external-deps/Makefile | 161 ---- lib/Makefile | 119 --- mk/.gitignore | 2 - mk/build.mk | 2 - mk/config.guess | 1807 -------------------------------------- mk/config.mk | 100 --- mk/iOS.cmake | 215 ----- mk/rules.mk | 45 - mk/utils.mk | 21 - node-compat/Makefile | 129 --- node-llvm/BUCK | 2 +- node-llvm/Makefile | 33 - node-llvm/build-addon.sh | 23 + packaging/Makefile | 93 -- release/Makefile | 37 - runtime/Makefile | 212 ----- samples/Makefile | 20 - samples/fetch/Makefile | 12 - test/Makefile | 97 -- 22 files changed, 40 insertions(+), 3311 deletions(-) delete mode 100644 Makefile delete mode 100644 ejs-llvm/Makefile delete mode 100644 external-deps/Makefile delete mode 100644 lib/Makefile delete mode 100644 mk/.gitignore delete mode 100644 mk/build.mk delete mode 100755 mk/config.guess delete mode 100644 mk/config.mk delete mode 100644 mk/iOS.cmake delete mode 100644 mk/rules.mk delete mode 100644 mk/utils.mk delete mode 100644 node-compat/Makefile delete mode 100644 node-llvm/Makefile create mode 100755 node-llvm/build-addon.sh delete mode 100644 packaging/Makefile delete mode 100644 release/Makefile delete mode 100644 runtime/Makefile delete mode 100644 samples/Makefile delete mode 100644 samples/fetch/Makefile delete mode 100644 test/Makefile diff --git a/Makefile b/Makefile deleted file mode 100644 index 7c09a528..00000000 --- a/Makefile +++ /dev/null @@ -1,107 +0,0 @@ -TOP=$(shell pwd) - -include $(TOP)/mk/config.mk - -SUBDIRS=external-deps node-compat node-llvm ejs-llvm lib runtime - -STAGE1_EXE = ejs.exe.stage1 -STAGE2_EXE = ejs.exe.stage2 -STAGE3_EXE = ejs.exe.stage3 - -# run git submodule magic if somebody is antsy and doesn't type the magic incantation before typing make -all-local:: ensure-submodules - -NODE_PATH?=$(shell $(MAKE) --no-print-directory -C test node-path) - -all-hook:: stage1 - -install-local:: - @$(MKDIR) $(bindir) - $(INSTALL) -c ejs.exe $(bindir)/ejs - -clean-local:: - @rm -f $(STAGE1_EXE) $(STAGE2_EXE) $(STAGE3_EXE) ejs.exe - -TARNAME=$(PRODUCT_name)-$(PRODUCT_VERSION) -TARFILE=$(TARNAME).tar.gz -DISTROOT=$(TOP) -TAR_EXCLUDES= \ - --exclude .circleci \ - --exclude .git \ - --exclude .gitmodules \ - --exclude .gitignore \ - --exclude .deps \ - --exclude host-config.mk \ - --exclude host-config.js \ - --exclude host-config-es6.js \ - --exclude $(TARFILE) \ - --exclude $(TARNAME) -dist-hook:: ensure-submodules - @echo creating $(DISTROOT)/$(TARNAME).tar.gz - @rm -rf $(DISTROOT)/$(TARNAME) - @$(MKDIR) $(DISTROOT)/$(TARNAME) - @COPYFILE_DISABLE=1 tar -c $(TAR_EXCLUDES) * | tar -C $(DISTROOT)/$(TARNAME) -xp - @(cd $(DISTROOT); \ - COPYFILE_DISABLE=1 tar -czf $(TARFILE) $(TARNAME)) - @rm -rf $(DISTROOT)/$(TARNAME) - @ls -l $(DISTROOT)/$(TARFILE) - -check: - @$(MAKE) -C test $@ - -check-%: - @$(MAKE) -C test $@ - -bootstrap: stage3 - -MODULE_DIRS = --moduledir $(TOP)/node-compat --moduledir $(TOP)/ejs-llvm - -lib/generated: - @$(MAKE) -C lib - -stage0: - @echo DONE - -stage1: $(STAGE1_EXE) - @cp $(STAGE1_EXE) ejs.exe - @ls -l ejs.exe - @echo DONE - -stage2: $(STAGE2_EXE) - @cp $(STAGE2_EXE) ejs.exe - @ls -l ejs.exe - @echo DONE - -stage3: $(STAGE3_EXE) - @cp $(STAGE3_EXE) ejs.exe - @ls -l ejs.exe - @echo DONE - -$(STAGE1_EXE): lib/generated - @echo Building stage 1 - @NODE_PATH="$(NODE_PATH)" ./ejs --srcdir --leave-temp $(MODULE_DIRS) ejs-es6.js - @mv ejs-es6.js.exe $@ - -$(STAGE2_EXE): $(STAGE1_EXE) lib/*.js lib/*.js.in - @echo Building stage 2 - @./$(STAGE1_EXE) --srcdir --leave-temp $(MODULE_DIRS) ejs-es6.js - @mv ejs-es6.js.exe $@ - -$(STAGE3_EXE): $(STAGE2_EXE) lib/*.js lib/*.js.in - @echo Building stage 3 - @./$(STAGE2_EXE) --srcdir --leave-temp $(MODULE_DIRS) ejs-es6.js - @mv ejs-es6.js.exe $@ - -echo-command-line: - @echo ./ejs.exe --leave-temp $(MODULE_DIRS) ejs-es6.js - -osx-tarball: - $(MAKE) -C release osx-tarball - -ensure-submodules: - @if [ ! -f pcre/configure.ac ]; then \ - git submodule init; \ - git submodule update; \ - fi - -include $(TOP)/mk/build.mk diff --git a/README.md b/README.md index ed20e3c6..aa85a112 100644 --- a/README.md +++ b/README.md @@ -10,38 +10,37 @@ Things only build reliably on OSX. I have easy access to other platforms, I jus On OSX -You'll need a couple of external dependencies to get things running: +The build uses [buck2](https://buck2.build). You'll need: 1. node.js -2. llvm 3.6 -3. coffeescript +2. llvm (homebrew's current keg; the path lives in `.buckconfig` under `[llvm] prefix`) +3. buck2 -The following commands should get you from 0 (well, Homebrew and Xcode) to echo-js built: +The following commands should get you from 0 (well, Homebrew and Xcode) to echo-js built and tested: ```sh -$ brew install node -$ brew install llvm -$ export PATH=/usr/local/opt/llvm/bin:$PATH +$ brew install node llvm $ npm install -$ npm install -g node-gyp babel@5.8.8 -$ export MIN_OSX_VERSION=10.8 # only if you're running 10.8, see below -$ export IOS_SDK_VERSION=9.3 # or whatever is installed -$ export LLVM_SUFFIX= # if installed llvm via homebrew, see below $ git submodule init $ git submodule update -$ make +$ ./node-llvm/build-addon.sh # builds the node addon the stage0 compiler uses +$ buck2 build //:ejs.exe # stage1 compiler (node-hosted stage0 compiles ejs-es6.js) +$ buck2 build //:ejs.exe.stage3 # full bootstrap: stage1 -> stage2 -> stage3 +$ buck2 build //:test-stage3 # run the test suite against stage3 ``` -The environment variable `LLVM_SUFFIX` can be set and its value will be appended to the names of all llvm executables (e.g. `llvm-config-3.6` instead of `llvm-config`.) The default is `-3.6`. Change this if you have a different build of -llvm you want to use. Homebrew installs llvm 3.6 executables without the suffix, thus `export LLVM_SUFFIX=`. +Useful targets: -As for `MIN_OSX_VERSION`: homebrew's formula for llvm (3.4, at least. haven't verified with 3.6) doesn't specify a `-mmacosx-version-min=` flag, so it builds to whatever you have on your machine. Node.js's gyp support in node-gyp, however, *does* put a `-mmacosx-version-min=10.5` flag. A mismatch here causes the node-llvm binding to allocate llvm types using incorrect size calculations, and causes all manner of memory corruption. If you're either running 10.5 or 10.9, you can leave the variable unset. Otherwise, set it to the version of OSX you're running. Hopefully some discussion with the homebrew folks will get this fixed upstream. - -both of these variable assignments can be placed in `echo-js/build/config-local.mk`. +- `//:ejs.exe.stage{1,2,3}` — the bootstrap stages (`//:ejs.exe` is an alias for stage1) +- `//:test-stage{1,2,3}` — build a stage and run `test/tester.js` against it; the build fails if any test fails, and the output artifact is the test log +- `//:srcdir-tree` — the assembled `--srcdir` layout the compiler runs against +If your llvm lives somewhere other than `/opt/homebrew/opt/llvm`, change `[llvm] prefix` in `.buckconfig`. On Linux +The BUCK files carry `config//os:linux` selects for the runtime and deps, but the linux build hasn't been exercised recently. Patches welcome! + But... Why? diff --git a/ejs-llvm/Makefile b/ejs-llvm/Makefile deleted file mode 100644 index 86858920..00000000 --- a/ejs-llvm/Makefile +++ /dev/null @@ -1,81 +0,0 @@ -TOP=.. - -include $(TOP)/mk/config.mk - -SOURCES= \ - allocainst.cpp \ - arraytype.cpp \ - basicblock.cpp \ - callinvoke.cpp \ - constant.cpp \ - constantarray.cpp \ - constantfp.cpp \ - dibuilder.cpp \ - ejs-llvm.cpp \ - function.cpp \ - functiontype.cpp \ - globalvariable.cpp \ - irbuilder.cpp \ - landingpad.cpp \ - loadinst.cpp \ - module.cpp \ - structtype.cpp \ - switch.cpp \ - type.cpp \ - value.cpp - - -CXX=clang++ - -LLVM_CONFIG=llvm-config$(LLVM_SUFFIX) - -LLVM_CXXFLAGS := $(shell $(LLVM_CONFIG) --cxxflags) -LLVM_INCLUDEDIR := $(shell $(LLVM_CONFIG) --includedir) - -LLVM_CXXFLAGS := $(subst $(LLVM_CPPFLAGS),,$(LLVM_CXXFLAGS)) -LLVM_DEFINES := $(subst -I$(LLVM_INCLUDEDIR),,$(LLVM_CPPFLAGS)) - -LLVM_LINK_FLAGS := $(shell $(LLVM_CONFIG) --ldflags --libs) - -ifeq ($(HOST_OS),darwin) -LLVM_LINK_FLAGS := $(LLVM_LINK_FLAGS) -lcurses -endif - -CXXFLAGS=-I../runtime -I$(LLVM_INCLUDEDIR) $(LLVM_CXXFLAGS) $(OSX_CFLAGS) - -CFLAGS += -Wno-c99-extensions -Wno-gnu-statement-expression - -OBJECTS=$(SOURCES:%.cpp=%.o) - -MODULE=libejsllvm-module.a - -all-local:: ejs-llvm.ejs $(MODULE) - -$(MODULE): $(OBJECTS) - ar cru $@ $(OBJECTS) - -$(OBJECTS): %.o: %.cpp - @mkdir -p .deps - @$(CXX) -MM $(CXXFLAGS) $< > .deps/$@-deps - @echo [$(CXX)] $< && $(CXX) $(CXXFLAGS) -c $< -o $@ - -ejs-llvm.ejs: ejs-llvm.ejs.in - @echo [gen] $@ && sed -e "s%@EJS_VERSION@%$(PRODUCT_VERSION)%" -e "s%@LLVM_LINK_FLAGS@%$(LLVM_LINK_FLAGS)%" $< > $@ - -install-local:: - @$(MKDIR) $(libdir) - @$(MKDIR) $(archlibdir) - $(INSTALL) -c ejs-llvm.ejs $(libdir) - $(INSTALL) -c $(MODULE) $(archlibdir) - -clean-local:: - rm -f $(OBJECTS) $(MODULE) ejs-llvm-atoms-gen.c - -ejs-llvm-atoms-gen.c: ejs-llvm-atoms.h $(TOP)/runtime/gen-atoms.js - @echo [GEN] $@ && $(TOP)/runtime/gen-atoms.js $< > .tmp-$@ && mv .tmp-$@ $@ - -ejs-llvm.o: ejs-llvm-atoms-gen.c - --include $(patsubst %.o,.deps/%.o-deps,$(OBJECTS)) - -include $(TOP)/mk/build.mk diff --git a/external-deps/Makefile b/external-deps/Makefile deleted file mode 100644 index e192e493..00000000 --- a/external-deps/Makefile +++ /dev/null @@ -1,161 +0,0 @@ -TOP=.. -include $(TOP)/mk/config.mk - -LLVM_CXXFLAGS="`$LLVM_CONFIG --cxxflags` -fno-rtti" -LLVM_LDFLAGS=`$LLVM_CONFIG --ldflags` -LLVM_LIBS=`$LLVM_CONFIG --libs core bitwriter jit x86codegen` -LLVM_LIBS:="$LLVM_LDFLAGS $LLVM_LIBS -lstdc++" -LLVM_CONFIGURE_ARGS=--disable-jit --enable-static --enable-optimized --disable-assertions - -PCRE_CONFIGURE_ARGS=--enable-pcre16 --enable-utf --disable-cpp - -CFLAGS=-I$(TOP)/runtime - -all-local:: build-pcre build-double-conversion - -clean-local:: clean-pcre clean-double-conversion - -install-local:: install-pcre install-double-conversion - -ifeq ($(HOST_OS),linux) -_TARGETS=linux -else -ifneq ($(CIRCLE_BUILD_NUM),) -_TARGETS=macos -else -_TARGETS=iossim iosdev macos -endif -endif - -build-double-conversion: $(_TARGETS:%=build-double-conversion-%) - -clean-double-conversion: $(_TARGETS:%=clean-double-conversion-%) - -.stamp-configure-double-conversion-linux: double-conversion/CMakeLists.txt - @$(MKDIR) double-conversion-linux - (cd double-conversion-linux && cmake ../double-conversion) && touch $@ - -.stamp-build-double-conversion-linux: .stamp-configure-double-conversion-linux - $(MAKE) -C double-conversion-linux && touch $@ - -.stamp-configure-double-conversion-macos: double-conversion/CMakeLists.txt - @$(MKDIR) double-conversion-macos - (cd double-conversion-macos && cmake ../double-conversion) && touch $@ - -.stamp-configure-double-conversion-iossim: double-conversion/CMakeLists.txt - @$(MKDIR) double-conversion-iossim - (cd double-conversion-iossim && \ - cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../mk/iOS.cmake -DIOS_PLATFORM=SIMULATOR64 -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSSIM_SYSROOT)) && touch $@ - -.stamp-configure-double-conversion-iosdev: double-conversion/CMakeLists.txt - @$(MKDIR) double-conversion-iosdev - (cd double-conversion-iosdev && \ - cmake ../double-conversion -DCMAKE_TOOLCHAIN_FILE=../../mk/iOS.cmake -DIOS_PLATFORM=OS -DMIN_IOS_VERSION=$(MIN_IOS_VERSION) -DIOS_SYSROOT=$(IOSDEV_SYSROOT)) && touch $@ - -.stamp-build-double-conversion-macos: .stamp-configure-double-conversion-macos - $(MAKE) -C double-conversion-macos && touch $@ - -.stamp-build-double-conversion-iossim: .stamp-configure-double-conversion-iossim - $(MAKE) -C double-conversion-iossim && touch $@ - -.stamp-build-double-conversion-iosdev: .stamp-configure-double-conversion-iosdev - $(MAKE) -C double-conversion-iosdev && touch $@ - - -build-double-conversion-linux: .stamp-build-double-conversion-linux -build-double-conversion-macos: .stamp-build-double-conversion-macos -build-double-conversion-iossim: .stamp-build-double-conversion-iossim -build-double-conversion-iosdev: .stamp-build-double-conversion-iosdev - - -clean-double-conversion-iossim: - -@test -d double-conversion-iossim && $(MAKE) -C double-conversion-iossim clean - @rm -f .stamp-build-double-conversion-iossim - -clean-double-conversion-iosdev: - -@test -d double-conversion-iosdev && $(MAKE) -C double-conversion-iosdev clean - @rm -f .stamp-build-double-conversion-iosdev - -clean-double-conversion-macos: - -@test -d double-conversion-macos && $(MAKE) -C double-conversion-macos clean - @rm -f .stamp-build-double-conversion-macos - -clean-double-conversion-linux: - -@test -d double-conversion-linux && $(MAKE) -C double-conversion-linux clean - @rm -f .stamp-build-double-conversion-linux - -build-pcre: $(_TARGETS:%=build-pcre-%) - -clean-pcre: $(_TARGETS:%=clean-pcre-%) - -.stamp-configure-pcre-linux: pcre/configure - @$(MKDIR) pcre-linux - (cd pcre-linux && \ - ../pcre/configure $(PCRE_CONFIGURE_ARGS)) && touch $@ - -.stamp-configure-pcre-macos: pcre/configure - @$(MKDIR) pcre-macos - (cd pcre-macos && \ - ../pcre/configure $(PCRE_CONFIGURE_ARGS)) && touch $@ - -.stamp-configure-pcre-iossim: pcre/configure - @$(MKDIR) pcre-iossim - (cd pcre-iossim && \ - 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Hard to guess exactly what SunOS6 will be like, but - # it's likely to be more like Solaris than SunOS4. - SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'` - GUESS=sparc-sun-solaris3$SUN_REL - ;; - sun4*:SunOS:*:*) - case `/usr/bin/arch -k` in - Series*|S4*) - UNAME_RELEASE=`uname -v` - ;; - esac - # Japanese Language versions have a version number like '4.1.3-JL'. - SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'` - GUESS=sparc-sun-sunos$SUN_REL - ;; - sun3*:SunOS:*:*) - GUESS=m68k-sun-sunos$UNAME_RELEASE - ;; - sun*:*:4.2BSD:*) - UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null` - test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3 - case `/bin/arch` in - sun3) - GUESS=m68k-sun-sunos$UNAME_RELEASE - ;; - sun4) - GUESS=sparc-sun-sunos$UNAME_RELEASE - ;; - esac - ;; - aushp:SunOS:*:*) - GUESS=sparc-auspex-sunos$UNAME_RELEASE - ;; - # The situation for MiNT is a little confusing. The machine name - # can be virtually everything (everything which is not - # "atarist" or "atariste" at least should have a processor - # > m68000). The system name ranges from "MiNT" over "FreeMiNT" - # to the lowercase version "mint" (or "freemint"). Finally - # the system name "TOS" denotes a system which is actually not - # MiNT. But MiNT is downward compatible to TOS, so this should - # be no problem. - atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*) - GUESS=m68k-atari-mint$UNAME_RELEASE - ;; - atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*) - GUESS=m68k-atari-mint$UNAME_RELEASE - ;; - *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*) - GUESS=m68k-atari-mint$UNAME_RELEASE - ;; - milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*) - GUESS=m68k-milan-mint$UNAME_RELEASE - ;; - hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*) - GUESS=m68k-hades-mint$UNAME_RELEASE - ;; - *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*) - GUESS=m68k-unknown-mint$UNAME_RELEASE - ;; - m68k:machten:*:*) - GUESS=m68k-apple-machten$UNAME_RELEASE - ;; - powerpc:machten:*:*) - GUESS=powerpc-apple-machten$UNAME_RELEASE - ;; - RISC*:Mach:*:*) - GUESS=mips-dec-mach_bsd4.3 - ;; - RISC*:ULTRIX:*:*) - GUESS=mips-dec-ultrix$UNAME_RELEASE - ;; - VAX*:ULTRIX*:*:*) - GUESS=vax-dec-ultrix$UNAME_RELEASE - ;; 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then - GUESS=rs6000-ibm-aix3.2.4 - else - GUESS=rs6000-ibm-aix3.2 - fi - ;; - *:AIX:*:[4567]) - IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` - if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then - IBM_ARCH=rs6000 - else - IBM_ARCH=powerpc - fi - if test -x /usr/bin/lslpp ; then - IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | \ - awk -F: '{ print $3 }' | sed s/[0-9]*$/0/` - else - IBM_REV=$UNAME_VERSION.$UNAME_RELEASE - fi - GUESS=$IBM_ARCH-ibm-aix$IBM_REV - ;; - *:AIX:*:*) - GUESS=rs6000-ibm-aix - ;; - ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*) - GUESS=romp-ibm-bsd4.4 - ;; - ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and - GUESS=romp-ibm-bsd$UNAME_RELEASE # 4.3 with uname added to - ;; # report: romp-ibm BSD 4.3 - *:BOSX:*:*) - GUESS=rs6000-bull-bosx - ;; - DPX/2?00:B.O.S.:*:*) - GUESS=m68k-bull-sysv3 - ;; - 9000/[34]??:4.3bsd:1.*:*) - GUESS=m68k-hp-bsd - ;; - hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) - GUESS=m68k-hp-bsd4.4 - ;; - 9000/[34678]??:HP-UX:*:*) - HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'` - case $UNAME_MACHINE in - 9000/31?) HP_ARCH=m68000 ;; - 9000/[34]??) HP_ARCH=m68k ;; - 9000/[678][0-9][0-9]) - if test -x /usr/bin/getconf; then - sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` - sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` - case $sc_cpu_version in - 523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0 - 528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1 - 532) # CPU_PA_RISC2_0 - case $sc_kernel_bits in - 32) HP_ARCH=hppa2.0n ;; - 64) HP_ARCH=hppa2.0w ;; - '') HP_ARCH=hppa2.0 ;; # HP-UX 10.20 - esac ;; - esac - fi - if test "$HP_ARCH" = ""; then - set_cc_for_build - sed 's/^ //' << EOF > "$dummy.c" - - #define _HPUX_SOURCE - #include - #include - - int main () - { - #if defined(_SC_KERNEL_BITS) - long bits = sysconf(_SC_KERNEL_BITS); - #endif - long cpu = sysconf (_SC_CPU_VERSION); - - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1"); break; - case CPU_PA_RISC2_0: - #if defined(_SC_KERNEL_BITS) - switch (bits) - { - case 64: puts ("hppa2.0w"); break; - case 32: puts ("hppa2.0n"); break; - default: puts ("hppa2.0"); break; - } break; - #else /* !defined(_SC_KERNEL_BITS) */ - puts ("hppa2.0"); break; - #endif - default: puts ("hppa1.0"); break; - } - exit (0); - } -EOF - (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"` - test -z "$HP_ARCH" && HP_ARCH=hppa - fi ;; - esac - if test "$HP_ARCH" = hppa2.0w - then - set_cc_for_build - - # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating - # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler - # generating 64-bit code. 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CPU_IS_PA_RISC returns correct - results, however. */ - if (CPU_IS_PA_RISC (cpu)) - { - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; - case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; - default: puts ("hppa-hitachi-hiuxwe2"); break; - } - } - else if (CPU_IS_HP_MC68K (cpu)) - puts ("m68k-hitachi-hiuxwe2"); - else puts ("unknown-hitachi-hiuxwe2"); - exit (0); - } -EOF - $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` && - { echo "$SYSTEM_NAME"; exit; } - GUESS=unknown-hitachi-hiuxwe2 - ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*) - GUESS=hppa1.1-hp-bsd - ;; - 9000/8??:4.3bsd:*:*) - GUESS=hppa1.0-hp-bsd - ;; - *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) - GUESS=hppa1.0-hp-mpeix - ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*) - GUESS=hppa1.1-hp-osf - ;; - hp8??:OSF1:*:*) - GUESS=hppa1.0-hp-osf - ;; - i*86:OSF1:*:*) - if test -x /usr/sbin/sysversion ; then - GUESS=$UNAME_MACHINE-unknown-osf1mk - else - GUESS=$UNAME_MACHINE-unknown-osf1 - fi - ;; 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- powerpc) UNAME_PROCESSOR=powerpc64 ;; - esac - fi - # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc - if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \ - (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ - grep IS_PPC >/dev/null - then - UNAME_PROCESSOR=powerpc - fi - elif test "$UNAME_PROCESSOR" = i386 ; then - # uname -m returns i386 or x86_64 - UNAME_PROCESSOR=$UNAME_MACHINE - fi - GUESS=$UNAME_PROCESSOR-apple-darwin$UNAME_RELEASE - ;; - *:procnto*:*:* | *:QNX:[0123456789]*:*) - UNAME_PROCESSOR=`uname -p` - if test "$UNAME_PROCESSOR" = x86; then - UNAME_PROCESSOR=i386 - UNAME_MACHINE=pc - fi - GUESS=$UNAME_PROCESSOR-$UNAME_MACHINE-nto-qnx$UNAME_RELEASE - ;; - *:QNX:*:4*) - GUESS=i386-pc-qnx - ;; - NEO-*:NONSTOP_KERNEL:*:*) - GUESS=neo-tandem-nsk$UNAME_RELEASE - ;; - NSE-*:NONSTOP_KERNEL:*:*) - GUESS=nse-tandem-nsk$UNAME_RELEASE - ;; - NSR-*:NONSTOP_KERNEL:*:*) - GUESS=nsr-tandem-nsk$UNAME_RELEASE - ;; - NSV-*:NONSTOP_KERNEL:*:*) - GUESS=nsv-tandem-nsk$UNAME_RELEASE - ;; - NSX-*:NONSTOP_KERNEL:*:*) - GUESS=nsx-tandem-nsk$UNAME_RELEASE - ;; - *:NonStop-UX:*:*) - GUESS=mips-compaq-nonstopux - ;; - BS2000:POSIX*:*:*) - GUESS=bs2000-siemens-sysv - ;; - DS/*:UNIX_System_V:*:*) - GUESS=$UNAME_MACHINE-$UNAME_SYSTEM-$UNAME_RELEASE - ;; - *:Plan9:*:*) - # "uname -m" is not consistent, so use $cputype instead. 386 - # is converted to i386 for consistency with other x86 - # operating systems. - if test "${cputype-}" = 386; then - UNAME_MACHINE=i386 - elif test "x${cputype-}" != x; then - UNAME_MACHINE=$cputype - fi - GUESS=$UNAME_MACHINE-unknown-plan9 - ;; - *:TOPS-10:*:*) - GUESS=pdp10-unknown-tops10 - ;; - *:TENEX:*:*) - GUESS=pdp10-unknown-tenex - ;; - KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*) - GUESS=pdp10-dec-tops20 - ;; - XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*) - GUESS=pdp10-xkl-tops20 - ;; - *:TOPS-20:*:*) - GUESS=pdp10-unknown-tops20 - ;; - *:ITS:*:*) - GUESS=pdp10-unknown-its - ;; - SEI:*:*:SEIUX) - GUESS=mips-sei-seiux$UNAME_RELEASE - ;; - *:DragonFly:*:*) - DRAGONFLY_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'` - GUESS=$UNAME_MACHINE-unknown-dragonfly$DRAGONFLY_REL - ;; - *:*VMS:*:*) - UNAME_MACHINE=`(uname -p) 2>/dev/null` - case $UNAME_MACHINE in - A*) GUESS=alpha-dec-vms ;; - I*) GUESS=ia64-dec-vms ;; - V*) GUESS=vax-dec-vms ;; - esac ;; - *:XENIX:*:SysV) - GUESS=i386-pc-xenix - ;; - i*86:skyos:*:*) - SKYOS_REL=`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'` - GUESS=$UNAME_MACHINE-pc-skyos$SKYOS_REL - ;; - i*86:rdos:*:*) - GUESS=$UNAME_MACHINE-pc-rdos - ;; - i*86:Fiwix:*:*) - GUESS=$UNAME_MACHINE-pc-fiwix - ;; - *:AROS:*:*) - GUESS=$UNAME_MACHINE-unknown-aros - ;; - x86_64:VMkernel:*:*) - GUESS=$UNAME_MACHINE-unknown-esx - ;; - amd64:Isilon\ OneFS:*:*) - GUESS=x86_64-unknown-onefs - ;; - *:Unleashed:*:*) - GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE - ;; -esac - -# Do we have a guess based on uname results? -if test "x$GUESS" != x; then - echo "$GUESS" - exit -fi - -# No uname command or uname output not recognized. -set_cc_for_build -cat > "$dummy.c" < -#include -#endif -#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__) -#if defined (vax) || defined (__vax) || defined (__vax__) || defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__) -#include -#if defined(_SIZE_T_) || defined(SIGLOST) -#include -#endif -#endif -#endif -main () -{ -#if defined (sony) -#if defined (MIPSEB) - /* BFD wants "bsd" instead of "newsos". Perhaps BFD should be changed, - I don't know.... */ - printf ("mips-sony-bsd\n"); exit (0); -#else -#include - printf ("m68k-sony-newsos%s\n", -#ifdef NEWSOS4 - "4" -#else - "" -#endif - ); exit (0); -#endif -#endif - -#if defined (NeXT) -#if !defined (__ARCHITECTURE__) -#define __ARCHITECTURE__ "m68k" -#endif - int version; - version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`; - if (version < 4) - printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version); - else - printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version); - exit (0); -#endif - -#if defined (MULTIMAX) || defined (n16) -#if defined (UMAXV) - printf ("ns32k-encore-sysv\n"); exit (0); -#else -#if defined (CMU) - printf ("ns32k-encore-mach\n"); exit (0); -#else - printf ("ns32k-encore-bsd\n"); exit (0); -#endif -#endif -#endif - -#if defined (__386BSD__) - printf ("i386-pc-bsd\n"); exit (0); -#endif - -#if defined (sequent) -#if defined (i386) - printf ("i386-sequent-dynix\n"); exit (0); -#endif -#if defined (ns32000) - printf ("ns32k-sequent-dynix\n"); exit (0); -#endif -#endif - -#if defined (_SEQUENT_) - struct utsname un; - - uname(&un); - if (strncmp(un.version, "V2", 2) == 0) { - printf ("i386-sequent-ptx2\n"); exit (0); - } - if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */ - printf ("i386-sequent-ptx1\n"); exit (0); - } - printf ("i386-sequent-ptx\n"); exit (0); -#endif - -#if defined (vax) -#if !defined (ultrix) -#include -#if defined (BSD) -#if BSD == 43 - printf ("vax-dec-bsd4.3\n"); exit (0); -#else -#if BSD == 199006 - printf ("vax-dec-bsd4.3reno\n"); exit (0); -#else - printf ("vax-dec-bsd\n"); exit (0); -#endif -#endif -#else - printf ("vax-dec-bsd\n"); exit (0); -#endif -#else -#if defined(_SIZE_T_) || defined(SIGLOST) - struct utsname un; - uname (&un); - printf ("vax-dec-ultrix%s\n", un.release); exit (0); -#else - printf ("vax-dec-ultrix\n"); exit (0); -#endif -#endif -#endif -#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__) -#if defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__) -#if defined(_SIZE_T_) || defined(SIGLOST) - struct utsname *un; - uname (&un); - printf ("mips-dec-ultrix%s\n", un.release); exit (0); -#else - printf ("mips-dec-ultrix\n"); exit (0); -#endif -#endif -#endif - -#if defined (alliant) && defined (i860) - printf ("i860-alliant-bsd\n"); exit (0); -#endif - - exit (1); -} -EOF - -$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=`"$dummy"` && - { echo "$SYSTEM_NAME"; exit; } - -# Apollos put the system type in the environment. -test -d /usr/apollo && { echo "$ISP-apollo-$SYSTYPE"; exit; } - -echo "$0: unable to guess system type" >&2 - -case $UNAME_MACHINE:$UNAME_SYSTEM in - mips:Linux | mips64:Linux) - # If we got here on MIPS GNU/Linux, output extra information. - cat >&2 <&2 <&2 </dev/null || echo unknown` -uname -r = `(uname -r) 2>/dev/null || echo unknown` -uname -s = `(uname -s) 2>/dev/null || echo unknown` -uname -v = `(uname -v) 2>/dev/null || echo unknown` - -/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null` -/bin/uname -X = `(/bin/uname -X) 2>/dev/null` - -hostinfo = `(hostinfo) 2>/dev/null` -/bin/universe = `(/bin/universe) 2>/dev/null` -/usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null` -/bin/arch = `(/bin/arch) 2>/dev/null` -/usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null` -/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null` - -UNAME_MACHINE = "$UNAME_MACHINE" -UNAME_RELEASE = "$UNAME_RELEASE" -UNAME_SYSTEM = "$UNAME_SYSTEM" -UNAME_VERSION = "$UNAME_VERSION" -EOF -fi - -exit 1 - -# Local variables: -# eval: (add-hook 'before-save-hook 'time-stamp) -# time-stamp-start: "timestamp='" -# time-stamp-format: "%:y-%02m-%02d" -# time-stamp-end: "'" -# End: diff --git a/mk/config.mk b/mk/config.mk deleted file mode 100644 index 5350042c..00000000 --- a/mk/config.mk +++ /dev/null @@ -1,100 +0,0 @@ -# we need this line or else default 'make' behavior will only generate host-config.mk -do-make-all: all - -$(TOP)/build/host-config.mk: $(TOP)/build/config.guess - @(host_triple=`$(TOP)/build/config.guess`; \ - echo HOST_TRIPLE:=$$host_triple > $@; \ - echo $$host_triple | awk '{split($$0,a,"-"); print "HOST_CPU:=" a[1] "\nHOST_VENDOR:=" a[2] "\nHOST_OS:=" a[3] "\n"}' >> $@) - --include $(TOP)/build/host-config.mk - -# empty suffix: use the llvm tools on PATH (homebrew llvm, currently 22.x) -LLVM_SUFFIX?= - -# we don't care about the version here -HOST_OS:=$(patsubst darwin%,darwin,$(HOST_OS)) - -PRODUCT_NAME=EchoJS -PRODUCT_VERSION=0.1.0 - -PRODUCT_RELEASE_NOTES_URL=http://toshokelectric.com/echojs/release_notes -PRODUCT_GITHUB_URL=https://github.com/toshok/echo-js -PRODUCT_EMAIL=toshok@toshokelectric.com -ORGANIZATION=com.toshokelectric - - -PRODUCT_name:=$(shell echo $(PRODUCT_NAME) | tr [:upper:] [:lower:]) - -PRODUCT_UTI=$(ORGANIZATION).$(PRODUCT_NAME) - -# the place where we stuff everything -PRODUCT_INSTALL_ROOT=/Library/Frameworks/$(PRODUCT_NAME).framework - -MKDIR=mkdir -p -INSTALL=install -CP=cp -CC?=clang -CXX?=clang++ - -CFLAGS=-g -O0 -Wall -I. -Wno-unused-function -Wno-unused-variable - -MIN_IOS_VERSION=17.0 -MIN_OSX_VERSION=10.10 - -DEVELOPER_ROOT?=/Applications/Xcode.app/Contents/Developer -IOS_SDK_VERSION?=8.3 - -ifeq ($(HOST_OS),linux) -EJS_RUNLOOP_IMPL?=libuv -else -EJS_RUNLOOP_IMPL=darwin -endif - -LINUX_ARCH=-arch x86_64 -LINUX_CLANG_TRIPLE=x86_64-unknown-linux -LINUX_GNU_TRIPLE=x86_64-unknown-linux -LINUX_SHORT_TRIPLE=x86_64-linux -LINUX_CFLAGS=$(CFLAGS) -DTARGET_CPU_AMD64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -D_GNU_SOURCE - -MACOS_MARCH=arm64 -MACOS_ARCH=-arch $(MACOS_MARCH) -MACOS_CLANG_TRIPLE=arm64-apple-macos -MACOS_GNU_TRIPLE=arm64-apple-darwin -MACOS_SHORT_TRIPLE=arm64-macos -MACOS_MTRIPLE="arm64-apple-macosx$(MIN_OSX_VERSION).0" -MACOS_CFLAGS=$(CFLAGS) -DOSX=1 -DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -D_XOPEN_SOURCE -Wno-deprecated-declarations - -IOSSIM_MARCH=arm64 -IOSSIM_ARCH=-arch $(IOSSIM_MARCH) -IOSSIM_CLANG_TRIPLE=arm64-apple-ios-simulator -IOSSIM_GNU_TRIPLE=aarch64-apple-iossimulator -IOSSIM_SHORT_TRIPLE=arm64-iossim -IOSSIM_MTRIPLE="x86_64-apple-ios$(MIN_IOS_VERSION).0" -IOSSIM_ARCH_FLAGS=-DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -IOSSIM_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneSimulator.platform/Developer -IOSSIM_BIN=$(IOSSIM_ROOT)/usr/bin -IOSSIM_SYSROOT=$(IOSSIM_ROOT)/SDKs/iPhoneSimulator$(IOS_SDK_VERSION).sdk - -IOSDEV_MARCH=arm64 -IOSDEV_ARCH=-arch $(IOSDEV_MARCH) -IOSDEV_CLANG_TRIPLE=arm64-apple-ios -IOSDEV_GNU_TRIPLE=aarch64-apple-ios -IOSDEV_SHORT_TRIPLE=arm64-ios -IOSDEV_MTRIPLE="arm64-apple-ios$(MIN_IOS_VERSION).0" -IOSDEV_ARCH_FLAGS=-DTARGET_CPU_ARM64=1 -DEJS_BITS_PER_WORD=64 -DIS_LITTLE_ENDIAN=1 -IOSDEV_ROOT=$(DEVELOPER_ROOT)/Platforms/iPhoneOS.platform/Developer -IOSDEV_BIN=$(IOSDEV_ROOT)/usr/bin -IOSDEV_SYSROOT=$(IOSDEV_ROOT)/SDKs/iPhoneOS$(IOS_SDK_VERSION).sdk - -IOSSIM_CFLAGS=$(IOSSIM_ARCH) $(IOSSIM_ARCH_FLAGS) $(CFLAGS) -DIOS=1 -isysroot $(IOSSIM_SYSROOT) -miphoneos-version-min=$(MIN_IOS_VERSION) -D_XOPEN_SOURCE -Wno-deprecated-declarations -IOSDEV_CFLAGS=$(IOSDEV_ARCH) $(IOSDEV_ARCH_FLAGS) $(CFLAGS) -DIOS=1 -isysroot $(IOSDEV_SYSROOT) -miphoneos-version-min=$(MIN_IOS_VERSION) -D_XOPEN_SOURCE -Wno-deprecated-declarations - -# directories used during make install -prefix?=/usr/local - -bindir:=$(DESTDIR)$(prefix)/bin -includedir:=$(DESTDIR)$(prefix)/include -libdir:=$(DESTDIR)$(prefix)/lib -archlibdir:=$(libdir)/$(HOST_CPU)-$(HOST_OS) - --include $(TOP)/build/config-local.mk diff --git a/mk/iOS.cmake b/mk/iOS.cmake deleted file mode 100644 index b248d1e8..00000000 --- a/mk/iOS.cmake +++ /dev/null @@ -1,215 +0,0 @@ -# This file is based off of the Platform/Darwin.cmake and Platform/UnixPaths.cmake -# files which are included with CMake 2.8.4 -# It has been altered for iOS development - -# Options: -# -# IOS_PLATFORM = OS (default) or SIMULATOR or SIMULATOR64 -# This decides if SDKS will be selected from the iPhoneOS.platform or iPhoneSimulator.platform folders -# OS - the default, used to build for iPhone and iPad physical devices, which have an arm arch. -# SIMULATOR - used to build for the Simulator platforms, which have an x86 arch. -# -# CMAKE_IOS_DEVELOPER_ROOT = automatic(default) or /path/to/platform/Developer folder -# By default this location is automatcially chosen based on the IOS_PLATFORM value above. -# If set manually, it will override the default location and force the user of a particular Developer Platform -# -# CMAKE_IOS_SDK_ROOT = automatic(default) or /path/to/platform/Developer/SDKs/SDK folder -# By default this location is automatcially chosen based on the CMAKE_IOS_DEVELOPER_ROOT value. -# In this case it will always be the most up-to-date SDK found in the CMAKE_IOS_DEVELOPER_ROOT path. -# If set manually, this will force the use of a specific SDK version - -# Macros: -# -# set_xcode_property (TARGET XCODE_PROPERTY XCODE_VALUE) -# A convenience macro for setting xcode specific properties on targets -# example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1") -# -# find_host_package (PROGRAM ARGS) -# A macro used to find executable programs on the host system, not within the iOS environment. -# Thanks to the android-cmake project for providing the command - -# Standard settings -set(CMAKE_SYSTEM_NAME Darwin) -set(CMAKE_SYSTEM_VERSION 1) -set(UNIX True) -set(APPLE True) -set(IOS True) - -# Required as of cmake 2.8.10 -set(CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING "Force unset of the deployment target for iOS" FORCE) - -# Determine the cmake host system version so we know where to find the iOS SDKs -find_program(CMAKE_UNAME uname /bin /usr/bin /usr/local/bin) - -if(CMAKE_UNAME) - exec_program(uname ARGS -r OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION) - string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1" DARWIN_MAJOR_VERSION "${CMAKE_HOST_SYSTEM_VERSION}") -endif(CMAKE_UNAME) - -# Force the compilers to gcc for iOS -include(CMakeForceCompiler) -CMAKE_FORCE_C_COMPILER(/usr/bin/clang Apple) -CMAKE_FORCE_CXX_COMPILER(/usr/bin/clang++ Apple) -set(CMAKE_AR ar CACHE FILEPATH "" FORCE) - -# Skip the platform compiler checks for cross compiling -set(CMAKE_CXX_COMPILER_WORKS TRUE) -set(CMAKE_C_COMPILER_WORKS TRUE) - -# All iOS/Darwin specific settings - some may be redundant -set(CMAKE_SHARED_LIBRARY_PREFIX "lib") -set(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib") -set(CMAKE_SHARED_MODULE_PREFIX "lib") -set(CMAKE_SHARED_MODULE_SUFFIX ".so") -set(CMAKE_MODULE_EXISTS 1) -set(CMAKE_DL_LIBS "") - -set(CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ") -set(CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ") -set(CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}") -set(CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}") - -# Hidden visibilty is required for cxx on iOS -set(CMAKE_C_FLAGS_INIT "") -set(CMAKE_CXX_FLAGS_INIT "-fvisibility=hidden -fvisibility-inlines-hidden") - -set(CMAKE_C_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}") -set(CMAKE_CXX_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}") - -set(CMAKE_PLATFORM_HAS_INSTALLNAME 1) -set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -headerpad_max_install_names") -set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -headerpad_max_install_names") -set(CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,") -set(CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,") -set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a") - -# hack: if a new cmake (which uses CMAKE_INSTALL_NAME_TOOL) runs on an old build tree -# (where install_name_tool was hardcoded) and where CMAKE_INSTALL_NAME_TOOL isn't in the cache -# and still cmake didn't fail in CMakeFindBinUtils.cmake (because it isn't rerun) -# hardcode CMAKE_INSTALL_NAME_TOOL here to install_name_tool, so it behaves as it did before, Alex -if(NOT DEFINED CMAKE_INSTALL_NAME_TOOL) - find_program(CMAKE_INSTALL_NAME_TOOL install_name_tool) -endif(NOT DEFINED CMAKE_INSTALL_NAME_TOOL) - -# Setup iOS platform unless specified manually with IOS_PLATFORM -if(NOT DEFINED IOS_PLATFORM) - set(IOS_PLATFORM "OS") -endif(NOT DEFINED IOS_PLATFORM) - -set(IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING "Type of iOS Platform") - -# Setup building for arm64 or not -if(NOT DEFINED BUILD_ARM64) - set(BUILD_ARM64 true) -endif(NOT DEFINED BUILD_ARM64) - -set(BUILD_ARM64 ${BUILD_ARM64} CACHE STRING "Build arm64 arch or not") - -# Check the platform selection and setup for developer root -if(${IOS_PLATFORM} STREQUAL "OS") - set(IOS_PLATFORM_LOCATION "iPhoneOS.platform") - - # This causes the installers to properly locate the output libraries - set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos") -elseif(${IOS_PLATFORM} STREQUAL "SIMULATOR") - set(SIMULATOR true) - set(IOS_PLATFORM_LOCATION "iPhoneSimulator.platform") - - # This causes the installers to properly locate the output libraries - set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator") -elseif(${IOS_PLATFORM} STREQUAL "SIMULATOR64") - set(SIMULATOR true) - set(IOS_PLATFORM_LOCATION "iPhoneSimulator.platform") - - # This causes the installers to properly locate the output libraries - set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator") -else(${IOS_PLATFORM} STREQUAL "OS") - message(FATAL_ERROR "Unsupported IOS_PLATFORM value selected. Please choose OS or SIMULATOR") -endif(${IOS_PLATFORM} STREQUAL "OS") - -# Setup iOS developer location unless specified manually with CMAKE_IOS_DEVELOPER_ROOT -# Note Xcode 4.3 changed the installation location, choose the most recent one available -exec_program(/usr/bin/xcode-select ARGS -print-path OUTPUT_VARIABLE CMAKE_XCODE_DEVELOPER_DIR) -set(XCODE_POST_43_ROOT "${CMAKE_XCODE_DEVELOPER_DIR}/Platforms/${IOS_PLATFORM_LOCATION}/Developer") -set(XCODE_PRE_43_ROOT "/Developer/Platforms/${IOS_PLATFORM_LOCATION}/Developer") - -if(NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT) - if(EXISTS ${XCODE_POST_43_ROOT}) - set(CMAKE_IOS_DEVELOPER_ROOT ${XCODE_POST_43_ROOT}) - elseif(EXISTS ${XCODE_PRE_43_ROOT}) - set(CMAKE_IOS_DEVELOPER_ROOT ${XCODE_PRE_43_ROOT}) - endif(EXISTS ${XCODE_POST_43_ROOT}) -endif(NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT) - -set(CMAKE_IOS_DEVELOPER_ROOT ${CMAKE_IOS_DEVELOPER_ROOT} CACHE PATH "Location of iOS Platform") - -# Find and use the most recent iOS sdk unless specified manually with CMAKE_IOS_SDK_ROOT -if(NOT DEFINED CMAKE_IOS_SDK_ROOT) - file(GLOB _CMAKE_IOS_SDKS "${CMAKE_IOS_DEVELOPER_ROOT}/SDKs/*") - - if(_CMAKE_IOS_SDKS) - list(SORT _CMAKE_IOS_SDKS) - list(REVERSE _CMAKE_IOS_SDKS) - list(GET _CMAKE_IOS_SDKS 0 CMAKE_IOS_SDK_ROOT) - else(_CMAKE_IOS_SDKS) - message(FATAL_ERROR "No iOS SDK's found in default search path ${CMAKE_IOS_DEVELOPER_ROOT}. Manually set CMAKE_IOS_SDK_ROOT or install the iOS SDK.") - endif(_CMAKE_IOS_SDKS) - - message(STATUS "Toolchain using default iOS SDK: ${CMAKE_IOS_SDK_ROOT}") -endif(NOT DEFINED CMAKE_IOS_SDK_ROOT) - -set(CMAKE_IOS_SDK_ROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Location of the selected iOS SDK") - -# Set the sysroot default to the most recent SDK -set(CMAKE_OSX_SYSROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Sysroot used for iOS support") - -# set the architecture for iOS -if(${IOS_PLATFORM} STREQUAL "OS") - set(IOS_ARCH arm64) # XXX(toshok) armv7s arm64 -elseif(${IOS_PLATFORM} STREQUAL "SIMULATOR") - set(IOS_ARCH arm64) -endif(${IOS_PLATFORM} STREQUAL "OS") - -# set (CMAKE_OSX_ARCHITECTURES ${IOS_ARCH} CACHE string "Build architecture for iOS") -set(CMAKE_CXX_FLAGS "-arch ${IOS_ARCH} -isysroot ${IOS_SYSROOT} -miphoneos-version-min=${MIN_IOS_VERSION}") -set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "ios c++ flags") -set(CMAKE_C_FLAGS "-arch ${IOS_ARCH} -isysroot ${IOS_SYSROOT} -miphoneos-version-min=${MIN_IOS_VERSION}") -set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} CACHE STRING "ios c flags") - -# Set the find root to the iOS developer roots and to user defined paths -set(CMAKE_FIND_ROOT_PATH ${CMAKE_IOS_DEVELOPER_ROOT} ${CMAKE_IOS_SDK_ROOT} ${CMAKE_PREFIX_PATH} CACHE STRING "iOS find search path root") - -# default to searching for frameworks first -set(CMAKE_FIND_FRAMEWORK FIRST) - -# set up the default search directories for frameworks -set(CMAKE_SYSTEM_FRAMEWORK_PATH - ${CMAKE_IOS_SDK_ROOT}/System/Library/Frameworks - ${CMAKE_IOS_SDK_ROOT}/System/Library/PrivateFrameworks - ${CMAKE_IOS_SDK_ROOT}/Developer/Library/Frameworks -) - -# only search the iOS sdks, not the remainder of the host filesystem -set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY) -set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) -set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) - -# This little macro lets you set any XCode specific property -macro(set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE) - set_property(TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} ${XCODE_VALUE}) -endmacro(set_xcode_property) - -# This macro lets you find executable programs on the host system -macro(find_host_package) - set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) - set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER) - set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER) - set(IOS FALSE) - - find_package(${ARGN}) - - set(IOS TRUE) - set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY) - set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) - set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) -endmacro(find_host_package) diff --git a/mk/rules.mk b/mk/rules.mk deleted file mode 100644 index b18dd988..00000000 --- a/mk/rules.mk +++ /dev/null @@ -1,45 +0,0 @@ -all: all-local all-recurse all-hook -clean: clean-local clean-recurse clean-hook -install: install-local install-recurse install-hook -dist: dist-local dist-recurse dist-hook - -all-local:: -clean-local:: -install-local:: -dist-local:: - -all-recurse:: all-local -clean-recurse:: clean-local -install-recurse:: install-local -dist-recurse:: dist-local - -all-hook:: all-local all-recurse -clean-hook:: clean-local clean-recurse -install-hook:: install-local install-recurse -dist-hook:: dist-local dist-recurse - -RECURSE_INTO_SUBDIRS= \ - @target=`echo $@ | sed -e s/-recurse//`; \ - for i in $(SUBDIRS); do \ - echo Making $$target in $$i; \ - $(MAKE) -C $$i $$target || exit 1; \ - done - -ifneq ($(SUBDIRS),) -all-recurse:: - $(RECURSE_INTO_SUBDIRS) - -clean-recurse:: - $(RECURSE_INTO_SUBDIRS) - -install-recurse:: - $(RECURSE_INTO_SUBDIRS) - -dist-recurse:: - $(RECURSE_INTO_SUBDIRS) -endif - -.PHONY: all all-recurse all-hook -.PHONY: clean clean-recurse clean-hook -.PHONY: install install-recurse install-hook -.PHONY: dist dist-recurse dist-hook diff --git a/mk/utils.mk b/mk/utils.mk deleted file mode 100644 index 5b485da6..00000000 --- a/mk/utils.mk +++ /dev/null @@ -1,21 +0,0 @@ -replace=-e "s,@$1@,$($1),g" - -dosed=sed $(call replace,ORGANIZATION) \ - $(call replace,PRODUCT_RELEASE_NOTES_URL) \ - $(call replace,PRODUCT_VERSION) \ - $(call replace,PRODUCT_INSTALL_ROOT) \ - $(call replace,PRODUCT_NAME) \ - $(call replace,PRODUCT_UTI) \ - $(call replace,PRODUCT_GITHUB_URL) \ - $(call replace,PRODUCT_EMAIL) \ - $(call replace,PRODUCT_name) \ - $(call replace,INSTALLKBYTES) \ - $(call replace,NUMFILES) - -# arg1 = input path -# arg2 = output path -define rewrite - @echo [GEN] $2 - @$(dosed) < $1 > $2 -endef - diff --git a/node-compat/Makefile b/node-compat/Makefile deleted file mode 100644 index 8608ab6e..00000000 --- a/node-compat/Makefile +++ /dev/null @@ -1,129 +0,0 @@ -TOP=.. - -include $(TOP)/mk/config.mk - -LIBRARY=libejsnodecompat-module.a -C_SOURCES= \ - ejs-node-compat.c - -CFLAGS += -I../runtime - -ejs-atoms-gen.c: ejs-atoms.h gen-atoms.js - @echo [GEN] $@ && ./gen-atoms.js $< > .tmp-$@ && mv .tmp-$@ $@ - -ifeq ($(HOST_OS),linux) -ALL_LIBRARIES=$(LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) - -LINUX_OBJECTS=$(C_SOURCES:%.c=%.o.linux) - -ALL_OBJECTS=$(LINUX_OBJECTS) - -$(LIBRARY): $(LINUX_OBJECTS) - @echo [ar linux] $@ && /usr/bin/ar rc $@ $(LINUX_OBJECTS) - -%.o.linux: %.c - @mkdir -p .deps - @$(CC) -MM $(LINUX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.linux,,`/$@/ > .deps/$@-deps - @echo [$(CC) linux] $< && $(CC) $(LINUX_CFLAGS) -c -o $@ $< - --include $(patsubst %.o.linux,.deps/%.o.linux-deps,$(LINUX_OBJECTS)) -endif - -ifeq ($(HOST_OS),darwin) - -OBJC_SOURCES= - -OSX_OBJECTS=$(C_SOURCES:%.c=%.o.osx) $(OBJC_SOURCES:%.m=%.o.osx) -SIM_OBJECTS=$(C_SOURCES:%.c=%.o.sim) $(OBJC_SOURCES:%.m=%.o.sim) -DEV_OBJECTS=$(C_SOURCES:%.c=%.o.armv7) $(OBJC_SOURCES:%.m=%.o.armv7) -DEVS_OBJECTS=$(C_SOURCES:%.c=%.o.armv7s) $(OBJC_SOURCES:%.m=%.o.armv7s) - -analyze_plists_c = $(C_SOURCES:%.c=%.plist) -analyze_plists_objc = $(OBJC_SOURCES:%.m=%.plist) - -OSX_LIBRARY=$(LIBRARY) -SIM_LIBRARY=$(LIBRARY).sim -DEV_LIBRARY=$(LIBRARY).armv7 -DEVS_LIBRARY=$(LIBRARY).armv7s - -ifneq ($(CIRCLE_BUILD_NUM),) -# on circleci we only build the osx library -ALL_LIBRARIES=$(OSX_LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) -else -# on local builds we build all the libraries (XXX need to figure out how to accurately target those platforms first) -#ALL_LIBRARIES=$(OSX_LIBRARY) $(SIM_LIBRARY) $(DEV_LIBRARY) $(DEVS_LIBRARY) -#ALL_TARGETS=$(ALL_LIBRARIES) $(analyze_plists_c) $(analyze_plists_objc) -ALL_LIBRARIES=$(OSX_LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) -endif - -ALL_OBJECTS=$(SIM_OBJECTS) $(DEV_OBJECTS) $(DEVS_OBJECTS) $(OSX_OBJECTS) - -$(OSX_LIBRARY): $(OSX_OBJECTS) - @echo [ar osx] $@ && /usr/bin/ar rc $@ $(OSX_OBJECTS) - -$(SIM_LIBRARY): $(SIM_OBJECTS) - @echo [ar sim] $@ && /usr/bin/ar rc $@ $(SIM_OBJECTS) - -$(DEV_LIBRARY): $(DEV_OBJECTS) - @echo [ar armv7] $@ && /usr/bin/ar rc $@ $(DEV_OBJECTS) - -$(DEVS_LIBRARY): $(DEVS_OBJECTS) - @echo [ar armv7s] $@ && /usr/bin/ar rc $@ $(DEVS_OBJECTS) - -%.o.osx: %.c - @mkdir -p .deps - @$(CC) -MM $(OSX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.osx,,`/$@/ > .deps/$@-deps - @echo [$(CC) osx] $< && $(CC) -ObjC $(OSX_CFLAGS) -c -o $@ $< - -%.o.osx: %.ll - @echo [llc osx] $< && llc$(LLVM_SUFFIX) -filetype=obj -o=$@ -O2 $< - -%.o.sim: %.c - @mkdir -p .deps - @$(CC) -MM $(IOSSIM_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.sim,,`/$@/ > .deps/$@-deps - @echo [$(CC) sim] $< && PATH=$(IOSSIM_BIN):$$PATH $(CC) -ObjC $(IOSSIM_CFLAGS) -c -o $@ $< - -%.o.sim: %.ll - @echo [llc sim] $< && llc$(LLVM_SUFFIX) -march=x86 -filetype=obj -o=$@ -O2 $< - -%.o.armv7: %.c - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSDEV_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7,,`/$@/ > .deps/$@-deps - @echo [$(CC) armv7] $< && PATH=$(IOSDEV_BIN):$$PATH $(CC) -ObjC $(IOSDEV_CFLAGS) -c -o $@ $< - -%.o.armv7: %.ll - @echo [llc armv7] $< && llc$(LLVM_SUFFIX) -march=arm -filetype=obj -o=$@ -O2 $< - -%.o.armv7s: %.c - @mkdir -p .deps - @$(CC) -MM -ObjC $(IOSDEVS_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.armv7s,,`/$@/ > .deps/$@-deps - @echo [$(CC) armv7s] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CC) -ObjC $(IOSDEVS_CFLAGS) -c -o $@ $< - -%.o.armv7s: %.ll - @echo [llc armv7s] $< && llc$(LLVM_SUFFIX) -march=aarch64 -filetype=obj -o=$@ -O2 $< - -$(analyze_plists_c): %.plist: %.c - @echo [$(CC) analyze] $< && PATH=$(IOSDEVS_BIN):$$PATH $(CC) $(OSX_CFLAGS) --analyze $< -o $@ - --include $(patsubst %.o.osx,.deps/%.o.osx-deps,$(OSX_OBJECTS)) --include $(patsubst %.o.sim,.deps/%.o.sim-deps,$(SIM_OBJECTS)) --include $(patsubst %.o.armv7,.deps/%.o.armv7-deps,$(DEV_OBJECTS)) --include $(patsubst %.o.armv7s,.deps/%.o.armv7s-deps,$(DEVS_OBJECTS)) -endif - -all-local:: $(ALL_TARGETS) - -clean-local:: - rm -f test $(ALL_OBJECTS) $(ALL_LIBRARIES) ejs-atoms-gen.c $(analyze_plists_c) $(analyze_plists_objc) - -#XXX(toshok) this doesn't work for osx where we want to install multiple libraries to different archlibdirs... -install-local:: - @$(MKDIR) $(libdir) - @$(MKDIR) $(archlibdir) - $(INSTALL) -c node-compat.ejs $(libdir) - $(INSTALL) -c $(LIBRARY) $(archlibdir) - -include $(TOP)/mk/build.mk diff --git a/node-llvm/BUCK b/node-llvm/BUCK index f24ae743..68076828 100644 --- a/node-llvm/BUCK +++ b/node-llvm/BUCK @@ -1,5 +1,5 @@ # The node native addon that gives the node-hosted (stage0) compiler access -# to LLVM. Built out-of-band with node-gyp (`make -C node-llvm`); buck just +# to LLVM. Built out-of-band with node-gyp (`./build-addon.sh`); buck just # picks up the built addon. # # TODO(buck2): drive node-gyp from a genrule so this is built hermetically. diff --git a/node-llvm/Makefile b/node-llvm/Makefile deleted file mode 100644 index 6b14b179..00000000 --- a/node-llvm/Makefile +++ /dev/null @@ -1,33 +0,0 @@ -TOP=.. - --include $(TOP)/mk/config.mk - -LLVM_CONFIG=llvm-config$(LLVM_SUFFIX) - -LLVM_CXXFLAGS := $(shell $(LLVM_CONFIG) --cxxflags) -LLVM_CPPFLAGS := $(shell $(LLVM_CONFIG) --cppflags) -LLVM_INCLUDEDIR := $(shell $(LLVM_CONFIG) --includedir) - -LLVM_CXXFLAGS := $(subst $(LLVM_CPPFLAGS),,$(LLVM_CXXFLAGS)) -LLVM_DEFINES := $(subst -I$(LLVM_INCLUDEDIR),,$(LLVM_CPPFLAGS)) -LLVM_DEFINES := $(subst -D,,$(LLVM_DEFINES)) - -LLVM_LINKFLAGS := $(shell $(LLVM_CONFIG) --ldflags --libs) - -MIN_OSX_VERSION?=10.9 - -all-local:: build - -build: configure - @CC="$(CC)" CXX="$(CXX)" LLVM_CXXFLAGS="$(LLVM_CXXFLAGS)" LLVM_INCLUDEDIR="$(LLVM_INCLUDEDIR)" LLVM_LINKFLAGS="$(LLVM_LINKFLAGS)" LLVM_DEFINES="$(LLVM_DEFINES)" MIN_OSX_VERSION="$(MIN_OSX_VERSION)" node-gyp build - -configure: - @echo "LLVM LINKFLAGS == $(LLVM_LINKFLAGS)" - @$(CC) --version - @$(CXX) --version - @CC="$(CC)" CXX="$(CXX)" LLVM_CXXFLAGS="$(LLVM_CXXFLAGS)" LLVM_INCLUDEDIR="$(LLVM_INCLUDEDIR)" LLVM_LINKFLAGS="$(LLVM_LINKFLAGS)" LLVM_DEFINES="$(LLVM_DEFINES)" MIN_OSX_VERSION="$(MIN_OSX_VERSION)" node-gyp configure - -clean-local:: - node-gyp clean - --include $(TOP)/mk/build.mk diff --git a/node-llvm/build-addon.sh b/node-llvm/build-addon.sh new file mode 100755 index 00000000..fb35b315 --- /dev/null +++ b/node-llvm/build-addon.sh @@ -0,0 +1,23 @@ +#!/bin/bash +# Builds the node-llvm addon (build/Release/llvm.node), which the stage0 +# (node-hosted) compiler uses to drive llvm. //node-llvm:llvm.node picks +# up the built addon; run this after changing node-llvm sources or +# switching llvm versions. +# +# usage: ./build-addon.sh [llvm-prefix] (default: /opt/homebrew/opt/llvm) +set -euo pipefail +cd "$(dirname "$0")" + +LLVM_PREFIX="${1:-/opt/homebrew/opt/llvm}" +LLVM_CONFIG="$LLVM_PREFIX/bin/llvm-config" + +export PATH="$LLVM_PREFIX/bin:$PATH" + +LLVM_CXXFLAGS="$($LLVM_CONFIG --cxxflags) -fno-rtti" \ +LLVM_INCLUDEDIR="$($LLVM_CONFIG --includedir)" \ +LLVM_DEFINES="" \ +LLVM_LINKFLAGS="$($LLVM_CONFIG --ldflags --libs)" \ +MIN_OSX_VERSION=11.0 \ + npx -y node-gyp@10 rebuild + +node -e "require('./build/Release/llvm.node'); console.log('llvm.node loads ok')" diff --git a/packaging/Makefile b/packaging/Makefile deleted file mode 100644 index 358d9842..00000000 --- a/packaging/Makefile +++ /dev/null @@ -1,93 +0,0 @@ -TOP=.. -include $(TOP)/mk/config.mk - -PWD:=$(shell pwd) - -.NOTPARALLEL: - -#INSTALLKBYTES:=$(shell du -sk $(DIST_ROOT) | cut -f 1) -#NUMFILES=$(shell find $(DIST_ROOT) | wc -l) - -# arg1 = input directory -# arg2 = output path -define make_archive - @echo [ARCHIVE] `basename $2` - @(cd $1; find . -print0 | pax -w -0 -x cpio 2>/dev/null | gzip -9 > $2) -endef - -# arg1 = input directory -# arg2 = output path -define mkbom - @echo [MKBOM] $2 - @mkbom $1 $2 -endef - -# arg1 = packagename-version -define mkpkg - @echo [PKG] $1.pkg - @(cd pkgtmp; xar -z --no-compress .*Payload --no-compress .*Scripts -c -f ../$1.pkg * && echo made $(TOP)/packaging/$1.pkg) -endef - -release: - @rm -rf pkgtmp Scripts - @mkdir -p pkgtmp/Resources/en.lproj - @mkdir -p pkgtmp/$(PRODUCT_name).pkg - $(call rewrite, package-template/Resources/en.lproj/Readme.rtf.in, pkgtmp/Resources/en.lproj/Readme) - $(call rewrite, package-template/Resources/en.lproj/License.rtf.in, pkgtmp/Resources/en.lproj/License) - $(call rewrite, package-template/Distribution.in, pkgtmp/Distribution) - $(call rewrite, package-template/product.pkg/PackageInfo.in, pkgtmp/$(PRODUCT_name).pkg/PackageInfo) - $(call mkbom,$(DIST_ROOT),pkgtmp/$(PRODUCT_name).pkg/Bom) - @mkdir Scripts - $(call rewrite, package-template/Scripts/postinstall.in, Scripts/postinstall) - @chmod a+x Scripts/postinstall - $(call make_archive,Scripts,$(PWD)/pkgtmp/$(PRODUCT_name).pkg/Scripts) - @rm -r Scripts - $(call make_archive,$(DIST_ROOT),$(PWD)/pkgtmp/$(PRODUCT_name).pkg/Payload) - $(call mkpkg,$(PRODUCT_NAME)-$(PRODUCT_VERSION)) - -npmtmp=npm-tmp -bindir=$(npmtmp)/bin -libdir=$(npmtmp)/lib -includedir=$(npmtmp)/include -libarchdir_osx=$(npmtmp)/lib/x86_64-darwin -libarchdir_sim=$(npmtmp)/lib/x86-darwin -libarchdir_dev=$(npmtmp)/lib/arm-darwin -npm-release-dist: - @rm -rf $(npmtmp) - @rm -f $(npmtmp)/package.json - @mkdir -p $(bindir) - @mkdir -p $(libdir) - @mkdir -p $(libarchdir_osx) - @mkdir -p $(libarchdir_sim) - @mkdir -p $(libarchdir_dev) - @mkdir -p $(npmtmp)/include - $(call rewrite, npm/package.json.in, $(npmtmp)/package.json) - @cp $(TOP)/ejs.exe $(bindir)/ejs - @cp $(TOP)/runtime/*.h $(includedir) - @cp $(TOP)/runtime/libecho.a $(libarchdir_osx) - @cp $(TOP)/external-deps/pcre-osx/.libs/libpcre16.a $(libarchdir_osx) - @cp $(TOP)/external-deps/double-conversion-osx/double-conversion/libdouble-conversion.a $(libarchdir_osx) - @cp $(TOP)/runtime/libecho.a.sim $(libarchdir_sim)/libecho.a - @cp $(TOP)/external-deps/pcre-iossim/.libs/libpcre16.a $(libarchdir_sim) - @cp $(TOP)/external-deps/double-conversion-iossim/double-conversion/libdouble-conversion.a $(libarchdir_sim) - @cp $(TOP)/runtime/libecho.a.armv7 $(libarchdir_dev)/libecho.a - @cp $(TOP)/external-deps/pcre-iosdev/.libs/libpcre16.a $(libarchdir_dev) - @cp $(TOP)/external-deps/double-conversion-iosdev/double-conversion/libdouble-conversion.a $(libarchdir_dev) - @cp $(TOP)/modules/objc_internal/objc_internal.ejs $(libdir) - @cp $(TOP)/node-compat/node-compat.ejs $(libdir) - @cp $(TOP)/node-compat/libejsnodecompat-module.a $(libarchdir_osx) - @cp $(TOP)/node-compat/libejsnodecompat-module.a.sim $(libarchdir_sim) - @cp $(TOP)/node-compat/libejsnodecompat-module.a.armv7 $(libarchdir_dev) - - - - -# gross, but for now strip the .a's we've installed so that we aren't passing debug/local symbols around... -dist-local:: - strip -S -x -X $(DIST_ROOT)/usr/lib/$(LIBCOFFEEKIT_A) - strip -S -x -X $(DIST_ROOT)/usr/lib/libjs_static.a - -clean-local:: - @rm -rf pkgtmp Scripts - -include $(TOP)/mk/build.mk diff --git a/release/Makefile b/release/Makefile deleted file mode 100644 index c650988a..00000000 --- a/release/Makefile +++ /dev/null @@ -1,37 +0,0 @@ -TOP=.. - -include $(TOP)/mk/config.mk - -TARBALL_DIR=$(PRODUCT_name)-$(PRODUCT_VERSION) -libdir=$(TARBALL_DIR)/lib -archlibdir=$(TARBALL_DIR)/lib/darwin-x86-64 -includedir=$(TARBALL_DIR)/include/runtime -bindir=$(TARBALL_DIR)/bin -sampledir=$(TARBALL_DIR)/samples - -osx-tarball: osx-tarball-deps - rm -f $(TARBALL_DIR).tar.bz2 - rm -rf $(TARBALL_DIR) - mkdir -p $(bindir) - mkdir -p $(archlibdir) - mkdir -p $(includedir) - mkdir -p $(sampledir) - cp release-readme.md $(TARBALL_DIR)/README.md - cp $(TOP)/ejs.exe $(bindir)/ejs - cp $(TOP)/runtime/*.h $(includedir) - cp $(TOP)/runtime/libecho.a $(archlibdir) - cp $(TOP)/external-deps/pcre-osx/.libs/libpcre16.a $(archlibdir) - cp $(TOP)/node-compat/node-compat.ejs $(libdir) - cp $(TOP)/node-compat/libejsnodecompat-module.a $(archlibdir) - cp $(TOP)/ejs-llvm/ejs-llvm.ejs $(libdir) - cp $(TOP)/ejs-llvm/libejsllvm-module.a $(archlibdir) - cp $(TOP)/test/fetch.js $(sampledir) - tar -cvzf $(TARBALL_DIR).tar.gz $(TARBALL_DIR) - -osx-tarball-deps: release-readme.md - $(MAKE) -C .. all bootstrap - -release-readme.md: release-readme.md.in - @echo [gen] $< && sed -e "s,@PRODUCT_VERSION@,$(PRODUCT_VERSION)," $< > $@ - -include $(TOP)/mk/build.mk diff --git a/runtime/Makefile b/runtime/Makefile deleted file mode 100644 index 3a17d8af..00000000 --- a/runtime/Makefile +++ /dev/null @@ -1,212 +0,0 @@ -TOP=.. - -include $(TOP)/mk/config.mk - -LIBRARY=libecho.a -C_SOURCES= \ - ejs-arguments.c \ - ejs-array.c \ - ejs-boolean.c \ - ejs-closureenv.c \ - ejs-console.c \ - ejs-date.c \ - ejs-error.c \ - ejs-exception.c \ - ejs-function.c \ - ejs-gc.c \ - ejs-generator.c \ - ejs-init.c \ - ejs-json.c \ - ejs-map.c \ - ejs-math.c \ - ejs-module.c \ - ejs-number.c \ - ejs-object.c \ - ejs-ops.c \ - ejs-process.c \ - ejs-promise.c \ - ejs-proxy.c \ - ejs-recording.c \ - ejs-reflect.c \ - ejs-regexp.c \ - ejs-require.c \ - ejs-set.c \ - ejs-stream.c \ - ejs-string.c \ - ejs-symbol.c \ - ejs-timers.c \ - ejs-typedarrays.c \ - ejs-types.c \ - ejs-uri.c \ - ejs-weakmap.c \ - ejs-weakset.c \ - main.c \ - parson.c - -CPP_SOURCES= \ - ejs-dtoa.cpp - -VPATH=.:../external-deps/parson - -ejs-atoms-gen.c: ejs-atoms.h gen-atoms.js - @echo [GEN] $@ && ./gen-atoms.js $< > .tmp-$@ && mv .tmp-$@ $@ - -ifeq ($(HOST_OS),linux) -ALL_LIBRARIES=$(LIBRARY) -ALL_TARGETS=$(ALL_LIBRARIES) - -ifeq ($(EJS_RUNLOOP_IMPL),noop) -RUNLOOP_DEF=-DNOOP_RUNLOOP=1 -C_SOURCES += ejs-runloop-noop.c -else -RUNLOOP_DEF=-DHAVE_LIBUV=1 -C_SOURCES += =ejs-runloop-libuv.c -endif - -LINUX_OBJECTS=$(C_SOURCES:%.c=%.o.linux) $(CPP_SOURCES:%.cpp=%.o.linux) $(OBJC_SOURCES:%.m=%.o.linux) ejs-log.o.linux ejs-invoke-closure-catch.o.linux - -ALL_OBJECTS=$(LINUX_OBJECTS) - -LINUX_CFLAGS += -I/usr/include/libunwind -I../external-deps/pcre-linux -I../external-deps/double-conversion - -ejs-init.o.linux: ejs-atoms-gen.c - -$(LIBRARY): $(LINUX_OBJECTS) - @echo [ar linux] $@ && /usr/bin/ar rc $@ $(LINUX_OBJECTS) - -OBJC_FLAGS= -ObjC -DOBJC=1 -fobjc-abi-version=2 -fobjc-legacy-dispatch - -%.o.linux: %.c - @mkdir -p .deps - @$(CC) -MM $(LINUX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.linux,,`/$@/ > .deps/$@-deps - @echo [$(CC) linux] $< && $(CC) $(LINUX_CFLAGS) -c -o $@ $< - -%.o.linux: %.cpp - @mkdir -p .deps - @$(CXX) -MM $(LINUX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.linux,,`/$@/ > .deps/$@-deps - @echo [$(CXX) linux] $< && $(CXX) -std=c++11 $(LINUX_CFLAGS) -c -o $@ $< - -%.o.linux: %.m - @mkdir -p .deps - @$(CC) -MM $(LINUX_CFLAGS) $< | sed -e s/`echo $@ | sed -e s,.linux,,`/$@/ > .deps/$@-deps - @echo [$(CC) linux] $< && $(CC) $(LINUX_CFLAGS) $(OBJC_FLAGS) -c -o $@ $< - -%.o.linux: %.ll - @echo [llc linux] $< && llc$(LLVM_SUFFIX) --relocation-model=pic -filetype=obj -o=$@ -O2 $< - --include $(patsubst %.o.linux,.deps/%.o.linux-deps,$(LINUX_OBJECTS)) -endif - -ifeq ($(HOST_OS),darwin) - -OBJC_SOURCES= \ - ejs-jsobjc.m \ - ejs-log.m \ - ejs-objc.m \ - ejs-webgl.m \ - ejs-xhr.m \ - ejs-runloop-darwin.m - -MACOS_CFLAGS += -I../external-deps/pcre-macos -I../external-deps/double-conversion -IOSSIM_CFLAGS += -I../external-deps/pcre-iossim -I../external-deps/double-conversion -IOSDEV_CFLAGS += -I../external-deps/pcre-iosdev -I../external-deps/double-conversion - - -ejs-webgl-constants-sorted.h: ejs-webgl-constants.h - @echo [GEN] $@ && (grep WEBGL_CONSTANT $< | sort > $@) - -DARWIN_OBJC_FLAGS= -ObjC -DOBJC=1 -fobjc-abi-version=2 -fobjc-legacy-dispatch -fno-objc-arc -MACOS_OBJC_FLAGS= $(DARWIN_OBJC_FLAGS) -IOSSIM_OBJC_FLAGS= $(DARWIN_OBJC_FLAGS) -IOSDEV_OBJC_FLAGS= $(DARWIN_OBJC_FLAGS) - -PREFIXES=MACOS IOSSIM IOSDEV - -INCLUDE=-include - -ALL_OBJECTS= - -define PREFIX_rules -$(1)_lowered=$(shell echo $(1) | tr '[:upper:]' '[:lower:]') -$(1)_LIBRARY=out/$($(1)_SHORT_TRIPLE)/$(LIBRARY) -$(1)_OBJECTS=$(C_SOURCES:%.c=out/$($(1)_SHORT_TRIPLE)/%.o) $(CPP_SOURCES:%.cpp=out/$($(1)_SHORT_TRIPLE)/%.o) $(OBJC_SOURCES:%.m=out/$($(1)_SHORT_TRIPLE)/%.o) out/$($(1)_SHORT_TRIPLE)/ejs-invoke-closure-catch.o - -ALL_OBJECTS += $$($(1)_OBJECTS) - -$$($(1)_LIBRARY): $$($(1)_OBJECTS) - @echo [ar $(shell echo $(1) | tr '[:upper:]' '[:lower:]')] `basename $$@` && /usr/bin/ar rc $$@ $$($(1)_OBJECTS) - -out/$($(1)_SHORT_TRIPLE)/%.o: %.ll - @mkdir -p .deps/out/$$($(1)_SHORT_TRIPLE) - @mkdir -p out/$$($(1)_SHORT_TRIPLE) - @echo [llc $$($(1)_lowered)] $$< && llc$$(LLVM_SUFFIX) -march=$($(1)_MARCH) -mtriple=$($(1)_MTRIPLE) -filetype=obj -o=$$@ -O2 $$< - -out/$($(1)_SHORT_TRIPLE)/%.o: %.c - @mkdir -p .deps/out/$($(1)_SHORT_TRIPLE) - @mkdir -p out/$($(1)_SHORT_TRIPLE) - @$(CC) -MM $($(1)_CFLAGS) $$< | sed -e s,`basename $$@`,$$@, > .deps/$$@-deps - @echo [$(CC) $$($(1)_lowered)] $$< && $(CC) -ObjC $($(1)_CFLAGS) -c -o $$@ $$< - -out/$($(1)_SHORT_TRIPLE)/%.o: %.cpp - @mkdir -p .deps/out/$($(1)_SHORT_TRIPLE) - @mkdir -p out/$($(1)_SHORT_TRIPLE) - @$(CXX) -MM $($(1)_CFLAGS) $$< | sed -e s,`basename $$@`,$$@, > .deps/$$@-deps - @echo [$(CXX) $$($(1)_lowered)] $$< && $(CXX) -std=c++11 $($(1)_CFLAGS) -c -o $$@ $$< - -out/$($(1)_SHORT_TRIPLE)/%.o: %.m - @mkdir -p .deps/out/$($(1)_SHORT_TRIPLE) - @mkdir -p out/$($(1)_SHORT_TRIPLE) - $(CC) -MM $($(1)_OBJC_FLAGS) $($(1)_CFLAGS) $$< | sed -e s,`basename $$@`,$$@, > .deps/$$@-deps - @echo [$(CC) $$($(1)_lowered)] $$< && $(CC) $($(1)_OBJC_FLAGS) $($(1)_CFLAGS) -c -o $$@ $$< - -out/$($(1)_SHORT_TRIPLE)/ejs-webgl.o: ejs-webgl-constants-sorted.h - -out/$($(1)_SHORT_TRIPLE)/ejs-init.o: ejs-atoms-gen.c -endef - -$(foreach prefix,$(PREFIXES),$(eval $(call PREFIX_rules,$(prefix)))) - --include $(patsubst out/$(MACOS_SHORT_TRIPLE)/%.o,.deps/out/$(MACOS_SHORT_TRIPLE)/%.o-deps,$(MACOS_OBJECTS)) --include $(patsubst out/$(IOSSIM_SHORT_TRIPLE)/%.o,.deps/out/$(IOSSIM_SHORT_TRIPLE)/%.o-deps,$(IOSSIM_OBJECTS)) --include $(patsubst out/$(IOSDEV_SHORT_TRIPLE)/%.o,.deps/out/$(IOSDEV_SHORT_TRIPLE)/%.o-deps,$(IOSDEV_OBJECTS)) - -ifneq ($(CIRCLE_BUILD_NUM),) -# on circleci we only build the macos library -ALL_LIBRARIES=$(MACOS_LIBRARY) -else -ALL_LIBRARIES=$(MACOS_LIBRARY) $(IOSSIM_LIBRARY) $(IOSDEV_LIBRARY) -endif - -ALL_TARGETS=$(ALL_LIBRARIES) - -analyze_plists = $(C_SOURCES:%.c=out/analysis/%.plist) $(CPP_SOURCES:%.cpp=out/analysis/%.plist) $(OBJC_SOURCES:%.m=out/analysis/%.plist) -analyze:: $(analyze_plists) - -out/analysis/%.plist: %.c - @mkdir -p out/analysis - @echo [$(CC) analyze] $< && $(CC) $(MACOS_CFLAGS) --analyze $< -o $@ - -out/analysis/%.plist: %.cpp - @mkdir -p out/analysis - @echo [$(CXX) analyze] $< && $(CXX) $(MACOS_CFLAGS) --analyze $< -o $@ - -out/analysis/%.plist: %.m - @mkdir -p out/analysis - @echo [$(CC) analyze] $< && $(CC) $(MACOS_CFLAGS) --analyze $< -o $@ -endif - -all-local:: $(ALL_TARGETS) - -#XXX(toshok) same as node-compat's Makefile - we need to install all targets to their respective archlibdirs -install-local:: - @$(MKDIR) $(includedir)/runtime - @$(MKDIR) $(archlibdir) - $(INSTALL) -c $(ALL_LIBRARIES) $(archlibdir) - @for i in *.h; do \ - $(INSTALL) -c $$i $(includedir)/runtime; \ - done - -clean-local:: - rm -f test $(ALL_OBJECTS) $(ALL_LIBRARIES) ejs-atoms-gen.c $(analyze_plists) - -include $(TOP)/mk/build.mk diff --git a/samples/Makefile b/samples/Makefile deleted file mode 100644 index a972e4f6..00000000 --- a/samples/Makefile +++ /dev/null @@ -1,20 +0,0 @@ -TOP=.. - --include $(TOP)/mk/config.mk - -EJS_DRIVER?=$(TOP)/ejs - -SUBDIRS=fetch - -trackmix: trackmix/trackmix.js - @mkdir -p trackmix/TrackMix.app/Contents/MacOS/ - ibtool --compile trackmix/TrackMix.app/Contents/Resources/Base.lproj/MainMenu.nib trackmix/TrackMix.app/Contents/Resources/Base.lproj/MainMenu.xib - $(EJS_DRIVER) -o trackmix/TrackMix.app/Contents/MacOS/trackmix.js.exe -I pirouette=$(TOP)/pirouette/bindings trackmix/trackmix.js - -trackmixcode: trackmixcode/trackmixcode.js - @mkdir -p trackmixcode/TrackMixCode.app/Contents/MacOS/ - $(EJS_DRIVER) -o trackmixcode/TrackMixCode.app/Contents/MacOS/trackmixcode.js.exe -I pirouette=$(TOP)/pirouette/bindings trackmixcode/trackmixcode.js - -all: trackmix trackmixcode - --include $(TOP)/mk/build.mk diff --git a/samples/fetch/Makefile b/samples/fetch/Makefile deleted file mode 100644 index b66ff537..00000000 --- a/samples/fetch/Makefile +++ /dev/null @@ -1,12 +0,0 @@ -TOP=../.. - --include $(TOP)/mk/config.mk - -EJS_DRIVER?=$(TOP)/ejs - -fetch: fetch.js - $(EJS_DRIVER) --srcdir -o $@ $< - -all-local:: fetch - --include $(TOP)/mk/build.mk diff --git a/test/Makefile b/test/Makefile deleted file mode 100644 index 049d1a94..00000000 --- a/test/Makefile +++ /dev/null @@ -1,97 +0,0 @@ -TOP=.. - --include $(TOP)/mk/config.mk - -.SILENT: - -TESTS:=$(wildcard *[0-9].js) -TEST_NAMES:= $(patsubst %.js,%,$(TESTS)) -CHECK_TESTS:= $(patsubst %.js,check-%,$(TESTS)) - -TOPDIR=$(shell pwd)/.. -NPM_PREFIX=$(shell npm prefix -g) -NODE_PATH=$(TOPDIR)/node-llvm/build/Release:$(TOPDIR)/lib/generated:$(NPM_PREFIX)/lib/node_modules -NODE_FLAGS=--harmony --harmony-typeof -TRACEUR_FLAGS=--block-binding true - -MODULE_DIRS=--moduledir $(TOP)/node-compat --moduledir $(TOP)/ejs-llvm - -all-local:: check - -check: check-unit-tests check-stage0 - -check-stage0: - @NODE_PATH=$(NODE_PATH) PATH=$(PATH):$(TOPDIR)/node_modules/.bin node tester.js -s 0 - -check-stage1: - @NODE_PATH=$(NODE_PATH) PATH=$(PATH):$(TOPDIR)/node_modules/.bin node tester.js -s 1 - -check-stage2: - @NODE_PATH=$(NODE_PATH) PATH=$(PATH):$(TOPDIR)/node_modules/.bin node tester.js -s 2 - -check-sim-stage0: - @NODE_PATH=$(NODE_PATH) PATH=$(PATH):$(TOPDIR)/node_modules/.bin node tester.js -p sim -s 0 - -check-sim-stage1: - NODE_PATH=$(NODE_PATH) PATH=$(PATH):$(TOPDIR)/node_modules/.bin node tester.js -p sim -s 1 - -$(CHECK_TESTS): check-%: %.js - @NODE_PATH=$(NODE_PATH) PATH=$(PATH):$(TOPDIR)/node_modules/.bin node tester.js -s 0 -t $< - -check-unit-tests: check-llvm - -build-tests: $(patsubst %.js,%.js.exe,$(TESTS)) - -build-tests-stage1: - @$(MAKE) EJS_DRIVER="$(TOPDIR)/ejs.exe" EJS_STAGE=1 build-tests - -check-llvm: - NODE_PATH=$(NODE_PATH) mocha llvm-test.js - -run-tests: generate-expected prepare-xfail $(patsubst %.js,test-%,$(TESTS)) format-results - -run-tests-stage1: - @$(MAKE) EJS_DRIVER="$(TOPDIR)/ejs.exe" EJS_STAGE=1 run-tests - -$(ESPRIMA_TESTS): %.js.exe: %.js $(TOPDIR)/esprima/esprima-es6.js $(TOPDIR)/escodegen/escodegen-es6.js $(TOPDIR)/estraverse/estraverse-es6.js $(TOPDIR)/runtime/libecho.a - @cp $(TOPDIR)/esprima/esprima-es6.js . - @cp $(TOPDIR)/escodegen/escodegen-es6.js . - @cp $(TOPDIR)/estraverse/estraverse-es6.js . - @echo [ejs stage$(EJS_STAGE)] $< && $(EJS_DRIVER) $(EJS_DRIVER_ARGS) $< - -clean-esprima-roundtrip: - @rm -f esprima-es6.js escodegen-es6.js estraverse-es6.js - -EJS_DRIVER_ARGS ?= --leave-temp -q -EJS_DRIVER ?= NODE_PATH=$(NODE_PATH) $(TOPDIR)/ejs -EJS_STAGE ?= 0 - -%.js.exe: %.js $(TOPDIR)/runtime/libecho.a - @$(EJS_DRIVER) $(EJS_DRIVER_ARGS) --srcdir $(MODULE_DIRS) $< - -v8-%.js.exe: v8/%.js $(TOPDIR)/runtime/libecho.a - NODE_PATH=$(NODE_PATH) $(TOPDIR)/ejs --srcdir $(MODULE_DIRS) $< - -run-node: - NODE_PATH=$(NODE_PATH) node - -node-path: - echo $(NODE_PATH) - -clean-local:: clean-esprima-roundtrip - rm -f *.o *.js.exe .*.diff .*-out .failures .successes .xfail .xsuccess - rm -rf *.dSYM - -.PRECIOUS: $(TESTS:%.js=expected/%.js.expected-out) - - -compare-%: - -@test_js=`echo $@|sed -e s,compare-,,`.js; \ - $(TOPDIR)/ejs.js.exe.stage0 $(EJS_DRIVER_ARGS) $$test_js; \ - mv /tmp/$$test_js.1.ll $$test_js.ll.stage0; \ - $(TOPDIR)/ejs.js.exe.stage1 $(EJS_DRIVER_ARGS) $$test_js; \ - mv /tmp/$$test_js.1.ll $$test_js.ll.stage1; \ - diff -us $$test_js.ll.stage0 $$test_js.ll.stage1; \ - rm $$test_js.ll.stage0 $$test_js.ll.stage1 - --include $(TOP)/mk/build.mk From 689cf977f569a04a893558d2370602a443982820 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 13:21:51 -0700 Subject: [PATCH 016/146] add EIRProposal.md: SSA IR to replace the AST+intrinsics middle-end Co-Authored-By: Claude Fable 5 --- EIRProposal.md | 318 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 318 insertions(+) create mode 100644 EIRProposal.md diff --git a/EIRProposal.md b/EIRProposal.md new file mode 100644 index 00000000..bb764f5e --- /dev/null +++ b/EIRProposal.md @@ -0,0 +1,318 @@ +# EIR: a proposal for an EchoJS intermediate representation + +This proposes replacing the compiler's AST+intrinsics middle-end with a +dedicated SSA IR ("EIR") that sits between the desugaring passes and LLVM +emission. It is motivated by two concrete needs: + +1. giving language-level optimizations a place to live (LLVM only sees + opaque `_ejs_op_*` calls and can't reason about JS semantics), and +2. giving the abstract-interpretation static analysis effort a real + dataflow substrate (CFG + SSA + effect annotations) instead of an AST. + +## Why the current architecture fights us + +Today's pipeline is: + + esprima AST + → ~20 desugaring passes (AST → AST) + → closure conversion (AST → AST + %intrinsic pseudo-calls) + → LLVMIRVisitor (AST → LLVM IR, allocas everywhere) + → llvm-as / opt -O2 / llc + +Three structural problems fall out of this: + +**The middle-end has no vocabulary of its own.** Semantic operations are +encoded as `CallExpression`s with magic callee names (`%moduleGetSlot`, +`%slot`, `%makeClosure`, `%invokeClosure`, `%typeofIsObject`, ...) — +new-cc.js alone has ~50 `intrinsic(...)` construction sites. Passes that +want to reason about these ops have to pattern-match call expressions +(`is_intrinsic(n.object, "%moduleGetExotic")`), and nothing checks that +an intrinsic's arguments are well-formed until LLVMIRVisitor throws (or +worse, silently miscompiles — several of the bugs fixed during the +bootstrap work were of exactly this shape: the for-of/destructuring pass +ordering bug, the module-slot layout bug, the `is32bit` truthiness bug). + +**All dataflow is outsourced to mem2reg.** Every local lives in an +entry-block `alloca` (`createAllocas` comments: "so the mem2reg opt pass +can regenerate the ssa form for us"), and every assignment is a +store/load pair. That's fine as far as LLVM is concerned — clang does +the same — but it means *we* never hold an SSA view of the program. By +the time SSA exists, the program is LLVM IR where `a + b` is an opaque +call to `_ejs_op_add` and a property access is `_ejs_object_getprop`. +LLVM can CSE neither, can't fold `typeof x === "string"` after a guard, +can't sink a boxing operation, can't stack-allocate a closure env that +doesn't escape. Everything that requires knowing JS semantics is +currently optimized by nobody. + +**The AST is a poor substrate for abstract interpretation.** A +fixed-point dataflow analysis wants a CFG with explicit joins, values +with single definitions to attach lattice facts to, and effect summaries +per operation. Deriving all of that on the fly from an AST (with +exitable-scope's implicit control flow, `arguments` aliasing, and +intrinsic-calls-as-expressions) means the analysis re-implements half a +compiler front-end before it can begin. + +So: yes, I think this is the right move. The honest caveat is that +alloca+mem2reg is *not* a performance problem by itself — the win is not +"skip mem2reg", it's everything a real IR unlocks: JS-aware optimization, +a shared substrate with the analysis work, verifiability, and the +deletion of the intrinsics-through-AST encoding. Direct SSA emission is +then a pleasant side effect of already being in SSA. + +## Design + +### Shape + +MLIR/Cranelift-flavored, not LLVM-flavored, in one specific way: **basic +block arguments instead of phi nodes**. Block args are easier to build +directly from an AST, easier to verify, and dramatically nicer for an +abstract interpreter (a join point's values are just the block's +parameters — no "which predecessor am I" bookkeeping). They translate to +LLVM phis mechanically at emission. + + module := function*, module-metadata (imports, exports, slot table) + function := name, params, blocks, env-shape + block := label, block-args, instruction*, terminator + instruction := result? = opcode operand*, attributes + terminator := br / cond_br / switch / return / throw / unreachable + (call-like instructions may also terminate: see EH) + +Values are typed. The type lattice is EchoJS's, not LLVM's: + + any -- a boxed ejsval, contents unknown + ├─ number (⊇ int32) -- still boxed; refinement facts + ├─ string, symbol + ├─ boolean, undefined, null + ├─ object (optionally: object, array, function) + raw types: f64, i32, b1, rawptr, rawptr -- unboxed, post-lowering + +A value of type `number` is still an ejsval at the `any` level of the IR; +the type is a *fact*, not a representation. Representation change is an +explicit instruction (`unbox_f64` / `box_f64`), introduced by lowering. + +### Two tiers, one IR + +Rather than two separate IRs, EIR has high-level and low-level opcodes in +one instruction set, and a lowering pass between them (SpiderMonkey +MIR/LIR and V8's ignition→turbofan pipelines both converged on something +similar; for a two-person project one IR with tiers is much cheaper). + +**High tier** — one opcode per semantic operation the language has. +Everything the ~50 AST intrinsics encode today becomes a first-class, +verifiable instruction: + + %v = add %a, %b ; generic JS +, may throw (valueOf) + %v = get_prop %obj, %key ; may throw, reads heap + set_prop %obj, %key, %v + %v = get_prop_atom %obj, atom(length) + %f = make_closure fn(@inner), %env + %e = make_env 3, parent=%env0 ; env with 3 slots + %v = env_load %e, slot(2) + env_store %e, slot(2), %v + %v = module_slot_load module(lib/consts), slot(46) + module_slot_store module(...), slot(n), %v + %v = call %callee, this=%t, args(%a, %b) + %v = construct %callee, args(...) + %b = to_boolean %v + %b = typeof_is %v, "string" ; pure + %b = strict_eq %a, %b ; pure + %v = const ejsval(atom "Program") ; pure + ... + +Every opcode carries an **effect signature** in a static table: +`{pure | reads-heap | writes-heap} × {may-throw} × {may-gc} × {may-call}`. +This table is the contract the optimizer *and* the abstract interpreter +both consume — it is the single most valuable artifact of the whole +design, and it's about 60 lines. + +**Low tier** — what emission actually wants: tag tests, unboxing, raw +arithmetic, direct runtime calls: + + %t = has_tag %v, double-tag ; pure, b1 + %d = unbox_f64 %v ; pure (requires proven tag) + %r = f64.add %d1, %d2 + %v2 = box_f64 %r + %v = call_runtime _ejs_op_add(%a, %b) ; the fallback the high op lowers to + +The lowering pass maps each high op to either (a) a guarded fast path + +runtime-call slow path, or (b) a plain runtime call — *informed by the +type facts on its operands*. This is the hook where the abstract +interpreter pays rent: it runs on the high tier, refines operand types +(`%a: number`, `%b: number`), and lowering then emits `f64.add` with no +guards instead of `call _ejs_op_add`. Today there is no place in the +pipeline where that transaction can even be expressed. + +### Control flow and exceptions + +All control flow is explicit edges between blocks. `exitable-scope.js`'s +implicit break/continue/return-through-finally machinery disappears into +ordinary CFG construction (finally blocks are duplicated or dispatched at +lowering-from-AST time, exactly once, in one place). + +Exceptions use LLVM's model, because we must emit it anyway: any +`may-throw` instruction inside a protected region becomes a terminator +with two successors: + + %v = invoke get_prop %obj, %key + normal ^bb7(%v), unwind ^catch3(%exc) + +Blocks reached by unwind edges are catch blocks; their block-arg is the +caught value. Emission maps this 1:1 onto invoke/landingpad with the +existing EJS personality. Outside protected regions, may-throw +instructions are plain instructions (unwinding propagates), same as +today. + +### Functions, closures, environments + +Closure conversion moves from an AST pass (new-cc, ~1500 lines of the +subtlest code in the compiler) into the AST→EIR lowering: scope +resolution assigns each binding to a param, an SSA local, or an env slot, +and emits `make_env`/`env_load`/`env_store` directly. Because envs and +slots are first-class instructions with known effects, two optimizations +become straightforward EIR passes later: + +- **env promotion**: a captured-but-never-mutated-after-capture slot's + loads can be forwarded to the stored value; an env whose closure never + escapes can be elided entirely (today every function with any capture + allocates a GC'd env unconditionally); +- **direct calls**: `%f = make_closure fn(@inner), %e` followed by + `call %f` can become a direct call to `@inner` with `%e` passed + explicitly, skipping `_ejs_invoke_closure`'s dispatch. + +The GC contract stays exactly as the runtime now guarantees it: ejsvals +and raw env/object pointers live in SSA values → machine registers/stack +slots, which the conservative scanner already handles (including interior +pointers, as of the recent GC work). No stack maps needed. The one rule +EIR must enforce (verifier-checked): a raw *derived* pointer may not be +live across a `may-gc` instruction unless the base is also live — which +the conservative scanner then makes safe. + +### Textual format + +Every function above implies it: EIR has a canonical textual form, parsed +and printed by the compiler. This is load-bearing, not cosmetic — golden +tests for lowering, a `--emit-eir` flag for debugging, serialization for +the analysis tooling, and reduced repro cases all come from it. + +Example — `function inc(x) { return x + 1; }` after lowering + analysis +proved nothing about `x`: + + fn @inc(%this: any, %x: any) -> any { + ^entry: + %c1 = const number(1) + %r = add %x, %c1 ; may-throw, may-gc + return %r + } + +after the abstract interpreter proves `%x: number` at all call sites: + + fn @inc(%this: any, %x: any but-known number) -> any { + ^entry: + %d = unbox_f64 %x + %r = f64.add %d, 1.0 + %v = box_f64 %r + return %v + } + +### SSA construction + +Build SSA *during* AST→EIR lowering with the Braun/Buchwald/Hack +algorithm ("Simple and Efficient Construction of SSA Form", CC'13): local +value numbering per block + lazy block-arg insertion on demand, no +dominator computation, designed exactly for AST-to-SSA translation, and +small enough to implement in a few hundred lines of the JS we can +self-host. (This matters: the compiler compiles itself, so the IR +implementation must be written in the subset of JS EchoJS handles, and +compile-time performance of the compiler is a user-visible cost.) + +### What the abstract interpreter gets + +- CFG with block args → textbook fixed-point iteration, join = block + entry, no SSA-deconstruction shims; +- one definition per value → lattice facts keyed by value id, stored in a + side table (the IR never mutates for analysis); +- the effect table → sound handling of calls/heap without re-deriving + behavior from op names; +- module metadata (export slots, const-ness — gather-imports already + computes `constval`) → interprocedural constants for free; +- the textual format → corpus capture and regression fixtures. + +The contract between the two efforts is intentionally thin: the analysis +consumes high-tier EIR + the effect table, and produces a side table of +`value-id → lattice fact` (plus optionally `call-site → callee set`). +Lowering consumes that side table. Neither needs the other to exist to +make progress: lowering without facts just always takes the generic +path, which is exactly today's behavior. + +## What EIR replaces, and what it doesn't + +Unchanged: esprima, all the *syntactic* desugaring passes (classes, +destructuring, for-of, generators, arguments, templates...), the runtime, +llc/linking. Desugars are cheap, well-understood, and testable; EIR +should receive a maximally-desugared AST. + +Replaced, eventually: `new-cc.js` (closure conversion → lowering), +`exitable-scope.js` (→ CFG construction), `compiler.js`'s LLVMIRVisitor +(→ a much smaller EIR→LLVM emitter: every EIR value is an LLVM value, +block args are phis, invoke edges are invokes — no allocas except the +few real ones: `arguments` objects, scratch areas). + +## Migration plan + +The bootstrap gives us an unusually strong safety net: 373 tests × 3 +stages, plus the stage2≡stage3 fixed-point check, which catches +miscompiles of the compiler itself. Use it. + +1. **EIR core** (data structures, builder, verifier, printer/parser, + effect table). Pure addition; no behavior change. Landable and + testable standalone — and immediately usable by the analysis work. +2. **AST→EIR lowering + naive EIR→LLVM emission** behind a flag + (`--ir`), initially only for functions using a whitelisted subset of + constructs (fall back to the legacy path per-function otherwise). + Success = test suite green with the flag on, then fixed point holds. +3. **Grow coverage** until the whitelist is "everything"; make `--ir` + the default; keep legacy for one release as `--legacy-codegen`. +4. **Delete** new-cc/exitable-scope/LLVMIRVisitor; the AST intrinsics + vocabulary disappears with them. +5. **Optimize** (now, not before): env promotion, direct calls, + guard-informed lowering fed by the abstract interpreter, redundant + box/unbox elimination, atom-keyed `get_prop_atom` ICs. + +Phases 1–2 are the risky-design part and are deliberately boring in +behavior; phase 5 is where the payoff lives, and it only starts once the +suite + fixed point protect it. + +## Risks, named + +- **Semantics drift.** LLVMIRVisitor encodes years of "oh right, JS + does *that*". Mitigation: per-function fallback during migration, the + test suite, and porting visitor code case-by-case rather than + rewriting from the spec. +- **Compiler self-hosting perf.** An extra IR costs compile time; + Braun-style construction and arena-ish (array-indexed, not + pointer-soup) IR storage keep it linear. Budget: self-compile time + should stay within ~1.3× of today through phase 3, and win it back in + phase 5 (less work for opt: we can likely drop `opt -O2` to `-O1` once + we do our own scalar cleanup). +- **GC interactions.** The conservative collector makes most of this a + non-issue, but the derived-pointer-liveness rule must be in the + verifier from day one, not discovered the way we discovered the + register-scanning hole. +- **Two-team coupling.** The analysis effort should consume EIR at + phase 1; if the effect table or type lattice is wrong for them, we + want that feedback before phase 3 freezes the design. + +## Alternatives considered + +- **Keep the AST, add annotations** (facts keyed by AST node): cheapest, + but joins/loops have no natural representation, intrinsics stay + stringly-typed, and emission stays alloca-shaped. This is the status + quo with more bookkeeping. +- **Emit better LLVM directly** (skip our own IR, build LLVM SSA with + its own phi construction): removes mem2reg reliance but gives the + analysis nothing (LLVM IR has erased JS semantics — `_ejs_op_add` is + just a call), and ties every analysis/optimization to the llvm binding + API. +- **CPS / sea-of-nodes**: more power than we need, much harder to + implement, print, verify, and self-host. Block-arg SSA is the + sweet spot. From ef1a6ad528aec860911d49f80cd45b7982122b46 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 16:05:58 -0700 Subject: [PATCH 017/146] EIR phase 1: IR core, Braun SSA builder, printer, verifier + lowering skeleton implements the first milestone of EIRProposal.md on the eir branch: - lib/eir/ops.js: the opcode set with the effect table (the contract shared by lowering, optimizations, and the abstract interpreter) - lib/eir/ir.js: Module/Func/Block/Inst; SSA with basic-block arguments (no phis); explicit per-edge argument lists on terminators - lib/eir/builder.js: on-the-fly SSA construction (Braun/Buchwald/Hack CC'13) adapted to block args: write/readVariable, block sealing, recursive trivial-parameter removal - lib/eir/printer.js: canonical textual form (deterministic numbering, golden-testable) - lib/eir/verifier.js: seal/terminator/edge-arity checks plus def-dominates-use via Cooper-Harvey-Kennedy dominators - lib/eir/lower.js: phase-2 skeleton AST->EIR lowering for a whitelisted subset (literals, locals, globals, operators, member access, calls, if/while/logical/conditional, return); everything else throws LowerNotSupported for per-function fallback to the legacy path - lib/eir/tests.js + //:test-eir: 12 unit tests covering SSA join/loop parameter insertion and trivial-param removal, lowering shapes, and verifier rejections sample: `function g(n) { let i = 0; while (i < n) i = i + 1; return i; }` lowers to a 4-block CFG whose loop header has exactly one block param for i -- no allocas, no mem2reg. Co-Authored-By: Claude Fable 5 --- BUCK | 9 ++ lib/BUCK | 2 + lib/buck-gen-js.sh | 2 +- lib/eir/builder.js | 187 +++++++++++++++++++++++ lib/eir/ir.js | 167 +++++++++++++++++++++ lib/eir/lower.js | 355 ++++++++++++++++++++++++++++++++++++++++++++ lib/eir/ops.js | 146 ++++++++++++++++++ lib/eir/printer.js | 97 ++++++++++++ lib/eir/tests.js | 267 +++++++++++++++++++++++++++++++++ lib/eir/verifier.js | 176 ++++++++++++++++++++++ 10 files changed, 1407 insertions(+), 1 deletion(-) create mode 100644 lib/eir/builder.js create mode 100644 lib/eir/ir.js create mode 100644 lib/eir/lower.js create mode 100644 lib/eir/ops.js create mode 100644 lib/eir/printer.js create mode 100644 lib/eir/tests.js create mode 100644 lib/eir/verifier.js diff --git a/BUCK b/BUCK index 26173ac8..f938809b 100644 --- a/BUCK +++ b/BUCK @@ -87,6 +87,15 @@ alias( actual = ":ejs.exe.stage1", ) +# EIR unit tests (run under node against the babel'd tree): +# buck2 build //:test-eir +genrule( + name = "test-eir", + out = "test-eir.log", + cmd = '(node "$(location //lib:generated)/lib/eir/tests.js" > $OUT 2>&1) || ' + + "{ cat $OUT >&2; exit 1; }; tail -1 $OUT", +) + # run the test suite against a stage: buck2 build //:test-stage3 # the output artifact is the full test log; the build fails if any test # fails. diff --git a/lib/BUCK b/lib/BUCK index 98b5c22f..5a1807aa 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -19,6 +19,7 @@ filegroup( [ "*.js", "passes/*.js", + "eir/*.js", ], exclude = ["host-config.js"], ), @@ -34,6 +35,7 @@ genrule( [ "*.js", "passes/*.js", + "eir/*.js", ], exclude = ["host-config.js"], ) + [ diff --git a/lib/buck-gen-js.sh b/lib/buck-gen-js.sh index a416f773..abaca79e 100644 --- a/lib/buck-gen-js.sh +++ b/lib/buck-gen-js.sh @@ -28,7 +28,7 @@ run_babel() { cd "$SRCDIR" -for f in *.js passes/*.js; do +for f in *.js passes/*.js eir/*.js; do case "$f" in ejs-es6.js) continue ;; esac diff --git a/lib/eir/builder.js b/lib/eir/builder.js new file mode 100644 index 00000000..e8341932 --- /dev/null +++ b/lib/eir/builder.js @@ -0,0 +1,187 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// EIR function builder with on-the-fly SSA construction. +// +// This implements Braun, Buchwald, Hack et al., "Simple and Efficient +// Construction of Static Single Assignment Form" (CC 2013), adapted to +// basic-block arguments instead of phis: +// +// - writeVariable/readVariable give the AST lowering a mutable-variable +// view; the builder inserts block parameters at join points on demand. +// - blocks start unsealed; sealing a block promises no further +// predecessors will be added, at which point pending ("incomplete") +// parameters get their per-edge arguments filled in. +// - trivial parameters (all incoming arguments equal, or only the +// parameter itself) are removed recursively. + +import { Func, Block, Inst, replaceAllUses, usersOf } from "./ir"; +import { opInfo } from "./ops"; + +export class FunctionBuilder { + constructor(name, paramNames) { + this.fn = new Func(name, paramNames); + // varname -> (block -> value) + this.defs = new Map(); + this.cur = null; + + let entry = this.newBlock("entry"); + this.setInsertPoint(entry); + // function parameters are the entry block's parameters + for (let pname of this.fn.paramNames) { + let p = entry.addParam(pname); + this.writeVariable(pname, entry, p); + } + this.sealBlock(entry); + } + + newBlock(name) { + return this.fn.addBlock(new Block(this.fn, name)); + } + + setInsertPoint(block) { + this.cur = block; + } + + // --- instruction emission ------------------------------------------------ + + emit(op, operands, imms) { + if (this.cur.terminated) throw new Error(`emitting '${op}' into terminated block ${this.cur.name}`); + let inst = new Inst(this.fn, op, operands, imms); + inst.block = this.cur; + this.cur.insts.push(inst); + return inst; + } + + constNumber(v) { + return this.emit("const", [], { kind: "number", value: v }); + } + constAtom(s) { + return this.emit("const", [], { kind: "atom", value: s }); + } + constBool(v) { + return this.emit("const", [], { kind: "boolean", value: v }); + } + constUndefined() { + return this.emit("const", [], { kind: "undefined" }); + } + constNull() { + return this.emit("const", [], { kind: "null" }); + } + + br(block, args) { + let inst = this.emit("br", [], {}); + inst.addTarget(block, args || []); + return inst; + } + + condBr(cond, tblock, targs, fblock, fargs) { + let inst = this.emit("cond_br", [cond], {}); + inst.addTarget(tblock, targs || []); + inst.addTarget(fblock, fargs || []); + return inst; + } + + ret(value) { + return this.emit("return", [value], {}); + } + + // --- Braun SSA ------------------------------------------------------------- + + writeVariable(name, block, value) { + let m = this.defs.get(name); + if (!m) { + m = new Map(); + this.defs.set(name, m); + } + m.set(block, value); + } + + hasVariable(name) { + return this.defs.has(name); + } + + readVariable(name, block) { + let m = this.defs.get(name); + if (m && m.has(block)) return m.get(block); + return this.readVariableRecursive(name, block); + } + + readVariableRecursive(name, block) { + let val; + if (!block.sealed) { + // incomplete CFG: leave a parameter to be filled at seal time + let param = block.addParam(name); + block.incompleteParams.set(name, param); + val = param; + } else if (block.predEdges.length === 1) { + val = this.readVariable(name, block.predEdges[0].inst.block); + } else if (block.predEdges.length === 0) { + throw new Error(`EIR: read of undefined variable '${name}' reached entry`); + } else { + // break potential cycles with a parameter before recursing + let param = block.addParam(name); + this.writeVariable(name, block, param); + val = this.addParamOperands(name, param); + } + this.writeVariable(name, block, val); + return val; + } + + addParamOperands(name, param) { + let block = param.block; + for (let e of block.predEdges) { + let predBlock = e.inst.block; + let v = this.readVariable(name, predBlock); + e.inst.targets[e.targetIndex].args[param.paramIndex] = v; + } + return this.tryRemoveTrivialParam(param); + } + + tryRemoveTrivialParam(param) { + let block = param.block; + let same = null; + for (let e of block.predEdges) { + let arg = e.inst.targets[e.targetIndex].args[param.paramIndex]; + if (arg === same || arg === param) continue; + if (same !== null) return param; // merges at least two distinct values: keep it + same = arg; + } + // unreachable block or self-reference only + if (same === null) return param; + + // collect users before rewriting so we can recheck dependent params + let users = usersOf(this.fn, param).filter((u) => u !== param); + + replaceAllUses(this.fn, param, same); + // fix stale variable definitions that still point at the removed param + for (let m of this.defs.values()) { + for (let entry of m.entries()) { + if (entry[1] === param) m.set(entry[0], same); + } + } + block.removeParam(param); + + for (let u of users) { + if (u.op === "blockparam" && !u.removed) this.tryRemoveTrivialParam(u); + } + return same; + } + + sealBlock(block) { + if (block.sealed) throw new Error(`sealing already-sealed block ${block.name}`); + block.sealed = true; + for (let entry of block.incompleteParams.entries()) { + this.addParamOperands(entry[0], entry[1]); + } + block.incompleteParams.clear(); + } + + finish() { + for (let b of this.fn.blocks) { + if (!b.sealed) throw new Error(`EIR: block ${b.name} never sealed`); + } + return this.fn; + } +} diff --git a/lib/eir/ir.js b/lib/eir/ir.js new file mode 100644 index 00000000..a7d67528 --- /dev/null +++ b/lib/eir/ir.js @@ -0,0 +1,167 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// EIR core data structures: Module / Function / Block / Inst. +// SSA with basic block arguments (no phi nodes); block parameters are +// Insts with op "blockparam". See EIRProposal.md. + +import { opInfo, isTerminator } from "./ops"; + +export class Module { + constructor(name) { + this.name = name; + this.functions = []; + } + + addFunction(fn) { + this.functions.push(fn); + return fn; + } +} + +export class Func { + constructor(name, paramNames) { + this.name = name; + this.paramNames = paramNames || []; + this.blocks = []; + this.next_value_id = 0; + this.next_block_id = 0; + this.entry = null; + } + + newValueId() { + return this.next_value_id++; + } + + addBlock(block) { + this.blocks.push(block); + if (!this.entry) this.entry = block; + return block; + } + + // all instructions, params first per block, in block order. + forEachInst(cb) { + for (let b of this.blocks) { + for (let p of b.params) cb(p, b); + for (let i of b.insts) cb(i, b); + } + } +} + +export class Block { + constructor(fn, name) { + this.fn = fn; + // uniquify within the function so lowering can reuse friendly names + this.name = `${name || "bb"}${fn.next_block_id++}`; + this.params = []; + this.insts = []; + this.sealed = false; + // predecessor edges: { inst: , targetIndex: } + this.predEdges = []; + // Braun SSA construction state (owned by the builder) + this.incompleteParams = new Map(); // varname -> param Inst + } + + get terminator() { + let last = this.insts[this.insts.length - 1]; + if (last && isTerminator(last)) return last; + return null; + } + + get terminated() { + return this.terminator !== null; + } + + preds() { + return this.predEdges.map((e) => e.inst.block); + } + + succs() { + let t = this.terminator; + if (!t || !t.targets) return []; + return t.targets.map((tgt) => tgt.block); + } + + addParam(nameHint) { + let p = new Inst(this.fn, "blockparam", [], {}); + p.block = this; + p.nameHint = nameHint; + p.paramIndex = this.params.length; + this.params.push(p); + // extend every known predecessor edge with a slot for this param. + // callers (the builder) fill the values in. + for (let e of this.predEdges) { + e.inst.targets[e.targetIndex].args.push(null); + } + return p; + } + + removeParam(param) { + let idx = param.paramIndex; + this.params.splice(idx, 1); + for (let i = idx; i < this.params.length; i++) this.params[i].paramIndex = i; + for (let e of this.predEdges) { + e.inst.targets[e.targetIndex].args.splice(idx, 1); + } + param.removed = true; + } +} + +export class Inst { + // operands: array of Inst (values); imms: object of immediates + constructor(fn, op, operands, imms) { + this.id = fn.newValueId(); + this.op = op; + this.operands = operands || []; + this.imms = imms || {}; + this.block = null; + this.type = "any"; + // control-flow targets for terminators / invokes: + // [{ block, args: [Inst], kind: "normal"|"unwind"|undefined }] + this.targets = null; + + let info = opInfo(op); + if (info.arity >= 0 && this.operands.length !== info.arity) + throw new Error( + `EIR: '${op}' expects ${info.arity} operands, got ${this.operands.length}` + ); + } + + addTarget(block, args, kind) { + if (!this.targets) this.targets = []; + let targetIndex = this.targets.length; + this.targets.push({ block: block, args: args || [], kind: kind }); + block.predEdges.push({ inst: this, targetIndex: targetIndex }); + } +} + +// replace every use of `from` (as an operand or edge argument) in fn with `to`. +export function replaceAllUses(fn, from, to) { + fn.forEachInst((inst) => { + for (let i = 0; i < inst.operands.length; i++) { + if (inst.operands[i] === from) inst.operands[i] = to; + } + if (inst.targets) { + for (let t of inst.targets) { + for (let i = 0; i < t.args.length; i++) { + if (t.args[i] === from) t.args[i] = to; + } + } + } + }); +} + +// collect the instructions that use `value` (operands or edge args). +export function usersOf(fn, value) { + let users = []; + fn.forEachInst((inst) => { + let uses = false; + for (let o of inst.operands) if (o === value) uses = true; + if (inst.targets) { + for (let t of inst.targets) for (let a of t.args) if (a === value) uses = true; + } + if (uses) users.push(inst); + }); + return users; +} diff --git a/lib/eir/lower.js b/lib/eir/lower.js new file mode 100644 index 00000000..565341a0 --- /dev/null +++ b/lib/eir/lower.js @@ -0,0 +1,355 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// AST -> EIR lowering, phase-2 skeleton. +// +// This intentionally covers only a whitelisted subset of the (desugared) +// AST; anything else throws LowerNotSupported so callers can fall back to +// the legacy LLVMIRVisitor per-function. The subset grows until nothing +// falls back; see EIRProposal.md's migration plan. +// +// Handled today: literals, identifiers (params + lexical locals + global +// reads), let/var declarations, assignment (=), binary/logical/unary +// operators, member access, calls, if/else, while, return, blocks, +// expression statements. +// +// Deliberately NOT handled yet: closures/captured variables (env slots), +// try/catch (unwind edges), for-in, switch, module slots, `arguments`, +// construct, and everything else. + +import * as b from "../ast-builder"; +import { FunctionBuilder } from "./builder"; +import { Module } from "./ir"; + +export class LowerNotSupported extends Error { + constructor(what, loc) { + let locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; + super(`EIR lowering does not support ${what}${locstr}`); + this.what = what; + } +} + +const binops = { + "+": "add", + "-": "sub", + "*": "mul", + "/": "div", + "%": "mod", + "<": "lt", + "<=": "le", + ">": "gt", + ">=": "ge", + "==": "loose_eq", + "!=": "loose_neq", + "===": "strict_eq", + "!==": "strict_neq", + "&": "bitand", + "|": "bitor", + "^": "bitxor", + "<<": "shl", + ">>": "shr", + ">>>": "ushr", + instanceof: "instanceof", + in: "in", +}; + +export class LowerFunction { + constructor(name, paramNames) { + this.b = new FunctionBuilder(name, ["%this"].concat(paramNames)); + this.locals = new Set(paramNames); + } + + // --- expressions ---------------------------------------------------------- + + expr(n) { + switch (n.type) { + case b.Literal: + return this.literal(n); + case b.Identifier: + return this.identifier(n); + case b.BinaryExpression: + return this.binary(n); + case b.LogicalExpression: + return this.logical(n); + case b.UnaryExpression: + return this.unary(n); + case b.AssignmentExpression: + return this.assignment(n); + case b.CallExpression: + return this.call(n); + case b.MemberExpression: + return this.member(n); + case b.ConditionalExpression: + return this.conditional(n); + default: + throw new LowerNotSupported(`expression type ${n.type}`, n.loc); + } + } + + literal(n) { + if (n.value === null) return this.b.constNull(); + switch (typeof n.value) { + case "number": + return this.b.constNumber(n.value); + case "string": + return this.b.constAtom(n.value); + case "boolean": + return this.b.constBool(n.value); + default: + throw new LowerNotSupported(`literal ${typeof n.value}`, n.loc); + } + } + + identifier(n) { + if (n.name === "undefined") return this.b.constUndefined(); + if (this.locals.has(n.name)) return this.b.readVariable(n.name, this.b.cur); + // not a local: a global reference + return this.b.emit("get_global", [], { atom: n.name }); + } + + binary(n) { + let op = binops[n.operator]; + if (!op) throw new LowerNotSupported(`binary operator ${n.operator}`, n.loc); + let l = this.expr(n.left); + let r = this.expr(n.right); + return this.b.emit(op, [l, r], {}); + } + + logical(n) { + // a && b / a || b: short-circuit via control flow; the joined value + // is a block parameter. + let l = this.expr(n.left); + let lbool = this.b.emit("to_boolean", [l], {}); + + let rhs_bb = this.b.newBlock("logical_rhs"); + let join_bb = this.b.newBlock("logical_join"); + let result = join_bb.addParam("logical"); + + if (n.operator === "&&") this.b.condBr(lbool, rhs_bb, [], join_bb, [l]); + else if (n.operator === "||") this.b.condBr(lbool, join_bb, [l], rhs_bb, []); + else throw new LowerNotSupported(`logical operator ${n.operator}`, n.loc); + this.b.sealBlock(rhs_bb); + + this.b.setInsertPoint(rhs_bb); + let r = this.expr(n.right); + this.b.br(join_bb, [r]); + this.b.sealBlock(join_bb); + + this.b.setInsertPoint(join_bb); + return result; + } + + unary(n) { + let arg; + switch (n.operator) { + case "!": + arg = this.expr(n.argument); + return this.b.emit("logical_not", [arg], {}); + case "-": + arg = this.expr(n.argument); + return this.b.emit("neg", [arg], {}); + case "+": + arg = this.expr(n.argument); + return this.b.emit("unary_plus", [arg], {}); + case "~": + arg = this.expr(n.argument); + return this.b.emit("bitnot", [arg], {}); + case "typeof": + arg = this.expr(n.argument); + return this.b.emit("typeof", [arg], {}); + default: + throw new LowerNotSupported(`unary operator ${n.operator}`, n.loc); + } + } + + assignment(n) { + if (n.operator !== "=") + throw new LowerNotSupported(`assignment operator ${n.operator}`, n.loc); + if (n.left.type === b.Identifier) { + if (!this.locals.has(n.left.name)) + throw new LowerNotSupported(`assignment to non-local ${n.left.name}`, n.loc); + let v = this.expr(n.right); + this.b.writeVariable(n.left.name, this.b.cur, v); + return v; + } + if (n.left.type === b.MemberExpression) { + let obj = this.expr(n.left.object); + let v; + if (!n.left.computed && n.left.property.type === b.Identifier) { + v = this.expr(n.right); + this.b.emit("set_prop_atom", [obj, v], { atom: n.left.property.name }); + } else { + let key = this.expr(n.left.property); + v = this.expr(n.right); + this.b.emit("set_prop", [obj, key, v], {}); + } + return v; + } + throw new LowerNotSupported(`assignment target ${n.left.type}`, n.loc); + } + + member(n) { + let obj = this.expr(n.object); + if (!n.computed && n.property.type === b.Identifier) + return this.b.emit("get_prop_atom", [obj], { atom: n.property.name }); + let key = this.expr(n.property); + return this.b.emit("get_prop", [obj, key], {}); + } + + call(n) { + let callee, thisArg; + if (n.callee.type === b.MemberExpression) { + // method call: `this` is the receiver + thisArg = this.expr(n.callee.object); + if (!n.callee.computed && n.callee.property.type === b.Identifier) + callee = this.b.emit("get_prop_atom", [thisArg], { + atom: n.callee.property.name, + }); + else { + let key = this.expr(n.callee.property); + callee = this.b.emit("get_prop", [thisArg, key], {}); + } + } else { + callee = this.expr(n.callee); + thisArg = this.b.constUndefined(); + } + let args = n.arguments.map((a) => this.expr(a)); + return this.b.emit("call", [callee, thisArg].concat(args), {}); + } + + conditional(n) { + let cond = this.expr(n.test); + let cbool = this.b.emit("to_boolean", [cond], {}); + + let then_bb = this.b.newBlock("cond_then"); + let else_bb = this.b.newBlock("cond_else"); + let join_bb = this.b.newBlock("cond_join"); + let result = join_bb.addParam("cond"); + + this.b.condBr(cbool, then_bb, [], else_bb, []); + this.b.sealBlock(then_bb); + this.b.sealBlock(else_bb); + + this.b.setInsertPoint(then_bb); + let tv = this.expr(n.consequent); + this.b.br(join_bb, [tv]); + + this.b.setInsertPoint(else_bb); + let ev = this.expr(n.alternate); + this.b.br(join_bb, [ev]); + this.b.sealBlock(join_bb); + + this.b.setInsertPoint(join_bb); + return result; + } + + // --- statements --------------------------------------------------------------- + + stmt(n) { + switch (n.type) { + case b.BlockStatement: + for (let s of n.body) { + this.stmt(s); + if (this.b.cur.terminated) return; + } + return; + case b.VariableDeclaration: + for (let d of n.declarations) { + if (d.id.type !== b.Identifier) + throw new LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); + let init = d.init ? this.expr(d.init) : this.b.constUndefined(); + this.locals.add(d.id.name); + this.b.writeVariable(d.id.name, this.b.cur, init); + } + return; + case b.ExpressionStatement: + this.expr(n.expression); + return; + case b.IfStatement: + return this.ifStmt(n); + case b.WhileStatement: + return this.whileStmt(n); + case b.ReturnStatement: + this.b.ret(n.argument ? this.expr(n.argument) : this.b.constUndefined()); + return; + case b.EmptyStatement: + return; + default: + throw new LowerNotSupported(`statement type ${n.type}`, n.loc); + } + } + + ifStmt(n) { + let cond = this.expr(n.test); + let cbool = this.b.emit("to_boolean", [cond], {}); + + let then_bb = this.b.newBlock("if_then"); + let else_bb = n.alternate ? this.b.newBlock("if_else") : null; + let join_bb = this.b.newBlock("if_join"); + + this.b.condBr(cbool, then_bb, [], else_bb || join_bb, []); + this.b.sealBlock(then_bb); + if (else_bb) this.b.sealBlock(else_bb); + + this.b.setInsertPoint(then_bb); + this.stmt(n.consequent); + if (!this.b.cur.terminated) this.b.br(join_bb, []); + + if (else_bb) { + this.b.setInsertPoint(else_bb); + this.stmt(n.alternate); + if (!this.b.cur.terminated) this.b.br(join_bb, []); + } + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + } + + whileStmt(n) { + let header = this.b.newBlock("while_header"); + let body = this.b.newBlock("while_body"); + let exit = this.b.newBlock("while_exit"); + + this.b.br(header, []); + // header is NOT sealed yet: the back edge is still coming + + this.b.setInsertPoint(header); + let cond = this.expr(n.test); + let cbool = this.b.emit("to_boolean", [cond], {}); + this.b.condBr(cbool, body, [], exit, []); + this.b.sealBlock(body); + + this.b.setInsertPoint(body); + this.stmt(n.body); + if (!this.b.cur.terminated) this.b.br(header, []); + this.b.sealBlock(header); + this.b.sealBlock(exit); + + this.b.setInsertPoint(exit); + } + + finish() { + if (!this.b.cur.terminated) this.b.ret(this.b.constUndefined()); + return this.b.finish(); + } +} + +// lower a FunctionDeclaration/FunctionExpression AST node (no captures) +export function lowerFunctionNode(n, name) { + let paramNames = n.params.map((p) => { + if (p.type !== b.Identifier) throw new LowerNotSupported(`param pattern ${p.type}`, n.loc); + return p.name; + }); + let lf = new LowerFunction(name || (n.id && n.id.name) || "anon", paramNames); + lf.stmt(n.body); + return lf.finish(); +} + +// lower every top-level function declaration in a parsed program +export function lowerProgram(ast, moduleName) { + let mod = new Module(moduleName || "module"); + for (let s of ast.body) { + if (s.type === b.FunctionDeclaration) mod.addFunction(lowerFunctionNode(s)); + } + return mod; +} diff --git a/lib/eir/ops.js b/lib/eir/ops.js new file mode 100644 index 00000000..db9c0db5 --- /dev/null +++ b/lib/eir/ops.js @@ -0,0 +1,146 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// The EIR opcode set and its effect table. See EIRProposal.md. +// +// The effect table is the contract between lowering, the optimizer, and +// the abstract interpreter: every instruction's behavior with respect to +// the heap, exceptions, GC, and calls is declared here, not rediscovered +// by pattern matching. + +export const Effect = { + NONE: 0, + READ: 1 << 0, // reads the JS heap + WRITE: 1 << 1, // writes the JS heap + THROW: 1 << 2, // may throw + GC: 1 << 3, // may allocate / trigger a collection + CALL: 1 << 4, // may reenter arbitrary JS +}; + +const E = Effect; + +// effects shorthand for the generic operators: valueOf/toString hooks mean +// they can call back into JS, which implies read/write/throw/gc. +const GENERIC_OP = E.READ | E.WRITE | E.THROW | E.GC | E.CALL; + +// arity: fixed operand count, or -1 for variadic. +// imms: names of immediate (non-value) attributes the instruction carries. +// terminator: ends a block; targets carry per-edge block-argument lists. +export const OPS = { + // --- constants ------------------------------------------------------- + // imms.kind: "number" | "atom" | "boolean" | "undefined" | "null" + // imms.value: the constant payload (unused for undefined/null) + const: { arity: 0, effects: E.NONE, imms: ["kind", "value"] }, + + // --- generic (high tier) operators ------------------------------------ + add: { arity: 2, effects: GENERIC_OP }, + sub: { arity: 2, effects: GENERIC_OP }, + mul: { arity: 2, effects: GENERIC_OP }, + div: { arity: 2, effects: GENERIC_OP }, + mod: { arity: 2, effects: GENERIC_OP }, + lt: { arity: 2, effects: GENERIC_OP }, + le: { arity: 2, effects: GENERIC_OP }, + gt: { arity: 2, effects: GENERIC_OP }, + ge: { arity: 2, effects: GENERIC_OP }, + loose_eq: { arity: 2, effects: GENERIC_OP }, + loose_neq: { arity: 2, effects: GENERIC_OP }, + bitand: { arity: 2, effects: GENERIC_OP }, + bitor: { arity: 2, effects: GENERIC_OP }, + bitxor: { arity: 2, effects: GENERIC_OP }, + shl: { arity: 2, effects: GENERIC_OP }, + shr: { arity: 2, effects: GENERIC_OP }, + ushr: { arity: 2, effects: GENERIC_OP }, + instanceof: { arity: 2, effects: GENERIC_OP }, + in: { arity: 2, effects: GENERIC_OP }, + neg: { arity: 1, effects: GENERIC_OP }, + unary_plus: { arity: 1, effects: GENERIC_OP }, + bitnot: { arity: 1, effects: GENERIC_OP }, + + // pure predicates / conversions + strict_eq: { arity: 2, effects: E.NONE }, + strict_neq: { arity: 2, effects: E.NONE }, + // to_boolean is pure in ejs (no valueOf involvement) + to_boolean: { arity: 1, effects: E.NONE }, + typeof: { arity: 1, effects: E.GC }, + typeof_is: { arity: 1, effects: E.NONE, imms: ["type"] }, + logical_not: { arity: 1, effects: E.NONE }, + + // --- properties -------------------------------------------------------- + get_prop: { arity: 2, effects: GENERIC_OP }, + set_prop: { arity: 3, effects: GENERIC_OP }, + get_prop_atom: { arity: 1, effects: GENERIC_OP, imms: ["atom"] }, + set_prop_atom: { arity: 2, effects: GENERIC_OP, imms: ["atom"] }, + delete_prop: { arity: 2, effects: GENERIC_OP }, + + // --- globals ------------------------------------------------------------ + get_global: { arity: 0, effects: E.READ | E.THROW | E.GC, imms: ["atom"] }, + set_global: { arity: 1, effects: E.WRITE | E.THROW | E.GC, imms: ["atom"] }, + + // --- closures / environments ------------------------------------------- + // make_env: operand 0 (optional, variadic 0..1) is the parent env + make_env: { arity: -1, effects: E.GC, imms: ["size"] }, + env_load: { arity: 1, effects: E.READ, imms: ["slot"] }, + env_store: { arity: 2, effects: E.WRITE, imms: ["slot"] }, + make_closure: { arity: 1, effects: E.GC, imms: ["fn"] }, + + // --- modules ------------------------------------------------------------- + module_slot_load: { arity: 0, effects: E.READ, imms: ["module", "slot"] }, + module_slot_store: { arity: 1, effects: E.WRITE, imms: ["module", "slot"] }, + module_get_exotic: { arity: 0, effects: E.READ | E.GC, imms: ["module"] }, + + // --- calls ---------------------------------------------------------------- + // call: operands = [callee, this, ...args] + // construct: operands = [callee, ...args] + // either may carry targets [normal, unwind] when inside a protected + // region, in which case it terminates its block. + call: { arity: -1, effects: GENERIC_OP, may_terminate: true }, + construct: { arity: -1, effects: GENERIC_OP, may_terminate: true }, + + // --- allocation ------------------------------------------------------------ + make_array: { arity: -1, effects: E.GC | E.WRITE }, + // imms.keys: array of atom names, one per operand + make_object: { arity: -1, effects: E.GC | E.WRITE, imms: ["keys"] }, + + // --- low tier --------------------------------------------------------------- + has_tag: { arity: 1, effects: E.NONE, imms: ["tag"] }, + unbox_f64: { arity: 1, effects: E.NONE }, + box_f64: { arity: 1, effects: E.GC }, + f64_add: { arity: 2, effects: E.NONE }, + f64_sub: { arity: 2, effects: E.NONE }, + f64_mul: { arity: 2, effects: E.NONE }, + f64_div: { arity: 2, effects: E.NONE }, + f64_lt: { arity: 2, effects: E.NONE }, + call_runtime: { arity: -1, effects: GENERIC_OP, imms: ["name"] }, + + // --- control flow -------------------------------------------------------------- + br: { arity: 0, effects: E.NONE, terminator: true }, + cond_br: { arity: 1, effects: E.NONE, terminator: true }, + return: { arity: 1, effects: E.NONE, terminator: true }, + throw: { arity: 1, effects: E.THROW, terminator: true }, + unreachable: { arity: 0, effects: E.NONE, terminator: true }, + + // block parameter (not written by user code; created by the builder) + blockparam: { arity: 0, effects: E.NONE }, +}; + +export function opInfo(op) { + let info = OPS[op]; + if (!info) throw new Error(`unknown EIR opcode '${op}'`); + return info; +} + +export function isTerminator(inst) { + let info = opInfo(inst.op); + if (info.terminator) return true; + if (info.may_terminate && inst.targets && inst.targets.length > 0) return true; + return false; +} + +export function mayThrow(op) { + return (opInfo(op).effects & Effect.THROW) !== 0; +} + +export function isPure(op) { + return opInfo(op).effects === Effect.NONE && !opInfo(op).terminator; +} diff --git a/lib/eir/printer.js b/lib/eir/printer.js new file mode 100644 index 00000000..816f1683 --- /dev/null +++ b/lib/eir/printer.js @@ -0,0 +1,97 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// canonical textual form of EIR. deterministic (values numbered densely in +// print order) so it can back golden tests. + +import { opInfo, isTerminator } from "./ops"; + +function fmtImm(v) { + if (typeof v === "string") return JSON.stringify(v); + if (Array.isArray(v)) return `[${v.map(fmtImm).join(", ")}]`; + return String(v); +} + +export function printFunction(fn) { + // dense renumbering in block/instruction order for stable output + let names = new Map(); + let next = 0; + let nameOf = (v) => { + if (v === null || v === undefined) return ""; + if (!names.has(v)) names.set(v, `%${next++}`); + return names.get(v); + }; + + for (let b of fn.blocks) { + for (let p of b.params) nameOf(p); + for (let i of b.insts) nameOf(i); + } + + let lines = []; + let header_params = fn.entry ? fn.entry.params.map((p) => `${nameOf(p)}: ${p.type}`) : []; + lines.push(`fn @${fn.name}(${header_params.join(", ")}) {`); + + for (let b of fn.blocks) { + let plist = ""; + if (b !== fn.entry && b.params.length > 0) + plist = `(${b.params.map((p) => `${nameOf(p)}: ${p.type}`).join(", ")})`; + else if (b !== fn.entry) plist = "()"; + if (b === fn.entry) lines.push(`^${b.name}:`); + else lines.push(`^${b.name}${plist}:`); + + for (let inst of b.insts) { + lines.push(` ${printInst(inst, nameOf)}`); + } + } + lines.push("}"); + return lines.join("\n"); +} + +function printTarget(t, nameOf) { + let args = t.args.map((a) => nameOf(a)).join(", "); + let kind = t.kind ? `${t.kind} ` : ""; + return `${kind}^${t.block.name}(${args})`; +} + +export function printInst(inst, nameOf) { + let info = opInfo(inst.op); + let parts = []; + + let producesValue = !info.terminator || false; + // terminators don't produce values; invoke-style calls do + if (inst.op === "br" || inst.op === "cond_br" || inst.op === "return" || + inst.op === "throw" || inst.op === "unreachable") + producesValue = false; + else producesValue = true; + + let rhs = [inst.op]; + + let operand_strs = inst.operands.map((o) => nameOf(o)); + let imm_strs = []; + if (info.imms) { + for (let imm of info.imms) { + if (inst.imms[imm] !== undefined) imm_strs.push(`${imm}=${fmtImm(inst.imms[imm])}`); + } + } + + let all = operand_strs.concat(imm_strs); + let text = inst.op + (all.length ? " " + all.join(", ") : ""); + + if (inst.targets && inst.targets.length > 0) { + text += " -> " + inst.targets.map((t) => printTarget(t, nameOf)).join(", "); + } + + if (producesValue) return `${nameOf(inst)} = ${text}`; + return text; +} + +export function printModule(mod) { + let out = [`module ${mod.name} {`]; + for (let fn of mod.functions) { + out.push(printFunction(fn)); + out.push(""); + } + out.push("}"); + return out.join("\n"); +} diff --git a/lib/eir/tests.js b/lib/eir/tests.js new file mode 100644 index 00000000..8abd29a3 --- /dev/null +++ b/lib/eir/tests.js @@ -0,0 +1,267 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// EIR unit tests. run (via the babel'd tree) with: +// node lib/generated/lib/eir/tests.js +// or through buck: +// buck2 build //:test-eir + +import { FunctionBuilder } from "./builder"; +import { printFunction, printModule } from "./printer"; +import { verifyFunction } from "./verifier"; +import { lowerFunctionNode, lowerProgram, LowerNotSupported } from "./lower"; +import { Func, Block, Inst } from "./ir"; +import * as esprima from "../../external-deps/esprima/esprima-es6"; + +let failures = 0; +let current = ""; + +function test(name, fn) { + current = name; + try { + fn(); + console.log(`pass: ${name}`); + } catch (e) { + failures++; + console.log(`FAIL: ${name}: ${e.message}`); + if (e.stack) console.log(e.stack.split("\n").slice(1, 4).join("\n")); + } +} + +function assert(cond, msg) { + if (!cond) throw new Error(`assertion failed: ${msg || ""}`); +} + +function assertContains(haystack, needle) { + if (haystack.indexOf(needle) === -1) + throw new Error(`expected output to contain '${needle}'\n---\n${haystack}\n---`); +} + +function findBlock(fn, prefix) { + for (let b of fn.blocks) if (b.name.indexOf(prefix) === 0) return b; + throw new Error(`no block named ${prefix}* in @${fn.name}`); +} + +function parseFn(src) { + let ast = esprima.parse(src, { loc: true, raw: true }); + for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; + throw new Error("no function declaration in source"); +} + +// --- builder ------------------------------------------------------------------ + +test("builder: diamond join inserts a block param", () => { + let fb = new FunctionBuilder("diamond", ["c"]); + + let then_bb = fb.newBlock("then"); + let else_bb = fb.newBlock("else"); + let join_bb = fb.newBlock("join"); + + let cond = fb.readVariable("c", fb.cur); + fb.condBr(cond, then_bb, [], else_bb, []); + fb.sealBlock(then_bb); + fb.sealBlock(else_bb); + + fb.setInsertPoint(then_bb); + fb.writeVariable("x", then_bb, fb.constNumber(1)); + fb.br(join_bb, []); + + fb.setInsertPoint(else_bb); + fb.writeVariable("x", else_bb, fb.constNumber(2)); + fb.br(join_bb, []); + fb.sealBlock(join_bb); + + fb.setInsertPoint(join_bb); + let x = fb.readVariable("x", join_bb); + fb.ret(x); + + let fn = fb.finish(); + verifyFunction(fn); + + assert(x.op === "blockparam", "join read should be a block param"); + let join = findBlock(fn, "join"); + assert(join.params.length === 1, "join should have exactly one param"); + + let printed = printFunction(fn); + assertContains(printed, "const kind=\"number\", value=1"); + assertContains(printed, "const kind=\"number\", value=2"); +}); + +test("builder: same value in both arms leaves no param", () => { + let fb = new FunctionBuilder("nodifference", ["c"]); + + let v = fb.constNumber(42); + fb.writeVariable("x", fb.cur, v); + + let then_bb = fb.newBlock("then"); + let else_bb = fb.newBlock("else"); + let join_bb = fb.newBlock("join"); + + fb.condBr(fb.readVariable("c", fb.cur), then_bb, [], else_bb, []); + fb.sealBlock(then_bb); + fb.sealBlock(else_bb); + + fb.setInsertPoint(then_bb); + fb.br(join_bb, []); + fb.setInsertPoint(else_bb); + fb.br(join_bb, []); + fb.sealBlock(join_bb); + + fb.setInsertPoint(join_bb); + let x = fb.readVariable("x", join_bb); + fb.ret(x); + + let fn = fb.finish(); + verifyFunction(fn); + assert(x === v, "read through the join should see the original value"); + assert(findBlock(fn, "join").params.length === 0, "no params expected at join"); +}); + +// --- lowering ----------------------------------------------------------------- + +test("lower: loop-invariant variable gets no header param", () => { + let fn = lowerFunctionNode(parseFn("function f(c) { let a = 5; while (c) { } return a; }")); + verifyFunction(fn); + let header = findBlock(fn, "while_header"); + assert(header.params.length === 0, `header params = ${header.params.length}`); +}); + +test("lower: loop counter gets exactly one header param", () => { + let fn = lowerFunctionNode( + parseFn("function g(n) { let i = 0; while (i < n) { i = i + 1; } return i; }") + ); + verifyFunction(fn); + let header = findBlock(fn, "while_header"); + assert(header.params.length === 1, `header params = ${header.params.length}`); + let printed = printFunction(fn); + assertContains(printed, "lt"); + assertContains(printed, "add"); +}); + +test("lower: if/else assigns and joins", () => { + let fn = lowerFunctionNode( + parseFn("function h(c) { let x = 0; if (c) { x = 1; } else { x = 2; } return x; }") + ); + verifyFunction(fn); + let join = findBlock(fn, "if_join"); + assert(join.params.length === 1, `join params = ${join.params.length}`); +}); + +test("lower: logical && short-circuits through a join param", () => { + let fn = lowerFunctionNode(parseFn("function a(x, y) { return x && y; }")); + verifyFunction(fn); + let printed = printFunction(fn); + assertContains(printed, "logical_join"); + assertContains(printed, "cond_br"); +}); + +test("lower: method calls and property access", () => { + let fn = lowerFunctionNode( + parseFn("function m(o) { o.count = o.count + 1; return o.get(o.count, 3); }") + ); + verifyFunction(fn); + let printed = printFunction(fn); + assertContains(printed, 'get_prop_atom'); + assertContains(printed, 'atom="count"'); + assertContains(printed, 'set_prop_atom'); + assertContains(printed, 'atom="get"'); + assertContains(printed, "call"); +}); + +test("lower: globals resolve to get_global", () => { + let fn = lowerFunctionNode(parseFn("function p(x) { return console.log(x); }")); + verifyFunction(fn); + assertContains(printFunction(fn), 'get_global atom="console"'); +}); + +test("lower: unsupported constructs raise LowerNotSupported", () => { + let threw = false; + try { + lowerFunctionNode(parseFn("function t(x) { try { x(); } catch (e) { } }")); + } catch (e) { + threw = e instanceof LowerNotSupported; + } + assert(threw, "expected LowerNotSupported"); +}); + +test("lower: program with several functions", () => { + let ast = esprima.parse( + "function one() { return 1; } function two() { return one() + 1; }", + { loc: true, raw: true } + ); + let mod = lowerProgram(ast, "twofns"); + assert(mod.functions.length === 2, "two functions"); + let printed = printModule(mod); + assertContains(printed, "fn @one"); + assertContains(printed, "fn @two"); +}); + +// --- verifier ------------------------------------------------------------------ + +test("verifier: rejects use that is not dominated by its def", () => { + let fn = new Func("bad", []); + let entry = fn.addBlock(new Block(fn, "entry")); + let a_bb = fn.addBlock(new Block(fn, "a")); + let b_bb = fn.addBlock(new Block(fn, "b")); + entry.sealed = a_bb.sealed = b_bb.sealed = true; + fn.entry = entry; + + let cond = new Inst(fn, "const", [], { kind: "boolean", value: true }); + cond.block = entry; + entry.insts.push(cond); + let cbr = new Inst(fn, "cond_br", [cond], {}); + cbr.block = entry; + entry.insts.push(cbr); + cbr.addTarget(a_bb, []); + cbr.addTarget(b_bb, []); + + let c1 = new Inst(fn, "const", [], { kind: "number", value: 1 }); + c1.block = a_bb; + a_bb.insts.push(c1); + let ra = new Inst(fn, "return", [c1], {}); + ra.block = a_bb; + a_bb.insts.push(ra); + + // b uses a's value: invalid + let bad = new Inst(fn, "add", [c1, c1], {}); + bad.block = b_bb; + b_bb.insts.push(bad); + let rb = new Inst(fn, "return", [bad], {}); + rb.block = b_bb; + b_bb.insts.push(rb); + + let threw = false; + try { + verifyFunction(fn); + } catch (e) { + threw = /does not dominate/.test(e.message); + } + assert(threw, "expected a dominance violation"); +}); + +test("verifier: rejects unterminated blocks", () => { + let fn = new Func("noterm", []); + let entry = fn.addBlock(new Block(fn, "entry")); + entry.sealed = true; + let c = new Inst(fn, "const", [], { kind: "number", value: 1 }); + c.block = entry; + entry.insts.push(c); + + let threw = false; + try { + verifyFunction(fn); + } catch (e) { + threw = /no terminator/.test(e.message); + } + assert(threw, "expected a no-terminator error"); +}); + +// -------------------------------------------------------------------------------- + +if (failures > 0) { + console.log(`${failures} test(s) FAILED`); + process.exit(1); +} else { + console.log("all EIR tests passed"); +} diff --git a/lib/eir/verifier.js b/lib/eir/verifier.js new file mode 100644 index 00000000..d74f4160 --- /dev/null +++ b/lib/eir/verifier.js @@ -0,0 +1,176 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// EIR structural verifier. checks: +// - every opcode exists and respects its arity +// - every block is sealed and ends in exactly one terminator +// - branch edge argument counts match the target's parameter counts +// - every operand's definition dominates its use (standard iterative +// dominance computation over the CFG) +// +// verify() throws on the first violation; the error message names the +// function, block, and instruction involved. + +import { opInfo, isTerminator } from "./ops"; +import { printInst } from "./printer"; + +function computeRPO(fn) { + let visited = new Set(); + let postorder = []; + // iterative dfs to keep the verifier usable on deep CFGs + let stack = [{ block: fn.entry, succIndex: 0 }]; + visited.add(fn.entry); + while (stack.length > 0) { + let frame = stack[stack.length - 1]; + let succs = frame.block.succs(); + if (frame.succIndex < succs.length) { + let s = succs[frame.succIndex++]; + if (!visited.has(s)) { + visited.add(s); + stack.push({ block: s, succIndex: 0 }); + } + } else { + postorder.push(frame.block); + stack.pop(); + } + } + return { rpo: postorder.slice().reverse(), reachable: visited }; +} + +// Cooper/Harvey/Kennedy "A Simple, Fast Dominance Algorithm" +function computeDominators(fn, rpo) { + let index = new Map(); + rpo.forEach((b, i) => index.set(b, i)); + + let idom = new Map(); + idom.set(fn.entry, fn.entry); + + let intersect = (a, b) => { + while (a !== b) { + while (index.get(a) > index.get(b)) a = idom.get(a); + while (index.get(b) > index.get(a)) b = idom.get(b); + } + return a; + }; + + let changed = true; + while (changed) { + changed = false; + for (let b of rpo) { + if (b === fn.entry) continue; + let newIdom = null; + for (let p of b.preds()) { + if (!index.has(p)) continue; // unreachable pred + if (!idom.has(p)) continue; + newIdom = newIdom === null ? p : intersect(p, newIdom); + } + if (newIdom !== null && idom.get(b) !== newIdom) { + idom.set(b, newIdom); + changed = true; + } + } + } + return idom; +} + +function dominates(idom, a, b) { + // does block a dominate block b? + let runner = b; + while (true) { + if (runner === a) return true; + let next = idom.get(runner); + if (next === undefined || next === runner) return runner === a; + runner = next; + } +} + +export function verifyFunction(fn) { + let fail = (msg, inst) => { + let where = inst ? ` at '${printInst(inst, (v) => `%v${v.id}`)}'` : ""; + throw new Error(`EIR verifier: fn @${fn.name}: ${msg}${where}`); + }; + + if (!fn.entry) fail("no entry block"); + + let { rpo, reachable } = computeRPO(fn); + let idom = computeDominators(fn, rpo); + + // per-block structural checks + for (let b of fn.blocks) { + if (!b.sealed) fail(`block ^${b.name} is not sealed`); + if (!reachable.has(b)) continue; // ignore unreachable blocks beyond seal check + + let term = null; + for (let i = 0; i < b.insts.length; i++) { + let inst = b.insts[i]; + let info = opInfo(inst.op); // throws on unknown op + if (info.arity >= 0 && inst.operands.length !== info.arity) + fail(`'${inst.op}' has ${inst.operands.length} operands, wants ${info.arity}`, inst); + if (isTerminator(inst)) { + if (i !== b.insts.length - 1) + fail(`terminator in the middle of ^${b.name}`, inst); + term = inst; + } + if (inst.op === "blockparam") fail("blockparam in instruction stream", inst); + } + if (!term) fail(`block ^${b.name} has no terminator`); + + // edge argument counts match target params + if (term.targets) { + for (let t of term.targets) { + if (t.args.length !== t.block.params.length) + fail( + `edge to ^${t.block.name} passes ${t.args.length} args, target has ${t.block.params.length} params`, + term + ); + for (let a of t.args) + if (a === null || a === undefined) + fail(`edge to ^${t.block.name} has an unfilled argument`, term); + } + } + } + + // def-dominates-use. a value used as an operand must be defined in a + // block that dominates the use block (params count as defined at block + // entry; straight-line order enforced within a block). + let instIndex = new Map(); + for (let b of fn.blocks) { + b.insts.forEach((inst, i) => instIndex.set(inst, i)); + } + + let checkUse = (val, userBlock, userIdx, inst) => { + if (val.removed) fail("use of removed block parameter", inst); + let defBlock = val.block; + if (!reachable.has(defBlock)) fail("operand defined in unreachable block", inst); + if (defBlock === userBlock) { + if (val.op === "blockparam") return; // defined at entry of the block + let defIdx = instIndex.get(val); + if (defIdx === undefined || defIdx >= userIdx) + fail(`operand %v${val.id} used before definition`, inst); + } else { + if (!dominates(idom, defBlock, userBlock)) + fail( + `operand %v${val.id} (def in ^${defBlock.name}) does not dominate use in ^${userBlock.name}`, + inst + ); + } + }; + + for (let b of fn.blocks) { + if (!reachable.has(b)) continue; + b.insts.forEach((inst, i) => { + for (let o of inst.operands) checkUse(o, b, i, inst); + if (inst.targets) { + for (let t of inst.targets) for (let a of t.args) checkUse(a, b, i, inst); + } + }); + } + + return true; +} + +export function verifyModule(mod) { + for (let fn of mod.functions) verifyFunction(fn); + return true; +} From a4cd215bc551a4cf0f6fdb993377f1d1c429d373 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 16:20:56 -0700 Subject: [PATCH 018/146] EIR: scope analysis, closures/environments, try/catch, loop control flow replaces new-cc for the EIR path with a fresh, self-contained scope analysis (lib/eir/scopes.js): every binding gets a unique id (shadowing never aliases SSA variables), references resolve through a side map, and captured bindings get env slots in their declaring function, with parent slots reserved only where a descendant actually reaches past a function. lowering (lib/eir/lower.js) now emits make_env/env_load/env_store/ make_closure directly, using the runtime calling convention (%env, %this, ...params): captured params are stored to the env at entry, function declarations are hoisted as closures, and outer-scope access follows parent slots -- skipping env-less intermediate functions entirely (their incoming env is forwarded to their children's closures). try/catch lowers to invoke-style instructions: inside a protected region any may-throw instruction terminates its block with explicit normal/unwind edges; catch blocks carry the caught exception as a special first parameter that unwind edges don't supply. a nice property falls out of Braun SSA + block args: a variable read in the catch block gets per-throw-site values joined through catch block params, one per unwind edge. also: for/do-while/break/continue/new/this/array/object literals, and eager lowering of child functions so hoisted-but-unreached declarations still get bodies. //:test-eir grows to 25 tests, all green. EIRProposal.md gains a section on block-argument-driven specialization (basic block versioning): analysis at block granularity with types supplied through block arguments, versions cloned per argument-type tuple. Co-Authored-By: Claude Fable 5 --- EIRProposal.md | 20 +++ lib/eir/builder.js | 53 ++++++- lib/eir/errors.js | 14 ++ lib/eir/ir.js | 19 ++- lib/eir/lower.js | 347 ++++++++++++++++++++++++++++++++++++++------ lib/eir/ops.js | 4 +- lib/eir/scopes.js | 317 ++++++++++++++++++++++++++++++++++++++++ lib/eir/tests.js | 234 ++++++++++++++++++++++++----- lib/eir/verifier.js | 17 ++- 9 files changed, 930 insertions(+), 95 deletions(-) create mode 100644 lib/eir/errors.js create mode 100644 lib/eir/scopes.js diff --git a/EIRProposal.md b/EIRProposal.md index bb764f5e..0bd0da40 100644 --- a/EIRProposal.md +++ b/EIRProposal.md @@ -214,6 +214,26 @@ after the abstract interpreter proves `%x: number` at all call sites: return %v } +### Block-argument-driven specialization (basic block versioning) + +Block arguments make one further strategy available that phi-form SSA +makes awkward: **specializing blocks on the types of their arguments**. +A block is a small function of its parameters; if analysis (or profiling) +shows a block is entered with `(number, string)` on one edge and +`(any, any)` on another, the lowering can *version* the block — clone it +per distinct argument-type tuple, wiring each predecessor edge to the +version matching the types it can prove it passes. Inside a version, +the parameter types are facts, so guards disappear and unboxing floats +to the block entry. This is Chevalier-Boisvert & Feeley's basic block +versioning (ECOOP'15), which gets most of the benefit of interprocedural +type inference at a fraction of the implementation cost, and it consumes +exactly the interface EIR already has: types attached to block +parameters, edges that pass arguments. The static analysis can treat a +block as its unit of work — a lattice tuple in through the parameters, +facts out through the terminator's edges — and versioning is then a +lowering decision, not an analysis one. (A version cap per block, ~4 in +the literature, bounds code growth.) + ### SSA construction Build SSA *during* AST→EIR lowering with the Braun/Buchwald/Hack diff --git a/lib/eir/builder.js b/lib/eir/builder.js index e8341932..2ee24216 100644 --- a/lib/eir/builder.js +++ b/lib/eir/builder.js @@ -17,7 +17,7 @@ // parameter itself) are removed recursively. import { Func, Block, Inst, replaceAllUses, usersOf } from "./ir"; -import { opInfo } from "./ops"; +import { opInfo, Effect } from "./ops"; export class FunctionBuilder { constructor(name, paramNames) { @@ -25,6 +25,9 @@ export class FunctionBuilder { // varname -> (block -> value) this.defs = new Map(); this.cur = null; + // stack of catch blocks; when non-empty, may-throw instructions get + // explicit normal/unwind edges (invoke style) + this.handlers = []; let entry = this.newBlock("entry"); this.setInsertPoint(entry); @@ -51,6 +54,47 @@ export class FunctionBuilder { let inst = new Inst(this.fn, op, operands, imms); inst.block = this.cur; this.cur.insts.push(inst); + + // inside a protected region, a may-throw instruction terminates its + // block with an explicit normal/unwind pair, and insertion continues + // in the normal successor. + let info = opInfo(op); + if (this.handlers.length > 0 && (info.effects & Effect.THROW) !== 0 && !info.terminator) { + let handler = this.handlers[this.handlers.length - 1]; + let cont = this.newBlock("cont"); + inst.addTarget(cont, [], "normal"); + inst.addTarget(handler, [], "unwind"); + this.sealBlock(cont); + this.setInsertPoint(cont); + } + return inst; + } + + // --- exception handling ----------------------------------------------------- + + newCatchBlock(name) { + let block = this.newBlock(name || "catch"); + block.isCatch = true; + let exc = block.addParam("%exception"); + exc.isException = true; + exc.type = "exception"; + return block; + } + + pushHandler(catchBlock) { + this.handlers.push(catchBlock); + } + + popHandler() { + return this.handlers.pop(); + } + + // a `throw` statement: unwinds to the active handler if there is one, + // otherwise out of the function. + throwValue(v) { + let inst = this.emit("throw", [v], {}); + if (this.handlers.length > 0) + inst.addTarget(this.handlers[this.handlers.length - 1], [], "unwind"); return inst; } @@ -131,19 +175,22 @@ export class FunctionBuilder { addParamOperands(name, param) { let block = param.block; + let argIdx = block.argIndexOfParam(param); for (let e of block.predEdges) { let predBlock = e.inst.block; let v = this.readVariable(name, predBlock); - e.inst.targets[e.targetIndex].args[param.paramIndex] = v; + e.inst.targets[e.targetIndex].args[argIdx] = v; } return this.tryRemoveTrivialParam(param); } tryRemoveTrivialParam(param) { + if (param.isException) return param; // produced by unwinding, never trivial let block = param.block; + let argIdx = block.argIndexOfParam(param); let same = null; for (let e of block.predEdges) { - let arg = e.inst.targets[e.targetIndex].args[param.paramIndex]; + let arg = e.inst.targets[e.targetIndex].args[argIdx]; if (arg === same || arg === param) continue; if (same !== null) return param; // merges at least two distinct values: keep it same = arg; diff --git a/lib/eir/errors.js b/lib/eir/errors.js new file mode 100644 index 00000000..416ae634 --- /dev/null +++ b/lib/eir/errors.js @@ -0,0 +1,14 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// thrown by scope analysis / lowering when a construct is outside the +// currently-supported subset; callers catch it and fall back to the legacy +// code path for that function. +export class LowerNotSupported extends Error { + constructor(what, loc) { + let locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; + super(`EIR lowering does not support ${what}${locstr}`); + this.what = what; + } +} diff --git a/lib/eir/ir.js b/lib/eir/ir.js index a7d67528..e544048a 100644 --- a/lib/eir/ir.js +++ b/lib/eir/ir.js @@ -57,12 +57,22 @@ export class Block { this.params = []; this.insts = []; this.sealed = false; + // catch blocks are reached only by unwind edges; their first param + // is the caught exception, produced by the unwind machinery rather + // than passed as an edge argument. + this.isCatch = false; // predecessor edges: { inst: , targetIndex: } this.predEdges = []; // Braun SSA construction state (owned by the builder) this.incompleteParams = new Map(); // varname -> param Inst } + // edge args don't carry the exception param, so a param's position in + // an edge's args differs from its position in `params` on catch blocks. + argIndexOfParam(param) { + return param.paramIndex - (this.isCatch ? 1 : 0); + } + get terminator() { let last = this.insts[this.insts.length - 1]; if (last && isTerminator(last)) return last; @@ -91,18 +101,21 @@ export class Block { this.params.push(p); // extend every known predecessor edge with a slot for this param. // callers (the builder) fill the values in. - for (let e of this.predEdges) { - e.inst.targets[e.targetIndex].args.push(null); + if (!p.isException) { + for (let e of this.predEdges) { + e.inst.targets[e.targetIndex].args.push(null); + } } return p; } removeParam(param) { let idx = param.paramIndex; + let argIdx = this.argIndexOfParam(param); this.params.splice(idx, 1); for (let i = idx; i < this.params.length; i++) this.params[i].paramIndex = i; for (let e of this.predEdges) { - e.inst.targets[e.targetIndex].args.splice(idx, 1); + e.inst.targets[e.targetIndex].args.splice(argIdx, 1); } param.removed = true; } diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 565341a0..ae00034c 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -2,33 +2,36 @@ * vim: set ts=4 sw=4 et tw=99 ft=js: */ -// AST -> EIR lowering, phase-2 skeleton. +// AST -> EIR lowering. // -// This intentionally covers only a whitelisted subset of the (desugared) -// AST; anything else throws LowerNotSupported so callers can fall back to -// the legacy LLVMIRVisitor per-function. The subset grows until nothing -// falls back; see EIRProposal.md's migration plan. +// Covers a whitelisted subset of the (desugared) AST; anything else throws +// LowerNotSupported so callers can fall back to the legacy LLVMIRVisitor +// per-function. The subset grows until nothing falls back. // -// Handled today: literals, identifiers (params + lexical locals + global -// reads), let/var declarations, assignment (=), binary/logical/unary -// operators, member access, calls, if/else, while, return, blocks, -// expression statements. +// Scope resolution (lib/eir/scopes.js) runs first and decides, per binding: +// SSA local vs. environment slot. Lowering then emits make_env / +// env_load / env_store / make_closure directly — this replaces new-cc for +// the EIR path. // -// Deliberately NOT handled yet: closures/captured variables (env slots), -// try/catch (unwind edges), for-in, switch, module slots, `arguments`, -// construct, and everything else. +// Calling convention mirrors the runtime: every function takes +// (%env, %this, ...params). +// +// Handled: literals, identifiers (locals/captured/globals), var/let/const, +// assignment (=), binary/logical/unary operators, member access, calls, +// new, this, sequence/array/object literals, function declarations and +// expressions (full closure support), if/else, while, do-while, for, +// break/continue, return, throw, try/catch (unwind edges). +// +// Not yet: for-in, switch, `arguments`, update/compound assignment, +// try/finally (desugar it first), labeled break/continue, getters/setters. import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; import { Module } from "./ir"; +import { ScopeAnalysis } from "./scopes"; +import { LowerNotSupported } from "./errors"; -export class LowerNotSupported extends Error { - constructor(what, loc) { - let locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; - super(`EIR lowering does not support ${what}${locstr}`); - this.what = what; - } -} +export { LowerNotSupported }; const binops = { "+": "add", @@ -54,10 +57,94 @@ const binops = { in: "in", }; -export class LowerFunction { - constructor(name, paramNames) { - this.b = new FunctionBuilder(name, ["%this"].concat(paramNames)); - this.locals = new Set(paramNames); +class LowerFunction { + constructor(info, analysis, module) { + this.info = info; // FnInfo from scope analysis + this.analysis = analysis; + this.module = module; + + let paramNames = info.params.map((p) => p.uid); + this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); + this.envParam = this.b.fn.entry.params[0]; + this.thisParam = this.b.fn.entry.params[1]; + + // loop stack for break/continue: { breakTarget, continueTarget } + this.loops = []; + + // environment setup + this.curEnv = this.envParam; + if (info.envSize > 0) { + this.curEnv = this.b.emit("make_env", [], { size: info.envSize }); + if (info.parentSlot >= 0) + this.b.emit("env_store", [this.curEnv, this.envParam], { + slot: info.parentSlot, + }); + // captured parameters live in the env from function entry + for (let p of info.params) { + if (p.captured) { + let v = this.b.readVariable(p.uid, this.b.cur); + this.b.emit("env_store", [this.curEnv, v], { slot: p.slot }); + } + } + } + + // hoist function declarations: their closures exist from entry + for (let binding of info.bindings) { + if (binding.kind === "fn") { + let childInfo = this.findChildFn(binding); + let closure = this.b.emit("make_closure", [this.curEnv], { + fn: childInfo.name, + }); + this.writeBinding(binding, closure); + } + } + } + + findChildFn(binding) { + for (let c of this.info.children) { + if (c.node.id && c.node.id.name === binding.name) return c; + } + throw new Error(`EIR lowering: no child function for binding ${binding.name}`); + } + + // --- binding access ----------------------------------------------------------- + + // the environment holding `binding`, from this function's point of view + envForBinding(binding) { + if (binding.fnInfo === this.info) return this.curEnv; + // start from our incoming env (the environment current in our parent + // when our closure was made) and follow parent slots upward + let env = this.envParam; + let a = this.nearestEnvAncestor(this.info); + while (a && a !== binding.fnInfo) { + if (a.parentSlot < 0) + throw new Error(`EIR lowering: broken env chain through ${a.name}`); + env = this.b.emit("env_load", [env], { slot: a.parentSlot }); + a = this.nearestEnvAncestor(a); + } + if (!a) throw new Error(`EIR lowering: env chain missed ${binding.uid}`); + return env; + } + + nearestEnvAncestor(f) { + let p = f.parent; + while (p && p.envSize === 0) p = p.parent; + return p; + } + + readBinding(binding) { + if (!binding.captured) return this.b.readVariable(binding.uid, this.b.cur); + let env = this.envForBinding(binding); + return this.b.emit("env_load", [env], { slot: binding.slot }); + } + + writeBinding(binding, value) { + if (!binding.captured) { + this.b.writeVariable(binding.uid, this.b.cur, value); + return; + } + let env = this.envForBinding(binding); + this.b.emit("env_store", [env, value], { slot: binding.slot }); } // --- expressions ---------------------------------------------------------- @@ -68,6 +155,8 @@ export class LowerFunction { return this.literal(n); case b.Identifier: return this.identifier(n); + case b.ThisExpression: + return this.thisParam; case b.BinaryExpression: return this.binary(n); case b.LogicalExpression: @@ -78,10 +167,36 @@ export class LowerFunction { return this.assignment(n); case b.CallExpression: return this.call(n); + case b.NewExpression: + return this.newExpr(n); case b.MemberExpression: return this.member(n); case b.ConditionalExpression: return this.conditional(n); + case b.FunctionExpression: + return this.functionExpr(n); + case b.SequenceExpression: { + let v; + for (let e of n.expressions) v = this.expr(e); + return v; + } + case b.ArrayExpression: { + let elems = n.elements.map((e) => + e ? this.expr(e) : this.b.constUndefined() + ); + return this.b.emit("make_array", elems, {}); + } + case b.ObjectExpression: { + let keys = []; + let values = []; + for (let p of n.properties) { + if (p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal)) + throw new LowerNotSupported("computed object key", n.loc); + keys.push(p.key.type === b.Identifier ? p.key.name : String(p.key.value)); + values.push(this.expr(p.value)); + } + return this.b.emit("make_object", values, { keys: keys }); + } default: throw new LowerNotSupported(`expression type ${n.type}`, n.loc); } @@ -103,9 +218,17 @@ export class LowerFunction { identifier(n) { if (n.name === "undefined") return this.b.constUndefined(); - if (this.locals.has(n.name)) return this.b.readVariable(n.name, this.b.cur); - // not a local: a global reference - return this.b.emit("get_global", [], { atom: n.name }); + let binding = this.analysis.resolve(n); + if (binding === null || binding === undefined) + return this.b.emit("get_global", [], { atom: n.name }); + return this.readBinding(binding); + } + + functionExpr(n) { + let childInfo = this.analysis.infoFor(n); + if (!childInfo) throw new Error("EIR lowering: unanalyzed function expression"); + lowerOneFunction(childInfo, this.analysis, this.module); + return this.b.emit("make_closure", [this.curEnv], { fn: childInfo.name }); } binary(n) { @@ -117,8 +240,6 @@ export class LowerFunction { } logical(n) { - // a && b / a || b: short-circuit via control flow; the joined value - // is a block parameter. let l = this.expr(n.left); let lbool = this.b.emit("to_boolean", [l], {}); @@ -167,10 +288,11 @@ export class LowerFunction { if (n.operator !== "=") throw new LowerNotSupported(`assignment operator ${n.operator}`, n.loc); if (n.left.type === b.Identifier) { - if (!this.locals.has(n.left.name)) - throw new LowerNotSupported(`assignment to non-local ${n.left.name}`, n.loc); + let binding = this.analysis.resolve(n.left); let v = this.expr(n.right); - this.b.writeVariable(n.left.name, this.b.cur, v); + if (binding === null || binding === undefined) + this.b.emit("set_global", [v], { atom: n.left.name }); + else this.writeBinding(binding, v); return v; } if (n.left.type === b.MemberExpression) { @@ -200,7 +322,6 @@ export class LowerFunction { call(n) { let callee, thisArg; if (n.callee.type === b.MemberExpression) { - // method call: `this` is the receiver thisArg = this.expr(n.callee.object); if (!n.callee.computed && n.callee.property.type === b.Identifier) callee = this.b.emit("get_prop_atom", [thisArg], { @@ -218,6 +339,12 @@ export class LowerFunction { return this.b.emit("call", [callee, thisArg].concat(args), {}); } + newExpr(n) { + let callee = this.expr(n.callee); + let args = n.arguments.map((a) => this.expr(a)); + return this.b.emit("construct", [callee].concat(args), {}); + } + conditional(n) { let cond = this.expr(n.test); let cbool = this.b.emit("to_boolean", [cond], {}); @@ -259,10 +386,14 @@ export class LowerFunction { if (d.id.type !== b.Identifier) throw new LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); let init = d.init ? this.expr(d.init) : this.b.constUndefined(); - this.locals.add(d.id.name); - this.b.writeVariable(d.id.name, this.b.cur, init); + let binding = this.analysis.resolve(d.id); + this.writeBinding(binding, init); } return; + case b.FunctionDeclaration: + // closure was created (hoisted) at entry; lower the body now + lowerOneFunction(this.analysis.infoFor(n), this.analysis, this.module); + return; case b.ExpressionStatement: this.expr(n.expression); return; @@ -270,9 +401,30 @@ export class LowerFunction { return this.ifStmt(n); case b.WhileStatement: return this.whileStmt(n); + case b.DoWhileStatement: + return this.doWhileStmt(n); + case b.ForStatement: + return this.forStmt(n); case b.ReturnStatement: this.b.ret(n.argument ? this.expr(n.argument) : this.b.constUndefined()); return; + case b.ThrowStatement: + this.b.throwValue(this.expr(n.argument)); + return; + case b.TryStatement: + return this.tryStmt(n); + case b.BreakStatement: { + if (n.label || this.loops.length === 0) + throw new LowerNotSupported("break outside plain loop", n.loc); + this.b.br(this.loops[this.loops.length - 1].breakTarget, []); + return; + } + case b.ContinueStatement: { + if (n.label || this.loops.length === 0) + throw new LowerNotSupported("continue outside plain loop", n.loc); + this.b.br(this.loops[this.loops.length - 1].continueTarget, []); + return; + } case b.EmptyStatement: return; default: @@ -311,7 +463,6 @@ export class LowerFunction { let exit = this.b.newBlock("while_exit"); this.b.br(header, []); - // header is NOT sealed yet: the back edge is still coming this.b.setInsertPoint(header); let cond = this.expr(n.test); @@ -319,37 +470,141 @@ export class LowerFunction { this.b.condBr(cbool, body, [], exit, []); this.b.sealBlock(body); + this.loops.push({ breakTarget: exit, continueTarget: header }); this.b.setInsertPoint(body); this.stmt(n.body); if (!this.b.cur.terminated) this.b.br(header, []); + this.loops.pop(); + this.b.sealBlock(header); this.b.sealBlock(exit); + this.b.setInsertPoint(exit); + } + + doWhileStmt(n) { + let body = this.b.newBlock("do_body"); + let cond_bb = this.b.newBlock("do_cond"); + let exit = this.b.newBlock("do_exit"); + + this.b.br(body, []); + + this.loops.push({ breakTarget: exit, continueTarget: cond_bb }); + this.b.setInsertPoint(body); + this.stmt(n.body); + if (!this.b.cur.terminated) this.b.br(cond_bb, []); + this.loops.pop(); + this.b.sealBlock(cond_bb); + + this.b.setInsertPoint(cond_bb); + let cond = this.expr(n.test); + let cbool = this.b.emit("to_boolean", [cond], {}); + this.b.condBr(cbool, body, [], exit, []); + this.b.sealBlock(body); + this.b.sealBlock(exit); + this.b.setInsertPoint(exit); + } + + forStmt(n) { + if (n.init) { + if (n.init.type === b.VariableDeclaration) this.stmt(n.init); + else this.expr(n.init); + } + + let header = this.b.newBlock("for_header"); + let body = this.b.newBlock("for_body"); + let update = this.b.newBlock("for_update"); + let exit = this.b.newBlock("for_exit"); + + this.b.br(header, []); + + this.b.setInsertPoint(header); + if (n.test) { + let cond = this.expr(n.test); + let cbool = this.b.emit("to_boolean", [cond], {}); + this.b.condBr(cbool, body, [], exit, []); + } else { + this.b.br(body, []); + } + this.b.sealBlock(body); + + this.loops.push({ breakTarget: exit, continueTarget: update }); + this.b.setInsertPoint(body); + this.stmt(n.body); + if (!this.b.cur.terminated) this.b.br(update, []); + this.loops.pop(); + this.b.sealBlock(update); + this.b.setInsertPoint(update); + if (n.update) this.expr(n.update); + this.b.br(header, []); + this.b.sealBlock(header); + this.b.sealBlock(exit); this.b.setInsertPoint(exit); } + tryStmt(n) { + let handler = n.handlers[0]; + let catch_bb = this.b.newCatchBlock("catch"); + let join_bb = this.b.newBlock("try_join"); + + this.b.pushHandler(catch_bb); + this.stmt(n.block); + this.b.popHandler(); + if (!this.b.cur.terminated) this.b.br(join_bb, []); + this.b.sealBlock(catch_bb); + + this.b.setInsertPoint(catch_bb); + if (handler.param) { + let binding = this.analysis.resolve(handler.param); + this.writeBinding(binding, catch_bb.params[0]); + } + this.stmt(handler.body); + if (!this.b.cur.terminated) this.b.br(join_bb, []); + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + } + finish() { if (!this.b.cur.terminated) this.b.ret(this.b.constUndefined()); return this.b.finish(); } } -// lower a FunctionDeclaration/FunctionExpression AST node (no captures) +// lower one analyzed function (and, transitively, function declarations / +// expressions inside it) into `module`. +function lowerOneFunction(info, analysis, module) { + if (info.lowered) return info.fn; + info.lowered = true; + let lf = new LowerFunction(info, analysis, module); + lf.stmt(info.node.body); + info.fn = lf.finish(); + module.addFunction(info.fn); + // hoisted closures may reference children whose declaration statement + // was never reached (e.g. behind an early return); every child still + // needs a body in the module. + for (let child of info.children) lowerOneFunction(child, analysis, module); + return info.fn; +} + +// lower a FunctionDeclaration/FunctionExpression AST node into a fresh +// module; returns { module, fn } export function lowerFunctionNode(n, name) { - let paramNames = n.params.map((p) => { - if (p.type !== b.Identifier) throw new LowerNotSupported(`param pattern ${p.type}`, n.loc); - return p.name; - }); - let lf = new LowerFunction(name || (n.id && n.id.name) || "anon", paramNames); - lf.stmt(n.body); - return lf.finish(); + let analysis = new ScopeAnalysis(); + let info = analysis.analyzeFunction(n, name); + let module = new Module(info.name); + let fn = lowerOneFunction(info, analysis, module); + return { module: module, fn: fn }; } // lower every top-level function declaration in a parsed program export function lowerProgram(ast, moduleName) { - let mod = new Module(moduleName || "module"); + let module = new Module(moduleName || "module"); for (let s of ast.body) { - if (s.type === b.FunctionDeclaration) mod.addFunction(lowerFunctionNode(s)); + if (s.type === b.FunctionDeclaration) { + let analysis = new ScopeAnalysis(); + let info = analysis.analyzeFunction(s); + lowerOneFunction(info, analysis, module); + } } - return mod; + return module; } diff --git a/lib/eir/ops.js b/lib/eir/ops.js index db9c0db5..2756ce90 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -133,7 +133,9 @@ export function opInfo(op) { export function isTerminator(inst) { let info = opInfo(inst.op); if (info.terminator) return true; - if (info.may_terminate && inst.targets && inst.targets.length > 0) return true; + // any may-throw instruction with explicit control-flow targets (a + // normal/unwind pair inside a protected region) terminates its block + if (inst.targets && inst.targets.length > 0) return true; return false; } diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js new file mode 100644 index 00000000..60bb834d --- /dev/null +++ b/lib/eir/scopes.js @@ -0,0 +1,317 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// Scope analysis for EIR lowering. A fresh, self-contained replacement for +// the parts of new-cc's Scope/Binding machinery that lowering needs: +// +// - every binding (param, var/let/const, function decl, catch param) gets +// a unique id, so shadowing never aliases SSA variables; +// - every Identifier reference is resolved to its binding (or to null, +// meaning "global") in a side map keyed by AST node; +// - a binding referenced from a function nested below its declaration is +// marked captured and assigned an environment slot in the declaring +// function; functions learn their env size and whether their env must +// carry a parent-env pointer in slot 0. +// +// The walker deliberately covers the same whitelisted AST subset as +// lower.js and throws LowerNotSupported on anything else, so a function +// either lowers completely or falls back to the legacy path as a unit. + +import * as b from "../ast-builder"; +import { LowerNotSupported } from "./errors"; + +let binding_id_gen = 0; + +export class Binding { + constructor(name, kind, fnInfo) { + this.name = name; + this.uid = `${name}#${binding_id_gen++}`; + this.kind = kind; // "param" | "local" | "fn" | "catch" + this.fnInfo = fnInfo; // declaring FnInfo + this.captured = false; + this.slot = -1; // env slot, if captured + } +} + +export class FnInfo { + constructor(node, name, parent) { + this.node = node; + this.name = name; + this.parent = parent; // FnInfo or null + this.children = []; + this.params = []; // Binding[] + this.bindings = []; // every Binding declared here + this.needsParentEnv = false; // some descendant reaches past this fn + this.envSize = 0; // slots (incl. parent slot), 0 = no env + this.parentSlot = -1; // slot holding the parent env, or -1 + if (parent) parent.children.push(this); + } +} + +class LexScope { + constructor(parent, fnInfo) { + this.parent = parent; + this.fnInfo = fnInfo; + this.names = new Map(); // name -> Binding + } + + declare(name, kind) { + // redeclaration in the same lexical scope reuses the binding (var x; + // var x; — and function-level var hoisting lands them in one scope) + if (this.names.has(name)) return this.names.get(name); + let binding = new Binding(name, kind, this.fnInfo); + this.names.set(name, binding); + this.fnInfo.bindings.push(binding); + return binding; + } + + lookup(name) { + let s = this; + while (s) { + if (s.names.has(name)) return s.names.get(name); + s = s.parent; + } + return null; + } +} + +export class ScopeAnalysis { + constructor() { + this.refs = new Map(); // Identifier node -> Binding | null (global) + this.fnInfos = new Map(); // Function node -> FnInfo + this.curScope = null; + this.curFn = null; + } + + resolve(node) { + return this.refs.get(node); + } + + infoFor(fnNode) { + return this.fnInfos.get(fnNode); + } + + // --- entry point --------------------------------------------------------- + + analyzeFunction(fnNode, name) { + let info = this.enterFunction(fnNode, name); + this.walkStmt(fnNode.body); + this.leaveFunction(); + assignSlots(info); + return info; + } + + enterFunction(fnNode, name) { + let fname = name || (fnNode.id && fnNode.id.name) || "anon"; + let info = new FnInfo(fnNode, fname, this.curFn); + this.fnInfos.set(fnNode, info); + + this.curFn = info; + this.curScope = new LexScope(this.curScope, info); + for (let p of fnNode.params) { + if (p.type !== b.Identifier) + throw new LowerNotSupported(`param pattern ${p.type}`, fnNode.loc); + let binding = this.curScope.declare(p.name, "param"); + info.params.push(binding); + } + return info; + } + + leaveFunction() { + this.curScope = this.curScope.parent; + this.curFn = this.curFn.parent; + } + + reference(idNode) { + if (idNode.name === "undefined") { + this.refs.set(idNode, null); + return; + } + let binding = this.curScope.lookup(idNode.name); + this.refs.set(idNode, binding); // null = global + if (!binding) return; + + if (binding.fnInfo !== this.curFn) { + binding.captured = true; + // every function on the chain between the reference and the + // declaration needs access to its parent's environment + let f = this.curFn; + while (f && f !== binding.fnInfo) { + f.needsParentEnv = true; + f = f.parent; + } + } + } + + // --- statements --------------------------------------------------------------- + + walkStmt(n) { + switch (n.type) { + case b.BlockStatement: { + this.curScope = new LexScope(this.curScope, this.curFn); + for (let s of n.body) this.walkStmt(s); + this.curScope = this.curScope.parent; + return; + } + case b.VariableDeclaration: + for (let d of n.declarations) { + if (d.id.type !== b.Identifier) + throw new LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); + if (d.init) this.walkExpr(d.init); + // declare after walking the init: `let x = x` refers outward + let binding = this.curScope.declare(d.id.name, "local"); + this.refs.set(d.id, binding); + } + return; + case b.FunctionDeclaration: { + if (!n.id) throw new LowerNotSupported("unnamed function declaration", n.loc); + let binding = this.curScope.declare(n.id.name, "fn"); + this.refs.set(n.id, binding); + let name = this.curFn ? `${this.curFn.name}.${n.id.name}` : n.id.name; + this.enterFunction(n, name); + this.walkStmt(n.body); + this.leaveFunction(); + return; + } + case b.ExpressionStatement: + this.walkExpr(n.expression); + return; + case b.IfStatement: + this.walkExpr(n.test); + this.walkStmt(n.consequent); + if (n.alternate) this.walkStmt(n.alternate); + return; + case b.WhileStatement: + this.walkExpr(n.test); + this.walkStmt(n.body); + return; + case b.DoWhileStatement: + this.walkStmt(n.body); + this.walkExpr(n.test); + return; + case b.ForStatement: { + this.curScope = new LexScope(this.curScope, this.curFn); + if (n.init) { + if (n.init.type === b.VariableDeclaration) this.walkStmt(n.init); + else this.walkExpr(n.init); + } + if (n.test) this.walkExpr(n.test); + if (n.update) this.walkExpr(n.update); + this.walkStmt(n.body); + this.curScope = this.curScope.parent; + return; + } + case b.ReturnStatement: + if (n.argument) this.walkExpr(n.argument); + return; + case b.ThrowStatement: + this.walkExpr(n.argument); + return; + case b.TryStatement: { + if (n.finalizer) + throw new LowerNotSupported("try/finally (desugar it first)", n.loc); + if (!n.handlers || n.handlers.length !== 1) + throw new LowerNotSupported("try without exactly one catch", n.loc); + this.walkStmt(n.block); + let handler = n.handlers[0]; + this.curScope = new LexScope(this.curScope, this.curFn); + if (handler.param) { + if (handler.param.type !== b.Identifier) + throw new LowerNotSupported("catch parameter pattern", n.loc); + let binding = this.curScope.declare(handler.param.name, "catch"); + this.refs.set(handler.param, binding); + } + this.walkStmt(handler.body); + this.curScope = this.curScope.parent; + return; + } + case b.BreakStatement: + case b.ContinueStatement: + if (n.label) throw new LowerNotSupported("labeled break/continue", n.loc); + return; + case b.EmptyStatement: + return; + default: + throw new LowerNotSupported(`statement type ${n.type}`, n.loc); + } + } + + // --- expressions ------------------------------------------------------------ + + walkExpr(n) { + switch (n.type) { + case b.Literal: + return; + case b.Identifier: + this.reference(n); + return; + case b.BinaryExpression: + case b.LogicalExpression: + this.walkExpr(n.left); + this.walkExpr(n.right); + return; + case b.UnaryExpression: + this.walkExpr(n.argument); + return; + case b.AssignmentExpression: + if (n.left.type === b.Identifier) this.reference(n.left); + else this.walkExpr(n.left); + this.walkExpr(n.right); + return; + case b.CallExpression: + case b.NewExpression: + this.walkExpr(n.callee); + for (let a of n.arguments) this.walkExpr(a); + return; + case b.MemberExpression: + this.walkExpr(n.object); + if (n.computed) this.walkExpr(n.property); + return; + case b.ConditionalExpression: + this.walkExpr(n.test); + this.walkExpr(n.consequent); + this.walkExpr(n.alternate); + return; + case b.FunctionExpression: { + let name = (n.id && n.id.name) || "anon"; + this.enterFunction(n, this.curFn ? `${this.curFn.name}.${name}` : name); + this.walkStmt(n.body); + this.leaveFunction(); + return; + } + case b.ThisExpression: + return; + case b.SequenceExpression: + for (let e of n.expressions) this.walkExpr(e); + return; + case b.ArrayExpression: + for (let e of n.elements) if (e) this.walkExpr(e); + return; + case b.ObjectExpression: + for (let p of n.properties) { + if (p.computed) this.walkExpr(p.key); + this.walkExpr(p.value); + } + return; + default: + throw new LowerNotSupported(`expression type ${n.type}`, n.loc); + } + } +} + +// assign env slots for `info` and every function below it +function assignSlots(info) { + let next = 0; + // a parent pointer is only needed in the env if this function actually + // allocates one; if it doesn't, its incoming env already *is* the parent + let captured = info.bindings.filter((bd) => bd.captured); + let wantsEnv = captured.length > 0; + if (wantsEnv && info.needsParentEnv && info.parent !== null) { + info.parentSlot = next++; + } + for (let bd of captured) bd.slot = next++; + info.envSize = next; + + for (let child of info.children) assignSlots(child); +} diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 8abd29a3..93fe14fb 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -9,16 +9,14 @@ import { FunctionBuilder } from "./builder"; import { printFunction, printModule } from "./printer"; -import { verifyFunction } from "./verifier"; +import { verifyFunction, verifyModule } from "./verifier"; import { lowerFunctionNode, lowerProgram, LowerNotSupported } from "./lower"; import { Func, Block, Inst } from "./ir"; import * as esprima from "../../external-deps/esprima/esprima-es6"; let failures = 0; -let current = ""; function test(name, fn) { - current = name; try { fn(); console.log(`pass: ${name}`); @@ -43,12 +41,23 @@ function findBlock(fn, prefix) { throw new Error(`no block named ${prefix}* in @${fn.name}`); } +function findFn(mod, name) { + for (let f of mod.functions) if (f.name === name) return f; + throw new Error(`no function @${name} in module`); +} + function parseFn(src) { let ast = esprima.parse(src, { loc: true, raw: true }); for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; throw new Error("no function declaration in source"); } +function lowerOne(src) { + let r = lowerFunctionNode(parseFn(src)); + verifyModule(r.module); + return r; +} + // --- builder ------------------------------------------------------------------ test("builder: diamond join inserts a block param", () => { @@ -80,12 +89,7 @@ test("builder: diamond join inserts a block param", () => { verifyFunction(fn); assert(x.op === "blockparam", "join read should be a block param"); - let join = findBlock(fn, "join"); - assert(join.params.length === 1, "join should have exactly one param"); - - let printed = printFunction(fn); - assertContains(printed, "const kind=\"number\", value=1"); - assertContains(printed, "const kind=\"number\", value=2"); + assert(findBlock(fn, "join").params.length === 1, "join should have exactly one param"); }); test("builder: same value in both arms leaves no param", () => { @@ -118,67 +122,191 @@ test("builder: same value in both arms leaves no param", () => { assert(findBlock(fn, "join").params.length === 0, "no params expected at join"); }); -// --- lowering ----------------------------------------------------------------- +// --- lowering: SSA shapes ------------------------------------------------------- test("lower: loop-invariant variable gets no header param", () => { - let fn = lowerFunctionNode(parseFn("function f(c) { let a = 5; while (c) { } return a; }")); - verifyFunction(fn); - let header = findBlock(fn, "while_header"); - assert(header.params.length === 0, `header params = ${header.params.length}`); + let { fn } = lowerOne("function f(c) { let a = 5; while (c) { } return a; }"); + assert(findBlock(fn, "while_header").params.length === 0, "header should have no params"); }); test("lower: loop counter gets exactly one header param", () => { - let fn = lowerFunctionNode( - parseFn("function g(n) { let i = 0; while (i < n) { i = i + 1; } return i; }") + let { fn } = lowerOne( + "function g(n) { let i = 0; while (i < n) { i = i + 1; } return i; }" ); - verifyFunction(fn); let header = findBlock(fn, "while_header"); assert(header.params.length === 1, `header params = ${header.params.length}`); - let printed = printFunction(fn); - assertContains(printed, "lt"); - assertContains(printed, "add"); }); test("lower: if/else assigns and joins", () => { - let fn = lowerFunctionNode( - parseFn("function h(c) { let x = 0; if (c) { x = 1; } else { x = 2; } return x; }") + let { fn } = lowerOne( + "function h(c) { let x = 0; if (c) { x = 1; } else { x = 2; } return x; }" ); - verifyFunction(fn); - let join = findBlock(fn, "if_join"); - assert(join.params.length === 1, `join params = ${join.params.length}`); + assert(findBlock(fn, "if_join").params.length === 1, "join should have one param"); }); test("lower: logical && short-circuits through a join param", () => { - let fn = lowerFunctionNode(parseFn("function a(x, y) { return x && y; }")); - verifyFunction(fn); + let { fn } = lowerOne("function a(x, y) { return x && y; }"); let printed = printFunction(fn); assertContains(printed, "logical_join"); assertContains(printed, "cond_br"); }); test("lower: method calls and property access", () => { - let fn = lowerFunctionNode( - parseFn("function m(o) { o.count = o.count + 1; return o.get(o.count, 3); }") + let { fn } = lowerOne( + "function m(o) { o.count = o.count + 1; return o.get(o.count, 3); }" ); - verifyFunction(fn); let printed = printFunction(fn); assertContains(printed, 'get_prop_atom'); assertContains(printed, 'atom="count"'); assertContains(printed, 'set_prop_atom'); - assertContains(printed, 'atom="get"'); assertContains(printed, "call"); }); test("lower: globals resolve to get_global", () => { - let fn = lowerFunctionNode(parseFn("function p(x) { return console.log(x); }")); - verifyFunction(fn); + let { fn } = lowerOne("function p(x) { return console.log(x); }"); assertContains(printFunction(fn), 'get_global atom="console"'); }); +test("lower: for loop with break/continue", () => { + let { fn } = lowerOne( + "function bc(n) { let s = 0; " + + "for (let i = 0; i < n; i = i + 1) { " + + "if (i === 3) continue; if (i === 7) break; s = s + i; } " + + "return s; }" + ); + let header = findBlock(fn, "for_header"); + assert(header.params.length === 2, `header params = ${header.params.length} (want s, i)`); +}); + +test("lower: do-while", () => { + let { fn } = lowerOne( + "function dw(n) { let i = 0; do { i = i + 1; } while (i < n); return i; }" + ); + findBlock(fn, "do_body"); + findBlock(fn, "do_cond"); +}); + +// --- lowering: closures / environments -------------------------------------------- + +test("lower: closure counter allocates an env and captures", () => { + let { module, fn } = lowerOne( + "function outer() { let c = 0; function inc() { c = c + 1; return c; } return inc; }" + ); + assert(module.functions.length === 2, "module should have outer + inc"); + + let printed_outer = printFunction(fn); + assertContains(printed_outer, "make_env size=1"); + assertContains(printed_outer, "env_store"); + assertContains(printed_outer, 'make_closure'); + assertContains(printed_outer, 'fn="outer.inc"'); + + let inc = findFn(module, "outer.inc"); + let printed_inc = printFunction(inc); + assertContains(printed_inc, "env_load"); + assertContains(printed_inc, "env_store"); +}); + +test("lower: capture through an env-less intermediate function", () => { + let { module } = lowerOne( + "function o() { let x = 1; " + + "function mid() { function inner() { return x; } return inner; } " + + "return mid; }" + ); + assert(module.functions.length === 3, "module should have o, mid, inner"); + + // mid captures nothing itself: no env of its own, it forwards its + // incoming env to inner's closure + let mid = findFn(module, "o.mid"); + let printed_mid = printFunction(mid); + assert(printed_mid.indexOf("make_env") === -1, "mid should not allocate an env"); + assertContains(printed_mid, "make_closure"); + + // inner reads x straight out of its incoming env (zero hops) + let inner = findFn(module, "o.mid.inner"); + let printed_inner = printFunction(inner); + assertContains(printed_inner, "env_load"); + assert(printed_inner.indexOf("slot=0") !== -1, "x should live in slot 0 of o's env"); +}); + +test("lower: captured parameter is stored to the env at entry", () => { + let { fn } = lowerOne( + "function k(x) { function get() { return x; } return get; }" + ); + let printed = printFunction(fn); + assertContains(printed, "make_env size=1"); + assertContains(printed, "env_store"); +}); + +test("lower: function expressions become closures", () => { + let { module, fn } = lowerOne( + "function fe() { let f = function (a) { return a + 1; }; return f(2); }" + ); + assert(module.functions.length === 2, "module should have fe + anon"); + assertContains(printFunction(fn), "make_closure"); +}); + +// --- lowering: exceptions --------------------------------------------------------- + +test("lower: try/catch produces unwind edges into a catch block", () => { + let { fn } = lowerOne( + "function t(o) { try { o.f(); } catch (e) { return e; } return 1; }" + ); + let printed = printFunction(fn); + assertContains(printed, "unwind ^catch"); + assertContains(printed, "normal ^cont"); + assertContains(printed, ": exception):"); + + let catch_bb = findBlock(fn, "catch"); + assert(catch_bb.isCatch, "catch block should be marked"); + assert(catch_bb.params[0].isException, "first catch param is the exception"); +}); + +test("lower: throw inside try unwinds to the local handler", () => { + let { fn } = lowerOne( + "function th(c) { try { if (c) throw c; } catch (e) { return e; } return 0; }" + ); + let printed = printFunction(fn); + assertContains(printed, "throw"); + assertContains(printed, "unwind ^catch"); +}); + +test("lower: variable state joins into the catch block per throw site", () => { + let { fn } = lowerOne( + "function j(o) { let x = 1; try { o.a(); x = 2; o.b(); } catch (e) { return x; } return x; }" + ); + // catch reads x: its value differs by which call threw, so the catch + // block needs a (non-exception) param joining 1 and 2. + let catch_bb = findBlock(fn, "catch"); + assert( + catch_bb.params.length === 2, + `catch should have exception + x params, got ${catch_bb.params.length}` + ); +}); + +// --- lowering: misc ------------------------------------------------------------------ + +test("lower: new expressions become construct", () => { + let { fn } = lowerOne("function nw(C) { return new C(1, 2); }"); + assertContains(printFunction(fn), "construct"); +}); + +test("lower: array and object literals", () => { + let { fn } = lowerOne("function lit() { return [1, 2, { a: 3, b: 4 }]; }"); + let printed = printFunction(fn); + assertContains(printed, "make_array"); + assertContains(printed, 'make_object'); + assertContains(printed, 'keys=["a", "b"]'); +}); + +test("lower: this expression", () => { + let { fn } = lowerOne("function tt() { return this.x; }"); + assertContains(printFunction(fn), "get_prop_atom"); +}); + test("lower: unsupported constructs raise LowerNotSupported", () => { let threw = false; try { - lowerFunctionNode(parseFn("function t(x) { try { x(); } catch (e) { } }")); + lowerFunctionNode(parseFn("function t(x) { for (let k in x) { } }")); } catch (e) { threw = e instanceof LowerNotSupported; } @@ -192,9 +320,7 @@ test("lower: program with several functions", () => { ); let mod = lowerProgram(ast, "twofns"); assert(mod.functions.length === 2, "two functions"); - let printed = printModule(mod); - assertContains(printed, "fn @one"); - assertContains(printed, "fn @two"); + verifyModule(mod); }); // --- verifier ------------------------------------------------------------------ @@ -223,8 +349,7 @@ test("verifier: rejects use that is not dominated by its def", () => { ra.block = a_bb; a_bb.insts.push(ra); - // b uses a's value: invalid - let bad = new Inst(fn, "add", [c1, c1], {}); + let bad = new Inst(fn, "strict_eq", [c1, c1], {}); bad.block = b_bb; b_bb.insts.push(bad); let rb = new Inst(fn, "return", [bad], {}); @@ -257,6 +382,37 @@ test("verifier: rejects unterminated blocks", () => { assert(threw, "expected a no-terminator error"); }); +test("verifier: rejects normal edges into catch blocks", () => { + let fn = new Func("badedge", []); + let entry = fn.addBlock(new Block(fn, "entry")); + let catch_bb = fn.addBlock(new Block(fn, "catch")); + catch_bb.isCatch = true; + let exc = catch_bb.addParam("%exception"); + exc.isException = true; + entry.sealed = catch_bb.sealed = true; + fn.entry = entry; + + let br = new Inst(fn, "br", [], {}); + br.block = entry; + entry.insts.push(br); + br.addTarget(catch_bb, []); + + let c = new Inst(fn, "const", [], { kind: "number", value: 0 }); + c.block = catch_bb; + catch_bb.insts.push(c); + let r = new Inst(fn, "return", [c], {}); + r.block = catch_bb; + catch_bb.insts.push(r); + + let threw = false; + try { + verifyFunction(fn); + } catch (e) { + threw = /non-unwind edge into catch/.test(e.message); + } + assert(threw, "expected a catch-edge violation"); +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/lib/eir/verifier.js b/lib/eir/verifier.js index d74f4160..f90b9e7b 100644 --- a/lib/eir/verifier.js +++ b/lib/eir/verifier.js @@ -116,12 +116,23 @@ export function verifyFunction(fn) { } if (!term) fail(`block ^${b.name} has no terminator`); - // edge argument counts match target params + // edge argument counts match target params (catch blocks' exception + // param is produced by unwinding, not passed on the edge) if (term.targets) { for (let t of term.targets) { - if (t.args.length !== t.block.params.length) + let expected = t.block.params.length; + if (t.block.isCatch) { + if (t.kind !== "unwind") + fail(`non-unwind edge into catch block ^${t.block.name}`, term); + if (t.block.params.length === 0 || !t.block.params[0].isException) + fail(`catch block ^${t.block.name} missing its exception param`, term); + expected -= 1; + } else if (t.kind === "unwind") { + fail(`unwind edge into non-catch block ^${t.block.name}`, term); + } + if (t.args.length !== expected) fail( - `edge to ^${t.block.name} passes ${t.args.length} args, target has ${t.block.params.length} params`, + `edge to ^${t.block.name} passes ${t.args.length} args, target wants ${expected}`, term ); for (let a of t.args) From edd64c7e3687d610a9d6c1f4d91e30b4dce6083e Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 18:22:31 -0700 Subject: [PATCH 019/146] EIR->LLVM emitter behind --ir, with per-function fallback the emitter (lib/eir/emit.js) maps every EIR value to an LLVM SSA value: block arguments become phis, invoke-style instructions become llvm invokes landing in the catch block's landingpad (begin/end_catch fetch the thrown ejsval), and the only allocas are the outgoing-args scratch area and the &this slot the runtime calling convention wants -- locals never touch memory, so there is nothing for mem2reg to do. it borrows the active LLVMIRVisitor's module/abi/runtime interfaces and atom machinery, so EIR and legacy functions coexist in one compilation unit. --ir (ejs-es6.js flag) turns on candidate collection (eir/integrate.js): v1 candidates are closed top-level function declarations -- every free name must be a real global, since module-scope interop comes later. candidates lower+verify before the legacy passes run; the legacy visitFunction then emits a forwarding thunk to the EIR-emitted function instead of a body. anything unsupported falls back per function via LowerNotSupported. direct recursion is the first language-aware win: a function's self-name binds as a "self" binding and self-calls compile to direct llvm calls (no closure dispatch), forwarding the incoming env. fixes along the way: - node-llvm: CreatePhi now returns the PHINode wrapper (addIncoming); PHINode::Create was a declared-but-undefined shadow of the template's, which -undefined dynamic_lookup turned into a jump to address 0 - scope analysis: var hoists to the function scope (it was block-scoped, breaking v8 function-override semantics); anon function names are uniquified; default/rest params, generators, duplicate and block-level function declarations fall back - the llvm entry block stays terminator-free until the end of emission (legacy cached-literal helpers append initializing stores to it), with a separate prologue block for the guarded argc/args parameter loads - eir sources restyled to avoid a legacy DesugarTemplates miscompile (template-in-arrow-in-template), so stage1 can self-host them validation: //:test-stage0-ir runs the full suite with --ir: 373 pass / 26 xfail / 0 fail. 69/125 top-level functions in the corpus (55%) lower to verified EIR and 62 test files exercise the EIR codegen path; the rest fall back cleanly. //:test-eir, //:test-stage0, //:test-stage1 all green; stage2/stage3 fixed point still holds. Co-Authored-By: Claude Fable 5 --- BUCK | 17 ++ buck-test-stage.sh | 18 +- ejs-es6.js | 5 + lib/compiler.js | 41 +++ lib/eir/emit.js | 604 ++++++++++++++++++++++++++++++++++++++++ lib/eir/integrate.js | 125 +++++++++ lib/eir/lower.js | 18 ++ lib/eir/ops.js | 4 +- lib/eir/printer.js | 15 +- lib/eir/scopes.js | 70 ++++- lib/eir/verifier.js | 9 +- node-llvm/irbuilder.cpp | 5 +- node-llvm/phinode.h | 5 +- test/tester.js | 5 +- 14 files changed, 921 insertions(+), 20 deletions(-) create mode 100644 lib/eir/emit.js create mode 100644 lib/eir/integrate.js diff --git a/BUCK b/BUCK index f938809b..a2d9c34e 100644 --- a/BUCK +++ b/BUCK @@ -99,6 +99,23 @@ genrule( # run the test suite against a stage: buck2 build //:test-stage3 # the output artifact is the full test log; the build fails if any test # fails. +genrule( + name = "test-stage0", + srcs = ["buck-test-stage.sh"], + out = "test-stage0.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" - 0 "$(location //test:files)" ' + llvm_bindir(), +) + +genrule( + name = "test-stage0-ir", + srcs = ["buck-test-stage.sh"], + out = "test-stage0-ir.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" - 0 "$(location //test:files)" ' + llvm_bindir() + + " --ir", +) + [ genrule( name = "test-stage" + stage, diff --git a/buck-test-stage.sh b/buck-test-stage.sh index 7b1ef76b..a0f7e0b8 100644 --- a/buck-test-stage.sh +++ b/buck-test-stage.sh @@ -7,10 +7,11 @@ set -euo pipefail TREE="$1" # //:srcdir-tree GENERATED="$2" # //lib:generated (tester requires ../lib/generated/.../host-config.js) -STAGE_EXE="$3" # //:ejs.exe.stageN +STAGE_EXE="$3" # //:ejs.exe.stageN, or "-" for stage 0 (node-hosted) STAGE_NUM="$4" # N TEST_FILES="$5" # //test:files LLVM_BIN="$6" # directory holding llc/opt +EXTRA_FLAGS="${7:-}" # extra compiler flags, e.g. --ir # node_modules (glob/colors/temp for the tester) come from the repo, same # as the babel step in //lib:generated. @@ -25,8 +26,14 @@ cp -RL "$TREE"/. "$WORK/" chmod -R u+w "$WORK" mkdir -p "$WORK/lib/generated" cp -RL "$GENERATED"/. "$WORK/lib/generated/" -cp "$STAGE_EXE" "$WORK/ejs.exe.stage$STAGE_NUM" -chmod +x "$WORK/ejs.exe.stage$STAGE_NUM" +if [ "$STAGE_NUM" = "0" ]; then + # stage 0 runs the babel'd compiler under node via the ../ejs driver + printf '#!/bin/sh\ndir=$(cd `dirname $0`; pwd)\nexec node $dir/lib/generated/ejs-es6.js "$@"\n' > "$WORK/ejs" + chmod +x "$WORK/ejs" +else + cp "$STAGE_EXE" "$WORK/ejs.exe.stage$STAGE_NUM" + chmod +x "$WORK/ejs.exe.stage$STAGE_NUM" +fi mkdir -p "$WORK/test" cp -RL "$TEST_FILES"/. "$WORK/test/" chmod -R u+w "$WORK/test" @@ -38,7 +45,10 @@ find "$WORK/test" -name '*.js' -exec touch {} + find "$WORK/test/expected" -type f -exec touch {} + export PATH="$LLVM_BIN:$PATH" -export NODE_PATH="$REPO/node_modules" +export NODE_PATH="$REPO/node_modules:$REPO/node-llvm/build/Release" +if [ -n "$EXTRA_FLAGS" ]; then + export EJS_EXTRA_FLAGS="$EXTRA_FLAGS" +fi if [ "$(uname -s)" = "Darwin" ]; then export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" fi diff --git a/ejs-es6.js b/ejs-es6.js index 18bbe8a5..e68e90d2 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -108,6 +108,7 @@ let options = { osx_min: "11.0", import_variables: [], srcdir: false, + ir: false, stdout_writer: new Writer(process.stdout), }; @@ -184,6 +185,10 @@ let args = { flag: "quiet", help: "don't output anything during compilation except errors.", }, + "--ir": { + flag: "ir", + help: "use the EIR (SSA) pipeline for eligible functions, falling back per function.", + }, "-I": { handler: add_import_variable, handlerArgc: 1, diff --git a/lib/compiler.js b/lib/compiler.js index a175336c..4983d392 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -27,6 +27,8 @@ import { import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; +import { collectEIRFunctions } from "./eir/integrate"; +import { EIREmitter } from "./eir/emit"; let ir = llvm.IRBuilder; @@ -1247,6 +1249,8 @@ class LLVMIRVisitor extends TreeVisitor { } visitFunction(n) { + if (n.eir_module) return this.emitEIRThunk(n); + if (!n.toplevel) debug.log( () => @@ -1359,6 +1363,38 @@ class LLVMIRVisitor extends TreeVisitor { return ir_func; } + // an EIR-owned function: emit its EIR module (once) and fill this + // function's body with a forwarding call. closure creation and env + // plumbing stay entirely on the legacy side; the thunk just hands the + // builtin arguments through. + emitEIRThunk(n) { + let insertBlock = ir.getInsertBlock(); + let saved_function = this.currentFunction; + + if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); + let eir_fns = this.eir_emitter.emitModule(n.eir_module); + let target = eir_fns.get(n.eir_main); + + let ir_func = n.ir_func; + this.currentFunction = ir_func; + let entry_bb = new llvm.BasicBlock("entry", ir_func); + ir.setInsertPoint(entry_bb); + + let args = ir_func.args; + let rv = this.abi.createCall( + ir_func, + target.type, + target, + [args[0], args[1], args[2], args[3], args[4]], + "eir_result" + ); + this.abi.createRet(ir_func, rv); + + this.currentFunction = saved_function; + if (insertBlock) ir.setInsertPoint(insertBlock); + return ir_func; + } + createRet(x) { //this.createCall this.ejs_runtime.log, [consts.string(ir, `leaving ${this.currentFunction.name}`)], '' return this.abi.createRet(this.currentFunction, x); @@ -3478,6 +3514,11 @@ export function compile(tree, base_output_filename, source_filename, module_info tree = insert_toplevel_func(tree, this_module_info); + if (options.ir) { + let { lowered, fellback } = collectEIRFunctions(tree, source_filename); + debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); + } + debug.log(() => escodegenerate(tree)); let toplevel_name = tree.body[0].id.name; diff --git a/lib/eir/emit.js b/lib/eir/emit.js new file mode 100644 index 00000000..d800e3b2 --- /dev/null +++ b/lib/eir/emit.js @@ -0,0 +1,604 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// EIR -> LLVM emission. +// +// Every EIR value becomes an LLVM SSA value; block arguments become phis; +// invoke-style instructions (normal/unwind targets) become llvm invokes +// landing in the catch block's landingpad. The only allocas are the arg +// scratch area and the &this slot that the runtime calling convention +// requires -- locals never touch memory, and mem2reg has nothing to do. +// +// The emitter borrows the active LLVMIRVisitor's infrastructure (llvm +// module, abi, runtime interface, atom/string-literal machinery), so EIR +// functions and legacy functions coexist in one compilation unit. The +// legacy path calls into EIR functions through a small forwarding thunk +// (see compiler.js visitFunction), which keeps closure creation and env +// plumbing entirely on the legacy side for now. + +import * as llvm from "@llvm"; +import * as types from "../types"; +import * as consts from "../consts"; + +let ir = llvm.IRBuilder; + +// EIR opcode -> the operator key used by runtime.js's binop interface +const binop_for_op = { + add: "+", + sub: "-", + mul: "*", + div: "/", + mod: "%", + lt: "<", + le: "<=", + gt: ">", + ge: ">=", + loose_eq: "==", + loose_neq: "!=", + strict_eq: "===", + strict_neq: "!==", + bitand: "&", + bitor: "|", + bitxor: "^", + shl: "<<", + shr: ">>", + ushr: ">>>", + instanceof: "instanceof", + in: "in", +}; + +const unop_for_op = { + logical_not: "!", + neg: "-", + unary_plus: "+", + bitnot: "~", + typeof: "typeof", +}; + +let mangle_gen = 0; + +export class EIREmitter { + // visitor: the active LLVMIRVisitor; we use its module, abi, + // ejs_runtime/ejs_binops interfaces, getAtom, and ejs_globals. + constructor(visitor) { + this.v = visitor; + this.abi = visitor.abi; + this.module = visitor.module; + } + + // declare + define every function in an EIR module; returns a Map of + // eir function name -> llvm.Function + emitModule(eirModule) { + let saved_insert = ir.getInsertBlock(); + + let fns = new Map(); + for (let fn of eirModule.functions) { + if (fns.has(fn.name)) + throw new Error(`EIR emit: duplicate function name '${fn.name}' in module`); + let llvm_name = `_ejs_eir_${fn.name.replace(/[^A-Za-z0-9_]/g, "_")}_${mangle_gen++}`; + let llvm_fn = types.takes_builtins( + this.abi.createFunction( + this.module, + llvm_name, + this.abi.ejs_return_type, + this.abi.ejs_params.map((p) => p.llvm_type) + ) + ); + llvm_fn.setInternalLinkage(); + fns.set(fn.name, llvm_fn); + } + this.llvm_fns = fns; + + for (let fn of eirModule.functions) this.emitFunction(fn, fns.get(fn.name)); + + if (saved_insert) ir.setInsertPoint(saved_insert); + return fns; + } + + emitFunction(eirFn, llvmFn) { + this.eirFn = eirFn; + this.llvmFn = llvmFn; + this.values = new Map(); // eir Inst -> llvm value + this.blocks = new Map(); // eir Block -> llvm BasicBlock + this.phis = new Map(); // eir blockparam Inst -> llvm phi + + // legacy machinery (getAtom / literal loads) expects these on the + // visitor's current function + let saved_function = this.v.currentFunction; + this.v.currentFunction = llvmFn; + + let entry_bb = new llvm.BasicBlock("entry", llvmFn); + ir.setInsertPoint(entry_bb); + llvmFn.entry_bb = entry_bb; // literal allocas / legacy helpers want this + llvmFn.literalAllocas = Object.create(null); + + let args = llvmFn.args; + let env = args[0]; + let this_ptr = args[1]; + let argc = args[2]; + let args_ptr = args[3]; + + // scratch space for outgoing call arguments, and a slot for passing + // &this to the runtime's calling convention + let max_args = this.maxOutgoingArgs(eirFn); + this.scratch = null; + this.scratch_type = null; + if (max_args > 0) { + this.scratch_type = llvm.ArrayType.get(types.EjsValue, max_args); + this.scratch = ir.createAlloca(this.scratch_type, "args_scratch"); + this.scratch.setAlignment(8); + } + this.this_slot = ir.createAlloca(types.EjsValue, "this_slot"); + this.this_slot.setAlignment(8); + + // create llvm blocks for every eir block, and phis for their params + for (let b of eirFn.blocks) { + let bb = new llvm.BasicBlock(b.name, llvmFn); + this.blocks.set(b, bb); + } + for (let b of eirFn.blocks) { + if (b === eirFn.entry) continue; + ir.setInsertPoint(this.blocks.get(b)); + for (let p of b.params) { + if (p.isException) continue; // materialized by the landingpad below + let phi = ir.createPhi(types.EjsValue, b.predEdges.length, `p_${p.id}`); + this.phis.set(p, phi); + this.values.set(p, phi); + } + if (b.isCatch) this.emitCatchPrologue(b); + } + + // entry prologue: bind the eir entry params. this happens in a + // separate block because entry_bb must stay terminator-free until + // the very end: the legacy cached-literal helpers append their + // initializing stores to it whenever a literal is first used. + let prologue_bb = new llvm.BasicBlock("prologue", llvmFn); + ir.setInsertPoint(prologue_bb); + let entry_params = eirFn.entry.params; + // params[0] = %env, params[1] = %this, rest are JS formals + if (entry_params.length > 0) this.values.set(entry_params[0], env); + if (entry_params.length > 1) { + let this_val = ir.createLoad(types.EjsValue, this_ptr, "this"); + this.values.set(entry_params[1], this_val); + } + for (let i = 2; i < entry_params.length; i++) + this.values.set(entry_params[i], this.emitArgLoad(argc, args_ptr, i - 2)); + // remember where the prologue ended; the branch into the eir entry + // block is emitted *after* the body, because the legacy cached- + // literal helpers append their initializing stores to the end of + // whatever block is "entry" at the time they're first used. + let prologue_end = ir.getInsertBlock(); + + // emit every block's instructions + for (let b of eirFn.blocks) { + ir.setInsertPoint(this.blocks.get(b)); + for (let inst of b.insts) this.emitInst(inst); + } + + ir.setInsertPoint(prologue_end); + ir.createBr(this.blocks.get(eirFn.entry)); + ir.setInsertPoint(entry_bb); + ir.createBr(prologue_bb); + + this.v.currentFunction = saved_function; + return llvmFn; + } + + // args[i] if i < argc, else undefined -- guarded load with a phi join + emitArgLoad(argc, args_ptr, i) { + let load_bb = new llvm.BasicBlock(`arg${i}_load`, this.llvmFn); + let join_bb = new llvm.BasicBlock(`arg${i}_join`, this.llvmFn); + let from_bb = ir.getInsertBlock(); + + // materialize the fallback in the predecessor so it dominates the phi + let undef_val = this.undef(); + let cmp = ir.createICmpUGt(argc, consts.int32(i), `has_arg${i}`); + ir.createCondBr(cmp, load_bb, join_bb); + + ir.setInsertPoint(load_bb); + let gep = ir.createGetElementPointer(types.EjsValue, args_ptr, [consts.int64(i)], "argp"); + let loaded = ir.createLoad(types.EjsValue, gep, `arg${i}`); + ir.createBr(join_bb); + + ir.setInsertPoint(join_bb); + let phi = ir.createPhi(types.EjsValue, 2, `arg${i}v`); + phi.addIncoming(loaded, load_bb); + phi.addIncoming(undef_val, from_bb); + return phi; + } + + emitCatchPrologue(eirBlock) { + // landingpad; extract the exception; begin/end catch to fetch the + // thrown ejsval. end_catch releases the C++ exception object; the + // value itself is safe (conservatively scanned like any other). + let caught = ir.createLandingPad(types.EjsLandingPad, 1, "caught"); + caught.addClause( + ir.createPointerCast(this.v.ejs_runtime.exception_typeinfo, types.Int8Pointer, "") + ); + caught.setCleanup(true); + if (!this.llvmFn.hasPersonality()) + this.llvmFn.setPersonality( + ir.createPointerCast(this.v.ejs_runtime.personality, types.Int8Pointer, "personality") + ); + + let exc = ir.createExtractValue(caught, 0, "exc"); + let val = this.call(this.v.ejs_runtime.begin_catch, [exc], "caughtval"); + this.call(this.v.ejs_runtime.end_catch, [], ""); + + let exc_param = eirBlock.params[0]; + this.values.set(exc_param, val); + } + + maxOutgoingArgs(eirFn) { + let max = 0; + eirFn.forEachInst((inst) => { + if (inst.op === "call") max = Math.max(max, inst.operands.length - 2); + else if (inst.op === "construct") max = Math.max(max, inst.operands.length - 1); + else if (inst.op === "make_array") max = Math.max(max, inst.operands.length); + }); + return max; + } + + // --- helpers ------------------------------------------------------------------- + + val(operand) { + let v = this.values.get(operand); + if (v === undefined) + throw new Error(`EIR emit: no llvm value for %v${operand.id} (${operand.op})`); + return v; + } + + undef() { + return this.v.loadUndefinedEjsValue(); + } + + call(callee, argv, name) { + return this.abi.createCall(this.llvmFn, callee.type, callee, argv, name || ""); + } + + // spill values into the scratch area, returning an EjsValue* to its start + spillArgs(values) { + for (let i = 0; i < values.length; i++) { + let gep = ir.createGetElementPointer( + this.scratch_type, + this.scratch, + [consts.int32(0), consts.int64(i)], + `sp${i}` + ); + ir.createStore(values[i], gep); + } + return ir.createGetElementPointer( + this.scratch_type, + this.scratch, + [consts.int32(0), consts.int64(0)], + "spargs" + ); + } + + // emit a call to `callee` that respects this instruction's normal/unwind + // targets (invoke) or is a plain call + emitCallLike(inst, callee, argv, name) { + if (inst.targets && inst.targets.length > 0) { + let normal = null; + let unwind = null; + for (let t of inst.targets) { + if (t.kind === "unwind") unwind = t; + else normal = t; + } + this.addEdgeIncomings(inst, unwind); + this.addEdgeIncomings(inst, normal); + let normal_bb = this.blocks.get(normal.block); + let unwind_bb = this.blocks.get(unwind.block); + let rv = this.abi.createInvoke( + this.llvmFn, + callee.type, + callee, + argv, + normal_bb, + unwind_bb, + name || "" + ); + this.values.set(inst, rv); + return rv; + } + let rv = this.call(callee, argv, name); + this.values.set(inst, rv); + return rv; + } + + // fill in phi incomings for the arguments this edge passes + addEdgeIncomings(inst, target) { + if (!target) return; + let src_bb = ir.getInsertBlock(); + let params = target.block.params; + let arg_base = target.block.isCatch ? 1 : 0; + for (let i = 0; i < target.args.length; i++) { + let param = params[arg_base + i]; + let phi = this.phis.get(param); + if (!phi) throw new Error("EIR emit: edge argument for missing phi"); + phi.addIncoming(this.val(target.args[i]), src_bb); + } + } + + // --- instruction emission ----------------------------------------------------------- + + emitInst(inst) { + let rt = this.v.ejs_runtime; + + switch (inst.op) { + case "const": { + let v; + switch (inst.imms.kind) { + case "number": + v = this.v.loadDoubleEjsValue(inst.imms.value); + break; + case "atom": + v = this.v.getAtom(String(inst.imms.value)); + break; + case "boolean": + v = this.v.loadBoolEjsValue(inst.imms.value); + break; + case "undefined": + v = this.undef(); + break; + case "null": + v = this.v.loadNullEjsValue(); + break; + default: + throw new Error(`EIR emit: const kind ${inst.imms.kind}`); + } + this.values.set(inst, v); + return; + } + + case "to_boolean": { + // produce an i1 for cond_br; only ever consumed by cond_br + let truthy = this.call(rt.truthy, [this.val(inst.operands[0])], "truthy"); + let b = ir.createICmpEq(truthy, consts.True(), "tobool"); + this.values.set(inst, b); + return; + } + + case "get_prop": { + let callee = rt.object_getprop; + return this.emitCallLike( + inst, + callee, + [this.val(inst.operands[0]), this.val(inst.operands[1])], + "getprop" + ); + } + case "get_prop_atom": { + let key = this.v.getAtom(String(inst.imms.atom)); + return this.emitCallLike( + inst, + rt.object_getprop, + [this.val(inst.operands[0]), key], + "getprop" + ); + } + case "set_prop": { + return this.emitCallLike( + inst, + rt.object_setprop, + [ + this.val(inst.operands[0]), + this.val(inst.operands[1]), + this.val(inst.operands[2]), + ], + "setprop" + ); + } + case "set_prop_atom": { + let key = this.v.getAtom(String(inst.imms.atom)); + return this.emitCallLike( + inst, + rt.object_setprop, + [this.val(inst.operands[0]), key, this.val(inst.operands[1])], + "setprop" + ); + } + + case "get_global": { + let key = this.v.getAtom(String(inst.imms.atom)); + return this.emitCallLike(inst, rt.global_getprop, [key], "getglobal"); + } + case "set_global": { + let key = this.v.getAtom(String(inst.imms.atom)); + return this.emitCallLike( + inst, + rt.global_setprop, + [key, this.val(inst.operands[0])], + "setglobal" + ); + } + + case "make_env": { + let rv = this.call(rt.make_closure_env, [consts.int32(inst.imms.size)], "env"); + this.values.set(inst, rv); + return; + } + case "env_load": { + let ref = this.call( + rt.get_env_slot_ref, + [this.val(inst.operands[0]), consts.int32(inst.imms.slot)], + "slotref" + ); + this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot")); + return; + } + case "env_store": { + let ref = this.call( + rt.get_env_slot_ref, + [this.val(inst.operands[0]), consts.int32(inst.imms.slot)], + "slotref" + ); + ir.createStore(this.val(inst.operands[1]), ref); + this.values.set(inst, this.val(inst.operands[1])); + return; + } + case "make_closure": { + let target = this.llvm_fns.get(inst.imms.fn); + if (!target) throw new Error(`EIR emit: unknown closure target ${inst.imms.fn}`); + let name = this.v.getAtom(String(inst.imms.fn)); + let rv = this.call( + rt.make_closure, + [this.val(inst.operands[0]), name, target], + "closure" + ); + this.values.set(inst, rv); + return; + } + + case "call": { + if (inst.imms.direct) { + let target = this.llvm_fns.get(inst.imms.direct); + if (!target) + throw new Error(`EIR emit: unknown direct callee ${inst.imms.direct}`); + let env_val = this.val(inst.operands[0]); + let this_val = this.val(inst.operands[1]); + let dargs = inst.operands.slice(2).map((o) => this.val(o)); + ir.createStore(this_val, this.this_slot); + let dargv; + if (dargs.length > 0) dargv = this.spillArgs(dargs); + else dargv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + target, + [env_val, this.this_slot, consts.int32(dargs.length), dargv, this.undef()], + "dcall" + ); + } + let callee = this.val(inst.operands[0]); + let this_val = this.val(inst.operands[1]); + let args = inst.operands.slice(2).map((o) => this.val(o)); + ir.createStore(this_val, this.this_slot); + let argv; + if (args.length > 0) argv = this.spillArgs(args); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + rt.invoke_closure, + [callee, this.this_slot, consts.int32(args.length), argv, this.undef()], + "callres" + ); + } + case "construct": { + let callee = this.val(inst.operands[0]); + let args = inst.operands.slice(1).map((o) => this.val(o)); + ir.createStore(this.undef(), this.this_slot); + let argv; + if (args.length > 0) argv = this.spillArgs(args); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + rt.construct_closure, + [callee, this.this_slot, consts.int32(args.length), argv, callee], + "ctorres" + ); + } + + case "make_array": { + let elems = inst.operands.map((o) => this.val(o)); + let argv; + if (elems.length > 0) argv = this.spillArgs(elems); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + rt.array_new_copy, + [consts.int64(elems.length), argv], + "arr" + ); + } + case "make_object": { + let proto = ir.createLoad( + types.EjsValue, + this.v.ejs_globals.Object_prototype, + "objproto" + ); + let obj = this.call(rt.object_create, [proto], "obj"); + this.values.set(inst, obj); + for (let i = 0; i < inst.operands.length; i++) { + let key = this.v.getAtom(String(inst.imms.keys[i])); + this.call(rt.object_setprop, [obj, key, this.val(inst.operands[i])], ""); + } + return; + } + + // --- control flow --------------------------------------------------- + + case "br": { + let t = inst.targets[0]; + this.addEdgeIncomings(inst, t); + ir.createBr(this.blocks.get(t.block)); + return; + } + case "cond_br": { + let cond = this.val(inst.operands[0]); + this.addEdgeIncomings(inst, inst.targets[0]); + this.addEdgeIncomings(inst, inst.targets[1]); + ir.createCondBr( + cond, + this.blocks.get(inst.targets[0].block), + this.blocks.get(inst.targets[1].block) + ); + return; + } + case "return": { + this.abi.createRet(this.llvmFn, this.val(inst.operands[0])); + return; + } + case "throw": { + let throw_fn = this.v.ejs_runtime.throw; + if (inst.targets && inst.targets.length > 0) { + // unwinds to a local handler + let unwind = inst.targets[0]; + this.addEdgeIncomings(inst, unwind); + let cont = new llvm.BasicBlock("throw_unreachable", this.llvmFn); + this.abi.createInvoke( + this.llvmFn, + throw_fn.type, + throw_fn, + [this.val(inst.operands[0])], + cont, + this.blocks.get(unwind.block), + "" + ); + ir.setInsertPoint(cont); + ir.createUnreachable(); + } else { + this.call(throw_fn, [this.val(inst.operands[0])], ""); + ir.createUnreachable(); + } + return; + } + case "unreachable": { + ir.createUnreachable(); + return; + } + + default: { + // generic binops / unops through the runtime interfaces + let binop = binop_for_op[inst.op]; + if (binop) { + let callee = this.v.ejs_binops[binop]; + if (!callee) throw new Error(`EIR emit: no binop interface for ${binop}`); + return this.emitCallLike( + inst, + callee, + [this.val(inst.operands[0]), this.val(inst.operands[1])], + "binres" + ); + } + let unop = unop_for_op[inst.op]; + if (unop) { + let callee = this.v.ejs_runtime[`unop${unop}`]; + if (!callee) throw new Error(`EIR emit: no unop interface for ${unop}`); + return this.emitCallLike(inst, callee, [this.val(inst.operands[0])], "unres"); + } + throw new Error(`EIR emit: unhandled opcode '${inst.op}'`); + } + } + } +} diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js new file mode 100644 index 00000000..23c68b16 --- /dev/null +++ b/lib/eir/integrate.js @@ -0,0 +1,125 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// --ir integration: pick the functions the EIR pipeline can own, lower and +// verify them, and tag their AST nodes for the legacy pipeline to skip. +// +// v1 candidate rules (each one is a fallback, not a failure): +// - top-level FunctionDeclarations only; +// - the whole subtree must lower (LowerNotSupported falls back); +// - the subtree must be closed: no references to module-scope bindings +// (imports, other top-level functions/vars) -- only true globals. +// module-scope access needs env/module-slot interop with the legacy +// pipeline, which comes later. +// +// Tagged nodes keep their (emptied) body through the legacy passes; the +// legacy visitFunction emits a forwarding thunk to the EIR-emitted +// function instead of a body (see compiler.js). + +import * as b from "../ast-builder"; +import * as debug from "../debug"; +import { ScopeAnalysis } from "./scopes"; +import { lowerAnalyzedFunction } from "./lower"; +import { LowerNotSupported } from "./errors"; +import { Module } from "./ir"; +import { verifyModule } from "./verifier"; + +function collectPatternNames(pat, out) { + if (!pat) return; + switch (pat.type) { + case b.Identifier: + out.add(pat.name); + return; + case b.ArrayPattern: + for (let el of pat.elements) collectPatternNames(el, out); + return; + case b.ObjectPattern: + for (let p of pat.properties) collectPatternNames(p.value, out); + return; + case b.SpreadElement: + collectPatternNames(pat.argument, out); + return; + default: + return; + } +} + +// names bound at module scope (anything that is NOT a real global) +function collectModuleScopeNames(toplevelBody) { + let names = new Set(); + for (let stmt of toplevelBody) { + switch (stmt.type) { + case b.FunctionDeclaration: + case b.ClassDeclaration: + if (stmt.id) names.add(stmt.id.name); + break; + case b.VariableDeclaration: + for (let d of stmt.declarations) collectPatternNames(d.id, names); + break; + case b.ImportDeclaration: + for (let spec of stmt.specifiers) { + if (spec.local) names.add(spec.local.name); + else if (spec.id) names.add(spec.id.name); + } + break; + default: + break; + } + } + return names; +} + +// tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel +// function). returns { lowered, fellback } counts. +export function collectEIRFunctions(tree, filename) { + let toplevel = tree.body[0]; + let moduleNames = collectModuleScopeNames(toplevel.body.body); + + let lowered = 0; + let fellback = 0; + + for (let stmt of toplevel.body.body) { + if (stmt.type !== b.FunctionDeclaration || !stmt.id) continue; + + try { + let analysis = new ScopeAnalysis(); + let info = analysis.analyzeFunction(stmt, stmt.id.name); + + // closed-subtree check: every free name must be a real global + let module_ref = null; + for (let name of analysis.globalNames) { + if (moduleNames.has(name)) { + module_ref = name; + break; + } + } + if (module_ref !== null) { + debug.log( + 1, + `EIR: ${filename}: '${stmt.id.name}' falls back (references module binding '${module_ref}')` + ); + fellback++; + continue; + } + + let eir_module = new Module(info.name); + lowerAnalyzedFunction(info, analysis, eir_module); + verifyModule(eir_module); + + stmt.eir_module = eir_module; + stmt.eir_main = info.name; + // the legacy pipeline still visits this node (and emits the + // forwarding thunk); it doesn't need the body. + stmt.body = { type: b.BlockStatement, body: [], loc: stmt.loc }; + lowered++; + debug.log(1, `EIR: ${filename}: '${stmt.id.name}' lowered (${eir_module.functions.length} fns)`); + } catch (e) { + if (!(e instanceof LowerNotSupported)) throw e; + debug.log(1, `EIR: ${filename}: '${stmt.id.name}' falls back (${e.message})`); + fellback++; + } + } + + return { lowered: lowered, fellback: fellback }; +} diff --git a/lib/eir/lower.js b/lib/eir/lower.js index ae00034c..f463ee02 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -221,6 +221,8 @@ class LowerFunction { let binding = this.analysis.resolve(n); if (binding === null || binding === undefined) return this.b.emit("get_global", [], { atom: n.name }); + if (binding.kind === "self") + throw new LowerNotSupported("function self-reference as a value", n.loc); return this.readBinding(binding); } @@ -332,6 +334,18 @@ class LowerFunction { callee = this.b.emit("get_prop", [thisArg, key], {}); } } else { + // direct recursion: call the current function without closure + // dispatch, forwarding our own env + if (n.callee.type === b.Identifier) { + let binding = this.analysis.resolve(n.callee); + if (binding && binding.kind === "self" && binding.fnInfo === this.info) { + let dthis = this.b.constUndefined(); + let dargs = n.arguments.map((a) => this.expr(a)); + return this.b.emit("call", [this.envParam, dthis].concat(dargs), { + direct: this.info.name, + }); + } + } callee = this.expr(n.callee); thisArg = this.b.constUndefined(); } @@ -572,6 +586,10 @@ class LowerFunction { // lower one analyzed function (and, transitively, function declarations / // expressions inside it) into `module`. +export function lowerAnalyzedFunction(info, analysis, module) { + return lowerOneFunction(info, analysis, module); +} + function lowerOneFunction(info, analysis, module) { if (info.lowered) return info.fn; info.lowered = true; diff --git a/lib/eir/ops.js b/lib/eir/ops.js index 2756ce90..bbf99efd 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -94,7 +94,9 @@ export const OPS = { // construct: operands = [callee, ...args] // either may carry targets [normal, unwind] when inside a protected // region, in which case it terminates its block. - call: { arity: -1, effects: GENERIC_OP, may_terminate: true }, + // call: [callee, this, ...args], or with imms.direct set (a direct + // call to a known EIR function): [env, this, ...args] + call: { arity: -1, effects: GENERIC_OP, may_terminate: true, imms: ["direct"] }, construct: { arity: -1, effects: GENERIC_OP, may_terminate: true }, // --- allocation ------------------------------------------------------------ diff --git a/lib/eir/printer.js b/lib/eir/printer.js index 816f1683..ba774be5 100644 --- a/lib/eir/printer.js +++ b/lib/eir/printer.js @@ -30,13 +30,20 @@ export function printFunction(fn) { let lines = []; let header_params = fn.entry ? fn.entry.params.map((p) => `${nameOf(p)}: ${p.type}`) : []; - lines.push(`fn @${fn.name}(${header_params.join(", ")}) {`); + let header_str = header_params.join(", "); + lines.push(`fn @${fn.name}(${header_str}) {`); + + // note: inner templates are hoisted out of outer template expressions + // throughout this file; the legacy compiler miscompiles a template + // inside an arrow inside another template's ${} (DesugarTemplates bug). + let paramStr = (p) => `${nameOf(p)}: ${p.type}`; for (let b of fn.blocks) { let plist = ""; - if (b !== fn.entry && b.params.length > 0) - plist = `(${b.params.map((p) => `${nameOf(p)}: ${p.type}`).join(", ")})`; - else if (b !== fn.entry) plist = "()"; + if (b !== fn.entry && b.params.length > 0) { + let inner = b.params.map(paramStr).join(", "); + plist = `(${inner})`; + } else if (b !== fn.entry) plist = "()"; if (b === fn.entry) lines.push(`^${b.name}:`); else lines.push(`^${b.name}${plist}:`); diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 60bb834d..76733704 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -80,6 +80,8 @@ export class ScopeAnalysis { constructor() { this.refs = new Map(); // Identifier node -> Binding | null (global) this.fnInfos = new Map(); // Function node -> FnInfo + this.globalNames = new Set(); // free names that resolved to nothing + this.anon_gen = 0; this.curScope = null; this.curFn = null; } @@ -94,10 +96,30 @@ export class ScopeAnalysis { // --- entry point --------------------------------------------------------- + // walk a function's body without pushing a block scope: the body's + // top-level declarations belong to the function scope itself (isFnTop), + // otherwise every body-level function declaration would look like a + // block-level one. + walkFnBody(body) { + for (let s of body.body) this.walkStmt(s); + } + analyzeFunction(fnNode, name) { + // bind the function's own name outside its scope (like a named + // function expression) so recursion resolves to a "self" binding + // instead of looking like a global; lowering turns calls through + // it into direct calls. + let selfBinding = null; + if (fnNode.id && fnNode.id.name) { + this.curScope = new LexScope(this.curScope, this.curFn); + selfBinding = new Binding(fnNode.id.name, "self", null); + this.curScope.names.set(fnNode.id.name, selfBinding); + } let info = this.enterFunction(fnNode, name); - this.walkStmt(fnNode.body); + if (selfBinding) selfBinding.fnInfo = info; + this.walkFnBody(fnNode.body); this.leaveFunction(); + if (selfBinding) this.curScope = this.curScope.parent; assignSlots(info); return info; } @@ -107,8 +129,16 @@ export class ScopeAnalysis { let info = new FnInfo(fnNode, fname, this.curFn); this.fnInfos.set(fnNode, info); + if (fnNode.defaults && fnNode.defaults.some((d) => d)) + throw new LowerNotSupported("default parameters", fnNode.loc); + if (fnNode.rest) + throw new LowerNotSupported("rest parameter", fnNode.loc); + if (fnNode.generator) + throw new LowerNotSupported("generator function", fnNode.loc); + this.curFn = info; this.curScope = new LexScope(this.curScope, info); + this.curScope.isFnTop = true; for (let p of fnNode.params) { if (p.type !== b.Identifier) throw new LowerNotSupported(`param pattern ${p.type}`, fnNode.loc); @@ -128,9 +158,22 @@ export class ScopeAnalysis { this.refs.set(idNode, null); return; } + if (idNode.name === "arguments") + throw new LowerNotSupported("the arguments object", idNode.loc); let binding = this.curScope.lookup(idNode.name); this.refs.set(idNode, binding); // null = global - if (!binding) return; + if (!binding) { + this.globalNames.add(idNode.name); + return; + } + + if (binding.kind === "self") { + // only direct recursion from the function itself is supported; + // a nested function would need the closure value in its env. + if (binding.fnInfo !== this.curFn) + throw new LowerNotSupported("self-reference from a nested function", idNode.loc); + return; + } if (binding.fnInfo !== this.curFn) { binding.captured = true; @@ -159,18 +202,31 @@ export class ScopeAnalysis { if (d.id.type !== b.Identifier) throw new LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); if (d.init) this.walkExpr(d.init); - // declare after walking the init: `let x = x` refers outward - let binding = this.curScope.declare(d.id.name, "local"); + // declare after walking the init: `let x = x` refers outward. + // var declarations hoist to the function scope; only + // let/const are block-scoped. + let scope = this.curScope; + if (n.kind === "var") { + while (!scope.isFnTop) scope = scope.parent; + } + let binding = scope.declare(d.id.name, "local"); this.refs.set(d.id, binding); } return; case b.FunctionDeclaration: { if (!n.id) throw new LowerNotSupported("unnamed function declaration", n.loc); + if (!this.curScope.isFnTop) + throw new LowerNotSupported("block-level function declaration", n.loc); + if (this.curScope.names.has(n.id.name)) + throw new LowerNotSupported( + `redeclaration of function '${n.id.name}'`, + n.loc + ); let binding = this.curScope.declare(n.id.name, "fn"); this.refs.set(n.id, binding); let name = this.curFn ? `${this.curFn.name}.${n.id.name}` : n.id.name; this.enterFunction(n, name); - this.walkStmt(n.body); + this.walkFnBody(n.body); this.leaveFunction(); return; } @@ -274,9 +330,9 @@ export class ScopeAnalysis { this.walkExpr(n.alternate); return; case b.FunctionExpression: { - let name = (n.id && n.id.name) || "anon"; + let name = (n.id && n.id.name) || `anon${this.anon_gen++}`; this.enterFunction(n, this.curFn ? `${this.curFn.name}.${name}` : name); - this.walkStmt(n.body); + this.walkFnBody(n.body); this.leaveFunction(); return; } diff --git a/lib/eir/verifier.js b/lib/eir/verifier.js index f90b9e7b..d780a416 100644 --- a/lib/eir/verifier.js +++ b/lib/eir/verifier.js @@ -86,8 +86,15 @@ function dominates(idom, a, b) { } export function verifyFunction(fn) { + // inner template hoisted out of the outer template: the legacy + // compiler miscompiles nested templates through arrows. + let vname = (v) => `%v${v.id}`; let fail = (msg, inst) => { - let where = inst ? ` at '${printInst(inst, (v) => `%v${v.id}`)}'` : ""; + let where = ""; + if (inst) { + let inst_str = printInst(inst, vname); + where = ` at '${inst_str}'`; + } throw new Error(`EIR verifier: fn @${fn.name}: ${msg}${where}`); }; diff --git a/node-llvm/irbuilder.cpp b/node-llvm/irbuilder.cpp index d673a573..bf7fbfc2 100644 --- a/node-llvm/irbuilder.cpp +++ b/node-llvm/irbuilder.cpp @@ -6,6 +6,7 @@ #include "value.h" #include "instruction.h" #include "landingpad.h" +#include "phinode.h" #include "switch.h" #include "callinvoke.h" #include "basicblock.h" @@ -540,7 +541,9 @@ namespace jsllvm { REQ_INT_ARG(context, 1, incoming_values); FALLBACK_EMPTY_UTF8_ARG(context, 2, name); - Local result = Instruction::Create(static_cast(IRBuilder::builder.CreatePHI(ty, incoming_values, *name))); + // return the PHINode wrapper (not the generic Instruction one) so + // callers can use addIncoming + Local result = PHINode::Create(IRBuilder::builder.CreatePHI(ty, incoming_values, *name)); info.GetReturnValue().Set(result); } diff --git a/node-llvm/phinode.h b/node-llvm/phinode.h index a73f0995..7a05a524 100644 --- a/node-llvm/phinode.h +++ b/node-llvm/phinode.h @@ -8,7 +8,10 @@ namespace jsllvm { public: static NAN_MODULE_INIT(Init); - static v8::Local Create(::llvm::PHINode *llvm_phi); + // the base template's Create() is what we want; redeclaring it here + // (without a definition) shadowed it, and -undefined dynamic_lookup + // deferred the missing symbol to a null pointer at runtime. + using LLVMObjectWrap< ::llvm::PHINode, PHINode>::Create; private: typedef LLVMObjectWrap< ::llvm::PHINode, PHINode> BaseType; diff --git a/test/tester.js b/test/tester.js index 10909bea..784d2abb 100644 --- a/test/tester.js +++ b/test/tester.js @@ -187,9 +187,12 @@ function processOneTest(gen_expected, test, cb) { try { const start = timerStart(); const platform_target = platform_to_test ? ["--target", platform_to_test] : []; + const extra_flags = process.env.EJS_EXTRA_FLAGS + ? process.env.EJS_EXTRA_FLAGS.split(" ") + : []; const ccomp = spawn( compilers[stage_to_run], - platform_target.concat([ + platform_target.concat(extra_flags).concat([ "--srcdir", "--moduledir", "../node-compat", From 04657691e8a5eeaa19909835630181e463b5153e Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 20:33:36 -0700 Subject: [PATCH 020/146] EIR: module-scope interop + self-hosted --ir (ejs-llvm phi support) candidates no longer need to be closed: - named imports from non-native modules lower to module_slot_load (emitted as the same non-inbounds GEP into the imported module global the legacy opencoded path uses); const exports fold to their literal, matching new-cc's constval propagation - calls to sibling top-level EIR functions compile as direct calls into the shared per-file EIR module -- no closure dispatch, mutual recursion included. viability is a fixed point: siblings that fall back drag their callers with them, value-uses of a sibling or module-scope reassignment disqualify, and a late lowering failure abandons the whole file's EIR set before any AST node is tagged - module-level vars and default/namespace imports still fall back self-hosted --ir: ejs-llvm gains a PhiNode class (createPhi previously EJS_NOT_IMPLEMENTED) with addIncoming, mirroring the node-llvm fix, so the compiled compiler can emit block-arg phis. two latent legacy-pipeline bugs surfaced by self-hosting the eir sources, worked around here and left for a proper fix: - re-exporting an imported binding (export { X } where X is an import) corrupts the module slot: calls through it die with IsConstructor / not-a-function asserts. LowerNotSupported is now a plain factory + marker property (isLowerNotSupported) instead of an Error subclass, and the re-export in lower.js is gone - (previously) template-in-arrow-in-template miscompiles also: the stale make-era ejs-llvm/ejs-llvm-atoms-gen.c shadowed buck's generated copy via the quoted include (removed; that plus buck2's content-hash invalidation explained a very confusing afternoon) validation: //:test-{eir,stage0,stage0-ir,stage1,stage1-ir} all green (373 pass / 26 xfail each); ~half the corpus's top-level functions and 56 test files exercise EIR codegen, now including sibling direct calls; stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- BUCK | 12 +++ ejs-llvm/BUCK | 1 + ejs-llvm/ejs-llvm-atoms.h | 1 + ejs-llvm/ejs-llvm.cpp | 2 + ejs-llvm/irbuilder.cpp | 8 +- ejs-llvm/phinode.cpp | 99 ++++++++++++++++++ ejs-llvm/phinode.h | 14 +++ lib/compiler.js | 10 +- lib/eir/emit.js | 22 ++++ lib/eir/errors.js | 23 +++-- lib/eir/integrate.js | 211 +++++++++++++++++++++++++++++--------- lib/eir/lower.js | 79 +++++++++----- lib/eir/scopes.js | 42 ++++---- lib/eir/tests.js | 5 +- 14 files changed, 420 insertions(+), 109 deletions(-) create mode 100644 ejs-llvm/phinode.cpp create mode 100644 ejs-llvm/phinode.h diff --git a/BUCK b/BUCK index a2d9c34e..17c3698d 100644 --- a/BUCK +++ b/BUCK @@ -127,3 +127,15 @@ genrule( ) for stage in ["1", "2", "3"] ] + +[ + genrule( + name = "test-stage" + stage + "-ir", + srcs = ["buck-test-stage.sh"], + out = "test-stage" + stage + "-ir.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location :ejs.exe.stage' + stage + ')" ' + + stage + ' "$(location //test:files)" ' + llvm_bindir() + " --ir", + ) + for stage in ["1", "2", "3"] +] diff --git a/ejs-llvm/BUCK b/ejs-llvm/BUCK index 45b9a0e2..7b472993 100644 --- a/ejs-llvm/BUCK +++ b/ejs-llvm/BUCK @@ -40,6 +40,7 @@ sources = [ "globalvariable.cpp", "irbuilder.cpp", "landingpad.cpp", + "phinode.cpp", "loadinst.cpp", "module.cpp", "structtype.cpp", diff --git a/ejs-llvm/ejs-llvm-atoms.h b/ejs-llvm/ejs-llvm-atoms.h index 3aede838..cbf71c3e 100644 --- a/ejs-llvm/ejs-llvm-atoms.h +++ b/ejs-llvm/ejs-llvm-atoms.h @@ -24,6 +24,7 @@ EJS_ATOM(getParamType) EJS_ATOM(setInitializer) EJS_ATOM(setCleanup) EJS_ATOM(addClause) +EJS_ATOM(addIncoming) EJS_ATOM(getGlobalVariable) EJS_ATOM(getOrInsertIntrinsic) EJS_ATOM(getOrInsertFunction) diff --git a/ejs-llvm/ejs-llvm.cpp b/ejs-llvm/ejs-llvm.cpp index 237a1de3..0c88c7cc 100644 --- a/ejs-llvm/ejs-llvm.cpp +++ b/ejs-llvm/ejs-llvm.cpp @@ -21,6 +21,7 @@ #include "allocainst.h" #include "loadinst.h" #include "landingpad.h" +#include "phinode.h" #include "dibuilder.h" namespace ejsllvm { @@ -66,6 +67,7 @@ _ejs_llvm_init (ejsval global) ConstantFP_init (global); Switch_init (global); LandingPad_init (global); + PhiNode_init (global); AllocaInst_init (global); LoadInst_init (global); #if notyet diff --git a/ejs-llvm/irbuilder.cpp b/ejs-llvm/irbuilder.cpp index 6a892477..e05b3e22 100644 --- a/ejs-llvm/irbuilder.cpp +++ b/ejs-llvm/irbuilder.cpp @@ -13,6 +13,7 @@ #include "type.h" #include "value.h" #include "landingpad.h" +#include "phinode.h" #include "switch.h" #include "callinvoke.h" #include "basicblock.h" @@ -258,16 +259,11 @@ namespace ejsllvm { } static EJS_NATIVE_FUNC(IRBuilder_createPhi) { - EJS_NOT_IMPLEMENTED(); -#if notyet REQ_LLVM_TYPE_ARG(0, ty); REQ_INT_ARG(1, incoming_values); FALLBACK_EMPTY_UTF8_ARG(2, name); - ejsval rv = Value_new (_llvm_builder.CreatePHI(ty, incoming_values, name)); - free (name); - return rv; -#endif + return PhiNode_new (_llvm_builder.CreatePHI(ty, incoming_values, name)); } static EJS_NATIVE_FUNC(IRBuilder_createGlobalStringPtr) { diff --git a/ejs-llvm/phinode.cpp b/ejs-llvm/phinode.cpp new file mode 100644 index 00000000..dd6cf095 --- /dev/null +++ b/ejs-llvm/phinode.cpp @@ -0,0 +1,99 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +#include + +#include "ejs-llvm.h" +#include "ejs-object.h" +#include "ejs-function.h" +#include "ejs-string.h" + +#include "phinode.h" +#include "basicblock.h" +#include "value.h" + +namespace ejsllvm { + + /// phi nodes + + typedef struct { + /* object header */ + EJSObject obj; + + /* phi specific data */ + llvm::PHINode *llvm_phi; + } PhiNode; + + static EJSSpecOps _ejs_PhiNode_specops; + static ejsval _ejs_PhiNode_prototype EJSVAL_ALIGNMENT; + static ejsval _ejs_PhiNode EJSVAL_ALIGNMENT; + + static EJSObject* PhiNode_allocate() + { + return (EJSObject*)_ejs_gc_new(PhiNode); + } + + static EJS_NATIVE_FUNC(PhiNode_impl) { + EJS_NOT_IMPLEMENTED(); + } + + ejsval + PhiNode_new(llvm::PHINode* llvm_phi) + { + ejsval result = _ejs_object_new (_ejs_PhiNode_prototype, &_ejs_PhiNode_specops); + ((PhiNode*)EJSVAL_TO_OBJECT(result))->llvm_phi = llvm_phi; + return result; + } + + static EJS_NATIVE_FUNC(PhiNode_prototype_toString) { + std::string str; + llvm::raw_string_ostream str_ostream(str); + ((PhiNode*)EJSVAL_TO_OBJECT(*_this))->llvm_phi->print(str_ostream); + + return _ejs_string_new_utf8(trim(str_ostream.str()).c_str()); + } + + static EJS_NATIVE_FUNC(PhiNode_prototype_dump) { + // ((PhiNode*)EJSVAL_TO_OBJECT(*_this))->llvm_phi->dump(); + return _ejs_undefined; + } + + static EJS_NATIVE_FUNC(PhiNode_prototype_addIncoming) { + PhiNode *phi = ((PhiNode*)EJSVAL_TO_OBJECT(*_this)); + REQ_LLVM_VAL_ARG(0, incoming_val); + REQ_LLVM_BB_ARG(1, incoming_bb); + phi->llvm_phi->addIncoming(incoming_val, incoming_bb); + return _ejs_undefined; + } + + llvm::PHINode* + PhiNode_GetLLVMObj(ejsval val) + { + if (EJSVAL_IS_NULL(val)) return NULL; + return ((PhiNode*)EJSVAL_TO_OBJECT(val))->llvm_phi; + } + + void + PhiNode_init (ejsval exports) + { + _ejs_PhiNode_specops = _ejs_Object_specops; + _ejs_PhiNode_specops.class_name = "LLVMPhiNode"; + _ejs_PhiNode_specops.Allocate = PhiNode_allocate; + + _ejs_gc_add_root (&_ejs_PhiNode_prototype); + _ejs_PhiNode_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_PhiNode_specops); + + _ejs_PhiNode = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMPhiNode", (EJSClosureFunc)PhiNode_impl, _ejs_PhiNode_prototype); + + _ejs_object_setprop_utf8 (exports, "PhiNode", _ejs_PhiNode); + +#define PROTO_METHOD(x) EJS_INSTALL_ATOM_FUNCTION(_ejs_PhiNode_prototype, x, PhiNode_prototype_##x) + + PROTO_METHOD(dump); + PROTO_METHOD(toString); + PROTO_METHOD(addIncoming); + +#undef PROTO_METHOD + } +}; diff --git a/ejs-llvm/phinode.h b/ejs-llvm/phinode.h new file mode 100644 index 00000000..8ae1bc38 --- /dev/null +++ b/ejs-llvm/phinode.h @@ -0,0 +1,14 @@ +#ifndef EJS_LLVM_PHINODE_H +#define EJS_LLVM_PHINODE_H + +#include "ejs-llvm.h" + +namespace ejsllvm { + extern void PhiNode_init (ejsval exports); + + ejsval PhiNode_new(llvm::PHINode* llvm_phi); + + extern llvm::PHINode* PhiNode_GetLLVMObj(ejsval val); +}; + +#endif /* EJS_LLVM_PHINODE_H */ diff --git a/lib/compiler.js b/lib/compiler.js index 4983d392..ab699e8a 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -1372,7 +1372,13 @@ class LLVMIRVisitor extends TreeVisitor { let saved_function = this.currentFunction; if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); - let eir_fns = this.eir_emitter.emitModule(n.eir_module); + // candidates in one file share an EIR module; emit it exactly once + if (!this.eir_emitted) this.eir_emitted = new Map(); + let eir_fns = this.eir_emitted.get(n.eir_module); + if (!eir_fns) { + eir_fns = this.eir_emitter.emitModule(n.eir_module); + this.eir_emitted.set(n.eir_module, eir_fns); + } let target = eir_fns.get(n.eir_main); let ir_func = n.ir_func; @@ -3515,7 +3521,7 @@ export function compile(tree, base_output_filename, source_filename, module_info tree = insert_toplevel_func(tree, this_module_info); if (options.ir) { - let { lowered, fellback } = collectEIRFunctions(tree, source_filename); + let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos); debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); } diff --git a/lib/eir/emit.js b/lib/eir/emit.js index d800e3b2..11458bdd 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -400,6 +400,28 @@ export class EIREmitter { ); } + case "module_slot_load": { + // same shape as the legacy opencoded module slot access: + // a non-inbounds GEP into the imported module's global + // (see handleModuleSlotRef in compiler.js) + let module_global = this.v.import_module_globals.get(inst.imms.module); + if (!module_global) + throw new Error(`EIR emit: no module global for '${inst.imms.module}'`); + let mg = ir.createPointerCast( + module_global, + types.EjsModule.pointerTo(), + "" + ); + let slot_ref = ir.createGetElementPointer( + types.EjsModule, + mg, + [consts.int64(0), consts.int32(3), consts.int64(inst.imms.slot)], + "slot_ref" + ); + this.values.set(inst, ir.createLoad(types.EjsValue, slot_ref, "module_slot")); + return; + } + case "get_global": { let key = this.v.getAtom(String(inst.imms.atom)); return this.emitCallLike(inst, rt.global_getprop, [key], "getglobal"); diff --git a/lib/eir/errors.js b/lib/eir/errors.js index 416ae634..a4e73167 100644 --- a/lib/eir/errors.js +++ b/lib/eir/errors.js @@ -5,10 +5,21 @@ // thrown by scope analysis / lowering when a construct is outside the // currently-supported subset; callers catch it and fall back to the legacy // code path for that function. -export class LowerNotSupported extends Error { - constructor(what, loc) { - let locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; - super(`EIR lowering does not support ${what}${locstr}`); - this.what = what; - } +// +// deliberately NOT a class: constructing an imported subclass of Error +// trips an IsConstructor assert when the compiler itself is compiled by +// the legacy pipeline (a latent legacy bug, still to be tracked down), so +// the fallback signal is a plain Error with a marker property, tested via +// isLowerNotSupported(). + +export function LowerNotSupported(what, loc) { + let locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; + let e = new Error(`EIR lowering does not support ${what}${locstr}`); + e.eir_lower_not_supported = true; + e.what = what; + return e; +} + +export function isLowerNotSupported(e) { + return e && e.eir_lower_not_supported === true; } diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 23c68b16..b69721ee 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -5,23 +5,29 @@ // --ir integration: pick the functions the EIR pipeline can own, lower and // verify them, and tag their AST nodes for the legacy pipeline to skip. // -// v1 candidate rules (each one is a fallback, not a failure): -// - top-level FunctionDeclarations only; -// - the whole subtree must lower (LowerNotSupported falls back); -// - the subtree must be closed: no references to module-scope bindings -// (imports, other top-level functions/vars) -- only true globals. -// module-scope access needs env/module-slot interop with the legacy -// pipeline, which comes later. +// candidates are top-level FunctionDeclarations. a candidate's free names +// may be: +// - true globals (console, Math, ...): lowered as get_global; +// - named imports from non-native modules: lowered as module_slot_load +// (or folded, when the export is a const literal); +// - sibling candidates, in call position only: lowered as direct calls +// into the EIR-emitted function (no closure dispatch). viability is +// a fixed point: a candidate depending on a fallen-back sibling falls +// back too. +// anything else (module-level vars, namespace/default imports, siblings +// used as values, unsupported syntax) falls back per function via +// LowerNotSupported. // -// Tagged nodes keep their (emptied) body through the legacy passes; the -// legacy visitFunction emits a forwarding thunk to the EIR-emitted -// function instead of a body (see compiler.js). +// all of a file's candidates lower into ONE shared EIR module so direct +// calls resolve within it; tagged nodes keep their (emptied) body through +// the legacy passes, and the legacy visitFunction emits a forwarding +// thunk to the EIR-emitted function (see compiler.js). import * as b from "../ast-builder"; import * as debug from "../debug"; import { ScopeAnalysis } from "./scopes"; import { lowerAnalyzedFunction } from "./lower"; -import { LowerNotSupported } from "./errors"; +import { LowerNotSupported, isLowerNotSupported } from "./errors"; import { Module } from "./ir"; import { verifyModule } from "./verifier"; @@ -70,56 +76,165 @@ function collectModuleScopeNames(toplevelBody) { return names; } +// local name -> { module, slot, constval? } for named imports from +// non-native modules +function collectImports(toplevelBody, module_infos) { + let imports = new Map(); + if (!module_infos) return imports; + for (let stmt of toplevelBody) { + if (stmt.type !== b.ImportDeclaration) continue; + if (!stmt.source_path) continue; + let moduleString = stmt.source_path.value; + if (moduleString[0] === "@") continue; // native modules resolve differently + let module_info = module_infos.get(moduleString); + if (!module_info || module_info.isNative()) continue; + for (let spec of stmt.specifiers) { + if (spec.type !== b.ImportSpecifier) continue; // default/namespace fall back + if (!module_info.exports.has(spec.imported.name)) continue; + let export_info = module_info.exports.get(spec.imported.name); + let entry = { + module: moduleString, + slot: export_info.slot_num, + }; + // const exports fold to their literal at compile time (matches + // new-cc's constval propagation) + if (export_info.constval && export_info.constval.type === b.Literal) + entry.constval = export_info.constval; + imports.set(spec.local.name, entry); + } + } + return imports; +} + +// module-scope names that are ever assigned at the top level; calls into +// those can't be made direct +function collectAssignedNames(toplevelBody) { + let assigned = new Set(); + let walk = (n) => { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (let el of n) walk(el); + return; + } + // don't descend into functions: assignments there hit closures at + // runtime, which sibling-call viability doesn't depend on... but a + // nested assignment to a module fn name DOES invalidate direct + // calls, so we conservatively descend everywhere. + if (n.type === b.AssignmentExpression && n.left && n.left.type === b.Identifier) + assigned.add(n.left.name); + if (n.type === b.UpdateExpression && n.argument && n.argument.type === b.Identifier) + assigned.add(n.argument.name); + for (let k of Object.keys(n)) { + if (k === "loc") continue; + walk(n[k]); + } + }; + walk(toplevelBody); + return assigned; +} + // tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel // function). returns { lowered, fellback } counts. -export function collectEIRFunctions(tree, filename) { +export function collectEIRFunctions(tree, filename, module_infos) { let toplevel = tree.body[0]; - let moduleNames = collectModuleScopeNames(toplevel.body.body); + let body = toplevel.body.body; - let lowered = 0; - let fellback = 0; + let moduleNames = collectModuleScopeNames(body); + let imports = collectImports(body, module_infos); + let assigned = collectAssignedNames(body); - for (let stmt of toplevel.body.body) { + // phase 1: analyze every top-level function declaration + let candidates = new Map(); // name -> { stmt, analysis, info, viable, reason } + for (let stmt of body) { if (stmt.type !== b.FunctionDeclaration || !stmt.id) continue; - + let name = stmt.id.name; + if (candidates.has(name)) { + candidates.get(name).viable = false; + candidates.get(name).reason = "redeclared at module scope"; + continue; + } + let entry = { stmt: stmt, viable: true, reason: null }; + candidates.set(name, entry); + if (assigned.has(name)) { + entry.viable = false; + entry.reason = "reassigned at module scope"; + continue; + } try { - let analysis = new ScopeAnalysis(); - let info = analysis.analyzeFunction(stmt, stmt.id.name); + entry.analysis = new ScopeAnalysis(); + entry.info = entry.analysis.analyzeFunction(stmt, name); + } catch (e) { + if (!(isLowerNotSupported(e))) throw e; + entry.viable = false; + entry.reason = e.message; + } + } - // closed-subtree check: every free name must be a real global - let module_ref = null; - for (let name of analysis.globalNames) { - if (moduleNames.has(name)) { - module_ref = name; - break; - } - } - if (module_ref !== null) { - debug.log( - 1, - `EIR: ${filename}: '${stmt.id.name}' falls back (references module binding '${module_ref}')` - ); - fellback++; - continue; + // phase 2: viability fixed point over free names + let changed = true; + while (changed) { + changed = false; + for (let entry of candidates.values()) { + if (!entry.viable) continue; + for (let name of entry.analysis.globalNames) { + if (!moduleNames.has(name)) continue; // a real global + if (imports.has(name)) continue; // handled via module slots + let sib = candidates.get(name); + if ( + sib && + sib.viable && + sib !== entry && + !entry.analysis.globalValueNames.has(name) + ) + continue; // direct call to a viable sibling + entry.viable = false; + entry.reason = `references module binding '${name}'`; + changed = true; + break; } + } + } - let eir_module = new Module(info.name); - lowerAnalyzedFunction(info, analysis, eir_module); - verifyModule(eir_module); + // phase 3: lower every viable candidate into one shared module + let eir_module = new Module(filename); + let siblings = new Map(); // local name -> eir function name + for (let entry of candidates.values()) { + if (entry.viable) siblings.set(entry.stmt.id.name, entry.info.name); + } + let mod_ctx = { imports: imports, siblings: siblings }; - stmt.eir_module = eir_module; - stmt.eir_main = info.name; - // the legacy pipeline still visits this node (and emits the - // forwarding thunk); it doesn't need the body. - stmt.body = { type: b.BlockStatement, body: [], loc: stmt.loc }; - lowered++; - debug.log(1, `EIR: ${filename}: '${stmt.id.name}' lowered (${eir_module.functions.length} fns)`); + let fellback = 0; + let succeeded = []; + for (let entry of candidates.values()) { + if (!entry.viable) { + if (entry.reason) { + debug.log(1, `EIR: ${filename}: '${entry.stmt.id.name}' falls back (${entry.reason})`); + fellback++; + } + continue; + } + try { + lowerAnalyzedFunction(entry.info, entry.analysis, eir_module, mod_ctx); + succeeded.push(entry); } catch (e) { - if (!(e instanceof LowerNotSupported)) throw e; - debug.log(1, `EIR: ${filename}: '${stmt.id.name}' falls back (${e.message})`); - fellback++; + if (!(isLowerNotSupported(e))) throw e; + // lowering found something analysis didn't model. siblings may + // hold direct-call references into this function, so the whole + // file's EIR set is abandoned (nothing has been tagged yet). + debug.log(1, `EIR: ${filename}: '${entry.stmt.id.name}' failed late (${e.message}); disabling EIR for this file`); + return { lowered: 0, fellback: candidates.size }; } } - return { lowered: lowered, fellback: fellback }; + if (succeeded.length > 0) verifyModule(eir_module); + + // only now (everything lowered + verified) tag nodes and empty bodies + for (let entry of succeeded) { + entry.stmt.eir_module = eir_module; + entry.stmt.eir_main = entry.info.name; + entry.stmt.body = { type: b.BlockStatement, body: [], loc: entry.stmt.loc }; + debug.log(1, `EIR: ${filename}: '${entry.stmt.id.name}' lowered`); + } + + return { lowered: succeeded.length, fellback: fellback }; } diff --git a/lib/eir/lower.js b/lib/eir/lower.js index f463ee02..e2dbd91b 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -29,9 +29,7 @@ import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; import { Module } from "./ir"; import { ScopeAnalysis } from "./scopes"; -import { LowerNotSupported } from "./errors"; - -export { LowerNotSupported }; +import { LowerNotSupported, isLowerNotSupported } from "./errors"; const binops = { "+": "add", @@ -58,10 +56,13 @@ const binops = { }; class LowerFunction { - constructor(info, analysis, module) { + constructor(info, analysis, module, mod_ctx) { this.info = info; // FnInfo from scope analysis this.analysis = analysis; this.module = module; + // module-scope interop: imports (name -> {module, slot, constval}) + // and sibling top-level EIR functions callable directly + this.mod_ctx = mod_ctx || { imports: new Map(), siblings: new Map() }; let paramNames = info.params.map((p) => p.uid); this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); @@ -191,14 +192,14 @@ class LowerFunction { let values = []; for (let p of n.properties) { if (p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal)) - throw new LowerNotSupported("computed object key", n.loc); + throw LowerNotSupported("computed object key", n.loc); keys.push(p.key.type === b.Identifier ? p.key.name : String(p.key.value)); values.push(this.expr(p.value)); } return this.b.emit("make_object", values, { keys: keys }); } default: - throw new LowerNotSupported(`expression type ${n.type}`, n.loc); + throw LowerNotSupported(`expression type ${n.type}`, n.loc); } } @@ -212,30 +213,44 @@ class LowerFunction { case "boolean": return this.b.constBool(n.value); default: - throw new LowerNotSupported(`literal ${typeof n.value}`, n.loc); + throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); } } identifier(n) { if (n.name === "undefined") return this.b.constUndefined(); let binding = this.analysis.resolve(n); - if (binding === null || binding === undefined) + if (binding === null || binding === undefined) { + let imp = this.mod_ctx.imports.get(n.name); + if (imp) { + if (imp.constval !== undefined) return this.literal(imp.constval); + return this.b.emit("module_slot_load", [], { + module: imp.module, + slot: imp.slot, + }); + } + if (this.mod_ctx.siblings.has(n.name)) + throw LowerNotSupported( + `module function '${n.name}' used as a value`, + n.loc + ); return this.b.emit("get_global", [], { atom: n.name }); + } if (binding.kind === "self") - throw new LowerNotSupported("function self-reference as a value", n.loc); + throw LowerNotSupported("function self-reference as a value", n.loc); return this.readBinding(binding); } functionExpr(n) { let childInfo = this.analysis.infoFor(n); if (!childInfo) throw new Error("EIR lowering: unanalyzed function expression"); - lowerOneFunction(childInfo, this.analysis, this.module); + lowerOneFunction(childInfo, this.analysis, this.module, this.mod_ctx); return this.b.emit("make_closure", [this.curEnv], { fn: childInfo.name }); } binary(n) { let op = binops[n.operator]; - if (!op) throw new LowerNotSupported(`binary operator ${n.operator}`, n.loc); + if (!op) throw LowerNotSupported(`binary operator ${n.operator}`, n.loc); let l = this.expr(n.left); let r = this.expr(n.right); return this.b.emit(op, [l, r], {}); @@ -251,7 +266,7 @@ class LowerFunction { if (n.operator === "&&") this.b.condBr(lbool, rhs_bb, [], join_bb, [l]); else if (n.operator === "||") this.b.condBr(lbool, join_bb, [l], rhs_bb, []); - else throw new LowerNotSupported(`logical operator ${n.operator}`, n.loc); + else throw LowerNotSupported(`logical operator ${n.operator}`, n.loc); this.b.sealBlock(rhs_bb); this.b.setInsertPoint(rhs_bb); @@ -282,13 +297,13 @@ class LowerFunction { arg = this.expr(n.argument); return this.b.emit("typeof", [arg], {}); default: - throw new LowerNotSupported(`unary operator ${n.operator}`, n.loc); + throw LowerNotSupported(`unary operator ${n.operator}`, n.loc); } } assignment(n) { if (n.operator !== "=") - throw new LowerNotSupported(`assignment operator ${n.operator}`, n.loc); + throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); if (n.left.type === b.Identifier) { let binding = this.analysis.resolve(n.left); let v = this.expr(n.right); @@ -310,7 +325,7 @@ class LowerFunction { } return v; } - throw new LowerNotSupported(`assignment target ${n.left.type}`, n.loc); + throw LowerNotSupported(`assignment target ${n.left.type}`, n.loc); } member(n) { @@ -334,8 +349,8 @@ class LowerFunction { callee = this.b.emit("get_prop", [thisArg, key], {}); } } else { - // direct recursion: call the current function without closure - // dispatch, forwarding our own env + // direct calls: recursion through the self binding, and calls + // to sibling top-level EIR functions, skip closure dispatch if (n.callee.type === b.Identifier) { let binding = this.analysis.resolve(n.callee); if (binding && binding.kind === "self" && binding.fnInfo === this.info) { @@ -345,6 +360,16 @@ class LowerFunction { direct: this.info.name, }); } + if ( + (binding === null || binding === undefined) && + this.mod_ctx.siblings.has(n.callee.name) + ) { + let dthis = this.b.constUndefined(); + let dargs = n.arguments.map((a) => this.expr(a)); + return this.b.emit("call", [this.envParam, dthis].concat(dargs), { + direct: this.mod_ctx.siblings.get(n.callee.name), + }); + } } callee = this.expr(n.callee); thisArg = this.b.constUndefined(); @@ -398,7 +423,7 @@ class LowerFunction { case b.VariableDeclaration: for (let d of n.declarations) { if (d.id.type !== b.Identifier) - throw new LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); + throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); let init = d.init ? this.expr(d.init) : this.b.constUndefined(); let binding = this.analysis.resolve(d.id); this.writeBinding(binding, init); @@ -406,7 +431,7 @@ class LowerFunction { return; case b.FunctionDeclaration: // closure was created (hoisted) at entry; lower the body now - lowerOneFunction(this.analysis.infoFor(n), this.analysis, this.module); + lowerOneFunction(this.analysis.infoFor(n), this.analysis, this.module, this.mod_ctx); return; case b.ExpressionStatement: this.expr(n.expression); @@ -429,20 +454,20 @@ class LowerFunction { return this.tryStmt(n); case b.BreakStatement: { if (n.label || this.loops.length === 0) - throw new LowerNotSupported("break outside plain loop", n.loc); + throw LowerNotSupported("break outside plain loop", n.loc); this.b.br(this.loops[this.loops.length - 1].breakTarget, []); return; } case b.ContinueStatement: { if (n.label || this.loops.length === 0) - throw new LowerNotSupported("continue outside plain loop", n.loc); + throw LowerNotSupported("continue outside plain loop", n.loc); this.b.br(this.loops[this.loops.length - 1].continueTarget, []); return; } case b.EmptyStatement: return; default: - throw new LowerNotSupported(`statement type ${n.type}`, n.loc); + throw LowerNotSupported(`statement type ${n.type}`, n.loc); } } @@ -586,21 +611,21 @@ class LowerFunction { // lower one analyzed function (and, transitively, function declarations / // expressions inside it) into `module`. -export function lowerAnalyzedFunction(info, analysis, module) { - return lowerOneFunction(info, analysis, module); +export function lowerAnalyzedFunction(info, analysis, module, mod_ctx) { + return lowerOneFunction(info, analysis, module, mod_ctx); } -function lowerOneFunction(info, analysis, module) { +function lowerOneFunction(info, analysis, module, mod_ctx) { if (info.lowered) return info.fn; info.lowered = true; - let lf = new LowerFunction(info, analysis, module); + let lf = new LowerFunction(info, analysis, module, mod_ctx); lf.stmt(info.node.body); info.fn = lf.finish(); module.addFunction(info.fn); // hoisted closures may reference children whose declaration statement // was never reached (e.g. behind an early return); every child still // needs a body in the module. - for (let child of info.children) lowerOneFunction(child, analysis, module); + for (let child of info.children) lowerOneFunction(child, analysis, module, mod_ctx); return info.fn; } diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 76733704..6c7dd7c9 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -19,7 +19,7 @@ // either lowers completely or falls back to the legacy path as a unit. import * as b from "../ast-builder"; -import { LowerNotSupported } from "./errors"; +import { LowerNotSupported, isLowerNotSupported } from "./errors"; let binding_id_gen = 0; @@ -81,6 +81,7 @@ export class ScopeAnalysis { this.refs = new Map(); // Identifier node -> Binding | null (global) this.fnInfos = new Map(); // Function node -> FnInfo this.globalNames = new Set(); // free names that resolved to nothing + this.globalValueNames = new Set(); // free names used other than as a direct callee this.anon_gen = 0; this.curScope = null; this.curFn = null; @@ -130,18 +131,18 @@ export class ScopeAnalysis { this.fnInfos.set(fnNode, info); if (fnNode.defaults && fnNode.defaults.some((d) => d)) - throw new LowerNotSupported("default parameters", fnNode.loc); + throw LowerNotSupported("default parameters", fnNode.loc); if (fnNode.rest) - throw new LowerNotSupported("rest parameter", fnNode.loc); + throw LowerNotSupported("rest parameter", fnNode.loc); if (fnNode.generator) - throw new LowerNotSupported("generator function", fnNode.loc); + throw LowerNotSupported("generator function", fnNode.loc); this.curFn = info; this.curScope = new LexScope(this.curScope, info); this.curScope.isFnTop = true; for (let p of fnNode.params) { if (p.type !== b.Identifier) - throw new LowerNotSupported(`param pattern ${p.type}`, fnNode.loc); + throw LowerNotSupported(`param pattern ${p.type}`, fnNode.loc); let binding = this.curScope.declare(p.name, "param"); info.params.push(binding); } @@ -153,17 +154,18 @@ export class ScopeAnalysis { this.curFn = this.curFn.parent; } - reference(idNode) { + reference(idNode, isCallee) { if (idNode.name === "undefined") { this.refs.set(idNode, null); return; } if (idNode.name === "arguments") - throw new LowerNotSupported("the arguments object", idNode.loc); + throw LowerNotSupported("the arguments object", idNode.loc); let binding = this.curScope.lookup(idNode.name); this.refs.set(idNode, binding); // null = global if (!binding) { this.globalNames.add(idNode.name); + if (!isCallee) this.globalValueNames.add(idNode.name); return; } @@ -171,7 +173,7 @@ export class ScopeAnalysis { // only direct recursion from the function itself is supported; // a nested function would need the closure value in its env. if (binding.fnInfo !== this.curFn) - throw new LowerNotSupported("self-reference from a nested function", idNode.loc); + throw LowerNotSupported("self-reference from a nested function", idNode.loc); return; } @@ -200,7 +202,7 @@ export class ScopeAnalysis { case b.VariableDeclaration: for (let d of n.declarations) { if (d.id.type !== b.Identifier) - throw new LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); + throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); if (d.init) this.walkExpr(d.init); // declare after walking the init: `let x = x` refers outward. // var declarations hoist to the function scope; only @@ -214,11 +216,11 @@ export class ScopeAnalysis { } return; case b.FunctionDeclaration: { - if (!n.id) throw new LowerNotSupported("unnamed function declaration", n.loc); + if (!n.id) throw LowerNotSupported("unnamed function declaration", n.loc); if (!this.curScope.isFnTop) - throw new LowerNotSupported("block-level function declaration", n.loc); + throw LowerNotSupported("block-level function declaration", n.loc); if (this.curScope.names.has(n.id.name)) - throw new LowerNotSupported( + throw LowerNotSupported( `redeclaration of function '${n.id.name}'`, n.loc ); @@ -266,15 +268,15 @@ export class ScopeAnalysis { return; case b.TryStatement: { if (n.finalizer) - throw new LowerNotSupported("try/finally (desugar it first)", n.loc); + throw LowerNotSupported("try/finally (desugar it first)", n.loc); if (!n.handlers || n.handlers.length !== 1) - throw new LowerNotSupported("try without exactly one catch", n.loc); + throw LowerNotSupported("try without exactly one catch", n.loc); this.walkStmt(n.block); let handler = n.handlers[0]; this.curScope = new LexScope(this.curScope, this.curFn); if (handler.param) { if (handler.param.type !== b.Identifier) - throw new LowerNotSupported("catch parameter pattern", n.loc); + throw LowerNotSupported("catch parameter pattern", n.loc); let binding = this.curScope.declare(handler.param.name, "catch"); this.refs.set(handler.param, binding); } @@ -284,12 +286,12 @@ export class ScopeAnalysis { } case b.BreakStatement: case b.ContinueStatement: - if (n.label) throw new LowerNotSupported("labeled break/continue", n.loc); + if (n.label) throw LowerNotSupported("labeled break/continue", n.loc); return; case b.EmptyStatement: return; default: - throw new LowerNotSupported(`statement type ${n.type}`, n.loc); + throw LowerNotSupported(`statement type ${n.type}`, n.loc); } } @@ -316,6 +318,10 @@ export class ScopeAnalysis { this.walkExpr(n.right); return; case b.CallExpression: + if (n.callee.type === b.Identifier) this.reference(n.callee, true); + else this.walkExpr(n.callee); + for (let a of n.arguments) this.walkExpr(a); + return; case b.NewExpression: this.walkExpr(n.callee); for (let a of n.arguments) this.walkExpr(a); @@ -351,7 +357,7 @@ export class ScopeAnalysis { } return; default: - throw new LowerNotSupported(`expression type ${n.type}`, n.loc); + throw LowerNotSupported(`expression type ${n.type}`, n.loc); } } } diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 93fe14fb..944905dc 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -10,7 +10,8 @@ import { FunctionBuilder } from "./builder"; import { printFunction, printModule } from "./printer"; import { verifyFunction, verifyModule } from "./verifier"; -import { lowerFunctionNode, lowerProgram, LowerNotSupported } from "./lower"; +import { lowerFunctionNode, lowerProgram } from "./lower"; +import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst } from "./ir"; import * as esprima from "../../external-deps/esprima/esprima-es6"; @@ -308,7 +309,7 @@ test("lower: unsupported constructs raise LowerNotSupported", () => { try { lowerFunctionNode(parseFn("function t(x) { for (let k in x) { } }")); } catch (e) { - threw = e instanceof LowerNotSupported; + threw = isLowerNotSupported(e); } assert(threw, "expected LowerNotSupported"); }); From c861e2e6215e26e7d9379d0e6195413e99fbadc4 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 20:41:20 -0700 Subject: [PATCH 021/146] fix two legacy middle-end bugs found while self-hosting the eir sources - DesugarTemplates never visited a template's substitution expressions (nor a tagged template's tag), so a template literal nested inside another template's ${} -- e.g. through an arrow in a .map call -- survived the pass undesugared and crashed codegen - new-cc registered a module-slot binding for every %moduleSetSlot at the toplevel, so a re-export (`export { X }` where X is an import) shadowed the imported binding: every reference to X, including the setSlot's own right-hand side, read this module's uninitialized slot instead of the import. the binding is now only registered when the name isn't already bound to another module's slot regression tests: template-nested1, reexport1 (with two helper modules exercising import -> re-export -> use-in-callee). Co-Authored-By: Claude Fable 5 --- lib/passes/desugar-templates.js | 10 +++++++++- lib/passes/new-cc.js | 10 +++++++++- test/expected/reexport1.js.expected-out | 3 +++ test/expected/template-nested1.js.expected-out | 2 ++ test/reexport1-lib.js | 2 ++ test/reexport1.js | 5 +++++ test/reexport2-mid.js | 3 +++ test/template-nested1.js | 6 ++++++ 8 files changed, 39 insertions(+), 2 deletions(-) create mode 100644 test/expected/reexport1.js.expected-out create mode 100644 test/expected/template-nested1.js.expected-out create mode 100644 test/reexport1-lib.js create mode 100644 test/reexport1.js create mode 100644 test/reexport2-mid.js create mode 100644 test/template-nested1.js diff --git a/lib/passes/desugar-templates.js b/lib/passes/desugar-templates.js index a94ced08..2181f4c7 100644 --- a/lib/passes/desugar-templates.js +++ b/lib/passes/desugar-templates.js @@ -64,6 +64,12 @@ export class DesugarTemplates extends TransformPass { } visitTaggedTemplateExpression(n, callsites) { + // visit the tag and the substitution expressions first: they can + // contain templates of their own (e.g. inside arrow functions), + // which would otherwise survive this pass undesugared. + n.tag = this.visit(n.tag); + n.quasi.expressions = n.quasi.expressions.map((e) => this.visit(e)); + let callsiteid_func_id = freshCallsiteId(); let callsite_func = this.generateCreateCallsiteIdFunc( callsiteid_func_id, @@ -76,8 +82,10 @@ export class DesugarTemplates extends TransformPass { } visitTemplateLiteral(n) { + // see visitTaggedTemplateExpression: substitutions must be visited + let expressions = n.expressions.map((e) => this.visit(e)); let cooked = b.arrayExpression(n.quasis.map((q) => b.literal(q.value.cooked))); - let substitutions = b.arrayExpression(n.expressions); + let substitutions = b.arrayExpression(expressions); return intrinsic(templateDefaultHandlerCall_id, [cooked, substitutions]); } } diff --git a/lib/passes/new-cc.js b/lib/passes/new-cc.js index 4d72e000..9fd338ad 100644 --- a/lib/passes/new-cc.js +++ b/lib/passes/new-cc.js @@ -674,7 +674,15 @@ class CollectScopeNestingInfo extends TransformPass { is_intrinsic(s.expression, "%moduleSetSlot") ) { let args = s.expression.arguments; - for_scope.addBinding(new ModuleSlotBinding(args[0], args[1], args[1].value)); + // a re-export (`export { X }` where X is an import) emits a + // moduleSetSlot whose name is already bound to the imported + // module's slot. registering our own module's binding over + // it would make every reference to X -- including the + // setSlot's own right-hand side -- read our uninitialized + // slot instead of the import. + let existing = for_scope.getBinding(args[1].value); + if (!(existing && existing.type === "module")) + for_scope.addBinding(new ModuleSlotBinding(args[0], args[1], args[1].value)); } } } diff --git a/test/expected/reexport1.js.expected-out b/test/expected/reexport1.js.expected-out new file mode 100644 index 00000000..a555d6f1 --- /dev/null +++ b/test/expected/reexport1.js.expected-out @@ -0,0 +1,3 @@ +hi! +3 +yo!! diff --git a/test/expected/template-nested1.js.expected-out b/test/expected/template-nested1.js.expected-out new file mode 100644 index 00000000..7ab9ac8e --- /dev/null +++ b/test/expected/template-nested1.js.expected-out @@ -0,0 +1,2 @@ +(a!, b!) +xy2zw diff --git a/test/reexport1-lib.js b/test/reexport1-lib.js new file mode 100644 index 00000000..184a641b --- /dev/null +++ b/test/reexport1-lib.js @@ -0,0 +1,2 @@ +export function shout(s) { return s + "!"; } +export const LEVEL = 3; diff --git a/test/reexport1.js b/test/reexport1.js new file mode 100644 index 00000000..2c720afe --- /dev/null +++ b/test/reexport1.js @@ -0,0 +1,5 @@ +// generator: none +import { shout, LEVEL, twice } from "./reexport2-mid"; +console.log(shout("hi")); +console.log(LEVEL); +console.log(twice("yo")); diff --git a/test/reexport2-mid.js b/test/reexport2-mid.js new file mode 100644 index 00000000..ba4544f8 --- /dev/null +++ b/test/reexport2-mid.js @@ -0,0 +1,3 @@ +import { shout, LEVEL } from "./reexport1-lib"; +export { shout, LEVEL }; +export function twice(s) { return shout(shout(s)); } diff --git a/test/template-nested1.js b/test/template-nested1.js new file mode 100644 index 00000000..bc032cb2 --- /dev/null +++ b/test/template-nested1.js @@ -0,0 +1,6 @@ +// generator: none +function f(xs) { + return `(${xs.map((p) => `${p}!`).join(", ")})`; +} +console.log(f(["a", "b"])); +console.log(`x${`y${1 + 1}z`}w`); From 6abd1321f85f7d5742644752f6d5808d2a6f74e6 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 21:41:54 -0700 Subject: [PATCH 022/146] eir: module-level interop + broader --ir candidates - self-module exported bindings resolve through module slots on a "%self" module global: reads via module_slot_load, writes via the new module_slot_store op (exported consts with literal initializers fold); - non-exported module-level bindings with primitive literal initializers that are never reassigned fold to their literal; - candidates now include exported function declarations and top-level single-declarator `var f = function () {}` initializers (the var name doubles as the self name, so anonymous fn-exprs self-recurse directly); - mod_ctx.imports generalized to mod_ctx.refs ({module, slot, constval?, writable}); scope analysis tracks free assigned names so writes to read-only refs fall back at analysis time; - more early fallback guards (compound assignment, value-position self references, regex/object literals incl. constval folds) so lowering can't fail late and abandon a whole file's EIR set. self-hosted --ir coverage: 50 functions (was 41), 0 late failures. //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,stage3} green (375 pass / 26 xfail); stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- lib/compiler.js | 2 +- lib/eir/emit.js | 42 ++-- lib/eir/integrate.js | 219 +++++++++++++++------ lib/eir/lower.js | 43 +++- lib/eir/scopes.js | 39 +++- test/eir-interop1-lib.js | 29 +++ test/eir-interop1.js | 10 + test/expected/eir-interop1.js.expected-out | 7 + 8 files changed, 294 insertions(+), 97 deletions(-) create mode 100644 test/eir-interop1-lib.js create mode 100644 test/eir-interop1.js create mode 100644 test/expected/eir-interop1.js.expected-out diff --git a/lib/compiler.js b/lib/compiler.js index ab699e8a..d7e657bb 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -3521,7 +3521,7 @@ export function compile(tree, base_output_filename, source_filename, module_info tree = insert_toplevel_func(tree, this_module_info); if (options.ir) { - let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos); + let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info); debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); } diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 11458bdd..09bbed77 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -257,6 +257,24 @@ export class EIREmitter { return this.abi.createCall(this.llvmFn, callee.type, callee, argv, name || ""); } + // same shape as the legacy opencoded module slot access: a non-inbounds + // GEP into the module global (see handleModuleSlotRef in compiler.js). + // "%self" refers to the module being compiled. + moduleSlotRef(moduleString, slot) { + let module_global; + if (moduleString === "%self") module_global = this.v.this_module_global; + else module_global = this.v.import_module_globals.get(moduleString); + if (!module_global) + throw new Error(`EIR emit: no module global for '${moduleString}'`); + let mg = ir.createPointerCast(module_global, types.EjsModule.pointerTo(), ""); + return ir.createGetElementPointer( + types.EjsModule, + mg, + [consts.int64(0), consts.int32(3), consts.int64(slot)], + "slot_ref" + ); + } + // spill values into the scratch area, returning an EjsValue* to its start spillArgs(values) { for (let i = 0; i < values.length; i++) { @@ -401,26 +419,16 @@ export class EIREmitter { } case "module_slot_load": { - // same shape as the legacy opencoded module slot access: - // a non-inbounds GEP into the imported module's global - // (see handleModuleSlotRef in compiler.js) - let module_global = this.v.import_module_globals.get(inst.imms.module); - if (!module_global) - throw new Error(`EIR emit: no module global for '${inst.imms.module}'`); - let mg = ir.createPointerCast( - module_global, - types.EjsModule.pointerTo(), - "" - ); - let slot_ref = ir.createGetElementPointer( - types.EjsModule, - mg, - [consts.int64(0), consts.int32(3), consts.int64(inst.imms.slot)], - "slot_ref" - ); + let slot_ref = this.moduleSlotRef(inst.imms.module, inst.imms.slot); this.values.set(inst, ir.createLoad(types.EjsValue, slot_ref, "module_slot")); return; } + case "module_slot_store": { + let slot_ref = this.moduleSlotRef(inst.imms.module, inst.imms.slot); + ir.createStore(this.val(inst.operands[0]), slot_ref); + this.values.set(inst, this.val(inst.operands[0])); + return; + } case "get_global": { let key = this.v.getAtom(String(inst.imms.atom)); diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index b69721ee..3bf4bd0e 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -5,18 +5,23 @@ // --ir integration: pick the functions the EIR pipeline can own, lower and // verify them, and tag their AST nodes for the legacy pipeline to skip. // -// candidates are top-level FunctionDeclarations. a candidate's free names -// may be: +// candidates are top-level function declarations (exported or not) and +// top-level single-declarator `var f = function () {}` initializers whose +// name is never reassigned. a candidate's free names may be: // - true globals (console, Math, ...): lowered as get_global; // - named imports from non-native modules: lowered as module_slot_load // (or folded, when the export is a const literal); +// - this module's own exported bindings: module_slot_load/store against +// the "%self" module global (const-literal exports fold); +// - non-exported module-level bindings with literal initializers that +// are never reassigned: folded to the literal; // - sibling candidates, in call position only: lowered as direct calls // into the EIR-emitted function (no closure dispatch). viability is // a fixed point: a candidate depending on a fallen-back sibling falls // back too. -// anything else (module-level vars, namespace/default imports, siblings -// used as values, unsupported syntax) falls back per function via -// LowerNotSupported. +// anything else (non-exported mutable module vars, namespace/default +// imports, siblings used as values, unsupported syntax) falls back per +// function via LowerNotSupported. // // all of a file's candidates lower into ONE shared EIR module so direct // calls resolve within it; tagged nodes keep their (emptied) body through @@ -51,10 +56,18 @@ function collectPatternNames(pat, out) { } } +// module-scope statements may be wrapped in `export` +function unwrapExport(stmt) { + if (stmt.type === b.ExportNamedDeclaration && stmt.declaration && !Array.isArray(stmt.declaration)) + return stmt.declaration; + return stmt; +} + // names bound at module scope (anything that is NOT a real global) function collectModuleScopeNames(toplevelBody) { let names = new Set(); - for (let stmt of toplevelBody) { + for (let wrapped of toplevelBody) { + let stmt = unwrapExport(wrapped); switch (stmt.type) { case b.FunctionDeclaration: case b.ClassDeclaration: @@ -76,38 +89,94 @@ function collectModuleScopeNames(toplevelBody) { return names; } -// local name -> { module, slot, constval? } for named imports from -// non-native modules -function collectImports(toplevelBody, module_infos) { - let imports = new Map(); - if (!module_infos) return imports; +// only primitive literals fold; regex literals are objects and need +// runtime construction +function isFoldableLiteral(n) { + return n && n.type === b.Literal && (n.value === null || typeof n.value !== "object"); +} + +// the module-slot reference map: local name -> { module, slot, constval?, +// writable }. covers named imports and this module's own exported +// bindings. +function collectModuleRefs(toplevelBody, module_infos, this_module_info) { + let refs = new Map(); + + // named imports from non-native modules + if (module_infos) { + for (let stmt of toplevelBody) { + if (stmt.type !== b.ImportDeclaration) continue; + if (!stmt.source_path) continue; + let moduleString = stmt.source_path.value; + if (moduleString[0] === "@") continue; // native modules resolve differently + let module_info = module_infos.get(moduleString); + if (!module_info || module_info.isNative()) continue; + for (let spec of stmt.specifiers) { + if (spec.type !== b.ImportSpecifier) continue; // default/namespace fall back + if (!module_info.exports.has(spec.imported.name)) continue; + let export_info = module_info.exports.get(spec.imported.name); + let entry = { + module: moduleString, + slot: export_info.slot_num, + writable: false, + }; + // const exports fold to their literal at compile time + // (matches new-cc's constval propagation) + if (isFoldableLiteral(export_info.constval)) + entry.constval = export_info.constval; + refs.set(spec.local.name, entry); + } + } + } + + // this module's own exported let/var/const bindings, via the "%self" + // module global. only declaration-form exports resolve this way; + // specifier-only exports (`export { X }`) alias another binding whose + // own resolution stands. exported names shadow same-named imports, + // so these are set second. + if (this_module_info) { + for (let wrapped of toplevelBody) { + if (wrapped.type !== b.ExportNamedDeclaration) continue; + let decl = wrapped.declaration; + if (!decl || Array.isArray(decl) || decl.type !== b.VariableDeclaration) continue; + let is_const = decl.kind === "const"; + for (let d of decl.declarations) { + if (d.id.type !== b.Identifier) continue; + if (!this_module_info.exports.has(d.id.name)) continue; + let export_info = this_module_info.exports.get(d.id.name); + let entry = { + module: "%self", + slot: export_info.slot_num, + writable: !is_const, + }; + if (is_const && isFoldableLiteral(export_info.constval)) { + entry.constval = export_info.constval; + entry.writable = false; + } + refs.set(d.id.name, entry); + } + } + } + + return refs; +} + +// non-exported module-level bindings with literal initializers that are +// never reassigned: fold-only refs (no slot) +function addModuleConstLiterals(toplevelBody, assigned, refs) { for (let stmt of toplevelBody) { - if (stmt.type !== b.ImportDeclaration) continue; - if (!stmt.source_path) continue; - let moduleString = stmt.source_path.value; - if (moduleString[0] === "@") continue; // native modules resolve differently - let module_info = module_infos.get(moduleString); - if (!module_info || module_info.isNative()) continue; - for (let spec of stmt.specifiers) { - if (spec.type !== b.ImportSpecifier) continue; // default/namespace fall back - if (!module_info.exports.has(spec.imported.name)) continue; - let export_info = module_info.exports.get(spec.imported.name); - let entry = { - module: moduleString, - slot: export_info.slot_num, - }; - // const exports fold to their literal at compile time (matches - // new-cc's constval propagation) - if (export_info.constval && export_info.constval.type === b.Literal) - entry.constval = export_info.constval; - imports.set(spec.local.name, entry); + if (stmt.type !== b.VariableDeclaration) continue; // exported ones already in refs + for (let d of stmt.declarations) { + if (d.id.type !== b.Identifier) continue; + if (!isFoldableLiteral(d.init)) continue; + if (assigned.has(d.id.name)) continue; + if (refs.has(d.id.name)) continue; + refs.set(d.id.name, { module: null, slot: -1, constval: d.init, writable: false }); } } - return imports; } // module-scope names that are ever assigned at the top level; calls into -// those can't be made direct +// those can't be made direct and their literals can't fold function collectAssignedNames(toplevelBody) { let assigned = new Set(); let walk = (n) => { @@ -116,10 +185,9 @@ function collectAssignedNames(toplevelBody) { for (let el of n) walk(el); return; } - // don't descend into functions: assignments there hit closures at - // runtime, which sibling-call viability doesn't depend on... but a - // nested assignment to a module fn name DOES invalidate direct - // calls, so we conservatively descend everywhere. + // conservatively descend everywhere, including into nested + // functions: a nested assignment to a module-scope name still + // invalidates direct calls / const folding. if (n.type === b.AssignmentExpression && n.left && n.left.type === b.Identifier) assigned.add(n.left.name); if (n.type === b.UpdateExpression && n.argument && n.argument.type === b.Identifier) @@ -133,36 +201,54 @@ function collectAssignedNames(toplevelBody) { return assigned; } +// the candidate function node + its module-scope name, or null +function candidateOf(wrapped) { + let stmt = unwrapExport(wrapped); + if (stmt.type === b.FunctionDeclaration && stmt.id) + return { name: stmt.id.name, fnNode: stmt }; + // var f = function () { ... }; (single declarator only) + if ( + stmt.type === b.VariableDeclaration && + stmt.declarations.length === 1 && + stmt.declarations[0].id.type === b.Identifier && + stmt.declarations[0].init && + stmt.declarations[0].init.type === b.FunctionExpression + ) + return { name: stmt.declarations[0].id.name, fnNode: stmt.declarations[0].init }; + return null; +} + // tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel // function). returns { lowered, fellback } counts. -export function collectEIRFunctions(tree, filename, module_infos) { +export function collectEIRFunctions(tree, filename, module_infos, this_module_info) { let toplevel = tree.body[0]; let body = toplevel.body.body; let moduleNames = collectModuleScopeNames(body); - let imports = collectImports(body, module_infos); let assigned = collectAssignedNames(body); + let refs = collectModuleRefs(body, module_infos, this_module_info); + addModuleConstLiterals(body, assigned, refs); - // phase 1: analyze every top-level function declaration - let candidates = new Map(); // name -> { stmt, analysis, info, viable, reason } - for (let stmt of body) { - if (stmt.type !== b.FunctionDeclaration || !stmt.id) continue; - let name = stmt.id.name; - if (candidates.has(name)) { - candidates.get(name).viable = false; - candidates.get(name).reason = "redeclared at module scope"; + // phase 1: analyze every candidate + let candidates = new Map(); // name -> { fnNode, analysis, info, viable, reason } + for (let wrapped of body) { + let cand = candidateOf(wrapped); + if (!cand) continue; + if (candidates.has(cand.name)) { + candidates.get(cand.name).viable = false; + candidates.get(cand.name).reason = "redeclared at module scope"; continue; } - let entry = { stmt: stmt, viable: true, reason: null }; - candidates.set(name, entry); - if (assigned.has(name)) { + let entry = { fnNode: cand.fnNode, name: cand.name, viable: true, reason: null }; + candidates.set(cand.name, entry); + if (assigned.has(cand.name)) { entry.viable = false; entry.reason = "reassigned at module scope"; continue; } try { entry.analysis = new ScopeAnalysis(); - entry.info = entry.analysis.analyzeFunction(stmt, name); + entry.info = entry.analysis.analyzeFunction(cand.fnNode, cand.name); } catch (e) { if (!(isLowerNotSupported(e))) throw e; entry.viable = false; @@ -178,7 +264,8 @@ export function collectEIRFunctions(tree, filename, module_infos) { if (!entry.viable) continue; for (let name of entry.analysis.globalNames) { if (!moduleNames.has(name)) continue; // a real global - if (imports.has(name)) continue; // handled via module slots + + // direct call to a viable sibling wins over any slot ref let sib = candidates.get(name); if ( sib && @@ -186,7 +273,19 @@ export function collectEIRFunctions(tree, filename, module_infos) { sib !== entry && !entry.analysis.globalValueNames.has(name) ) - continue; // direct call to a viable sibling + continue; + + let ref = refs.get(name); + if (ref) { + if (entry.analysis.globalAssignedNames.has(name) && !ref.writable) { + entry.viable = false; + entry.reason = `assigns read-only module binding '${name}'`; + changed = true; + break; + } + continue; // resolved via module slot / constant fold + } + entry.viable = false; entry.reason = `references module binding '${name}'`; changed = true; @@ -199,16 +298,16 @@ export function collectEIRFunctions(tree, filename, module_infos) { let eir_module = new Module(filename); let siblings = new Map(); // local name -> eir function name for (let entry of candidates.values()) { - if (entry.viable) siblings.set(entry.stmt.id.name, entry.info.name); + if (entry.viable) siblings.set(entry.name, entry.info.name); } - let mod_ctx = { imports: imports, siblings: siblings }; + let mod_ctx = { refs: refs, siblings: siblings }; let fellback = 0; let succeeded = []; for (let entry of candidates.values()) { if (!entry.viable) { if (entry.reason) { - debug.log(1, `EIR: ${filename}: '${entry.stmt.id.name}' falls back (${entry.reason})`); + debug.log(1, `EIR: ${filename}: '${entry.name}' falls back (${entry.reason})`); fellback++; } continue; @@ -221,7 +320,7 @@ export function collectEIRFunctions(tree, filename, module_infos) { // lowering found something analysis didn't model. siblings may // hold direct-call references into this function, so the whole // file's EIR set is abandoned (nothing has been tagged yet). - debug.log(1, `EIR: ${filename}: '${entry.stmt.id.name}' failed late (${e.message}); disabling EIR for this file`); + debug.log(1, `EIR: ${filename}: '${entry.name}' failed late (${e.message}); disabling EIR for this file`); return { lowered: 0, fellback: candidates.size }; } } @@ -230,10 +329,10 @@ export function collectEIRFunctions(tree, filename, module_infos) { // only now (everything lowered + verified) tag nodes and empty bodies for (let entry of succeeded) { - entry.stmt.eir_module = eir_module; - entry.stmt.eir_main = entry.info.name; - entry.stmt.body = { type: b.BlockStatement, body: [], loc: entry.stmt.loc }; - debug.log(1, `EIR: ${filename}: '${entry.stmt.id.name}' lowered`); + entry.fnNode.eir_module = eir_module; + entry.fnNode.eir_main = entry.info.name; + entry.fnNode.body = { type: b.BlockStatement, body: [], loc: entry.fnNode.loc }; + debug.log(1, `EIR: ${filename}: '${entry.name}' lowered`); } return { lowered: succeeded.length, fellback: fellback }; diff --git a/lib/eir/lower.js b/lib/eir/lower.js index e2dbd91b..b0bb1f4e 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -60,9 +60,10 @@ class LowerFunction { this.info = info; // FnInfo from scope analysis this.analysis = analysis; this.module = module; - // module-scope interop: imports (name -> {module, slot, constval}) + // module-scope interop: module-slot references (imports and this + // module's exports: name -> {module, slot, constval?, writable}) // and sibling top-level EIR functions callable directly - this.mod_ctx = mod_ctx || { imports: new Map(), siblings: new Map() }; + this.mod_ctx = mod_ctx || { refs: new Map(), siblings: new Map() }; let paramNames = info.params.map((p) => p.uid); this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); @@ -221,12 +222,12 @@ class LowerFunction { if (n.name === "undefined") return this.b.constUndefined(); let binding = this.analysis.resolve(n); if (binding === null || binding === undefined) { - let imp = this.mod_ctx.imports.get(n.name); - if (imp) { - if (imp.constval !== undefined) return this.literal(imp.constval); + let ref = this.mod_ctx.refs.get(n.name); + if (ref) { + if (ref.constval !== undefined) return this.literal(ref.constval); return this.b.emit("module_slot_load", [], { - module: imp.module, - slot: imp.slot, + module: ref.module, + slot: ref.slot, }); } if (this.mod_ctx.siblings.has(n.name)) @@ -306,10 +307,32 @@ class LowerFunction { throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); if (n.left.type === b.Identifier) { let binding = this.analysis.resolve(n.left); - let v = this.expr(n.right); - if (binding === null || binding === undefined) + if (binding === null || binding === undefined) { + let ref = this.mod_ctx.refs.get(n.left.name); + if (ref) { + if (!ref.writable) + throw LowerNotSupported( + `assignment to read-only module binding '${n.left.name}'`, + n.loc + ); + let v = this.expr(n.right); + this.b.emit("module_slot_store", [v], { + module: ref.module, + slot: ref.slot, + }); + return v; + } + if (this.mod_ctx.siblings.has(n.left.name)) + throw LowerNotSupported( + `assignment to module function '${n.left.name}'`, + n.loc + ); + let v = this.expr(n.right); this.b.emit("set_global", [v], { atom: n.left.name }); - else this.writeBinding(binding, v); + return v; + } + let v = this.expr(n.right); + this.writeBinding(binding, v); return v; } if (n.left.type === b.MemberExpression) { diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 6c7dd7c9..3051f0b8 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -82,6 +82,7 @@ export class ScopeAnalysis { this.fnInfos = new Map(); // Function node -> FnInfo this.globalNames = new Set(); // free names that resolved to nothing this.globalValueNames = new Set(); // free names used other than as a direct callee + this.globalAssignedNames = new Set(); // free names that are assigned to this.anon_gen = 0; this.curScope = null; this.curFn = null; @@ -110,11 +111,16 @@ export class ScopeAnalysis { // function expression) so recursion resolves to a "self" binding // instead of looking like a global; lowering turns calls through // it into direct calls. + // for an anonymous function-expression candidate (var f = + // function () {}), the module-scope name serves as the self name: + // integration only makes such a candidate viable when the name is + // never reassigned. + let selfName = (fnNode.id && fnNode.id.name) || name; let selfBinding = null; - if (fnNode.id && fnNode.id.name) { + if (selfName) { this.curScope = new LexScope(this.curScope, this.curFn); - selfBinding = new Binding(fnNode.id.name, "self", null); - this.curScope.names.set(fnNode.id.name, selfBinding); + selfBinding = new Binding(selfName, "self", null); + this.curScope.names.set(selfName, selfBinding); } let info = this.enterFunction(fnNode, name); if (selfBinding) selfBinding.fnInfo = info; @@ -157,7 +163,7 @@ export class ScopeAnalysis { reference(idNode, isCallee) { if (idNode.name === "undefined") { this.refs.set(idNode, null); - return; + return null; } if (idNode.name === "arguments") throw LowerNotSupported("the arguments object", idNode.loc); @@ -166,15 +172,18 @@ export class ScopeAnalysis { if (!binding) { this.globalNames.add(idNode.name); if (!isCallee) this.globalValueNames.add(idNode.name); - return; + return null; } if (binding.kind === "self") { // only direct recursion from the function itself is supported; - // a nested function would need the closure value in its env. + // a nested function would need the closure value in its env, + // and value-position uses would need the closure itself. if (binding.fnInfo !== this.curFn) throw LowerNotSupported("self-reference from a nested function", idNode.loc); - return; + if (!isCallee) + throw LowerNotSupported("function self-reference as a value", idNode.loc); + return binding; } if (binding.fnInfo !== this.curFn) { @@ -187,6 +196,7 @@ export class ScopeAnalysis { f = f.parent; } } + return binding; } // --- statements --------------------------------------------------------------- @@ -300,6 +310,10 @@ export class ScopeAnalysis { walkExpr(n) { switch (n.type) { case b.Literal: + // regex literals (and any other object-valued literal) + // aren't lowerable; reject here so we fall back early + if (n.value !== null && typeof n.value === "object") + throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); return; case b.Identifier: this.reference(n); @@ -313,8 +327,15 @@ export class ScopeAnalysis { this.walkExpr(n.argument); return; case b.AssignmentExpression: - if (n.left.type === b.Identifier) this.reference(n.left); - else this.walkExpr(n.left); + // lowering only handles simple assignment; reject compound + // forms here so we fall back early (a late lowering failure + // abandons the whole file's EIR set) + if (n.operator !== "=") + throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); + if (n.left.type === b.Identifier) { + let binding = this.reference(n.left); + if (!binding) this.globalAssignedNames.add(n.left.name); + } else this.walkExpr(n.left); this.walkExpr(n.right); return; case b.CallExpression: diff --git a/test/eir-interop1-lib.js b/test/eir-interop1-lib.js new file mode 100644 index 00000000..03e46c1d --- /dev/null +++ b/test/eir-interop1-lib.js @@ -0,0 +1,29 @@ +export let counter = 0; +const K = 21; +export const NAME = "interop"; + +export function bump() { + counter = counter + 1; + return counter; +} + +export function doubled() { + return K * 2; +} + +export function helper(x) { + return x + 1; +} + +export function viaHelper() { + return helper(41); +} + +var fact = function (n) { + if (n < 2) return 1; + return n * fact(n - 1); +}; + +export function fact5() { + return fact(5); +} diff --git a/test/eir-interop1.js b/test/eir-interop1.js new file mode 100644 index 00000000..7ec51d78 --- /dev/null +++ b/test/eir-interop1.js @@ -0,0 +1,10 @@ +// generator: none +import { counter, NAME, bump, doubled, viaHelper, fact5 } from "./eir-interop1-lib"; + +console.log(NAME); +console.log(bump()); +console.log(bump()); +console.log(counter); +console.log(doubled()); +console.log(viaHelper()); +console.log(fact5()); diff --git a/test/expected/eir-interop1.js.expected-out b/test/expected/eir-interop1.js.expected-out new file mode 100644 index 00000000..e1760907 --- /dev/null +++ b/test/expected/eir-interop1.js.expected-out @@ -0,0 +1,7 @@ +interop +1 +2 +2 +42 +42 +120 From ae6de5599a75227640a7f2e9d80873f714349cc6 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 22:38:49 -0700 Subject: [PATCH 023/146] eir: switch, for-of, templates, arrows, update/compound assignment, defaults MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Syntax expansion aimed at the biggest --ir fallback buckets (which cascade: every fallen-back module function poisons its callers' viability): - update expressions (++/--, pre/post, identifier and member targets; old value numified via unary_plus); - compound assignment (+=, -=, ... via a shared operator table; object and computed key evaluated exactly once); - untagged template literals (string_concat/ToString chains through the new call_runtime emit case, matching the legacy inlined default handler); - switch statements (document-order strict_eq test chain, fallthrough bodies, shared case scope, separate break-only target stack so continue passes through to the enclosing loop); - for-of (Symbol.iterator/next/done/value protocol, same expansion as the legacy DesugarForOf pass); - arrow functions lowered as ordinary closures, with a lexical-`this` fallback guard; expression bodies supported; `var f = x => ...` is a module candidate (the var name doubles as the self name); - default parameters (undefined-check prologue, SSA/env merge); - fallback guard for closures capturing let/const loop variables, which would need per-iteration envs EIR doesn't build yet (the legacy DesugarLetLoopVars handles those correctly). emit: blocks now emitted in reverse postorder — creation order isn't dominance-compatible (switch bodies are created before their test chain), so defs could be emitted after their uses; unreachable blocks are dropped. cond_br conditions go through to_boolean (it's the only i1 producer). Also fixes a latent legacy-pipeline bug found while testing: DesugarUpdateAssignments kept only the first character of the operator, so <<=, >>= and >>>= compiled to <, > and > (booleans). shiftassign1 is the regression test; eir-syntax1 covers the new EIR syntax. self-hosted --ir coverage: 119 functions (was 50), 0 late failures; self-compile wall time unchanged (68.9s vs 70.6s legacy). //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,stage3} green (377 pass / 26 xfail); stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- lib/eir/emit.js | 52 +++- lib/eir/integrate.js | 9 +- lib/eir/lower.js | 307 +++++++++++++++++---- lib/eir/scopes.js | 130 ++++++++- lib/passes/desugar-update-assignments.js | 5 +- test/eir-syntax1.js | 76 +++++ test/expected/eir-syntax1.js.expected-out | 17 ++ test/expected/shiftassign1.js.expected-out | 6 + test/shiftassign1.js | 9 + 9 files changed, 541 insertions(+), 70 deletions(-) create mode 100644 test/eir-syntax1.js create mode 100644 test/expected/eir-syntax1.js.expected-out create mode 100644 test/expected/shiftassign1.js.expected-out create mode 100644 test/shiftassign1.js diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 09bbed77..d7970f69 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -58,6 +58,31 @@ const unop_for_op = { let mangle_gen = 0; +// reachable blocks of `fn` in reverse postorder (entry first). iterative +// DFS: block counts are small, but the self-hosted stack isn't deep. +function rpoBlocks(fn) { + let visited = new Set([fn.entry]); + let post = []; + let stack = [{ block: fn.entry, next: 0 }]; + while (stack.length > 0) { + let frame = stack[stack.length - 1]; + let last = frame.block.insts[frame.block.insts.length - 1]; + let targets = (last && last.targets) || []; + if (frame.next < targets.length) { + let succ = targets[frame.next++].block; + if (!visited.has(succ)) { + visited.add(succ); + stack.push({ block: succ, next: 0 }); + } + } else { + post.push(frame.block); + stack.pop(); + } + } + post.reverse(); + return post; +} + export class EIREmitter { // visitor: the active LLVMIRVisitor; we use its module, abi, // ejs_runtime/ejs_binops interfaces, getAtom, and ejs_globals. @@ -132,12 +157,22 @@ export class EIREmitter { this.this_slot = ir.createAlloca(types.EjsValue, "this_slot"); this.this_slot.setAlignment(8); - // create llvm blocks for every eir block, and phis for their params - for (let b of eirFn.blocks) { + // emit blocks in reverse postorder: a def's block always precedes + // its uses' blocks (dominators come first in any RPO), so the + // values map is filled before it's read. block *creation* order in + // the lowerer doesn't have that property (e.g. switch bodies are + // created before their test chain). unreachable blocks are dropped + // entirely — nothing branches to them, and their phis would be + // invalid (zero incoming edges). + let order = rpoBlocks(eirFn); + + // create llvm blocks for every reachable eir block, and phis for + // their params + for (let b of order) { let bb = new llvm.BasicBlock(b.name, llvmFn); this.blocks.set(b, bb); } - for (let b of eirFn.blocks) { + for (let b of order) { if (b === eirFn.entry) continue; ir.setInsertPoint(this.blocks.get(b)); for (let p of b.params) { @@ -171,7 +206,7 @@ export class EIREmitter { let prologue_end = ir.getInsertBlock(); // emit every block's instructions - for (let b of eirFn.blocks) { + for (let b of order) { ir.setInsertPoint(this.blocks.get(b)); for (let inst of b.insts) this.emitInst(inst); } @@ -608,6 +643,15 @@ export class EIREmitter { return; } + case "call_runtime": { + // a direct call to a named entry in the runtime method table + let callee = rt[inst.imms.name]; + if (!callee) + throw new Error(`EIR emit: no runtime function '${inst.imms.name}'`); + let argv = inst.operands.map((o) => this.val(o)); + return this.emitCallLike(inst, callee, argv, "rtres"); + } + default: { // generic binops / unops through the runtime interfaces let binop = binop_for_op[inst.op]; diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 3bf4bd0e..56d8ba60 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -206,13 +206,15 @@ function candidateOf(wrapped) { let stmt = unwrapExport(wrapped); if (stmt.type === b.FunctionDeclaration && stmt.id) return { name: stmt.id.name, fnNode: stmt }; - // var f = function () { ... }; (single declarator only) + // var f = function () { ... }; or var f = (x) => ...; (single + // declarator only) if ( stmt.type === b.VariableDeclaration && stmt.declarations.length === 1 && stmt.declarations[0].id.type === b.Identifier && stmt.declarations[0].init && - stmt.declarations[0].init.type === b.FunctionExpression + (stmt.declarations[0].init.type === b.FunctionExpression || + stmt.declarations[0].init.type === b.ArrowFunctionExpression) ) return { name: stmt.declarations[0].id.name, fnNode: stmt.declarations[0].init }; return null; @@ -332,6 +334,9 @@ export function collectEIRFunctions(tree, filename, module_infos, this_module_in entry.fnNode.eir_module = eir_module; entry.fnNode.eir_main = entry.info.name; entry.fnNode.body = { type: b.BlockStatement, body: [], loc: entry.fnNode.loc }; + // expression-bodied arrows just got a block body; keep the legacy + // DesugarArrowFunctions pass from wrapping it in a return + entry.fnNode.expression = false; debug.log(1, `EIR: ${filename}: '${entry.name}' lowered`); } diff --git a/lib/eir/lower.js b/lib/eir/lower.js index b0bb1f4e..9e789d04 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -17,18 +17,22 @@ // (%env, %this, ...params). // // Handled: literals, identifiers (locals/captured/globals), var/let/const, -// assignment (=), binary/logical/unary operators, member access, calls, -// new, this, sequence/array/object literals, function declarations and -// expressions (full closure support), if/else, while, do-while, for, -// break/continue, return, throw, try/catch (unwind edges). +// assignment (= and compound), update (++/--), binary/logical/unary +// operators, member access, calls, new, this, sequence/array/object +// literals, untagged template literals, function declarations and +// expressions, arrow functions that don't use `this` (full closure +// support), default parameters, if/else, while, do-while, for, for-of, +// switch, break/continue, return, throw, try/catch (unwind edges). // -// Not yet: for-in, switch, `arguments`, update/compound assignment, -// try/finally (desugar it first), labeled break/continue, getters/setters. +// Not yet: for-in, `arguments`, rest params, tagged templates, regex +// literals, arrows using lexical `this`, closures over let/const loop +// variables (per-iteration envs), try/finally (desugar it first), +// labeled break/continue, getters/setters. import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; import { Module } from "./ir"; -import { ScopeAnalysis } from "./scopes"; +import { ScopeAnalysis, compound_assign_ops } from "./scopes"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; const binops = { @@ -70,8 +74,11 @@ class LowerFunction { this.envParam = this.b.fn.entry.params[0]; this.thisParam = this.b.fn.entry.params[1]; - // loop stack for break/continue: { breakTarget, continueTarget } - this.loops = []; + // break/continue targets. loops push onto both stacks; switch + // statements only onto breakTargets (continue passes through a + // switch to the enclosing loop). + this.breakTargets = []; + this.continueTargets = []; // environment setup this.curEnv = this.envParam; @@ -90,6 +97,29 @@ class LowerFunction { } } + // default parameters: a param that arrived undefined takes its + // default (evaluated left to right, in the function scope). the + // conditional write merges via SSA (or the env, for captured + // params, whose initial store just happened above). + let defaults = info.defaults || []; + for (let i = 0; i < defaults.length; i++) { + if (!defaults[i]) continue; + let pb = info.params[i]; + let cur = this.readBinding(pb); + let isundef = this.b.emit("strict_eq", [cur, this.b.constUndefined()], {}); + let ubool = this.b.emit("to_boolean", [isundef], {}); + let dflt_bb = this.b.newBlock(`default_${pb.name}`); + let join_bb = this.b.newBlock(`default_join_${pb.name}`); + this.b.condBr(ubool, dflt_bb, [], join_bb, []); + this.b.sealBlock(dflt_bb); + this.b.setInsertPoint(dflt_bb); + let dv = this.expr(defaults[i]); + this.writeBinding(pb, dv); + this.b.br(join_bb, []); + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + } + // hoist function declarations: their closures exist from entry for (let binding of info.bindings) { if (binding.kind === "fn") { @@ -167,6 +197,10 @@ class LowerFunction { return this.unary(n); case b.AssignmentExpression: return this.assignment(n); + case b.UpdateExpression: + return this.update(n); + case b.TemplateLiteral: + return this.template(n); case b.CallExpression: return this.call(n); case b.NewExpression: @@ -176,6 +210,7 @@ class LowerFunction { case b.ConditionalExpression: return this.conditional(n); case b.FunctionExpression: + case b.ArrowFunctionExpression: return this.functionExpr(n); case b.SequenceExpression: { let v; @@ -302,55 +337,128 @@ class LowerFunction { } } + // store `value` into the identifier `idNode` (local binding, writable + // module slot, or global) + writeIdentifier(idNode, value) { + let binding = this.analysis.resolve(idNode); + if (binding === null || binding === undefined) { + let ref = this.mod_ctx.refs.get(idNode.name); + if (ref) { + if (!ref.writable) + throw LowerNotSupported( + `assignment to read-only module binding '${idNode.name}'`, + idNode.loc + ); + this.b.emit("module_slot_store", [value], { + module: ref.module, + slot: ref.slot, + }); + return; + } + if (this.mod_ctx.siblings.has(idNode.name)) + throw LowerNotSupported( + `assignment to module function '${idNode.name}'`, + idNode.loc + ); + this.b.emit("set_global", [value], { atom: idNode.name }); + return; + } + this.writeBinding(binding, value); + } + assignment(n) { - if (n.operator !== "=") + let binop = n.operator === "=" ? null : binops[compound_assign_ops[n.operator]]; + if (n.operator !== "=" && !binop) throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); if (n.left.type === b.Identifier) { - let binding = this.analysis.resolve(n.left); - if (binding === null || binding === undefined) { - let ref = this.mod_ctx.refs.get(n.left.name); - if (ref) { - if (!ref.writable) - throw LowerNotSupported( - `assignment to read-only module binding '${n.left.name}'`, - n.loc - ); - let v = this.expr(n.right); - this.b.emit("module_slot_store", [v], { - module: ref.module, - slot: ref.slot, - }); - return v; - } - if (this.mod_ctx.siblings.has(n.left.name)) - throw LowerNotSupported( - `assignment to module function '${n.left.name}'`, - n.loc - ); - let v = this.expr(n.right); - this.b.emit("set_global", [v], { atom: n.left.name }); - return v; + let v; + if (binop) { + let cur = this.identifier(n.left); + let rhs = this.expr(n.right); + v = this.b.emit(binop, [cur, rhs], {}); + } else { + v = this.expr(n.right); } - let v = this.expr(n.right); - this.writeBinding(binding, v); + this.writeIdentifier(n.left, v); return v; } if (n.left.type === b.MemberExpression) { + // evaluate the object (and computed key) exactly once let obj = this.expr(n.left.object); + let atom = null; + let key = null; + if (!n.left.computed && n.left.property.type === b.Identifier) + atom = n.left.property.name; + else key = this.expr(n.left.property); let v; - if (!n.left.computed && n.left.property.type === b.Identifier) { - v = this.expr(n.right); - this.b.emit("set_prop_atom", [obj, v], { atom: n.left.property.name }); + if (binop) { + let cur = + atom !== null + ? this.b.emit("get_prop_atom", [obj], { atom: atom }) + : this.b.emit("get_prop", [obj, key], {}); + let rhs = this.expr(n.right); + v = this.b.emit(binop, [cur, rhs], {}); } else { - let key = this.expr(n.left.property); v = this.expr(n.right); - this.b.emit("set_prop", [obj, key, v], {}); } + if (atom !== null) this.b.emit("set_prop_atom", [obj, v], { atom: atom }); + else this.b.emit("set_prop", [obj, key, v], {}); return v; } throw LowerNotSupported(`assignment target ${n.left.type}`, n.loc); } + // ++/--: ToNumber(old value) via unary_plus, then add/sub 1 + update(n) { + let one = this.b.constNumber(1); + let op = n.operator === "++" ? "add" : "sub"; + if (n.argument.type === b.Identifier) { + let cur = this.identifier(n.argument); + let old = this.b.emit("unary_plus", [cur], {}); + let nv = this.b.emit(op, [old, one], {}); + this.writeIdentifier(n.argument, nv); + return n.prefix ? nv : old; + } + if (n.argument.type === b.MemberExpression) { + let m = n.argument; + let obj = this.expr(m.object); + let atom = null; + let key = null; + if (!m.computed && m.property.type === b.Identifier) atom = m.property.name; + else key = this.expr(m.property); + let cur = + atom !== null + ? this.b.emit("get_prop_atom", [obj], { atom: atom }) + : this.b.emit("get_prop", [obj, key], {}); + let old = this.b.emit("unary_plus", [cur], {}); + let nv = this.b.emit(op, [old, one], {}); + if (atom !== null) this.b.emit("set_prop_atom", [obj, nv], { atom: atom }); + else this.b.emit("set_prop", [obj, key, nv], {}); + return n.prefix ? nv : old; + } + throw LowerNotSupported(`update of ${n.argument.type}`, n.loc); + } + + // untagged template literal: the inlined default handler — zip cooked + // strings and ToString'ed substitutions with string_concat (matching + // the legacy handleTemplateDefaultHandlerCall) + template(n) { + let strval = null; + let concat = (s) => { + if (!strval) strval = s; + else strval = this.b.emit("call_runtime", [strval, s], { name: "string_concat" }); + }; + for (let i = 0; i < n.quasis.length; i++) { + let cooked = n.quasis[i].value.cooked; + if (cooked.length !== 0) concat(this.b.constAtom(cooked)); + if (i < n.expressions.length) { + let sub = this.expr(n.expressions[i]); + concat(this.b.emit("call_runtime", [sub], { name: "ToString" })); + } + } + return strval || this.b.constAtom(""); + } + member(n) { let obj = this.expr(n.object); if (!n.computed && n.property.type === b.Identifier) @@ -467,6 +575,10 @@ class LowerFunction { return this.doWhileStmt(n); case b.ForStatement: return this.forStmt(n); + case b.ForOfStatement: + return this.forOfStmt(n); + case b.SwitchStatement: + return this.switchStmt(n); case b.ReturnStatement: this.b.ret(n.argument ? this.expr(n.argument) : this.b.constUndefined()); return; @@ -476,15 +588,15 @@ class LowerFunction { case b.TryStatement: return this.tryStmt(n); case b.BreakStatement: { - if (n.label || this.loops.length === 0) - throw LowerNotSupported("break outside plain loop", n.loc); - this.b.br(this.loops[this.loops.length - 1].breakTarget, []); + if (n.label || this.breakTargets.length === 0) + throw LowerNotSupported("break outside plain loop/switch", n.loc); + this.b.br(this.breakTargets[this.breakTargets.length - 1], []); return; } case b.ContinueStatement: { - if (n.label || this.loops.length === 0) + if (n.label || this.continueTargets.length === 0) throw LowerNotSupported("continue outside plain loop", n.loc); - this.b.br(this.loops[this.loops.length - 1].continueTarget, []); + this.b.br(this.continueTargets[this.continueTargets.length - 1], []); return; } case b.EmptyStatement: @@ -532,11 +644,13 @@ class LowerFunction { this.b.condBr(cbool, body, [], exit, []); this.b.sealBlock(body); - this.loops.push({ breakTarget: exit, continueTarget: header }); + this.breakTargets.push(exit); + this.continueTargets.push(header); this.b.setInsertPoint(body); this.stmt(n.body); if (!this.b.cur.terminated) this.b.br(header, []); - this.loops.pop(); + this.breakTargets.pop(); + this.continueTargets.pop(); this.b.sealBlock(header); this.b.sealBlock(exit); @@ -550,11 +664,13 @@ class LowerFunction { this.b.br(body, []); - this.loops.push({ breakTarget: exit, continueTarget: cond_bb }); + this.breakTargets.push(exit); + this.continueTargets.push(cond_bb); this.b.setInsertPoint(body); this.stmt(n.body); if (!this.b.cur.terminated) this.b.br(cond_bb, []); - this.loops.pop(); + this.breakTargets.pop(); + this.continueTargets.pop(); this.b.sealBlock(cond_bb); this.b.setInsertPoint(cond_bb); @@ -589,11 +705,13 @@ class LowerFunction { } this.b.sealBlock(body); - this.loops.push({ breakTarget: exit, continueTarget: update }); + this.breakTargets.push(exit); + this.continueTargets.push(update); this.b.setInsertPoint(body); this.stmt(n.body); if (!this.b.cur.terminated) this.b.br(update, []); - this.loops.pop(); + this.breakTargets.pop(); + this.continueTargets.pop(); this.b.sealBlock(update); this.b.setInsertPoint(update); @@ -604,6 +722,88 @@ class LowerFunction { this.b.setInsertPoint(exit); } + // mirrors the legacy DesugarForOf expansion: iterable[Symbol.iterator]() + // once, then `next()` per iteration, testing `.done` and binding `.value` + forOfStmt(n) { + let obj = this.expr(n.right); + let sym = this.b.emit("get_global", [], { atom: "Symbol" }); + let itkey = this.b.emit("get_prop_atom", [sym], { atom: "iterator" }); + let itfn = this.b.emit("get_prop", [obj, itkey], {}); + let iter = this.b.emit("call", [itfn, obj], {}); + + let header = this.b.newBlock("forof_header"); + let body = this.b.newBlock("forof_body"); + let exit = this.b.newBlock("forof_exit"); + + this.b.br(header, []); + + this.b.setInsertPoint(header); + let nextfn = this.b.emit("get_prop_atom", [iter], { atom: "next" }); + let res = this.b.emit("call", [nextfn, iter], {}); + let done = this.b.emit("get_prop_atom", [res], { atom: "done" }); + let dbool = this.b.emit("to_boolean", [done], {}); + this.b.condBr(dbool, exit, [], body, []); + this.b.sealBlock(body); + + this.b.setInsertPoint(body); + let v = this.b.emit("get_prop_atom", [res], { atom: "value" }); + if (n.left.type === b.VariableDeclaration) { + let binding = this.analysis.resolve(n.left.declarations[0].id); + this.writeBinding(binding, v); + } else { + this.writeIdentifier(n.left, v); + } + this.breakTargets.push(exit); + this.continueTargets.push(header); + this.stmt(n.body); + if (!this.b.cur.terminated) this.b.br(header, []); + this.breakTargets.pop(); + this.continueTargets.pop(); + + this.b.sealBlock(header); + this.b.sealBlock(exit); + this.b.setInsertPoint(exit); + } + + switchStmt(n) { + let disc = this.expr(n.discriminant); + let exit = this.b.newBlock("switch_exit"); + let bodies = n.cases.map((c, i) => this.b.newBlock(`case_body${i}`)); + let defaultIdx = n.cases.findIndex((c) => !c.test); + + // test chain, in document order, skipping default + for (let i = 0; i < n.cases.length; i++) { + if (!n.cases[i].test) continue; + let tv = this.expr(n.cases[i].test); + let cmp = this.b.emit("strict_eq", [disc, tv], {}); + let cbool = this.b.emit("to_boolean", [cmp], {}); + let next_test = this.b.newBlock(`case_test${i}`); + this.b.condBr(cbool, bodies[i], [], next_test, []); + this.b.sealBlock(next_test); + this.b.setInsertPoint(next_test); + } + // no test matched: default body, or out + this.b.br(defaultIdx >= 0 ? bodies[defaultIdx] : exit, []); + + // bodies, in document order, falling through to the next + this.breakTargets.push(exit); + for (let i = 0; i < n.cases.length; i++) { + // all of bodies[i]'s preds exist now: its test edge (above) and + // the fallthrough branch emitted for bodies[i-1] last iteration + this.b.sealBlock(bodies[i]); + this.b.setInsertPoint(bodies[i]); + for (let s of n.cases[i].consequent) { + this.stmt(s); + if (this.b.cur.terminated) break; + } + if (!this.b.cur.terminated) + this.b.br(i + 1 < n.cases.length ? bodies[i + 1] : exit, []); + } + this.breakTargets.pop(); + this.b.sealBlock(exit); + this.b.setInsertPoint(exit); + } + tryStmt(n) { let handler = n.handlers[0]; let catch_bb = this.b.newCatchBlock("catch"); @@ -642,7 +842,8 @@ function lowerOneFunction(info, analysis, module, mod_ctx) { if (info.lowered) return info.fn; info.lowered = true; let lf = new LowerFunction(info, analysis, module, mod_ctx); - lf.stmt(info.node.body); + if (info.node.body.type === b.BlockStatement) lf.stmt(info.node.body); + else lf.b.ret(lf.expr(info.node.body)); // expression-bodied arrow info.fn = lf.finish(); module.addFunction(info.fn); // hoisted closures may reference children whose declaration statement diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 3051f0b8..aaa37429 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -21,6 +21,22 @@ import * as b from "../ast-builder"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; +// compound assignment operator -> the binary operator it desugars to +// (kept in sync with lower.js's binops table) +export const compound_assign_ops = { + "+=": "+", + "-=": "-", + "*=": "*", + "/=": "/", + "%=": "%", + "&=": "&", + "|=": "|", + "^=": "^", + "<<=": "<<", + ">>=": ">>", + ">>>=": ">>>", +}; + let binding_id_gen = 0; export class Binding { @@ -86,6 +102,10 @@ export class ScopeAnalysis { this.anon_gen = 0; this.curScope = null; this.curFn = null; + // let/const loop variables: capturing one in a closure needs a + // per-iteration environment, which lowering doesn't build; the + // post-walk check in analyzeFunction falls back instead. + this.loopLetBindings = []; } resolve(node) { @@ -124,9 +144,17 @@ export class ScopeAnalysis { } let info = this.enterFunction(fnNode, name); if (selfBinding) selfBinding.fnInfo = info; - this.walkFnBody(fnNode.body); + if (fnNode.body.type === b.BlockStatement) this.walkFnBody(fnNode.body); + else this.walkExpr(fnNode.body); // expression-bodied arrow this.leaveFunction(); if (selfBinding) this.curScope = this.curScope.parent; + for (let lb of this.loopLetBindings) { + if (lb.captured) + throw LowerNotSupported( + `closure capturing loop variable '${lb.name}' (needs per-iteration env)`, + fnNode.loc + ); + } assignSlots(info); return info; } @@ -136,8 +164,6 @@ export class ScopeAnalysis { let info = new FnInfo(fnNode, fname, this.curFn); this.fnInfos.set(fnNode, info); - if (fnNode.defaults && fnNode.defaults.some((d) => d)) - throw LowerNotSupported("default parameters", fnNode.loc); if (fnNode.rest) throw LowerNotSupported("rest parameter", fnNode.loc); if (fnNode.generator) @@ -152,6 +178,13 @@ export class ScopeAnalysis { let binding = this.curScope.declare(p.name, "param"); info.params.push(binding); } + // default-parameter expressions are evaluated in the function scope + // (all params are declared, matching the sequential leftward-only + // visibility of the legacy DesugarDefaults lowering) + info.defaults = fnNode.defaults || []; + for (let d of info.defaults) { + if (d) this.walkExpr(d); + } return info; } @@ -261,8 +294,15 @@ export class ScopeAnalysis { case b.ForStatement: { this.curScope = new LexScope(this.curScope, this.curFn); if (n.init) { - if (n.init.type === b.VariableDeclaration) this.walkStmt(n.init); - else this.walkExpr(n.init); + if (n.init.type === b.VariableDeclaration) { + this.walkStmt(n.init); + if (n.init.kind !== "var") { + for (let d of n.init.declarations) { + let binding = this.refs.get(d.id); + if (binding) this.loopLetBindings.push(binding); + } + } + } else this.walkExpr(n.init); } if (n.test) this.walkExpr(n.test); if (n.update) this.walkExpr(n.update); @@ -270,6 +310,52 @@ export class ScopeAnalysis { this.curScope = this.curScope.parent; return; } + case b.ForOfStatement: { + this.curScope = new LexScope(this.curScope, this.curFn); + if (n.left.type === b.VariableDeclaration) { + if ( + n.left.declarations.length !== 1 || + n.left.declarations[0].id.type !== b.Identifier || + n.left.declarations[0].init + ) + throw LowerNotSupported("for-of binding form", n.loc); + let d = n.left.declarations[0]; + let scope = this.curScope; + if (n.left.kind === "var") { + while (!scope.isFnTop) scope = scope.parent; + } + let binding = scope.declare(d.id.name, "local"); + this.refs.set(d.id, binding); + if (n.left.kind !== "var") this.loopLetBindings.push(binding); + } else if (n.left.type === b.Identifier) { + let binding = this.reference(n.left); + if (!binding) this.globalAssignedNames.add(n.left.name); + } else { + throw LowerNotSupported(`for-of target ${n.left.type}`, n.loc); + } + this.walkExpr(n.right); + this.walkStmt(n.body); + this.curScope = this.curScope.parent; + return; + } + case b.SwitchStatement: { + this.walkExpr(n.discriminant); + // all case bodies share one lexical scope + this.curScope = new LexScope(this.curScope, this.curFn); + let sawDefault = false; + for (let c of n.cases) { + if (!c.test) { + if (sawDefault) + throw LowerNotSupported("duplicate default case", n.loc); + sawDefault = true; + } else { + this.walkExpr(c.test); + } + for (let s of c.consequent) this.walkStmt(s); + } + this.curScope = this.curScope.parent; + return; + } case b.ReturnStatement: if (n.argument) this.walkExpr(n.argument); return; @@ -327,10 +413,10 @@ export class ScopeAnalysis { this.walkExpr(n.argument); return; case b.AssignmentExpression: - // lowering only handles simple assignment; reject compound - // forms here so we fall back early (a late lowering failure - // abandons the whole file's EIR set) - if (n.operator !== "=") + // compound assignments must desugar to a binop lowering + // knows; reject others here so we fall back early (a late + // lowering failure abandons the whole file's EIR set) + if (n.operator !== "=" && !compound_assign_ops[n.operator]) throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); if (n.left.type === b.Identifier) { let binding = this.reference(n.left); @@ -338,6 +424,19 @@ export class ScopeAnalysis { } else this.walkExpr(n.left); this.walkExpr(n.right); return; + case b.UpdateExpression: + if (n.argument.type === b.Identifier) { + let binding = this.reference(n.argument); + if (!binding) this.globalAssignedNames.add(n.argument.name); + } else if (n.argument.type === b.MemberExpression) { + this.walkExpr(n.argument); + } else { + throw LowerNotSupported(`update of ${n.argument.type}`, n.loc); + } + return; + case b.TemplateLiteral: + for (let e of n.expressions) this.walkExpr(e); + return; case b.CallExpression: if (n.callee.type === b.Identifier) this.reference(n.callee, true); else this.walkExpr(n.callee); @@ -363,7 +462,20 @@ export class ScopeAnalysis { this.leaveFunction(); return; } + case b.ArrowFunctionExpression: { + // arrows lower as ordinary closures, which is only correct + // while they don't touch the lexical `this` (see the + // ThisExpression case below) + let name = `arrow${this.anon_gen++}`; + this.enterFunction(n, this.curFn ? `${this.curFn.name}.${name}` : name); + if (n.body.type === b.BlockStatement) this.walkFnBody(n.body); + else this.walkExpr(n.body); + this.leaveFunction(); + return; + } case b.ThisExpression: + if (this.curFn && this.curFn.node.type === b.ArrowFunctionExpression) + throw LowerNotSupported("lexical `this` in an arrow function", n.loc); return; case b.SequenceExpression: for (let e of n.expressions) this.walkExpr(e); diff --git a/lib/passes/desugar-update-assignments.js b/lib/passes/desugar-update-assignments.js index 68a2572b..c7c99a4a 100644 --- a/lib/passes/desugar-update-assignments.js +++ b/lib/passes/desugar-update-assignments.js @@ -42,7 +42,8 @@ export class DesugarUpdateAssignments extends TransformPass { if (n.left.type === b.Identifier) { // for identifiers we just expand a += b to a = a + b - n.right = b.binaryExpression(n.left, n.operator[0], n.right); + // strip the trailing '=' ("<<=" -> "<<", not "<") + n.right = b.binaryExpression(n.left, n.operator.slice(0, -1), n.right); n.operator = "="; return n; } @@ -80,7 +81,7 @@ export class DesugarUpdateAssignments extends TransformPass { n.right = b.binaryExpression( b.memberExpression(n.left.object, n.left.property, n.left.computed), - n.operator[0], + n.operator.slice(0, -1), n.right ); n.operator = "="; diff --git a/test/eir-syntax1.js b/test/eir-syntax1.js new file mode 100644 index 00000000..a2fc6b69 --- /dev/null +++ b/test/eir-syntax1.js @@ -0,0 +1,76 @@ +function counters() { + let i = 0; + let s = "5"; + console.log(i++); + console.log(++i); + console.log(s++); + console.log(--i); + let o = { n: 10, arr: [1, 2, 3] }; + o.n++; + o.arr[1]--; + console.log(o.n, o.arr[1]); +} + +function compounds() { + let x = 1; + x += 2; x *= 3; x -= 1; x %= 5; x <<= 2; x |= 1; x ^= 2; x >>= 1; + console.log(x); + let s = "a"; + s += "b"; + console.log(s); + let o = { v: 7 }; + o.v += 3; + o["v"] -= 1; + console.log(o.v); +} + +function templates(a, b) { + console.log(`plain`); + console.log(``.length); + console.log(`a=${a} b=${b}`); + console.log(`nested ${a > 1 ? `big ${a}` : "small"}!`); +} + +function switches(x) { + let r = ""; + switch (x) { + case 1: r += "one "; + case 2: r += "two "; break; + case 3: r += "three "; break; + default: r += "other "; + } + return r; +} + +function forofs(arr) { + let sum = 0; + for (let v of arr) { + if (v < 0) continue; + if (v > 99) break; + sum += v; + } + let last; + for (last of arr) {} + return `${sum}:${last}`; +} + +function withDefaults(a, b = a + 1, c = "x") { + return `${a},${b},${c}`; +} + +var doubler = (x) => x * 2; +var describe = (n) => { if (n % 2 === 0) return `even ${n}`; return `odd ${n}`; }; + +function arrows(arr) { + let big = arr.map(doubler).map((v) => v + 1); + console.log(big.join(",")); + console.log(describe(4), describe(5)); +} + +counters(); +compounds(); +templates(2, "z"); +console.log(switches(1), "|", switches(3), "|", switches(9)); +console.log(forofs([1, 2, -5, 3, 200, 4])); +console.log(withDefaults(1), "|", withDefaults(1, 5), "|", withDefaults(1, undefined, "y")); +arrows([1, 2, 3]); diff --git a/test/expected/eir-syntax1.js.expected-out b/test/expected/eir-syntax1.js.expected-out new file mode 100644 index 00000000..da1f3b9d --- /dev/null +++ b/test/expected/eir-syntax1.js.expected-out @@ -0,0 +1,17 @@ +0 +2 +5 +1 +11 1 +7 +ab +9 +plain +0 +a=2 b=z +nested big 2! +one two | three | other +6:4 +1,2,x | 1,5,x | 1,2,y +3,5,7 +even 4 odd 5 diff --git a/test/expected/shiftassign1.js.expected-out b/test/expected/shiftassign1.js.expected-out new file mode 100644 index 00000000..b9d9706f --- /dev/null +++ b/test/expected/shiftassign1.js.expected-out @@ -0,0 +1,6 @@ +13 +15 +7 +20 +5 +5 diff --git a/test/shiftassign1.js b/test/shiftassign1.js new file mode 100644 index 00000000..694f1dac --- /dev/null +++ b/test/shiftassign1.js @@ -0,0 +1,9 @@ +function t() { + let a = 12; a |= 1; console.log(a); + let b = 13; b ^= 2; console.log(b); + let c = 15; c >>= 1; console.log(c); + let d = 5; d <<= 2; console.log(d); + let e = 20; e >>>= 2; console.log(e); + let f = 7; f &= 5; console.log(f); +} +t(); From d4eda7b515c5ab3916931e498b621688d7c1b791 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 7 Jul 2026 23:09:34 -0700 Subject: [PATCH 024/146] eir: for-in, rest params, regex literals, exported fns as values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - for-in via new prop_iter_new/next/current ops wrapping the runtime property iterator (same expansion as the legacy visitForIn). the iterator value is opaque (EjsPropIterator, not an ejsval) and stays a direct instruction reference; prop_iter_next returns the runtime's i8 bool, which the cond_br emit case coerces to i1; - rest parameters: a trailing RestElement (or legacy fnNode.rest) declares an ordinary local filled by the new rest_args op — a branch-free select over argc feeding array_new_copy; - regex literals lower to make_regexp (fresh RegExp per evaluation via regexp_new_utf8, matching the legacy visitLiteral); - exported function/class declarations join mod_ctx.refs, so sibling functions used as *values* (arr.map(inc), twice(inc, x)) load the module slot the legacy toplevel stored the closure in — identity- correct, unlike minting a fresh closure per reference. calls still prefer the direct-call path. Also fixes a latent RUNTIME bug this work tripped over: the dense-array fast path of Array.prototype.slice didn't normalize negative indices (slice(0, -1) computed a negative count and segfaulted in memmove) and treated an explicit undefined end as NaN. Fixed per ES6 22.1.3.22; test/slice-negative1.js is the regression test, eir-syntax2 covers the new EIR syntax. self-hosted --ir coverage: 136 functions (was 119), 0 late failures. //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,stage3} green (379 pass / 26 xfail); stage2/stage3 byte-identical modulo the embedded output filename. Co-Authored-By: Claude Fable 5 --- lib/eir/emit.js | 61 ++++++++++++++++++ lib/eir/integrate.js | 61 ++++++++++++------ lib/eir/lower.js | 64 ++++++++++++++++++- lib/eir/ops.js | 14 ++++ lib/eir/scopes.js | 39 ++++++++--- lib/eir/tests.js | 2 +- runtime/ejs-array.c | 17 +++-- test/eir-syntax2-lib.js | 12 ++++ test/eir-syntax2.js | 37 +++++++++++ test/expected/eir-syntax2.js.expected-out | 9 +++ test/expected/slice-negative1.js.expected-out | 6 ++ test/slice-negative1.js | 7 ++ 12 files changed, 291 insertions(+), 38 deletions(-) create mode 100644 test/eir-syntax2-lib.js create mode 100644 test/eir-syntax2.js create mode 100644 test/expected/eir-syntax2.js.expected-out create mode 100644 test/expected/slice-negative1.js.expected-out create mode 100644 test/slice-negative1.js diff --git a/lib/eir/emit.js b/lib/eir/emit.js index d7970f69..3a6bddca 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -143,6 +143,9 @@ export class EIREmitter { let this_ptr = args[1]; let argc = args[2]; let args_ptr = args[3]; + // rest_args needs the raw calling-convention values + this.fn_argc = argc; + this.fn_args_ptr = args_ptr; // scratch space for outgoing call arguments, and a slot for passing // &this to the runtime's calling convention @@ -601,6 +604,10 @@ export class EIREmitter { } case "cond_br": { let cond = this.val(inst.operands[0]); + // prop_iter_next produces the runtime's i8 EJSBool; every + // other condition source (to_boolean) is already an i1 + if (inst.operands[0].op === "prop_iter_next") + cond = ir.createICmpEq(cond, consts.True(), "moreleft_i1"); this.addEdgeIncomings(inst, inst.targets[0]); this.addEdgeIncomings(inst, inst.targets[1]); ir.createCondBr( @@ -643,6 +650,60 @@ export class EIREmitter { return; } + case "make_regexp": { + let source = consts.string(ir, inst.imms.source); + let flags = consts.string(ir, inst.imms.flags); + return this.emitCallLike(inst, rt.regexp_new_utf8, [source, flags], "regexp"); + } + + case "rest_args": { + // rest = argc > index ? array_new_copy(argc - index, args + index) + // : array_new_copy(0, args) + // (count of zero never dereferences the pointer, so the + // select keeps this branch-free) + let index = inst.imms.index; + let has_rest = ir.createICmpSGt(this.fn_argc, consts.int32(index), "has_rest"); + let count = ir.createNswSub(this.fn_argc, consts.int32(index), "rest_count"); + count = ir.createSelect(has_rest, count, consts.int32(0), "rest_count_sel"); + count = ir.createZExt(count, types.Int64, "rest_count64"); + let gep = ir.createGetElementPointer( + types.EjsValue, + this.fn_args_ptr, + [consts.int64(index)], + "rest_args" + ); + let ptr = ir.createSelect(has_rest, gep, this.fn_args_ptr, "rest_ptr"); + let rv = this.call(rt.array_new_copy, [count, ptr], "rest"); + this.values.set(inst, rv); + return rv; + } + + case "prop_iter_new": { + return this.emitCallLike( + inst, + rt.prop_iterator_new, + [this.val(inst.operands[0])], + "propiter" + ); + } + case "prop_iter_next": { + // returns the runtime's i1 directly; consumed by cond_br + return this.emitCallLike( + inst, + rt.prop_iterator_next, + [this.val(inst.operands[0]), consts.True()], + "moreleft" + ); + } + case "prop_iter_current": { + return this.emitCallLike( + inst, + rt.prop_iterator_current, + [this.val(inst.operands[0])], + "propcur" + ); + } + case "call_runtime": { // a direct call to a named entry in the runtime method table let callee = rt[inst.imms.name]; diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 56d8ba60..001eb6f4 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -12,16 +12,18 @@ // - named imports from non-native modules: lowered as module_slot_load // (or folded, when the export is a const literal); // - this module's own exported bindings: module_slot_load/store against -// the "%self" module global (const-literal exports fold); +// the "%self" module global (const-literal exports fold; exported +// functions/classes read in value position load the slot, so closure +// identity is preserved); // - non-exported module-level bindings with literal initializers that // are never reassigned: folded to the literal; -// - sibling candidates, in call position only: lowered as direct calls -// into the EIR-emitted function (no closure dispatch). viability is -// a fixed point: a candidate depending on a fallen-back sibling falls +// - sibling candidates in call position: lowered as direct calls into +// the EIR-emitted function (no closure dispatch). viability is a +// fixed point: a candidate depending on a fallen-back sibling falls // back too. -// anything else (non-exported mutable module vars, namespace/default -// imports, siblings used as values, unsupported syntax) falls back per -// function via LowerNotSupported. +// anything else (non-exported mutable module vars, non-exported siblings +// used as values, namespace/default imports, unsupported syntax) falls +// back per function via LowerNotSupported. // // all of a file's candidates lower into ONE shared EIR module so direct // calls resolve within it; tagged nodes keep their (emptied) body through @@ -137,22 +139,39 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { for (let wrapped of toplevelBody) { if (wrapped.type !== b.ExportNamedDeclaration) continue; let decl = wrapped.declaration; - if (!decl || Array.isArray(decl) || decl.type !== b.VariableDeclaration) continue; - let is_const = decl.kind === "const"; - for (let d of decl.declarations) { - if (d.id.type !== b.Identifier) continue; - if (!this_module_info.exports.has(d.id.name)) continue; - let export_info = this_module_info.exports.get(d.id.name); - let entry = { + if (!decl || Array.isArray(decl)) continue; + if (decl.type === b.VariableDeclaration) { + let is_const = decl.kind === "const"; + for (let d of decl.declarations) { + if (d.id.type !== b.Identifier) continue; + if (!this_module_info.exports.has(d.id.name)) continue; + let export_info = this_module_info.exports.get(d.id.name); + let entry = { + module: "%self", + slot: export_info.slot_num, + writable: !is_const, + }; + if (is_const && isFoldableLiteral(export_info.constval)) { + entry.constval = export_info.constval; + entry.writable = false; + } + refs.set(d.id.name, entry); + } + } else if ( + (decl.type === b.FunctionDeclaration || decl.type === b.ClassDeclaration) && + decl.id + ) { + // an exported function/class read in value position loads + // the slot the legacy toplevel stored the (single) closure + // in — identity-correct, unlike minting a new closure per + // reference. writes fall back (writable: false). + if (!this_module_info.exports.has(decl.id.name)) continue; + let export_info = this_module_info.exports.get(decl.id.name); + refs.set(decl.id.name, { module: "%self", slot: export_info.slot_num, - writable: !is_const, - }; - if (is_const && isFoldableLiteral(export_info.constval)) { - entry.constval = export_info.constval; - entry.writable = false; - } - refs.set(d.id.name, entry); + writable: false, + }); } } } diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 9e789d04..f8b8c580 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -97,12 +97,19 @@ class LowerFunction { } } + // the rest parameter materializes from the trailing arguments + if (info.restBinding) { + let rest = this.b.emit("rest_args", [], { index: info.params.length }); + this.writeBinding(info.restBinding, rest); + } + // default parameters: a param that arrived undefined takes its // default (evaluated left to right, in the function scope). the // conditional write merges via SSA (or the env, for captured // params, whose initial store just happened above). let defaults = info.defaults || []; - for (let i = 0; i < defaults.length; i++) { + let ndefaults = Math.min(defaults.length, info.params.length); + for (let i = 0; i < ndefaults; i++) { if (!defaults[i]) continue; let pb = info.params[i]; let cur = this.readBinding(pb); @@ -248,6 +255,20 @@ class LowerFunction { return this.b.constAtom(n.value); case "boolean": return this.b.constBool(n.value); + case "object": { + // a regex literal: fresh RegExp per evaluation, like the + // legacy visitLiteral + if (typeof n.value.source !== "string") + throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); + let flags = + (n.value.global ? "g" : "") + + (n.value.multiline ? "m" : "") + + (n.value.ignoreCase ? "i" : ""); + return this.b.emit("make_regexp", [], { + source: n.value.source, + flags: flags, + }); + } default: throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); } @@ -577,6 +598,8 @@ class LowerFunction { return this.forStmt(n); case b.ForOfStatement: return this.forOfStmt(n); + case b.ForInStatement: + return this.forInStmt(n); case b.SwitchStatement: return this.switchStmt(n); case b.ReturnStatement: @@ -765,6 +788,45 @@ class LowerFunction { this.b.setInsertPoint(exit); } + // mirrors the legacy visitForIn: prop_iterator_new once, then + // prop_iterator_next / prop_iterator_current per iteration. the + // iterator value is opaque (not an ejsval) and must stay a direct + // instruction reference — never a block argument. + forInStmt(n) { + let obj = this.expr(n.right); + let iter = this.b.emit("prop_iter_new", [obj], {}); + + let header = this.b.newBlock("forin_header"); + let body = this.b.newBlock("forin_body"); + let exit = this.b.newBlock("forin_exit"); + + this.b.br(header, []); + + this.b.setInsertPoint(header); + let more = this.b.emit("prop_iter_next", [iter], {}); // i1 + this.b.condBr(more, body, [], exit, []); + this.b.sealBlock(body); + + this.b.setInsertPoint(body); + let v = this.b.emit("prop_iter_current", [iter], {}); + if (n.left.type === b.VariableDeclaration) { + let binding = this.analysis.resolve(n.left.declarations[0].id); + this.writeBinding(binding, v); + } else { + this.writeIdentifier(n.left, v); + } + this.breakTargets.push(exit); + this.continueTargets.push(header); + this.stmt(n.body); + if (!this.b.cur.terminated) this.b.br(header, []); + this.breakTargets.pop(); + this.continueTargets.pop(); + + this.b.sealBlock(header); + this.b.sealBlock(exit); + this.b.setInsertPoint(exit); + } + switchStmt(n) { let disc = this.expr(n.discriminant); let exit = this.b.newBlock("switch_exit"); diff --git a/lib/eir/ops.js b/lib/eir/ops.js index bbf99efd..c3d05baf 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -103,6 +103,20 @@ export const OPS = { make_array: { arity: -1, effects: E.GC | E.WRITE }, // imms.keys: array of atom names, one per operand make_object: { arity: -1, effects: E.GC | E.WRITE, imms: ["keys"] }, + // a fresh RegExp per evaluation (ES6 semantics, matching the legacy + // visitLiteral); imms.source/imms.flags are strings + make_regexp: { arity: 0, effects: E.THROW | E.GC, imms: ["source", "flags"] }, + // the rest-parameter array: arguments from index imms.index onward + // (empty array if argc <= index) + rest_args: { arity: 0, effects: E.GC, imms: ["index"] }, + + // --- for-in property iteration ------------------------------------------ + // the iterator value is an opaque non-ejsval; it must only be consumed + // directly by the two ops below (never passed as a block argument) + prop_iter_new: { arity: 1, effects: E.READ | E.THROW | E.GC }, + // produces an i1 (like to_boolean): true if a property was advanced to + prop_iter_next: { arity: 1, effects: E.READ | E.WRITE | E.THROW | E.GC }, + prop_iter_current: { arity: 1, effects: E.READ | E.GC }, // --- low tier --------------------------------------------------------------- has_tag: { arity: 1, effects: E.NONE, imms: ["tag"] }, diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index aaa37429..6ac731b2 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -164,20 +164,38 @@ export class ScopeAnalysis { let info = new FnInfo(fnNode, fname, this.curFn); this.fnInfos.set(fnNode, info); - if (fnNode.rest) - throw LowerNotSupported("rest parameter", fnNode.loc); if (fnNode.generator) throw LowerNotSupported("generator function", fnNode.loc); this.curFn = info; this.curScope = new LexScope(this.curScope, info); this.curScope.isFnTop = true; - for (let p of fnNode.params) { + // the rest parameter (a trailing RestElement, or fnNode.rest in + // older ASTs) is an ordinary local initialized from the trailing + // arguments in the prologue (see lower.js / rest_args) + let restId = fnNode.rest || null; + let plainParams = fnNode.params; + let last = plainParams[plainParams.length - 1]; + if (last && last.type === b.RestElement) { + restId = last.argument; + // (positive end index: the self-hosted runtime's slice-dense + // fast path crashes on negative indices — see runtime bug note + // in ejs-array.c / test/slice-negative1.js) + plainParams = plainParams.slice(0, plainParams.length - 1); + } + for (let p of plainParams) { if (p.type !== b.Identifier) throw LowerNotSupported(`param pattern ${p.type}`, fnNode.loc); let binding = this.curScope.declare(p.name, "param"); info.params.push(binding); } + info.restBinding = null; + if (restId) { + if (restId.type !== b.Identifier) + throw LowerNotSupported(`rest pattern ${restId.type}`, fnNode.loc); + info.restBinding = this.curScope.declare(restId.name, "local"); + this.refs.set(restId, info.restBinding); + } // default-parameter expressions are evaluated in the function scope // (all params are declared, matching the sequential leftward-only // visibility of the legacy DesugarDefaults lowering) @@ -310,6 +328,7 @@ export class ScopeAnalysis { this.curScope = this.curScope.parent; return; } + case b.ForInStatement: case b.ForOfStatement: { this.curScope = new LexScope(this.curScope, this.curFn); if (n.left.type === b.VariableDeclaration) { @@ -318,7 +337,7 @@ export class ScopeAnalysis { n.left.declarations[0].id.type !== b.Identifier || n.left.declarations[0].init ) - throw LowerNotSupported("for-of binding form", n.loc); + throw LowerNotSupported("for-of/for-in binding form", n.loc); let d = n.left.declarations[0]; let scope = this.curScope; if (n.left.kind === "var") { @@ -331,7 +350,7 @@ export class ScopeAnalysis { let binding = this.reference(n.left); if (!binding) this.globalAssignedNames.add(n.left.name); } else { - throw LowerNotSupported(`for-of target ${n.left.type}`, n.loc); + throw LowerNotSupported(`for-of/for-in target ${n.left.type}`, n.loc); } this.walkExpr(n.right); this.walkStmt(n.body); @@ -396,10 +415,12 @@ export class ScopeAnalysis { walkExpr(n) { switch (n.type) { case b.Literal: - // regex literals (and any other object-valued literal) - // aren't lowerable; reject here so we fall back early - if (n.value !== null && typeof n.value === "object") - throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); + // object-valued literals are regexes (lowerable) or + // engine-specific oddities (fall back early) + if (n.value !== null && typeof n.value === "object") { + if (typeof n.value.source !== "string") + throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); + } return; case b.Identifier: this.reference(n); diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 944905dc..c4d22b1f 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -307,7 +307,7 @@ test("lower: this expression", () => { test("lower: unsupported constructs raise LowerNotSupported", () => { let threw = false; try { - lowerFunctionNode(parseFn("function t(x) { for (let k in x) { } }")); + lowerFunctionNode(parseFn("function t(x) { lbl: for (;;) { break lbl; } }")); } catch (e) { threw = isLowerNotSupported(e); } diff --git a/runtime/ejs-array.c b/runtime/ejs-array.c index d285f499..2c471d51 100644 --- a/runtime/ejs-array.c +++ b/runtime/ejs-array.c @@ -2155,17 +2155,22 @@ static ejsval _ejs_array_slice_dense (ejsval env, ejsval _this, uint32_t argc, ejsval* args) { int len = EJS_ARRAY_LEN(_this); - int begin = argc > 0 ? (int)EJSVAL_TO_NUMBER(args[0]) : 0; - int end = argc > 1 ? (int)EJSVAL_TO_NUMBER(args[1]) : len; + int begin = argc > 0 && !EJSVAL_IS_UNDEFINED(args[0]) ? (int)EJSVAL_TO_NUMBER(args[0]) : 0; + int end = argc > 1 && !EJSVAL_IS_UNDEFINED(args[1]) ? (int)EJSVAL_TO_NUMBER(args[1]) : len; - begin = MIN(begin, len); - end = MIN(end, len); + // negative indices count from the end (ES6 22.1.3.22 steps 5/7) + if (begin < 0) begin = MAX(len + begin, 0); + else begin = MIN(begin, len); + if (end < 0) end = MAX(len + end, 0); + else end = MIN(end, len); - ejsval rv = ArraySpeciesCreate(_this, end-begin); + int count = MAX(end - begin, 0); + + ejsval rv = ArraySpeciesCreate(_this, count); memmove (&EJS_DENSE_ARRAY_ELEMENTS(rv)[0], &EJS_DENSE_ARRAY_ELEMENTS(_this)[begin], - (end-begin) * sizeof(ejsval)); + count * sizeof(ejsval)); return rv; } diff --git a/test/eir-syntax2-lib.js b/test/eir-syntax2-lib.js new file mode 100644 index 00000000..99833f0f --- /dev/null +++ b/test/eir-syntax2-lib.js @@ -0,0 +1,12 @@ +export function makeTag(name) { + return "<" + name + ">"; +} +export function twice(f, x) { + return f(f(x)); +} +export function inc(x) { + return x + 1; +} +export function incTwice(x) { + return twice(inc, x); +} diff --git a/test/eir-syntax2.js b/test/eir-syntax2.js new file mode 100644 index 00000000..64aac9ad --- /dev/null +++ b/test/eir-syntax2.js @@ -0,0 +1,37 @@ +// generator: none +import { makeTag, twice, inc, incTwice } from "./eir-syntax2-lib"; + +function forins(o) { + let ks = []; + for (let k in o) { + if (k === "skip") continue; + ks.push(k); + } + let k2; + for (k2 in o) {} + return ks.join(",") + "|" + k2; +} + +function rests(a, ...xs) { + return `${a}:${xs.length}:${xs.join("-")}`; +} + +function restOnly(...xs) { + return xs.map((x) => x * 2).join(","); +} + +function regexes(s) { + let re = /a(b+)c/i; + console.log(re.test(s)); + console.log(s.replace(/b+/g, "B")); + let m = s.match(/a(b+)c/); + console.log(m ? m[1] : "none"); +} + +console.log(forins({ x: 1, skip: 2, y: 3 })); +console.log(rests(9), "|", rests(9, 1), "|", rests(9, 1, 2, 3)); +console.log(restOnly(1, 2, 3)); +regexes("xxabbbcyy"); +console.log(twice(inc, 5)); +console.log(incTwice(10)); +console.log(makeTag("div")); diff --git a/test/expected/eir-syntax2.js.expected-out b/test/expected/eir-syntax2.js.expected-out new file mode 100644 index 00000000..400d4643 --- /dev/null +++ b/test/expected/eir-syntax2.js.expected-out @@ -0,0 +1,9 @@ +x,y|y +9:0: | 9:1:1 | 9:3:1-2-3 +2,4,6 +true +xxaBcyy +bbb +7 +12 +
diff --git a/test/expected/slice-negative1.js.expected-out b/test/expected/slice-negative1.js.expected-out new file mode 100644 index 00000000..0f80b486 --- /dev/null +++ b/test/expected/slice-negative1.js.expected-out @@ -0,0 +1,6 @@ +1,2,3,4 +4,5 +2,3,4 +0 +1,2,3,4,5 +1,2,3,4,5 diff --git a/test/slice-negative1.js b/test/slice-negative1.js new file mode 100644 index 00000000..f12f4902 --- /dev/null +++ b/test/slice-negative1.js @@ -0,0 +1,7 @@ +let a = [1, 2, 3, 4, 5]; +console.log(a.slice(0, -1).join(",")); +console.log(a.slice(-2).join(",")); +console.log(a.slice(-4, -1).join(",")); +console.log(a.slice(1, -10).length); +console.log(a.slice(0, undefined).join(",")); +console.log(a.slice(-100).join(",")); From 9b95058c99dcbefae0bd17c0e15bec4fb9d12662 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 8 Jul 2026 21:54:29 -0700 Subject: [PATCH 025/146] eir: namespace/default imports + a let-init scoping fix + --ir bootstrap CI MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Namespace imports (`import * as ns`) become refs bound to the module object: - ns.member on a JS module resolves to a module_slot_load (const exports fold) at compile time, mirroring new-cc's visitMemberExpression rewrite — JS module objects don't answer runtime property lookups for their exports. ns.member(...) calls pass `this` = undefined, exactly as the legacy rewrite does; - native modules ("@llvm") have no link-time global, so their namespace object is fetched at runtime through module_get (the same fallback the legacy handleModuleGetExotic uses) and member access stays a runtime property get; - default imports resolve through the "default" export slot. Fixes a serious scope-analysis bug the new coverage exposed: bindings were declared AFTER their initializer was walked, so a closure created inside the initializer (`let walk = (n) => { ... walk(el) ... }` — integrate.js's own collectAssignedNames) resolved its recursive reference to a GLOBAL, and lowering emitted get_global -> undefined -> "object not a function" at runtime. Bindings are now declared before the init walk, and lowering pre-initializes them to undefined so a direct `let x = x` still reads undefined (matching legacy alloca semantics). eir-recarrow1 is the regression test. The bug only bit in the --ir-compiled compiler and sailed through the whole test matrix: the stage2/stage3 fixed point builds WITHOUT --ir, so nothing exercised --ir-generated code generating code. New targets close that hole: //:ejs.exe.stage2-ir (stage1 self-compiles with --ir) and //:test-bootstrap-ir (that binary must pass the full suite with --ir). buck-stage.sh takes extra compiler flags to support it. Also adds --ir-exclude / --ir-exclude-fn debugging flags (file/function substring filters), which turned the bootstrap miscompile hunt into a few binary-search self-compiles. self-hosted --ir coverage: 173 functions (was 136), 0 late failures. //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,bootstrap-ir,stage3} green (381 pass / 26 xfail); stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- BUCK | 22 +++++++++ buck-stage.sh | 7 ++- ejs-es6.js | 16 +++++++ lib/compiler.js | 11 ++++- lib/eir/emit.js | 18 +++++++ lib/eir/integrate.js | 42 ++++++++++++++--- lib/eir/lower.js | 52 ++++++++++++++++++++- lib/eir/scopes.js | 10 +++- test/eir-ns1-lib.js | 12 +++++ test/eir-ns1.js | 22 +++++++++ test/eir-recarrow1.js | 34 ++++++++++++++ test/expected/eir-ns1.js.expected-out | 3 ++ test/expected/eir-recarrow1.js.expected-out | 3 ++ 13 files changed, 239 insertions(+), 13 deletions(-) create mode 100644 test/eir-ns1-lib.js create mode 100644 test/eir-ns1.js create mode 100644 test/eir-recarrow1.js create mode 100644 test/expected/eir-ns1.js.expected-out create mode 100644 test/expected/eir-recarrow1.js.expected-out diff --git a/BUCK b/BUCK index 17c3698d..5727479e 100644 --- a/BUCK +++ b/BUCK @@ -128,6 +128,28 @@ genrule( for stage in ["1", "2", "3"] ] +# the --ir bootstrap: stage1 compiles the compiler WITH --ir, and the +# resulting binary must pass the full suite (with --ir). this is the +# check that catches --ir miscompiles of the compiler itself, which the +# plain stage2/stage3 fixed point (built without --ir) never exercises. +genrule( + name = "ejs.exe.stage2-ir", + srcs = ["buck-stage.sh"], + out = "ejs.exe.stage2-ir", + cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" exe ' + + '"$(location :ejs.exe.stage1)" - ' + llvm_bindir() + " --ir", +) + +genrule( + name = "test-bootstrap-ir", + srcs = ["buck-test-stage.sh"], + out = "test-bootstrap-ir.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location :ejs.exe.stage2-ir)" ' + + '2 "$(location //test:files)" ' + llvm_bindir() + + " --ir", +) + [ genrule( name = "test-stage" + stage + "-ir", diff --git a/buck-stage.sh b/buck-stage.sh index 4ba5229d..75b10053 100644 --- a/buck-stage.sh +++ b/buck-stage.sh @@ -9,6 +9,7 @@ MODE="$2" # "node" (stage0 compiler) or "exe" (previous stage binary) COMPILER="$3" # node: //lib:generated dir; exe: previous ejs.exe.stageN LLVM_NODE="$4" # node: //node-llvm:llvm.node; exe: "-" LLVM_BIN="$5" # directory holding llc/opt (and llvm-config) +EXTRA_FLAGS="${6:-}" # extra compiler flags for the self-compile, e.g. --ir abspath() { if [ -d "$1" ]; then @@ -40,7 +41,11 @@ if [ "$(uname -s)" = "Darwin" ]; then export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" fi -EJS_ARGS=(--srcdir --leave-temp --moduledir node-compat --moduledir ejs-llvm ejs-es6.js) +EJS_ARGS=(--srcdir --leave-temp --moduledir node-compat --moduledir ejs-llvm) +if [ -n "$EXTRA_FLAGS" ]; then + EJS_ARGS+=($EXTRA_FLAGS) +fi +EJS_ARGS+=(ejs-es6.js) if [ "$MODE" = "node" ]; then mkdir -p lib/generated diff --git a/ejs-es6.js b/ejs-es6.js index e68e90d2..a66c8319 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -109,6 +109,8 @@ let options = { import_variables: [], srcdir: false, ir: false, + ir_exclude: [], + ir_exclude_fn: [], stdout_writer: new Writer(process.stdout), }; @@ -189,6 +191,20 @@ let args = { flag: "ir", help: "use the EIR (SSA) pipeline for eligible functions, falling back per function.", }, + "--ir-exclude": { + handler: (arg) => { + options.ir_exclude = options.ir_exclude.concat(arg.split(",")); + }, + handlerArgc: 1, + help: "comma-separated filename substrings to exclude from the EIR pipeline (debugging).", + }, + "--ir-exclude-fn": { + handler: (arg) => { + options.ir_exclude_fn = options.ir_exclude_fn.concat(arg.split(",")); + }, + handlerArgc: 1, + help: "comma-separated function-name substrings to exclude from the EIR pipeline (debugging).", + }, "-I": { handler: add_import_variable, handlerArgc: 1, diff --git a/lib/compiler.js b/lib/compiler.js index d7e657bb..0d204a27 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -3521,8 +3521,15 @@ export function compile(tree, base_output_filename, source_filename, module_info tree = insert_toplevel_func(tree, this_module_info); if (options.ir) { - let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info); - debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); + let excluded = + options.ir_exclude && + options.ir_exclude.some((pat) => source_filename.indexOf(pat) !== -1); + if (excluded) { + debug.log(1, `EIR: ${source_filename}: excluded via --ir-exclude`); + } else { + let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info, options.ir_exclude_fn); + debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); + } } debug.log(() => escodegenerate(tree)); diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 3a6bddca..e752cee9 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -456,6 +456,24 @@ export class EIREmitter { ); } + case "module_get_exotic": { + // the module object itself as an ejsval (namespace imports). + // JS modules have a link-time global (matches the opencoded + // legacy handleModuleGetExotic); native modules only exist + // at runtime, resolved by name through module_get. + let moduleString = inst.imms.module; + let module_global; + if (moduleString === "%self") module_global = this.v.this_module_global; + else module_global = this.v.import_module_globals.get(moduleString); + if (module_global) { + let rv = this.v.emitEjsvalFromPtr(module_global, "exotic"); + this.values.set(inst, rv); + return rv; + } + let name = this.v.getAtom(String(moduleString)); + return this.emitCallLike(inst, rt.module_get, [name], "exotic"); + } + case "module_slot_load": { let slot_ref = this.moduleSlotRef(inst.imms.module, inst.imms.slot); this.values.set(inst, ir.createLoad(types.EjsValue, slot_ref, "module_slot")); diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 001eb6f4..4b337249 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -103,19 +103,42 @@ function isFoldableLiteral(n) { function collectModuleRefs(toplevelBody, module_infos, this_module_info) { let refs = new Map(); - // named imports from non-native modules + // imports. native modules ("@llvm" etc) share the ModuleInfo slot + // machinery with JS modules — named imports from either kind are slot + // loads, exactly like the legacy %moduleGetSlot path. namespace + // imports bind the module object itself (module_get_exotic); member + // accesses on it are ordinary property gets. if (module_infos) { for (let stmt of toplevelBody) { if (stmt.type !== b.ImportDeclaration) continue; if (!stmt.source_path) continue; let moduleString = stmt.source_path.value; - if (moduleString[0] === "@") continue; // native modules resolve differently let module_info = module_infos.get(moduleString); - if (!module_info || module_info.isNative()) continue; + if (!module_info) continue; for (let spec of stmt.specifiers) { - if (spec.type !== b.ImportSpecifier) continue; // default/namespace fall back - if (!module_info.exports.has(spec.imported.name)) continue; - let export_info = module_info.exports.get(spec.imported.name); + if (spec.type === b.ImportNamespaceSpecifier) { + // module_info rides along so lowering can resolve + // ns.member accesses to slot loads at compile time + // (mirroring new-cc's visitMemberExpression rewrite — + // JS module objects don't support runtime property + // lookup of their exports) + refs.set(spec.local.name, { + exotic: moduleString, + module_info: module_info, + writable: false, + }); + continue; + } + // named/default imports resolve through slot loads, which + // need the module's link-time global — natives don't have + // one (their module object only exists at runtime) + if (module_info.isNative()) continue; + let imported_name; + if (spec.type === b.ImportSpecifier) imported_name = spec.imported.name; + else if (spec.type === b.ImportDefaultSpecifier) imported_name = "default"; + else continue; + if (!module_info.exports.has(imported_name)) continue; + let export_info = module_info.exports.get(imported_name); let entry = { module: moduleString, slot: export_info.slot_num, @@ -241,7 +264,7 @@ function candidateOf(wrapped) { // tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel // function). returns { lowered, fellback } counts. -export function collectEIRFunctions(tree, filename, module_infos, this_module_info) { +export function collectEIRFunctions(tree, filename, module_infos, this_module_info, exclude_fns) { let toplevel = tree.body[0]; let body = toplevel.body.body; @@ -262,6 +285,11 @@ export function collectEIRFunctions(tree, filename, module_infos, this_module_in } let entry = { fnNode: cand.fnNode, name: cand.name, viable: true, reason: null }; candidates.set(cand.name, entry); + if (exclude_fns && exclude_fns.some((pat) => cand.name.indexOf(pat) !== -1)) { + entry.viable = false; + entry.reason = "excluded via --ir-exclude-fn"; + continue; + } if (assigned.has(cand.name)) { entry.viable = false; entry.reason = "reassigned at module scope"; diff --git a/lib/eir/lower.js b/lib/eir/lower.js index f8b8c580..1b28134b 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -280,6 +280,8 @@ class LowerFunction { if (binding === null || binding === undefined) { let ref = this.mod_ctx.refs.get(n.name); if (ref) { + if (ref.exotic !== undefined) + return this.b.emit("module_get_exotic", [], { module: ref.exotic }); if (ref.constval !== undefined) return this.literal(ref.constval); return this.b.emit("module_slot_load", [], { module: ref.module, @@ -480,7 +482,36 @@ class LowerFunction { return strval || this.b.constAtom(""); } + // `ns.member` where ns is a namespace import of a JS module resolves + // to a slot load at compile time (mirroring new-cc's rewrite): the + // module object doesn't answer runtime property lookups for its + // exports. native ("@...") modules DO — they keep the runtime path. + // returns the loaded value, or null if this isn't such an access. + exoticMemberLoad(n) { + if (n.object.type !== b.Identifier) return null; + let binding = this.analysis.resolve(n.object); + if (binding !== null && binding !== undefined) return null; // shadowed + let ref = this.mod_ctx.refs.get(n.object.name); + if (!ref || ref.exotic === undefined || !ref.module_info) return null; + if (ref.exotic[0] === "@") return null; // native: runtime lookup works + let name = null; + if (!n.computed && n.property.type === b.Identifier) name = n.property.name; + else if (n.property.type === b.Literal && typeof n.property.value === "string") + name = n.property.value; + if (name === null || !ref.module_info.exports.has(name)) return null; + let export_info = ref.module_info.exports.get(name); + let cv = export_info.constval; + if (cv && cv.type === b.Literal && (cv.value === null || typeof cv.value !== "object")) + return this.literal(cv); + return this.b.emit("module_slot_load", [], { + module: ref.exotic, + slot: export_info.slot_num, + }); + } + member(n) { + let slotv = this.exoticMemberLoad(n); + if (slotv) return slotv; let obj = this.expr(n.object); if (!n.computed && n.property.type === b.Identifier) return this.b.emit("get_prop_atom", [obj], { atom: n.property.name }); @@ -491,6 +522,19 @@ class LowerFunction { call(n) { let callee, thisArg; if (n.callee.type === b.MemberExpression) { + // ns.member(...) on a JS namespace import: the callee resolves + // to a slot load and `this` is undefined (the legacy rewrite + // turns the member expression into %moduleGetSlot before call + // handling ever sees it) + let slotCallee = this.exoticMemberLoad(n.callee); + if (slotCallee) { + let args = n.arguments.map((a) => this.expr(a)); + return this.b.emit( + "call", + [slotCallee, this.b.constUndefined()].concat(args), + {} + ); + } thisArg = this.expr(n.callee.object); if (!n.callee.computed && n.callee.property.type === b.Identifier) callee = this.b.emit("get_prop_atom", [thisArg], { @@ -576,8 +620,14 @@ class LowerFunction { for (let d of n.declarations) { if (d.id.type !== b.Identifier) throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); - let init = d.init ? this.expr(d.init) : this.b.constUndefined(); let binding = this.analysis.resolve(d.id); + // visible-as-undefined during its own initializer: a + // direct self-reference reads undefined, and a closure + // in the init captures the (env) binding the real value + // is stored into below. free for uncaptured bindings + // (SSA map write only). + this.writeBinding(binding, this.b.constUndefined()); + let init = d.init ? this.expr(d.init) : this.b.constUndefined(); this.writeBinding(binding, init); } return; diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 6ac731b2..6c5f1182 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -264,8 +264,13 @@ export class ScopeAnalysis { for (let d of n.declarations) { if (d.id.type !== b.Identifier) throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); - if (d.init) this.walkExpr(d.init); - // declare after walking the init: `let x = x` refers outward. + // declare BEFORE walking the init: a closure created in + // the initializer must see the binding (`let walk = + // (n) => ... walk(n) ...`), or its recursive reference + // silently resolves to a global. a direct `let x = x` + // reads the pre-initialized undefined (lower.js writes + // undefined before evaluating the init), matching the + // legacy alloca behavior. // var declarations hoist to the function scope; only // let/const are block-scoped. let scope = this.curScope; @@ -274,6 +279,7 @@ export class ScopeAnalysis { } let binding = scope.declare(d.id.name, "local"); this.refs.set(d.id, binding); + if (d.init) this.walkExpr(d.init); } return; case b.FunctionDeclaration: { diff --git a/test/eir-ns1-lib.js b/test/eir-ns1-lib.js new file mode 100644 index 00000000..df09b173 --- /dev/null +++ b/test/eir-ns1-lib.js @@ -0,0 +1,12 @@ +export function greet(name) { + return "hi " + name; +} +export const LIMIT = 10; +export let seen = 0; +export function bump() { + seen = seen + 1; + return seen; +} +export default function dfltFn(x) { + return x * 100; +} diff --git a/test/eir-ns1.js b/test/eir-ns1.js new file mode 100644 index 00000000..38f9cf4d --- /dev/null +++ b/test/eir-ns1.js @@ -0,0 +1,22 @@ +// generator: none +import * as lib from "./eir-ns1-lib"; +import dflt from "./eir-ns1-lib"; + +function useNs(name) { + let g = lib.greet(name); + return `${g}/${lib.LIMIT}`; +} + +function useNsState() { + lib.bump(); + lib.bump(); + return lib.seen; +} + +function useDefault(x) { + return dflt(x); +} + +console.log(useNs("eir")); +console.log(useNsState()); +console.log(useDefault(7)); diff --git a/test/eir-recarrow1.js b/test/eir-recarrow1.js new file mode 100644 index 00000000..03f6b197 --- /dev/null +++ b/test/eir-recarrow1.js @@ -0,0 +1,34 @@ +function countdown() { + let walk = (n) => { + if (n <= 0) return 0; + return walk(n - 1) + 1; + }; + return walk(5); +} + +function namedRec() { + let visit = function (n) { + if (n === 0) return "done"; + return visit(n - 1); + }; + return visit(3); +} + +function walkTree(root) { + let seen = []; + let walk = (n) => { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (let el of n) walk(el); + return; + } + if (n.name) seen.push(n.name); + for (let k of Object.keys(n)) walk(n[k]); + }; + walk(root); + return seen.join(","); +} + +console.log(countdown()); +console.log(namedRec()); +console.log(walkTree({ name: "a", kids: [{ name: "b" }, { name: "c", kids: [{ name: "d" }] }] })); diff --git a/test/expected/eir-ns1.js.expected-out b/test/expected/eir-ns1.js.expected-out new file mode 100644 index 00000000..e43fd73d --- /dev/null +++ b/test/expected/eir-ns1.js.expected-out @@ -0,0 +1,3 @@ +hi eir/10 +2 +700 diff --git a/test/expected/eir-recarrow1.js.expected-out b/test/expected/eir-recarrow1.js.expected-out new file mode 100644 index 00000000..219f401e --- /dev/null +++ b/test/expected/eir-recarrow1.js.expected-out @@ -0,0 +1,3 @@ +5 +done +a,b,c,d From 776ed2767038fb85795f0381d96b1b1ca6087701 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 8 Jul 2026 23:36:46 -0700 Subject: [PATCH 026/146] eir: promote module vars to hidden slots; fix try/finally exception swallow MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Slot promotion — the biggest --ir fallback bucket was functions referencing non-exported mutable module state (esprima's lookahead/ state/index, escodegen's json/renumber, ...): - gather-imports assigns non-exported module-level vars hidden slots on the same counter as exports, so module-global sizing and GC scanning need no changes (num_exports is really num_slots). const-literal declarations stay plain locals (they constant-fold); names with a nested `var` re-declaration are excluded; - DesugarImportExport rewrites promoted declarations to %moduleSetSlot, and new-cc's existing ModuleSlotBinding registration routes every legacy reference through the slot; - promoted entries are private: import resolution, re-export, new-cc's namespace-member rewrite, module-object accessors, and EIR's ns.member/named-import paths all skip them; - EIR reads/writes the same slots via module_slot_load/store on "%self" (const-declared ones are read-only), so mutable module state works from both pipelines against one storage. non-exported `var f = function(){}` siblings used as values now also resolve (the slot holds the one closure, identity-correct); - EJS_NO_PROMOTE= env hook disables promotion per module path (this bisected every bug below). Fixes three latent legacy bugs the promotion exposed, one of them big: 1. try/finally SWALLOWED IN-FLIGHT EXCEPTIONS: the finally-only landingpad branched into the finalizer with a stale cleanup_reason, so after the finalizer ran, execution fell through to try_merge and simply continued. Since DesugarLetLoopVars wraps every `for (let ...)` body in try/finally, every for-let loop silently ate exceptions thrown through it. The landingpad now saves the caught value and a REASON_EXCEPTION, and the finalizer's dispatch rethrows via _ejs_throw (a fresh throw: _ejs_rethrow needs an active exception). test/finallythrow1.js covers throw/nested/break/return paths. 2. new-cc visitAssignmentExpression double-visited the rhs for module bindings, double-wrapping closures (%makeClosureNoEnv twice) and resetting the inner function's scratch_size (crashed on escodegen's isArray). 3. storeValueInDest didn't handle %moduleGetSlot as a store target (for-in/for-of loop variables bound to module slots). EIR additions along the way: - delete of member expressions (delete_prop -> _ejs_op_delete), recovering all of esprima; - hoisted-var semantics: locals are initialized undefined at function entry, so reads before the declaration statement work; - reads in unreachable code (after `while (true)`, after a switch whose cases all return) resolve to undefined instead of throwing. self-hosted --ir coverage: 286/422 functions (was 173), 0 late failures; the --ir-built compiler passes the bootstrap smokes. //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,bootstrap-ir,stage3} green (383 pass / 26 xfail); stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- lib/compiler.js | 55 +++++++++++++++++- lib/eir/builder.js | 14 ++++- lib/eir/emit.js | 9 +++ lib/eir/integrate.js | 32 +++++++++-- lib/eir/lower.js | 22 ++++++- lib/eir/scopes.js | 2 + lib/exitable-scope.js | 1 + lib/module-info.js | 17 ++++++ lib/passes/desugar-import-export.js | 60 +++++++++++++++++++- lib/passes/gather-imports.js | 63 +++++++++++++++++++++ lib/passes/new-cc.js | 9 ++- test/eir-promo1-lib.js | 37 ++++++++++++ test/eir-promo1.js | 10 ++++ test/expected/eir-promo1.js.expected-out | 6 ++ test/expected/finallythrow1.js.expected-out | 8 +++ test/finallythrow1.js | 57 +++++++++++++++++++ 16 files changed, 386 insertions(+), 16 deletions(-) create mode 100644 test/eir-promo1-lib.js create mode 100644 test/eir-promo1.js create mode 100644 test/expected/eir-promo1.js.expected-out create mode 100644 test/expected/finallythrow1.js.expected-out create mode 100644 test/finallythrow1.js diff --git a/lib/compiler.js b/lib/compiler.js index 0d204a27..23cc2158 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -1220,6 +1220,13 @@ class LLVMIRVisitor extends TreeVisitor { [this.getAtom(gname), rhvalue], `globalpropstore_${lhs.arguments[0].name}` ); + } else if (is_intrinsic(lhs, "%moduleGetSlot")) { + // a module-slot-bound variable as a store destination (e.g. a + // for-in/for-of loop variable): store through the slot ref + return ir.createStore( + rhvalue, + this.handleModuleSlotRef(lhs, this.opencode_intrinsics.moduleSetSlot) + ); } else { throw new Error(`unhandled lhs ${escodegenerate(lhs)}`); } @@ -2148,8 +2155,27 @@ class LLVMIRVisitor extends TreeVisitor { let exception = ir.createExtractValue(caught_result, 0, "exception"); if (catch_block) ir.createBr(catch_block); - else if (finally_block) ir.createBr(finally_block); - else throw "this shouldn't happen. a try{} without either a catch{} or finally{}"; + else if (finally_block) { + // finally-only try: run the finalizer, then RETHROW. + // (branching straight to the finalizer with a stale + // cleanup_reason silently swallowed the exception -- + // and DesugarLetLoopVars wraps every `for (let ...)` + // body in exactly this construct.) + if (!this.currentFunction.caught_exception_alloca) + this.currentFunction.caught_exception_alloca = this.createAlloca( + this.currentFunction, + types.EjsValue, + "caught_exception" + ); + let catchval = this.beginCatch(exception); + ir.createStore(catchval, this.currentFunction.caught_exception_alloca); + this.endCatch(); + ir.createStore( + consts.int32(TryExitableScope.REASON_EXCEPTION), + this.currentFunction.cleanup_reason + ); + ir.createBr(finally_block); + } else throw "this shouldn't happen. a try{} without either a catch{} or finally{}"; // if we have a catch clause, create catch_bb if (n.handlers.length > 0) { @@ -2237,6 +2263,28 @@ class LLVMIRVisitor extends TreeVisitor { falloff_tramp ); + if (scope.landing_pad_block && !catch_block) { + // the exception remembered by the finally-only + // landingpad path above resumes here + let exception_tramp = new llvm.BasicBlock("exception_tramp", insertFunc); + this.doInsideBBlock(exception_tramp, () => { + let exc = this.createEjsValueLoad( + this.currentFunction.caught_exception_alloca, + "caught_exc" + ); + // a fresh _ejs_throw of the saved value: the original + // C++ exception ended at the begin/end_catch pair in + // the landingpad (_ejs_rethrow needs an ACTIVE + // exception and would terminate) + this.createCall(this.ejs_runtime.throw, [exc], "", true); + ir.createUnreachable(); + }); + switch_stmt.addCase( + consts.int32(TryExitableScope.REASON_EXCEPTION), + exception_tramp + ); + } + for (let s = 0, e = scope.destinations.length; s < e; s++) { let dest_tramp = new llvm.BasicBlock("dest_tramp", insertFunc); var dest = scope.destinations[s]; @@ -2655,7 +2703,7 @@ class LLVMIRVisitor extends TreeVisitor { if (!this.currentFunction.scratch_area) { throw new Error( - `Internal error: function has no scratch space and makes a [[Call]] call with ${exp.arguments.length} arguments` + `Internal error: function ${this.currentFunction.name} has no scratch space and makes a [[Call]] call with ${exp.arguments.length} arguments (${escodegenerate(exp)})` ); } @@ -3566,6 +3614,7 @@ export function compile(tree, base_output_filename, source_filename, module_info let module_accessors = []; this_module_info.exports.forEach((export_info, key) => { + if (export_info.promoted) return; // hidden slot: no accessors let module_prop = undefined; let f = this_module_info.getExportGetter(key); if (f) { diff --git a/lib/eir/builder.js b/lib/eir/builder.js index 2ee24216..7d32e1a1 100644 --- a/lib/eir/builder.js +++ b/lib/eir/builder.js @@ -162,7 +162,17 @@ export class FunctionBuilder { } else if (block.predEdges.length === 1) { val = this.readVariable(name, block.predEdges[0].inst.block); } else if (block.predEdges.length === 0) { - throw new Error(`EIR: read of undefined variable '${name}' reached entry`); + if (block !== this.fn.entry) { + // an unreachable block (code after `while (true)`, after a + // switch whose every case returns, ...): any value will do. + // the emitter drops unreachable blocks entirely. + let c = new Inst(this.fn, "const", [], { kind: "undefined" }); + c.block = block; + block.insts.unshift(c); + val = c; + } else { + throw new Error(`EIR: read of undefined variable '${name}' reached entry`); + } } else { // break potential cycles with a parameter before recursing let param = block.addParam(name); @@ -227,7 +237,7 @@ export class FunctionBuilder { finish() { for (let b of this.fn.blocks) { - if (!b.sealed) throw new Error(`EIR: block ${b.name} never sealed`); + if (!b.sealed) throw new Error(`EIR: ${this.fn.name}: block ${b.name} never sealed`); } return this.fn; } diff --git a/lib/eir/emit.js b/lib/eir/emit.js index e752cee9..52c5a3c9 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -456,6 +456,15 @@ export class EIREmitter { ); } + case "delete_prop": { + return this.emitCallLike( + inst, + rt.unopdelete, + [this.val(inst.operands[0]), this.val(inst.operands[1])], + "delres" + ); + } + case "module_get_exotic": { // the module object itself as an ejsval (namespace imports). // JS modules have a link-time global (matches the opencoded diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 4b337249..61d267c7 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -21,9 +21,11 @@ // the EIR-emitted function (no closure dispatch). viability is a // fixed point: a candidate depending on a fallen-back sibling falls // back too. -// anything else (non-exported mutable module vars, non-exported siblings -// used as values, namespace/default imports, unsupported syntax) falls -// back per function via LowerNotSupported. +// - non-exported module-level vars promoted to hidden slots by +// gather-imports: module_slot_load/store on "%self" (the legacy +// pipeline routes its accesses through the same slots). +// anything else (non-exported function declarations used as values, +// unsupported syntax) falls back per function via LowerNotSupported. // // all of a file's candidates lower into ONE shared EIR module so direct // calls resolve within it; tagged nodes keep their (emptied) body through @@ -137,8 +139,8 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { if (spec.type === b.ImportSpecifier) imported_name = spec.imported.name; else if (spec.type === b.ImportDefaultSpecifier) imported_name = "default"; else continue; - if (!module_info.exports.has(imported_name)) continue; let export_info = module_info.exports.get(imported_name); + if (!export_info || export_info.promoted) continue; let entry = { module: moduleString, slot: export_info.slot_num, @@ -199,6 +201,28 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { } } + // non-exported module-level vars promoted to hidden slots by + // gather-imports: read/write through the "%self" module global, the + // same storage the legacy pipeline uses after the DesugarImportExport + // rewrite. const-declared ones (non-literal initializers) are + // read-only. + if (this_module_info) { + for (let stmt of toplevelBody) { + if (stmt.type !== b.VariableDeclaration) continue; + for (let d of stmt.declarations) { + if (d.id.type !== b.Identifier) continue; + if (refs.has(d.id.name)) continue; + let export_info = this_module_info.exports.get(d.id.name); + if (!export_info || !export_info.promoted) continue; + refs.set(d.id.name, { + module: "%self", + slot: export_info.slot_num, + writable: stmt.kind !== "const", + }); + } + } + } + return refs; } diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 1b28134b..521f1409 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -97,6 +97,15 @@ class LowerFunction { } } + // hoisted-var semantics: every local is readable (as undefined) + // from function entry, even before its declaration statement runs + // (`use(x); ... if (c) { var x = 5; }`). the declaration-time + // write in VariableDeclaration still handles the per-iteration + // reset of block-scoped lets in loops. + for (let binding of info.bindings) { + if (binding.kind === "local") this.writeBinding(binding, this.b.constUndefined()); + } + // the rest parameter materializes from the trailing arguments if (info.restBinding) { let rest = this.b.emit("rest_args", [], { index: info.params.length }); @@ -355,6 +364,16 @@ class LowerFunction { case "typeof": arg = this.expr(n.argument); return this.b.emit("typeof", [arg], {}); + case "delete": { + // only member expressions (matching the legacy visitUnary) + let m = n.argument; + let obj = this.expr(m.object); + let key; + if (!m.computed && m.property.type === b.Identifier) + key = this.b.constAtom(m.property.name); + else key = this.expr(m.property); + return this.b.emit("delete_prop", [obj, key], {}); + } default: throw LowerNotSupported(`unary operator ${n.operator}`, n.loc); } @@ -498,8 +517,9 @@ class LowerFunction { if (!n.computed && n.property.type === b.Identifier) name = n.property.name; else if (n.property.type === b.Literal && typeof n.property.value === "string") name = n.property.value; - if (name === null || !ref.module_info.exports.has(name)) return null; + if (name === null) return null; let export_info = ref.module_info.exports.get(name); + if (!export_info || export_info.promoted) return null; // promoted slots are private let cv = export_info.constval; if (cv && cv.type === b.Literal && (cv.value === null || typeof cv.value !== "object")) return this.literal(cv); diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 6c5f1182..5e1bef6c 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -437,6 +437,8 @@ export class ScopeAnalysis { this.walkExpr(n.right); return; case b.UnaryExpression: + if (n.operator === "delete" && n.argument.type !== b.MemberExpression) + throw LowerNotSupported("delete of a non-member expression", n.loc); this.walkExpr(n.argument); return; case b.AssignmentExpression: diff --git a/lib/exitable-scope.js b/lib/exitable-scope.js index d503f59c..c7caf1f7 100644 --- a/lib/exitable-scope.js +++ b/lib/exitable-scope.js @@ -116,6 +116,7 @@ export class TryExitableScope extends ExitableScope { } } TryExitableScope.REASON_FALLOFF_TRY = -2; // we fell off the end of the try block +TryExitableScope.REASON_EXCEPTION = -20; // an exception unwound into a finally-only try TryExitableScope.REASON_ERROR = -1; // error condition TryExitableScope.REASON_BREAK = "break"; TryExitableScope.REASON_CONTINUE = "continue"; diff --git a/lib/module-info.js b/lib/module-info.js index 2f0ec467..403c1f94 100644 --- a/lib/module-info.js +++ b/lib/module-info.js @@ -31,6 +31,20 @@ export class ModuleInfo { this.slot_num++; } + // a hidden slot for a non-exported module-level var: it shares the + // export slot array (so allocation sizing and GC scanning need no + // changes) but is private to the module -- import resolution and the + // module-object accessors skip promoted entries. + addPromotedSlot(ident) { + if (this.exports.has(ident)) return; + this.exports.set(ident, { + constval: undefined, + slot_num: this.slot_num, + promoted: true, + }); + this.slot_num++; + } + addImportSource(source_path) { if (this.importList.indexOf(source_path) === -1) this.importList.push(source_path); } @@ -51,6 +65,7 @@ export class JSModuleInfo extends ModuleInfo { getExportGetter(ident) { let export_info = this.exports.get(ident); + if (export_info.promoted) return null; let function_id = b.identifier(`get_export_${ident}`); let loc = { start: { line: 0, column: 0 } }; if (export_info.constval) { @@ -82,6 +97,8 @@ export class JSModuleInfo extends ModuleInfo { } getExportSetter(ident) { + let export_info = this.exports.get(ident); + if (export_info && export_info.promoted) return null; let function_id = b.identifier(`set_export_${ident}`); // we shouldn't generate a setter for const exports return b.functionExpression( diff --git a/lib/passes/desugar-import-export.js b/lib/passes/desugar-import-export.js index 46846eeb..727423e7 100644 --- a/lib/passes/desugar-import-export.js +++ b/lib/passes/desugar-import-export.js @@ -26,7 +26,59 @@ export class DesugarImportExport extends TransformPass { this.exports = []; this.batch_exports = []; - return super.visitFunction(n); + n = super.visitFunction(n); + return this.rewritePromotedVars(n); + } + + // non-exported module-level vars that gather-imports promoted to + // hidden module slots: replace their declarations with + // %moduleSetSlot, exactly like exported declarations. new-cc's + // ModuleSlotBinding registration then routes every reference in + // this file through the slot -- the same storage the EIR pipeline + // uses. + rewritePromotedVars(toplevel) { + let module_info = this.allModules.get(this.filename); + if (!module_info) return toplevel; + + let isPromoted = (d) => { + if (d.id.type !== b.Identifier) return false; + let export_info = module_info.exports.get(d.id.name); + return !!(export_info && export_info.promoted); + }; + + let new_body = []; + for (let stmt of toplevel.body.body) { + if (stmt.type !== b.VariableDeclaration || !stmt.declarations.some(isPromoted)) { + new_body.push(stmt); + continue; + } + // split the declaration, preserving declarator evaluation order + let pending = []; + let flushPending = () => { + if (pending.length === 0) return; + new_body.push(b.variableDeclaration(stmt.kind, pending)); + pending = []; + }; + for (let d of stmt.declarations) { + if (!isPromoted(d)) { + pending.push(d); + continue; + } + flushPending(); + new_body.push( + b.expressionStatement( + intrinsic(moduleSetSlot_id, [ + b.literal(this.filename), + b.literal(d.id.name), + d.init || b.undefinedLit(), + ]) + ) + ); + } + flushPending(); + } + toplevel.body.body = new_body; + return toplevel; } visitImportDeclaration(n) { @@ -62,7 +114,8 @@ export class DesugarImportExport extends TransformPass { // // let ${spec.local} = %import_decl.#{spec.imported} // - if (!module.exports.has(spec.imported.name)) + let imported_info = module.exports.get(spec.imported.name); + if (!imported_info || imported_info.promoted) reportError( ReferenceError, `module '${n.source_path.value}' doesn't export '${spec.imported.name}'`, @@ -124,7 +177,8 @@ export class DesugarImportExport extends TransformPass { ]; for (let spec of n.specifiers) { - if (!this.allModules.get(n.source_path.value).exports.has(spec.local.name)) + let reexport_info = this.allModules.get(n.source_path.value).exports.get(spec.local.name); + if (!reexport_info || reexport_info.promoted) reportError( ReferenceError, `module '${n.source_path.value}' doesn't export '${spec.exported.name}'`, diff --git a/lib/passes/gather-imports.js b/lib/passes/gather-imports.js index b90ef511..4709a355 100644 --- a/lib/passes/gather-imports.js +++ b/lib/passes/gather-imports.js @@ -183,9 +183,72 @@ export function dumpModules() { allModules.forEach((m) => dumpModule(m)); } +// promote non-exported module-level vars to hidden module slots. both +// the legacy pipeline (via the DesugarImportExport rewrite to +// %moduleSetSlot + new-cc's ModuleSlotBinding) and the EIR pipeline (via +// module_slot_load/store) then use the same storage, so functions +// referencing mutable module state can compile on either path. +// +// only DIRECT toplevel declarations promote. a `var` re-declaration of +// the same name nested inside a toplevel statement (`if (x) { var state +// = ... }`) shares the binding but wouldn't be rewritten, so any name +// with such a nested declaration is excluded entirely. `const name = +// ` stays a plain local: it constant-folds instead. +function promoteModuleVars(moduleInfo, tree) { + // debugging: EJS_NO_PROMOTE=substr1,substr2 disables promotion for + // matching module paths (bisecting promotion-related miscompiles) + let no_promote = process.env.EJS_NO_PROMOTE; + if (no_promote) { + for (let pat of no_promote.split(",")) { + if (pat.length > 0 && moduleInfo.path.indexOf(pat) !== -1) return; + } + } + // names declared by `var` nested below a direct toplevel statement + // (but outside any function -- function bodies are their own scope) + let nestedVarNames = new Set(); + let walkNested = (n) => { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (let el of n) walkNested(el); + return; + } + if ( + n.type === b.FunctionDeclaration || + n.type === b.FunctionExpression || + n.type === b.ArrowFunctionExpression + ) + return; + if (n.type === b.VariableDeclaration && n.kind === "var") { + for (let d of n.declarations) { + if (d.id.type === b.Identifier) nestedVarNames.add(d.id.name); + } + } + for (let k of Object.keys(n)) { + if (k === "loc") continue; + walkNested(n[k]); + } + }; + for (let stmt of tree.body) { + if (stmt.type === b.VariableDeclaration) continue; // direct: handled below + walkNested(stmt); + } + + for (let stmt of tree.body) { + if (stmt.type !== b.VariableDeclaration) continue; + for (let d of stmt.declarations) { + if (d.id.type !== b.Identifier) continue; + if (moduleInfo.exports.has(d.id.name)) continue; // already slotted + if (nestedVarNames.has(d.id.name)) continue; + if (stmt.kind === "const" && d.init && d.init.type === b.Literal) continue; + moduleInfo.addPromotedSlot(d.id.name); + } + } +} + function gatherImports(filename, path, top_path, tree, import_vars) { let visitor = new GatherImports(filename, path, top_path, import_vars); visitor.visit(tree); + promoteModuleVars(visitor.moduleInfo, tree); return visitor.importList; } diff --git a/lib/passes/new-cc.js b/lib/passes/new-cc.js index 9fd338ad..0d00fbe7 100644 --- a/lib/passes/new-cc.js +++ b/lib/passes/new-cc.js @@ -456,7 +456,10 @@ class SubstituteVariables extends TransformPass { rv.loc = n.loc; return rv; } else if (ref.binding.type === "module") { - let rv = ref.binding.getStoreIntrinsic(this.visit(rhs)); + // rhs was already visited above; visiting it again + // double-wraps closures (and the second visitFunction + // resets the inner function's scratch_size) + let rv = ref.binding.getStoreIntrinsic(rhs); rv.loc = n.loc; return rv; } else { @@ -536,9 +539,9 @@ class SubstituteVariables extends TransformPass { // rewrite it to use moduleGetSlot. let module_info = this.allModules.get(moduleString.value); - if (!module_info.exports.has(moduleExport)) - throw new Error(`${moduleString.value} doesn't export ${moduleExport}`); // XXX let export_info = module_info.exports.get(moduleExport); + if (!export_info || export_info.promoted) + throw new Error(`${moduleString.value} doesn't export ${moduleExport}`); // XXX let rv = intrinsic(moduleGetSlot_id, [moduleString, b.literal(moduleExport)]); rv.loc = n.loc; diff --git a/test/eir-promo1-lib.js b/test/eir-promo1-lib.js new file mode 100644 index 00000000..7a484241 --- /dev/null +++ b/test/eir-promo1-lib.js @@ -0,0 +1,37 @@ +let counter = 0; +var state = { calls: 0 }; +const registry = []; + +var describe = function (tag) { + return `${tag}:${counter}:${state.calls}`; +}; + +function useAsValue(f, tag) { + return f(tag); +} + +export function tick() { + counter += 1; + state.calls++; + registry.push(counter); + return counter; +} + +export function readAll() { + return `${counter}/${state.calls}/${registry.join(",")}/${describe("r")}`; +} + +export function viaValue() { + return useAsValue(describe, "v"); +} + +// legacy-side interop: toplevel code (legacy) mutates the same storage +counter = 100; +state.calls = 50; + +export function makeCloser() { + return function () { + counter += 1000; + return counter; + }; +} diff --git a/test/eir-promo1.js b/test/eir-promo1.js new file mode 100644 index 00000000..657239b6 --- /dev/null +++ b/test/eir-promo1.js @@ -0,0 +1,10 @@ +// generator: none +import { tick, readAll, viaValue, makeCloser } from "./eir-promo1-lib"; + +console.log(tick()); +console.log(tick()); +console.log(readAll()); +console.log(viaValue()); +let c = makeCloser(); +console.log(c()); +console.log(readAll()); diff --git a/test/expected/eir-promo1.js.expected-out b/test/expected/eir-promo1.js.expected-out new file mode 100644 index 00000000..c608f1a8 --- /dev/null +++ b/test/expected/eir-promo1.js.expected-out @@ -0,0 +1,6 @@ +101 +102 +102/52/101,102/r:102:52 +v:102:52 +1102 +1102/52/101,102/r:1102:52 diff --git a/test/expected/finallythrow1.js.expected-out b/test/expected/finallythrow1.js.expected-out new file mode 100644 index 00000000..5e0891c5 --- /dev/null +++ b/test/expected/finallythrow1.js.expected-out @@ -0,0 +1,8 @@ +finally ran +caught: boom +caught: found:2 +caught: inner +5,f0,6,f1,f2 +fr ran +from-try +no throw diff --git a/test/finallythrow1.js b/test/finallythrow1.js new file mode 100644 index 00000000..37b7021a --- /dev/null +++ b/test/finallythrow1.js @@ -0,0 +1,57 @@ +function finOnly() { + try { + throw new Error("boom"); + } finally { + console.log("finally ran"); + } + return "SWALLOWED"; +} + +function forLetThrow(items) { + for (let i = 0; i < items.length; i++) { + if (items[i] === 3) throw new Error("found:" + i); + } + return "no throw"; +} + +function nestedFinally() { + let order = []; + try { + try { + throw new Error("inner"); + } finally { + order.push("f1"); + } + } finally { + order.push("f2"); + } + return order.join(","); +} + +function finallyBreak(items) { + let seen = []; + for (let i = 0; i < items.length; i++) { + try { + if (items[i] < 0) break; + seen.push(items[i]); + } finally { + seen.push("f" + i); + } + } + return seen.join(","); +} + +function finallyReturn() { + try { + return "from-try"; + } finally { + console.log("fr ran"); + } +} + +try { console.log(finOnly()); } catch (e) { console.log("caught: " + e.message); } +try { console.log(forLetThrow([1, 2, 3])); } catch (e) { console.log("caught: " + e.message); } +try { console.log(nestedFinally()); } catch (e) { console.log("caught: " + e.message); } +console.log(finallyBreak([5, 6, -1, 7])); +console.log(finallyReturn()); +console.log(forLetThrow([1, 2])); From 7366e39ad91fa0e783ab4209f0150831e72fbba3 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 8 Jul 2026 23:54:09 -0700 Subject: [PATCH 027/146] eir: promote function declarations; self-references resolve via slots MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Function declarations now promote to module slots exactly like exported functions (the declaration becomes %moduleSetSlot at its source position — same hoisting caveat as exports). This breaks the viability poisoning cascade: a reference to a fallen-back sibling is now just a slot load of its (thunk) closure, so one unsupported function no longer drags every transitive caller down with it. `new Node()`-style constructor uses and functions-as-values resolve the same way. Self-references in value position or from nested functions are treated as free module-scope names instead of hard fallbacks — integration resolves them through the candidate's own slot. self-hosted --ir coverage: 405/422 functions, 96% (was 286), 0 late failures. The 17 survivors are genuine feature tails: spread (4), `arguments` (3), try/finally (2), ObjectPattern decls (2), per- iteration loop envs (2), and 4 class-declaration references. //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,bootstrap-ir,stage3} green (383 pass / 26 xfail); stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- lib/eir/integrate.js | 24 +++++++++++++++++------- lib/eir/scopes.js | 18 +++++++++++------- lib/passes/desugar-import-export.js | 18 ++++++++++++++++++ lib/passes/gather-imports.js | 26 +++++++++++++++++++------- 4 files changed, 65 insertions(+), 21 deletions(-) diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 61d267c7..03085835 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -208,16 +208,26 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // read-only. if (this_module_info) { for (let stmt of toplevelBody) { - if (stmt.type !== b.VariableDeclaration) continue; - for (let d of stmt.declarations) { - if (d.id.type !== b.Identifier) continue; - if (refs.has(d.id.name)) continue; - let export_info = this_module_info.exports.get(d.id.name); + if (stmt.type === b.VariableDeclaration) { + for (let d of stmt.declarations) { + if (d.id.type !== b.Identifier) continue; + if (refs.has(d.id.name)) continue; + let export_info = this_module_info.exports.get(d.id.name); + if (!export_info || !export_info.promoted) continue; + refs.set(d.id.name, { + module: "%self", + slot: export_info.slot_num, + writable: stmt.kind !== "const", + }); + } + } else if (stmt.type === b.FunctionDeclaration && stmt.id) { + if (refs.has(stmt.id.name)) continue; + let export_info = this_module_info.exports.get(stmt.id.name); if (!export_info || !export_info.promoted) continue; - refs.set(d.id.name, { + refs.set(stmt.id.name, { module: "%self", slot: export_info.slot_num, - writable: stmt.kind !== "const", + writable: true, }); } } diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 5e1bef6c..3305328a 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -227,13 +227,17 @@ export class ScopeAnalysis { } if (binding.kind === "self") { - // only direct recursion from the function itself is supported; - // a nested function would need the closure value in its env, - // and value-position uses would need the closure itself. - if (binding.fnInfo !== this.curFn) - throw LowerNotSupported("self-reference from a nested function", idNode.loc); - if (!isCallee) - throw LowerNotSupported("function self-reference as a value", idNode.loc); + // direct recursion from the function itself stays a direct + // call. anything else (value-position uses, references from + // nested functions) is treated as a free module-scope name: + // integration resolves it through the module slot when the + // candidate is exported or promoted, and falls back otherwise. + if (binding.fnInfo !== this.curFn || !isCallee) { + this.refs.set(idNode, null); + this.globalNames.add(idNode.name); + if (!isCallee) this.globalValueNames.add(idNode.name); + return null; + } return binding; } diff --git a/lib/passes/desugar-import-export.js b/lib/passes/desugar-import-export.js index 727423e7..212393de 100644 --- a/lib/passes/desugar-import-export.js +++ b/lib/passes/desugar-import-export.js @@ -48,6 +48,24 @@ export class DesugarImportExport extends TransformPass { let new_body = []; for (let stmt of toplevel.body.body) { + if (stmt.type === b.FunctionDeclaration && stmt.id) { + let export_info = module_info.exports.get(stmt.id.name); + if (export_info && export_info.promoted) { + // mirror the exported-function rewrite (the node is + // mutated in place so EIR tags survive) + stmt.type = b.FunctionExpression; + new_body.push( + b.expressionStatement( + intrinsic(moduleSetSlot_id, [ + b.literal(this.filename), + b.literal(stmt.id.name), + stmt, + ]) + ) + ); + continue; + } + } if (stmt.type !== b.VariableDeclaration || !stmt.declarations.some(isPromoted)) { new_body.push(stmt); continue; diff --git a/lib/passes/gather-imports.js b/lib/passes/gather-imports.js index 4709a355..da9c0dc5 100644 --- a/lib/passes/gather-imports.js +++ b/lib/passes/gather-imports.js @@ -234,13 +234,25 @@ function promoteModuleVars(moduleInfo, tree) { } for (let stmt of tree.body) { - if (stmt.type !== b.VariableDeclaration) continue; - for (let d of stmt.declarations) { - if (d.id.type !== b.Identifier) continue; - if (moduleInfo.exports.has(d.id.name)) continue; // already slotted - if (nestedVarNames.has(d.id.name)) continue; - if (stmt.kind === "const" && d.init && d.init.type === b.Literal) continue; - moduleInfo.addPromotedSlot(d.id.name); + if (stmt.type === b.VariableDeclaration) { + for (let d of stmt.declarations) { + if (d.id.type !== b.Identifier) continue; + if (moduleInfo.exports.has(d.id.name)) continue; // already slotted + if (nestedVarNames.has(d.id.name)) continue; + if (stmt.kind === "const" && d.init && d.init.type === b.Literal) continue; + moduleInfo.addPromotedSlot(d.id.name); + } + } else if (stmt.type === b.FunctionDeclaration && stmt.id) { + // function declarations promote too: their slot holds the one + // closure, so references from either pipeline (calls to + // fallen-back siblings, value uses, `new Foo()`) resolve + // identically. the declaration becomes a %moduleSetSlot at + // its source position, so -- exactly like exported functions + // today -- hoisting across toplevel *initialization* code is + // lost. + if (moduleInfo.exports.has(stmt.id.name)) continue; + if (nestedVarNames.has(stmt.id.name)) continue; + moduleInfo.addPromotedSlot(stmt.id.name); } } } From 935112a0e7d735ca0f6fd8146abc390c2df03dd2 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 01:22:45 -0700 Subject: [PATCH 028/146] eir: class promotion, arguments object, object-pattern declarations MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - class declarations promote to module slots like functions (classes don't hoist, so the %moduleSetSlot rewrite at the source position is exactly their declaration semantics); - `arguments` binds to a synthetic per-function local filled by the new args_obj op (_ejs_arguments_new on the raw argc/args) in the prologue; arrows resolve to the nearest non-arrow function's binding and capture it through the env chain like any local; - shallow object-pattern declarations (`let { a, b: c, d = dflt } = e`) lower as get_prop_atom chains with SSA default merges. NOTE: EIR supports pattern defaults but the legacy DesugarDestructuring PANICS on AssignmentPattern — suite tests stick to the shared subset; - ast-builder now exports AssignmentPattern (it was never defined, so `b.AssignmentPattern` comparisons silently never matched). Also fixes another latent legacy bug: `delete o[k]` (computed key) read `.property.name` — undefined for anything computed — and deleted the property literally named "undefined". The key expression is now evaluated. eir-syntax4 covers arguments/patterns/delete/unreachable- code shapes against node output. self-hosted --ir coverage: 413/422 functions (98%), 0 late failures. The 9 survivors: spread calls (4), per-iteration loop envs (3), try/finally (2). //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,bootstrap-ir,stage3} green (384 pass / 26 xfail); stage2/stage3 fixed point holds (byte-identical modulo embedded filename). Co-Authored-By: Claude Fable 5 --- lib/ast-builder.js | 1 + lib/compiler.js | 20 +++++--- lib/eir/emit.js | 9 ++++ lib/eir/integrate.js | 5 +- lib/eir/lower.js | 41 ++++++++++++++++ lib/eir/ops.js | 2 + lib/eir/scopes.js | 58 ++++++++++++++++++++++- lib/passes/desugar-import-export.js | 9 ++-- lib/passes/gather-imports.js | 6 +++ test/eir-syntax4.js | 45 ++++++++++++++++++ test/expected/eir-syntax4.js.expected-out | 6 +++ 11 files changed, 190 insertions(+), 12 deletions(-) create mode 100644 test/eir-syntax4.js create mode 100644 test/expected/eir-syntax4.js.expected-out diff --git a/lib/ast-builder.js b/lib/ast-builder.js index 523bfa41..1cd43565 100644 --- a/lib/ast-builder.js +++ b/lib/ast-builder.js @@ -4,6 +4,7 @@ export const ArrayExpression = "ArrayExpression"; export const ArrayPattern = "ArrayPattern"; +export const AssignmentPattern = "AssignmentPattern"; export const ArrowFunctionExpression = "ArrowFunctionExpression"; export const AssignmentExpression = "AssignmentExpression"; export const BinaryExpression = "BinaryExpression"; diff --git a/lib/compiler.js b/lib/compiler.js index 23cc2158..5e738c81 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -1422,14 +1422,22 @@ class LLVMIRVisitor extends TreeVisitor { if (n.operator === "delete") { if (n.argument.type !== b.MemberExpression) throw "unhandled delete syntax"; - let fake_literal = { - type: b.Literal, - value: n.argument.property.name, - raw: `'${n.argument.property.name}'`, - }; + // computed keys (`delete o[k]`) evaluate the key expression; + // the old fake-literal path read `.property.name` (undefined + // for anything computed) and deleted the wrong property + let prop; + if (n.argument.computed) { + prop = n.argument.property; + } else { + prop = { + type: b.Literal, + value: n.argument.property.name, + raw: `'${n.argument.property.name}'`, + }; + } return this.createCall( callee, - [this.visitOrNull(n.argument.object), this.visit(fake_literal)], + [this.visitOrNull(n.argument.object), this.visit(prop)], "result" ); } else if (n.operator === "!") { diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 52c5a3c9..6c5349f3 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -705,6 +705,15 @@ export class EIREmitter { return rv; } + case "args_obj": { + return this.emitCallLike( + inst, + rt.arguments_new, + [this.fn_argc, this.fn_args_ptr], + "argsobj" + ); + } + case "prop_iter_new": { return this.emitCallLike( inst, diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 03085835..91947c23 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -220,7 +220,10 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { writable: stmt.kind !== "const", }); } - } else if (stmt.type === b.FunctionDeclaration && stmt.id) { + } else if ( + (stmt.type === b.FunctionDeclaration || stmt.type === b.ClassDeclaration) && + stmt.id + ) { if (refs.has(stmt.id.name)) continue; let export_info = this_module_info.exports.get(stmt.id.name); if (!export_info || !export_info.promoted) continue; diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 521f1409..2ab7d1f7 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -106,6 +106,12 @@ class LowerFunction { if (binding.kind === "local") this.writeBinding(binding, this.b.constUndefined()); } + // the arguments object, if referenced anywhere in this function + if (info.usesArguments) { + let a = this.b.emit("args_obj", [], {}); + this.writeBinding(info.argumentsBinding, a); + } + // the rest parameter materializes from the trailing arguments if (info.restBinding) { let rest = this.b.emit("rest_args", [], { index: info.params.length }); @@ -638,6 +644,10 @@ class LowerFunction { return; case b.VariableDeclaration: for (let d of n.declarations) { + if (d.id.type === b.ObjectPattern) { + this.lowerObjectPatternDecl(d); + continue; + } if (d.id.type !== b.Identifier) throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); let binding = this.analysis.resolve(d.id); @@ -815,6 +825,37 @@ class LowerFunction { this.b.setInsertPoint(exit); } + lowerObjectPatternDecl(d) { + let src = d.init ? this.expr(d.init) : this.b.constUndefined(); + for (let prop of d.id.properties) { + let keyName = + prop.key.type === b.Identifier ? prop.key.name : String(prop.key.value); + let target = prop.value; + let dflt = null; + if (target.type === b.AssignmentPattern) { + dflt = target.right; + target = target.left; + } + let binding = this.analysis.resolve(target); + let v = this.b.emit("get_prop_atom", [src], { atom: keyName }); + this.writeBinding(binding, v); + if (dflt) { + let isundef = this.b.emit("strict_eq", [v, this.b.constUndefined()], {}); + let ubool = this.b.emit("to_boolean", [isundef], {}); + let dflt_bb = this.b.newBlock(`pat_default_${keyName}`); + let join_bb = this.b.newBlock(`pat_join_${keyName}`); + this.b.condBr(ubool, dflt_bb, [], join_bb, []); + this.b.sealBlock(dflt_bb); + this.b.setInsertPoint(dflt_bb); + let dv = this.expr(dflt); + this.writeBinding(binding, dv); + this.b.br(join_bb, []); + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + } + } + } + // mirrors the legacy DesugarForOf expansion: iterable[Symbol.iterator]() // once, then `next()` per iteration, testing `.done` and binding `.value` forOfStmt(n) { diff --git a/lib/eir/ops.js b/lib/eir/ops.js index c3d05baf..340c9a04 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -109,6 +109,8 @@ export const OPS = { // the rest-parameter array: arguments from index imms.index onward // (empty array if argc <= index) rest_args: { arity: 0, effects: E.GC, imms: ["index"] }, + // the arguments object (built from the raw argc/args) + args_obj: { arity: 0, effects: E.THROW | E.GC }, // --- for-in property iteration ------------------------------------------ // the iterator value is an opaque non-ejsval; it must only be consumed diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 3305328a..15ba552f 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -216,8 +216,29 @@ export class ScopeAnalysis { this.refs.set(idNode, null); return null; } - if (idNode.name === "arguments") - throw LowerNotSupported("the arguments object", idNode.loc); + if (idNode.name === "arguments") { + // bind to the nearest non-arrow function's (synthetic) + // arguments object, created in its prologue + let f = this.curFn; + while (f && f.node.type === b.ArrowFunctionExpression) f = f.parent; + if (!f) throw LowerNotSupported("`arguments` outside a function", idNode.loc); + if (!f.argumentsBinding) { + f.argumentsBinding = new Binding("arguments", "local", f); + f.bindings.push(f.argumentsBinding); + f.usesArguments = true; + } + let abinding = f.argumentsBinding; + this.refs.set(idNode, abinding); + if (abinding.fnInfo !== this.curFn) { + abinding.captured = true; + let g = this.curFn; + while (g && g !== abinding.fnInfo) { + g.needsParentEnv = true; + g = g.parent; + } + } + return abinding; + } let binding = this.curScope.lookup(idNode.name); this.refs.set(idNode, binding); // null = global if (!binding) { @@ -266,6 +287,10 @@ export class ScopeAnalysis { } case b.VariableDeclaration: for (let d of n.declarations) { + if (d.id.type === b.ObjectPattern) { + this.declareObjectPattern(n, d); + continue; + } if (d.id.type !== b.Identifier) throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); // declare BEFORE walking the init: a closure created in @@ -420,6 +445,35 @@ export class ScopeAnalysis { } } + // `let { a, b: c, d = dflt } = init` — shallow object patterns only + declareObjectPattern(declStmt, d) { + let scope = this.curScope; + if (declStmt.kind === "var") { + while (!scope.isFnTop) scope = scope.parent; + } + for (let prop of d.id.properties) { + if (prop.computed) + throw LowerNotSupported("computed key in declaration pattern", declStmt.loc); + if (prop.key.type !== b.Identifier && prop.key.type !== b.Literal) + throw LowerNotSupported("declaration pattern key", declStmt.loc); + let target = prop.value; + let dflt = null; + if (target.type === b.AssignmentPattern) { + dflt = target.right; + target = target.left; + } + if (target.type !== b.Identifier) + throw LowerNotSupported( + `nested declaration pattern ${target.type}`, + declStmt.loc + ); + let binding = scope.declare(target.name, "local"); + this.refs.set(target, binding); + if (dflt) this.walkExpr(dflt); + } + if (d.init) this.walkExpr(d.init); + } + // --- expressions ------------------------------------------------------------ walkExpr(n) { diff --git a/lib/passes/desugar-import-export.js b/lib/passes/desugar-import-export.js index 212393de..93102f26 100644 --- a/lib/passes/desugar-import-export.js +++ b/lib/passes/desugar-import-export.js @@ -48,12 +48,15 @@ export class DesugarImportExport extends TransformPass { let new_body = []; for (let stmt of toplevel.body.body) { - if (stmt.type === b.FunctionDeclaration && stmt.id) { + if ((stmt.type === b.FunctionDeclaration || stmt.type === b.ClassDeclaration) && stmt.id) { let export_info = module_info.exports.get(stmt.id.name); if (export_info && export_info.promoted) { - // mirror the exported-function rewrite (the node is + // mirror the exported-declaration rewrite (the node is // mutated in place so EIR tags survive) - stmt.type = b.FunctionExpression; + stmt.type = + stmt.type === b.FunctionDeclaration + ? b.FunctionExpression + : b.ClassExpression; new_body.push( b.expressionStatement( intrinsic(moduleSetSlot_id, [ diff --git a/lib/passes/gather-imports.js b/lib/passes/gather-imports.js index da9c0dc5..79391ee4 100644 --- a/lib/passes/gather-imports.js +++ b/lib/passes/gather-imports.js @@ -242,6 +242,12 @@ function promoteModuleVars(moduleInfo, tree) { if (stmt.kind === "const" && d.init && d.init.type === b.Literal) continue; moduleInfo.addPromotedSlot(d.id.name); } + } else if (stmt.type === b.ClassDeclaration && stmt.id) { + // classes don't hoist, so the setSlot rewrite at the source + // position is exactly their declaration semantics + if (moduleInfo.exports.has(stmt.id.name)) continue; + if (nestedVarNames.has(stmt.id.name)) continue; + moduleInfo.addPromotedSlot(stmt.id.name); } else if (stmt.type === b.FunctionDeclaration && stmt.id) { // function declarations promote too: their slot holds the one // closure, so references from either pipeline (calls to diff --git a/test/eir-syntax4.js b/test/eir-syntax4.js new file mode 100644 index 00000000..c861a624 --- /dev/null +++ b/test/eir-syntax4.js @@ -0,0 +1,45 @@ +function argsLen() { + return arguments.length; +} + +function argsSum() { + let s = 0; + for (var i = 0; i < arguments.length; i++) s += arguments[i]; + return s; +} + +function argsArrow() { + let g = () => arguments.length + ":" + arguments[0]; + return g(); +} + +function objPat(o) { + // NOTE: no pattern defaults here — the legacy pipeline's + // DesugarDestructuring panics on AssignmentPattern (EIR supports + // them, but suite tests must pass both pipelines) + let { a, b: c } = o; + let d = o.d === undefined ? 9 : o.d; + return `${a}/${c}/${d}`; +} + +function delMember(o) { + delete o.x; + delete o["y"]; + return JSON.stringify(o); +} + +function afterInfinite(n) { + while (true) { + if (n > 2) break; + n++; + } + var node = n * 10; + return node; +} + +console.log(argsLen(), argsLen(1, 2, 3)); +console.log(argsSum(1, 2, 3, 4)); +console.log(argsArrow("x", "y")); +console.log(objPat({ a: 1, b: 2 }), "|", objPat({ a: 1, b: 2, d: 3 })); +console.log(delMember({ x: 1, y: 2, z: 3 })); +console.log(afterInfinite(0)); diff --git a/test/expected/eir-syntax4.js.expected-out b/test/expected/eir-syntax4.js.expected-out new file mode 100644 index 00000000..025817ac --- /dev/null +++ b/test/expected/eir-syntax4.js.expected-out @@ -0,0 +1,6 @@ +0 3 +10 +2:x +1/2/9 | 1/2/3 +{"z":3} +30 From 8648a96e849b818020a2527493cb28f04a812989 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 17:19:19 -0700 Subject: [PATCH 029/146] eir: try/finally via finalizer duplication MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The keystone gap for retiring the legacy pipeline: try/finally lowers natively. One finalizer copy on the normal completion path, one in a synthetic catch block that rethrows, and a copy at every abrupt exit that crosses the finally boundary (return, break, continue) — tracked by a finally-context stack recording break/continue/handler depths at entry. Each exit-site copy runs with the crossed contexts and their unwind handlers removed, so: - a return/break inside a finalizer overrides in-flight control transfer, per spec (the copy just terminates the block first); - an exception during a finalizer copy propagates without re-running that finalizer; - nested finallys run innermost-out. try now accepts catch and/or finally in any combination (finally-only included). esprima's parse/tokenize — the last try/finally holdouts — lower. self-hosted --ir coverage: 415/422, 0 late failures. Remaining 7: spread calls (4) and per-iteration loop envs (3). //:test-{eir,stage0,stage0-ir,stage1,stage1-ir,bootstrap-ir,stage3} green (385 pass / 26 xfail); stage2/stage3 fixed point holds. Co-Authored-By: Claude Fable 5 --- lib/eir/lower.js | 110 ++++++++++++++++++++- lib/eir/scopes.js | 30 +++--- test/eir-finally1.js | 80 +++++++++++++++ test/expected/eir-finally1.js.expected-out | 7 ++ 4 files changed, 210 insertions(+), 17 deletions(-) create mode 100644 test/eir-finally1.js create mode 100644 test/expected/eir-finally1.js.expected-out diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 2ab7d1f7..0b9f2b14 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -79,6 +79,10 @@ class LowerFunction { // switch to the enclosing loop). this.breakTargets = []; this.continueTargets = []; + // active try/finally contexts. abrupt exits (return, break, + // continue) crossing a finally boundary lower a fresh copy of each + // crossed finalizer at the exit site (finalizer duplication). + this.finallyCtx = []; // environment setup this.curEnv = this.envParam; @@ -682,9 +686,14 @@ class LowerFunction { return this.forInStmt(n); case b.SwitchStatement: return this.switchStmt(n); - case b.ReturnStatement: - this.b.ret(n.argument ? this.expr(n.argument) : this.b.constUndefined()); + case b.ReturnStatement: { + let rv = n.argument ? this.expr(n.argument) : this.b.constUndefined(); + if (this.finallyCtx.length > 0) { + if (this.runFinalizers(0)) return; // a finalizer overrode control + } + this.b.ret(rv); return; + } case b.ThrowStatement: this.b.throwValue(this.expr(n.argument)); return; @@ -693,13 +702,23 @@ class LowerFunction { case b.BreakStatement: { if (n.label || this.breakTargets.length === 0) throw LowerNotSupported("break outside plain loop/switch", n.loc); - this.b.br(this.breakTargets[this.breakTargets.length - 1], []); + let targetLen = this.breakTargets.length; + let firstCrossed = this.finallyCtx.findIndex((c) => c.breakDepth >= targetLen); + if (firstCrossed !== -1) { + if (this.runFinalizers(firstCrossed)) return; + } + this.b.br(this.breakTargets[targetLen - 1], []); return; } case b.ContinueStatement: { if (n.label || this.continueTargets.length === 0) throw LowerNotSupported("continue outside plain loop", n.loc); - this.b.br(this.continueTargets[this.continueTargets.length - 1], []); + let targetLen = this.continueTargets.length; + let firstCrossed = this.finallyCtx.findIndex((c) => c.continueDepth >= targetLen); + if (firstCrossed !== -1) { + if (this.runFinalizers(firstCrossed)) return; + } + this.b.br(this.continueTargets[targetLen - 1], []); return; } case b.EmptyStatement: @@ -977,7 +996,33 @@ class LowerFunction { this.b.setInsertPoint(exit); } + // lower fresh copies of the finalizers from index `from` (outermost of + // the crossed set) inward... actually innermost-first: contexts at + // indexes [from..top] are crossed; run top..from. each copy runs with + // the crossed contexts (and their unwind handlers) removed, so a + // return/break inside a finalizer overrides control per spec, and an + // exception during the copy propagates without re-running it. + // returns true if a finalizer terminated the current block. + runFinalizers(from) { + let savedCtx = this.finallyCtx; + let savedHandlers = this.b.handlers; + for (let i = savedCtx.length - 1; i >= from; i--) { + this.finallyCtx = savedCtx.slice(0, i); + this.b.handlers = savedHandlers.slice(0, savedCtx[i].handlerDepth); + this.stmt(savedCtx[i].node); + if (this.b.cur.terminated) { + this.finallyCtx = savedCtx; + this.b.handlers = savedHandlers; + return true; + } + } + this.finallyCtx = savedCtx; + this.b.handlers = savedHandlers; + return false; + } + tryStmt(n) { + if (n.finalizer) return this.tryFinallyStmt(n); let handler = n.handlers[0]; let catch_bb = this.b.newCatchBlock("catch"); let join_bb = this.b.newBlock("try_join"); @@ -999,6 +1044,63 @@ class LowerFunction { this.b.setInsertPoint(join_bb); } + // try/finally via finalizer duplication: one copy on the normal path, + // one in a synthetic catch that rethrows, and copies at each abrupt + // exit site (see runFinalizers). + tryFinallyStmt(n) { + let handler = n.handlers && n.handlers.length > 0 ? n.handlers[0] : null; + let fin_catch = this.b.newCatchBlock("finally_catch"); + let join_bb = this.b.newBlock("finally_join"); + + this.finallyCtx.push({ + node: n.finalizer, + breakDepth: this.breakTargets.length, + continueDepth: this.continueTargets.length, + handlerDepth: this.b.handlers.length, + }); + this.b.pushHandler(fin_catch); + + if (handler) { + let catch_bb = this.b.newCatchBlock("catch"); + let inner_join = this.b.newBlock("catch_join"); + this.b.pushHandler(catch_bb); + this.stmt(n.block); + this.b.popHandler(); + if (!this.b.cur.terminated) this.b.br(inner_join, []); + this.b.sealBlock(catch_bb); + this.b.setInsertPoint(catch_bb); + if (handler.param) { + let binding = this.analysis.resolve(handler.param); + this.writeBinding(binding, catch_bb.params[0]); + } + this.stmt(handler.body); + if (!this.b.cur.terminated) this.b.br(inner_join, []); + this.b.sealBlock(inner_join); + this.b.setInsertPoint(inner_join); + } else { + this.stmt(n.block); + } + + this.b.popHandler(); + this.finallyCtx.pop(); + + // normal-completion copy + if (!this.b.cur.terminated) { + this.stmt(n.finalizer); + if (!this.b.cur.terminated) this.b.br(join_bb, []); + } + + // exceptional copy: finalizer, then rethrow + this.b.sealBlock(fin_catch); + this.b.setInsertPoint(fin_catch); + let exc = fin_catch.params[0]; + this.stmt(n.finalizer); + if (!this.b.cur.terminated) this.b.throwValue(exc); + + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + } + finish() { if (!this.b.cur.terminated) this.b.ret(this.b.constUndefined()); return this.b.finish(); diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 15ba552f..dafd7a0a 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -417,21 +417,25 @@ export class ScopeAnalysis { this.walkExpr(n.argument); return; case b.TryStatement: { - if (n.finalizer) - throw LowerNotSupported("try/finally (desugar it first)", n.loc); - if (!n.handlers || n.handlers.length !== 1) - throw LowerNotSupported("try without exactly one catch", n.loc); + let nhandlers = n.handlers ? n.handlers.length : 0; + if (nhandlers > 1) + throw LowerNotSupported("try with multiple catch clauses", n.loc); + if (nhandlers === 0 && !n.finalizer) + throw LowerNotSupported("try without catch or finally", n.loc); this.walkStmt(n.block); - let handler = n.handlers[0]; - this.curScope = new LexScope(this.curScope, this.curFn); - if (handler.param) { - if (handler.param.type !== b.Identifier) - throw LowerNotSupported("catch parameter pattern", n.loc); - let binding = this.curScope.declare(handler.param.name, "catch"); - this.refs.set(handler.param, binding); + if (nhandlers === 1) { + let handler = n.handlers[0]; + this.curScope = new LexScope(this.curScope, this.curFn); + if (handler.param) { + if (handler.param.type !== b.Identifier) + throw LowerNotSupported("catch parameter pattern", n.loc); + let binding = this.curScope.declare(handler.param.name, "catch"); + this.refs.set(handler.param, binding); + } + this.walkStmt(handler.body); + this.curScope = this.curScope.parent; } - this.walkStmt(handler.body); - this.curScope = this.curScope.parent; + if (n.finalizer) this.walkStmt(n.finalizer); return; } case b.BreakStatement: diff --git a/test/eir-finally1.js b/test/eir-finally1.js new file mode 100644 index 00000000..54807cff --- /dev/null +++ b/test/eir-finally1.js @@ -0,0 +1,80 @@ +function order(g, log) { + try { + log.push("try"); + g(); + log.push("after"); + } finally { + log.push("finally"); + } + return log.join(","); +} + +function retThrough(v) { + let log = []; + function inner() { + try { + return "ret:" + v; + } finally { + log.push("fin"); + } + } + return inner() + "/" + log.join(","); +} + +function breakThrough(xs) { + let seen = []; + for (let i = 0; i < xs.length; i++) { + try { + if (xs[i] < 0) break; + seen.push(xs[i]); + } finally { + seen.push("f" + i); + } + } + return seen.join(","); +} + +function nested() { + let log = []; + function inner() { + try { + try { + return "v"; + } finally { + log.push("f1"); + } + } finally { + log.push("f2"); + } + } + return inner() + "/" + log.join(","); +} + +function override() { + try { + return "from-try"; + } finally { + return "from-finally"; + } +} + +function excPath(log) { + try { + try { + throw new Error("boom"); + } finally { + log.push("fin"); + } + } catch (e) { + log.push("caught:" + e.message); + } + return log.join(","); +} + +console.log(order(function () {}, [])); +try { console.log(order(function () { throw new Error("x"); }, [])); } catch (e) { console.log("threw"); } +console.log(retThrough(7)); +console.log(breakThrough([5, 6, -1, 9])); +console.log(nested()); +console.log(override()); +console.log(excPath([])); diff --git a/test/expected/eir-finally1.js.expected-out b/test/expected/eir-finally1.js.expected-out new file mode 100644 index 00000000..1779cc1f --- /dev/null +++ b/test/expected/eir-finally1.js.expected-out @@ -0,0 +1,7 @@ +try,after,finally +threw +ret:7/fin +5,f0,6,f1,f2 +v/f1,f2 +from-finally +fin,caught:boom From 0cbca71041bf075e593f96cd1326cab2eb7cf067 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 18:02:29 -0700 Subject: [PATCH 030/146] eir: %-intrinsic lowering + DesugarSpread pre-EIR (phase 2 start) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The general %-intrinsic mechanism: pre-EIR desugar passes rewrite constructs lowering has no native form for into %-intrinsic calls, and EIR lowers those through the table in lib/eir/intrinsics.js (either a dedicated op or a call_runtime mapping). scopes.js consults the same table to reject unknown intrinsics early, keeping the late-failure discipline intact. DesugarSpread is the first hoisted pass (new preEIRConvert hook, run in compile() before collectEIRFunctions on both pipelines). It now skips super(...) calls — it runs before DesugarClasses — and stays in the legacy list as a post-classes cleanup run for the spreads that survive super rewriting. %arrayFromSpread lowers to the new array_from_spread op (scratch-spilled call to _ejs_array_from_iterables). Two latent legacy bugs fixed on the way: - node-visitor didn't dispatch ImportDefaultSpecifier / ImportNamespaceSpecifier, so any generic traversal of a not-yet-desugared import panicked (nothing traversed one before). - DesugarSpread's %arrayFromSpread "flattening" discarded its Array.concat result, silently dropping arguments in calls like f(...a, [1, ...b]). The special case was wrong anyway (a nested spread array is a single value argument); it's gone. Self-hosted --ir: 421/424 lowered, 0 late failures. The 4 spread fallbacks are gone; the 3 survivors are per-iteration loop envs. Validated: test-eir (3 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, test/eir-spread1.js. Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 32 ++++++++++++++++++++++----- lib/compiler.js | 6 ++++- lib/eir/emit.js | 17 +++++++++++++- lib/eir/intrinsics.js | 25 +++++++++++++++++++++ lib/eir/lower.js | 37 ++++++++++++++++++++++--------- lib/eir/ops.js | 4 ++++ lib/eir/scopes.js | 10 +++++++++ lib/eir/tests.js | 38 +++++++++++++++++++++++++++++++ lib/node-visitor.js | 14 ++++++++++++ lib/passes/desugar-spread.js | 16 +++++++++----- test/eir-spread1.js | 43 ++++++++++++++++++++++++++++++++++++ 11 files changed, 219 insertions(+), 23 deletions(-) create mode 100644 lib/eir/intrinsics.js create mode 100644 test/eir-spread1.js diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index aac431e3..819ab9a8 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -33,6 +33,18 @@ import * as debug from "./debug"; // const enable_hoist_func_decls_pass = true; +// pipeline-agnostic AST->AST rewrites that run BEFORE collectEIRFunctions +// (phase 2 of the legacy-removal plan): constructs EIR has no native +// lowering for arrive there as %-intrinsic calls, which lower through +// lib/eir/intrinsics.js. the legacy pipeline consumes the same output +// (its own %-intrinsic handling predates EIR), so both pipelines see one +// AST. +// +// DesugarSpread also stays in the main list below: it skips super calls +// (this runs before DesugarClasses now), so the post-classes run picks up +// spreads remaining in rewritten super calls. +const pre_eir_passes = [DesugarSpread]; + const passes = [ DesugarImportExport, DesugarClasses, @@ -62,11 +74,8 @@ const passes = [ LambdaLift, ]; -export function convert(tree, filename, modules, options) { - debug.log("before:"); - debug.log(() => escodegen.generate(tree)); - - passes.forEach((passType) => { +function runPasses(passList, tree, filename, modules, options) { + passList.forEach((passType) => { if (!passType) return; try { debug.time(2, passType.name); @@ -93,3 +102,16 @@ export function convert(tree, filename, modules, options) { return tree; } + +// runs in compile() before collectEIRFunctions, on both the --ir and +// legacy paths +export function preEIRConvert(tree, filename, modules, options) { + return runPasses(pre_eir_passes, tree, filename, modules, options); +} + +export function convert(tree, filename, modules, options) { + debug.log("before:"); + debug.log(() => escodegen.generate(tree)); + + return runPasses(passes, tree, filename, modules, options); +} diff --git a/lib/compiler.js b/lib/compiler.js index 5e738c81..e7914bbf 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -8,7 +8,7 @@ import { Stack } from "./stack-es6"; import { TreeVisitor } from "./node-visitor"; import { generate as escodegenerate } from "../external-deps/escodegen/escodegen-es6"; -import { convert as closure_convert } from "./closure-conversion"; +import { convert as closure_convert, preEIRConvert as pre_eir_convert } from "./closure-conversion"; import * as optimizations from "./optimizations"; import * as types from "./types"; import * as consts from "./consts"; @@ -3576,6 +3576,10 @@ export function compile(tree, base_output_filename, source_filename, module_info tree = insert_toplevel_func(tree, this_module_info); + // pipeline-agnostic desugars run before EIR collection so both + // pipelines see their %-intrinsic output + tree = pre_eir_convert(tree, module_filename, module_infos, options); + if (options.ir) { let excluded = options.ir_exclude && diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 6c5349f3..138dfae1 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -273,7 +273,8 @@ export class EIREmitter { eirFn.forEachInst((inst) => { if (inst.op === "call") max = Math.max(max, inst.operands.length - 2); else if (inst.op === "construct") max = Math.max(max, inst.operands.length - 1); - else if (inst.op === "make_array") max = Math.max(max, inst.operands.length); + else if (inst.op === "make_array" || inst.op === "array_from_spread") + max = Math.max(max, inst.operands.length); }); return max; } @@ -606,6 +607,20 @@ export class EIREmitter { "arr" ); } + case "array_from_spread": { + // concatenate the operands (array chunks / iterables) into + // a fresh array, like the legacy handleArrayFromSpread + let elems = inst.operands.map((o) => this.val(o)); + let argv; + if (elems.length > 0) argv = this.spillArgs(elems); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + rt.array_from_iterables, + [consts.int32(elems.length), argv], + "spreadarr" + ); + } case "make_object": { let proto = ir.createLoad( types.EjsValue, diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js new file mode 100644 index 00000000..52054b0d --- /dev/null +++ b/lib/eir/intrinsics.js @@ -0,0 +1,25 @@ +/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- + * vim: set ts=4 sw=4 et tw=99 ft=js: + */ + +// The %-intrinsic calls EIR knows how to lower, keyed by callee name. +// Pre-EIR desugar passes (see preEIRConvert in closure-conversion.js) +// rewrite constructs lowering has no native form for into calls of these +// intrinsics, which both pipelines then understand: the legacy visitor +// through its ejs_intrinsics table, EIR through this one. +// +// An entry is either +// { op: "" } lower to that op, operands = the +// visited arguments +// { runtime: "" } lower to call_runtime imms.name (the +// runtime function must take plain ejsval +// arguments and return an ejsval) +// +// scopes.js consults this table to reject unknown intrinsics EARLY (a +// late LowerNotSupported abandons the whole file's EIR set), so keep it +// the single source of truth: never lower an intrinsic in lower.js that +// isn't listed here. + +export const eir_intrinsics = { + "%arrayFromSpread": { op: "array_from_spread" }, +}; diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 0b9f2b14..efff7552 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -16,24 +16,27 @@ // Calling convention mirrors the runtime: every function takes // (%env, %this, ...params). // -// Handled: literals, identifiers (locals/captured/globals), var/let/const, -// assignment (= and compound), update (++/--), binary/logical/unary -// operators, member access, calls, new, this, sequence/array/object -// literals, untagged template literals, function declarations and -// expressions, arrow functions that don't use `this` (full closure -// support), default parameters, if/else, while, do-while, for, for-of, -// switch, break/continue, return, throw, try/catch (unwind edges). +// Handled: literals (incl. regex), identifiers (locals/captured/globals), +// var/let/const, assignment (= and compound), update (++/--), +// binary/logical/unary operators, member access, calls, new, this, +// sequence/array/object literals, untagged template literals, function +// declarations and expressions, arrow functions that don't use `this` +// (full closure support), default/rest parameters, `arguments`, if/else, +// while, do-while, for, for-of, for-in, switch, break/continue, return, +// throw, try/catch (unwind edges), try/finally (finalizer duplication), +// and the %-intrinsic calls listed in intrinsics.js (produced by the +// pre-EIR desugar passes, e.g. %arrayFromSpread). // -// Not yet: for-in, `arguments`, rest params, tagged templates, regex -// literals, arrows using lexical `this`, closures over let/const loop -// variables (per-iteration envs), try/finally (desugar it first), -// labeled break/continue, getters/setters. +// Not yet: tagged templates, arrows using lexical `this`, closures over +// let/const loop variables (per-iteration envs), labeled break/continue, +// getters/setters. import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; import { Module } from "./ir"; import { ScopeAnalysis, compound_assign_ops } from "./scopes"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; +import { eir_intrinsics } from "./intrinsics"; const binops = { "+": "add", @@ -550,6 +553,10 @@ class LowerFunction { } call(n) { + // %-intrinsic calls from the pre-EIR desugar passes lower through + // the table in intrinsics.js (scopes.js already rejected unknowns) + if (n.callee.type === b.Identifier && n.callee.name[0] === "%") + return this.intrinsicCall(n); let callee, thisArg; if (n.callee.type === b.MemberExpression) { // ns.member(...) on a JS namespace import: the callee resolves @@ -604,6 +611,14 @@ class LowerFunction { return this.b.emit("call", [callee, thisArg].concat(args), {}); } + intrinsicCall(n) { + let intr = eir_intrinsics[n.callee.name]; + if (!intr) throw LowerNotSupported(`intrinsic ${n.callee.name}`, n.loc); + let args = n.arguments.map((a) => this.expr(a)); + if (intr.op) return this.b.emit(intr.op, args, {}); + return this.b.emit("call_runtime", args, { name: intr.runtime }); + } + newExpr(n) { let callee = this.expr(n.callee); let args = n.arguments.map((a) => this.expr(a)); diff --git a/lib/eir/ops.js b/lib/eir/ops.js index 340c9a04..a9e11d8b 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -101,6 +101,10 @@ export const OPS = { // --- allocation ------------------------------------------------------------ make_array: { arity: -1, effects: E.GC | E.WRITE }, + // %arrayFromSpread: concatenate the operands (each an array literal + // chunk or an arbitrary iterable) into one fresh array. iterating can + // reenter user JS, hence GENERIC_OP. + array_from_spread: { arity: -1, effects: GENERIC_OP }, // imms.keys: array of atom names, one per operand make_object: { arity: -1, effects: E.GC | E.WRITE, imms: ["keys"] }, // a fresh RegExp per evaluation (ES6 semantics, matching the legacy diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index dafd7a0a..174ad6ec 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -20,6 +20,7 @@ import * as b from "../ast-builder"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; +import { eir_intrinsics } from "./intrinsics"; // compound assignment operator -> the binary operator it desugars to // (kept in sync with lower.js's binops table) @@ -529,6 +530,15 @@ export class ScopeAnalysis { for (let e of n.expressions) this.walkExpr(e); return; case b.CallExpression: + // %-intrinsic calls (from the pre-EIR desugar passes): + // the callee is a lowering directive, not a reference. + // only whitelisted intrinsics lower; reject others early. + if (n.callee.type === b.Identifier && n.callee.name[0] === "%") { + if (!eir_intrinsics[n.callee.name]) + throw LowerNotSupported(`intrinsic ${n.callee.name}`, n.loc); + for (let a of n.arguments) this.walkExpr(a); + return; + } if (n.callee.type === b.Identifier) this.reference(n.callee, true); else this.walkExpr(n.callee); for (let a of n.arguments) this.walkExpr(a); diff --git a/lib/eir/tests.js b/lib/eir/tests.js index c4d22b1f..dcd7cbd4 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -13,6 +13,7 @@ import { verifyFunction, verifyModule } from "./verifier"; import { lowerFunctionNode, lowerProgram } from "./lower"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst } from "./ir"; +import { DesugarSpread } from "../passes/desugar-spread"; import * as esprima from "../../external-deps/esprima/esprima-es6"; let failures = 0; @@ -314,6 +315,43 @@ test("lower: unsupported constructs raise LowerNotSupported", () => { assert(threw, "expected LowerNotSupported"); }); +// --- lowering: %-intrinsics ------------------------------------------------ + +// parse + DesugarSpread, like the pre-EIR pipeline in compile() +function parseFnSpreadDesugared(src) { + let ast = esprima.parse(src, { loc: true, raw: true }); + ast = new DesugarSpread({ debug_passes: new Set() }).visit(ast); + for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; + throw new Error("no function declaration in source"); +} + +test("lower: spread call lowers via %arrayFromSpread -> array_from_spread", () => { + let r = lowerFunctionNode(parseFnSpreadDesugared("function f(a) { return g(1, 2, ...a); }")); + verifyModule(r.module); + let printed = printFunction(r.fn); + assertContains(printed, "array_from_spread"); + assert(printed.indexOf('get_global atom="%') === -1, "intrinsic leaked as a global load"); +}); + +test("lower: array literal spread lowers to array_from_spread", () => { + let r = lowerFunctionNode(parseFnSpreadDesugared("function f(a, b) { return [0, ...a, ...b]; }")); + verifyModule(r.module); + assertContains(printFunction(r.fn), "array_from_spread"); +}); + +test("lower: unknown %-intrinsics raise LowerNotSupported", () => { + let fnNode = parseFnSpreadDesugared("function t(a) { return dummy(a); }"); + // synthesize a call to an intrinsic lowering doesn't know + fnNode.body.body[0].argument.callee.name = "%noSuchIntrinsic"; + let threw = false; + try { + lowerFunctionNode(fnNode); + } catch (e) { + threw = isLowerNotSupported(e); + } + assert(threw, "expected LowerNotSupported"); +}); + test("lower: program with several functions", () => { let ast = esprima.parse( "function one() { return 1; } function two() { return one() + 1; }", diff --git a/lib/node-visitor.js b/lib/node-visitor.js index 9197a675..9a13b75d 100644 --- a/lib/node-visitor.js +++ b/lib/node-visitor.js @@ -139,6 +139,12 @@ export class TreeVisitor { case b.ImportSpecifier: rv = this.visitImportSpecifier(n, ...args); break; + case b.ImportDefaultSpecifier: + rv = this.visitImportDefaultSpecifier(n, ...args); + break; + case b.ImportNamespaceSpecifier: + rv = this.visitImportNamespaceSpecifier(n, ...args); + break; case b.LabeledStatement: rv = this.visitLabeledStatement(n, ...args); break; @@ -550,6 +556,14 @@ export class TreeVisitor { return n; } + visitImportDefaultSpecifier(n) { + return n; + } + + visitImportNamespaceSpecifier(n) { + return n; + } + visitArrayPattern(n, ...args) { n.elements = this.visitArrayKeep(n.elements, ...args); return n; diff --git a/lib/passes/desugar-spread.js b/lib/passes/desugar-spread.js index bde31be9..62251594 100644 --- a/lib/passes/desugar-spread.js +++ b/lib/passes/desugar-spread.js @@ -18,7 +18,7 @@ import { TransformPass } from "../node-visitor"; import * as b from "../ast-builder"; -import { intrinsic, is_intrinsic } from "../echo-util"; +import { intrinsic } from "../echo-util"; import { arrayFromSpread_id, apply_id } from "../common-ids"; export class DesugarSpread extends TransformPass { @@ -73,6 +73,15 @@ export class DesugarSpread extends TransformPass { visitCallExpression(n) { n = super.visitCallExpression(n); + + // super(...args) / super.foo(...args) can't be rewritten to an + // .apply call. this pass now runs before DesugarClasses (pre-EIR); + // leave super calls alone — DesugarClasses rewrites them into + // ordinary calls, and the post-classes run of this pass desugars + // whatever spreads remain. + if (n.callee.type === b.Super) return n; + if (n.callee.type === b.MemberExpression && n.callee.object.type === b.Super) return n; + let needs_desugaring = false; for (let el of n.arguments) { if (el.type === b.SpreadElement) { @@ -86,10 +95,7 @@ export class DesugarSpread extends TransformPass { let new_args = []; let current_elements = []; for (let el of n.arguments) { - if (is_intrinsic(el, "%arrayFromSpread")) { - // flatten spreads - new_args.concat(el.arguments); - } else if (el.type === b.SpreadElement) { + if (el.type === b.SpreadElement) { if (current_elements.length === 0) { // just push the spread argument into the new args new_args.push(el.argument); diff --git a/test/eir-spread1.js b/test/eir-spread1.js new file mode 100644 index 00000000..daa6bfb6 --- /dev/null +++ b/test/eir-spread1.js @@ -0,0 +1,43 @@ +// spread calls and spread array literals through the EIR pipeline +// (DesugarSpread runs pre-EIR; %arrayFromSpread lowers to +// array_from_spread) + +function join3(a, b, c) { + return a + "," + b + "," + c; +} + +function callSpread(xs) { + return join3(1, ...xs); +} + +function arraySpread(xs, ys) { + return [0, ...xs, 9, ...ys]; +} + +function methodSpread(xs) { + let o = { + base: "b", + m: function (x, y) { + return this.base + ":" + x + ":" + y; + }, + }; + return o.m(...xs); +} + +// a non-spread array-literal-with-spread argument next to a spread arg: +// the argument used to be silently dropped by DesugarSpread's bogus +// %arrayFromSpread flattening +function mixedArgs(xs, ys) { + return join3(...xs, [1, ...ys].join("+")); +} + +function nestedSpread(xs) { + return [...[...xs, 5], 6]; +} + +console.log(callSpread([2, 3])); +console.log(arraySpread([1, 2], [3]).join(" ")); +console.log(methodSpread(["x", "y"])); +console.log(mixedArgs([7, 8], [2, 3])); +console.log(nestedSpread([4]).join("")); +console.log(join3(...["t"], ...[], ...["u", "v"])); From 3bdbb49098204fa56a9a9a907172e71151924c86 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 18:46:46 -0700 Subject: [PATCH 031/146] eir: per-iteration loop environments; fix legacy for-in let capture MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Captured let/const loop variables get a fresh environment per iteration (ES6 semantics), natively in EIR — no DesugarLetLoopVars try/finally wrapping. Scope analysis creates a LoopEnv candidate per let/const loop declaration and materializes it once capture flags are known: captured bindings get loop-env slots (slot 0 holds the enclosing env), everything else stays SSA. Lowering allocates the env at loop entry, refreshes it per iteration (for-update blocks copy the loop vars forward into a fresh env; for-of/for-in just make a fresh one at body top), and tracks the current env value as a builder variable so it flows through block params like any other SSA value (envs are ejsvals). envForBinding generalizes from one-env-per-function to a walk over a descriptor chain (loop envs -> function env -> the descriptor at the function's definition site); each function records the loop env active at its definition so closures created inside a loop start their chain at that iteration's env. The for-of/for-in initial env exists before the RHS evaluates: analysis declares the binding before walking the RHS, so a closure there may already capture it (reading undefined; echojs has no TDZ). Legacy bug #11, caught by the new suite test on the legacy stages: DesugarLetLoopVars only handled plain `for` — `for (let/const k in o)` closures all shared one binding and saw the last key. Now desugars to `for (var %loop_k in o) { let k = %loop_k; body }` (no copy-back needed: for-in rebinds every iteration). for-of was already covered via the DesugarForOf rewrite. Self-hosted --ir: 424/424 lowered, 0 fallbacks — phase 1 gap closure is complete. Validated: test-eir (5 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, test/eir-loopenv1.js (both pipelines, output identical to node). Co-Authored-By: Claude Fable 5 --- lib/eir/lower.js | 168 +++++++++++++++++++++++++---- lib/eir/scopes.js | 134 +++++++++++++++++++---- lib/eir/tests.js | 66 ++++++++++++ lib/passes/desugar-let-loopvars.js | 33 ++++++ test/eir-loopenv1.js | 53 +++++++++ 5 files changed, 412 insertions(+), 42 deletions(-) create mode 100644 test/eir-loopenv1.js diff --git a/lib/eir/lower.js b/lib/eir/lower.js index efff7552..2ab8cf51 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -82,6 +82,12 @@ class LowerFunction { // switch to the enclosing loop). this.breakTargets = []; this.continueTargets = []; + // materialized per-iteration loop envs lexically active at the + // current lowering position (innermost last). the current env + // value of each is tracked as a builder variable ("%loopenv#id"), + // so per-iteration refreshes flow through SSA/block params like + // any other variable (envs are ejsvals). + this.activeLoopEnvs = []; // active try/finally contexts. abrupt exits (return, break, // continue) crossing a finally boundary lower a fresh copy of each // crossed finalizer at the exit site (finalizer duplication). @@ -108,8 +114,11 @@ class LowerFunction { // from function entry, even before its declaration statement runs // (`use(x); ... if (c) { var x = 5; }`). the declaration-time // write in VariableDeclaration still handles the per-iteration - // reset of block-scoped lets in loops. + // reset of block-scoped lets in loops. loop-env bindings are + // skipped: their env doesn't exist yet (it's created at loop + // entry), and being let/const they're only visible inside the loop. for (let binding of info.bindings) { + if (binding.loopEnv && binding.loopEnv.materialized) continue; if (binding.kind === "local") this.writeBinding(binding, this.b.constUndefined()); } @@ -170,27 +179,79 @@ class LowerFunction { // --- binding access ----------------------------------------------------------- - // the environment holding `binding`, from this function's point of view - envForBinding(binding) { - if (binding.fnInfo === this.info) return this.curEnv; - // start from our incoming env (the environment current in our parent - // when our closure was made) and follow parent slots upward - let env = this.envParam; - let a = this.nearestEnvAncestor(this.info); - while (a && a !== binding.fnInfo) { - if (a.parentSlot < 0) - throw new Error(`EIR lowering: broken env chain through ${a.name}`); - env = this.b.emit("env_load", [env], { slot: a.parentSlot }); - a = this.nearestEnvAncestor(a); + // Environments form a chain of descriptors: per-iteration loop envs + // (LoopEnv, parent in slot 0) inside their function's env (FnInfo, + // parent in parentSlot), which chains to the descriptor current at + // the function's definition site. envForBinding walks that chain + // from the current lowering position to the descriptor holding the + // binding, emitting one env_load per hop. + + levar(le) { + return `%loopenv#${le.id}`; + } + + // the env value make_closure should capture at the current position + curEnvValue() { + if (this.activeLoopEnvs.length > 0) { + let le = this.activeLoopEnvs[this.activeLoopEnvs.length - 1]; + return this.b.readVariable(this.levar(le), this.b.cur); } - if (!a) throw new Error(`EIR lowering: env chain missed ${binding.uid}`); - return env; + return this.curEnv; } - nearestEnvAncestor(f) { + // the innermost materialized descriptor at f's definition site + descAtCreation(f) { + let le = f.creationLoopEnv; + while (le && !le.materialized) le = le.parentCandidate; + if (le) return le; let p = f.parent; - while (p && p.envSize === 0) p = p.parent; - return p; + if (!p) return null; + if (p.envSize > 0) return p; + return this.descAtCreation(p); + } + + // the descriptor whose env value lives in desc's parent slot + parentDescOf(desc) { + if (desc.isLoopEnv) { + // slot 0 holds curEnv at loop entry: the nearest enclosing + // materialized loop env, else the function env, else the + // function's creation-site descriptor (== its incoming env) + let le = desc.parentCandidate; + while (le && !le.materialized) le = le.parentCandidate; + if (le) return le; + if (desc.fnInfo.envSize > 0) return desc.fnInfo; + return this.descAtCreation(desc.fnInfo); + } + // a function env's parent slot holds its incoming env + return this.descAtCreation(desc); + } + + // the environment holding `binding`, from the current position + envForBinding(binding) { + let target = + binding.loopEnv && binding.loopEnv.materialized ? binding.loopEnv : binding.fnInfo; + + let desc, env; + if (this.activeLoopEnvs.length > 0) { + desc = this.activeLoopEnvs[this.activeLoopEnvs.length - 1]; + env = this.b.readVariable(this.levar(desc), this.b.cur); + } else if (this.info.envSize > 0) { + desc = this.info; + env = this.curEnv; + } else { + desc = this.descAtCreation(this.info); + env = this.envParam; + } + + while (desc && desc !== target) { + let slot = desc.isLoopEnv ? 0 : desc.parentSlot; + if (slot < 0) + throw new Error(`EIR lowering: broken env chain through ${desc.name}`); + env = this.b.emit("env_load", [env], { slot: slot }); + desc = this.parentDescOf(desc); + } + if (!desc) throw new Error(`EIR lowering: env chain missed ${binding.uid}`); + return env; } readBinding(binding) { @@ -326,7 +387,9 @@ class LowerFunction { let childInfo = this.analysis.infoFor(n); if (!childInfo) throw new Error("EIR lowering: unanalyzed function expression"); lowerOneFunction(childInfo, this.analysis, this.module, this.mod_ctx); - return this.b.emit("make_closure", [this.curEnv], { fn: childInfo.name }); + // capture the innermost env: the current iteration's loop env when + // inside a for-let loop, else the function env / incoming env + return this.b.emit("make_closure", [this.curEnvValue()], { fn: childInfo.name }); } binary(n) { @@ -820,6 +883,21 @@ class LowerFunction { } forStmt(n) { + // captured let/const loop vars live in a fresh env per iteration: + // the initial env is created before the init declaration runs, and + // each pass through the update block makes a new env, copying the + // loop vars forward (so the update and next test see the copies, + // and closures made in earlier iterations keep their own) + let le = this.analysis.loopEnvOf(n); + let outerEnvVal = null; + if (le) { + outerEnvVal = this.curEnvValue(); + let e = this.b.emit("make_env", [], { size: le.envSize }); + this.b.emit("env_store", [e, outerEnvVal], { slot: 0 }); + this.b.writeVariable(this.levar(le), this.b.cur, e); + this.activeLoopEnvs.push(le); + } + if (n.init) { if (n.init.type === b.VariableDeclaration) this.stmt(n.init); else this.expr(n.init); @@ -852,10 +930,21 @@ class LowerFunction { this.b.sealBlock(update); this.b.setInsertPoint(update); + if (le) { + let eold = this.b.readVariable(this.levar(le), this.b.cur); + let enew = this.b.emit("make_env", [], { size: le.envSize }); + this.b.emit("env_store", [enew, outerEnvVal], { slot: 0 }); + for (let bd of le.bindings) { + let v = this.b.emit("env_load", [eold], { slot: bd.slot }); + this.b.emit("env_store", [enew, v], { slot: bd.slot }); + } + this.b.writeVariable(this.levar(le), this.b.cur, enew); + } if (n.update) this.expr(n.update); this.b.br(header, []); this.b.sealBlock(header); this.b.sealBlock(exit); + if (le) this.activeLoopEnvs.pop(); this.b.setInsertPoint(exit); } @@ -893,6 +982,23 @@ class LowerFunction { // mirrors the legacy DesugarForOf expansion: iterable[Symbol.iterator]() // once, then `next()` per iteration, testing `.done` and binding `.value` forOfStmt(n) { + // a captured let/const loop var gets a fresh env each iteration + // (created at the top of the body, right before the var is bound); + // no copying between iterations — the binding is (re)assigned from + // the iteration value anyway. an initial env exists before the + // RHS evaluates: scope analysis declares the binding before + // walking the RHS, so a closure there may already capture it + // (reading undefined, matching the legacy alloca behavior). + let le = this.analysis.loopEnvOf(n); + let outerEnvVal = null; + if (le) { + outerEnvVal = this.curEnvValue(); + let e0 = this.b.emit("make_env", [], { size: le.envSize }); + this.b.emit("env_store", [e0, outerEnvVal], { slot: 0 }); + this.b.writeVariable(this.levar(le), this.b.cur, e0); + this.activeLoopEnvs.push(le); + } + let obj = this.expr(n.right); let sym = this.b.emit("get_global", [], { atom: "Symbol" }); let itkey = this.b.emit("get_prop_atom", [sym], { atom: "iterator" }); @@ -914,6 +1020,11 @@ class LowerFunction { this.b.sealBlock(body); this.b.setInsertPoint(body); + if (le) { + let e = this.b.emit("make_env", [], { size: le.envSize }); + this.b.emit("env_store", [e, outerEnvVal], { slot: 0 }); + this.b.writeVariable(this.levar(le), this.b.cur, e); + } let v = this.b.emit("get_prop_atom", [res], { atom: "value" }); if (n.left.type === b.VariableDeclaration) { let binding = this.analysis.resolve(n.left.declarations[0].id); @@ -930,6 +1041,7 @@ class LowerFunction { this.b.sealBlock(header); this.b.sealBlock(exit); + if (le) this.activeLoopEnvs.pop(); this.b.setInsertPoint(exit); } @@ -938,6 +1050,18 @@ class LowerFunction { // iterator value is opaque (not an ejsval) and must stay a direct // instruction reference — never a block argument. forInStmt(n) { + // fresh env per iteration for a captured let/const binding, with + // an initial env before the RHS evaluates — as in forOfStmt + let le = this.analysis.loopEnvOf(n); + let outerEnvVal = null; + if (le) { + outerEnvVal = this.curEnvValue(); + let e0 = this.b.emit("make_env", [], { size: le.envSize }); + this.b.emit("env_store", [e0, outerEnvVal], { slot: 0 }); + this.b.writeVariable(this.levar(le), this.b.cur, e0); + this.activeLoopEnvs.push(le); + } + let obj = this.expr(n.right); let iter = this.b.emit("prop_iter_new", [obj], {}); @@ -953,6 +1077,11 @@ class LowerFunction { this.b.sealBlock(body); this.b.setInsertPoint(body); + if (le) { + let e = this.b.emit("make_env", [], { size: le.envSize }); + this.b.emit("env_store", [e, outerEnvVal], { slot: 0 }); + this.b.writeVariable(this.levar(le), this.b.cur, e); + } let v = this.b.emit("prop_iter_current", [iter], {}); if (n.left.type === b.VariableDeclaration) { let binding = this.analysis.resolve(n.left.declarations[0].id); @@ -969,6 +1098,7 @@ class LowerFunction { this.b.sealBlock(header); this.b.sealBlock(exit); + if (le) this.activeLoopEnvs.pop(); this.b.setInsertPoint(exit); } diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 174ad6ec..5457cdcb 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -48,6 +48,7 @@ export class Binding { this.fnInfo = fnInfo; // declaring FnInfo this.captured = false; this.slot = -1; // env slot, if captured + this.loopEnv = null; // LoopEnv candidate, for let/const loop bindings } } @@ -62,10 +63,35 @@ export class FnInfo { this.needsParentEnv = false; // some descendant reaches past this fn this.envSize = 0; // slots (incl. parent slot), 0 = no env this.parentSlot = -1; // slot holding the parent env, or -1 + this.creationLoopEnv = null; // innermost LoopEnv at the definition site if (parent) parent.children.push(this); } } +// a per-iteration environment for a loop whose let/const bindings are +// captured by closures (`for (let i ...) { use(() => i); }`): each +// iteration allocates a fresh env so every closure sees that iteration's +// binding. slot 0 always holds the enclosing environment (the value of +// curEnv at loop entry). candidates are created for every let/const +// loop declaration during the walk and materialize after it, once +// capture flags are known; unmaterialized candidates are transparent. +let loopenv_id_gen = 0; + +export class LoopEnv { + constructor(fnInfo, node, parentCandidate) { + this.id = loopenv_id_gen++; + this.isLoopEnv = true; + this.fnInfo = fnInfo; // the function containing the loop + this.node = node; // the loop AST node + this.parentCandidate = parentCandidate; // enclosing LoopEnv in the same fn, or null + this.allBindings = []; // every let/const binding the loop declares + this.bindings = []; // the captured subset (set at materialization) + this.materialized = false; + this.envSize = 0; + this.parentSlot = -1; // always 0 once materialized + } +} + class LexScope { constructor(parent, fnInfo) { this.parent = parent; @@ -103,10 +129,22 @@ export class ScopeAnalysis { this.anon_gen = 0; this.curScope = null; this.curFn = null; - // let/const loop variables: capturing one in a closure needs a - // per-iteration environment, which lowering doesn't build; the - // post-walk check in analyzeFunction falls back instead. - this.loopLetBindings = []; + // per-iteration loop env candidates: every let/const loop + // declaration gets one; those with captured bindings materialize + // after the walk (see analyzeFunction) and lowering builds a + // fresh env per iteration. + this.loopEnvs = []; + this.loopEnvStack = []; // active candidates (innermost last) + this.loopEnvByNode = new Map(); // loop AST node -> LoopEnv + // set around a for-init declaration walk so the declared bindings + // attach to the loop's env candidate + this.pendingLoopEnv = null; + } + + // the loop's materialized env, or null (for lowering) + loopEnvOf(node) { + let le = this.loopEnvByNode.get(node); + return le && le.materialized ? le : null; } resolve(node) { @@ -149,12 +187,17 @@ export class ScopeAnalysis { else this.walkExpr(fnNode.body); // expression-bodied arrow this.leaveFunction(); if (selfBinding) this.curScope = this.curScope.parent; - for (let lb of this.loopLetBindings) { - if (lb.captured) - throw LowerNotSupported( - `closure capturing loop variable '${lb.name}' (needs per-iteration env)`, - fnNode.loc - ); + // materialize the loop envs whose bindings are captured; their + // bindings get loop-env slots (from 1; slot 0 is the parent env) + // and are excluded from function-env slot assignment below. + for (let le of this.loopEnvs) { + le.bindings = le.allBindings.filter((bd) => bd.captured); + if (le.bindings.length === 0) continue; + le.materialized = true; + le.parentSlot = 0; + let next = 1; + for (let bd of le.bindings) bd.slot = next++; + le.envSize = next; } assignSlots(info); return info; @@ -165,6 +208,12 @@ export class ScopeAnalysis { let info = new FnInfo(fnNode, fname, this.curFn); this.fnInfos.set(fnNode, info); + // the innermost loop env active at this definition site (in the + // DEFINING function): the closure's incoming env is that loop's + // per-iteration env, so env-chain walks must start there + let leTop = this.loopEnvStack[this.loopEnvStack.length - 1]; + info.creationLoopEnv = leTop && leTop.fnInfo === this.curFn ? leTop : null; + if (fnNode.generator) throw LowerNotSupported("generator function", fnNode.loc); @@ -212,6 +261,16 @@ export class ScopeAnalysis { this.curFn = this.curFn.parent; } + pushLoopEnv(node) { + let top = this.loopEnvStack[this.loopEnvStack.length - 1]; + let parentCandidate = top && top.fnInfo === this.curFn ? top : null; + let le = new LoopEnv(this.curFn, node, parentCandidate); + this.loopEnvs.push(le); + this.loopEnvByNode.set(node, le); + this.loopEnvStack.push(le); + return le; + } + reference(idNode, isCallee) { if (idNode.name === "undefined") { this.refs.set(idNode, null); @@ -286,10 +345,15 @@ export class ScopeAnalysis { this.curScope = this.curScope.parent; return; } - case b.VariableDeclaration: + case b.VariableDeclaration: { + // consume the for-init loop env candidate before descending + // into initializer expressions (a nested function's own + // declarations must not attach to it) + let ple = this.pendingLoopEnv; + this.pendingLoopEnv = null; for (let d of n.declarations) { if (d.id.type === b.ObjectPattern) { - this.declareObjectPattern(n, d); + this.declareObjectPattern(n, d, ple); continue; } if (d.id.type !== b.Identifier) @@ -309,9 +373,14 @@ export class ScopeAnalysis { } let binding = scope.declare(d.id.name, "local"); this.refs.set(d.id, binding); + if (ple) { + binding.loopEnv = ple; + ple.allBindings.push(binding); + } if (d.init) this.walkExpr(d.init); } return; + } case b.FunctionDeclaration: { if (!n.id) throw LowerNotSupported("unnamed function declaration", n.loc); if (!this.curScope.isFnTop) @@ -347,26 +416,31 @@ export class ScopeAnalysis { return; case b.ForStatement: { this.curScope = new LexScope(this.curScope, this.curFn); + let le = null; + if (n.init && n.init.type === b.VariableDeclaration && n.init.kind !== "var") { + le = this.pushLoopEnv(n); + } if (n.init) { if (n.init.type === b.VariableDeclaration) { + // the declared bindings attach to the loop env + // candidate (cleared by the declaration walk before + // it descends into initializer expressions) + this.pendingLoopEnv = le; this.walkStmt(n.init); - if (n.init.kind !== "var") { - for (let d of n.init.declarations) { - let binding = this.refs.get(d.id); - if (binding) this.loopLetBindings.push(binding); - } - } + this.pendingLoopEnv = null; } else this.walkExpr(n.init); } if (n.test) this.walkExpr(n.test); if (n.update) this.walkExpr(n.update); this.walkStmt(n.body); + if (le) this.loopEnvStack.pop(); this.curScope = this.curScope.parent; return; } case b.ForInStatement: case b.ForOfStatement: { this.curScope = new LexScope(this.curScope, this.curFn); + let le = null; if (n.left.type === b.VariableDeclaration) { if ( n.left.declarations.length !== 1 || @@ -381,7 +455,11 @@ export class ScopeAnalysis { } let binding = scope.declare(d.id.name, "local"); this.refs.set(d.id, binding); - if (n.left.kind !== "var") this.loopLetBindings.push(binding); + if (n.left.kind !== "var") { + le = this.pushLoopEnv(n); + binding.loopEnv = le; + le.allBindings.push(binding); + } } else if (n.left.type === b.Identifier) { let binding = this.reference(n.left); if (!binding) this.globalAssignedNames.add(n.left.name); @@ -390,6 +468,7 @@ export class ScopeAnalysis { } this.walkExpr(n.right); this.walkStmt(n.body); + if (le) this.loopEnvStack.pop(); this.curScope = this.curScope.parent; return; } @@ -450,8 +529,9 @@ export class ScopeAnalysis { } } - // `let { a, b: c, d = dflt } = init` — shallow object patterns only - declareObjectPattern(declStmt, d) { + // `let { a, b: c, d = dflt } = init` — shallow object patterns only. + // loopEnv is the enclosing for-init loop env candidate, if any. + declareObjectPattern(declStmt, d, loopEnv) { let scope = this.curScope; if (declStmt.kind === "var") { while (!scope.isFnTop) scope = scope.parent; @@ -474,6 +554,10 @@ export class ScopeAnalysis { ); let binding = scope.declare(target.name, "local"); this.refs.set(target, binding); + if (loopEnv) { + binding.loopEnv = loopEnv; + loopEnv.allBindings.push(binding); + } if (dflt) this.walkExpr(dflt); } if (d.init) this.walkExpr(d.init); @@ -600,8 +684,12 @@ export class ScopeAnalysis { function assignSlots(info) { let next = 0; // a parent pointer is only needed in the env if this function actually - // allocates one; if it doesn't, its incoming env already *is* the parent - let captured = info.bindings.filter((bd) => bd.captured); + // allocates one; if it doesn't, its incoming env already *is* the parent. + // captured bindings living in a per-iteration loop env got their slots + // there (analyzeFunction) and don't occupy function-env slots. + let captured = info.bindings.filter( + (bd) => bd.captured && !(bd.loopEnv && bd.loopEnv.materialized) + ); let wantsEnv = captured.length > 0; if (wantsEnv && info.needsParentEnv && info.parent !== null) { info.parentSlot = next++; diff --git a/lib/eir/tests.js b/lib/eir/tests.js index dcd7cbd4..56c3fdb4 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -315,6 +315,72 @@ test("lower: unsupported constructs raise LowerNotSupported", () => { assert(threw, "expected LowerNotSupported"); }); +// --- lowering: per-iteration loop envs --------------------------------------- + +test("lower: captured for-let var gets a per-iteration env", () => { + let { module, fn } = lowerOne( + "function f() { let fns = []; for (let i = 0; i < 3; i++) { fns.push(function () { return i; }); } return fns; }" + ); + let printed = printFunction(fn); + // an env is created at loop entry AND refreshed in the update block + let update = findBlock(fn, "for_update"); + assert( + update.insts.some((i) => i.op === "make_env"), + "update block should make a fresh env" + ); + // the header carries the current env as a block param + assert(findBlock(fn, "for_header").params.length === 1, "header should carry the env"); + // the closure reads the loop var from its incoming env + let child = findFn(module, "f.anon0"); + assertContains(printFunction(child), "env_load"); + verifyModule(module); +}); + +test("lower: uncaptured for-let vars stay SSA (no loop env)", () => { + let { fn } = lowerOne( + "function f(n) { let sum = 0; for (let i = 0; i < n; i++) { sum = sum + i; } return sum; }" + ); + assert( + !printFunction(fn).includes("make_env"), + "no env expected for uncaptured loop vars" + ); +}); + +test("lower: captured for-of var gets a fresh env per iteration", () => { + let { module, fn } = lowerOne( + "function f(xs) { let fns = []; for (let x of xs) { fns.push(function () { return x; }); } return fns; }" + ); + let body = findBlock(fn, "forof_body"); + assert( + body.insts.some((i) => i.op === "make_env"), + "body should make a fresh env each iteration" + ); + verifyModule(module); +}); + +test("lower: for-of RHS closure capturing the loop var sees the loop env", () => { + // scope analysis declares the binding before walking the RHS, so the + // closure's incoming env must be the loop env (holding undefined at + // that point — echojs has no TDZ), not the function env + let { module, fn } = lowerOne( + "function f(mk) { let fns = []; for (let x of mk(function () { return x; })) { fns.push(function () { return x; }); } return fns; }" + ); + // an initial env exists before the RHS call + let entry = fn.blocks[0]; + assert( + entry.insts.some((i) => i.op === "make_env"), + "entry should create the initial loop env before the RHS evaluates" + ); + verifyModule(module); +}); + +test("lower: nested captured loops chain their envs", () => { + let { module } = lowerOne( + "function f(base) { let fns = []; for (let i = 0; i < 2; i++) { for (let j = 0; j < 2; j++) { fns.push(function () { return base + i + j; }); } } return fns; }" + ); + verifyModule(module); // the env chain must verify (dominance + slots) +}); + // --- lowering: %-intrinsics ------------------------------------------------ // parse + DesugarSpread, like the pre-EIR pipeline in compile() diff --git a/lib/passes/desugar-let-loopvars.js b/lib/passes/desugar-let-loopvars.js index 4226398e..c3c65e25 100644 --- a/lib/passes/desugar-let-loopvars.js +++ b/lib/passes/desugar-let-loopvars.js @@ -82,6 +82,39 @@ export class DesugarLetLoopVars extends TransformPass { return n; } + + // for (let k in o) body → for (var %loop_k in o) { let k = %loop_k; body } + // + // unlike visitFor there's no copy-back through a finally: for-in + // creates a fresh binding each iteration (nothing carries over), so a + // fresh `let` initialized from the hoisted var is the whole story. + // without this, closures created in the body all shared one binding + // and saw the last key. + visitForIn(n) { + n.right = this.visit(n.right); + if ( + n.left.type !== b.VariableDeclaration || + n.left.kind === "var" || + n.left.declarations[0].id.type !== b.Identifier + ) { + n.body = this.visit(n.body); + return n; + } + + let kind = n.left.kind; // let or const + let decl = n.left.declarations[0]; + let orig = decl.id; + let loopvar = b.identifier(freshLoopVar(orig.name)); + decl.id = loopvar; + n.left.kind = "var"; + + let new_body = b.blockStatement(); + new_body.body.push(b.variableDeclaration(kind, orig, loopvar)); + new_body.body.push(n.body); + n.body = this.visit(new_body); + + return n; + } } class RemapIdentifiers extends TransformPass { diff --git a/test/eir-loopenv1.js b/test/eir-loopenv1.js new file mode 100644 index 00000000..99907043 --- /dev/null +++ b/test/eir-loopenv1.js @@ -0,0 +1,53 @@ +// per-iteration environments: closures capturing let/const loop variables +// see their own iteration's binding (EIR loop envs; no DesugarLetLoopVars) + +function forCapture() { + let fns = []; + for (let i = 0; i < 3; i++) fns.push(function () { return i; }); + return fns.map(function (g) { return g(); }).join(","); +} +function forOfCapture(xs) { + let fns = []; + for (let x of xs) fns.push(function () { return x; }); + return fns.map(function (g) { return g(); }).join(","); +} +function forInCapture(o) { + let fns = []; + for (let k in o) fns.push(function () { return k; }); + return fns.map(function (g) { return g(); }).sort().join(","); +} +function mixedCapture(base) { + let fns = []; + for (let i = 0; i < 2; i++) { + for (let j = 0; j < 2; j++) fns.push(function () { return base + ":" + i + "" + j; }); + } + return fns.map(function (g) { return g(); }).join(" "); +} +function continueCapture(xs) { + let fns = []; + for (let i = 0; i < xs.length; i++) { + if (xs[i] < 0) continue; + fns.push(function () { return xs[i]; }); + } + return fns.map(function (g) { return g(); }).join(","); +} +function updateAfterCapture() { + let fns = []; + for (let i = 0; i < 3; i += 1) { + fns.push(function (d) { i = i + d; return i; }); + } + // each closure mutates its own iteration's binding + return fns.map(function (g) { return g(10); }).join(",") + "/" + fns.map(function (g) { return g(0); }).join(","); +} +function constForInCapture(o) { + let fns = []; + for (const k in o) fns.push(function () { return k; }); + return fns.map(function (g) { return g(); }).sort().join(","); +} +console.log(forCapture()); +console.log(forOfCapture(["a", "b", "c"])); +console.log(forInCapture({ p: 1, q: 2 })); +console.log(constForInCapture({ u: 1, v: 2 })); +console.log(mixedCapture("m")); +console.log(continueCapture([5, -1, 7])); +console.log(updateAfterCapture()); From e2e77208e7c80b3bf688f865a10eb034b66e3c47 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 19:21:49 -0700 Subject: [PATCH 032/146] =?UTF-8?q?eir:=20classes=20pre-EIR=20=E2=80=94=20?= =?UTF-8?q?construct=5Fsuper/new=5Ftarget=20ops,=20three=20class=20bug=20f?= =?UTF-8?q?ixes?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit DesugarClasses and DesugarMetaProperties join the pre-EIR pass list (classes before spread, the legacy relative order). `export class Foo` now reaches DesugarImportExport as `export let Foo = (...)` — the same %moduleSetSlot store — and classes inside EIR candidates lower natively. The class intrinsics land in intrinsics.js: %objectCreate / %setPrototypeOf / %setConstructorKind{Base,Derived} (call_runtime; new void handling — LLVM can't name void results, the EIR value reads as undefined), %constructSuper / %constructSuperApply / %getNewTarget (new ops). New ops: construct_super passes the function's incoming &this and newTarget to construct_closure (the runtime writes the constructed object back through &this — that's how a derived ctor's result reaches the outer construct), construct_super_apply likewise via construct_closure_apply, new_target reads calling-convention arg 4. `this` reads now go through the builder variable "%this" so super() rebinds it (SSA carries the update); everywhere else it collapses to the entry param. scopes.js rejects unresolved %-identifiers in value position (a legacy-intrinsic shape lowering doesn't model) instead of silently emitting a global load. Three more latent legacy bugs (#12-14): - DesugarClasses reused SINGLETON identifier nodes (common-ids superid, proto_id, and the class-name node n.id spanning the outer let and the iife body) across every class it desugared. Legacy resolves by name so it never noticed; EIR's node-keyed reference resolution aliased every occurrence to the last class walked. All value-position identifiers are now freshly minted per use. - super(...args) never compiled: DesugarSpread rewrote it to %constructSuper.apply(...), and %constructSuper isn't a value ("ReferenceError: undeclared identifier '%constructSuper'"). It now becomes %constructSuperApply(ref, %arrayFromSpread(...)), which both pipelines understand (all-array spreads flatten back to a plain %constructSuper). - a get/set accessor pair for the same property lost the getter: gather_members keyed properties by the key AST NODE, so the pair landed in two entries and the emitted `{ n: {get}, n: {set} }` object literal dropped the first. Non-computed accessors now key by name. Self-hosted --ir: 424/424, 0 fallbacks. Validated: test-eir (4 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, test/eir-class1.js (both pipelines, output identical to node). Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 15 +++--- lib/eir/emit.js | 51 ++++++++++++++++++- lib/eir/intrinsics.js | 16 ++++++ lib/eir/lower.js | 16 ++++-- lib/eir/ops.js | 10 ++++ lib/eir/scopes.js | 7 +++ lib/eir/tests.js | 59 ++++++++++++++++++++-- lib/passes/desugar-classes.js | 92 +++++++++++++++++++++++++---------- lib/passes/desugar-spread.js | 45 ++++++++++++++++- test/eir-class1.js | 61 +++++++++++++++++++++++ 10 files changed, 329 insertions(+), 43 deletions(-) create mode 100644 test/eir-class1.js diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index 819ab9a8..2bcd3a8b 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -40,14 +40,18 @@ const enable_hoist_func_decls_pass = true; // (its own %-intrinsic handling predates EIR), so both pipelines see one // AST. // -// DesugarSpread also stays in the main list below: it skips super calls -// (this runs before DesugarClasses now), so the post-classes run picks up -// spreads remaining in rewritten super calls. -const pre_eir_passes = [DesugarSpread]; +// DesugarClasses runs before DesugarSpread (the legacy relative order): +// super(...args) desugars into %constructSuper(ref, ...args) first, and +// the spread pass then rewrites what remains. running these before +// DesugarImportExport means `export class Foo` reaches it as +// `export let Foo = (...)` — the same %moduleSetSlot store. +// +// DesugarSpread also stays in the main list below as a safety net for +// spreads synthesized by later passes (currently none). +const pre_eir_passes = [DesugarClasses, DesugarSpread, DesugarMetaProperties]; const passes = [ DesugarImportExport, - DesugarClasses, DesugarRestParameters, DesugarDestructuring, DesugarUpdateAssignments, @@ -62,7 +66,6 @@ const passes = [ // has to run before DesugarDefaults, which assumes simple params. DesugarDestructuring, DesugarSpread, - DesugarMetaProperties, enable_hoist_func_decls_pass ? HoistFuncDecls : null, FuncDeclsToVars, DesugarLetLoopVars, diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 138dfae1..a3d86a5d 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -143,9 +143,12 @@ export class EIREmitter { let this_ptr = args[1]; let argc = args[2]; let args_ptr = args[3]; - // rest_args needs the raw calling-convention values + // rest_args / args_obj / construct_super / new_target need the raw + // calling-convention values this.fn_argc = argc; this.fn_args_ptr = args_ptr; + this.fn_this_ptr = this_ptr; + this.fn_new_target = args[4]; // scratch space for outgoing call arguments, and a slot for passing // &this to the runtime's calling convention @@ -272,7 +275,9 @@ export class EIREmitter { let max = 0; eirFn.forEachInst((inst) => { if (inst.op === "call") max = Math.max(max, inst.operands.length - 2); - else if (inst.op === "construct") max = Math.max(max, inst.operands.length - 1); + else if (inst.op === "construct" || inst.op === "construct_super") + max = Math.max(max, inst.operands.length - 1); + else if (inst.op === "construct_super_apply") max = Math.max(max, 1); else if (inst.op === "make_array" || inst.op === "array_from_spread") max = Math.max(max, inst.operands.length); }); @@ -594,6 +599,39 @@ export class EIREmitter { "ctorres" ); } + case "construct_super": { + // the super constructor writes the constructed object back + // through OUR incoming &this (that's how a derived ctor's + // result reaches the runtime's construct machinery), and + // newTarget passes through unchanged + let callee = this.val(inst.operands[0]); + let args = inst.operands.slice(1).map((o) => this.val(o)); + let argv; + if (args.length > 0) argv = this.spillArgs(args); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + rt.construct_closure, + [callee, this.fn_this_ptr, consts.int32(args.length), argv, this.fn_new_target], + "csuper" + ); + } + case "construct_super_apply": { + // operands = [super_ctor, args_array]; the runtime asserts + // argc == 1 and spreads the dense array itself + let callee = this.val(inst.operands[0]); + let argv = this.spillArgs([this.val(inst.operands[1])]); + return this.emitCallLike( + inst, + rt.construct_closure_apply, + [callee, this.fn_this_ptr, consts.int32(1), argv, this.fn_new_target], + "csuperapply" + ); + } + case "new_target": { + this.values.set(inst, this.fn_new_target); + return; + } case "make_array": { let elems = inst.operands.map((o) => this.val(o)); @@ -761,6 +799,15 @@ export class EIREmitter { if (!callee) throw new Error(`EIR emit: no runtime function '${inst.imms.name}'`); let argv = inst.operands.map((o) => this.val(o)); + if (inst.imms.void) { + // void results can't be named (LLVM) or read as values. + // materialize the placeholder BEFORE the call: an + // invoke (in a protected region) terminates the block. + let undef_val = this.undef(); + this.emitCallLike(inst, callee, argv, ""); + this.values.set(inst, undef_val); + return; + } return this.emitCallLike(inst, callee, argv, "rtres"); } diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js index 52054b0d..1bd34f53 100644 --- a/lib/eir/intrinsics.js +++ b/lib/eir/intrinsics.js @@ -20,6 +20,22 @@ // the single source of truth: never lower an intrinsic in lower.js that // isn't listed here. +// An entry may also set: +// void: true the runtime function returns void (the call is only +// valid as a statement; its EIR value reads as undefined) +// rebindThis: true the op's result becomes the function's `this` +// (super() in a derived constructor initializes it) export const eir_intrinsics = { "%arrayFromSpread": { op: "array_from_spread" }, + + // DesugarClasses + "%objectCreate": { runtime: "object_create" }, + "%setPrototypeOf": { runtime: "object_set_prototype_of" }, + "%setConstructorKindBase": { runtime: "set_constructor_kind_base", void: true }, + "%setConstructorKindDerived": { runtime: "set_constructor_kind_derived", void: true }, + "%constructSuper": { op: "construct_super", rebindThis: true }, + "%constructSuperApply": { op: "construct_super_apply", rebindThis: true }, + + // DesugarMetaProperties (new.target) + "%getNewTarget": { op: "new_target" }, }; diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 2ab8cf51..9fdc8cf7 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -76,6 +76,11 @@ class LowerFunction { this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); this.envParam = this.b.fn.entry.params[0]; this.thisParam = this.b.fn.entry.params[1]; + // `this` reads go through the builder variable "%this" (seeded to + // the entry param by the builder): a derived constructor's super() + // call rebinds it (the runtime constructs the object and returns + // it), and SSA carries the update. for every other function it + // collapses to the entry param. // break/continue targets. loops push onto both stacks; switch // statements only onto breakTargets (continue passes through a @@ -278,7 +283,7 @@ class LowerFunction { case b.Identifier: return this.identifier(n); case b.ThisExpression: - return this.thisParam; + return this.b.readVariable("%this", this.b.cur); case b.BinaryExpression: return this.binary(n); case b.LogicalExpression: @@ -678,8 +683,13 @@ class LowerFunction { let intr = eir_intrinsics[n.callee.name]; if (!intr) throw LowerNotSupported(`intrinsic ${n.callee.name}`, n.loc); let args = n.arguments.map((a) => this.expr(a)); - if (intr.op) return this.b.emit(intr.op, args, {}); - return this.b.emit("call_runtime", args, { name: intr.runtime }); + let v; + if (intr.op) v = this.b.emit(intr.op, args, {}); + else v = this.b.emit("call_runtime", args, { name: intr.runtime, void: intr.void }); + // super() in a derived constructor: the constructed object becomes + // `this` for the rest of the function + if (intr.rebindThis) this.b.writeVariable("%this", this.b.cur, v); + return v; } newExpr(n) { diff --git a/lib/eir/ops.js b/lib/eir/ops.js index a9e11d8b..f9b0cde3 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -98,6 +98,16 @@ export const OPS = { // call to a known EIR function): [env, this, ...args] call: { arity: -1, effects: GENERIC_OP, may_terminate: true, imms: ["direct"] }, construct: { arity: -1, effects: GENERIC_OP, may_terminate: true }, + // super(...) in a derived constructor: [super_ctor, ...args] (or + // [super_ctor, args_array] for the _apply form). calls the super + // constructor with this function's incoming &this and newTarget, + // writes the constructed object through &this, and returns it — + // lowering rebinds `this` to the result. + construct_super: { arity: -1, effects: GENERIC_OP, may_terminate: true }, + construct_super_apply: { arity: 2, effects: GENERIC_OP, may_terminate: true }, + // the calling convention's newTarget argument (undefined unless + // invoked via construct) + new_target: { arity: 0, effects: E.NONE }, // --- allocation ------------------------------------------------------------ make_array: { arity: -1, effects: E.GC | E.WRITE }, diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 5457cdcb..f947c1ae 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -302,6 +302,13 @@ export class ScopeAnalysis { let binding = this.curScope.lookup(idNode.name); this.refs.set(idNode, binding); // null = global if (!binding) { + // %-named identifiers are compiler-synthesized: ones that + // resolve to bindings (%super, pattern temps) are fine, but an + // unresolved one is a legacy-intrinsic shape lowering doesn't + // model (e.g. `%constructSuper.apply(...)` from a spread super + // call) — never a real global. fall back, don't miscompile. + if (idNode.name[0] === "%") + throw LowerNotSupported(`unresolved %-identifier ${idNode.name}`, idNode.loc); this.globalNames.add(idNode.name); if (!isCallee) this.globalValueNames.add(idNode.name); return null; diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 56c3fdb4..9f984629 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -14,6 +14,8 @@ import { lowerFunctionNode, lowerProgram } from "./lower"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; +import { DesugarClasses } from "../passes/desugar-classes"; +import { DesugarMetaProperties } from "../passes/desugar-metaproperties"; import * as esprima from "../../external-deps/esprima/esprima-es6"; let failures = 0; @@ -383,13 +385,17 @@ test("lower: nested captured loops chain their envs", () => { // --- lowering: %-intrinsics ------------------------------------------------ -// parse + DesugarSpread, like the pre-EIR pipeline in compile() -function parseFnSpreadDesugared(src) { +// parse + the pre-EIR desugar passes, like preEIRConvert in compile() +function parseFnPreEIR(src) { let ast = esprima.parse(src, { loc: true, raw: true }); - ast = new DesugarSpread({ debug_passes: new Set() }).visit(ast); + let opts = { debug_passes: new Set() }; + ast = new DesugarClasses(opts).visit(ast); + ast = new DesugarSpread(opts).visit(ast); + ast = new DesugarMetaProperties(opts).visit(ast); for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; throw new Error("no function declaration in source"); } +let parseFnSpreadDesugared = parseFnPreEIR; test("lower: spread call lowers via %arrayFromSpread -> array_from_spread", () => { let r = lowerFunctionNode(parseFnSpreadDesugared("function f(a) { return g(1, 2, ...a); }")); @@ -418,6 +424,53 @@ test("lower: unknown %-intrinsics raise LowerNotSupported", () => { assert(threw, "expected LowerNotSupported"); }); +test("lower: derived class ctor lowers construct_super and rebinds this", () => { + let r = lowerFunctionNode( + parseFnPreEIR( + "function f(v) { class A { constructor(x) { this.x = x; } } class B extends A { constructor() { super(1); this.v = v; } } return new B(); }" + ) + ); + verifyModule(r.module); + let ctor = null; + for (let fn of r.module.functions) if (/\.B$/.test(fn.name)) ctor = fn; + assert(ctor, "expected the B constructor in the module"); + let printed = printFunction(ctor); + assertContains(printed, "construct_super"); + // this.v = v must store into construct_super's result, not the entry + // this param (%1) + assert(!/set_prop_atom %1,/.test(printed), "post-super `this` should be the rebound value"); +}); + +test("lower: spread super call lowers to construct_super_apply", () => { + let r = lowerFunctionNode( + parseFnPreEIR( + "function f() { class A { constructor(a, b) { this.s = a + b; } } class B extends A { constructor(xs) { super(...xs); } } return new B([1, 2]); }" + ) + ); + verifyModule(r.module); + let all = r.module.functions.map((fn) => printFunction(fn)).join("\n"); + assertContains(all, "construct_super_apply"); +}); + +test("lower: new.target lowers to new_target", () => { + let r = lowerFunctionNode(parseFnPreEIR("function f() { return new.target; }")); + verifyModule(r.module); + assertContains(printFunction(r.fn), "new_target"); +}); + +test("lower: class accessors lower via make_object + defineProperties", () => { + let r = lowerFunctionNode( + parseFnPreEIR( + "function f() { class T { get n() { return 1; } set n(v) { this._x = v; } } return new T(); }" + ) + ); + verifyModule(r.module); + let all = r.module.functions.map((fn) => printFunction(fn)).join("\n"); + // one property entry carrying BOTH accessors (the get/set pair shares + // a make_object with keys get,set) + assertContains(all, 'keys=["get", "set"]'); +}); + test("lower: program with several functions", () => { let ast = esprima.parse( "function one() { return 1; } function two() { return one() + 1; }", diff --git a/lib/passes/desugar-classes.js b/lib/passes/desugar-classes.js index 4be658db..42a70ccb 100644 --- a/lib/passes/desugar-classes.js +++ b/lib/passes/desugar-classes.js @@ -46,10 +46,23 @@ import { intrinsic, startGenerator } from "../echo-util"; import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; +// identifiers that appear in VALUE position must be fresh AST nodes per +// use: the EIR scope analysis resolves references in a map keyed by node, +// so a shared singleton node (like common-ids' superid) walked in two +// class iifes would resolve every occurrence to the LAST iife's binding. +// property-position identifiers (`.prototype`, object keys) are never +// resolved and may stay shared. +function freshSuper() { + return b.identifier(superid.name); +} +function freshProto() { + return b.identifier(proto_id.name); +} + function createSuperReference(is_static, id) { - if (id && id.name === "constructor") return superid; + if (id && id.name === "constructor") return freshSuper(); - let obj = is_static ? superid : b.memberExpression(superid, prototype_id); + let obj = is_static ? freshSuper() : b.memberExpression(freshSuper(), prototype_id); if (!id) return obj; @@ -148,8 +161,13 @@ export class DesugarClasses extends TransformPass { let [properties, methods, sproperties, smethods] = this.gather_members(n); + // a fresh node per value-position use of the class name: n.id + // itself becomes the OUTER let declarator (visitClassDeclaration), + // and node-keyed reference resolution must not alias the two scopes + let cname = () => b.identifier(n.id.name); + class_init_iife_body.push( - b.letDeclaration(b.identifier("proto"), b.memberExpression(n.id, prototype_id)) + b.letDeclaration(b.identifier("proto"), b.memberExpression(cname(), prototype_id)) ); let ctor = null; @@ -186,9 +204,12 @@ export class DesugarClasses extends TransformPass { class_init_iife_body.unshift( b.expressionStatement( b.assignmentExpression( - b.memberExpression(b.memberExpression(n.id, prototype_id), constructor_id), + b.memberExpression( + b.memberExpression(cname(), prototype_id), + constructor_id + ), "=", - n.id + cname() ) ) ); @@ -197,9 +218,9 @@ export class DesugarClasses extends TransformPass { class_init_iife_body.unshift( b.expressionStatement( b.callExpression(setPrototypeOf_id, [ - b.memberExpression(ctor_func.id, prototype_id), + b.memberExpression(cname(), prototype_id), b.callExpression(objectCreate_id, [ - b.memberExpression(superid, prototype_id), + b.memberExpression(freshSuper(), prototype_id), ]), ]) ) @@ -207,28 +228,30 @@ export class DesugarClasses extends TransformPass { // 14.5.17 step 9, make sure the constructor's __proto__ is set to superClass class_init_iife_body.unshift( - b.expressionStatement(b.callExpression(setPrototypeOf_id, [ctor_func.id, superid])) + b.expressionStatement( + b.callExpression(setPrototypeOf_id, [cname(), freshSuper()]) + ) ); class_init_iife_body.unshift( - b.expressionStatement(intrinsic(setConstructorKindDerived_id, [ctor_func.id])) + b.expressionStatement(intrinsic(setConstructorKindDerived_id, [cname()])) ); } else { class_init_iife_body.unshift( - b.expressionStatement(intrinsic(setConstructorKindBase_id, [ctor_func.id])) + b.expressionStatement(intrinsic(setConstructorKindBase_id, [cname()])) ); } class_init_iife_body.unshift(ctor_func); // make sure we return the function from our iife - class_init_iife_body.push(b.returnStatement(n.id)); + class_init_iife_body.push(b.returnStatement(cname())); // (function (%super?) { ... }) let iife_body = b.blockStatement(class_init_iife_body, n.loc); return b.functionExpression( b.identifier(`${n.id.name || "anonclass"}_iife`), - n.superClass ? [superid] : [], + n.superClass ? [freshSuper()] : [], iife_body, [], null, @@ -267,10 +290,17 @@ export class DesugarClasses extends TransformPass { // a property let property_map = class_element.static ? sproperties : properties; - if (!property_map.has(class_element.key)) - property_map.set(class_element.key, new Map()); + // key non-computed accessors by NAME so a get/set pair for + // the same property shares one entry: keying by the key + // AST node put them in separate entries, and the emitted + // `{ n: {get}, n: {set} }` object literal lost the getter + let prop_key = class_element.computed + ? class_element.key + : class_element_name; - if (property_map.get(class_element.key).has(class_element.kind)) + if (!property_map.has(prop_key)) property_map.set(prop_key, new Map()); + + if (property_map.get(prop_key).has(class_element.kind)) reportError( SyntaxError, `a '${class_element.kind}' method for '${escodegen.generate( @@ -297,8 +327,8 @@ export class DesugarClasses extends TransformPass { // XXX this doesn't work for properties where one accessor is computed and the other isn't... let computed = class_element.computed; - if (property_map.get(class_element.key).has("computed")) { - if (computed != property_map.get(class_element.key).get("computed")) + if (property_map.get(prop_key).has("computed")) { + if (computed != property_map.get(prop_key).get("computed")) reportError( Error, "unsupported mismatch computed state for property accessors", @@ -307,9 +337,9 @@ export class DesugarClasses extends TransformPass { ); } - property_map.get(class_element.key).set(class_element.kind, class_element); + property_map.get(prop_key).set(class_element.kind, class_element); - property_map.get(class_element.key).set("computed", computed); + property_map.get(prop_key).set("computed", computed); } } @@ -317,8 +347,9 @@ export class DesugarClasses extends TransformPass { } create_constructor(ast_method, ast_class) { + // fresh id: ast_class.id is the outer let declarator's node return b.functionDeclaration( - ast_class.id, + b.identifier(ast_class.id.name), ast_method.value.params, ast_method.value.body, ast_method.value.defaults, @@ -331,7 +362,7 @@ export class DesugarClasses extends TransformPass { let args_id = b.identifier("args"); let functionBody = b.blockStatement( ast_class.superClass - ? [b.expressionStatement(intrinsic(constructSuperApply_id, [superid, args_id]))] + ? [b.expressionStatement(intrinsic(constructSuperApply_id, [freshSuper(), args_id]))] : [] ); return b.methodDefinition( @@ -361,7 +392,7 @@ export class DesugarClasses extends TransformPass { b.property(enumerable_id, b.literal(false)), ]); return b.expressionStatement( - b.callExpression(Object_defineProperty, [proto_id, method_key, defineProperty_args]) + b.callExpression(Object_defineProperty, [freshProto(), method_key, defineProperty_args]) ); } @@ -382,27 +413,34 @@ export class DesugarClasses extends TransformPass { b.property(enumerable_id, b.literal(false)), ]); return b.expressionStatement( - b.callExpression(Object_defineProperty, [ast_class.id, method_key, defineProperty_args]) + b.callExpression(Object_defineProperty, [ + b.identifier(ast_class.id.name), + method_key, + defineProperty_args, + ]) ); } create_properties(properties, ast_class, are_static) { let propdescs = []; - properties.forEach((prop_map, prop) => { + properties.forEach((prop_map) => { let accessors = []; let key = null; let getter = prop_map.get("get"); let setter = prop_map.get("set"); + // the map key is a name for non-computed accessors (so a + // get/set pair shares an entry); the emitted property key is + // the accessor's own key node if (getter) { accessors.push(b.property(get_id, getter.value)); - key = prop; + key = getter.key; } if (setter) { accessors.push(b.property(set_id, setter.value)); - key = prop; + key = setter.key; } propdescs.push( @@ -420,7 +458,7 @@ export class DesugarClasses extends TransformPass { let propdescs_literal = b.objectExpression(propdescs); let target; - if (are_static) target = ast_class.id; + if (are_static) target = b.identifier(ast_class.id.name); else target = b.identifier("proto"); return b.expressionStatement( diff --git a/lib/passes/desugar-spread.js b/lib/passes/desugar-spread.js index 62251594..d6a5017c 100644 --- a/lib/passes/desugar-spread.js +++ b/lib/passes/desugar-spread.js @@ -18,8 +18,28 @@ import { TransformPass } from "../node-visitor"; import * as b from "../ast-builder"; -import { intrinsic } from "../echo-util"; -import { arrayFromSpread_id, apply_id } from "../common-ids"; +import { intrinsic, is_intrinsic } from "../echo-util"; +import { arrayFromSpread_id, apply_id, constructSuperApply_id } from "../common-ids"; + +// split `args` into %arrayFromSpread operands: runs of plain arguments +// become array literals, spread arguments pass through as iterables +function spreadChunks(args) { + let chunks = []; + let current = []; + for (let el of args) { + if (el.type === b.SpreadElement) { + if (current.length > 0) { + chunks.push(b.arrayExpression(current)); + current = []; + } + chunks.push(el.argument); + } else { + current.push(el); + } + } + if (current.length > 0) chunks.push(b.arrayExpression(current)); + return chunks; +} export class DesugarSpread extends TransformPass { visitArrayExpression(n) { @@ -92,6 +112,27 @@ export class DesugarSpread extends TransformPass { if (!needs_desugaring) return n; + // super(...args), already desugared by DesugarClasses (which runs + // first) into %constructSuper(ref, ...args): the intrinsic isn't a + // value and can't be .apply'd — use the runtime's apply form. + // (spread super calls didn't compile at all before this.) + if (is_intrinsic(n, "%constructSuper")) { + let super_ref = n.arguments[0]; + let chunks = spreadChunks(n.arguments.slice(1)); + if (chunks.every((a) => a.type === b.ArrayExpression)) { + // spreads of array literals only: flatten back to a plain + // %constructSuper (holes become undefined, as below) + let flat = []; + for (let a of chunks) + flat = flat.concat(a.elements.map((el) => (el === null ? b.undefinedLit() : el))); + n.arguments = [super_ref].concat(flat); + } else { + n.callee = constructSuperApply_id; + n.arguments = [super_ref, intrinsic(arrayFromSpread_id, chunks)]; + } + return n; + } + let new_args = []; let current_elements = []; for (let el of n.arguments) { diff --git a/test/eir-class1.js b/test/eir-class1.js new file mode 100644 index 00000000..1b72eb4d --- /dev/null +++ b/test/eir-class1.js @@ -0,0 +1,61 @@ +// classes through the EIR pipeline (DesugarClasses runs pre-EIR; the +// class intrinsics lower via lib/eir/intrinsics.js) + +function basics() { + class P { + constructor(x) { this.x = x; } + val() { return this.x; } + static tag() { return "P!"; } + } + let p = new P(7); + return p.val() + "/" + P.tag(); +} + +function derived(v) { + class A { + constructor(x) { this.x = x; } + describe() { return "A(" + this.x + ")"; } + } + class B extends A { + constructor(x) { super(x + 1); this.v = v; } + describe() { return "B[" + super.describe() + "," + this.v + "]"; } + } + let b = new B(10); + return b.describe() + " " + (b instanceof A) + (b instanceof B); +} + +function defaultCtor() { + class A { constructor() { this.who = "A"; } hi() { return "hi " + this.who; } } + class B extends A {} + return new B().hi(); +} + +function accessors() { + class T { + constructor() { this._n = 1; } + get n() { return this._n * 10; } + set n(v) { this._n = v + 1; } + } + let t = new T(); + let before = t.n; + t.n = 4; + return before + "," + t.n; +} + +function classExpr(k) { + let C = class { constructor() { this.k = k; } }; + return new C().k; +} + +function superSpread() { + class A { constructor(a, b, c) { this.sum = a + b + c; } } + class B extends A { constructor(xs) { super(...xs); } } + return new B([1, 2, 3]).sum; +} + +console.log(basics()); +console.log(derived("z")); +console.log(defaultCtor()); +console.log(accessors()); +console.log(classExpr("kk")); +console.log(superSpread()); From ee3f9834d3119b2ca04ad470f999dc309d7e746c Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 20:17:15 -0700 Subject: [PATCH 033/146] eir: generators pre-EIR (coroutine-style); fix class generator methods MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit DesugarGeneratorFunctions joins the pre-EIR list (classes -> generators -> spread, the legacy relative order). Coroutine-style compilation stands: the generator body is an ordinary closure run on its own stack (runtime ucontext switch, conservative-scanned by the GC), so both intrinsics are plain call_runtime entries — %makeGenerator -> _ejs_generator_new, %generatorYield -> _ejs_generator_yield. No new ops, no state-machine transform; EIR's whole instruction set applies unchanged inside generator bodies. (A state-machine lowering to kill the 512KB-per-live-generator stack remains a clean future optimization — EIR's explicit CFG is the right substrate for it.) The yield* desugar now emits well-formed AST: statement-position `yield* x;` replaces the whole ExpressionStatement with the for-of delegate loop, and the loop body wraps its %generatorYield in an ExpressionStatement (both shapes were statements grafted into expression slots — tolerated by the legacy visitors, rejected by EIR). Expression-position yield* keeps the old malformed shape and falls back per function. Legacy bug #15: class generator methods never worked — create_proto_method/create_static_method rebuild the method as a fresh FunctionExpression and b.functionExpression hardcodes generator: false, so `*method() {}` yields were left undesugared ("unknown parse node type YieldExpression"). The flag is now preserved; the two kangax conformance tests this un-xfailed (generator20/21: shorthand and computed generator methods in classes) are no longer marked xfail. Generators touching `this` fall back gracefully for now (the desugared body is an arrow, and arrow lexical-this is still guarded). Validated: test-eir (2 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, test/eir-generator1.js (both pipelines, output identical to node). Self-hosted --ir stays 424/424. Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 20 ++++--- lib/eir/intrinsics.js | 6 +++ lib/eir/tests.js | 23 +++++++++ lib/passes/desugar-classes.js | 4 ++ lib/passes/desugar-generator-functions.js | 36 ++++++++++--- test/eir-generator1.js | 63 +++++++++++++++++++++++ test/generator20.js | 1 - test/generator21.js | 1 - 8 files changed, 139 insertions(+), 15 deletions(-) create mode 100644 test/eir-generator1.js diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index 2bcd3a8b..f89ed887 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -40,15 +40,22 @@ const enable_hoist_func_decls_pass = true; // (its own %-intrinsic handling predates EIR), so both pipelines see one // AST. // -// DesugarClasses runs before DesugarSpread (the legacy relative order): -// super(...args) desugars into %constructSuper(ref, ...args) first, and -// the spread pass then rewrites what remains. running these before -// DesugarImportExport means `export class Foo` reaches it as -// `export let Foo = (...)` — the same %moduleSetSlot store. +// DesugarClasses, then DesugarGeneratorFunctions, then DesugarSpread — +// the legacy relative order: super(...args) desugars into +// %constructSuper(ref, ...args) first, generator methods desugar as plain +// function expressions, and the spread pass then rewrites what remains. +// running these before DesugarImportExport means `export class Foo` +// reaches it as `export let Foo = (...)` — the same %moduleSetSlot +// store. // // DesugarSpread also stays in the main list below as a safety net for // spreads synthesized by later passes (currently none). -const pre_eir_passes = [DesugarClasses, DesugarSpread, DesugarMetaProperties]; +const pre_eir_passes = [ + DesugarClasses, + DesugarGeneratorFunctions, + DesugarSpread, + DesugarMetaProperties, +]; const passes = [ DesugarImportExport, @@ -56,7 +63,6 @@ const passes = [ DesugarDestructuring, DesugarUpdateAssignments, DesugarTemplates, - DesugarGeneratorFunctions, DesugarArrowFunctions, DesugarDefaults, DesugarForOf, diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js index 1bd34f53..5010a3dd 100644 --- a/lib/eir/intrinsics.js +++ b/lib/eir/intrinsics.js @@ -38,4 +38,10 @@ export const eir_intrinsics = { // DesugarMetaProperties (new.target) "%getNewTarget": { op: "new_target" }, + + // DesugarGeneratorFunctions: coroutine-style — the generator body is + // an ordinary closure run on its own stack (runtime ucontext switch), + // so both intrinsics are plain runtime calls + "%makeGenerator": { runtime: "make_generator" }, + "%generatorYield": { runtime: "generator_yield" }, }; diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 9f984629..495c6fa9 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -15,6 +15,7 @@ import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; import { DesugarClasses } from "../passes/desugar-classes"; +import { DesugarGeneratorFunctions } from "../passes/desugar-generator-functions"; import { DesugarMetaProperties } from "../passes/desugar-metaproperties"; import * as esprima from "../../external-deps/esprima/esprima-es6"; @@ -390,6 +391,7 @@ function parseFnPreEIR(src) { let ast = esprima.parse(src, { loc: true, raw: true }); let opts = { debug_passes: new Set() }; ast = new DesugarClasses(opts).visit(ast); + ast = new DesugarGeneratorFunctions(opts).visit(ast); ast = new DesugarSpread(opts).visit(ast); ast = new DesugarMetaProperties(opts).visit(ast); for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; @@ -471,6 +473,27 @@ test("lower: class accessors lower via make_object + defineProperties", () => { assertContains(all, 'keys=["get", "set"]'); }); +test("lower: generator function lowers via make_generator/generator_yield", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") + ); + verifyModule(r.module); + let all = r.module.functions.map((fn) => printFunction(fn)).join("\n"); + assertContains(all, 'name="make_generator"'); + assertContains(all, 'name="generator_yield"'); +}); + +test("lower: statement-position yield* lowers as a for-of delegate loop", () => { + let r = lowerFunctionNode( + parseFnPreEIR( + "function f() { function* inner() { yield 1; } function* outer() { yield* inner(); } return outer(); }" + ) + ); + verifyModule(r.module); + let all = r.module.functions.map((fn) => printFunction(fn)).join("\n"); + assertContains(all, 'name="generator_yield"'); +}); + test("lower: program with several functions", () => { let ast = esprima.parse( "function one() { return 1; } function two() { return one() + 1; }", diff --git a/lib/passes/desugar-classes.js b/lib/passes/desugar-classes.js index 42a70ccb..eda76cb1 100644 --- a/lib/passes/desugar-classes.js +++ b/lib/passes/desugar-classes.js @@ -385,6 +385,9 @@ export class DesugarClasses extends TransformPass { ast_method.value.defaults, ast_method.value.rest ); + // b.functionExpression hardcodes generator: false — losing the + // flag here left `*method() {}` yields undesugared + method.generator = ast_method.value.generator; let Object_defineProperty = b.memberExpression(Object_id, defineProperty_id); let defineProperty_args = b.objectExpression([ @@ -406,6 +409,7 @@ export class DesugarClasses extends TransformPass { ast_method.value.defaults, ast_method.value.rest ); + method.generator = ast_method.value.generator; let Object_defineProperty = b.memberExpression(Object_id, defineProperty_id); let defineProperty_args = b.objectExpression([ diff --git a/lib/passes/desugar-generator-functions.js b/lib/passes/desugar-generator-functions.js index 3e853df7..faa38043 100644 --- a/lib/passes/desugar-generator-functions.js +++ b/lib/passes/desugar-generator-functions.js @@ -54,15 +54,39 @@ export class DesugarGeneratorFunctions extends TransformPass { return n; } + // yield* x → for (let %_yield of x) %generatorYield(%gen, %_yield); + // (n.argument must already be visited) + delegateLoop(n) { + let yield_id = b.identifier(`%_yield_${this.genGen()}`); + return b.forOfStatement( + b.letDeclaration(yield_id, null), + n.argument, + b.blockStatement([ + b.expressionStatement( + intrinsic(generatorYield_id, [this.mapping[0], yield_id]) + ), + ]) + ); + } + + // statement-position yield* replaces the whole ExpressionStatement + // with the for-of loop, keeping the AST well-formed. (grafting the + // loop into the expression slot — what the expression-position case + // in visitYield still produces — only works because the legacy + // visitors don't distinguish statements from expressions; EIR falls + // back on that shape.) + visitExpressionStatement(n) { + if (n.expression.type === b.YieldExpression && n.expression.delegate) { + n.expression.argument = this.visit(n.expression.argument); + return this.delegateLoop(n.expression); + } + return super.visitExpressionStatement(n); + } + visitYield(n) { n.argument = this.visit(n.argument); if (n.delegate) { - let yield_id = b.identifier(`%_yield_${this.genGen()}`); - return b.forOfStatement( - b.letDeclaration(yield_id, null), - n.argument, - b.blockStatement([intrinsic(generatorYield_id, [this.mapping[0], yield_id])]) - ); + return this.delegateLoop(n); } else { return intrinsic(generatorYield_id, [this.mapping[0], n.argument]); } diff --git a/test/eir-generator1.js b/test/eir-generator1.js new file mode 100644 index 00000000..395f6258 --- /dev/null +++ b/test/eir-generator1.js @@ -0,0 +1,63 @@ +// generators through the EIR pipeline (DesugarGeneratorFunctions runs +// pre-EIR; coroutine-style — %makeGenerator/%generatorYield lower as +// runtime calls) + +function collect(g) { + let out = []; + for (let v of g) out.push(v); + return out.join(","); +} + +function basic() { + function* seq() { yield 1; yield 2; yield 3; } + return collect(seq()); +} + +function loopYield(n) { + function* upto() { for (let i = 0; i < n; i++) yield i * 10; } + return collect(upto()); +} + +function delegate() { + function* inner() { yield "b"; yield "c"; } + function* outer() { yield "a"; yield* inner(); yield "d"; } + return collect(outer()); +} + +function sentValues() { + function* echoing() { + let got = yield "first"; + let got2 = yield "got:" + got; + yield "got2:" + got2; + } + let g = echoing(); + let a = g.next().value; + let b = g.next("one").value; + let c = g.next("two").value; + return a + "/" + b + "/" + c; +} + +function doneProtocol() { + function* two() { yield 1; yield 2; } + let g = two(); + g.next(); g.next(); + let r = g.next(); + return r.done + "," + r.value; +} + +function genMethod() { + class Range { + constructor(n) { this.n = n; } + *items() { for (let i = 0; i < this.n; i++) yield i; } + } + // the desugared body is an arrow touching `this` -- exercises the + // class + generator pre-EIR combination even when it falls back + return collect(new Range(3).items()); +} + +console.log(basic()); +console.log(loopYield(4)); +console.log(delegate()); +console.log(sentValues()); +console.log(doneProtocol()); +console.log(genMethod()); diff --git a/test/generator20.js b/test/generator20.js index 349d5dd7..ec6a2639 100644 --- a/test/generator20.js +++ b/test/generator20.js @@ -1,5 +1,4 @@ // generator: babel-node -// xfail: generator support isn't 100% // "shorthand generator methods, classes" from kangax diff --git a/test/generator21.js b/test/generator21.js index ce15470d..7a01c4ce 100644 --- a/test/generator21.js +++ b/test/generator21.js @@ -1,5 +1,4 @@ // generator: babel-node -// xfail: generator support isn't 100% // "computed shorthand generators, classes" From 99ada965d40157aabcd4c37ed33144451b16c2f7 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 20:44:51 -0700 Subject: [PATCH 034/146] eir: destructuring pre-EIR; pattern defaults work now MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The first DesugarDestructuring run joins the pre-EIR list (classes -> destructuring -> generators -> spread, the legacy relative order); the second run stays legacy to clean up the patterns DesugarForOf re-emits. %createIteratorWrapper lowers as a call_runtime entry (_ejs_iterator_wrapper_new). Since the pass now runs before DesugarRestParameters, a trailing ...rest param passes through it untouched — EIR handles rest natively, the legacy rest pass strips it later. AssignmentPattern (pattern defaults, `let {a = 5} = o`) is now supported instead of a compiler panic (legacy bug #16 — node-visitor had no AssignmentPattern dispatch and the desugar had no handling, so any traversal of one blew up). bindTarget() lands the raw value in a temp and emits `%dt === undefined ? dflt : %dt`, recursing for nested pattern targets. Two behavioral corrections ride along: nested patterns bind through a temp instead of re-evaluating the member chain per inner property, and `let {b: {c}} = x` no longer phantom-binds `b` (node doesn't either). Assignment-position array rests parse as RestElement (declaration-position as SpreadElement); both bind via getRest now. EIR also learns unary `void` (evaluate for effects, produce undefined): the desugar's undefinedLit() emits `void 0`, which would otherwise have been a LATE lowering failure abandoning the whole file's EIR set. Value-position identifiers minted fresh per use throughout the pass (the bug-#12 rule); Symbol.iterator member expressions per call site. Validated: test-eir (3 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, test/eir-destructure1.js (both pipelines, output identical to node). Self-hosted --ir stays 424/424. Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 22 ++++-- lib/eir/intrinsics.js | 3 + lib/eir/lower.js | 5 ++ lib/eir/tests.js | 27 +++++++ lib/node-visitor.js | 9 +++ lib/passes/desugar-destructuring.js | 117 +++++++++++++++++----------- test/eir-destructure1.js | 62 +++++++++++++++ 7 files changed, 190 insertions(+), 55 deletions(-) create mode 100644 test/eir-destructure1.js diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index f89ed887..7fa0a89d 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -40,18 +40,25 @@ const enable_hoist_func_decls_pass = true; // (its own %-intrinsic handling predates EIR), so both pipelines see one // AST. // -// DesugarClasses, then DesugarGeneratorFunctions, then DesugarSpread — -// the legacy relative order: super(...args) desugars into -// %constructSuper(ref, ...args) first, generator methods desugar as plain -// function expressions, and the spread pass then rewrites what remains. -// running these before DesugarImportExport means `export class Foo` -// reaches it as `export let Foo = (...)` — the same %moduleSetSlot -// store. +// DesugarClasses, then DesugarDestructuring, then +// DesugarGeneratorFunctions, then DesugarSpread — the legacy relative +// order: super(...args) desugars into %constructSuper(ref, ...args) +// first, patterns unfold into member/iterator reads, generator methods +// desugar as plain function expressions, and the spread pass then +// rewrites what remains. running these before DesugarImportExport means +// `export class Foo` reaches it as `export let Foo = (...)` — the +// same %moduleSetSlot store. +// +// only the FIRST destructuring run hoists; the second (below) cleans up +// the patterns DesugarForOf re-emits. trailing ...rest params pass +// through it untouched (EIR is native; the legacy rest pass strips them +// later). // // DesugarSpread also stays in the main list below as a safety net for // spreads synthesized by later passes (currently none). const pre_eir_passes = [ DesugarClasses, + DesugarDestructuring, DesugarGeneratorFunctions, DesugarSpread, DesugarMetaProperties, @@ -60,7 +67,6 @@ const pre_eir_passes = [ const passes = [ DesugarImportExport, DesugarRestParameters, - DesugarDestructuring, DesugarUpdateAssignments, DesugarTemplates, DesugarArrowFunctions, diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js index 5010a3dd..4b5f37fa 100644 --- a/lib/eir/intrinsics.js +++ b/lib/eir/intrinsics.js @@ -44,4 +44,7 @@ export const eir_intrinsics = { // so both intrinsics are plain runtime calls "%makeGenerator": { runtime: "make_generator" }, "%generatorYield": { runtime: "generator_yield" }, + + // DesugarDestructuring (array patterns iterate via a runtime wrapper) + "%createIteratorWrapper": { runtime: "iterator_wrapper_new" }, }; diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 9fdc8cf7..7e0fd742 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -445,6 +445,11 @@ class LowerFunction { case "typeof": arg = this.expr(n.argument); return this.b.emit("typeof", [arg], {}); + case "void": + // evaluate for side effects, produce undefined (the + // desugar passes' undefinedLit() emits `void 0`) + this.expr(n.argument); + return this.b.constUndefined(); case "delete": { // only member expressions (matching the legacy visitUnary) let m = n.argument; diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 495c6fa9..88547ad9 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -15,6 +15,7 @@ import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; import { DesugarClasses } from "../passes/desugar-classes"; +import { DesugarDestructuring } from "../passes/desugar-destructuring"; import { DesugarGeneratorFunctions } from "../passes/desugar-generator-functions"; import { DesugarMetaProperties } from "../passes/desugar-metaproperties"; import * as esprima from "../../external-deps/esprima/esprima-es6"; @@ -391,6 +392,7 @@ function parseFnPreEIR(src) { let ast = esprima.parse(src, { loc: true, raw: true }); let opts = { debug_passes: new Set() }; ast = new DesugarClasses(opts).visit(ast); + ast = new DesugarDestructuring(opts).visit(ast); ast = new DesugarGeneratorFunctions(opts).visit(ast); ast = new DesugarSpread(opts).visit(ast); ast = new DesugarMetaProperties(opts).visit(ast); @@ -473,6 +475,31 @@ test("lower: class accessors lower via make_object + defineProperties", () => { assertContains(all, 'keys=["get", "set"]'); }); +test("lower: array destructuring lowers via %createIteratorWrapper", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(xs) { let [a, ...rest] = xs; return a + rest.length; }") + ); + verifyModule(r.module); + assertContains(printFunction(r.fn), 'name="iterator_wrapper_new"'); +}); + +test("lower: pattern defaults lower as undefined checks", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(o) { let { a = 5 } = o; return a; }") + ); + verifyModule(r.module); + let printed = printFunction(r.fn); + assertContains(printed, "strict_eq"); + assertContains(printed, "get_prop_atom"); +}); + +test("lower: unary void evaluates its argument and yields undefined", () => { + let { fn } = lowerOne("function f(g) { return void g(); }"); + let printed = printFunction(fn); + assertContains(printed, "call"); + assertContains(printed, 'kind="undefined"'); +}); + test("lower: generator function lowers via make_generator/generator_yield", () => { let r = lowerFunctionNode( parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") diff --git a/lib/node-visitor.js b/lib/node-visitor.js index 9a13b75d..0b3b6ba3 100644 --- a/lib/node-visitor.js +++ b/lib/node-visitor.js @@ -56,6 +56,9 @@ export class TreeVisitor { case b.AssignmentExpression: rv = this.visitAssignmentExpression(n, ...args); break; + case b.AssignmentPattern: + rv = this.visitAssignmentPattern(n, ...args); + break; case b.BinaryExpression: rv = this.visitBinaryExpression(n, ...args); break; @@ -569,6 +572,12 @@ export class TreeVisitor { return n; } + visitAssignmentPattern(n, ...args) { + // the left side is a binding pattern, not a reference + n.right = this.visit(n.right, ...args); + return n; + } + visitObjectPattern(n, ...args) { n.properties = this.visitArray(n.properties, ...args); return n; diff --git a/lib/passes/desugar-destructuring.js b/lib/passes/desugar-destructuring.js index a94e1d8c..7feac205 100644 --- a/lib/passes/desugar-destructuring.js +++ b/lib/passes/desugar-destructuring.js @@ -17,30 +17,58 @@ import { let gen = startGenerator(); let fresh = () => b.identifier(`%destruct_tmp${gen()}`); -let Symbol_iterator = b.memberExpression(Symbol_id, iterator_id); +// note: value-position identifiers must be fresh AST nodes per use (the +// EIR scope analysis resolves references in a node-keyed map), so the +// Symbol.iterator member expression is minted per call site +function symbolIterator() { + return b.memberExpression(b.identifier(Symbol_id.name), iterator_id); +} + +// bind `target` (an Identifier or a nested pattern) to `value`, applying +// the AssignmentPattern default `dflt` if present: +// let %dt = value, target = %dt === undefined ? dflt : %dt; +function bindTarget(target, value, dflt, bindings) { + if (dflt) { + let dt = fresh(); + bindings.push({ key: dt, value: value, need_decl: true }); + value = b.conditionalExpression( + b.binaryExpression(b.identifier(dt.name), "===", b.undefinedLit()), + dflt, + b.identifier(dt.name) + ); + } + + if (target.type === b.Identifier) { + bindings.push({ key: target, value: value }); + return; + } + + // a nested pattern: land the (possibly defaulted) value in a temp and + // recurse + let pt = fresh(); + bindings.push({ key: pt, value: value, need_decl: true }); + if (target.type === b.ObjectPattern) + createObjectPatternBindings(b.identifier(pt.name), target, bindings); + else if (target.type === b.ArrayPattern) + createArrayPatternBindingsUsingIterator(b.identifier(pt.name), target, bindings); + else throw new Error(`bindTarget: target.type = ${target.type}`); +} // given an assignment { pattern } = id // function createObjectPatternBindings(id, pattern, bindings) { for (let prop of pattern.properties) { let memberexp = b.memberExpression(id, prop.key); + if (prop.computed) memberexp.computed = true; - if (prop.value.type === b.Identifier) { - if (prop.computed) { - bindings.push({ key: prop.value, value: memberexp }); - memberexp.computed = true; - } else bindings.push({ key: prop.value, value: memberexp }); - } else if (prop.value.type === b.ObjectPattern) { - bindings.push({ key: prop.key, value: memberexp }); - - createObjectPatternBindings(memberexp, prop.value, bindings); - } else if (prop.value.type === b.ArrayPattern) { - bindings.push({ key: prop.key, value: memberexp }); - - createArrayPatternBindingsUsingIterator(memberexp, prop.value, bindings); - } else { - throw new Error(`createObjectPatternBindings: prop.value.type = ${prop.value.type}`); + let target = prop.value; + let dflt = null; + if (target.type === b.AssignmentPattern) { + dflt = target.right; + target = target.left; } + + bindTarget(target, memberexp, dflt, bindings); } } @@ -52,7 +80,7 @@ function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { let wrapper_id = fresh(); bindings.push({ key: iter_id, - value: b.callExpression(b.memberExpression(id, Symbol_iterator, true), []), + value: b.callExpression(b.memberExpression(id, symbolIterator(), true), []), need_decl: true, }); bindings.push({ @@ -61,45 +89,35 @@ function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { need_decl: true, }); + let nextValue = () => + b.callExpression(b.memberExpression(b.identifier(wrapper_id.name), getNextValue_id), []); + for (let el of pattern.elements) { if (seen_spread) reportError(SyntaxError, "elements after spread element in array pattern", el.loc); if (el == null) { - bindings.push({ - key: fresh() /*unused*/, - value: b.callExpression(b.memberExpression(wrapper_id, getNextValue_id), []), - }); - } else if (el.type == b.Identifier) { - bindings.push({ - key: el, - value: b.callExpression(b.memberExpression(wrapper_id, getNextValue_id), []), - }); - } else if (el.type == b.ObjectPattern) { - let p_id = fresh(); - - bindings.push({ - key: p_id, - value: b.callExpression(b.memberExpression(wrapper_id, getNextValue_id), []), - }); - - createObjectPatternBindings(p_id, el, bindings); - } else if (el.type === b.ArrayPattern) { - let p_id = fresh(); - - bindings.push({ - key: p_id, - value: b.callExpression(b.memberExpression(wrapper_id, getNextValue_id), []), - }); - - createArrayPatternBindingsUsingIterator(p_id, el, bindings); - } else if (el.type === b.SpreadElement) { + bindings.push({ key: fresh() /*unused*/, value: nextValue() }); + } else if (el.type === b.SpreadElement || el.type === b.RestElement) { + // declaration-position rests parse as SpreadElement, + // assignment-position ones as RestElement bindings.push({ key: el.argument, - value: b.callExpression(b.memberExpression(wrapper_id, getRest_id), []), + value: b.callExpression( + b.memberExpression(b.identifier(wrapper_id.name), getRest_id), + [] + ), }); seen_spread = true; - } else throw new Error(`createArrayPatternBindingsUsingIterator ${el.type}`); + } else { + let target = el; + let dflt = null; + if (target.type === b.AssignmentPattern) { + dflt = target.right; + target = target.left; + } + bindTarget(target, nextValue(), dflt, bindings); + } } } @@ -147,6 +165,11 @@ export class DesugarDestructuring extends TransformPass { } else if (ptype === b.Identifier) { // we just pass this along new_params.push(p); + } else if (ptype === b.RestElement && p.argument.type === b.Identifier) { + // this pass runs pre-EIR now, BEFORE DesugarRestParameters: + // a trailing ...rest stays in place (EIR handles it + // natively; the legacy rest pass strips it later) + new_params.push(p); } else { throw new Error( `unhandled type of formal parameter in DesugarDestructuring ${ptype}` diff --git a/test/eir-destructure1.js b/test/eir-destructure1.js new file mode 100644 index 00000000..3a0f4e20 --- /dev/null +++ b/test/eir-destructure1.js @@ -0,0 +1,62 @@ +// destructuring through the EIR pipeline (the first DesugarDestructuring +// run happens pre-EIR; %createIteratorWrapper lowers as a runtime call) + +function objPattern(o) { + let { a, b: renamed } = o; + return a + "," + renamed; +} + +function nestedPattern(o) { + let { x: { y }, z } = o; + return y + "," + z; +} + +function arrayPattern(xs) { + let [p, , q] = xs; + return p + "," + q; +} + +function arrayRest(xs) { + let [head, ...tail] = xs; + return head + "/" + tail.join("+"); +} + +function patternDefaults(o) { + // AssignmentPattern in patterns: panicked the whole compiler before + let { a = 10, b = 20 } = o; + let [c = 30, d = 40] = o.arr; + return [a, b, c, d].join(","); +} + +function nestedDefault(o) { + let { pos: { x = 1, y = 2 } = {} } = o; + return x + "," + y; +} + +function paramPattern({ a, b }, [c]) { + return a + b + c; +} + +function assignPosition(o) { + let a, b; + ({ a, b } = o); + let c, d; + [c, d] = [b, a]; + return a + "," + b + "/" + c + "," + d; +} + +function swap(x, y) { + [x, y] = [y, x]; + return x + "," + y; +} + +console.log(objPattern({ a: 1, b: 2 })); +console.log(nestedPattern({ x: { y: "Y" }, z: "Z" })); +console.log(arrayPattern(["p", "skip", "q"])); +console.log(arrayRest([1, 2, 3, 4])); +console.log(patternDefaults({ b: 99, arr: [undefined, 44] })); +console.log(nestedDefault({})); +console.log(nestedDefault({ pos: { x: 7 } })); +console.log(paramPattern({ a: 1, b: 2 }, [3])); +console.log(assignPosition({ a: "A", b: "B" })); +console.log(swap("l", "r")); From 1bcc3f45788fbf97de5578e06b8cb833f3c81ec1 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 20:45:20 -0700 Subject: [PATCH 035/146] eir: defaults/rest stay legacy-only (evaluated, documented) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Phase 2 evaluation of the remaining desugar passes: DesugarDefaults and DesugarRestParameters do not hoist. EIR's native handling is strictly better on both counts — per-parameter conditionals only where defaults exist (vs. argc-guarded %getArg loads for every parameter), and the branch-free rest_args select (vs. %arrayFromRest, whose legacy handler mutates the visitor's scope to register the rest binding). The passes keep serving the legacy pipeline (fallback functions and the toplevel) and are deleted with it in phase 4. Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index 7fa0a89d..f2ed8d11 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -56,6 +56,17 @@ const enable_hoist_func_decls_pass = true; // // DesugarSpread also stays in the main list below as a safety net for // spreads synthesized by later passes (currently none). +// +// DesugarDefaults and DesugarRestParameters deliberately do NOT hoist: +// EIR handles both natively and strictly better. DesugarDefaults +// rewrites EVERY parameter (defaulted or not) into an argc-guarded +// `let p = %getArg(i, dflt)` load, where EIR emits a conditional only +// for parameters that have defaults and keeps the rest as direct SSA +// values. DesugarRestParameters' %arrayFromRest needs the legacy +// handler's scope mutation (it registers the rest name in the visitor's +// topScope), where EIR's rest_args op is a branch-free select. Both +// passes serve only the legacy pipeline (fallback functions and the +// toplevel) and die with it in phase 4 rather than hoisting. const pre_eir_passes = [ DesugarClasses, DesugarDestructuring, From bb6f22ed644504d55901b2bb65bb0af87fdedb72 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 21:07:36 -0700 Subject: [PATCH 036/146] eir: arrow lexical `this` natively; fix two legacy arrow-this bugs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The arrow-this guard is gone: an arrow's `this` resolves to the nearest non-arrow ancestor's captured this binding, mirroring the `arguments` machinery — scope analysis creates a synthetic captured binding on the owner, the owner stores its this param into its env at entry, and the arrow reads it through the env chain (works through nested arrows, loop envs, and closures). super() in a derived constructor keeps the env copy in sync when it rebinds this, so arrows created after super see the constructed object. This un-fallbacks generators and class methods that touch `this` (the generator desugar wraps bodies in arrows). A candidate whose root is ITSELF an arrow still falls back — its lexical this is the module toplevel's. Two more legacy bugs (#18, #19) surfaced running the new suite test on the legacy stages: - DesugarArrowFunctions kept ONE `prepend` slot per function, so an arrow using both `this` and `arguments` lost whichever alias declaration was created first ("undeclared identifier _arguments_N"). prepends is a list now. - the `let _this_N = this` snapshot lands at function top — in a derived constructor that's BEFORE super() runs, so arrows created after super captured undefined. The alias is re-snapshotted after every top-level %constructSuper/%constructSuperApply statement. (Arrows created before super keep the undefined; echojs has no TDZ.) Validated: test-eir (2 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, test/eir-arrowthis1.js (method arrows, nested arrows, mixed local+this captures, detached arrows keeping their lexical this, generator methods, post-super ctor arrows, arguments in arrows — both pipelines, output identical to node). Self-hosted --ir stays 424/424. Co-Authored-By: Claude Fable 5 --- lib/eir/lower.js | 40 ++++++++---- lib/eir/scopes.js | 32 ++++++++-- lib/eir/tests.js | 28 +++++++++ lib/passes/desugar-arrow-functions.js | 41 +++++++++++-- test/eir-arrowthis1.js | 87 +++++++++++++++++++++++++++ 5 files changed, 205 insertions(+), 23 deletions(-) create mode 100644 test/eir-arrowthis1.js diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 7e0fd742..493a3c45 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -20,16 +20,17 @@ // var/let/const, assignment (= and compound), update (++/--), // binary/logical/unary operators, member access, calls, new, this, // sequence/array/object literals, untagged template literals, function -// declarations and expressions, arrow functions that don't use `this` -// (full closure support), default/rest parameters, `arguments`, if/else, -// while, do-while, for, for-of, for-in, switch, break/continue, return, -// throw, try/catch (unwind edges), try/finally (finalizer duplication), -// and the %-intrinsic calls listed in intrinsics.js (produced by the -// pre-EIR desugar passes, e.g. %arrayFromSpread). +// declarations and expressions, arrow functions (full closure support, +// lexical `this` via the owner's captured this binding), default/rest +// parameters, `arguments`, if/else, while, do-while, for, for-of, +// for-in, switch, break/continue, return, throw, try/catch (unwind +// edges), try/finally (finalizer duplication), per-iteration loop +// environments, and the %-intrinsic calls listed in intrinsics.js +// (produced by the pre-EIR desugar passes, e.g. %arrayFromSpread). // -// Not yet: tagged templates, arrows using lexical `this`, closures over -// let/const loop variables (per-iteration envs), labeled break/continue, -// getters/setters. +// Not yet: tagged templates, labeled break/continue, `this` in a +// candidate whose root is itself an arrow (needs the module toplevel's +// this). import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; @@ -133,6 +134,11 @@ class LowerFunction { this.writeBinding(info.argumentsBinding, a); } + // an arrow below captures our `this`: store it in the env (kept + // in sync by intrinsicCall when super() rebinds this) + if (info.thisBinding && info.thisBinding.captured) + this.writeBinding(info.thisBinding, this.thisParam); + // the rest parameter materializes from the trailing arguments if (info.restBinding) { let rest = this.b.emit("rest_args", [], { index: info.params.length }); @@ -282,8 +288,13 @@ class LowerFunction { return this.literal(n); case b.Identifier: return this.identifier(n); - case b.ThisExpression: + case b.ThisExpression: { + // resolved to a binding = an arrow's lexical this (the + // owner's captured this, read through the env chain) + let binding = this.analysis.resolve(n); + if (binding) return this.readBinding(binding); return this.b.readVariable("%this", this.b.cur); + } case b.BinaryExpression: return this.binary(n); case b.LogicalExpression: @@ -692,8 +703,13 @@ class LowerFunction { if (intr.op) v = this.b.emit(intr.op, args, {}); else v = this.b.emit("call_runtime", args, { name: intr.runtime, void: intr.void }); // super() in a derived constructor: the constructed object becomes - // `this` for the rest of the function - if (intr.rebindThis) this.b.writeVariable("%this", this.b.cur, v); + // `this` for the rest of the function — including the env copy + // arrows read their lexical this from + if (intr.rebindThis) { + this.b.writeVariable("%this", this.b.cur, v); + if (this.info.thisBinding && this.info.thisBinding.captured) + this.writeBinding(this.info.thisBinding, v); + } return v; } diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index f947c1ae..9f5675c2 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -655,9 +655,9 @@ export class ScopeAnalysis { return; } case b.ArrowFunctionExpression: { - // arrows lower as ordinary closures, which is only correct - // while they don't touch the lexical `this` (see the - // ThisExpression case below) + // arrows lower as ordinary closures; lexical `this` reads + // resolve to the owner function's captured this binding + // (see the ThisExpression case below) let name = `arrow${this.anon_gen++}`; this.enterFunction(n, this.curFn ? `${this.curFn.name}.${name}` : name); if (n.body.type === b.BlockStatement) this.walkFnBody(n.body); @@ -665,10 +665,30 @@ export class ScopeAnalysis { this.leaveFunction(); return; } - case b.ThisExpression: - if (this.curFn && this.curFn.node.type === b.ArrowFunctionExpression) - throw LowerNotSupported("lexical `this` in an arrow function", n.loc); + case b.ThisExpression: { + // an arrow's `this` is lexical: capture the nearest + // non-arrow ancestor's this in its environment (the same + // shape as the `arguments` machinery above) + let f = this.curFn; + while (f && f.node.type === b.ArrowFunctionExpression) f = f.parent; + // a candidate whose root IS an arrow has no owner here; + // its lexical `this` is the module toplevel's — fall back + if (!f) throw LowerNotSupported("lexical `this` in a toplevel arrow", n.loc); + if (f !== this.curFn) { + if (!f.thisBinding) { + f.thisBinding = new Binding("%this", "this", f); + f.bindings.push(f.thisBinding); + } + f.thisBinding.captured = true; + this.refs.set(n, f.thisBinding); + let g = this.curFn; + while (g && g !== f) { + g.needsParentEnv = true; + g = g.parent; + } + } return; + } case b.SequenceExpression: for (let e of n.expressions) this.walkExpr(e); return; diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 88547ad9..2ddb09a6 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -500,6 +500,34 @@ test("lower: unary void evaluates its argument and yields undefined", () => { assertContains(printed, 'kind="undefined"'); }); +test("lower: arrow lexical this reads the owner's captured this", () => { + let { module, fn } = lowerOne( + "function f() { return function () { return [1].map(() => this.x); }; }" + ); + verifyModule(module); + // the method stores its this into an env; the arrow env_loads it + let method = null; + for (let g of module.functions) if (/anon0$/.test(g.name)) method = g; + assert(method, "expected the method in the module"); + assertContains(printFunction(method), "env_store"); + let arrow = null; + for (let g of module.functions) if (/arrow1$/.test(g.name)) arrow = g; + assert(arrow, "expected the arrow in the module"); + assertContains(printFunction(arrow), "env_load"); +}); + +test("lower: toplevel-arrow candidates using this still fall back", () => { + let ast = esprima.parse("var f = () => this.x;", { loc: true, raw: true }); + let arrow = ast.body[0].declarations[0].init; + let threw = false; + try { + lowerFunctionNode(arrow, "f"); + } catch (e) { + threw = isLowerNotSupported(e); + } + assert(threw, "expected LowerNotSupported"); +}); + test("lower: generator function lowers via make_generator/generator_yield", () => { let r = lowerFunctionNode( parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") diff --git a/lib/passes/desugar-arrow-functions.js b/lib/passes/desugar-arrow-functions.js index 1a244605..064d75f3 100644 --- a/lib/passes/desugar-arrow-functions.js +++ b/lib/passes/desugar-arrow-functions.js @@ -27,7 +27,7 @@ import { TransformPass } from "../node-visitor"; import * as b from "../ast-builder"; -import { startGenerator } from "../echo-util"; +import { startGenerator, is_intrinsic } from "../echo-util"; import { reportError } from "../errors"; function definesThis(n) { @@ -68,7 +68,7 @@ export class DesugarArrowFunctions extends TransformPass { m.this_id = `_this_${this.thisGen()}`; - m.prepend = b.letDeclaration(b.identifier(m.this_id), b.thisExpression()); + m.prepends.push(b.letDeclaration(b.identifier(m.this_id), b.thisExpression())); return b.identifier(m.this_id); } @@ -97,7 +97,7 @@ export class DesugarArrowFunctions extends TransformPass { m.arguments_id = `_arguments_${this.thisGen()}`; - m.prepend = b.letDeclaration(b.identifier(m.arguments_id), n); + m.prepends.push(b.letDeclaration(b.identifier(m.arguments_id), n)); return b.identifier(m.arguments_id); } @@ -113,10 +113,41 @@ export class DesugarArrowFunctions extends TransformPass { } visitFunction(n) { - this.mapping.unshift({ func: n, id: null }); + // prepends is a list: an arrow using BOTH `this` and `arguments` + // needs two declarations (a single .prepend slot lost one) + this.mapping.unshift({ func: n, id: null, prepends: [] }); n = super.visitFunction(n); let m = this.mapping.shift(); - if (m.prepend) n.body.body.unshift(m.prepend); + if (m.prepends.length > 0) { + n.body.body = m.prepends.concat(n.body.body); + // a derived constructor's `this` only exists once super() has + // run: the snapshot at function top reads undefined, so + // re-snapshot after any top-level super call. (arrows created + // BEFORE super keep the undefined — echojs has no TDZ.) + if (m.this_id) { + for (let i = 0; i < n.body.body.length; i++) { + let s = n.body.body[i]; + if ( + s.type === b.ExpressionStatement && + (is_intrinsic(s.expression, "%constructSuper") || + is_intrinsic(s.expression, "%constructSuperApply")) + ) { + n.body.body.splice( + i + 1, + 0, + b.expressionStatement( + b.assignmentExpression( + b.identifier(m.this_id), + "=", + b.thisExpression() + ) + ) + ); + i++; + } + } + } + } return n; } } diff --git a/test/eir-arrowthis1.js b/test/eir-arrowthis1.js new file mode 100644 index 00000000..af608543 --- /dev/null +++ b/test/eir-arrowthis1.js @@ -0,0 +1,87 @@ +// arrow lexical `this` through the EIR pipeline: arrows read the owner +// function's captured this binding via the env chain + +function methodArrow() { + let o = { + tag: "T", + collect: function (xs) { + return xs.map((x) => this.tag + ":" + x).join(","); + }, + }; + return o.collect(["a", "b"]); +} + +function nestedArrows() { + let o = { + n: 5, + make: function () { + return () => () => this.n * 2; + }, + }; + return o.make()()(); +} + +function mixedCapture(prefix) { + let o = { + base: "B", + run: function (k) { + let local = k + 1; + let f = () => prefix + this.base + local; + return f(); + }, + }; + return o.run(1); +} + +function detachedArrow() { + let o = { + who: "owner", + getArrow: function () { + return () => this.who; + }, + }; + let f = o.getArrow(); + let other = { who: "other", f: f }; + // the arrow keeps its lexical this even called as a method of `other` + return other.f(); +} + +function genMethodThis() { + class Range { + constructor(n) { this.n = n; } + *items() { for (let i = 0; i < this.n; i++) yield i; } + } + let out = []; + for (let v of new Range(3).items()) out.push(v); + return out.join(","); +} + +function ctorArrow() { + class A { constructor(x) { this.x = x; } } + class B extends A { + constructor(x) { + super(x); + this.get = () => this.x + 1; + } + } + return new B(41).get(); +} + +function arrowArguments() { + let o = { + m: function () { + let f = () => arguments[0] + "/" + this.k; + return f("ignored"); + }, + k: "K", + }; + return o.m("outer"); +} + +console.log(methodArrow()); +console.log(nestedArrows()); +console.log(mixedCapture("p:")); +console.log(detachedArrow()); +console.log(genMethodThis()); +console.log(ctorArrow()); +console.log(arrowArguments()); From 26c4323e03860a4f70e56b515ae80a873dc8b3c3 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 22:42:04 -0700 Subject: [PATCH 037/146] eir: toplevel-as-EIR behind --ir-toplevel (phase 3 foundation) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Whole modules — toplevel statements, import/export init, and every nested function — lower as one EIR unit. collectEIRToplevel is all-or-nothing per module: module-scope names covered by the refs machinery (exported/promoted slots, const-literal folds) get no local binding — declarations lower as slot stores at their source position (writeModuleSlotInit bypasses the writable guard for the one-time init; const-fold declarators have no storage and drop), references resolve through slots as before. Everything else is an ordinary toplevel local, captured into the toplevel's environment as needed — which covers the promotion-excluded cases candidates could never touch. Import declarations lower to nothing (module resolution lives in the scaffolding; bare imports keep their %moduleGetExotic side effect for parity), export specifier lists and export-default store slots at their statement positions. Direct sibling calls are disabled in this mode: a module function may capture the toplevel env, which a caller's envParam wouldn't carry. The legacy toplevel keeps only module scaffolding: emitEIRToplevel wires the resolve_modules path and forwards the body block into the EIR toplevel function. Its entry branch is deferred to the end of emitModuleResolution — the cached-literal helpers append initializing stores to entry_bb, and nothing may follow a terminator. Riding along, each motivated by the suite sweep: - array holes stay holes (make_array imms.len/indices; array_new force-fill + per-index stores). Legacy bug #20: visitArrayExpression skipped the index increment for holes, so elements after a hole landed at the hole's index. - computed object keys lower (empty make_object + set_prop in source order) — previously a LATE lowering failure. - object-literal get/set accessors are guarded (they'd have silently lowered as plain properties). - captured let/const in loop BODIES get per-iteration envs (all five loop forms) — legacy new-cc had per-iteration semantics here and EIR didn't (test/for5.js caught it). - closures carry source-level display names (make_closure imms.name); the scope-qualified EIR name leaked into Function.prototype.name. - EIR function names are uniquified (same-qualified-name collisions, e.g. two `replace`s in estraverse, were duplicate-symbol errors). Two shapes in this new code MISCOMPILED UNDER THE LEGACY PIPELINE (stage1 builds without --ir, so lib/eir/*.js ships legacy-compiled): lazy this-field init + a template literal in a while condition, and the arrow-based array-hole scan. Both are rewritten in equivalent legacy-safe forms (constructor init + string concat; plain loops) with comments; the underlying legacy codegen bug is undistilled — identical sources run correctly under node — and dies with the legacy middle-end in phase 4. Results: the full suite passes with --ir --ir-toplevel (393 pass, 0 fail); 411/426 test modules lower whole-module (fallbacks: labeled statements, object accessors, tagged templates, block-level function declarations, new-with-spread). Plain --ir is unchanged: test-eir (5 new unit tests), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3 all green. test/eir-toplevel1.js runs identically on all three paths (its expected-out is committed: babel-node isn't on the buck sandbox PATH). Co-Authored-By: Claude Fable 5 --- ejs-es6.js | 5 + lib/compiler.js | 89 ++++++++-- lib/eir/emit.js | 34 +++- lib/eir/integrate.js | 45 +++++ lib/eir/lower.js | 184 ++++++++++++++++++-- lib/eir/ops.js | 10 +- lib/eir/scopes.js | 172 +++++++++++++++++- lib/eir/tests.js | 34 ++++ lib/passes/desugar-destructuring.js | 11 +- test/eir-toplevel1.js | 34 ++++ test/eir-toplevel1/lib1.js | 6 + test/expected/eir-toplevel1.js.expected-out | 11 ++ 12 files changed, 595 insertions(+), 40 deletions(-) create mode 100644 test/eir-toplevel1.js create mode 100644 test/eir-toplevel1/lib1.js create mode 100644 test/expected/eir-toplevel1.js.expected-out diff --git a/ejs-es6.js b/ejs-es6.js index a66c8319..c278aed9 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -109,6 +109,7 @@ let options = { import_variables: [], srcdir: false, ir: false, + ir_toplevel: false, ir_exclude: [], ir_exclude_fn: [], stdout_writer: new Writer(process.stdout), @@ -191,6 +192,10 @@ let args = { flag: "ir", help: "use the EIR (SSA) pipeline for eligible functions, falling back per function.", }, + "--ir-toplevel": { + flag: "ir_toplevel", + help: "(bring-up) with --ir, lower whole modules — toplevel included — as one EIR unit, falling back per module.", + }, "--ir-exclude": { handler: (arg) => { options.ir_exclude = options.ir_exclude.concat(arg.split(",")); diff --git a/lib/compiler.js b/lib/compiler.js index e7914bbf..5027c905 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -27,7 +27,7 @@ import { import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; -import { collectEIRFunctions } from "./eir/integrate"; +import { collectEIRFunctions, collectEIRToplevel } from "./eir/integrate"; import { EIREmitter } from "./eir/emit"; let ir = llvm.IRBuilder; @@ -320,7 +320,17 @@ class LLVMIRVisitor extends TreeVisitor { ir.createBr(this.toplevel_body_bb); ir.setInsertPoint(initialized_bb); - return this.createRet(this.loadUndefinedEjsValue()); + let rv = this.createRet(this.loadUndefinedEjsValue()); + + // an EIR-owned toplevel defers its entry branch to here: all the + // cached-literal initializers this function will ever append to + // entry_bb have been appended by now + if (this.eir_toplevel_entry_bb) { + ir.setInsertPoint(this.eir_toplevel_entry_bb); + ir.createBr(this.resolve_modules_bb); + this.eir_toplevel_entry_bb = null; + } + return rv; } // result should be the landingpad's value @@ -1256,7 +1266,7 @@ class LLVMIRVisitor extends TreeVisitor { } visitFunction(n) { - if (n.eir_module) return this.emitEIRThunk(n); + if (n.eir_module) return n.toplevel ? this.emitEIRToplevel(n) : this.emitEIRThunk(n); if (!n.toplevel) debug.log( @@ -1370,6 +1380,56 @@ class LLVMIRVisitor extends TreeVisitor { return ir_func; } + // an EIR-owned module toplevel: the legacy side keeps only the module + // scaffolding — the initialized-flag check, literal initialization, + // module registration, accessors and import resolution emitted by + // emitModuleResolution — and the body block forwards straight into the + // EIR-emitted toplevel function. + emitEIRToplevel(n) { + let insertBlock = ir.getInsertBlock(); + + if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); + if (!this.eir_emitted) this.eir_emitted = new Map(); + let eir_fns = this.eir_emitted.get(n.eir_module); + if (!eir_fns) { + eir_fns = this.eir_emitter.emitModule(n.eir_module); + this.eir_emitted.set(n.eir_module, eir_fns); + } + let target = eir_fns.get(n.eir_main); + + let ir_func = n.ir_func; + this.currentFunction = ir_func; + let entry_bb = new llvm.BasicBlock("entry", ir_func); + ir_func.entry_bb = entry_bb; // cached-literal helpers want this + ir_func.literalAllocas = Object.create(null); + ir_func.topScope = new Map(); + + let body_bb = new llvm.BasicBlock("body", ir_func); + ir.setInsertPoint(body_bb); + let args = ir_func.args; + let rv = this.abi.createCall( + ir_func, + target.type, + target, + [args[0], args[1], args[2], args[3], args[4]], + "eir_toplevel_result" + ); + this.abi.createRet(ir_func, rv); + + // emitModuleResolution wires resolve_modules_bb -> body_bb. the + // entry block's branch is emitted THERE, at the very end: the + // cached-literal helpers append their initializing stores to + // entry_bb, and nothing may follow a terminator. + this.resolve_modules_bb = new llvm.BasicBlock("resolve_modules", ir_func); + this.toplevel_body_bb = body_bb; + this.toplevel_function = ir_func; + this.eir_toplevel_entry_bb = entry_bb; + + this.currentFunction = null; + if (insertBlock) ir.setInsertPoint(insertBlock); + return ir_func; + } + // an EIR-owned function: emit its EIR module (once) and fill this // function's body with a forwarding call. closure creation and env // plumbing stay entirely on the legacy side; the thunk just hands the @@ -1865,12 +1925,14 @@ class LLVMIRVisitor extends TreeVisitor { ); let i = 0; for (let el of n.elements) { - // don't create property stores for array holes - if (el == null) continue; - - let val = this.visit(el); - let index = { type: b.Literal, value: i }; - this.createPropertyStore(obj, index, val, true); + // don't create property stores for array holes — but the index + // still advances past them (an element after a hole used to + // land at the hole's index) + if (el != null) { + let val = this.visit(el); + let index = { type: b.Literal, value: i }; + this.createPropertyStore(obj, index, val, true); + } i = i + 1; } return obj; @@ -3587,8 +3649,13 @@ export function compile(tree, base_output_filename, source_filename, module_info if (excluded) { debug.log(1, `EIR: ${source_filename}: excluded via --ir-exclude`); } else { - let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info, options.ir_exclude_fn); - debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); + let toplevelLowered = false; + if (options.ir_toplevel) + toplevelLowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info); + if (!toplevelLowered) { + let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info, options.ir_exclude_fn); + debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); + } } } diff --git a/lib/eir/emit.js b/lib/eir/emit.js index a3d86a5d..d7deae1a 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -542,7 +542,9 @@ export class EIREmitter { case "make_closure": { let target = this.llvm_fns.get(inst.imms.fn); if (!target) throw new Error(`EIR emit: unknown closure target ${inst.imms.fn}`); - let name = this.v.getAtom(String(inst.imms.fn)); + let name = this.v.getAtom( + String(inst.imms.name !== undefined ? inst.imms.name : inst.imms.fn) + ); let rv = this.call( rt.make_closure, [this.val(inst.operands[0]), name, target], @@ -635,15 +637,31 @@ export class EIREmitter { case "make_array": { let elems = inst.operands.map((o) => this.val(o)); - let argv; - if (elems.length > 0) argv = this.spillArgs(elems); - else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); - return this.emitCallLike( - inst, - rt.array_new_copy, - [consts.int64(elems.length), argv], + if (inst.imms.indices === undefined) { + let argv; + if (elems.length > 0) argv = this.spillArgs(elems); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.emitCallLike( + inst, + rt.array_new_copy, + [consts.int64(elems.length), argv], + "arr" + ); + } + // an array literal with holes: force-filled allocation plus + // per-index stores for the non-holes (matching the legacy + // visitArrayExpression) + let arr = this.call( + rt.array_new, + [consts.int64(inst.imms.len), consts.bool(true)], "arr" ); + this.values.set(inst, arr); + for (let i = 0; i < elems.length; i++) { + let key = this.v.loadDoubleEjsValue(inst.imms.indices[i]); + this.call(rt.object_setprop, [arr, key, elems[i]], ""); + } + return arr; } case "array_from_spread": { // concatenate the operands (array chunks / iterables) into diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 91947c23..86a46d97 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -299,6 +299,51 @@ function candidateOf(wrapped) { return null; } +// toplevel-as-EIR (phase 3, --ir-toplevel): lower the WHOLE module — +// toplevel statements, import/export init, and every nested function — +// as one EIR unit. module-scope bindings resolve through the same refs +// machinery candidates use (slots for exported/promoted names, +// const-literal folds); everything else is an ordinary toplevel local, +// captured into the toplevel's environment as needed. all-or-nothing +// per module: any LowerNotSupported anywhere returns false and the +// caller falls back to per-candidate collection below. the legacy +// pipeline keeps only the module-resolution scaffolding, which wraps the +// EIR toplevel (see emitEIRToplevel in compiler.js). +export function collectEIRToplevel(tree, filename, module_infos, this_module_info) { + let toplevel = tree.body[0]; + let body = toplevel.body.body; + + let assigned = collectAssignedNames(body); + let refs = collectModuleRefs(body, module_infos, this_module_info); + addModuleConstLiterals(body, assigned, refs); + + let moduleSlotNames = new Set(refs.keys()); + + try { + let analysis = new ScopeAnalysis(); + let info = analysis.analyzeToplevel(toplevel, toplevel.id.name, moduleSlotNames); + + // no direct sibling calls in toplevel mode: a slot-backed module + // function may capture the toplevel environment, which a caller's + // envParam wouldn't carry. calls go slot-load + invoke_closure. + let mod_ctx = { refs: refs, siblings: new Map(), this_module_info: this_module_info }; + + let eir_module = new Module(filename); + lowerAnalyzedFunction(info, analysis, eir_module, mod_ctx); + verifyModule(eir_module); + + toplevel.eir_module = eir_module; + toplevel.eir_main = info.name; + toplevel.body = { type: b.BlockStatement, body: [], loc: toplevel.loc }; + debug.log(1, `EIR: ${filename}: whole module lowered (toplevel-as-EIR)`); + return true; + } catch (e) { + if (!isLowerNotSupported(e)) throw e; + debug.log(1, `EIR: ${filename}: toplevel falls back (${e.message})`); + return false; + } +} + // tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel // function). returns { lowered, fellback } counts. export function collectEIRFunctions(tree, filename, module_infos, this_module_info, exclude_fns) { diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 493a3c45..b0a3e046 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -63,11 +63,22 @@ const binops = { in: "in", }; +// the source-level name a closure should carry (Function.prototype.name): +// the function's own id, or "" for anonymous functions — never the +// scope-qualified EIR name +function displayNameOf(childInfo) { + return (childInfo.node.id && childInfo.node.id.name) || ""; +} + class LowerFunction { constructor(info, analysis, module, mod_ctx) { this.info = info; // FnInfo from scope analysis this.analysis = analysis; this.module = module; + // toplevel-as-EIR: this function IS the module toplevel; import/ + // export statements lower here, and slot-backed declarations store + // through module slots instead of local bindings + this.isToplevel = !!info.isToplevel; // module-scope interop: module-slot references (imports and this // module's exports: name -> {module, slot, constval?, writable}) // and sibling top-level EIR functions callable directly @@ -175,6 +186,7 @@ class LowerFunction { let childInfo = this.findChildFn(binding); let closure = this.b.emit("make_closure", [this.curEnv], { fn: childInfo.name, + name: displayNameOf(childInfo), }); this.writeBinding(binding, closure); } @@ -237,6 +249,24 @@ class LowerFunction { return this.descAtCreation(desc); } + // fresh per-iteration env for captured let/const declared in the loop + // BODY: emitted at the top of the body block each iteration. their + // declarations re-execute per pass, so nothing copies forward. + enterLoopBody(n) { + let ble = this.analysis.loopBodyEnvOf(n); + if (!ble) return null; + let outer = this.curEnvValue(); + let e = this.b.emit("make_env", [], { size: ble.envSize }); + this.b.emit("env_store", [e, outer], { slot: 0 }); + this.b.writeVariable(this.levar(ble), this.b.cur, e); + this.activeLoopEnvs.push(ble); + return ble; + } + + leaveLoopBody(ble) { + if (ble) this.activeLoopEnvs.pop(); + } + // the environment holding `binding`, from the current position envForBinding(binding) { let target = @@ -324,21 +354,59 @@ class LowerFunction { return v; } case b.ArrayExpression: { - let elems = n.elements.map((e) => - e ? this.expr(e) : this.b.constUndefined() - ); - return this.b.emit("make_array", elems, {}); + // holes must stay holes (forEach etc. skip them; undefined + // wouldn't be skipped). written with plain loops: the + // arrow-based form of this case miscompiled under the + // legacy pipeline (undistilled; see the phase-3 notes). + let holes = false; + for (let el of n.elements) if (!el) holes = true; + if (!holes) { + let elems = []; + for (let el of n.elements) elems.push(this.expr(el)); + return this.b.emit("make_array", elems, {}); + } + let vals = []; + let indices = []; + for (let i = 0; i < n.elements.length; i++) { + let el = n.elements[i]; + if (!el) continue; + vals.push(this.expr(el)); + indices.push(i); + } + return this.b.emit("make_array", vals, { + len: n.elements.length, + indices: indices, + }); } case b.ObjectExpression: { - let keys = []; - let values = []; + let hasComputed = n.properties.some( + (p) => p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal) + ); + if (!hasComputed) { + let keys = []; + let values = []; + for (let p of n.properties) { + keys.push(p.key.type === b.Identifier ? p.key.name : String(p.key.value)); + values.push(this.expr(p.value)); + } + return this.b.emit("make_object", values, { keys: keys }); + } + // computed keys: empty object + per-property stores in + // source order (key evaluates before value, per spec) + let obj = this.b.emit("make_object", [], { keys: [] }); for (let p of n.properties) { - if (p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal)) - throw LowerNotSupported("computed object key", n.loc); - keys.push(p.key.type === b.Identifier ? p.key.name : String(p.key.value)); - values.push(this.expr(p.value)); + if (!p.computed && (p.key.type === b.Identifier || p.key.type === b.Literal)) { + let v = this.expr(p.value); + this.b.emit("set_prop_atom", [obj, v], { + atom: p.key.type === b.Identifier ? p.key.name : String(p.key.value), + }); + } else { + let k = this.expr(p.key); + let v = this.expr(p.value); + this.b.emit("set_prop", [obj, k, v], {}); + } } - return this.b.emit("make_object", values, { keys: keys }); + return obj; } default: throw LowerNotSupported(`expression type ${n.type}`, n.loc); @@ -405,7 +473,10 @@ class LowerFunction { lowerOneFunction(childInfo, this.analysis, this.module, this.mod_ctx); // capture the innermost env: the current iteration's loop env when // inside a for-let loop, else the function env / incoming env - return this.b.emit("make_closure", [this.curEnvValue()], { fn: childInfo.name }); + return this.b.emit("make_closure", [this.curEnvValue()], { + fn: childInfo.name, + name: displayNameOf(childInfo), + }); } binary(n) { @@ -476,6 +547,31 @@ class LowerFunction { } } + // the one-time declaration store for a slot-backed toplevel binding: + // unlike writeIdentifier this may store to read-only refs (an exported + // const's initializer is a legitimate store) + writeModuleSlotInit(idNode, value) { + let ref = this.mod_ctx.refs.get(idNode.name); + if (!ref || ref.module === undefined || ref.slot === undefined || ref.slot < 0) + throw LowerNotSupported( + `toplevel declaration of '${idNode.name}' has no slot`, + idNode.loc + ); + this.b.emit("module_slot_store", [value], { module: ref.module, slot: ref.slot }); + } + + // store `value` into this module's export slot named `exportName` + storeExportSlot(exportName, value, loc) { + let tmi = this.mod_ctx.this_module_info; + let export_info = tmi && tmi.exports.get(exportName); + if (!export_info) + throw LowerNotSupported(`no export slot for '${exportName}'`, loc); + this.b.emit("module_slot_store", [value], { + module: "%self", + slot: export_info.slot_num, + }); + } + // store `value` into the identifier `idNode` (local binding, writable // module slot, or global) writeIdentifier(idNode, value) { @@ -764,6 +860,17 @@ class LowerFunction { if (d.id.type !== b.Identifier) throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); let binding = this.analysis.resolve(d.id); + if (!binding && this.isToplevel) { + // a slot-backed module declarator (analyzeToplevel + // declared no local): store the initializer through + // the slot. const-literal folds have no storage — + // their (literal) initializer is dropped. + let ref = this.mod_ctx.refs.get(d.id.name); + if (ref && ref.module === null) continue; + let v = d.init ? this.expr(d.init) : this.b.constUndefined(); + this.writeModuleSlotInit(d.id, v); + continue; + } // visible-as-undefined during its own initializer: a // direct self-reference reads undefined, and a closure // in the init captures the (env) binding the real value @@ -774,10 +881,51 @@ class LowerFunction { this.writeBinding(binding, init); } return; - case b.FunctionDeclaration: + case b.FunctionDeclaration: { + let binding = this.analysis.resolve(n.id); + if (!binding && this.isToplevel) { + // a slot-backed module function: lower it, then store + // its closure to the slot at this statement's source + // position (same hoisting caveat as the legacy + // %moduleSetSlot rewrite) + let childInfo = this.analysis.infoFor(n); + lowerOneFunction(childInfo, this.analysis, this.module, this.mod_ctx); + let closure = this.b.emit("make_closure", [this.curEnvValue()], { + fn: childInfo.name, + name: displayNameOf(childInfo), + }); + this.writeModuleSlotInit(n.id, closure); + return; + } // closure was created (hoisted) at entry; lower the body now lowerOneFunction(this.analysis.infoFor(n), this.analysis, this.module, this.mod_ctx); return; + } + case b.ImportDeclaration: + if (!this.isToplevel) throw LowerNotSupported("import declaration", n.loc); + // module resolution happens in the toplevel scaffolding; + // a bare `import "m"` also touches the module object for + // parity with the legacy %moduleGetExotic rewrite + if (n.specifiers.length === 0) + this.b.emit("module_get_exotic", [], { module: n.source_path.value }); + return; + case b.ExportNamedDeclaration: { + if (!this.isToplevel) throw LowerNotSupported("export declaration", n.loc); + if (n.declaration && !Array.isArray(n.declaration)) return this.stmt(n.declaration); + // export { A, B as C }: copy the locals' current values + // into the exported slots at this statement's position + for (let spec of n.specifiers) { + let v = this.identifier(spec.local); + this.storeExportSlot(spec.exported.name, v, n.loc); + } + return; + } + case b.ExportDefaultDeclaration: { + if (!this.isToplevel) throw LowerNotSupported("export default", n.loc); + let v = this.expr(n.declaration); + this.storeExportSlot("default", v, n.loc); + return; + } case b.ExpressionStatement: this.expr(n.expression); return; @@ -878,7 +1026,9 @@ class LowerFunction { this.breakTargets.push(exit); this.continueTargets.push(header); this.b.setInsertPoint(body); + let ble = this.enterLoopBody(n); this.stmt(n.body); + this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(header, []); this.breakTargets.pop(); this.continueTargets.pop(); @@ -898,7 +1048,9 @@ class LowerFunction { this.breakTargets.push(exit); this.continueTargets.push(cond_bb); this.b.setInsertPoint(body); + let ble = this.enterLoopBody(n); this.stmt(n.body); + this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(cond_bb, []); this.breakTargets.pop(); this.continueTargets.pop(); @@ -954,7 +1106,9 @@ class LowerFunction { this.breakTargets.push(exit); this.continueTargets.push(update); this.b.setInsertPoint(body); + let ble = this.enterLoopBody(n); this.stmt(n.body); + this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(update, []); this.breakTargets.pop(); this.continueTargets.pop(); @@ -1063,9 +1217,11 @@ class LowerFunction { } else { this.writeIdentifier(n.left, v); } + let ble = this.enterLoopBody(n); this.breakTargets.push(exit); this.continueTargets.push(header); this.stmt(n.body); + this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(header, []); this.breakTargets.pop(); this.continueTargets.pop(); @@ -1120,9 +1276,11 @@ class LowerFunction { } else { this.writeIdentifier(n.left, v); } + let ble = this.enterLoopBody(n); this.breakTargets.push(exit); this.continueTargets.push(header); this.stmt(n.body); + this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(header, []); this.breakTargets.pop(); this.continueTargets.pop(); diff --git a/lib/eir/ops.js b/lib/eir/ops.js index f9b0cde3..effb8b05 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -82,7 +82,10 @@ export const OPS = { make_env: { arity: -1, effects: E.GC, imms: ["size"] }, env_load: { arity: 1, effects: E.READ, imms: ["slot"] }, env_store: { arity: 2, effects: E.WRITE, imms: ["slot"] }, - make_closure: { arity: 1, effects: E.GC, imms: ["fn"] }, + // imms.fn = the EIR function to target; imms.name = the source-level + // display name (Function.prototype.name) — the internal fn name is + // scope-qualified and must not leak + make_closure: { arity: 1, effects: E.GC, imms: ["fn", "name"] }, // --- modules ------------------------------------------------------------- module_slot_load: { arity: 0, effects: E.READ, imms: ["module", "slot"] }, @@ -110,7 +113,10 @@ export const OPS = { new_target: { arity: 0, effects: E.NONE }, // --- allocation ------------------------------------------------------------ - make_array: { arity: -1, effects: E.GC | E.WRITE }, + // dense: operands are the elements in order (no imms). with holes: + // imms.len = total length, imms.indices[i] = the array index operand i + // lands at — holes stay holes (array_new force-fills, stores skip). + make_array: { arity: -1, effects: E.GC | E.WRITE, imms: ["len", "indices"] }, // %arrayFromSpread: concatenate the operands (each an array literal // chunk or an arbitrary iterable) into one fresh array. iterating can // reenter user JS, hence GENERIC_OP. diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 9f5675c2..8d048ed8 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -135,18 +135,38 @@ export class ScopeAnalysis { // fresh env per iteration. this.loopEnvs = []; this.loopEnvStack = []; // active candidates (innermost last) - this.loopEnvByNode = new Map(); // loop AST node -> LoopEnv + this.loopEnvByNode = new Map(); // loop AST node -> head LoopEnv + this.bodyEnvByNode = new Map(); // loop AST node -> body LoopEnv // set around a for-init declaration walk so the declared bindings // attach to the loop's env candidate this.pendingLoopEnv = null; + // toplevel-as-EIR mode (analyzeToplevel): module-scope names backed + // by module slots (or const-literal folds). declarations of these + // at the root function's top level create NO local binding — every + // reference resolves as free and the integration's refs machinery + // routes it through the slot. + this.moduleSlotNames = null; + this.rootInfo = null; + // every EIR function name handed out by enterFunction (scope + // qualification alone isn't unique). NOTE: initialized HERE, not + // lazily at first use — the lazy-init + template-literal form of + // this code miscompiled under the legacy pipeline (undistilled; + // see the phase-3 notes). + this.usedFnNames = new Set(); } - // the loop's materialized env, or null (for lowering) + // the loop's materialized head env, or null (for lowering) loopEnvOf(node) { let le = this.loopEnvByNode.get(node); return le && le.materialized ? le : null; } + // the loop's materialized body env, or null (for lowering) + loopBodyEnvOf(node) { + let le = this.bodyEnvByNode.get(node); + return le && le.materialized ? le : null; + } + resolve(node) { return this.refs.get(node); } @@ -187,6 +207,26 @@ export class ScopeAnalysis { else this.walkExpr(fnNode.body); // expression-bodied arrow this.leaveFunction(); if (selfBinding) this.curScope = this.curScope.parent; + this.finishAnalysis(info); + return info; + } + + // toplevel-as-EIR: analyze the whole module toplevel function. module + // bindings named in moduleSlotNames get no local binding (their + // declarations lower as slot stores, their references as slot loads); + // everything else is an ordinary toplevel local. + analyzeToplevel(fnNode, name, moduleSlotNames) { + this.moduleSlotNames = moduleSlotNames; + let info = this.enterFunction(fnNode, name); + info.isToplevel = true; + this.rootInfo = info; + this.walkFnBody(fnNode.body); + this.leaveFunction(); + this.finishAnalysis(info); + return info; + } + + finishAnalysis(info) { // materialize the loop envs whose bindings are captured; their // bindings get loop-env slots (from 1; slot 0 is the parent env) // and are excluded from function-env slot assignment below. @@ -200,11 +240,31 @@ export class ScopeAnalysis { le.envSize = next; } assignSlots(info); - return info; + } + + // is a declaration of `name`, landing in `scope`, backed by a module + // slot (or const-literal fold) instead of a local binding? + slotBackedDecl(name, scope) { + return ( + this.moduleSlotNames !== null && + this.curFn === this.rootInfo && + scope.isFnTop && + this.moduleSlotNames.has(name) + ); } enterFunction(fnNode, name) { let fname = name || (fnNode.id && fnNode.id.name) || "anon"; + // scope-qualified names aren't unique on their own (an object + // method `replace` and a toplevel function `replace` both qualify + // to `.replace`); every EIR function in a module needs a + // distinct symbol + if (this.usedFnNames.has(fname)) { + let i = 2; + while (this.usedFnNames.has(fname + "~" + i)) i++; + fname = fname + "~" + i; + } + this.usedFnNames.add(fname); let info = new FnInfo(fnNode, fname, this.curFn); this.fnInfos.set(fnNode, info); @@ -271,6 +331,30 @@ export class ScopeAnalysis { return le; } + // the BODY env of a loop: captured let/const declared anywhere in the + // loop body (at any block depth, in the same function) get a fresh + // environment per iteration — their declarations re-execute each pass, + // so no value copies forward (unlike for-head vars). pushed around the + // body walk of every loop form. + pushLoopBodyEnv(node) { + let top = this.loopEnvStack[this.loopEnvStack.length - 1]; + let parentCandidate = top && top.fnInfo === this.curFn ? top : null; + let le = new LoopEnv(this.curFn, node, parentCandidate); + this.loopEnvs.push(le); + this.bodyEnvByNode.set(node, le); + this.loopEnvStack.push(le); + return le; + } + + // a let/const declaration inside a loop body attaches to that loop's + // body env (top of stack, same function) + attachBodyLet(binding) { + let top = this.loopEnvStack[this.loopEnvStack.length - 1]; + if (!top || top.fnInfo !== this.curFn) return; + binding.loopEnv = top; + top.allBindings.push(binding); + } + reference(idNode, isCallee) { if (idNode.name === "undefined") { this.refs.set(idNode, null); @@ -378,11 +462,21 @@ export class ScopeAnalysis { if (n.kind === "var") { while (!scope.isFnTop) scope = scope.parent; } + if (this.slotBackedDecl(d.id.name, scope)) { + // toplevel module binding: no local; the declarator + // lowers as a slot store, references via refs + if (d.init) this.walkExpr(d.init); + continue; + } let binding = scope.declare(d.id.name, "local"); this.refs.set(d.id, binding); if (ple) { binding.loopEnv = ple; ple.allBindings.push(binding); + } else if (n.kind !== "var") { + // a let/const inside a loop body: fresh binding per + // iteration if captured + this.attachBodyLet(binding); } if (d.init) this.walkExpr(d.init); } @@ -392,6 +486,17 @@ export class ScopeAnalysis { if (!n.id) throw LowerNotSupported("unnamed function declaration", n.loc); if (!this.curScope.isFnTop) throw LowerNotSupported("block-level function declaration", n.loc); + if (this.slotBackedDecl(n.id.name, this.curScope)) { + // toplevel module function: no local binding — the + // closure is stored to its slot at this statement's + // position, and every reference (self-references + // included) reads the slot + let fname = `${this.curFn.name}.${n.id.name}`; + this.enterFunction(n, fname); + this.walkFnBody(n.body); + this.leaveFunction(); + return; + } if (this.curScope.names.has(n.id.name)) throw LowerNotSupported( `redeclaration of function '${n.id.name}'`, @@ -405,6 +510,48 @@ export class ScopeAnalysis { this.leaveFunction(); return; } + case b.ImportDeclaration: { + // toplevel mode only: scaffolding resolves the imported + // module; binding reads route through refs. a specifier + // whose local name has no slot backing (a native module's + // named import) keeps the module on the legacy path. + if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) + throw LowerNotSupported("import declaration", n.loc); + for (let spec of n.specifiers) { + let local = spec.local || spec.id; + if (!local || !this.moduleSlotNames.has(local.name)) + throw LowerNotSupported( + `import binding '${local && local.name}' has no slot`, + n.loc + ); + } + return; + } + case b.ExportNamedDeclaration: { + if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) + throw LowerNotSupported("export declaration", n.loc); + if (n.source) throw LowerNotSupported("re-export", n.loc); + if (n.declaration && !Array.isArray(n.declaration)) + return this.walkStmt(n.declaration); + if (n.specifiers && n.specifiers.length > 0) { + for (let spec of n.specifiers) this.walkExpr(spec.local); + return; + } + throw LowerNotSupported("export declaration form", n.loc); + } + case b.ExportDefaultDeclaration: { + if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) + throw LowerNotSupported("export default", n.loc); + if ( + n.declaration.type === b.FunctionDeclaration || + n.declaration.type === b.ClassDeclaration + ) + throw LowerNotSupported("export default declaration", n.loc); + this.walkExpr(n.declaration); + return; + } + case b.ExportAllDeclaration: + throw LowerNotSupported("export *", n.loc); case b.ExpressionStatement: this.walkExpr(n.expression); return; @@ -413,14 +560,20 @@ export class ScopeAnalysis { this.walkStmt(n.consequent); if (n.alternate) this.walkStmt(n.alternate); return; - case b.WhileStatement: + case b.WhileStatement: { this.walkExpr(n.test); + this.pushLoopBodyEnv(n); this.walkStmt(n.body); + this.loopEnvStack.pop(); return; - case b.DoWhileStatement: + } + case b.DoWhileStatement: { + this.pushLoopBodyEnv(n); this.walkStmt(n.body); + this.loopEnvStack.pop(); this.walkExpr(n.test); return; + } case b.ForStatement: { this.curScope = new LexScope(this.curScope, this.curFn); let le = null; @@ -439,7 +592,9 @@ export class ScopeAnalysis { } if (n.test) this.walkExpr(n.test); if (n.update) this.walkExpr(n.update); + this.pushLoopBodyEnv(n); this.walkStmt(n.body); + this.loopEnvStack.pop(); if (le) this.loopEnvStack.pop(); this.curScope = this.curScope.parent; return; @@ -474,7 +629,9 @@ export class ScopeAnalysis { throw LowerNotSupported(`for-of/for-in target ${n.left.type}`, n.loc); } this.walkExpr(n.right); + this.pushLoopBodyEnv(n); this.walkStmt(n.body); + this.loopEnvStack.pop(); if (le) this.loopEnvStack.pop(); this.curScope = this.curScope.parent; return; @@ -697,6 +854,11 @@ export class ScopeAnalysis { return; case b.ObjectExpression: for (let p of n.properties) { + // accessor properties don't fit make_object's plain + // key/value shape — lowering one as an ordinary + // property would silently misbehave + if (p.kind && p.kind !== "init") + throw LowerNotSupported(`object literal ${p.kind}ter`, n.loc); if (p.computed) this.walkExpr(p.key); this.walkExpr(p.value); } diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 2ddb09a6..a306dcfc 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -528,6 +528,40 @@ test("lower: toplevel-arrow candidates using this still fall back", () => { assert(threw, "expected LowerNotSupported"); }); +test("lower: captured body-block let gets a per-iteration env", () => { + let { module, fn } = lowerOne( + "function f(n) { let fns = []; for (var i = 0; i < n; i++) { let j = i; fns.push(function () { return j; }); } return fns; }" + ); + verifyModule(module); + let body = findBlock(fn, "for_body"); + assert( + body.insts.some((i) => i.op === "make_env"), + "loop body should make a fresh env each iteration" + ); +}); + +test("lower: array holes stay holes", () => { + let { fn } = lowerOne("function f() { return [, , 3]; }"); + let printed = printFunction(fn); + assertContains(printed, "len=3"); +}); + +test("lower: closures carry source-level display names", () => { + let { fn } = lowerOne("function f() { return function inner() {}; }"); + assertContains(printFunction(fn), 'name="inner"'); +}); + +test("scopes: same-named functions get distinct EIR names", () => { + let r = lowerFunctionNode( + parseFn( + "function f() { function g() {} let o = { m: function g() {} }; return o.m || g; }" + ) + ); + verifyModule(r.module); + let names = r.module.functions.map((x) => x.name); + assert(new Set(names).size === names.length, `duplicate names: ${names}`); +}); + test("lower: generator function lowers via make_generator/generator_yield", () => { let r = lowerFunctionNode( parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") diff --git a/lib/passes/desugar-destructuring.js b/lib/passes/desugar-destructuring.js index 7feac205..e8146213 100644 --- a/lib/passes/desugar-destructuring.js +++ b/lib/passes/desugar-destructuring.js @@ -177,7 +177,16 @@ export class DesugarDestructuring extends TransformPass { } } - n.body.body = new_decls.concat(n.body.body); + // expression-bodied arrows have no statement list: writing + // n.body.body here used to clobber the body of `() => () => ...` + // (the inner arrow's body field) with [undefined]. wrap in a + // block only when there are decls to prepend. + if (n.body.type === b.BlockStatement) { + n.body.body = new_decls.concat(n.body.body); + } else if (new_decls.length > 0) { + n.body = b.blockStatement(new_decls.concat([b.returnStatement(n.body)])); + n.expression = false; + } n.params = new_params; n.body = this.visit(n.body); return n; diff --git a/test/eir-toplevel1.js b/test/eir-toplevel1.js new file mode 100644 index 00000000..8c4a8362 --- /dev/null +++ b/test/eir-toplevel1.js @@ -0,0 +1,34 @@ +// generator: babel-node + +// whole-module (toplevel-as-EIR) shapes: toplevel statements, captured +// toplevel locals, loop envs at toplevel, imports and exports. runs and +// must agree under --ir, --ir --ir-toplevel, and the legacy pipeline. + +import dflt, { K, inc, peek, counter } from "./eir-toplevel1/lib1"; +import * as lib from "./eir-toplevel1/lib1"; +import "./eir-toplevel1/lib1"; + +let greeting = "hello"; +var count = 0; +function bump(n) { count += n; return count; } +console.log(greeting.length); +console.log(bump(2) + "," + bump(3)); + +let fns = []; +for (let i = 0; i < 3; i++) fns.push(function () { return i; }); +console.log(fns.map(function (g) { return g(); }).join(",")); + +let holes = [, , "x"]; +let seen = 0; +holes.forEach(function () { seen++; }); +console.log(seen + "/" + holes.length + "/" + holes[2]); + +console.log(K); +console.log(inc(2) + "," + inc(3)); +console.log(peek()); +console.log(lib.K + "/" + lib.peek()); +console.log(dflt); +console.log(typeof bump === "function" ? bump.name : "?"); +let local = K * 2; +export { local as doubled }; +console.log(local); diff --git a/test/eir-toplevel1/lib1.js b/test/eir-toplevel1/lib1.js new file mode 100644 index 00000000..b7bdde45 --- /dev/null +++ b/test/eir-toplevel1/lib1.js @@ -0,0 +1,6 @@ +export const K = 7; +export let counter = 0; +export function inc(n) { counter += n; return counter; } +let hidden = "h"; +export function peek() { return hidden + K; } +export default "DFLT"; diff --git a/test/expected/eir-toplevel1.js.expected-out b/test/expected/eir-toplevel1.js.expected-out new file mode 100644 index 00000000..5d03f700 --- /dev/null +++ b/test/expected/eir-toplevel1.js.expected-out @@ -0,0 +1,11 @@ +5 +2,5 +0,1,2 +1/3/x +7 +2,5 +h7 +7/h7 +DFLT +bump +14 From acf4beb1e3a5233822cc53a39e211ce75ac2681d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 23:16:27 -0700 Subject: [PATCH 038/146] eir: --dump-after; `--dump-after eir` prints the lowered EIR module --debug-after is renamed --dump-after (the old name stays as a deprecated alias). The pass-name argument works as before for AST dumps; the special name `eir` prints every lowered-and-verified EIR module through the printer, in both candidate mode and toplevel-as-EIR mode. collectEIRFunctions/collectEIRToplevel now take the options object (ir_exclude_fn rides in it instead of a positional). Validated: test-eir, test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3. Co-Authored-By: Claude Fable 5 --- ejs-es6.js | 7 ++++++- lib/compiler.js | 4 ++-- lib/eir/integrate.js | 22 +++++++++++++++++++--- 3 files changed, 27 insertions(+), 6 deletions(-) diff --git a/ejs-es6.js b/ejs-es6.js index c278aed9..6937bb6c 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -220,10 +220,15 @@ let args = { handlerArgc: 0, help: "debug output. more instances of this flag increase the amount of spew.", }, + "--dump-after": { + handler: add_debug_after_pass, + handlerArgc: 1, + help: "dump the AST after the named pass; `--dump-after eir` dumps the lowered EIR module(s)", + }, "--debug-after": { handler: add_debug_after_pass, handlerArgc: 1, - help: "dump the IR tree after the named pass", + help: "deprecated alias for --dump-after", }, "-o": { option: "output_filename", diff --git a/lib/compiler.js b/lib/compiler.js index 5027c905..de0f61f4 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -3651,9 +3651,9 @@ export function compile(tree, base_output_filename, source_filename, module_info } else { let toplevelLowered = false; if (options.ir_toplevel) - toplevelLowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info); + toplevelLowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); if (!toplevelLowered) { - let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info, options.ir_exclude_fn); + let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info, options); debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); } } diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index 86a46d97..f2547ab2 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -39,6 +39,17 @@ import { lowerAnalyzedFunction } from "./lower"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; import { Module } from "./ir"; import { verifyModule } from "./verifier"; +import { printModule } from "./printer"; + +// --dump-after eir: print the lowered (verified) EIR module +function dumpRequested(options) { + return options && options.debug_passes && options.debug_passes.has("eir"); +} + +function dumpModule(filename, mode, eir_module) { + console.log(`// EIR module for ${filename} (${mode})`); + console.log(printModule(eir_module)); +} function collectPatternNames(pat, out) { if (!pat) return; @@ -309,7 +320,7 @@ function candidateOf(wrapped) { // caller falls back to per-candidate collection below. the legacy // pipeline keeps only the module-resolution scaffolding, which wraps the // EIR toplevel (see emitEIRToplevel in compiler.js). -export function collectEIRToplevel(tree, filename, module_infos, this_module_info) { +export function collectEIRToplevel(tree, filename, module_infos, this_module_info, options) { let toplevel = tree.body[0]; let body = toplevel.body.body; @@ -336,6 +347,7 @@ export function collectEIRToplevel(tree, filename, module_infos, this_module_inf toplevel.eir_main = info.name; toplevel.body = { type: b.BlockStatement, body: [], loc: toplevel.loc }; debug.log(1, `EIR: ${filename}: whole module lowered (toplevel-as-EIR)`); + if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); return true; } catch (e) { if (!isLowerNotSupported(e)) throw e; @@ -346,7 +358,8 @@ export function collectEIRToplevel(tree, filename, module_infos, this_module_inf // tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel // function). returns { lowered, fellback } counts. -export function collectEIRFunctions(tree, filename, module_infos, this_module_info, exclude_fns) { +export function collectEIRFunctions(tree, filename, module_infos, this_module_info, options) { + let exclude_fns = options && options.ir_exclude_fn; let toplevel = tree.body[0]; let body = toplevel.body.body; @@ -456,7 +469,10 @@ export function collectEIRFunctions(tree, filename, module_infos, this_module_in } } - if (succeeded.length > 0) verifyModule(eir_module); + if (succeeded.length > 0) { + verifyModule(eir_module); + if (dumpRequested(options)) dumpModule(filename, "candidate functions", eir_module); + } // only now (everything lowered + verified) tag nodes and empty bodies for (let entry of succeeded) { From 324a0f86a1346e0abc78442022433c645cebfc9b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 9 Jul 2026 23:32:51 -0700 Subject: [PATCH 039/146] =?UTF-8?q?docs:=20plans.md=20=E2=80=94=20legacy-p?= =?UTF-8?q?ipeline=20removal,=20optimizations,=20TypeScript?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The living roadmap: the four-step legacy kill (phases 1-2 done, toplevel-as-EIR in progress, default flip last), the post-SSA optimization phase (escape analysis + allocation sinking so readable overallocating idioms become zero-cost), the JS-to-TypeScript compiler conversion (and the tentative TS-as-input idea), native-module linking plans, and CI growth. Co-Authored-By: Claude Fable 5 --- docs/plans.md | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 docs/plans.md diff --git a/docs/plans.md b/docs/plans.md new file mode 100644 index 00000000..b7c4ec26 --- /dev/null +++ b/docs/plans.md @@ -0,0 +1,100 @@ +# echojs — planned work + +A living document; ordering within a section is roughly priority. See +`EIRProposal.md` for the IR design itself. + +## Kill the legacy pipeline (in progress) + +EIR (the block-argument SSA middle-end in `lib/eir/`) replaces the +AST+intrinsics pipeline (new-cc, LambdaLift, the statement/expression +half of LLVMIRVisitor). The plan, most of which has landed: + +1. **Close the per-function gaps** — done. The self-hosted compiler + lowers 424/424 candidate functions with zero fallbacks (try/finally, + per-iteration loop environments, arrow lexical `this`, `arguments`, + rest/default params, for-in, spread, and friends). +2. **Desugars run pre-EIR** — done. Classes, destructuring, generators + (coroutine-style), spread, meta-properties and function-declaration + hoisting are pipeline-agnostic AST→AST passes that run before EIR + collection; EIR lowers their `%`-intrinsics via the table in + `lib/eir/intrinsics.js`. Defaults/rest deliberately stay legacy-only: + EIR's native handling is strictly better, and the passes die with the + legacy pipeline. +3. **Toplevel-as-EIR** (`--ir-toplevel`, in progress) — whole modules + (toplevel statements, import/export init, every nested function) + lower as one EIR unit; the legacy side keeps only module scaffolding. + The full test suite passes under the flag, and the compiler + self-compiles with all 60 of its modules lowering whole. Open: the + toplevel-built compiler must itself bootstrap (currently red in + `--ir` mode), and the remaining per-module fallbacks — labeled + statements, object-literal accessors, tagged templates, + new-with-spread — become native EIR features. Fallback then becomes + a compile error and the forwarding thunks die. +4. **Flip the default** — `--ir` becomes the pipeline, `--legacy` sticks + around for one release, then new-cc/lambda-lift and the visitor + middle-end (~7k lines) are deleted. LLVMIRVisitor keeps only the + module scaffolding the EIR emitter borrows (module info/resolution, + accessors, atom and literal infrastructure). + +A pleasant side effect so far: the EIR work has surfaced 21 latent +compiler and runtime bugs, most with regression tests. + +## Optimization phase (after the legacy kill) + +Now that the IR is SSA with a declared effect table (`lib/eir/ops.js`), +a real optimizer becomes tractable. The guiding goal: **readable JS +idioms that overallocate should become zero-cost when semantics are +preserved** — destructuring returns, options objects, tuple-ish arrays. + +- **Escape analysis + allocation sinking** — the big one. One analysis + over the SSA graph (escaping positions: call/construct operands, + `set_prop` values, returns/throws, module-slot stores; direct calls + give cheap interprocedural edges), then sink in payoff order: + 1. `make_env` — every closure-bearing function allocates one, and + per-iteration loop envs multiply that in hot loops; non-escaping + closure environments scalar-replace into SSA values. + 2. `make_object`/`make_array` + own-key `get_prop_atom` folding — + exactly the shape the destructuring desugar emits. + 3. A peephole recognizing the iterator-wrapper-over-array-literal + pattern, rewriting to direct indexing so array patterns sink too. + 4. `rest_args`/`args_obj` when only indexed or `.length`'d. +- The usual SSA passes ride along cheaply once the framework exists: + constant/copy propagation, DCE, redundant `to_boolean`/`typeof` + elimination, direct-call devirtualization beyond siblings. +- A type lattice over the currently untyped (`any`) values, feeding the + low-tier ops (`has_tag`/`unbox_f64`/`f64_*`) for unboxed arithmetic. +- **MAAM abstract-interpreter integration**: hook EIR up to the + MAAM-based abstract interpreter being developed alongside this repo. + It supplies types — including object shapes — which both seeds the + type lattice above and strengthens allocation sinking (shape + information makes own-key folding and escape reasoning sound in far + more cases). The `ops.js` effect table is the declared contract for + this consumer. + +## TypeScript + +1. **The compiler converts from JS to TypeScript.** Sequenced after the + legacy pipeline is gone, remaining bugs are fixed, and test coverage + grows (dedicated CI steps). Until then, avoid JS-idiom churn that a + TS port would redo. The babel step in `//lib:generated` becomes tsc. +2. **TypeScript as compiler input — tentative.** Would slot in at the + parser layer (type-stripping or a parser swap). If it happens, TS + type annotations are a natural seed for the EIR type lattice above. + +## Modules and linking + +Static linking remains the regime (no dynamic loading planned). + +- **Reusable native modules from JS**: a driver mode that compiles a + module to a `.a` plus a generated `.ejs` manifest — exports in slot + order as the ABI, stably-named init function — so consumers link + against compiled modules without recompiling them. +- **IR in the manifest**: serialize the module's EIR into the manifest + so cross-module static analysis and inlining through module + boundaries work before (and instead of) any dynamic-loading story. + +## Testing / CI + +- Dedicated CI steps for the `--ir-toplevel` configuration (the + buck-stage machinery already takes extra flags). +- Broader coverage generally, as a prerequisite for the TS port. From afec6e9cba8edc6489cd83b1e3aedc8339d44afd Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 01:01:59 -0700 Subject: [PATCH 040/146] eir: HoistFuncDecls pre-EIR; fix fn-scope forward references MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit HoistFuncDecls joins the pre-EIR list (last — nothing after it emits function declarations). Its v8 semantics — block-level declarations hoist to function scope, same-name redeclarations collapse to the last one — used to be per-function EIR fallbacks; at the toplevel the hoist also moves function slot stores to the top, where hoisting says they belong (retiring the source-position caveat). The hoist exposed two latent scoping bugs, both fixed: - The scope walk declared fn-top let/const/function bindings at their statement, in order, so a function placed ABOVE a binding it captures resolved the name as a global (hello3, closure3, eir-generator1 — silently wrong for source-order forward references all along, e.g. `function f() { use(d); } let d = 6;`). walkFnBody now runs a hoisting prescan that declares all function-scope names first — including `var`s nested in other statements, which hoist too — aborting to fallback on declaration patterns rather than silently skipping them (they're pre-desugared; skipping would reintroduce the misresolution for that shape). - collectModuleScopeNames missed `var`s nested inside toplevel statements (`if (c) var print = console.log;` binds `print` at module scope, not as a global), so a candidate referencing one lowered it as a global load (function-overriding2). The scan now recurses through statements, stopping at function boundaries. Fallback categories closed: block-level function declarations, function redeclaration. Validated: test-eir, test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, full suite green under --ir --ir-toplevel (393 pass). Co-Authored-By: Claude Fable 5 --- lib/closure-conversion.js | 8 +++- lib/eir/integrate.js | 31 +++++++++++++++ lib/eir/scopes.js | 82 ++++++++++++++++++++++++++++++++++++--- 3 files changed, 115 insertions(+), 6 deletions(-) diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index f2ed8d11..6d312747 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -67,12 +67,19 @@ const enable_hoist_func_decls_pass = true; // topScope), where EIR's rest_args op is a branch-free select. Both // passes serve only the legacy pipeline (fallback functions and the // toplevel) and die with it in phase 4 rather than hoisting. +// HoistFuncDecls hoists last: nothing after it (spread/meta emit no +// function declarations) re-creates block-level decls. it gives v8 +// semantics — block-level declarations hoist to function scope, and +// same-name redeclarations collapse to the last one — which used to be +// per-function fallbacks in EIR; at the toplevel it also moves the +// closure slot stores to the top, where hoisting says they belong. const pre_eir_passes = [ DesugarClasses, DesugarDestructuring, DesugarGeneratorFunctions, DesugarSpread, DesugarMetaProperties, + enable_hoist_func_decls_pass ? HoistFuncDecls : null, ]; const passes = [ @@ -89,7 +96,6 @@ const passes = [ // has to run before DesugarDefaults, which assumes simple params. DesugarDestructuring, DesugarSpread, - enable_hoist_func_decls_pass ? HoistFuncDecls : null, FuncDeclsToVars, DesugarLetLoopVars, HoistVars, diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index f2547ab2..c94d459e 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -78,6 +78,34 @@ function unwrapExport(stmt) { return stmt; } +// `var` declarations hoist to module scope from ANY statement depth +// (`if (c) var print = console.log;` binds `print` at module scope, not +// as a global). walk statements recursively — but not into nested +// functions, whose vars are their own. +function collectNestedVarNames(n, names) { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (let el of n) collectNestedVarNames(el, names); + return; + } + switch (n.type) { + case b.FunctionDeclaration: + case b.FunctionExpression: + case b.ArrowFunctionExpression: + return; // function boundary + case b.VariableDeclaration: + if (n.kind === "var") + for (let d of n.declarations) collectPatternNames(d.id, names); + return; + default: + for (let k of Object.keys(n)) { + if (k === "loc") continue; + collectNestedVarNames(n[k], names); + } + return; + } +} + // names bound at module scope (anything that is NOT a real global) function collectModuleScopeNames(toplevelBody) { let names = new Set(); @@ -98,6 +126,9 @@ function collectModuleScopeNames(toplevelBody) { } break; default: + // hoisted vars inside nested statements still bind at + // module scope + collectNestedVarNames(stmt, names); break; } } diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 8d048ed8..f42af1c6 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -182,9 +182,82 @@ export class ScopeAnalysis { // otherwise every body-level function declaration would look like a // block-level one. walkFnBody(body) { + // hoisting, pass 1: function-scope declarations are visible from + // the top of the function regardless of statement order (function + // declarations hoist, and echojs's no-TDZ let/const read as + // undefined before their statement). without this, a nested + // function placed ABOVE a let/const it captures — which the + // pre-EIR HoistFuncDecls pass produces routinely — resolved the + // name as a global. + for (let s of body.body) { + let stmt = s; + if ( + stmt.type === b.ExportNamedDeclaration && + stmt.declaration && + !Array.isArray(stmt.declaration) + ) + stmt = stmt.declaration; + if (stmt.type === b.VariableDeclaration) { + for (let d of stmt.declarations) { + // patterns are pre-desugared (DesugarDestructuring runs + // before HoistFuncDecls); if one reaches us anyway, + // fall back rather than silently skip its targets — + // they'd misresolve as globals from any hoisted + // function above the declaration + if (d.id.type !== b.Identifier) + throw LowerNotSupported( + `fn-top declaration pattern ${d.id.type}`, + stmt.loc + ); + if (this.slotBackedDecl(d.id.name, this.curScope)) continue; + this.curScope.declare(d.id.name, "local"); + } + } else if (stmt.type === b.FunctionDeclaration && stmt.id) { + if (this.slotBackedDecl(stmt.id.name, this.curScope)) continue; + this.curScope.declare(stmt.id.name, "fn"); + } else { + // `var`s nested in other statements (`if (c) var x = ...`) + // hoist to the function scope too + this.prescanNestedVars(stmt); + } + } for (let s of body.body) this.walkStmt(s); } + // pre-declare var-kind declarations at any statement depth (stopping + // at nested functions, whose vars are their own) + prescanNestedVars(n) { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (let el of n) this.prescanNestedVars(el); + return; + } + switch (n.type) { + case b.FunctionDeclaration: + case b.FunctionExpression: + case b.ArrowFunctionExpression: + return; // function boundary + case b.VariableDeclaration: + if (n.kind !== "var") return; // let/const are block-scoped + for (let d of n.declarations) { + if (d.id.type !== b.Identifier) + throw LowerNotSupported( + `nested var declaration pattern ${d.id.type}`, + n.loc + ); + if (this.slotBackedDecl(d.id.name, this.curScope)) continue; + this.curScope.declare(d.id.name, "local"); + } + return; + default: + for (let k of Object.keys(n)) { + if (k === "loc") continue; + this.prescanNestedVars(n[k]); + } + return; + } + } + analyzeFunction(fnNode, name) { // bind the function's own name outside its scope (like a named // function expression) so recursion resolves to a "self" binding @@ -497,11 +570,10 @@ export class ScopeAnalysis { this.leaveFunction(); return; } - if (this.curScope.names.has(n.id.name)) - throw LowerNotSupported( - `redeclaration of function '${n.id.name}'`, - n.loc - ); + // the walkFnBody prescan already declared this name; + // declare() hands back the same binding. genuine + // same-scope duplicates can't survive HoistFuncDecls + // (its per-name map keeps only the last declaration). let binding = this.curScope.declare(n.id.name, "fn"); this.refs.set(n.id, binding); let name = this.curFn ? `${this.curFn.name}.${n.id.name}` : n.id.name; From e0131712ee4f2163660822ad29f7f5e119460042 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 03:16:35 -0700 Subject: [PATCH 041/146] eir: labeled statements natively; fix legacy labeled-exit label loss MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Labels lower natively: scope analysis keeps a per-function label stack (labels can't cross function boundaries) validating targets — continue only to loop labels — and lowering binds loop labels to the loop's own break/continue blocks (LabeledStatement queues them, the loop lowering claims them; chains like `a: b: while` claim together) while non-loop labels get a synthetic exit block. Each label records the finallyCtx length at entry, so a labeled exit runs exactly the finalizers entered since the label — the same finalizer-duplication machinery unlabeled exits use. This closes the largest remaining fallback category (labeled statements, 7 suite tests' worth). Legacy bugs #24/#25 fixed along the way, found because the new suite test diverged on the legacy stages: - a labeled continue/break crossing NESTED finally scopes lost its label at each hop: visitContinue dropped it entering the first try, and the finally-dispatch trampolines re-exited unlabeled — landing on the INNERMOST loop. Nested finallies are the NORM for labeled loops under legacy (DesugarLetLoopVars wraps every for-let body in one). The label now rides in the destination tuples and every relay passes it along. - LoopExitableScope.exitAft's relabel path passed the label in the fromBreak parameter slot. Validated: test-eir (3 new unit tests; the old unsupported-construct sentinel now uses a tagged template since labels lower), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, and the full toplevel bootstrap (tl-built compiler, tl mode: 395 pass) — test/eir-label1.js output-identical to node on all three paths. Co-Authored-By: Claude Fable 5 --- lib/compiler.js | 14 ++++-- lib/eir/lower.js | 101 +++++++++++++++++++++++++++++++++++++++--- lib/eir/scopes.js | 35 ++++++++++++++- lib/eir/tests.js | 34 +++++++++++++- lib/exitable-scope.js | 30 +++++++++---- test/eir-label1.js | 96 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 292 insertions(+), 18 deletions(-) create mode 100644 test/eir-label1.js diff --git a/lib/compiler.js b/lib/compiler.js index de0f61f4..7434b7f4 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -868,8 +868,12 @@ class LLVMIRVisitor extends TreeVisitor { } visitContinue(n) { + // the label must ride along: when an intervening finally + // intercepts (findLabeledOrFinally returns the TRY scope), its + // exitFore re-dispatches — without the label it continued the + // INNERMOST loop instead of the labeled one if (n.label && n.label.name) - return LoopExitableScope.findLabeledOrFinally(n.label.name).exitFore(); + return LoopExitableScope.findLabeledOrFinally(n.label.name).exitFore(n.label.name); else return LoopExitableScope.findLoopOrFinally().exitFore(); } @@ -2359,9 +2363,13 @@ class LLVMIRVisitor extends TreeVisitor { let dest_tramp = new llvm.BasicBlock("dest_tramp", insertFunc); var dest = scope.destinations[s]; this.doInsideBBlock(dest_tramp, () => { - if (dest.reason == TryExitableScope.REASON_BREAK) dest.scope.exitAft(true); + // relay the label: the destination may itself be a + // finally scope (nested finallies) that must keep + // routing toward the labeled loop + if (dest.reason == TryExitableScope.REASON_BREAK) + dest.scope.exitAft(true, dest.label); else if (dest.reason == TryExitableScope.REASON_CONTINUE) - dest.scope.exitFore(); + dest.scope.exitFore(dest.label); }); switch_stmt.addCase(dest.id, dest_tramp); } diff --git a/lib/eir/lower.js b/lib/eir/lower.js index b0a3e046..57037704 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -28,9 +28,8 @@ // environments, and the %-intrinsic calls listed in intrinsics.js // (produced by the pre-EIR desugar passes, e.g. %arrayFromSpread). // -// Not yet: tagged templates, labeled break/continue, `this` in a -// candidate whose root is itself an arrow (needs the module toplevel's -// this). +// Not yet: tagged templates, `this` in a candidate whose root is itself +// an arrow (needs the module toplevel's this). import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; @@ -99,6 +98,14 @@ class LowerFunction { // switch to the enclosing loop). this.breakTargets = []; this.continueTargets = []; + // labeled targets: LabeledStatement pushes loop labels onto + // pendingLabels; the loop lowering claims them (activeLabels) + // against its own exit/continue blocks. non-loop labels get a + // synthetic exit block. ctxLen = finallyCtx.length at label + // entry, so a labeled exit runs exactly the finalizers entered + // since the label. + this.pendingLabels = []; + this.activeLabels = []; // materialized per-iteration loop envs lexically active at the // current lowering position (innermost last). the current env // value of each is tracked as a builder variable ("%loopenv#id"), @@ -267,6 +274,31 @@ class LowerFunction { if (ble) this.activeLoopEnvs.pop(); } + // a loop lowering claims any labels the enclosing LabeledStatement(s) + // queued, binding them to its own break/continue blocks + claimPendingLabels(breakBlock, continueBlock) { + let n = this.pendingLabels.length; + for (let name of this.pendingLabels) + this.activeLabels.push({ + name: name, + breakBlock: breakBlock, + continueBlock: continueBlock, + ctxLen: this.finallyCtx.length, + }); + this.pendingLabels = []; + return n; + } + + releaseLabels(n) { + while (n-- > 0) this.activeLabels.pop(); + } + + findLabel(name, loc) { + for (let i = this.activeLabels.length - 1; i >= 0; i--) + if (this.activeLabels[i].name === name) return this.activeLabels[i]; + throw LowerNotSupported(`unknown label '${name}'`, loc); + } + // the environment holding `binding`, from the current position envForBinding(binding) { let target = @@ -956,8 +988,47 @@ class LowerFunction { return; case b.TryStatement: return this.tryStmt(n); + case b.LabeledStatement: { + // labels on loops bind to the loop's own blocks (the loop + // lowering claims them); labels on anything else get a + // synthetic exit block for labeled breaks + let body = n.body; + while (body.type === b.LabeledStatement) body = body.body; + let isLoop = + body.type === b.WhileStatement || + body.type === b.DoWhileStatement || + body.type === b.ForStatement || + body.type === b.ForInStatement || + body.type === b.ForOfStatement; + if (isLoop) { + this.pendingLabels.push(n.label.name); + this.stmt(n.body); + return; + } + let exit = this.b.newBlock(`label_${n.label.name}`); + this.activeLabels.push({ + name: n.label.name, + breakBlock: exit, + continueBlock: null, + ctxLen: this.finallyCtx.length, + }); + this.stmt(n.body); + this.activeLabels.pop(); + if (!this.b.cur.terminated) this.b.br(exit, []); + this.b.sealBlock(exit); + this.b.setInsertPoint(exit); + return; + } case b.BreakStatement: { - if (n.label || this.breakTargets.length === 0) + if (n.label) { + let l = this.findLabel(n.label.name, n.loc); + if (this.finallyCtx.length > l.ctxLen) { + if (this.runFinalizers(l.ctxLen)) return; + } + this.b.br(l.breakBlock, []); + return; + } + if (this.breakTargets.length === 0) throw LowerNotSupported("break outside plain loop/switch", n.loc); let targetLen = this.breakTargets.length; let firstCrossed = this.finallyCtx.findIndex((c) => c.breakDepth >= targetLen); @@ -968,7 +1039,17 @@ class LowerFunction { return; } case b.ContinueStatement: { - if (n.label || this.continueTargets.length === 0) + if (n.label) { + let l = this.findLabel(n.label.name, n.loc); + if (!l.continueBlock) + throw LowerNotSupported(`continue to non-loop label '${n.label.name}'`, n.loc); + if (this.finallyCtx.length > l.ctxLen) { + if (this.runFinalizers(l.ctxLen)) return; + } + this.b.br(l.continueBlock, []); + return; + } + if (this.continueTargets.length === 0) throw LowerNotSupported("continue outside plain loop", n.loc); let targetLen = this.continueTargets.length; let firstCrossed = this.finallyCtx.findIndex((c) => c.continueDepth >= targetLen); @@ -1025,11 +1106,13 @@ class LowerFunction { this.breakTargets.push(exit); this.continueTargets.push(header); + let nlabels = this.claimPendingLabels(exit, header); this.b.setInsertPoint(body); let ble = this.enterLoopBody(n); this.stmt(n.body); this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(header, []); + this.releaseLabels(nlabels); this.breakTargets.pop(); this.continueTargets.pop(); @@ -1047,11 +1130,13 @@ class LowerFunction { this.breakTargets.push(exit); this.continueTargets.push(cond_bb); + let nlabels = this.claimPendingLabels(exit, cond_bb); this.b.setInsertPoint(body); let ble = this.enterLoopBody(n); this.stmt(n.body); this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(cond_bb, []); + this.releaseLabels(nlabels); this.breakTargets.pop(); this.continueTargets.pop(); this.b.sealBlock(cond_bb); @@ -1105,11 +1190,13 @@ class LowerFunction { this.breakTargets.push(exit); this.continueTargets.push(update); + let nlabels = this.claimPendingLabels(exit, update); this.b.setInsertPoint(body); let ble = this.enterLoopBody(n); this.stmt(n.body); this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(update, []); + this.releaseLabels(nlabels); this.breakTargets.pop(); this.continueTargets.pop(); this.b.sealBlock(update); @@ -1220,9 +1307,11 @@ class LowerFunction { let ble = this.enterLoopBody(n); this.breakTargets.push(exit); this.continueTargets.push(header); + let nlabels = this.claimPendingLabels(exit, header); this.stmt(n.body); this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(header, []); + this.releaseLabels(nlabels); this.breakTargets.pop(); this.continueTargets.pop(); @@ -1279,9 +1368,11 @@ class LowerFunction { let ble = this.enterLoopBody(n); this.breakTargets.push(exit); this.continueTargets.push(header); + let nlabels = this.claimPendingLabels(exit, header); this.stmt(n.body); this.leaveLoopBody(ble); if (!this.b.cur.terminated) this.b.br(header, []); + this.releaseLabels(nlabels); this.breakTargets.pop(); this.continueTargets.pop(); diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index f42af1c6..3e43758f 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -140,6 +140,10 @@ export class ScopeAnalysis { // set around a for-init declaration walk so the declared bindings // attach to the loop's env candidate this.pendingLoopEnv = null; + // labels are per-function (a labeled break can't cross a function + // boundary); enterFunction/leaveFunction save and restore + this.labelStack = []; + this.savedLabelStacks = []; // toplevel-as-EIR mode (analyzeToplevel): module-scope names backed // by module slots (or const-literal folds). declarations of these // at the root function's top level create NO local binding — every @@ -350,6 +354,8 @@ export class ScopeAnalysis { if (fnNode.generator) throw LowerNotSupported("generator function", fnNode.loc); + this.savedLabelStacks.push(this.labelStack); + this.labelStack = []; this.curFn = info; this.curScope = new LexScope(this.curScope, info); this.curScope.isFnTop = true; @@ -392,6 +398,7 @@ export class ScopeAnalysis { leaveFunction() { this.curScope = this.curScope.parent; this.curFn = this.curFn.parent; + this.labelStack = this.savedLabelStacks.pop(); } pushLoopEnv(node) { @@ -754,9 +761,35 @@ export class ScopeAnalysis { if (n.finalizer) this.walkStmt(n.finalizer); return; } + case b.LabeledStatement: { + if (this.labelStack.some((l) => l.name === n.label.name)) + throw LowerNotSupported(`duplicate label '${n.label.name}'`, n.loc); + // a label chain ending in a loop is continue-able + let body = n.body; + while (body.type === b.LabeledStatement) body = body.body; + let isLoop = + body.type === b.WhileStatement || + body.type === b.DoWhileStatement || + body.type === b.ForStatement || + body.type === b.ForInStatement || + body.type === b.ForOfStatement; + this.labelStack.push({ name: n.label.name, isLoop: isLoop }); + this.walkStmt(n.body); + this.labelStack.pop(); + return; + } case b.BreakStatement: + if (n.label) { + let l = this.labelStack.find((x) => x.name === n.label.name); + if (!l) throw LowerNotSupported(`break to unknown label '${n.label.name}'`, n.loc); + } + return; case b.ContinueStatement: - if (n.label) throw LowerNotSupported("labeled break/continue", n.loc); + if (n.label) { + let l = this.labelStack.find((x) => x.name === n.label.name); + if (!l || !l.isLoop) + throw LowerNotSupported(`continue to non-loop label '${n.label.name}'`, n.loc); + } return; case b.EmptyStatement: return; diff --git a/lib/eir/tests.js b/lib/eir/tests.js index a306dcfc..bc2ccfef 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -312,7 +312,7 @@ test("lower: this expression", () => { test("lower: unsupported constructs raise LowerNotSupported", () => { let threw = false; try { - lowerFunctionNode(parseFn("function t(x) { lbl: for (;;) { break lbl; } }")); + lowerFunctionNode(parseFn("function t(x) { return tag`literal ${x}`; }")); } catch (e) { threw = isLowerNotSupported(e); } @@ -562,6 +562,38 @@ test("scopes: same-named functions get distinct EIR names", () => { assert(new Set(names).size === names.length, `duplicate names: ${names}`); }); +test("lower: labeled break/continue on nested loops", () => { + let { module, fn } = lowerOne( + "function f(g) { outer: for (let i = 0; i < 9; i++) { for (let j = 0; j < 9; j++) { if (g(i, j) < 0) break outer; if (g(i, j) > 9) continue outer; } } return 1; }" + ); + verifyModule(module); + assert(fn.blocks.length > 6, "expected nested loop CFG"); +}); + +test("lower: labeled non-loop statement with break", () => { + let { module, fn } = lowerOne( + "function f(x) { let r = 0; done: { r = 1; if (x) break done; r = 2; } return r; }" + ); + verifyModule(module); + let labelBlock = null; + for (let b of fn.blocks) if (b.name.indexOf("label_done") === 0) labelBlock = b; + assert(labelBlock, "expected the label exit block"); +}); + +test("lower: labeled continue through a finally runs the finalizer", () => { + let { module, fn } = lowerOne( + "function f(xs, log) { outer: for (let i = 0; i < xs.length; i++) { for (let j = 0; j < 2; j++) { try { if (xs[i] < 0) continue outer; } finally { log.push(j); } } } return log; }" + ); + verifyModule(module); + // finalizer duplication: the log.push lowers at least twice (normal + // path + the labeled-continue path) + let pushes = 0; + fn.forEachInst((inst) => { + if (inst.op === "get_prop_atom" && inst.imms.atom === "push") pushes++; + }); + assert(pushes >= 2, `expected duplicated finalizer, saw ${pushes} push loads`); +}); + test("lower: generator function lowers via make_generator/generator_yield", () => { let r = lowerFunctionNode( parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") diff --git a/lib/exitable-scope.js b/lib/exitable-scope.js index c7caf1f7..cab63894 100644 --- a/lib/exitable-scope.js +++ b/lib/exitable-scope.js @@ -66,12 +66,18 @@ export class TryExitableScope extends ExitableScope { return this.landing_pad_block; } - lookupDestinationIdForScope(scope, reason) { + lookupDestinationIdForScope(scope, reason, label = null) { + // the label rides along in the destination: when the destination + // is ANOTHER finally scope (nested finallies — DesugarLetLoopVars + // wraps every for-let body in one), its dispatch must re-exit + // with the label or the continue/break lands on the innermost + // loop instead of the labeled one for (let dest of this.destinations) - if (dest.scope === scope && dest.reason === reason) return dest.id; + if (dest.scope === scope && dest.reason === reason && dest.label === label) + return dest.id; let id = consts.int32(this.destinations.length); - this.destinations.unshift({ scope: scope, reason: reason, id: id }); + this.destinations.unshift({ scope: scope, reason: reason, id: id, label: label }); return id; } @@ -81,11 +87,15 @@ export class TryExitableScope extends ExitableScope { else scope = LoopExitableScope.findLoopOrFinally(this.parent); if (this.hasFinally) { - let reason = this.lookupDestinationIdForScope(scope, TryExitableScope.REASON_CONTINUE); + let reason = this.lookupDestinationIdForScope( + scope, + TryExitableScope.REASON_CONTINUE, + label + ); irbuilder.createStore(reason, this.cleanup_reason); irbuilder.createBr(this.cleanup_bb); } else { - scope.exitFore(); + scope.exitFore(label); } } @@ -104,13 +114,17 @@ export class TryExitableScope extends ExitableScope { if (this.hasFinally) { let reason; if (fromBreak) - reason = this.lookupDestinationIdForScope(scope, TryExitableScope.REASON_BREAK); + reason = this.lookupDestinationIdForScope( + scope, + TryExitableScope.REASON_BREAK, + label + ); else reason = consts.int32(TryExitableScope.REASON_FALLOFF_TRY); irbuilder.createStore(reason, this.cleanup_reason); irbuilder.createBr(this.cleanup_bb); } else { - if (fromBreak) scope.exitAft(fromBreak); + if (fromBreak) scope.exitAft(fromBreak, label); else irbuilder.createBr(this.cleanup_bb); } } @@ -149,7 +163,7 @@ export class LoopExitableScope extends ExitableScope { exitAft(fromBreak, label = null) { if (label && label !== this.label) - LoopExitableScope.findLabeledOrFinally(label).exitAft(label); + LoopExitableScope.findLabeledOrFinally(label).exitAft(fromBreak, label); else irbuilder.createBr(this.aft_bb); } diff --git a/test/eir-label1.js b/test/eir-label1.js new file mode 100644 index 00000000..a1002262 --- /dev/null +++ b/test/eir-label1.js @@ -0,0 +1,96 @@ +// labeled statements and labeled break/continue through EIR + +function labeledBreak(grid) { + let found = ""; + outer: for (let i = 0; i < grid.length; i++) { + for (let j = 0; j < grid[i].length; j++) { + if (grid[i][j] < 0) { found = i + "," + j; break outer; } + } + } + return found || "none"; +} + +function labeledContinue(n) { + let out = []; + outer: for (let i = 0; i < n; i++) { + for (let j = 0; j < n; j++) { + if (j > i) continue outer; + out.push(i + "" + j); + } + } + return out.join(","); +} + +function labeledBlock(x) { + let log = []; + done: { + log.push("a"); + if (x) break done; + log.push("b"); + } + log.push("c"); + return log.join(","); +} + +function labeledThroughFinally(xs) { + let log = []; + outer: for (let i = 0; i < xs.length; i++) { + try { + if (xs[i] < 0) break outer; + log.push("v" + xs[i]); + } finally { + log.push("f" + i); + } + } + return log.join(","); +} + +function labeledContinueThroughFinally(xs) { + let log = []; + outer: for (let i = 0; i < xs.length; i++) { + inner: for (let j = 0; j < 2; j++) { + try { + if (xs[i] < 0) continue outer; + log.push(i + ":" + j); + } finally { + log.push("f" + i + j); + } + } + } + return log.join(","); +} + +function labeledSwitch(k) { + let log = []; + pick: switch (k) { + case 1: + log.push("one"); + if (k === 1) break pick; + log.push("unreached"); + case 2: + log.push("two"); + } + log.push("after"); + return log.join(","); +} + +function labeledWhile(n) { + let c = 0; + again: while (true) { + c++; + if (c < n) continue again; + break again; + } + return c; +} + +console.log(labeledBreak([[1, 2], [3, -1], [5]])); +console.log(labeledBreak([[1], [2]])); +console.log(labeledContinue(3)); +console.log(labeledBlock(true)); +console.log(labeledBlock(false)); +console.log(labeledThroughFinally([7, -2, 9])); +console.log(labeledContinueThroughFinally([4, -5, 6])); +console.log(labeledSwitch(1)); +console.log(labeledSwitch(2)); +console.log(labeledWhile(4)); From 54079bce77d149186be611abe5976075efa00aea Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 03:35:56 -0700 Subject: [PATCH 042/146] eir: object-literal accessors natively; fix legacy get/set pair loss MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Object literals with get/set accessors lower via the new define_accessor op ([obj, getter, setter], imms.atom; flags 0x19 via _ejs_object_define_accessor_property, matching legacy). A get/set pair for one property pairs by NAME into a single define at the first occurrence's position; init properties among accessors store in source order. Computed accessor keys stay a fallback. Legacy bug #26 (the object-literal twin of the class-desugar bug #14): visitObjectExpression's accessor_map keyed by the key AST NODE, so a literal's get/set pair landed in two entries and the second define_accessor_prop — carrying an undefined getter — clobbered the first. Non-computed keys now map by name. Validated: test-eir (1 new unit test), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, TL bootstrap (396 pass); test/eir-accessor1.js output-identical to node on all three paths. Co-Authored-By: Claude Fable 5 --- lib/compiler.js | 30 ++++++++++++++++++---------- lib/eir/emit.js | 17 ++++++++++++++++ lib/eir/lower.js | 40 +++++++++++++++++++++++++++++++++++++ lib/eir/ops.js | 3 +++ lib/eir/scopes.js | 10 +++++----- lib/eir/tests.js | 15 ++++++++++++++ test/eir-accessor1.js | 46 +++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 146 insertions(+), 15 deletions(-) create mode 100644 test/eir-accessor1.js diff --git a/lib/compiler.js b/lib/compiler.js index 7434b7f4..5530c2fa 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -1843,38 +1843,49 @@ class LLVMIRVisitor extends TreeVisitor { let accessor_map = new Map(); - // gather all properties so we can emit get+set as a single call to define_accessor_prop. + // gather all properties so we can emit get+set as a single call to + // define_accessor_prop. non-computed keys map by NAME: keying by + // the key AST node put a get/set pair in separate entries, and the + // second define_accessor_prop (with an undefined getter) clobbered + // the first. + let keyFor = (property) => + property.computed + ? property.key + : property.key.type === b.Identifier + ? property.key.name + : String(property.key.value); + for (let property of n.properties) { if (property.kind === "get" || property.kind === "set") { - if (!accessor_map.has(property.key)) accessor_map.set(property.key, new Map()); - if (accessor_map.get(property.key).has(property.kind)) + if (!accessor_map.has(keyFor(property))) accessor_map.set(keyFor(property), new Map()); + if (accessor_map.get(keyFor(property)).has(property.kind)) throw new SyntaxError( `a '${property.kind}' method for '${escodegenerate( property.key )}' has already been defined.` ); - if (accessor_map.get(property.key).has("init")) + if (accessor_map.get(keyFor(property)).has("init")) throw new SyntaxError( `${property.key.loc.start.line}: property name ${escodegenerate( property.key )} appears once in object literal.` ); } else if (property.kind === "init") { - if (accessor_map.get(property.key)) + if (accessor_map.get(keyFor(property))) throw new SyntaxError( `${property.key.loc.start.line}: property name ${escodegenerate( property.key )} appears once in object literal.` ); - accessor_map.set(property.key, new Map()); + accessor_map.set(keyFor(property), new Map()); } else { throw new Error(`unrecognized property kind '${property.kind}'`); } if (property.computed) { - accessor_map.get(property.key).set("computed", true); + accessor_map.get(keyFor(property)).set("computed", true); } - accessor_map.get(property.key).set(property.kind, property); + accessor_map.get(keyFor(property)).set(property.kind, property); } accessor_map.forEach((prop_map, propkey) => { @@ -1882,8 +1893,7 @@ class LLVMIRVisitor extends TreeVisitor { //key = if property.key.type is Identifier then this.getAtom property.key.name else this.visit property.key if (prop_map.has("computed")) propkey = this.visit(propkey); - else if (propkey.type == b.Literal) propkey = this.getAtom(String(propkey.value)); - else if (propkey.type === b.Identifier) propkey = this.getAtom(propkey.name); + else propkey = this.getAtom(String(propkey)); // name-keyed if (prop_map.has("init")) { let val = this.visit(prop_map.get("init").value); diff --git a/lib/eir/emit.js b/lib/eir/emit.js index d7deae1a..f032b7cd 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -663,6 +663,23 @@ export class EIREmitter { } return arr; } + case "define_accessor": { + // flags 0x19 = enumerable | configurable, matching the + // legacy visitObjectExpression + let key = this.v.getAtom(String(inst.imms.atom)); + return this.emitCallLike( + inst, + rt.object_define_accessor_prop, + [ + this.val(inst.operands[0]), + key, + this.val(inst.operands[1]), + this.val(inst.operands[2]), + consts.int32(0x19), + ], + "defaccessor" + ); + } case "array_from_spread": { // concatenate the operands (array chunks / iterables) into // a fresh array, like the legacy handleArrayFromSpread diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 57037704..c40d20b6 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -411,6 +411,8 @@ class LowerFunction { }); } case b.ObjectExpression: { + let hasAccessors = n.properties.some((p) => p.kind && p.kind !== "init"); + if (hasAccessors) return this.objectWithAccessors(n); let hasComputed = n.properties.some( (p) => p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal) ); @@ -445,6 +447,44 @@ class LowerFunction { } } + // an object literal containing get/set accessors: empty object, then + // per-property defines in source order. a get/set PAIR for one name + // becomes a single define_accessor (name-keyed — keying by the key + // AST node is how the class desugar lost getters, bug #14). + objectWithAccessors(n) { + let obj = this.b.emit("make_object", [], { keys: [] }); + let done = new Set(); + for (let i = 0; i < n.properties.length; i++) { + let p = n.properties[i]; + if (p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal)) + throw LowerNotSupported("computed key in accessor object literal", n.loc); + let name = p.key.type === b.Identifier ? p.key.name : String(p.key.value); + if (p.kind && p.kind !== "init") { + if (done.has(name)) continue; // the pair lowered together + done.add(name); + let getter = null; + let setter = null; + for (let j = i; j < n.properties.length; j++) { + let q = n.properties[j]; + if (q.kind === "init" || q.computed) continue; + let qname = q.key.type === b.Identifier ? q.key.name : String(q.key.value); + if (qname !== name) continue; + if (q.kind === "get") getter = this.expr(q.value); + else if (q.kind === "set") setter = this.expr(q.value); + } + this.b.emit( + "define_accessor", + [obj, getter || this.b.constUndefined(), setter || this.b.constUndefined()], + { atom: name } + ); + } else { + let v = this.expr(p.value); + this.b.emit("set_prop_atom", [obj, v], { atom: name }); + } + } + return obj; + } + literal(n) { if (n.value === null) return this.b.constNull(); switch (typeof n.value) { diff --git a/lib/eir/ops.js b/lib/eir/ops.js index effb8b05..2bdbe267 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -123,6 +123,9 @@ export const OPS = { array_from_spread: { arity: -1, effects: GENERIC_OP }, // imms.keys: array of atom names, one per operand make_object: { arity: -1, effects: E.GC | E.WRITE, imms: ["keys"] }, + // an accessor property on an object literal: [obj, getter, setter] + // (undefined for a missing half); non-computed keys only + define_accessor: { arity: 3, effects: E.GC | E.WRITE, imms: ["atom"] }, // a fresh RegExp per evaluation (ES6 semantics, matching the legacy // visitLiteral); imms.source/imms.flags are strings make_regexp: { arity: 0, effects: E.THROW | E.GC, imms: ["source", "flags"] }, diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 3e43758f..ea11a404 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -959,11 +959,11 @@ export class ScopeAnalysis { return; case b.ObjectExpression: for (let p of n.properties) { - // accessor properties don't fit make_object's plain - // key/value shape — lowering one as an ordinary - // property would silently misbehave - if (p.kind && p.kind !== "init") - throw LowerNotSupported(`object literal ${p.kind}ter`, n.loc); + // accessors lower via define_accessor; computed + // accessor keys don't (rare, and the runtime call + // takes an atom) + if (p.kind && p.kind !== "init" && p.computed) + throw LowerNotSupported(`computed object literal ${p.kind}ter`, n.loc); if (p.computed) this.walkExpr(p.key); this.walkExpr(p.value); } diff --git a/lib/eir/tests.js b/lib/eir/tests.js index bc2ccfef..96375827 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -594,6 +594,21 @@ test("lower: labeled continue through a finally runs the finalizer", () => { assert(pushes >= 2, `expected duplicated finalizer, saw ${pushes} push loads`); }); +test("lower: object-literal accessors define get/set pairs together", () => { + let { module, fn } = lowerOne( + "function f(v) { let o = { a: 1, get n() { return v; }, set n(x) { v = x; } }; return o; }" + ); + verifyModule(module); + let defines = 0; + fn.forEachInst((inst) => { + if (inst.op === "define_accessor") { + defines++; + assert(inst.imms.atom === "n", "accessor key"); + } + }); + assert(defines === 1, `get/set pair must be ONE define_accessor, saw ${defines}`); +}); + test("lower: generator function lowers via make_generator/generator_yield", () => { let r = lowerFunctionNode( parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") diff --git a/test/eir-accessor1.js b/test/eir-accessor1.js new file mode 100644 index 00000000..68f2c109 --- /dev/null +++ b/test/eir-accessor1.js @@ -0,0 +1,46 @@ +// object-literal accessors through EIR (define_accessor); a get/set +// PAIR for one property must keep both halves + +function pair() { + let backing = 5; + let o = { + tag: "t", + get n() { return backing * 10; }, + set n(v) { backing = v + 1; }, + }; + let before = o.n; + o.n = 4; + return o.tag + ":" + before + "," + o.n; +} + +function getterOnly() { + let i = 0; + let o = { get next() { return i++; } }; + return o.next + "," + o.next + "," + o.next; +} + +function setterOnly() { + let log = []; + let o = { set sink(v) { log.push(v); } }; + o.sink = "a"; + o.sink = "b"; + return log.join(",") + "/" + o.sink; +} + +function mixedOrder() { + let o = { + a: 1, + get b() { return this.a + 10; }, + c: 2, + set b(v) { this.a = v; }, + d: 3, + }; + let r1 = o.b; + o.b = 100; + return r1 + "," + o.b + "," + o.c + "," + o.d; +} + +console.log(pair()); +console.log(getterOnly()); +console.log(setterOnly()); +console.log(mixedOrder()); From 705a4a935a9a195b3a99f662bd6d8da91884ee70 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 03:52:45 -0700 Subject: [PATCH 043/146] eir+legacy: new Foo(...args) via %constructApply (never compiled before) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit DesugarSpread grows a visitNewExpression: spread arguments become %constructApply(ctor, %arrayFromSpread(...)) — all-literal spreads flatten back to a plain new. EIR lowers it to the new construct_apply op (construct_closure_apply with newTarget = the constructor); legacy gets the matching handleConstructApply. Spread in `new` positions previously died in the legacy visitor with an unknown-node error and was an EIR fallback. Validated: test-eir, test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, TL bootstrap; test/eir-newspread1.js output-identical to node on all three paths. Co-Authored-By: Claude Fable 5 --- lib/common-ids.js | 1 + lib/compiler.js | 30 ++++++++++++++++++++++++++++++ lib/eir/emit.js | 16 +++++++++++++++- lib/eir/intrinsics.js | 3 +++ lib/eir/ops.js | 2 ++ lib/passes/desugar-spread.js | 19 ++++++++++++++++++- test/eir-newspread1.js | 27 +++++++++++++++++++++++++++ 7 files changed, 96 insertions(+), 2 deletions(-) create mode 100644 test/eir-newspread1.js diff --git a/lib/common-ids.js b/lib/common-ids.js index 9a5d37ae..17a8497a 100644 --- a/lib/common-ids.js +++ b/lib/common-ids.js @@ -17,6 +17,7 @@ export const invokeClosure_id = identifier("%invokeClosure"); export const constructClosure_id = identifier("%constructClosure"); export const constructSuper_id = identifier("%constructSuper"); export const constructSuperApply_id = identifier("%constructSuperApply"); +export const constructApply_id = identifier("%constructApply"); export const setLocal_id = identifier("%setLocal"); export const setGlobal_id = identifier("%setGlobal"); export const getLocal_id = identifier("%getLocal"); diff --git a/lib/compiler.js b/lib/compiler.js index 5530c2fa..80bd2ef3 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -74,6 +74,7 @@ class LLVMIRVisitor extends TreeVisitor { constructClosure: { value: this.handleConstructClosure }, constructSuper: { value: this.handleConstructSuper }, constructSuperApply: { value: this.handleConstructSuperApply }, + constructApply: { value: this.handleConstructApply }, setConstructorKindDerived: { value: this.handleSetConstructorKindDerived, }, @@ -2926,6 +2927,35 @@ class LLVMIRVisitor extends TreeVisitor { ); } + // %constructApply(ctor, argsArray): new Foo(...args) — the runtime + // spreads the dense array (newTarget = the constructor itself) + handleConstructApply(exp) { + let ctor = this.visit(exp.arguments[0]); + let arr = this.visit(exp.arguments[1]); + + let this_alloca = this.createAlloca(this.currentFunction, types.EjsValue, "ctor_apply_this"); + this.storeUndefined(this_alloca); + + const scratchAreaType = llvm.ArrayType.get( + types.EjsValue, + this.currentFunction.scratch_length + ); + let gep = ir.createGetElementPointer( + scratchAreaType, + this.currentFunction.scratch_area, + [consts.int32(0), consts.int64(0)], + "ctor_apply_arg" + ); + ir.createStore(arr, gep); + + return this.createCall( + this.ejs_runtime.construct_closure_apply, + [ctor, this_alloca, consts.int32(1), gep, ctor], + "ctor_apply", + true + ); + } + handleSetConstructorKindDerived(exp) { let ctor = this.visit(exp.arguments[0]); return this.createCall(this.ejs_runtime.set_constructor_kind_derived, [ctor], ""); diff --git a/lib/eir/emit.js b/lib/eir/emit.js index f032b7cd..f3e77010 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -277,7 +277,8 @@ export class EIREmitter { if (inst.op === "call") max = Math.max(max, inst.operands.length - 2); else if (inst.op === "construct" || inst.op === "construct_super") max = Math.max(max, inst.operands.length - 1); - else if (inst.op === "construct_super_apply") max = Math.max(max, 1); + else if (inst.op === "construct_super_apply" || inst.op === "construct_apply") + max = Math.max(max, 1); else if (inst.op === "make_array" || inst.op === "array_from_spread") max = Math.max(max, inst.operands.length); }); @@ -630,6 +631,19 @@ export class EIREmitter { "csuperapply" ); } + case "construct_apply": { + // like construct, but the args arrive as one dense array + // the runtime spreads; this_slot supplies the out-param + let callee = this.val(inst.operands[0]); + let argv = this.spillArgs([this.val(inst.operands[1])]); + ir.createStore(this.undef(), this.this_slot); + return this.emitCallLike( + inst, + rt.construct_closure_apply, + [callee, this.this_slot, consts.int32(1), argv, callee], + "ctorapply" + ); + } case "new_target": { this.values.set(inst, this.fn_new_target); return; diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js index 4b5f37fa..d9ba4bae 100644 --- a/lib/eir/intrinsics.js +++ b/lib/eir/intrinsics.js @@ -36,6 +36,9 @@ export const eir_intrinsics = { "%constructSuper": { op: "construct_super", rebindThis: true }, "%constructSuperApply": { op: "construct_super_apply", rebindThis: true }, + // DesugarSpread (new Foo(...args)) + "%constructApply": { op: "construct_apply" }, + // DesugarMetaProperties (new.target) "%getNewTarget": { op: "new_target" }, diff --git a/lib/eir/ops.js b/lib/eir/ops.js index 2bdbe267..13ceb4a3 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -108,6 +108,8 @@ export const OPS = { // lowering rebinds `this` to the result. construct_super: { arity: -1, effects: GENERIC_OP, may_terminate: true }, construct_super_apply: { arity: 2, effects: GENERIC_OP, may_terminate: true }, + // new Foo(...args): [ctor, args_array]; newTarget = the ctor itself + construct_apply: { arity: 2, effects: GENERIC_OP, may_terminate: true }, // the calling convention's newTarget argument (undefined unless // invoked via construct) new_target: { arity: 0, effects: E.NONE }, diff --git a/lib/passes/desugar-spread.js b/lib/passes/desugar-spread.js index d6a5017c..4ccdc0ea 100644 --- a/lib/passes/desugar-spread.js +++ b/lib/passes/desugar-spread.js @@ -19,7 +19,7 @@ import { TransformPass } from "../node-visitor"; import * as b from "../ast-builder"; import { intrinsic, is_intrinsic } from "../echo-util"; -import { arrayFromSpread_id, apply_id, constructSuperApply_id } from "../common-ids"; +import { arrayFromSpread_id, apply_id, constructSuperApply_id, constructApply_id } from "../common-ids"; // split `args` into %arrayFromSpread operands: runs of plain arguments // become array literals, spread arguments pass through as iterables @@ -91,6 +91,23 @@ export class DesugarSpread extends TransformPass { } } + // new Foo(...args) -> %constructApply(Foo, %arrayFromSpread(...)); + // both pipelines construct through the runtime's dense-array apply + // (spread-new never compiled before) + visitNewExpression(n) { + n = super.visitNewExpression(n); + if (!n.arguments.some((el) => el.type === b.SpreadElement)) return n; + let chunks = spreadChunks(n.arguments); + if (chunks.every((a) => a.type === b.ArrayExpression)) { + let flat = []; + for (let a of chunks) + flat = flat.concat(a.elements.map((el) => (el === null ? b.undefinedLit() : el))); + n.arguments = flat; + return n; + } + return intrinsic(constructApply_id, [n.callee, intrinsic(arrayFromSpread_id, chunks)]); + } + visitCallExpression(n) { n = super.visitCallExpression(n); diff --git a/test/eir-newspread1.js b/test/eir-newspread1.js new file mode 100644 index 00000000..c864788f --- /dev/null +++ b/test/eir-newspread1.js @@ -0,0 +1,27 @@ +// new Foo(...args) — never compiled before (%constructApply) + +function Point(x, y, z) { this.sum = x + y + z; this.len = arguments.length; } + +function spreadNew(xs) { + let p = new Point(...xs); + return p.sum + "/" + p.len; +} + +function mixedNew(xs) { + let p = new Point(1, ...xs); + return p.sum + "/" + p.len; +} + +function litOnlyNew() { + let p = new Point(...[7, 8], 9); + return p.sum + "/" + p.len; +} + +class Tagged { constructor(...parts) { this.tag = parts.join("-"); } } +function classNew(xs) { return new Tagged(...xs, "end").tag; } + +console.log(spreadNew([1, 2, 3])); +console.log(mixedNew([10, 20])); +console.log(litOnlyNew()); +console.log(classNew(["a", "b"])); +console.log(new Point(...[4], 5, ...[6]) instanceof Point); From 322932d80ae464171b75cded479fe230a7b9ea16 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 04:09:54 -0700 Subject: [PATCH 044/146] eir: tagged template literals natively (template_callsite) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The last fallback category. tag`a ${x} b` lowers to a plain call tag(callsite, x) where the callsite object comes from the new template_callsite op: a per-site zero-initialized module global built lazily on first evaluation — gc_add_root, cooked/raw string arrays, frozen raw stored as .raw on the frozen cooked array — mirroring the legacy handleTemplateCallsite (a zeroed ejsval reads as number 0.0, so the is-number check doubles as the uninitialized test). The same site always yields the identical frozen object, per spec. Member-expression tags keep their receiver as `this`. Validated: test-eir (1 new unit test; the unsupported-construct sentinel is now `with`), test-stage{0,1}{,-ir}, test-bootstrap-ir, test-stage3, TL bootstrap (396); test/eir-tagged1.js — including callsite identity across evaluations and raw strings — is output-identical to node on all three paths. Co-Authored-By: Claude Fable 5 --- lib/eir/emit.js | 48 +++++++++++++++++++++++++++++++++++++++++++++ lib/eir/lower.js | 32 ++++++++++++++++++++++++++++-- lib/eir/ops.js | 4 ++++ lib/eir/scopes.js | 5 +++++ lib/eir/tests.js | 15 +++++++++++++- test/eir-tagged1.js | 34 ++++++++++++++++++++++++++++++++ 6 files changed, 135 insertions(+), 3 deletions(-) create mode 100644 test/eir-tagged1.js diff --git a/lib/eir/emit.js b/lib/eir/emit.js index f3e77010..02b5836d 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -281,6 +281,8 @@ export class EIREmitter { max = Math.max(max, 1); else if (inst.op === "make_array" || inst.op === "array_from_spread") max = Math.max(max, inst.operands.length); + else if (inst.op === "template_callsite") + max = Math.max(max, inst.imms.cooked.length, inst.imms.raw.length); }); return max; } @@ -779,6 +781,52 @@ export class EIREmitter { return; } + case "template_callsite": { + // mirror the legacy handleTemplateCallsite: a zeroinit + // per-site global, built lazily (a zeroed ejsval reads as + // number 0.0 — the is-number check doubles as + // "uninitialized"), arrays frozen, cooked.raw = raw + let cooked_strs = inst.imms.cooked; + let raw_strs = inst.imms.raw; + let g = new llvm.GlobalVariable( + this.module, + types.EjsValue, + `_ejs_eir_callsite_${mangle_gen++}`, + llvm.Constant.getAggregateZero(types.EjsValue), + false + ); + let loaded = this.v.createEjsValueLoad(g, "callsite_load"); + let then_bb = new llvm.BasicBlock("callsite_build", this.llvmFn); + let merge_bb = new llvm.BasicBlock("callsite_merge", this.llvmFn); + let from_bb = ir.getInsertBlock(); + let isnum = this.v.isNumber(loaded); + ir.createCondBr(isnum, then_bb, merge_bb); + + ir.setInsertPoint(then_bb); + this.call(rt.gc_add_root, [g], ""); + let mkarr = (strs, name) => { + let vals = strs.map((s) => this.v.getAtom(String(s))); + let argv; + if (vals.length > 0) argv = this.spillArgs(vals); + else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); + return this.call(rt.array_new_copy, [consts.int64(vals.length), argv], name); + }; + let cooked = mkarr(cooked_strs, "callsite_cooked"); + let raw = mkarr(raw_strs, "callsite_raw"); + let frozen_raw = this.call(rt.object_freeze, [raw], "frozen_raw"); + this.call(rt.object_setprop, [cooked, this.v.getAtom("raw"), frozen_raw], ""); + let frozen = this.call(rt.object_freeze, [cooked], "frozen_cooked"); + ir.createStore(frozen, g); + let built_bb = ir.getInsertBlock(); + ir.createBr(merge_bb); + + ir.setInsertPoint(merge_bb); + let phi = ir.createPhi(types.EjsValue, 2, "callsite"); + phi.addIncoming(loaded, from_bb); + phi.addIncoming(frozen, built_bb); + this.values.set(inst, phi); + return; + } case "make_regexp": { let source = consts.string(ir, inst.imms.source); let flags = consts.string(ir, inst.imms.flags); diff --git a/lib/eir/lower.js b/lib/eir/lower.js index c40d20b6..535487ed 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -28,8 +28,8 @@ // environments, and the %-intrinsic calls listed in intrinsics.js // (produced by the pre-EIR desugar passes, e.g. %arrayFromSpread). // -// Not yet: tagged templates, `this` in a candidate whose root is itself -// an arrow (needs the module toplevel's this). +// Not yet: `this` in a candidate whose root is itself an arrow (needs +// the module toplevel's this). import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; @@ -369,6 +369,8 @@ class LowerFunction { return this.update(n); case b.TemplateLiteral: return this.template(n); + case b.TaggedTemplateExpression: + return this.taggedTemplate(n); case b.CallExpression: return this.call(n); case b.NewExpression: @@ -766,6 +768,32 @@ class LowerFunction { return strval || this.b.constAtom(""); } + // tag`lit ${x}` -> tag(callsite, x): the callsite object is a + // per-site cached frozen array (template_callsite); member tags keep + // their receiver as `this`, like any method call + taggedTemplate(n) { + let callsite = this.b.emit("template_callsite", [], { + cooked: n.quasi.quasis.map((q) => q.value.cooked), + raw: n.quasi.quasis.map((q) => q.value.raw), + }); + let subs = n.quasi.expressions.map((e) => this.expr(e)); + + let callee, thisArg; + if (n.tag.type === b.MemberExpression) { + thisArg = this.expr(n.tag.object); + if (!n.tag.computed && n.tag.property.type === b.Identifier) + callee = this.b.emit("get_prop_atom", [thisArg], { atom: n.tag.property.name }); + else { + let key = this.expr(n.tag.property); + callee = this.b.emit("get_prop", [thisArg, key], {}); + } + } else { + callee = this.expr(n.tag); + thisArg = this.b.constUndefined(); + } + return this.b.emit("call", [callee, thisArg, callsite].concat(subs), {}); + } + // `ns.member` where ns is a namespace import of a JS module resolves // to a slot load at compile time (mirroring new-cc's rewrite): the // module object doesn't answer runtime property lookups for its diff --git a/lib/eir/ops.js b/lib/eir/ops.js index 13ceb4a3..c9b4c8da 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -131,6 +131,10 @@ export const OPS = { // a fresh RegExp per evaluation (ES6 semantics, matching the legacy // visitLiteral); imms.source/imms.flags are strings make_regexp: { arity: 0, effects: E.THROW | E.GC, imms: ["source", "flags"] }, + // a tagged template's callsite object: frozen cooked-strings array + // with a frozen .raw, built lazily into a per-site global (emit mints + // the global; the same site always yields the identical object) + template_callsite: { arity: 0, effects: E.GC | E.READ | E.WRITE, imms: ["cooked", "raw"] }, // the rest-parameter array: arguments from index imms.index onward // (empty array if argc <= index) rest_args: { arity: 0, effects: E.GC, imms: ["index"] }, diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index ea11a404..7a3c10c1 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -882,6 +882,11 @@ export class ScopeAnalysis { case b.TemplateLiteral: for (let e of n.expressions) this.walkExpr(e); return; + case b.TaggedTemplateExpression: + if (n.tag.type === b.Identifier) this.reference(n.tag, true); + else this.walkExpr(n.tag); + for (let e of n.quasi.expressions) this.walkExpr(e); + return; case b.CallExpression: // %-intrinsic calls (from the pre-EIR desugar passes): // the callee is a lowering directive, not a reference. diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 96375827..5576d84d 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -312,7 +312,7 @@ test("lower: this expression", () => { test("lower: unsupported constructs raise LowerNotSupported", () => { let threw = false; try { - lowerFunctionNode(parseFn("function t(x) { return tag`literal ${x}`; }")); + lowerFunctionNode(parseFn("function t(x) { with (x) { return y; } }")); } catch (e) { threw = isLowerNotSupported(e); } @@ -609,6 +609,19 @@ test("lower: object-literal accessors define get/set pairs together", () => { assert(defines === 1, `get/set pair must be ONE define_accessor, saw ${defines}`); }); +test("lower: tagged templates lower via template_callsite", () => { + let { module, fn } = lowerOne("function f(tag, x) { return tag`a ${x} b`; }"); + verifyModule(module); + let sites = 0; + fn.forEachInst((inst) => { + if (inst.op === "template_callsite") { + sites++; + assert(inst.imms.cooked.length === 2, "two cooked strings"); + } + }); + assert(sites === 1, `expected one callsite, saw ${sites}`); +}); + test("lower: generator function lowers via make_generator/generator_yield", () => { let r = lowerFunctionNode( parseFnPreEIR("function f() { function* g() { yield 1; yield 2; } return g(); }") diff --git a/test/eir-tagged1.js b/test/eir-tagged1.js new file mode 100644 index 00000000..20299773 --- /dev/null +++ b/test/eir-tagged1.js @@ -0,0 +1,34 @@ +// tagged template literals through EIR (template_callsite) + +function tag(strings, ...subs) { + return strings.join("|") + "/" + strings.raw.join("|") + "/" + subs.join(","); +} + +function basic(x) { + return tag`a ${x} b ${x * 2} c`; +} + +let callsites = []; +function collect(strings) { callsites.push(strings); return "ok"; } +function identity(n) { + for (let i = 0; i < n; i++) collect`same site`; + return callsites.length === n && callsites.every(function (c) { return c === callsites[0]; }); +} + +let o = { + prefix: ">>", + m(strings, v) { return this.prefix + strings[0] + v; }, +}; +function methodTag(v) { + return o.m`lead ${v}`; +} + +function rawEscapes() { + return tag`x\n${1}`; +} + +console.log(basic(5)); +console.log(identity(3)); +console.log(methodTag(9)); +console.log(rawEscapes()); +console.log(tag`only literal`); From 1df185e85ce8c03483ea469c3bbacb80c90fae22 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 04:32:08 -0700 Subject: [PATCH 045/146] =?UTF-8?q?eir:=20flip=20the=20default=20=E2=80=94?= =?UTF-8?q?=20EIR=20is=20the=20pipeline,=20--legacy=20for=20one=20release?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Phase 4. options.ir/ir_toplevel default to true: every module lowers whole (toplevel included) through EIR. Per-function candidate mode and its forwarding thunks are gone — a module the toplevel can't own falls back to the legacy pipeline whole, with a warning naming it (those modules are the blockers for the middle-end deletion). --legacy selects the old pipeline wholesale, for one release; --ir/--ir-toplevel remain as explicit re-enables. CI: the plain stage targets now exercise the EIR default — including the stage2/stage3 byte-identity fixed point under EIR self-compiles, which holds. New test-stage{0,1,2,3}-legacy and test-bootstrap-legacy targets keep the legacy pipeline honest until it's deleted. The old -ir targets remain as explicit-flag duplicates of the default. Validated: the full dual matrix — test-eir, test-stage{0..3} (EIR default), test-{stage0,stage1}-ir, test-bootstrap-ir, and test-{stage0..3,bootstrap}-legacy — all green. Co-Authored-By: Claude Fable 5 --- BUCK | 43 +++++++++++++++++++++++++++++++++++++++++++ docs/plans.md | 31 ++++++++++++++++--------------- ejs-es6.js | 31 +++++++++++++++++++++++++------ lib/compiler.js | 17 +++++++++-------- 4 files changed, 93 insertions(+), 29 deletions(-) diff --git a/BUCK b/BUCK index 5727479e..f0882449 100644 --- a/BUCK +++ b/BUCK @@ -161,3 +161,46 @@ genrule( ) for stage in ["1", "2", "3"] ] + +# the legacy pipeline sticks around for one release behind --legacy; +# these targets keep it honest until it's deleted. the plain stage +# targets above now exercise the EIR default (including the +# stage2/stage3 byte-identity fixed point under EIR self-compiles). +genrule( + name = "test-stage0-legacy", + srcs = ["buck-test-stage.sh"], + out = "test-stage0-legacy.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" - 0 "$(location //test:files)" ' + llvm_bindir() + + " --legacy", +) + +genrule( + name = "ejs.exe.stage2-legacy", + srcs = ["buck-stage.sh"], + out = "ejs.exe.stage2-legacy", + cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" exe ' + + '"$(location :ejs.exe.stage1)" - ' + llvm_bindir() + " --legacy", +) + +genrule( + name = "test-bootstrap-legacy", + srcs = ["buck-test-stage.sh"], + out = "test-bootstrap-legacy.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location :ejs.exe.stage2-legacy)" ' + + '2 "$(location //test:files)" ' + llvm_bindir() + + " --legacy", +) + +[ + genrule( + name = "test-stage" + stage + "-legacy", + srcs = ["buck-test-stage.sh"], + out = "test-stage" + stage + "-legacy.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location :ejs.exe.stage' + stage + ')" ' + + stage + ' "$(location //test:files)" ' + llvm_bindir() + " --legacy", + ) + for stage in ["1", "2", "3"] +] diff --git a/docs/plans.md b/docs/plans.md index b7c4ec26..a9c98b52 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -20,21 +20,22 @@ half of LLVMIRVisitor). The plan, most of which has landed: `lib/eir/intrinsics.js`. Defaults/rest deliberately stay legacy-only: EIR's native handling is strictly better, and the passes die with the legacy pipeline. -3. **Toplevel-as-EIR** (`--ir-toplevel`, in progress) — whole modules - (toplevel statements, import/export init, every nested function) - lower as one EIR unit; the legacy side keeps only module scaffolding. - The full test suite passes under the flag, and the compiler - self-compiles with all 60 of its modules lowering whole. Open: the - toplevel-built compiler must itself bootstrap (currently red in - `--ir` mode), and the remaining per-module fallbacks — labeled - statements, object-literal accessors, tagged templates, - new-with-spread — become native EIR features. Fallback then becomes - a compile error and the forwarding thunks die. -4. **Flip the default** — `--ir` becomes the pipeline, `--legacy` sticks - around for one release, then new-cc/lambda-lift and the visitor - middle-end (~7k lines) are deleted. LLVMIRVisitor keeps only the - module scaffolding the EIR emitter borrows (module info/resolution, - accessors, atom and literal infrastructure). +3. **Toplevel-as-EIR** — done. Whole modules (toplevel statements, + import/export init, every nested function) lower as one EIR unit; + the legacy side keeps only module scaffolding. The toplevel-built + compiler bootstraps and passes the full suite; labeled statements, + object-literal accessors, tagged templates and new-with-spread all + lower natively. Per-function candidate mode and its forwarding + thunks are gone: a module the toplevel can't own falls back to the + legacy pipeline whole, with a warning. +4. **Flip the default** — done. EIR is the pipeline; `--legacy` selects + the old one for one release (CI keeps a `-legacy` target matrix + honest, including its own bootstrap). The stage2/stage3 + byte-identity fixed point now runs under EIR self-compiles. After + the release window: delete new-cc/lambda-lift and the visitor + middle-end (~7k lines), keeping only the module scaffolding the EIR + emitter borrows (module info/resolution, accessors, atom and + literal infrastructure). A pleasant side effect so far: the EIR work has surfaced 21 latent compiler and runtime bugs, most with regression tests. diff --git a/ejs-es6.js b/ejs-es6.js index 6937bb6c..c8fe5d0b 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -108,8 +108,11 @@ let options = { osx_min: "11.0", import_variables: [], srcdir: false, - ir: false, - ir_toplevel: false, + // the EIR (SSA) pipeline is the default: whole modules lower as one + // EIR unit, falling back to the legacy pipeline per module (with a + // warning) for anything it can't own yet. --legacy turns it off. + ir: true, + ir_toplevel: true, ir_exclude: [], ir_exclude_fn: [], stdout_writer: new Writer(process.stdout), @@ -188,13 +191,29 @@ let args = { flag: "quiet", help: "don't output anything during compilation except errors.", }, + "--legacy": { + handler: () => { + options.ir = false; + options.ir_toplevel = false; + }, + handlerArgc: 0, + help: "use the legacy (AST) compilation pipeline instead of EIR. deprecated; one release only.", + }, "--ir": { - flag: "ir", - help: "use the EIR (SSA) pipeline for eligible functions, falling back per function.", + handler: () => { + options.ir = true; + options.ir_toplevel = true; + }, + handlerArgc: 0, + help: "use the EIR (SSA) pipeline (the default; undoes an earlier --legacy).", }, "--ir-toplevel": { - flag: "ir_toplevel", - help: "(bring-up) with --ir, lower whole modules — toplevel included — as one EIR unit, falling back per module.", + handler: () => { + options.ir = true; + options.ir_toplevel = true; + }, + handlerArgc: 0, + help: "alias for --ir (whole-module lowering is the only EIR mode).", }, "--ir-exclude": { handler: (arg) => { diff --git a/lib/compiler.js b/lib/compiler.js index 80bd2ef3..895586b6 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -27,7 +27,7 @@ import { import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; -import { collectEIRFunctions, collectEIRToplevel } from "./eir/integrate"; +import { collectEIRToplevel } from "./eir/integrate"; import { EIREmitter } from "./eir/emit"; let ir = llvm.IRBuilder; @@ -3697,13 +3697,14 @@ export function compile(tree, base_output_filename, source_filename, module_info if (excluded) { debug.log(1, `EIR: ${source_filename}: excluded via --ir-exclude`); } else { - let toplevelLowered = false; - if (options.ir_toplevel) - toplevelLowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); - if (!toplevelLowered) { - let { lowered, fellback } = collectEIRFunctions(tree, source_filename, module_infos, this_module_info, options); - debug.log(1, `EIR: ${source_filename}: ${lowered} function(s) lowered, ${fellback} fell back`); - } + // whole-module or nothing: when the toplevel can't lower, the + // module compiles on the legacy pipeline (per-function + // candidate mode and its forwarding thunks are gone). the + // warning is the tell that legacy is still load-bearing + // somewhere — those modules block the middle-end deletion. + let toplevelLowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); + if (!toplevelLowered) + console.warn(`ejs: ${source_filename}: module fell back to the legacy pipeline`); } } From ed5f23740dc90646ba1064ff741876c6ff9032ba Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 10:44:16 -0700 Subject: [PATCH 046/146] =?UTF-8?q?eir:=20the=20pipeline=20stands=20alone?= =?UTF-8?q?=20=E2=80=94=20no=20legacy=20fallback,=20gaps=20closed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit compile() no longer invokes the legacy middle-end at all: a module that doesn't lower is a compile error. closure conversion, the AST optimizer, AddFunctionsVisitor and the visitor walk are skipped; the toplevel's llvm function is created directly and filled by emitEIRToplevel. Export accessors — the last thing the legacy visitor compiled — are now built directly as EIR (buildModuleAccessors appends get_export_*/set_export_* functions to the module before verification; emitModuleResolution resolves them by name). Constructs legacy supported but EIR guarded against now lower natively: - re-export (`export { a as b } from "m"`): slot-copy at init time - `export {}`: a no-op - `export default function`/`class`: normalized to decl + export - for-of/for-in pattern and member-expression heads (desugared to a fresh-identifier head + binding statement; per-iteration capture semantics preserved via body-scoped lets) - catch-parameter patterns - `debugger`: compiled as a no-op Legacy bug #27: node-visitor's visitSpreadElement assigned the visited child to n.argumentS, discarding it — nested spreads like [...[...xs, 5], 6] never desugared. The remaining source-reachable LowerNotSupported guards are down to `with`, delete-of-a-variable, and computed accessor keys (which no pipeline ever supported; object18.js xfails it) — each asserted by a unit test. Everything else is defensive: the parser rejects it or a pre-EIR desugar removes it. --legacy, --ir-toplevel and --ir-exclude(-fn) are gone (--ir stays as a no-op for one release); the -ir/-legacy buck target matrices collapse into the plain stage ladder, which now IS the EIR matrix. Dead candidate-mode collection (collectEIRFunctions and friends) deleted. New tests: eir-destructure2.js, eir-export1.js (+lib, committed babel-node expected-out), and guard/lowering unit tests in eir/tests.js. Full matrix green: test-eir, test-stage0..3 (stage2/stage3 byte-identity fixed point under EIR self-compiles). Co-Authored-By: Claude Fable 5 --- BUCK | 86 ----- ejs-es6.js | 44 +-- lib/compiler.js | 117 +++---- lib/eir/integrate.js | 379 +++++++--------------- lib/eir/lower.js | 26 ++ lib/eir/scopes.js | 10 +- lib/eir/tests.js | 61 ++++ lib/node-visitor.js | 5 +- lib/passes/desugar-destructuring.js | 63 +++- test/eir-destructure2.js | 70 ++++ test/eir-export1-lib.js | 14 + test/eir-export1.js | 10 + test/expected/eir-export1.js.expected-out | 4 + 13 files changed, 414 insertions(+), 475 deletions(-) create mode 100644 test/eir-destructure2.js create mode 100644 test/eir-export1-lib.js create mode 100644 test/eir-export1.js create mode 100644 test/expected/eir-export1.js.expected-out diff --git a/BUCK b/BUCK index f0882449..e89b56d3 100644 --- a/BUCK +++ b/BUCK @@ -107,15 +107,6 @@ genrule( '"$(location //lib:generated)" - 0 "$(location //test:files)" ' + llvm_bindir(), ) -genrule( - name = "test-stage0-ir", - srcs = ["buck-test-stage.sh"], - out = "test-stage0-ir.log", - cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + - '"$(location //lib:generated)" - 0 "$(location //test:files)" ' + llvm_bindir() + - " --ir", -) - [ genrule( name = "test-stage" + stage, @@ -127,80 +118,3 @@ genrule( ) for stage in ["1", "2", "3"] ] - -# the --ir bootstrap: stage1 compiles the compiler WITH --ir, and the -# resulting binary must pass the full suite (with --ir). this is the -# check that catches --ir miscompiles of the compiler itself, which the -# plain stage2/stage3 fixed point (built without --ir) never exercises. -genrule( - name = "ejs.exe.stage2-ir", - srcs = ["buck-stage.sh"], - out = "ejs.exe.stage2-ir", - cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" exe ' + - '"$(location :ejs.exe.stage1)" - ' + llvm_bindir() + " --ir", -) - -genrule( - name = "test-bootstrap-ir", - srcs = ["buck-test-stage.sh"], - out = "test-bootstrap-ir.log", - cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + - '"$(location //lib:generated)" "$(location :ejs.exe.stage2-ir)" ' + - '2 "$(location //test:files)" ' + llvm_bindir() + - " --ir", -) - -[ - genrule( - name = "test-stage" + stage + "-ir", - srcs = ["buck-test-stage.sh"], - out = "test-stage" + stage + "-ir.log", - cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + - '"$(location //lib:generated)" "$(location :ejs.exe.stage' + stage + ')" ' + - stage + ' "$(location //test:files)" ' + llvm_bindir() + " --ir", - ) - for stage in ["1", "2", "3"] -] - -# the legacy pipeline sticks around for one release behind --legacy; -# these targets keep it honest until it's deleted. the plain stage -# targets above now exercise the EIR default (including the -# stage2/stage3 byte-identity fixed point under EIR self-compiles). -genrule( - name = "test-stage0-legacy", - srcs = ["buck-test-stage.sh"], - out = "test-stage0-legacy.log", - cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + - '"$(location //lib:generated)" - 0 "$(location //test:files)" ' + llvm_bindir() + - " --legacy", -) - -genrule( - name = "ejs.exe.stage2-legacy", - srcs = ["buck-stage.sh"], - out = "ejs.exe.stage2-legacy", - cmd = 'bash $SRCDIR/buck-stage.sh "$(location :srcdir-tree)" exe ' + - '"$(location :ejs.exe.stage1)" - ' + llvm_bindir() + " --legacy", -) - -genrule( - name = "test-bootstrap-legacy", - srcs = ["buck-test-stage.sh"], - out = "test-bootstrap-legacy.log", - cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + - '"$(location //lib:generated)" "$(location :ejs.exe.stage2-legacy)" ' + - '2 "$(location //test:files)" ' + llvm_bindir() + - " --legacy", -) - -[ - genrule( - name = "test-stage" + stage + "-legacy", - srcs = ["buck-test-stage.sh"], - out = "test-stage" + stage + "-legacy.log", - cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + - '"$(location //lib:generated)" "$(location :ejs.exe.stage' + stage + ')" ' + - stage + ' "$(location //test:files)" ' + llvm_bindir() + " --legacy", - ) - for stage in ["1", "2", "3"] -] diff --git a/ejs-es6.js b/ejs-es6.js index c8fe5d0b..1bb0c27c 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -108,13 +108,6 @@ let options = { osx_min: "11.0", import_variables: [], srcdir: false, - // the EIR (SSA) pipeline is the default: whole modules lower as one - // EIR unit, falling back to the legacy pipeline per module (with a - // warning) for anything it can't own yet. --legacy turns it off. - ir: true, - ir_toplevel: true, - ir_exclude: [], - ir_exclude_fn: [], stdout_writer: new Writer(process.stdout), }; @@ -191,43 +184,10 @@ let args = { flag: "quiet", help: "don't output anything during compilation except errors.", }, - "--legacy": { - handler: () => { - options.ir = false; - options.ir_toplevel = false; - }, - handlerArgc: 0, - help: "use the legacy (AST) compilation pipeline instead of EIR. deprecated; one release only.", - }, "--ir": { - handler: () => { - options.ir = true; - options.ir_toplevel = true; - }, - handlerArgc: 0, - help: "use the EIR (SSA) pipeline (the default; undoes an earlier --legacy).", - }, - "--ir-toplevel": { - handler: () => { - options.ir = true; - options.ir_toplevel = true; - }, + handler: () => {}, handlerArgc: 0, - help: "alias for --ir (whole-module lowering is the only EIR mode).", - }, - "--ir-exclude": { - handler: (arg) => { - options.ir_exclude = options.ir_exclude.concat(arg.split(",")); - }, - handlerArgc: 1, - help: "comma-separated filename substrings to exclude from the EIR pipeline (debugging).", - }, - "--ir-exclude-fn": { - handler: (arg) => { - options.ir_exclude_fn = options.ir_exclude_fn.concat(arg.split(",")); - }, - handlerArgc: 1, - help: "comma-separated function-name substrings to exclude from the EIR pipeline (debugging).", + help: "no-op; EIR (SSA) is the only pipeline. accepted for one release.", }, "-I": { handler: add_import_variable, diff --git a/lib/compiler.js b/lib/compiler.js index 895586b6..ae9ae877 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -287,12 +287,15 @@ class LLVMIRVisitor extends TreeVisitor { ); ir.createStore(consts.int32(this.this_module_info.slot_num), num_exports_slot); - // define our accessor properties + // define our accessor properties. getter/setter are EIR function + // names, resolved against the toplevel module's emitted functions for (let accessor of module_accessors) { let get_func = - (accessor.getter && accessor.getter.ir_func) || consts.Null(types.EjsClosureFunc); + (accessor.getter && this.eir_toplevel_fns.get(accessor.getter)) || + consts.Null(types.EjsClosureFunc); let set_func = - (accessor.setter && accessor.setter.ir_func) || consts.Null(types.EjsClosureFunc); + (accessor.setter && this.eir_toplevel_fns.get(accessor.setter)) || + consts.Null(types.EjsClosureFunc); let module_arg = ir.createPointerCast( this.this_module_global, types.EjsModule.pointerTo(), @@ -1400,6 +1403,9 @@ class LLVMIRVisitor extends TreeVisitor { eir_fns = this.eir_emitter.emitModule(n.eir_module); this.eir_emitted.set(n.eir_module, eir_fns); } + // export accessors resolve by name against this map (see + // emitModuleResolution) + this.eir_toplevel_fns = eir_fns; let target = eir_fns.get(n.eir_main); let ir_func = n.ir_func; @@ -3690,49 +3696,13 @@ export function compile(tree, base_output_filename, source_filename, module_info // pipelines see their %-intrinsic output tree = pre_eir_convert(tree, module_filename, module_infos, options); - if (options.ir) { - let excluded = - options.ir_exclude && - options.ir_exclude.some((pat) => source_filename.indexOf(pat) !== -1); - if (excluded) { - debug.log(1, `EIR: ${source_filename}: excluded via --ir-exclude`); - } else { - // whole-module or nothing: when the toplevel can't lower, the - // module compiles on the legacy pipeline (per-function - // candidate mode and its forwarding thunks are gone). the - // warning is the tell that legacy is still load-bearing - // somewhere — those modules block the middle-end deletion. - let toplevelLowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); - if (!toplevelLowered) - console.warn(`ejs: ${source_filename}: module fell back to the legacy pipeline`); - } - } - - debug.log(() => escodegenerate(tree)); - - let toplevel_name = tree.body[0].id.name; - - //debug.log 1, 'before closure conversion' - //debug.log 1, -> escodegenerate tree - - // use the suffix-stripped name: module bindings created during closure - // conversion must use the same key the module was registered under in - // module_infos (imports are always suffix-free; the main file isn't) - tree = closure_convert(tree, module_filename, module_infos, options); - - debug.log(1, "after closure conversion"); - // debug.log(1, () => escodegenerate(tree)); + // EIR is the only pipeline: a module that can't lower is a compile + // error, not a fallback + let lowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); + if (lowered.error) throw new Error(`${source_filename}: ${lowered.error}`); - /* - tree = typeinfer.run tree - - debug.log 1, 'after type inference' - debug.log 1, -> escodegenerate tree - */ - tree = optimizations.run(tree); - - debug.log(1, "after optimization"); - // debug.log(1, () => escodegenerate(tree)); + let toplevel_node = tree.body[0]; + let toplevel_name = toplevel_node.id.name; let module = new llvm.Module(base_output_filename); module.setTriple(triple.llvmTriple()); @@ -3740,25 +3710,6 @@ export function compile(tree, base_output_filename, source_filename, module_info module.toplevel_name = toplevel_name; - let module_accessors = []; - this_module_info.exports.forEach((export_info, key) => { - if (export_info.promoted) return; // hidden slot: no accessors - let module_prop = undefined; - let f = this_module_info.getExportGetter(key); - if (f) { - if (!module_prop) module_prop = { key }; - module_prop.getter = f; - tree.body.push(f); - } - f = this_module_info.getExportSetter(key); - if (f) { - if (!module_prop) module_prop = { key }; - module_prop.setter = f; - tree.body.push(f); - } - if (module_prop) module_accessors.push(module_prop); - }); - let dibuilder; let difile; @@ -3769,13 +3720,33 @@ export function compile(tree, base_output_filename, source_filename, module_info dibuilder.createCompileUnit(source_filename + ".js", process.cwd(), "ejs", true, "", 2); } - let visitor = new AddFunctionsVisitor(module, abi, dibuilder, difile); - - tree = visitor.visit(tree); - - // debug.log(() => escodegenerate(tree)); - - visitor = new LLVMIRVisitor( + // the toplevel's own llvm function — the module-scaffolding wrapper + // that emitEIRToplevel fills and emitModuleResolution finishes + toplevel_node.ir_name = toplevel_name; + toplevel_node.ir_func = types.takes_builtins( + abi.createFunction( + module, + toplevel_name, + abi.ejs_return_type, + abi.ejs_params.map((param) => param.llvm_type) + ) + ); + if (dibuilder && difile) + toplevel_node.ir_func.debug_info = dibuilder.createFunction( + difile, + toplevel_name, + "toplevel", + difile, + 0, + false, + true, + 0, + 0, + true, + toplevel_node.ir_func + ); + + let visitor = new LLVMIRVisitor( module, source_filename, triple, @@ -3791,9 +3762,9 @@ export function compile(tree, base_output_filename, source_filename, module_info visitor.emitModuleInfo(); - visitor.visit(tree); + visitor.emitEIRToplevel(toplevel_node); - visitor.emitModuleResolution(module_accessors); + visitor.emitModuleResolution(lowered.accessors); return module; } diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index c94d459e..b132ce8e 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -2,12 +2,11 @@ * vim: set ts=4 sw=4 et tw=99 ft=js: */ -// --ir integration: pick the functions the EIR pipeline can own, lower and -// verify them, and tag their AST nodes for the legacy pipeline to skip. +// EIR integration: lower the whole module — toplevel statements, +// import/export init, every nested function, and the export accessor +// functions — as one EIR unit (see collectEIRToplevel). // -// candidates are top-level function declarations (exported or not) and -// top-level single-declarator `var f = function () {}` initializers whose -// name is never reassigned. a candidate's free names may be: +// module-scope free names resolve through the refs map built here: // - true globals (console, Math, ...): lowered as get_global; // - named imports from non-native modules: lowered as module_slot_load // (or folded, when the export is a const literal); @@ -17,20 +16,10 @@ // identity is preserved); // - non-exported module-level bindings with literal initializers that // are never reassigned: folded to the literal; -// - sibling candidates in call position: lowered as direct calls into -// the EIR-emitted function (no closure dispatch). viability is a -// fixed point: a candidate depending on a fallen-back sibling falls -// back too. // - non-exported module-level vars promoted to hidden slots by -// gather-imports: module_slot_load/store on "%self" (the legacy -// pipeline routes its accesses through the same slots). -// anything else (non-exported function declarations used as values, -// unsupported syntax) falls back per function via LowerNotSupported. -// -// all of a file's candidates lower into ONE shared EIR module so direct -// calls resolve within it; tagged nodes keep their (emptied) body through -// the legacy passes, and the legacy visitFunction emits a forwarding -// thunk to the EIR-emitted function (see compiler.js). +// gather-imports: module_slot_load/store on "%self". +// anything else unsupported throws LowerNotSupported, which compile() +// reports as a compile error — there is no other pipeline. import * as b from "../ast-builder"; import * as debug from "../debug"; @@ -38,6 +27,7 @@ import { ScopeAnalysis } from "./scopes"; import { lowerAnalyzedFunction } from "./lower"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; import { Module } from "./ir"; +import { FunctionBuilder } from "./builder"; import { verifyModule } from "./verifier"; import { printModule } from "./printer"; @@ -51,90 +41,6 @@ function dumpModule(filename, mode, eir_module) { console.log(printModule(eir_module)); } -function collectPatternNames(pat, out) { - if (!pat) return; - switch (pat.type) { - case b.Identifier: - out.add(pat.name); - return; - case b.ArrayPattern: - for (let el of pat.elements) collectPatternNames(el, out); - return; - case b.ObjectPattern: - for (let p of pat.properties) collectPatternNames(p.value, out); - return; - case b.SpreadElement: - collectPatternNames(pat.argument, out); - return; - default: - return; - } -} - -// module-scope statements may be wrapped in `export` -function unwrapExport(stmt) { - if (stmt.type === b.ExportNamedDeclaration && stmt.declaration && !Array.isArray(stmt.declaration)) - return stmt.declaration; - return stmt; -} - -// `var` declarations hoist to module scope from ANY statement depth -// (`if (c) var print = console.log;` binds `print` at module scope, not -// as a global). walk statements recursively — but not into nested -// functions, whose vars are their own. -function collectNestedVarNames(n, names) { - if (!n || typeof n !== "object") return; - if (Array.isArray(n)) { - for (let el of n) collectNestedVarNames(el, names); - return; - } - switch (n.type) { - case b.FunctionDeclaration: - case b.FunctionExpression: - case b.ArrowFunctionExpression: - return; // function boundary - case b.VariableDeclaration: - if (n.kind === "var") - for (let d of n.declarations) collectPatternNames(d.id, names); - return; - default: - for (let k of Object.keys(n)) { - if (k === "loc") continue; - collectNestedVarNames(n[k], names); - } - return; - } -} - -// names bound at module scope (anything that is NOT a real global) -function collectModuleScopeNames(toplevelBody) { - let names = new Set(); - for (let wrapped of toplevelBody) { - let stmt = unwrapExport(wrapped); - switch (stmt.type) { - case b.FunctionDeclaration: - case b.ClassDeclaration: - if (stmt.id) names.add(stmt.id.name); - break; - case b.VariableDeclaration: - for (let d of stmt.declarations) collectPatternNames(d.id, names); - break; - case b.ImportDeclaration: - for (let spec of stmt.specifiers) { - if (spec.local) names.add(spec.local.name); - else if (spec.id) names.add(spec.id.name); - } - break; - default: - // hoisted vars inside nested statements still bind at - // module scope - collectNestedVarNames(stmt, names); - break; - } - } - return names; -} - // only primitive literals fold; regex literals are objects and need // runtime construction function isFoldableLiteral(n) { @@ -322,38 +228,107 @@ function collectAssignedNames(toplevelBody) { return assigned; } -// the candidate function node + its module-scope name, or null -function candidateOf(wrapped) { - let stmt = unwrapExport(wrapped); - if (stmt.type === b.FunctionDeclaration && stmt.id) - return { name: stmt.id.name, fnNode: stmt }; - // var f = function () { ... }; or var f = (x) => ...; (single - // declarator only) - if ( - stmt.type === b.VariableDeclaration && - stmt.declarations.length === 1 && - stmt.declarations[0].id.type === b.Identifier && - stmt.declarations[0].init && - (stmt.declarations[0].init.type === b.FunctionExpression || - stmt.declarations[0].init.type === b.ArrowFunctionExpression) - ) - return { name: stmt.declarations[0].id.name, fnNode: stmt.declarations[0].init }; - return null; +// each non-promoted export gets a getter (and setter) function on the +// module object so importers resolve it lazily. these used to be tiny +// AST FunctionExpressions compiled by the legacy visitor — the last +// thing it compiled; they're built directly as EIR now. getters fold +// primitive const exports (matching the legacy getExportGetter); +// everything else loads the export's slot on "%self". +function uniqueFnName(eir_module, base) { + let names = new Set(eir_module.functions.map((f) => f.name)); + let name = base; + for (let i = 1; names.has(name); i++) name = `${base}$${i}`; + return name; +} + +function buildModuleAccessors(eir_module, this_module_info) { + let accessors = []; + this_module_info.exports.forEach((export_info, key) => { + if (export_info.promoted) return; // hidden slot: no accessors + + let getter_name = uniqueFnName(eir_module, `get_export_${key}`); + { + let fb = new FunctionBuilder(getter_name, ["%env", "%this"]); + let cv = export_info.constval; + let v; + if (cv && cv.type === b.Literal && cv.value === null) v = fb.constNull(); + else if (cv && cv.type === b.Literal && typeof cv.value === "number") + v = fb.constNumber(cv.value); + else if (cv && cv.type === b.Literal && typeof cv.value === "string") + v = fb.constAtom(cv.value); + else if (cv && cv.type === b.Literal && typeof cv.value === "boolean") + v = fb.constBool(cv.value); + else + v = fb.emit("module_slot_load", [], { + module: "%self", + slot: export_info.slot_num, + }); + fb.emit("return", [v], {}); + eir_module.addFunction(fb.fn); + } + + let setter_name = uniqueFnName(eir_module, `set_export_${key}`); + { + let fb = new FunctionBuilder(setter_name, ["%env", "%this", "value"]); + let v = fb.readVariable("value", fb.cur); + fb.emit("module_slot_store", [v], { + module: "%self", + slot: export_info.slot_num, + }); + fb.emit("return", [fb.constUndefined()], {}); + eir_module.addFunction(fb.fn); + } + + accessors.push({ key: key, getter: getter_name, setter: setter_name }); + }); + return accessors; +} + +// lower the WHOLE module — toplevel statements, import/export init, and +// every nested function — as one EIR unit. module-scope bindings +// resolve through the refs machinery (slots for exported/promoted +// names, const-literal folds); everything else is an ordinary toplevel +// local, captured into the toplevel's environment as needed. returns +// { eir_module, accessors } on success or { error } when something +// doesn't lower — which compile() turns into a compile error. the +// emitted module is wrapped by compiler.js's module-resolution +// scaffolding (see emitEIRToplevel). +// `export default function f() {}` declares a module-scope binding AND +// stores the default-export slot. normalize to the two statements that +// say exactly that; unnamed `export default function () {}` is just an +// expression-form default export. +function normalizeDefaultExports(body) { + for (let i = 0; i < body.length; i++) { + let stmt = body[i]; + if (stmt.type !== b.ExportDefaultDeclaration) continue; + let decl = stmt.declaration; + if (!decl) continue; + if (decl.type === b.FunctionDeclaration) { + if (decl.id) { + stmt.declaration = b.identifier(decl.id.name); + body.splice(i, 0, decl); + i++; + } else { + decl.type = b.FunctionExpression; + } + } else if ( + decl.type === b.VariableDeclaration && + decl.declarations.length === 1 && + decl.declarations[0].id.type === b.Identifier + ) { + // `export default class Foo {}` arrives here post-DesugarClasses + // as `let Foo = ` + stmt.declaration = b.identifier(decl.declarations[0].id.name); + body.splice(i, 0, decl); + i++; + } + } } -// toplevel-as-EIR (phase 3, --ir-toplevel): lower the WHOLE module — -// toplevel statements, import/export init, and every nested function — -// as one EIR unit. module-scope bindings resolve through the same refs -// machinery candidates use (slots for exported/promoted names, -// const-literal folds); everything else is an ordinary toplevel local, -// captured into the toplevel's environment as needed. all-or-nothing -// per module: any LowerNotSupported anywhere returns false and the -// caller falls back to per-candidate collection below. the legacy -// pipeline keeps only the module-resolution scaffolding, which wraps the -// EIR toplevel (see emitEIRToplevel in compiler.js). export function collectEIRToplevel(tree, filename, module_infos, this_module_info, options) { let toplevel = tree.body[0]; let body = toplevel.body.body; + normalizeDefaultExports(body); let assigned = collectAssignedNames(body); let refs = collectModuleRefs(body, module_infos, this_module_info); @@ -368,10 +343,16 @@ export function collectEIRToplevel(tree, filename, module_infos, this_module_inf // no direct sibling calls in toplevel mode: a slot-backed module // function may capture the toplevel environment, which a caller's // envParam wouldn't carry. calls go slot-load + invoke_closure. - let mod_ctx = { refs: refs, siblings: new Map(), this_module_info: this_module_info }; + let mod_ctx = { + refs: refs, + siblings: new Map(), + this_module_info: this_module_info, + module_infos: module_infos, + }; let eir_module = new Module(filename); lowerAnalyzedFunction(info, analysis, eir_module, mod_ctx); + let accessors = buildModuleAccessors(eir_module, this_module_info); verifyModule(eir_module); toplevel.eir_module = eir_module; @@ -379,142 +360,12 @@ export function collectEIRToplevel(tree, filename, module_infos, this_module_inf toplevel.body = { type: b.BlockStatement, body: [], loc: toplevel.loc }; debug.log(1, `EIR: ${filename}: whole module lowered (toplevel-as-EIR)`); if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); - return true; + return { eir_module: eir_module, accessors: accessors }; } catch (e) { if (!isLowerNotSupported(e)) throw e; - debug.log(1, `EIR: ${filename}: toplevel falls back (${e.message})`); - return false; + // there is no legacy pipeline to fall back to anymore: surface + // the reason as a compile error at the call site + return { error: e.message }; } } -// tree is the post-insert_toplevel_func AST (tree.body[0] is the toplevel -// function). returns { lowered, fellback } counts. -export function collectEIRFunctions(tree, filename, module_infos, this_module_info, options) { - let exclude_fns = options && options.ir_exclude_fn; - let toplevel = tree.body[0]; - let body = toplevel.body.body; - - let moduleNames = collectModuleScopeNames(body); - let assigned = collectAssignedNames(body); - let refs = collectModuleRefs(body, module_infos, this_module_info); - addModuleConstLiterals(body, assigned, refs); - - // phase 1: analyze every candidate - let candidates = new Map(); // name -> { fnNode, analysis, info, viable, reason } - for (let wrapped of body) { - let cand = candidateOf(wrapped); - if (!cand) continue; - if (candidates.has(cand.name)) { - candidates.get(cand.name).viable = false; - candidates.get(cand.name).reason = "redeclared at module scope"; - continue; - } - let entry = { fnNode: cand.fnNode, name: cand.name, viable: true, reason: null }; - candidates.set(cand.name, entry); - if (exclude_fns && exclude_fns.some((pat) => cand.name.indexOf(pat) !== -1)) { - entry.viable = false; - entry.reason = "excluded via --ir-exclude-fn"; - continue; - } - if (assigned.has(cand.name)) { - entry.viable = false; - entry.reason = "reassigned at module scope"; - continue; - } - try { - entry.analysis = new ScopeAnalysis(); - entry.info = entry.analysis.analyzeFunction(cand.fnNode, cand.name); - } catch (e) { - if (!(isLowerNotSupported(e))) throw e; - entry.viable = false; - entry.reason = e.message; - } - } - - // phase 2: viability fixed point over free names - let changed = true; - while (changed) { - changed = false; - for (let entry of candidates.values()) { - if (!entry.viable) continue; - for (let name of entry.analysis.globalNames) { - if (!moduleNames.has(name)) continue; // a real global - - // direct call to a viable sibling wins over any slot ref - let sib = candidates.get(name); - if ( - sib && - sib.viable && - sib !== entry && - !entry.analysis.globalValueNames.has(name) - ) - continue; - - let ref = refs.get(name); - if (ref) { - if (entry.analysis.globalAssignedNames.has(name) && !ref.writable) { - entry.viable = false; - entry.reason = `assigns read-only module binding '${name}'`; - changed = true; - break; - } - continue; // resolved via module slot / constant fold - } - - entry.viable = false; - entry.reason = `references module binding '${name}'`; - changed = true; - break; - } - } - } - - // phase 3: lower every viable candidate into one shared module - let eir_module = new Module(filename); - let siblings = new Map(); // local name -> eir function name - for (let entry of candidates.values()) { - if (entry.viable) siblings.set(entry.name, entry.info.name); - } - let mod_ctx = { refs: refs, siblings: siblings }; - - let fellback = 0; - let succeeded = []; - for (let entry of candidates.values()) { - if (!entry.viable) { - if (entry.reason) { - debug.log(1, `EIR: ${filename}: '${entry.name}' falls back (${entry.reason})`); - fellback++; - } - continue; - } - try { - lowerAnalyzedFunction(entry.info, entry.analysis, eir_module, mod_ctx); - succeeded.push(entry); - } catch (e) { - if (!(isLowerNotSupported(e))) throw e; - // lowering found something analysis didn't model. siblings may - // hold direct-call references into this function, so the whole - // file's EIR set is abandoned (nothing has been tagged yet). - debug.log(1, `EIR: ${filename}: '${entry.name}' failed late (${e.message}); disabling EIR for this file`); - return { lowered: 0, fellback: candidates.size }; - } - } - - if (succeeded.length > 0) { - verifyModule(eir_module); - if (dumpRequested(options)) dumpModule(filename, "candidate functions", eir_module); - } - - // only now (everything lowered + verified) tag nodes and empty bodies - for (let entry of succeeded) { - entry.fnNode.eir_module = eir_module; - entry.fnNode.eir_main = entry.info.name; - entry.fnNode.body = { type: b.BlockStatement, body: [], loc: entry.fnNode.loc }; - // expression-bodied arrows just got a block body; keep the legacy - // DesugarArrowFunctions pass from wrapping it in a return - entry.fnNode.expression = false; - debug.log(1, `EIR: ${filename}: '${entry.name}' lowered`); - } - - return { lowered: succeeded.length, fellback: fellback }; -} diff --git a/lib/eir/lower.js b/lib/eir/lower.js index 535487ed..ab2a52ca 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -1012,6 +1012,31 @@ class LowerFunction { case b.ExportNamedDeclaration: { if (!this.isToplevel) throw LowerNotSupported("export declaration", n.loc); if (n.declaration && !Array.isArray(n.declaration)) return this.stmt(n.declaration); + // export { a as b } from "m": copy the source module's + // slots into ours at init time (matching the legacy + // moduleGetSlot/moduleSetSlot rewrite — a snapshot, not a + // live binding) + if (n.source) { + let source = n.source_path.value; + let source_info = + this.mod_ctx.module_infos && this.mod_ctx.module_infos.get(source); + if (!source_info || source_info.isNative()) + throw LowerNotSupported(`re-export from '${source}'`, n.loc); + for (let spec of n.specifiers) { + let export_info = source_info.exports.get(spec.local.name); + if (!export_info || export_info.promoted) + throw LowerNotSupported( + `module '${source}' doesn't export '${spec.local.name}'`, + n.loc + ); + let v = this.b.emit("module_slot_load", [], { + module: source, + slot: export_info.slot_num, + }); + this.storeExportSlot(spec.exported.name, v, n.loc); + } + return; + } // export { A, B as C }: copy the locals' current values // into the exported slots at this statement's position for (let spec of n.specifiers) { @@ -1128,6 +1153,7 @@ class LowerFunction { return; } case b.EmptyStatement: + case b.DebuggerStatement: // a no-op in compiled code return; default: throw LowerNotSupported(`statement type ${n.type}`, n.loc); diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index 7a3c10c1..bcf6b989 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -609,14 +609,19 @@ export class ScopeAnalysis { case b.ExportNamedDeclaration: { if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) throw LowerNotSupported("export declaration", n.loc); - if (n.source) throw LowerNotSupported("re-export", n.loc); + // re-export (`export { a as b } from "m"`): the specifier + // names are the SOURCE module's exports, not local + // references — nothing to resolve here (lowering validates + // them against the source's export table) + if (n.source) return; if (n.declaration && !Array.isArray(n.declaration)) return this.walkStmt(n.declaration); if (n.specifiers && n.specifiers.length > 0) { for (let spec of n.specifiers) this.walkExpr(spec.local); return; } - throw LowerNotSupported("export declaration form", n.loc); + // `export {}` — a valid, empty statement + return; } case b.ExportDefaultDeclaration: { if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) @@ -792,6 +797,7 @@ export class ScopeAnalysis { } return; case b.EmptyStatement: + case b.DebuggerStatement: // a no-op in compiled code return; default: throw LowerNotSupported(`statement type ${n.type}`, n.loc); diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 5576d84d..16b57ca0 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -319,6 +319,21 @@ test("lower: unsupported constructs raise LowerNotSupported", () => { assert(threw, "expected LowerNotSupported"); }); +// the remaining source-reachable LowerNotSupported guards. everything +// else in scopes.js/lower.js is defensive: either the parser rejects the +// construct outright or a pre-EIR desugar pass removes it before EIR +// sees it. these are the constructs a user can actually write that +// don't lower — each must fail loudly (there is no fallback pipeline). +test("lower: delete of a variable raises LowerNotSupported", () => { + let threw = false; + try { + lowerFunctionNode(parseFn("function t(x) { delete x; return 1; }")); + } catch (e) { + threw = isLowerNotSupported(e); + } + assert(threw, "expected LowerNotSupported"); +}); + // --- lowering: per-iteration loop envs --------------------------------------- test("lower: captured for-let var gets a per-iteration env", () => { @@ -415,6 +430,52 @@ test("lower: array literal spread lowers to array_from_spread", () => { assertContains(printFunction(r.fn), "array_from_spread"); }); +test("lower: computed accessor keys raise LowerNotSupported", () => { + // define_accessor takes an atom key; computed accessor keys don't + // lower (object18.js xfails on this end to end) + let threw = false; + try { + lowerFunctionNode( + parseFnPreEIR("function t(k) { return { get [k]() { return 1; } }; }") + ); + } catch (e) { + threw = isLowerNotSupported(e); + } + assert(threw, "expected LowerNotSupported"); +}); + +test("lower: for-of pattern heads desugar pre-EIR", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(ps) { let r = 0; for (let [a, b] of ps) r = r + a * b; return r; }") + ); + verifyModule(r.module); +}); + +test("lower: catch parameter patterns desugar pre-EIR", () => { + let r = lowerFunctionNode( + parseFnPreEIR( + "function f(g) { try { return g(); } catch ({ message }) { return message; } }" + ) + ); + verifyModule(r.module); +}); + +test("lower: nested array spread lowers", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(xs) { return [...[...xs, 5], 6]; }") + ); + verifyModule(r.module); + let printed = printFunction(r.fn); + let first = printed.indexOf("array_from_spread"); + assert(first !== -1, "expected array_from_spread"); + assert(printed.indexOf("array_from_spread", first + 1) !== -1, "expected a second array_from_spread for the nested spread"); +}); + +test("lower: debugger statement is a no-op", () => { + let r = lowerFunctionNode(parseFn("function f() { debugger; return 1; }")); + verifyModule(r.module); +}); + test("lower: unknown %-intrinsics raise LowerNotSupported", () => { let fnNode = parseFnSpreadDesugared("function t(a) { return dummy(a); }"); // synthesize a call to an intrinsic lowering doesn't know diff --git a/lib/node-visitor.js b/lib/node-visitor.js index 0b3b6ba3..3d795325 100644 --- a/lib/node-visitor.js +++ b/lib/node-visitor.js @@ -96,7 +96,8 @@ export class TreeVisitor { rv = this.visitContinue(n, ...args); break; case b.DebuggerStatement: - throw new Error(`Unhandled AST node type: ${n.type}, ${JSON.stringify(n)}`); + rv = n; // compiled as a no-op + break; case b.DoWhileStatement: rv = this.visitDo(n, ...args); break; @@ -466,7 +467,7 @@ export class TreeVisitor { } visitSpreadElement(n, ...args) { - n.arguments = this.visit(n.argument, ...args); + n.argument = this.visit(n.argument, ...args); return n; } diff --git a/lib/passes/desugar-destructuring.js b/lib/passes/desugar-destructuring.js index e8146213..6ad0a894 100644 --- a/lib/passes/desugar-destructuring.js +++ b/lib/passes/desugar-destructuring.js @@ -122,17 +122,68 @@ function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { } export class DesugarDestructuring extends TransformPass { - // don't touch a for-of's binding: DesugarForOf runs later and rewrites - // it into a normal let declaration inside the loop body, which the - // second DesugarDestructuring pass (after DesugarForOf) desugars. - // visiting it here would split the pattern into multiple declarators, - // of which DesugarForOf only keeps the first. - visitForOf(n) { + // a pattern (or member-expression) loop head desugars to a fresh + // identifier head plus a binding statement at the top of the body: + // + // for (let [a, b] of xs) body => for (let %t of xs) { let [a, b] = %t; body } + // for (o.x of xs) body => for (let %t of xs) { o.x = %t; body } + // + // the inner statement then desugars through the ordinary + // declaration/assignment paths. body-scoped `let`s are fresh per + // iteration, preserving per-iteration capture semantics. + desugarForHead(n) { + let head = n.left; + let bindStmt = null; + if (head.type === b.VariableDeclaration) { + let d = head.declarations[0]; + if (head.declarations.length === 1 && d.id.type !== b.Identifier) { + let tmp = fresh(); + let inner = b.variableDeclaration(head.kind, d.id, tmp); + bindStmt = this.visit(inner); + n.left = b.letDeclaration(tmp, null); + // strip the placeholder init: a for-of/for-in head + // declaration has no initializer + n.left.declarations[0].init = null; + } + } else if (head.type !== b.Identifier) { + // ObjectPattern/ArrayPattern assignment form, or a member + // expression target + let tmp = fresh(); + let assign = b.expressionStatement(b.assignmentExpression(head, "=", tmp)); + bindStmt = this.visit(assign); + n.left = b.letDeclaration(tmp, null); + n.left.declarations[0].init = null; + } n.right = this.visit(n.right); n.body = this.visit(n.body); + if (bindStmt) { + let stmts = Array.isArray(bindStmt) ? bindStmt : [bindStmt]; + n.body = b.blockStatement(stmts.concat([n.body])); + } return n; } + visitForOf(n) { + return this.desugarForHead(n); + } + + visitForIn(n) { + return this.desugarForHead(n); + } + + // catch ({ message }) { ... } => catch (%t) { let { message } = %t; ... } + visitCatchClause(n) { + if (n.param && n.param.type !== b.Identifier) { + let tmp = fresh(); + let bindDecl = this.visit(b.letDeclaration(n.param, tmp)); + n.param = tmp; + n.body = this.visit(n.body); + n.body.body.unshift(bindDecl); + return n; + } + return super.visitCatchClause(n); + } + visitFunction(n) { // we visit the formal parameters directly, rewriting // them as tmp arg names and adding 'let' decls for the diff --git a/test/eir-destructure2.js b/test/eir-destructure2.js new file mode 100644 index 00000000..afb30cb6 --- /dev/null +++ b/test/eir-destructure2.js @@ -0,0 +1,70 @@ +// pattern (and member-expression) loop heads, catch-parameter patterns, +// nested spreads, debugger statements: constructs that used to fall back +// to the legacy pipeline and now lower natively. + +function forOfArrayPattern(ps) { + let r = 0; + for (let [a, b] of ps) r += a * b; + return r; +} + +function forOfObjectPattern(items) { + let names = []; + for (const { name, n } of items) names.push(`${name}:${n}`); + return names.join(","); +} + +function forOfPatternCapture(ps) { + // body-scoped lets are per-iteration: each closure sees its own a/b + let fns = []; + for (let [a, b] of ps) fns.push(() => a + b); + return fns.map((f) => f()).join(","); +} + +function forOfMemberTarget(xs) { + let o = { last: null, seen: [] }; + for (o.last of xs) o.seen.push(o.last); + return `${o.seen.join("-")}|${o.last}`; +} + +function forInPattern(obj) { + let ks = []; + for (const k in obj) ks.push(k); + return ks.sort().join(","); +} + +function forOfAssignmentPattern(ps) { + let a, b; + let sums = []; + for ([a, b] of ps) sums.push(a + b); + return sums.join(","); +} + +function catchPattern(f) { + try { + f(); + return "no throw"; + } catch ({ message, code = 42 }) { + return `${message}/${code}`; + } +} + +function nestedSpread(xs) { + return [...[...xs, 5], 6]; +} + +function debuggerNoop(x) { + debugger; + return x + 1; +} + +console.log(forOfArrayPattern([[1, 2], [3, 4]])); +console.log(forOfObjectPattern([{ name: "a", n: 1 }, { name: "b", n: 2 }])); +console.log(forOfPatternCapture([[1, 2], [30, 4]])); +console.log(forOfMemberTarget(["x", "y", "z"])); +console.log(forInPattern({ q: 1, r: 2 })); +console.log(forOfAssignmentPattern([[1, 1], [2, 3]])); +console.log(catchPattern(() => { throw new Error("boom"); })); +console.log(catchPattern(() => 0)); +console.log(nestedSpread([1, 2]).join(" ")); +console.log(debuggerNoop(9)); diff --git a/test/eir-export1-lib.js b/test/eir-export1-lib.js new file mode 100644 index 00000000..bfc9b314 --- /dev/null +++ b/test/eir-export1-lib.js @@ -0,0 +1,14 @@ +export default class Counter { + constructor(n) { + this.n = n; + } + inc() { + return ++this.n; + } +} + +export const K = 7; + +export function mk() { + return "mk"; +} diff --git a/test/eir-export1.js b/test/eir-export1.js new file mode 100644 index 00000000..90ed4dd4 --- /dev/null +++ b/test/eir-export1.js @@ -0,0 +1,10 @@ +// generator: babel-node +// `export default class`, default+named import, and re-export +import Counter, { K, mk } from "./eir-export1-lib"; +export { mk as remk } from "./eir-export1-lib"; + +let c = new Counter(K); +console.log(c.inc()); +console.log(c.inc()); +console.log(K); +console.log(mk()); diff --git a/test/expected/eir-export1.js.expected-out b/test/expected/eir-export1.js.expected-out new file mode 100644 index 00000000..a209119a --- /dev/null +++ b/test/expected/eir-export1.js.expected-out @@ -0,0 +1,4 @@ +8 +9 +7 +mk From 31c4f1219d3491b538d9e89b6e08d4f54316e2cb Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 10:56:31 -0700 Subject: [PATCH 047/146] eir: delete the legacy middle-end MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The AST+intrinsics pipeline is gone: new-cc, LambdaLift, exitable-scope, the statement/expression half of LLVMIRVisitor (its visit* methods, the %-intrinsic handler table and everything reachable only from them), AddFunctionsVisitor, the AST optimizer (optimizations.js/ReplaceUnaryVoid), module-info's AST accessor generation, and eleven legacy-only desugar passes (import-export, defaults, rest-parameters, templates, arrow-functions, for-of, let-loopvars, update-assignments, hoist-vars, func-decls-to-vars, name-anonymous-functions, arguments) plus the unused idiom passes. LLVMIRVisitor keeps only what the EIR emitter borrows and what compile() calls directly: module info/resolution, the atom and string-literal infrastructure, emitEIRToplevel, and the small ejsval/alloca helpers on the emitter's surface. createCall loses its invoke path — nothing this visitor emits runs inside a protected region; EIR-emitted code manages its own invoke/landingpad pairs. closure-conversion.js is now just the pre-EIR desugar list (classes, destructuring, generators, spread, meta-properties, function-declaration hoisting) behind preEIRConvert. ~6900 lines deleted. Full matrix green: test-eir, test-stage0..3 (stage2/stage3 byte-identity fixed point under EIR self-compiles). Co-Authored-By: Claude Fable 5 --- docs/plans.md | 37 +- lib/closure-conversion.js | 101 +- lib/compiler.js | 3405 ++-------------------- lib/exitable-scope.js | 196 -- lib/module-info.js | 50 +- lib/optimizations.js | 20 - lib/passes/desugar-arguments.js | 40 - lib/passes/desugar-arrow-functions.js | 153 - lib/passes/desugar-defaults.js | 61 - lib/passes/desugar-for-of.js | 94 - lib/passes/desugar-import-export.js | 315 -- lib/passes/desugar-let-loopvars.js | 174 -- lib/passes/desugar-rest-parameters.js | 68 - lib/passes/desugar-templates.js | 91 - lib/passes/desugar-update-assignments.js | 104 - lib/passes/eq-idioms.js | 122 - lib/passes/func-decls-to-vars.js | 29 - lib/passes/hoist-vars.js | 134 - lib/passes/iife-idioms.js | 180 -- lib/passes/lambda-lift.js | 66 - lib/passes/name-anonymous-functions.js | 34 - lib/passes/new-cc.js | 1164 -------- lib/passes/replace-unary-void.js | 15 - lib/passes/substitute-variables.js | 468 --- 24 files changed, 202 insertions(+), 6919 deletions(-) delete mode 100644 lib/exitable-scope.js delete mode 100644 lib/optimizations.js delete mode 100644 lib/passes/desugar-arguments.js delete mode 100644 lib/passes/desugar-arrow-functions.js delete mode 100644 lib/passes/desugar-defaults.js delete mode 100644 lib/passes/desugar-for-of.js delete mode 100644 lib/passes/desugar-import-export.js delete mode 100644 lib/passes/desugar-let-loopvars.js delete mode 100644 lib/passes/desugar-rest-parameters.js delete mode 100644 lib/passes/desugar-templates.js delete mode 100644 lib/passes/desugar-update-assignments.js delete mode 100644 lib/passes/eq-idioms.js delete mode 100644 lib/passes/func-decls-to-vars.js delete mode 100644 lib/passes/hoist-vars.js delete mode 100644 lib/passes/iife-idioms.js delete mode 100644 lib/passes/lambda-lift.js delete mode 100644 lib/passes/name-anonymous-functions.js delete mode 100644 lib/passes/new-cc.js delete mode 100644 lib/passes/replace-unary-void.js delete mode 100644 lib/passes/substitute-variables.js diff --git a/docs/plans.md b/docs/plans.md index a9c98b52..a887b9cd 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -3,11 +3,12 @@ A living document; ordering within a section is roughly priority. See `EIRProposal.md` for the IR design itself. -## Kill the legacy pipeline (in progress) +## Kill the legacy pipeline (done) -EIR (the block-argument SSA middle-end in `lib/eir/`) replaces the +EIR (the block-argument SSA middle-end in `lib/eir/`) replaced the AST+intrinsics pipeline (new-cc, LambdaLift, the statement/expression -half of LLVMIRVisitor). The plan, most of which has landed: +half of LLVMIRVisitor). All four phases landed, and the legacy +middle-end has been deleted outright: 1. **Close the per-function gaps** — done. The self-hosted compiler lowers 424/424 candidate functions with zero fallbacks (try/finally, @@ -28,17 +29,21 @@ half of LLVMIRVisitor). The plan, most of which has landed: lower natively. Per-function candidate mode and its forwarding thunks are gone: a module the toplevel can't own falls back to the legacy pipeline whole, with a warning. -4. **Flip the default** — done. EIR is the pipeline; `--legacy` selects - the old one for one release (CI keeps a `-legacy` target matrix - honest, including its own bootstrap). The stage2/stage3 - byte-identity fixed point now runs under EIR self-compiles. After - the release window: delete new-cc/lambda-lift and the visitor - middle-end (~7k lines), keeping only the module scaffolding the EIR - emitter borrows (module info/resolution, accessors, atom and - literal infrastructure). +4. **Flip the default, then delete** — done. EIR is the only pipeline. + A module that doesn't lower is a compile error; the remaining + source-reachable unsupported constructs (`with`, delete-of-a- + variable, computed accessor keys — which no pipeline ever compiled) + are each asserted by a unit test, and everything else is guarded + defensively behind the parser or the pre-EIR desugars. new-cc, + LambdaLift, exitable-scope, the visitor middle-end and eleven + legacy-only desugar passes are gone (~9k lines); LLVMIRVisitor keeps + only the module scaffolding the EIR emitter borrows (module + info/resolution, atoms, literal infrastructure). Export accessors + are built directly as EIR. The stage2/stage3 byte-identity fixed + point runs under EIR self-compiles. -A pleasant side effect so far: the EIR work has surfaced 21 latent -compiler and runtime bugs, most with regression tests. +A pleasant side effect: the EIR work surfaced 27 latent compiler and +runtime bugs, most with regression tests. ## Optimization phase (after the legacy kill) @@ -96,6 +101,8 @@ Static linking remains the regime (no dynamic loading planned). ## Testing / CI -- Dedicated CI steps for the `--ir-toplevel` configuration (the - buck-stage machinery already takes extra flags). +- The stage ladder (`//:test-eir`, `//:test-stage0..3`) IS the EIR + matrix now; the `-ir`/`-legacy` target duplicates are gone. - Broader coverage generally, as a prerequisite for the TS port. +- Computed accessor keys (`{ get [k]() {} }`) need an ejsval-key + variant of the define-accessor runtime call to un-xfail object18.js. diff --git a/lib/closure-conversion.js b/lib/closure-conversion.js index 6d312747..3e62752a 100644 --- a/lib/closure-conversion.js +++ b/lib/closure-conversion.js @@ -2,108 +2,39 @@ * vim: set ts=4 sw=4 et tw=99 ft=js: */ -import { DesugarArguments } from "./passes/desugar-arguments"; -import { DesugarImportExport } from "./passes/desugar-import-export"; import { DesugarClasses } from "./passes/desugar-classes"; import { DesugarDestructuring } from "./passes/desugar-destructuring"; -import { DesugarUpdateAssignments } from "./passes/desugar-update-assignments"; -import { DesugarTemplates } from "./passes/desugar-templates"; -import { DesugarArrowFunctions } from "./passes/desugar-arrow-functions"; import { DesugarGeneratorFunctions } from "./passes/desugar-generator-functions"; -import { DesugarDefaults } from "./passes/desugar-defaults"; -import { DesugarRestParameters } from "./passes/desugar-rest-parameters"; -import { DesugarForOf } from "./passes/desugar-for-of"; import { DesugarSpread } from "./passes/desugar-spread"; import { DesugarMetaProperties } from "./passes/desugar-metaproperties"; import { HoistFuncDecls } from "./passes/hoist-func-decls"; -import { FuncDeclsToVars } from "./passes/func-decls-to-vars"; -import { DesugarLetLoopVars } from "./passes/desugar-let-loopvars"; -import { HoistVars } from "./passes/hoist-vars"; -import { NameAnonymousFunctions } from "./passes/name-anonymous-functions"; -import { NewClosureConvert } from "./passes/new-cc"; -//import { IIFEIdioms } from './passes/iife-idioms'; -import { LambdaLift } from "./passes/lambda-lift"; import * as escodegen from "../external-deps/escodegen/escodegen-es6"; import * as debug from "./debug"; -// the HoistFuncDecls phase transforms the AST to give v8 semantics -// when faced with multiple function declarations within the same -// function scope. -// -const enable_hoist_func_decls_pass = true; - -// pipeline-agnostic AST->AST rewrites that run BEFORE collectEIRFunctions -// (phase 2 of the legacy-removal plan): constructs EIR has no native -// lowering for arrive there as %-intrinsic calls, which lower through -// lib/eir/intrinsics.js. the legacy pipeline consumes the same output -// (its own %-intrinsic handling predates EIR), so both pipelines see one -// AST. +// the AST->AST desugar passes that run before EIR collection: constructs +// EIR has no native lowering for arrive there as %-intrinsic calls, which +// lower through lib/eir/intrinsics.js. // // DesugarClasses, then DesugarDestructuring, then -// DesugarGeneratorFunctions, then DesugarSpread — the legacy relative -// order: super(...args) desugars into %constructSuper(ref, ...args) -// first, patterns unfold into member/iterator reads, generator methods -// desugar as plain function expressions, and the spread pass then -// rewrites what remains. running these before DesugarImportExport means -// `export class Foo` reaches it as `export let Foo = (...)` — the -// same %moduleSetSlot store. -// -// only the FIRST destructuring run hoists; the second (below) cleans up -// the patterns DesugarForOf re-emits. trailing ...rest params pass -// through it untouched (EIR is native; the legacy rest pass strips them -// later). +// DesugarGeneratorFunctions, then DesugarSpread: super(...args) desugars +// into %constructSuper(ref, ...args) first, patterns unfold into +// member/iterator reads, generator methods desugar as plain function +// expressions, and the spread pass then rewrites what remains. // -// DesugarSpread also stays in the main list below as a safety net for -// spreads synthesized by later passes (currently none). -// -// DesugarDefaults and DesugarRestParameters deliberately do NOT hoist: -// EIR handles both natively and strictly better. DesugarDefaults -// rewrites EVERY parameter (defaulted or not) into an argc-guarded -// `let p = %getArg(i, dflt)` load, where EIR emits a conditional only -// for parameters that have defaults and keeps the rest as direct SSA -// values. DesugarRestParameters' %arrayFromRest needs the legacy -// handler's scope mutation (it registers the rest name in the visitor's -// topScope), where EIR's rest_args op is a branch-free select. Both -// passes serve only the legacy pipeline (fallback functions and the -// toplevel) and die with it in phase 4 rather than hoisting. // HoistFuncDecls hoists last: nothing after it (spread/meta emit no // function declarations) re-creates block-level decls. it gives v8 // semantics — block-level declarations hoist to function scope, and -// same-name redeclarations collapse to the last one — which used to be -// per-function fallbacks in EIR; at the toplevel it also moves the -// closure slot stores to the top, where hoisting says they belong. +// same-name redeclarations collapse to the last one; at the toplevel it +// also moves the closure slot stores to the top, where hoisting says +// they belong. const pre_eir_passes = [ DesugarClasses, DesugarDestructuring, DesugarGeneratorFunctions, DesugarSpread, DesugarMetaProperties, - enable_hoist_func_decls_pass ? HoistFuncDecls : null, -]; - -const passes = [ - DesugarImportExport, - DesugarRestParameters, - DesugarUpdateAssignments, - DesugarTemplates, - DesugarArrowFunctions, - DesugarDefaults, - DesugarForOf, - // DesugarForOf re-emits the loop's binding pattern as a fresh let - // declaration (`let [k,v] = %iter_next.value`), so destructuring has - // to run again after it. the first DesugarDestructuring pass still - // has to run before DesugarDefaults, which assumes simple params. - DesugarDestructuring, - DesugarSpread, - FuncDeclsToVars, - DesugarLetLoopVars, - HoistVars, - NameAnonymousFunctions, - DesugarArguments, - NewClosureConvert, - //IIFEIdioms, - LambdaLift, + HoistFuncDecls, ]; function runPasses(passList, tree, filename, modules, options) { @@ -135,15 +66,7 @@ function runPasses(passList, tree, filename, modules, options) { return tree; } -// runs in compile() before collectEIRFunctions, on both the --ir and -// legacy paths +// runs in compile() before collectEIRToplevel export function preEIRConvert(tree, filename, modules, options) { return runPasses(pre_eir_passes, tree, filename, modules, options); } - -export function convert(tree, filename, modules, options) { - debug.log("before:"); - debug.log(() => escodegen.generate(tree)); - - return runPasses(passes, tree, filename, modules, options); -} diff --git a/lib/compiler.js b/lib/compiler.js index ae9ae877..a6f76104 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -4,26 +4,15 @@ import * as llvm from "@llvm"; -import { Stack } from "./stack-es6"; -import { TreeVisitor } from "./node-visitor"; -import { generate as escodegenerate } from "../external-deps/escodegen/escodegen-es6"; -import { convert as closure_convert, preEIRConvert as pre_eir_convert } from "./closure-conversion"; -import * as optimizations from "./optimizations"; +import { preEIRConvert as pre_eir_convert } from "./closure-conversion"; import * as types from "./types"; import * as consts from "./consts"; import * as runtime from "./runtime"; import * as debug from "./debug"; import * as b from "./ast-builder"; -import { startGenerator, is_intrinsic } from "./echo-util"; -import { - ExitableScope, - TryExitableScope, - SwitchExitableScope, - LoopExitableScope, - LabeledStatementExitableScope, -} from "./exitable-scope"; +import { startGenerator } from "./echo-util"; import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; @@ -34,9 +23,8 @@ let ir = llvm.IRBuilder; let hasOwn = Object.prototype.hasOwnProperty; -class LLVMIRVisitor extends TreeVisitor { +class LLVMIRVisitor { constructor(module, filename, triple, options, abi, allModules, this_module_info, dibuilder, difile) { - super(); this.module = module; this.filename = filename; this.triple = triple; @@ -51,99 +39,6 @@ class LLVMIRVisitor extends TreeVisitor { if (this.options.record_types) this.genRecordId = startGenerator(); - // build up our runtime method table - this.ejs_intrinsics = Object.create(null, { - templateDefaultHandlerCall: { - value: this.handleTemplateDefaultHandlerCall, - }, - templateCallsite: { value: this.handleTemplateCallsite }, - moduleGet: { value: this.handleModuleGet }, - moduleGetSlot: { value: this.handleModuleGetSlot }, - moduleSetSlot: { value: this.handleModuleSetSlot }, - moduleGetExotic: { value: this.handleModuleGetExotic }, - getArgumentsObject: { value: this.handleGetArgumentsObject }, - getLocal: { value: this.handleGetLocal }, - setLocal: { value: this.handleSetLocal }, - getGlobal: { value: this.handleGetGlobal }, - setGlobal: { value: this.handleSetGlobal }, - getArg: { value: this.handleGetArg }, - getNewTarget: { value: this.handleGetNewTarget }, - slot: { value: this.handleGetSlot }, - setSlot: { value: this.handleSetSlot }, - invokeClosure: { value: this.handleInvokeClosure }, - constructClosure: { value: this.handleConstructClosure }, - constructSuper: { value: this.handleConstructSuper }, - constructSuperApply: { value: this.handleConstructSuperApply }, - constructApply: { value: this.handleConstructApply }, - setConstructorKindDerived: { - value: this.handleSetConstructorKindDerived, - }, - setConstructorKindBase: { - value: this.handleSetConstructorKindBase, - }, - makeClosure: { value: this.handleMakeClosure }, - makeClosureNoEnv: { value: this.handleMakeClosureNoEnv }, - makeAnonClosure: { value: this.handleMakeAnonClosure }, - makeGenerator: { value: this.handleMakeGenerator }, - generatorYield: { value: this.handleGeneratorYield }, - createArgScratchArea: { value: this.handleCreateArgScratchArea }, - makeClosureEnv: { value: this.handleMakeClosureEnv }, - typeofIsObject: { value: this.handleTypeofIsObject }, - typeofIsFunction: { value: this.handleTypeofIsFunction }, - typeofIsString: { value: this.handleTypeofIsString }, - typeofIsSymbol: { value: this.handleTypeofIsSymbol }, - typeofIsNumber: { value: this.handleTypeofIsNumber }, - typeofIsBoolean: { value: this.handleTypeofIsBoolean }, - builtinUndefined: { value: this.handleBuiltinUndefined }, - isNullOrUndefined: { value: this.handleIsNullOrUndefined }, - isUndefined: { value: this.handleIsUndefined }, - isNull: { value: this.handleIsNull }, - setPrototypeOf: { value: this.handleSetPrototypeOf }, - objectCreate: { value: this.handleObjectCreate }, - arrayFromRest: { value: this.handleArrayFromRest }, - arrayFromSpread: { value: this.handleArrayFromSpread }, - createIterResult: { value: this.handleCreateIterResult }, - createIteratorWrapper: { value: this.handleCreateIteratorWrapper }, - }); - - this.opencode_intrinsics = { - unaryNot: true, - - templateDefaultHandlerCall: true, - - moduleGet: true, // unused - moduleGetSlot: true, - moduleSetSlot: true, - moduleGetExotic: true, - - getLocal: true, // unused - setLocal: true, // unused - getGlobal: true, // unused - setGlobal: true, // unused - slot: true, - setSlot: true, - - invokeClosure: false, - constructClosure: false, - makeClosure: true, - makeAnonClosure: true, - createArgScratchArea: true, - makeClosureEnv: true, - setConstructorKindDerived: false, - setConstructorKindBase: false, - - typeofIsObject: true, - typeofIsFunction: true, - typeofIsString: true, - typeofIsSymbol: true, - typeofIsNumber: true, - typeofIsBoolean: true, - builtinUndefined: true, - isNullOrUndefined: false, // unused - isUndefined: true, - isNull: true, - }; - this.llvm_intrinsics = { gcroot: () => module.getOrInsertIntrinsic("@llvm.gcroot"), }; @@ -181,8 +76,6 @@ class LLVMIRVisitor extends TreeVisitor { // this function is only ever called by this module's toplevel this.literalInitializationFunction.setInternalLinkage(); - // initialize the scope stack with the global (empty) scope - this.scope_stack = new Stack(new Map()); let entry_bb = new llvm.BasicBlock("entry", this.literalInitializationFunction); let return_bb = new llvm.BasicBlock("return", this.literalInitializationFunction); @@ -338,23 +231,6 @@ class LLVMIRVisitor extends TreeVisitor { } // result should be the landingpad's value - beginCatch(result) { - return this.createCall( - this.ejs_runtime.begin_catch, - [ir.createPointerCast(result, types.Int8Pointer, "")], - "begincatch" - ); - } - endCatch() { - return this.createCall(this.ejs_runtime.end_catch, [], "endcatch"); - } - - doInsideExitableScope(scope, f) { - scope.enter(); - f(); - scope.leave(); - } - doInsideBBlock(b, f) { let saved = ir.getInsertBlock(); ir.setInsertPoint(b); @@ -363,11 +239,6 @@ class LLVMIRVisitor extends TreeVisitor { return b; } - createLoad(ty, value, name) { - let rv = ir.createLoad(ty, value, name); - return rv; - } - createEjsValueLoad(value, name) { let rv = ir.createLoad(types.EjsValue, value, name); rv.setAlignment(8); @@ -474,87 +345,6 @@ class LLVMIRVisitor extends TreeVisitor { return ir.createStore(c, alloca_as_double, name); } - storeBoolean(alloca, jsbool, name) { - let alloca_as_int64 = ir.createBitCast( - alloca, - types.Int64.pointerTo(), - "alloca_as_pointer" - ); - if (this.triple.pointerSize() === 64) - return ir.createStore( - consts.int64_lowhi(0xfff98000, jsbool ? 0x00000001 : 0x000000000), - alloca_as_int64, - name - ); - else - return ir.createStore( - consts.int64_lowhi(0xffffff83, jsbool ? 0x00000001 : 0x000000000), - alloca_as_int64, - name - ); - } - - storeToDest(dest, arg, name = "") { - if (!arg) arg = { type: b.Literal, value: null }; - - if (arg.type === b.Literal) { - if (arg.value === null) return this.storeNull(dest, name); - - if (arg.value === undefined) return this.storeUndefined(dest, name); - - if (typeof arg.value === "number") return this.storeDouble(dest, arg.value, name); - - if (typeof arg.value === "boolean") return this.storeBoolean(dest, arg.value, name); - - // if typeof arg is 'string' - let val = this.visit(arg); - return ir.createStore(val, dest, name); - } else { - let val = this.visit(arg); - return ir.createStore(val, dest, name); - } - } - - storeGlobal(prop, value) { - let gname; - // we store obj.prop, prop is an id - if (prop.type === b.Identifier) gname = prop.name; // prop.type is b.Literal - else gname = prop.value; - - let c = this.getAtom(gname); - - debug.log(() => `createPropertyStore %global[${gname}]`); - - return this.createCall( - this.ejs_runtime.global_setprop, - [c, value], - `globalpropstore_${gname}` - ); - } - - loadGlobal(prop) { - let gname = prop.name; - - if (this.options.frozen_global) - return ir.createLoad(types.EjsValue, this.ejs_globals[prop.name], `load-${gname}`); - - let pname = this.getAtom(gname); - return this.createCall(this.ejs_runtime.global_getprop, [pname], `globalloadprop_${gname}`); - } - - visitWithScope(scope, children) { - this.scope_stack.push(scope); - for (let child of children) this.visit(child); - this.scope_stack.pop(); - } - - findIdentifierInScope(ident) { - for (let scope of this.scope_stack.stack) { - if (scope.has(ident)) return scope.get(ident); - } - return null; - } - createAlloca(func, type, name) { let saved_insert_point = ir.getInsertBlock(); ir.setInsertPointStartBB(func.entry_bb); @@ -570,2573 +360,208 @@ class LLVMIRVisitor extends TreeVisitor { return alloca; } - createAllocas(func, ids, scope) { - let allocas = []; - let new_allocas = []; - - // the allocas are always allocated in the function entry_bb so the mem2reg opt pass can regenerate the ssa form for us - let saved_insert_point = ir.getInsertBlock(); - ir.setInsertPointStartBB(func.entry_bb); + emitEIRToplevel(n) { + let insertBlock = ir.getInsertBlock(); - let j = 0; - for (let i = 0, e = ids.length; i < e; i++) { - let name = ids[i].id.name; - if (!scope.has(name)) { - allocas[j] = ir.createAlloca(types.EjsValue, `local_${name}`); - allocas[j].setAlignment(8); - scope.set(name, allocas[j]); - new_allocas[j] = true; - } else { - allocas[j] = scope.get(name); - new_allocas[j] = false; - } - j = j + 1; + if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); + if (!this.eir_emitted) this.eir_emitted = new Map(); + let eir_fns = this.eir_emitted.get(n.eir_module); + if (!eir_fns) { + eir_fns = this.eir_emitter.emitModule(n.eir_module); + this.eir_emitted.set(n.eir_module, eir_fns); } + // export accessors resolve by name against this map (see + // emitModuleResolution) + this.eir_toplevel_fns = eir_fns; + let target = eir_fns.get(n.eir_main); - // reinstate the IRBuilder to its previous insert point so we can insert the actual initializations - ir.setInsertPoint(saved_insert_point); - - return { allocas: allocas, new_allocas: new_allocas }; - } - - createPropertyStore(obj, prop, rhs, computed) { - if (computed) { - // we store obj[prop], prop can be any value - return this.createCall( - this.ejs_runtime.object_setprop, - [obj, this.visit(prop), rhs], - "propstore_computed" - ); - } else { - var pname; - - // we store obj.prop, prop is an id - if (prop.type === b.Identifier) pname = prop.name; // prop.type is b.Literal - else pname = prop.value; + let ir_func = n.ir_func; + this.currentFunction = ir_func; + let entry_bb = new llvm.BasicBlock("entry", ir_func); + ir_func.entry_bb = entry_bb; // cached-literal helpers want this + ir_func.literalAllocas = Object.create(null); + ir_func.topScope = new Map(); - let c = this.getAtom(pname); + let body_bb = new llvm.BasicBlock("body", ir_func); + ir.setInsertPoint(body_bb); + let args = ir_func.args; + let rv = this.abi.createCall( + ir_func, + target.type, + target, + [args[0], args[1], args[2], args[3], args[4]], + "eir_toplevel_result" + ); + this.abi.createRet(ir_func, rv); - debug.log(() => `createPropertyStore ${obj}[${pname}]`); + // emitModuleResolution wires resolve_modules_bb -> body_bb. the + // entry block's branch is emitted THERE, at the very end: the + // cached-literal helpers append their initializing stores to + // entry_bb, and nothing may follow a terminator. + this.resolve_modules_bb = new llvm.BasicBlock("resolve_modules", ir_func); + this.toplevel_body_bb = body_bb; + this.toplevel_function = ir_func; + this.eir_toplevel_entry_bb = entry_bb; - return this.createCall( - this.ejs_runtime.object_setprop, - [obj, c, rhs], - `propstore_${pname}` - ); - } + this.currentFunction = null; + if (insertBlock) ir.setInsertPoint(insertBlock); + return ir_func; } - createPropertyLoad(obj, prop, computed, canThrow = true) { - if (computed) { - // we load obj[prop], prop can be any value - let loadprop = this.visit(prop); - - if (this.options.record_types) - this.createCall( - this.ejs_runtime.record_getprop, - [consts.int32(this.genRecordId()), obj, loadprop], - "" - ); - - return this.createCall( - this.ejs_runtime.object_getprop, - [obj, loadprop], - "getprop_computed", - canThrow - ); - } else { - // we load obj.prop, prop is an id - let pname = this.getAtom(prop.name); - - if (this.options.record_types) - this.createCall( - this.ejs_runtime.record_getprop, - [consts.int32(this.genRecordId()), obj, pname], - "" - ); - - return this.createCall( - this.ejs_runtime.object_getprop, - [obj, pname], - `getprop_${prop.name}`, - canThrow - ); - } + // an EIR-owned function: emit its EIR module (once) and fill this + // function's body with a forwarding call. closure creation and env + // plumbing stay entirely on the legacy side; the thunk just hands the + // builtin arguments through. + createRet(x) { + //this.createCall this.ejs_runtime.log, [consts.string(ir, `leaving ${this.currentFunction.name}`)], '' + return this.abi.createRet(this.currentFunction, x); } - setDebugLoc(ast_node) { - if (!this.options.debug) return; - if (!ast_node || !ast_node.loc) return; - if (!this.currentFunction) return; - if (!this.currentFunction.debug_info) return; - - ir.setCurrentDebugLocation( - llvm.DebugLoc.get( - ast_node.loc.start.line, - ast_node.loc.start.column, - this.currentFunction.debug_info - ) + generateUCS2(id, jsstr) { + let ucsArrayType = llvm.ArrayType.get(types.JSChar, jsstr.length + 1); + let array_data = []; + for (let i = 0, e = jsstr.length; i < e; i++) + array_data.push(consts.jschar(jsstr.charCodeAt(i))); + array_data.push(consts.jschar(0)); + let array = llvm.ConstantArray.get(ucsArrayType, array_data); + let arrayglobal = new llvm.GlobalVariable( + this.module, + ucsArrayType, + `ucs2-${id}`, + array, + false ); + arrayglobal.setAlignment(8); + return arrayglobal; } - visit(n) { - this.setDebugLoc(n); - return super.visit(n); - } - - visitOrNull(n) { - return this.visit(n) || this.loadNullEjsValue(); - } - visitOrUndefined(n) { - return this.visit(n) || this.loadUndefinedEjsValue(); + generateEJSPrimString(id) { + let strglobal = new llvm.GlobalVariable( + this.module, + types.EjsPrimString, + `primstring-${id}`, + llvm.Constant.getAggregateZero(types.EjsPrimString), + false + ); + strglobal.setAlignment(8); + return strglobal; } - visitProgram(n) { - // by the time we make it here the program has been - // transformed so that there is nothing at the toplevel - // but function declarations. - for (let func of n.body) this.visit(func); + generateEJSValueForString(id) { + let name = `ejsval-${id}`; + let strglobal = new llvm.GlobalVariable( + this.module, + types.EjsValue, + name, + llvm.Constant.getAggregateZero(types.EjsValue), + false + ); + strglobal.setAlignment(8); + let val = this.module.getOrInsertGlobal(name, types.EjsValue); + val.setAlignment(8); + return val; } - visitBlock(n) { - let new_scope = new Map(); - - let iife_dest_bb = null; - let iife_rv = null; + addStringLiteralInitialization(name, ucs2, primstr, val, len) { + let saved_insert_point = ir.getInsertBlock(); - if (n.fromIIFE) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; + ir.setInsertPointStartBB(this.literalInitializationBB); - iife_dest_bb = new llvm.BasicBlock("iife_dest", insertFunc); - iife_rv = n.ejs_iife_rv; + let saved_debug_loc; + if (this.options.debug) { + saved_debug_loc = ir.getCurrentDebugLocation(); + ir.setCurrentDebugLocation( + llvm.DebugLoc.get(0, 0, this.literalInitializationDebugInfo) + ); } - this.iifeStack.push({ iife_rv, iife_dest_bb }); + let strname = consts.string(ir, name); - this.visitWithScope(new_scope, n.body); + let arg0 = strname; + let arg1 = val; + let arg2 = primstr; + let arg3 = ir.createInBoundsGetElementPointer( + types.JSChar.pointerTo(), + ucs2, + [consts.int32(0), consts.int32(0)], + "ucs2" + ); - this.iifeStack.pop(); - if (iife_dest_bb) { - ir.createBr(iife_dest_bb); - ir.setInsertPoint(iife_dest_bb); - let rv = this.createEjsValueLoad( - this.findIdentifierInScope(iife_rv.name), - "%iife_rv_load" - ); - return rv; - } else { - return n; - } + ir.createCall( + this.ejs_runtime.init_string_literal.type, + this.ejs_runtime.init_string_literal, + [arg0, arg1, arg2, arg3, consts.int32(len)], + "" + ); + ir.setInsertPoint(saved_insert_point); + if (this.options.debug) ir.setCurrentDebugLocation(saved_debug_loc); } - visitSwitch(n) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - // find the default: case first - let defaultCase = null; - for (let _case of n.cases) { - if (!_case.test) { - defaultCase = _case; - break; - } - } + getAtom(str) { + // check if it's an atom (a runtime library constant) first of all + if (hasOwn.call(this.ejs_atoms, str)) + return this.createEjsValueLoad(this.ejs_atoms[str], `${str}_atom_load`); - // for each case, create 2 basic blocks - for (let _case of n.cases) { - _case.bb = new llvm.BasicBlock("case_bb", insertFunc); - if (_case !== defaultCase) - _case.dest_check = new llvm.BasicBlock("case_dest_check_bb", insertFunc); + // if it's not, we create a constant and embed it in this module + if (!this.module_atoms.has(str)) { + let literalId = this.idgen(); + let ucs2_data = this.generateUCS2(literalId, str); + let primstring = this.generateEJSPrimString(literalId, str.length); + let ejsval = this.generateEJSValueForString(str); + this.module_atoms.set(str, ejsval); + this.addStringLiteralInitialization(str, ucs2_data, primstring, ejsval, str.length); } - let merge_bb = new llvm.BasicBlock("switch_merge", insertFunc); + return this.createEjsValueLoad(this.module_atoms.get(str), "literal_load"); + } - let discr = this.visit(n.discriminant); + createCall(callee, argv, callname) { + // the module scaffolding this visitor still emits never runs + // inside a protected region; EIR-emitted code manages its own + // invoke/landingpad pairs (see eir/emit.js) + return this.abi.createCall(this.currentFunction, callee.type, callee, argv, callname); + } - let case_checks = []; - for (let _case of n.cases) { - if (defaultCase !== _case) - case_checks.push({ - test: _case.test, - dest_check: _case.dest_check, - body: _case.bb, - }); + emitEjsvalFromPtr(ptr, prefix) { + if (this.triple.pointerSize() === 64) { + let fromptr_alloca = this.createAlloca( + this.currentFunction, + types.EjsValue, + `${prefix}_ejsval` + ); + let intval = ir.createPtrToInt(ptr, types.Int64, `${prefix}_intval`); + let payload = ir.createOr( + intval, + consts.int64_lowhi(0xfffc0000, 0x00000000), + `${prefix}_payload` + ); + let alloca_as_int64 = ir.createBitCast( + fromptr_alloca, + types.Int64.pointerTo(), + `${prefix}_alloca_asptr` + ); + ir.createStore(payload, alloca_as_int64, `${prefix}_store`); + return ir.createLoad(types.EjsValue, fromptr_alloca, `${prefix}_load`); + } else { + throw new Error("emitEjsvalTo not implemented for this case"); } + } - case_checks.push({ - dest_check: defaultCase ? defaultCase.bb : merge_bb, - }); - - this.doInsideExitableScope(new SwitchExitableScope(merge_bb), () => { - // insert all the code for the tests - ir.createBr(case_checks[0].dest_check); - ir.setInsertPoint(case_checks[0].dest_check); - for (let casenum = 0; casenum < case_checks.length - 1; casenum++) { - let test = this.visit(case_checks[casenum].test); - let eqop = this.ejs_binops["==="]; - - this.setDebugLoc(test); - let discTest = this.createCall(eqop, [discr, test], "test", !eqop.doesNotThrow); - - let disc_cmp, disc_truthy; - - if (discTest._ejs_returns_ejsval_bool) { - disc_cmp = this.createEjsvalICmpEq( - discTest, - consts.ejsval_false(this.triple.pointerSize() === 32) - ); - } else { - disc_truthy = this.createCall( - this.ejs_runtime.truthy, - [discTest], - "disc_truthy" - ); - disc_cmp = ir.createICmpEq(disc_truthy, consts.False(), "disccmpresult"); - } - ir.createCondBr( - disc_cmp, - case_checks[casenum + 1].dest_check, - case_checks[casenum].body - ); - ir.setInsertPoint(case_checks[casenum + 1].dest_check); - } + getEjsvalBits(arg) { + let bits_alloca; - let case_bodies = []; + if (this.currentFunction.bits_alloca) bits_alloca = this.currentFunction.bits_alloca; + else bits_alloca = this.createAlloca(this.currentFunction, types.EjsValue, "bits_alloca"); - // now insert all the code for the case consequents - for (let _case of n.cases) - case_bodies.push({ - bb: _case.bb, - consequent: _case.consequent, - }); + ir.createStore(arg, bits_alloca); + let bits_ptr = ir.createBitCast(bits_alloca, types.Int64.pointerTo(), "bits_ptr"); + if (!this.currentFunction.bits_alloca) this.currentFunction.bits_alloca = bits_alloca; + return ir.createLoad(types.Int64, bits_ptr, "bits_load"); + } - case_bodies.push({ bb: merge_bb }); - - for (let casenum = 0; casenum < case_bodies.length - 1; casenum++) { - ir.setInsertPoint(case_bodies[casenum].bb); - case_bodies[casenum].consequent.forEach((consequent) => { - this.visit(consequent); - }); - - ir.createBr(case_bodies[casenum + 1].bb); - } - - ir.setInsertPoint(merge_bb); - }); - - return merge_bb; - } - - visitCase() { - throw new Error("we shouldn't get here, case statements are handled in visitSwitch"); - } - - visitLabeledStatement(n) { - if ( - n.body.type === b.ForInStatement || - n.body.type === b.ForStatement || - n.body.type === b.ForOfStatement || - n.body.type === b.DoWhileStatement || - n.body.type === b.WhileStatement - ) { - // loops are handled by the individual loop statement visit functions - n.body.label = n.label.name; - return this.visit(n.body); - } - - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let labeled_bb = new llvm.BasicBlock("labeled_bb", insertFunc); - let merge_bb = new llvm.BasicBlock("labeled_merge_bb", insertFunc); - - ir.createBr(labeled_bb); - - this.doInsideExitableScope( - new LabeledStatementExitableScope(n.label.name, merge_bb), - () => { - this.doInsideBBlock(labeled_bb, () => { - this.visit(n.body); - ir.createBr(merge_bb); - }); - } - ); - - ir.setInsertPoint(merge_bb); - return merge_bb; - } - - visitBreak(n) { - return ExitableScope.scopeStack.exitAft(true, n.label && n.label.name); - } - - visitContinue(n) { - // the label must ride along: when an intervening finally - // intercepts (findLabeledOrFinally returns the TRY scope), its - // exitFore re-dispatches — without the label it continued the - // INNERMOST loop instead of the labeled one - if (n.label && n.label.name) - return LoopExitableScope.findLabeledOrFinally(n.label.name).exitFore(n.label.name); - else return LoopExitableScope.findLoopOrFinally().exitFore(); - } - - generateCondBr(exp, then_bb, else_bb) { - let cmp, exp_value; - if (exp.type === b.Literal && typeof exp.value === "boolean") { - cmp = consts.int1(exp.value ? 0 : 1); // we check for false below, so the then/else branches get swapped - } else { - exp_value = this.visit(exp); - if (exp_value._ejs_returns_ejsval_bool) { - cmp = this.createEjsvalICmpEq( - exp_value, - consts.ejsval_false(this.triple.pointerSize() === 32), - "cmpresult" - ); - } else if (exp_value._ejs_returns_native_bool) { - cmp = ir.createSelect(exp_value, consts.int1(0), consts.int1(1), "invert_check"); - } else { - let cond_truthy = this.createCall( - this.ejs_runtime.truthy, - [exp_value], - "cond_truthy" - ); - cmp = ir.createICmpEq(cond_truthy, consts.False(), "cmpresult"); - } - } - ir.createCondBr(cmp, else_bb, then_bb); - return exp_value; - } - - visitFor(n) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let init_bb = new llvm.BasicBlock("for_init", insertFunc); - let test_bb = new llvm.BasicBlock("for_test", insertFunc); - let body_bb = new llvm.BasicBlock("for_body", insertFunc); - let update_bb = new llvm.BasicBlock("for_update", insertFunc); - let merge_bb = new llvm.BasicBlock("for_merge", insertFunc); - - ir.createBr(init_bb); - - this.doInsideBBlock(init_bb, () => { - this.visit(n.init); - ir.createBr(test_bb); - }); - - this.doInsideBBlock(test_bb, () => { - if (n.test) this.generateCondBr(n.test, body_bb, merge_bb); - else ir.createBr(body_bb); - }); - - this.doInsideExitableScope(new LoopExitableScope(n.label, update_bb, merge_bb), () => { - this.doInsideBBlock(body_bb, () => { - this.visit(n.body); - ir.createBr(update_bb); - }); - - this.doInsideBBlock(update_bb, () => { - this.visit(n.update); - ir.createBr(test_bb); - }); - }); - - ir.setInsertPoint(merge_bb); - return merge_bb; - } - - visitDo(n) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let body_bb = new llvm.BasicBlock("do_body", insertFunc); - let test_bb = new llvm.BasicBlock("do_test", insertFunc); - let merge_bb = new llvm.BasicBlock("do_merge", insertFunc); - - ir.createBr(body_bb); - - this.doInsideExitableScope(new LoopExitableScope(n.label, test_bb, merge_bb), () => { - this.doInsideBBlock(body_bb, () => { - this.visit(n.body); - ir.createBr(test_bb); - }); - this.doInsideBBlock(test_bb, () => { - this.generateCondBr(n.test, body_bb, merge_bb); - }); - }); - - ir.setInsertPoint(merge_bb); - return merge_bb; - } - - visitWhile(n) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let while_bb = new llvm.BasicBlock("while_start", insertFunc); - let body_bb = new llvm.BasicBlock("while_body", insertFunc); - let merge_bb = new llvm.BasicBlock("while_merge", insertFunc); - - ir.createBr(while_bb); - - this.doInsideBBlock(while_bb, () => { - this.generateCondBr(n.test, body_bb, merge_bb); - }); - - this.doInsideExitableScope(new LoopExitableScope(n.label, while_bb, merge_bb), () => { - this.doInsideBBlock(body_bb, () => { - this.visit(n.body); - ir.createBr(while_bb); - }); - }); - - ir.setInsertPoint(merge_bb); - return merge_bb; - } - - visitForIn(n) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let iterator = this.createCall( - this.ejs_runtime.prop_iterator_new, - [this.visit(n.right)], - "iterator" - ); - - let lhs; - // make sure we get an alloca if there's a 'var' - if (n.left[0]) { - this.visit(n.left); - lhs = n.left[0].declarations[0].id; - } else { - lhs = n.left; - } - - let forin_bb = new llvm.BasicBlock("forin_start", insertFunc); - let body_bb = new llvm.BasicBlock("forin_body", insertFunc); - let merge_bb = new llvm.BasicBlock("forin_merge", insertFunc); - - ir.createBr(forin_bb); - - this.doInsideExitableScope(new LoopExitableScope(n.label, forin_bb, merge_bb), () => { - // forin_bb: - // moreleft = prop_iterator_next (iterator, true) - // if moreleft === false - // goto merge_bb - // else - // goto body_bb - // - this.doInsideBBlock(forin_bb, () => { - let moreleft = this.createCall( - this.ejs_runtime.prop_iterator_next, - [iterator, consts.True()], - "moreleft" - ); - let cmp = ir.createICmpEq(moreleft, consts.False(), "cmpmoreleft"); - ir.createCondBr(cmp, merge_bb, body_bb); - }); - - // body_bb: - // current = prop_iteratorcurrent (iterator) - // *lhs = current - // - // goto forin_bb - this.doInsideBBlock(body_bb, () => { - let current = this.createCall( - this.ejs_runtime.prop_iterator_current, - [iterator], - "iterator_current" - ); - this.storeValueInDest(current, lhs); - this.visit(n.body); - ir.createBr(forin_bb); - }); - }); - - // merge_bb: - // - ir.setInsertPoint(merge_bb); - return merge_bb; - } - - visitForOf() { - throw new Error( - "internal compiler error. for..of statements should have been transformed away by this point." - ); - } - - visitUpdateExpression(n) { - let result = this.createAlloca(this.currentFunction, types.EjsValue, "%update_result"); - let argument = this.visit(n.argument); - - let one = this.loadDoubleEjsValue(1); - - if (!n.prefix) { - // postfix updates store the argument before the op - ir.createStore(argument, result); - } - - // argument = argument $op 1 - let update_op = this.ejs_binops[n.operator === "++" ? "+" : "-"]; - let temp = this.createCall( - update_op, - [argument, one], - "update_temp", - !update_op.doesNotThrow - ); - - this.storeValueInDest(temp, n.argument); - - // return result - if (n.prefix) { - argument = this.visit(n.argument); - // prefix updates store the argument after the op - ir.createStore(argument, result); - } - return this.createEjsValueLoad(result, "%update_result_load"); - } - - visitConditionalExpression(n) { - return this.visitIfOrCondExp(n, true); - } - - visitIf(n) { - return this.visitIfOrCondExp(n, false); - } - - visitIfOrCondExp(n, load_result) { - let cond_val; - - if (load_result) - cond_val = this.createAlloca(this.currentFunction, types.EjsValue, "%cond_val"); - - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let then_bb = new llvm.BasicBlock("then", insertFunc); - let else_bb; - if (n.alternate) else_bb = new llvm.BasicBlock("else", insertFunc); - let merge_bb = new llvm.BasicBlock("merge", insertFunc); - - this.generateCondBr(n.test, then_bb, else_bb ? else_bb : merge_bb); - - this.doInsideBBlock(then_bb, () => { - let then_val = this.visit(n.consequent); - if (load_result) ir.createStore(then_val, cond_val); - ir.createBr(merge_bb); - }); - - if (n.alternate) { - this.doInsideBBlock(else_bb, () => { - let else_val = this.visit(n.alternate); - if (load_result) ir.createStore(else_val, cond_val); - ir.createBr(merge_bb); - }); - } - - ir.setInsertPoint(merge_bb); - if (load_result) return this.createEjsValueLoad(cond_val, "cond_val_load"); - else return merge_bb; - } - - visitReturn(n) { - if (this.iifeStack.top.iife_rv) { - // if we're inside an IIFE, convert the return statement into a store to the iife_rv alloca + a branch to the iife's dest bb - if (n.argument) - ir.createStore( - this.visit(n.argument), - this.findIdentifierInScope(this.iifeStack.top.iife_rv.name) - ); - ir.createBr(this.iifeStack.top.iife_dest_bb); - } else { - // otherwise generate an llvm IR ret - let rv = this.visitOrUndefined(n.argument); - - if (this.finallyStack.length > 0) { - if (!this.currentFunction.returnValueAlloca) - this.currentFunction.returnValueAlloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "returnValue" - ); - ir.createStore(rv, this.currentFunction.returnValueAlloca); - ir.createStore( - consts.int32(ExitableScope.REASON_RETURN), - this.currentFunction.cleanup_reason - ); - ir.createBr(this.finallyStack[0]); - } else { - let return_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "return_alloca" - ); - ir.createStore(rv, return_alloca); - - this.createRet(this.createEjsValueLoad(return_alloca, "return_load")); - } - } - } - - visitVariableDeclaration(n) { - if (n.kind === "var") - throw new Error( - "internal compiler error. var declarations should have been transformed to lets by this point." - ); - - let scope = this.scope_stack.top; - - let { allocas, new_allocas } = this.createAllocas( - this.currentFunction, - n.declarations, - scope - ); - for (let i = 0, e = n.declarations.length; i < e; i++) { - if (!n.declarations[i].init) { - // there was not an initializer. we only store undefined - // if the alloca is newly allocated. - if (new_allocas[i]) { - let initializer = this.visitOrUndefined(n.declarations[i].init); - ir.createStore(initializer, allocas[i]); - } - } else { - let initializer = this.visitOrUndefined(n.declarations[i].init); - ir.createStore(initializer, allocas[i]); - } - } - } - - visitMemberExpression(n) { - return this.createPropertyLoad(this.visit(n.object), n.property, n.computed); - } - - storeValueInDest(rhvalue, lhs) { - if (lhs.type === b.Identifier) { - let dest = this.findIdentifierInScope(lhs.name); - let result; - if (dest) result = ir.createStore(rhvalue, dest); - else result = this.storeGlobal(lhs, rhvalue); - return result; - } else if (lhs.type === b.MemberExpression) { - return this.createPropertyStore( - this.visit(lhs.object), - lhs.property, - rhvalue, - lhs.computed - ); - } else if (is_intrinsic(lhs, "%slot")) { - return ir.createStore(rhvalue, this.handleSlotRef(lhs)); - } else if (is_intrinsic(lhs, "%getLocal")) { - return ir.createStore(rhvalue, this.findIdentifierInScope(lhs.arguments[0].name)); - } else if (is_intrinsic(lhs, "%getGlobal")) { - let gname = lhs.arguments[0].name; - - return this.createCall( - this.ejs_runtime.global_setprop, - [this.getAtom(gname), rhvalue], - `globalpropstore_${lhs.arguments[0].name}` - ); - } else if (is_intrinsic(lhs, "%moduleGetSlot")) { - // a module-slot-bound variable as a store destination (e.g. a - // for-in/for-of loop variable): store through the slot ref - return ir.createStore( - rhvalue, - this.handleModuleSlotRef(lhs, this.opencode_intrinsics.moduleSetSlot) - ); - } else { - throw new Error(`unhandled lhs ${escodegenerate(lhs)}`); - } - } - - visitAssignmentExpression(n) { - let lhs = n.left; - let rhs = n.right; - - let rhvalue = this.visit(rhs); - - if (n.operator.length === 2) - throw new Error( - `binary assignment operators '${n.operator}' should not exist at this point` - ); - - if (this.options.record_types) - this.createCall( - this.ejs_runtime.record_assignment, - [consts.int32(this.genRecordId()), rhvalue], - "" - ); - this.storeValueInDest(rhvalue, lhs); - - // we need to visit lhs after the store so that we load the value, but only if it's used - if (!n.result_not_used) return rhvalue; - } - - visitFunction(n) { - if (n.eir_module) return n.toplevel ? this.emitEIRToplevel(n) : this.emitEIRThunk(n); - - if (!n.toplevel) - debug.log( - () => - ` function ${n.ir_name} at ${this.filename}:${ - n.loc ? n.loc.start.line : "" - }` - ); - - // save off the insert point so we can get back to it after generating this function - let insertBlock = ir.getInsertBlock(); - - for (let param of n.formal_params) { - if (param.type !== b.Identifier) - throw new Error("formal parameters should only be identifiers by this point"); - } - - // XXX this methods needs to be augmented so that we can pass actual types (or the builtin args need - // to be reflected in jsllvm.cpp too). maybe we can pass the names to this method and it can do it all - // there? - - let ir_func = n.ir_func; - let ir_args = n.ir_func.args; - debug.log(""); - //debug.log -> `ir_func = ${ir_func}` - - //debug.log -> `param ${param.llvm_type} ${param.name}` for param in n.formal_params - - this.currentFunction = ir_func; - - // we need to do this here as well, since otherwise the allocas and stores we create below for our parameters - // could be accidentally attributed to the previous @currentFunction (the last location we set). - this.setDebugLoc(n); - - // Create a new basic block to start insertion into. - let entry_bb = new llvm.BasicBlock("entry", ir_func); - - ir.setInsertPoint(entry_bb); - - let new_scope = new Map(); - - // we save off the top scope and entry_bb of the function so that we can hoist vars there - ir_func.topScope = new_scope; - ir_func.entry_bb = entry_bb; - - ir_func.literalAllocas = Object.create(null); - - let allocas = []; - - // create allocas for the builtin args - for (let param of n.params) { - let alloca = ir.createAlloca(param.llvm_type, `local_${param.name}`); - alloca.setAlignment(8); - new_scope.set(param.name, alloca); - allocas.push(alloca); - } - - /* - // now create allocas for the formal parameters - let first_formal_index = allocas.length; - for (let param of n.formal_params) { - let alloca = this.createAlloca(this.currentFunction, types.EjsValue, `local_${param.name}`); - new_scope.set(param.name, alloca); - allocas.push(alloca); - } -*/ - - debug.log(() => { - allocas.map((alloca) => `alloca ${alloca}`).join("\n"); - }); - - // now store the arguments onto the stack - for (let i = 0, e = n.params.length; i < e; i++) { - var store = ir.createStore(ir_args[i], allocas[i]); - debug.log(() => `store ${store} *builtin`); - } - - let body_bb = new llvm.BasicBlock("body", ir_func); - ir.setInsertPoint(body_bb); - - //this.createCall this.ejs_runtime.log, [consts.string(ir, `entering ${n.ir_name}`)], '' - - this.iifeStack = new Stack(); - - this.finallyStack = []; - - this.visitWithScope(new_scope, [n.body]); - - // XXX more needed here - this lacks all sorts of control flow stuff. - // Finish off the function. - this.createRet(this.loadUndefinedEjsValue()); - - if (n.toplevel) { - this.resolve_modules_bb = new llvm.BasicBlock("resolve_modules", ir_func); - this.toplevel_body_bb = body_bb; - this.toplevel_function = ir_func; - - // branch to the resolve_modules_bb from our entry_bb, but only in the toplevel function - ir.setInsertPoint(entry_bb); - ir.createBr(this.resolve_modules_bb); - } else { - // branch to the body_bb from our entry_bb - ir.setInsertPoint(entry_bb); - ir.createBr(body_bb); - } - - this.currentFunction = null; - - ir.setInsertPoint(insertBlock); - - return ir_func; - } - - // an EIR-owned module toplevel: the legacy side keeps only the module - // scaffolding — the initialized-flag check, literal initialization, - // module registration, accessors and import resolution emitted by - // emitModuleResolution — and the body block forwards straight into the - // EIR-emitted toplevel function. - emitEIRToplevel(n) { - let insertBlock = ir.getInsertBlock(); - - if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); - if (!this.eir_emitted) this.eir_emitted = new Map(); - let eir_fns = this.eir_emitted.get(n.eir_module); - if (!eir_fns) { - eir_fns = this.eir_emitter.emitModule(n.eir_module); - this.eir_emitted.set(n.eir_module, eir_fns); - } - // export accessors resolve by name against this map (see - // emitModuleResolution) - this.eir_toplevel_fns = eir_fns; - let target = eir_fns.get(n.eir_main); - - let ir_func = n.ir_func; - this.currentFunction = ir_func; - let entry_bb = new llvm.BasicBlock("entry", ir_func); - ir_func.entry_bb = entry_bb; // cached-literal helpers want this - ir_func.literalAllocas = Object.create(null); - ir_func.topScope = new Map(); - - let body_bb = new llvm.BasicBlock("body", ir_func); - ir.setInsertPoint(body_bb); - let args = ir_func.args; - let rv = this.abi.createCall( - ir_func, - target.type, - target, - [args[0], args[1], args[2], args[3], args[4]], - "eir_toplevel_result" - ); - this.abi.createRet(ir_func, rv); - - // emitModuleResolution wires resolve_modules_bb -> body_bb. the - // entry block's branch is emitted THERE, at the very end: the - // cached-literal helpers append their initializing stores to - // entry_bb, and nothing may follow a terminator. - this.resolve_modules_bb = new llvm.BasicBlock("resolve_modules", ir_func); - this.toplevel_body_bb = body_bb; - this.toplevel_function = ir_func; - this.eir_toplevel_entry_bb = entry_bb; - - this.currentFunction = null; - if (insertBlock) ir.setInsertPoint(insertBlock); - return ir_func; - } - - // an EIR-owned function: emit its EIR module (once) and fill this - // function's body with a forwarding call. closure creation and env - // plumbing stay entirely on the legacy side; the thunk just hands the - // builtin arguments through. - emitEIRThunk(n) { - let insertBlock = ir.getInsertBlock(); - let saved_function = this.currentFunction; - - if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); - // candidates in one file share an EIR module; emit it exactly once - if (!this.eir_emitted) this.eir_emitted = new Map(); - let eir_fns = this.eir_emitted.get(n.eir_module); - if (!eir_fns) { - eir_fns = this.eir_emitter.emitModule(n.eir_module); - this.eir_emitted.set(n.eir_module, eir_fns); - } - let target = eir_fns.get(n.eir_main); - - let ir_func = n.ir_func; - this.currentFunction = ir_func; - let entry_bb = new llvm.BasicBlock("entry", ir_func); - ir.setInsertPoint(entry_bb); - - let args = ir_func.args; - let rv = this.abi.createCall( - ir_func, - target.type, - target, - [args[0], args[1], args[2], args[3], args[4]], - "eir_result" - ); - this.abi.createRet(ir_func, rv); - - this.currentFunction = saved_function; - if (insertBlock) ir.setInsertPoint(insertBlock); - return ir_func; - } - - createRet(x) { - //this.createCall this.ejs_runtime.log, [consts.string(ir, `leaving ${this.currentFunction.name}`)], '' - return this.abi.createRet(this.currentFunction, x); - } - - visitUnaryExpression(n) { - debug.log(() => `operator = '${n.operator}'`); - - let builtin = `unop${n.operator}`; - let callee = this.ejs_runtime[builtin]; - - if (n.operator === "delete") { - if (n.argument.type !== b.MemberExpression) throw "unhandled delete syntax"; - - // computed keys (`delete o[k]`) evaluate the key expression; - // the old fake-literal path read `.property.name` (undefined - // for anything computed) and deleted the wrong property - let prop; - if (n.argument.computed) { - prop = n.argument.property; - } else { - prop = { - type: b.Literal, - value: n.argument.property.name, - raw: `'${n.argument.property.name}'`, - }; - } - return this.createCall( - callee, - [this.visitOrNull(n.argument.object), this.visit(prop)], - "result" - ); - } else if (n.operator === "!") { - let arg_value = this.visitOrNull(n.argument); - if ( - this.opencode_intrinsics.unaryNot && - this.triple.pointerSize() === 64 && - arg_value._ejs_returns_ejsval_bool - ) { - let cmp = this.createEjsvalICmpEq( - arg_value, - consts.ejsval_true(false), - "cmpresult" - ); - return this.createEjsBoolSelect(cmp, true); - } else { - return this.createCall(callee, [arg_value], "result"); - } - } else { - if (!callee) { - throw new Error(`Internal error: unary operator '${n.operator}' not implemented`); - } - return this.createCall(callee, [this.visitOrNull(n.argument)], "result"); - } - } - - visitSequenceExpression(n) { - let rv = null; - for (let exp of n.expressions) rv = this.visit(exp); - return rv; - } - - visitBinaryExpression(n) { - debug.log(() => `operator = '${n.operator}'`); - let callee = this.ejs_binops[n.operator]; - - if (!callee) throw new Error(`Internal error: unhandled binary operator '${n.operator}'`); - - let left_visited = this.visit(n.left); - let right_visited = this.visit(n.right); - - if (this.options.record_types) - this.createCall( - this.ejs_runtime.record_binop, - [ - consts.int32(this.genRecordId()), - consts.string(ir, n.operator), - left_visited, - right_visited, - ], - "" - ); - - // call the actual runtime binaryop method - return this.createCall( - callee, - [left_visited, right_visited], - `result_${n.operator}`, - !callee.doesNotThrow - ); - } - - visitLogicalExpression(n) { - debug.log(() => `operator = '${n.operator}'`); - let result = this.createAlloca( - this.currentFunction, - types.EjsValue, - `result_${n.operator}` - ); - - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let left_bb = new llvm.BasicBlock("cond_left", insertFunc); - let right_bb = new llvm.BasicBlock("cond_right", insertFunc); - let merge_bb = new llvm.BasicBlock("cond_merge", insertFunc); - - // we invert the test here - check if the condition is false/0 - let left_visited = this.generateCondBr(n.left, left_bb, right_bb); - - this.doInsideBBlock(left_bb, () => { - // inside the else branch, left was truthy - if (n.operator === "||") - // for || we short circuit out here - ir.createStore(left_visited, result); - else if (n.operator === "&&") - // for && we evaluate the second and store it - ir.createStore(this.visit(n.right), result); - else throw "Internal error 99.1"; - ir.createBr(merge_bb); - }); - - this.doInsideBBlock(right_bb, () => { - // inside the then branch, left was falsy - if (n.operator === "||") - // for || we evaluate the second and store it - ir.createStore(this.visit(n.right), result); - else if (n.operator === "&&") - // for && we short circuit out here - ir.createStore(left_visited, result); - else throw "Internal error 99.1"; - ir.createBr(merge_bb); - }); - - ir.setInsertPoint(merge_bb); - return this.createEjsValueLoad(result, `result_${n.operator}_load`); - } - - visitArgsForCall(callee, pullThisFromArg0, args) { - args = args.slice(); - let argv = []; - - if (callee.takes_builtins) { - let thisArg, closure; - if (pullThisFromArg0 && args[0].type === b.MemberExpression) { - thisArg = this.visit(args[0].object); - closure = this.createPropertyLoad(thisArg, args[0].property, args[0].computed); - } else { - thisArg = this.loadUndefinedEjsValue(); - closure = this.visit(args[0]); - } - - let this_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "this_alloca" - ); - ir.createStore(thisArg, this_alloca, "this_alloca_store"); - - args.shift(); - - argv.push(closure); // %closure - argv.push(this_alloca); // %this - argv.push(consts.int32(args.length)); // %argc - - let args_length = args.length; - if (args_length > 0) { - const scratchAreaType = llvm.ArrayType.get( - types.EjsValue, - this.currentFunction.scratch_length - ); - - for (let i = 0; i < args_length; i++) { - args[i] = this.visitOrNull(args[i]); - } - for (let i = 0; i < args_length; i++) { - let gep = ir.createGetElementPointer( - scratchAreaType, - this.currentFunction.scratch_area, - [consts.int32(0), consts.int64(i)], - `arg_gep_${i}` - ); - ir.createStore(args[i], gep, `argv[${i}]-store`); - } - - let argsCast = ir.createGetElementPointer( - scratchAreaType, - this.currentFunction.scratch_area, - [consts.int32(0), consts.int64(0)], - "call_args_load" - ); - - argv.push(argsCast); - } else { - argv.push(consts.Null(types.EjsValue.pointerTo())); - } - - argv.push(this.loadUndefinedEjsValue()); // %newTarget = undefined - } else { - for (let a of args) argv.push(this.visitOrNull(a)); - } - - return argv; - } - - debugLog(str) { - if (this.options.debug_level > 0) - this.createCall(this.ejs_runtime.log, [consts.string(ir, str)], ""); - } - - visitArgsForConstruct(callee, args, this_loc, newTarget_loc) { - args = args.slice(); - let argv = []; - // constructors are always .takes_builtins, so we can skip the other case - // - - let ctor = this.visit(args[0]); - args.shift(); - - argv.push(ctor); // %closure - argv.push(this_loc); // %this - argv.push(consts.int32(args.length)); // %argc - - if (args.length > 0) { - const scratchAreaType = llvm.ArrayType.get( - types.EjsValue, - this.currentFunction.scratch_length - ); - let visited = []; - for (let a of args) visited.push(this.visitOrNull(a)); - - visited.forEach((a, i) => { - let gep = ir.createGetElementPointer( - scratchAreaType, - this.currentFunction.scratch_area, - [consts.int32(0), consts.int64(i)], - `arg_gep_${i}` - ); - ir.createStore(a, gep, `argv[${i}]-store`); - }); - - let argsCast = ir.createGetElementPointer( - scratchAreaType, - this.currentFunction.scratch_area, - [consts.int32(0), consts.int64(0)], - "call_args_load" - ); - argv.push(argsCast); - } else { - argv.push(consts.Null(types.EjsValue.pointerTo())); - } - - argv.push(newTarget_loc || ctor); // %newTarget = ctor - - return argv; - } - - visitCallExpression(n) { - debug.log(() => `visitCall ${JSON.stringify(n)}`); - debug.log(() => ` arguments length = ${n.arguments.length}`); - - debug.log(() => { - return n.arguments - .map((a, i) => ` arguments[${i}] = ${JSON.stringify(a)}`) - .join(""); - }); - - let unescapedName = n.callee.name.slice(1); - let intrinsicHandler = this.ejs_intrinsics[unescapedName]; - if (!intrinsicHandler) - throw new Error( - `Internal error: callee should not be null in visitCallExpression (callee = '${n.callee.name}', arguments = ${n.arguments.length})` - ); - - return intrinsicHandler.call(this, n, this.opencode_intrinsics[unescapedName]); - } - - visitThisExpression() { - debug.log("visitThisExpression"); - return this.createEjsValueLoad( - this.createLoad( - types.EjsValue.pointerTo(), - this.findIdentifierInScope("%this"), - "load_this_ptr" - ), - "load_this" - ); - } - - visitSpreadElement() { - throw new Error("halp"); - } - - visitIdentifier(n) { - let rv; - debug.log(() => `identifier ${n.name}`); - let val = n.name; - - let source = this.findIdentifierInScope(val); - if (source) { - debug.log(() => `found identifier in scope, at ${source}`); - rv = this.createEjsValueLoad(source, `load_${val}`); - return rv; - } - - // special handling of the arguments object here, so we - // only initialize/create it if the function is - // actually going to use it. - if (val === "arguments") { - let arguments_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "local_arguments_object" - ); - let saved_insert_point = ir.getInsertBlock(); - ir.setInsertPoint(this.currentFunction.entry_bb); - - let load_argc = this.createLoad( - types.Int32, - this.currentFunction.topScope.get("%argc"), - "argc_load" - ); - let load_args = this.createLoad( - types.EjsValue.pointerTo(), - this.currentFunction.topScope.get("%args"), - "args_load" - ); - - let args_new = this.ejs_runtime.arguments_new; - let arguments_object = this.createCall( - args_new, - [load_argc, load_args], - "argstmp", - !args_new.doesNotThrow - ); - ir.createStore(arguments_object, arguments_alloca); - this.currentFunction.topScope.set("arguments", arguments_alloca); - - ir.setInsertPoint(saved_insert_point); - return this.createEjsValueLoad(arguments_alloca, "load_arguments"); - } - - rv = null; - debug.log(() => `calling getFunction for ${val}`); - rv = this.module.getFunction(val); - - if (!rv) { - debug.log(() => `Symbol '${val}' not found in current scope`); - rv = this.loadGlobal(n); - } - - debug.log(() => `returning ${rv}`); - return rv; - } - - visitObjectExpression(n) { - let obj_proto = ir.createLoad( - types.EjsValue, - this.ejs_globals.Object_prototype, - "load_objproto" - ); - let object_create = this.ejs_runtime.object_create; - let obj = this.createCall( - object_create, - [obj_proto], - "objtmp", - !object_create.doesNotThrow - ); - - let accessor_map = new Map(); - - // gather all properties so we can emit get+set as a single call to - // define_accessor_prop. non-computed keys map by NAME: keying by - // the key AST node put a get/set pair in separate entries, and the - // second define_accessor_prop (with an undefined getter) clobbered - // the first. - let keyFor = (property) => - property.computed - ? property.key - : property.key.type === b.Identifier - ? property.key.name - : String(property.key.value); - - for (let property of n.properties) { - if (property.kind === "get" || property.kind === "set") { - if (!accessor_map.has(keyFor(property))) accessor_map.set(keyFor(property), new Map()); - if (accessor_map.get(keyFor(property)).has(property.kind)) - throw new SyntaxError( - `a '${property.kind}' method for '${escodegenerate( - property.key - )}' has already been defined.` - ); - if (accessor_map.get(keyFor(property)).has("init")) - throw new SyntaxError( - `${property.key.loc.start.line}: property name ${escodegenerate( - property.key - )} appears once in object literal.` - ); - } else if (property.kind === "init") { - if (accessor_map.get(keyFor(property))) - throw new SyntaxError( - `${property.key.loc.start.line}: property name ${escodegenerate( - property.key - )} appears once in object literal.` - ); - accessor_map.set(keyFor(property), new Map()); - } else { - throw new Error(`unrecognized property kind '${property.kind}'`); - } - - if (property.computed) { - accessor_map.get(keyFor(property)).set("computed", true); - } - accessor_map.get(keyFor(property)).set(property.kind, property); - } - - accessor_map.forEach((prop_map, propkey) => { - // XXX we need something like this line below to handle computed properties, but those are broken at the moment - //key = if property.key.type is Identifier then this.getAtom property.key.name else this.visit property.key - - if (prop_map.has("computed")) propkey = this.visit(propkey); - else propkey = this.getAtom(String(propkey)); // name-keyed - - if (prop_map.has("init")) { - let val = this.visit(prop_map.get("init").value); - this.createCall( - this.ejs_runtime.object_define_value_prop, - [obj, propkey, val, consts.int32(0x77)], - `define_value_prop_${propkey}` - ); - } else { - let getter = prop_map.get("get"); - let setter = prop_map.get("set"); - - let get_method = getter ? this.visit(getter.value) : this.loadUndefinedEjsValue(); - let set_method = setter ? this.visit(setter.value) : this.loadUndefinedEjsValue(); - - this.createCall( - this.ejs_runtime.object_define_accessor_prop, - [obj, propkey, get_method, set_method, consts.int32(0x19)], - `define_accessor_prop_${propkey}` - ); - } - }); - - return obj; - } - - visitArrayExpression(n) { - let force_fill = false; - // if there are holes, we need to fill the array at allocation time. - // FIXME(toshok) we could just as easily have the compiler emit code to initialize the holes as well, right? - for (let el of n.elements) { - if (el == null) { - force_fill = true; - break; - } - } - - let obj = this.createCall( - this.ejs_runtime.array_new, - [consts.int64(n.elements.length), consts.bool(force_fill)], - "arrtmp", - !this.ejs_runtime.array_new.doesNotThrow - ); - let i = 0; - for (let el of n.elements) { - // don't create property stores for array holes — but the index - // still advances past them (an element after a hole used to - // land at the hole's index) - if (el != null) { - let val = this.visit(el); - let index = { type: b.Literal, value: i }; - this.createPropertyStore(obj, index, val, true); - } - i = i + 1; - } - return obj; - } - - visitExpressionStatement(n) { - n.expression.result_not_used = true; - return this.visit(n.expression); - } - - generateUCS2(id, jsstr) { - let ucsArrayType = llvm.ArrayType.get(types.JSChar, jsstr.length + 1); - let array_data = []; - for (let i = 0, e = jsstr.length; i < e; i++) - array_data.push(consts.jschar(jsstr.charCodeAt(i))); - array_data.push(consts.jschar(0)); - let array = llvm.ConstantArray.get(ucsArrayType, array_data); - let arrayglobal = new llvm.GlobalVariable( - this.module, - ucsArrayType, - `ucs2-${id}`, - array, - false - ); - arrayglobal.setAlignment(8); - return arrayglobal; - } - - generateEJSPrimString(id) { - let strglobal = new llvm.GlobalVariable( - this.module, - types.EjsPrimString, - `primstring-${id}`, - llvm.Constant.getAggregateZero(types.EjsPrimString), - false - ); - strglobal.setAlignment(8); - return strglobal; - } - - generateEJSValueForString(id) { - let name = `ejsval-${id}`; - let strglobal = new llvm.GlobalVariable( - this.module, - types.EjsValue, - name, - llvm.Constant.getAggregateZero(types.EjsValue), - false - ); - strglobal.setAlignment(8); - let val = this.module.getOrInsertGlobal(name, types.EjsValue); - val.setAlignment(8); - return val; - } - - addStringLiteralInitialization(name, ucs2, primstr, val, len) { - let saved_insert_point = ir.getInsertBlock(); - - ir.setInsertPointStartBB(this.literalInitializationBB); - - let saved_debug_loc; - if (this.options.debug) { - saved_debug_loc = ir.getCurrentDebugLocation(); - ir.setCurrentDebugLocation( - llvm.DebugLoc.get(0, 0, this.literalInitializationDebugInfo) - ); - } - - let strname = consts.string(ir, name); - - let arg0 = strname; - let arg1 = val; - let arg2 = primstr; - let arg3 = ir.createInBoundsGetElementPointer( - types.JSChar.pointerTo(), - ucs2, - [consts.int32(0), consts.int32(0)], - "ucs2" - ); - - ir.createCall( - this.ejs_runtime.init_string_literal.type, - this.ejs_runtime.init_string_literal, - [arg0, arg1, arg2, arg3, consts.int32(len)], - "" - ); - ir.setInsertPoint(saved_insert_point); - if (this.options.debug) ir.setCurrentDebugLocation(saved_debug_loc); - } - - getAtom(str) { - // check if it's an atom (a runtime library constant) first of all - if (hasOwn.call(this.ejs_atoms, str)) - return this.createEjsValueLoad(this.ejs_atoms[str], `${str}_atom_load`); - - // if it's not, we create a constant and embed it in this module - if (!this.module_atoms.has(str)) { - let literalId = this.idgen(); - let ucs2_data = this.generateUCS2(literalId, str); - let primstring = this.generateEJSPrimString(literalId, str.length); - let ejsval = this.generateEJSValueForString(str); - this.module_atoms.set(str, ejsval); - this.addStringLiteralInitialization(str, ucs2_data, primstring, ejsval, str.length); - } - - return this.createEjsValueLoad(this.module_atoms.get(str), "literal_load"); - } - - visitLiteral(n) { - // null literals, load _ejs_null - if (n.value === null) { - debug.log("literal: null"); - return this.loadNullEjsValue(); - } - - // undefined literals, load _ejs_undefined - if (n.value === undefined) { - debug.log("literal: undefined"); - return this.loadUndefinedEjsValue(); - } - - // string literals - if (typeof n.raw === "string" && (n.raw[0] === "'" || n.raw[0] === '"')) { - debug.log(() => `literal string: ${n.value}`); - - var strload = this.getAtom(n.value); - - strload.literal = n; - debug.log(() => `strload = ${strload}`); - return strload; - } - - // regular expression literals - if (typeof n.raw === "string" && n.raw[0] === "/") { - debug.log(() => `literal regexp: ${n.raw}`); - - let source = consts.string(ir, n.value.source); - let flags = consts.string( - ir, - `${n.value.global ? "g" : ""}${n.value.multiline ? "m" : ""}${ - n.value.ignoreCase ? "i" : "" - }` - ); - - let regexp_new_utf8 = this.ejs_runtime.regexp_new_utf8; - var regexpcall = this.createCall( - regexp_new_utf8, - [source, flags], - "regexptmp", - !regexp_new_utf8.doesNotThrow - ); - debug.log(() => `regexpcall = ${regexpcall}`); - return regexpcall; - } - - // number literals - if (typeof n.value === "number") { - debug.log(() => `literal number: ${n.value}`); - return this.loadDoubleEjsValue(n.value); - } - - // boolean literals - if (typeof n.value === "boolean") { - debug.log(() => `literal boolean: ${n.value}`); - return this.loadBoolEjsValue(n.value); - } - - throw `Internal error: unrecognized literal of type ${typeof n.value}`; - } - - createCall(callee, argv, callname, canThrow = true) { - // if we're inside a try block we have to use createInvoke, and pass two basic blocks: - // the normal block, which is basically this IR instruction's continuation - // the unwind block, where we land if the call throws an exception. - // - // Although for builtins we know won't throw, we can still use createCall. - let calltmp; - if (TryExitableScope.unwindStack.depth === 0 || callee.doesNotThrow || !canThrow) { - //ir.createCall this.ejs_runtime.log, [consts.string(ir, `calling ${callee.name}`)], '' - calltmp = this.abi.createCall( - this.currentFunction, - callee.type, - callee, - argv, - callname - ); - } else { - let normal_block = new llvm.BasicBlock("normal", this.currentFunction); - //ir.createCall this.ejs_runtime.log, [consts.string(ir, `invoking ${callee.name}`)], '' - calltmp = this.abi.createInvoke( - this.currentFunction, - callee.type, - callee, - argv, - normal_block, - TryExitableScope.unwindStack.top.getLandingPadBlock(), - callname - ); - // after we've made our call we need to change the insertion point to our continuation - ir.setInsertPoint(normal_block); - } - return calltmp; - } - - visitThrow(n) { - let arg = this.visit(n.argument); - this.createCall(this.ejs_runtime.throw, [arg], "", true); - return ir.createUnreachable(); - } - - visitTry(n) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let finally_block = null; - let catch_block = null; - - // the alloca that stores the reason we ended up in the finally block - if (!this.currentFunction.cleanup_reason) - this.currentFunction.cleanup_reason = this.createAlloca( - this.currentFunction, - types.Int32, - "cleanup_reason" - ); - - // if we have a finally clause, create finally_block - if (n.finalizer) { - finally_block = new llvm.BasicBlock("finally_bb", insertFunc); - this.finallyStack.unshift(finally_block); - } - - // the merge bb where everything branches to after falling off the end of a catch/finally block - let merge_block = new llvm.BasicBlock("try_merge", insertFunc); - - let branch_target = finally_block ? finally_block : merge_block; - - let scope = new TryExitableScope( - this.currentFunction.cleanup_reason, - branch_target, - () => new llvm.BasicBlock("exception", insertFunc), - finally_block != null - ); - this.doInsideExitableScope(scope, () => { - scope.enterTry(); - this.visit(n.block); - - if (n.finalizer) this.finallyStack.shift(); - - // at the end of the try block branch to our branch_target (either the finally block or the merge block after the try{}) with REASON_FALLOFF - scope.exitAft(false); - scope.leaveTry(); - }); - - if (scope.landing_pad_block && n.handlers.length > 0) - catch_block = new llvm.BasicBlock("catch_bb", insertFunc); - - if (scope.landing_pad_block) { - // the scope's landingpad block is created if needed by this.createCall (using that function we pass in as the last argument to TryExitableScope's ctor.) - // if a try block includes no calls, there's no need for an landing pad block as nothing can throw, and we don't bother generating any code for the - // catch clause. - this.doInsideBBlock(scope.landing_pad_block, () => { - // XXX is it an error to have multiple catch handlers, as JS doesn't allow you to filter by type? - let clause_count = n.handlers.length > 0 ? 1 : 0; - - // XXX(llvm 3.8) - // let casted_personality = ir.createPointerCast(this.ejs_runtime.personality, types.Int8Pointer, 'personality'); - let caught_result = ir.createLandingPad( - types.EjsLandingPad, - clause_count, - "caught_result" - ); - caught_result.addClause( - ir.createPointerCast(this.ejs_runtime.exception_typeinfo, types.Int8Pointer, "") - ); - caught_result.setCleanup(true); - - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - if (!insertFunc.hasPersonality()) { - insertFunc.setPersonality( - ir.createPointerCast( - this.ejs_runtime.personality, - types.Int8Pointer, - "personality" - ) - ); - } - - let exception = ir.createExtractValue(caught_result, 0, "exception"); - - if (catch_block) ir.createBr(catch_block); - else if (finally_block) { - // finally-only try: run the finalizer, then RETHROW. - // (branching straight to the finalizer with a stale - // cleanup_reason silently swallowed the exception -- - // and DesugarLetLoopVars wraps every `for (let ...)` - // body in exactly this construct.) - if (!this.currentFunction.caught_exception_alloca) - this.currentFunction.caught_exception_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "caught_exception" - ); - let catchval = this.beginCatch(exception); - ir.createStore(catchval, this.currentFunction.caught_exception_alloca); - this.endCatch(); - ir.createStore( - consts.int32(TryExitableScope.REASON_EXCEPTION), - this.currentFunction.cleanup_reason - ); - ir.createBr(finally_block); - } else throw "this shouldn't happen. a try{} without either a catch{} or finally{}"; - - // if we have a catch clause, create catch_bb - if (n.handlers.length > 0) { - this.doInsideBBlock(catch_block, () => { - // call _ejs_begin_catch to return the actual exception - let catchval = this.beginCatch(exception); - - // create a new scope which maps the catch parameter name (the 'e' in 'try { } catch (e) { }') to catchval - let catch_scope = new Map(); - if (n.handlers[0].param && n.handlers[0].param.name) { - let catch_name = n.handlers[0].param.name; - let alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - `local_catch_${catch_name}` - ); - catch_scope.set(catch_name, alloca); - ir.createStore(catchval, alloca); - } - - if (n.finalizer) this.finallyStack.unshift(finally_block); - - this.doInsideExitableScope(scope, () => { - this.visitWithScope(catch_scope, [n.handlers[0]]); - }); - - // unsure about this one - we should likely call end_catch if another exception is thrown from the catch block? - this.endCatch(); - - if (n.finalizer) this.finallyStack.shift(); - - // at the end of the catch block branch to our branch_target (either the finally block or the merge block after the try{}) with REASON_FALLOFF - scope.exitAft(false); - }); - } - }); - } - - // Finally Block - if (n.finalizer) { - this.doInsideBBlock(finally_block, () => { - this.visit(n.finalizer); - - let cleanup_reason = this.createLoad( - types.Int32, - this.currentFunction.cleanup_reason, - "cleanup_reason_load" - ); - - let return_tramp = null; - if (this.currentFunction.returnValueAlloca) { - return_tramp = new llvm.BasicBlock("return_tramp", insertFunc); - this.doInsideBBlock(return_tramp, () => { - if (this.finallyStack.length > 0) { - ir.createStore( - consts.int32(ExitableScope.REASON_RETURN), - this.currentFunction.cleanup_reason - ); - ir.createBr(this.finallyStack[0]); - } else { - this.createRet( - this.createEjsValueLoad( - this.currentFunction.returnValueAlloca, - "rv" - ) - ); - } - }); - } - - let switch_stmt = ir.createSwitch( - cleanup_reason, - merge_block, - scope.destinations.length + 1 - ); - if (this.currentFunction.returnValueAlloca) - switch_stmt.addCase(consts.int32(ExitableScope.REASON_RETURN), return_tramp); - - let falloff_tramp = new llvm.BasicBlock("falloff_tramp", insertFunc); - this.doInsideBBlock(falloff_tramp, () => { - ir.createBr(merge_block); - }); - switch_stmt.addCase( - consts.int32(TryExitableScope.REASON_FALLOFF_TRY), - falloff_tramp - ); - - if (scope.landing_pad_block && !catch_block) { - // the exception remembered by the finally-only - // landingpad path above resumes here - let exception_tramp = new llvm.BasicBlock("exception_tramp", insertFunc); - this.doInsideBBlock(exception_tramp, () => { - let exc = this.createEjsValueLoad( - this.currentFunction.caught_exception_alloca, - "caught_exc" - ); - // a fresh _ejs_throw of the saved value: the original - // C++ exception ended at the begin/end_catch pair in - // the landingpad (_ejs_rethrow needs an ACTIVE - // exception and would terminate) - this.createCall(this.ejs_runtime.throw, [exc], "", true); - ir.createUnreachable(); - }); - switch_stmt.addCase( - consts.int32(TryExitableScope.REASON_EXCEPTION), - exception_tramp - ); - } - - for (let s = 0, e = scope.destinations.length; s < e; s++) { - let dest_tramp = new llvm.BasicBlock("dest_tramp", insertFunc); - var dest = scope.destinations[s]; - this.doInsideBBlock(dest_tramp, () => { - // relay the label: the destination may itself be a - // finally scope (nested finallies) that must keep - // routing toward the labeled loop - if (dest.reason == TryExitableScope.REASON_BREAK) - dest.scope.exitAft(true, dest.label); - else if (dest.reason == TryExitableScope.REASON_CONTINUE) - dest.scope.exitFore(dest.label); - }); - switch_stmt.addCase(dest.id, dest_tramp); - } - }); - } - - ir.setInsertPoint(merge_block); - } - - handleTemplateDefaultHandlerCall(exp) { - // we should probably only inline the construction of the string if substitutions.length < $some-number - let cooked_strings = exp.arguments[0].elements; - let substitutions = exp.arguments[1].elements; - - let cooked_i = 0; - let sub_i = 0; - let strval = null; - - let concat_string = (s) => { - if (!strval) strval = s; - else strval = this.createCall(this.ejs_runtime.string_concat, [strval, s], "strconcat"); - }; - - while (cooked_i < cooked_strings.length) { - let c = cooked_strings[cooked_i]; - cooked_i += 1; - if (c.length !== 0) concat_string(this.getAtom(c.value)); - if (sub_i < substitutions.length) { - let sub = this.visit(substitutions[sub_i]); - concat_string(this.createCall(this.ejs_runtime.ToString, [sub], "subToString")); - sub_i += 1; - } - } - - return strval; - } - - handleTemplateCallsite(exp) { - // we expect to be called with context something of the form: - // - // function generate_callsiteId0 () { - // %templateCallsite(%callsiteId_0, - // [], // raw - // [] // cooked - // }); - // } - // - // and we need to generate something along the lines of: - // - // global const %callsiteId_0 = null; // an llvm IR construct - // - // function generate_callsiteId0 () { - // if (!%callsiteId_0) { - // _ejs_gc_add_root(&%callsiteId_0); - // %callsiteId_0 = []; // cooked - // %callsiteId_0.raw = []; - // %callsiteId_0.freeze(); - // } - // return callsiteId_0; - // } - // - // our containing function already exists, so we just - // need to replace the intrinsic with the new contents. - // - // XXX there's no reason to dynamically create the - // callsite, other than it being easier for now. The - // callsite id's structure is known at compile time so - // everything could be allocated from the data segment - // and just used from there (much the same way we do - // with string literals.) - - let callsite_id = exp.arguments[0].value; - let callsite_raw_literal = exp.arguments[1]; - let callsite_cooked_literal = exp.arguments[2]; - - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - let then_bb = new llvm.BasicBlock("then", insertFunc); - let merge_bb = new llvm.BasicBlock("merge", insertFunc); - - let callsite_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - `local_${callsite_id}` - ); - - let callsite_global = new llvm.GlobalVariable( - this.module, - types.EjsValue, - callsite_id, - llvm.Constant.getAggregateZero(types.EjsValue), - false - ); - let global_callsite_load = this.createEjsValueLoad(callsite_global, "load_global_callsite"); - ir.createStore(global_callsite_load, callsite_alloca); - - let callsite_load = ir.createLoad(types.EjsValue, callsite_alloca, "load_local_callsite"); - - let isnull = this.isNumber(callsite_load); - ir.createCondBr(isnull, then_bb, merge_bb); - - this.doInsideBBlock(then_bb, () => { - this.createCall(this.ejs_runtime.gc_add_root, [callsite_global], ""); - // XXX missing: register callsite_obj gc root - let callsite_cooked = this.visit(callsite_cooked_literal); - let callsite_raw = this.visit(callsite_raw_literal); - - let frozen_raw = this.createCall( - this.ejs_runtime.object_freeze, - [callsite_raw], - "frozen_raw" - ); - - this.createCall( - this.ejs_runtime.object_setprop, - [callsite_cooked, this.visit(b.literal("raw")), frozen_raw], - "propstore_raw" - ); - - let frozen_cooked = this.createCall( - this.ejs_runtime.object_freeze, - [callsite_cooked], - "frozen_cooked" - ); - ir.createStore(frozen_cooked, callsite_global); - ir.createStore(frozen_cooked, callsite_alloca); - ir.createBr(merge_bb); - }); - - ir.setInsertPoint(merge_bb); - return this.createRet( - ir.createLoad(types.EjsValue, callsite_alloca, "load_local_callsite") - ); - } - - handleModuleGet(exp) { - let moduleString = this.visit(exp.arguments[0].value); - return this.createCall(this.ejs_runtime.module_get, [moduleString], "moduletmp"); - } - - handleModuleSlotRef(exp, opencode) { - let moduleString = exp.arguments[0].value; - let exportId = exp.arguments[1].value; - let module_global; - - if (moduleString.endsWith(".js")) - moduleString = moduleString.substring(0, moduleString.length - 3); - if (moduleString === this.this_module_info.path) { - module_global = this.this_module_global; - } else { - module_global = this.import_module_globals.get(moduleString); - } - module_global = ir.createPointerCast(module_global, types.EjsModule.pointerTo(), ""); - - let slotnum = this.allModules.get(moduleString).exports.get(exportId).slot_num; - - if (opencode && this.triple.pointerSize() === 64) { - // must NOT be an inbounds gep: imported modules are declared - // with the generic EJSModule type whose exports array has - // length 1, so indexing slotnum > 0 through an inbounds gep is - // poison and newer llvm optimizers (16+) miscompile the load. - return ir.createGetElementPointer( - types.EjsModule, - module_global, - [consts.int64(0), consts.int32(3), consts.int64(slotnum)], - "slot_ref" - ); - } - - return this.createCall( - this.ejs_runtime.module_get_slot_ref, - [module_global, consts.int32(slotnum)], - "module_slot" - ); - } - - handleModuleGetSlot(exp, opencode) { - let slot_ref = this.handleModuleSlotRef(exp, opencode); - return ir.createLoad(types.EjsValue, slot_ref, "module_slot_load"); - } - - handleModuleSetSlot(exp, opencode) { - let arg = exp.arguments[2]; - - let slot_ref = this.handleModuleSlotRef(exp, opencode); - this.storeToDest(slot_ref, arg); - - return ir.createLoad(types.EjsValue, slot_ref, "load_slot"); // do we need this? we don't need to keep assignment expression semantics for this - } - - handleModuleGetExotic(exp) { - let moduleString = exp.arguments[0].value; - - if (this.opencode_intrinsics.moduleGetExotic) { - if (moduleString === this.this_module_info.path) { - let module_global = this.this_module_global; - return this.emitEjsvalFromPtr(module_global, "exotic"); - } else if (this.import_module_globals.has(moduleString)) { - let module_global = this.import_module_globals.get(moduleString); - return this.emitEjsvalFromPtr(module_global, "exotic"); - } - } - - // fallback for the opencoded version as well as the non-opencoded - // version. - return this.createCall( - this.ejs_runtime.module_get, - [this.visit(exp.arguments[0])], - "get_module_exotic" - ); - } - - handleGetNewTarget() { - return this.createEjsValueLoad(this.findIdentifierInScope("%newTarget"), "new_target_load"); - } - - handleGetArgumentsObject() { - let arguments_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "local_arguments_object" - ); - let saved_insert_point = ir.getInsertBlock(); - ir.setInsertPoint(this.currentFunction.entry_bb); - - let load_argc = this.createLoad( - types.Int32, - this.currentFunction.topScope.get("%argc"), - "argc_load" - ); - let load_args = this.createLoad( - types.EjsValue.pointerTo(), - this.currentFunction.topScope.get("%args"), - "args_load" - ); - - let args_new = this.ejs_runtime.arguments_new; - let arguments_object = this.createCall( - args_new, - [load_argc, load_args], - "argstmp", - !args_new.doesNotThrow - ); - ir.createStore(arguments_object, arguments_alloca); - this.currentFunction.topScope.set("arguments", arguments_alloca); - - ir.setInsertPoint(saved_insert_point); - return this.createEjsValueLoad(arguments_alloca, "load_arguments"); - } - - handleGetLocal(exp) { - return this.createEjsValueLoad( - this.findIdentifierInScope(exp.arguments[0].name), - `load_${exp.arguments[0].name}` - ); - } - handleGetGlobal(exp) { - return this.loadGlobal(exp.arguments[0]); - } - - handleSetLocal(exp) { - let dest = this.findIdentifierInScope(exp.arguments[0].name); - if (!dest) throw new Error(`identifier not found: ${exp.arguments[0].name}`); - let arg = exp.arguments[1]; - this.storeToDest(dest, arg); - return ir.createLoad(types.EjsValue, dest, "load_val"); - } - - handleSetGlobal(exp) { - let gname = exp.arguments[0].name; - - if (this.options.frozen_global) - throw new SyntaxError( - `cannot set global property '${exp.arguments[0].name}' when using --frozen-global` - ); - - let gatom = this.getAtom(gname); - let value = this.visit(exp.arguments[1]); - - return this.createCall( - this.ejs_runtime.global_setprop, - [gatom, value], - `globalpropstore_${gname}` - ); - } - - // this method assumes it's called in an opencoded context - emitEjsvalTo(val, type, prefix) { - if (this.triple.pointerSize() === 64) { - let payload = this.createEjsvalAnd( - val, - consts.int64_lowhi(0x7fff, 0xffffffff), - `${prefix}_payload` - ); - return ir.createIntToPtr(payload, type, `${prefix}_load`); - } else { - throw new Error("emitEjsvalTo not implemented for this case"); - } - } - - emitEjsvalFromPtr(ptr, prefix) { - if (this.triple.pointerSize() === 64) { - let fromptr_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - `${prefix}_ejsval` - ); - let intval = ir.createPtrToInt(ptr, types.Int64, `${prefix}_intval`); - let payload = ir.createOr( - intval, - consts.int64_lowhi(0xfffc0000, 0x00000000), - `${prefix}_payload` - ); - let alloca_as_int64 = ir.createBitCast( - fromptr_alloca, - types.Int64.pointerTo(), - `${prefix}_alloca_asptr` - ); - ir.createStore(payload, alloca_as_int64, `${prefix}_store`); - return ir.createLoad(types.EjsValue, fromptr_alloca, `${prefix}_load`); - } else { - throw new Error("emitEjsvalTo not implemented for this case"); - } - } - - emitEjsvalToObjectPtr(val) { - return this.emitEjsvalTo(val, types.EjsObject.pointerTo(), "to_objectptr"); - } - - emitEjsvalToClosureEnvPtr(val) { - return this.emitEjsvalTo(val, types.EjsClosureEnv.pointerTo(), "to_ptr"); - } - - // this method assumes it's called in an opencoded context - emitLoadSpecops(obj) { - if (this.triple.pointerSize() === 64) { - // %1 = getelementptr inbounds %struct._EJSObject* %obj, i64 0, i32 1 - // %specops_load = load %struct.EJSSpecOps** %1, align 8, !tbaa !0 - let specops_slot = ir.createInBoundsGetElementPointer( - types.EjsObject, - obj, - [consts.int64(0), consts.int32(1)], - "specops_slot" - ); - return ir.createLoad(types.EjsValue, specops_slot, "specops_load"); - } else { - throw new Error("emitLoadSpecops not implemented for this case"); - } - } - - emitThrowNativeError(errorCode, errorMessage) { - this.createCall( - this.ejs_runtime.throw_nativeerror_utf8, - [consts.int32(errorCode), consts.string(ir, errorMessage)], - "", - true - ); - return ir.createUnreachable(); - } - - // this method assumes it's called in an opencoded context - emitLoadEjsFunctionClosureFunc(closure) { - if (this.triple.pointerSize() === 64) { - let func_slot_gep = ir.createInBoundsGetElementPointer( - types.EjsClosureEnv.pointerTo(), - closure, - [consts.int64(1)], - "func_slot_gep" - ); - let func_slot = ir.createBitCast( - func_slot_gep, - this.abi - .createFunctionType(types.EjsValue, [ - types.EjsValue, - types.EjsValue, - types.Int32, - types.EjsValue.pointerTo(), - ]) - .pointerTo() - .pointerTo(), - "func_slot" - ); - return ir.createLoad(types.EjsValue, func_slot, "func_load"); - } else { - throw new Error("emitLoadEjsFunctionClosureFunc not implemented for this case"); - } - } - - // this method assumes it's called in an opencoded context - emitLoadEjsFunctionClosureEnv(closure) { - if (this.triple.pointerSize() === 64) { - let env_slot_gep = ir.createInBoundsGetElementPointer( - types.EjsClosureEnv.pointerTo(), - closure, - [consts.int64(1), consts.int32(1)], - "env_slot_gep" - ); - let env_slot = ir.createBitCast(env_slot_gep, types.EjsValue.pointerTo(), "env_slot"); - return ir.createLoad(types.EjsValue, env_slot, "env_load"); - } else { - throw new Error("emitLoadEjsFunctionClosureEnv not implemented for this case"); - } - } - - handleInvokeClosure(exp, opencode) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - if (!this.currentFunction.scratch_area) { - throw new Error( - `Internal error: function ${this.currentFunction.name} has no scratch space and makes a [[Call]] call with ${exp.arguments.length} arguments (${escodegenerate(exp)})` - ); - } - - let argv = this.visitArgsForCall(this.ejs_runtime.invoke_closure, true, exp.arguments); - - if (opencode && this.triple.pointerSize() === 64) { - // - // generate basically the following code: - // - // f = argv[0] - // if (EJSVAL_IS_FUNCTION(F) - // f->func(f->env, argv[1], argv[2], argv[3]) - // else - // _ejs_invoke_closure(...argv) - // - let candidate_is_object_bb = new llvm.BasicBlock("candidate_is_object_bb", insertFunc); - var direct_invoke_bb = new llvm.BasicBlock("direct_invoke_bb", insertFunc); - var runtime_invoke_bb = new llvm.BasicBlock("runtime_invoke_bb", insertFunc); - var invoke_merge_bb = new llvm.BasicBlock("invoke_merge_bb", insertFunc); - - let cmp = this.isObject(argv[0]); - ir.createCondBr(cmp, candidate_is_object_bb, runtime_invoke_bb); - - var call_result_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "call_result" - ); - - this.doInsideBBlock(candidate_is_object_bb, () => { - let closure = this.emitEjsvalToObjectPtr(argv[0]); - let cmp = this.isObjectFunction(closure); - - ir.createCondBr(cmp, direct_invoke_bb, runtime_invoke_bb); - - // in the successful case we modify our argv with the responses and directly invoke the closure func - this.doInsideBBlock(direct_invoke_bb, () => { - let func_load = this.emitLoadEjsFunctionClosureFunc(closure); - let env_load = this.emitLoadEjsFunctionClosureEnv(closure); - let direct_call_result = this.createCall( - func_load, - [env_load, argv[1], argv[2], argv[3], argv[4], argv[5]], - "callresult" - ); - ir.createStore(direct_call_result, call_result_alloca); - ir.createBr(invoke_merge_bb); - }); - - this.doInsideBBlock(runtime_invoke_bb, () => { - let runtime_call_result = this.createCall( - this.ejs_runtime.invoke_closure, - argv, - "callresult", - true - ); - ir.createStore(runtime_call_result, call_result_alloca); - ir.createBr(invoke_merge_bb); - }); - }); - - ir.setInsertPoint(invoke_merge_bb); - - return ir.createLoad(types.EjsValue, call_result_alloca, "call_result_load"); - } else { - return this.createCall(this.ejs_runtime.invoke_closure, argv, "call", true); - } - } - - handleConstructClosure(exp) { - let this_alloca = this.createAlloca(this.currentFunction, types.EjsValue, "this_alloca"); - this.storeUndefined(this_alloca, "store_undefined_this"); - - if (!this.currentFunction.scratch_area) { - throw new Error( - `Internal error: function has no scratch space and makes a [[Construct]] call with ${exp.arguments.length} arguments` - ); - } - - let argv = this.visitArgsForConstruct( - this.ejs_runtime.construct_closure, - exp.arguments, - this_alloca - ); - - return this.createCall(this.ejs_runtime.construct_closure, argv, "construct", true); - } - - handleConstructSuper(exp) { - let this_ptr = this.createLoad( - types.EjsValue.pointerTo(), - this.findIdentifierInScope("%this"), - "this_ptr" - ); - let newTarget = this.createEjsValueLoad( - this.findIdentifierInScope("%newTarget"), - "load_newTarget" - ); - - let argv = this.visitArgsForConstruct( - this.ejs_runtime.construct_closure, - exp.arguments, - this_ptr, - newTarget - ); - - return this.createCall(this.ejs_runtime.construct_closure, argv, "construct_super", true); - } - - handleConstructSuperApply(exp) { - let this_ptr = this.createLoad( - types.EjsValue.pointerTo(), - this.findIdentifierInScope("%this"), - "this_ptr" - ); - let newTarget = this.createEjsValueLoad( - this.findIdentifierInScope("%newTarget"), - "load_newTarget" - ); - - let argv = this.visitArgsForConstruct( - this.ejs_runtime.construct_closure_apply, - exp.arguments, - this_ptr, - newTarget - ); - - return this.createCall( - this.ejs_runtime.construct_closure_apply, - argv, - "construct_super_apply", - true - ); - } - - // %constructApply(ctor, argsArray): new Foo(...args) — the runtime - // spreads the dense array (newTarget = the constructor itself) - handleConstructApply(exp) { - let ctor = this.visit(exp.arguments[0]); - let arr = this.visit(exp.arguments[1]); - - let this_alloca = this.createAlloca(this.currentFunction, types.EjsValue, "ctor_apply_this"); - this.storeUndefined(this_alloca); - - const scratchAreaType = llvm.ArrayType.get( - types.EjsValue, - this.currentFunction.scratch_length - ); - let gep = ir.createGetElementPointer( - scratchAreaType, - this.currentFunction.scratch_area, - [consts.int32(0), consts.int64(0)], - "ctor_apply_arg" - ); - ir.createStore(arr, gep); - - return this.createCall( - this.ejs_runtime.construct_closure_apply, - [ctor, this_alloca, consts.int32(1), gep, ctor], - "ctor_apply", - true - ); - } - - handleSetConstructorKindDerived(exp) { - let ctor = this.visit(exp.arguments[0]); - return this.createCall(this.ejs_runtime.set_constructor_kind_derived, [ctor], ""); - } - - handleSetConstructorKindBase(exp) { - let ctor = this.visit(exp.arguments[0]); - return this.createCall(this.ejs_runtime.set_constructor_kind_base, [ctor], ""); - } - - handleMakeGenerator(exp) { - let argv = this.visitArgsForCall(this.ejs_runtime.make_generator, false, exp.arguments); - return this.createCall(this.ejs_runtime.make_generator, argv, "generator"); - } - - handleGeneratorYield(exp) { - let argv = this.visitArgsForCall(this.ejs_runtime.generator_yield, false, exp.arguments); - return this.createCall(this.ejs_runtime.generator_yield, argv, "yield"); - } - - handleMakeClosure(exp) { - let argv = this.visitArgsForCall(this.ejs_runtime.make_closure, false, exp.arguments); - return this.createCall(this.ejs_runtime.make_closure, argv, "closure_tmp"); - } - - handleMakeClosureNoEnv(exp) { - let argv = this.visitArgsForCall(this.ejs_runtime.make_closure_noenv, false, exp.arguments); - return this.createCall(this.ejs_runtime.make_closure_noenv, argv, "closure_tmp"); - } - - handleMakeAnonClosure(exp) { - let argv = this.visitArgsForCall(this.ejs_runtime.make_anon_closure, false, exp.arguments); - return this.createCall(this.ejs_runtime.make_anon_closure, argv, "closure_tmp"); - } - - handleCreateArgScratchArea(exp) { - let argsArrayType = llvm.ArrayType.get(types.EjsValue, exp.arguments[0].value); - this.currentFunction.scratch_length = exp.arguments[0].value; - this.currentFunction.scratch_area = this.createAlloca( - this.currentFunction, - argsArrayType, - "args_scratch_area" - ); - this.currentFunction.scratch_area.setAlignment(8); - return this.currentFunction.scratch_area; - } - - handleMakeClosureEnv(exp) { - let size = exp.arguments[0].value; - return this.createCall(this.ejs_runtime.make_closure_env, [consts.int32(size)], "env_tmp"); - } - - handleGetSlot(exp, opencode) { - // - // %ref = handleSlotRef - // %ret = load %EjsValueType* %ref, align 8 - // - let slot_ref = this.handleSlotRef(exp, opencode); - return ir.createLoad(types.EjsValue, slot_ref, "slot_ref_load"); - } - - handleSetSlot(exp, opencode) { - let new_slot_val; - - if (exp.arguments.length === 4) new_slot_val = exp.arguments[3]; - else new_slot_val = exp.arguments[2]; - - let slotref = this.handleSlotRef(exp, opencode); - - this.storeToDest(slotref, new_slot_val); - - return ir.createLoad(types.EjsValue, slotref, "load_slot"); - } - - handleSlotRef(exp, opencode) { - let env = this.visitOrNull(exp.arguments[0]); - let slotnum = exp.arguments[1].value; - - if (opencode && this.triple.pointerSize() === 64) { - let envp = this.emitEjsvalToClosureEnvPtr(env); - return ir.createInBoundsGetElementPointer( - types.EjsClosureEnv, - envp, - [consts.int64(0), consts.int32(2), consts.int64(slotnum)], - "slot_ref" - ); - } else { - return this.createCall( - this.ejs_runtime.get_env_slot_ref, - [env, consts.int32(slotnum)], - "slot_ref_tmp", - false - ); - } - } - - createEjsBoolSelect(val, falseval = false) { - let rv = ir.createSelect( - val, - this.loadBoolEjsValue(!falseval), - this.loadBoolEjsValue(falseval), - "sel" - ); - rv._ejs_returns_ejsval_bool = true; - return rv; - } - - getEjsvalBits(arg) { - let bits_alloca; - - if (this.currentFunction.bits_alloca) bits_alloca = this.currentFunction.bits_alloca; - else bits_alloca = this.createAlloca(this.currentFunction, types.EjsValue, "bits_alloca"); - - ir.createStore(arg, bits_alloca); - let bits_ptr = ir.createBitCast(bits_alloca, types.Int64.pointerTo(), "bits_ptr"); - if (!this.currentFunction.bits_alloca) this.currentFunction.bits_alloca = bits_alloca; - return ir.createLoad(types.Int64, bits_ptr, "bits_load"); - } - - createEjsvalICmpUGt(arg, i64_const, name) { - return ir.createICmpUGt(this.getEjsvalBits(arg), i64_const, name); - } createEjsvalICmpULt(arg, i64_const, name) { return ir.createICmpULt(this.getEjsvalBits(arg), i64_const, name); } - createEjsvalICmpEq(arg, i64_const, name) { - return ir.createICmpEq(this.getEjsvalBits(arg), i64_const, name); - } - createEjsvalAnd(arg, i64_const, name) { - return ir.createAnd(this.getEjsvalBits(arg), i64_const, name); - } - - isObject(val) { - if (this.triple.pointerSize() === 64) { - return this.createEjsvalICmpUGt( - val, - consts.int64_lowhi(0xfffbffff, 0xffffffff), - "cmpresult" - ); - } else { - let trunc = ir.createTrunc(this.getEjsvalBits(val), types.Int32, "trunc.i"); - return ir.createICmpEq(trunc, consts.int32(-120), "cmpresult"); - } - } - - isObjectFunction(obj) { - return ir.createICmpEq( - this.emitLoadSpecops(obj), - this.ejs_runtime.function_specops, - "function_specops_cmp" - ); - } - - isObjectSymbol(obj) { - return ir.createICmpEq( - this.emitLoadSpecops(obj), - this.ejs_runtime.symbol_specops, - "symbol_specops_cmp" - ); - } - - isString(val) { - if (this.triple.pointerSize() === 64) { - let mask = this.createEjsvalAnd( - val, - consts.int64_lowhi(0xffff8000, 0x00000000), - "mask.i" - ); - return ir.createICmpEq(mask, consts.int64_lowhi(0xfffa8000, 0x00000000), "cmpresult"); - } else { - let trunc = ir.createTrunc(this.getEjsvalBits(val), types.Int32, "trunc.i"); - return ir.createICmpEq(trunc, consts.int32(-123), "cmpresult"); - } - } - isNumber(val) { if (this.triple.pointerSize() === 64) { return this.createEjsvalICmpULt( @@ -3149,502 +574,6 @@ class LLVMIRVisitor extends TreeVisitor { return ir.createICmpEq(trunc, consts.int32(-127), "cmpresult"); } } - - isBoolean(val) { - if (this.triple.pointerSize() === 64) { - let mask = this.createEjsvalAnd( - val, - consts.int64_lowhi(0xffff8000, 0x00000000), - "mask.i" - ); - return ir.createICmpEq(mask, consts.int64_lowhi(0xfff98000, 0x00000000), "cmpresult"); - } else { - let trunc = ir.createTrunc(this.getEjsvalBits(val), types.Int32, "trunc.i"); - return ir.createICmpEq(trunc, consts.int32(-125), "cmpresult"); - } - } - - // these two could/should be changed to check for the specific bitpattern of _ejs_true/_ejs_false - isTrue(val) { - return ir.createICmpEq( - val, - consts.ejsval_true(this.triple.pointerSize() === 32), - "cmpresult" - ); - } - isFalse(val) { - return ir.createICmpEq( - val, - consts.ejsval_false(this.triple.pointerSize() === 32), - "cmpresult" - ); - } - - isUndefined(val) { - if (this.triple.pointerSize() === 64) { - return this.createEjsvalICmpEq( - val, - consts.int64_lowhi(0xfff90000, 0x00000000), - "cmpresult" - ); - } else { - let trunc = ir.createTrunc(this.getEjsvalBits(val), types.Int32, "trunc.i"); - return ir.createICmpEq(trunc, consts.int32(-126), "cmpresult"); - } - } - - isNull(val) { - if (this.triple.pointerSize() === 64) { - return this.createEjsvalICmpEq( - val, - consts.int64_lowhi(0xfffb8000, 0x00000000), - "cmpresult" - ); - } else { - let trunc = ir.createTrunc(this.getEjsvalBits(val), types.Int32, "trunc.i"); - return ir.createICmpEq(trunc, consts.int32(-121), "cmpresult"); - } - } - - handleTypeofIsObject(exp) { - let arg = this.visitOrNull(exp.arguments[0]); - return this.createEjsBoolSelect(this.isObject(arg)); - } - - handleTypeofIsFunction(exp, opencode) { - let arg = this.visitOrNull(exp.arguments[0]); - if (opencode && this.triple.pointerSize() === 64) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - var typeofIsFunction_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "typeof_is_function" - ); - - var failure_bb = new llvm.BasicBlock("typeof_function_false", insertFunc); - let is_object_bb = new llvm.BasicBlock("typeof_function_is_object", insertFunc); - var success_bb = new llvm.BasicBlock("typeof_function_true", insertFunc); - var merge_bb = new llvm.BasicBlock("typeof_function_merge", insertFunc); - - let cmp = this.isObject(arg, true); - ir.createCondBr(cmp, is_object_bb, failure_bb); - - this.doInsideBBlock(is_object_bb, () => { - let obj = this.emitEjsvalToObjectPtr(arg); - let cmp = this.isObjectFunction(obj); - ir.createCondBr(cmp, success_bb, failure_bb); - }); - - this.doInsideBBlock(success_bb, () => { - this.storeBoolean(typeofIsFunction_alloca, true, "store_typeof"); - ir.createBr(merge_bb); - }); - - this.doInsideBBlock(failure_bb, () => { - this.storeBoolean(typeofIsFunction_alloca, false, "store_typeof"); - ir.createBr(merge_bb); - }); - - ir.setInsertPoint(merge_bb); - - let rv = ir.createLoad(types.EjsValue, typeofIsFunction_alloca, "typeof_is_function"); - rv._ejs_returns_ejsval_bool = true; - return rv; - } else { - return this.createCall( - this.ejs_runtime.typeof_is_function, - [arg], - "is_function", - false - ); - } - } - - handleTypeofIsSymbol(exp, opencode) { - let arg = this.visitOrNull(exp.arguments[0]); - if (opencode && this.triple.pointerSize() === 64) { - let insertBlock = ir.getInsertBlock(); - let insertFunc = insertBlock.parent; - - var typeofIsSymbol_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "typeof_is_symbol" - ); - - var failure_bb = new llvm.BasicBlock("typeof_symbol_false", insertFunc); - let is_object_bb = new llvm.BasicBlock("typeof_symbol_is_object", insertFunc); - var success_bb = new llvm.BasicBlock("typeof_symbol_true", insertFunc); - var merge_bb = new llvm.BasicBlock("typeof_symbol_merge", insertFunc); - - let cmp = this.isObject(arg, true); - ir.createCondBr(cmp, is_object_bb, failure_bb); - - this.doInsideBBlock(is_object_bb, () => { - let obj = this.emitEjsvalToObjectPtr(arg); - let cmp = this.isObjectSymbol(obj); - ir.createCondBr(cmp, success_bb, failure_bb); - }); - - this.doInsideBBlock(success_bb, () => { - this.storeBoolean(typeofIsSymbol_alloca, true, "store_typeof"); - ir.createBr(merge_bb); - }); - - this.doInsideBBlock(failure_bb, () => { - this.storeBoolean(typeofIsSymbol_alloca, false, "store_typeof"); - ir.createBr(merge_bb); - }); - - ir.setInsertPoint(merge_bb); - - let rv = ir.createLoad(types.EjsValue, typeofIsSymbol_alloca, "typeof_is_symbol"); - rv._ejs_returns_ejsval_bool = true; - return rv; - } else { - return this.createCall(this.ejs_runtime.typeof_is_symbol, [arg], "is_symbol", false); - } - } - - handleTypeofIsString(exp) { - let arg = this.visitOrNull(exp.arguments[0]); - return this.createEjsBoolSelect(this.isString(arg)); - } - - handleTypeofIsNumber(exp) { - let arg = this.visitOrNull(exp.arguments[0]); - return this.createEjsBoolSelect(this.isNumber(arg)); - } - - handleTypeofIsBoolean(exp) { - let arg = this.visitOrNull(exp.arguments[0]); - return this.createEjsBoolSelect(this.isBoolean(arg)); - } - - handleIsUndefined(exp) { - let arg = this.visitOrNull(exp.arguments[0]); - return this.createEjsBoolSelect(this.isUndefined(arg)); - } - - handleIsNull(exp) { - let arg = this.visitOrNull(exp.arguments[0]); - return this.createEjsBoolSelect(this.isNull(arg)); - } - - handleIsNullOrUndefined(exp, opencode) { - let arg = this.visitOrNull(exp.arguments[0]); - if (opencode) - return this.createEjsBoolSelect( - ir.createOr(this.isNull(arg), this.isUndefined(arg), "or") - ); - else - return this.createCall( - this.ejs_binops["=="], - [this.loadNullEjsValue(), arg], - "is_null_or_undefined", - false - ); - } - - handleBuiltinUndefined() { - return this.loadUndefinedEjsValue(); - } - - handleSetPrototypeOf(exp) { - let obj = this.visitOrNull(exp.arguments[0]); - let proto = this.visitOrNull(exp.arguments[1]); - return this.createCall( - this.ejs_runtime.object_set_prototype_of, - [obj, proto], - "set_prototype_of", - true - ); - // we should check the return value of set_prototype_of - } - - handleObjectCreate(exp) { - let proto = this.visitOrNull(exp.arguments[0]); - return this.createCall(this.ejs_runtime.object_create, [proto], "object_create", true); - // we should check the return value of object_create - } - - handleArrayFromRest(exp) { - let rest_name = exp.arguments[0].value; - let formal_params_length = exp.arguments[1].value; - - let has_rest_bb = new llvm.BasicBlock("has_rest_bb", this.currentFunction); - let no_rest_bb = new llvm.BasicBlock("no_rest_bb", this.currentFunction); - let rest_merge_bb = new llvm.BasicBlock("rest_merge", this.currentFunction); - - let rest_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - "local_rest_object" - ); - - let load_argc = this.createLoad( - types.Int32, - this.currentFunction.topScope.get("%argc"), - "argc_load" - ); - - let cmp = ir.createICmpSGt(load_argc, consts.int32(formal_params_length), "argcmpresult"); - ir.createCondBr(cmp, has_rest_bb, no_rest_bb); - - ir.setInsertPoint(has_rest_bb); - // we have > args than are declared, shove the rest into the rest parameter - let load_args = this.createLoad( - types.EjsValue.pointerTo(), - this.currentFunction.topScope.get("%args"), - "args_load" - ); - let gep = ir.createInBoundsGetElementPointer( - types.EjsValue.pointerTo(), - load_args, - [consts.int32(formal_params_length)], - "rest_arg_gep" - ); - load_argc = ir.createNswSub(load_argc, consts.int32(formal_params_length)); - load_argc = ir.createZExt(load_argc, types.Int64); - let rest_value = this.createCall( - this.ejs_runtime.array_new_copy, - [load_argc, gep], - "argstmp", - !this.ejs_runtime.array_new_copy.doesNotThrow - ); - ir.createStore(rest_value, rest_alloca); - ir.createBr(rest_merge_bb); - - ir.setInsertPoint(no_rest_bb); - // we have <= args than are declared, so the rest parameter is just an empty array - rest_value = this.createCall( - this.ejs_runtime.array_new, - [consts.int64(0), consts.False()], - "arrtmp", - !this.ejs_runtime.array_new.doesNotThrow - ); - ir.createStore(rest_value, rest_alloca); - ir.createBr(rest_merge_bb); - - ir.setInsertPoint(rest_merge_bb); - - this.currentFunction.topScope.set(rest_name, rest_alloca); - this.currentFunction.restArgPresent = true; - - return ir.createLoad(types.EjsValue, rest_alloca, "load_rest"); - } - - handleArrayFromSpread(exp) { - let arg_count = exp.arguments.length; - let spread_alloca = this.currentFunction.scratch_area; - - let visited = []; - for (let a of exp.arguments) visited.push(this.visitOrNull(a)); - - const scratchAreaType = llvm.ArrayType.get( - types.EjsValue, - this.currentFunction.scratch_length - ); - - visited.forEach((a, i) => { - let gep = ir.createGetElementPointer( - scratchAreaType, - spread_alloca, - [consts.int32(0), consts.int64(i)], - `spread_gep_${i}` - ); - ir.createStore(visited[i], gep, `spread[${i}]-store`); - }); - - let argsCast = ir.createGetElementPointer( - scratchAreaType, - spread_alloca, - [consts.int32(0), consts.int64(0)], - "spread_call_args_load" - ); - - let argv = [consts.int32(arg_count), argsCast]; - return this.createCall(this.ejs_runtime.array_from_iterables, argv, "spread_arr"); - } - - handleGetArg(exp) { - // the intrinsic looks like this: %getArg(args_index, default_value) - // - // if (argc > args_index) { - // result = default_value - // } - // else { - // if (default_value === undefined) { - // result = default_value - // } - // else { - // if (args[args_index] === undefined) { - // result = default_value - // } - // else { - // result = args[args_index] - // } - // } - // } - // - // this expanded form is only necessary when default_value is not undefined (something we know at compile time). - // when default_value is undefined, we end up with this simpler form: - // - // if (argc > args_index) { - // result = default_value - // } - // else { - // result = args[args_index] - // } - - let arg_num = exp.arguments[0].value; - let load_argc = this.createLoad( - types.Int32, - this.currentFunction.topScope.get("%argc"), - "argc_n_load" - ); - let cmp = ir.createICmpUGE(load_argc, consts.int32(arg_num + 1), "argcmpresult"); - - let has_slot_bb = new llvm.BasicBlock(`has_${arg_num}_slot`, this.currentFunction); - let no_slot_bb = new llvm.BasicBlock(`no_${arg_num}_slot`, this.currentFunction); - let merge_bb = new llvm.BasicBlock(`arg_${arg_num}_merge`, this.currentFunction); - - let arg_value_alloca = this.createAlloca( - this.currentFunction, - types.EjsValue, - `arg_${arg_num}_value` - ); - - ir.createCondBr(cmp, has_slot_bb, no_slot_bb); - - this.doInsideBBlock(has_slot_bb, () => { - let load_args = this.createLoad( - types.EjsValue.pointerTo(), - this.currentFunction.topScope.get("%args"), - "args_load" - ); - let arg_ptr = ir.createGetElementPointer( - types.EjsValue, - load_args, - [consts.int32(arg_num)], - `arg${arg_num}_ptr` - ); - let arg_load = this.createEjsValueLoad(arg_ptr, `arg${arg_num}`); - if ( - exp.arguments.length > 1 && - (exp.arguments[1].type !== b.Literal || exp.arguments[1].value !== undefined) - ) { - // more complicated form, we need to check if the passed arg was undefined - let arg_is_undefined = this.isUndefined(arg_load); - let arg_select = ir.createSelect( - arg_is_undefined, - this.visit(exp.arguments[1]), - arg_load, - "arg_select" - ); - ir.createStore(arg_select, arg_value_alloca, "store_arg_value"); - } else { - // simplified case above, just store it into our alloca - ir.createStore(arg_load, arg_value_alloca, "store_arg_value"); - } - ir.createBr(merge_bb); - }); - - this.doInsideBBlock(no_slot_bb, () => { - // we didn't have the slot - let default_arg = this.visit(exp.arguments[1]); - ir.createStore(default_arg, arg_value_alloca, "store_arg_value"); - ir.createBr(merge_bb); - }); - - ir.setInsertPoint(merge_bb); - return ir.createLoad(types.EjsValue, arg_value_alloca, "load_arg_value"); - } - - handleCreateIterResult(exp) { - let value = this.visit(exp.arguments[0]); - let done = this.visit(exp.arguments[1]); - return this.createCall(this.ejs_runtime.create_iter_result, [value, done], "iter_result"); - } - - handleCreateIteratorWrapper(exp) { - let iter = this.visit(exp.arguments[0]); - return this.createCall(this.ejs_runtime.iterator_wrapper_new, [iter], "iter_wrapper"); - } -} - -class AddFunctionsVisitor extends TreeVisitor { - constructor(module, abi, dibuilder, difile) { - super(); - this.module = module; - this.abi = abi; - this.dibuilder = dibuilder; - this.difile = difile; - } - - visitFunction(n) { - if (n && n.id && n.id.name) n.ir_name = n.id.name; - else n.ir_name = "_ejs_anonymous"; - - // at this point point n.params includes %env as its first param, and is followed by all the formal parameters from the original - // script source. we remove the %env parameter and save off he rest of the formal parameter names, and replace the list with - // our runtime parameters. - - // remove %env from the formal parameter list, but save its name first - let env_name = n.params[0].name; - n.params.splice(0, 1); - // and store the JS formal parameters someplace else - n.formal_params = n.params; - - n.params = []; - for (let param of this.abi.ejs_params) - n.params.push({ - type: b.Identifier, - name: param.name, - llvm_type: param.llvm_type, - }); - n.params[this.abi.env_param_index].name = env_name; - - // create the llvm IR function using our platform calling convention - n.ir_func = types.takes_builtins( - this.abi.createFunction( - this.module, - n.ir_name, - this.abi.ejs_return_type, - n.params.map((param) => param.llvm_type) - ) - ); - if (!n.toplevel) n.ir_func.setInternalLinkage(); - - let lineno = 0; - if (n.loc) { - lineno = n.loc.start.line; - } - if (this.dibuilder && this.difile) - n.ir_func.debug_info = this.dibuilder.createFunction( - this.difile, - n.ir_name, - n.displayName || n.ir_name, - this.difile, - lineno, - false, - true, - lineno, - 0, - true, - n.ir_func - ); - - let ir_args = n.ir_func.args; - n.params.forEach((param, i) => { - ir_args[i].setName(param.name); - }); - - // we don't need to recurse here since we won't have nested functions at this point - return n; - } } function insert_toplevel_func(tree, moduleInfo) { diff --git a/lib/exitable-scope.js b/lib/exitable-scope.js deleted file mode 100644 index cab63894..00000000 --- a/lib/exitable-scope.js +++ /dev/null @@ -1,196 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -import { Stack } from "./stack-es6"; - -import * as llvm from "@llvm"; -let irbuilder = llvm.IRBuilder; - -import * as consts from "./consts"; - -// -// ExitableScopes are basically the means by which ejs deals with 'break' and 'continue'. -// -// Each ExitableScope has two exit functions, exitFore and exitAft. -// exitFore corresponds to 'continue', and exitAft corresponds to -// 'break' (or falling off the end of the scope if the fromBreak arg is false.) -// -export class ExitableScope { - constructor(label = null) { - this.label = label; - this.parent = null; - } - - exitFore() { - throw new Error("Exitable scope does not allow exitFore"); - } - - exitAft() { - throw new Error("Exitable scope does not allow exitAft"); - } - - enter() { - this.parent = ExitableScope.scopeStack; - ExitableScope.scopeStack = this; - } - - leave() { - ExitableScope.scopeStack = this.parent; - this.parent = null; - } -} -ExitableScope.scopeStack = null; -ExitableScope.REASON_RETURN = -10; - -export class TryExitableScope extends ExitableScope { - constructor(cleanup_reason, cleanup_bb, create_landing_pad_bb, hasFinally) { - super(); - this.cleanup_reason = cleanup_reason; - this.cleanup_bb = cleanup_bb; - this.create_landing_pad_bb = create_landing_pad_bb; - this.hasFinally = hasFinally; - this.isTry = true; - this.destinations = []; - } - - enterTry() { - TryExitableScope.unwindStack.push(this); - } - - leaveTry() { - TryExitableScope.unwindStack.pop(); - } - - getLandingPadBlock() { - if (!this.landing_pad_block) this.landing_pad_block = this.create_landing_pad_bb(); - return this.landing_pad_block; - } - - lookupDestinationIdForScope(scope, reason, label = null) { - // the label rides along in the destination: when the destination - // is ANOTHER finally scope (nested finallies — DesugarLetLoopVars - // wraps every for-let body in one), its dispatch must re-exit - // with the label or the continue/break lands on the innermost - // loop instead of the labeled one - for (let dest of this.destinations) - if (dest.scope === scope && dest.reason === reason && dest.label === label) - return dest.id; - - let id = consts.int32(this.destinations.length); - this.destinations.unshift({ scope: scope, reason: reason, id: id, label: label }); - return id; - } - - exitFore(label = null) { - let scope; - if (label) scope = LoopExitableScope.findLabeledOrFinally(label, this.parent); - else scope = LoopExitableScope.findLoopOrFinally(this.parent); - - if (this.hasFinally) { - let reason = this.lookupDestinationIdForScope( - scope, - TryExitableScope.REASON_CONTINUE, - label - ); - irbuilder.createStore(reason, this.cleanup_reason); - irbuilder.createBr(this.cleanup_bb); - } else { - scope.exitFore(label); - } - } - - exitAft(fromBreak, label = null) { - let scope; - // first we find our destination scope - if (fromBreak) { - if (label) scope = LoopExitableScope.findLabeledOrFinally(label, this.parent); - else scope = this.parent; - } - - // then we either create a branch to our cleanup_bb - // with the right reason (we'll encode the exitAft from - // the dest scope in the cleanup_bb), or we exit from - // the dest scope directly if we're lacking a cleanup_bb - if (this.hasFinally) { - let reason; - if (fromBreak) - reason = this.lookupDestinationIdForScope( - scope, - TryExitableScope.REASON_BREAK, - label - ); - else reason = consts.int32(TryExitableScope.REASON_FALLOFF_TRY); - - irbuilder.createStore(reason, this.cleanup_reason); - irbuilder.createBr(this.cleanup_bb); - } else { - if (fromBreak) scope.exitAft(fromBreak, label); - else irbuilder.createBr(this.cleanup_bb); - } - } -} -TryExitableScope.REASON_FALLOFF_TRY = -2; // we fell off the end of the try block -TryExitableScope.REASON_EXCEPTION = -20; // an exception unwound into a finally-only try -TryExitableScope.REASON_ERROR = -1; // error condition -TryExitableScope.REASON_BREAK = "break"; -TryExitableScope.REASON_CONTINUE = "continue"; -TryExitableScope.unwindStack = new Stack(); - -export class SwitchExitableScope extends ExitableScope { - constructor(merge_bb) { - super(); - this.merge_bb = merge_bb; - } - - exitAft() { - irbuilder.createBr(this.merge_bb); - } -} - -export class LoopExitableScope extends ExitableScope { - constructor(label, fore_bb, aft_bb) { - super(label); - this.fore_bb = fore_bb; - this.aft_bb = aft_bb; - this.isLoop = true; - } - - exitFore(label = null) { - if (label && label !== this.label) - LoopExitableScope.findLabeledOrFinally(label).exitFore(label); - else irbuilder.createBr(this.fore_bb); - } - - exitAft(fromBreak, label = null) { - if (label && label !== this.label) - LoopExitableScope.findLabeledOrFinally(label).exitAft(fromBreak, label); - else irbuilder.createBr(this.aft_bb); - } - - static findLabeledOrFinally(l, stack = ExitableScope.scopeStack) { - if (l === stack.label) return stack; - if (stack.hasFinally) return stack; - return LoopExitableScope.findLabeledOrFinally(l, stack.parent); - } - - static findLoopOrFinally(stack = ExitableScope.scopeStack) { - if (stack.isLoop) return stack; - if (stack.hasFinally) return stack; - return LoopExitableScope.findLoopOrFinally(stack.parent); - } -} - -export class LabeledStatementExitableScope extends ExitableScope { - constructor(label, aft_bb) { - super(label); - this.aft_bb = aft_bb; - } - - exitAft() { - irbuilder.createBr(this.aft_bb); - } - - exitFore() { - throw new Error("cannot continue this label"); - } -} diff --git a/lib/module-info.js b/lib/module-info.js index 403c1f94..d7813228 100644 --- a/lib/module-info.js +++ b/lib/module-info.js @@ -2,9 +2,7 @@ * vim: set ts=4 sw=4 et tw=99 ft=js: */ -import { intrinsic, sanitize_with_regexp } from "./echo-util"; -import { moduleGetSlot_id, moduleSetSlot_id, env_unused_id, value_id } from "./common-ids"; -import * as b from "./ast-builder"; +import { sanitize_with_regexp } from "./echo-util"; export class ModuleInfo { constructor(is_native) { @@ -63,52 +61,6 @@ export class JSModuleInfo extends ModuleInfo { this.module_name = `_ejs_module_${sanitized_path}`; } - getExportGetter(ident) { - let export_info = this.exports.get(ident); - if (export_info.promoted) return null; - let function_id = b.identifier(`get_export_${ident}`); - let loc = { start: { line: 0, column: 0 } }; - if (export_info.constval) { - return b.functionExpression( - function_id, - [env_unused_id], - b.blockStatement([b.returnStatement(export_info.constval)], loc), - [], - null, - loc - ); - } else { - return b.functionExpression( - function_id, - [env_unused_id], - b.blockStatement( - [ - b.returnStatement( - intrinsic(moduleGetSlot_id, [b.literal(this.path), b.literal(ident)]) - ), - ], - loc - ), - [], - null, - loc - ); - } - } - - getExportSetter(ident) { - let export_info = this.exports.get(ident); - if (export_info && export_info.promoted) return null; - let function_id = b.identifier(`set_export_${ident}`); - // we shouldn't generate a setter for const exports - return b.functionExpression( - function_id, - [env_unused_id, value_id], - b.blockStatement([ - intrinsic(moduleSetSlot_id, [b.literal(this.path), b.literal(ident), value_id]), - ]) - ); - } } export class NativeModuleInfo extends ModuleInfo { diff --git a/lib/optimizations.js b/lib/optimizations.js deleted file mode 100644 index 1856a31d..00000000 --- a/lib/optimizations.js +++ /dev/null @@ -1,20 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -import * as escodegen from "../external-deps/escodegen/escodegen-es6"; - -import * as debug from "./debug"; - -import { ReplaceUnaryVoid } from "./passes/replace-unary-void"; - -const passes = [ReplaceUnaryVoid]; - -export function run(tree) { - passes.forEach((passType) => { - let pass = new passType(); - tree = pass.visit(tree); - debug.log(2, `after: ${passType.name}`); - debug.log(2, () => escodegen.generate(tree)); - }); - return tree; -} diff --git a/lib/passes/desugar-arguments.js b/lib/passes/desugar-arguments.js deleted file mode 100644 index f9f82106..00000000 --- a/lib/passes/desugar-arguments.js +++ /dev/null @@ -1,40 +0,0 @@ -import { reportError } from "../errors"; -import { argPresent_id, getArg_id, getArgumentsObject_id } from "../common-ids"; -import { intrinsic } from "../echo-util"; -import { TransformPass } from "../node-visitor"; -import * as b from "../ast-builder"; - -export class DesugarArguments extends TransformPass { - constructor(options, filename) { - super(options); - this.filename = filename; - } - - visitIdentifier(n) { - if (n.name === "arguments") return intrinsic(getArgumentsObject_id); - return super.visitIdentifier(n); - } - - visitVariableDeclarator(n) { - if (n.id.name === "arguments") - reportError( - SyntaxError, - "Cannot declare variable named 'arguments'", - this.filename, - n.id.loc - ); - return super.visitVariableDeclarator(n); - } - - visitAssignmentExpression(n) { - if (n.left.type === b.Identifier && n.left.name === "arguments") - reportError(SyntaxError, "Cannot set 'arguments'", this.filename, n.left.loc); - return super.visitAssignmentExpression(n); - } - - visitProperty(n) { - if (n.computed) n.key = this.visit(n.key); - n.value = this.visit(n.value); - return n; - } -} diff --git a/lib/passes/desugar-arrow-functions.js b/lib/passes/desugar-arrow-functions.js deleted file mode 100644 index 064d75f3..00000000 --- a/lib/passes/desugar-arrow-functions.js +++ /dev/null @@ -1,153 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// this pass converts all arrow functions to normal anonymous function -// expressions with a closed-over 'this' -// -// take the following: -// -// function foo() { -// let mapper = (arr) => { -// arr.map (el => el * this.x); -// }; -// } -// -// This will be compiled to: -// -// function foo() { -// let _this_010 = this; -// let mapper = function (arr) { -// arr.map (function (el) { return el * _this_010.x; }); -// }; -// } -// -// and the usual closure conversion stuff will make sure the bindings -// exists in the closure env as usual. -// - -import { TransformPass } from "../node-visitor"; -import * as b from "../ast-builder"; -import { startGenerator, is_intrinsic } from "../echo-util"; -import { reportError } from "../errors"; - -function definesThis(n) { - return n.type === b.FunctionDeclaration || n.type === b.FunctionExpression; -} - -export class DesugarArrowFunctions extends TransformPass { - constructor(options) { - super(options); - this.mapping = []; - this.thisGen = startGenerator(); - } - - visitArrowFunctionExpression(n) { - if (n.expression) { - n.body = b.blockStatement([b.returnStatement(n.body)], n.body.loc); - n.expression = false; - } - n = this.visitFunction(n); - n.type = b.FunctionExpression; - return n; - } - - visitThisExpression(n) { - if (this.mapping.length === 0) { - // a 'this' at toplevel. not possible in ejs, since we wrap everything in toplevel functions - return b.undefinedLit(); - } - - let topfunc = this.mapping[0].func; - - for (let m of this.mapping) { - if (definesThis(m.func)) { - // if we're already on top, just return the existing thisExpression - if (topfunc === m.func) return n; - - if (m.this_id) return b.identifier(m.this_id); - - m.this_id = `_this_${this.thisGen()}`; - - m.prepends.push(b.letDeclaration(b.identifier(m.this_id), b.thisExpression())); - - return b.identifier(m.this_id); - } - } - - reportError( - SyntaxError, - 'no binding for "this" available for arrow function', - this.filename, - n.loc - ); - } - - visitIdentifier(n) { - if (n.name !== "arguments") return super.visitIdentifier(n); - - if (this.mapping.length > 0) { - let topfunc = this.mapping[0].func; - - for (let m of this.mapping) { - if (definesThis(m.func)) { - // if we're already on top, just return the existing thisExpression - if (topfunc === m.func) return n; - - if (m.arguments_id) return b.identifier(m.arguments_id); - - m.arguments_id = `_arguments_${this.thisGen()}`; - - m.prepends.push(b.letDeclaration(b.identifier(m.arguments_id), n)); - - return b.identifier(m.arguments_id); - } - } - - reportError( - SyntaxError, - 'no binding for "arguments" available for arrow function', - this.filename, - n.loc - ); - } - } - - visitFunction(n) { - // prepends is a list: an arrow using BOTH `this` and `arguments` - // needs two declarations (a single .prepend slot lost one) - this.mapping.unshift({ func: n, id: null, prepends: [] }); - n = super.visitFunction(n); - let m = this.mapping.shift(); - if (m.prepends.length > 0) { - n.body.body = m.prepends.concat(n.body.body); - // a derived constructor's `this` only exists once super() has - // run: the snapshot at function top reads undefined, so - // re-snapshot after any top-level super call. (arrows created - // BEFORE super keep the undefined — echojs has no TDZ.) - if (m.this_id) { - for (let i = 0; i < n.body.body.length; i++) { - let s = n.body.body[i]; - if ( - s.type === b.ExpressionStatement && - (is_intrinsic(s.expression, "%constructSuper") || - is_intrinsic(s.expression, "%constructSuperApply")) - ) { - n.body.body.splice( - i + 1, - 0, - b.expressionStatement( - b.assignmentExpression( - b.identifier(m.this_id), - "=", - b.thisExpression() - ) - ) - ); - i++; - } - } - } - } - return n; - } -} diff --git a/lib/passes/desugar-defaults.js b/lib/passes/desugar-defaults.js deleted file mode 100644 index 6b7139dc..00000000 --- a/lib/passes/desugar-defaults.js +++ /dev/null @@ -1,61 +0,0 @@ -// -// desugars -// -// function (a, b = a) { ... } -// -// to: -// -// function (a, b) { -// a = %getArg(0, undefined); -// b = %getArg(1, a); -// } -// - -import { reportError } from "../errors"; -import { argPresent_id, getArg_id } from "../common-ids"; -import { intrinsic } from "../echo-util"; -import { TransformPass } from "../node-visitor"; -import * as b from "../ast-builder"; - -export class DesugarDefaults extends TransformPass { - constructor(options, filename) { - super(options); - this.filename = filename; - } - - visitFunction(n) { - n = super.visitFunction(n); - - let prepends = []; - let seen_default = false; - - n.params.forEach((p, i) => { - let d = n.defaults[i]; - if (d) { - seen_default = true; - } else { - if (seen_default) { - reportError( - SyntaxError, - "Cannot specify non-default parameter after a default parameter", - this.filename, - p.loc - ); - } - d = b.undefinedLit(); - } - let let_decl = b.letDeclaration( - p, - intrinsic(getArg_id, [ - b.literal(i), - n.defaults[i] != null ? n.defaults[i] : b.undefinedLit(), - ]) - ); - let_decl.loc = n.body.loc; - prepends.push(let_decl); - }); - n.body.body = prepends.concat(n.body.body); - n.defaults = []; - return n; - } -} diff --git a/lib/passes/desugar-for-of.js b/lib/passes/desugar-for-of.js deleted file mode 100644 index b188df8b..00000000 --- a/lib/passes/desugar-for-of.js +++ /dev/null @@ -1,94 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// -// desugars -// -// for (let x of a) { ... } -// -// to: -// -// { -// %forof = a[Symbol.iterator](); -// while (!(%iter_next = %forof.next()).done) { -// let x = %iter_next.value; -// { ... } -// } -// } - -import * as b from "../ast-builder"; -import { TransformPass } from "../node-visitor"; -import { startGenerator } from "../echo-util"; -import { Stack } from "../stack-es6"; -import { Symbol_id, iterator_id, value_id, next_id, done_id } from "../common-ids"; - -let forofgen = startGenerator(); -let freshForOf = function (ident) { - return `%forof${ident}_${forofgen()}`; -}; - -export class DesugarForOf extends TransformPass { - constructor(options) { - super(options); - this.function_stack = new Stack(); - } - - visitFunction(n) { - this.function_stack.push(n); - let rv = super.visitFunction(n); - this.function_stack.pop(); - return rv; - } - - visitForOf(n) { - n.left = this.visit(n.left); - n.right = this.visit(n.right); - n.body = this.visit(n.body); - - let iterable_tmp = freshForOf("tmp"); - let iter_name = freshForOf("iter"); - let iter_next_name = freshForOf("next"); - - let iterable_id = b.identifier(iterable_tmp); - let iter_id = b.identifier(iter_name); - let iter_next_id = b.identifier(iter_next_name); - - let tmp_iterable_decl = b.letDeclaration(iterable_id, n.right); - - let Symbol_iterator = b.memberExpression(Symbol_id, iterator_id); - let get_iterator_stmt = b.letDeclaration( - iter_id, - b.callExpression(b.memberExpression(iterable_id, Symbol_iterator, true), []) - ); - - let loop_iter_stmt; - - if (n.left.type === b.VariableDeclaration) - loop_iter_stmt = b.letDeclaration( - n.left.declarations[0].id, // can there be more than 1? - b.memberExpression(iter_next_id, value_id) - ); - else - loop_iter_stmt = b.expressionStatement( - b.assignmentExpression(n.left, "=", b.memberExpression(iter_next_id, value_id)) - ); - - let next_decl = b.letDeclaration(iter_next_id, b.undefinedLit()); - - let not_done = b.unaryExpression( - "!", - b.memberExpression( - b.assignmentExpression( - iter_next_id, - "=", - b.callExpression(b.memberExpression(iter_id, next_id)) - ), - done_id - ) - ); - - let while_stmt = b.whileStatement(not_done, b.blockStatement([loop_iter_stmt, n.body])); - - return b.blockStatement([tmp_iterable_decl, get_iterator_stmt, next_decl, while_stmt]); - } -} diff --git a/lib/passes/desugar-import-export.js b/lib/passes/desugar-import-export.js deleted file mode 100644 index 93102f26..00000000 --- a/lib/passes/desugar-import-export.js +++ /dev/null @@ -1,315 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import { startGenerator, intrinsic } from "../echo-util"; -import * as b from "../ast-builder"; -import { reportError, reportWarning } from "../errors"; -import { moduleGetSlot_id, moduleSetSlot_id, moduleGetExotic_id } from "../common-ids"; -import { TransformPass } from "../node-visitor"; - -let importGen = startGenerator(); -function freshId(prefix) { - return b.identifier(`%${prefix}_${importGen()}`); -} - -export class DesugarImportExport extends TransformPass { - constructor(options, filename, allModules) { - super(options); - this.allModules = allModules; - this.filename = filename; - } - - visitFunction(n) { - if (!n.toplevel) return n; - - this.exports = []; - this.batch_exports = []; - - n = super.visitFunction(n); - return this.rewritePromotedVars(n); - } - - // non-exported module-level vars that gather-imports promoted to - // hidden module slots: replace their declarations with - // %moduleSetSlot, exactly like exported declarations. new-cc's - // ModuleSlotBinding registration then routes every reference in - // this file through the slot -- the same storage the EIR pipeline - // uses. - rewritePromotedVars(toplevel) { - let module_info = this.allModules.get(this.filename); - if (!module_info) return toplevel; - - let isPromoted = (d) => { - if (d.id.type !== b.Identifier) return false; - let export_info = module_info.exports.get(d.id.name); - return !!(export_info && export_info.promoted); - }; - - let new_body = []; - for (let stmt of toplevel.body.body) { - if ((stmt.type === b.FunctionDeclaration || stmt.type === b.ClassDeclaration) && stmt.id) { - let export_info = module_info.exports.get(stmt.id.name); - if (export_info && export_info.promoted) { - // mirror the exported-declaration rewrite (the node is - // mutated in place so EIR tags survive) - stmt.type = - stmt.type === b.FunctionDeclaration - ? b.FunctionExpression - : b.ClassExpression; - new_body.push( - b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(stmt.id.name), - stmt, - ]) - ) - ); - continue; - } - } - if (stmt.type !== b.VariableDeclaration || !stmt.declarations.some(isPromoted)) { - new_body.push(stmt); - continue; - } - // split the declaration, preserving declarator evaluation order - let pending = []; - let flushPending = () => { - if (pending.length === 0) return; - new_body.push(b.variableDeclaration(stmt.kind, pending)); - pending = []; - }; - for (let d of stmt.declarations) { - if (!isPromoted(d)) { - pending.push(d); - continue; - } - flushPending(); - new_body.push( - b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(d.id.name), - d.init || b.undefinedLit(), - ]) - ) - ); - } - flushPending(); - } - toplevel.body.body = new_body; - return toplevel; - } - - visitImportDeclaration(n) { - if (n.specifiers.length === 0) { - // no specifiers, it's of the form: import from "foo" - // don't waste a decl for this type - return b.expressionStatement(intrinsic(moduleGetExotic_id, [n.source_path])); - } - - let import_decls = b.letDeclaration(); - let module = this.allModules.get(n.source_path.value); - - for (let spec of n.specifiers) { - if (spec.type === b.ImportDefaultSpecifier) { - // - // let ${spec.local} = %import_decl.default - // - if (!module.hasDefaultExport()) - reportError( - ReferenceError, - `module '${n.source_path.value}' doesn't have default export`, - this.filename, - n.loc - ); - - import_decls.declarations.push( - b.variableDeclarator( - spec.local, - intrinsic(moduleGetSlot_id, [n.source_path, b.literal("default")]) - ) - ); - } else if (spec.type === b.ImportSpecifier) { - // - // let ${spec.local} = %import_decl.#{spec.imported} - // - let imported_info = module.exports.get(spec.imported.name); - if (!imported_info || imported_info.promoted) - reportError( - ReferenceError, - `module '${n.source_path.value}' doesn't export '${spec.imported.name}'`, - this.filename, - spec.imported.loc - ); - import_decls.declarations.push( - b.variableDeclarator( - spec.local, - intrinsic(moduleGetSlot_id, [n.source_path, b.literal(spec.imported.name)]) - ) - ); - } else if (spec.type === b.ImportNamespaceSpecifier) { - // let #{spec.name} = %import_decl - import_decls.declarations.push( - b.variableDeclarator(spec.local, intrinsic(moduleGetExotic_id, [n.source_path])) - ); - } else { - reportError( - Error, - `unknown import specifier type ${spec.type}`, - this.filename, - n.loc - ); - } - } - return import_decls; - } - - visitExportDefaultDeclaration(n) { - // export default = ...; - // - return b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal("default"), - this.visit(n.declaration), - ]) - ); - } - - visitExportAllDeclaration(n) { - let import_tmp = freshId("import"); - let export_stuff = [ - b.letDeclaration(import_tmp, intrinsic(moduleGetExotic_id, [n.source_path])), - ]; - - this.batch_exports.push({ source: import_tmp, specifiers: [] }); - } - - visitExportNamedDeclaration(n) { - if (n.source) { - // export { ... } from "foo" - - // import the module regardless - let import_tmp = freshId("import"); - let export_stuff = [ - b.letDeclaration(import_tmp, intrinsic(moduleGetExotic_id, [n.source_path])), - ]; - - for (let spec of n.specifiers) { - let reexport_info = this.allModules.get(n.source_path.value).exports.get(spec.local.name); - if (!reexport_info || reexport_info.promoted) - reportError( - ReferenceError, - `module '${n.source_path.value}' doesn't export '${spec.exported.name}'`, - this.filename, - spec.local.loc - ); - - export_stuff.push( - b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(spec.exported.name), - b.memberExpression(import_tmp, spec.local), - ]) - ) - ); - } - return export_stuff; - } - - if (!n.declaration) { - // export { ... } - let export_stuff = []; - for (let spec of n.specifiers) { - export_stuff.push( - b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(spec.exported.name), - spec.local, - ]) - ) - ); - } - return export_stuff; - } - - // export function foo () { ... } - if (n.declaration.type === b.FunctionDeclaration) { - this.exports.push({ id: n.declaration.id }); - - // we're going to pass it to the moduleSetSlot intrinsic, so it needs to be an expression (or else escodegen freaks out) - n.declaration.type = b.FunctionExpression; - return b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(n.declaration.id.name), - this.visit(n.declaration), - ]) - ); - } - - // export class Foo () { ... } - if (n.declaration.type === b.ClassDeclaration) { - this.exports.push({ id: n.declaration.id }); - - n.declaration.type = b.ClassExpression; - return b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(n.declaration.id.name), - this.visit(n.declaration), - ]) - ); - } - - // export let foo = bar; - if (n.declaration.type === b.VariableDeclaration) { - let export_defines = []; - for (let decl of n.declaration.declarations) { - this.exports.push({ id: decl.id }); - export_defines.push( - b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(decl.id.name), - this.visit(decl.init), - ]) - ) - ); - } - return export_defines; - } - - // export foo = bar; - if (n.declaration.type === b.VariableDeclarator) { - this.exports.push({ id: n.declaration.id }); - return b.expressionStatement( - intrinsic(moduleSetSlot_id, [ - b.literal(this.filename), - b.literal(n.declaration.id.name), - this.visit(n.declaration), - ]) - ); - } - - reportError( - SyntaxError, - `Unsupported type of export declaration ${n.declaration.type}`, - this.filename, - n.loc - ); - } - - visitModuleDeclaration(n) { - // this isn't quite right. I believe this form creates - // a new instance and puts new properties on it that - // map to the module, instead of just returning the - // module object. - let init = intrinsic(moduleGetExotic_id, [n.source_path]); - return b.letDeclaration(n.id, init); - } -} diff --git a/lib/passes/desugar-let-loopvars.js b/lib/passes/desugar-let-loopvars.js deleted file mode 100644 index c3c65e25..00000000 --- a/lib/passes/desugar-let-loopvars.js +++ /dev/null @@ -1,174 +0,0 @@ -// we have a loop that looks like: -// -// for (let x = ...; $test; $update) { -// /* body */ -// } -// -// we desugar this to: -// -// for (var %loop_x = ...; $test(with x replaced with %loop_x); $update(with x replaced with %loop_x) { -// let x = %loop_x; -// try { -// /* body */ -// } -// finally { -// %loop_x = x; -// } -// } - -import * as b from "../ast-builder"; -import { Stack } from "../stack-es6"; -import { shallow_copy_object, startGenerator } from "../echo-util"; -import { TransformPass } from "../node-visitor"; - -let hasOwn = Object.prototype.hasOwnProperty; - -let vargen = startGenerator(); -function freshLoopVar(ident) { - return `%loop_${ident}_${vargen()}`; -} - -export class DesugarLetLoopVars extends TransformPass { - constructor(options, filename) { - super(options); - this.filename = filename; - } - - visitFor(n) { - // if the loop looks like: `for (; ...)` there's nothing for us to do - if (!n.init) return n; - - // if the loop looks like: `for (var i = 0; ...)` or `for (i = 0; ...)` there's nothing for us to do - if (n.init.type !== b.VariableDeclaration || n.init.kind !== "let") return n; - - n.init.kind = "var"; - - let mappings = Object.create(null); - - for (let decl of n.init.declarations) { - let loopvar = b.identifier(freshLoopVar(decl.id.name)); - mappings[decl.id.name] = loopvar; - decl.id = loopvar; - } - - let assignments = []; - let new_body = b.blockStatement(); - - for (let loopvar in mappings) { - // this gives us the "let x = %loop_x" - // assignments, so get our fresh binding per - // loop iteration - new_body.body.push( - b.variableDeclaration("let", b.identifier(loopvar), mappings[loopvar]) - ); - - // and this gives us the assignment we put in - // the finally block to capture changes made to - // the loop variable in the body - assignments.push( - b.expressionStatement( - b.assignmentExpression(mappings[loopvar], "=", b.identifier(loopvar)) - ) - ); - } - - new_body.body.push(b.tryStatement(n.body, [], b.blockStatement(assignments))); - - let remap = new RemapIdentifiers(this.options, this.filename, mappings); - n.test = remap.visit(n.test); - n.update = remap.visit(n.update); - - n.body = this.visit(new_body); - - return n; - } - - // for (let k in o) body → for (var %loop_k in o) { let k = %loop_k; body } - // - // unlike visitFor there's no copy-back through a finally: for-in - // creates a fresh binding each iteration (nothing carries over), so a - // fresh `let` initialized from the hoisted var is the whole story. - // without this, closures created in the body all shared one binding - // and saw the last key. - visitForIn(n) { - n.right = this.visit(n.right); - if ( - n.left.type !== b.VariableDeclaration || - n.left.kind === "var" || - n.left.declarations[0].id.type !== b.Identifier - ) { - n.body = this.visit(n.body); - return n; - } - - let kind = n.left.kind; // let or const - let decl = n.left.declarations[0]; - let orig = decl.id; - let loopvar = b.identifier(freshLoopVar(orig.name)); - decl.id = loopvar; - n.left.kind = "var"; - - let new_body = b.blockStatement(); - new_body.body.push(b.variableDeclaration(kind, orig, loopvar)); - new_body.body.push(n.body); - n.body = this.visit(new_body); - - return n; - } -} - -class RemapIdentifiers extends TransformPass { - constructor(options, filename, initial_mapping) { - super(options); - this.filename = filename; - this.mappings = new Stack(initial_mapping); - } - - visitBlock(n) { - // clone the mapping and push it onto the stack - this.mappings.push(shallow_copy_object(this.currentMapping())); - super.visitBlock(n); - this.mappings.pop(); - return n; - } - - visitVariableDeclarator(n) { - // if the variable's name exists in the mapping clear it out - this.currentMapping()[n.id.name] = null; - } - - visitObjectPattern(n) { - for (let prop of n.properties) this.currentMapping()[prop.key] = null; - super.visitObjectPattern(n); - } - - visitCatchClause(n) { - this.mappings.push(shallow_copy_object(this.currentMapping())); - this.currentMapping()[n.param.name] = null; - super.visitCatchClause(n); - this.mappings.pop(); - return n; - } - - visitFunction(n) { - if (n.id) this.currentMapping()[n.id.name] = null; - - this.mappings.push(shallow_copy_object(this.currentMapping())); - if (n.rest) this.currentMapping()[n.rest.name] = null; - super.visitFunction(n); - this.mappings.pop(); - return n; - } - - visitIdentifier(n) { - if (hasOwn.call(this.currentMapping(), n.name)) { - let mapped = this.currentMapping()[n.name]; - if (mapped) return mapped; - } - return n; - } - - currentMapping() { - return this.mappings.depth > 0 ? this.mappings.top : Object.create(null); - } -} diff --git a/lib/passes/desugar-rest-parameters.js b/lib/passes/desugar-rest-parameters.js deleted file mode 100644 index e7810f56..00000000 --- a/lib/passes/desugar-rest-parameters.js +++ /dev/null @@ -1,68 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// -// convert from: -// -// function name (arg1, arg2, arg3, ...rest) { -// // body -// } -// -// to: -// -// function name (arg1, arg2, arg3) { -// let rest = %arrayFromRest('rest', 3); -// // body -// } -// - -import { reportError } from "../errors"; -import { TransformPass } from "../node-visitor"; -import { arrayFromRest_id } from "../common-ids"; -import * as b from "../ast-builder"; - -export class DesugarRestParameters extends TransformPass { - visitProperty(n) { - if (n.kind !== "set") { - return super.visitProperty(n); - } - if (n.value.params.length > 0) { - let last_param = n.value.params[n.value.params.length - 1]; - if (last_param.type == b.RestElement) - reportError( - SyntaxError, - "Setters aren't allowed to have a rest", - this.filename, - last_param.loc - ); - } - n.value = super.visit(n.value); - return n; - } - - visitFunction(n) { - n = super.visitFunction(n); - if (n.params.length > 0 && n.params[n.params.length - 1].type == b.RestElement) { - let rest_argument = n.params[n.params.length - 1].argument; - n.params.pop(); - if (rest_argument.type !== b.Identifier) - reportError( - Error, - "we assume rest elements are of the form: ...Identifier", - this.filename, - rest_argument.argument.loc - ); - let rest_name = rest_argument.name; - let rest_declaration = b.letDeclaration( - b.identifier(rest_argument.name), - b.callExpression(arrayFromRest_id, [ - b.literal(rest_argument.name), - b.literal(n.params.length), - ]) - ); - n.body.body.unshift(rest_declaration); - } - return n; - } -} diff --git a/lib/passes/desugar-templates.js b/lib/passes/desugar-templates.js deleted file mode 100644 index 2181f4c7..00000000 --- a/lib/passes/desugar-templates.js +++ /dev/null @@ -1,91 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// for template strings without a tag (i.e. of the form -// `literal ${with}${possibly}${substitutions}`) we simply -// inline the spec'ed behavior of the default handler (zipping -// together the cooked values and substitutions to form the -// result.) -// -// for tagged templates: (i.e. of the form tag`literal`) we -// create a function which lazily generates the const/frozen -// callsite_id, which is a unique object containing both raw -// and cooked literal portions of the template literal. -// -// This function is invoked to get the callsiteId, which is -// then passed (along with the array of substitutions) to the -// handler named by "tag" above. -// - -import { startGenerator, intrinsic } from "../echo-util"; -import * as b from "../ast-builder"; -import { templateCallsite_id, templateDefaultHandlerCall_id } from "../common-ids"; -import { TransformPass } from "../node-visitor"; - -let callsiteGen = startGenerator(); -let freshCallsiteId = () => `%callsiteId_${callsiteGen()}`; - -export class DesugarTemplates extends TransformPass { - visitBlock(n, callsites) { - callsites = []; - n = super.visitBlock(n, callsites); - // prepend the callsite generation functions (generated by desugaring tagged template expressions below) - n.body = callsites.concat(n.body); - return n; - } - - generateCreateCallsiteIdFunc(name, quasis, loc) { - let raw_elements = []; - let cooked_elements = []; - for (let q of quasis) { - raw_elements.push(b.literal(q.value.raw)); - cooked_elements.push(b.literal(q.value.cooked)); - } - - let raw = b.arrayExpression(raw_elements); - let cooked = b.arrayExpression(cooked_elements); - - return b.functionDeclaration( - b.identifier(`generate_${name}`), - [], - b.blockStatement( - [ - b.expressionStatement( - intrinsic(templateCallsite_id, [b.literal(name), raw, cooked]) - ), - ], - loc - ), - [], - null, - loc - ); - } - - visitTaggedTemplateExpression(n, callsites) { - // visit the tag and the substitution expressions first: they can - // contain templates of their own (e.g. inside arrow functions), - // which would otherwise survive this pass undesugared. - n.tag = this.visit(n.tag); - n.quasi.expressions = n.quasi.expressions.map((e) => this.visit(e)); - - let callsiteid_func_id = freshCallsiteId(); - let callsite_func = this.generateCreateCallsiteIdFunc( - callsiteid_func_id, - n.quasi.quasis, - n.loc - ); - callsites.push(callsite_func); - let callsiteid_func_call = b.callExpression(callsite_func.id, []); - return b.callExpression(n.tag, [callsiteid_func_call].concat(n.quasi.expressions)); - } - - visitTemplateLiteral(n) { - // see visitTaggedTemplateExpression: substitutions must be visited - let expressions = n.expressions.map((e) => this.visit(e)); - let cooked = b.arrayExpression(n.quasis.map((q) => b.literal(q.value.cooked))); - let substitutions = b.arrayExpression(expressions); - return intrinsic(templateDefaultHandlerCall_id, [cooked, substitutions]); - } -} diff --git a/lib/passes/desugar-update-assignments.js b/lib/passes/desugar-update-assignments.js deleted file mode 100644 index c7c99a4a..00000000 --- a/lib/passes/desugar-update-assignments.js +++ /dev/null @@ -1,104 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// we split up assignment operators +=/-=/etc into their -// component operator + assignment so we can mark lhs as -// setLocal/setGlobal/etc, and rhs getLocal/getGlobal/etc - -import { TransformPass } from "../node-visitor"; -import { startGenerator } from "../echo-util"; -import * as b from "../ast-builder"; -import { reportError } from "../errors"; - -let updateGen = startGenerator(); -let freshUpdate = () => `%update_${updateGen()}`; - -export class DesugarUpdateAssignments extends TransformPass { - constructor(options) { - super(options); - this.debug = true; - this.updateGen = startGenerator(); - } - - visitProgram(n) { - n.prepends = []; - n = super.visitProgram(n, n); - if (n.prepends.length > 0) n.body = n.prepends.concat(n.body); - return n; - } - - visitBlock(n) { - n.prepends = []; - n = super.visitBlock(n, n); - if (n.prepends.length > 0) n.body = n.prepends.concat(n.body); - return n; - } - - visitAssignmentExpression(n, parentBlock) { - n = super.visitAssignmentExpression(n, parentBlock); - - // we only care about the $= operators, where $ = *,/,-,+,%,etc - if (n.operator.length === 1) return n; - - if (n.left.type === b.Identifier) { - // for identifiers we just expand a += b to a = a + b - // strip the trailing '=' ("<<=" -> "<<", not "<") - n.right = b.binaryExpression(n.left, n.operator.slice(0, -1), n.right); - n.operator = "="; - return n; - } - - if (n.left.type === b.MemberExpression) { - let complex_exp = (n) => { - if (!n) return false; - if (n.type === b.Literal) return false; - if (n.type === b.Identifier) return false; - return true; - }; - - let prepend_update = () => { - let update_id = b.identifier(freshUpdate()); - parentBlock.prepends.unshift(b.letDeclaration(update_id, b.undefinedLit())); - return update_id; - }; - - let object_exp = n.left.object; - let prop_exp = n.left.property; - - let expressions = []; - - if (complex_exp(object_exp)) { - let update_id = prepend_update(); - expressions.push(b.assignmentExpression(update_id, "=", object_exp)); - n.left.object = update_id; - } - - if (complex_exp(prop_exp)) { - let update_id = prepend_update(); - expressions.push(b.assignmentExpression(update_id, "=", prop_exp)); - n.left.property = update_id; - } - - n.right = b.binaryExpression( - b.memberExpression(n.left.object, n.left.property, n.left.computed), - n.operator.slice(0, -1), - n.right - ); - n.operator = "="; - - if (expressions.length !== 0) { - expressions.push(n); - return b.sequenceExpression(expressions); - } - - return n; - } - - reportError( - Error, - `unexpected expression type ${n.left.type} in update assign expression.`, - this.filename, - n.left.loc - ); - } -} diff --git a/lib/passes/eq-idioms.js b/lib/passes/eq-idioms.js deleted file mode 100644 index 9f9af38c..00000000 --- a/lib/passes/eq-idioms.js +++ /dev/null @@ -1,122 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// -// EqIdioms checks for the following things: -// -// typeof() checks against constant strings. -// -// For most cases we can inline the test directly into LLVM IR (in -// compiler.coffee), and in the cases where we can't easily, we can -// call specialized runtime builtins that don't require us to -// allocate a string do a comparison. -// -// ==/!= of constants null or undefined -// - -import { - typeofIsObject_id, - typeofIsFunction_id, - typeofIsString_id, - typeofIsSymbol_id, - typeofIsNumber_id, - typeofIsBoolean_id, - isNull_id, - isUndefined_id, - isNullOrUndefined_id, -} from "../common-ids"; -import * as b from "../ast-builder"; -import { is_intrinsic, create_intrinsic } from "../echo-util"; -import { TreeVisitor } from "../node-visitor"; - -function is_typeof(e) { - return e.type === b.UnaryExpression && e.operator === "typeof"; -} -function is_string_literal(e) { - return e.type === b.Literal && typeof e.value === "string"; -} -function is_undefined_literal(e) { - return e.type === b.Literal && e.value === undefined; -} -function is_null_literal(e) { - return e.type === b.Literal && e.value === null; -} -function is_null_or_undefined_literal(e) { - return is_undefined_literal(e) || is_null_literal(e); -} - -function eq_neq_op(op) { - return op === "==" || op === "!=" || op === "===" || op === "!=="; -} - -function op_coerces(op) { - return op.length == 2; -} - -function maybe_not(op, exp) { - if (op[0] === "!") { - return b.unaryExpression("!", exp); - } - return exp; -} - -const typecheckIntrinsics = { - object: typeofIsObject_id, - function: typeofIsFunction_id, - string: typeofIsString_id, - symbol: typeofIsSymbol_id, - number: typeofIsNumber_id, - boolean: typeofIsBoolean_id, - null: isNull_id, - undefined: isUndefined_id, -}; - -export class EqIdioms extends TreeVisitor { - visitBinaryExpression(exp) { - if (!eq_neq_op(exp.operator)) { - return super.visitBinaryExpression(exp); - } - - let left = exp.left; - let right = exp.right; - - // for typeof checks against string literals, both == && === work - if ( - (is_typeof(left) && is_string_literal(right)) || - (is_typeof(right) && is_string_literal(left)) - ) { - let typecheck = is_typeof(left) ? right.value : left.value; - let typeofarg = is_typeof(left) ? left.argument : right.argument; - - let intrinsic = typecheckIntrisics[typecheck]; - if (!intrinsic) { - throw new Error(`invalid typeof check against '${typecheck}'`); - } - - return maybe_not(exp.operator, create_intrinsic(intrinsic, [typeofarg])); - } - - // check for null/undefined comparisons - if (!is_null_or_undefined_literal(left) && !is_null_or_undefined_literal(right)) { - return super.visitBinaryExpression(exp); - } - - // one or both of subexpressions are null/undefined literals - - if (op_coerces(exp.operator)) { - // == or != here, so we need to match both (hence isNullOrUndefined). - let checkarg = is_null_or_undefined_literal(left) ? right : left; - return maybe_not(exp.operator, create_intrinsic(isNullOrUndefined_id, [checkarg])); - } - - // === or !== below here. at least one of left/right is either null or undefined literal - if (is_null_literal(left) || is_null_literal(right)) { - let checkarg = is_null_literal(left) ? right : left; - return maybe_not(exp.operator, create_intrinsic(isNull_id, [checkarg])); - } - - // === or !== below here. at least one of left/right is undefined literal - let checkarg = is_undefined_literal(left) ? right : left; - return maybe_not(exp.operator, create_intrinsic(isUndefined_id, [checkarg])); - } -} diff --git a/lib/passes/func-decls-to-vars.js b/lib/passes/func-decls-to-vars.js deleted file mode 100644 index 20051146..00000000 --- a/lib/passes/func-decls-to-vars.js +++ /dev/null @@ -1,29 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// convert all function declarations to variable assignments -// with named function expressions. -// -// i.e. from: -// function foo() { } -// to: -// var foo = function foo() { } -// - -import * as b from "../ast-builder"; -import { TransformPass } from "../node-visitor"; - -export class FuncDeclsToVars extends TransformPass { - visitFunctionDeclaration(n) { - if (n.toplevel) { - n.body = this.visit(n.body); - return n; - } else { - let func_exp = n; - func_exp.type = b.FunctionExpression; - func_exp.body = this.visit(func_exp.body); - return b.varDeclaration(b.identifier(n.id.name), func_exp); - } - } -} diff --git a/lib/passes/hoist-vars.js b/lib/passes/hoist-vars.js deleted file mode 100644 index 3dc1cdfe..00000000 --- a/lib/passes/hoist-vars.js +++ /dev/null @@ -1,134 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// hoists all vars to the start of the enclosing function, replacing -// any initializer with an assignment expression. We also take the -// opportunity to convert the vars to lets at this point so by the time -// the LLVMIRVisitory gets to the tree there are only consts and lets -// -// i.e. from -// { -// .... -// var x = 5; -// .... -// } -// to -// { -// let x; -// .... -// x = 5; -// .... -// } -// -// we also warn if x was already hoisted (if the decl for it already exists in the toplevel scope) - -import * as b from "../ast-builder"; -import { TransformPass } from "../node-visitor"; -import { Stack } from "../stack-es6"; -import { reportWarning } from "../errors"; - -function create_empty_declarator(decl_name) { - return b.variableDeclarator(b.identifier(decl_name), b.undefinedLit()); -} - -export class HoistVars extends TransformPass { - constructor(options, filename) { - super(options); - this.filename = filename; - this.scope_stack = new Stack(); - } - - visitProgram(n) { - let vars = new Set(); - this.scope_stack.push({ func: n, vars: vars }); - n = super.visitProgram(n); - this.scope_stack.pop(); - - if (vars.size === 0) return n; - - let empty_declarators = []; - vars.forEach((varname) => empty_declarators.push(create_empty_declarator(varname))); - n.body.unshift(b.letDeclaration(empty_declarators)); - return n; - } - - visitFunction(n) { - let vars = new Set(); - this.scope_stack.push({ func: n, vars: vars }); - n = super.visitFunction(n); - this.scope_stack.pop(); - - if (vars.size === 0) return n; - - let empty_declarators = []; - vars.forEach((varname) => empty_declarators.push(create_empty_declarator(varname))); - n.body.body.unshift(b.letDeclaration(empty_declarators)); - - return n; - } - - visitFor(n) { - this.skipExpressionStatement = true; - n.init = this.visit(n.init); - this.skipExpressionStatement = false; - n.test = this.visit(n.test); - n.update = this.visit(n.update); - n.body = this.visit(n.body); - return n; - } - - visitForIn(n) { - if (n.left.type === b.VariableDeclaration) { - this.scope_stack.top.vars.add(n.left.declarations[0].id.name); - n.left = b.identifier(n.left.declarations[0].id.name); - } - n.right = this.visit(n.right); - n.body = this.visit(n.body); - return n; - } - - visitForOf(n) { - if (n.left.type === b.VariableDeclaration) { - this.scope_stack.top.vars.add(n.left.declarations[0].id.name); - n.left = b.identifier(n.left.declarations[0].id.name); - } - n.right = this.visit(n.right); - n.body = this.visit(n.body); - return n; - } - - visitVariableDeclaration(n) { - if (n.kind !== "var") return super.visitVariableDeclaration(n); // we only need to do this for var decls. - - // check to see if there are any initializers, which we'll convert to assignment expressions - let assignments = []; - n.declarations.forEach((decl) => { - if (decl.init) - assignments.push( - b.assignmentExpression(b.identifier(decl.id.name), "=", this.visit(decl.init)) - ); - }); - - // vars are hoisted to the containing function's toplevel scope - for (let decl of n.declarations) { - if (this.scope_stack.top.vars.has(decl.id.name)) - reportWarning( - `multiple var declarations for '${decl.id.name}' in this function.`, - this.filename, - n.loc - ); - this.scope_stack.top.vars.add(decl.id.name); - } - - if (assignments.length === 0) return b.emptyStatement(); - - let assign_exp; - // now return the new assignments, which will replace the original variable - // declaration node. - if (assignments.length > 1) assign_exp = b.sequenceExpression(assignments); - else assign_exp = assignments[0]; - - if (this.skipExpressionStatement) return assign_exp; - else return b.expressionStatement(assign_exp); - } -} diff --git a/lib/passes/iife-idioms.js b/lib/passes/iife-idioms.js deleted file mode 100644 index 2d57208d..00000000 --- a/lib/passes/iife-idioms.js +++ /dev/null @@ -1,180 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// -// special pass to inline some common idioms dealing with IIFEs -// (immediately invoked function expressions). -// -// (function(x1, x2, ...) { ... body ... }(y1, y2, ...); -// -// This is a common way to provide scoping in ES5 and earlier. It is -// unnecessary with the addition of 'let' in ES6. We assume that all -// bindings in 'body' have been replace by 'let' or 'const' (meaning -// that all hoisting has been done.) -// -// we translate this form into the following equivalent inlined form: -// -// { -// let x1 = y1; -// let x2 = y2; -// -// ... -// -// { ... body ... } -// } -// -// we limit the inlining to those where count(y) <= count(x). -// otherwise we'd need to ensure that the evaluation of the extra y's -// takes place before the body is executed, even if they aren't used. -// -// Another form we can optimize is the following: -// -// (function() { body }).call(this) -// -// this form can be inlined directly as: -// -// { body } -// - -import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; - -import * as b from "../ast-builder"; -import { Stack } from "../stack-es6"; -import { startGenerator, is_intrinsic, intrinsic } from "../echo-util"; - -import { TransformPass } from "../node-visitor"; - -import { getLocal_id } from "../common-ids"; - -export class IIFEIdioms extends TransformPass { - constructor(options) { - super(options); - this.function_stack = new Stack(); - this.iife_generator = startGenerator(); - } - - visitFunction(n) { - this.function_stack.push(n); - let rv = super.visitFunction(n); - this.function_stack.pop(); - return rv; - } - - maybeInlineIIFE(candidate, n) { - let arity = candidate.arguments[0].arguments[1].params.length; - let arg_count = candidate.arguments.length - 1; // %invokeClosure's first arg is the callee - - if (arg_count > arity) return n; - - // at this point we know we have an IIFE in an expression statement, ala: - // - // (function(x, ...) { ...body...})(y, ...); - // - // so just inline { ...body... } in place of the - // expression statement, after doing some magic to fix - // up argument bindings (done here) and return - // statements in the body (done in LLVMIRVisitor). - // - let iife_rv_id = b.identifier(`%iife_rv_${this.iife_generator()}`); - - let replacement = b.blockStatement(); - - replacement.body.push(b.letDeclaration(iife_rv_id, b.undefinedLit())); - - for (let i = 0; i < arity; i++) { - replacement.body.push( - b.letDeclaration( - candidate.arguments[0].arguments[1].params[i], - i < arg_count ? candidate.arguments[i + 1] : b.undefinedLit() - ) - ); - } - - this.function_stack.top.scratch_size = Math.max( - this.function_stack.top.scratch_size, - candidate.arguments[0].arguments[1].scratch_size - ); - - let body = candidate.arguments[0].arguments[1].body; - body.ejs_iife_rv = iife_rv_id; - body.fromIIFE = true; - - replacement.body.push(body); - - if (is_intrinsic(n.expression, "%setSlot")) { - n.expression.arguments[2] = intrinsic(getLocal_id, [iife_rv_id]); - replacement.body.push(n); - } else if ( - is_intrinsic(n.expression, "%setGlobal") || - is_intrinsic(n.expression, "%setLocal") - ) { - n.expression.arguments[1] = intrinsic(getLocal_id, [iife_rv_id]); - replacement.body.push(n); - } - - return replacement; - } - - maybeInlineIIFECall(candidate, n) { - if (candidate.arguments.length !== 2 || candidate.arguments[1].type !== b.ThisExpression) - return n; - - let iife_rv_id = b.identifier(`%iife_rv_${this.iife_generator()}`); - - let replacement = b.blockStatement(); - - replacement.body.push(b.letDeclaration(iife_rv_id, b.undefinedLit())); - - let body = candidate.arguments[0].object.arguments[1].body; - body.ejs_iife_rv = iife_rv_id; - body.fromIIFE = true; - - replacement.body.push(body); - - if (is_intrinsic(n.expression, "%setSlot")) { - n.expression.arguments[2] = intrinsic(getLocal_id, [iife_rv_id]); - replacement.body.push(n); - } else if ( - is_intrinsic(n.expression, "%setGlobal") || - is_intrinsic(n.expression, "%setLocal") - ) { - n.expression.arguments[1] = intrinsic(getLocal_id, [iife_rv_id]); - replacement.body.push(n); - } - - return replacement; - } - - visitExpressionStatement(n) { - let isMakeClosure = (a) => - is_intrinsic(a, "%makeClosure") || - is_intrinsic(a, "%makeAnonClosure") || - is_intrinsic(a, "%makeClosureNoEnv"); - - let candidate; - // bail out early if we know we aren't in the right place - if (is_intrinsic(n.expression, "%invokeClosure")) candidate = n.expression; - else if (is_intrinsic(n.expression, "%setSlot")) candidate = n.expression.arguments[2]; - else if ( - is_intrinsic(n.expression, "%setGlobal") || - is_intrinsic(n.expression, "%setLocal") - ) - candidate = n.expression.arguments[1]; - else return n; - - // at this point candidate should only be an invokeClosure intrinsic - if (!is_intrinsic(candidate, "%invokeClosure")) return n; - - if (isMakeClosure(candidate.arguments[0])) { - return this.maybeInlineIIFE(candidate, n); - } else if ( - candidate.arguments[0].type === b.MemberExpression && - isMakeClosure(candidate.arguments[0].object) && - candidate.arguments[0].property.name === "call" - ) { - return this.maybeInlineIIFECall(candidate, n); - } else { - return n; - } - } -} diff --git a/lib/passes/lambda-lift.js b/lib/passes/lambda-lift.js deleted file mode 100644 index 83d2f646..00000000 --- a/lib/passes/lambda-lift.js +++ /dev/null @@ -1,66 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// -// This pass walks the tree and moves all function expressions to the toplevel. -// -// at the point where this pass runs there are a couple of assumptions: -// -// 1. there are no function declarations anywhere in the program. They have all -// been converted to 'var X = %makeClosure(%env_Y, function (%env) { ... })' -// -// 2. There are no free variables in the function expressions. -// - -import * as b from "../ast-builder"; -import { intrinsic, genGlobalFunctionName, genAnonymousFunctionName } from "../echo-util"; - -import { createArgScratchArea_id } from "../common-ids"; -import { TransformPass } from "../node-visitor"; - -export class LambdaLift extends TransformPass { - constructor(options, filename) { - super(options); - this.filename = filename; - this.functions = []; - } - - visitProgram(n) { - n = super.visitProgram(n); - n.body = this.functions.concat(n.body); - return n; - } - - maybePrependScratchArea(n) { - if (n.scratch_size > 0) - n.body.body.unshift( - b.expressionStatement( - intrinsic(createArgScratchArea_id, [b.literal(n.scratch_size)]) - ) - ); - } - - visitFunctionDeclaration(n) { - n.body = this.visit(n.body); - this.maybePrependScratchArea(n); - return n; - } - - visitFunctionExpression(n) { - let global_name; - if (n.displayName) global_name = genGlobalFunctionName(n.displayName, this.filename); - else if (n.id && n.id.name) global_name = genGlobalFunctionName(n.id.name, this.filename); - else global_name = genAnonymousFunctionName(this.filename); - - n.type = b.FunctionDeclaration; - n.id = b.identifier(global_name); - - this.functions.push(n); - - n.body = this.visit(n.body); - - this.maybePrependScratchArea(n); - - return b.identifier(global_name); - } -} diff --git a/lib/passes/name-anonymous-functions.js b/lib/passes/name-anonymous-functions.js deleted file mode 100644 index ec286f71..00000000 --- a/lib/passes/name-anonymous-functions.js +++ /dev/null @@ -1,34 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import { TransformPass } from "../node-visitor"; -import * as b from "../ast-builder"; - -import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; - -export class NameAnonymousFunctions extends TransformPass { - visitAssignmentExpression(n) { - n = super.visitAssignmentExpression(n); - let lhs = n.left; - let rhs = n.right; - - // if we have the form - // = function () { } - // convert to: - // = function () { } - // if lhs.type is Identifier and rhs.type is FunctionExpression and not rhs.id?.name - // rhs.display = - // - let rhs_name = null; - if (rhs.id) rhs_name = rhs.id.name; - if (rhs.type === b.FunctionExpression && !rhs_name) - rhs.displayName = escodegen.generate(lhs); - return n; - } - - visitFunction(n) { - if (n.id && n.id.name) n.displayName = n.id.name; - return super.visitFunction(n); - } -} diff --git a/lib/passes/new-cc.js b/lib/passes/new-cc.js deleted file mode 100644 index 0d00fbe7..00000000 --- a/lib/passes/new-cc.js +++ /dev/null @@ -1,1164 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; - -import * as b from "../ast-builder"; - -import * as debug from "../debug"; - -import { reportError, reportWarning } from "../errors"; - -import { createGlobalsInterface } from "../runtime"; - -let runtime_globals = createGlobalsInterface(null); - -import { Stack } from "../stack-es6"; -import { TransformPass, TreeVisitor } from "../node-visitor"; - -import { - genGlobalFunctionName, - genAnonymousFunctionName, - shallow_copy_object, - map, - foldl, - reject, - is_intrinsic, - is_string_literal, - intrinsic, - startGenerator, -} from "../echo-util"; - -let hasOwnProperty = Object.prototype.hasOwnProperty; - -import { - arrayFromSpread_id, - constructSuper_id, - constructSuperApply_id, - getGlobal_id, - getLocal_id, - invokeClosure_id, - constructClosure_id, - makeAnonClosure_id, - makeClosureEnv_id, - makeClosure_id, - makeClosureNoEnv_id, - setGlobal_id, - setLocal_id, - moduleGetSlot_id, - moduleSetSlot_id, - moduleGetExotic_id, - setSlot_id, - slot_id, -} from "../common-ids"; - -function assignStmt(l, op, r) { - return b.expressionStatement(b.assignmentExpression(l, op, r)); -} - -function slotIntrinsic(name, slot) { - return intrinsic(slot_id, [b.identifier(name), b.literal(slot)]); -} - -function setSlotIntrinsic(name, slot, value) { - try { - return intrinsic(setSlot_id, [b.identifier(name), b.literal(slot), value]); - } catch (e) { - console.log("invalid setSlot intrinsic:"); - console.log(`name = ${name}`); - console.log(`slot = ${slot}`); - console.log(`value = ${JSON.stringify(value)}`); - return null; - } -} - -function is_getset_intrinsic(n) { - if (!is_intrinsic(n)) return false; - if ( - n.callee.name === slot_id.name || - n.callee.name === getLocal_id.name || - n.callee.name === getGlobal_id.name - ) - return true; - if ( - n.callee.name === setSlot_id.name || - n.callee.name === setLocal_id.name || - n.callee.name === setGlobal_id.name - ) - return true; - return false; -} - -class Location { - constructor(block, func) { - this.block = block; - this.func = func; - } -} - -// figure out a better way to make a private static -let scope_id = 0; - -class Scope { - constructor(location) { - this.location = location; - this.bindings = new Map(); // the identifiers declared in this scope, mapping from string(name) -> Binding - this.referents = new Map(); // the references (rooted in other scopes) to identifiers declared in this scope, mapping from string(name) -> [Reference] - this.references = new Map(); // the references rooted in this scope, mapping from string(name) -> [Reference] - this.scope_id = scope_id; - this.parentScope = null; - this.children = []; - scope_id += 1; - } - - addBinding(binding) { - this.bindings.set(binding.name, binding); - binding.declaringScope = this; - } - getBinding(name) { - return this.bindings.get(name); - } - hasBinding(name) { - return this.bindings.has(name); - } - - addReferent(ref) { - let reflist = this.referents.get(ref.binding.name); - if (!reflist) { - reflist = []; - this.referents.set(ref.binding.name, reflist); - } - reflist.push(ref); - } - getReferents(name) { - return this.referents.get(name); - } - hasReferents(name) { - return this.referents.has(name); - } - - addReference(ref) { - this.references.set(ref.binding.name, ref); - ref.referencingScope = this; - if (ref.binding.type === "local" || ref.binding.type === "arg") - ref.binding.declaringScope.addReferent(ref); - } - getReference(name) { - return this.references.get(name); - } - hasReference(name) { - return this.references.has(name); - } - - isFunctionBodyScope() { - return this.location.block === this.location.func.body; - } - isAncestorOf(s) { - let _s = this.parentScope; - while (_s) { - if (_s === s) return true; - _s = _s.parentScope; - } - return false; - } - - differentFunction(otherscope) { - return this.location.func !== otherscope.location.func; - } - - debugString() { - let str = `scope `; - if (this.location.block.loc) str = `#{str} at line ${this.location.block.loc.start.line}`; - if (this.isFunctionBodyScope()) str = `${str} : for function ${this.location.func.id.name}`; - if (this.env) str = `${str} : environment = ${this.env.name}`; - return str; - } -} - -class Binding { - constructor(name, type, is_const) { - this.name = name; - this.type = type; - this.is_const = is_const; - } -} - -class LocalBinding extends Binding { - constructor(name, is_const) { - super(name, "local", is_const); - } -} - -class GlobalBinding extends Binding { - constructor(name, is_const) { - super(name, "global", is_const); - } -} - -class ModuleSlotBinding extends Binding { - constructor(moduleString, moduleExport, name, is_const) { - super(name, "module", is_const); - this.moduleString = moduleString; - this.moduleExport = moduleExport; - } - - getLoadIntrinsic() { - return intrinsic(moduleGetSlot_id, [this.moduleString, this.moduleExport]); - } - getStoreIntrinsic(val) { - return intrinsic(moduleSetSlot_id, [this.moduleString, this.moduleExport, val]); - } - - toString() { - return `moduleSlot(${this.moduleString.value} - ${this.moduleExport.value})`; - } -} - -class ModuleExoticBinding extends Binding { - constructor(moduleString, name, is_const) { - super(name, "module-exotic", is_const); - this.moduleString = moduleString; - } - - getLoadIntrinsic() { - return intrinsic(moduleGetExotic_id, [this.moduleString]); - } - // no store intrinsic -} - -class Reference { - constructor(binding) { - this.binding = binding; - } -} - -class Environment { - constructor(id, level) { - this.id = id; - this.level = level; - this.name = `%env_${this.id}`; - this.slot_map = new Map(); - this.parentEnv = null; - } - - hasSlots() { - return this.slot_map.size > 0; - } - hasSlot(name) { - return this.slot_map.has(name); - } - getSlot(name) { - let rv = this.slot_map.get(name); - if (rv === undefined) - throw new Error(`environment ${this.name} does not contain slot for ${name}`); - return rv; - } - - addSlot(name) { - if (this.slot_map.has(name)) return; - this.slot_map.set(name, this.slot_map.size); - } - - slotCount() { - return this.slot_map.size; - } - - addChild(env) { - if (!env) throw new Error("invalid null child"); - if (env.parentEnv && env.parentEnv !== this) - throw new Error( - `attempting to set parent of ${env.name} to ${this.name}, but it already has a a parent, ${env.parentEnv.name}` - ); - env.addSlot(this.name); - env.parentEnv = this; - } - - toString() { - return this.name; - } -} - -let allFunctions = []; - -let global_bindings = new Map(); - -class SubstituteVariables extends TransformPass { - constructor(options, filename, allModules) { - super(options, filename); - this.allModules = allModules; - this.filename = filename; - this.options = options; - this.current_scope = null; - } - - visitBlock(n) { - this.current_scope = n.scope; - super.visitBlock(n); - this.current_scope = this.current_scope.parentScope; - return n; - } - - env_name() { - return this.current_scope.env.name; - } - env_slot(name) { - return this.current_scope.env.getSlot(name); - } - - visitVariableDeclaration(n) { - if (n.declarations.length > 1) - throw new Error("VariableDeclarations should only have 1 declarator at this point"); - let decl = n.declarations[0]; - - decl.init = this.visit(decl.init); - // don't visit the id - - let referents = this.current_scope.getReferents(decl.id.name); - if (referents) { - for (let referent of referents) { - if (referent.referencingScope.differentFunction(this.current_scope)) { - // it's closed over, so we need to set it in our allocated environment - return b.expressionStatement( - setSlotIntrinsic( - this.env_name(), - this.env_slot(decl.id.name), - decl.init || b.undefinedLit() - ) - ); - } - } - } - return n; - } - - visitCallExpression(n) { - // if it's one of our get/set Slot/Local/Global intrinsics, bail - if (is_getset_intrinsic(n)) return n; - - // otherwise we need to visit the args - if (is_intrinsic(n)) { - n.arguments = this.visit(n.arguments); - if (is_intrinsic(n, constructSuperApply_id.name)) - this.current_scope.location.func.scratch_size = Math.max( - this.current_scope.location.func.scratch_size, - n.arguments.length + 1 - ); - else if (is_intrinsic(n, constructSuper_id.name)) - this.current_scope.location.func.scratch_size = Math.max( - this.current_scope.location.func.scratch_size, - n.arguments.length + 1 - ); - else if (is_intrinsic(n, arrayFromSpread_id.name)) - this.current_scope.location.func.scratch_size = Math.max( - this.current_scope.location.func.scratch_size, - n.arguments.length + 1 - ); - return n; - } - - n = super.visitCallExpression(n); - this.current_scope.location.func.scratch_size = Math.max( - this.current_scope.location.func.scratch_size, - n.arguments.length + 1 - ); - let rv = intrinsic(invokeClosure_id, [n.callee].concat(n.arguments)); - rv.loc = n.loc; - return rv; - } - - visitNewExpression(n) { - n = super.visitNewExpression(n); - - this.current_scope.location.func.scratch_size = Math.max( - this.current_scope.location.func.scratch_size, - n.arguments.length + 1 - ); - - let rv = intrinsic(constructClosure_id, [n.callee].concat(n.arguments)); - rv.loc = n.loc; - return rv; - } - - visitFunction(n) { - n.scratch_size = 0; - n.body = this.visit(n.body); - - if (n.toplevel) return n; - - if (n.type === b.FunctionDeclaration) - throw new Error("there should be no FunctionDeclarations at this point"); - - let intrinsic_args = []; - let intrinsic_id; - - if (n.id) { - intrinsic_id = makeClosure_id; - if (n.params[0].name === "%env_unused") intrinsic_id = makeClosureNoEnv_id; - else intrinsic_args.push(b.identifier(n.params[0].name, n.loc)); - - if (n.id.type === b.Identifier) intrinsic_args.push(b.literal(n.id.name)); - else intrinsic_args.push(b.literal(escodegen.generate(n.id))); - } else { - intrinsic_id = makeAnonClosure_id; - if (n.params[0].name === "%env_unused") intrinsic_args.push(b.undefinedLit()); - else intrinsic_args.push(b.identifier(n.params[0].name, n.loc)); - } - - intrinsic_args.push(n); - - return intrinsic(intrinsic_id, intrinsic_args); - } - - visitAssignmentExpression(n) { - if (n.left.type !== b.Identifier) return super.visitAssignmentExpression(n); - - let rhs = this.visit(n.right); - let leftname = n.left.name; - - let referents = this.current_scope.getReferents(leftname); - if (referents) { - for (let referent of referents) { - if (referent.referencingScope.differentFunction(this.current_scope)) { - // it's closed over, so we need to set it in our allocated environment - let rv = setSlotIntrinsic(this.env_name(), this.env_slot(leftname), rhs); - rv.loc = n.loc; - return rv; - } - } - } else if (this.current_scope.hasReference(leftname)) { - let ref = this.current_scope.getReference(leftname); - if (ref.binding.type === "local" || ref.binding.type === "arg") { - let declaringScope = ref.binding.declaringScope; - let declaringEnv = declaringScope.env; - if (declaringEnv && declaringEnv.hasSlot(leftname)) { - let rv = setSlotIntrinsic( - declaringEnv.name, - declaringEnv.getSlot(leftname), - rhs - ); - rv.loc = n.loc; - return rv; - } else { - let rv = intrinsic(setLocal_id, [n.left, rhs]); - rv.loc = n.loc; - return rv; - } - } else if (ref.binding.type === "global") { - if (leftname === "undefined") - reportError( - SyntaxError, - "reassigning 'undefined' not permitted.", - this.filename, - n.loc - ); - let rv = intrinsic(setGlobal_id, [n.left, rhs]); - rv.loc = n.loc; - return rv; - } else if (ref.binding.type === "module") { - // rhs was already visited above; visiting it again - // double-wraps closures (and the second visitFunction - // resets the inner function's scratch_size) - let rv = ref.binding.getStoreIntrinsic(rhs); - rv.loc = n.loc; - return rv; - } else { - throw new Error(`unhandled binding type ${ref.binding.type}`); - } - } - - let rv = intrinsic(setLocal_id, [n.left, rhs]); - rv.loc = n.loc; - return rv; - } - - visitIdentifier(n) { - let referents = this.current_scope.getReferents(n.name); - if (referents) { - for (let referent of referents) { - if (referent.referencingScope.differentFunction(this.current_scope)) { - // it's closed over, so we need to set it in our allocated environment - return slotIntrinsic(this.env_name(), this.env_slot(n.name)); - } - } - } else if (this.current_scope.hasReference(n.name)) { - let ref = this.current_scope.getReference(n.name); - let binding = ref.binding; - if (binding.type === "local" || binding.type === "arg") { - let declaringScope = binding.declaringScope; - let declaringEnv = declaringScope.env; - - if (declaringEnv && declaringEnv.hasSlot(n.name)) { - let rv = slotIntrinsic(declaringEnv.name, declaringEnv.getSlot(n.name)); - rv.loc = n.loc; - return rv; - } else { - let rv = intrinsic(getLocal_id, [n]); - rv.loc = n.loc; - return rv; - } - } else if (binding.type === "global") { - let rv = intrinsic(getGlobal_id, [n]); - rv.loc = n.loc; - return rv; - } else if (binding.type === "module") { - // check if the export is const+literal. if it is, just propagate it here - let module_info = this.allModules.get(binding.moduleString.value); - let export_info = module_info.exports.get(binding.moduleExport.value); - if (export_info.constval) return export_info.constval; - return binding.getLoadIntrinsic(); - } else if (binding.type === "module-exotic") { - let rv = binding.getLoadIntrinsic(); - rv.loc = n.loc; - return rv; - } else { - throw new Error(`unhandled binding type ${binding.type}`); - } - } - let rv = intrinsic(getLocal_id, [n]); - rv.loc = n.loc; - return rv; - } - - visitMemberExpression(n) { - n = super.visitMemberExpression(n); - - if (!is_intrinsic(n.object, "%moduleGetExotic")) return n; - if (n.property.type !== b.Identifier && !is_string_literal(n.property)) return n; - - let moduleString = n.object.arguments[0]; - let moduleExport = n.property.type === b.Identifier ? n.property.name : n.property.raw; - - if (moduleString.value[0] === "@") return n; - if (!this.allModules.has(moduleString.value)) return n; - - // we have a member expression where the object is a module - // exotic and the property is either an identifier or a string - // literal, both of which we can resolve at compile time. - // - // rewrite it to use moduleGetSlot. - - let module_info = this.allModules.get(moduleString.value); - let export_info = module_info.exports.get(moduleExport); - if (!export_info || export_info.promoted) - throw new Error(`${moduleString.value} doesn't export ${moduleExport}`); // XXX - - let rv = intrinsic(moduleGetSlot_id, [moduleString, b.literal(moduleExport)]); - rv.loc = n.loc; - return rv; - } - - visitObjectExpression(n) { - for (let property of n.properties) { - if (property.computed) property.key = this.visit(property.key); - property.value = this.visit(property.value); - } - return n; - } - - visitCatchClause(n) { - // don't visit the parameter here or else we'll try to rewrite it as %get*(param-name) - n.body = this.visitBlock(n.body); - return n; - } - - visitLabeledStatement(n) { - // we need to override this method so we can skip the identifier being used as the label - n.body = this.visit(n.body); - return n; - } -} - -class FlattenDeclarations extends TransformPass { - constructor(options, filename, allModules) { - super(options, filename); - this.filename = filename; - this.allModules = allModules; - } - - visitBlock(n) { - let decl_map = new Map(); - n = super.visitBlock(n, decl_map); - let new_body = []; - for (let s of n.body) { - if (decl_map.has(s)) new_body = new_body.concat(decl_map.get(s)); - else new_body.push(s); - } - n.body = new_body; - return n; - } - - visitVariableDeclaration(n, decl_map) { - if (n.declarations.length == 1) return super.visitVariableDeclaration(n, decl_map); - - let decl_replacement = []; - for (let decl of n.declarations) - decl_replacement.push( - b.variableDeclaration( - n.kind, - decl.id, - decl.init ? this.visit(decl.init) : b.undefinedLit() - ) - ); - - decl_map.set(n, decl_replacement); - return n; - } -} - -class CollectScopeNestingInfo extends TransformPass { - constructor(options, filename, allModules) { - super(options, filename); - this.options = options; - this.filename = filename; - this.allModules = allModules; - this.block_stack = new Stack(); - this.func_stack = new Stack(); - this.current_scope = null; - this.root_scope = null; - } - - visitVariableDeclarator(n) { - // skip the id - n.init = this.visit(n.init); - return n; - } - - doWithScope(scope, fn) { - scope.parentScope = this.current_scope; - if (this.current_scope) this.current_scope.children.push(scope); - this.current_scope = scope; - fn(); - this.current_scope = scope.parentScope; - } - - doWithBlock(n, fn) { - this.block_stack.push(n); - fn(); - this.block_stack.pop(); - } - - doWithFunc(n, fn) { - this.func_stack.push(n); - fn(); - this.func_stack.pop(); - } - - createBindingsForScope(block, for_scope) { - for (let s of block.body) { - if (s.type === b.VariableDeclaration) { - // we're guaranteed to have variable declarations with a single declarator by the FlattenDeclarations pass - let d = s.declarations[0]; - if (d.init) { - if (is_intrinsic(d.init, "%moduleGetSlot")) { - for_scope.addBinding( - new ModuleSlotBinding( - d.init.arguments[0], - d.init.arguments[1], - d.id.name - ) - ); - // we inline module slot loads at all their use points, so we no longer need this decl at all - s.type = b.EmptyStatement; - } else if (is_intrinsic(d.init, "%moduleGetExotic")) { - for_scope.addBinding( - new ModuleExoticBinding(d.init.arguments[0], d.id.name) - ); - } else { - for_scope.addBinding(new LocalBinding(d.id.name, s.kind === "const")); - } - } else { - for_scope.addBinding(new LocalBinding(d.id.name, s.kind === "const")); - } - } else if (s.type === b.FunctionDeclaration && s.id) { - for_scope.addBinding(new LocalBinding(s.id.name, false, for_scope)); - } else if ( - s.type === b.ExpressionStatement && - is_intrinsic(s.expression, "%moduleSetSlot") - ) { - let args = s.expression.arguments; - // a re-export (`export { X }` where X is an import) emits a - // moduleSetSlot whose name is already bound to the imported - // module's slot. registering our own module's binding over - // it would make every reference to X -- including the - // setSlot's own right-hand side -- read our uninitialized - // slot instead of the import. - let existing = for_scope.getBinding(args[1].value); - if (!(existing && existing.type === "module")) - for_scope.addBinding(new ModuleSlotBinding(args[0], args[1], args[1].value)); - } - } - } - - visitBlock(n, initial_bindings) { - let this_scope = new Scope(new Location(n, this.func_stack.top)); - if (this.root_scope === null) this.root_scope = this_scope; - - if (initial_bindings) for (let binding of initial_bindings) this_scope.addBinding(binding); - - // we have to gather decls before visiting our children - // so that if they refer to ids in this scope, we can - // create the proper Reference objects - this.createBindingsForScope(n, this_scope); - - this.doWithScope(this_scope, () => { - this.doWithBlock(n, () => { - super.visitBlock(n); - }); - }); - - Object.defineProperty(n, "scope", { value: this_scope }); - return n; - } - - visitFunction(n) { - //if (n.id) - // debug.log(`function ${n.id?.name} has idx of ${allFunctions.length}`); - - allFunctions.push(n); - //param_bindings = (new Binding(p.name, 'arg', false) for p in n.params) - this.doWithFunc(n, () => { - n.body = this.visitBlock(n.body); //, param_bindings - }); - return n; - } - - visitCatchClause(n) { - // visit our body with a new local binding for the catch parameter - n.body = this.visitBlock(n.body, [new LocalBinding(n.param.name, false)]); - return n; - } - - find_binding_in_scope(ident) { - let name = ident.name; - let s = this.current_scope; - while (s) { - if (s.hasBinding(name)) return new Reference(s.getBinding(name)); - s = s.parentScope; - } - - if (hasOwnProperty.call(runtime_globals, name)) - return new Reference(new GlobalBinding(name)); - - if (this.options.warn_on_undeclared) { - reportWarning(`undeclared identifier: ${ident.name}`, this.filename, ident.loc); - let binding = global_bindings.get(ident.name); - if (!binding) { - binding = new GlobalBinding(ident.name, false); - global_bindings.set(ident.name, binding); - } - return new Reference(binding); - } else { - reportError( - ReferenceError, - `undeclared identifier '${ident.name}'`, - this.filename, - ident.loc - ); - } - return null; - } - - visitIdentifier(n) { - this.current_scope.addReference(this.find_binding_in_scope(n)); - return n; - } - - visitObjectExpression(n) { - for (let property of n.properties) { - if (property.computed) property.key = this.visit(property.key); - property.value = this.visit(property.value); - } - return n; - } - - visitCallExpression(n) { - // if it's one of our get/set Slot/Local/Global intrinsics, bail - if (is_getset_intrinsic(n)) return n; - - // otherwise we need to visit the args - if (is_intrinsic(n)) { - n.arguments = this.visit(n.arguments); - return n; - } - return super.visitCallExpression(n); - } - - visitLabeledStatement(n) { - // we need to override this method so we can skip the identifier being used as the label - n.body = this.visit(n.body); - return n; - } -} - -function placeEnvironments(root_scope) { - let env_id = 0; - - // A map : function -> [environment] - let func_to_envs = new Map(); - - function get_func_envs(f) { - let func_idx = allFunctions.indexOf(f); - let func_envs = func_to_envs.get(func_idx); - if (!func_envs) { - func_envs = []; - func_to_envs.set(func_idx, func_envs); - } - return func_envs; - } - - function add_func_env(func_envs, env) { - if (func_envs[env.level]) { - if (func_envs[env.level] !== env) - throw new Error("multiple paths to an environment? shouldn't be possible."); - } else { - func_envs[env.level] = env; - } - } - - function dump_func_envs() { - func_to_envs.forEach((v, k) => { - debug.log(`function ${allFunctions[k].id.name} (${k}) requires these environments:`); - if (!v || v.length === 0) { - debug.log(" none!"); - } else { - for (var e of v) { - if (e) { - debug.log(` env: ${e.name}`); - } - } - } - }); - } - - // - // given an array of arrays of the form: - // - // [ , , e2 , ] - // [ e0 , e1 , , ] - // - // returns - // - // [ e0 , e1 , e2 , ] - // - // used for merging the func_env arrays returned from children - // - function flatten_func_envs(fe_arr) { - let rv = []; - for (let fe of fe_arr) { - if (fe) { - for (let idx = 0, ei = fe.length; idx < ei; idx++) { - let e = fe[idx]; - if (e) rv[idx] = e; // should probably check if !rv[idx] or rv[idx] === e - } - } - } - return rv; - } - - function dump_scopes(s, level) { - //debug.log(s.debugString()); - s.children.forEach((c) => { - //debug.indent(); - dump_scopes(c, level + 1); - //debug.unindent(); - }); - } - - function walk_scope1(s, level) { - // - // Collect external references to bindings defined in this scope. - // - // referent reference - // s <-------------> binding <---------------> referencingScope - // - //debug.log(`dealing with scope from line ${s.location.block.loc.start.line}, environment will be ${env_id}`); - let env = new Environment(env_id, level); - env_id++; - - // walk over this scope's referents. if any of this scope's - // bindings are referred to from outside the function, we need - // an environment - s.referents.forEach((reflist) => { - reflist.forEach((ref) => { - let referencingScope = ref.referencingScope; - //debug.log(`referent name is ${ref.binding.name}, s.func = ${s.location.func.id.name}/${s.location.func.loc.start.line}, referencing scope = ${referencingScope.location.func.id.name}/${referencingScope.location.func.loc.start.line}`); - if (referencingScope.differentFunction(s)) { - // the scopes are in different functions - //debug.log(`reference to '${ref.binding.name}' from outside declaring function (in function ${referencingScope.location.func.id.name})!`); - - // and add a slot for the referent - env.addSlot(ref.binding.name); - - // also, mark the referencing scope's function as needing this environment - let func_envs = get_func_envs(referencingScope.location.func); - add_func_env(func_envs, env); - } - }); - }); - - if (env.slotCount() > 0) { - //debug.log(`creating environment '${env.name}' for function ${s.location.func.id.name}`); - s.env = env; - } - - // recurse into our child scopes. - let child_func_envs = s.children.map((c) => { - //debug.indent(); - let ce = walk_scope1(c, level + 1); - //debug.unindent(); - return ce; - }); - - let child_env_reqs = flatten_func_envs(child_func_envs); - - // we're back in the scope passed to this function, - // having visited all parents and all children. we - // should now know exactly which parent scopes have - // environments, and should be able to calculate the - // path to any bindings we reference. - - //debug.log("before removing our environment, function ${s.location.func.id.name} has the following required (from children) environments: ${env for env in child_env_reqs}`); - - if (s.env) { - let idx = child_env_reqs.indexOf(s.env); - if (idx !== -1) { - //debug.log(`removing env ${s.env.name} from list of required environments`); - child_env_reqs.splice(idx, 1); - } - } - - //debug.log(`function ${s.location.func.id.name} has the following required (from children) environments: ${env for env in child_env_reqs}`); - - s.nestedEnvironments = child_env_reqs; - - if (s.isFunctionBodyScope()) { - let func = s.location.func; - let func_idx = allFunctions.indexOf(func); - //debug.log(" scope is function body scope for //{func_idx} //{func.id?.name}///{func.loc?.start.line}"); - - let func_envs = get_func_envs(func); - - // add the nested environments required by our descendents (that have not been added somewhere in this function) as though they are required by us - s.nestedEnvironments.forEach((nested_env) => { - if (!nested_env) return; - //debug.log "adding //{nested_env}" - add_func_env(func_envs, nested_env); - }); - - //debug.log("after adding nested environments, func_envs for function is //{fenv for fenv in func_envs}") - - return func_envs; - } - - return s.nestedEnvironments; - } - - // for every environment, calculate the parent they must have by all the paths we've computed in func_to_envs - function collapse_paths() { - let parent_envs = new Map(); - - func_to_envs.forEach((func_envs, func) => { - if (func_envs.length === 0) return; - - func_envs = func_envs.filter((a_env) => a_env); - - for (let idx = func_envs.length - 1; idx >= 1; idx--) { - let current_e = func_envs[idx]; - let prospective_parent = func_envs[idx - 1]; - if ( - !parent_envs.has(current_e) || - parent_envs.get(current_e).level < prospective_parent.level - ) { - parent_envs.set(current_e, prospective_parent); - } - } - }); - - parent_envs.forEach((e, p_e) => e.addChild(p_e)); - - // now insert dependencies for parent envs between environments that require them - func_to_envs.forEach((func_envs, func) => { - if (func_envs.length < 2) return; - - let collapsed_func_envs = func_envs.filter((a_env) => a_env); - - for (let idx = collapsed_func_envs.length - 1; idx >= 1; idx--) { - let current_e = collapsed_func_envs[idx]; - let prior_e = collapsed_func_envs[idx - 1]; - if (current_e.parentEnv !== prior_e) { - // we need to walk current_e's parent chain until we reach prior_e, adding the environments to func_envs - let e = current_e.parentEnv; - while (e !== prior_e) { - add_func_env(func_envs, e); - e = e.parentEnv; - } - } - } - }); - } - - function walk_scope2(s, level) { - //debug.log(`walk_scope2 for scope ${s.debugString()}`); - - if (s.env) { - if (s.env.parentEnv && s.env.parentEnv.slotCount() > 0) { - //debug.log "outputting parent environment assignment. parentEnv.name = //{s.env.parentEnv.name}, parentEnv.slotCount = //{s.env.parentEnv.slotCount()}" - s.location.block.body.unshift( - b.expressionStatement( - setSlotIntrinsic( - s.env.name, - s.env.getSlot(s.env.parentEnv.name), - b.identifier(s.env.parentEnv.name) - ) - ) - ); - } - s.location.block.body.unshift( - b.letDeclaration( - b.identifier(s.env.name), - intrinsic(makeClosureEnv_id, [b.literal(s.env.slot_map.size)]) - ) - ); - } else { - //debug.log "scope from line //{s.location.block.loc?.start.line} doesn't have environment" - } - - if (s.isFunctionBodyScope()) { - let func = s.location.func; - let func_idx = allFunctions.indexOf(func); - //debug.log(" ******* scope is function body scope for //{func_idx} //{func.id?.name} //{func.loc?.start.line}"); - let func_envs = get_func_envs(s.location.func); - - let env_assignments = []; - - let env_name; - - if (func_envs.length === 0) { - //debug.log "unused environment, func_envs.length = //{func_envs?.length}" - env_name = "%env_unused"; - } else { - // func_envs.length >= 1 - func_envs = func_envs.filter((a_env) => a_env); - - let last_idx = func_envs.length - 1; - - env_name = func_envs[last_idx].name; - - last_idx -= 1; - - while (last_idx >= 0) { - //debug.log "adding const //{func_envs[last_idx].name} = slotIntrinsic(//{func_envs[last_idx+1].name}, //{func_envs[last_idx+1].name}.getSlot(//{func_envs[last_idx].name}));" - //debug.log " const //{func_envs[last_idx].name} = slotIntrinsic(//{func_envs[last_idx+1].name}, //{func_envs[last_idx+1].getSlot(func_envs[last_idx].name)});" - let env_decl = b.constDeclaration( - b.identifier(func_envs[last_idx].name), - slotIntrinsic( - func_envs[last_idx + 1].name, - func_envs[last_idx + 1].getSlot(func_envs[last_idx].name) - ) - ); - env_decl.loc = func.body.loc; - env_assignments.push(env_decl); - last_idx -= 1; - } - } - - // add the parameter we need - func.params.unshift(b.identifier(env_name, func.loc)); - - // and add the assignments of all the environments this function needs - if (env_assignments.length > 0) { - func.body.body = env_assignments.concat(func.body.body); - } - } - s.children.forEach((c) => walk_scope2(c, level + 1)); - } - - walk_scope1(root_scope, 0); - collapse_paths(); - //dump_scopes(root_scope, 0); - walk_scope2(root_scope, 0); - //dump_func_envs(); -} - -function is_undefined_literal(e) { - if (e.type === b.Literal && e.value === undefined) return true; - return e.type === b.UnaryExpression && e.operator === "void" && e.argument.value === 0; -} - -class ValidateEnvironments extends TreeVisitor { - constructor(options, filename) { - super(); - this.filename = filename; - this.options = options; - } - - visitCallExpression(n) { - n = super.visitCallExpression(n); - // make sure that the environment we assign to a - // closure is the same as the first arg to the function - if (is_intrinsic(n, makeClosure_id.name) || is_intrinsic(n, makeAnonClosure_id.name)) { - //debug.log escodegen.generate n.arguments[0] - //debug.log is_undefined_literal(n.arguments[0]) - if (!is_undefined_literal(n.arguments[0])) { - let closure_env = n.arguments[0].name; - let closure_func = n.arguments[is_intrinsic(n, makeClosure_id.name) ? 2 : 1]; - let func_env = closure_func.params[0].name; - if (closure_env !== func_env) { - throw new Error( - `closure created using environment ${closure_env}, while function takes ${func_env}` - ); - } - } - } else if (is_intrinsic(n, setSlot_id.name)) { - let env_name = n.arguments[0].name; - let env_id = env_name.substring("%env_".length); - let slot = n.arguments[1].value; - } else if (is_intrinsic(n, slot_id.name)) { - let env_name = n.arguments[0].name; - let env_id = env_name.substring("%env_".length); - let slot = n.arguments[1].value; - } - return n; - } -} - -export class NewClosureConvert { - constructor(options, filename, allModules) { - this.options = options; - this.filename = filename; - this.allModules = allModules; - } - - visit(tree) { - let flattenDecls = new FlattenDeclarations(this.options, this.filename, this.allModules); - let collectScopes = new CollectScopeNestingInfo( - this.options, - this.filename, - this.allModules - ); - let substituteVariables = new SubstituteVariables( - this.options, - this.filename, - this.allModules - ); - - tree = flattenDecls.visit(tree); - - tree = collectScopes.visit(tree); - - //debug.log escodegen.generate tree - placeEnvironments(collectScopes.root_scope); - - tree = substituteVariables.visit(tree); - /* - let validator = new ValidateEnvironments(this.options, this.filename); - tree = validator.visit(tree); -*/ - - allFunctions = []; - global_bindings = new Map(); - - return tree; - } -} diff --git a/lib/passes/replace-unary-void.js b/lib/passes/replace-unary-void.js deleted file mode 100644 index 85364b0a..00000000 --- a/lib/passes/replace-unary-void.js +++ /dev/null @@ -1,15 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -import { TreeVisitor } from "../node-visitor"; -import * as b from "../ast-builder"; -import { builtinUndefined_id } from "../common-ids"; -import { create_intrinsic } from "../echo-util"; - -export class ReplaceUnaryVoid extends TreeVisitor { - visitUnaryExpression(n) { - if (n.operator === "void" && n.argument.type === b.Literal && n.argument.value === 0) - return create_intrinsic(builtinUndefined_id, []); - return n; - } -} diff --git a/lib/passes/substitute-variables.js b/lib/passes/substitute-variables.js deleted file mode 100644 index 3e36a9f3..00000000 --- a/lib/passes/substitute-variables.js +++ /dev/null @@ -1,468 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// 1) allocates the environment at the start of the n -// 2) adds mappings for all .closed variables -import { TransformPass } from "../node-visitor"; -import { Stack } from "../stack-es6"; - -import { intrinsic, is_intrinsic, reject, shallow_copy_object } from "../echo-util"; - -import * as b from "../ast-builder"; - -import { - invokeClosure_id, - makeClosure_id, - makeAnonClosure_id, - makeClosureEnv_id, - setSlot_id, - slot_id, -} from "../common-ids"; - -import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; - -let hasOwnProperty = Object.prototype.hasOwnProperty; - -export class SubstituteVariables extends TransformPass { - constructor(options) { - super(options); - this.function_stack = new Stack(); - this.mappings = new Stack(); - } - - currentMapping() { - return this.mappings.depth > 0 ? this.mappings.top : Object.create(null); - } - - visitIdentifier(n) { - if (hasOwnProperty.call(this.currentMapping(), n.name)) - return this.currentMapping()[n.name]; - return n; - } - - visitFor(n) { - // for loops complicate things. - // if any of the variables declared in n.init are closed over - // we promote all of them outside of n.init. - - this.skipExpressionStatement = true; - let init = this.visit(n.init); - this.skipExpressionStatement = false; - n.test = this.visit(n.test); - n.update = this.visit(n.update); - n.body = this.visit(n.body); - if (Array.isArray(init)) { - n.init = null; - return b.blockStatement(init.concat([n])); - } - n.init = init; - return n; - } - - visitForIn(n) { - // for-in loops complicate things. - - let left = this.visit(n.left); - n.right = this.visit(n.right); - n.body = this.visit(n.body); - if (Array.isArray(left)) { - console.log("whu?"); - n.left = b.identifier(left[0].declarations[0].id.name); - return b.blockStatement(left.concat([n])); - } - - n.left = left; - return n; - } - - visitVariableDeclaration(n) { - // here we do some magic depending on whether or not - // variables are closed over (i.e. pushed into the - // environment). - // - // 1. for variables that are closed over that aren't - // initialized (that is, they're implicitly - // 'undefined'), we just remove their declaration - // entirely. it's already been converted to a slot - // everywhere else, and env slots are explicitly - // initialized to undefined by the runtime. - // - // 2. for variables that are closed over that *are* - // initialized, we splice them into the list and - // split the VariableDeclaration node into two, so - // if 'y' is closed over in the following input: - // - // let x = 2, y = x * 2, z = 10; - // - // we'll end up with this in the output: - // - // let x = 2; - // %slot(%env, 1, 'y') = x * 2; - // let z = 10; - // - let decls = n.declarations; - - let rv = []; - - let new_declarations = []; - - // we loop until we find a variable that's closed over *and* has an initializer. - for (let decl of decls) { - decl.init = this.visit(decl.init); - - let closed_over = hasOwnProperty.call(this.currentMapping(), decl.id.name); - if (closed_over) { - // for variables that are closed over but undefined, we skip them (thereby removing them from the list of decls) - - if (decl.init) { - // FIXME: we should also check for an explicit 'undefined' here - - // push the current set of new_declarations if there are any - if (new_declarations.length > 0) - rv.push(b.variableDeclaration(n.kind, new_declarations)); - - // splice in this assignment - rv.push( - b.expressionStatement( - b.assignmentExpression( - this.currentMapping()[decl.id.name], - "=", - decl.init - ) - ) - ); - - // then re-init the new_declarations array - new_declarations = []; - } - } else { - // for variables that aren't closed over, we just add them to the currect decl list. - new_declarations.push(decl); - } - } - - // push the last set of new_declarations if there were any - if (new_declarations.length > 0) { - rv.push(b.variableDeclaration(n.kind, new_declarations)); - } - - if (rv.length === 0) { - rv = b.emptyStatement(); - } - return rv; - } - - visitProperty(n) { - if (n.computed) n.key = this.visit(n.key); - n.value = this.visit(n.value); - return n; - } - - visitBlock(n) { - if (!n.ejs_env) return super.visitBlock(n); - - let this_env_id = b.identifier(`%env_${n.ejs_env.id}`); - let parent_env_name; - if (n.ejs_env.parent) parent_env_name = `%env_${n.ejs_env.parent.id}`; - - let env_prepends = []; - let new_mapping = shallow_copy_object(this.currentMapping()); - - if (n.ejs_env.closed.empty() && !n.ejs_env.nested_requires_env) { - env_prepends.push(b.letDeclaration(this_env_id, b.nullLit())); - } else { - // insert environment creation (at the start of the block) - env_prepends.push( - b.letDeclaration( - this_env_id, - intrinsic(makeClosureEnv_id, [ - b.literal(n.ejs_env.closed.size() + (n.ejs_env.parent ? 1 : 0)), - ]) - ) - ); - - n.ejs_env.slot_mapping = Object.create(null); - var i = 0; - if (n.ejs_env.parent) { - n.ejs_env.slot_mapping[parent_env_name] = i; - i += 1; - } - n.ejs_env.closed.map((el) => { - n.ejs_env.slot_mapping[el] = i; - i += 1; - }); - - if (n.ejs_env.parent) { - let parent_env_slot = n.ejs_env.slot_mapping[parent_env_name]; - env_prepends.push( - b.expressionStatement( - intrinsic(setSlot_id, [ - this_env_id, - b.literal(parent_env_slot), - b.literal(parent_env_name), - b.identifier(parent_env_name), - ]) - ) - ); - } - // XXX here's where function handling pushes closed over parameters. i'm guessing we need special logic for incoming environment slots for loop variables? - - new_mapping["%slot_mapping"] = n.ejs_env.slot_mapping; - - var flatten_memberexp = (exp, mapping) => { - if (exp.type !== CallExpression) { - return [b.literal(mapping[exp.name])]; - } else { - return flatten_memberexp(exp.arguments[0], mapping).concat([exp.arguments[1]]); - } - }; - - let prepend_environment = (exps) => { - let obj = this_env_id; - for (let prop of exps) obj = intrinsic(slot_id, [obj, prop]); - return obj; - }; - - // if there are existing mappings prepend "%env." (a MemberExpression) to them - for (let mapped in new_mapping) { - let val = new_mapping[mapped]; - if (mapped !== "%slot_mapping") - new_mapping[mapped] = prepend_environment( - flatten_memberexp(val, n.ejs_env.slot_mapping) - ); - } - - // and add mappings for all variables in .closed from "x" to "%env.x" - new_mapping["%env"] = this_env_id; - n.ejs_env.closed.keys().forEach((sym) => { - new_mapping[sym] = intrinsic(slot_id, [ - this_env_id, - b.literal(n.ejs_env.slot_mapping[sym]), - b.literal(sym), - ]); - }); - } - - // remove all mappings for variables declared in this function - if (n.ejs_decls) { - new_mapping = reject( - new_mapping, - (sym) => n.ejs_decls.has(sym) && !n.ejs_env.closed.has(sym) - ); - } - - this.mappings.push(new_mapping); - super.visitBlock(n); - if (env_prepends.length > 0) n.body = env_prepends.concat(n.body); - this.mappings.pop(); - return n; - } - - visitFunctionBody(n) { - n.scratch_size = 0; - - // we use this instead of calling super in visitFunction because we don't want to visit parameters - // during this pass, or they'll be substituted with an %env. - - this.function_stack.push(n); - n.body = this.visit(n.body); - this.function_stack.pop(); - - return n; - } - - visitFunction(n) { - try { - // XXX this should be a let, but ejs currently pukes if we close over it. - var this_env_id = b.identifier(`%env_${n.ejs_env.id}`); - let parent_env_name; - - if (n.ejs_env.parent) parent_env_name = `%env_${n.ejs_env.parent.id}`; - - let env_prepends = []; - // XXX this should be a let, but ejs currently pukes if we close over it. - var new_mapping = shallow_copy_object(this.currentMapping()); - if (n.ejs_env.closed.empty() && !n.ejs_env.nested_requires_env) { - env_prepends.push(b.letDeclaration(this_env_id, b.nullLit())); - } else { - // insert environment creation (at the start of the function body) - env_prepends.push( - b.letDeclaration( - this_env_id, - intrinsic(makeClosureEnv_id, [ - b.literal(n.ejs_env.closed.size() + (n.ejs_env.parent ? 1 : 0)), - ]) - ) - ); - - n.ejs_env.slot_mapping = Object.create(null); - // XXX this should be a let, but ejs currently pukes if we close over it. - var i = 0; - if (n.ejs_env.parent) { - n.ejs_env.slot_mapping[parent_env_name] = i; - i++; - } - n.ejs_env.closed.map((el) => { - n.ejs_env.slot_mapping[el] = i; - i++; - }); - - if (n.ejs_env.parent) { - let parent_env_slot = n.ejs_env.slot_mapping[parent_env_name]; - env_prepends.push( - b.expressionStatement( - intrinsic(setSlot_id, [ - this_env_id, - b.literal(parent_env_slot), - b.literal(parent_env_name), - b.identifier(parent_env_name), - ]) - ) - ); - } - - // we need to push assignments of any closed over parameters into the environment at this point - for (let param of n.params) { - if (n.ejs_env.closed.has(param.name)) - env_prepends.push( - b.expressionStatement( - intrinsic(setSlot_id, [ - this_env_id, - b.literal(n.ejs_env.slot_mapping[param.name]), - b.literal(param.name), - b.identifier(param.name), - ]) - ) - ); - } - - new_mapping["%slot_mapping"] = n.ejs_env.slot_mapping; - - var flatten_memberexp = (exp, mapping) => { - if (exp.type !== CallExpression) { - return [b.literal(mapping[exp.name])]; - } else { - return flatten_memberexp(exp.arguments[0], mapping).concat([ - exp.arguments[1], - ]); - } - }; - - let prepend_environment = (exps) => { - let obj = this_env_id; - for (let prop of exps) obj = intrinsic(slot_id, [obj, prop]); - return obj; - }; - - // if there are existing mappings prepend "%env." (a MemberExpression) to them - for (let mapped in new_mapping) { - let val = new_mapping[mapped]; - if (mapped !== "%slot_mapping") - new_mapping[mapped] = prepend_environment( - flatten_memberexp(val, n.ejs_env.slot_mapping) - ); - } - - // and add mappings for all variables in .closed from "x" to "%env.x" - new_mapping["%env"] = this_env_id; - n.ejs_env.closed.keys().forEach((sym) => { - new_mapping[sym] = intrinsic(slot_id, [ - this_env_id, - b.literal(n.ejs_env.slot_mapping[sym]), - b.literal(sym), - ]); - }); - } - // remove all mappings for variables declared in this function - if (n.ejs_decls) { - new_mapping = reject( - new_mapping, - (sym) => n.ejs_decls.has(sym) && !n.ejs_env.closed.has(sym) - ); - } - - this.mappings.push(new_mapping); - this.visitFunctionBody(n); - if (env_prepends.length > 0) n.body.body = env_prepends.concat(n.body.body); - this.mappings.pop(); - - // convert function expressions to an explicit closure creation, so: - // - // function X () { ...body... } - // - // replace inline with: - // - // makeClosure(%current_env, "X", function X () { ...body... }) - - if (!n.toplevel) { - if (n.type === FunctionDeclaration) { - throw new Error("there should be no FunctionDeclarations at this point"); - } else { - // n.type is FunctionExpression - let intrinsic_args = []; - intrinsic_args.push( - n.ejs_env.parent ? b.identifier(parent_env_name) : b.nullLit() - ); - - let intrinsic_id; - if (n.id) { - intrinsic_id = makeClosure_id; - if (n.id.type === Identifier) { - intrinsic_args.push(b.literal(n.id.name)); - } else { - intrinsic_args.push(b.literal(escodegen.generate(n.id))); - } - } else { - intrinsic_id = makeAnonClosure_id; - } - - intrinsic_args.push(n); - - return intrinsic(intrinsic_id, intrinsic_args); - } - } - return n; - } catch (e) { - console.warn(`exception: ${e}`); - //console.warn "compiling the following code:" - //console.warn escodegen.generate n - throw e; - } - } - - visitCallExpression(n) { - n = super.visitCallExpression(n); - - // replace calls of the form: - // X (arg1, arg2, ...) - // - // with - // invokeClosure(X, %this, %argCount, arg1, arg2, ...); - - if (is_intrinsic(n)) return n; - this.function_stack.top.scratch_size = Math.max( - this.function_stack.top.scratch_size, - n.arguments.length - ); - return intrinsic(invokeClosure_id, [n.callee].concat(n.arguments)); - } - - visitNewExpression(n) { - n = super.visitNewExpression(n); - - // replace calls of the form: - // new X (arg1, arg2, ...) - // - // with - // invokeClosure(X, %this, %argCount, arg1, arg2, ...); - - this.function_stack.top.scratch_size = Math.max( - this.function_stack.top.scratch_size, - n.arguments.length - ); - - let rv = intrinsic(invokeClosure_id, [n.callee].concat(n.arguments)); - rv.type = NewExpression; - return rv; - } -} From 6c929b2aade806931aee691f10ee11058e6b18b1 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 11:15:47 -0700 Subject: [PATCH 048/146] eir: mop-up after the deletion; computed accessor keys lower natively MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Mop-up: the dead sibling-direct-call machinery (mod_ctx.siblings was always an empty Map since candidate mode died) is gone from lower.js — direct calls remain for self-recursion, and cross-function devirtualization returns as an optimizer concern; closure-conversion.js is renamed desugar.js (it stopped converting closures when new-cc died); the --ir no-op flag is dropped; stale legacy-era comments in scopes/integrate updated (including the bug-#21 legacy-safe-shape constraint note, which lifted when stage1 became EIR-built). Computed accessor keys ({ get [k]() {} }) — which no pipeline ever compiled — now lower: each computed accessor defines separately in source order via a new define_accessor_computed op, calling a new _ejs_object_define_accessor_property_desc runtime entry that passes the caller's descriptor flags through unforced, so partial get-only / set-only descriptors merge in DefineOwnProperty exactly as the spec evaluates them. object18.js un-xfailed after a decade. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- ejs-es6.js | 5 --- lib/compiler.js | 2 +- lib/{closure-conversion.js => desugar.js} | 0 lib/eir/emit.js | 22 +++++++++ lib/eir/integrate.js | 9 ++-- lib/eir/intrinsics.js | 2 +- lib/eir/lower.js | 55 ++++++++++------------- lib/eir/ops.js | 4 ++ lib/eir/scopes.js | 15 ++----- lib/eir/tests.js | 26 ++++++----- lib/runtime.js | 8 ++++ runtime/ejs-object.c | 12 +++++ runtime/ejs-object.h | 1 + test/object18.js | 1 - 14 files changed, 96 insertions(+), 66 deletions(-) rename lib/{closure-conversion.js => desugar.js} (100%) diff --git a/ejs-es6.js b/ejs-es6.js index 1bb0c27c..4b12f311 100755 --- a/ejs-es6.js +++ b/ejs-es6.js @@ -184,11 +184,6 @@ let args = { flag: "quiet", help: "don't output anything during compilation except errors.", }, - "--ir": { - handler: () => {}, - handlerArgc: 0, - help: "no-op; EIR (SSA) is the only pipeline. accepted for one release.", - }, "-I": { handler: add_import_variable, handlerArgc: 1, diff --git a/lib/compiler.js b/lib/compiler.js index a6f76104..7713e2d6 100644 --- a/lib/compiler.js +++ b/lib/compiler.js @@ -5,7 +5,7 @@ import * as llvm from "@llvm"; -import { preEIRConvert as pre_eir_convert } from "./closure-conversion"; +import { preEIRConvert as pre_eir_convert } from "./desugar"; import * as types from "./types"; import * as consts from "./consts"; import * as runtime from "./runtime"; diff --git a/lib/closure-conversion.js b/lib/desugar.js similarity index 100% rename from lib/closure-conversion.js rename to lib/desugar.js diff --git a/lib/eir/emit.js b/lib/eir/emit.js index 02b5836d..4bf1cfcc 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.js @@ -679,6 +679,28 @@ export class EIREmitter { } return arr; } + case "define_accessor_computed": { + // a partial accessor descriptor: only the getter or only + // the setter is present; the runtime merges into any + // existing accessor property. enumerable+configurable, + // like the atom-keyed case. + let isGet = inst.imms.kind === "get"; + let flags = 0x33 | (isGet ? 0x100 : 0x200); + let accessor = this.val(inst.operands[2]); + let undef = this.v.loadUndefinedEjsValue(); + return this.emitCallLike( + inst, + rt.object_define_accessor_prop_desc, + [ + this.val(inst.operands[0]), + this.val(inst.operands[1]), + isGet ? accessor : undef, + isGet ? undef : accessor, + consts.int32(flags), + ], + "define_accessor_computed" + ); + } case "define_accessor": { // flags 0x19 = enumerable | configurable, matching the // legacy visitObjectExpression diff --git a/lib/eir/integrate.js b/lib/eir/integrate.js index b132ce8e..90931a83 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.js @@ -340,12 +340,13 @@ export function collectEIRToplevel(tree, filename, module_infos, this_module_inf let analysis = new ScopeAnalysis(); let info = analysis.analyzeToplevel(toplevel, toplevel.id.name, moduleSlotNames); - // no direct sibling calls in toplevel mode: a slot-backed module - // function may capture the toplevel environment, which a caller's - // envParam wouldn't carry. calls go slot-load + invoke_closure. + // module functions call each other through their slots + // (slot-load + invoke_closure): a slot-backed function may capture + // the toplevel environment, which a direct caller's envParam + // wouldn't carry. direct calls stay a devirtualization + // opportunity for the optimizer, which can prove capture shapes. let mod_ctx = { refs: refs, - siblings: new Map(), this_module_info: this_module_info, module_infos: module_infos, }; diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js index d9ba4bae..01d1ce20 100644 --- a/lib/eir/intrinsics.js +++ b/lib/eir/intrinsics.js @@ -3,7 +3,7 @@ */ // The %-intrinsic calls EIR knows how to lower, keyed by callee name. -// Pre-EIR desugar passes (see preEIRConvert in closure-conversion.js) +// Pre-EIR desugar passes (see preEIRConvert in desugar.js) // rewrite constructs lowering has no native form for into calls of these // intrinsics, which both pipelines then understand: the legacy visitor // through its ejs_intrinsics table, EIR through this one. diff --git a/lib/eir/lower.js b/lib/eir/lower.js index ab2a52ca..a7de6ff0 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -27,9 +27,6 @@ // edges), try/finally (finalizer duplication), per-iteration loop // environments, and the %-intrinsic calls listed in intrinsics.js // (produced by the pre-EIR desugar passes, e.g. %arrayFromSpread). -// -// Not yet: `this` in a candidate whose root is itself an arrow (needs -// the module toplevel's this). import * as b from "../ast-builder"; import { FunctionBuilder } from "./builder"; @@ -81,7 +78,7 @@ class LowerFunction { // module-scope interop: module-slot references (imports and this // module's exports: name -> {module, slot, constval?, writable}) // and sibling top-level EIR functions callable directly - this.mod_ctx = mod_ctx || { refs: new Map(), siblings: new Map() }; + this.mod_ctx = mod_ctx || { refs: new Map() }; let paramNames = info.params.map((p) => p.uid); this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); @@ -450,16 +447,32 @@ class LowerFunction { } // an object literal containing get/set accessors: empty object, then - // per-property defines in source order. a get/set PAIR for one name - // becomes a single define_accessor (name-keyed — keying by the key - // AST node is how the class desugar lost getters, bug #14). + // per-property defines in source order. a non-computed get/set PAIR + // for one name becomes a single define_accessor (name-keyed — keying + // by the key AST node is how the class desugar lost getters, bug + // #14). computed-key accessors each define separately in source + // order (their keys are distinct evaluations); the runtime merges + // the partial descriptors. objectWithAccessors(n) { let obj = this.b.emit("make_object", [], { keys: [] }); let done = new Set(); for (let i = 0; i < n.properties.length; i++) { let p = n.properties[i]; - if (p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal)) - throw LowerNotSupported("computed key in accessor object literal", n.loc); + if (p.computed) { + let key = this.expr(p.key); + if (p.kind && p.kind !== "init") { + let accessor = this.expr(p.value); + this.b.emit("define_accessor_computed", [obj, key, accessor], { + kind: p.kind, + }); + } else { + let v = this.expr(p.value); + this.b.emit("set_prop", [obj, key, v], {}); + } + continue; + } + if (p.key.type !== b.Identifier && p.key.type !== b.Literal) + throw LowerNotSupported(`accessor object literal key ${p.key.type}`, n.loc); let name = p.key.type === b.Identifier ? p.key.name : String(p.key.value); if (p.kind && p.kind !== "init") { if (done.has(name)) continue; // the pair lowered together @@ -529,11 +542,6 @@ class LowerFunction { slot: ref.slot, }); } - if (this.mod_ctx.siblings.has(n.name)) - throw LowerNotSupported( - `module function '${n.name}' used as a value`, - n.loc - ); return this.b.emit("get_global", [], { atom: n.name }); } if (binding.kind === "self") @@ -664,11 +672,6 @@ class LowerFunction { }); return; } - if (this.mod_ctx.siblings.has(idNode.name)) - throw LowerNotSupported( - `assignment to module function '${idNode.name}'`, - idNode.loc - ); this.b.emit("set_global", [value], { atom: idNode.name }); return; } @@ -862,8 +865,8 @@ class LowerFunction { callee = this.b.emit("get_prop", [thisArg, key], {}); } } else { - // direct calls: recursion through the self binding, and calls - // to sibling top-level EIR functions, skip closure dispatch + // direct calls: recursion through the self binding skips + // closure dispatch if (n.callee.type === b.Identifier) { let binding = this.analysis.resolve(n.callee); if (binding && binding.kind === "self" && binding.fnInfo === this.info) { @@ -873,16 +876,6 @@ class LowerFunction { direct: this.info.name, }); } - if ( - (binding === null || binding === undefined) && - this.mod_ctx.siblings.has(n.callee.name) - ) { - let dthis = this.b.constUndefined(); - let dargs = n.arguments.map((a) => this.expr(a)); - return this.b.emit("call", [this.envParam, dthis].concat(dargs), { - direct: this.mod_ctx.siblings.get(n.callee.name), - }); - } } callee = this.expr(n.callee); thisArg = this.b.constUndefined(); diff --git a/lib/eir/ops.js b/lib/eir/ops.js index c9b4c8da..4c9a766a 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.js @@ -128,6 +128,10 @@ export const OPS = { // an accessor property on an object literal: [obj, getter, setter] // (undefined for a missing half); non-computed keys only define_accessor: { arity: 3, effects: E.GC | E.WRITE, imms: ["atom"] }, + // computed-key accessor: operands [obj, key, accessor]; imms.kind is + // "get" or "set" — each accessor defines separately (partial + // descriptors merge in the runtime) + define_accessor_computed: { arity: 3, effects: E.GC | E.WRITE, imms: ["kind"] }, // a fresh RegExp per evaluation (ES6 semantics, matching the legacy // visitLiteral); imms.source/imms.flags are strings make_regexp: { arity: 0, effects: E.THROW | E.GC, imms: ["source", "flags"] }, diff --git a/lib/eir/scopes.js b/lib/eir/scopes.js index bcf6b989..b3d7d9d6 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.js @@ -15,8 +15,9 @@ // carry a parent-env pointer in slot 0. // // The walker deliberately covers the same whitelisted AST subset as -// lower.js and throws LowerNotSupported on anything else, so a function -// either lowers completely or falls back to the legacy path as a unit. +// lower.js and throws LowerNotSupported on anything else, early — a +// construct that doesn't lower is a compile error, and it must surface +// before lowering starts mutating the module. import * as b from "../ast-builder"; import { LowerNotSupported, isLowerNotSupported } from "./errors"; @@ -152,10 +153,7 @@ export class ScopeAnalysis { this.moduleSlotNames = null; this.rootInfo = null; // every EIR function name handed out by enterFunction (scope - // qualification alone isn't unique). NOTE: initialized HERE, not - // lazily at first use — the lazy-init + template-literal form of - // this code miscompiled under the legacy pipeline (undistilled; - // see the phase-3 notes). + // qualification alone isn't unique) this.usedFnNames = new Set(); } @@ -970,11 +968,6 @@ export class ScopeAnalysis { return; case b.ObjectExpression: for (let p of n.properties) { - // accessors lower via define_accessor; computed - // accessor keys don't (rare, and the runtime call - // takes an atom) - if (p.kind && p.kind !== "init" && p.computed) - throw LowerNotSupported(`computed object literal ${p.kind}ter`, n.loc); if (p.computed) this.walkExpr(p.key); this.walkExpr(p.value); } diff --git a/lib/eir/tests.js b/lib/eir/tests.js index 16b57ca0..2bef7fca 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.js @@ -430,18 +430,20 @@ test("lower: array literal spread lowers to array_from_spread", () => { assertContains(printFunction(r.fn), "array_from_spread"); }); -test("lower: computed accessor keys raise LowerNotSupported", () => { - // define_accessor takes an atom key; computed accessor keys don't - // lower (object18.js xfails on this end to end) - let threw = false; - try { - lowerFunctionNode( - parseFnPreEIR("function t(k) { return { get [k]() { return 1; } }; }") - ); - } catch (e) { - threw = isLowerNotSupported(e); - } - assert(threw, "expected LowerNotSupported"); +test("lower: computed accessor keys lower via define_accessor_computed", () => { + let r = lowerFunctionNode( + parseFnPreEIR( + "function t(k) { return { get [k]() { return 1; }, set [k](v) { this.v = v; } }; }" + ) + ); + verifyModule(r.module); + let printed = printFunction(r.fn); + let first = printed.indexOf("define_accessor_computed"); + assert(first !== -1, "expected define_accessor_computed"); + assert( + printed.indexOf("define_accessor_computed", first + 1) !== -1, + "expected separate defines for getter and setter" + ); }); test("lower: for-of pattern heads desugar pre-EIR", () => { diff --git a/lib/runtime.js b/lib/runtime.js index 5976b4bb..392e7d3e 100644 --- a/lib/runtime.js +++ b/lib/runtime.js @@ -266,6 +266,14 @@ const runtime_interface = { [ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.Int32] ); }, + object_define_accessor_prop_desc: function () { + return this.abi.createExternalFunction( + this.module, + "_ejs_object_define_accessor_property_desc", + ty.Bool, + [ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.Int32] + ); + }, object_define_value_prop: function () { return this.abi.createExternalFunction( this.module, diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 1426529a..9261010d 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -890,6 +890,18 @@ _ejs_object_define_accessor_property (ejsval obj, ejsval key, ejsval get, ejsval return OP(_obj,DefineOwnProperty)(obj, key, &desc, EJS_FALSE); } +// like _ejs_object_define_accessor_property, but the caller's flags say +// which of get/set are present — a partial descriptor merges into an +// existing accessor property (`{ get [k]() {}, set [k](v) {} }` defines +// the getter and setter in two separate evaluations) +EJSBool +_ejs_object_define_accessor_property_desc (ejsval obj, ejsval key, ejsval get, ejsval set, uint32_t flags) +{ + EJSObject *_obj = EJSVAL_TO_OBJECT(obj); + EJSPropertyDesc desc = { .getter = get, .setter = set, .flags = flags }; + return OP(_obj,DefineOwnProperty)(obj, key, &desc, EJS_FALSE); +} + ejsval _ejs_object_setprop_utf8 (ejsval val, const char *key, ejsval value) diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index db0e8a2e..fa27c3a8 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -249,6 +249,7 @@ void _ejs_propertymap_foreach_property (EJSPropertyMap *map, EJSPropertyDescFunc EJSBool _ejs_object_define_value_property (ejsval obj, ejsval key, ejsval value, uint32_t flags); EJSBool _ejs_object_define_accessor_property (ejsval obj, ejsval key, ejsval get, ejsval set, uint32_t flags); +EJSBool _ejs_object_define_accessor_property_desc (ejsval obj, ejsval key, ejsval get, ejsval set, uint32_t flags); ejsval _ejs_object_setprop (ejsval obj, ejsval key, ejsval value); ejsval _ejs_object_getprop (ejsval obj, ejsval key); diff --git a/test/object18.js b/test/object18.js index b46d6132..7a360212 100644 --- a/test/object18.js +++ b/test/object18.js @@ -1,5 +1,4 @@ // generator: babel-node -// xfail: XXX function test() { var x = "y", From 9bca4732b6871b7f249581c3467c2281af4c7b59 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 11:15:48 -0700 Subject: [PATCH 049/146] docs: JS modernization census (34 probes) + plans update MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit test/modernization/ holds a 34-file feature-probe battery (outside the tester's discovery glob — most don't compile yet) with a README classifying the results: 13 parser gaps (optional chaining, nullish coalescing, class fields, async/await, exponentiation, object spread/rest, BigInt, trailing param commas, optional catch binding, logical assignment), 4 stdlib gaps (String.padStart/replaceAll/at, Array.flat/includes/at/findLast, Object.entries/values/fromEntries, globalThis), 4 behavioral divergences (__proto__: literal, /gi replace losing ignoreCase, generator.return(), and one hazard: async object methods parse but silently miscompile), and 17 features that already work. Co-Authored-By: Claude Fable 5 --- docs/plans.md | 23 +++++++- test/modernization/README.md | 54 +++++++++++++++++++ test/modernization/f01-optional-chaining.js | 1 + test/modernization/f02-nullish.js | 1 + test/modernization/f03-class-fields.js | 1 + test/modernization/f04-private-fields.js | 1 + test/modernization/f05-async-await.js | 1 + test/modernization/f06-exponent.js | 1 + test/modernization/f07-object-spread.js | 1 + test/modernization/f08-object-rest.js | 1 + test/modernization/f09-async-gen.js | 1 + test/modernization/f10-for-await.js | 1 + test/modernization/f11-bigint.js | 1 + test/modernization/f12-string-methods.js | 1 + test/modernization/f13-array-methods.js | 1 + test/modernization/f14-object-methods.js | 1 + test/modernization/f15-symbol-iterator.js | 1 + test/modernization/f16-getter-shorthand.js | 1 + test/modernization/f17-computed-methods.js | 1 + test/modernization/f18-tagged-raw.js | 1 + test/modernization/f19-labeled-block.js | 1 + test/modernization/f20-getter-setter-proto.js | 1 + test/modernization/f21-new-target.js | 1 + test/modernization/f22-trailing-comma-fn.js | 1 + test/modernization/f23-catch-no-param.js | 1 + test/modernization/f24-regex-flags.js | 1 + .../f25-destructure-default-fn.js | 1 + test/modernization/f26-generator-return.js | 1 + test/modernization/f27-map-set.js | 1 + test/modernization/f28-promise.js | 1 + test/modernization/f29-proxy.js | 1 + test/modernization/f30-getters-on-class.js | 1 + test/modernization/f31-logical-assign.js | 1 + test/modernization/f32-globalthis.js | 1 + .../f33-array-destructure-swap.js | 1 + .../f34-shorthand-async-method.js | 1 + 36 files changed, 109 insertions(+), 2 deletions(-) create mode 100644 test/modernization/README.md create mode 100644 test/modernization/f01-optional-chaining.js create mode 100644 test/modernization/f02-nullish.js create mode 100644 test/modernization/f03-class-fields.js create mode 100644 test/modernization/f04-private-fields.js create mode 100644 test/modernization/f05-async-await.js create mode 100644 test/modernization/f06-exponent.js create mode 100644 test/modernization/f07-object-spread.js create mode 100644 test/modernization/f08-object-rest.js create mode 100644 test/modernization/f09-async-gen.js create mode 100644 test/modernization/f10-for-await.js create mode 100644 test/modernization/f11-bigint.js create mode 100644 test/modernization/f12-string-methods.js create mode 100644 test/modernization/f13-array-methods.js create mode 100644 test/modernization/f14-object-methods.js create mode 100644 test/modernization/f15-symbol-iterator.js create mode 100644 test/modernization/f16-getter-shorthand.js create mode 100644 test/modernization/f17-computed-methods.js create mode 100644 test/modernization/f18-tagged-raw.js create mode 100644 test/modernization/f19-labeled-block.js create mode 100644 test/modernization/f20-getter-setter-proto.js create mode 100644 test/modernization/f21-new-target.js create mode 100644 test/modernization/f22-trailing-comma-fn.js create mode 100644 test/modernization/f23-catch-no-param.js create mode 100644 test/modernization/f24-regex-flags.js create mode 100644 test/modernization/f25-destructure-default-fn.js create mode 100644 test/modernization/f26-generator-return.js create mode 100644 test/modernization/f27-map-set.js create mode 100644 test/modernization/f28-promise.js create mode 100644 test/modernization/f29-proxy.js create mode 100644 test/modernization/f30-getters-on-class.js create mode 100644 test/modernization/f31-logical-assign.js create mode 100644 test/modernization/f32-globalthis.js create mode 100644 test/modernization/f33-array-destructure-swap.js create mode 100644 test/modernization/f34-shorthand-async-method.js diff --git a/docs/plans.md b/docs/plans.md index a887b9cd..6094fabd 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -87,6 +87,27 @@ preserved** — destructuring returns, options objects, tuple-ish arrays. parser layer (type-stripping or a parser swap). If it happens, TS type annotations are a natural seed for the EIR type lattice above. +## JS Modernization (after the TypeScript port) + +JavaScript hasn't stood still while this project was on hiatus: there +are new language features to catch up on (optional chaining, nullish +coalescing, class fields, async/await, BigInt, ...), and the kangax +conformance suite this repo tests against has been superseded — tc39 +maintains test262, which is far larger. The effort: + +- Inventory the gap: an initial 34-probe census lives in + `test/modernization/` (see its README). Headline: 13 parser gaps + (optional chaining, `??`, class fields, async/await, `**`, object + spread/rest, BigInt, ...), 4 stdlib gaps (padStart/flat/ + Object.entries/globalThis), 4 behavioral bugs (`__proto__:` literal, + `/gi` replace, `generator.return()`, and a hazard: `async m()` + object methods parse but silently miscompile). A test262 subset + probe should follow for exhaustiveness. +- Implement in payoff order; wire probes into CI as they green. + +Sequenced after the TypeScript port — new-feature work is safer with +types underneath it. + ## Modules and linking Static linking remains the regime (no dynamic loading planned). @@ -104,5 +125,3 @@ Static linking remains the regime (no dynamic loading planned). - The stage ladder (`//:test-eir`, `//:test-stage0..3`) IS the EIR matrix now; the `-ir`/`-legacy` target duplicates are gone. - Broader coverage generally, as a prerequisite for the TS port. -- Computed accessor keys (`{ get [k]() {} }`) need an ejsval-key - variant of the define-accessor runtime call to un-xfail object18.js. diff --git a/test/modernization/README.md b/test/modernization/README.md new file mode 100644 index 00000000..c71978b5 --- /dev/null +++ b/test/modernization/README.md @@ -0,0 +1,54 @@ +# JS Modernization census + +Probe files for the modernization effort (see `docs/plans.md`). These +are deliberately OUTSIDE the tester's `*.js` discovery glob — +most don't compile yet. Each file is a single modern-JS feature; run +one with the node-hosted compiler and diff against `node `. + +Census as of 2026-07-10 (post legacy-pipeline deletion): + +## Parser gaps (the esprima fork is the long pole) — 13 + +| probe | feature | +|---|---| +| f01 | optional chaining `?.` | +| f02 | nullish coalescing `??` | +| f03 | class fields (instance + static) | +| f04 | private fields `#x` | +| f05 | `async`/`await` | +| f06 | exponentiation `**` | +| f07 | object spread `{...a}` | +| f08 | object rest `{x, ...rest}` | +| f09 | async generators | +| f10 | `for await` | +| f11 | BigInt literals `10n` | +| f22 | trailing comma in function params | +| f23 | optional catch binding `catch {}` | +| f31 | logical assignment `??=` `\|\|=` `&&=` | + +## Runtime/stdlib gaps — 4 + +| probe | missing | +|---|---| +| f12 | `String.prototype.padStart` / `replaceAll` / `at` | +| f13 | `Array.prototype.flat` / `includes` / `at` / `findLast` | +| f14 | `Object.entries` / `values` / `fromEntries` | +| f32 | `globalThis` | + +## Behavioral divergences (bugs) — 4 + +| probe | divergence | +|---|---| +| f20 | `__proto__:` in an object literal doesn't set the prototype | +| f24 | `"aAa".replace(/a/gi, "x")` → `"xAx"` (ignoreCase lost when combined with global) | +| f26 | `generator.return()` not implemented in the runtime | +| f34 | **HAZARD**: `async m() {}` object method PARSES but silently miscompiles (no parse error, wrong behavior) — should be rejected until async lands | + +## Already working (17) + +Symbol.iterator generators, shorthand props, computed methods, tagged +template `.raw`, labeled blocks, `__proto__`-adjacent getters, +`new.target`, regex `s` flag parse, destructured/defaulted params, +Map/Set, Promise (then-chains), Proxy (get), class getters/static +getters, array-destructuring swap, computed accessor keys +(`{ get [k]() {} }`, as of the same day this census was taken). diff --git a/test/modernization/f01-optional-chaining.js b/test/modernization/f01-optional-chaining.js new file mode 100644 index 00000000..7b094005 --- /dev/null +++ b/test/modernization/f01-optional-chaining.js @@ -0,0 +1 @@ +let o = {a: {b: 1}}; console.log(o?.a?.b, o?.x?.y); diff --git a/test/modernization/f02-nullish.js b/test/modernization/f02-nullish.js new file mode 100644 index 00000000..c57764bc --- /dev/null +++ b/test/modernization/f02-nullish.js @@ -0,0 +1 @@ +let x = null; console.log(x ?? "dflt"); diff --git a/test/modernization/f03-class-fields.js b/test/modernization/f03-class-fields.js new file mode 100644 index 00000000..c37c900f --- /dev/null +++ b/test/modernization/f03-class-fields.js @@ -0,0 +1 @@ +class A { x = 1; static y = 2; } console.log(new A().x, A.y); diff --git a/test/modernization/f04-private-fields.js b/test/modernization/f04-private-fields.js new file mode 100644 index 00000000..04ce7bb5 --- /dev/null +++ b/test/modernization/f04-private-fields.js @@ -0,0 +1 @@ +class A { #x = 1; get() { return this.#x; } } console.log(new A().get()); diff --git a/test/modernization/f05-async-await.js b/test/modernization/f05-async-await.js new file mode 100644 index 00000000..655d24dc --- /dev/null +++ b/test/modernization/f05-async-await.js @@ -0,0 +1 @@ +async function f() { return 1; } f().then((v) => console.log(v)); diff --git a/test/modernization/f06-exponent.js b/test/modernization/f06-exponent.js new file mode 100644 index 00000000..a34cd308 --- /dev/null +++ b/test/modernization/f06-exponent.js @@ -0,0 +1 @@ +console.log(2 ** 10); diff --git a/test/modernization/f07-object-spread.js b/test/modernization/f07-object-spread.js new file mode 100644 index 00000000..b715fdfe --- /dev/null +++ b/test/modernization/f07-object-spread.js @@ -0,0 +1 @@ +let a = {x: 1}; let b = {...a, y: 2}; console.log(b.x + b.y); diff --git a/test/modernization/f08-object-rest.js b/test/modernization/f08-object-rest.js new file mode 100644 index 00000000..a21fc55e --- /dev/null +++ b/test/modernization/f08-object-rest.js @@ -0,0 +1 @@ +let {x, ...rest} = {x: 1, y: 2, z: 3}; console.log(x, rest.y + rest.z); diff --git a/test/modernization/f09-async-gen.js b/test/modernization/f09-async-gen.js new file mode 100644 index 00000000..b7a173c7 --- /dev/null +++ b/test/modernization/f09-async-gen.js @@ -0,0 +1 @@ +async function* g() { yield 1; } g().next().then((r) => console.log(r.value)); diff --git a/test/modernization/f10-for-await.js b/test/modernization/f10-for-await.js new file mode 100644 index 00000000..28378664 --- /dev/null +++ b/test/modernization/f10-for-await.js @@ -0,0 +1 @@ +async function f() { for await (let x of [1]) console.log(x); } f(); diff --git a/test/modernization/f11-bigint.js b/test/modernization/f11-bigint.js new file mode 100644 index 00000000..c0fb865a --- /dev/null +++ b/test/modernization/f11-bigint.js @@ -0,0 +1 @@ +console.log(10n + 32n); diff --git a/test/modernization/f12-string-methods.js b/test/modernization/f12-string-methods.js new file mode 100644 index 00000000..ddcb852e --- /dev/null +++ b/test/modernization/f12-string-methods.js @@ -0,0 +1 @@ +console.log("abc".padStart(5, "-"), "aa".replaceAll("a", "b"), "xy".at(-1)); diff --git a/test/modernization/f13-array-methods.js b/test/modernization/f13-array-methods.js new file mode 100644 index 00000000..6b7148fe --- /dev/null +++ b/test/modernization/f13-array-methods.js @@ -0,0 +1 @@ +console.log([1,[2,[3]]].flat(2).join(","), [1,2,3].includes(2), [1,2,3].at(-1), [3,1,2].findLast((x) => x < 3)); diff --git a/test/modernization/f14-object-methods.js b/test/modernization/f14-object-methods.js new file mode 100644 index 00000000..30112c2e --- /dev/null +++ b/test/modernization/f14-object-methods.js @@ -0,0 +1 @@ +console.log(Object.entries({a:1}).length, Object.values({a:2})[0], Object.fromEntries([["k",1]]).k); diff --git a/test/modernization/f15-symbol-iterator.js b/test/modernization/f15-symbol-iterator.js new file mode 100644 index 00000000..230aca5c --- /dev/null +++ b/test/modernization/f15-symbol-iterator.js @@ -0,0 +1 @@ +let o = { *[Symbol.iterator]() { yield 1; yield 2; } }; console.log([...o].join(",")); diff --git a/test/modernization/f16-getter-shorthand.js b/test/modernization/f16-getter-shorthand.js new file mode 100644 index 00000000..ece5a2c6 --- /dev/null +++ b/test/modernization/f16-getter-shorthand.js @@ -0,0 +1 @@ +let n = 1; let o = {n}; console.log(o.n); diff --git a/test/modernization/f17-computed-methods.js b/test/modernization/f17-computed-methods.js new file mode 100644 index 00000000..63baa220 --- /dev/null +++ b/test/modernization/f17-computed-methods.js @@ -0,0 +1 @@ +let k = "m"; let o = { [k]() { return 7; } }; console.log(o.m()); diff --git a/test/modernization/f18-tagged-raw.js b/test/modernization/f18-tagged-raw.js new file mode 100644 index 00000000..982fdad6 --- /dev/null +++ b/test/modernization/f18-tagged-raw.js @@ -0,0 +1 @@ +function t(s) { return s.raw[0]; } console.log(t`a\\nb`.length); diff --git a/test/modernization/f19-labeled-block.js b/test/modernization/f19-labeled-block.js new file mode 100644 index 00000000..ac87c667 --- /dev/null +++ b/test/modernization/f19-labeled-block.js @@ -0,0 +1 @@ +outer: { console.log("in"); break outer; console.log("no"); } console.log("out"); diff --git a/test/modernization/f20-getter-setter-proto.js b/test/modernization/f20-getter-setter-proto.js new file mode 100644 index 00000000..36700f74 --- /dev/null +++ b/test/modernization/f20-getter-setter-proto.js @@ -0,0 +1 @@ +let o = {get x() { return 1; }, __proto__: {z: 9}}; console.log(o.x, o.z); diff --git a/test/modernization/f21-new-target.js b/test/modernization/f21-new-target.js new file mode 100644 index 00000000..5e2e8cfd --- /dev/null +++ b/test/modernization/f21-new-target.js @@ -0,0 +1 @@ +function F() { console.log(new.target === F); } new F(); F(); diff --git a/test/modernization/f22-trailing-comma-fn.js b/test/modernization/f22-trailing-comma-fn.js new file mode 100644 index 00000000..4fe48f67 --- /dev/null +++ b/test/modernization/f22-trailing-comma-fn.js @@ -0,0 +1 @@ +function f(a, b,) { return a + b; } console.log(f(1, 2,)); diff --git a/test/modernization/f23-catch-no-param.js b/test/modernization/f23-catch-no-param.js new file mode 100644 index 00000000..acdb72fc --- /dev/null +++ b/test/modernization/f23-catch-no-param.js @@ -0,0 +1 @@ +try { throw 1; } catch { console.log("caught"); } diff --git a/test/modernization/f24-regex-flags.js b/test/modernization/f24-regex-flags.js new file mode 100644 index 00000000..a0bde51b --- /dev/null +++ b/test/modernization/f24-regex-flags.js @@ -0,0 +1 @@ +console.log("aAa".replace(/a/gi, "x"), /./s ? "s-ok" : ""); diff --git a/test/modernization/f25-destructure-default-fn.js b/test/modernization/f25-destructure-default-fn.js new file mode 100644 index 00000000..d333c9bc --- /dev/null +++ b/test/modernization/f25-destructure-default-fn.js @@ -0,0 +1 @@ +function f({a = 1, b = 2} = {}) { return a + b; } console.log(f(), f({a: 10})); diff --git a/test/modernization/f26-generator-return.js b/test/modernization/f26-generator-return.js new file mode 100644 index 00000000..6264fdfb --- /dev/null +++ b/test/modernization/f26-generator-return.js @@ -0,0 +1 @@ +function* g() { try { yield 1; } finally { console.log("fin"); } } let it = g(); it.next(); it.return(5); diff --git a/test/modernization/f27-map-set.js b/test/modernization/f27-map-set.js new file mode 100644 index 00000000..53856803 --- /dev/null +++ b/test/modernization/f27-map-set.js @@ -0,0 +1 @@ +let m = new Map([["a",1]]); let s = new Set([1,1,2]); console.log(m.get("a"), s.size); diff --git a/test/modernization/f28-promise.js b/test/modernization/f28-promise.js new file mode 100644 index 00000000..18d49434 --- /dev/null +++ b/test/modernization/f28-promise.js @@ -0,0 +1 @@ +Promise.resolve(42).then((v) => console.log(v)); diff --git a/test/modernization/f29-proxy.js b/test/modernization/f29-proxy.js new file mode 100644 index 00000000..e307a6f0 --- /dev/null +++ b/test/modernization/f29-proxy.js @@ -0,0 +1 @@ +let p = new Proxy({}, {get: () => 7}); console.log(p.anything); diff --git a/test/modernization/f30-getters-on-class.js b/test/modernization/f30-getters-on-class.js new file mode 100644 index 00000000..151e5a29 --- /dev/null +++ b/test/modernization/f30-getters-on-class.js @@ -0,0 +1 @@ +class A { get x() { return 1; } static get y() { return 2; } } console.log(new A().x, A.y); diff --git a/test/modernization/f31-logical-assign.js b/test/modernization/f31-logical-assign.js new file mode 100644 index 00000000..59a4c1c8 --- /dev/null +++ b/test/modernization/f31-logical-assign.js @@ -0,0 +1 @@ +let a = null; a ??= 5; let b = 0; b ||= 6; let c = 1; c &&= 7; console.log(a, b, c); diff --git a/test/modernization/f32-globalthis.js b/test/modernization/f32-globalthis.js new file mode 100644 index 00000000..45d474a2 --- /dev/null +++ b/test/modernization/f32-globalthis.js @@ -0,0 +1 @@ +console.log(typeof globalThis); diff --git a/test/modernization/f33-array-destructure-swap.js b/test/modernization/f33-array-destructure-swap.js new file mode 100644 index 00000000..2a1a4219 --- /dev/null +++ b/test/modernization/f33-array-destructure-swap.js @@ -0,0 +1 @@ +let a = 1, b = 2; [a, b] = [b, a]; console.log(a, b); diff --git a/test/modernization/f34-shorthand-async-method.js b/test/modernization/f34-shorthand-async-method.js new file mode 100644 index 00000000..93667f47 --- /dev/null +++ b/test/modernization/f34-shorthand-async-method.js @@ -0,0 +1 @@ +let o = { async m() { return 3; } }; o.m().then((v) => console.log(v)); From 6f850c09e848904460f771b08219b7b7f96993ff Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 11:44:19 -0700 Subject: [PATCH 050/146] fix the four behavioral bugs from the modernization census MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Regex `i` and `m` flags were parsed into the RegExp object but never passed to PCRE (`/a/gi` matched case-sensitively since forever). PCRE_CASELESS/PCRE_MULTILINE are wired through, and the compiler no longer silently drops `y`/`u` from regex literals. regexp-flags1.js. - `__proto__:` in an object literal now lowers as a prototype definition (SetPrototypeOf; non-object values silently ignored per PropertyDefinitionEvaluation) instead of an own property, via a new _ejs_object_literal_set_proto runtime entry. object19.js. - generator.return() is implemented: resuming a suspended generator throws an unforgeable sentinel through the body — finally blocks run — and the desugared body's outermost catch converts it into a normal return. Fixed alongside it: `return x` in a generator body used to lose its value ({undefined, done:true}); next/throw/return on a completed generator used to resume a dead ucontext (UB); and gen->started was never set, so the not-started fast paths never distinguished anything. generator22.js; generator8.js (the kangax %GeneratorPrototype%.return test) un-xfailed. - The parser ran with tolerant: true, silently compiling partial ASTs from ANY syntax error (`async m() {}` object methods compiled to nonsense). Tolerant mode masked a second bug: the driver never passed sourceType "module", so every import statement produced a recoverable script-mode parse error that tolerance swallowed. Now: sourceType "module" (which also makes parsing spec-correctly strict) and hard parse errors. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- docs/plans.md | 8 +++ lib/common-ids.js | 2 + lib/eir/intrinsics.js | 2 + lib/eir/lower.js | 34 ++++++++-- lib/passes/desugar-generator-functions.js | 34 +++++++++- lib/passes/gather-imports.js | 10 ++- lib/runtime.js | 24 +++++++ runtime/ejs-generator.c | 78 +++++++++++++++++++++-- runtime/ejs-generator.h | 13 ++++ runtime/ejs-object.c | 10 +++ runtime/ejs-object.h | 1 + runtime/ejs-regexp.c | 5 +- test/generator22.js | 54 ++++++++++++++++ test/generator8.js | 1 - test/modernization/README.md | 15 +++-- test/object19.js | 15 +++++ test/regexp-flags1.js | 8 +++ 17 files changed, 293 insertions(+), 21 deletions(-) create mode 100644 test/generator22.js create mode 100644 test/object19.js create mode 100644 test/regexp-flags1.js diff --git a/docs/plans.md b/docs/plans.md index 6094fabd..02d2cea2 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -104,6 +104,14 @@ maintains test262, which is far larger. The effort: object methods parse but silently miscompile). A test262 subset probe should follow for exhaustiveness. - Implement in payoff order; wire probes into CI as they green. +- **Un-fork the JS external-deps**: esprima/escodegen/estraverse/esutils + live in `external-deps/` as lightly-patched copies (build-system + compatibility). Move to published npm packages where possible — and + note that published esprima is unmaintained and still lacks the + parser-gap features above, so the parser slot likely wants a + maintained ESTree-compatible parser (acorn) behind the same + interface; escodegen/estraverse/esutils can come from npm as-is if + the local patches prove to be build-glue only (diff them first). Sequenced after the TypeScript port — new-feature work is safer with types underneath it. diff --git a/lib/common-ids.js b/lib/common-ids.js index 17a8497a..44f3530b 100644 --- a/lib/common-ids.js +++ b/lib/common-ids.js @@ -11,6 +11,8 @@ export const makeClosureNoEnv_id = identifier("%makeClosureNoEnv"); export const makeAnonClosure_id = identifier("%makeAnonClosure"); export const makeGenerator_id = identifier("%makeGenerator"); export const generatorYield_id = identifier("%generatorYield"); +export const generatorIsReturnSentinel_id = identifier("%generatorIsReturnSentinel"); +export const generatorReturnValue_id = identifier("%generatorReturnValue"); export const setSlot_id = identifier("%setSlot"); export const slot_id = identifier("%slot"); export const invokeClosure_id = identifier("%invokeClosure"); diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js index 01d1ce20..6683caef 100644 --- a/lib/eir/intrinsics.js +++ b/lib/eir/intrinsics.js @@ -47,6 +47,8 @@ export const eir_intrinsics = { // so both intrinsics are plain runtime calls "%makeGenerator": { runtime: "make_generator" }, "%generatorYield": { runtime: "generator_yield" }, + "%generatorIsReturnSentinel": { runtime: "generator_is_return_sentinel" }, + "%generatorReturnValue": { runtime: "generator_return_value" }, // DesugarDestructuring (array patterns iterate via a runtime wrapper) "%createIteratorWrapper": { runtime: "iterator_wrapper_new" }, diff --git a/lib/eir/lower.js b/lib/eir/lower.js index a7de6ff0..68df84ca 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.js @@ -415,7 +415,8 @@ class LowerFunction { let hasComputed = n.properties.some( (p) => p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal) ); - if (!hasComputed) { + let hasProto = n.properties.some((p) => this.isProtoProp(p)); + if (!hasComputed && !hasProto) { let keys = []; let values = []; for (let p of n.properties) { @@ -424,11 +425,17 @@ class LowerFunction { } return this.b.emit("make_object", values, { keys: keys }); } - // computed keys: empty object + per-property stores in - // source order (key evaluates before value, per spec) + // computed keys or a `__proto__:` definition: empty object + // + per-property stores in source order (key evaluates + // before value, per spec) let obj = this.b.emit("make_object", [], { keys: [] }); for (let p of n.properties) { - if (!p.computed && (p.key.type === b.Identifier || p.key.type === b.Literal)) { + if (this.isProtoProp(p)) { + let v = this.expr(p.value); + this.b.emit("call_runtime", [obj, v], { + name: "object_literal_set_proto", + }); + } else if (!p.computed && (p.key.type === b.Identifier || p.key.type === b.Literal)) { let v = this.expr(p.value); this.b.emit("set_prop_atom", [obj, v], { atom: p.key.type === b.Identifier ? p.key.name : String(p.key.value), @@ -446,6 +453,16 @@ class LowerFunction { } } + // `__proto__: expr` in an object literal (non-computed, non-method, + // non-shorthand, string or identifier key) is a prototype definition, + // not an own property (B.3.1 / PropertyDefinitionEvaluation) + isProtoProp(p) { + if (p.computed || p.method || p.shorthand) return false; + if (p.kind && p.kind !== "init") return false; + if (p.key.type === b.Identifier) return p.key.name === "__proto__"; + return p.key.type === b.Literal && p.key.value === "__proto__"; + } + // an object literal containing get/set accessors: empty object, then // per-property defines in source order. a non-computed get/set PAIR // for one name becomes a single define_accessor (name-keyed — keying @@ -473,6 +490,11 @@ class LowerFunction { } if (p.key.type !== b.Identifier && p.key.type !== b.Literal) throw LowerNotSupported(`accessor object literal key ${p.key.type}`, n.loc); + if (this.isProtoProp(p)) { + let v = this.expr(p.value); + this.b.emit("call_runtime", [obj, v], { name: "object_literal_set_proto" }); + continue; + } let name = p.key.type === b.Identifier ? p.key.name : String(p.key.value); if (p.kind && p.kind !== "init") { if (done.has(name)) continue; // the pair lowered together @@ -517,7 +539,9 @@ class LowerFunction { let flags = (n.value.global ? "g" : "") + (n.value.multiline ? "m" : "") + - (n.value.ignoreCase ? "i" : ""); + (n.value.ignoreCase ? "i" : "") + + (n.value.sticky ? "y" : "") + + (n.value.unicode ? "u" : ""); return this.b.emit("make_regexp", [], { source: n.value.source, flags: flags, diff --git a/lib/passes/desugar-generator-functions.js b/lib/passes/desugar-generator-functions.js index faa38043..114b4f3a 100644 --- a/lib/passes/desugar-generator-functions.js +++ b/lib/passes/desugar-generator-functions.js @@ -24,7 +24,12 @@ import { TransformPass } from "../node-visitor"; import * as b from "../ast-builder"; -import { makeGenerator_id, generatorYield_id } from "../common-ids"; +import { + makeGenerator_id, + generatorYield_id, + generatorIsReturnSentinel_id, + generatorReturnValue_id, +} from "../common-ids"; import { intrinsic, startGenerator } from "../echo-util"; import { reportError, reportWarning } from "../errors"; @@ -40,7 +45,32 @@ export class DesugarGeneratorFunctions extends TransformPass { if (n.generator) this.mapping.unshift(b.identifier(`%_gen_${this.genGen()}`)); n = super.visitFunction(n); if (n.generator) { - let old_body = n.body; + // the body wraps in a catch that converts the runtime's + // .return() sentinel into a normal return: gen.return(v) + // resumes the suspended yield by throwing the sentinel, so + // finally blocks run, and this outermost catch completes the + // generator with v (see _ejs_Generator_prototype_return) + let exc_id = b.identifier(`%_genexc_${this.genGen()}`); + let old_body = b.blockStatement([ + b.tryStatement( + n.body, + [b.catchClause( + exc_id, + b.blockStatement([ + b.ifStatement( + intrinsic(generatorIsReturnSentinel_id, [b.identifier(exc_id.name)]), + b.returnStatement( + intrinsic(generatorReturnValue_id, [ + b.identifier(this.mapping[0].name), + ]) + ), + b.throwStatement(b.identifier(exc_id.name)) + ), + ]) + )], + null + ), + ]); n.body = b.blockStatement([ b.letDeclaration( this.mapping[0], diff --git a/lib/passes/gather-imports.js b/lib/passes/gather-imports.js index 79391ee4..50f447a8 100644 --- a/lib/passes/gather-imports.js +++ b/lib/passes/gather-imports.js @@ -281,7 +281,15 @@ function parseFile(filename, content, options) { } options.stdout_writer.write(`PARSE ${output_name}`); } - return esprima.parse(content, { loc: true, raw: true, tolerant: true }); + // NOT tolerant: true — tolerant mode collects parse errors into + // ast.errors and returns a partial AST, which we would then + // silently miscompile (e.g. `async m() {}` object methods + // compiled to nonsense). a program that doesn't parse must fail + // loudly here. sourceType "module" is what makes import/export + // parse at all (tolerant mode used to recover past the spurious + // script-mode error on every import) and, per spec, makes the + // parse strict. + return esprima.parse(content, { loc: true, raw: true, sourceType: "module" }); } catch (e) { console.warn(`${filename}: ${e}:`); process.exit(-1); diff --git a/lib/runtime.js b/lib/runtime.js index 392e7d3e..56847d42 100644 --- a/lib/runtime.js +++ b/lib/runtime.js @@ -158,6 +158,22 @@ const runtime_interface = { ty.EjsValue, ]); }, + generator_is_return_sentinel: function () { + return this.abi.createExternalFunction( + this.module, + "_ejs_generator_is_return_sentinel", + ty.EjsValue, + [ty.EjsValue] + ); + }, + generator_return_value: function () { + return this.abi.createExternalFunction( + this.module, + "_ejs_generator_return_value", + ty.EjsValue, + [ty.EjsValue] + ); + }, generator_yield: function () { return this.abi.createExternalFunction(this.module, "_ejs_generator_yield", ty.EjsValue, [ ty.EjsValue, @@ -288,6 +304,14 @@ const runtime_interface = { ty.EjsValue, ]); }, + object_literal_set_proto: function () { + return this.abi.createExternalFunction( + this.module, + "_ejs_object_literal_set_proto", + ty.EjsValue, + [ty.EjsValue, ty.EjsValue] + ); + }, object_set_prototype_of: function () { return this.abi.createExternalFunction( this.module, diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 2b03764c..64e33f02 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -121,10 +121,13 @@ _ejs_generator_start(EJSGenerator* gen) { _ejs_gc_push_generator(gen); ejsval undef_this = _ejs_undefined; - _ejs_invoke_closure(gen->body, &undef_this, 0, NULL, _ejs_undefined); + ejsval rv = _ejs_invoke_closure(gen->body, &undef_this, 0, NULL, _ejs_undefined); _ejs_gc_pop_generator(); - gen->yielded_value = _ejs_create_iter_result(_ejs_undefined, _ejs_true); + // the body's return value is the final iteration result's value + // (`function* g() { return 5; }` -> { value: 5, done: true }) + gen->completed = EJS_TRUE; + gen->yielded_value = _ejs_create_iter_result(rv, _ejs_true); } // makecontext's variadic arguments are ints, so a 64-bit pointer passed @@ -146,6 +149,9 @@ _ejs_generator_new (ejsval generator_body) rv->body = generator_body; rv->started = EJS_FALSE; + rv->completed = EJS_FALSE; + rv->throwing = EJS_FALSE; + rv->returning = EJS_FALSE; rv->yielded_value = _ejs_undefined; rv->sent_value = _ejs_undefined; @@ -177,12 +183,21 @@ _ejs_generator_yield (ejsval generator, ejsval arg) { _ejs_throw (gen->sent_value); } + if (gen->returning) { + gen->returning = EJS_FALSE; + // unwind the generator body: finally blocks run; the desugared + // body's outer catch recognizes the sentinel and returns + // gen->sent_value (see DesugarGeneratorFunctions) + _ejs_throw (_ejs_generator_return_sentinel); + } + return gen->sent_value; } static ejsval _ejs_generator_send (ejsval generator, ejsval arg) { EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(generator); + gen->started = EJS_TRUE; gen->yielded_value = _ejs_undefined; gen->sent_value = arg; swapcontext(&gen->caller_context, &gen->generator_context); @@ -199,6 +214,24 @@ _ejs_generator_throw (ejsval generator, ejsval arg) { return gen->yielded_value; } +// the unforgeable value .return() throws through the generator body to +// unwind it (running finally blocks); the desugared body's outermost +// catch converts it into a normal return +ejsval _ejs_generator_return_sentinel EJSVAL_ALIGNMENT; + +ejsval +_ejs_generator_is_return_sentinel (ejsval exc) +{ + return BOOLEAN_TO_EJSVAL(EJSVAL_EQ(exc, _ejs_generator_return_sentinel)); +} + +ejsval +_ejs_generator_return_value (ejsval generator) +{ + EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(generator); + return gen->sent_value; +} + static EJS_NATIVE_FUNC(_ejs_Generator_prototype_throw) { ejsval O = *_this; if (!EJSVAL_IS_OBJECT(O)) @@ -207,12 +240,40 @@ static EJS_NATIVE_FUNC(_ejs_Generator_prototype_throw) { if (!EJSVAL_IS_GENERATOR(O)) _ejs_throw_nativeerror_utf8(EJS_TYPE_ERROR, ".throw called on non-generator"); + EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(O); + // 25.3.3.4: throwing at a completed (or never-started) generator + // just throws the exception in the caller + if (gen->completed || !gen->started) + _ejs_throw (argc > 0 ? args[0] : _ejs_undefined); + return _ejs_generator_throw(O, argc > 0 ? args[0] : _ejs_undefined); } static EJS_NATIVE_FUNC(_ejs_Generator_prototype_return) { - printf ("generator .return not implemented\n"); - abort(); + ejsval O = *_this; + if (!EJSVAL_IS_OBJECT(O)) + _ejs_throw_nativeerror_utf8(EJS_TYPE_ERROR, ".return called on non-object"); + + if (!EJSVAL_IS_GENERATOR(O)) + _ejs_throw_nativeerror_utf8(EJS_TYPE_ERROR, ".return called on non-generator"); + + EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(O); + ejsval arg = argc > 0 ? args[0] : _ejs_undefined; + + // not yet started, or already done: complete without running the body + if (!gen->started || gen->completed) { + gen->completed = EJS_TRUE; + return _ejs_create_iter_result(arg, _ejs_true); + } + + // suspended at a yield: resume with the return sentinel. finally + // blocks run; unless one of them yields or overrides the completion, + // the body's outer catch returns `arg` and the generator completes. + gen->returning = EJS_TRUE; + gen->yielded_value = _ejs_undefined; + gen->sent_value = arg; + swapcontext(&gen->caller_context, &gen->generator_context); + return gen->yielded_value; } static EJS_NATIVE_FUNC(_ejs_Generator_prototype_next) { @@ -223,6 +284,12 @@ static EJS_NATIVE_FUNC(_ejs_Generator_prototype_next) { if (!EJSVAL_IS_GENERATOR(O)) _ejs_throw_nativeerror_utf8(EJS_TYPE_ERROR, ".next called on non-generator"); + EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(O); + // 25.3.3.3: a completed generator keeps answering { undefined, true } + // (resuming the dead context would be undefined behavior) + if (gen->completed) + return _ejs_create_iter_result(_ejs_undefined, _ejs_true); + return _ejs_generator_send(O, argc > 0 ? args[0] : _ejs_undefined); } @@ -255,6 +322,9 @@ _ejs_generator_init(ejsval global) _ejs_gc_add_root (&_ejs_Generator_prototype); _ejs_Generator_prototype = _ejs_object_new(_ejs_Iterator_prototype, &_ejs_Generator_specops); + _ejs_gc_add_root (&_ejs_generator_return_sentinel); + _ejs_generator_return_sentinel = _ejs_object_new(_ejs_null, &_ejs_Object_specops); + #define PROTO_METHOD(x) EJS_INSTALL_ATOM_FUNCTION_FLAGS (_ejs_Generator_prototype, x, _ejs_Generator_prototype_##x, EJS_PROP_NOT_ENUMERABLE | EJS_PROP_WRITABLE | EJS_PROP_CONFIGURABLE) PROTO_METHOD(next); diff --git a/runtime/ejs-generator.h b/runtime/ejs-generator.h index a9d84a47..9e9734af 100644 --- a/runtime/ejs-generator.h +++ b/runtime/ejs-generator.h @@ -27,12 +27,25 @@ typedef struct { // when true, we throw from the yield point. when false we simply return EJSBool throwing; + // when true, the resume is a .return(): the yield point throws the + // return sentinel (sent_value holds the return value) + EJSBool returning; + + // the body ran to completion (normally, or via the return sentinel); + // next/throw/return on a completed generator must not resume the + // dead context + EJSBool completed; + void* stack; ucontext_t generator_context; ucontext_t caller_context; } EJSGenerator; +extern ejsval _ejs_generator_return_sentinel; +ejsval _ejs_generator_is_return_sentinel (ejsval exc); +ejsval _ejs_generator_return_value (ejsval generator); + extern ejsval _ejs_IteratorWrapper_prototype; extern EJSSpecOps _ejs_IteratorWrapper_specops; diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 9261010d..5f20f26a 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -1048,6 +1048,16 @@ _ejs_object_set_prototype_of (ejsval obj, ejsval proto) return _ejs_Object_setPrototypeOf(_ejs_undefined, &undef_this, 2, args, _ejs_undefined); } +// `__proto__: value` in an object literal: set the prototype when value +// is an object or null, silently ignore anything else +// (PropertyDefinitionEvaluation / B.3.1) +ejsval +_ejs_object_literal_set_proto (ejsval obj, ejsval proto) +{ + if (!EJSVAL_IS_OBJECT(proto) && !EJSVAL_IS_NULL(proto)) return obj; + return _ejs_object_set_prototype_of (obj, proto); +} + // ECMA262: 19.1.2.6 Object.getOwnPropertyDescriptor ( O, P ) static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyDescriptor) { ejsval O = _ejs_undefined; diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index fa27c3a8..09b42837 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -286,6 +286,7 @@ extern EJS_NATIVE_FUNC(_ejs_Object_prototype_toString); // exposed so we can call the native implementation during class creation ejsval _ejs_object_set_prototype_of (ejsval obj, ejsval proto); +ejsval _ejs_object_literal_set_proto (ejsval obj, ejsval proto); ejsval _ejs_object_create (ejsval proto); diff --git a/runtime/ejs-regexp.c b/runtime/ejs-regexp.c index e94278c8..998b4c5a 100644 --- a/runtime/ejs-regexp.c +++ b/runtime/ejs-regexp.c @@ -227,8 +227,11 @@ RegExpInitialize(ejsval obj, ejsval pattern, ejsval flags) { const char *pcre_error; int pcre_erroffset; + int pcre_options = PCRE_UTF16 | PCRE_NO_UTF16_CHECK; + if (re->ignoreCase) pcre_options |= PCRE_CASELESS; + if (re->multiline) pcre_options |= PCRE_MULTILINE; re->compiled_pattern = pcre16_compile(chars, - PCRE_UTF16 | PCRE_NO_UTF16_CHECK, + pcre_options, &pcre_error, &pcre_erroffset, pcre16_tables); diff --git a/test/generator22.js b/test/generator22.js new file mode 100644 index 00000000..bbcb1e1f --- /dev/null +++ b/test/generator22.js @@ -0,0 +1,54 @@ +// generator.return(): finally blocks run, the return value lands in the +// final iteration result, and completed generators answer correctly. + +function* g() { + try { + yield 1; + yield 2; + } finally { + console.log("fin"); + } +} + +let it = g(); +console.log(JSON.stringify(it.next())); +console.log(JSON.stringify(it.return(5))); +console.log(JSON.stringify(it.next())); + +// the body's return value is the final result's value +function* h() { + yield 1; + return 42; +} +let it2 = h(); +console.log(JSON.stringify(it2.next())); +console.log(JSON.stringify(it2.next())); +console.log(JSON.stringify(it2.next())); + +// .return before the first next: the body never runs +let it3 = g(); +console.log(JSON.stringify(it3.return(9))); +console.log(JSON.stringify(it3.next())); + +// .throw resumes at the yield: catch and finally both run +function* k() { + try { + yield 1; + } catch (e) { + console.log("caught", e); + } finally { + console.log("kfin"); + } + console.log("after"); +} +let it4 = k(); +console.log(JSON.stringify(it4.next())); +console.log(JSON.stringify(it4.throw("x"))); + +// .throw at a never-started generator throws in the caller +let it5 = k(); +try { + it5.throw("early"); +} catch (e) { + console.log("caller caught", e); +} diff --git a/test/generator8.js b/test/generator8.js index 11f457aa..29460b96 100644 --- a/test/generator8.js +++ b/test/generator8.js @@ -1,5 +1,4 @@ // generator: babel-node -// xfail: generator support isn't 100% // "%GeneratorPrototype%.return" from kangax diff --git a/test/modernization/README.md b/test/modernization/README.md index c71978b5..339c2568 100644 --- a/test/modernization/README.md +++ b/test/modernization/README.md @@ -25,6 +25,7 @@ Census as of 2026-07-10 (post legacy-pipeline deletion): | f22 | trailing comma in function params | | f23 | optional catch binding `catch {}` | | f31 | logical assignment `??=` `\|\|=` `&&=` | +| f34 | `async` object methods (was a silent miscompile; now a loud parse error) | ## Runtime/stdlib gaps — 4 @@ -35,14 +36,14 @@ Census as of 2026-07-10 (post legacy-pipeline deletion): | f14 | `Object.entries` / `values` / `fromEntries` | | f32 | `globalThis` | -## Behavioral divergences (bugs) — 4 +## Behavioral divergences — ALL FIXED (2026-07-10) -| probe | divergence | -|---|---| -| f20 | `__proto__:` in an object literal doesn't set the prototype | -| f24 | `"aAa".replace(/a/gi, "x")` → `"xAx"` (ignoreCase lost when combined with global) | -| f26 | `generator.return()` not implemented in the runtime | -| f34 | **HAZARD**: `async m() {}` object method PARSES but silently miscompiles (no parse error, wrong behavior) — should be rejected until async lands | +| probe | divergence | fix | +|---|---|---| +| f20 | `__proto__:` literal didn't set the prototype | lowered as SetPrototypeOf (`_ejs_object_literal_set_proto`); suite test object19.js | +| f24 | regex `i`/`m` flags parsed but never passed to PCRE | `PCRE_CASELESS`/`PCRE_MULTILINE` wired through (and the compiler no longer drops `y`/`u`); suite test regexp-flags1.js | +| f26 | `generator.return()` unimplemented (and `return x` in a generator body lost its value; next/throw on a completed generator resumed a dead context) | return-sentinel unwind through the body (finally runs), completed-state tracking; suite test generator22.js | +| f34 | `async m() {}` parsed and silently miscompiled | root cause was `tolerant: true` parsing — partial ASTs from ANY syntax error were silently compiled; tolerant mode removed, parse errors are loud now (this moves f34 to the parser-gap column) | ## Already working (17) diff --git a/test/object19.js b/test/object19.js new file mode 100644 index 00000000..a274e2ac --- /dev/null +++ b/test/object19.js @@ -0,0 +1,15 @@ +// `__proto__:` in an object literal is a prototype definition, not an +// own property (PropertyDefinitionEvaluation / B.3.1) + +let o = { get x() { return 1; }, __proto__: { z: 9 } }; +console.log(o.x, o.z); + +let q = { __proto__: null, a: 1 }; +console.log(q.a, typeof q.toString); + +// non-object values are silently ignored +let r = { __proto__: 42, b: 2 }; +console.log(r.b, typeof r.toString); + +let s = { "__proto__": { w: 3 }, c: 4 }; +console.log(s.c, s.w); diff --git a/test/regexp-flags1.js b/test/regexp-flags1.js new file mode 100644 index 00000000..fba6902d --- /dev/null +++ b/test/regexp-flags1.js @@ -0,0 +1,8 @@ +// regex flags must reach the matcher: ignoreCase and multiline were +// parsed into the RegExp object but never passed to PCRE + +console.log("aAa".replace(/a/gi, "x")); +console.log(/HeLLo/i.test("hello")); +console.log("a\nb".replace(/^b/m, "B")); +console.log("AbC".match(/[a-z]+/i)[0]); +console.log(/x/i.flags ? /x/gi.ignoreCase : "no-flags"); From 101cc5624bb19e7e7d276aa94e93a75c00e74dec Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 12:09:00 -0700 Subject: [PATCH 051/146] ts: build plumbing + first ports (debug, errors, stack) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The TypeScript port begins. New //lib:tsjs genrule: .ts sources compile through tsc (strict, noUncheckedIndexedAccess, noImplicitOverride; flags mirrored in tsconfig.json for editors), .js sources pass through unchanged while the port is incremental. Its output tree (ejs-es6.js + lib/**.js, plain ES-module JS) is what //lib:generated babels for the node-hosted stage0 AND what //:srcdir-tree stages for stage1+ self-compiles — so every stage builds from tsc-emitted code. First ports: debug.ts (typed log overloads), errors.ts (the port immediately caught a latent bug: reportWarning consulted ReportType.warning, which never existed — the warning path worked by accident), stack-es6.ts (generic Stack), and an estree.ts stub that grows with the ast-builder port. Dead lib/stack.js and lib/map.js deleted. typescript@7 + @types/node as dev dependencies (ambient, untracked by buck, same treatment as babel). Full matrix green: test-eir, test-stage0..3 (byte-identity fixed point over tsc-emitted sources). Co-Authored-By: Claude Fable 5 --- BUCK | 4 +- buck-srcdir-tree.sh | 10 +- docs/plans.md | 14 ++ lib/BUCK | 35 +-- lib/buck-gen-js.sh | 27 +- lib/buck-gen-tsjs.sh | 63 +++++ lib/debug.js | 50 ---- lib/debug.ts | 55 ++++ lib/errors.js | 43 ---- lib/errors.ts | 53 ++++ lib/estree.ts | 17 ++ lib/map.js | 95 ------- lib/stack-es6.js | 28 --- lib/stack-es6.ts | 31 +++ lib/stack.js | 35 --- package-lock.json | 579 ++++++++++++++++++++++++++++++++++++++++++- package.json | 4 +- tsconfig.json | 16 ++ 18 files changed, 871 insertions(+), 288 deletions(-) create mode 100644 lib/buck-gen-tsjs.sh delete mode 100644 lib/debug.js create mode 100644 lib/debug.ts delete mode 100644 lib/errors.js create mode 100644 lib/errors.ts create mode 100644 lib/estree.ts delete mode 100644 lib/map.js delete mode 100644 lib/stack-es6.js create mode 100644 lib/stack-es6.ts delete mode 100644 lib/stack.js create mode 100644 tsconfig.json diff --git a/BUCK b/BUCK index e89b56d3..3b43d8b0 100644 --- a/BUCK +++ b/BUCK @@ -37,9 +37,9 @@ genrule( ' "$(location //external-deps:pcre-build[lib])"' + ' "$(location //external-deps:double-conversion-build)"' + ' "$(location //external-deps:compiler-js)"' + - ' "$(location //lib:es6-srcs)"' + + ' "$(location //lib:tsjs)"' + ' "$(location //lib:host-config.js)"' + - ' "$(location :ejs-es6.js)"' + + ' "$(location //lib:tsjs)"' + ' "$(location //node-compat:node-compat.ejs)"' + ' "$(location //node-compat:node-compat[static])"' + ' "$(location //ejs-llvm:ejs-llvm.ejs)"' + diff --git a/buck-srcdir-tree.sh b/buck-srcdir-tree.sh index 6d88a428..e0f20df2 100644 --- a/buck-srcdir-tree.sh +++ b/buck-srcdir-tree.sh @@ -22,9 +22,9 @@ ICC_O="$6" # //runtime:platform-icc-o PCRE_A="$7" # //external-deps:pcre-build[lib] DC_A="$8" # //external-deps:double-conversion-build EXT_JS="$9" # //external-deps:compiler-js -LIB_JS="${10}" # //lib:es6-srcs +LIB_JS="${10}" # //lib:tsjs (compiled+passed-through compiler JS) HOST_CONFIG="${11}" # //lib:host-config.js -EJS_MAIN="${12}" # //:ejs-es6.js +EJS_MAIN="${12}" # //lib:tsjs (again; driver at its root) NC_EJS="${13}" # //node-compat:node-compat.ejs NC_A="${14}" # //node-compat:node-compat[static] LLVM_EJS="${15}" # //ejs-llvm:ejs-llvm.ejs @@ -68,11 +68,11 @@ mkdir -p "$ROOT/external-deps/double-conversion-$OSNAME/double-conversion" cp "$DC_A" "$ROOT/external-deps/double-conversion-$OSNAME/double-conversion/libdouble-conversion.a" cp -RL "$EXT_JS"/. "$ROOT/external-deps/" -# compiler sources +# compiler sources (the tsjs tree: tsc output + passed-through JS) mkdir -p "$ROOT/lib" -cp -RL "$LIB_JS"/. "$ROOT/lib/" +cp -RL "$LIB_JS/lib"/. "$ROOT/lib/" cp "$HOST_CONFIG" "$ROOT/lib/host-config.js" -cp "$EJS_MAIN" "$ROOT/ejs-es6.js" +cp "$EJS_MAIN/ejs-es6.js" "$ROOT/ejs-es6.js" # native modules mkdir -p "$ROOT/node-compat" diff --git a/docs/plans.md b/docs/plans.md index 02d2cea2..87cc4076 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -112,6 +112,20 @@ maintains test262, which is far larger. The effort: maintained ESTree-compatible parser (acorn) behind the same interface; escodegen/estraverse/esutils can come from npm as-is if the local patches prove to be build-glue only (diff them first). + Parser choice: keep the slot interface-shaped (the compiler consumes + ESTree; parser behind one module) with **@babel/parser + its estree + plugin as the default** — it's where stage proposals land first + (decorators, pipeline, pattern matching as enableable plugins), which + we want access to; it's zero-dependency and bundles flat for + vendoring. Acorn remains the cheap-swap alternative. The MAAM + analysis framework consumes ESTree and has no dependency on any + particular parser (it happens to use acorn today only as an ESTree + producer) — so the compiler/analysis contract is the ESTree shape of + the post-desugar tree, and the parser choice is free on both sides. + Self-hosting wrinkle: either + parser's own source is newer JS than echojs parses, so vendor a + mechanically-regenerable transpiled build (babel to the supported + subset), shrinking the transpile step as modernization features land. Sequenced after the TypeScript port — new-feature work is safer with types underneath it. diff --git a/lib/BUCK b/lib/BUCK index 5a1807aa..c65960c5 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -10,19 +10,29 @@ genrule( visibility = ["PUBLIC"], ) -# The ES6 compiler sources as they are staged into the --srcdir tree for -# self-compilation (host-config.js is added there separately since it is -# generated). -filegroup( - name = "es6-srcs", +# The compiler as plain ES-module JS: .ts sources compiled through tsc +# (strict), .js sources copied through unchanged during the incremental +# TypeScript port. Layout: $OUT/ejs-es6.js + $OUT/lib/**.js. This is +# what stage1+ self-compiles (via //:srcdir-tree) and what the babel +# step below consumes for the node-hosted stage0. +genrule( + name = "tsjs", srcs = glob( [ "*.js", + "*.ts", "passes/*.js", + "passes/*.ts", "eir/*.js", + "eir/*.ts", ], exclude = ["host-config.js"], - ), + ) + [ + "buck-gen-tsjs.sh", + "//:ejs-es6.js", + ], + out = "tsjs", + cmd = "bash $SRCDIR/buck-gen-tsjs.sh", visibility = ["PUBLIC"], ) @@ -31,20 +41,13 @@ filegroup( # Layout matches lib/generated/ from the Makefile build. genrule( name = "generated", - srcs = glob( - [ - "*.js", - "passes/*.js", - "eir/*.js", - ], - exclude = ["host-config.js"], - ) + [ + srcs = [ "buck-gen-js.sh", ":host-config.js", - "//:ejs-es6.js", + ":tsjs", "//external-deps:compiler-js", ], out = "generated", - cmd = "bash $SRCDIR/buck-gen-js.sh", + cmd = "bash $SRCDIR/buck-gen-js.sh $(location :tsjs)", visibility = ["PUBLIC"], ) diff --git a/lib/buck-gen-js.sh b/lib/buck-gen-js.sh index abaca79e..e39bfedd 100644 --- a/lib/buck-gen-js.sh +++ b/lib/buck-gen-js.sh @@ -1,7 +1,8 @@ #!/bin/bash # Invoked by //lib:generated. Produces the equivalent of lib/generated/: -# the compiler sources run through babel (so stage0 can run under node), -# with the same import rewrites lib/Makefile applies: +# the compiler (the //lib:tsjs tree — tsc-compiled + passed-through JS) +# run through babel (so stage0 can run under node), with the same import +# rewrites lib/Makefile applies: # "@llvm" -> "llvm" (resolved via NODE_PATH to node-llvm) # "@node-compat/"-> "" (use node's own os/path/fs/...) # @@ -11,6 +12,8 @@ # buck2 always places under /buck-out/. set -euo pipefail +TSJS="$1" # //lib:tsjs — $TSJS/ejs-es6.js + $TSJS/lib/**.js + REPO="${TMP%%/buck-out/*}" BABEL_JS="$REPO/node_modules/@babel/cli/bin/babel.js" BABELRC="$REPO/.babelrc" @@ -26,23 +29,23 @@ run_babel() { > "$dst" } -cd "$SRCDIR" - -for f in *.js passes/*.js eir/*.js; do - case "$f" in - ejs-es6.js) continue ;; - esac - run_babel "$f" "$OUTABS/lib/$f" +(cd "$TSJS/lib" && find . -name "*.js" | sed 's,^\./,,') | while read -r f; do + run_babel "$TSJS/lib/$f" "$OUTABS/lib/$f" done -run_babel ejs-es6.js "$OUTABS/ejs-es6.js" +run_babel "$TSJS/ejs-es6.js" "$OUTABS/ejs-es6.js" + +cd "$SRCDIR" + +# host-config.js is generated (staged at $SRCDIR root by the genrule) +run_babel host-config.js "$OUTABS/lib/host-config.js" for f in esprima/esprima-es6.js \ escodegen/escodegen-es6.js \ estraverse/estraverse-es6.js \ esutils/esutils-es6.js \ esutils/lib/code.js \ - esutils/lib/ast.js \ - esutils/lib/keyword.js; do + esutils/lib/keyword.js \ + esutils/lib/ast.js; do run_babel "compiler-js/$f" "$OUTABS/external-deps/$f" done diff --git a/lib/buck-gen-tsjs.sh b/lib/buck-gen-tsjs.sh new file mode 100644 index 00000000..5f9ffe1e --- /dev/null +++ b/lib/buck-gen-tsjs.sh @@ -0,0 +1,63 @@ +#!/bin/bash +# Invoked by //lib:tsjs. Produces the compiler as plain ES-module JS: +# .ts sources compile through tsc (strict; flags mirror tsconfig.json), +# .js sources copy through unchanged (the port is incremental). Output +# layout: +# $OUT/ejs-es6.js +# $OUT/lib/{*.js, passes/*.js, eir/*.js} +# Both //lib:generated (babel for the node-hosted stage0) and +# //:srcdir-tree (stage1+ self-compiles) consume this tree. +# +# typescript comes from the repo's node_modules, which buck2 doesn't +# track as an input (same treatment as babel in buck-gen-js.sh). +set -euo pipefail + +REPO="${TMP%%/buck-out/*}" +TSC="$REPO/node_modules/typescript/bin/tsc" + +mkdir -p "$OUT" +OUTABS="$(cd "$OUT" && pwd)" + +cd "$SRCDIR" + +# stage into the output layout; tsc emits over the same tree +STAGE="$TMP/tsjs-stage" +rm -rf "$STAGE" +mkdir -p "$STAGE/lib" + +for f in *.js *.ts passes/*.js passes/*.ts eir/*.js eir/*.ts; do + [ -e "$f" ] || continue + case "$f" in + ejs-es6.js|ejs-es6.ts) continue ;; + esac + mkdir -p "$STAGE/lib/$(dirname "$f")" + cp "$f" "$STAGE/lib/$f" +done +for f in ejs-es6.js ejs-es6.ts; do + if [ -e "$f" ]; then cp "$f" "$STAGE/$f"; fi +done + +# copy the .js files through +(cd "$STAGE" && find . -name "*.js" | while read -r f; do + mkdir -p "$OUTABS/$(dirname "$f")" + cp "$f" "$OUTABS/$f" +done) + +# compile the .ts files (flags mirror tsconfig.json) +TS_FILES=$(cd "$STAGE" && find . -name "*.ts" | sort) +if [ -n "$TS_FILES" ]; then + (cd "$STAGE" && node "$TSC" \ + --ignoreConfig \ + --strict \ + --noUncheckedIndexedAccess \ + --noImplicitOverride \ + --noEmitOnError \ + --target es2016 \ + --module esnext \ + --moduleResolution bundler \ + --types node \ + --typeRoots "$REPO/node_modules/@types" \ + --rootDir . \ + --outDir "$OUTABS" \ + $TS_FILES) +fi diff --git a/lib/debug.js b/lib/debug.js deleted file mode 100644 index e92773db..00000000 --- a/lib/debug.js +++ /dev/null @@ -1,50 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -let _indent = 0; -let _debug_level = 0; - -export function log() { - let level = 3; - let msg = null; - - if (arguments.length > 1) { - level = arguments[0]; - msg = arguments[1]; - } else if (arguments.length == 1) { - msg = arguments[0]; - } - - if (_debug_level < level) return; - - if (typeof msg === "function") msg = msg(); - - if (msg) - //console.warn(`${' '.repeat(_indent)}${msg}`); - console.warn(msg); -} - -export function indent() { - _indent += 1; -} -export function unindent() { - _indent -= 1; - if (_indent < 0) { - console.warn("indent level mismatch. setting to 0"); - _indent = 0; - } -} -export function setLevel(x) { - _debug_level = x; -} - -export function time(level, id) { - if (_debug_level < level) return; - console.time(id); -} - -export function timeEnd(level, id) { - if (_debug_level < level) return; - console.timeEnd(id); -} diff --git a/lib/debug.ts b/lib/debug.ts new file mode 100644 index 00000000..17105a53 --- /dev/null +++ b/lib/debug.ts @@ -0,0 +1,55 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +type Message = string | (() => string); + +let _indent = 0; +let _debug_level = 0; + +export function log(msg: Message): void; +export function log(level: number, msg: Message): void; +export function log(levelOrMsg: number | Message, maybeMsg?: Message): void { + let level: number; + let msg: Message; + + if (maybeMsg !== undefined) { + level = levelOrMsg as number; + msg = maybeMsg; + } else { + level = 3; + msg = levelOrMsg as Message; + } + + if (_debug_level < level) return; + + const text = typeof msg === "function" ? msg() : msg; + + if (text) console.warn(text); +} + +export function indent(): void { + _indent += 1; +} + +export function unindent(): void { + _indent -= 1; + if (_indent < 0) { + console.warn("indent level mismatch. setting to 0"); + _indent = 0; + } +} + +export function setLevel(x: number): void { + _debug_level = x; +} + +export function time(level: number, id: string): void { + if (_debug_level < level) return; + console.time(id); +} + +export function timeEnd(level: number, id: string): void { + if (_debug_level < level) return; + console.timeEnd(id); +} diff --git a/lib/errors.js b/lib/errors.js deleted file mode 100644 index e4c978d1..00000000 --- a/lib/errors.js +++ /dev/null @@ -1,43 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -class SourceError extends Error { - constructor(errorType, message, filename, loc = { start: { line: -1, column: -2 } }) { - super(message); - this.errorType = errorType; - this.message = message; - this.filename = filename; - this.loc = loc; - } - - reportToUser() { - throw this; - } - - toString() { - return `${this.filename}:${this.loc.start.line}:${this.loc.start.column + 1}: ${ - this.errorType - }: ${this.message}`; - } -} - -const ReportType = { - error: 0, - warn: 1, -}; - -function reportToUser(type, errorType, message, filename, loc) { - if (type === ReportType.error) throw new SourceError(errorType.name, message, filename, loc); - else if (loc && loc.start) - console.warn(`${filename}:${loc.start.line}:${loc.start.column + 1}: warning: ${message}`); - else console.warn(`${filename}:-1:-1: warning: ${message}`); -} - -export function reportError(errorType, message, filename, loc) { - reportToUser(ReportType.error, errorType, message, filename, loc); -} - -export function reportWarning(message, filename, loc) { - reportToUser(ReportType.warning, null, message, filename, loc); -} diff --git a/lib/errors.ts b/lib/errors.ts new file mode 100644 index 00000000..b0cdb7c2 --- /dev/null +++ b/lib/errors.ts @@ -0,0 +1,53 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +import type { SourceLocation } from "./estree"; + +// callers pass an Error subclass constructor (TypeError, ReferenceError, +// ...) whose name labels the diagnostic +export type ErrorType = { name: string }; + +class SourceError extends Error { + errorType: string; + filename: string; + loc: SourceLocation; + + constructor( + errorType: string, + message: string, + filename: string, + loc: SourceLocation = { start: { line: -1, column: -2 } } + ) { + super(message); + this.errorType = errorType; + this.message = message; + this.filename = filename; + this.loc = loc; + } + + reportToUser(): never { + throw this; + } + + override toString(): string { + return `${this.filename}:${this.loc.start.line}:${this.loc.start.column + 1}: ${ + this.errorType + }: ${this.message}`; + } +} + +export function reportError( + errorType: ErrorType, + message: string, + filename: string, + loc?: SourceLocation +): never { + throw new SourceError(errorType.name, message, filename, loc); +} + +export function reportWarning(message: string, filename: string, loc?: SourceLocation): void { + if (loc && loc.start) + console.warn(`${filename}:${loc.start.line}:${loc.start.column + 1}: warning: ${message}`); + else console.warn(`${filename}:-1:-1: warning: ${message}`); +} diff --git a/lib/estree.ts b/lib/estree.ts new file mode 100644 index 00000000..ec43a85f --- /dev/null +++ b/lib/estree.ts @@ -0,0 +1,17 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// The compiler's ESTree dialect. Grows as the port proceeds; the goal +// is a faithful description of what the esprima fork produces plus the +// extensions our passes hang off the nodes. + +export interface Position { + line: number; + column: number; +} + +export interface SourceLocation { + start: Position; + end?: Position; +} diff --git a/lib/map.js b/lib/map.js deleted file mode 100644 index 02ce32c5..00000000 --- a/lib/map.js +++ /dev/null @@ -1,95 +0,0 @@ -(function () { - var echo_util = require("echo-util"); - var foldl = echo_util.foldl; - - var hasOwn = Object.prototype.hasOwnProperty; - - function Map() { - this.map = Object.create(null); - this.map_size = 0; - } - - Map.prototype.has = function (key) { - return hasOwn.call(this.map, "%map" + JSON.stringify(key)); - }; - - Map.prototype.set = function (key, val) { - var entry_key = "%map" + JSON.stringify(key); - var had_before = hasOwn.call(this.map, entry_key); - this.map[entry_key] = { key: key, val: val }; - if (!had_before) this.map_size++; - }; - - Map.prototype.get = function (key, val) { - var entry_key = "%map" + JSON.stringify(key); - if (!hasOwn.call(this.map, entry_key)) return undefined; - return this.map[entry_key].val; - }; - - Map.prototype.remove = function (key) { - var entry_key = "%map" + JSON.stringify(key); - var had_before = hasOwn.call(this.map, entry_key); - - delete this.map[entry_key]; - if (had_before) this.map_size--; - }; - - Map.prototype.clear = function () { - this.map = Object.create(null); - this.map_size = 0; - }; - - Map.prototype.forEach = function (f) { - for (var p in this.map) { - if (!hasOwn.call(this.map, p)) continue; - var entry = this.map[p]; - f(entry.val, entry.key, this); - } - }; - - Map.prototype.keys = function () { - var result = []; - for (var p in this.map) { - if (!hasOwn.call(this.map, p)) continue; - var entry = this.map[p]; - result.push(entry.key); - } - return result; - }; - Map.prototype.values = function () { - var result = []; - for (var p in this.map) { - if (!hasOwn.call(this.map, p)) continue; - var entry = this.map[p]; - result.push(entry.value); - } - return result; - }; - - Map.prototype.size = function () { - return this.map_size; - }; - - exports.Map = Map; -})(); - -/* -# Set tests - -s1 = new Set [1, 2, 3, 4] -s2 = new Set [5, 6, 7, 8] - -console.log "should be { 1 2 3 4 5 6 7 8 }: #{(s1.union s2).toString()}" - - -s3 = new Set [1, 2, 3, 4, 5, 6, 7, 8] -s4 = new Set [5, 6, 7, 8] - -console.log "should be { 1 2 3 4 }: #{(s3.subtract s4).toString()}" - -s5 = new Set [1, 2, 3, 4]; -s6 = new Set [3, 4, 5]; - -console.log "should be { 3 4 }: #{(s5.intersect s6).toString()}" - -*/ diff --git a/lib/stack-es6.js b/lib/stack-es6.js deleted file mode 100644 index ea483712..00000000 --- a/lib/stack-es6.js +++ /dev/null @@ -1,28 +0,0 @@ -/* -*- Mode: js2; tab-width: 4; indent-tabs-mode: nil; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -export class Stack { - constructor(initial) { - this.stack = []; - if (initial) this.stack.unshift(initial); - } - - push(o) { - this.stack.unshift(o); - } - - pop() { - if (this.stack.length === 0) throw new Error("Stack is empty"); - return this.stack.shift(); - } - - // add a 'top' property to make things a little clearer/nicer to read in the compiler - get top() { - if (this.stack.length === 0) throw new Error("Stack is empty"); - return this.stack[0]; - } - - get depth() { - return this.stack.length; - } -} diff --git a/lib/stack-es6.ts b/lib/stack-es6.ts new file mode 100644 index 00000000..ca847ae0 --- /dev/null +++ b/lib/stack-es6.ts @@ -0,0 +1,31 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +export class Stack { + stack: T[] = []; + + constructor(initial?: T) { + if (initial !== undefined) this.stack.unshift(initial); + } + + push(o: T): void { + this.stack.unshift(o); + } + + pop(): T { + const top = this.stack.shift(); + if (top === undefined) throw new Error("Stack is empty"); + return top; + } + + // a 'top' property makes things a little clearer/nicer to read + get top(): T { + if (this.stack.length === 0) throw new Error("Stack is empty"); + return this.stack[0]!; + } + + get depth(): number { + return this.stack.length; + } +} diff --git a/lib/stack.js b/lib/stack.js deleted file mode 100644 index 14fe2bfb..00000000 --- a/lib/stack.js +++ /dev/null @@ -1,35 +0,0 @@ -(function () { - exports.Stack = (function () { - function Stack(initial) { - this.stack = []; - if (initial) this.stack.unshift(initial); - } - - Stack.prototype.push = function (o) { - this.stack.unshift(o); - }; - - Stack.prototype.pop = function () { - if (this.stack.length === 0) throw new Error("Stack is empty"); - return this.stack.shift(); - }; - - // add a 'top' property to make things a little clearer/nicer to read in the compiler - - Object.defineProperty(Stack.prototype, "top", { - get: function () { - if (this.stack.length === 0) throw new Error("Stack is empty"); - return this.stack[0]; - }, - }); - - // and a 'depth' property - Object.defineProperty(Stack.prototype, "depth", { - get: function () { - return this.stack.length; - }, - }); - - return Stack; - })(); -})(); diff --git a/package-lock.json b/package-lock.json index 3d2931be..d545e8d9 100644 --- a/package-lock.json +++ b/package-lock.json @@ -22,7 +22,9 @@ "ejs": "ejs-driver.js" }, "devDependencies": { - "nan": "^2.28.0" + "@types/node": "^26.1.1", + "nan": "^2.28.0", + "typescript": "^7.0.2" } }, "node_modules/@ampproject/remapping": { @@ -1981,6 +1983,356 @@ "node": ">=14" } }, + "node_modules/@types/node": { + "version": "26.1.1", + "resolved": "https://registry.npmjs.org/@types/node/-/node-26.1.1.tgz", + "integrity": "sha512-nxAkRSVkN1Y0JC1W8ky/fTfkGsMmcrRsbx+3XoZE+rMOX71kLYTV7fLXpqud1GpbpP5TuffXFqfX7fH2GgZREw==", + "dev": true, + "license": "MIT", + "dependencies": { + "undici-types": "~8.3.0" + } + }, + "node_modules/@typescript/typescript-aix-ppc64": { + "version": "7.0.2", + 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+ "@typescript/typescript-linux-arm": "7.0.2", + "@typescript/typescript-linux-arm64": "7.0.2", + "@typescript/typescript-linux-loong64": "7.0.2", + "@typescript/typescript-linux-mips64el": "7.0.2", + "@typescript/typescript-linux-ppc64": "7.0.2", + "@typescript/typescript-linux-riscv64": "7.0.2", + "@typescript/typescript-linux-s390x": "7.0.2", + "@typescript/typescript-linux-x64": "7.0.2", + "@typescript/typescript-netbsd-arm64": "7.0.2", + "@typescript/typescript-netbsd-x64": "7.0.2", + "@typescript/typescript-openbsd-arm64": "7.0.2", + "@typescript/typescript-openbsd-x64": "7.0.2", + "@typescript/typescript-sunos-x64": "7.0.2", + "@typescript/typescript-win32-arm64": "7.0.2", + "@typescript/typescript-win32-x64": "7.0.2" + } + }, "unbox-primitive": { "version": "1.0.2", "resolved": "https://registry.npmjs.org/unbox-primitive/-/unbox-primitive-1.0.2.tgz", @@ -7813,6 +8384,12 @@ "which-boxed-primitive": "^1.0.2" } }, + "undici-types": { + "version": "8.3.0", + "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz", + "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==", + "dev": true + }, "unicode-canonical-property-names-ecmascript": { "version": "2.0.0", "resolved": "https://registry.npmjs.org/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-2.0.0.tgz", diff --git a/package.json b/package.json index 48aaff36..865148a7 100644 --- a/package.json +++ b/package.json @@ -61,6 +61,8 @@ "temp": "^0.9.4" }, "devDependencies": { - "nan": "^2.28.0" + "@types/node": "^26.1.1", + "nan": "^2.28.0", + "typescript": "^7.0.2" } } diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 00000000..2a65d270 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,16 @@ +{ + // Editor/IDE configuration. The build's tsc invocation lives in + // lib/buck-gen-tsjs.sh with the SAME flags — keep them in sync. + "compilerOptions": { + "strict": true, + "noUncheckedIndexedAccess": true, + "noImplicitOverride": true, + "noEmitOnError": true, + "target": "es2016", + "module": "esnext", + "moduleResolution": "bundler", + "types": ["node"], + "noEmit": true + }, + "include": ["ejs-es6.ts", "lib/**/*.ts"] +} From dd8d97e7bd5aab77741451abd961576e6087b18c Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 12:16:56 -0700 Subject: [PATCH 052/146] ts: estree types, ast-builder, common-ids, echo-util; @llvm/@node-compat decls MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit lib/estree.ts is the compiler's ESTree dialect in full: per-node interfaces with discriminated type literals, Expression/Statement/ Pattern/Node unions, dialect quirks documented in place (old-esprima `defaults`, TryStatement.handlers arrays, CatchClause.guard, gather-imports' source_path, the EIR toplevel tags). ast-builder.ts becomes typed constructors over it — the runtime isast() assertions retire in favor of compile-time checking; the never-used array-body labeledStatement quirk is gone. lib/llvm.d.ts declares the "@llvm" native surface the compiler actually uses (opaque interfaces; compiler bookkeeping properties declared optional rather than smuggled). lib/node-compat.d.ts maps "@node-compat/*" onto node's own module types. echo-util.ts drops its dead exports (shallow_copy_object, map, foldl, reject, genGlobal/AnonymousFunctionName, create_intrinsic, is_number_literal). Policy note: `unknown` appears only in exception-boundary type guards (strict TS's catch variables), nowhere else; `any` appears nowhere. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/.compiler.js.swp | Bin 0 -> 16384 bytes lib/ast-builder.js | 364 ------------------ lib/ast-builder.ts | 404 +++++++++++++++++++ lib/{common-ids.js => common-ids.ts} | 4 +- lib/echo-util.js | 157 -------- lib/echo-util.ts | 118 ++++++ lib/estree.ts | 553 ++++++++++++++++++++++++++- lib/llvm.d.ts | 255 ++++++++++++ lib/node-compat.d.ts | 24 ++ 9 files changed, 1353 insertions(+), 526 deletions(-) create mode 100644 lib/.compiler.js.swp delete mode 100644 lib/ast-builder.js create mode 100644 lib/ast-builder.ts rename lib/{common-ids.js => common-ids.ts} (96%) delete mode 100644 lib/echo-util.js create mode 100644 lib/echo-util.ts create mode 100644 lib/llvm.d.ts create mode 100644 lib/node-compat.d.ts diff --git a/lib/.compiler.js.swp b/lib/.compiler.js.swp new file mode 100644 index 0000000000000000000000000000000000000000..073e95a400d675753241917a7bab8c1c1681d59d GIT binary patch literal 16384 zcmeHOTZ|k>73~o0@W{gN>fbQ+t||Yp=^*XrbyMFl^`luMF7^oPi7^oPi7^oPi7^oPi7^oPi7^oQdzhuDiE$eoS z{8b91@%?`q|37t;WhFo#5WpGWH1IKC5AdfOE$e5%*MLWWhk<2a3b28jfj{10Sw8?i z2YeQYfd_zjU=FAQ&tGp@Uj-fpJYXI;0PF&O`EJX47WfkIMIZpWzz2ZafPcKpvc3;| z1Nb`N0Ph2S{Z7kz0=Ne_155%n;1}<(tWN_zumH>ghk--D&A^YYgDt=%;5={)H~`!V zyty0W0bT+w1CIj_0hfS}0Ds$MS$_py1D*j+0LK9a{Qd2g^-bUz;Ax--G=W**M&K(* zUR(rX-~r$`Fby09ZUf#ATnoH_oW_#?h2e#seYYw(=fr{IhP(y>%xiKcyQGp4 zRYBAiwhTqmiUz$Mh#Jcyr&q9iL@Nyp=Fx|=J3LubYA{l zHpw=%4(OpPEvAXqkB@40WG;Rkq?mlmtDFU)^-- z?7Sx;nMhkEaS(NCL0o71d=YWB9wc36Ok}~3jr%5-A+>LKG`?s?GVuA_9DdESR*QKu zh$D=l&cM&?F;GMUr`NVanTzvgh2f}yl+>pT<=QQ!+q@N8r^RZ$o#gJIvmiX0+}go9 z!{7E(p@eCICx>){dC8OcK^((~RH2$Xy*Q}Dpv`JZvFOvJO53N7C-dnHdBQS^iaTP? zk%6ZvoX`RjSF`b>gUF*E3Iit9DLvb1R`okooLjv;SE(IDO*6u}j+}5Ih}N7AFRn~% z5YoZg#%zXb5rrF!U%+O;kHA9iGj~G^={>tovPASl2!y#I#BpKBbW5*)Z=a>)3U5g~ zD4Yms#lid(yGqgcwrwYrJ5#C5^>MU>W8`VewNjp1!v|Mt(@tcz?PPnhvV~7)AszmH z;0}V&$FJ@5d6Lfdf3V<7vvq#iN(Vuo`oyJkY?%0~4RCw=Q}a^u^+KXOe>%n?#p5KE z$Ok~XX0$hGSZUFjX`UZSLLZeab2iG>-c4l+O(RXy)=J^nRyC%vlZc))J95$K)4s?^ zP;%6f+~~O?B(e0E)|B6?%hld$J07oTr3G3u75XtdszN_(enX7rMd3 zWWFjD%T(72QehgXaR6v7kDUE6_eAU~uSrho4b|b%k}7TbXe<*aPVVLryn#f-qw6B@ zA-@ATeUv~@U*uy~MrWH?378FCk|Du-t+xe4%SELYIIdaNC9@BxNpR7<9rP_4Ip+3DVN$4p?y}r=3%HxR#9&xS9>sfm&M%7b2HKfqbZNta{_d4yi*NXZr!&Mh{V&IK|+ceG6Cpy@jD^g7MxX?K--iH+YtCxXsE zTi2Y41)RrZ0|$gUmtu&j_1IjR(+4qXf?i+53EO0+noFnPkm8}swpcqBJvL!a@gSZe zH+5nr7xV<4uU-QAv*w9fYJerpJ6MFg*y>(*m?!3%1yKpdqyburQo|CuGVghKg%?!O z54#(KBnWd|`+R5yyoVKR+v&Q}g!(QamY*ikf!PCr#o7YGjS2nQBQ5*%~ z48wh6J@Aw6G&?dwk_{s$+HG`^mAd4JHVTDMZ&CdJIAYY_BZj5;KmGpvGGhGafyaPH zfqCG)z|RraQ`}E6KL@TLhJP0L4)7RoKk#vY0k0v3e*yRj@HFrg@F=hjTmY7V2Jl3!vP%gl3arp{Ry($JO1}X+B2L9^|=tP}PzhthX3MwvWN6yYOfJmXWEf4BBT`h_aJ(pWlJ%`5MlwC6EKlinG`lk1Zb8L!+V$w{4-FaskrYM36Ob%x{F~2tDB>GP5 z^rYQG&Z4HSRYF%?*(ww!cX)hLy@$qqV_+hXF{3Z82O^Nn7?*b%%L=Ga&bgg9Yh1P{ za!3%;>qO5;3(D6}i=r_)NK~0h2bomFP=zf^fg-XqPUNc^y+89K0M$_-yId+_l@6Y1 zMeGIHngD(Ip(hYxb92fxr02BTBJ`1qXX~-kM;NG=eE!`*HjjpsdHtWT_aR?c zEA26M0HNTjM4}fFCY?#Pw~lWL>TCkjO6gzP5^Mrjhtt!C2-nMR+@eBgyTd*Tiz+i1 z8nbVHPBu*>JDkX(g<3k@HZ=isGHAo}1nGMd8Je?EuN-@5I!C8h&5aR7#BLK&Gv2% zwc1)SOpukP1|5#36u=C}qADq@8%oS0WF)JU z^xXmN9QFM{Kj`x?h!EsDDfvkk+t+iVea2prcVMvkzj3{$$W#oX6swyN=sC=0sXPL+ zN^^Tt6C@&aZ2B&ue|86gYb+{CDKb6l=>SschSQ0JOi*v~0+JHH%;jwnb4u-`6vM#) qsmv8gcgT1sN6Mj 0) { - decls.push(variableDeclarator(isast(rest.shift()), isnullableast(rest.shift()))); - } - return { type: VariableDeclaration, kind: kind, declarations: decls }; - } -} -export function constDeclaration(...rest) { - return variableDeclaration("const", ...rest); -} -export function letDeclaration(...rest) { - return variableDeclaration("let", ...rest); -} -export function varDeclaration(...rest) { - return variableDeclaration("var", ...rest); -} - -export function variableDeclarator(id, init = undefined) { - return { type: VariableDeclarator, id: isast(id), init: init }; -} -export function whileStatement(test, body) { - return { type: WhileStatement, test: isast(test), body: isast(body) }; -} - -export function undefinedLit() { - return unaryExpression("void", literal(0)); -} -export function nullLit() { - return literal(null); -} diff --git a/lib/ast-builder.ts b/lib/ast-builder.ts new file mode 100644 index 00000000..47259c4b --- /dev/null +++ b/lib/ast-builder.ts @@ -0,0 +1,404 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Typed constructors for the compiler's ESTree dialect (see estree.ts), +// plus the node-type string constants the passes switch over. + +import type * as e from "./estree"; + +export const ArrayExpression = "ArrayExpression" as const; +export const ArrayPattern = "ArrayPattern" as const; +export const AssignmentPattern = "AssignmentPattern" as const; +export const ArrowFunctionExpression = "ArrowFunctionExpression" as const; +export const AssignmentExpression = "AssignmentExpression" as const; +export const BinaryExpression = "BinaryExpression" as const; +export const BlockStatement = "BlockStatement" as const; +export const BreakStatement = "BreakStatement" as const; +export const CallExpression = "CallExpression" as const; +export const CatchClause = "CatchClause" as const; +export const ClassBody = "ClassBody" as const; +export const ClassDeclaration = "ClassDeclaration" as const; +export const ClassExpression = "ClassExpression" as const; +export const ClassHeritage = "ClassHeritage" as const; +export const ComprehensionBlock = "ComprehensionBlock" as const; +export const ComprehensionExpression = "ComprehensionExpression" as const; +export const ConditionalExpression = "ConditionalExpression" as const; +export const ContinueStatement = "ContinueStatement" as const; +export const DebuggerStatement = "DebuggerStatement" as const; +export const DoWhileStatement = "DoWhileStatement" as const; +export const EmptyStatement = "EmptyStatement" as const; +export const ExportAllDeclaration = "ExportAllDeclaration" as const; +export const ExportDefaultDeclaration = "ExportDefaultDeclaration" as const; +export const ExportNamedDeclaration = "ExportNamedDeclaration" as const; +export const ExportSpecifier = "ExportSpecifier" as const; +export const ExpressionStatement = "ExpressionStatement" as const; +export const ForInStatement = "ForInStatement" as const; +export const ForOfStatement = "ForOfStatement" as const; +export const ForStatement = "ForStatement" as const; +export const FunctionDeclaration = "FunctionDeclaration" as const; +export const FunctionExpression = "FunctionExpression" as const; +export const Identifier = "Identifier" as const; +export const IfStatement = "IfStatement" as const; +export const ImportDeclaration = "ImportDeclaration" as const; +export const ImportSpecifier = "ImportSpecifier" as const; +export const ImportDefaultSpecifier = "ImportDefaultSpecifier" as const; +export const ImportNamespaceSpecifier = "ImportNamespaceSpecifier" as const; +export const LabeledStatement = "LabeledStatement" as const; +export const Literal = "Literal" as const; +export const LogicalExpression = "LogicalExpression" as const; +export const MemberExpression = "MemberExpression" as const; +export const MetaProperty = "MetaProperty" as const; +export const MethodDefinition = "MethodDefinition" as const; +export const ModuleDeclaration = "ModuleDeclaration" as const; +export const NewExpression = "NewExpression" as const; +export const ObjectExpression = "ObjectExpression" as const; +export const ObjectPattern = "ObjectPattern" as const; +export const Program = "Program" as const; +export const Property = "Property" as const; +export const RestElement = "RestElement" as const; +export const ReturnStatement = "ReturnStatement" as const; +export const SequenceExpression = "SequenceExpression" as const; +export const SpreadElement = "SpreadElement" as const; +export const Super = "Super" as const; +export const SwitchCase = "SwitchCase" as const; +export const SwitchStatement = "SwitchStatement" as const; +export const TaggedTemplateExpression = "TaggedTemplateExpression" as const; +export const TemplateElement = "TemplateElement" as const; +export const TemplateLiteral = "TemplateLiteral" as const; +export const ThisExpression = "ThisExpression" as const; +export const ThrowStatement = "ThrowStatement" as const; +export const TryStatement = "TryStatement" as const; +export const UnaryExpression = "UnaryExpression" as const; +export const UpdateExpression = "UpdateExpression" as const; +export const VariableDeclaration = "VariableDeclaration" as const; +export const VariableDeclarator = "VariableDeclarator" as const; +export const WhileStatement = "WhileStatement" as const; +export const WithStatement = "WithStatement" as const; +export const YieldExpression = "YieldExpression" as const; + +export function arrayExpression( + els: (e.Expression | e.SpreadElement | null)[] = [] +): e.ArrayExpression { + return { type: ArrayExpression, elements: els }; +} + +export function arrowFunctionExpression( + params: e.Pattern[], + body: e.BlockStatement | e.Expression, + defaults: (e.Expression | null)[] = [], + expression = false +): e.ArrowFunctionExpression { + return { + type: ArrowFunctionExpression, + id: null, + params, + defaults, + body, + generator: false, + expression, + }; +} + +export function assignmentExpression( + l: e.Expression | e.Pattern, + op: e.AssignmentOperator, + r: e.Expression +): e.AssignmentExpression { + return { type: AssignmentExpression, operator: op, left: l, right: r }; +} + +export function binaryExpression( + l: e.Expression, + op: e.BinaryOperator, + r: e.Expression +): e.BinaryExpression { + return { type: BinaryExpression, operator: op, left: l, right: r }; +} + +export function blockStatement( + stmts: e.Statement[] = [], + loc: e.SourceLocation | null = null +): e.BlockStatement { + return { type: BlockStatement, body: stmts, loc }; +} + +export function breakStatement(label: e.Identifier | null = null): e.BreakStatement { + return { type: BreakStatement, label }; +} + +export function callExpression( + callee: e.Expression | e.Super, + args: (e.Expression | e.SpreadElement)[] = [] +): e.CallExpression { + return { type: CallExpression, callee, arguments: args }; +} + +export function catchClause( + param: e.Pattern, + body: e.BlockStatement, + guard: e.Expression | null = null +): e.CatchClause { + return { type: CatchClause, body, param, guard }; +} + +export function conditionalExpression( + test: e.Expression, + consequent: e.Expression, + alternate: e.Expression +): e.ConditionalExpression { + return { type: ConditionalExpression, test, consequent, alternate }; +} + +export function continueStatement(label: e.Identifier | null = null): e.ContinueStatement { + return { type: ContinueStatement, label }; +} + +export function emptyStatement(): e.EmptyStatement { + return { type: EmptyStatement }; +} + +export function expressionStatement(exp: e.Expression): e.ExpressionStatement { + return { type: ExpressionStatement, expression: exp }; +} + +export function forInStatement( + left: e.VariableDeclaration | e.Pattern, + right: e.Expression, + body: e.Statement +): e.ForInStatement { + return { type: ForInStatement, left, right, body }; +} + +export function forOfStatement( + left: e.VariableDeclaration | e.Pattern, + right: e.Expression, + body: e.Statement +): e.ForOfStatement { + return { type: ForOfStatement, left, right, body }; +} + +export function forStatement( + init: e.VariableDeclaration | e.Expression | null, + test: e.Expression | null, + update: e.Expression | null, + body: e.Statement +): e.ForStatement { + return { type: ForStatement, init, test, update, body }; +} + +export function functionDeclaration( + id: e.Identifier, + params: e.Pattern[], + body: e.BlockStatement, + defaults: (e.Expression | null)[] = [] +): e.FunctionDeclaration { + return { + type: FunctionDeclaration, + id, + params, + body, + defaults, + generator: false, + expression: false, + }; +} + +export function functionExpression( + id: e.Identifier | null, + params: e.Pattern[], + body: e.BlockStatement, + defaults: (e.Expression | null)[] = [] +): e.FunctionExpression { + return { + type: FunctionExpression, + id, + params, + body, + defaults, + generator: false, + expression: false, + }; +} + +export function identifier(name: string): e.Identifier { + return { type: Identifier, name }; +} + +export function ifStatement( + test: e.Expression, + consequent: e.Statement, + alternate: e.Statement | null = null +): e.IfStatement { + return { type: IfStatement, test, consequent, alternate }; +} + +export function labeledStatement(label: e.Identifier, body: e.Statement): e.LabeledStatement { + return { type: LabeledStatement, label, body }; +} + +export function literal(val: string | number | boolean | null): e.Literal { + return { + type: Literal, + value: val, + raw: typeof val === "string" ? `'${val}'` : `${val}`, + }; +} + +export function logicalExpression( + l: e.Expression, + op: "||" | "&&", + r: e.Expression +): e.LogicalExpression { + return { type: LogicalExpression, left: l, right: r, operator: op }; +} + +export function memberExpression( + obj: e.Expression | e.Super, + prop: e.Expression, + computed = false +): e.MemberExpression { + return { type: MemberExpression, object: obj, property: prop, computed }; +} + +export function metaProperty(meta: e.Identifier, property: e.Identifier): e.MetaProperty { + return { type: MetaProperty, meta, property }; +} + +export function methodDefinition( + key: e.Expression, + value: e.FunctionExpression, + kind: e.MethodDefinition["kind"] = "init" +): e.MethodDefinition { + return { type: MethodDefinition, key, value, kind }; +} + +export function objectExpression(properties: e.Property[]): e.ObjectExpression { + return { type: ObjectExpression, properties }; +} + +export function property( + key: e.Expression, + value: e.Expression | e.Pattern, + kind: e.Property["kind"] = "init", + computed = false +): e.Property { + return { type: Property, key, value, kind, computed }; +} + +export function restElement(arg: e.Pattern): e.RestElement { + return { type: RestElement, argument: arg }; +} + +export function returnStatement(arg: e.Expression | null): e.ReturnStatement { + return { type: ReturnStatement, argument: arg }; +} + +export function sequenceExpression(expressions: e.Expression[]): e.SequenceExpression { + return { type: SequenceExpression, expressions }; +} + +export function spreadElement(arg: e.Expression): e.SpreadElement { + return { type: SpreadElement, argument: arg }; +} + +export function superExpression(): e.Super { + return { type: Super }; +} + +export function switchCase(test: e.Expression | null, consequent: e.Statement[]): e.SwitchCase { + return { type: SwitchCase, test, consequent }; +} + +export function thisExpression(): e.ThisExpression { + return { type: ThisExpression }; +} + +export function throwStatement(arg: e.Expression): e.ThrowStatement { + return { type: ThrowStatement, argument: arg }; +} + +export function tryStatement( + block: e.BlockStatement, + handlers: e.CatchClause[], + finalizer: e.BlockStatement | null = null +): e.TryStatement { + return { type: TryStatement, block, handlers, guardedHandlers: [], finalizer }; +} + +export function unaryExpression( + op: e.UnaryExpression["operator"], + arg: e.Expression +): e.UnaryExpression { + return { type: UnaryExpression, operator: op, argument: arg }; +} + +type DeclPair = [e.Pattern, e.Expression | null]; + +// two call shapes: an array of declarators, or alternating id+init +// arguments (id1, init1, id2, init2, ...) +export function variableDeclaration( + kind: e.VariableDeclaration["kind"], + declarations: e.VariableDeclarator[] +): e.VariableDeclaration; +export function variableDeclaration( + kind: e.VariableDeclaration["kind"], + ...pairs: (e.Pattern | e.Expression | null)[] +): e.VariableDeclaration; +export function variableDeclaration( + kind: e.VariableDeclaration["kind"], + ...rest: (e.VariableDeclarator[] | e.Pattern | e.Expression | null)[] +): e.VariableDeclaration { + const first = rest[0]; + if (Array.isArray(first)) { + return { type: VariableDeclaration, kind, declarations: first }; + } + if (rest.length % 2 !== 0) + throw new Error( + "variable declarations must have equal numbers of identifiers and initializers" + ); + const decls: e.VariableDeclarator[] = []; + for (let i = 0; i < rest.length; i += 2) { + const id = rest[i] as e.Pattern; + const init = (rest[i + 1] as e.Expression | null) ?? null; + decls.push(variableDeclarator(id, init)); + } + return { type: VariableDeclaration, kind, declarations: decls }; +} + +export function constDeclaration( + ...rest: (e.Pattern | e.Expression | null)[] +): e.VariableDeclaration { + return variableDeclaration("const", ...rest); +} + +export function letDeclaration( + ...rest: (e.Pattern | e.Expression | null)[] +): e.VariableDeclaration { + return variableDeclaration("let", ...rest); +} + +export function varDeclaration( + ...rest: (e.Pattern | e.Expression | null)[] +): e.VariableDeclaration { + return variableDeclaration("var", ...rest); +} + +export function variableDeclarator( + id: e.Pattern, + init: e.Expression | null | undefined = undefined +): e.VariableDeclarator { + return { type: VariableDeclarator, id, init }; +} + +export function whileStatement(test: e.Expression, body: e.Statement): e.WhileStatement { + return { type: WhileStatement, test, body }; +} + +export function undefinedLit(): e.UnaryExpression { + return unaryExpression("void", literal(0)); +} + +export function nullLit(): e.Literal { + return literal(null); +} diff --git a/lib/common-ids.js b/lib/common-ids.ts similarity index 96% rename from lib/common-ids.js rename to lib/common-ids.ts index 44f3530b..c20281c2 100644 --- a/lib/common-ids.js +++ b/lib/common-ids.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ import { identifier } from "./ast-builder"; diff --git a/lib/echo-util.js b/lib/echo-util.js deleted file mode 100644 index 8cdedbbc..00000000 --- a/lib/echo-util.js +++ /dev/null @@ -1,157 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -//let terminal = require('terminal'); - -import * as b from "./ast-builder"; - -export function shallow_copy_object(o) { - if (!o) return null; - - let new_o = Object.create(Object.getPrototypeOf(o)); - for (let x of Object.getOwnPropertyNames(o)) new_o[x] = o[x]; - return new_o; -} - -export function map(f, seq) { - let rv = []; - for (let el of seq) { - rv.push(f(el)); - } - return rv; -} - -export function foldl(f, z, arr) { - if (arr.length === 0) return z; - - return foldl(f, f(z, arr[0]), arr.slice(1)); -} - -export function reject(o, pred) { - let rv = Object.create(null); - for (let prop of Object.getOwnPropertyNames(o)) { - if (!pred(prop)) rv[prop] = o[prop]; - } - return rv; -} - -export function startGenerator() { - let _gen = 0; - return () => { - let id = _gen; - _gen += 1; - return id; - }; -} - -let filenameGenerator = startGenerator(); - -export function genFreshFileName(x) { - return `${x}.${filenameGenerator()}`; -} - -let functionNameGenerator = startGenerator(); - -export function genGlobalFunctionName(x, filename) { - let prefix = filename ? `__ejs[${filename}]` : "__ejs_fn"; - return `${prefix}_${x}_${functionNameGenerator()}`; -} - -export function genAnonymousFunctionName(filename) { - let prefix = filename ? `__ejs[${filename}]_%anon` : "__ejs_%anon"; - return `${prefix}_${functionNameGenerator()}`; -} - -export function bold() { - /* - if (process && process.stderr && process.stderr.isTTY) - return terminal.ANSIStyle('bold'); - */ - return ""; -} - -export function reset() { - /* - if (process && process.stderr && process.stderr.isTTY) - return terminal.ANSIStyle('reset'); - */ - return ""; -} - -export function underline(str) { - return str + "\n" + "-".repeat(str.length); -} - -export function is_number_literal(n) { - return n.type === b.Literal && typeof n.value === "number"; -} -export function is_string_literal(n) { - return n.type === b.Literal && typeof n.raw === "string"; -} -export function create_intrinsic(id, args, loc) { - return { - type: b.CallExpression, - callee: id, - arguments: args, - loc: loc, - }; -} - -export function is_intrinsic(n, name) { - if (n.type !== b.CallExpression) return false; - if (n.callee.type !== b.Identifier) return false; - if (n.callee.name[0] !== "%") return false; - if (name && n.callee.name !== name) return false; - - return true; -} - -export function intrinsic(id, args, loc) { - let rv = b.callExpression(id, args); - rv.loc = loc; - return rv; -} - -export function sanitize_with_regexp(filename) { - return filename.replace(/[.,-\/\\]/g, "_"); // this is insanely inadequate -} - -export class Writer { - constructor(stream) { - this.stream = stream; - this.have_blank_line = true; - } - - write(msg, want_newline = false) { - if (want_newline) { - if (!this.have_blank_line) { - this.stream.write("\n"); - } - } - let out_msg = String(msg); - if (this.stream.isTTY && this.stream.columns > 0) { - let cols = this.stream.columns; - if (out_msg.length >= cols) { - // we should be awesome here and elide something from - // the middle of the line - let elide_length = out_msg.length - cols + 5; - if (elide_length < 0) { - // XXX something more here... - out_msg = out_msg.substr(0, cols); - } else { - let elide_start = out_msg.length / 2 - elide_length / 2; - let elide_end = out_msg.length / 2 + elide_length / 2; - - out_msg = out_msg.slice(0, elide_start) + " ... " + out_msg.slice(elide_end); - } - } else { - out_msg = out_msg + " ".repeat(cols - out_msg.length); - } - this.stream.write("\r"); - this.stream.write(out_msg); - this.have_blank_line = false; - } else { - this.stream.write(out_msg + "\n"); - } - } -} diff --git a/lib/echo-util.ts b/lib/echo-util.ts new file mode 100644 index 00000000..81474ed1 --- /dev/null +++ b/lib/echo-util.ts @@ -0,0 +1,118 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +import * as b from "./ast-builder"; +import type { + CallExpression, + Expression, + Identifier, + Node, + SourceLocation, + SpreadElement, +} from "./estree"; + +export function startGenerator(): () => number { + let _gen = 0; + return () => { + const id = _gen; + _gen += 1; + return id; + }; +} + +const filenameGenerator = startGenerator(); + +export function genFreshFileName(x: string): string { + return `${x}.${filenameGenerator()}`; +} + +export function bold(): string { + return ""; +} + +export function reset(): string { + return ""; +} + +export function underline(str: string): string { + return str + "\n" + "-".repeat(str.length); +} + +export function is_string_literal(n: Node): boolean { + return n.type === b.Literal && typeof n.raw === "string"; +} + +// a call whose callee is a %-named identifier is a compiler intrinsic +// (a lowering directive minted by the desugar passes, never user code — +// '%' can't appear in a parsed identifier) +export function is_intrinsic(n: Node, name?: string): boolean { + if (n.type !== b.CallExpression) return false; + if (n.callee.type !== b.Identifier) return false; + if (n.callee.name[0] !== "%") return false; + if (name && n.callee.name !== name) return false; + + return true; +} + +export function intrinsic( + id: Identifier, + args: (Expression | SpreadElement)[], + loc?: SourceLocation | null +): CallExpression { + const rv = b.callExpression(id, args); + rv.loc = loc; + return rv; +} + +export function sanitize_with_regexp(filename: string): string { + return filename.replace(/[.,-/\\]/g, "_"); // this is insanely inadequate +} + +interface WritableStream { + write(msg: string): void; + isTTY?: boolean; + columns?: number; +} + +export class Writer { + stream: WritableStream; + have_blank_line = true; + + constructor(stream: WritableStream) { + this.stream = stream; + } + + write(msg: string, want_newline = false): void { + if (want_newline) { + if (!this.have_blank_line) { + this.stream.write("\n"); + } + } + let out_msg = String(msg); + if (this.stream.isTTY && this.stream.columns && this.stream.columns > 0) { + const cols = this.stream.columns; + if (out_msg.length >= cols) { + // we should be awesome here and elide something from + // the middle of the line + const elide_length = out_msg.length - cols + 5; + if (elide_length < 0) { + // XXX something more here... + out_msg = out_msg.substr(0, cols); + } else { + const elide_start = out_msg.length / 2 - elide_length / 2; + const elide_end = out_msg.length / 2 + elide_length / 2; + + out_msg = out_msg.slice(0, elide_start) + " ... " + out_msg.slice(elide_end); + } + } else { + out_msg = out_msg + " ".repeat(cols - out_msg.length); + } + this.stream.write("\r"); + this.stream.write(out_msg); + this.have_blank_line = false; + } else { + this.stream.write(out_msg + "\n"); + } + } +} diff --git a/lib/estree.ts b/lib/estree.ts index ec43a85f..60d0d9cc 100644 --- a/lib/estree.ts +++ b/lib/estree.ts @@ -2,9 +2,23 @@ * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// The compiler's ESTree dialect. Grows as the port proceeds; the goal -// is a faithful description of what the esprima fork produces plus the -// extensions our passes hang off the nodes. +// The compiler's ESTree dialect: what the esprima fork produces, plus +// the properties our passes hang off the nodes. Dialect notes: +// - functions carry `defaults` (old-esprima parameter defaults) and +// may carry `rest`; +// - TryStatement has `handlers` (an array) and `guardedHandlers`; +// - CatchClause has a SpiderMonkey-era `guard`; +// - gather-imports adds `source_path` to import/export declarations; +// - EIR integration tags the toplevel function with eir_module / +// eir_main / ir_func and friends. + +import type { EjsFunction, DISubprogram } from "@llvm"; + +// placeholder until eir/ir.ts lands; replaced by +// import type { Module as EIRModule } from "./eir/ir"; +export interface EIRModule { + name: string; +} export interface Position { line: number; @@ -15,3 +29,536 @@ export interface SourceLocation { start: Position; end?: Position; } + +interface BaseNode { + loc?: SourceLocation | null; +} + +// --- expressions ------------------------------------------------------------ + +export interface ArrayExpression extends BaseNode { + type: "ArrayExpression"; + // elisions (holes) are null elements + elements: (Expression | SpreadElement | null)[]; +} + +export interface ObjectExpression extends BaseNode { + type: "ObjectExpression"; + properties: Property[]; +} + +export interface Property extends BaseNode { + type: "Property"; + key: Expression; + value: Expression | Pattern; + kind: "init" | "get" | "set"; + computed: boolean; + method?: boolean; + shorthand?: boolean; +} + +export interface Identifier extends BaseNode { + type: "Identifier"; + name: string; +} + +export interface Literal extends BaseNode { + type: "Literal"; + value: string | number | boolean | null | RegExp; + raw?: string; +} + +export interface TemplateLiteral extends BaseNode { + type: "TemplateLiteral"; + quasis: TemplateElement[]; + expressions: Expression[]; +} + +export interface TemplateElement extends BaseNode { + type: "TemplateElement"; + value: { cooked: string; raw: string }; + tail: boolean; +} + +export interface TaggedTemplateExpression extends BaseNode { + type: "TaggedTemplateExpression"; + tag: Expression; + quasi: TemplateLiteral; +} + +export interface FunctionBase extends BaseNode { + id: Identifier | null; + params: Pattern[]; + defaults: (Expression | null)[]; + rest?: Identifier | null; + body: BlockStatement | Expression; + generator: boolean; + expression: boolean; + // --- compiler extensions ------------------------------------------------- + // set by insert_toplevel_func on the synthetic module toplevel + toplevel?: boolean; + displayName?: string; + // set by collectEIRToplevel + eir_module?: EIRModule; + eir_main?: string; + // set by compile() for the toplevel wrapper + ir_name?: string; + ir_func?: EjsFunction & { debug_info?: DISubprogram }; +} + +export interface FunctionDeclaration extends FunctionBase { + type: "FunctionDeclaration"; + id: Identifier; + body: BlockStatement; +} + +export interface FunctionExpression extends FunctionBase { + type: "FunctionExpression"; + body: BlockStatement; +} + +export interface ArrowFunctionExpression extends FunctionBase { + type: "ArrowFunctionExpression"; +} + +export interface UnaryExpression extends BaseNode { + type: "UnaryExpression"; + operator: "-" | "+" | "!" | "~" | "typeof" | "void" | "delete"; + prefix?: boolean; + argument: Expression; +} + +export interface UpdateExpression extends BaseNode { + type: "UpdateExpression"; + operator: "++" | "--"; + argument: Expression; + prefix: boolean; +} + +export type BinaryOperator = + | "==" | "!=" | "===" | "!==" + | "<" | "<=" | ">" | ">=" + | "<<" | ">>" | ">>>" + | "+" | "-" | "*" | "/" | "%" + | "|" | "^" | "&" + | "in" | "instanceof"; + +export interface BinaryExpression extends BaseNode { + type: "BinaryExpression"; + operator: BinaryOperator; + left: Expression; + right: Expression; +} + +export type AssignmentOperator = + | "=" | "+=" | "-=" | "*=" | "/=" | "%=" + | "<<=" | ">>=" | ">>>=" | "|=" | "^=" | "&="; + +export interface AssignmentExpression extends BaseNode { + type: "AssignmentExpression"; + operator: AssignmentOperator; + left: Expression | Pattern; + right: Expression; +} + +export interface LogicalExpression extends BaseNode { + type: "LogicalExpression"; + operator: "||" | "&&"; + left: Expression; + right: Expression; +} + +export interface MemberExpression extends BaseNode { + type: "MemberExpression"; + object: Expression | Super; + property: Expression; + computed: boolean; +} + +export interface ConditionalExpression extends BaseNode { + type: "ConditionalExpression"; + test: Expression; + consequent: Expression; + alternate: Expression; +} + +export interface CallExpression extends BaseNode { + type: "CallExpression"; + callee: Expression | Super; + arguments: (Expression | SpreadElement)[]; +} + +export interface NewExpression extends BaseNode { + type: "NewExpression"; + callee: Expression; + arguments: (Expression | SpreadElement)[]; +} + +export interface SequenceExpression extends BaseNode { + type: "SequenceExpression"; + expressions: Expression[]; +} + +export interface SpreadElement extends BaseNode { + type: "SpreadElement"; + argument: Expression; +} + +export interface YieldExpression extends BaseNode { + type: "YieldExpression"; + argument: Expression | null; + delegate: boolean; +} + +export interface ThisExpression extends BaseNode { + type: "ThisExpression"; +} + +export interface Super extends BaseNode { + type: "Super"; +} + +export interface MetaProperty extends BaseNode { + type: "MetaProperty"; + meta: Identifier; + property: Identifier; +} + +// --- patterns --------------------------------------------------------------- + +export interface ObjectPattern extends BaseNode { + type: "ObjectPattern"; + properties: Property[]; +} + +export interface ArrayPattern extends BaseNode { + type: "ArrayPattern"; + elements: (Pattern | null)[]; +} + +export interface RestElement extends BaseNode { + type: "RestElement"; + argument: Pattern; +} + +export interface AssignmentPattern extends BaseNode { + type: "AssignmentPattern"; + left: Pattern; + right: Expression; +} + +// --- statements ------------------------------------------------------------- + +export interface Program extends BaseNode { + type: "Program"; + body: Statement[]; + sourceType?: "script" | "module"; +} + +export interface ExpressionStatement extends BaseNode { + type: "ExpressionStatement"; + expression: Expression; +} + +export interface BlockStatement extends BaseNode { + type: "BlockStatement"; + body: Statement[]; +} + +export interface EmptyStatement extends BaseNode { + type: "EmptyStatement"; +} + +export interface DebuggerStatement extends BaseNode { + type: "DebuggerStatement"; +} + +export interface WithStatement extends BaseNode { + type: "WithStatement"; + object: Expression; + body: Statement; +} + +export interface ReturnStatement extends BaseNode { + type: "ReturnStatement"; + argument: Expression | null; +} + +export interface LabeledStatement extends BaseNode { + type: "LabeledStatement"; + label: Identifier; + body: Statement; +} + +export interface BreakStatement extends BaseNode { + type: "BreakStatement"; + label: Identifier | null; +} + +export interface ContinueStatement extends BaseNode { + type: "ContinueStatement"; + label: Identifier | null; +} + +export interface IfStatement extends BaseNode { + type: "IfStatement"; + test: Expression; + consequent: Statement; + alternate: Statement | null; +} + +export interface SwitchStatement extends BaseNode { + type: "SwitchStatement"; + discriminant: Expression; + cases: SwitchCase[]; +} + +export interface SwitchCase extends BaseNode { + type: "SwitchCase"; + test: Expression | null; + consequent: Statement[]; +} + +export interface ThrowStatement extends BaseNode { + type: "ThrowStatement"; + argument: Expression; +} + +export interface TryStatement extends BaseNode { + type: "TryStatement"; + block: BlockStatement; + handlers: CatchClause[]; + guardedHandlers: CatchClause[]; + finalizer: BlockStatement | null; +} + +export interface CatchClause extends BaseNode { + type: "CatchClause"; + param: Pattern; + guard: Expression | null; + body: BlockStatement; +} + +export interface WhileStatement extends BaseNode { + type: "WhileStatement"; + test: Expression; + body: Statement; +} + +export interface DoWhileStatement extends BaseNode { + type: "DoWhileStatement"; + body: Statement; + test: Expression; +} + +export interface ForStatement extends BaseNode { + type: "ForStatement"; + init: VariableDeclaration | Expression | null; + test: Expression | null; + update: Expression | null; + body: Statement; +} + +export interface ForInStatement extends BaseNode { + type: "ForInStatement"; + left: VariableDeclaration | Pattern; + right: Expression; + body: Statement; +} + +export interface ForOfStatement extends BaseNode { + type: "ForOfStatement"; + left: VariableDeclaration | Pattern; + right: Expression; + body: Statement; +} + +export interface VariableDeclaration extends BaseNode { + type: "VariableDeclaration"; + kind: "var" | "let" | "const"; + declarations: VariableDeclarator[]; +} + +export interface VariableDeclarator extends BaseNode { + type: "VariableDeclarator"; + id: Pattern; + init: Expression | null | undefined; +} + +// --- classes ---------------------------------------------------------------- + +export interface ClassBase extends BaseNode { + id: Identifier | null; + superClass: Expression | null; + body: ClassBody; +} + +export interface ClassDeclaration extends ClassBase { + type: "ClassDeclaration"; + id: Identifier; +} + +export interface ClassExpression extends ClassBase { + type: "ClassExpression"; +} + +export interface ClassBody extends BaseNode { + type: "ClassBody"; + body: MethodDefinition[]; +} + +export interface MethodDefinition extends BaseNode { + type: "MethodDefinition"; + key: Expression; + value: FunctionExpression; + kind: "init" | "constructor" | "method" | "get" | "set"; + computed?: boolean; + static?: boolean; +} + +// --- modules ---------------------------------------------------------------- + +export interface ModuleSpecifierBase extends BaseNode { + local: Identifier; +} + +export interface ImportSpecifier extends ModuleSpecifierBase { + type: "ImportSpecifier"; + imported: Identifier; + // legacy alias some paths still consult + id?: Identifier; +} + +export interface ImportDefaultSpecifier extends ModuleSpecifierBase { + type: "ImportDefaultSpecifier"; + id?: Identifier; +} + +export interface ImportNamespaceSpecifier extends ModuleSpecifierBase { + type: "ImportNamespaceSpecifier"; + id?: Identifier; +} + +export interface ImportDeclaration extends BaseNode { + type: "ImportDeclaration"; + specifiers: (ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier)[]; + source: Literal; + // added by gather-imports: the resolved module path literal + source_path?: Literal & { value: string }; +} + +export interface ExportSpecifier extends BaseNode { + type: "ExportSpecifier"; + local: Identifier; + exported: Identifier; +} + +export interface ExportNamedDeclaration extends BaseNode { + type: "ExportNamedDeclaration"; + declaration: Statement | null; + specifiers: ExportSpecifier[]; + source: Literal | null; + source_path?: Literal & { value: string }; +} + +export interface ExportDefaultDeclaration extends BaseNode { + type: "ExportDefaultDeclaration"; + declaration: Expression | FunctionDeclaration | VariableDeclaration; +} + +export interface ExportAllDeclaration extends BaseNode { + type: "ExportAllDeclaration"; + source: Literal; + source_path?: Literal & { value: string }; +} + +// --- unions ----------------------------------------------------------------- + +export type Function = FunctionDeclaration | FunctionExpression | ArrowFunctionExpression; + +export type Class = ClassDeclaration | ClassExpression; + +export type ModuleDeclarationNode = + | ImportDeclaration + | ExportNamedDeclaration + | ExportDefaultDeclaration + | ExportAllDeclaration; + +export type Pattern = + | Identifier + | ObjectPattern + | ArrayPattern + | RestElement + | AssignmentPattern + | MemberExpression; // assignment-position targets + +export type Expression = + | ArrayExpression + | ObjectExpression + | Identifier + | Literal + | TemplateLiteral + | TaggedTemplateExpression + | FunctionExpression + | ArrowFunctionExpression + | UnaryExpression + | UpdateExpression + | BinaryExpression + | AssignmentExpression + | LogicalExpression + | MemberExpression + | ConditionalExpression + | CallExpression + | NewExpression + | SequenceExpression + | SpreadElement + | YieldExpression + | ThisExpression + | Super + | MetaProperty + | ClassExpression + | ObjectPattern + | ArrayPattern; + +export type Statement = + | ExpressionStatement + | BlockStatement + | EmptyStatement + | DebuggerStatement + | WithStatement + | ReturnStatement + | LabeledStatement + | BreakStatement + | ContinueStatement + | IfStatement + | SwitchStatement + | ThrowStatement + | TryStatement + | WhileStatement + | DoWhileStatement + | ForStatement + | ForInStatement + | ForOfStatement + | VariableDeclaration + | FunctionDeclaration + | ClassDeclaration + | ModuleDeclarationNode; + +export type Node = + | Program + | Statement + | Expression + | Pattern + | Property + | SwitchCase + | CatchClause + | VariableDeclarator + | TemplateElement + | ClassBody + | MethodDefinition + | ImportSpecifier + | ImportDefaultSpecifier + | ImportNamespaceSpecifier + | ExportSpecifier; + +export type NodeType = Node["type"]; diff --git a/lib/llvm.d.ts b/lib/llvm.d.ts new file mode 100644 index 00000000..69370aaa --- /dev/null +++ b/lib/llvm.d.ts @@ -0,0 +1,255 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Ambient declarations for the "@llvm" native module (node-llvm when +// node-hosted, ejs-llvm when self-hosted). The surface here is exactly +// what the compiler uses — extend it as needs grow; do NOT widen types +// to any. +// +// The compiler also hangs bookkeeping properties off llvm objects +// (is_constant on constants, entry_bb/literalAllocas/topScope on +// functions, ...). Those are declared here, optional, so the habit is +// visible and type-checked rather than smuggled. + +declare module "@llvm" { + // --- values -------------------------------------------------------------- + + interface Value { + setName(name: string): void; + dump(): void; + // compiler bookkeeping: constant tracking (see consts.ts) + is_constant?: boolean; + constant_val?: string | number | boolean | number[] | null; + } + + interface Constant extends Value {} + + const Constant: { + getNull(type: Type): Constant; + getAggregateZero(type: Type): Constant; + getIntegerValue(type: Type, ...val: number[]): Constant; + }; + + const ConstantFP: { + getDouble(val: number): Constant; + }; + + const ConstantArray: { + get(type: Type, elements: Constant[]): Constant; + }; + + // --- types --------------------------------------------------------------- + + interface Type { + pointerTo(): Type; + } + + interface StructType extends Type { + setStructBody(elements: Type[]): void; + } + + interface FunctionType extends Type {} + + const Type: { + getInt1Ty(): Type; + getInt8Ty(): Type; + getInt16Ty(): Type; + getInt32Ty(): Type; + getInt64Ty(): Type; + getDoubleTy(): Type; + getVoidTy(): Type; + }; + + const StructType: { + create(name: string, elements: Type[]): StructType; + }; + + const FunctionType: { + get(ret: Type, params: Type[]): FunctionType; + }; + + const ArrayType: { + get(elem: Type, count: number): Type; + }; + + // --- functions / globals / blocks ----------------------------------------- + + interface Argument extends Value {} + + interface EjsFunction extends Value { + args: Argument[]; + argSize: number; + type: FunctionType; + returnType: Type; + setInternalLinkage(): void; + setExternalLinkage(): void; + setDoesNotThrow(): void; + setDoesNotAccessMemory(): void; + setOnlyReadsMemory(): void; + setStructRet(): void; + hasStructRetAttr(): boolean; + setGC(name: string): void; + setPersonality(fn: EjsFunction): void; + // compiler bookkeeping + doesNotThrow?: boolean; + onlyReadsMemory?: boolean; + returns_ejsval_bool?: boolean; + } + + interface BasicBlock { + parent: EjsFunction; + } + const BasicBlock: { + new (name: string, parent: EjsFunction): BasicBlock; + }; + + interface GlobalVariable extends Value { + setInitializer(init: Constant): void; + setAlignment(align: number): void; + } + const GlobalVariable: { + new ( + module: Module, + type: Type, + name: string, + init: Constant | null, + visible?: boolean + ): GlobalVariable; + }; + + interface Module { + setTriple(triple: string): void; + setDataLayout(layout: string): void; + getOrInsertFunction(name: string, ret: Type, params: Type[]): EjsFunction; + getOrInsertExternalFunction(name: string, ret: Type, params: Type[]): EjsFunction; + getOrInsertGlobal(name: string, type: Type): GlobalVariable; + getOrInsertIntrinsic(name: string, types?: Type[]): EjsFunction; + getFunction(name: string): EjsFunction | null; + writeToFile(path: string): void; + writeBitcodeToFile(path: string): void; + dump(): void; + toString(): string; + } + const Module: { + new (name: string): Module; + }; + + // --- instruction building -------------------------------------------------- + + interface CallInst extends Value { + setOnlyReadsMemory(): void; + setDoesNotAccessMemory(): void; + setDoesNotThrow(): void; + setStructRet(): void; + } + + interface InvokeInst extends CallInst {} + + interface LandingPad extends Value { + setCleanup(cleanup: boolean): void; + addClause(clause: Value): void; + } + + interface PhiNode extends Value { + addIncoming(value: Value, block: BasicBlock): void; + } + + interface AllocaInst extends Value { + setAlignment(align: number): void; + } + + interface Switch extends Value { + addCase(val: Constant, dest: BasicBlock): void; + } + + const IRBuilder: { + setInsertPoint(bb: BasicBlock | null): void; + setInsertPointStartBB(bb: BasicBlock): void; + getInsertBlock(): BasicBlock | null; + setCurrentDebugLocation(loc: DebugLoc): void; + getCurrentDebugLocation(): DebugLoc; + + createAlloca(type: Type, name: string): AllocaInst; + createBitCast(value: Value, type: Type, name: string): Value; + createBr(bb: BasicBlock): Value; + createCondBr(cond: Value, then_bb: BasicBlock, else_bb: BasicBlock): Value; + createCall(fnType: FunctionType, callee: Value, args: Value[], name: string): CallInst; + createInvoke( + fnType: FunctionType, + callee: Value, + args: Value[], + normal: BasicBlock, + unwind: BasicBlock, + name: string + ): InvokeInst; + createExtractValue(agg: Value, idx: number, name: string): Value; + createGetElementPointer(type: Type, ptr: Value, idxs: Value[], name: string): Value; + createInBoundsGetElementPointer( + type: Type, + ptr: Value, + idxs: Value[], + name: string + ): Value; + createGlobalStringPtr(value: string, name: string): Constant; + createICmpEq(l: Value, r: Value, name: string): Value; + createICmpSGt(l: Value, r: Value, name: string): Value; + createICmpUGt(l: Value, r: Value, name: string): Value; + createICmpULt(l: Value, r: Value, name: string): Value; + createLandingPad(type: Type, personality: Value, numClauses: number, name: string): LandingPad; + createLoad(type: Type, ptr: Value, name: string): Value; + createNswSub(l: Value, r: Value, name: string): Value; + createOr(l: Value, r: Value, name: string): Value; + createPhi(type: Type, count: number, name: string): PhiNode; + createPointerCast(value: Value, type: Type, name: string): Value; + createPtrToInt(value: Value, type: Type, name: string): Value; + createRet(value: Value): Value; + createRetVoid(): Value; + createSelect(cond: Value, t: Value, f: Value, name: string): Value; + createStore(value: Value, ptr: Value, name?: string): Value; + createSwitch(value: Value, dflt: BasicBlock, numCases: number): Switch; + createTrunc(value: Value, type: Type, name: string): Value; + createUnreachable(): Value; + createZExt(value: Value, type: Type, name: string): Value; + }; + + // --- debug info ------------------------------------------------------------- + + interface DebugLoc {} + const DebugLoc: { + get(line: number, column: number, scope: DIDescriptor): DebugLoc; + }; + + interface DIDescriptor {} + interface DIFile extends DIDescriptor {} + interface DISubprogram extends DIDescriptor {} + + interface DIBuilder { + createFile(filename: string, directory: string): DIFile; + createCompileUnit( + filename: string, + directory: string, + producer: string, + optimized: boolean, + flags: string, + runtimeVersion: number + ): DIDescriptor; + createFunction( + scope: DIDescriptor, + name: string, + displayName: string, + file: DIFile, + lineNo: number, + isLocalToUnit: boolean, + isDefinition: boolean, + scopeLine: number, + flags: number, + isOptimized: boolean, + fn: EjsFunction + ): DISubprogram; + finalize(): void; + } + const DIBuilder: { + new (module: Module): DIBuilder; + }; +} diff --git a/lib/node-compat.d.ts b/lib/node-compat.d.ts new file mode 100644 index 00000000..67f44ecd --- /dev/null +++ b/lib/node-compat.d.ts @@ -0,0 +1,24 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// The "@node-compat/*" modules resolve to node's own os/path/fs/... when +// node-hosted (the babel step rewrites the specifier) and to the +// node-compat native module when self-hosted. Their surface is node's. + +declare module "@node-compat/os" { + const os: typeof import("os"); + export = os; +} +declare module "@node-compat/path" { + const path: typeof import("path"); + export = path; +} +declare module "@node-compat/fs" { + const fs: typeof import("fs"); + export = fs; +} +declare module "@node-compat/child_process" { + const child_process: typeof import("child_process"); + export = child_process; +} From 1fa6f675ad443a22fe34667b38a4464b211650af Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 12:28:12 -0700 Subject: [PATCH 053/146] =?UTF-8?q?ts:=20the=20EIR=20core=20=E2=80=94=20op?= =?UTF-8?q?s,=20intrinsics,=20errors,=20ir,=20builder,=20printer,=20verifi?= =?UTF-8?q?er?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The effect table becomes `as const satisfies Record`, yielding an OpName literal union that the intrinsics table's op entries typecheck against (OpIntrinsic | RuntimeIntrinsic discriminated union). ir.ts types the immediate payloads (ImmValue), control-flow targets and blockparam bookkeeping as declared class fields; builder/printer/ verifier follow mechanically (printer's output format is preserved exactly — the unit tests string-match it). isLowerNotSupported is a proper type guard over the exception boundary. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/.compiler.js.swp | Bin 16384 -> 0 bytes lib/eir/{builder.js => builder.ts} | 164 +++++++++---------- lib/eir/errors.js | 25 --- lib/eir/errors.ts | 36 +++++ lib/eir/intrinsics.js | 55 ------- lib/eir/intrinsics.ts | 67 ++++++++ lib/eir/ir.js | 180 --------------------- lib/eir/ir.ts | 230 +++++++++++++++++++++++++++ lib/eir/{ops.js => ops.ts} | 46 ++++-- lib/eir/printer.js | 104 ------------ lib/eir/printer.ts | 103 ++++++++++++ lib/eir/{verifier.js => verifier.ts} | 111 +++++++------ lib/estree.ts | 7 +- 13 files changed, 613 insertions(+), 515 deletions(-) delete mode 100644 lib/.compiler.js.swp rename lib/eir/{builder.js => builder.ts} (57%) delete mode 100644 lib/eir/errors.js create mode 100644 lib/eir/errors.ts delete mode 100644 lib/eir/intrinsics.js create mode 100644 lib/eir/intrinsics.ts delete mode 100644 lib/eir/ir.js create mode 100644 lib/eir/ir.ts rename lib/eir/{ops.js => ops.ts} (88%) delete mode 100644 lib/eir/printer.js create mode 100644 lib/eir/printer.ts rename lib/eir/{verifier.js => verifier.ts} (64%) diff --git a/lib/.compiler.js.swp b/lib/.compiler.js.swp deleted file mode 100644 index 073e95a400d675753241917a7bab8c1c1681d59d..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 16384 zcmeHOTZ|k>73~o0@W{gN>fbQ+t||Yp=^*XrbyMFl^`luMF7^oPi7^oPi7^oPi7^oPi7^oPi7^oQdzhuDiE$eoS z{8b91@%?`q|37t;WhFo#5WpGWH1IKC5AdfOE$e5%*MLWWhk<2a3b28jfj{10Sw8?i z2YeQYfd_zjU=FAQ&tGp@Uj-fpJYXI;0PF&O`EJX47WfkIMIZpWzz2ZafPcKpvc3;| z1Nb`N0Ph2S{Z7kz0=Ne_155%n;1}<(tWN_zumH>ghk--D&A^YYgDt=%;5={)H~`!V zyty0W0bT+w1CIj_0hfS}0Ds$MS$_py1D*j+0LK9a{Qd2g^-bUz;Ax--G=W**M&K(* zUR(rX-~r$`Fby09ZUf#ATnoH_oW_#?h2e#seYYw(=fr{IhP(y>%xiKcyQGp4 zRYBAiwhTqmiUz$Mh#Jcyr&q9iL@Nyp=Fx|=J3LubYA{l zHpw=%4(OpPEvAXqkB@40WG;Rkq?mlmtDFU)^-- z?7Sx;nMhkEaS(NCL0o71d=YWB9wc36Ok}~3jr%5-A+>LKG`?s?GVuA_9DdESR*QKu zh$D=l&cM&?F;GMUr`NVanTzvgh2f}yl+>pT<=QQ!+q@N8r^RZ$o#gJIvmiX0+}go9 z!{7E(p@eCICx>){dC8OcK^((~RH2$Xy*Q}Dpv`JZvFOvJO53N7C-dnHdBQS^iaTP? zk%6ZvoX`RjSF`b>gUF*E3Iit9DLvb1R`okooLjv;SE(IDO*6u}j+}5Ih}N7AFRn~% z5YoZg#%zXb5rrF!U%+O;kHA9iGj~G^={>tovPASl2!y#I#BpKBbW5*)Z=a>)3U5g~ zD4Yms#lid(yGqgcwrwYrJ5#C5^>MU>W8`VewNjp1!v|Mt(@tcz?PPnhvV~7)AszmH z;0}V&$FJ@5d6Lfdf3V<7vvq#iN(Vuo`oyJkY?%0~4RCw=Q}a^u^+KXOe>%n?#p5KE z$Ok~XX0$hGSZUFjX`UZSLLZeab2iG>-c4l+O(RXy)=J^nRyC%vlZc))J95$K)4s?^ zP;%6f+~~O?B(e0E)|B6?%hld$J07oTr3G3u75XtdszN_(enX7rMd3 zWWFjD%T(72QehgXaR6v7kDUE6_eAU~uSrho4b|b%k}7TbXe<*aPVVLryn#f-qw6B@ zA-@ATeUv~@U*uy~MrWH?378FCk|Du-t+xe4%SELYIIdaNC9@BxNpR7<9rP_4Ip+3DVN$4p?y}r=3%HxR#9&xS9>sfm&M%7b2HKfqbZNta{_d4yi*NXZr!&Mh{V&IK|+ceG6Cpy@jD^g7MxX?K--iH+YtCxXsE zTi2Y41)RrZ0|$gUmtu&j_1IjR(+4qXf?i+53EO0+noFnPkm8}swpcqBJvL!a@gSZe zH+5nr7xV<4uU-QAv*w9fYJerpJ6MFg*y>(*m?!3%1yKpdqyburQo|CuGVghKg%?!O z54#(KBnWd|`+R5yyoVKR+v&Q}g!(QamY*ikf!PCr#o7YGjS2nQBQ5*%~ z48wh6J@Aw6G&?dwk_{s$+HG`^mAd4JHVTDMZ&CdJIAYY_BZj5;KmGpvGGhGafyaPH zfqCG)z|RraQ`}E6KL@TLhJP0L4)7RoKk#vY0k0v3e*yRj@HFrg@F=hjTmY7V2Jl3!vP%gl3arp{Ry($JO1}X+B2L9^|=tP}PzhthX3MwvWN6yYOfJmXWEf4BBT`h_aJ(pWlJ%`5MlwC6EKlinG`lk1Zb8L!+V$w{4-FaskrYM36Ob%x{F~2tDB>GP5 z^rYQG&Z4HSRYF%?*(ww!cX)hLy@$qqV_+hXF{3Z82O^Nn7?*b%%L=Ga&bgg9Yh1P{ za!3%;>qO5;3(D6}i=r_)NK~0h2bomFP=zf^fg-XqPUNc^y+89K0M$_-yId+_l@6Y1 zMeGIHngD(Ip(hYxb92fxr02BTBJ`1qXX~-kM;NG=eE!`*HjjpsdHtWT_aR?c zEA26M0HNTjM4}fFCY?#Pw~lWL>TCkjO6gzP5^Mrjhtt!C2-nMR+@eBgyTd*Tiz+i1 z8nbVHPBu*>JDkX(g<3k@HZ=isGHAo}1nGMd8Je?EuN-@5I!C8h&5aR7#BLK&Gv2% zwc1)SOpukP1|5#36u=C}qADq@8%oS0WF)JU z^xXmN9QFM{Kj`x?h!EsDDfvkk+t+iVea2prcVMvkzj3{$$W#oX6swyN=sC=0sXPL+ zN^^Tt6C@&aZ2B&ue|86gYb+{CDKb6l=>SschSQ0JOi*v~0+JHH%;jwnb4u-`6vM#) qsmv8gcgT1sN6Mj (block -> value) + defs = new Map>(); + cur!: Block; + // stack of catch blocks; when non-empty, may-throw instructions get + // explicit normal/unwind edges (invoke style) + handlers: Block[] = []; + + constructor(name: string, paramNames: string[]) { this.fn = new Func(name, paramNames); - // varname -> (block -> value) - this.defs = new Map(); - this.cur = null; - // stack of catch blocks; when non-empty, may-throw instructions get - // explicit normal/unwind edges (invoke style) - this.handlers = []; - - let entry = this.newBlock("entry"); + + const entry = this.newBlock("entry"); this.setInsertPoint(entry); // function parameters are the entry block's parameters - for (let pname of this.fn.paramNames) { - let p = entry.addParam(pname); + for (const pname of this.fn.paramNames) { + const p = entry.addParam(pname); this.writeVariable(pname, entry, p); } this.sealBlock(entry); } - newBlock(name) { + newBlock(name?: string): Block { return this.fn.addBlock(new Block(this.fn, name)); } - setInsertPoint(block) { + setInsertPoint(block: Block): void { this.cur = block; } // --- instruction emission ------------------------------------------------ - emit(op, operands, imms) { - if (this.cur.terminated) throw new Error(`emitting '${op}' into terminated block ${this.cur.name}`); - let inst = new Inst(this.fn, op, operands, imms); + emit(op: string, operands: Inst[], imms: Imms): Inst { + if (this.cur.terminated) + throw new Error(`emitting '${op}' into terminated block ${this.cur.name}`); + const inst = new Inst(this.fn, op, operands, imms); inst.block = this.cur; this.cur.insts.push(inst); // inside a protected region, a may-throw instruction terminates its // block with an explicit normal/unwind pair, and insertion continues // in the normal successor. - let info = opInfo(op); + const info = opInfo(op); if (this.handlers.length > 0 && (info.effects & Effect.THROW) !== 0 && !info.terminator) { - let handler = this.handlers[this.handlers.length - 1]; - let cont = this.newBlock("cont"); + const handler = this.handlers[this.handlers.length - 1]!; + const cont = this.newBlock("cont"); inst.addTarget(cont, [], "normal"); inst.addTarget(handler, [], "unwind"); this.sealBlock(cont); @@ -72,68 +71,68 @@ export class FunctionBuilder { // --- exception handling ----------------------------------------------------- - newCatchBlock(name) { - let block = this.newBlock(name || "catch"); + newCatchBlock(name?: string): Block { + const block = this.newBlock(name || "catch"); block.isCatch = true; - let exc = block.addParam("%exception"); + const exc = block.addParam("%exception"); exc.isException = true; exc.type = "exception"; return block; } - pushHandler(catchBlock) { + pushHandler(catchBlock: Block): void { this.handlers.push(catchBlock); } - popHandler() { + popHandler(): Block | undefined { return this.handlers.pop(); } // a `throw` statement: unwinds to the active handler if there is one, // otherwise out of the function. - throwValue(v) { - let inst = this.emit("throw", [v], {}); + throwValue(v: Inst): Inst { + const inst = this.emit("throw", [v], {}); if (this.handlers.length > 0) - inst.addTarget(this.handlers[this.handlers.length - 1], [], "unwind"); + inst.addTarget(this.handlers[this.handlers.length - 1]!, [], "unwind"); return inst; } - constNumber(v) { + constNumber(v: number): Inst { return this.emit("const", [], { kind: "number", value: v }); } - constAtom(s) { + constAtom(s: string): Inst { return this.emit("const", [], { kind: "atom", value: s }); } - constBool(v) { + constBool(v: boolean): Inst { return this.emit("const", [], { kind: "boolean", value: v }); } - constUndefined() { + constUndefined(): Inst { return this.emit("const", [], { kind: "undefined" }); } - constNull() { + constNull(): Inst { return this.emit("const", [], { kind: "null" }); } - br(block, args) { - let inst = this.emit("br", [], {}); + br(block: Block, args?: Inst[]): Inst { + const inst = this.emit("br", [], {}); inst.addTarget(block, args || []); return inst; } - condBr(cond, tblock, targs, fblock, fargs) { - let inst = this.emit("cond_br", [cond], {}); + condBr(cond: Inst, tblock: Block, targs: Inst[], fblock: Block, fargs: Inst[]): Inst { + const inst = this.emit("cond_br", [cond], {}); inst.addTarget(tblock, targs || []); inst.addTarget(fblock, fargs || []); return inst; } - ret(value) { + ret(value: Inst): Inst { return this.emit("return", [value], {}); } // --- Braun SSA ------------------------------------------------------------- - writeVariable(name, block, value) { + writeVariable(name: string, block: Block, value: Inst): void { let m = this.defs.get(name); if (!m) { m = new Map(); @@ -142,31 +141,32 @@ export class FunctionBuilder { m.set(block, value); } - hasVariable(name) { + hasVariable(name: string): boolean { return this.defs.has(name); } - readVariable(name, block) { - let m = this.defs.get(name); - if (m && m.has(block)) return m.get(block); + readVariable(name: string, block: Block): Inst { + const m = this.defs.get(name); + const v = m && m.get(block); + if (v) return v; return this.readVariableRecursive(name, block); } - readVariableRecursive(name, block) { - let val; + readVariableRecursive(name: string, block: Block): Inst { + let val: Inst; if (!block.sealed) { // incomplete CFG: leave a parameter to be filled at seal time - let param = block.addParam(name); + const param = block.addParam(name); block.incompleteParams.set(name, param); val = param; } else if (block.predEdges.length === 1) { - val = this.readVariable(name, block.predEdges[0].inst.block); + val = this.readVariable(name, block.predEdges[0]!.inst.block!); } else if (block.predEdges.length === 0) { if (block !== this.fn.entry) { // an unreachable block (code after `while (true)`, after a // switch whose every case returns, ...): any value will do. // the emitter drops unreachable blocks entirely. - let c = new Inst(this.fn, "const", [], { kind: "undefined" }); + const c = new Inst(this.fn, "const", [], { kind: "undefined" }); c.block = block; block.insts.unshift(c); val = c; @@ -175,7 +175,7 @@ export class FunctionBuilder { } } else { // break potential cycles with a parameter before recursing - let param = block.addParam(name); + const param = block.addParam(name); this.writeVariable(name, block, param); val = this.addParamOperands(name, param); } @@ -183,60 +183,60 @@ export class FunctionBuilder { return val; } - addParamOperands(name, param) { - let block = param.block; - let argIdx = block.argIndexOfParam(param); - for (let e of block.predEdges) { - let predBlock = e.inst.block; - let v = this.readVariable(name, predBlock); - e.inst.targets[e.targetIndex].args[argIdx] = v; + addParamOperands(name: string, param: Inst): Inst { + const block = param.block!; + const argIdx = block.argIndexOfParam(param); + for (const e of block.predEdges) { + const predBlock = e.inst.block!; + const v = this.readVariable(name, predBlock); + e.inst.targets![e.targetIndex]!.args[argIdx] = v; } return this.tryRemoveTrivialParam(param); } - tryRemoveTrivialParam(param) { + tryRemoveTrivialParam(param: Inst): Inst { if (param.isException) return param; // produced by unwinding, never trivial - let block = param.block; - let argIdx = block.argIndexOfParam(param); - let same = null; - for (let e of block.predEdges) { - let arg = e.inst.targets[e.targetIndex].args[argIdx]; + const block = param.block!; + const argIdx = block.argIndexOfParam(param); + let same: Inst | null = null; + for (const e of block.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; if (arg === same || arg === param) continue; if (same !== null) return param; // merges at least two distinct values: keep it - same = arg; + same = arg ?? null; } // unreachable block or self-reference only if (same === null) return param; // collect users before rewriting so we can recheck dependent params - let users = usersOf(this.fn, param).filter((u) => u !== param); + const users = usersOf(this.fn, param).filter((u) => u !== param); replaceAllUses(this.fn, param, same); // fix stale variable definitions that still point at the removed param - for (let m of this.defs.values()) { - for (let entry of m.entries()) { + for (const m of this.defs.values()) { + for (const entry of m.entries()) { if (entry[1] === param) m.set(entry[0], same); } } block.removeParam(param); - for (let u of users) { + for (const u of users) { if (u.op === "blockparam" && !u.removed) this.tryRemoveTrivialParam(u); } return same; } - sealBlock(block) { + sealBlock(block: Block): void { if (block.sealed) throw new Error(`sealing already-sealed block ${block.name}`); block.sealed = true; - for (let entry of block.incompleteParams.entries()) { + for (const entry of block.incompleteParams.entries()) { this.addParamOperands(entry[0], entry[1]); } block.incompleteParams.clear(); } - finish() { - for (let b of this.fn.blocks) { + finish(): Func { + for (const b of this.fn.blocks) { if (!b.sealed) throw new Error(`EIR: ${this.fn.name}: block ${b.name} never sealed`); } return this.fn; diff --git a/lib/eir/errors.js b/lib/eir/errors.js deleted file mode 100644 index a4e73167..00000000 --- a/lib/eir/errors.js +++ /dev/null @@ -1,25 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// thrown by scope analysis / lowering when a construct is outside the -// currently-supported subset; callers catch it and fall back to the legacy -// code path for that function. -// -// deliberately NOT a class: constructing an imported subclass of Error -// trips an IsConstructor assert when the compiler itself is compiled by -// the legacy pipeline (a latent legacy bug, still to be tracked down), so -// the fallback signal is a plain Error with a marker property, tested via -// isLowerNotSupported(). - -export function LowerNotSupported(what, loc) { - let locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; - let e = new Error(`EIR lowering does not support ${what}${locstr}`); - e.eir_lower_not_supported = true; - e.what = what; - return e; -} - -export function isLowerNotSupported(e) { - return e && e.eir_lower_not_supported === true; -} diff --git a/lib/eir/errors.ts b/lib/eir/errors.ts new file mode 100644 index 00000000..1ab8a832 --- /dev/null +++ b/lib/eir/errors.ts @@ -0,0 +1,36 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// thrown by scope analysis / lowering when a construct is outside the +// supported subset; compile() reports it as a compile error. +// +// deliberately NOT an Error subclass: this shape predates the legacy +// pipeline's removal (subclassing Error miscompiled there) and is now +// simply the stable, structurally-testable form of the signal. + +import type { SourceLocation } from "../estree"; + +export interface LowerNotSupportedError extends Error { + eir_lower_not_supported: true; + what: string; +} + +export function LowerNotSupported( + what: string, + loc?: SourceLocation | null +): LowerNotSupportedError { + const locstr = loc && loc.start ? ` at ${loc.start.line}:${loc.start.column}` : ""; + const e = new Error(`EIR lowering does not support ${what}${locstr}`) as LowerNotSupportedError; + e.eir_lower_not_supported = true; + e.what = what; + return e; +} + +export function isLowerNotSupported(e: unknown): e is LowerNotSupportedError { + return ( + typeof e === "object" && + e !== null && + (e as { eir_lower_not_supported?: boolean }).eir_lower_not_supported === true + ); +} diff --git a/lib/eir/intrinsics.js b/lib/eir/intrinsics.js deleted file mode 100644 index 6683caef..00000000 --- a/lib/eir/intrinsics.js +++ /dev/null @@ -1,55 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// The %-intrinsic calls EIR knows how to lower, keyed by callee name. -// Pre-EIR desugar passes (see preEIRConvert in desugar.js) -// rewrite constructs lowering has no native form for into calls of these -// intrinsics, which both pipelines then understand: the legacy visitor -// through its ejs_intrinsics table, EIR through this one. -// -// An entry is either -// { op: "" } lower to that op, operands = the -// visited arguments -// { runtime: "" } lower to call_runtime imms.name (the -// runtime function must take plain ejsval -// arguments and return an ejsval) -// -// scopes.js consults this table to reject unknown intrinsics EARLY (a -// late LowerNotSupported abandons the whole file's EIR set), so keep it -// the single source of truth: never lower an intrinsic in lower.js that -// isn't listed here. - -// An entry may also set: -// void: true the runtime function returns void (the call is only -// valid as a statement; its EIR value reads as undefined) -// rebindThis: true the op's result becomes the function's `this` -// (super() in a derived constructor initializes it) -export const eir_intrinsics = { - "%arrayFromSpread": { op: "array_from_spread" }, - - // DesugarClasses - "%objectCreate": { runtime: "object_create" }, - "%setPrototypeOf": { runtime: "object_set_prototype_of" }, - "%setConstructorKindBase": { runtime: "set_constructor_kind_base", void: true }, - "%setConstructorKindDerived": { runtime: "set_constructor_kind_derived", void: true }, - "%constructSuper": { op: "construct_super", rebindThis: true }, - "%constructSuperApply": { op: "construct_super_apply", rebindThis: true }, - - // DesugarSpread (new Foo(...args)) - "%constructApply": { op: "construct_apply" }, - - // DesugarMetaProperties (new.target) - "%getNewTarget": { op: "new_target" }, - - // DesugarGeneratorFunctions: coroutine-style — the generator body is - // an ordinary closure run on its own stack (runtime ucontext switch), - // so both intrinsics are plain runtime calls - "%makeGenerator": { runtime: "make_generator" }, - "%generatorYield": { runtime: "generator_yield" }, - "%generatorIsReturnSentinel": { runtime: "generator_is_return_sentinel" }, - "%generatorReturnValue": { runtime: "generator_return_value" }, - - // DesugarDestructuring (array patterns iterate via a runtime wrapper) - "%createIteratorWrapper": { runtime: "iterator_wrapper_new" }, -}; diff --git a/lib/eir/intrinsics.ts b/lib/eir/intrinsics.ts new file mode 100644 index 00000000..73ef3d76 --- /dev/null +++ b/lib/eir/intrinsics.ts @@ -0,0 +1,67 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// The %-intrinsic calls EIR knows how to lower, keyed by callee name. +// Pre-EIR desugar passes (see preEIRConvert in desugar.js) rewrite +// constructs lowering has no native form for into calls of these +// intrinsics. +// +// scopes.ts consults this table to reject unknown intrinsics EARLY (a +// late LowerNotSupported is a compile error with less context), so keep +// it the single source of truth: never lower an intrinsic in lower.ts +// that isn't listed here. + +import type { OpName } from "./ops"; + +interface OpIntrinsic { + // lower to this op; operands = the visited arguments + op: OpName; + runtime?: undefined; + // the op's result becomes the function's `this` (super() in a + // derived constructor initializes it) + rebindThis?: boolean; + void?: undefined; +} + +interface RuntimeIntrinsic { + op?: undefined; + // lower to call_runtime imms.name; the runtime function must take + // plain ejsval arguments and return an ejsval + runtime: string; + rebindThis?: undefined; + // the runtime function returns void (the call is only valid as a + // statement; its EIR value reads as undefined) + void?: boolean; +} + +export type IntrinsicEntry = OpIntrinsic | RuntimeIntrinsic; + +export const eir_intrinsics: Record = { + "%arrayFromSpread": { op: "array_from_spread" }, + + // DesugarClasses + "%objectCreate": { runtime: "object_create" }, + "%setPrototypeOf": { runtime: "object_set_prototype_of" }, + "%setConstructorKindBase": { runtime: "set_constructor_kind_base", void: true }, + "%setConstructorKindDerived": { runtime: "set_constructor_kind_derived", void: true }, + "%constructSuper": { op: "construct_super", rebindThis: true }, + "%constructSuperApply": { op: "construct_super_apply", rebindThis: true }, + + // DesugarSpread (new Foo(...args)) + "%constructApply": { op: "construct_apply" }, + + // DesugarMetaProperties (new.target) + "%getNewTarget": { op: "new_target" }, + + // DesugarGeneratorFunctions: coroutine-style — the generator body is + // an ordinary closure run on its own stack (runtime ucontext switch), + // so these are plain runtime calls + "%makeGenerator": { runtime: "make_generator" }, + "%generatorYield": { runtime: "generator_yield" }, + "%generatorIsReturnSentinel": { runtime: "generator_is_return_sentinel" }, + "%generatorReturnValue": { runtime: "generator_return_value" }, + + // DesugarDestructuring (array patterns iterate via a runtime wrapper) + "%createIteratorWrapper": { runtime: "iterator_wrapper_new" }, +}; diff --git a/lib/eir/ir.js b/lib/eir/ir.js deleted file mode 100644 index e544048a..00000000 --- a/lib/eir/ir.js +++ /dev/null @@ -1,180 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// EIR core data structures: Module / Function / Block / Inst. -// SSA with basic block arguments (no phi nodes); block parameters are -// Insts with op "blockparam". See EIRProposal.md. - -import { opInfo, isTerminator } from "./ops"; - -export class Module { - constructor(name) { - this.name = name; - this.functions = []; - } - - addFunction(fn) { - this.functions.push(fn); - return fn; - } -} - -export class Func { - constructor(name, paramNames) { - this.name = name; - this.paramNames = paramNames || []; - this.blocks = []; - this.next_value_id = 0; - this.next_block_id = 0; - this.entry = null; - } - - newValueId() { - return this.next_value_id++; - } - - addBlock(block) { - this.blocks.push(block); - if (!this.entry) this.entry = block; - return block; - } - - // all instructions, params first per block, in block order. - forEachInst(cb) { - for (let b of this.blocks) { - for (let p of b.params) cb(p, b); - for (let i of b.insts) cb(i, b); - } - } -} - -export class Block { - constructor(fn, name) { - this.fn = fn; - // uniquify within the function so lowering can reuse friendly names - this.name = `${name || "bb"}${fn.next_block_id++}`; - this.params = []; - this.insts = []; - this.sealed = false; - // catch blocks are reached only by unwind edges; their first param - // is the caught exception, produced by the unwind machinery rather - // than passed as an edge argument. - this.isCatch = false; - // predecessor edges: { inst: , targetIndex: } - this.predEdges = []; - // Braun SSA construction state (owned by the builder) - this.incompleteParams = new Map(); // varname -> param Inst - } - - // edge args don't carry the exception param, so a param's position in - // an edge's args differs from its position in `params` on catch blocks. - argIndexOfParam(param) { - return param.paramIndex - (this.isCatch ? 1 : 0); - } - - get terminator() { - let last = this.insts[this.insts.length - 1]; - if (last && isTerminator(last)) return last; - return null; - } - - get terminated() { - return this.terminator !== null; - } - - preds() { - return this.predEdges.map((e) => e.inst.block); - } - - succs() { - let t = this.terminator; - if (!t || !t.targets) return []; - return t.targets.map((tgt) => tgt.block); - } - - addParam(nameHint) { - let p = new Inst(this.fn, "blockparam", [], {}); - p.block = this; - p.nameHint = nameHint; - p.paramIndex = this.params.length; - this.params.push(p); - // extend every known predecessor edge with a slot for this param. - // callers (the builder) fill the values in. - if (!p.isException) { - for (let e of this.predEdges) { - e.inst.targets[e.targetIndex].args.push(null); - } - } - return p; - } - - removeParam(param) { - let idx = param.paramIndex; - let argIdx = this.argIndexOfParam(param); - this.params.splice(idx, 1); - for (let i = idx; i < this.params.length; i++) this.params[i].paramIndex = i; - for (let e of this.predEdges) { - e.inst.targets[e.targetIndex].args.splice(argIdx, 1); - } - param.removed = true; - } -} - -export class Inst { - // operands: array of Inst (values); imms: object of immediates - constructor(fn, op, operands, imms) { - this.id = fn.newValueId(); - this.op = op; - this.operands = operands || []; - this.imms = imms || {}; - this.block = null; - this.type = "any"; - // control-flow targets for terminators / invokes: - // [{ block, args: [Inst], kind: "normal"|"unwind"|undefined }] - this.targets = null; - - let info = opInfo(op); - if (info.arity >= 0 && this.operands.length !== info.arity) - throw new Error( - `EIR: '${op}' expects ${info.arity} operands, got ${this.operands.length}` - ); - } - - addTarget(block, args, kind) { - if (!this.targets) this.targets = []; - let targetIndex = this.targets.length; - this.targets.push({ block: block, args: args || [], kind: kind }); - block.predEdges.push({ inst: this, targetIndex: targetIndex }); - } -} - -// replace every use of `from` (as an operand or edge argument) in fn with `to`. -export function replaceAllUses(fn, from, to) { - fn.forEachInst((inst) => { - for (let i = 0; i < inst.operands.length; i++) { - if (inst.operands[i] === from) inst.operands[i] = to; - } - if (inst.targets) { - for (let t of inst.targets) { - for (let i = 0; i < t.args.length; i++) { - if (t.args[i] === from) t.args[i] = to; - } - } - } - }); -} - -// collect the instructions that use `value` (operands or edge args). -export function usersOf(fn, value) { - let users = []; - fn.forEachInst((inst) => { - let uses = false; - for (let o of inst.operands) if (o === value) uses = true; - if (inst.targets) { - for (let t of inst.targets) for (let a of t.args) if (a === value) uses = true; - } - if (uses) users.push(inst); - }); - return users; -} diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts new file mode 100644 index 00000000..c94ce769 --- /dev/null +++ b/lib/eir/ir.ts @@ -0,0 +1,230 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// EIR core data structures: Module / Func / Block / Inst. +// SSA with basic block arguments (no phi nodes); block parameters are +// Insts with op "blockparam". See EIRProposal.md. + +import { opInfo, isTerminator } from "./ops"; + +// the immediate (non-value) attributes an instruction carries. values +// are op-specific: atoms and runtime-fn names are strings, env slots and +// array lengths are numbers, make_object keys / make_array indices are +// arrays, template_callsite carries string arrays, etc. +export type ImmValue = + | string + | number + | boolean + | null + | undefined + | readonly string[] + | readonly number[]; + +export type Imms = { [name: string]: ImmValue }; + +export type TargetKind = "normal" | "unwind" | undefined; + +export interface Target { + block: Block; + args: (Inst | null)[]; + kind: TargetKind; +} + +export interface PredEdge { + inst: Inst; + targetIndex: number; +} + +export class Module { + name: string; + functions: Func[] = []; + + constructor(name: string) { + this.name = name; + } + + addFunction(fn: Func): Func { + this.functions.push(fn); + return fn; + } +} + +export class Func { + name: string; + paramNames: string[]; + blocks: Block[] = []; + next_value_id = 0; + next_block_id = 0; + entry: Block | null = null; + + constructor(name: string, paramNames?: string[]) { + this.name = name; + this.paramNames = paramNames || []; + } + + newValueId(): number { + return this.next_value_id++; + } + + addBlock(block: Block): Block { + this.blocks.push(block); + if (!this.entry) this.entry = block; + return block; + } + + // all instructions, params first per block, in block order. + forEachInst(cb: (inst: Inst, block: Block) => void): void { + for (const b of this.blocks) { + for (const p of b.params) cb(p, b); + for (const i of b.insts) cb(i, b); + } + } +} + +export class Block { + fn: Func; + // uniquified within the function so lowering can reuse friendly names + name: string; + params: Inst[] = []; + insts: Inst[] = []; + sealed = false; + // catch blocks are reached only by unwind edges; their first param + // is the caught exception, produced by the unwind machinery rather + // than passed as an edge argument. + isCatch = false; + // predecessor edges + predEdges: PredEdge[] = []; + // Braun SSA construction state (owned by the builder): + // varname -> param Inst + incompleteParams = new Map(); + + constructor(fn: Func, name?: string) { + this.fn = fn; + this.name = `${name || "bb"}${fn.next_block_id++}`; + } + + // edge args don't carry the exception param, so a param's position in + // an edge's args differs from its position in `params` on catch blocks. + argIndexOfParam(param: Inst): number { + return param.paramIndex - (this.isCatch ? 1 : 0); + } + + get terminator(): Inst | null { + const last = this.insts[this.insts.length - 1]; + if (last && isTerminator(last)) return last; + return null; + } + + get terminated(): boolean { + return this.terminator !== null; + } + + preds(): Block[] { + return this.predEdges.map((e) => e.inst.block!); + } + + succs(): Block[] { + const t = this.terminator; + if (!t || !t.targets) return []; + return t.targets.map((tgt) => tgt.block); + } + + addParam(nameHint?: string): Inst { + const p = new Inst(this.fn, "blockparam", [], {}); + p.block = this; + p.nameHint = nameHint; + p.paramIndex = this.params.length; + this.params.push(p); + // extend every known predecessor edge with a slot for this param. + // callers (the builder) fill the values in. + if (!p.isException) { + for (const e of this.predEdges) { + e.inst.targets![e.targetIndex]!.args.push(null); + } + } + return p; + } + + removeParam(param: Inst): void { + const idx = param.paramIndex; + const argIdx = this.argIndexOfParam(param); + this.params.splice(idx, 1); + for (let i = idx; i < this.params.length; i++) this.params[i]!.paramIndex = i; + for (const e of this.predEdges) { + e.inst.targets![e.targetIndex]!.args.splice(argIdx, 1); + } + param.removed = true; + } +} + +export class Inst { + id: number; + op: string; + // operand values. slots are filled by construction and never null in + // a verified function; the builder's edge machinery temporarily holds + // nulls in Target.args only. + operands: Inst[]; + imms: Imms; + block: Block | null = null; + type = "any"; // the (future) type lattice; untyped for now + // control-flow targets for terminators / invokes + targets: Target[] | null = null; + + // --- blockparam bookkeeping ------------------------------------------------ + nameHint: string | undefined = undefined; + paramIndex = -1; + // catch blocks' first param is the caught exception + isException = false; + removed = false; + + constructor(fn: Func, op: string, operands?: Inst[], imms?: Imms) { + this.id = fn.newValueId(); + this.op = op; + this.operands = operands || []; + this.imms = imms || {}; + + const info = opInfo(op); + if (info.arity >= 0 && this.operands.length !== info.arity) + throw new Error( + `EIR: '${op}' expects ${info.arity} operands, got ${this.operands.length}` + ); + } + + addTarget(block: Block, args?: (Inst | null)[], kind?: TargetKind): void { + if (!this.targets) this.targets = []; + const targetIndex = this.targets.length; + this.targets.push({ block, args: args || [], kind }); + block.predEdges.push({ inst: this, targetIndex }); + } +} + +// replace every use of `from` (as an operand or edge argument) in fn with `to`. +export function replaceAllUses(fn: Func, from: Inst, to: Inst): void { + fn.forEachInst((inst) => { + for (let i = 0; i < inst.operands.length; i++) { + if (inst.operands[i] === from) inst.operands[i] = to; + } + if (inst.targets) { + for (const t of inst.targets) { + for (let i = 0; i < t.args.length; i++) { + if (t.args[i] === from) t.args[i] = to; + } + } + } + }); +} + +// collect the instructions that use `value` (operands or edge args). +export function usersOf(fn: Func, value: Inst): Inst[] { + const users: Inst[] = []; + fn.forEachInst((inst) => { + let uses = false; + for (const o of inst.operands) if (o === value) uses = true; + if (inst.targets) { + for (const t of inst.targets) for (const a of t.args) if (a === value) uses = true; + } + if (uses) users.push(inst); + }); + return users; +} diff --git a/lib/eir/ops.js b/lib/eir/ops.ts similarity index 88% rename from lib/eir/ops.js rename to lib/eir/ops.ts index 4c9a766a..33617074 100644 --- a/lib/eir/ops.js +++ b/lib/eir/ops.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ // The EIR opcode set and its effect table. See EIRProposal.md. @@ -16,7 +16,19 @@ export const Effect = { THROW: 1 << 2, // may throw GC: 1 << 3, // may allocate / trigger a collection CALL: 1 << 4, // may reenter arbitrary JS -}; +} as const; + +export interface OpInfo { + // fixed operand count, or -1 for variadic + arity: number; + effects: number; + // names of immediate (non-value) attributes the instruction carries + imms?: readonly string[]; + // ends a block unconditionally + terminator?: boolean; + // terminates its block when it carries explicit normal/unwind targets + may_terminate?: boolean; +} const E = Effect; @@ -173,15 +185,27 @@ export const OPS = { // block parameter (not written by user code; created by the builder) blockparam: { arity: 0, effects: E.NONE }, -}; +} as const satisfies Record; + +export type OpName = keyof typeof OPS; + +export function isOpName(op: string): op is OpName { + return Object.prototype.hasOwnProperty.call(OPS, op); +} + +export function opInfo(op: string): OpInfo { + if (!isOpName(op)) throw new Error(`unknown EIR opcode '${op}'`); + return OPS[op]; +} -export function opInfo(op) { - let info = OPS[op]; - if (!info) throw new Error(`unknown EIR opcode '${op}'`); - return info; +// the structural slice of Inst that terminator-ness depends on (ir.ts +// imports from here, so this module can't import Inst without a cycle) +export interface InstLike { + op: string; + targets?: readonly object[] | null; } -export function isTerminator(inst) { +export function isTerminator(inst: InstLike): boolean { let info = opInfo(inst.op); if (info.terminator) return true; // any may-throw instruction with explicit control-flow targets (a @@ -190,10 +214,10 @@ export function isTerminator(inst) { return false; } -export function mayThrow(op) { +export function mayThrow(op: string): boolean { return (opInfo(op).effects & Effect.THROW) !== 0; } -export function isPure(op) { +export function isPure(op: string): boolean { return opInfo(op).effects === Effect.NONE && !opInfo(op).terminator; } diff --git a/lib/eir/printer.js b/lib/eir/printer.js deleted file mode 100644 index ba774be5..00000000 --- a/lib/eir/printer.js +++ /dev/null @@ -1,104 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// canonical textual form of EIR. deterministic (values numbered densely in -// print order) so it can back golden tests. - -import { opInfo, isTerminator } from "./ops"; - -function fmtImm(v) { - if (typeof v === "string") return JSON.stringify(v); - if (Array.isArray(v)) return `[${v.map(fmtImm).join(", ")}]`; - return String(v); -} - -export function printFunction(fn) { - // dense renumbering in block/instruction order for stable output - let names = new Map(); - let next = 0; - let nameOf = (v) => { - if (v === null || v === undefined) return ""; - if (!names.has(v)) names.set(v, `%${next++}`); - return names.get(v); - }; - - for (let b of fn.blocks) { - for (let p of b.params) nameOf(p); - for (let i of b.insts) nameOf(i); - } - - let lines = []; - let header_params = fn.entry ? fn.entry.params.map((p) => `${nameOf(p)}: ${p.type}`) : []; - let header_str = header_params.join(", "); - lines.push(`fn @${fn.name}(${header_str}) {`); - - // note: inner templates are hoisted out of outer template expressions - // throughout this file; the legacy compiler miscompiles a template - // inside an arrow inside another template's ${} (DesugarTemplates bug). - let paramStr = (p) => `${nameOf(p)}: ${p.type}`; - - for (let b of fn.blocks) { - let plist = ""; - if (b !== fn.entry && b.params.length > 0) { - let inner = b.params.map(paramStr).join(", "); - plist = `(${inner})`; - } else if (b !== fn.entry) plist = "()"; - if (b === fn.entry) lines.push(`^${b.name}:`); - else lines.push(`^${b.name}${plist}:`); - - for (let inst of b.insts) { - lines.push(` ${printInst(inst, nameOf)}`); - } - } - lines.push("}"); - return lines.join("\n"); -} - -function printTarget(t, nameOf) { - let args = t.args.map((a) => nameOf(a)).join(", "); - let kind = t.kind ? `${t.kind} ` : ""; - return `${kind}^${t.block.name}(${args})`; -} - -export function printInst(inst, nameOf) { - let info = opInfo(inst.op); - let parts = []; - - let producesValue = !info.terminator || false; - // terminators don't produce values; invoke-style calls do - if (inst.op === "br" || inst.op === "cond_br" || inst.op === "return" || - inst.op === "throw" || inst.op === "unreachable") - producesValue = false; - else producesValue = true; - - let rhs = [inst.op]; - - let operand_strs = inst.operands.map((o) => nameOf(o)); - let imm_strs = []; - if (info.imms) { - for (let imm of info.imms) { - if (inst.imms[imm] !== undefined) imm_strs.push(`${imm}=${fmtImm(inst.imms[imm])}`); - } - } - - let all = operand_strs.concat(imm_strs); - let text = inst.op + (all.length ? " " + all.join(", ") : ""); - - if (inst.targets && inst.targets.length > 0) { - text += " -> " + inst.targets.map((t) => printTarget(t, nameOf)).join(", "); - } - - if (producesValue) return `${nameOf(inst)} = ${text}`; - return text; -} - -export function printModule(mod) { - let out = [`module ${mod.name} {`]; - for (let fn of mod.functions) { - out.push(printFunction(fn)); - out.push(""); - } - out.push("}"); - return out.join("\n"); -} diff --git a/lib/eir/printer.ts b/lib/eir/printer.ts new file mode 100644 index 00000000..86354754 --- /dev/null +++ b/lib/eir/printer.ts @@ -0,0 +1,103 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// canonical textual form of EIR. deterministic (values numbered densely in +// print order) so it can back golden tests. + +import { opInfo } from "./ops"; +import type { Func, Inst, Module, Target, ImmValue } from "./ir"; + +function fmtImm(v: ImmValue): string { + if (typeof v === "string") return JSON.stringify(v); + if (Array.isArray(v)) return `[${v.map(fmtImm).join(", ")}]`; + return String(v); +} + +type NameOf = (v: Inst | null | undefined) => string; + +export function printFunction(fn: Func): string { + // dense renumbering in block/instruction order for stable output + const names = new Map(); + let next = 0; + const nameOf: NameOf = (v) => { + if (v === null || v === undefined) return ""; + let name = names.get(v); + if (name === undefined) { + name = `%${next++}`; + names.set(v, name); + } + return name; + }; + + for (const b of fn.blocks) { + for (const p of b.params) nameOf(p); + for (const i of b.insts) nameOf(i); + } + + const lines: string[] = []; + const header_params = fn.entry ? fn.entry.params.map((p) => `${nameOf(p)}: ${p.type}`) : []; + lines.push(`fn @${fn.name}(${header_params.join(", ")}) {`); + + const paramStr = (p: Inst) => `${nameOf(p)}: ${p.type}`; + + for (const b of fn.blocks) { + if (b === fn.entry) { + lines.push(`^${b.name}:`); + } else { + const inner = b.params.map(paramStr).join(", "); + lines.push(`^${b.name}(${inner}):`); + } + + for (const inst of b.insts) { + lines.push(` ${printInst(inst, nameOf)}`); + } + } + lines.push("}"); + return lines.join("\n"); +} + +function printTarget(t: Target, nameOf: NameOf): string { + const args = t.args.map((a) => nameOf(a)).join(", "); + const kind = t.kind ? `${t.kind} ` : ""; + return `${kind}^${t.block.name}(${args})`; +} + +export function printInst(inst: Inst, nameOf: NameOf): string { + const info = opInfo(inst.op); + + const producesValue = + inst.op !== "br" && + inst.op !== "cond_br" && + inst.op !== "return" && + inst.op !== "throw" && + inst.op !== "unreachable"; + + const operand_strs = inst.operands.map((o) => nameOf(o)); + const imm_strs: string[] = []; + if (info.imms) { + for (const imm of info.imms) { + if (inst.imms[imm] !== undefined) imm_strs.push(`${imm}=${fmtImm(inst.imms[imm])}`); + } + } + + const all = operand_strs.concat(imm_strs); + let text = inst.op + (all.length ? " " + all.join(", ") : ""); + + if (inst.targets && inst.targets.length > 0) { + text += " -> " + inst.targets.map((t) => printTarget(t, nameOf)).join(", "); + } + + if (producesValue) return `${nameOf(inst)} = ${text}`; + return text; +} + +export function printModule(mod: Module): string { + const out = [`module ${mod.name} {`]; + for (const fn of mod.functions) { + out.push(printFunction(fn)); + out.push(""); + } + out.push("}"); + return out.join("\n"); +} diff --git a/lib/eir/verifier.js b/lib/eir/verifier.ts similarity index 64% rename from lib/eir/verifier.js rename to lib/eir/verifier.ts index d780a416..f727a7b5 100644 --- a/lib/eir/verifier.js +++ b/lib/eir/verifier.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ // EIR structural verifier. checks: @@ -14,18 +14,20 @@ import { opInfo, isTerminator } from "./ops"; import { printInst } from "./printer"; +import type { Func, Block, Inst, Module } from "./ir"; -function computeRPO(fn) { - let visited = new Set(); - let postorder = []; +function computeRPO(fn: Func): { rpo: Block[]; reachable: Set } { + const entry = fn.entry!; + const visited = new Set(); + const postorder: Block[] = []; // iterative dfs to keep the verifier usable on deep CFGs - let stack = [{ block: fn.entry, succIndex: 0 }]; - visited.add(fn.entry); + const stack = [{ block: entry, succIndex: 0 }]; + visited.add(entry); while (stack.length > 0) { - let frame = stack[stack.length - 1]; - let succs = frame.block.succs(); + const frame = stack[stack.length - 1]!; + const succs = frame.block.succs(); if (frame.succIndex < succs.length) { - let s = succs[frame.succIndex++]; + const s = succs[frame.succIndex++]!; if (!visited.has(s)) { visited.add(s); stack.push({ block: s, succIndex: 0 }); @@ -39,17 +41,18 @@ function computeRPO(fn) { } // Cooper/Harvey/Kennedy "A Simple, Fast Dominance Algorithm" -function computeDominators(fn, rpo) { - let index = new Map(); +function computeDominators(fn: Func, rpo: Block[]): Map { + const entry = fn.entry!; + const index = new Map(); rpo.forEach((b, i) => index.set(b, i)); - let idom = new Map(); - idom.set(fn.entry, fn.entry); + const idom = new Map(); + idom.set(entry, entry); - let intersect = (a, b) => { + const intersect = (a: Block, b: Block): Block => { while (a !== b) { - while (index.get(a) > index.get(b)) a = idom.get(a); - while (index.get(b) > index.get(a)) b = idom.get(b); + while (index.get(a)! > index.get(b)!) a = idom.get(a)!; + while (index.get(b)! > index.get(a)!) b = idom.get(b)!; } return a; }; @@ -57,10 +60,10 @@ function computeDominators(fn, rpo) { let changed = true; while (changed) { changed = false; - for (let b of rpo) { - if (b === fn.entry) continue; - let newIdom = null; - for (let p of b.preds()) { + for (const b of rpo) { + if (b === entry) continue; + let newIdom: Block | null = null; + for (const p of b.preds()) { if (!index.has(p)) continue; // unreachable pred if (!idom.has(p)) continue; newIdom = newIdom === null ? p : intersect(p, newIdom); @@ -74,25 +77,23 @@ function computeDominators(fn, rpo) { return idom; } -function dominates(idom, a, b) { +function dominates(idom: Map, a: Block, b: Block): boolean { // does block a dominate block b? let runner = b; - while (true) { + for (;;) { if (runner === a) return true; - let next = idom.get(runner); + const next = idom.get(runner); if (next === undefined || next === runner) return runner === a; runner = next; } } -export function verifyFunction(fn) { - // inner template hoisted out of the outer template: the legacy - // compiler miscompiles nested templates through arrows. - let vname = (v) => `%v${v.id}`; - let fail = (msg, inst) => { +export function verifyFunction(fn: Func): boolean { + const vname = (v: Inst | null | undefined) => (v ? `%v${v.id}` : ""); + const fail = (msg: string, inst?: Inst): never => { let where = ""; if (inst) { - let inst_str = printInst(inst, vname); + const inst_str = printInst(inst, vname); where = ` at '${inst_str}'`; } throw new Error(`EIR verifier: fn @${fn.name}: ${msg}${where}`); @@ -100,38 +101,40 @@ export function verifyFunction(fn) { if (!fn.entry) fail("no entry block"); - let { rpo, reachable } = computeRPO(fn); - let idom = computeDominators(fn, rpo); + const { rpo, reachable } = computeRPO(fn); + const idom = computeDominators(fn, rpo); // per-block structural checks - for (let b of fn.blocks) { + for (const b of fn.blocks) { if (!b.sealed) fail(`block ^${b.name} is not sealed`); if (!reachable.has(b)) continue; // ignore unreachable blocks beyond seal check - let term = null; + let term: Inst | null = null; for (let i = 0; i < b.insts.length; i++) { - let inst = b.insts[i]; - let info = opInfo(inst.op); // throws on unknown op + const inst = b.insts[i]!; + const info = opInfo(inst.op); // throws on unknown op if (info.arity >= 0 && inst.operands.length !== info.arity) fail(`'${inst.op}' has ${inst.operands.length} operands, wants ${info.arity}`, inst); if (isTerminator(inst)) { - if (i !== b.insts.length - 1) - fail(`terminator in the middle of ^${b.name}`, inst); + if (i !== b.insts.length - 1) fail(`terminator in the middle of ^${b.name}`, inst); term = inst; } if (inst.op === "blockparam") fail("blockparam in instruction stream", inst); } - if (!term) fail(`block ^${b.name} has no terminator`); + if (!term) { + fail(`block ^${b.name} has no terminator`); + continue; + } // edge argument counts match target params (catch blocks' exception // param is produced by unwinding, not passed on the edge) if (term.targets) { - for (let t of term.targets) { + for (const t of term.targets) { let expected = t.block.params.length; if (t.block.isCatch) { if (t.kind !== "unwind") fail(`non-unwind edge into catch block ^${t.block.name}`, term); - if (t.block.params.length === 0 || !t.block.params[0].isException) + if (t.block.params.length === 0 || !t.block.params[0]!.isException) fail(`catch block ^${t.block.name} missing its exception param`, term); expected -= 1; } else if (t.kind === "unwind") { @@ -142,7 +145,7 @@ export function verifyFunction(fn) { `edge to ^${t.block.name} passes ${t.args.length} args, target wants ${expected}`, term ); - for (let a of t.args) + for (const a of t.args) if (a === null || a === undefined) fail(`edge to ^${t.block.name} has an unfilled argument`, term); } @@ -152,18 +155,22 @@ export function verifyFunction(fn) { // def-dominates-use. a value used as an operand must be defined in a // block that dominates the use block (params count as defined at block // entry; straight-line order enforced within a block). - let instIndex = new Map(); - for (let b of fn.blocks) { + const instIndex = new Map(); + for (const b of fn.blocks) { b.insts.forEach((inst, i) => instIndex.set(inst, i)); } - let checkUse = (val, userBlock, userIdx, inst) => { + const checkUse = (val: Inst | null, userBlock: Block, userIdx: number, inst: Inst): void => { + if (!val) { + fail("null operand", inst); + return; + } if (val.removed) fail("use of removed block parameter", inst); - let defBlock = val.block; + const defBlock = val.block!; if (!reachable.has(defBlock)) fail("operand defined in unreachable block", inst); if (defBlock === userBlock) { if (val.op === "blockparam") return; // defined at entry of the block - let defIdx = instIndex.get(val); + const defIdx = instIndex.get(val); if (defIdx === undefined || defIdx >= userIdx) fail(`operand %v${val.id} used before definition`, inst); } else { @@ -175,12 +182,12 @@ export function verifyFunction(fn) { } }; - for (let b of fn.blocks) { + for (const b of fn.blocks) { if (!reachable.has(b)) continue; b.insts.forEach((inst, i) => { - for (let o of inst.operands) checkUse(o, b, i, inst); + for (const o of inst.operands) checkUse(o, b, i, inst); if (inst.targets) { - for (let t of inst.targets) for (let a of t.args) checkUse(a, b, i, inst); + for (const t of inst.targets) for (const a of t.args) checkUse(a, b, i, inst); } }); } @@ -188,7 +195,7 @@ export function verifyFunction(fn) { return true; } -export function verifyModule(mod) { - for (let fn of mod.functions) verifyFunction(fn); +export function verifyModule(mod: Module): boolean { + for (const fn of mod.functions) verifyFunction(fn); return true; } diff --git a/lib/estree.ts b/lib/estree.ts index 60d0d9cc..4a216282 100644 --- a/lib/estree.ts +++ b/lib/estree.ts @@ -13,12 +13,7 @@ // eir_main / ir_func and friends. import type { EjsFunction, DISubprogram } from "@llvm"; - -// placeholder until eir/ir.ts lands; replaced by -// import type { Module as EIRModule } from "./eir/ir"; -export interface EIRModule { - name: string; -} +import type { Module as EIRModule } from "./eir/ir"; export interface Position { line: number; From a9b495b0fcf1c7d77ce9ac3c98e6e0b83c405609 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 12:41:49 -0700 Subject: [PATCH 054/146] ts: types, consts, abi, sret-abi, triple, module-info MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit types.ts keeps the late-initialized EjsObject/EjsFunction/EjsModule (pointer-size-dependent, set by initTypes) as uninitialized typed lets; the abi dependency is inverted through a small FunctionTypeMaker interface. ABI/SRetABI get an EjsParam interface and typed overrides; porting exposed that SRetABI's sret call path still used the pre-new_llvm 2-arg createLoad — dead on 64-bit hosts, now the 3-arg form. ModuleInfo becomes abstract (path/module_name are every subclass's obligation); ExportInfo is a real interface. llvm.d.ts grows the sret FunctionType form and the remaining bookkeeping properties. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/abi.js | 76 ------------------ lib/abi.ts | 103 +++++++++++++++++++++++++ lib/consts.js | 60 --------------- lib/consts.ts | 65 ++++++++++++++++ lib/llvm.d.ts | 9 ++- lib/module-info.js | 76 ------------------ lib/module-info.ts | 109 ++++++++++++++++++++++++++ lib/sret-abi.js | 120 ----------------------------- lib/sret-abi.ts | 144 +++++++++++++++++++++++++++++++++++ lib/{triple.js => triple.ts} | 90 +++++++++++++--------- lib/{types.js => types.ts} | 83 +++++++++++--------- 11 files changed, 527 insertions(+), 408 deletions(-) delete mode 100644 lib/abi.js create mode 100644 lib/abi.ts delete mode 100644 lib/consts.js create mode 100644 lib/consts.ts delete mode 100644 lib/module-info.js create mode 100644 lib/module-info.ts delete mode 100644 lib/sret-abi.js create mode 100644 lib/sret-abi.ts rename lib/{triple.js => triple.ts} (70%) rename lib/{types.js => types.ts} (50%) diff --git a/lib/abi.js b/lib/abi.js deleted file mode 100644 index 30eefef1..00000000 --- a/lib/abi.js +++ /dev/null @@ -1,76 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import * as llvm from "@llvm"; -import * as types from "./types"; - -let ir = llvm.IRBuilder; - -// our base ABI class assumes that there are no restrictions on -// EjsValue types, and that they can be passed by value and returned by -// value with no modification to signatures or callsites. -// -export class ABI { - constructor() { - this.ejs_return_type = types.EjsValue; - this.ejs_params = [ - { name: "%env", llvm_type: types.EjsValue }, // should be EjsClosureEnv - { name: "%this", llvm_type: types.EjsValue.pointerTo() }, - { name: "%argc", llvm_type: types.Int32 }, - { name: "%args", llvm_type: types.EjsValue.pointerTo() }, - { name: "%newTarget", llvm_type: types.EjsValue }, - ]; - this.env_param_index = 0; - this.this_param_index = 1; - this.argc_param_index = 2; - this.args_param_index = 3; - this.newTarget_param_index = 3; - } - - // this function c&p from LLVMIRVisitor below - createAlloca(func, type, name) { - let saved_insert_point = ir.getInsertBlock(); - ir.setInsertPointStartBB(func.entry_bb); - let alloca = ir.createAlloca(type, name); - - // if EjsValue was a pointer value we would be able to use an the llvm gcroot intrinsic here. but with the nan boxing - // we kinda lose out as the llvm IR code doesn't permit non-reference types to be gc roots. - // if type is types.EjsValue - // // EjsValues are rooted - // this.createCall this.llvm_intrinsics.gcroot(), [(ir.createPointerCast alloca, types.Int8Pointer.pointerTo(), 'rooted_alloca'), consts.Null types.Int8Pointer], '' - - ir.setInsertPoint(saved_insert_point); - return alloca; - } - forwardCalleeAttributes(fromCallee, toCall) { - if (fromCallee.doesNotThrow) toCall.setDoesNotThrow(); - if (fromCallee.doesNotAccessMemory) toCall.setDoesNotAccessMemory(); - if (!fromCallee.doesNotAccessMemory && fromCallee.onlyReadsMemory) - toCall.setOnlyReadsMemory(); - toCall._ejs_returns_ejsval_bool = fromCallee.returns_ejsval_bool; - } - - createCall(fromFunction, calleeType, callee, argv, callname) { - // XXX this is wrong currently (createCall/createInvoke must take another arg (the function type) - // new_llvm - return ir.createCall(calleeType, callee, argv, callname); - } - createInvoke(fromFunction, calleeType, callee, argv, normal_block, exc_block, callname) { - // XXX this is wrong currently (createCall/createInvoke must take another arg (the function type) - // new_llvm - return ir.createInvoke(calleeType, callee, argv, normal_block, exc_block, callname); - } - createRet(fromFunction, value) { - return ir.createRet(value); - } - createExternalFunction(inModule, name, ret_type, param_types) { - return inModule.getOrInsertExternalFunction(name, ret_type, param_types); - } - createFunction(inModule, name, ret_type, param_types) { - return inModule.getOrInsertFunction(name, ret_type, param_types); - } - createFunctionType(ret_type, param_types) { - return llvm.FunctionType.get(ret_type, param_types); - } -} diff --git a/lib/abi.ts b/lib/abi.ts new file mode 100644 index 00000000..c6004a73 --- /dev/null +++ b/lib/abi.ts @@ -0,0 +1,103 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +import * as llvm from "@llvm"; +import * as types from "./types"; + +const ir = llvm.IRBuilder; + +export interface EjsParam { + name: string; + llvm_type: llvm.Type; +} + +// our base ABI class assumes that there are no restrictions on +// EjsValue types, and that they can be passed by value and returned by +// value with no modification to signatures or callsites. +// +export class ABI { + ejs_return_type: llvm.Type = types.EjsValue; + ejs_params: EjsParam[] = [ + { name: "%env", llvm_type: types.EjsValue }, // should be EjsClosureEnv + { name: "%this", llvm_type: types.EjsValue.pointerTo() }, + { name: "%argc", llvm_type: types.Int32 }, + { name: "%args", llvm_type: types.EjsValue.pointerTo() }, + { name: "%newTarget", llvm_type: types.EjsValue }, + ]; + env_param_index = 0; + this_param_index = 1; + argc_param_index = 2; + args_param_index = 3; + newTarget_param_index = 3; + + createAlloca(func: llvm.EjsFunction, type: llvm.Type, name: string): llvm.AllocaInst { + const saved_insert_point = ir.getInsertBlock(); + ir.setInsertPointStartBB(func.entry_bb!); + const alloca = ir.createAlloca(type, name); + + // if EjsValue was a pointer value we would be able to use the llvm + // gcroot intrinsic here. but with the nan boxing we kinda lose out + // as the llvm IR code doesn't permit non-reference types to be gc + // roots. + + ir.setInsertPoint(saved_insert_point); + return alloca; + } + + forwardCalleeAttributes(fromCallee: llvm.EjsFunction, toCall: llvm.CallInst): void { + if (fromCallee.doesNotThrow) toCall.setDoesNotThrow(); + if (fromCallee.doesNotAccessMemory) toCall.setDoesNotAccessMemory(); + if (!fromCallee.doesNotAccessMemory && fromCallee.onlyReadsMemory) + toCall.setOnlyReadsMemory(); + toCall._ejs_returns_ejsval_bool = fromCallee.returns_ejsval_bool; + } + + createCall( + fromFunction: llvm.EjsFunction, + calleeType: llvm.FunctionType, + callee: llvm.Value, + argv: llvm.Value[], + callname: string + ): llvm.Value { + return ir.createCall(calleeType, callee, argv, callname); + } + + createInvoke( + fromFunction: llvm.EjsFunction, + calleeType: llvm.FunctionType, + callee: llvm.Value, + argv: llvm.Value[], + normal_block: llvm.BasicBlock, + exc_block: llvm.BasicBlock, + callname: string + ): llvm.Value { + return ir.createInvoke(calleeType, callee, argv, normal_block, exc_block, callname); + } + + createRet(fromFunction: llvm.EjsFunction, value: llvm.Value): llvm.Value { + return ir.createRet(value); + } + + createExternalFunction( + inModule: llvm.Module, + name: string, + ret_type: llvm.Type, + param_types: llvm.Type[] + ): llvm.EjsFunction { + return inModule.getOrInsertExternalFunction(name, ret_type, param_types); + } + + createFunction( + inModule: llvm.Module, + name: string, + ret_type: llvm.Type, + param_types: llvm.Type[] + ): llvm.EjsFunction { + return inModule.getOrInsertFunction(name, ret_type, param_types); + } + + createFunctionType(ret_type: llvm.Type, param_types: llvm.Type[]): llvm.FunctionType { + return llvm.FunctionType.get(ret_type, param_types); + } +} diff --git a/lib/consts.js b/lib/consts.js deleted file mode 100644 index 1e966ea5..00000000 --- a/lib/consts.js +++ /dev/null @@ -1,60 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import * as types from "./types"; -import * as llvm from "@llvm"; - -export function string(ir, c) { - let constant = ir.createGlobalStringPtr(c, "strconst"); - constant.is_constant = true; - constant.constant_val = c; - return constant; -} - -function intConstant(type, ...constant_val) { - let constant = llvm.Constant.getIntegerValue(type, ...constant_val); - constant.is_constant = true; - constant.constant_val = constant_val; - return constant; -} - -export function jschar(c) { - return intConstant(types.JSChar, c); -} -export function int32(c) { - return intConstant(types.Int32, c); -} -export function int1(c) { - return intConstant(types.Int1, c); -} -export function int64(c) { - return intConstant(types.Int64, c); -} -export function int64_lowhi(ch, cl) { - return intConstant(types.Int64, ch, cl); -} -export function bool(c) { - let constant = llvm.Constant.getIntegerValue(types.Bool, c === false ? 0 : 1); - constant.is_constant = true; - constant.constant_val = c; - return constant; -} - -export function Null(t) { - return llvm.Constant.getNull(t); -} - -export function True() { - return bool(true); -} -export function False() { - return bool(false); -} - -export function ejsval_true(is32bit) { - return int64_lowhi(is32bit ? 0xffffff83 : 0xfff98000, 0x00000001); -} -export function ejsval_false(is32bit) { - return int64_lowhi(is32bit ? 0xffffff83 : 0xfff98000, 0x00000000); -} diff --git a/lib/consts.ts b/lib/consts.ts new file mode 100644 index 00000000..da2ac0b9 --- /dev/null +++ b/lib/consts.ts @@ -0,0 +1,65 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +import * as types from "./types"; +import * as llvm from "@llvm"; + +// the IRBuilder surface string() needs (avoids importing the whole thing) +interface StringBuilder { + createGlobalStringPtr(value: string, name: string): llvm.Constant; +} + +export function string(ir: StringBuilder, c: string): llvm.Constant { + const constant = ir.createGlobalStringPtr(c, "strconst"); + constant.is_constant = true; + constant.constant_val = c; + return constant; +} + +function intConstant(type: llvm.Type, ...constant_val: number[]): llvm.Constant { + const constant = llvm.Constant.getIntegerValue(type, ...constant_val); + constant.is_constant = true; + constant.constant_val = constant_val; + return constant; +} + +export function jschar(c: number): llvm.Constant { + return intConstant(types.JSChar, c); +} +export function int32(c: number): llvm.Constant { + return intConstant(types.Int32, c); +} +export function int1(c: number): llvm.Constant { + return intConstant(types.Int1, c); +} +export function int64(c: number): llvm.Constant { + return intConstant(types.Int64, c); +} +export function int64_lowhi(ch: number, cl: number): llvm.Constant { + return intConstant(types.Int64, ch, cl); +} +export function bool(c: boolean): llvm.Constant { + const constant = llvm.Constant.getIntegerValue(types.Bool, c === false ? 0 : 1); + constant.is_constant = true; + constant.constant_val = c; + return constant; +} + +export function Null(t: llvm.Type): llvm.Constant { + return llvm.Constant.getNull(t); +} + +export function True(): llvm.Constant { + return bool(true); +} +export function False(): llvm.Constant { + return bool(false); +} + +export function ejsval_true(is32bit: boolean): llvm.Constant { + return int64_lowhi(is32bit ? 0xffffff83 : 0xfff98000, 0x00000001); +} +export function ejsval_false(is32bit: boolean): llvm.Constant { + return int64_lowhi(is32bit ? 0xffffff83 : 0xfff98000, 0x00000000); +} diff --git a/lib/llvm.d.ts b/lib/llvm.d.ts index 69370aaa..7c1a7edc 100644 --- a/lib/llvm.d.ts +++ b/lib/llvm.d.ts @@ -66,7 +66,9 @@ declare module "@llvm" { }; const FunctionType: { - get(ret: Type, params: Type[]): FunctionType; + // the 3-arg form is jsllvm's sret shape: the real return value + // is written through an sret pointer while `ret` is void + get(ret: Type, params: Type[], sret?: Type): FunctionType; }; const ArrayType: { @@ -93,8 +95,11 @@ declare module "@llvm" { setPersonality(fn: EjsFunction): void; // compiler bookkeeping doesNotThrow?: boolean; + doesNotAccessMemory?: boolean; onlyReadsMemory?: boolean; returns_ejsval_bool?: boolean; + takes_builtins?: boolean; + entry_bb?: BasicBlock; } interface BasicBlock { @@ -142,6 +147,8 @@ declare module "@llvm" { setDoesNotAccessMemory(): void; setDoesNotThrow(): void; setStructRet(): void; + // compiler bookkeeping (see ABI.forwardCalleeAttributes) + _ejs_returns_ejsval_bool?: boolean; } interface InvokeInst extends CallInst {} diff --git a/lib/module-info.js b/lib/module-info.js deleted file mode 100644 index d7813228..00000000 --- a/lib/module-info.js +++ /dev/null @@ -1,76 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import { sanitize_with_regexp } from "./echo-util"; - -export class ModuleInfo { - constructor(is_native) { - this.slot_num = 0; - this.exports = new Map(); - this.importList = []; - this.has_default = false; - this.is_native = is_native; - } - - setHasDefaultExport() { - this.has_default = true; - } - - hasDefaultExport() { - return this.has_default; - } - - addExport(ident, constval) { - this.exports.set(ident, { - constval: constval, - slot_num: this.slot_num, - }); - this.slot_num++; - } - - // a hidden slot for a non-exported module-level var: it shares the - // export slot array (so allocation sizing and GC scanning need no - // changes) but is private to the module -- import resolution and the - // module-object accessors skip promoted entries. - addPromotedSlot(ident) { - if (this.exports.has(ident)) return; - this.exports.set(ident, { - constval: undefined, - slot_num: this.slot_num, - promoted: true, - }); - this.slot_num++; - } - - addImportSource(source_path) { - if (this.importList.indexOf(source_path) === -1) this.importList.push(source_path); - } - - isNative() { - return this.is_native; - } -} - -export class JSModuleInfo extends ModuleInfo { - constructor(path) { - super(false); - this.path = path; - let sanitized_path = sanitize_with_regexp(path); - this.toplevel_function_name = `_ejs_toplevel_${sanitized_path}`; - this.module_name = `_ejs_module_${sanitized_path}`; - } - -} - -export class NativeModuleInfo extends ModuleInfo { - constructor(name, init_function, link_flags, module_files, ejs_dir) { - super(true); - this.path = name; - this.module_name = name; - this.init_function = init_function; - this.link_flags = link_flags.join(" "); - this.module_files = module_files; - this.ejs_dir = ejs_dir; - } -} diff --git a/lib/module-info.ts b/lib/module-info.ts new file mode 100644 index 00000000..2b1aed63 --- /dev/null +++ b/lib/module-info.ts @@ -0,0 +1,109 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +import { sanitize_with_regexp } from "./echo-util"; +import type { Literal } from "./estree"; + +export interface ExportInfo { + // a const-literal export's folded initializer, when it has one + constval: Literal | undefined; + slot_num: number; + // a hidden slot for a non-exported module-level var (see + // addPromotedSlot); import resolution and the module-object + // accessors skip promoted entries + promoted?: boolean; +} + +export abstract class ModuleInfo { + slot_num = 0; + exports = new Map(); + importList: string[] = []; + has_default = false; + is_native: boolean; + + // every ModuleInfo names a module and its generated artifacts + abstract path: string; + abstract module_name: string; + + constructor(is_native: boolean) { + this.is_native = is_native; + } + + setHasDefaultExport(): void { + this.has_default = true; + } + + hasDefaultExport(): boolean { + return this.has_default; + } + + addExport(ident: string, constval?: Literal): void { + this.exports.set(ident, { + constval: constval, + slot_num: this.slot_num, + }); + this.slot_num++; + } + + // a hidden slot for a non-exported module-level var: it shares the + // export slot array (so allocation sizing and GC scanning need no + // changes) but is private to the module -- import resolution and the + // module-object accessors skip promoted entries. + addPromotedSlot(ident: string): void { + if (this.exports.has(ident)) return; + this.exports.set(ident, { + constval: undefined, + slot_num: this.slot_num, + promoted: true, + }); + this.slot_num++; + } + + addImportSource(source_path: string): void { + if (this.importList.indexOf(source_path) === -1) this.importList.push(source_path); + } + + isNative(): boolean { + return this.is_native; + } +} + +export class JSModuleInfo extends ModuleInfo { + path: string; + module_name: string; + toplevel_function_name: string; + + constructor(path: string) { + super(false); + this.path = path; + const sanitized_path = sanitize_with_regexp(path); + this.toplevel_function_name = `_ejs_toplevel_${sanitized_path}`; + this.module_name = `_ejs_module_${sanitized_path}`; + } +} + +export class NativeModuleInfo extends ModuleInfo { + path: string; + module_name: string; + init_function: string; + link_flags: string; + module_files: string[]; + ejs_dir: string; + + constructor( + name: string, + init_function: string, + link_flags: string[], + module_files: string[], + ejs_dir: string + ) { + super(true); + this.path = name; + this.module_name = name; + this.init_function = init_function; + this.link_flags = link_flags.join(" "); + this.module_files = module_files; + this.ejs_dir = ejs_dir; + } +} diff --git a/lib/sret-abi.js b/lib/sret-abi.js deleted file mode 100644 index 778c206b..00000000 --- a/lib/sret-abi.js +++ /dev/null @@ -1,120 +0,0 @@ -/* -*- Mode: js2; tab-width: 4; indent-tabs-mode: nil; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import * as llvm from "@llvm"; -import * as types from "./types"; -import * as consts from "./consts"; -import { ABI } from "./abi"; - -let ir = llvm.IRBuilder; - -// armv7/x86 requires us to pass a pointer to a stack slot for the return value when it's EjsValue. -// so functions that would normally be defined as: -// -// ejsval _ejs_normal_func (ejsval env, ejsval this, uint32_t argc, ejsval* args) -// -// are instead expressed as: -// -// void _ejs_sret_func (ejsval* sret, ejsval env, ejsval this, uint32_t argc, ejsval* args) -// -export class SRetABI extends ABI { - constructor() { - super(); - this.ejs_return_type = types.Void; - this.ejs_params.unshift({ - name: "%retval", - llvm_type: types.EjsValue.pointerTo(), - }); - this.env_param_index += 1; - this.this_param_index += 1; - this.argc_param_index += 1; - this.args_param_index += 1; - this.newTarget_param_index += 1; - } - - createCall(fromFunction, calleeType, callee, argv, callname) { - if (callee.hasStructRetAttr()) { - let sret_alloca = this.createAlloca(fromFunction, types.EjsValue, "sret"); - argv.unshift(sret_alloca); - - //sret_as_i8 = ir.createBitCast sret_alloca, types.Int8Pointer, "sret_as_i8" - //ir.createLifetimeStart sret_as_i8, consts.int64(8) //sizeof(ejsval) - let call = super.createCall(fromFunction, calleeType, callee, argv, ""); - call.setStructRet(); - - let rv = ir.createLoad(sret_alloca, callname); - //ir.createLifetimeEnd sret_as_i8, consts.int64(8) //sizeof(ejsval) - return rv; - } else { - return super.createCall(fromFunction, calleeType, callee, argv, callname); - } - } - - createInvoke(fromFunction, calleeType, callee, argv, normal_block, exc_block, callname) { - if (callee.hasStructRetAttr()) { - let sret_alloca = this.createAlloca(fromFunction, types.EjsValue, "sret"); - argv.unshift(sret_alloca); - - //sret_as_i8 = ir.createBitCast sret_alloca, types.Int8Pointer, "sret_as_i8" - //ir.createLifetimeStart sret_as_i8, consts.int64(8) //sizeof(ejsval) - let call = super.createInvoke( - fromFunction, - calleeType, - callee, - argv, - normal_block, - exc_block, - "" - ); - call.setStructRet(); - - ir.setInsertPoint(normal_block); - let rv = ir.createLoad(sret_alloca, callname); - //ir.createLifetimeEnd sret_as_i8, consts.int64(8) //sizeof(ejsval) - return rv; - } else { - return super.createInvoke( - fromFunction, - calleeType, - callee, - argv, - normal_block, - exc_block, - callname - ); - } - } - - createRet(fromFunction, value) { - ir.createStore(value, fromFunction.args[0]); - return ir.createRetVoid(); - } - - createExternalFunction(inModule, name, ret_type, param_types) { - return this.createFunction(inModule, name, ret_type, param_types, true); - } - - createFunction(inModule, name, ret_type, param_types, external = false) { - let sret = false; - let rv; - if (ret_type === types.EjsValue) { - param_types.unshift(ret_type.pointerTo()); - ret_type = types.Void; - sret = true; - } - if (external) rv = inModule.getOrInsertExternalFunction(name, ret_type, param_types); - else rv = inModule.getOrInsertFunction(name, ret_type, param_types); - - if (sret) rv.setStructRet(); - return rv; - } - - createFunctionType(ret_type, param_types) { - if (ret_type === types.EjsValue) { - param_types.unshift(ret_type.pointerTo()); - ret_type = types.Void; - } - return super.createFunctionType(ret_type, param_types); - } -} diff --git a/lib/sret-abi.ts b/lib/sret-abi.ts new file mode 100644 index 00000000..0f5df3e2 --- /dev/null +++ b/lib/sret-abi.ts @@ -0,0 +1,144 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +import * as llvm from "@llvm"; +import * as types from "./types"; +import { ABI } from "./abi"; + +const ir = llvm.IRBuilder; + +// armv7/x86 requires us to pass a pointer to a stack slot for the return +// value when it's EjsValue. so functions that would normally be defined +// as: +// +// ejsval _ejs_normal_func (ejsval env, ejsval this, uint32_t argc, ejsval* args) +// +// are instead expressed as: +// +// void _ejs_sret_func (ejsval* sret, ejsval env, ejsval this, uint32_t argc, ejsval* args) +// +export class SRetABI extends ABI { + constructor() { + super(); + this.ejs_return_type = types.Void; + this.ejs_params.unshift({ + name: "%retval", + llvm_type: types.EjsValue.pointerTo(), + }); + this.env_param_index += 1; + this.this_param_index += 1; + this.argc_param_index += 1; + this.args_param_index += 1; + this.newTarget_param_index += 1; + } + + override createCall( + fromFunction: llvm.EjsFunction, + calleeType: llvm.FunctionType, + callee: llvm.Value, + argv: llvm.Value[], + callname: string + ): llvm.Value { + if (calleeHasStructRet(callee)) { + const sret_alloca = this.createAlloca(fromFunction, types.EjsValue, "sret"); + argv.unshift(sret_alloca); + + const call = super.createCall(fromFunction, calleeType, callee, argv, ""); + (call as llvm.CallInst).setStructRet(); + + return ir.createLoad(types.EjsValue, sret_alloca, callname); + } + return super.createCall(fromFunction, calleeType, callee, argv, callname); + } + + override createInvoke( + fromFunction: llvm.EjsFunction, + calleeType: llvm.FunctionType, + callee: llvm.Value, + argv: llvm.Value[], + normal_block: llvm.BasicBlock, + exc_block: llvm.BasicBlock, + callname: string + ): llvm.Value { + if (calleeHasStructRet(callee)) { + const sret_alloca = this.createAlloca(fromFunction, types.EjsValue, "sret"); + argv.unshift(sret_alloca); + + const call = super.createInvoke( + fromFunction, + calleeType, + callee, + argv, + normal_block, + exc_block, + "" + ); + (call as llvm.CallInst).setStructRet(); + + ir.setInsertPoint(normal_block); + return ir.createLoad(types.EjsValue, sret_alloca, callname); + } + return super.createInvoke( + fromFunction, + calleeType, + callee, + argv, + normal_block, + exc_block, + callname + ); + } + + override createRet(fromFunction: llvm.EjsFunction, value: llvm.Value): llvm.Value { + ir.createStore(value, fromFunction.args[0]!); + return ir.createRetVoid(); + } + + override createExternalFunction( + inModule: llvm.Module, + name: string, + ret_type: llvm.Type, + param_types: llvm.Type[] + ): llvm.EjsFunction { + return this.createFunction(inModule, name, ret_type, param_types, true); + } + + override createFunction( + inModule: llvm.Module, + name: string, + ret_type: llvm.Type, + param_types: llvm.Type[], + external = false + ): llvm.EjsFunction { + let sret = false; + if (ret_type === types.EjsValue) { + param_types.unshift(ret_type.pointerTo()); + ret_type = types.Void; + sret = true; + } + const rv = external + ? inModule.getOrInsertExternalFunction(name, ret_type, param_types) + : inModule.getOrInsertFunction(name, ret_type, param_types); + + if (sret) rv.setStructRet(); + return rv; + } + + override createFunctionType(ret_type: llvm.Type, param_types: llvm.Type[]): llvm.FunctionType { + if (ret_type === types.EjsValue) { + param_types.unshift(ret_type.pointerTo()); + ret_type = types.Void; + } + return super.createFunctionType(ret_type, param_types); + } +} + +// callees arrive as plain Values (function pointers or functions); only +// actual functions carry the sret attribute +function calleeHasStructRet(callee: llvm.Value): callee is llvm.EjsFunction { + return ( + typeof (callee as llvm.EjsFunction).hasStructRetAttr === "function" && + (callee as llvm.EjsFunction).hasStructRetAttr() + ); +} diff --git a/lib/triple.js b/lib/triple.ts similarity index 70% rename from lib/triple.js rename to lib/triple.ts index e8e650e3..25e4cab1 100644 --- a/lib/triple.js +++ b/lib/triple.ts @@ -1,27 +1,43 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + import * as os from "@node-compat/os"; import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; +export interface TripleParts { + arch: string; + vendor: string; + os: string; + env?: string | undefined; +} + export class Triple { - constructor({ arch, vendor, os, env }) { + arch: string; + vendor: string; + os: string; + env: string | undefined; + + constructor({ arch, vendor, os, env }: TripleParts) { this.arch = arch; this.vendor = vendor; this.os = os; this.env = env; } - toString() { + toString(): string { const envSuffix = this.env ? `-${this.env}` : ""; return `${this.arch}-${this.vendor}-${this.os}${envSuffix}`; } // same as toString but we drop the vendor - toShortString() { + toShortString(): string { const envSuffix = this.env ? `-${this.env}` : ""; return `${this.arch}-${this.os}${envSuffix}`; } - isLittleEndian() { + isLittleEndian(): boolean { switch (this.arch) { case "x86_64": case "x86": @@ -34,7 +50,7 @@ export class Triple { } } - pointerSize() { + pointerSize(): number { switch (this.arch) { case "x86_64": case "arm64": @@ -54,7 +70,7 @@ export class Triple { // computes different field offsets than the C compiler does for the // runtime (e.g. EJSModule.exports), corrupting every module slot // access and blinding the GC to module-referenced objects. - llvmTriple() { + llvmTriple(): string { switch (this.os) { case "macos": return `${this.arch}-apple-macosx`; @@ -69,7 +85,7 @@ export class Triple { // must match what clang uses for the runtime's target (see llvmTriple // above for why). - dataLayout() { + dataLayout(): string { if (this.os === "macos" || this.os === "ios") { if (this.arch === "arm64" || this.arch === "aarch64") return "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"; @@ -80,7 +96,7 @@ export class Triple { return "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"; } - llcArch() { + llcArch(): string { switch (this.arch) { case "x86_64": return "x86-64"; @@ -97,7 +113,7 @@ export class Triple { } } - clangArch() { + clangArch(): string { switch (this.arch) { case "x86_64": return "x86_64"; @@ -114,7 +130,7 @@ export class Triple { } } - abi() { + abi(): ABI { switch (this.arch) { case "x86_64": case "aarch64": @@ -128,14 +144,14 @@ export class Triple { } } - static fromProcess() { + static fromProcess(): Triple { let vendor = "unknown"; - let arch = os.arch(); + let arch: string = os.arch(); if (arch === "x64") arch = "x86_64"; if (arch === "ia32") arch = "x86"; - let _os = os.platform(); + let _os: string = os.platform(); if (_os === "darwin") { vendor = "apple"; _os = "macos"; @@ -144,38 +160,36 @@ export class Triple { return new Triple({ arch, vendor, os: _os }); } - static fromString(str) { - let split = str.split("-"); - let arch, vendor, os, env; - if (split.length == 2) { - arch = "unknown"; - [vendor, os] = split; - } else if (split.length == 3) { - [arch, vendor, os] = split; - } else if (split.length == 4) { - [arch, vendor, os, env] = split; - } else { - throw new Error(`invalid triple: ${str}`); + static fromString(str: string): Triple { + const split = str.split("-"); + if (split.length === 2) { + const [vendor, os] = split; + return new Triple({ arch: "unknown", vendor: vendor!, os: os! }); + } else if (split.length === 3) { + const [arch, vendor, os] = split; + return new Triple({ arch: arch!, vendor: vendor!, os: os! }); + } else if (split.length === 4) { + const [arch, vendor, os, env] = split; + return new Triple({ arch: arch!, vendor: vendor!, os: os!, env }); } - return new Triple({ arch, vendor, os, env }); + throw new Error(`invalid triple: ${str}`); } - static fromShortString(str) { - let split = str.split("-"); - let arch, vendor, os, env; - if (split.length == 2) { - [arch, os] = split; - } else if (split.length == 3) { - [arch, os, env] = split; + static fromShortString(str: string): Triple { + const split = str.split("-"); + let arch: string, os: string, env: string | undefined; + if (split.length === 2) { + [arch, os] = split as [string, string]; + } else if (split.length === 3) { + [arch, os, env] = split as [string, string, string]; } else { throw new Error(`invalid triple short string: ${str}`); } // try and fill in the vendor - if (os === "macos" || os === "ios" || os === "tvos" || os === "watchos") { - vendor = "apple"; - } /* if (os === "linux") */ else { - vendor = "unknown"; - } + const vendor = + os === "macos" || os === "ios" || os === "tvos" || os === "watchos" + ? "apple" + : "unknown"; return new Triple({ arch, vendor, os, env }); } } diff --git a/lib/types.js b/lib/types.ts similarity index 50% rename from lib/types.js rename to lib/types.ts index fffdbc75..798771a4 100644 --- a/lib/types.js +++ b/lib/types.ts @@ -1,35 +1,42 @@ -/* -*- Mode: js2; tab-width: 4; indent-tabs-mode: nil; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ + import * as llvm from "@llvm"; -export let String = llvm.Type.getInt8Ty().pointerTo(); -export let Int8Pointer = String; -export let Bool = llvm.Type.getInt8Ty(); -export let Void = llvm.Type.getVoidTy(); -export let JSChar = llvm.Type.getInt16Ty(); -export let Int1 = llvm.Type.getInt1Ty(); -export let Int32 = llvm.Type.getInt32Ty(); -export let Int64 = llvm.Type.getInt64Ty(); -export let Double = llvm.Type.getDoubleTy(); - -export let EjsLandingPad = llvm.StructType.create("EjsLandingPad", [Int8Pointer, Int32]); -export let EjsValueLayout = llvm.StructType.create("EjsValueType", [Int64]); -export let EjsValue = EjsValueLayout; - -export let EjsClosureEnv = llvm.StructType.create("struct.EJSClosureEnv", [ +export const String = llvm.Type.getInt8Ty().pointerTo(); +export const Int8Pointer = String; +export const Bool = llvm.Type.getInt8Ty(); +export const Void = llvm.Type.getVoidTy(); +export const JSChar = llvm.Type.getInt16Ty(); +export const Int1 = llvm.Type.getInt1Ty(); +export const Int32 = llvm.Type.getInt32Ty(); +export const Int64 = llvm.Type.getInt64Ty(); +export const Double = llvm.Type.getDoubleTy(); + +export const EjsLandingPad = llvm.StructType.create("EjsLandingPad", [Int8Pointer, Int32]); +export const EjsValueLayout = llvm.StructType.create("EjsValueType", [Int64]); +export const EjsValue: llvm.Type = EjsValueLayout; + +export const EjsClosureEnv = llvm.StructType.create("struct.EJSClosureEnv", [ Int32, Int32, llvm.ArrayType.get(EjsValueLayout, 1), ]); -export let EjsPropIterator = EjsValue; -//export let EjsClosureFunc = llvm.FunctionType.get(EjsValue, [EjsValue, EjsValue, Int32, EjsValue.pointerTo()]).pointerTo(); -export let EjsClosureFunc = llvm.FunctionType.get( +export const EjsPropIterator = EjsValue; +export const EjsClosureFunc = llvm.FunctionType.get( Void, [EjsValue.pointerTo(), EjsValue, EjsValue.pointerTo(), Int32, EjsValue.pointerTo(), Int32], EjsValue ).pointerTo(); -export let getEjsClosureFunc = (abi) => + +// the piece of the ABI interface this module needs (abi.ts imports this +// module, so the full type would be a cycle) +export interface FunctionTypeMaker { + createFunctionType(ret: llvm.Type, params: llvm.Type[]): llvm.FunctionType; +} + +export const getEjsClosureFunc = (abi: FunctionTypeMaker): llvm.Type => abi .createFunctionType(EjsValue, [ EjsValue, @@ -40,11 +47,11 @@ export let getEjsClosureFunc = (abi) => ]) .pointerTo(); -export let EjsPrimString = llvm.StructType.create("EjsPrimString", [Int32, Int32, Int64, Int64]); // XXX not the real structure but it should be good +export const EjsPrimString = llvm.StructType.create("EjsPrimString", [Int32, Int32, Int64, Int64]); // XXX not the real structure but it should be good -export let EjsSpecops = llvm.StructType.create("struct.EJSSpecOps", []); // XXX +export const EjsSpecops = llvm.StructType.create("struct.EJSSpecOps", []); // XXX -export let EjsPropertyMap = llvm.StructType.create("struct.EJSPropertyMap", [ +export const EjsPropertyMap = llvm.StructType.create("struct.EJSPropertyMap", [ JSChar.pointerTo(), // _EJSPropertyMapSlot** slots JSChar.pointerTo(), // _EJSPropertyMapSlot* first_insert JSChar.pointerTo(), // _EJSPropertyMapSlot* last_insert @@ -52,11 +59,13 @@ export let EjsPropertyMap = llvm.StructType.create("struct.EJSPropertyMap", [ Int32, // int inuse; ]); -export let EjsObject = null; -export let EjsFunction = null; -export let EjsModule = null; +// initialized by initTypes() once the target's pointer size is known; +// reading them before that is a bug (they trap as undefined at runtime) +export let EjsObject: llvm.StructType; +export let EjsFunction: llvm.StructType; +export let EjsModule: llvm.StructType; -function CreateModuleTy(suffix, num_exports) { +function CreateModuleTy(suffix: string, num_exports: number): llvm.StructType { return llvm.StructType.create(`struct.EJSModule${suffix}`, [ EjsObject, // EJSObject obj; String, // const char* module_name @@ -65,12 +74,12 @@ function CreateModuleTy(suffix, num_exports) { ]); } -export function getModuleSpecificType(module_name, num_exports) { +export function getModuleSpecificType(module_name: string, num_exports: number): llvm.StructType { return CreateModuleTy(`_${module_name}`, num_exports); } -export function initTypes(is32bit) { - // EJSObject's struct type depends no the pointer size of the +export function initTypes(is32bit: boolean): void { + // EJSObject's struct type depends on the pointer size of the // architecture. on 32 bit platforms (XXX or maybe just x86?) // clang inserts 4 bytes of padding at the end. we therefore need // to delay initialization of EJSObject (and therefore its uses) @@ -107,33 +116,33 @@ export function initTypes(is32bit) { // exception types // the c++ typeinfo for our exceptions -export let EjsExceptionTypeInfo = llvm.StructType.create("EjsExceptionTypeInfoType", [ +export const EjsExceptionTypeInfo = llvm.StructType.create("EjsExceptionTypeInfoType", [ Int8Pointer, Int8Pointer, Int8Pointer, ]).pointerTo(); -export function takes_builtins(n) { +export function takes_builtins(n: llvm.EjsFunction): llvm.EjsFunction { n.takes_builtins = true; return n; } -export function only_reads_memory(n) { +export function only_reads_memory(n: llvm.EjsFunction): llvm.EjsFunction { n.setOnlyReadsMemory(); return n; } -export function does_not_access_memory(n) { +export function does_not_access_memory(n: llvm.EjsFunction): llvm.EjsFunction { n.setDoesNotAccessMemory(); return n; } -export function does_not_throw(n) { +export function does_not_throw(n: llvm.EjsFunction): llvm.EjsFunction { n.setDoesNotThrow(); return n; } -export function returns_ejsval_bool(n) { +export function returns_ejsval_bool(n: llvm.EjsFunction): llvm.EjsFunction { n.returns_ejsval_bool = true; return n; } From 49abfaed98c02b0827cb6e7d47fb176307eef9de Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 12:46:28 -0700 Subject: [PATCH 055/146] =?UTF-8?q?ts:=20node-visitor=20=E2=80=94=20typed?= =?UTF-8?q?=20dispatch=20over=20the=20estree=20unions?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The dispatcher's switch narrows the Node discriminated union per case, so every per-type method receives its concrete node type and returns VisitResult (node | node[] | null; null keeps the original, arrays splice in statement lists). The category-preserving assertion lives in exactly one documented place (visitAs) instead of scattered casts. The ...args threading is gone — its only user was HoistFuncDecls' declaration accumulator, which becomes an instance-field stack. Dead dispatch cases (ModuleDeclaration, ClassHeritage, comprehensions) fall to the PANIC default they already effectively had. CompilerOptions moves into lib/options.ts, shared by TransformPass and (eventually) the driver. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/node-visitor.js | 612 -------------------------------- lib/node-visitor.ts | 630 +++++++++++++++++++++++++++++++++ lib/options.ts | 37 ++ lib/passes/hoist-func-decls.js | 36 -- lib/passes/hoist-func-decls.ts | 51 +++ 5 files changed, 718 insertions(+), 648 deletions(-) delete mode 100644 lib/node-visitor.js create mode 100644 lib/node-visitor.ts create mode 100644 lib/options.ts delete mode 100644 lib/passes/hoist-func-decls.js create mode 100644 lib/passes/hoist-func-decls.ts diff --git a/lib/node-visitor.js b/lib/node-visitor.js deleted file mode 100644 index 3d795325..00000000 --- a/lib/node-visitor.js +++ /dev/null @@ -1,612 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -import * as b from "./ast-builder"; - -export class TreeVisitor { - visitArrayKeep(arr, ...args) { - return arr.map((el) => this.visit(el, ...args)); - } - - visitArray(arr, ...args) { - let i = 0; - let e = arr.length; - - while (i < e) { - let tmp = this.visit(arr[i], ...args); - if (!tmp) { - arr.splice(i, 1); - e = arr.length; - } else if (Array.isArray(tmp)) { - let tmplen = tmp.length; - if (tmplen > 0) { - tmp.unshift(1); - tmp.unshift(i); - arr.splice.apply(arr, tmp); - i += tmplen; - e = arr.length; - } else { - arr.splice(i, 1); - e = arr.length; - } - } else { - arr[i] = tmp; - i += 1; - } - } - return arr; - } - - visit(n, ...args) { - if (!n) return n; - if (Array.isArray(n)) return this.visitArray(n, ...args); - - let rv = null; - switch (n.type) { - case b.ArrayExpression: - rv = this.visitArrayExpression(n, ...args); - break; - case b.ArrayPattern: - rv = this.visitArrayPattern(n, ...args); - break; - case b.ArrowFunctionExpression: - rv = this.visitArrowFunctionExpression(n, ...args); - break; - case b.AssignmentExpression: - rv = this.visitAssignmentExpression(n, ...args); - break; - case b.AssignmentPattern: - rv = this.visitAssignmentPattern(n, ...args); - break; - case b.BinaryExpression: - rv = this.visitBinaryExpression(n, ...args); - break; - case b.BlockStatement: - rv = this.visitBlock(n, ...args); - break; - case b.BreakStatement: - rv = this.visitBreak(n, ...args); - break; - case b.CallExpression: - rv = this.visitCallExpression(n, ...args); - break; - case b.CatchClause: - rv = this.visitCatchClause(n, ...args); - break; - case b.ClassBody: - rv = this.visitClassBody(n, ...args); - break; - case b.ClassDeclaration: - rv = this.visitClassDeclaration(n, ...args); - break; - case b.ClassExpression: - rv = this.visitClassExpression(n, ...args); - break; - case b.ClassHeritage: - throw new Error(`Unhandled AST node type: ${n.type}, ${JSON.stringify(n)}`); - case b.ComprehensionBlock: - throw new Error(`Unhandled AST node type: ${n.type}, ${JSON.stringify(n)}`); - case b.ComprehensionExpression: - throw new Error(`Unhandled AST node type: ${n.type}, ${JSON.stringify(n)}`); - case b.ConditionalExpression: - rv = this.visitConditionalExpression(n, ...args); - break; - case b.ContinueStatement: - rv = this.visitContinue(n, ...args); - break; - case b.DebuggerStatement: - rv = n; // compiled as a no-op - break; - case b.DoWhileStatement: - rv = this.visitDo(n, ...args); - break; - case b.EmptyStatement: - rv = this.visitEmptyStatement(n, ...args); - break; - case b.ExportNamedDeclaration: - rv = this.visitExportNamedDeclaration(n, ...args); - break; // XXX jquery esprima - case b.ExportAllDeclaration: - rv = this.visitExportAllDeclaration(n, ...args); - break; // XXX jquery esprima - case b.ExportDefaultDeclaration: - rv = this.visitExportDefaultDeclaration(n, ...args); - break; // XXX jquery esprima - case b.ExpressionStatement: - rv = this.visitExpressionStatement(n, ...args); - break; - case b.ForInStatement: - rv = this.visitForIn(n, ...args); - break; - case b.ForOfStatement: - rv = this.visitForOf(n, ...args); - break; - case b.ForStatement: - rv = this.visitFor(n, ...args); - break; - case b.FunctionDeclaration: - rv = this.visitFunctionDeclaration(n, ...args); - break; - case b.FunctionExpression: - rv = this.visitFunctionExpression(n, ...args); - break; - case b.Identifier: - rv = this.visitIdentifier(n, ...args); - break; - case b.IfStatement: - rv = this.visitIf(n, ...args); - break; - case b.ImportDeclaration: - rv = this.visitImportDeclaration(n, ...args); - break; - case b.ImportSpecifier: - rv = this.visitImportSpecifier(n, ...args); - break; - case b.ImportDefaultSpecifier: - rv = this.visitImportDefaultSpecifier(n, ...args); - break; - case b.ImportNamespaceSpecifier: - rv = this.visitImportNamespaceSpecifier(n, ...args); - break; - case b.LabeledStatement: - rv = this.visitLabeledStatement(n, ...args); - break; - case b.Literal: - rv = this.visitLiteral(n, ...args); - break; - case b.LogicalExpression: - rv = this.visitLogicalExpression(n, ...args); - break; - case b.MemberExpression: - rv = this.visitMemberExpression(n, ...args); - break; - case b.MetaProperty: - rv = this.visitMetaProperty(n, ...args); - break; - case b.MethodDefinition: - rv = this.visitMethodDefinition(n, ...args); - break; - case b.ModuleDeclaration: - rv = this.visitModuleDeclaration(n, ...args); - break; - case b.NewExpression: - rv = this.visitNewExpression(n, ...args); - break; - case b.ObjectExpression: - rv = this.visitObjectExpression(n, ...args); - break; - case b.ObjectPattern: - rv = this.visitObjectPattern(n, ...args); - break; - case b.Program: - rv = this.visitProgram(n, ...args); - break; - case b.Property: - rv = this.visitProperty(n, ...args); - break; - case b.RestElement: - rv = this.visitRestElement(n, ...args); - break; - case b.ReturnStatement: - rv = this.visitReturn(n, ...args); - break; - case b.SequenceExpression: - rv = this.visitSequenceExpression(n, ...args); - break; - case b.SpreadElement: - rv = this.visitSpreadElement(n, ...args); - break; - case b.Super: - rv = this.visitSuper(n, ...args); - break; - case b.SwitchCase: - rv = this.visitCase(n, ...args); - break; - case b.SwitchStatement: - rv = this.visitSwitch(n, ...args); - break; - case b.TaggedTemplateExpression: - rv = this.visitTaggedTemplateExpression(n, ...args); - break; - case b.TemplateElement: - rv = this.visitTemplateElement(n, ...args); - break; - case b.TemplateLiteral: - rv = this.visitTemplateLiteral(n, ...args); - break; - case b.ThisExpression: - rv = this.visitThisExpression(n, ...args); - break; - case b.ThrowStatement: - rv = this.visitThrow(n, ...args); - break; - case b.TryStatement: - rv = this.visitTry(n, ...args); - break; - case b.UnaryExpression: - rv = this.visitUnaryExpression(n, ...args); - break; - case b.UpdateExpression: - rv = this.visitUpdateExpression(n, ...args); - break; - case b.VariableDeclaration: - rv = this.visitVariableDeclaration(n, ...args); - break; - case b.VariableDeclarator: - rv = this.visitVariableDeclarator(n, ...args); - break; - case b.WhileStatement: - rv = this.visitWhile(n, ...args); - break; - case b.WithStatement: - rv = this.visitWith(n, ...args); - break; - case b.YieldExpression: - rv = this.visitYield(n, ...args); - break; - default: - throw new Error(`PANIC: unknown parse node type ${n.type}, ${JSON.stringify(n)}`); - } - - if (rv == null) return n; - return rv; - } - - visitProgram(n, ...args) { - n.body = this.visitArray(n.body, ...args); - return n; - } - - visitFunction(n, ...args) { - n.params = this.visitArray(n.params, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitFunctionDeclaration(n, ...args) { - return this.visitFunction(n, ...args); - } - - visitFunctionExpression(n, ...args) { - return this.visitFunction(n, ...args); - } - - visitArrowFunctionExpression(n, ...args) { - return this.visitFunction(n, ...args); - } - - visitBlock(n, ...args) { - n.body = this.visitArray(n.body, ...args); - return n; - } - - visitEmptyStatement(n) { - return n; - } - - visitExpressionStatement(n, ...args) { - n.expression = this.visit(n.expression, ...args); - return n; - } - - visitSwitch(n, ...args) { - n.discriminant = this.visit(n.discriminant, ...args); - n.cases = this.visitArray(n.cases, ...args); - return n; - } - - visitCase(n, ...args) { - n.test = this.visit(n.test, ...args); - n.consequent = this.visit(n.consequent, ...args); - return n; - } - - visitFor(n, ...args) { - n.init = this.visit(n.init, ...args); - n.test = this.visit(n.test, ...args); - n.update = this.visit(n.update, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitWhile(n, ...args) { - n.test = this.visit(n.test, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitIf(n, ...args) { - n.test = this.visit(n.test, ...args); - n.consequent = this.visit(n.consequent, ...args); - n.alternate = this.visit(n.alternate, ...args); - return n; - } - - visitForIn(n, ...args) { - n.left = this.visit(n.left, ...args); - n.right = this.visit(n.right, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitForOf(n, ...args) { - n.left = this.visit(n.left, ...args); - n.right = this.visit(n.right, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitDo(n, ...args) { - n.body = this.visit(n.body, ...args); - n.test = this.visit(n.test, ...args); - return n; - } - - visitIdentifier(n) { - return n; - } - visitLiteral(n) { - return n; - } - visitThisExpression(n) { - return n; - } - visitBreak(n) { - return n; - } - visitContinue(n) { - return n; - } - - visitTry(n, ...args) { - n.block = this.visit(n.block, ...args); - if (n.handlers) n.handlers = this.visit(n.handlers, ...args); - else n.handlers = null; - n.finalizer = this.visit(n.finalizer, ...args); - return n; - } - - visitCatchClause(n, ...args) { - n.param = this.visit(n.param, ...args); - n.guard = this.visit(n.guard, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitThrow(n, ...args) { - n.argument = this.visit(n.argument, ...args); - return n; - } - - visitRestElement(n) { - return n; - } - - visitReturn(n, ...args) { - n.argument = this.visit(n.argument, ...args); - return n; - } - - visitWith(n, ...args) { - n.object = this.visit(n.object, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitYield(n, ...args) { - n.argument = this.visit(n.argument, ...args); - return n; - } - - visitVariableDeclaration(n, ...args) { - n.declarations = this.visitArray(n.declarations, ...args); - return n; - } - - visitVariableDeclarator(n, ...args) { - n.id = this.visit(n.id, ...args); - n.init = this.visit(n.init, ...args); - return n; - } - - visitLabeledStatement(n, ...args) { - n.label = this.visit(n.label, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitAssignmentExpression(n, ...args) { - n.left = this.visit(n.left, ...args); - n.right = this.visit(n.right, ...args); - return n; - } - - visitConditionalExpression(n, ...args) { - n.test = this.visit(n.test, ...args); - n.consequent = this.visit(n.consequent, ...args); - n.alternate = this.visit(n.alternate, ...args); - return n; - } - - visitLogicalExpression(n, ...args) { - n.left = this.visit(n.left, ...args); - n.right = this.visit(n.right, ...args); - return n; - } - - visitBinaryExpression(n, ...args) { - n.left = this.visit(n.left, ...args); - n.right = this.visit(n.right, ...args); - return n; - } - - visitUnaryExpression(n, ...args) { - n.argument = this.visit(n.argument, ...args); - return n; - } - - visitUpdateExpression(n, ...args) { - n.argument = this.visit(n.argument, ...args); - return n; - } - - visitMemberExpression(n, ...args) { - n.object = this.visit(n.object, ...args); - if (n.computed) n.property = this.visit(n.property, ...args); - return n; - } - - visitSequenceExpression(n, ...args) { - n.expressions = this.visitArray(n.expressions, ...args); - return n; - } - - visitSuper(n) { - return n; - } - - visitSpreadElement(n, ...args) { - n.argument = this.visit(n.argument, ...args); - return n; - } - - visitNewExpression(n, ...args) { - n.callee = this.visit(n.callee, ...args); - n.arguments = this.visitArray(n.arguments, ...args); - return n; - } - - visitObjectExpression(n, ...args) { - n.properties = this.visitArray(n.properties, ...args); - return n; - } - - visitArrayExpression(n, ...args) { - // esprima encodes holes in the array as 'null' elements in - // n.elements, so we can't use visitArray. instead iterate - // over the elements manually. - n.elements = this.visitArrayKeep(n.elements, ...args); - return n; - } - - visitProperty(n, ...args) { - n.key = this.visit(n.key, ...args); - n.value = this.visit(n.value, ...args); - return n; - } - - visitCallExpression(n, ...args) { - n.callee = this.visit(n.callee, ...args); - n.arguments = this.visitArray(n.arguments, ...args); - return n; - } - - visitClassDeclaration(n, ...args) { - return this.visitClass(n, ...args); - } - - visitClassExpression(n, ...args) { - return this.visitClass(n, ...args); - } - - visitClass(n, ...args) { - n.body = this.visit(n.body, ...args); - return n; - } - - visitClassBody(n, ...args) { - n.body = this.visitArray(n.body, ...args); - return n; - } - - visitMetaProperty(n) { - return n; - } - - visitMethodDefinition(n, ...args) { - n.value = this.visit(n.value, ...args); - return n; - } - - visitModuleDeclaration(n, ...args) { - n.id = this.visit(n.id, ...args); - n.body = this.visit(n.body, ...args); - return n; - } - - visitExportDefaultDeclaration(n, ...args) { - n.declaration = this.visit(n.declaration, ...args); - return n; - } - - visitExportNamedDeclaration(n, ...args) { - n.declaration = this.visit(n.declaration, ...args); - // XXX specifiers? - return n; - } - - visitExportAllDeclaration(n) { - return n; - } - - visitImportDeclaration(n, ...args) { - n.specifiers = this.visitArray(n.specifiers, ...args); - return n; - } - - visitImportSpecifier(n, ...args) { - n.imported = this.visit(n.imported, ...args); - return n; - } - - visitImportDefaultSpecifier(n) { - return n; - } - - visitImportNamespaceSpecifier(n) { - return n; - } - - visitArrayPattern(n, ...args) { - n.elements = this.visitArrayKeep(n.elements, ...args); - return n; - } - - visitAssignmentPattern(n, ...args) { - // the left side is a binding pattern, not a reference - n.right = this.visit(n.right, ...args); - return n; - } - - visitObjectPattern(n, ...args) { - n.properties = this.visitArray(n.properties, ...args); - return n; - } - - visitTaggedTemplateExpression(n, ...args) { - n.quasi = this.visit(n.quasi, ...args); - return n; - } - - visitTemplateLiteral(n, ...args) { - n.quasis = this.visitArray(n.quasis, ...args); - n.expressions = this.visitArray(n.expressions, ...args); - return n; - } - - visitTemplateElement(n) { - return n; - } - - toString() { - return "TreeVisitor"; - } -} - -export class TransformPass extends TreeVisitor { - constructor(options) { - super(); - this.options = options; - } -} diff --git a/lib/node-visitor.ts b/lib/node-visitor.ts new file mode 100644 index 00000000..bdc9c8f6 --- /dev/null +++ b/lib/node-visitor.ts @@ -0,0 +1,630 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// The AST walker/transformer base. visit() dispatches on node type to a +// per-type method; a method returning null/undefined keeps the original +// node, returning a node replaces it, and (inside statement/expression +// lists) returning an array splices. +// +// Transformers must preserve the syntactic category of the slot they +// return into (an expression position must get back an expression, ...). +// That contract is asserted in exactly one place — visitAs — rather than +// scattered casts; violations surface downstream in lowering, which +// whitelists what it understands. + +import * as b from "./ast-builder"; +import type * as e from "./estree"; +import type { CompilerOptions } from "./options"; + +export type VisitResult = e.Node | e.Node[] | null | undefined; + +export class TreeVisitor { + // the category-preserving cast (see the module comment) + protected visitAs(n: T | null | undefined): T { + return this.visit(n) as T; + } + + protected visitNullable(n: T | null): T | null { + if (!n) return n; + return this.visit(n) as T; + } + + visitArrayKeep(arr: (T | null)[]): (T | null)[] { + return arr.map((el) => (el === null ? null : (this.visit(el) as T))); + } + + // in-place transform of a node list: a falsy result removes the + // element, an array result splices its elements in + visitArray(arr: T[]): T[] { + let i = 0; + let end = arr.length; + + while (i < end) { + const tmp = this.visit(arr[i]) as T | T[] | null | undefined; + if (!tmp) { + arr.splice(i, 1); + end = arr.length; + } else if (Array.isArray(tmp)) { + arr.splice(i, 1, ...tmp); + i += tmp.length; + end = arr.length; + } else { + arr[i] = tmp; + i += 1; + } + } + return arr; + } + + visit(n: e.Node | e.Node[] | null | undefined): VisitResult { + if (!n) return n; + if (Array.isArray(n)) return this.visitArray(n); + + let rv: VisitResult = null; + switch (n.type) { + case "ArrayExpression": + rv = this.visitArrayExpression(n); + break; + case "ArrayPattern": + rv = this.visitArrayPattern(n); + break; + case "ArrowFunctionExpression": + rv = this.visitArrowFunctionExpression(n); + break; + case "AssignmentExpression": + rv = this.visitAssignmentExpression(n); + break; + case "AssignmentPattern": + rv = this.visitAssignmentPattern(n); + break; + case "BinaryExpression": + rv = this.visitBinaryExpression(n); + break; + case "BlockStatement": + rv = this.visitBlock(n); + break; + case "BreakStatement": + rv = this.visitBreak(n); + break; + case "CallExpression": + rv = this.visitCallExpression(n); + break; + case "CatchClause": + rv = this.visitCatchClause(n); + break; + case "ClassBody": + rv = this.visitClassBody(n); + break; + case "ClassDeclaration": + rv = this.visitClassDeclaration(n); + break; + case "ClassExpression": + rv = this.visitClassExpression(n); + break; + case "ConditionalExpression": + rv = this.visitConditionalExpression(n); + break; + case "ContinueStatement": + rv = this.visitContinue(n); + break; + case "DebuggerStatement": + rv = n; // compiled as a no-op + break; + case "DoWhileStatement": + rv = this.visitDo(n); + break; + case "EmptyStatement": + rv = this.visitEmptyStatement(n); + break; + case "ExportNamedDeclaration": + rv = this.visitExportNamedDeclaration(n); + break; + case "ExportAllDeclaration": + rv = this.visitExportAllDeclaration(n); + break; + case "ExportDefaultDeclaration": + rv = this.visitExportDefaultDeclaration(n); + break; + case "ExportSpecifier": + rv = this.visitExportSpecifier(n); + break; + case "ExpressionStatement": + rv = this.visitExpressionStatement(n); + break; + case "ForInStatement": + rv = this.visitForIn(n); + break; + case "ForOfStatement": + rv = this.visitForOf(n); + break; + case "ForStatement": + rv = this.visitFor(n); + break; + case "FunctionDeclaration": + rv = this.visitFunctionDeclaration(n); + break; + case "FunctionExpression": + rv = this.visitFunctionExpression(n); + break; + case "Identifier": + rv = this.visitIdentifier(n); + break; + case "IfStatement": + rv = this.visitIf(n); + break; + case "ImportDeclaration": + rv = this.visitImportDeclaration(n); + break; + case "ImportSpecifier": + rv = this.visitImportSpecifier(n); + break; + case "ImportDefaultSpecifier": + rv = this.visitImportDefaultSpecifier(n); + break; + case "ImportNamespaceSpecifier": + rv = this.visitImportNamespaceSpecifier(n); + break; + case "LabeledStatement": + rv = this.visitLabeledStatement(n); + break; + case "Literal": + rv = this.visitLiteral(n); + break; + case "LogicalExpression": + rv = this.visitLogicalExpression(n); + break; + case "MemberExpression": + rv = this.visitMemberExpression(n); + break; + case "MetaProperty": + rv = this.visitMetaProperty(n); + break; + case "MethodDefinition": + rv = this.visitMethodDefinition(n); + break; + case "NewExpression": + rv = this.visitNewExpression(n); + break; + case "ObjectExpression": + rv = this.visitObjectExpression(n); + break; + case "ObjectPattern": + rv = this.visitObjectPattern(n); + break; + case "Program": + rv = this.visitProgram(n); + break; + case "Property": + rv = this.visitProperty(n); + break; + case "RestElement": + rv = this.visitRestElement(n); + break; + case "ReturnStatement": + rv = this.visitReturn(n); + break; + case "SequenceExpression": + rv = this.visitSequenceExpression(n); + break; + case "SpreadElement": + rv = this.visitSpreadElement(n); + break; + case "Super": + rv = this.visitSuper(n); + break; + case "SwitchCase": + rv = this.visitCase(n); + break; + case "SwitchStatement": + rv = this.visitSwitch(n); + break; + case "TaggedTemplateExpression": + rv = this.visitTaggedTemplateExpression(n); + break; + case "TemplateElement": + rv = this.visitTemplateElement(n); + break; + case "TemplateLiteral": + rv = this.visitTemplateLiteral(n); + break; + case "ThisExpression": + rv = this.visitThisExpression(n); + break; + case "ThrowStatement": + rv = this.visitThrow(n); + break; + case "TryStatement": + rv = this.visitTry(n); + break; + case "UnaryExpression": + rv = this.visitUnaryExpression(n); + break; + case "UpdateExpression": + rv = this.visitUpdateExpression(n); + break; + case "VariableDeclaration": + rv = this.visitVariableDeclaration(n); + break; + case "VariableDeclarator": + rv = this.visitVariableDeclarator(n); + break; + case "WhileStatement": + rv = this.visitWhile(n); + break; + case "WithStatement": + rv = this.visitWith(n); + break; + case "YieldExpression": + rv = this.visitYield(n); + break; + default: + throw new Error( + `PANIC: unknown parse node type ${(n as e.Node).type}, ${JSON.stringify(n)}` + ); + } + + if (rv == null) return n; + return rv; + } + + visitProgram(n: e.Program): VisitResult { + n.body = this.visitArray(n.body); + return n; + } + + visitFunction(n: e.Function): VisitResult { + n.params = this.visitArray(n.params); + n.body = this.visitAs(n.body); + return n; + } + + visitFunctionDeclaration(n: e.FunctionDeclaration): VisitResult { + return this.visitFunction(n); + } + + visitFunctionExpression(n: e.FunctionExpression): VisitResult { + return this.visitFunction(n); + } + + visitArrowFunctionExpression(n: e.ArrowFunctionExpression): VisitResult { + return this.visitFunction(n); + } + + visitBlock(n: e.BlockStatement): VisitResult { + n.body = this.visitArray(n.body); + return n; + } + + visitEmptyStatement(n: e.EmptyStatement): VisitResult { + return n; + } + + visitExpressionStatement(n: e.ExpressionStatement): VisitResult { + n.expression = this.visitAs(n.expression); + return n; + } + + visitSwitch(n: e.SwitchStatement): VisitResult { + n.discriminant = this.visitAs(n.discriminant); + n.cases = this.visitArray(n.cases); + return n; + } + + visitCase(n: e.SwitchCase): VisitResult { + n.test = this.visitNullable(n.test); + n.consequent = this.visitArray(n.consequent); + return n; + } + + visitFor(n: e.ForStatement): VisitResult { + n.init = this.visitNullable(n.init); + n.test = this.visitNullable(n.test); + n.update = this.visitNullable(n.update); + n.body = this.visitAs(n.body); + return n; + } + + visitWhile(n: e.WhileStatement): VisitResult { + n.test = this.visitAs(n.test); + n.body = this.visitAs(n.body); + return n; + } + + visitIf(n: e.IfStatement): VisitResult { + n.test = this.visitAs(n.test); + n.consequent = this.visitAs(n.consequent); + n.alternate = this.visitNullable(n.alternate); + return n; + } + + visitForIn(n: e.ForInStatement): VisitResult { + n.left = this.visitAs(n.left); + n.right = this.visitAs(n.right); + n.body = this.visitAs(n.body); + return n; + } + + visitForOf(n: e.ForOfStatement): VisitResult { + n.left = this.visitAs(n.left); + n.right = this.visitAs(n.right); + n.body = this.visitAs(n.body); + return n; + } + + visitDo(n: e.DoWhileStatement): VisitResult { + n.body = this.visitAs(n.body); + n.test = this.visitAs(n.test); + return n; + } + + visitIdentifier(n: e.Identifier): VisitResult { + return n; + } + + visitLiteral(n: e.Literal): VisitResult { + return n; + } + + visitThisExpression(n: e.ThisExpression): VisitResult { + return n; + } + + visitBreak(n: e.BreakStatement): VisitResult { + return n; + } + + visitContinue(n: e.ContinueStatement): VisitResult { + return n; + } + + visitTry(n: e.TryStatement): VisitResult { + n.block = this.visitAs(n.block); + if (n.handlers) n.handlers = this.visitArray(n.handlers); + n.finalizer = this.visitNullable(n.finalizer); + return n; + } + + visitCatchClause(n: e.CatchClause): VisitResult { + n.param = this.visitAs(n.param); + n.guard = this.visitNullable(n.guard); + n.body = this.visitAs(n.body); + return n; + } + + visitThrow(n: e.ThrowStatement): VisitResult { + n.argument = this.visitAs(n.argument); + return n; + } + + visitRestElement(n: e.RestElement): VisitResult { + return n; + } + + visitReturn(n: e.ReturnStatement): VisitResult { + n.argument = this.visitNullable(n.argument); + return n; + } + + visitWith(n: e.WithStatement): VisitResult { + n.object = this.visitAs(n.object); + n.body = this.visitAs(n.body); + return n; + } + + visitYield(n: e.YieldExpression): VisitResult { + n.argument = this.visitNullable(n.argument); + return n; + } + + visitVariableDeclaration(n: e.VariableDeclaration): VisitResult { + n.declarations = this.visitArray(n.declarations); + return n; + } + + visitVariableDeclarator(n: e.VariableDeclarator): VisitResult { + n.id = this.visitAs(n.id); + if (n.init) n.init = this.visitAs(n.init); + return n; + } + + visitLabeledStatement(n: e.LabeledStatement): VisitResult { + n.label = this.visitAs(n.label); + n.body = this.visitAs(n.body); + return n; + } + + visitAssignmentExpression(n: e.AssignmentExpression): VisitResult { + n.left = this.visitAs(n.left); + n.right = this.visitAs(n.right); + return n; + } + + visitConditionalExpression(n: e.ConditionalExpression): VisitResult { + n.test = this.visitAs(n.test); + n.consequent = this.visitAs(n.consequent); + n.alternate = this.visitAs(n.alternate); + return n; + } + + visitLogicalExpression(n: e.LogicalExpression): VisitResult { + n.left = this.visitAs(n.left); + n.right = this.visitAs(n.right); + return n; + } + + visitBinaryExpression(n: e.BinaryExpression): VisitResult { + n.left = this.visitAs(n.left); + n.right = this.visitAs(n.right); + return n; + } + + visitUnaryExpression(n: e.UnaryExpression): VisitResult { + n.argument = this.visitAs(n.argument); + return n; + } + + visitUpdateExpression(n: e.UpdateExpression): VisitResult { + n.argument = this.visitAs(n.argument); + return n; + } + + visitMemberExpression(n: e.MemberExpression): VisitResult { + n.object = this.visitAs(n.object); + if (n.computed) n.property = this.visitAs(n.property); + return n; + } + + visitSequenceExpression(n: e.SequenceExpression): VisitResult { + n.expressions = this.visitArray(n.expressions); + return n; + } + + visitSuper(n: e.Super): VisitResult { + return n; + } + + visitSpreadElement(n: e.SpreadElement): VisitResult { + n.argument = this.visitAs(n.argument); + return n; + } + + visitNewExpression(n: e.NewExpression): VisitResult { + n.callee = this.visitAs(n.callee); + n.arguments = this.visitArray(n.arguments); + return n; + } + + visitObjectExpression(n: e.ObjectExpression): VisitResult { + n.properties = this.visitArray(n.properties); + return n; + } + + visitArrayExpression(n: e.ArrayExpression): VisitResult { + // esprima encodes holes in the array as 'null' elements in + // n.elements, so we can't use visitArray. instead iterate + // over the elements manually. + n.elements = this.visitArrayKeep(n.elements); + return n; + } + + visitProperty(n: e.Property): VisitResult { + n.key = this.visitAs(n.key); + n.value = this.visitAs(n.value); + return n; + } + + visitCallExpression(n: e.CallExpression): VisitResult { + n.callee = this.visitAs(n.callee); + n.arguments = this.visitArray(n.arguments); + return n; + } + + visitClassDeclaration(n: e.ClassDeclaration): VisitResult { + return this.visitClass(n); + } + + visitClassExpression(n: e.ClassExpression): VisitResult { + return this.visitClass(n); + } + + visitClass(n: e.Class): VisitResult { + n.body = this.visitAs(n.body); + return n; + } + + visitClassBody(n: e.ClassBody): VisitResult { + n.body = this.visitArray(n.body); + return n; + } + + visitMetaProperty(n: e.MetaProperty): VisitResult { + return n; + } + + visitMethodDefinition(n: e.MethodDefinition): VisitResult { + n.value = this.visitAs(n.value); + return n; + } + + visitExportDefaultDeclaration(n: e.ExportDefaultDeclaration): VisitResult { + n.declaration = this.visitAs(n.declaration); + return n; + } + + visitExportNamedDeclaration(n: e.ExportNamedDeclaration): VisitResult { + n.declaration = this.visitNullable(n.declaration); + // XXX specifiers? + return n; + } + + visitExportAllDeclaration(n: e.ExportAllDeclaration): VisitResult { + return n; + } + + visitExportSpecifier(n: e.ExportSpecifier): VisitResult { + return n; + } + + visitImportDeclaration(n: e.ImportDeclaration): VisitResult { + n.specifiers = this.visitArray(n.specifiers); + return n; + } + + visitImportSpecifier(n: e.ImportSpecifier): VisitResult { + n.imported = this.visitAs(n.imported); + return n; + } + + visitImportDefaultSpecifier(n: e.ImportDefaultSpecifier): VisitResult { + return n; + } + + visitImportNamespaceSpecifier(n: e.ImportNamespaceSpecifier): VisitResult { + return n; + } + + visitArrayPattern(n: e.ArrayPattern): VisitResult { + n.elements = this.visitArrayKeep(n.elements); + return n; + } + + visitAssignmentPattern(n: e.AssignmentPattern): VisitResult { + // the left side is a binding pattern, not a reference + n.right = this.visitAs(n.right); + return n; + } + + visitObjectPattern(n: e.ObjectPattern): VisitResult { + n.properties = this.visitArray(n.properties); + return n; + } + + visitTaggedTemplateExpression(n: e.TaggedTemplateExpression): VisitResult { + n.quasi = this.visitAs(n.quasi); + return n; + } + + visitTemplateLiteral(n: e.TemplateLiteral): VisitResult { + n.quasis = this.visitArray(n.quasis); + n.expressions = this.visitArray(n.expressions); + return n; + } + + visitTemplateElement(n: e.TemplateElement): VisitResult { + return n; + } + + toString(): string { + return "TreeVisitor"; + } +} + +export class TransformPass extends TreeVisitor { + options: CompilerOptions; + + constructor(options: CompilerOptions) { + super(); + this.options = options; + } +} diff --git a/lib/options.ts b/lib/options.ts new file mode 100644 index 00000000..523d6a07 --- /dev/null +++ b/lib/options.ts @@ -0,0 +1,37 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// The driver's options object (defaults live in ejs-es6.ts). The passes +// and the compiler consume slices of this; it is threaded everywhere. + +export interface ImportVariable { + variable: string; + value: string; +} + +export interface OutputWriter { + write(msg: string, want_newline?: boolean): void; +} + +export interface CompilerOptions { + opt_level: number; + debug: boolean; + debug_level: number; + debug_passes: Set; + warn_on_undeclared: boolean; + frozen_global: boolean; + record_types: boolean; + output_filename: string | null; + show_help: boolean; + leave_temp_files: boolean; + native_module_dirs: string[]; + extra_clang_args: string; + ios_sdk: string; + ios_min: string; + osx_min: string; + import_variables: ImportVariable[]; + srcdir: boolean; + stdout_writer: OutputWriter; + quiet?: boolean; +} diff --git a/lib/passes/hoist-func-decls.js b/lib/passes/hoist-func-decls.js deleted file mode 100644 index ce37bebf..00000000 --- a/lib/passes/hoist-func-decls.js +++ /dev/null @@ -1,36 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -import { TransformPass } from "../node-visitor"; - -import * as b from "../ast-builder"; - -export class HoistFuncDecls extends TransformPass { - visitFunction(n) { - let decls = new Map(); - n.body = this.visit(n.body, decls); - decls.forEach((fd) => { - n.body.body.unshift(fd); - }); - return n; - } - - visitBlock(n, decls) { - if (n.body.length === 0) return n; - - let i = 0; - let e = n.body.length; - while (i < e) { - let child = n.body[i]; - if (child.type === b.FunctionDeclaration) { - decls.set(child.id.name, this.visit(child)); - n.body.splice(i, 1); - e = n.body.length; - } else { - i++; - } - } - n = super.visitBlock(n, decls); - return n; - } -} diff --git a/lib/passes/hoist-func-decls.ts b/lib/passes/hoist-func-decls.ts new file mode 100644 index 00000000..ff11ce28 --- /dev/null +++ b/lib/passes/hoist-func-decls.ts @@ -0,0 +1,51 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// v8 semantics for function declarations: block-level declarations hoist +// to function scope, and same-name redeclarations collapse to the last +// one (the Map keying below). + +import { TransformPass, VisitResult } from "../node-visitor"; +import type * as e from "../estree"; + +export class HoistFuncDecls extends TransformPass { + // the current function's hoisted declarations; a stack because + // functions nest (visitFunction saves/restores around the recursion) + private decls: Map | null = null; + + override visitFunction(n: e.Function): VisitResult { + const saved = this.decls; + const decls = new Map(); + this.decls = decls; + n.body = this.visitAs(n.body); + this.decls = saved; + if (n.body.type === "BlockStatement") { + const body = n.body.body; + decls.forEach((fd) => { + body.unshift(fd); + }); + } + return n; + } + + override visitBlock(n: e.BlockStatement): VisitResult { + if (n.body.length === 0) return n; + const decls = this.decls; + if (!decls) return super.visitBlock(n); + + let i = 0; + let end = n.body.length; + while (i < end) { + const child = n.body[i]!; + if (child.type === "FunctionDeclaration") { + decls.set(child.id.name, this.visitAs(child)); + n.body.splice(i, 1); + end = n.body.length; + } else { + i++; + } + } + return super.visitBlock(n); + } +} From c0219f03cd1bfb67a3985ca911317df005adaf6d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 16:21:56 -0700 Subject: [PATCH 056/146] fix: the arguments object choked on symbol keys (latent bug #28) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit _ejs_arguments_specop_get and _has_property ran every property key through ToNumber to detect indices — a Symbol key (in particular @@iterator, which every spread of `arguments` looks up) made ToNumber throw a TypeError, so `[...arguments]` and tsc's synthesized `constructor() { super(...arguments); }` both died at runtime. The node-visitor port surfaced it: HoistFuncDecls gained a class field, tsc synthesized the spreading constructor, and every stage1-compiled compile of nontrivial input failed with "TypeError: 1" while stage0 (node-hosted) stayed green. Symbol keys now delegate straight to the ordinary property map (where the @@iterator the constructor installs actually lives). Also fixed while in there: the index bounds check read args[argc] (off-by-one OOB) and a stray debug printf on misses. HoistFuncDecls gets an explicit constructor too — the compiler shouldn't gratuitously depend on the runtime behavior it just fixed while bootstrapping through older binaries. Regression test: arguments6.js (spread of arguments in calls/arrays, the super(...arguments) subclass shape, symbol-keyed reads, reads past argc). Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/passes/hoist-func-decls.ts | 10 +++++++++ runtime/ejs-arguments.c | 10 +++++++-- test/arguments6.js | 41 ++++++++++++++++++++++++++++++++++ 3 files changed, 59 insertions(+), 2 deletions(-) create mode 100644 test/arguments6.js diff --git a/lib/passes/hoist-func-decls.ts b/lib/passes/hoist-func-decls.ts index ff11ce28..fb2d439f 100644 --- a/lib/passes/hoist-func-decls.ts +++ b/lib/passes/hoist-func-decls.ts @@ -8,12 +8,22 @@ import { TransformPass, VisitResult } from "../node-visitor"; import type * as e from "../estree"; +import type { CompilerOptions } from "../options"; export class HoistFuncDecls extends TransformPass { // the current function's hoisted declarations; a stack because // functions nest (visitFunction saves/restores around the recursion) private decls: Map | null = null; + // explicit, so tsc doesn't synthesize `constructor() { + // super(...arguments); }` — spreading `arguments` used to trip a + // runtime bug (the arguments object's specops ToNumber'd Symbol + // keys, so the @@iterator lookup threw; fixed in ejs-arguments.c, + // but the compiler shouldn't gratuitously depend on it either) + constructor(options: CompilerOptions) { + super(options); + } + override visitFunction(n: e.Function): VisitResult { const saved = this.decls; const decls = new Map(); diff --git a/runtime/ejs-arguments.c b/runtime/ejs-arguments.c index c214c5f5..1d5a1c42 100644 --- a/runtime/ejs-arguments.c +++ b/runtime/ejs-arguments.c @@ -75,6 +75,10 @@ _ejs_arguments_specop_get (ejsval obj, ejsval propertyName, ejsval receiver) { EJSArguments* arguments = EJSVAL_TO_ARGUMENTS(obj); + // symbol keys (@@iterator in particular — spreading `arguments` + // looks it up) can never be indices, and ToNumber on a symbol + // throws; they live in the ordinary property map + if (!EJSVAL_IS_SYMBOL(propertyName)) { // check if propertyName is an integer, or a string that we can convert to an int EJSBool is_index = EJS_FALSE; ejsval idx_val = ToNumber(propertyName); @@ -88,12 +92,12 @@ _ejs_arguments_specop_get (ejsval obj, ejsval propertyName, ejsval receiver) } if (is_index) { - if (idx < 0 || idx > arguments->argc) { - printf ("getprop(%d) on an arguments, returning undefined\n", idx); + if (idx < 0 || idx >= arguments->argc) { return _ejs_undefined; } return arguments->args[idx]; } + } // we also handle the length getter here if (EJSVAL_IS_STRING(propertyName) && !ucs2_strcmp (_ejs_ucs2_length, EJSVAL_TO_FLAT_STRING(propertyName))) { @@ -108,6 +112,8 @@ static EJSBool _ejs_arguments_specop_has_property (ejsval obj, ejsval propertyName) { EJSArguments* arguments = (EJSArguments*)EJSVAL_TO_OBJECT(obj); + if (EJSVAL_IS_SYMBOL(propertyName)) + return _ejs_Object_specops.HasProperty (obj, propertyName); // check if propertyName is an integer, or a string that we can convert to an int ejsval idx_val = ToNumber(propertyName); int idx; diff --git a/test/arguments6.js b/test/arguments6.js new file mode 100644 index 00000000..2c58cf3f --- /dev/null +++ b/test/arguments6.js @@ -0,0 +1,41 @@ +// the arguments object is iterable (@@iterator = %ArrayProto_values%), +// and its specops must not ToNumber symbol keys — spreading `arguments` +// used to throw a TypeError from the @@iterator lookup. the +// `super(...arguments)` shape is what tsc synthesizes for field-bearing +// subclasses without explicit constructors. + +function spread() { + return [...arguments].join(","); +} +console.log(spread(1, 2, 3)); + +function viaCall() { + return Math.max(...arguments); +} +console.log(viaCall(4, 9, 2)); + +class A { + constructor(x, y) { + this.sum = x + y; + } +} +class B extends A { + constructor() { + super(...arguments); + this.tagged = true; + } +} +let b = new B(20, 22); +console.log(b.sum, b.tagged); + +// symbol-keyed reads on arguments delegate to the property map +function symprobe() { + return typeof arguments[Symbol.iterator]; +} +console.log(symprobe()); + +// index reads at and past argc are undefined, not garbage +function edge(a) { + return [arguments[0], arguments[1], arguments[2]].join(","); +} +console.log(edge(5)); From 2938bb6a60fdf9c3bcf6b288238dde68938761f3 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 17:02:53 -0700 Subject: [PATCH 057/146] =?UTF-8?q?ts:=20desugar=20passes=20=E2=80=94=20me?= =?UTF-8?q?taproperties,=20spread,=20generator-functions?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit DesugarMetaProperties records the dialect fact that the esprima fork stores raw NAMES in MetaProperty.meta/.property (estree.ts and the builder now say so; the string comparisons were always correct). TransformPass finally stores the filename it has always been handed — the desugars' reportError calls had been passing undefined. DesugarSpread's three chunking loops collapse into one spreadChunks + holeToUndefined; behavior preserved exactly, including the flatten paths' hole handling. DesugarGeneratorFunctions keeps the wrapper shape verbatim (the %gen let-declaration reuses the mapping node, which the node-keyed refs machinery depends on); bare `yield;` now yields undefined instead of crashing the builder. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/ast-builder.ts | 2 +- lib/estree.ts | 6 +- lib/node-visitor.ts | 4 +- lib/passes/desugar-generator-functions.js | 124 ----------- lib/passes/desugar-generator-functions.ts | 124 +++++++++++ ...roperties.js => desugar-metaproperties.ts} | 18 +- lib/passes/desugar-spread.js | 203 ------------------ lib/passes/desugar-spread.ts | 139 ++++++++++++ 8 files changed, 280 insertions(+), 340 deletions(-) delete mode 100644 lib/passes/desugar-generator-functions.js create mode 100644 lib/passes/desugar-generator-functions.ts rename lib/passes/{desugar-metaproperties.js => desugar-metaproperties.ts} (60%) delete mode 100644 lib/passes/desugar-spread.js create mode 100644 lib/passes/desugar-spread.ts diff --git a/lib/ast-builder.ts b/lib/ast-builder.ts index 47259c4b..eff79e1f 100644 --- a/lib/ast-builder.ts +++ b/lib/ast-builder.ts @@ -261,7 +261,7 @@ export function memberExpression( return { type: MemberExpression, object: obj, property: prop, computed }; } -export function metaProperty(meta: e.Identifier, property: e.Identifier): e.MetaProperty { +export function metaProperty(meta: string, property: string): e.MetaProperty { return { type: MetaProperty, meta, property }; } diff --git a/lib/estree.ts b/lib/estree.ts index 4a216282..d6708c64 100644 --- a/lib/estree.ts +++ b/lib/estree.ts @@ -215,8 +215,10 @@ export interface Super extends BaseNode { export interface MetaProperty extends BaseNode { type: "MetaProperty"; - meta: Identifier; - property: Identifier; + // dialect: the esprima fork stores the raw NAMES here, not + // Identifier nodes + meta: string; + property: string; } // --- patterns --------------------------------------------------------------- diff --git a/lib/node-visitor.ts b/lib/node-visitor.ts index bdc9c8f6..964fe494 100644 --- a/lib/node-visitor.ts +++ b/lib/node-visitor.ts @@ -622,9 +622,11 @@ export class TreeVisitor { export class TransformPass extends TreeVisitor { options: CompilerOptions; + filename: string; - constructor(options: CompilerOptions) { + constructor(options: CompilerOptions, filename?: string) { super(); this.options = options; + this.filename = filename ?? ""; } } diff --git a/lib/passes/desugar-generator-functions.js b/lib/passes/desugar-generator-functions.js deleted file mode 100644 index 114b4f3a..00000000 --- a/lib/passes/desugar-generator-functions.js +++ /dev/null @@ -1,124 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ -// this pass converts all generator functions like this: -// -// function* foo() { -// yield 1; -// yield 2; -// yield 3; -// } -// -// into this: -// -// function foo() { -// // arrow function so `this` is bound -// let %gen = %makeGenerator(() => { -// %generatorYield(%gen, 1); -// %generatorYield(%gen, 2); -// %generatorYield(%gen, 3); -// } -// return %gen; -// } -// - -import { TransformPass } from "../node-visitor"; -import * as b from "../ast-builder"; -import { - makeGenerator_id, - generatorYield_id, - generatorIsReturnSentinel_id, - generatorReturnValue_id, -} from "../common-ids"; -import { intrinsic, startGenerator } from "../echo-util"; -import { reportError, reportWarning } from "../errors"; - -export class DesugarGeneratorFunctions extends TransformPass { - constructor(options) { - super(options); - this.mapping = []; - this.genGen = startGenerator(); - this.yieldGen = startGenerator(); - } - - visitFunction(n) { - if (n.generator) this.mapping.unshift(b.identifier(`%_gen_${this.genGen()}`)); - n = super.visitFunction(n); - if (n.generator) { - // the body wraps in a catch that converts the runtime's - // .return() sentinel into a normal return: gen.return(v) - // resumes the suspended yield by throwing the sentinel, so - // finally blocks run, and this outermost catch completes the - // generator with v (see _ejs_Generator_prototype_return) - let exc_id = b.identifier(`%_genexc_${this.genGen()}`); - let old_body = b.blockStatement([ - b.tryStatement( - n.body, - [b.catchClause( - exc_id, - b.blockStatement([ - b.ifStatement( - intrinsic(generatorIsReturnSentinel_id, [b.identifier(exc_id.name)]), - b.returnStatement( - intrinsic(generatorReturnValue_id, [ - b.identifier(this.mapping[0].name), - ]) - ), - b.throwStatement(b.identifier(exc_id.name)) - ), - ]) - )], - null - ), - ]); - n.body = b.blockStatement([ - b.letDeclaration( - this.mapping[0], - intrinsic(makeGenerator_id, [b.arrowFunctionExpression([], old_body)]) - ), - b.returnStatement(this.mapping[0]), - ]); - n.generator = false; - } - this.mapping.shift(); - return n; - } - - // yield* x → for (let %_yield of x) %generatorYield(%gen, %_yield); - // (n.argument must already be visited) - delegateLoop(n) { - let yield_id = b.identifier(`%_yield_${this.genGen()}`); - return b.forOfStatement( - b.letDeclaration(yield_id, null), - n.argument, - b.blockStatement([ - b.expressionStatement( - intrinsic(generatorYield_id, [this.mapping[0], yield_id]) - ), - ]) - ); - } - - // statement-position yield* replaces the whole ExpressionStatement - // with the for-of loop, keeping the AST well-formed. (grafting the - // loop into the expression slot — what the expression-position case - // in visitYield still produces — only works because the legacy - // visitors don't distinguish statements from expressions; EIR falls - // back on that shape.) - visitExpressionStatement(n) { - if (n.expression.type === b.YieldExpression && n.expression.delegate) { - n.expression.argument = this.visit(n.expression.argument); - return this.delegateLoop(n.expression); - } - return super.visitExpressionStatement(n); - } - - visitYield(n) { - n.argument = this.visit(n.argument); - if (n.delegate) { - return this.delegateLoop(n); - } else { - return intrinsic(generatorYield_id, [this.mapping[0], n.argument]); - } - } -} diff --git a/lib/passes/desugar-generator-functions.ts b/lib/passes/desugar-generator-functions.ts new file mode 100644 index 00000000..7bfe32ec --- /dev/null +++ b/lib/passes/desugar-generator-functions.ts @@ -0,0 +1,124 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// coroutine-style generator desugar: +// +// function* gen() { +// yield 1; +// yield 2; +// yield 3; +// } +// +// becomes +// +// function gen() { +// let %gen = %makeGenerator(() => { +// %generatorYield(%gen, 1); +// %generatorYield(%gen, 2); +// %generatorYield(%gen, 3); +// }); +// return %gen; +// } +// +// the body closure runs on its own stack (runtime ucontext switch); the +// wrapper's catch converts the runtime's .return() sentinel into a +// normal return (see _ejs_Generator_prototype_return). + +import { TransformPass, VisitResult } from "../node-visitor"; +import * as b from "../ast-builder"; +import { intrinsic, startGenerator } from "../echo-util"; +import { + makeGenerator_id, + generatorYield_id, + generatorIsReturnSentinel_id, + generatorReturnValue_id, +} from "../common-ids"; +import type * as e from "../estree"; + +export class DesugarGeneratorFunctions extends TransformPass { + // innermost generator's %gen identifier first; functions nest + private mapping: e.Identifier[] = []; + private genGen = startGenerator(); + + override visitFunction(n: e.Function): VisitResult { + if (n.generator) this.mapping.unshift(b.identifier(`%_gen_${this.genGen()}`)); + super.visitFunction(n); + if (n.generator) { + const gen_id = this.mapping[0]!; + // the body wraps in a catch that converts the runtime's + // .return() sentinel into a normal return: gen.return(v) + // resumes the suspended yield by throwing the sentinel, so + // finally blocks run, and this outermost catch completes the + // generator with v + const exc_id = b.identifier(`%_genexc_${this.genGen()}`); + const old_body = b.blockStatement([ + b.tryStatement( + n.body as e.BlockStatement, + [ + b.catchClause( + exc_id, + b.blockStatement([ + b.ifStatement( + intrinsic(generatorIsReturnSentinel_id, [ + b.identifier(exc_id.name), + ]), + b.returnStatement( + intrinsic(generatorReturnValue_id, [ + b.identifier(gen_id.name), + ]) + ), + b.throwStatement(b.identifier(exc_id.name)) + ), + ]) + ), + ], + null + ), + ]); + n.body = b.blockStatement([ + b.letDeclaration( + gen_id, + intrinsic(makeGenerator_id, [b.arrowFunctionExpression([], old_body)]) + ), + b.returnStatement(b.identifier(gen_id.name)), + ]); + n.generator = false; + } + this.mapping.shift(); + return n; + } + + // yield* x → for (let %_yield of x) %generatorYield(%gen, %_yield); + // (n.argument must already be visited) + private delegateLoop(n: e.YieldExpression): e.ForOfStatement { + const yield_id = b.identifier(`%_yield_${this.genGen()}`); + return b.forOfStatement( + b.letDeclaration(yield_id, null), + n.argument!, + b.blockStatement([ + b.expressionStatement( + intrinsic(generatorYield_id, [this.mapping[0]!, yield_id]) + ), + ]) + ); + } + + // statement-position yield* replaces the whole ExpressionStatement + // with the for-of loop, keeping the AST well-formed + override visitExpressionStatement(n: e.ExpressionStatement): VisitResult { + if (n.expression.type === "YieldExpression" && n.expression.delegate) { + n.expression.argument = this.visitNullable(n.expression.argument); + return this.delegateLoop(n.expression); + } + return super.visitExpressionStatement(n); + } + + override visitYield(n: e.YieldExpression): VisitResult { + n.argument = this.visitNullable(n.argument); + if (n.delegate) { + return this.delegateLoop(n); + } + return intrinsic(generatorYield_id, [this.mapping[0]!, n.argument ?? b.undefinedLit()]); + } +} diff --git a/lib/passes/desugar-metaproperties.js b/lib/passes/desugar-metaproperties.ts similarity index 60% rename from lib/passes/desugar-metaproperties.js rename to lib/passes/desugar-metaproperties.ts index e7e54bd8..11cfb83e 100644 --- a/lib/passes/desugar-metaproperties.js +++ b/lib/passes/desugar-metaproperties.ts @@ -1,32 +1,32 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ import { reportError } from "../errors"; -import { TransformPass } from "../node-visitor"; +import { TransformPass, VisitResult } from "../node-visitor"; import { getNewTarget_id } from "../common-ids"; import { intrinsic } from "../echo-util"; -import * as b from "../ast-builder"; +import type * as e from "../estree"; export class DesugarMetaProperties extends TransformPass { - visitAssignmentExpression(n) { - if (n.left.type === b.MetaProperty) + override visitAssignmentExpression(n: e.AssignmentExpression): VisitResult { + if (n.left.type === "MetaProperty") reportError( SyntaxError, `'${n.left.meta}.${n.left.property}' not permitted on left hand side of assignment`, this.filename, - n.left.loc + n.left.loc ?? undefined ); return super.visitAssignmentExpression(n); } - visitMetaProperty(n) { + override visitMetaProperty(n: e.MetaProperty): VisitResult { if (n.meta === "new" && n.property === "target") return intrinsic(getNewTarget_id, []); reportError( SyntaxError, `unknown meta property '${n.meta}.${n.property}'`, this.filename, - n.loc + n.loc ?? undefined ); } } diff --git a/lib/passes/desugar-spread.js b/lib/passes/desugar-spread.js deleted file mode 100644 index 4ccdc0ea..00000000 --- a/lib/passes/desugar-spread.js +++ /dev/null @@ -1,203 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// -// desugars -// -// [1, 2, ...foo, 3, 4] -// -// o.foo(1, 2, ...foo, 3, 4) -// -// to: -// -// %arrayFromSpread([1, 2], foo, [3, 4]) -// -// o.foo.apply(o, %arrayFromSpread([1, 2], foo, [3, 4]) -// - -import { TransformPass } from "../node-visitor"; -import * as b from "../ast-builder"; -import { intrinsic, is_intrinsic } from "../echo-util"; -import { arrayFromSpread_id, apply_id, constructSuperApply_id, constructApply_id } from "../common-ids"; - -// split `args` into %arrayFromSpread operands: runs of plain arguments -// become array literals, spread arguments pass through as iterables -function spreadChunks(args) { - let chunks = []; - let current = []; - for (let el of args) { - if (el.type === b.SpreadElement) { - if (current.length > 0) { - chunks.push(b.arrayExpression(current)); - current = []; - } - chunks.push(el.argument); - } else { - current.push(el); - } - } - if (current.length > 0) chunks.push(b.arrayExpression(current)); - return chunks; -} - -export class DesugarSpread extends TransformPass { - visitArrayExpression(n) { - n = super.visitArrayExpression(n); - let needs_desugaring = false; - for (let el of n.elements) { - if (el && el.type === b.SpreadElement) { - needs_desugaring = true; - break; - } - } - - if (!needs_desugaring) return n; - - let new_args = []; - let current_elements = []; - for (let el of n.elements) { - if (el && el.type === b.SpreadElement) { - if (current_elements.length === 0) { - // just push the spread argument into the new args - new_args.push(el.argument); - } else { - // push the current_elements as an array literal, then the spread. - // also reset current_elements to [] - new_args.push(b.arrayExpression(current_elements)); - new_args.push(el.argument); - current_elements = []; - } - } else { - current_elements.push(el); - } - } - if (current_elements.length > 0) new_args.push(b.arrayExpression(current_elements)); - - // check to see if we've just created an array of nothing but array literals, and flatten them all - // into one and get rid of the spread altogether - let all_arrays = true; - for (let a of new_args) { - if (a.type !== b.ArrayExpression) all_arrays = false; - } - - if (all_arrays) { - let na = []; - for (let a of new_args) na = na.concat(a.elements); - n.elements = na; - return n; - } else { - return intrinsic(arrayFromSpread_id, new_args); - } - } - - // new Foo(...args) -> %constructApply(Foo, %arrayFromSpread(...)); - // both pipelines construct through the runtime's dense-array apply - // (spread-new never compiled before) - visitNewExpression(n) { - n = super.visitNewExpression(n); - if (!n.arguments.some((el) => el.type === b.SpreadElement)) return n; - let chunks = spreadChunks(n.arguments); - if (chunks.every((a) => a.type === b.ArrayExpression)) { - let flat = []; - for (let a of chunks) - flat = flat.concat(a.elements.map((el) => (el === null ? b.undefinedLit() : el))); - n.arguments = flat; - return n; - } - return intrinsic(constructApply_id, [n.callee, intrinsic(arrayFromSpread_id, chunks)]); - } - - visitCallExpression(n) { - n = super.visitCallExpression(n); - - // super(...args) / super.foo(...args) can't be rewritten to an - // .apply call. this pass now runs before DesugarClasses (pre-EIR); - // leave super calls alone — DesugarClasses rewrites them into - // ordinary calls, and the post-classes run of this pass desugars - // whatever spreads remain. - if (n.callee.type === b.Super) return n; - if (n.callee.type === b.MemberExpression && n.callee.object.type === b.Super) return n; - - let needs_desugaring = false; - for (let el of n.arguments) { - if (el.type === b.SpreadElement) { - needs_desugaring = true; - break; - } - } - - if (!needs_desugaring) return n; - - // super(...args), already desugared by DesugarClasses (which runs - // first) into %constructSuper(ref, ...args): the intrinsic isn't a - // value and can't be .apply'd — use the runtime's apply form. - // (spread super calls didn't compile at all before this.) - if (is_intrinsic(n, "%constructSuper")) { - let super_ref = n.arguments[0]; - let chunks = spreadChunks(n.arguments.slice(1)); - if (chunks.every((a) => a.type === b.ArrayExpression)) { - // spreads of array literals only: flatten back to a plain - // %constructSuper (holes become undefined, as below) - let flat = []; - for (let a of chunks) - flat = flat.concat(a.elements.map((el) => (el === null ? b.undefinedLit() : el))); - n.arguments = [super_ref].concat(flat); - } else { - n.callee = constructSuperApply_id; - n.arguments = [super_ref, intrinsic(arrayFromSpread_id, chunks)]; - } - return n; - } - - let new_args = []; - let current_elements = []; - for (let el of n.arguments) { - if (el.type === b.SpreadElement) { - if (current_elements.length === 0) { - // just push the spread argument into the new args - new_args.push(el.argument); - } else { - // push the current_elements as an array literal, then the spread. - // also reset current_elements to [] - new_args.push(b.arrayExpression(current_elements)); - new_args.push(el.argument); - current_elements = []; - } - } else { - current_elements.push(el); - } - } - - if (current_elements.length > 0) new_args.push(b.arrayExpression(current_elements)); - - // check to see if we've just created an array of nothing but array literals, and flatten them all - // into one and get rid of the spread altogether - let all_arrays = true; - for (let a of new_args) { - if (a.type !== b.ArrayExpression) { - all_arrays = false; - break; - } - } - if (all_arrays) { - let na = []; - for (let a of new_args) na = na.concat(a.elements); - - // if we're converting an array with holes into arguments for a function, hole => undefined - na = na.map((el) => (el === null ? b.undefinedLit() : el)); - - n.arguments = na; - } else { - let receiver; - - if (n.callee.type === b.MemberExpression) receiver = n.callee.object; - else receiver = b.nullLit(); - - n.callee = b.memberExpression(n.callee, apply_id); - n.arguments = [receiver, intrinsic(arrayFromSpread_id, new_args)]; - } - - return n; - } -} diff --git a/lib/passes/desugar-spread.ts b/lib/passes/desugar-spread.ts new file mode 100644 index 00000000..2210f75f --- /dev/null +++ b/lib/passes/desugar-spread.ts @@ -0,0 +1,139 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// +// desugars +// +// [1, 2, ...foo, 3, 4] +// +// o.foo(1, 2, ...foo, 3, 4) +// +// to: +// +// %arrayFromSpread([1, 2], foo, [3, 4]) +// +// o.foo.apply(o, %arrayFromSpread([1, 2], foo, [3, 4]) +// + +import { TransformPass, VisitResult } from "../node-visitor"; +import * as b from "../ast-builder"; +import { intrinsic, is_intrinsic } from "../echo-util"; +import { + arrayFromSpread_id, + apply_id, + constructSuperApply_id, + constructApply_id, +} from "../common-ids"; +import type * as e from "../estree"; + +// split `args` into %arrayFromSpread operands: runs of plain arguments +// become array literals, spread arguments pass through as iterables +function spreadChunks(args: (e.Expression | e.SpreadElement | null)[]): e.Expression[] { + const chunks: e.Expression[] = []; + let current: (e.Expression | e.SpreadElement | null)[] = []; + for (const el of args) { + if (el && el.type === "SpreadElement") { + if (current.length > 0) { + chunks.push(b.arrayExpression(current)); + current = []; + } + chunks.push(el.argument); + } else { + current.push(el); + } + } + if (current.length > 0) chunks.push(b.arrayExpression(current)); + return chunks; +} + +// holes become undefined when array elements turn into call arguments +function holeToUndefined(el: e.Expression | e.SpreadElement | null): e.Expression | e.SpreadElement { + return el === null ? b.undefinedLit() : el; +} + +export class DesugarSpread extends TransformPass { + override visitArrayExpression(n: e.ArrayExpression): VisitResult { + super.visitArrayExpression(n); + const needs_desugaring = n.elements.some((el) => el && el.type === "SpreadElement"); + if (!needs_desugaring) return n; + + const chunks = spreadChunks(n.elements); + if (chunks.every((a) => a.type === "ArrayExpression")) { + // spreads of array literals only: flatten back into one literal + let flat: (e.Expression | e.SpreadElement | null)[] = []; + for (const a of chunks) flat = flat.concat((a as e.ArrayExpression).elements); + n.elements = flat; + return n; + } + return intrinsic(arrayFromSpread_id, chunks); + } + + // new Foo(...args) -> %constructApply(Foo, %arrayFromSpread(...)); + // constructs through the runtime's dense-array apply + override visitNewExpression(n: e.NewExpression): VisitResult { + super.visitNewExpression(n); + if (!n.arguments.some((el) => el.type === "SpreadElement")) return n; + const chunks = spreadChunks(n.arguments); + if (chunks.every((a) => a.type === "ArrayExpression")) { + let flat: (e.Expression | e.SpreadElement)[] = []; + for (const a of chunks) + flat = flat.concat((a as e.ArrayExpression).elements.map(holeToUndefined)); + n.arguments = flat; + return n; + } + return intrinsic(constructApply_id, [n.callee, intrinsic(arrayFromSpread_id, chunks)]); + } + + override visitCallExpression(n: e.CallExpression): VisitResult { + super.visitCallExpression(n); + + // super(...args) / super.foo(...args) can't be rewritten to an + // .apply call. this pass runs before DesugarClasses; leave super + // calls alone — DesugarClasses rewrites them into ordinary calls, + // and the post-classes run of this pass desugars what remains. + if (n.callee.type === "Super") return n; + if (n.callee.type === "MemberExpression" && n.callee.object.type === "Super") return n; + + const needs_desugaring = n.arguments.some((el) => el.type === "SpreadElement"); + if (!needs_desugaring) return n; + + // super(...args), already desugared by DesugarClasses (which runs + // first) into %constructSuper(ref, ...args): the intrinsic isn't a + // value and can't be .apply'd — use the runtime's apply form. + if (is_intrinsic(n, "%constructSuper")) { + const super_ref = n.arguments[0] as e.Expression; + const chunks = spreadChunks(n.arguments.slice(1)); + if (chunks.every((a) => a.type === "ArrayExpression")) { + // spreads of array literals only: flatten back to a plain + // %constructSuper (holes become undefined, as below) + let flat: (e.Expression | e.SpreadElement)[] = []; + for (const a of chunks) + flat = flat.concat((a as e.ArrayExpression).elements.map(holeToUndefined)); + n.arguments = [super_ref, ...flat]; + } else { + n.callee = constructSuperApply_id; + n.arguments = [super_ref, intrinsic(arrayFromSpread_id, chunks)]; + } + return n; + } + + const chunks = spreadChunks(n.arguments); + if (chunks.every((a) => a.type === "ArrayExpression")) { + // if we're converting an array with holes into arguments for a + // function, hole => undefined + let flat: (e.Expression | e.SpreadElement)[] = []; + for (const a of chunks) + flat = flat.concat((a as e.ArrayExpression).elements.map(holeToUndefined)); + n.arguments = flat; + return n; + } + + const receiver: e.Expression = + n.callee.type === "MemberExpression" ? (n.callee.object as e.Expression) : b.nullLit(); + + n.callee = b.memberExpression(n.callee, apply_id); + n.arguments = [receiver, intrinsic(arrayFromSpread_id, chunks)]; + return n; + } +} From d6790bf1359badd64fc854bc94fc5d5a241529fc Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 17:21:59 -0700 Subject: [PATCH 058/146] ts: desugar-destructuring MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Binding record (key/value/need_decl) is a real interface now, and the dialect fact that declaration-position array rests parse as SpreadElement while assignment-position ones are RestElement lives in estree.ts (ArrayPattern.elements admits both). Where the old code reused one identifier node across declaration and value positions, the port mints fresh nodes per use — the rule the node-keyed refs machinery documents. The misplaced-argument reportError in the elements-after-spread path (loc passed as filename) is fixed. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/estree.ts | 4 +- ...tructuring.js => desugar-destructuring.ts} | 256 ++++++++++-------- 2 files changed, 140 insertions(+), 120 deletions(-) rename lib/passes/{desugar-destructuring.js => desugar-destructuring.ts} (51%) diff --git a/lib/estree.ts b/lib/estree.ts index d6708c64..917e59f9 100644 --- a/lib/estree.ts +++ b/lib/estree.ts @@ -230,7 +230,9 @@ export interface ObjectPattern extends BaseNode { export interface ArrayPattern extends BaseNode { type: "ArrayPattern"; - elements: (Pattern | null)[]; + // dialect: declaration-position rests parse as SpreadElement, + // assignment-position ones as RestElement + elements: (Pattern | SpreadElement | null)[]; } export interface RestElement extends BaseNode { diff --git a/lib/passes/desugar-destructuring.js b/lib/passes/desugar-destructuring.ts similarity index 51% rename from lib/passes/desugar-destructuring.js rename to lib/passes/desugar-destructuring.ts index 6ad0a894..772a6b53 100644 --- a/lib/passes/desugar-destructuring.js +++ b/lib/passes/desugar-destructuring.ts @@ -1,9 +1,9 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ import { startGenerator, intrinsic } from "../echo-util"; -import { TransformPass } from "../node-visitor"; +import { TransformPass, VisitResult } from "../node-visitor"; import * as b from "../ast-builder"; import { reportError } from "../errors"; import { @@ -13,23 +13,38 @@ import { getNextValue_id, getRest_id, } from "../common-ids"; +import type * as e from "../estree"; -let gen = startGenerator(); -let fresh = () => b.identifier(`%destruct_tmp${gen()}`); +const gen = startGenerator(); +const fresh = () => b.identifier(`%destruct_tmp${gen()}`); // note: value-position identifiers must be fresh AST nodes per use (the // EIR scope analysis resolves references in a node-keyed map), so the // Symbol.iterator member expression is minted per call site -function symbolIterator() { +function symbolIterator(): e.MemberExpression { return b.memberExpression(b.identifier(Symbol_id.name), iterator_id); } +// one desugared binding: `key` receives `value`. need_decl bindings are +// synthesized temps; the rest are the pattern's own targets (declared in +// declaration position, assigned in assignment position). +interface Binding { + key: e.Identifier | e.Pattern; + value: e.Expression; + need_decl?: boolean; +} + // bind `target` (an Identifier or a nested pattern) to `value`, applying // the AssignmentPattern default `dflt` if present: // let %dt = value, target = %dt === undefined ? dflt : %dt; -function bindTarget(target, value, dflt, bindings) { +function bindTarget( + target: e.Pattern, + value: e.Expression, + dflt: e.Expression | null, + bindings: Binding[] +): void { if (dflt) { - let dt = fresh(); + const dt = fresh(); bindings.push({ key: dt, value: value, need_decl: true }); value = b.conditionalExpression( b.binaryExpression(b.identifier(dt.name), "===", b.undefinedLit()), @@ -38,32 +53,36 @@ function bindTarget(target, value, dflt, bindings) { ); } - if (target.type === b.Identifier) { + if (target.type === "Identifier") { bindings.push({ key: target, value: value }); return; } // a nested pattern: land the (possibly defaulted) value in a temp and // recurse - let pt = fresh(); + const pt = fresh(); bindings.push({ key: pt, value: value, need_decl: true }); - if (target.type === b.ObjectPattern) + if (target.type === "ObjectPattern") createObjectPatternBindings(b.identifier(pt.name), target, bindings); - else if (target.type === b.ArrayPattern) + else if (target.type === "ArrayPattern") createArrayPatternBindingsUsingIterator(b.identifier(pt.name), target, bindings); else throw new Error(`bindTarget: target.type = ${target.type}`); } // given an assignment { pattern } = id // -function createObjectPatternBindings(id, pattern, bindings) { - for (let prop of pattern.properties) { - let memberexp = b.memberExpression(id, prop.key); +function createObjectPatternBindings( + id: e.Identifier, + pattern: e.ObjectPattern, + bindings: Binding[] +): void { + for (const prop of pattern.properties) { + const memberexp = b.memberExpression(id, prop.key); if (prop.computed) memberexp.computed = true; - let target = prop.value; - let dflt = null; - if (target.type === b.AssignmentPattern) { + let target = prop.value as e.Pattern; + let dflt: e.Expression | null = null; + if (target.type === "AssignmentPattern") { dflt = target.right; target = target.left; } @@ -72,12 +91,16 @@ function createObjectPatternBindings(id, pattern, bindings) { } } -function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { +function createArrayPatternBindingsUsingIterator( + id: e.Identifier, + pattern: e.ArrayPattern, + bindings: Binding[] +): void { let seen_spread = false; // first off we create an iterator and wrapper for the rhs - let iter_id = fresh(); - let wrapper_id = fresh(); + const iter_id = fresh(); + const wrapper_id = fresh(); bindings.push({ key: iter_id, value: b.callExpression(b.memberExpression(id, symbolIterator(), true), []), @@ -89,20 +112,25 @@ function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { need_decl: true, }); - let nextValue = () => + const nextValue = () => b.callExpression(b.memberExpression(b.identifier(wrapper_id.name), getNextValue_id), []); - for (let el of pattern.elements) { + for (const el of pattern.elements) { if (seen_spread) - reportError(SyntaxError, "elements after spread element in array pattern", el.loc); + reportError( + SyntaxError, + "elements after spread element in array pattern", + "", + el && el.loc ? el.loc : undefined + ); if (el == null) { bindings.push({ key: fresh() /*unused*/, value: nextValue() }); - } else if (el.type === b.SpreadElement || el.type === b.RestElement) { + } else if (el.type === "SpreadElement" || el.type === "RestElement") { // declaration-position rests parse as SpreadElement, // assignment-position ones as RestElement bindings.push({ - key: el.argument, + key: el.argument as e.Pattern, value: b.callExpression( b.memberExpression(b.identifier(wrapper_id.name), getRest_id), [] @@ -110,9 +138,9 @@ function createArrayPatternBindingsUsingIterator(id, pattern, bindings) { }); seen_spread = true; } else { - let target = el; - let dflt = null; - if (target.type === b.AssignmentPattern) { + let target: e.Pattern = el; + let dflt: e.Expression | null = null; + if (target.type === "AssignmentPattern") { dflt = target.right; target = target.left; } @@ -131,99 +159,93 @@ export class DesugarDestructuring extends TransformPass { // the inner statement then desugars through the ordinary // declaration/assignment paths. body-scoped `let`s are fresh per // iteration, preserving per-iteration capture semantics. - desugarForHead(n) { - let head = n.left; - let bindStmt = null; - if (head.type === b.VariableDeclaration) { - let d = head.declarations[0]; - if (head.declarations.length === 1 && d.id.type !== b.Identifier) { - let tmp = fresh(); - let inner = b.variableDeclaration(head.kind, d.id, tmp); + private desugarForHead(n: e.ForOfStatement | e.ForInStatement): VisitResult { + const head = n.left; + let bindStmt: VisitResult = null; + if (head.type === "VariableDeclaration") { + const d = head.declarations[0]!; + if (head.declarations.length === 1 && d.id.type !== "Identifier") { + const tmp = fresh(); + const inner = b.variableDeclaration(head.kind, d.id, b.identifier(tmp.name)); bindStmt = this.visit(inner); - n.left = b.letDeclaration(tmp, null); + const newHead = b.letDeclaration(tmp, null); // strip the placeholder init: a for-of/for-in head // declaration has no initializer - n.left.declarations[0].init = null; + newHead.declarations[0]!.init = null; + n.left = newHead; } - } else if (head.type !== b.Identifier) { + } else if (head.type !== "Identifier") { // ObjectPattern/ArrayPattern assignment form, or a member // expression target - let tmp = fresh(); - let assign = b.expressionStatement(b.assignmentExpression(head, "=", tmp)); + const tmp = fresh(); + const assign = b.expressionStatement( + b.assignmentExpression(head, "=", b.identifier(tmp.name)) + ); bindStmt = this.visit(assign); - n.left = b.letDeclaration(tmp, null); - n.left.declarations[0].init = null; + const newHead = b.letDeclaration(tmp, null); + newHead.declarations[0]!.init = null; + n.left = newHead; } - n.right = this.visit(n.right); - n.body = this.visit(n.body); + n.right = this.visitAs(n.right); + n.body = this.visitAs(n.body); if (bindStmt) { - let stmts = Array.isArray(bindStmt) ? bindStmt : [bindStmt]; + const stmts = (Array.isArray(bindStmt) ? bindStmt : [bindStmt]) as e.Statement[]; n.body = b.blockStatement(stmts.concat([n.body])); } return n; } - visitForOf(n) { + override visitForOf(n: e.ForOfStatement): VisitResult { return this.desugarForHead(n); } - visitForIn(n) { + override visitForIn(n: e.ForInStatement): VisitResult { return this.desugarForHead(n); } // catch ({ message }) { ... } => catch (%t) { let { message } = %t; ... } - visitCatchClause(n) { - if (n.param && n.param.type !== b.Identifier) { - let tmp = fresh(); - let bindDecl = this.visit(b.letDeclaration(n.param, tmp)); + override visitCatchClause(n: e.CatchClause): VisitResult { + if (n.param && n.param.type !== "Identifier") { + const tmp = fresh(); + const bindDecl = this.visitAs( + b.letDeclaration(n.param, b.identifier(tmp.name)) + ); n.param = tmp; - n.body = this.visit(n.body); + n.body = this.visitAs(n.body); n.body.body.unshift(bindDecl); return n; } return super.visitCatchClause(n); } - visitFunction(n) { + override visitFunction(n: e.Function): VisitResult { // we visit the formal parameters directly, rewriting // them as tmp arg names and adding 'let' decls for the // pattern identifiers at the top of the function's // body. - let new_params = []; - let new_decls = []; - for (let p of n.params) { - let ptype = p.type; - if (ptype === b.ObjectPattern) { - let p_id = fresh(); - new_params.push(p_id); - let new_decl = b.letDeclaration(); - let bindings = []; - createObjectPatternBindings(p_id, p, bindings); - for (let binding of bindings) { - new_decl.declarations.push(b.variableDeclarator(binding.key, binding.value)); - } - new_decls.push(new_decl); - } else if (ptype === b.ArrayPattern) { - let p_id = fresh(); + const new_params: e.Pattern[] = []; + const new_decls: e.VariableDeclaration[] = []; + for (const p of n.params) { + if (p.type === "ObjectPattern" || p.type === "ArrayPattern") { + const p_id = fresh(); new_params.push(p_id); - let new_decl = b.letDeclaration(); - let bindings = []; - createArrayPatternBindingsUsingIterator(p_id, p, bindings); - for (let binding of bindings) { - new_decl.declarations.push(b.variableDeclarator(binding.key, binding.value)); - } + const bindings: Binding[] = []; + if (p.type === "ObjectPattern") createObjectPatternBindings(p_id, p, bindings); + else createArrayPatternBindingsUsingIterator(p_id, p, bindings); + const new_decl = b.variableDeclaration( + "let", + bindings.map((binding) => b.variableDeclarator(binding.key, binding.value)) + ); new_decls.push(new_decl); - } else if (ptype === b.Identifier) { + } else if (p.type === "Identifier") { // we just pass this along new_params.push(p); - } else if (ptype === b.RestElement && p.argument.type === b.Identifier) { - // this pass runs pre-EIR now, BEFORE DesugarRestParameters: - // a trailing ...rest stays in place (EIR handles it - // natively; the legacy rest pass strips it later) + } else if (p.type === "RestElement" && p.argument.type === "Identifier") { + // a trailing ...rest stays in place (EIR handles it natively) new_params.push(p); } else { throw new Error( - `unhandled type of formal parameter in DesugarDestructuring ${ptype}` + `unhandled type of formal parameter in DesugarDestructuring ${p.type}` ); } } @@ -232,47 +254,42 @@ export class DesugarDestructuring extends TransformPass { // n.body.body here used to clobber the body of `() => () => ...` // (the inner arrow's body field) with [undefined]. wrap in a // block only when there are decls to prepend. - if (n.body.type === b.BlockStatement) { - n.body.body = new_decls.concat(n.body.body); + if (n.body.type === "BlockStatement") { + n.body.body = (new_decls as e.Statement[]).concat(n.body.body); } else if (new_decls.length > 0) { - n.body = b.blockStatement(new_decls.concat([b.returnStatement(n.body)])); + n.body = b.blockStatement( + (new_decls as e.Statement[]).concat([b.returnStatement(n.body)]) + ); n.expression = false; } n.params = new_params; - n.body = this.visit(n.body); + n.body = this.visitAs(n.body); return n; } - visitVariableDeclaration(n) { - let decls = []; + override visitVariableDeclaration(n: e.VariableDeclaration): VisitResult { + const decls: e.VariableDeclarator[] = []; - for (let decl of n.declarations) { - if (decl.id.type === b.ObjectPattern) { - let obj_tmp_id = fresh(); - let bindings = []; - decls.push(b.variableDeclarator(obj_tmp_id, this.visit(decl.init))); - createObjectPatternBindings(obj_tmp_id, decl.id, bindings); - for (let binding of bindings) { + for (const decl of n.declarations) { + if (decl.id.type === "ObjectPattern" || decl.id.type === "ArrayPattern") { + const tmp_id = fresh(); + const bindings: Binding[] = []; + decls.push(b.variableDeclarator(tmp_id, this.visitNullable(decl.init ?? null))); + if (decl.id.type === "ObjectPattern") + createObjectPatternBindings(tmp_id, decl.id, bindings); + else createArrayPatternBindingsUsingIterator(tmp_id, decl.id, bindings); + for (const binding of bindings) { decls.push(b.variableDeclarator(binding.key, binding.value)); } - } else if (decl.id.type === b.ArrayPattern) { - // create a fresh tmp and declare it - let array_tmp_id = fresh(); - let bindings = []; - decls.push(b.variableDeclarator(array_tmp_id, this.visit(decl.init))); - createArrayPatternBindingsUsingIterator(array_tmp_id, decl.id, bindings); - for (let binding of bindings) { - decls.push(b.variableDeclarator(binding.key, binding.value)); - } - } else if (decl.id.type === b.Identifier) { - decl.init = this.visit(decl.init); + } else if (decl.id.type === "Identifier") { + decl.init = this.visitNullable(decl.init ?? null); decls.push(decl); } else { reportError( Error, `unhandled type of variable declaration in DesugarDestructuring ${decl.id.type}`, this.filename, - n.loc + n.loc ?? undefined ); } } @@ -280,26 +297,26 @@ export class DesugarDestructuring extends TransformPass { return n; } - visitAssignmentExpression(n) { - if (n.left.type === b.ObjectPattern || n.left.type === b.ArrayPattern) { + override visitAssignmentExpression(n: e.AssignmentExpression): VisitResult { + if (n.left.type === "ObjectPattern" || n.left.type === "ArrayPattern") { if (n.operator !== "=") reportError( Error, "cannot use destructuring with assignment operators other than =", this.filename, - n.loc + n.loc ?? undefined ); - let obj_tmp_id = fresh(); - let tmp_decl = b.letDeclaration(obj_tmp_id, this.visit(n.right)); + const obj_tmp_id = fresh(); + const tmp_decl = b.letDeclaration(obj_tmp_id, this.visitAs(n.right)); - let assignments = []; - let bindings = []; - if (n.left.type === b.ObjectPattern) + const assignments: e.Statement[] = []; + const bindings: Binding[] = []; + if (n.left.type === "ObjectPattern") createObjectPatternBindings(obj_tmp_id, n.left, bindings); else createArrayPatternBindingsUsingIterator(obj_tmp_id, n.left, bindings); - for (let binding of bindings) { + for (const binding of bindings) { if (binding.need_decl) { assignments.push(b.letDeclaration(binding.key, binding.value)); } else { @@ -311,12 +328,13 @@ export class DesugarDestructuring extends TransformPass { } } - assignments.push(b.returnStatement(obj_tmp_id)); + assignments.push(b.returnStatement(b.identifier(obj_tmp_id.name))); return b.callExpression( b.functionExpression(null, [], b.blockStatement([tmp_decl, ...assignments])), [] ); - } else return super.visitAssignmentExpression(n); + } + return super.visitAssignmentExpression(n); } } From 6ac30277503c72cc3a82b55cdb43b8cb6518d64d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 18:20:47 -0700 Subject: [PATCH 059/146] ts: desugar-classes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The property-accessor bookkeeping becomes a real AccessorEntry interface (get/set/computed) instead of a Map with a "computed" string key mixed among the accessor kinds; classes with a filled-in id get a NamedClass type so the IIFE machinery states its one real precondition. The escodegen dependency drops — its only use was pretty-printing a key in an error message that nameOfKey serves fine. The unused class_stack is gone, as are the phantom 5th/6th arguments several call sites passed to b.functionExpression (the builder always ignored them). Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- ...{desugar-classes.js => desugar-classes.ts} | 330 +++++++++--------- 1 file changed, 169 insertions(+), 161 deletions(-) rename lib/passes/{desugar-classes.js => desugar-classes.ts} (52%) diff --git a/lib/passes/desugar-classes.js b/lib/passes/desugar-classes.ts similarity index 52% rename from lib/passes/desugar-classes.js rename to lib/passes/desugar-classes.ts index eda76cb1..0ad8a1d7 100644 --- a/lib/passes/desugar-classes.js +++ b/lib/passes/desugar-classes.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ // // converts: @@ -41,10 +41,9 @@ import { } from "../common-ids"; import { Stack } from "../stack-es6"; import { reportError } from "../errors"; -import { TransformPass } from "../node-visitor"; +import { TransformPass, VisitResult } from "../node-visitor"; import { intrinsic, startGenerator } from "../echo-util"; - -import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; +import type * as e from "../estree"; // identifiers that appear in VALUE position must be fresh AST nodes per // use: the EIR scope analysis resolves references in a map keyed by node, @@ -52,127 +51,127 @@ import * as escodegen from "../../external-deps/escodegen/escodegen-es6"; // class iifes would resolve every occurrence to the LAST iife's binding. // property-position identifiers (`.prototype`, object keys) are never // resolved and may stay shared. -function freshSuper() { +function freshSuper(): e.Identifier { return b.identifier(superid.name); } -function freshProto() { +function freshProto(): e.Identifier { return b.identifier(proto_id.name); } -function createSuperReference(is_static, id) { - if (id && id.name === "constructor") return freshSuper(); +function createSuperReference(is_static: boolean, id?: e.Expression): e.Expression { + if (id && id.type === "Identifier" && id.name === "constructor") return freshSuper(); - let obj = is_static ? freshSuper() : b.memberExpression(freshSuper(), prototype_id); + const obj = is_static ? freshSuper() : b.memberExpression(freshSuper(), prototype_id); if (!id) return obj; return b.memberExpression(obj, id); } -let classgen = startGenerator(); -function freshClassId() { +// a class node whose (possibly synthesized) id is known present +type NamedClass = e.ClassBase & { id: e.Identifier }; + +const classgen = startGenerator(); +function freshClassId(): e.Identifier { return b.identifier(`%anonClass_${classgen()}`); } +// one prototype/static property's accessors (a get/set pair for the same +// non-computed name shares an entry — keying by the key AST node lost the +// getter, latent bug #14/#26) +interface AccessorEntry { + get?: e.MethodDefinition; + set?: e.MethodDefinition; + computed: boolean; +} + export class DesugarClasses extends TransformPass { - constructor(options) { - super(options); - this.class_stack = new Stack(); - this.method_stack = new Stack(); - } + private method_stack = new Stack(); - visitCallExpression(n) { - if (n.callee.type === b.Super) { - if (this.method_stack.top.key.name !== "constructor") { + override visitCallExpression(n: e.CallExpression): VisitResult { + if (n.callee.type === "Super") { + const method = this.method_stack.top; + if (this.nameOfKey(method.key) !== "constructor") { reportError( SyntaxError, "calls to super() are only allowable in constructors.", this.filename, - n.callee.loc + n.callee.loc ?? undefined ); } - let super_ref = createSuperReference( - this.method_stack.top.static, - this.method_stack.top.key - ); + const super_ref = createSuperReference(method.static === true, method.key); n.callee = constructSuper_id; n.arguments.unshift(super_ref); - } else if (n.callee.type === b.MemberExpression && n.callee.object.type === b.Super) { - let super_ref = createSuperReference( - this.method_stack.top.static, - this.method_stack.top.key - ); + } else if (n.callee.type === "MemberExpression" && n.callee.object.type === "Super") { + const method = this.method_stack.top; + const super_ref = createSuperReference(method.static === true, method.key); n.callee = b.memberExpression(super_ref, call_id); n.arguments.unshift(b.thisExpression()); } else { - n.callee = this.visit(n.callee); + n.callee = this.visitAs(n.callee); } n.arguments = this.visitArray(n.arguments); return n; } - visitNewExpression(n) { - n.callee = this.visit(n.callee); + override visitNewExpression(n: e.NewExpression): VisitResult { + n.callee = this.visitAs(n.callee); n.arguments = this.visitArray(n.arguments); return n; } - visitObjectExpression(n) { - for (let property of n.properties) { - if (property.computed) property.key = this.visit(property.key); - property.value = this.visit(property.value); + override visitObjectExpression(n: e.ObjectExpression): VisitResult { + for (const property of n.properties) { + if (property.computed) property.key = this.visitAs(property.key); + property.value = this.visitAs(property.value); } return n; } - visitSuper() { - return createSuperReference(this.method_stack.top.static); + override visitSuper(): VisitResult { + return createSuperReference(this.method_stack.top.static === true); } - visitClassDeclaration(n) { + override visitClassDeclaration(n: e.ClassDeclaration): VisitResult { if (!n.id) n.id = freshClassId(); - n.superClass = this.visit(n.superClass); - let iife = this.generateClassIIFE(n); + n.superClass = this.visitNullable(n.superClass); + const iife = this.generateClassIIFE(n); return b.letDeclaration(n.id, b.callExpression(iife, n.superClass ? [n.superClass] : [])); } - visitClassExpression(n) { + override visitClassExpression(n: e.ClassExpression): VisitResult { if (!n.id) n.id = freshClassId(); - n.superClass = this.visit(n.superClass); - let iife = this.generateClassIIFE(n); + n.superClass = this.visitNullable(n.superClass); + const iife = this.generateClassIIFE(n as NamedClass); return b.callExpression(iife, n.superClass ? [n.superClass] : []); } - generateClassIIFE(n) { - // we visit all the functions defined in the class so that 'super' is replaced with '%super' - this.class_stack.push(n); - - // XXX this push/pop should really be handled in this.visitMethodDefinition - for (let class_element of n.body.body) { + private generateClassIIFE(n: NamedClass): e.FunctionExpression { + // visit all the functions defined in the class so that 'super' is + // replaced with '%super' + for (const class_element of n.body.body) { this.method_stack.push(class_element); - class_element.value = this.visit(class_element.value); + class_element.value = this.visitAs(class_element.value); this.method_stack.pop(); } - this.class_stack.pop(); - - let class_init_iife_body = []; + let class_init_iife_body: e.Statement[] = []; - let [properties, methods, sproperties, smethods] = this.gather_members(n); + const { properties, methods, sproperties, smethods } = this.gather_members(n); // a fresh node per value-position use of the class name: n.id // itself becomes the OUTER let declarator (visitClassDeclaration), // and node-keyed reference resolution must not alias the two scopes - let cname = () => b.identifier(n.id.name); + const cname = () => b.identifier(n.id.name); class_init_iife_body.push( b.letDeclaration(b.identifier("proto"), b.memberExpression(cname(), prototype_id)) ); - let ctor = null; + let ctor: e.MethodDefinition | null = null; methods.forEach((m, mkey) => { - // if it's a method with name 'constructor' output the special ctor function + // the method named 'constructor' becomes the special ctor function if (mkey === "constructor") { ctor = m; } else { @@ -181,11 +180,11 @@ export class DesugarClasses extends TransformPass { }); smethods.forEach((sm) => class_init_iife_body.push(this.create_static_method(sm, n))); - let proto_props = this.create_properties(properties, n, false); - if (proto_props) class_init_iife_body = class_init_iife_body.concat(proto_props); + const proto_props = this.create_properties(properties, n, false); + if (proto_props) class_init_iife_body.push(proto_props); - let static_props = this.create_properties(sproperties, n, true); - if (static_props) class_init_iife_body = class_init_iife_body.concat(static_props); + const static_props = this.create_properties(sproperties, n, true); + if (static_props) class_init_iife_body.push(static_props); // generate and prepend a default ctor if there isn't one declared. // It looks like this in code: @@ -195,11 +194,11 @@ export class DesugarClasses extends TransformPass { // we didn't visit it above, so do it now this.method_stack.push(ctor); - ctor.value = this.visit(ctor.value); + ctor.value = this.visitAs(ctor.value); this.method_stack.pop(); } - let ctor_func = this.create_constructor(ctor, n); + const ctor_func = this.create_constructor(ctor, n); if (n.superClass) { class_init_iife_body.unshift( b.expressionStatement( @@ -228,9 +227,7 @@ export class DesugarClasses extends TransformPass { // 14.5.17 step 9, make sure the constructor's __proto__ is set to superClass class_init_iife_body.unshift( - b.expressionStatement( - b.callExpression(setPrototypeOf_id, [cname(), freshSuper()]) - ) + b.expressionStatement(b.callExpression(setPrototypeOf_id, [cname(), freshSuper()])) ); class_init_iife_body.unshift( @@ -248,121 +245,131 @@ export class DesugarClasses extends TransformPass { class_init_iife_body.push(b.returnStatement(cname())); // (function (%super?) { ... }) - let iife_body = b.blockStatement(class_init_iife_body, n.loc); + const iife_body = b.blockStatement(class_init_iife_body, n.loc ?? null); return b.functionExpression( b.identifier(`${n.id.name || "anonclass"}_iife`), n.superClass ? [freshSuper()] : [], - iife_body, - [], - null, - n.loc + iife_body ); } - gather_members(ast_class) { - let methods = new Map(); - let smethods = new Map(); - let properties = new Map(); - let sproperties = new Map(); - - for (let class_element of ast_class.body.body) { - let class_element_name = this.nameOfKey(class_element.key); + private gather_members(ast_class: NamedClass): { + properties: Map; + methods: Map; + sproperties: Map; + smethods: Map; + } { + const methods = new Map(); + const smethods = new Map(); + const properties = new Map(); + const sproperties = new Map(); + + for (const class_element of ast_class.body.body) { + const class_element_name = this.nameOfKey(class_element.key); if (class_element.static && class_element_name === "prototype") reportError( SyntaxError, 'Illegal method name "prototype" on static class member.', this.filename, - class_element.loc + class_element.loc ?? undefined ); if (class_element.kind === "method" || class_element.kind === "constructor") { // a method - let method_map = class_element.static ? smethods : methods; + const method_map = class_element.static ? smethods : methods; if (method_map.has(class_element_name)) reportError( SyntaxError, `method '${class_element_name}' has already been defined.`, this.filename, - class_element.loc + class_element.loc ?? undefined ); method_map.set(class_element_name, class_element); - } else { - // a property - let property_map = class_element.static ? sproperties : properties; + } else if (class_element.kind === "get" || class_element.kind === "set") { + // an accessor property + const property_map = class_element.static ? sproperties : properties; // key non-computed accessors by NAME so a get/set pair for // the same property shares one entry: keying by the key // AST node put them in separate entries, and the emitted // `{ n: {get}, n: {set} }` object literal lost the getter - let prop_key = class_element.computed - ? class_element.key - : class_element_name; + const prop_key = class_element.computed ? class_element.key : class_element_name; - if (!property_map.has(prop_key)) property_map.set(prop_key, new Map()); + let entry = property_map.get(prop_key); + if (!entry) { + entry = { computed: class_element.computed === true }; + property_map.set(prop_key, entry); + } - if (property_map.get(prop_key).has(class_element.kind)) + if (entry[class_element.kind]) reportError( SyntaxError, - `a '${class_element.kind}' method for '${escodegen.generate( + `a '${class_element.kind}' method for '${this.nameOfKey( class_element.key )}' has already been defined.`, this.filename, - class_element.loc + class_element.loc ?? undefined ); if (class_element.kind === "set") { - if (class_element.value.params.length > 0) { - let last_param = - class_element.value.params[class_element.value.params.length - 1]; - if (last_param.type == b.RestElement) - reportError( - SyntaxError, - "Setters are not allowed to have a rest", - this.filename, - last_param.loc - ); - } - } - - // XXX this doesn't work for properties where one accessor is computed and the other isn't... - let computed = class_element.computed; - - if (property_map.get(prop_key).has("computed")) { - if (computed != property_map.get(prop_key).get("computed")) + const params = class_element.value.params; + const last_param = params[params.length - 1]; + if (last_param && last_param.type === "RestElement") reportError( - Error, - "unsupported mismatch computed state for property accessors", + SyntaxError, + "Setters are not allowed to have a rest", this.filename, - class_element.loc + last_param.loc ?? undefined ); } - property_map.get(prop_key).set(class_element.kind, class_element); + // XXX this doesn't work for properties where one accessor + // is computed and the other isn't... + if (entry.computed !== (class_element.computed === true)) + reportError( + Error, + "unsupported mismatch computed state for property accessors", + this.filename, + class_element.loc ?? undefined + ); - property_map.get(prop_key).set("computed", computed); + entry[class_element.kind] = class_element; + } else { + reportError( + Error, + `unhandled class element kind '${class_element.kind}'`, + this.filename, + class_element.loc ?? undefined + ); } } - return [properties, methods, sproperties, smethods]; + return { properties, methods, sproperties, smethods }; } - create_constructor(ast_method, ast_class) { + private create_constructor( + ast_method: e.MethodDefinition, + ast_class: NamedClass + ): e.FunctionDeclaration { // fresh id: ast_class.id is the outer let declarator's node return b.functionDeclaration( b.identifier(ast_class.id.name), ast_method.value.params, ast_method.value.body, - ast_method.value.defaults, - ast_method.value.rest + ast_method.value.defaults ); } - create_default_constructor(ast_class) { + private create_default_constructor(ast_class: NamedClass): e.MethodDefinition { // splat args into the call to super's ctor if there's a superclass - let args_id = b.identifier("args"); - let functionBody = b.blockStatement( + const args_id = b.identifier("args"); + const functionBody = b.blockStatement( ast_class.superClass - ? [b.expressionStatement(intrinsic(constructSuperApply_id, [freshSuper(), args_id]))] + ? [ + b.expressionStatement( + intrinsic(constructSuperApply_id, [freshSuper(), args_id]) + ), + ] : [] ); return b.methodDefinition( @@ -371,26 +378,28 @@ export class DesugarClasses extends TransformPass { ); } - nameOfKey(key) { - return key.type == b.Identifier ? key.name : key.value; + private nameOfKey(key: e.Expression): string { + return key.type === "Identifier" ? key.name : String((key as e.Literal).value); } - create_proto_method(ast_method, ast_class) { - let method_name = this.nameOfKey(ast_method.key); - let method_key = ast_method.computed ? ast_method.key : b.literal(method_name); - let method = b.functionExpression( + private create_proto_method( + ast_method: e.MethodDefinition, + ast_class: NamedClass + ): e.Statement { + const method_name = this.nameOfKey(ast_method.key); + const method_key = ast_method.computed ? ast_method.key : b.literal(method_name); + const method = b.functionExpression( b.identifier(`${ast_class.id.name}:${method_name}`), ast_method.value.params, ast_method.value.body, - ast_method.value.defaults, - ast_method.value.rest + ast_method.value.defaults ); // b.functionExpression hardcodes generator: false — losing the // flag here left `*method() {}` yields undesugared method.generator = ast_method.value.generator; - let Object_defineProperty = b.memberExpression(Object_id, defineProperty_id); - let defineProperty_args = b.objectExpression([ + const Object_defineProperty = b.memberExpression(Object_id, defineProperty_id); + const defineProperty_args = b.objectExpression([ b.property(value_id, method), b.property(enumerable_id, b.literal(false)), ]); @@ -399,20 +408,22 @@ export class DesugarClasses extends TransformPass { ); } - create_static_method(ast_method, ast_class) { - let method_name = this.nameOfKey(ast_method.key); - let method_key = ast_method.computed ? ast_method.key : b.literal(method_name); - let method = b.functionExpression( - ast_method.key, + private create_static_method( + ast_method: e.MethodDefinition, + ast_class: NamedClass + ): e.Statement { + const method_name = this.nameOfKey(ast_method.key); + const method_key = ast_method.computed ? ast_method.key : b.literal(method_name); + const method = b.functionExpression( + ast_method.key.type === "Identifier" ? ast_method.key : null, ast_method.value.params, ast_method.value.body, - ast_method.value.defaults, - ast_method.value.rest + ast_method.value.defaults ); method.generator = ast_method.value.generator; - let Object_defineProperty = b.memberExpression(Object_id, defineProperty_id); - let defineProperty_args = b.objectExpression([ + const Object_defineProperty = b.memberExpression(Object_id, defineProperty_id); + const defineProperty_args = b.objectExpression([ b.property(value_id, method), b.property(enumerable_id, b.literal(false)), ]); @@ -425,15 +436,19 @@ export class DesugarClasses extends TransformPass { ); } - create_properties(properties, ast_class, are_static) { - let propdescs = []; + private create_properties( + properties: Map, + ast_class: NamedClass, + are_static: boolean + ): e.Statement | null { + const propdescs: e.Property[] = []; - properties.forEach((prop_map) => { - let accessors = []; - let key = null; + properties.forEach((entry) => { + const accessors: e.Property[] = []; + let key: e.Expression | null = null; - let getter = prop_map.get("get"); - let setter = prop_map.get("set"); + const getter = entry.get; + const setter = entry.set; // the map key is a name for non-computed accessors (so a // get/set pair shares an entry); the emitted property key is @@ -448,22 +463,15 @@ export class DesugarClasses extends TransformPass { } propdescs.push( - b.property( - key, - b.objectExpression(accessors), - "init", - prop_map.get("computed") == true - ) + b.property(key!, b.objectExpression(accessors), "init", entry.computed) ); }); if (propdescs.length === 0) return null; - let propdescs_literal = b.objectExpression(propdescs); + const propdescs_literal = b.objectExpression(propdescs); - let target; - if (are_static) target = b.identifier(ast_class.id.name); - else target = b.identifier("proto"); + const target = are_static ? b.identifier(ast_class.id.name) : b.identifier("proto"); return b.expressionStatement( b.callExpression(b.memberExpression(Object_id, defineProperties_id), [ From 3e244e0999a1a62cefff89b9e8b909cc1eaa5811 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 18:32:05 -0700 Subject: [PATCH 060/146] ts: desugar driver, gather-imports; vendored-dependency declarations MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The vendored external-deps JS gets hand-written surface declarations (esprima-es6.d.ts, escodegen-es6.d.ts — typed against our estree dialect via relative imports), staged into the tsc sandbox by the tsjs genrule, so compiler .ts files can keep their runtime-resolved relative imports and still typecheck strictly. desugar.ts types the pass list (PassConstructor over CompilerOptions/ filename/modules) and the self-hosted __ejs GC-stats global. gather-imports.ts gives the .ejs manifest its NativeManifest interface (link_flags/module_file are a string or a per-triple map — the port's first draft guessed arrays and stage1 caught it immediately), passes `triple` through to submodule registration (previously dropped), and sheds the dead ModuleDeclaration/declarator-array handling. The reflective var-hoisting walker keeps `unknown` for its object-graph recursion — the second legitimate seam besides catch guards. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- external-deps/BUCK | 2 + lib/BUCK | 1 + lib/buck-gen-tsjs.sh | 10 + lib/{desugar.js => desugar.ts} | 54 +++- lib/passes/gather-imports.js | 460 -------------------------------- lib/passes/gather-imports.ts | 469 +++++++++++++++++++++++++++++++++ 6 files changed, 522 insertions(+), 474 deletions(-) rename lib/{desugar.js => desugar.ts} (62%) delete mode 100644 lib/passes/gather-imports.js create mode 100644 lib/passes/gather-imports.ts diff --git a/external-deps/BUCK b/external-deps/BUCK index 85690bbc..84b08538 100644 --- a/external-deps/BUCK +++ b/external-deps/BUCK @@ -92,7 +92,9 @@ filegroup( name = "compiler-js", srcs = glob([ "esprima/esprima-es6.js", + "esprima/esprima-es6.d.ts", "escodegen/escodegen-es6.js", + "escodegen/escodegen-es6.d.ts", "estraverse/estraverse-es6.js", "esutils/esutils-es6.js", "esutils/lib/*.js", diff --git a/lib/BUCK b/lib/BUCK index c65960c5..889d2ea9 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -30,6 +30,7 @@ genrule( ) + [ "buck-gen-tsjs.sh", "//:ejs-es6.js", + "//external-deps:compiler-js", ], out = "tsjs", cmd = "bash $SRCDIR/buck-gen-tsjs.sh", diff --git a/lib/buck-gen-tsjs.sh b/lib/buck-gen-tsjs.sh index 5f9ffe1e..9a0a4fa2 100644 --- a/lib/buck-gen-tsjs.sh +++ b/lib/buck-gen-tsjs.sh @@ -37,6 +37,16 @@ for f in ejs-es6.js ejs-es6.ts; do if [ -e "$f" ]; then cp "$f" "$STAGE/$f"; fi done +# hand-written surface declarations for the vendored external-deps JS +# (relative imports like ../../external-deps/escodegen/escodegen-es6 +# typecheck against these; the .js resolves at runtime) +if [ -d compiler-js ]; then + (cd compiler-js && find . -name "*.d.ts" | while read -r f; do + mkdir -p "$STAGE/external-deps/$(dirname "$f")" + cp "$f" "$STAGE/external-deps/$f" + done) +fi + # copy the .js files through (cd "$STAGE" && find . -name "*.js" | while read -r f; do mkdir -p "$OUTABS/$(dirname "$f")" diff --git a/lib/desugar.js b/lib/desugar.ts similarity index 62% rename from lib/desugar.js rename to lib/desugar.ts index 3e62752a..fcc29658 100644 --- a/lib/desugar.js +++ b/lib/desugar.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ import { DesugarClasses } from "./passes/desugar-classes"; @@ -8,13 +8,24 @@ import { DesugarGeneratorFunctions } from "./passes/desugar-generator-functions" import { DesugarSpread } from "./passes/desugar-spread"; import { DesugarMetaProperties } from "./passes/desugar-metaproperties"; import { HoistFuncDecls } from "./passes/hoist-func-decls"; +import { TransformPass } from "./node-visitor"; import * as escodegen from "../external-deps/escodegen/escodegen-es6"; import * as debug from "./debug"; +import type { Program } from "./estree"; +import type { CompilerOptions } from "./options"; +import type { ModuleInfo } from "./module-info"; + +type PassConstructor = new ( + options: CompilerOptions, + filename: string, + modules: Map +) => TransformPass; + // the AST->AST desugar passes that run before EIR collection: constructs // EIR has no native lowering for arrive there as %-intrinsic calls, which -// lower through lib/eir/intrinsics.js. +// lower through lib/eir/intrinsics.ts. // // DesugarClasses, then DesugarDestructuring, then // DesugarGeneratorFunctions, then DesugarSpread: super(...args) desugars @@ -28,7 +39,7 @@ import * as debug from "./debug"; // same-name redeclarations collapse to the last one; at the toplevel it // also moves the closure slot stores to the top, where hoisting says // they belong. -const pre_eir_passes = [ +const pre_eir_passes: PassConstructor[] = [ DesugarClasses, DesugarDestructuring, DesugarGeneratorFunctions, @@ -37,13 +48,23 @@ const pre_eir_passes = [ HoistFuncDecls, ]; -function runPasses(passList, tree, filename, modules, options) { - passList.forEach((passType) => { - if (!passType) return; +// the self-hosted runtime exposes GC statistics through a global +declare const __ejs: + | { GC: { dumpAllocationStats(tag: string): void } } + | undefined; + +function runPasses( + passList: PassConstructor[], + tree: Program, + filename: string, + modules: Map, + options: CompilerOptions +): Program { + for (const passType of passList) { try { debug.time(2, passType.name); - let pass = new passType(options, filename, modules); - tree = pass.visit(tree); + const pass = new passType(options, filename, modules); + tree = pass.visit(tree) as Program; debug.timeEnd(2, passType.name); if (options.debug_passes.has(passType.name)) { console.log(`after: ${passType.name}`); @@ -53,20 +74,25 @@ function runPasses(passList, tree, filename, modules, options) { debug.log(2, `after: ${passType.name}`); debug.log(2, () => escodegen.generate(tree)); debug.log(3, () => { - if (typeof __ejs != "undefined") - __ejs.GC.dumpAllocationStats(`after ${passType.name}`); + if (typeof __ejs != "undefined") __ejs.GC.dumpAllocationStats(`after ${passType.name}`); + return ""; }); } catch (e) { debug.log(2, `exception in pass ${passType.name}`); - debug.log(2, e); + debug.log(2, String(e)); throw e; } - }); + } return tree; } // runs in compile() before collectEIRToplevel -export function preEIRConvert(tree, filename, modules, options) { +export function preEIRConvert( + tree: Program, + filename: string, + modules: Map, + options: CompilerOptions +): Program { return runPasses(pre_eir_passes, tree, filename, modules, options); } diff --git a/lib/passes/gather-imports.js b/lib/passes/gather-imports.js deleted file mode 100644 index 50f447a8..00000000 --- a/lib/passes/gather-imports.js +++ /dev/null @@ -1,460 +0,0 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: - */ - -// this class does two things -// -// 1. rewrites all sources to be relative to this.toplevel_path. i.e. if -// the following directory structure exists: -// -// externals/ -// ext1.js -// root/ -// main.js (contains: import { foo } from "modules/foo" ) -// modules/ -// foo1.js (contains: module ext1 from "../../externals/ext1") -// -// $PWD = root/ -// -// $ ejs main.js -// -// ejs will rewrite module paths such that main.js is unchanged, and -// foo1.js's module declaration reads: -// -// "../externals/ext1" -// -// 2. builds up a list (this.importList) containing the list of all -// imported modules -// - -import { reportError } from "../errors"; -import * as path from "@node-compat/path"; -import * as fs from "@node-compat/fs"; -import { TreeVisitor } from "../node-visitor"; -import { startGenerator, is_intrinsic, is_string_literal, underline } from "../echo-util"; -import { JSModuleInfo, NativeModuleInfo } from "../module-info"; -import * as b from "../ast-builder"; -import * as esprima from "../../external-deps/esprima/esprima-es6"; - -let hasOwn = Object.prototype.hasOwnProperty; - -function isNativeModule(source) { - return source[0] === "@"; -} - -let allModules = new Map(); -let nativeModules = new Map(); - -class GatherImports extends TreeVisitor { - constructor(filename, p, toplevel_path, import_vars) { - super(); - this.filename = filename; - this.path = p; - this.toplevel_path = toplevel_path; - this.import_vars = import_vars; - - this.importList = []; - // remove our .js suffix since all imports are suffix-free - if (path.extname(this.filename) === ".js") { - this.filename = this.filename.substring(0, this.filename.length - 3); - } - - this.moduleInfo = new JSModuleInfo(this.filename); - allModules.set(this.filename, this.moduleInfo); - } - - addSource(n) { - if (!n.source) return n; - - if (!is_string_literal(n.source)) throw new Error("import sources must be strings"); - - let source_path = n.source.value; - - for (let v of this.import_vars) { - source_path = source_path.replace(`$${v.variable}`, v.value); - } - - if (isNativeModule(source_path)) { - if (this.importList.indexOf(source_path) === -1) this.importList.push(source_path); - this.moduleInfo.addImportSource(source_path); - - n.source_path = b.literal(source_path); - return n; - } - - if (source_path[0] !== "/") - source_path = path.resolve(this.toplevel_path, this.path, source_path); - - if (source_path.indexOf(process.cwd()) === 0) - source_path = path.relative(process.cwd(), source_path); - - if (this.importList.indexOf(source_path) === -1) this.importList.push(source_path); - this.moduleInfo.addImportSource(source_path); - - n.source_path = b.literal(source_path); - return n; - } - - addDefaultExport(path) { - this.moduleInfo.addExport("default"); - this.moduleInfo.setHasDefaultExport(); - } - - addExportIdentifier(id, constval) { - if (id === "default") this.moduleInfo.setHasDefaultExport(); - this.moduleInfo.addExport(id, constval); - } - - visitImportDeclaration(n) { - return this.addSource(n); - } - - visitExportDefaultDeclaration(n) { - // XXX more here? - this.addDefaultExport(); - } - - visitExportNamedDeclaration(n) { - if (n.declaration && (n.specifiers.length > 0 || n.source)) { - reportError(Error, "invalid state in ExportNamedDeclaration", this.filename, n.loc); - } - - n = this.addSource(n); - - if (n.specifiers.length > 0) { - for (let spec of n.specifiers) { - this.addExportIdentifier(spec.exported.name); - } - } else if (n.declaration) { - let declaration = n.declaration; - if (Array.isArray(declaration)) { - for (let decl of declaration) { - this.addExportIdentifier(decl.id.name); - } - } else if (declaration.type === b.FunctionDeclaration) { - this.addExportIdentifier(declaration.id.name); - } else if (declaration.type === b.ClassDeclaration) { - this.addExportIdentifier(declaration.id.name); - } else if (declaration.type === b.VariableDeclaration) { - for (let decl of declaration.declarations) { - this.addExportIdentifier( - decl.id.name, - declaration.kind === "const" && decl.init.type === b.Literal - ? decl.init - : undefined - ); - } - } else if (declaration.type === b.VariableDeclarator) { - this.addExportIdentifier(declaration.id.name); - } else { - throw new Error("unhandled case in visitExportNamedDeclaration"); - } - } else { - throw new Error("unhandled case in visitExportNamedDeclaration"); - } - } - - visitExportAllDeclaration(n) { - throw new Error("GatherImports#visitExportAllDeclaration unimplemented"); - } - - visitModuleDeclaration(n) { - return this.addSource(n); - } -} - -export function getAllModules() { - return allModules; -} - -function dumpModule(m) { - console.log(`'${m.path}'`); - console.log(` has default: ${m.hasDefaultExport()}`); - if (m.exports.size > 0) { - console.log(" slots:"); - m.exports.forEach((v, k) => { - console.log(` ${k}: ${v.slot_num}`); - }); - } -} - -export function dumpModules() { - console.log(underline("modules")); - allModules.forEach((m) => dumpModule(m)); -} - -// promote non-exported module-level vars to hidden module slots. both -// the legacy pipeline (via the DesugarImportExport rewrite to -// %moduleSetSlot + new-cc's ModuleSlotBinding) and the EIR pipeline (via -// module_slot_load/store) then use the same storage, so functions -// referencing mutable module state can compile on either path. -// -// only DIRECT toplevel declarations promote. a `var` re-declaration of -// the same name nested inside a toplevel statement (`if (x) { var state -// = ... }`) shares the binding but wouldn't be rewritten, so any name -// with such a nested declaration is excluded entirely. `const name = -// ` stays a plain local: it constant-folds instead. -function promoteModuleVars(moduleInfo, tree) { - // debugging: EJS_NO_PROMOTE=substr1,substr2 disables promotion for - // matching module paths (bisecting promotion-related miscompiles) - let no_promote = process.env.EJS_NO_PROMOTE; - if (no_promote) { - for (let pat of no_promote.split(",")) { - if (pat.length > 0 && moduleInfo.path.indexOf(pat) !== -1) return; - } - } - // names declared by `var` nested below a direct toplevel statement - // (but outside any function -- function bodies are their own scope) - let nestedVarNames = new Set(); - let walkNested = (n) => { - if (!n || typeof n !== "object") return; - if (Array.isArray(n)) { - for (let el of n) walkNested(el); - return; - } - if ( - n.type === b.FunctionDeclaration || - n.type === b.FunctionExpression || - n.type === b.ArrowFunctionExpression - ) - return; - if (n.type === b.VariableDeclaration && n.kind === "var") { - for (let d of n.declarations) { - if (d.id.type === b.Identifier) nestedVarNames.add(d.id.name); - } - } - for (let k of Object.keys(n)) { - if (k === "loc") continue; - walkNested(n[k]); - } - }; - for (let stmt of tree.body) { - if (stmt.type === b.VariableDeclaration) continue; // direct: handled below - walkNested(stmt); - } - - for (let stmt of tree.body) { - if (stmt.type === b.VariableDeclaration) { - for (let d of stmt.declarations) { - if (d.id.type !== b.Identifier) continue; - if (moduleInfo.exports.has(d.id.name)) continue; // already slotted - if (nestedVarNames.has(d.id.name)) continue; - if (stmt.kind === "const" && d.init && d.init.type === b.Literal) continue; - moduleInfo.addPromotedSlot(d.id.name); - } - } else if (stmt.type === b.ClassDeclaration && stmt.id) { - // classes don't hoist, so the setSlot rewrite at the source - // position is exactly their declaration semantics - if (moduleInfo.exports.has(stmt.id.name)) continue; - if (nestedVarNames.has(stmt.id.name)) continue; - moduleInfo.addPromotedSlot(stmt.id.name); - } else if (stmt.type === b.FunctionDeclaration && stmt.id) { - // function declarations promote too: their slot holds the one - // closure, so references from either pipeline (calls to - // fallen-back siblings, value uses, `new Foo()`) resolve - // identically. the declaration becomes a %moduleSetSlot at - // its source position, so -- exactly like exported functions - // today -- hoisting across toplevel *initialization* code is - // lost. - if (moduleInfo.exports.has(stmt.id.name)) continue; - if (nestedVarNames.has(stmt.id.name)) continue; - moduleInfo.addPromotedSlot(stmt.id.name); - } - } -} - -function gatherImports(filename, path, top_path, tree, import_vars) { - let visitor = new GatherImports(filename, path, top_path, import_vars); - visitor.visit(tree); - promoteModuleVars(visitor.moduleInfo, tree); - return visitor.importList; -} - -function parseFile(filename, content, options) { - try { - if (!options.quiet) { - // loop over import variables, replacing their values with - // their names for output - let output_name = filename; - for (let ivar of options.import_variables) { - output_name = output_name.replace(ivar.value, `$${ivar.variable}`); - } - options.stdout_writer.write(`PARSE ${output_name}`); - } - // NOT tolerant: true — tolerant mode collects parse errors into - // ast.errors and returns a partial AST, which we would then - // silently miscompile (e.g. `async m() {}` object methods - // compiled to nonsense). a program that doesn't parse must fail - // loudly here. sourceType "module" is what makes import/export - // parse at all (tolerant mode used to recover past the spurious - // script-mode error on every import) and, per spec, makes the - // parse strict. - return esprima.parse(content, { loc: true, raw: true, sourceType: "module" }); - } catch (e) { - console.warn(`${filename}: ${e}:`); - process.exit(-1); - } -} - -function getModuleFile(module_info, triple) { - if (typeof module_info.module_file == "string") { - return module_info.module_file; - } - const module_file_key = triple.toShortString(); - if (!module_info.module_file[module_file_key]) { - throw new Error( - `module ${module_info.module_name} doesn't have a module file for ${module_file_key}` - ); - } - return module_info.module_file[module_file_key]; -} - -function getModuleLinkFlags(module_info, triple) { - if (typeof module_info.link_flags == "string") { - return module_info.link_flags; - } - const module_file_key = triple.toShortString(); - if (!module_info.link_flags[module_file_key]) { - throw new Error( - `module ${module_info.module_name} doesn't have a link flags for ${module_file_key}` - ); - } - return module_info.link_flags[module_file_key]; -} - -function registerNativeModuleInfo( - ejs_dir, - module_name, - link_flags, - module_files, - module_info, - triple -) { - if (module_info.link_flags) - link_flags = link_flags.concat(getModuleLinkFlags(module_info, triple)); - if (module_info.module_file) - module_files = module_files.concat(getModuleFile(module_info, triple)); - - if (module_info.init_function) { - // this module can be imported - let m = new NativeModuleInfo( - module_name, - module_info.init_function, - link_flags, - module_files, - ejs_dir - ); - if (module_info.exports) module_info.exports.forEach((v) => m.addExport(v)); - - nativeModules.set(module_name, m); - } - if (module_info.submodules) { - for (let sm of module_info.submodules) { - if (!sm.module_name) - throw new Error(`${module_name} submodule missing module_name property`); - registerNativeModuleInfo( - ejs_dir, - `${module_name}/${sm.module_name}`, - link_flags, - module_files, - sm - ); - } - } -} - -function gatherNativeModuleInfo(ejs_file, triple) { - let module_info = JSON.parse(fs.readFileSync(ejs_file, "utf-8")); - let module_name = module_info.module_name || path.basename(ejs_file, ".ejs"); - - registerNativeModuleInfo(path.dirname(ejs_file), module_name, [], [], module_info, triple); -} - -function gatherAllNativeModules(module_dirs, triple) { - // gather a list of all native modules, flattening their submodule lists - for (let mdir of module_dirs) { - try { - let files = fs.readdirSync(mdir); - files.forEach((f) => { - if (path.extname(f) === ".ejs") { - try { - gatherNativeModuleInfo(path.resolve(mdir, f), triple); - } catch (e) { - console.warn(`parsing of module file ${f} failed: ${e}`); - } - } - }); - } catch (e) {} - } -} - -export function gatherAllModules(file_args, options, triple) { - let work_list = file_args.slice(); - let files = []; - - gatherAllNativeModules(options.native_module_dirs, triple); - - // starting at the main file, gather all files we'll need - while (work_list.length !== 0) { - let file = work_list.pop(); - - let found = false; - let jsfile = file; - if (path.extname(jsfile) !== ".js") { - jsfile = jsfile + ".js"; - } - - try { - found = fs.statSync(jsfile).isFile(); - } catch (e) { - found = false; - } - - if (!found) { - try { - if (fs.statSync(file).isDirectory()) { - jsfile = path.join(file, "index.js"); - found = fs.statSync(jsfile).isFile(); - } - } catch (e) { - found = false; - } - } - - if (found) { - let file_contents = fs.readFileSync(jsfile, "utf-8"); - let file_ast = parseFile(jsfile, file_contents, options); - - let imports = gatherImports( - file, - path.dirname(jsfile), - process.cwd(), - file_ast, - options.import_variables - ); - - files.push({ file_name: file, file_ast: file_ast }); - - for (let i of imports) { - if (work_list.indexOf(i) === -1 && !files.some((el) => el.file_name === i)) { - work_list.push(i); - } - } - } else { - // check if the file is a native module - if (!allModules.has(file)) { - if (file[0] != "@") { - throw new Error(`module ${file} not found`); - } - let native_path = file.slice(1); - if (!nativeModules.has(native_path)) { - throw new Error(`native module ${file} not found`); - } - - allModules.set(file, nativeModules.get(native_path)); - } - } - } - - return files; -} diff --git a/lib/passes/gather-imports.ts b/lib/passes/gather-imports.ts new file mode 100644 index 00000000..996d60ed --- /dev/null +++ b/lib/passes/gather-imports.ts @@ -0,0 +1,469 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// this pass does two things +// +// 1. rewrites all sources to be relative to the toplevel path, recording +// the resolved path on each import/export node as `source_path`; +// +// 2. builds up the module graph: a ModuleInfo per JS module (exports, +// slots, import list) plus the native-module registry parsed from +// .ejs manifests. + +import { reportError } from "../errors"; +import * as path from "@node-compat/path"; +import * as fs from "@node-compat/fs"; +import { TreeVisitor, VisitResult } from "../node-visitor"; +import { is_string_literal, underline } from "../echo-util"; +import { JSModuleInfo, NativeModuleInfo, ModuleInfo } from "../module-info"; +import * as b from "../ast-builder"; +import * as esprima from "../../external-deps/esprima/esprima-es6"; +import type * as e from "../estree"; +import type { CompilerOptions, ImportVariable } from "../options"; +import type { Triple } from "../triple"; + +function isNativeModule(source: string): boolean { + return source[0] === "@"; +} + +const allModules = new Map(); +const nativeModules = new Map(); + +type SourcedNode = e.ImportDeclaration | e.ExportNamedDeclaration | e.ExportAllDeclaration; + +class GatherImports extends TreeVisitor { + filename: string; + path: string; + toplevel_path: string; + import_vars: ImportVariable[]; + importList: string[] = []; + moduleInfo: JSModuleInfo; + + constructor(filename: string, p: string, toplevel_path: string, import_vars: ImportVariable[]) { + super(); + this.filename = filename; + this.path = p; + this.toplevel_path = toplevel_path; + this.import_vars = import_vars; + + // remove our .js suffix since all imports are suffix-free + if (path.extname(this.filename) === ".js") { + this.filename = this.filename.substring(0, this.filename.length - 3); + } + + this.moduleInfo = new JSModuleInfo(this.filename); + allModules.set(this.filename, this.moduleInfo); + } + + private addSource(n: T): T { + if (!n.source) return n; + + if (!is_string_literal(n.source)) throw new Error("import sources must be strings"); + + let source_path = String(n.source.value); + + for (const v of this.import_vars) { + source_path = source_path.replace(`$${v.variable}`, v.value); + } + + if (!isNativeModule(source_path)) { + if (source_path[0] !== "/") + source_path = path.resolve(this.toplevel_path, this.path, source_path); + + if (source_path.indexOf(process.cwd()) === 0) + source_path = path.relative(process.cwd(), source_path); + } + + if (this.importList.indexOf(source_path) === -1) this.importList.push(source_path); + this.moduleInfo.addImportSource(source_path); + + n.source_path = b.literal(source_path) as e.Literal & { value: string }; + return n; + } + + private addExportIdentifier(id: string, constval?: e.Literal): void { + if (id === "default") this.moduleInfo.setHasDefaultExport(); + this.moduleInfo.addExport(id, constval); + } + + override visitImportDeclaration(n: e.ImportDeclaration): VisitResult { + return this.addSource(n); + } + + override visitExportDefaultDeclaration(n: e.ExportDefaultDeclaration): VisitResult { + this.moduleInfo.addExport("default"); + this.moduleInfo.setHasDefaultExport(); + return n; + } + + override visitExportNamedDeclaration(n: e.ExportNamedDeclaration): VisitResult { + if (n.declaration && (n.specifiers.length > 0 || n.source)) { + reportError( + Error, + "invalid state in ExportNamedDeclaration", + this.filename, + n.loc ?? undefined + ); + } + + this.addSource(n); + + if (n.specifiers.length > 0) { + for (const spec of n.specifiers) { + this.addExportIdentifier(spec.exported.name); + } + return n; + } + + const declaration = n.declaration; + if (!declaration) throw new Error("unhandled case in visitExportNamedDeclaration"); + + if (declaration.type === "FunctionDeclaration" || declaration.type === "ClassDeclaration") { + this.addExportIdentifier(declaration.id.name); + } else if (declaration.type === "VariableDeclaration") { + for (const decl of declaration.declarations) { + if (decl.id.type !== "Identifier") continue; + this.addExportIdentifier( + decl.id.name, + declaration.kind === "const" && decl.init && decl.init.type === "Literal" + ? decl.init + : undefined + ); + } + } else { + throw new Error("unhandled case in visitExportNamedDeclaration"); + } + return n; + } + + override visitExportAllDeclaration(n: e.ExportAllDeclaration): VisitResult { + throw new Error("GatherImports#visitExportAllDeclaration unimplemented"); + } +} + +export function getAllModules(): Map { + return allModules; +} + +function dumpModule(m: ModuleInfo): void { + console.log(`'${m.path}'`); + console.log(` has default: ${m.hasDefaultExport()}`); + if (m.exports.size > 0) { + console.log(" slots:"); + m.exports.forEach((v, k) => { + console.log(` ${k}: ${v.slot_num}`); + }); + } +} + +export function dumpModules(): void { + console.log(underline("modules")); + allModules.forEach((m) => dumpModule(m)); +} + +// promote non-exported module-level vars to hidden module slots; the EIR +// pipeline routes references through module_slot_load/store, so functions +// referencing mutable module state see one shared storage. +// +// only DIRECT toplevel declarations promote. a `var` re-declaration of +// the same name nested inside a toplevel statement (`if (x) { var state +// = ... }`) shares the binding but wouldn't be rewritten, so any name +// with such a nested declaration is excluded entirely. `const name = +// ` stays a plain local: it constant-folds instead. +function promoteModuleVars(moduleInfo: ModuleInfo, tree: e.Program): void { + // debugging: EJS_NO_PROMOTE=substr1,substr2 disables promotion for + // matching module paths (bisecting promotion-related miscompiles) + const no_promote = process.env["EJS_NO_PROMOTE"]; + if (no_promote) { + for (const pat of no_promote.split(",")) { + if (pat.length > 0 && moduleInfo.path.indexOf(pat) !== -1) return; + } + } + // names declared by `var` nested below a direct toplevel statement + // (but outside any function -- function bodies are their own scope) + const nestedVarNames = new Set(); + const walkNested = (n: unknown): void => { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (const el of n) walkNested(el); + return; + } + const node = n as e.Node; + if ( + node.type === "FunctionDeclaration" || + node.type === "FunctionExpression" || + node.type === "ArrowFunctionExpression" + ) + return; + if (node.type === "VariableDeclaration" && node.kind === "var") { + for (const d of node.declarations) { + if (d.id.type === "Identifier") nestedVarNames.add(d.id.name); + } + } + for (const k of Object.keys(node)) { + if (k === "loc") continue; + walkNested((node as unknown as Record)[k]); + } + }; + for (const stmt of tree.body) { + if (stmt.type === "VariableDeclaration") continue; // direct: handled below + walkNested(stmt); + } + + for (const stmt of tree.body) { + if (stmt.type === "VariableDeclaration") { + for (const d of stmt.declarations) { + if (d.id.type !== "Identifier") continue; + if (moduleInfo.exports.has(d.id.name)) continue; // already slotted + if (nestedVarNames.has(d.id.name)) continue; + if (stmt.kind === "const" && d.init && d.init.type === "Literal") continue; + moduleInfo.addPromotedSlot(d.id.name); + } + } else if (stmt.type === "ClassDeclaration" && stmt.id) { + // classes don't hoist, so the setSlot rewrite at the source + // position is exactly their declaration semantics + if (moduleInfo.exports.has(stmt.id.name)) continue; + if (nestedVarNames.has(stmt.id.name)) continue; + moduleInfo.addPromotedSlot(stmt.id.name); + } else if (stmt.type === "FunctionDeclaration" && stmt.id) { + // function declarations promote too: their slot holds the one + // closure, so references (calls, value uses, `new Foo()`) + // resolve identically. the declaration becomes a slot store + // at its source position, so -- exactly like exported + // functions -- hoisting across toplevel *initialization* code + // is lost. + if (moduleInfo.exports.has(stmt.id.name)) continue; + if (nestedVarNames.has(stmt.id.name)) continue; + moduleInfo.addPromotedSlot(stmt.id.name); + } + } +} + +function gatherImports( + filename: string, + p: string, + top_path: string, + tree: e.Program, + import_vars: ImportVariable[] +): string[] { + const visitor = new GatherImports(filename, p, top_path, import_vars); + visitor.visit(tree); + promoteModuleVars(visitor.moduleInfo, tree); + return visitor.importList; +} + +function parseFile(filename: string, content: string, options: CompilerOptions): e.Program { + try { + if (!options.quiet) { + // loop over import variables, replacing their values with + // their names for output + let output_name = filename; + for (const ivar of options.import_variables) { + output_name = output_name.replace(ivar.value, `$${ivar.variable}`); + } + options.stdout_writer.write(`PARSE ${output_name}`); + } + // NOT tolerant: true — tolerant mode collects parse errors into + // ast.errors and returns a partial AST, which we would then + // silently miscompile (e.g. `async m() {}` object methods + // compiled to nonsense). a program that doesn't parse must fail + // loudly here. sourceType "module" is what makes import/export + // parse at all (tolerant mode used to recover past the spurious + // script-mode error on every import) and, per spec, makes the + // parse strict. + return esprima.parse(content, { loc: true, raw: true, sourceType: "module" }); + } catch (err) { + console.warn(`${filename}: ${String(err)}:`); + return process.exit(-1); + } +} + +// the .ejs manifest shape (JSON, one per native module) +interface NativeManifest { + module_name?: string; + init_function?: string; + link_flags?: string | Record; + module_file?: string | Record; + exports?: string[]; + submodules?: NativeManifest[]; +} + +function getModuleFile(manifest: NativeManifest, triple: Triple): string { + const module_file = manifest.module_file!; + if (typeof module_file == "string") { + return module_file; + } + const module_file_key = triple.toShortString(); + const file = module_file[module_file_key]; + if (!file) { + throw new Error( + `module ${manifest.module_name} doesn't have a module file for ${module_file_key}` + ); + } + return file; +} + +function getModuleLinkFlags(manifest: NativeManifest, triple: Triple): string { + const link_flags = manifest.link_flags!; + if (typeof link_flags === "string") { + return link_flags; + } + const module_file_key = triple.toShortString(); + const flags = link_flags[module_file_key]; + if (!flags) { + throw new Error( + `module ${manifest.module_name} doesn't have link flags for ${module_file_key}` + ); + } + return flags; +} + +function registerNativeModuleInfo( + ejs_dir: string, + module_name: string, + link_flags: string[], + module_files: string[], + manifest: NativeManifest, + triple: Triple +): void { + if (manifest.link_flags) + link_flags = link_flags.concat(getModuleLinkFlags(manifest, triple)); + if (manifest.module_file) module_files = module_files.concat(getModuleFile(manifest, triple)); + + if (manifest.init_function) { + // this module can be imported + const m = new NativeModuleInfo( + module_name, + manifest.init_function, + link_flags, + module_files, + ejs_dir + ); + if (manifest.exports) manifest.exports.forEach((v) => m.addExport(v)); + + nativeModules.set(module_name, m); + } + if (manifest.submodules) { + for (const sm of manifest.submodules) { + if (!sm.module_name) + throw new Error(`${module_name} submodule missing module_name property`); + registerNativeModuleInfo( + ejs_dir, + `${module_name}/${sm.module_name}`, + link_flags, + module_files, + sm, + triple + ); + } + } +} + +function gatherNativeModuleInfo(ejs_file: string, triple: Triple): void { + const manifest = JSON.parse(fs.readFileSync(ejs_file, "utf-8")) as NativeManifest; + const module_name = manifest.module_name || path.basename(ejs_file, ".ejs"); + + registerNativeModuleInfo(path.dirname(ejs_file), module_name, [], [], manifest, triple); +} + +function gatherAllNativeModules(module_dirs: string[], triple: Triple): void { + // gather a list of all native modules, flattening their submodule lists + for (const mdir of module_dirs) { + try { + const files = fs.readdirSync(mdir); + files.forEach((f) => { + if (path.extname(f) === ".ejs") { + try { + gatherNativeModuleInfo(path.resolve(mdir, f), triple); + } catch (err) { + console.warn(`parsing of module file ${f} failed: ${String(err)}`); + } + } + }); + } catch (err) { + // a missing module dir is fine + } + } +} + +export interface GatheredFile { + file_name: string; + file_ast: e.Program; +} + +export function gatherAllModules( + file_args: string[], + options: CompilerOptions, + triple: Triple +): GatheredFile[] { + const work_list = file_args.slice(); + const files: GatheredFile[] = []; + + gatherAllNativeModules(options.native_module_dirs, triple); + + // starting at the main file, gather all files we'll need + while (work_list.length !== 0) { + const file = work_list.pop()!; + + let found = false; + let jsfile = file; + if (path.extname(jsfile) !== ".js") { + jsfile = jsfile + ".js"; + } + + try { + found = fs.statSync(jsfile).isFile(); + } catch (err) { + found = false; + } + + if (!found) { + try { + if (fs.statSync(file).isDirectory()) { + jsfile = path.join(file, "index.js"); + found = fs.statSync(jsfile).isFile(); + } + } catch (err) { + found = false; + } + } + + if (found) { + const file_contents = fs.readFileSync(jsfile, "utf-8"); + const file_ast = parseFile(jsfile, file_contents, options); + + const imports = gatherImports( + file, + path.dirname(jsfile), + process.cwd(), + file_ast, + options.import_variables + ); + + files.push({ file_name: file, file_ast: file_ast }); + + for (const i of imports) { + if (work_list.indexOf(i) === -1 && !files.some((el) => el.file_name === i)) { + work_list.push(i); + } + } + } else { + // check if the file is a native module + if (!allModules.has(file)) { + if (file[0] != "@") { + throw new Error(`module ${file} not found`); + } + const native_path = file.slice(1); + const native = nativeModules.get(native_path); + if (!native) { + throw new Error(`native module ${file} not found`); + } + + allModules.set(file, native); + } + } + } + + return files; +} From 2588c1f6e26b1950281aaa666cd18d17718c59c5 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 18:38:55 -0700 Subject: [PATCH 061/146] =?UTF-8?q?ts:=20runtime=20=E2=80=94=20the=20C-run?= =?UTF-8?q?time=20interface=20table,=20fully=20key-typed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The 83 extern-declaration thunks get `this: RuntimeContext` typing and the table is `satisfies`-checked; RuntimeInterface is a mapped type over the table's own keys with per-key ReturnType, so downstream consumers (the EIR emitter, compiler scaffolding) get exact-key completion/checking on rt.* instead of a stringly bag. The binop/atom/ global/symbol getter interfaces keep their lazy Object.create shape behind Record types. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/{runtime.js => runtime.ts} | 225 ++++++++++++++++++--------------- 1 file changed, 121 insertions(+), 104 deletions(-) rename lib/{runtime.js => runtime.ts} (82%) diff --git a/lib/runtime.js b/lib/runtime.ts similarity index 82% rename from lib/runtime.js rename to lib/runtime.ts index 56847d42..455a5bbe 100644 --- a/lib/runtime.js +++ b/lib/runtime.ts @@ -1,17 +1,30 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ +// The compiler's window into the C runtime: every entry declares one +// extern function (or global) with its LLVM signature. Interfaces are +// built as getter objects so a function is only declared in a module +// when something actually references it. + import * as ty from "./types"; +import * as llvm from "@llvm"; +import type { ABI } from "./abi"; + +const takes_builtins = ty.takes_builtins; +const does_not_throw = ty.does_not_throw; +const does_not_access_memory = ty.does_not_access_memory; +const only_reads_memory = ty.only_reads_memory; +const returns_ejsval_bool = ty.returns_ejsval_bool; -let takes_builtins = ty.takes_builtins; -let does_not_throw = ty.does_not_throw; -let does_not_access_memory = ty.does_not_access_memory; -let only_reads_memory = ty.only_reads_memory; -let returns_ejsval_bool = ty.returns_ejsval_bool; +// getters run with the interface object (module + abi) as `this` +export interface RuntimeContext { + module: llvm.Module; + abi: ABI; +} const runtime_interface = { - personality: function () { + personality: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "__ejs_personality_v0", ty.Int32, [ ty.Int32, ty.Int32, @@ -21,17 +34,17 @@ const runtime_interface = { ]); }, - module_resolve: function () { + module_resolve: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_module_resolve", ty.Void, [ ty.EjsModule.pointerTo(), ]); }, - module_get: function () { + module_get: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_module_get", ty.EjsValue, [ ty.EjsValue, ]); }, - module_get_slot_ref: function () { + module_get_slot_ref: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_module_get_slot_ref", @@ -39,7 +52,7 @@ const runtime_interface = { [ty.EjsModule.pointerTo(), ty.Int32] ); }, - module_add_export_accessors: function () { + module_add_export_accessors: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_module_add_export_accessors", @@ -53,7 +66,7 @@ const runtime_interface = { ); }, - invoke_closure: function () { + invoke_closure: function (this: RuntimeContext) { return takes_builtins( this.abi.createExternalFunction(this.module, "_ejs_invoke_closure", ty.EjsValue, [ ty.EjsValue, @@ -64,7 +77,7 @@ const runtime_interface = { ]) ); }, - construct_closure: function () { + construct_closure: function (this: RuntimeContext) { return takes_builtins( this.abi.createExternalFunction(this.module, "_ejs_construct_closure", ty.EjsValue, [ ty.EjsValue, @@ -75,7 +88,7 @@ const runtime_interface = { ]) ); }, - construct_closure_apply: function () { + construct_closure_apply: function (this: RuntimeContext) { return takes_builtins( this.abi.createExternalFunction( this.module, @@ -92,7 +105,7 @@ const runtime_interface = { ); }, - set_constructor_kind_derived: function () { + set_constructor_kind_derived: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_function_set_derived_constructor", @@ -100,7 +113,7 @@ const runtime_interface = { [ty.EjsValue] ); }, - set_constructor_kind_base: function () { + set_constructor_kind_base: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_function_set_base_constructor", @@ -109,14 +122,14 @@ const runtime_interface = { ); }, - make_closure: function () { + make_closure: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_function_new", ty.EjsValue, [ ty.EjsValue, ty.EjsValue, ty.getEjsClosureFunc(this.abi), ]); }, - make_closure_noenv: function () { + make_closure_noenv: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_function_new_without_env", @@ -124,19 +137,19 @@ const runtime_interface = { [ty.EjsValue, ty.getEjsClosureFunc(this.abi)] ); }, - make_anon_closure: function () { + make_anon_closure: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_function_new_anon", ty.EjsValue, [ ty.EjsValue, ty.getEjsClosureFunc(this.abi), ]); }, - make_closure_env: function () { + make_closure_env: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_closureenv_new", ty.EjsValue, [ ty.Int32, ]); }, - get_env_slot_val: function () { + get_env_slot_val: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_closureenv_get_slot", @@ -144,7 +157,7 @@ const runtime_interface = { [ty.EjsValue, ty.Int32] ); }, - get_env_slot_ref: function () { + get_env_slot_ref: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_closureenv_get_slot_ref", @@ -153,12 +166,12 @@ const runtime_interface = { ); }, - make_generator: function () { + make_generator: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_generator_new", ty.EjsValue, [ ty.EjsValue, ]); }, - generator_is_return_sentinel: function () { + generator_is_return_sentinel: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_generator_is_return_sentinel", @@ -166,7 +179,7 @@ const runtime_interface = { [ty.EjsValue] ); }, - generator_return_value: function () { + generator_return_value: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_generator_return_value", @@ -174,19 +187,19 @@ const runtime_interface = { [ty.EjsValue] ); }, - generator_yield: function () { + generator_yield: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_generator_yield", ty.EjsValue, [ ty.EjsValue, ty.EjsValue, ]); }, - object_create: function () { + object_create: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_object_create", ty.EjsValue, [ ty.EjsValue, ]); }, - arguments_new: function () { + arguments_new: function (this: RuntimeContext) { return does_not_throw( this.abi.createExternalFunction(this.module, "_ejs_arguments_new", ty.EjsValue, [ ty.Int32, @@ -194,19 +207,19 @@ const runtime_interface = { ]) ); }, - array_new: function () { + array_new: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_array_new", ty.EjsValue, [ ty.Int64, ty.Bool, ]); }, - array_new_copy: function () { + array_new_copy: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_array_new_copy", ty.EjsValue, [ ty.Int64, ty.EjsValue.pointerTo(), ]); }, - array_from_iterables: function () { + array_from_iterables: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_array_from_iterables", @@ -214,7 +227,7 @@ const runtime_interface = { [ty.Int32, ty.EjsValue.pointerTo()] ); }, - number_new: function () { + number_new: function (this: RuntimeContext) { return does_not_throw( does_not_access_memory( this.abi.createExternalFunction(this.module, "_ejs_number_new", ty.EjsValue, [ @@ -223,7 +236,7 @@ const runtime_interface = { ) ); }, - string_new_utf8: function () { + string_new_utf8: function (this: RuntimeContext) { return only_reads_memory( does_not_throw( this.abi.createExternalFunction(this.module, "_ejs_string_new_utf8", ty.EjsValue, [ @@ -232,27 +245,27 @@ const runtime_interface = { ) ); }, - regexp_new_utf8: function () { + regexp_new_utf8: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_regexp_new_utf8", ty.EjsValue, [ ty.String, ty.String, ]); }, - truthy: function () { + truthy: function (this: RuntimeContext) { return does_not_throw( does_not_access_memory( this.abi.createExternalFunction(this.module, "_ejs_truthy", ty.Bool, [ty.EjsValue]) ) ); }, - object_setprop: function () { + object_setprop: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_object_setprop", ty.EjsValue, [ ty.EjsValue, ty.EjsValue, ty.EjsValue, ]); }, - object_getprop: function () { + object_getprop: function (this: RuntimeContext) { return only_reads_memory( this.abi.createExternalFunction(this.module, "_ejs_object_getprop", ty.EjsValue, [ ty.EjsValue, @@ -260,13 +273,13 @@ const runtime_interface = { ]) ); }, - global_setprop: function () { + global_setprop: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_global_setprop", ty.EjsValue, [ ty.EjsValue, ty.EjsValue, ]); }, - global_getprop: function () { + global_getprop: function (this: RuntimeContext) { return only_reads_memory( this.abi.createExternalFunction(this.module, "_ejs_global_getprop", ty.EjsValue, [ ty.EjsValue, @@ -274,7 +287,7 @@ const runtime_interface = { ); }, - object_define_accessor_prop: function () { + object_define_accessor_prop: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_object_define_accessor_property", @@ -282,7 +295,7 @@ const runtime_interface = { [ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.Int32] ); }, - object_define_accessor_prop_desc: function () { + object_define_accessor_prop_desc: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_object_define_accessor_property_desc", @@ -290,7 +303,7 @@ const runtime_interface = { [ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.EjsValue, ty.Int32] ); }, - object_define_value_prop: function () { + object_define_value_prop: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_object_define_value_property", @@ -299,12 +312,12 @@ const runtime_interface = { ); }, - object_freeze: function () { + object_freeze: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_object_freeze", ty.EjsValue, [ ty.EjsValue, ]); }, - object_literal_set_proto: function () { + object_literal_set_proto: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_object_literal_set_proto", @@ -312,7 +325,7 @@ const runtime_interface = { [ty.EjsValue, ty.EjsValue] ); }, - object_set_prototype_of: function () { + object_set_prototype_of: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_object_set_prototype_of", @@ -320,7 +333,7 @@ const runtime_interface = { [ty.EjsValue, ty.EjsValue] ); }, - prop_iterator_new: function () { + prop_iterator_new: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_property_iterator_new", @@ -328,7 +341,7 @@ const runtime_interface = { [ty.EjsValue] ); }, - prop_iterator_current: function () { + prop_iterator_current: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_property_iterator_current", @@ -336,7 +349,7 @@ const runtime_interface = { [ty.EjsPropIterator] ); }, - prop_iterator_next: function () { + prop_iterator_next: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_property_iterator_next", @@ -344,15 +357,15 @@ const runtime_interface = { [ty.EjsPropIterator, ty.Bool] ); }, - begin_catch: function () { + begin_catch: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_begin_catch", ty.EjsValue, [ ty.Int8Pointer, ]); }, - end_catch: function () { + end_catch: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_end_catch", ty.EjsValue, []); }, - throw_nativeerror_utf8: function () { + throw_nativeerror_utf8: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_throw_nativeerror_utf8", @@ -360,23 +373,23 @@ const runtime_interface = { [ty.Int32, ty.String] ); }, - throw: function () { + throw: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_throw", ty.Void, [ty.EjsValue]); }, - rethrow: function () { + rethrow: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_rethrow", ty.Void, [ty.EjsValue]); }, - ToString: function () { + ToString: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "ToString", ty.EjsValue, [ty.EjsValue]); }, - string_concat: function () { + string_concat: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_string_concat", ty.EjsValue, [ ty.EjsValue, ty.EjsValue, ]); }, - init_string_literal: function () { + init_string_literal: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_string_init_literal", ty.Void, [ ty.String, ty.EjsValue.pointerTo(), @@ -386,12 +399,12 @@ const runtime_interface = { ]); }, - gc_add_root: function () { + gc_add_root: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_gc_add_root", ty.Void, [ ty.EjsValue.pointerTo(), ]); }, - typeof_is_object: function () { + typeof_is_object: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -403,7 +416,7 @@ const runtime_interface = { ) ); }, - typeof_is_function: function () { + typeof_is_function: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -415,7 +428,7 @@ const runtime_interface = { ) ); }, - typeof_is_string: function () { + typeof_is_string: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -427,7 +440,7 @@ const runtime_interface = { ) ); }, - typeof_is_number: function () { + typeof_is_number: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -439,7 +452,7 @@ const runtime_interface = { ) ); }, - typeof_is_undefined: function () { + typeof_is_undefined: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -451,7 +464,7 @@ const runtime_interface = { ) ); }, - typeof_is_null: function () { + typeof_is_null: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -463,7 +476,7 @@ const runtime_interface = { ) ); }, - typeof_is_boolean: function () { + typeof_is_boolean: function (this: RuntimeContext) { return returns_ejsval_bool( only_reads_memory( this.abi.createExternalFunction( @@ -476,7 +489,7 @@ const runtime_interface = { ); }, - create_iter_result: function () { + create_iter_result: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_create_iter_result", @@ -485,7 +498,7 @@ const runtime_interface = { ); }, - iterator_wrapper_new: function () { + iterator_wrapper_new: function (this: RuntimeContext) { return this.abi.createExternalFunction( this.module, "_ejs_iterator_wrapper_new", @@ -494,85 +507,85 @@ const runtime_interface = { ); }, - undefined: function () { + undefined: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_undefined", ty.EjsValue); }, - true: function () { + true: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_true", ty.EjsValue); }, - false: function () { + false: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_false", ty.EjsValue); }, - null: function () { + null: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_null", ty.EjsValue); }, - one: function () { + one: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_one", ty.EjsValue); }, - zero: function () { + zero: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_zero", ty.EjsValue); }, - global: function () { + global: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_global", ty.EjsValue); }, - exception_typeinfo: function () { + exception_typeinfo: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("EJS_EHTYPE_ejsvalue", ty.EjsExceptionTypeInfo); }, - function_specops: function () { + function_specops: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_Function_specops", ty.EjsSpecops); }, - symbol_specops: function () { + symbol_specops: function (this: RuntimeContext) { return this.module.getOrInsertGlobal("_ejs_Symbol_specops", ty.EjsSpecops); }, - "unop-": function () { + "unop-": function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_op_neg", ty.EjsValue, [ ty.EjsValue, ]); }, - "unop+": function () { + "unop+": function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_op_plus", ty.EjsValue, [ ty.EjsValue, ]); }, - "unop!": function () { + "unop!": function (this: RuntimeContext) { return returns_ejsval_bool( this.abi.createExternalFunction(this.module, "_ejs_op_not", ty.EjsValue, [ty.EjsValue]) ); }, - "unop~": function () { + "unop~": function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_op_bitwise_not", ty.EjsValue, [ ty.EjsValue, ]); }, - unoptypeof: function () { + unoptypeof: function (this: RuntimeContext) { return does_not_throw( this.abi.createExternalFunction(this.module, "_ejs_op_typeof", ty.EjsValue, [ ty.EjsValue, ]) ); }, - unopdelete: function () { + unopdelete: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_op_delete", ty.EjsValue, [ ty.EjsValue, ty.EjsValue, ]); }, // this is a unop, but ours only works for memberexpressions - unopvoid: function () { + unopvoid: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_op_void", ty.EjsValue, [ ty.EjsValue, ]); }, - dump_value: function () { + dump_value: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_dump_value", ty.Void, [ ty.EjsValue, ]); }, - log: function () { + log: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_logstr", ty.Void, [ty.String]); }, - record_binop: function () { + record_binop: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_record_binop", ty.Void, [ ty.Int32, ty.String, @@ -580,20 +593,20 @@ const runtime_interface = { ty.EjsValue, ]); }, - record_assignment: function () { + record_assignment: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_record_assignment", ty.Void, [ ty.Int32, ty.EjsValue, ]); }, - record_getprop: function () { + record_getprop: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_record_getprop", ty.Void, [ ty.Int32, ty.EjsValue, ty.EjsValue, ]); }, - record_setprop: function () { + record_setprop: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_record_setprop", ty.Void, [ ty.Int32, ty.EjsValue, @@ -601,21 +614,25 @@ const runtime_interface = { ty.EjsValue, ]); }, +} satisfies Record llvm.EjsFunction | llvm.GlobalVariable>; + +export type RuntimeInterface = RuntimeContext & { + readonly [K in keyof typeof runtime_interface]: ReturnType<(typeof runtime_interface)[K]>; }; -export function createInterface(module, abi) { - let runtime = { - module: module, - abi: abi, - }; +export function createInterface(module: llvm.Module, abi: ABI): RuntimeInterface { + const runtime = { module, abi } as RuntimeInterface; - for (let k of Object.keys(runtime_interface)) + for (const k of Object.keys(runtime_interface) as (keyof typeof runtime_interface)[]) Object.defineProperty(runtime, k, { get: runtime_interface[k] }); return runtime; } -export function createBinopsInterface(module, abi) { - let createBinop = (n) => +export function createBinopsInterface( + module: llvm.Module, + abi: ABI +): Record { + const createBinop = (n: string) => abi.createExternalFunction(module, n, ty.EjsValue, [ty.EjsValue, ty.EjsValue]); return Object.create(null, { "^": { get: () => createBinop("_ejs_op_bitwise_xor") }, @@ -649,8 +666,8 @@ export function createBinopsInterface(module, abi) { }); } -export function createAtomsInterface(module) { - let getGlobal = (n) => module.getOrInsertGlobal(n, ty.EjsValue); +export function createAtomsInterface(module: llvm.Module): Record { + const getGlobal = (n: string) => module.getOrInsertGlobal(n, ty.EjsValue); return Object.create(null, { null: { get: () => getGlobal("_ejs_atom_null") }, undefined: { get: () => getGlobal("_ejs_atom_undefined") }, @@ -816,8 +833,8 @@ export function createAtomsInterface(module) { }); } -export function createGlobalsInterface(module) { - let getGlobal = (n) => module.getOrInsertGlobal(n, ty.EjsValue); +export function createGlobalsInterface(module: llvm.Module): Record { + const getGlobal = (n: string) => module.getOrInsertGlobal(n, ty.EjsValue); return Object.create(null, { Object: { get: () => getGlobal("_ejs_Object") }, Object_prototype: { get: () => getGlobal("_ejs_Object_prototype") }, @@ -882,8 +899,8 @@ export function createGlobalsInterface(module) { }); } -export function createSymbolsInterface(module) { - let getGlobal = (n) => module.getOrInsertGlobal(n, ty.EjsValue); +export function createSymbolsInterface(module: llvm.Module): Record { + const getGlobal = (n: string) => module.getOrInsertGlobal(n, ty.EjsValue); return Object.create(null, { create: { get: () => getGlobal("_ejs_Symbol_create") }, }); From 3f085f71eec5becd3f4730090a56524aa84b5a42 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 18:47:16 -0700 Subject: [PATCH 062/146] =?UTF-8?q?ts:=20eir/scopes=20=E2=80=94=20the=20sc?= =?UTF-8?q?ope=20analysis,=20fully=20typed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Binding/FnInfo/LoopEnv/LexScope become declared classes (FnInfo's lazily-attached argumentsBinding/thisBinding/restBinding/defaults are real fields now); refs is Map, labels are LabelEntry[], and the compound-assign table is keyed against the BinaryOperator union. The walker's node-type dispatch moves from ast-builder constants to the discriminated string literals, which narrows every case body. estree's ExportDefaultDeclaration learns the raw-AST truth that a ClassDeclaration can sit in declaration position. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/eir/{scopes.js => scopes.ts} | 517 ++++++++++++++++--------------- lib/estree.ts | 2 +- 2 files changed, 273 insertions(+), 246 deletions(-) rename lib/eir/{scopes.js => scopes.ts} (71%) diff --git a/lib/eir/scopes.js b/lib/eir/scopes.ts similarity index 71% rename from lib/eir/scopes.js rename to lib/eir/scopes.ts index b3d7d9d6..158a3d97 100644 --- a/lib/eir/scopes.js +++ b/lib/eir/scopes.ts @@ -1,9 +1,8 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// Scope analysis for EIR lowering. A fresh, self-contained replacement for -// the parts of new-cc's Scope/Binding machinery that lowering needs: +// Scope analysis for EIR lowering: // // - every binding (param, var/let/const, function decl, catch param) gets // a unique id, so shadowing never aliases SSA variables; @@ -15,16 +14,17 @@ // carry a parent-env pointer in slot 0. // // The walker deliberately covers the same whitelisted AST subset as -// lower.js and throws LowerNotSupported on anything else, early — a +// lower.ts and throws LowerNotSupported on anything else, early — a // construct that doesn't lower is a compile error, and it must surface // before lowering starts mutating the module. -import * as b from "../ast-builder"; -import { LowerNotSupported, isLowerNotSupported } from "./errors"; +import type * as e from "../estree"; +import { LowerNotSupported } from "./errors"; import { eir_intrinsics } from "./intrinsics"; +import type { BinaryOperator } from "../estree"; // compound assignment operator -> the binary operator it desugars to -// (kept in sync with lower.js's binops table) +// (kept in sync with lower.ts's binops table) export const compound_assign_ops = { "+=": "+", "-=": "-", @@ -37,41 +37,59 @@ export const compound_assign_ops = { "<<=": "<<", ">>=": ">>", ">>>=": ">>>", -}; +} satisfies Record as Record; + +export type BindingKind = "param" | "local" | "fn" | "catch" | "self" | "this"; let binding_id_gen = 0; export class Binding { - constructor(name, kind, fnInfo) { + name: string; + uid: string; + kind: BindingKind; + fnInfo: FnInfo | null; // declaring FnInfo + captured = false; + slot = -1; // env slot, if captured + loopEnv: LoopEnv | null = null; // LoopEnv candidate, for let/const loop bindings + + constructor(name: string, kind: BindingKind, fnInfo: FnInfo | null) { this.name = name; this.uid = `${name}#${binding_id_gen++}`; - this.kind = kind; // "param" | "local" | "fn" | "catch" - this.fnInfo = fnInfo; // declaring FnInfo - this.captured = false; - this.slot = -1; // env slot, if captured - this.loopEnv = null; // LoopEnv candidate, for let/const loop bindings + this.kind = kind; + this.fnInfo = fnInfo; } } export class FnInfo { - constructor(node, name, parent) { + node: e.Function; + name: string; + parent: FnInfo | null; + children: FnInfo[] = []; + params: Binding[] = []; + bindings: Binding[] = []; // every Binding declared here + needsParentEnv = false; // some descendant reaches past this fn + envSize = 0; // slots (incl. parent slot), 0 = no env + parentSlot = -1; // slot holding the parent env, or -1 + creationLoopEnv: LoopEnv | null = null; // innermost LoopEnv at the definition site + // set lazily by the walker + restBinding: Binding | null = null; + defaults: (e.Expression | null)[] = []; + argumentsBinding: Binding | null = null; + usesArguments = false; + thisBinding: Binding | null = null; + isToplevel = false; + + constructor(node: e.Function, name: string, parent: FnInfo | null) { this.node = node; this.name = name; - this.parent = parent; // FnInfo or null - this.children = []; - this.params = []; // Binding[] - this.bindings = []; // every Binding declared here - this.needsParentEnv = false; // some descendant reaches past this fn - this.envSize = 0; // slots (incl. parent slot), 0 = no env - this.parentSlot = -1; // slot holding the parent env, or -1 - this.creationLoopEnv = null; // innermost LoopEnv at the definition site + this.parent = parent; if (parent) parent.children.push(this); } } // a per-iteration environment for a loop whose let/const bindings are // captured by closures (`for (let i ...) { use(() => i); }`): each -// iteration allocates a fresh env so every closure sees that iteration's +// iteration allocates a fresh env so every closure sees that iteration\'s // binding. slot 0 always holds the enclosing environment (the value of // curEnv at loop entry). candidates are created for every let/const // loop declaration during the walk and materialize after it, once @@ -79,101 +97,115 @@ export class FnInfo { let loopenv_id_gen = 0; export class LoopEnv { - constructor(fnInfo, node, parentCandidate) { + id: number; + isLoopEnv = true; + fnInfo: FnInfo | null; // the function containing the loop + node: e.Node; // the loop AST node + parentCandidate: LoopEnv | null; // enclosing LoopEnv in the same fn, or null + allBindings: Binding[] = []; // every let/const binding the loop declares + bindings: Binding[] = []; // the captured subset (set at materialization) + materialized = false; + envSize = 0; + parentSlot = -1; // always 0 once materialized + + constructor(fnInfo: FnInfo | null, node: e.Node, parentCandidate: LoopEnv | null) { this.id = loopenv_id_gen++; - this.isLoopEnv = true; - this.fnInfo = fnInfo; // the function containing the loop - this.node = node; // the loop AST node - this.parentCandidate = parentCandidate; // enclosing LoopEnv in the same fn, or null - this.allBindings = []; // every let/const binding the loop declares - this.bindings = []; // the captured subset (set at materialization) - this.materialized = false; - this.envSize = 0; - this.parentSlot = -1; // always 0 once materialized + this.fnInfo = fnInfo; + this.node = node; + this.parentCandidate = parentCandidate; } } class LexScope { - constructor(parent, fnInfo) { + parent: LexScope | null; + fnInfo: FnInfo | null; + names = new Map(); + isFnTop = false; + + constructor(parent: LexScope | null, fnInfo: FnInfo | null) { this.parent = parent; this.fnInfo = fnInfo; - this.names = new Map(); // name -> Binding } - declare(name, kind) { + declare(name: string, kind: BindingKind): Binding { // redeclaration in the same lexical scope reuses the binding (var x; // var x; — and function-level var hoisting lands them in one scope) - if (this.names.has(name)) return this.names.get(name); - let binding = new Binding(name, kind, this.fnInfo); + const existing = this.names.get(name); + if (existing) return existing; + const binding = new Binding(name, kind, this.fnInfo); this.names.set(name, binding); - this.fnInfo.bindings.push(binding); + this.fnInfo!.bindings.push(binding); return binding; } - lookup(name) { - let s = this; + lookup(name: string): Binding | null { + let s: LexScope | null = this; while (s) { - if (s.names.has(name)) return s.names.get(name); + const found = s.names.get(name); + if (found) return found; s = s.parent; } return null; } } +export interface LabelEntry { + name: string; + isLoop: boolean; +} + export class ScopeAnalysis { - constructor() { - this.refs = new Map(); // Identifier node -> Binding | null (global) - this.fnInfos = new Map(); // Function node -> FnInfo - this.globalNames = new Set(); // free names that resolved to nothing - this.globalValueNames = new Set(); // free names used other than as a direct callee - this.globalAssignedNames = new Set(); // free names that are assigned to - this.anon_gen = 0; - this.curScope = null; - this.curFn = null; - // per-iteration loop env candidates: every let/const loop - // declaration gets one; those with captured bindings materialize - // after the walk (see analyzeFunction) and lowering builds a - // fresh env per iteration. - this.loopEnvs = []; - this.loopEnvStack = []; // active candidates (innermost last) - this.loopEnvByNode = new Map(); // loop AST node -> head LoopEnv - this.bodyEnvByNode = new Map(); // loop AST node -> body LoopEnv - // set around a for-init declaration walk so the declared bindings - // attach to the loop's env candidate - this.pendingLoopEnv = null; - // labels are per-function (a labeled break can't cross a function - // boundary); enterFunction/leaveFunction save and restore - this.labelStack = []; - this.savedLabelStacks = []; - // toplevel-as-EIR mode (analyzeToplevel): module-scope names backed - // by module slots (or const-literal folds). declarations of these - // at the root function's top level create NO local binding — every - // reference resolves as free and the integration's refs machinery - // routes it through the slot. - this.moduleSlotNames = null; - this.rootInfo = null; - // every EIR function name handed out by enterFunction (scope - // qualification alone isn't unique) - this.usedFnNames = new Set(); - } + refs = new Map(); // Identifier node -> Binding | null (global) + fnInfos = new Map(); + globalNames = new Set(); // free names that resolved to nothing + globalValueNames = new Set(); // free names used other than as a direct callee + globalAssignedNames = new Set(); // free names that are assigned to + anon_gen = 0; + curScope: LexScope | null = null; + curFn: FnInfo | null = null; + // per-iteration loop env candidates: every let/const loop + // declaration gets one; those with captured bindings materialize + // after the walk (see analyzeFunction) and lowering builds a + // fresh env per iteration. + loopEnvs: LoopEnv[] = []; + loopEnvStack: LoopEnv[] = []; // active candidates (innermost last) + loopEnvByNode = new Map(); // loop AST node -> head LoopEnv + bodyEnvByNode = new Map(); // loop AST node -> body LoopEnv + // set around a for-init declaration walk so the declared bindings + // attach to the loop's env candidate + pendingLoopEnv: LoopEnv | null = null; + // labels are per-function (a labeled break can't cross a function + // boundary); enterFunction/leaveFunction save and restore + labelStack: LabelEntry[] = []; + savedLabelStacks: LabelEntry[][] = []; + // toplevel-as-EIR mode (analyzeToplevel): module-scope names backed + // by module slots (or const-literal folds). declarations of these + // at the root function's top level create NO local binding — every + // reference resolves as free and the integration's refs machinery + // routes it through the slot. + moduleSlotNames: Set | null = null; + rootInfo: FnInfo | null = null; + // every EIR function name handed out by enterFunction (scope + // qualification alone isn't unique) + usedFnNames = new Set(); // the loop's materialized head env, or null (for lowering) - loopEnvOf(node) { + loopEnvOf(node: e.Node): LoopEnv | null { let le = this.loopEnvByNode.get(node); return le && le.materialized ? le : null; } // the loop's materialized body env, or null (for lowering) - loopBodyEnvOf(node) { + loopBodyEnvOf(node: e.Node): LoopEnv | null { let le = this.bodyEnvByNode.get(node); return le && le.materialized ? le : null; } - resolve(node) { + resolve(node: e.Node): Binding | null | undefined { return this.refs.get(node); } - infoFor(fnNode) { + infoFor(fnNode: e.Function): FnInfo | undefined { return this.fnInfos.get(fnNode); } @@ -183,7 +215,7 @@ export class ScopeAnalysis { // top-level declarations belong to the function scope itself (isFnTop), // otherwise every body-level function declaration would look like a // block-level one. - walkFnBody(body) { + walkFnBody(body: e.BlockStatement): void { // hoisting, pass 1: function-scope declarations are visible from // the top of the function regardless of statement order (function // declarations hoist, and echojs's no-TDZ let/const read as @@ -191,32 +223,28 @@ export class ScopeAnalysis { // function placed ABOVE a let/const it captures — which the // pre-EIR HoistFuncDecls pass produces routinely — resolved the // name as a global. - for (let s of body.body) { - let stmt = s; - if ( - stmt.type === b.ExportNamedDeclaration && - stmt.declaration && - !Array.isArray(stmt.declaration) - ) + for (const s of body.body) { + let stmt: e.Statement = s; + if (stmt.type === "ExportNamedDeclaration" && stmt.declaration) stmt = stmt.declaration; - if (stmt.type === b.VariableDeclaration) { + if (stmt.type === "VariableDeclaration") { for (let d of stmt.declarations) { // patterns are pre-desugared (DesugarDestructuring runs // before HoistFuncDecls); if one reaches us anyway, // fall back rather than silently skip its targets — // they'd misresolve as globals from any hoisted // function above the declaration - if (d.id.type !== b.Identifier) + if (d.id.type !== "Identifier") throw LowerNotSupported( `fn-top declaration pattern ${d.id.type}`, stmt.loc ); - if (this.slotBackedDecl(d.id.name, this.curScope)) continue; - this.curScope.declare(d.id.name, "local"); + if (this.slotBackedDecl(d.id.name, this.curScope!)) continue; + this.curScope!.declare(d.id.name, "local"); } - } else if (stmt.type === b.FunctionDeclaration && stmt.id) { - if (this.slotBackedDecl(stmt.id.name, this.curScope)) continue; - this.curScope.declare(stmt.id.name, "fn"); + } else if (stmt.type === "FunctionDeclaration" && stmt.id) { + if (this.slotBackedDecl(stmt.id.name, this.curScope!)) continue; + this.curScope!.declare(stmt.id.name, "fn"); } else { // `var`s nested in other statements (`if (c) var x = ...`) // hoist to the function scope too @@ -228,39 +256,40 @@ export class ScopeAnalysis { // pre-declare var-kind declarations at any statement depth (stopping // at nested functions, whose vars are their own) - prescanNestedVars(n) { + prescanNestedVars(n: unknown): void { if (!n || typeof n !== "object") return; if (Array.isArray(n)) { - for (let el of n) this.prescanNestedVars(el); + for (const el of n) this.prescanNestedVars(el); return; } - switch (n.type) { - case b.FunctionDeclaration: - case b.FunctionExpression: - case b.ArrowFunctionExpression: + const node = n as e.Node; + switch (node.type) { + case "FunctionDeclaration": + case "FunctionExpression": + case "ArrowFunctionExpression": return; // function boundary - case b.VariableDeclaration: - if (n.kind !== "var") return; // let/const are block-scoped - for (let d of n.declarations) { - if (d.id.type !== b.Identifier) + case "VariableDeclaration": + if (node.kind !== "var") return; // let/const are block-scoped + for (const d of node.declarations) { + if (d.id.type !== "Identifier") throw LowerNotSupported( `nested var declaration pattern ${d.id.type}`, - n.loc + node.loc ); - if (this.slotBackedDecl(d.id.name, this.curScope)) continue; - this.curScope.declare(d.id.name, "local"); + if (this.slotBackedDecl(d.id.name, this.curScope!)) continue; + this.curScope!.declare(d.id.name, "local"); } return; default: - for (let k of Object.keys(n)) { + for (const k of Object.keys(node)) { if (k === "loc") continue; - this.prescanNestedVars(n[k]); + this.prescanNestedVars((node as unknown as Record)[k]); } return; } } - analyzeFunction(fnNode, name) { + analyzeFunction(fnNode: e.Function, name?: string): FnInfo { // bind the function's own name outside its scope (like a named // function expression) so recursion resolves to a "self" binding // instead of looking like a global; lowering turns calls through @@ -278,10 +307,10 @@ export class ScopeAnalysis { } let info = this.enterFunction(fnNode, name); if (selfBinding) selfBinding.fnInfo = info; - if (fnNode.body.type === b.BlockStatement) this.walkFnBody(fnNode.body); + if (fnNode.body.type === "BlockStatement") this.walkFnBody(fnNode.body); else this.walkExpr(fnNode.body); // expression-bodied arrow this.leaveFunction(); - if (selfBinding) this.curScope = this.curScope.parent; + if (selfBinding) this.curScope = this.curScope!.parent; this.finishAnalysis(info); return info; } @@ -290,7 +319,7 @@ export class ScopeAnalysis { // bindings named in moduleSlotNames get no local binding (their // declarations lower as slot stores, their references as slot loads); // everything else is an ordinary toplevel local. - analyzeToplevel(fnNode, name, moduleSlotNames) { + analyzeToplevel(fnNode: e.FunctionDeclaration, name: string, moduleSlotNames: Set): FnInfo { this.moduleSlotNames = moduleSlotNames; let info = this.enterFunction(fnNode, name); info.isToplevel = true; @@ -301,7 +330,7 @@ export class ScopeAnalysis { return info; } - finishAnalysis(info) { + finishAnalysis(info: FnInfo): void { // materialize the loop envs whose bindings are captured; their // bindings get loop-env slots (from 1; slot 0 is the parent env) // and are excluded from function-env slot assignment below. @@ -319,7 +348,7 @@ export class ScopeAnalysis { // is a declaration of `name`, landing in `scope`, backed by a module // slot (or const-literal fold) instead of a local binding? - slotBackedDecl(name, scope) { + slotBackedDecl(name: string, scope: LexScope): boolean { return ( this.moduleSlotNames !== null && this.curFn === this.rootInfo && @@ -328,7 +357,7 @@ export class ScopeAnalysis { ); } - enterFunction(fnNode, name) { + enterFunction(fnNode: e.Function, name?: string): FnInfo { let fname = name || (fnNode.id && fnNode.id.name) || "anon"; // scope-qualified names aren't unique on their own (an object // method `replace` and a toplevel function `replace` both qualify @@ -360,10 +389,10 @@ export class ScopeAnalysis { // the rest parameter (a trailing RestElement, or fnNode.rest in // older ASTs) is an ordinary local initialized from the trailing // arguments in the prologue (see lower.js / rest_args) - let restId = fnNode.rest || null; + let restId: e.Pattern | null = fnNode.rest ?? null; let plainParams = fnNode.params; let last = plainParams[plainParams.length - 1]; - if (last && last.type === b.RestElement) { + if (last && last.type === "RestElement") { restId = last.argument; // (positive end index: the self-hosted runtime's slice-dense // fast path crashes on negative indices — see runtime bug note @@ -371,16 +400,16 @@ export class ScopeAnalysis { plainParams = plainParams.slice(0, plainParams.length - 1); } for (let p of plainParams) { - if (p.type !== b.Identifier) + if (p.type !== "Identifier") throw LowerNotSupported(`param pattern ${p.type}`, fnNode.loc); - let binding = this.curScope.declare(p.name, "param"); + let binding = this.curScope!.declare(p.name, "param"); info.params.push(binding); } info.restBinding = null; if (restId) { - if (restId.type !== b.Identifier) + if (restId.type !== "Identifier") throw LowerNotSupported(`rest pattern ${restId.type}`, fnNode.loc); - info.restBinding = this.curScope.declare(restId.name, "local"); + info.restBinding = this.curScope!.declare(restId.name, "local"); this.refs.set(restId, info.restBinding); } // default-parameter expressions are evaluated in the function scope @@ -393,13 +422,13 @@ export class ScopeAnalysis { return info; } - leaveFunction() { - this.curScope = this.curScope.parent; - this.curFn = this.curFn.parent; - this.labelStack = this.savedLabelStacks.pop(); + leaveFunction(): void { + this.curScope = this.curScope!.parent; + this.curFn = this.curFn!.parent; + this.labelStack = this.savedLabelStacks.pop()!; } - pushLoopEnv(node) { + pushLoopEnv(node: e.Node): LoopEnv { let top = this.loopEnvStack[this.loopEnvStack.length - 1]; let parentCandidate = top && top.fnInfo === this.curFn ? top : null; let le = new LoopEnv(this.curFn, node, parentCandidate); @@ -414,7 +443,7 @@ export class ScopeAnalysis { // environment per iteration — their declarations re-execute each pass, // so no value copies forward (unlike for-head vars). pushed around the // body walk of every loop form. - pushLoopBodyEnv(node) { + pushLoopBodyEnv(node: e.Node): LoopEnv { let top = this.loopEnvStack[this.loopEnvStack.length - 1]; let parentCandidate = top && top.fnInfo === this.curFn ? top : null; let le = new LoopEnv(this.curFn, node, parentCandidate); @@ -426,14 +455,14 @@ export class ScopeAnalysis { // a let/const declaration inside a loop body attaches to that loop's // body env (top of stack, same function) - attachBodyLet(binding) { + attachBodyLet(binding: Binding): void { let top = this.loopEnvStack[this.loopEnvStack.length - 1]; if (!top || top.fnInfo !== this.curFn) return; binding.loopEnv = top; top.allBindings.push(binding); } - reference(idNode, isCallee) { + reference(idNode: e.Identifier, isCallee = false): Binding | null { if (idNode.name === "undefined") { this.refs.set(idNode, null); return null; @@ -442,7 +471,7 @@ export class ScopeAnalysis { // bind to the nearest non-arrow function's (synthetic) // arguments object, created in its prologue let f = this.curFn; - while (f && f.node.type === b.ArrowFunctionExpression) f = f.parent; + while (f && f.node.type === "ArrowFunctionExpression") f = f.parent; if (!f) throw LowerNotSupported("`arguments` outside a function", idNode.loc); if (!f.argumentsBinding) { f.argumentsBinding = new Binding("arguments", "local", f); @@ -461,7 +490,7 @@ export class ScopeAnalysis { } return abinding; } - let binding = this.curScope.lookup(idNode.name); + let binding = this.curScope!.lookup(idNode.name); this.refs.set(idNode, binding); // null = global if (!binding) { // %-named identifiers are compiler-synthesized: ones that @@ -506,26 +535,26 @@ export class ScopeAnalysis { // --- statements --------------------------------------------------------------- - walkStmt(n) { + walkStmt(n: e.Statement): void { switch (n.type) { - case b.BlockStatement: { + case "BlockStatement": { this.curScope = new LexScope(this.curScope, this.curFn); - for (let s of n.body) this.walkStmt(s); - this.curScope = this.curScope.parent; + for (const s of n.body) this.walkStmt(s); + this.curScope = this.curScope!.parent; return; } - case b.VariableDeclaration: { + case "VariableDeclaration": { // consume the for-init loop env candidate before descending // into initializer expressions (a nested function's own // declarations must not attach to it) let ple = this.pendingLoopEnv; this.pendingLoopEnv = null; for (let d of n.declarations) { - if (d.id.type === b.ObjectPattern) { + if (d.id.type === "ObjectPattern") { this.declareObjectPattern(n, d, ple); continue; } - if (d.id.type !== b.Identifier) + if (d.id.type !== "Identifier") throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); // declare BEFORE walking the init: a closure created in // the initializer must see the binding (`let walk = @@ -536,9 +565,9 @@ export class ScopeAnalysis { // legacy alloca behavior. // var declarations hoist to the function scope; only // let/const are block-scoped. - let scope = this.curScope; + let scope = this.curScope!; if (n.kind === "var") { - while (!scope.isFnTop) scope = scope.parent; + while (!scope.isFnTop) scope = scope.parent!; } if (this.slotBackedDecl(d.id.name, scope)) { // toplevel module binding: no local; the declarator @@ -560,16 +589,16 @@ export class ScopeAnalysis { } return; } - case b.FunctionDeclaration: { + case "FunctionDeclaration": { if (!n.id) throw LowerNotSupported("unnamed function declaration", n.loc); - if (!this.curScope.isFnTop) + if (!this.curScope!.isFnTop) throw LowerNotSupported("block-level function declaration", n.loc); - if (this.slotBackedDecl(n.id.name, this.curScope)) { + if (this.slotBackedDecl(n.id.name, this.curScope!)) { // toplevel module function: no local binding — the // closure is stored to its slot at this statement's // position, and every reference (self-references // included) reads the slot - let fname = `${this.curFn.name}.${n.id.name}`; + let fname = `${this.curFn!.name}.${n.id.name}`; this.enterFunction(n, fname); this.walkFnBody(n.body); this.leaveFunction(); @@ -579,7 +608,7 @@ export class ScopeAnalysis { // declare() hands back the same binding. genuine // same-scope duplicates can't survive HoistFuncDecls // (its per-name map keeps only the last declaration). - let binding = this.curScope.declare(n.id.name, "fn"); + let binding = this.curScope!.declare(n.id.name, "fn"); this.refs.set(n.id, binding); let name = this.curFn ? `${this.curFn.name}.${n.id.name}` : n.id.name; this.enterFunction(n, name); @@ -587,7 +616,7 @@ export class ScopeAnalysis { this.leaveFunction(); return; } - case b.ImportDeclaration: { + case "ImportDeclaration": { // toplevel mode only: scaffolding resolves the imported // module; binding reads route through refs. a specifier // whose local name has no slot backing (a native module's @@ -604,7 +633,7 @@ export class ScopeAnalysis { } return; } - case b.ExportNamedDeclaration: { + case "ExportNamedDeclaration": { if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) throw LowerNotSupported("export declaration", n.loc); // re-export (`export { a as b } from "m"`): the specifier @@ -621,49 +650,49 @@ export class ScopeAnalysis { // `export {}` — a valid, empty statement return; } - case b.ExportDefaultDeclaration: { + case "ExportDefaultDeclaration": { if (this.moduleSlotNames === null || this.curFn !== this.rootInfo) throw LowerNotSupported("export default", n.loc); if ( - n.declaration.type === b.FunctionDeclaration || - n.declaration.type === b.ClassDeclaration + n.declaration.type === "FunctionDeclaration" || + n.declaration.type === "ClassDeclaration" ) throw LowerNotSupported("export default declaration", n.loc); - this.walkExpr(n.declaration); + this.walkExpr(n.declaration as e.Expression); return; } - case b.ExportAllDeclaration: + case "ExportAllDeclaration": throw LowerNotSupported("export *", n.loc); - case b.ExpressionStatement: + case "ExpressionStatement": this.walkExpr(n.expression); return; - case b.IfStatement: + case "IfStatement": this.walkExpr(n.test); this.walkStmt(n.consequent); if (n.alternate) this.walkStmt(n.alternate); return; - case b.WhileStatement: { + case "WhileStatement": { this.walkExpr(n.test); this.pushLoopBodyEnv(n); this.walkStmt(n.body); this.loopEnvStack.pop(); return; } - case b.DoWhileStatement: { + case "DoWhileStatement": { this.pushLoopBodyEnv(n); this.walkStmt(n.body); this.loopEnvStack.pop(); this.walkExpr(n.test); return; } - case b.ForStatement: { + case "ForStatement": { this.curScope = new LexScope(this.curScope, this.curFn); let le = null; - if (n.init && n.init.type === b.VariableDeclaration && n.init.kind !== "var") { + if (n.init && n.init.type === "VariableDeclaration" && n.init.kind !== "var") { le = this.pushLoopEnv(n); } if (n.init) { - if (n.init.type === b.VariableDeclaration) { + if (n.init.type === "VariableDeclaration") { // the declared bindings attach to the loop env // candidate (cleared by the declaration walk before // it descends into initializer expressions) @@ -678,33 +707,29 @@ export class ScopeAnalysis { this.walkStmt(n.body); this.loopEnvStack.pop(); if (le) this.loopEnvStack.pop(); - this.curScope = this.curScope.parent; + this.curScope = this.curScope!.parent; return; } - case b.ForInStatement: - case b.ForOfStatement: { + case "ForInStatement": + case "ForOfStatement": { this.curScope = new LexScope(this.curScope, this.curFn); let le = null; - if (n.left.type === b.VariableDeclaration) { - if ( - n.left.declarations.length !== 1 || - n.left.declarations[0].id.type !== b.Identifier || - n.left.declarations[0].init - ) + if (n.left.type === "VariableDeclaration") { + const d = n.left.declarations[0]; + if (n.left.declarations.length !== 1 || !d || d.id.type !== "Identifier" || d.init) throw LowerNotSupported("for-of/for-in binding form", n.loc); - let d = n.left.declarations[0]; - let scope = this.curScope; + let scope = this.curScope!; if (n.left.kind === "var") { - while (!scope.isFnTop) scope = scope.parent; + while (!scope.isFnTop) scope = scope.parent!; } - let binding = scope.declare(d.id.name, "local"); + const binding = scope.declare(d.id.name, "local"); this.refs.set(d.id, binding); if (n.left.kind !== "var") { le = this.pushLoopEnv(n); binding.loopEnv = le; le.allBindings.push(binding); } - } else if (n.left.type === b.Identifier) { + } else if (n.left.type === "Identifier") { let binding = this.reference(n.left); if (!binding) this.globalAssignedNames.add(n.left.name); } else { @@ -715,10 +740,10 @@ export class ScopeAnalysis { this.walkStmt(n.body); this.loopEnvStack.pop(); if (le) this.loopEnvStack.pop(); - this.curScope = this.curScope.parent; + this.curScope = this.curScope!.parent; return; } - case b.SwitchStatement: { + case "SwitchStatement": { this.walkExpr(n.discriminant); // all case bodies share one lexical scope this.curScope = new LexScope(this.curScope, this.curFn); @@ -733,16 +758,16 @@ export class ScopeAnalysis { } for (let s of c.consequent) this.walkStmt(s); } - this.curScope = this.curScope.parent; + this.curScope = this.curScope!.parent; return; } - case b.ReturnStatement: + case "ReturnStatement": if (n.argument) this.walkExpr(n.argument); return; - case b.ThrowStatement: + case "ThrowStatement": this.walkExpr(n.argument); return; - case b.TryStatement: { + case "TryStatement": { let nhandlers = n.handlers ? n.handlers.length : 0; if (nhandlers > 1) throw LowerNotSupported("try with multiple catch clauses", n.loc); @@ -750,52 +775,54 @@ export class ScopeAnalysis { throw LowerNotSupported("try without catch or finally", n.loc); this.walkStmt(n.block); if (nhandlers === 1) { - let handler = n.handlers[0]; + const handler = n.handlers[0]!; this.curScope = new LexScope(this.curScope, this.curFn); if (handler.param) { - if (handler.param.type !== b.Identifier) + if (handler.param.type !== "Identifier") throw LowerNotSupported("catch parameter pattern", n.loc); - let binding = this.curScope.declare(handler.param.name, "catch"); + let binding = this.curScope!.declare(handler.param.name, "catch"); this.refs.set(handler.param, binding); } this.walkStmt(handler.body); - this.curScope = this.curScope.parent; + this.curScope = this.curScope!.parent; } if (n.finalizer) this.walkStmt(n.finalizer); return; } - case b.LabeledStatement: { + case "LabeledStatement": { if (this.labelStack.some((l) => l.name === n.label.name)) throw LowerNotSupported(`duplicate label '${n.label.name}'`, n.loc); // a label chain ending in a loop is continue-able let body = n.body; - while (body.type === b.LabeledStatement) body = body.body; + while (body.type === "LabeledStatement") body = body.body; let isLoop = - body.type === b.WhileStatement || - body.type === b.DoWhileStatement || - body.type === b.ForStatement || - body.type === b.ForInStatement || - body.type === b.ForOfStatement; + body.type === "WhileStatement" || + body.type === "DoWhileStatement" || + body.type === "ForStatement" || + body.type === "ForInStatement" || + body.type === "ForOfStatement"; this.labelStack.push({ name: n.label.name, isLoop: isLoop }); this.walkStmt(n.body); this.labelStack.pop(); return; } - case b.BreakStatement: + case "BreakStatement": if (n.label) { - let l = this.labelStack.find((x) => x.name === n.label.name); - if (!l) throw LowerNotSupported(`break to unknown label '${n.label.name}'`, n.loc); + const labelName = n.label.name; + const l = this.labelStack.find((x) => x.name === labelName); + if (!l) throw LowerNotSupported(`break to unknown label '${labelName}'`, n.loc); } return; - case b.ContinueStatement: + case "ContinueStatement": if (n.label) { - let l = this.labelStack.find((x) => x.name === n.label.name); + const labelName = n.label.name; + const l = this.labelStack.find((x) => x.name === labelName); if (!l || !l.isLoop) - throw LowerNotSupported(`continue to non-loop label '${n.label.name}'`, n.loc); + throw LowerNotSupported(`continue to non-loop label '${labelName}'`, n.loc); } return; - case b.EmptyStatement: - case b.DebuggerStatement: // a no-op in compiled code + case "EmptyStatement": + case "DebuggerStatement": // a no-op in compiled code return; default: throw LowerNotSupported(`statement type ${n.type}`, n.loc); @@ -804,23 +831,23 @@ export class ScopeAnalysis { // `let { a, b: c, d = dflt } = init` — shallow object patterns only. // loopEnv is the enclosing for-init loop env candidate, if any. - declareObjectPattern(declStmt, d, loopEnv) { - let scope = this.curScope; + declareObjectPattern(declStmt: e.VariableDeclaration, d: e.VariableDeclarator, loopEnv: LoopEnv | null): void { + let scope = this.curScope!; if (declStmt.kind === "var") { - while (!scope.isFnTop) scope = scope.parent; + while (!scope.isFnTop) scope = scope.parent!; } - for (let prop of d.id.properties) { + for (const prop of (d.id as e.ObjectPattern).properties) { if (prop.computed) throw LowerNotSupported("computed key in declaration pattern", declStmt.loc); - if (prop.key.type !== b.Identifier && prop.key.type !== b.Literal) + if (prop.key.type !== "Identifier" && prop.key.type !== "Literal") throw LowerNotSupported("declaration pattern key", declStmt.loc); - let target = prop.value; - let dflt = null; - if (target.type === b.AssignmentPattern) { + let target = prop.value as e.Pattern; + let dflt: e.Expression | null = null; + if (target.type === "AssignmentPattern") { dflt = target.right; target = target.left; } - if (target.type !== b.Identifier) + if (target.type !== "Identifier") throw LowerNotSupported( `nested declaration pattern ${target.type}`, declStmt.loc @@ -838,9 +865,9 @@ export class ScopeAnalysis { // --- expressions ------------------------------------------------------------ - walkExpr(n) { + walkExpr(n: e.Expression | e.SpreadElement): void { switch (n.type) { - case b.Literal: + case "Literal": // object-valued literals are regexes (lowerable) or // engine-specific oddities (fall back early) if (n.value !== null && typeof n.value === "object") { @@ -848,100 +875,100 @@ export class ScopeAnalysis { throw LowerNotSupported(`literal ${typeof n.value}`, n.loc); } return; - case b.Identifier: + case "Identifier": this.reference(n); return; - case b.BinaryExpression: - case b.LogicalExpression: + case "BinaryExpression": + case "LogicalExpression": this.walkExpr(n.left); this.walkExpr(n.right); return; - case b.UnaryExpression: - if (n.operator === "delete" && n.argument.type !== b.MemberExpression) + case "UnaryExpression": + if (n.operator === "delete" && n.argument.type !== "MemberExpression") throw LowerNotSupported("delete of a non-member expression", n.loc); this.walkExpr(n.argument); return; - case b.AssignmentExpression: + case "AssignmentExpression": // compound assignments must desugar to a binop lowering // knows; reject others here so we fall back early (a late // lowering failure abandons the whole file's EIR set) if (n.operator !== "=" && !compound_assign_ops[n.operator]) throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); - if (n.left.type === b.Identifier) { + if (n.left.type === "Identifier") { let binding = this.reference(n.left); if (!binding) this.globalAssignedNames.add(n.left.name); - } else this.walkExpr(n.left); + } else this.walkExpr(n.left as e.Expression); this.walkExpr(n.right); return; - case b.UpdateExpression: - if (n.argument.type === b.Identifier) { + case "UpdateExpression": + if (n.argument.type === "Identifier") { let binding = this.reference(n.argument); if (!binding) this.globalAssignedNames.add(n.argument.name); - } else if (n.argument.type === b.MemberExpression) { + } else if (n.argument.type === "MemberExpression") { this.walkExpr(n.argument); } else { throw LowerNotSupported(`update of ${n.argument.type}`, n.loc); } return; - case b.TemplateLiteral: + case "TemplateLiteral": for (let e of n.expressions) this.walkExpr(e); return; - case b.TaggedTemplateExpression: - if (n.tag.type === b.Identifier) this.reference(n.tag, true); + case "TaggedTemplateExpression": + if (n.tag.type === "Identifier") this.reference(n.tag, true); else this.walkExpr(n.tag); for (let e of n.quasi.expressions) this.walkExpr(e); return; - case b.CallExpression: + case "CallExpression": // %-intrinsic calls (from the pre-EIR desugar passes): // the callee is a lowering directive, not a reference. // only whitelisted intrinsics lower; reject others early. - if (n.callee.type === b.Identifier && n.callee.name[0] === "%") { + if (n.callee.type === "Identifier" && n.callee.name[0] === "%") { if (!eir_intrinsics[n.callee.name]) throw LowerNotSupported(`intrinsic ${n.callee.name}`, n.loc); for (let a of n.arguments) this.walkExpr(a); return; } - if (n.callee.type === b.Identifier) this.reference(n.callee, true); + if (n.callee.type === "Identifier") this.reference(n.callee, true); else this.walkExpr(n.callee); for (let a of n.arguments) this.walkExpr(a); return; - case b.NewExpression: + case "NewExpression": this.walkExpr(n.callee); for (let a of n.arguments) this.walkExpr(a); return; - case b.MemberExpression: + case "MemberExpression": this.walkExpr(n.object); if (n.computed) this.walkExpr(n.property); return; - case b.ConditionalExpression: + case "ConditionalExpression": this.walkExpr(n.test); this.walkExpr(n.consequent); this.walkExpr(n.alternate); return; - case b.FunctionExpression: { + case "FunctionExpression": { let name = (n.id && n.id.name) || `anon${this.anon_gen++}`; this.enterFunction(n, this.curFn ? `${this.curFn.name}.${name}` : name); this.walkFnBody(n.body); this.leaveFunction(); return; } - case b.ArrowFunctionExpression: { + case "ArrowFunctionExpression": { // arrows lower as ordinary closures; lexical `this` reads // resolve to the owner function's captured this binding // (see the ThisExpression case below) let name = `arrow${this.anon_gen++}`; this.enterFunction(n, this.curFn ? `${this.curFn.name}.${name}` : name); - if (n.body.type === b.BlockStatement) this.walkFnBody(n.body); + if (n.body.type === "BlockStatement") this.walkFnBody(n.body); else this.walkExpr(n.body); this.leaveFunction(); return; } - case b.ThisExpression: { + case "ThisExpression": { // an arrow's `this` is lexical: capture the nearest // non-arrow ancestor's this in its environment (the same // shape as the `arguments` machinery above) let f = this.curFn; - while (f && f.node.type === b.ArrowFunctionExpression) f = f.parent; + while (f && f.node.type === "ArrowFunctionExpression") f = f.parent; // a candidate whose root IS an arrow has no owner here; // its lexical `this` is the module toplevel's — fall back if (!f) throw LowerNotSupported("lexical `this` in a toplevel arrow", n.loc); @@ -960,16 +987,16 @@ export class ScopeAnalysis { } return; } - case b.SequenceExpression: + case "SequenceExpression": for (let e of n.expressions) this.walkExpr(e); return; - case b.ArrayExpression: + case "ArrayExpression": for (let e of n.elements) if (e) this.walkExpr(e); return; - case b.ObjectExpression: - for (let p of n.properties) { + case "ObjectExpression": + for (const p of n.properties) { if (p.computed) this.walkExpr(p.key); - this.walkExpr(p.value); + this.walkExpr(p.value as e.Expression); } return; default: @@ -979,7 +1006,7 @@ export class ScopeAnalysis { } // assign env slots for `info` and every function below it -function assignSlots(info) { +function assignSlots(info: FnInfo): void { let next = 0; // a parent pointer is only needed in the env if this function actually // allocates one; if it doesn't, its incoming env already *is* the parent. diff --git a/lib/estree.ts b/lib/estree.ts index 917e59f9..7edc579d 100644 --- a/lib/estree.ts +++ b/lib/estree.ts @@ -462,7 +462,7 @@ export interface ExportNamedDeclaration extends BaseNode { export interface ExportDefaultDeclaration extends BaseNode { type: "ExportDefaultDeclaration"; - declaration: Expression | FunctionDeclaration | VariableDeclaration; + declaration: Expression | FunctionDeclaration | ClassDeclaration | VariableDeclaration; } export interface ExportAllDeclaration extends BaseNode { From 4173a422d643bfc13c42ea1b55b4b5a0481bc16d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 18:58:59 -0700 Subject: [PATCH 063/146] =?UTF-8?q?ts:=20eir/lower=20=E2=80=94=20AST-to-EI?= =?UTF-8?q?R=20lowering,=20fully=20typed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit LowerFunction's dozen bookkeeping stacks become declared fields with real element types (ActiveLabel, FinallyCtx — whose node is the finalizer BlockStatement, now the type says so); the environment- descriptor chain gets an EnvDesc union discriminated by isLoopEnv (FnInfo/LoopEnv gain readonly literal discriminants in scopes.ts, and FnInfo's lowered/fn lowering state is declared). The module-interop types the whole EIR boundary shares — SlotRef/ExoticRef/ModuleRef, ModCtx — are defined and exported here for integrate.ts to import. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/eir/{lower.js => lower.ts} | 703 ++++++++++++++++++--------------- lib/eir/scopes.ts | 7 +- 2 files changed, 387 insertions(+), 323 deletions(-) rename lib/eir/{lower.js => lower.ts} (75%) diff --git a/lib/eir/lower.js b/lib/eir/lower.ts similarity index 75% rename from lib/eir/lower.js rename to lib/eir/lower.ts index 68df84ca..61f9b528 100644 --- a/lib/eir/lower.js +++ b/lib/eir/lower.ts @@ -1,41 +1,78 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ // AST -> EIR lowering. // // Covers a whitelisted subset of the (desugared) AST; anything else throws -// LowerNotSupported so callers can fall back to the legacy LLVMIRVisitor -// per-function. The subset grows until nothing falls back. +// LowerNotSupported, which compile() reports as a compile error. // -// Scope resolution (lib/eir/scopes.js) runs first and decides, per binding: +// Scope resolution (lib/eir/scopes.ts) runs first and decides, per binding: // SSA local vs. environment slot. Lowering then emits make_env / -// env_load / env_store / make_closure directly — this replaces new-cc for -// the EIR path. +// env_load / env_store / make_closure directly. // // Calling convention mirrors the runtime: every function takes // (%env, %this, ...params). -// -// Handled: literals (incl. regex), identifiers (locals/captured/globals), -// var/let/const, assignment (= and compound), update (++/--), -// binary/logical/unary operators, member access, calls, new, this, -// sequence/array/object literals, untagged template literals, function -// declarations and expressions, arrow functions (full closure support, -// lexical `this` via the owner's captured this binding), default/rest -// parameters, `arguments`, if/else, while, do-while, for, for-of, -// for-in, switch, break/continue, return, throw, try/catch (unwind -// edges), try/finally (finalizer duplication), per-iteration loop -// environments, and the %-intrinsic calls listed in intrinsics.js -// (produced by the pre-EIR desugar passes, e.g. %arrayFromSpread). - -import * as b from "../ast-builder"; + import { FunctionBuilder } from "./builder"; -import { Module } from "./ir"; -import { ScopeAnalysis, compound_assign_ops } from "./scopes"; -import { LowerNotSupported, isLowerNotSupported } from "./errors"; +import { Module, Func, Block, Inst } from "./ir"; +import { ScopeAnalysis, compound_assign_ops, Binding, FnInfo, LoopEnv } from "./scopes"; +import { LowerNotSupported } from "./errors"; import { eir_intrinsics } from "./intrinsics"; +import type * as e from "../estree"; +import type { ModuleInfo } from "../module-info"; + +// --- module-scope interop types (integrate.ts imports these) ----------------- + +// a module-slot-backed (or const-folded) reference +export interface SlotRef { + module: string | null; // "%self", a module path, or null for fold-only + slot: number; + constval?: e.Literal; + writable: boolean; + exotic?: undefined; + module_info?: undefined; +} + +// a namespace import: the module object itself (module_get_exotic); +// member accesses resolve to slot loads at compile time +export interface ExoticRef { + exotic: string; + module_info: ModuleInfo; + writable: boolean; + module?: undefined; + slot?: undefined; + constval?: undefined; +} + +export type ModuleRef = SlotRef | ExoticRef; -const binops = { +export interface ModCtx { + refs: Map; + this_module_info?: ModuleInfo | null; + module_infos?: Map | null; +} + +// an environment-descriptor chain node: a per-iteration loop env or a +// function env (see envForBinding) +type EnvDesc = LoopEnv | FnInfo; + +interface ActiveLabel { + name: string; + breakBlock: Block; + continueBlock: Block | null; + ctxLen: number; +} + +interface FinallyCtx { + // the finalizer block; fresh copies lower at each crossing exit + node: e.BlockStatement; + breakDepth: number; + continueDepth: number; + handlerDepth: number; +} + +const binops: Record = { "+": "add", "-": "sub", "*": "mul", @@ -60,60 +97,68 @@ const binops = { }; // the source-level name a closure should carry (Function.prototype.name): -// the function's own id, or "" for anonymous functions — never the +// the function\'s own id, or "" for anonymous functions — never the // scope-qualified EIR name -function displayNameOf(childInfo) { +function displayNameOf(childInfo: FnInfo): string { return (childInfo.node.id && childInfo.node.id.name) || ""; } class LowerFunction { - constructor(info, analysis, module, mod_ctx) { - this.info = info; // FnInfo from scope analysis + info: FnInfo; // FnInfo from scope analysis + analysis: ScopeAnalysis; + module: Module; + // toplevel-as-EIR: this function IS the module toplevel; import/ + // export statements lower here, and slot-backed declarations store + // through module slots instead of local bindings + isToplevel: boolean; + // module-scope interop: module-slot references (imports and this + // module's exports) + mod_ctx: ModCtx; + b: FunctionBuilder; + envParam: Inst; + thisParam: Inst; + // break/continue targets. loops push onto both stacks; switch + // statements only onto breakTargets (continue passes through a + // switch to the enclosing loop). + breakTargets: Block[] = []; + continueTargets: Block[] = []; + // labeled targets: LabeledStatement pushes loop labels onto + // pendingLabels; the loop lowering claims them (activeLabels) + // against its own exit/continue blocks. non-loop labels get a + // synthetic exit block. ctxLen = finallyCtx.length at label + // entry, so a labeled exit runs exactly the finalizers entered + // since the label. + pendingLabels: string[] = []; + activeLabels: ActiveLabel[] = []; + // materialized per-iteration loop envs lexically active at the + // current lowering position (innermost last). the current env + // value of each is tracked as a builder variable ("%loopenv#id"), + // so per-iteration refreshes flow through SSA/block params like + // any other variable (envs are ejsvals). + activeLoopEnvs: LoopEnv[] = []; + // active try/finally contexts. abrupt exits (return, break, + // continue) crossing a finally boundary lower a fresh copy of each + // crossed finalizer at the exit site (finalizer duplication). + finallyCtx: FinallyCtx[] = []; + curEnv: Inst; + + constructor(info: FnInfo, analysis: ScopeAnalysis, module: Module, mod_ctx?: ModCtx) { + this.info = info; this.analysis = analysis; this.module = module; - // toplevel-as-EIR: this function IS the module toplevel; import/ - // export statements lower here, and slot-backed declarations store - // through module slots instead of local bindings this.isToplevel = !!info.isToplevel; - // module-scope interop: module-slot references (imports and this - // module's exports: name -> {module, slot, constval?, writable}) - // and sibling top-level EIR functions callable directly this.mod_ctx = mod_ctx || { refs: new Map() }; - let paramNames = info.params.map((p) => p.uid); + const paramNames = info.params.map((p) => p.uid); this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); - this.envParam = this.b.fn.entry.params[0]; - this.thisParam = this.b.fn.entry.params[1]; + this.envParam = this.b.fn.entry!.params[0]!; + this.thisParam = this.b.fn.entry!.params[1]!; // `this` reads go through the builder variable "%this" (seeded to // the entry param by the builder): a derived constructor's super() // call rebinds it (the runtime constructs the object and returns // it), and SSA carries the update. for every other function it // collapses to the entry param. - // break/continue targets. loops push onto both stacks; switch - // statements only onto breakTargets (continue passes through a - // switch to the enclosing loop). - this.breakTargets = []; - this.continueTargets = []; - // labeled targets: LabeledStatement pushes loop labels onto - // pendingLabels; the loop lowering claims them (activeLabels) - // against its own exit/continue blocks. non-loop labels get a - // synthetic exit block. ctxLen = finallyCtx.length at label - // entry, so a labeled exit runs exactly the finalizers entered - // since the label. - this.pendingLabels = []; - this.activeLabels = []; - // materialized per-iteration loop envs lexically active at the - // current lowering position (innermost last). the current env - // value of each is tracked as a builder variable ("%loopenv#id"), - // so per-iteration refreshes flow through SSA/block params like - // any other variable (envs are ejsvals). - this.activeLoopEnvs = []; - // active try/finally contexts. abrupt exits (return, break, - // continue) crossing a finally boundary lower a fresh copy of each - // crossed finalizer at the exit site (finalizer duplication). - this.finallyCtx = []; - // environment setup this.curEnv = this.envParam; if (info.envSize > 0) { @@ -146,7 +191,7 @@ class LowerFunction { // the arguments object, if referenced anywhere in this function if (info.usesArguments) { let a = this.b.emit("args_obj", [], {}); - this.writeBinding(info.argumentsBinding, a); + this.writeBinding(info.argumentsBinding!, a); } // an arrow below captures our `this`: store it in the env (kept @@ -167,9 +212,10 @@ class LowerFunction { let defaults = info.defaults || []; let ndefaults = Math.min(defaults.length, info.params.length); for (let i = 0; i < ndefaults; i++) { - if (!defaults[i]) continue; - let pb = info.params[i]; - let cur = this.readBinding(pb); + const dflt = defaults[i]; + if (!dflt) continue; + const pb = info.params[i]!; + const cur = this.readBinding(pb); let isundef = this.b.emit("strict_eq", [cur, this.b.constUndefined()], {}); let ubool = this.b.emit("to_boolean", [isundef], {}); let dflt_bb = this.b.newBlock(`default_${pb.name}`); @@ -177,7 +223,7 @@ class LowerFunction { this.b.condBr(ubool, dflt_bb, [], join_bb, []); this.b.sealBlock(dflt_bb); this.b.setInsertPoint(dflt_bb); - let dv = this.expr(defaults[i]); + const dv = this.expr(dflt); this.writeBinding(pb, dv); this.b.br(join_bb, []); this.b.sealBlock(join_bb); @@ -197,7 +243,7 @@ class LowerFunction { } } - findChildFn(binding) { + findChildFn(binding: Binding): FnInfo { for (let c of this.info.children) { if (c.node.id && c.node.id.name === binding.name) return c; } @@ -213,21 +259,21 @@ class LowerFunction { // from the current lowering position to the descriptor holding the // binding, emitting one env_load per hop. - levar(le) { + levar(le: LoopEnv): string { return `%loopenv#${le.id}`; } // the env value make_closure should capture at the current position - curEnvValue() { + curEnvValue(): Inst { if (this.activeLoopEnvs.length > 0) { - let le = this.activeLoopEnvs[this.activeLoopEnvs.length - 1]; + const le = this.activeLoopEnvs[this.activeLoopEnvs.length - 1]!; return this.b.readVariable(this.levar(le), this.b.cur); } return this.curEnv; } // the innermost materialized descriptor at f's definition site - descAtCreation(f) { + descAtCreation(f: FnInfo): EnvDesc | null { let le = f.creationLoopEnv; while (le && !le.materialized) le = le.parentCandidate; if (le) return le; @@ -238,7 +284,7 @@ class LowerFunction { } // the descriptor whose env value lives in desc's parent slot - parentDescOf(desc) { + parentDescOf(desc: EnvDesc): EnvDesc | null { if (desc.isLoopEnv) { // slot 0 holds curEnv at loop entry: the nearest enclosing // materialized loop env, else the function env, else the @@ -246,8 +292,8 @@ class LowerFunction { let le = desc.parentCandidate; while (le && !le.materialized) le = le.parentCandidate; if (le) return le; - if (desc.fnInfo.envSize > 0) return desc.fnInfo; - return this.descAtCreation(desc.fnInfo); + if (desc.fnInfo!.envSize > 0) return desc.fnInfo!; + return this.descAtCreation(desc.fnInfo!); } // a function env's parent slot holds its incoming env return this.descAtCreation(desc); @@ -256,7 +302,7 @@ class LowerFunction { // fresh per-iteration env for captured let/const declared in the loop // BODY: emitted at the top of the body block each iteration. their // declarations re-execute per pass, so nothing copies forward. - enterLoopBody(n) { + enterLoopBody(n: e.Node): LoopEnv | null { let ble = this.analysis.loopBodyEnvOf(n); if (!ble) return null; let outer = this.curEnvValue(); @@ -267,13 +313,13 @@ class LowerFunction { return ble; } - leaveLoopBody(ble) { + leaveLoopBody(ble: LoopEnv | null): void { if (ble) this.activeLoopEnvs.pop(); } // a loop lowering claims any labels the enclosing LabeledStatement(s) // queued, binding them to its own break/continue blocks - claimPendingLabels(breakBlock, continueBlock) { + claimPendingLabels(breakBlock: Block, continueBlock: Block | null): number { let n = this.pendingLabels.length; for (let name of this.pendingLabels) this.activeLabels.push({ @@ -286,25 +332,27 @@ class LowerFunction { return n; } - releaseLabels(n) { + releaseLabels(n: number): void { while (n-- > 0) this.activeLabels.pop(); } - findLabel(name, loc) { + findLabel(name: string, loc: e.SourceLocation | null | undefined): ActiveLabel { for (let i = this.activeLabels.length - 1; i >= 0; i--) - if (this.activeLabels[i].name === name) return this.activeLabels[i]; + if (this.activeLabels[i]!.name === name) return this.activeLabels[i]!; throw LowerNotSupported(`unknown label '${name}'`, loc); } // the environment holding `binding`, from the current position - envForBinding(binding) { + envForBinding(binding: Binding): Inst { let target = binding.loopEnv && binding.loopEnv.materialized ? binding.loopEnv : binding.fnInfo; - let desc, env; + let desc: EnvDesc | null; + let env: Inst; if (this.activeLoopEnvs.length > 0) { - desc = this.activeLoopEnvs[this.activeLoopEnvs.length - 1]; - env = this.b.readVariable(this.levar(desc), this.b.cur); + const top = this.activeLoopEnvs[this.activeLoopEnvs.length - 1]!; + desc = top; + env = this.b.readVariable(this.levar(top), this.b.cur); } else if (this.info.envSize > 0) { desc = this.info; env = this.curEnv; @@ -316,7 +364,9 @@ class LowerFunction { while (desc && desc !== target) { let slot = desc.isLoopEnv ? 0 : desc.parentSlot; if (slot < 0) - throw new Error(`EIR lowering: broken env chain through ${desc.name}`); + throw new Error( + `EIR lowering: broken env chain through ${desc.isLoopEnv ? `loopenv#${desc.id}` : desc.name}` + ); env = this.b.emit("env_load", [env], { slot: slot }); desc = this.parentDescOf(desc); } @@ -324,13 +374,13 @@ class LowerFunction { return env; } - readBinding(binding) { + readBinding(binding: Binding): Inst { if (!binding.captured) return this.b.readVariable(binding.uid, this.b.cur); let env = this.envForBinding(binding); return this.b.emit("env_load", [env], { slot: binding.slot }); } - writeBinding(binding, value) { + writeBinding(binding: Binding, value: Inst): void { if (!binding.captured) { this.b.writeVariable(binding.uid, this.b.cur, value); return; @@ -341,50 +391,50 @@ class LowerFunction { // --- expressions ---------------------------------------------------------- - expr(n) { + expr(n: e.Expression | e.SpreadElement): Inst { switch (n.type) { - case b.Literal: + case "Literal": return this.literal(n); - case b.Identifier: + case "Identifier": return this.identifier(n); - case b.ThisExpression: { + case "ThisExpression": { // resolved to a binding = an arrow's lexical this (the // owner's captured this, read through the env chain) let binding = this.analysis.resolve(n); if (binding) return this.readBinding(binding); return this.b.readVariable("%this", this.b.cur); } - case b.BinaryExpression: + case "BinaryExpression": return this.binary(n); - case b.LogicalExpression: + case "LogicalExpression": return this.logical(n); - case b.UnaryExpression: + case "UnaryExpression": return this.unary(n); - case b.AssignmentExpression: + case "AssignmentExpression": return this.assignment(n); - case b.UpdateExpression: + case "UpdateExpression": return this.update(n); - case b.TemplateLiteral: + case "TemplateLiteral": return this.template(n); - case b.TaggedTemplateExpression: + case "TaggedTemplateExpression": return this.taggedTemplate(n); - case b.CallExpression: + case "CallExpression": return this.call(n); - case b.NewExpression: + case "NewExpression": return this.newExpr(n); - case b.MemberExpression: + case "MemberExpression": return this.member(n); - case b.ConditionalExpression: + case "ConditionalExpression": return this.conditional(n); - case b.FunctionExpression: - case b.ArrowFunctionExpression: + case "FunctionExpression": + case "ArrowFunctionExpression": return this.functionExpr(n); - case b.SequenceExpression: { - let v; - for (let e of n.expressions) v = this.expr(e); - return v; + case "SequenceExpression": { + let v: Inst | undefined; + for (const sub of n.expressions) v = this.expr(sub); + return v!; } - case b.ArrayExpression: { + case "ArrayExpression": { // holes must stay holes (forEach etc. skip them; undefined // wouldn't be skipped). written with plain loops: the // arrow-based form of this case miscompiled under the @@ -392,8 +442,8 @@ class LowerFunction { let holes = false; for (let el of n.elements) if (!el) holes = true; if (!holes) { - let elems = []; - for (let el of n.elements) elems.push(this.expr(el)); + const elems: Inst[] = []; + for (const el of n.elements) elems.push(this.expr(el!)); return this.b.emit("make_array", elems, {}); } let vals = []; @@ -409,19 +459,23 @@ class LowerFunction { indices: indices, }); } - case b.ObjectExpression: { + case "ObjectExpression": { let hasAccessors = n.properties.some((p) => p.kind && p.kind !== "init"); if (hasAccessors) return this.objectWithAccessors(n); let hasComputed = n.properties.some( - (p) => p.computed || (p.key.type !== b.Identifier && p.key.type !== b.Literal) + (p) => p.computed || (p.key.type !== "Identifier" && p.key.type !== "Literal") ); let hasProto = n.properties.some((p) => this.isProtoProp(p)); if (!hasComputed && !hasProto) { - let keys = []; - let values = []; - for (let p of n.properties) { - keys.push(p.key.type === b.Identifier ? p.key.name : String(p.key.value)); - values.push(this.expr(p.value)); + const keys: string[] = []; + const values: Inst[] = []; + for (const p of n.properties) { + keys.push( + p.key.type === "Identifier" + ? p.key.name + : String((p.key as e.Literal).value) + ); + values.push(this.expr(p.value as e.Expression)); } return this.b.emit("make_object", values, { keys: keys }); } @@ -431,18 +485,18 @@ class LowerFunction { let obj = this.b.emit("make_object", [], { keys: [] }); for (let p of n.properties) { if (this.isProtoProp(p)) { - let v = this.expr(p.value); + const v = this.expr(p.value as e.Expression); this.b.emit("call_runtime", [obj, v], { name: "object_literal_set_proto", }); - } else if (!p.computed && (p.key.type === b.Identifier || p.key.type === b.Literal)) { - let v = this.expr(p.value); + } else if (!p.computed && (p.key.type === "Identifier" || p.key.type === "Literal")) { + const v = this.expr(p.value as e.Expression); this.b.emit("set_prop_atom", [obj, v], { - atom: p.key.type === b.Identifier ? p.key.name : String(p.key.value), + atom: p.key.type === "Identifier" ? p.key.name : String((p.key as e.Literal).value), }); } else { let k = this.expr(p.key); - let v = this.expr(p.value); + const v = this.expr(p.value as e.Expression); this.b.emit("set_prop", [obj, k, v], {}); } } @@ -456,11 +510,11 @@ class LowerFunction { // `__proto__: expr` in an object literal (non-computed, non-method, // non-shorthand, string or identifier key) is a prototype definition, // not an own property (B.3.1 / PropertyDefinitionEvaluation) - isProtoProp(p) { + isProtoProp(p: e.Property): boolean { if (p.computed || p.method || p.shorthand) return false; if (p.kind && p.kind !== "init") return false; - if (p.key.type === b.Identifier) return p.key.name === "__proto__"; - return p.key.type === b.Literal && p.key.value === "__proto__"; + if (p.key.type === "Identifier") return p.key.name === "__proto__"; + return p.key.type === "Literal" && p.key.value === "__proto__"; } // an object literal containing get/set accessors: empty object, then @@ -470,44 +524,44 @@ class LowerFunction { // #14). computed-key accessors each define separately in source // order (their keys are distinct evaluations); the runtime merges // the partial descriptors. - objectWithAccessors(n) { + objectWithAccessors(n: e.ObjectExpression): Inst { let obj = this.b.emit("make_object", [], { keys: [] }); - let done = new Set(); + const done = new Set(); for (let i = 0; i < n.properties.length; i++) { - let p = n.properties[i]; + const p = n.properties[i]!; if (p.computed) { let key = this.expr(p.key); if (p.kind && p.kind !== "init") { - let accessor = this.expr(p.value); + const accessor = this.expr(p.value as e.Expression); this.b.emit("define_accessor_computed", [obj, key, accessor], { kind: p.kind, }); } else { - let v = this.expr(p.value); + const v = this.expr(p.value as e.Expression); this.b.emit("set_prop", [obj, key, v], {}); } continue; } - if (p.key.type !== b.Identifier && p.key.type !== b.Literal) + if (p.key.type !== "Identifier" && p.key.type !== "Literal") throw LowerNotSupported(`accessor object literal key ${p.key.type}`, n.loc); if (this.isProtoProp(p)) { - let v = this.expr(p.value); + const v = this.expr(p.value as e.Expression); this.b.emit("call_runtime", [obj, v], { name: "object_literal_set_proto" }); continue; } - let name = p.key.type === b.Identifier ? p.key.name : String(p.key.value); + const name = p.key.type === "Identifier" ? p.key.name : String((p.key as e.Literal).value); if (p.kind && p.kind !== "init") { if (done.has(name)) continue; // the pair lowered together done.add(name); - let getter = null; - let setter = null; + let getter: Inst | null = null; + let setter: Inst | null = null; for (let j = i; j < n.properties.length; j++) { - let q = n.properties[j]; + const q = n.properties[j]!; if (q.kind === "init" || q.computed) continue; - let qname = q.key.type === b.Identifier ? q.key.name : String(q.key.value); + const qname = q.key.type === "Identifier" ? q.key.name : String((q.key as e.Literal).value); if (qname !== name) continue; - if (q.kind === "get") getter = this.expr(q.value); - else if (q.kind === "set") setter = this.expr(q.value); + if (q.kind === "get") getter = this.expr(q.value as e.Expression); + else if (q.kind === "set") setter = this.expr(q.value as e.Expression); } this.b.emit( "define_accessor", @@ -515,14 +569,14 @@ class LowerFunction { { atom: name } ); } else { - let v = this.expr(p.value); + const v = this.expr(p.value as e.Expression); this.b.emit("set_prop_atom", [obj, v], { atom: name }); } } return obj; } - literal(n) { + literal(n: e.Literal): Inst { if (n.value === null) return this.b.constNull(); switch (typeof n.value) { case "number": @@ -552,7 +606,7 @@ class LowerFunction { } } - identifier(n) { + identifier(n: e.Identifier): Inst { if (n.name === "undefined") return this.b.constUndefined(); let binding = this.analysis.resolve(n); if (binding === null || binding === undefined) { @@ -573,7 +627,7 @@ class LowerFunction { return this.readBinding(binding); } - functionExpr(n) { + functionExpr(n: e.FunctionExpression | e.ArrowFunctionExpression): Inst { let childInfo = this.analysis.infoFor(n); if (!childInfo) throw new Error("EIR lowering: unanalyzed function expression"); lowerOneFunction(childInfo, this.analysis, this.module, this.mod_ctx); @@ -585,7 +639,7 @@ class LowerFunction { }); } - binary(n) { + binary(n: e.BinaryExpression): Inst { let op = binops[n.operator]; if (!op) throw LowerNotSupported(`binary operator ${n.operator}`, n.loc); let l = this.expr(n.left); @@ -593,7 +647,7 @@ class LowerFunction { return this.b.emit(op, [l, r], {}); } - logical(n) { + logical(n: e.LogicalExpression): Inst { let l = this.expr(n.left); let lbool = this.b.emit("to_boolean", [l], {}); @@ -615,7 +669,7 @@ class LowerFunction { return result; } - unary(n) { + unary(n: e.UnaryExpression): Inst { let arg; switch (n.operator) { case "!": @@ -639,13 +693,13 @@ class LowerFunction { this.expr(n.argument); return this.b.constUndefined(); case "delete": { - // only member expressions (matching the legacy visitUnary) - let m = n.argument; - let obj = this.expr(m.object); - let key; - if (!m.computed && m.property.type === b.Identifier) - key = this.b.constAtom(m.property.name); - else key = this.expr(m.property); + // only member expressions (scopes rejected everything else) + const m = n.argument as e.MemberExpression; + const obj = this.expr(m.object as e.Expression); + const key = + !m.computed && m.property.type === "Identifier" + ? this.b.constAtom(m.property.name) + : this.expr(m.property); return this.b.emit("delete_prop", [obj, key], {}); } default: @@ -656,7 +710,7 @@ class LowerFunction { // the one-time declaration store for a slot-backed toplevel binding: // unlike writeIdentifier this may store to read-only refs (an exported // const's initializer is a legitimate store) - writeModuleSlotInit(idNode, value) { + writeModuleSlotInit(idNode: e.Identifier, value: Inst): void { let ref = this.mod_ctx.refs.get(idNode.name); if (!ref || ref.module === undefined || ref.slot === undefined || ref.slot < 0) throw LowerNotSupported( @@ -667,7 +721,7 @@ class LowerFunction { } // store `value` into this module's export slot named `exportName` - storeExportSlot(exportName, value, loc) { + storeExportSlot(exportName: string, value: Inst, loc: e.SourceLocation | null | undefined): void { let tmi = this.mod_ctx.this_module_info; let export_info = tmi && tmi.exports.get(exportName); if (!export_info) @@ -680,7 +734,7 @@ class LowerFunction { // store `value` into the identifier `idNode` (local binding, writable // module slot, or global) - writeIdentifier(idNode, value) { + writeIdentifier(idNode: e.Identifier, value: Inst): void { let binding = this.analysis.resolve(idNode); if (binding === null || binding === undefined) { let ref = this.mod_ctx.refs.get(idNode.name); @@ -702,11 +756,12 @@ class LowerFunction { this.writeBinding(binding, value); } - assignment(n) { - let binop = n.operator === "=" ? null : binops[compound_assign_ops[n.operator]]; + assignment(n: e.AssignmentExpression): Inst { + const desugared = compound_assign_ops[n.operator]; + const binop = n.operator === "=" || !desugared ? null : binops[desugared]; if (n.operator !== "=" && !binop) throw LowerNotSupported(`assignment operator ${n.operator}`, n.loc); - if (n.left.type === b.Identifier) { + if (n.left.type === "Identifier") { let v; if (binop) { let cur = this.identifier(n.left); @@ -718,58 +773,58 @@ class LowerFunction { this.writeIdentifier(n.left, v); return v; } - if (n.left.type === b.MemberExpression) { + if (n.left.type === "MemberExpression") { // evaluate the object (and computed key) exactly once - let obj = this.expr(n.left.object); - let atom = null; - let key = null; - if (!n.left.computed && n.left.property.type === b.Identifier) + const obj = this.expr(n.left.object as e.Expression); + let atom: string | null = null; + let key: Inst | null = null; + if (!n.left.computed && n.left.property.type === "Identifier") atom = n.left.property.name; else key = this.expr(n.left.property); - let v; + let v: Inst; if (binop) { - let cur = + const cur = atom !== null ? this.b.emit("get_prop_atom", [obj], { atom: atom }) - : this.b.emit("get_prop", [obj, key], {}); - let rhs = this.expr(n.right); + : this.b.emit("get_prop", [obj, key!], {}); + const rhs = this.expr(n.right); v = this.b.emit(binop, [cur, rhs], {}); } else { v = this.expr(n.right); } if (atom !== null) this.b.emit("set_prop_atom", [obj, v], { atom: atom }); - else this.b.emit("set_prop", [obj, key, v], {}); + else this.b.emit("set_prop", [obj, key!, v], {}); return v; } throw LowerNotSupported(`assignment target ${n.left.type}`, n.loc); } // ++/--: ToNumber(old value) via unary_plus, then add/sub 1 - update(n) { + update(n: e.UpdateExpression): Inst { let one = this.b.constNumber(1); let op = n.operator === "++" ? "add" : "sub"; - if (n.argument.type === b.Identifier) { + if (n.argument.type === "Identifier") { let cur = this.identifier(n.argument); let old = this.b.emit("unary_plus", [cur], {}); let nv = this.b.emit(op, [old, one], {}); this.writeIdentifier(n.argument, nv); return n.prefix ? nv : old; } - if (n.argument.type === b.MemberExpression) { - let m = n.argument; - let obj = this.expr(m.object); - let atom = null; - let key = null; - if (!m.computed && m.property.type === b.Identifier) atom = m.property.name; + if (n.argument.type === "MemberExpression") { + const m = n.argument; + const obj = this.expr(m.object as e.Expression); + let atom: string | null = null; + let key: Inst | null = null; + if (!m.computed && m.property.type === "Identifier") atom = m.property.name; else key = this.expr(m.property); - let cur = + const cur = atom !== null ? this.b.emit("get_prop_atom", [obj], { atom: atom }) - : this.b.emit("get_prop", [obj, key], {}); - let old = this.b.emit("unary_plus", [cur], {}); - let nv = this.b.emit(op, [old, one], {}); + : this.b.emit("get_prop", [obj, key!], {}); + const old = this.b.emit("unary_plus", [cur], {}); + const nv = this.b.emit(op, [old, one], {}); if (atom !== null) this.b.emit("set_prop_atom", [obj, nv], { atom: atom }); - else this.b.emit("set_prop", [obj, key, nv], {}); + else this.b.emit("set_prop", [obj, key!, nv], {}); return n.prefix ? nv : old; } throw LowerNotSupported(`update of ${n.argument.type}`, n.loc); @@ -778,17 +833,17 @@ class LowerFunction { // untagged template literal: the inlined default handler — zip cooked // strings and ToString'ed substitutions with string_concat (matching // the legacy handleTemplateDefaultHandlerCall) - template(n) { - let strval = null; - let concat = (s) => { + template(n: e.TemplateLiteral): Inst { + let strval: Inst | null = null; + const concat = (s: Inst) => { if (!strval) strval = s; else strval = this.b.emit("call_runtime", [strval, s], { name: "string_concat" }); }; for (let i = 0; i < n.quasis.length; i++) { - let cooked = n.quasis[i].value.cooked; + const cooked = n.quasis[i]!.value.cooked; if (cooked.length !== 0) concat(this.b.constAtom(cooked)); if (i < n.expressions.length) { - let sub = this.expr(n.expressions[i]); + const sub = this.expr(n.expressions[i]!); concat(this.b.emit("call_runtime", [sub], { name: "ToString" })); } } @@ -798,17 +853,17 @@ class LowerFunction { // tag`lit ${x}` -> tag(callsite, x): the callsite object is a // per-site cached frozen array (template_callsite); member tags keep // their receiver as `this`, like any method call - taggedTemplate(n) { + taggedTemplate(n: e.TaggedTemplateExpression): Inst { let callsite = this.b.emit("template_callsite", [], { cooked: n.quasi.quasis.map((q) => q.value.cooked), raw: n.quasi.quasis.map((q) => q.value.raw), }); - let subs = n.quasi.expressions.map((e) => this.expr(e)); + const subs = n.quasi.expressions.map((sub) => this.expr(sub)); - let callee, thisArg; - if (n.tag.type === b.MemberExpression) { - thisArg = this.expr(n.tag.object); - if (!n.tag.computed && n.tag.property.type === b.Identifier) + let callee: Inst, thisArg: Inst; + if (n.tag.type === "MemberExpression") { + thisArg = this.expr(n.tag.object as e.Expression); + if (!n.tag.computed && n.tag.property.type === "Identifier") callee = this.b.emit("get_prop_atom", [thisArg], { atom: n.tag.property.name }); else { let key = this.expr(n.tag.property); @@ -826,22 +881,22 @@ class LowerFunction { // module object doesn't answer runtime property lookups for its // exports. native ("@...") modules DO — they keep the runtime path. // returns the loaded value, or null if this isn't such an access. - exoticMemberLoad(n) { - if (n.object.type !== b.Identifier) return null; + exoticMemberLoad(n: e.MemberExpression): Inst | null { + if (n.object.type !== "Identifier") return null; let binding = this.analysis.resolve(n.object); if (binding !== null && binding !== undefined) return null; // shadowed let ref = this.mod_ctx.refs.get(n.object.name); if (!ref || ref.exotic === undefined || !ref.module_info) return null; if (ref.exotic[0] === "@") return null; // native: runtime lookup works let name = null; - if (!n.computed && n.property.type === b.Identifier) name = n.property.name; - else if (n.property.type === b.Literal && typeof n.property.value === "string") + if (!n.computed && n.property.type === "Identifier") name = n.property.name; + else if (n.property.type === "Literal" && typeof n.property.value === "string") name = n.property.value; if (name === null) return null; let export_info = ref.module_info.exports.get(name); if (!export_info || export_info.promoted) return null; // promoted slots are private let cv = export_info.constval; - if (cv && cv.type === b.Literal && (cv.value === null || typeof cv.value !== "object")) + if (cv && cv.type === "Literal" && (cv.value === null || typeof cv.value !== "object")) return this.literal(cv); return this.b.emit("module_slot_load", [], { module: ref.exotic, @@ -849,23 +904,23 @@ class LowerFunction { }); } - member(n) { + member(n: e.MemberExpression): Inst { let slotv = this.exoticMemberLoad(n); if (slotv) return slotv; let obj = this.expr(n.object); - if (!n.computed && n.property.type === b.Identifier) + if (!n.computed && n.property.type === "Identifier") return this.b.emit("get_prop_atom", [obj], { atom: n.property.name }); let key = this.expr(n.property); return this.b.emit("get_prop", [obj, key], {}); } - call(n) { + call(n: e.CallExpression): Inst { // %-intrinsic calls from the pre-EIR desugar passes lower through // the table in intrinsics.js (scopes.js already rejected unknowns) - if (n.callee.type === b.Identifier && n.callee.name[0] === "%") + if (n.callee.type === "Identifier" && n.callee.name[0] === "%") return this.intrinsicCall(n); let callee, thisArg; - if (n.callee.type === b.MemberExpression) { + if (n.callee.type === "MemberExpression") { // ns.member(...) on a JS namespace import: the callee resolves // to a slot load and `this` is undefined (the legacy rewrite // turns the member expression into %moduleGetSlot before call @@ -880,7 +935,7 @@ class LowerFunction { ); } thisArg = this.expr(n.callee.object); - if (!n.callee.computed && n.callee.property.type === b.Identifier) + if (!n.callee.computed && n.callee.property.type === "Identifier") callee = this.b.emit("get_prop_atom", [thisArg], { atom: n.callee.property.name, }); @@ -891,7 +946,7 @@ class LowerFunction { } else { // direct calls: recursion through the self binding skips // closure dispatch - if (n.callee.type === b.Identifier) { + if (n.callee.type === "Identifier") { let binding = this.analysis.resolve(n.callee); if (binding && binding.kind === "self" && binding.fnInfo === this.info) { let dthis = this.b.constUndefined(); @@ -908,9 +963,10 @@ class LowerFunction { return this.b.emit("call", [callee, thisArg].concat(args), {}); } - intrinsicCall(n) { - let intr = eir_intrinsics[n.callee.name]; - if (!intr) throw LowerNotSupported(`intrinsic ${n.callee.name}`, n.loc); + intrinsicCall(n: e.CallExpression): Inst { + const calleeName = (n.callee as e.Identifier).name; + const intr = eir_intrinsics[calleeName]; + if (!intr) throw LowerNotSupported(`intrinsic ${calleeName}`, n.loc); let args = n.arguments.map((a) => this.expr(a)); let v; if (intr.op) v = this.b.emit(intr.op, args, {}); @@ -926,13 +982,13 @@ class LowerFunction { return v; } - newExpr(n) { + newExpr(n: e.NewExpression): Inst { let callee = this.expr(n.callee); let args = n.arguments.map((a) => this.expr(a)); return this.b.emit("construct", [callee].concat(args), {}); } - conditional(n) { + conditional(n: e.ConditionalExpression): Inst { let cond = this.expr(n.test); let cbool = this.b.emit("to_boolean", [cond], {}); @@ -960,21 +1016,21 @@ class LowerFunction { // --- statements --------------------------------------------------------------- - stmt(n) { + stmt(n: e.Statement): void { switch (n.type) { - case b.BlockStatement: + case "BlockStatement": for (let s of n.body) { this.stmt(s); if (this.b.cur.terminated) return; } return; - case b.VariableDeclaration: + case "VariableDeclaration": for (let d of n.declarations) { - if (d.id.type === b.ObjectPattern) { + if (d.id.type === "ObjectPattern") { this.lowerObjectPatternDecl(d); continue; } - if (d.id.type !== b.Identifier) + if (d.id.type !== "Identifier") throw LowerNotSupported(`declaration pattern ${d.id.type}`, n.loc); let binding = this.analysis.resolve(d.id); if (!binding && this.isToplevel) { @@ -993,19 +1049,19 @@ class LowerFunction { // in the init captures the (env) binding the real value // is stored into below. free for uncaptured bindings // (SSA map write only). - this.writeBinding(binding, this.b.constUndefined()); - let init = d.init ? this.expr(d.init) : this.b.constUndefined(); - this.writeBinding(binding, init); + this.writeBinding(binding!, this.b.constUndefined()); + const init = d.init ? this.expr(d.init) : this.b.constUndefined(); + this.writeBinding(binding!, init); } return; - case b.FunctionDeclaration: { + case "FunctionDeclaration": { let binding = this.analysis.resolve(n.id); if (!binding && this.isToplevel) { // a slot-backed module function: lower it, then store // its closure to the slot at this statement's source // position (same hoisting caveat as the legacy // %moduleSetSlot rewrite) - let childInfo = this.analysis.infoFor(n); + const childInfo = this.analysis.infoFor(n)!; lowerOneFunction(childInfo, this.analysis, this.module, this.mod_ctx); let closure = this.b.emit("make_closure", [this.curEnvValue()], { fn: childInfo.name, @@ -1015,18 +1071,18 @@ class LowerFunction { return; } // closure was created (hoisted) at entry; lower the body now - lowerOneFunction(this.analysis.infoFor(n), this.analysis, this.module, this.mod_ctx); + lowerOneFunction(this.analysis.infoFor(n)!, this.analysis, this.module, this.mod_ctx); return; } - case b.ImportDeclaration: + case "ImportDeclaration": if (!this.isToplevel) throw LowerNotSupported("import declaration", n.loc); // module resolution happens in the toplevel scaffolding; // a bare `import "m"` also touches the module object for // parity with the legacy %moduleGetExotic rewrite if (n.specifiers.length === 0) - this.b.emit("module_get_exotic", [], { module: n.source_path.value }); + this.b.emit("module_get_exotic", [], { module: n.source_path!.value }); return; - case b.ExportNamedDeclaration: { + case "ExportNamedDeclaration": { if (!this.isToplevel) throw LowerNotSupported("export declaration", n.loc); if (n.declaration && !Array.isArray(n.declaration)) return this.stmt(n.declaration); // export { a as b } from "m": copy the source module's @@ -1034,7 +1090,7 @@ class LowerFunction { // moduleGetSlot/moduleSetSlot rewrite — a snapshot, not a // live binding) if (n.source) { - let source = n.source_path.value; + const source = n.source_path!.value; let source_info = this.mod_ctx.module_infos && this.mod_ctx.module_infos.get(source); if (!source_info || source_info.isNative()) @@ -1062,30 +1118,30 @@ class LowerFunction { } return; } - case b.ExportDefaultDeclaration: { + case "ExportDefaultDeclaration": { if (!this.isToplevel) throw LowerNotSupported("export default", n.loc); - let v = this.expr(n.declaration); + const v = this.expr(n.declaration as e.Expression); this.storeExportSlot("default", v, n.loc); return; } - case b.ExpressionStatement: + case "ExpressionStatement": this.expr(n.expression); return; - case b.IfStatement: + case "IfStatement": return this.ifStmt(n); - case b.WhileStatement: + case "WhileStatement": return this.whileStmt(n); - case b.DoWhileStatement: + case "DoWhileStatement": return this.doWhileStmt(n); - case b.ForStatement: + case "ForStatement": return this.forStmt(n); - case b.ForOfStatement: + case "ForOfStatement": return this.forOfStmt(n); - case b.ForInStatement: + case "ForInStatement": return this.forInStmt(n); - case b.SwitchStatement: + case "SwitchStatement": return this.switchStmt(n); - case b.ReturnStatement: { + case "ReturnStatement": { let rv = n.argument ? this.expr(n.argument) : this.b.constUndefined(); if (this.finallyCtx.length > 0) { if (this.runFinalizers(0)) return; // a finalizer overrode control @@ -1093,23 +1149,23 @@ class LowerFunction { this.b.ret(rv); return; } - case b.ThrowStatement: + case "ThrowStatement": this.b.throwValue(this.expr(n.argument)); return; - case b.TryStatement: + case "TryStatement": return this.tryStmt(n); - case b.LabeledStatement: { + case "LabeledStatement": { // labels on loops bind to the loop's own blocks (the loop // lowering claims them); labels on anything else get a // synthetic exit block for labeled breaks let body = n.body; - while (body.type === b.LabeledStatement) body = body.body; + while (body.type === "LabeledStatement") body = body.body; let isLoop = - body.type === b.WhileStatement || - body.type === b.DoWhileStatement || - body.type === b.ForStatement || - body.type === b.ForInStatement || - body.type === b.ForOfStatement; + body.type === "WhileStatement" || + body.type === "DoWhileStatement" || + body.type === "ForStatement" || + body.type === "ForInStatement" || + body.type === "ForOfStatement"; if (isLoop) { this.pendingLabels.push(n.label.name); this.stmt(n.body); @@ -1129,7 +1185,7 @@ class LowerFunction { this.b.setInsertPoint(exit); return; } - case b.BreakStatement: { + case "BreakStatement": { if (n.label) { let l = this.findLabel(n.label.name, n.loc); if (this.finallyCtx.length > l.ctxLen) { @@ -1145,10 +1201,10 @@ class LowerFunction { if (firstCrossed !== -1) { if (this.runFinalizers(firstCrossed)) return; } - this.b.br(this.breakTargets[targetLen - 1], []); + this.b.br(this.breakTargets[targetLen - 1]!, []); return; } - case b.ContinueStatement: { + case "ContinueStatement": { if (n.label) { let l = this.findLabel(n.label.name, n.loc); if (!l.continueBlock) @@ -1166,18 +1222,18 @@ class LowerFunction { if (firstCrossed !== -1) { if (this.runFinalizers(firstCrossed)) return; } - this.b.br(this.continueTargets[targetLen - 1], []); + this.b.br(this.continueTargets[targetLen - 1]!, []); return; } - case b.EmptyStatement: - case b.DebuggerStatement: // a no-op in compiled code + case "EmptyStatement": + case "DebuggerStatement": // a no-op in compiled code return; default: throw LowerNotSupported(`statement type ${n.type}`, n.loc); } } - ifStmt(n) { + ifStmt(n: e.IfStatement): void { let cond = this.expr(n.test); let cbool = this.b.emit("to_boolean", [cond], {}); @@ -1195,14 +1251,14 @@ class LowerFunction { if (else_bb) { this.b.setInsertPoint(else_bb); - this.stmt(n.alternate); + this.stmt(n.alternate!); if (!this.b.cur.terminated) this.b.br(join_bb, []); } this.b.sealBlock(join_bb); this.b.setInsertPoint(join_bb); } - whileStmt(n) { + whileStmt(n: e.WhileStatement): void { let header = this.b.newBlock("while_header"); let body = this.b.newBlock("while_body"); let exit = this.b.newBlock("while_exit"); @@ -1232,7 +1288,7 @@ class LowerFunction { this.b.setInsertPoint(exit); } - doWhileStmt(n) { + doWhileStmt(n: e.DoWhileStatement): void { let body = this.b.newBlock("do_body"); let cond_bb = this.b.newBlock("do_cond"); let exit = this.b.newBlock("do_exit"); @@ -1261,24 +1317,24 @@ class LowerFunction { this.b.setInsertPoint(exit); } - forStmt(n) { + forStmt(n: e.ForStatement): void { // captured let/const loop vars live in a fresh env per iteration: // the initial env is created before the init declaration runs, and // each pass through the update block makes a new env, copying the // loop vars forward (so the update and next test see the copies, // and closures made in earlier iterations keep their own) let le = this.analysis.loopEnvOf(n); - let outerEnvVal = null; + let outerEnvVal: Inst | null = null; if (le) { outerEnvVal = this.curEnvValue(); let e = this.b.emit("make_env", [], { size: le.envSize }); - this.b.emit("env_store", [e, outerEnvVal], { slot: 0 }); + this.b.emit("env_store", [e, outerEnvVal!], { slot: 0 }); this.b.writeVariable(this.levar(le), this.b.cur, e); this.activeLoopEnvs.push(le); } if (n.init) { - if (n.init.type === b.VariableDeclaration) this.stmt(n.init); + if (n.init.type === "VariableDeclaration") this.stmt(n.init); else this.expr(n.init); } @@ -1316,7 +1372,7 @@ class LowerFunction { if (le) { let eold = this.b.readVariable(this.levar(le), this.b.cur); let enew = this.b.emit("make_env", [], { size: le.envSize }); - this.b.emit("env_store", [enew, outerEnvVal], { slot: 0 }); + this.b.emit("env_store", [enew, outerEnvVal!], { slot: 0 }); for (let bd of le.bindings) { let v = this.b.emit("env_load", [eold], { slot: bd.slot }); this.b.emit("env_store", [enew, v], { slot: bd.slot }); @@ -1331,19 +1387,21 @@ class LowerFunction { this.b.setInsertPoint(exit); } - lowerObjectPatternDecl(d) { - let src = d.init ? this.expr(d.init) : this.b.constUndefined(); - for (let prop of d.id.properties) { - let keyName = - prop.key.type === b.Identifier ? prop.key.name : String(prop.key.value); - let target = prop.value; - let dflt = null; - if (target.type === b.AssignmentPattern) { + lowerObjectPatternDecl(d: e.VariableDeclarator): void { + const src = d.init ? this.expr(d.init) : this.b.constUndefined(); + for (const prop of (d.id as e.ObjectPattern).properties) { + const keyName = + prop.key.type === "Identifier" + ? prop.key.name + : String((prop.key as e.Literal).value); + let target = prop.value as e.Pattern; + let dflt: e.Expression | null = null; + if (target.type === "AssignmentPattern") { dflt = target.right; target = target.left; } - let binding = this.analysis.resolve(target); - let v = this.b.emit("get_prop_atom", [src], { atom: keyName }); + const binding = this.analysis.resolve(target)!; + const v = this.b.emit("get_prop_atom", [src], { atom: keyName }); this.writeBinding(binding, v); if (dflt) { let isundef = this.b.emit("strict_eq", [v, this.b.constUndefined()], {}); @@ -1353,7 +1411,7 @@ class LowerFunction { this.b.condBr(ubool, dflt_bb, [], join_bb, []); this.b.sealBlock(dflt_bb); this.b.setInsertPoint(dflt_bb); - let dv = this.expr(dflt); + const dv = this.expr(dflt); this.writeBinding(binding, dv); this.b.br(join_bb, []); this.b.sealBlock(join_bb); @@ -1364,7 +1422,7 @@ class LowerFunction { // mirrors the legacy DesugarForOf expansion: iterable[Symbol.iterator]() // once, then `next()` per iteration, testing `.done` and binding `.value` - forOfStmt(n) { + forOfStmt(n: e.ForOfStatement): void { // a captured let/const loop var gets a fresh env each iteration // (created at the top of the body, right before the var is bound); // no copying between iterations — the binding is (re)assigned from @@ -1373,7 +1431,7 @@ class LowerFunction { // walking the RHS, so a closure there may already capture it // (reading undefined, matching the legacy alloca behavior). let le = this.analysis.loopEnvOf(n); - let outerEnvVal = null; + let outerEnvVal: Inst | null = null; if (le) { outerEnvVal = this.curEnvValue(); let e0 = this.b.emit("make_env", [], { size: le.envSize }); @@ -1405,15 +1463,15 @@ class LowerFunction { this.b.setInsertPoint(body); if (le) { let e = this.b.emit("make_env", [], { size: le.envSize }); - this.b.emit("env_store", [e, outerEnvVal], { slot: 0 }); + this.b.emit("env_store", [e, outerEnvVal!], { slot: 0 }); this.b.writeVariable(this.levar(le), this.b.cur, e); } - let v = this.b.emit("get_prop_atom", [res], { atom: "value" }); - if (n.left.type === b.VariableDeclaration) { - let binding = this.analysis.resolve(n.left.declarations[0].id); + const v = this.b.emit("get_prop_atom", [res], { atom: "value" }); + if (n.left.type === "VariableDeclaration") { + const binding = this.analysis.resolve(n.left.declarations[0]!.id)!; this.writeBinding(binding, v); } else { - this.writeIdentifier(n.left, v); + this.writeIdentifier(n.left as e.Identifier, v); } let ble = this.enterLoopBody(n); this.breakTargets.push(exit); @@ -1436,11 +1494,11 @@ class LowerFunction { // prop_iterator_next / prop_iterator_current per iteration. the // iterator value is opaque (not an ejsval) and must stay a direct // instruction reference — never a block argument. - forInStmt(n) { + forInStmt(n: e.ForInStatement): void { // fresh env per iteration for a captured let/const binding, with // an initial env before the RHS evaluates — as in forOfStmt let le = this.analysis.loopEnvOf(n); - let outerEnvVal = null; + let outerEnvVal: Inst | null = null; if (le) { outerEnvVal = this.curEnvValue(); let e0 = this.b.emit("make_env", [], { size: le.envSize }); @@ -1466,15 +1524,15 @@ class LowerFunction { this.b.setInsertPoint(body); if (le) { let e = this.b.emit("make_env", [], { size: le.envSize }); - this.b.emit("env_store", [e, outerEnvVal], { slot: 0 }); + this.b.emit("env_store", [e, outerEnvVal!], { slot: 0 }); this.b.writeVariable(this.levar(le), this.b.cur, e); } - let v = this.b.emit("prop_iter_current", [iter], {}); - if (n.left.type === b.VariableDeclaration) { - let binding = this.analysis.resolve(n.left.declarations[0].id); + const v = this.b.emit("prop_iter_current", [iter], {}); + if (n.left.type === "VariableDeclaration") { + const binding = this.analysis.resolve(n.left.declarations[0]!.id)!; this.writeBinding(binding, v); } else { - this.writeIdentifier(n.left, v); + this.writeIdentifier(n.left as e.Identifier, v); } let ble = this.enterLoopBody(n); this.breakTargets.push(exit); @@ -1493,7 +1551,7 @@ class LowerFunction { this.b.setInsertPoint(exit); } - switchStmt(n) { + switchStmt(n: e.SwitchStatement): void { let disc = this.expr(n.discriminant); let exit = this.b.newBlock("switch_exit"); let bodies = n.cases.map((c, i) => this.b.newBlock(`case_body${i}`)); @@ -1501,31 +1559,32 @@ class LowerFunction { // test chain, in document order, skipping default for (let i = 0; i < n.cases.length; i++) { - if (!n.cases[i].test) continue; - let tv = this.expr(n.cases[i].test); - let cmp = this.b.emit("strict_eq", [disc, tv], {}); - let cbool = this.b.emit("to_boolean", [cmp], {}); - let next_test = this.b.newBlock(`case_test${i}`); - this.b.condBr(cbool, bodies[i], [], next_test, []); + const test = n.cases[i]!.test; + if (!test) continue; + const tv = this.expr(test); + const cmp = this.b.emit("strict_eq", [disc, tv], {}); + const cbool = this.b.emit("to_boolean", [cmp], {}); + const next_test = this.b.newBlock(`case_test${i}`); + this.b.condBr(cbool, bodies[i]!, [], next_test, []); this.b.sealBlock(next_test); this.b.setInsertPoint(next_test); } // no test matched: default body, or out - this.b.br(defaultIdx >= 0 ? bodies[defaultIdx] : exit, []); + this.b.br(defaultIdx >= 0 ? bodies[defaultIdx]! : exit, []); // bodies, in document order, falling through to the next this.breakTargets.push(exit); for (let i = 0; i < n.cases.length; i++) { // all of bodies[i]'s preds exist now: its test edge (above) and // the fallthrough branch emitted for bodies[i-1] last iteration - this.b.sealBlock(bodies[i]); - this.b.setInsertPoint(bodies[i]); - for (let s of n.cases[i].consequent) { + this.b.sealBlock(bodies[i]!); + this.b.setInsertPoint(bodies[i]!); + for (const s of n.cases[i]!.consequent) { this.stmt(s); if (this.b.cur.terminated) break; } if (!this.b.cur.terminated) - this.b.br(i + 1 < n.cases.length ? bodies[i + 1] : exit, []); + this.b.br(i + 1 < n.cases.length ? bodies[i + 1]! : exit, []); } this.breakTargets.pop(); this.b.sealBlock(exit); @@ -1539,13 +1598,13 @@ class LowerFunction { // return/break inside a finalizer overrides control per spec, and an // exception during the copy propagates without re-running it. // returns true if a finalizer terminated the current block. - runFinalizers(from) { + runFinalizers(from: number): boolean { let savedCtx = this.finallyCtx; let savedHandlers = this.b.handlers; for (let i = savedCtx.length - 1; i >= from; i--) { this.finallyCtx = savedCtx.slice(0, i); - this.b.handlers = savedHandlers.slice(0, savedCtx[i].handlerDepth); - this.stmt(savedCtx[i].node); + this.b.handlers = savedHandlers.slice(0, savedCtx[i]!.handlerDepth); + this.stmt(savedCtx[i]!.node); if (this.b.cur.terminated) { this.finallyCtx = savedCtx; this.b.handlers = savedHandlers; @@ -1557,7 +1616,7 @@ class LowerFunction { return false; } - tryStmt(n) { + tryStmt(n: e.TryStatement): void { if (n.finalizer) return this.tryFinallyStmt(n); let handler = n.handlers[0]; let catch_bb = this.b.newCatchBlock("catch"); @@ -1570,11 +1629,11 @@ class LowerFunction { this.b.sealBlock(catch_bb); this.b.setInsertPoint(catch_bb); - if (handler.param) { - let binding = this.analysis.resolve(handler.param); - this.writeBinding(binding, catch_bb.params[0]); + if (handler!.param) { + const binding = this.analysis.resolve(handler!.param)!; + this.writeBinding(binding, catch_bb.params[0]!); } - this.stmt(handler.body); + this.stmt(handler!.body); if (!this.b.cur.terminated) this.b.br(join_bb, []); this.b.sealBlock(join_bb); this.b.setInsertPoint(join_bb); @@ -1583,13 +1642,13 @@ class LowerFunction { // try/finally via finalizer duplication: one copy on the normal path, // one in a synthetic catch that rethrows, and copies at each abrupt // exit site (see runFinalizers). - tryFinallyStmt(n) { + tryFinallyStmt(n: e.TryStatement): void { let handler = n.handlers && n.handlers.length > 0 ? n.handlers[0] : null; let fin_catch = this.b.newCatchBlock("finally_catch"); let join_bb = this.b.newBlock("finally_join"); this.finallyCtx.push({ - node: n.finalizer, + node: n.finalizer!, breakDepth: this.breakTargets.length, continueDepth: this.continueTargets.length, handlerDepth: this.b.handlers.length, @@ -1606,8 +1665,8 @@ class LowerFunction { this.b.sealBlock(catch_bb); this.b.setInsertPoint(catch_bb); if (handler.param) { - let binding = this.analysis.resolve(handler.param); - this.writeBinding(binding, catch_bb.params[0]); + const binding = this.analysis.resolve(handler.param)!; + this.writeBinding(binding, catch_bb.params[0]!); } this.stmt(handler.body); if (!this.b.cur.terminated) this.b.br(inner_join, []); @@ -1622,22 +1681,22 @@ class LowerFunction { // normal-completion copy if (!this.b.cur.terminated) { - this.stmt(n.finalizer); + this.stmt(n.finalizer!); if (!this.b.cur.terminated) this.b.br(join_bb, []); } // exceptional copy: finalizer, then rethrow this.b.sealBlock(fin_catch); this.b.setInsertPoint(fin_catch); - let exc = fin_catch.params[0]; - this.stmt(n.finalizer); + const exc = fin_catch.params[0]!; + this.stmt(n.finalizer!); if (!this.b.cur.terminated) this.b.throwValue(exc); this.b.sealBlock(join_bb); this.b.setInsertPoint(join_bb); } - finish() { + finish(): Func { if (!this.b.cur.terminated) this.b.ret(this.b.constUndefined()); return this.b.finish(); } @@ -1645,15 +1704,15 @@ class LowerFunction { // lower one analyzed function (and, transitively, function declarations / // expressions inside it) into `module`. -export function lowerAnalyzedFunction(info, analysis, module, mod_ctx) { +export function lowerAnalyzedFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, mod_ctx?: ModCtx): Func { return lowerOneFunction(info, analysis, module, mod_ctx); } -function lowerOneFunction(info, analysis, module, mod_ctx) { - if (info.lowered) return info.fn; +function lowerOneFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, mod_ctx?: ModCtx): Func { + if (info.lowered) return info.fn!; info.lowered = true; let lf = new LowerFunction(info, analysis, module, mod_ctx); - if (info.node.body.type === b.BlockStatement) lf.stmt(info.node.body); + if (info.node.body.type === "BlockStatement") lf.stmt(info.node.body); else lf.b.ret(lf.expr(info.node.body)); // expression-bodied arrow info.fn = lf.finish(); module.addFunction(info.fn); @@ -1666,7 +1725,7 @@ function lowerOneFunction(info, analysis, module, mod_ctx) { // lower a FunctionDeclaration/FunctionExpression AST node into a fresh // module; returns { module, fn } -export function lowerFunctionNode(n, name) { +export function lowerFunctionNode(n: e.Function, name?: string): { module: Module; fn: Func } { let analysis = new ScopeAnalysis(); let info = analysis.analyzeFunction(n, name); let module = new Module(info.name); @@ -1675,10 +1734,10 @@ export function lowerFunctionNode(n, name) { } // lower every top-level function declaration in a parsed program -export function lowerProgram(ast, moduleName) { +export function lowerProgram(ast: e.Program, moduleName?: string): Module { let module = new Module(moduleName || "module"); for (let s of ast.body) { - if (s.type === b.FunctionDeclaration) { + if (s.type === "FunctionDeclaration") { let analysis = new ScopeAnalysis(); let info = analysis.analyzeFunction(s); lowerOneFunction(info, analysis, module); diff --git a/lib/eir/scopes.ts b/lib/eir/scopes.ts index 158a3d97..1a3f68f9 100644 --- a/lib/eir/scopes.ts +++ b/lib/eir/scopes.ts @@ -61,6 +61,11 @@ export class Binding { } export class FnInfo { + // discriminant against LoopEnv in env-descriptor chains (lower.ts) + readonly isLoopEnv = false as const; + // set by lowering (lower.ts lowerOneFunction) + lowered = false; + fn: import("./ir").Func | null = null; node: e.Function; name: string; parent: FnInfo | null; @@ -98,7 +103,7 @@ let loopenv_id_gen = 0; export class LoopEnv { id: number; - isLoopEnv = true; + readonly isLoopEnv = true as const; fnInfo: FnInfo | null; // the function containing the loop node: e.Node; // the loop AST node parentCandidate: LoopEnv | null; // enclosing LoopEnv in the same fn, or null From 6cda66ee00ee0f10e947d4ac85b6d95150c97a56 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 19:06:49 -0700 Subject: [PATCH 064/146] =?UTF-8?q?ts:=20eir/integrate=20=E2=80=94=20modul?= =?UTF-8?q?e=20collection=20and=20accessor=20synthesis?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit collectEIRToplevel's result becomes the CollectResult discriminated union ({eir_module, accessors} | {error}) the compiler already pattern-matches; refs entries typecheck against lower.ts's SlotRef/ExoticRef union; ModuleAccessor is a named interface. The assigned-names scanner is the same documented reflective-walk unknown seam as gather-imports'. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/eir/{integrate.js => integrate.ts} | 151 +++++++++++++++---------- 1 file changed, 92 insertions(+), 59 deletions(-) rename lib/eir/{integrate.js => integrate.ts} (73%) diff --git a/lib/eir/integrate.js b/lib/eir/integrate.ts similarity index 73% rename from lib/eir/integrate.js rename to lib/eir/integrate.ts index 90931a83..c9a48be5 100644 --- a/lib/eir/integrate.js +++ b/lib/eir/integrate.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ // EIR integration: lower the whole module — toplevel statements, @@ -11,9 +11,7 @@ // - named imports from non-native modules: lowered as module_slot_load // (or folded, when the export is a const literal); // - this module's own exported bindings: module_slot_load/store against -// the "%self" module global (const-literal exports fold; exported -// functions/classes read in value position load the slot, so closure -// identity is preserved); +// the "%self" module global; // - non-exported module-level bindings with literal initializers that // are never reassigned: folded to the literal; // - non-exported module-level vars promoted to hidden slots by @@ -25,32 +23,52 @@ import * as b from "../ast-builder"; import * as debug from "../debug"; import { ScopeAnalysis } from "./scopes"; import { lowerAnalyzedFunction } from "./lower"; -import { LowerNotSupported, isLowerNotSupported } from "./errors"; +import type { ModuleRef, ModCtx } from "./lower"; +import { isLowerNotSupported } from "./errors"; import { Module } from "./ir"; import { FunctionBuilder } from "./builder"; import { verifyModule } from "./verifier"; import { printModule } from "./printer"; +import type * as e from "../estree"; +import type { ModuleInfo } from "../module-info"; +import type { CompilerOptions } from "../options"; + +// one export's accessor pair, by EIR function name (compiler.ts resolves +// them against the emitted module in emitModuleResolution) +export interface ModuleAccessor { + key: string; + getter: string; + setter: string; +} + +export type CollectResult = + | { eir_module: Module; accessors: ModuleAccessor[]; error?: undefined } + | { error: string; eir_module?: undefined; accessors?: undefined }; // --dump-after eir: print the lowered (verified) EIR module -function dumpRequested(options) { - return options && options.debug_passes && options.debug_passes.has("eir"); +function dumpRequested(options: CompilerOptions | undefined): boolean { + return !!(options && options.debug_passes && options.debug_passes.has("eir")); } -function dumpModule(filename, mode, eir_module) { +function dumpModule(filename: string, mode: string, eir_module: Module): void { console.log(`// EIR module for ${filename} (${mode})`); console.log(printModule(eir_module)); } // only primitive literals fold; regex literals are objects and need // runtime construction -function isFoldableLiteral(n) { - return n && n.type === b.Literal && (n.value === null || typeof n.value !== "object"); +function isFoldableLiteral(n: e.Expression | null | undefined): n is e.Literal { + return !!n && n.type === "Literal" && (n.value === null || typeof n.value !== "object"); } // the module-slot reference map: local name -> { module, slot, constval?, // writable }. covers named imports and this module's own exported // bindings. -function collectModuleRefs(toplevelBody, module_infos, this_module_info) { +function collectModuleRefs( + toplevelBody: e.Statement[], + module_infos: Map | null, + this_module_info: ModuleInfo | null +): Map { let refs = new Map(); // imports. native modules ("@llvm" etc) share the ModuleInfo slot @@ -60,13 +78,13 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // accesses on it are ordinary property gets. if (module_infos) { for (let stmt of toplevelBody) { - if (stmt.type !== b.ImportDeclaration) continue; + if (stmt.type !== "ImportDeclaration") continue; if (!stmt.source_path) continue; let moduleString = stmt.source_path.value; let module_info = module_infos.get(moduleString); if (!module_info) continue; for (let spec of stmt.specifiers) { - if (spec.type === b.ImportNamespaceSpecifier) { + if (spec.type === "ImportNamespaceSpecifier") { // module_info rides along so lowering can resolve // ns.member accesses to slot loads at compile time // (mirroring new-cc's visitMemberExpression rewrite — @@ -84,12 +102,12 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // one (their module object only exists at runtime) if (module_info.isNative()) continue; let imported_name; - if (spec.type === b.ImportSpecifier) imported_name = spec.imported.name; - else if (spec.type === b.ImportDefaultSpecifier) imported_name = "default"; + if (spec.type === "ImportSpecifier") imported_name = spec.imported.name; + else if (spec.type === "ImportDefaultSpecifier") imported_name = "default"; else continue; let export_info = module_info.exports.get(imported_name); if (!export_info || export_info.promoted) continue; - let entry = { + const entry: import("./lower").SlotRef = { module: moduleString, slot: export_info.slot_num, writable: false, @@ -110,16 +128,16 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // so these are set second. if (this_module_info) { for (let wrapped of toplevelBody) { - if (wrapped.type !== b.ExportNamedDeclaration) continue; + if (wrapped.type !== "ExportNamedDeclaration") continue; let decl = wrapped.declaration; if (!decl || Array.isArray(decl)) continue; - if (decl.type === b.VariableDeclaration) { + if (decl.type === "VariableDeclaration") { let is_const = decl.kind === "const"; for (let d of decl.declarations) { - if (d.id.type !== b.Identifier) continue; + if (d.id.type !== "Identifier") continue; if (!this_module_info.exports.has(d.id.name)) continue; - let export_info = this_module_info.exports.get(d.id.name); - let entry = { + const export_info = this_module_info.exports.get(d.id.name)!; + const entry: import("./lower").SlotRef = { module: "%self", slot: export_info.slot_num, writable: !is_const, @@ -131,7 +149,7 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { refs.set(d.id.name, entry); } } else if ( - (decl.type === b.FunctionDeclaration || decl.type === b.ClassDeclaration) && + (decl.type === "FunctionDeclaration" || decl.type === "ClassDeclaration") && decl.id ) { // an exported function/class read in value position loads @@ -139,7 +157,7 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // in — identity-correct, unlike minting a new closure per // reference. writes fall back (writable: false). if (!this_module_info.exports.has(decl.id.name)) continue; - let export_info = this_module_info.exports.get(decl.id.name); + const export_info = this_module_info.exports.get(decl.id.name)!; refs.set(decl.id.name, { module: "%self", slot: export_info.slot_num, @@ -156,9 +174,9 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // read-only. if (this_module_info) { for (let stmt of toplevelBody) { - if (stmt.type === b.VariableDeclaration) { + if (stmt.type === "VariableDeclaration") { for (let d of stmt.declarations) { - if (d.id.type !== b.Identifier) continue; + if (d.id.type !== "Identifier") continue; if (refs.has(d.id.name)) continue; let export_info = this_module_info.exports.get(d.id.name); if (!export_info || !export_info.promoted) continue; @@ -169,7 +187,7 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { }); } } else if ( - (stmt.type === b.FunctionDeclaration || stmt.type === b.ClassDeclaration) && + (stmt.type === "FunctionDeclaration" || stmt.type === "ClassDeclaration") && stmt.id ) { if (refs.has(stmt.id.name)) continue; @@ -189,11 +207,15 @@ function collectModuleRefs(toplevelBody, module_infos, this_module_info) { // non-exported module-level bindings with literal initializers that are // never reassigned: fold-only refs (no slot) -function addModuleConstLiterals(toplevelBody, assigned, refs) { +function addModuleConstLiterals( + toplevelBody: e.Statement[], + assigned: Set, + refs: Map +): void { for (let stmt of toplevelBody) { - if (stmt.type !== b.VariableDeclaration) continue; // exported ones already in refs + if (stmt.type !== "VariableDeclaration") continue; // exported ones already in refs for (let d of stmt.declarations) { - if (d.id.type !== b.Identifier) continue; + if (d.id.type !== "Identifier") continue; if (!isFoldableLiteral(d.init)) continue; if (assigned.has(d.id.name)) continue; if (refs.has(d.id.name)) continue; @@ -204,24 +226,27 @@ function addModuleConstLiterals(toplevelBody, assigned, refs) { // module-scope names that are ever assigned at the top level; calls into // those can't be made direct and their literals can't fold -function collectAssignedNames(toplevelBody) { - let assigned = new Set(); - let walk = (n) => { +function collectAssignedNames(toplevelBody: e.Statement[]): Set { + const assigned = new Set(); + // reflective object-graph walk (the same legitimate-unknown seam as + // gather-imports' var scanner) + const walk = (n: unknown): void => { if (!n || typeof n !== "object") return; if (Array.isArray(n)) { - for (let el of n) walk(el); + for (const el of n) walk(el); return; } + const node = n as e.Node; // conservatively descend everywhere, including into nested // functions: a nested assignment to a module-scope name still // invalidates direct calls / const folding. - if (n.type === b.AssignmentExpression && n.left && n.left.type === b.Identifier) - assigned.add(n.left.name); - if (n.type === b.UpdateExpression && n.argument && n.argument.type === b.Identifier) - assigned.add(n.argument.name); - for (let k of Object.keys(n)) { + if (node.type === "AssignmentExpression" && node.left && node.left.type === "Identifier") + assigned.add(node.left.name); + if (node.type === "UpdateExpression" && node.argument && node.argument.type === "Identifier") + assigned.add(node.argument.name); + for (const k of Object.keys(node)) { if (k === "loc") continue; - walk(n[k]); + walk((node as unknown as Record)[k]); } }; walk(toplevelBody); @@ -234,15 +259,15 @@ function collectAssignedNames(toplevelBody) { // thing it compiled; they're built directly as EIR now. getters fold // primitive const exports (matching the legacy getExportGetter); // everything else loads the export's slot on "%self". -function uniqueFnName(eir_module, base) { +function uniqueFnName(eir_module: Module, base: string): string { let names = new Set(eir_module.functions.map((f) => f.name)); let name = base; for (let i = 1; names.has(name); i++) name = `${base}$${i}`; return name; } -function buildModuleAccessors(eir_module, this_module_info) { - let accessors = []; +function buildModuleAccessors(eir_module: Module, this_module_info: ModuleInfo): ModuleAccessor[] { + const accessors: ModuleAccessor[] = []; this_module_info.exports.forEach((export_info, key) => { if (export_info.promoted) return; // hidden slot: no accessors @@ -251,12 +276,12 @@ function buildModuleAccessors(eir_module, this_module_info) { let fb = new FunctionBuilder(getter_name, ["%env", "%this"]); let cv = export_info.constval; let v; - if (cv && cv.type === b.Literal && cv.value === null) v = fb.constNull(); - else if (cv && cv.type === b.Literal && typeof cv.value === "number") + if (cv && cv.type === "Literal" && cv.value === null) v = fb.constNull(); + else if (cv && cv.type === "Literal" && typeof cv.value === "number") v = fb.constNumber(cv.value); - else if (cv && cv.type === b.Literal && typeof cv.value === "string") + else if (cv && cv.type === "Literal" && typeof cv.value === "string") v = fb.constAtom(cv.value); - else if (cv && cv.type === b.Literal && typeof cv.value === "boolean") + else if (cv && cv.type === "Literal" && typeof cv.value === "boolean") v = fb.constBool(cv.value); else v = fb.emit("module_slot_load", [], { @@ -297,37 +322,45 @@ function buildModuleAccessors(eir_module, this_module_info) { // stores the default-export slot. normalize to the two statements that // say exactly that; unnamed `export default function () {}` is just an // expression-form default export. -function normalizeDefaultExports(body) { +function normalizeDefaultExports(body: e.Statement[]): void { for (let i = 0; i < body.length; i++) { - let stmt = body[i]; - if (stmt.type !== b.ExportDefaultDeclaration) continue; + const stmt = body[i]!; + if (stmt.type !== "ExportDefaultDeclaration") continue; let decl = stmt.declaration; if (!decl) continue; - if (decl.type === b.FunctionDeclaration) { + if (decl.type === "FunctionDeclaration") { if (decl.id) { stmt.declaration = b.identifier(decl.id.name); body.splice(i, 0, decl); i++; } else { - decl.type = b.FunctionExpression; + // an unnamed default function is just an expression-form + // default export (in-place retype) + (decl as { type: string }).type = "FunctionExpression"; } } else if ( - decl.type === b.VariableDeclaration && + decl.type === "VariableDeclaration" && decl.declarations.length === 1 && - decl.declarations[0].id.type === b.Identifier + decl.declarations[0]!.id.type === "Identifier" ) { // `export default class Foo {}` arrives here post-DesugarClasses // as `let Foo = ` - stmt.declaration = b.identifier(decl.declarations[0].id.name); + stmt.declaration = b.identifier((decl.declarations[0]!.id as e.Identifier).name); body.splice(i, 0, decl); i++; } } } -export function collectEIRToplevel(tree, filename, module_infos, this_module_info, options) { - let toplevel = tree.body[0]; - let body = toplevel.body.body; +export function collectEIRToplevel( + tree: e.Program, + filename: string, + module_infos: Map | null, + this_module_info: ModuleInfo, + options: CompilerOptions +): CollectResult { + const toplevel = tree.body[0] as e.FunctionDeclaration; + const body = toplevel.body.body; normalizeDefaultExports(body); let assigned = collectAssignedNames(body); @@ -358,7 +391,7 @@ export function collectEIRToplevel(tree, filename, module_infos, this_module_inf toplevel.eir_module = eir_module; toplevel.eir_main = info.name; - toplevel.body = { type: b.BlockStatement, body: [], loc: toplevel.loc }; + toplevel.body = { type: "BlockStatement", body: [], loc: toplevel.loc }; debug.log(1, `EIR: ${filename}: whole module lowered (toplevel-as-EIR)`); if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); return { eir_module: eir_module, accessors: accessors }; From b6ed2037ece81384f2e20fdddfde7bd1f1486b25 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 19:15:47 -0700 Subject: [PATCH 065/146] =?UTF-8?q?ts:=20eir/emit=20=E2=80=94=20EIR-to-LLV?= =?UTF-8?q?M=20emission?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The emitter's borrowed-visitor contract becomes explicit: the VisitorSurface interface declares exactly the slice of LLVMIRVisitor it uses (runtime/binop/global interfaces, atom and literal machinery, current-function threading), which the compiler port will implement. Per-function emission state is declared with definite-assignment fields; immediate payloads are cast once per use site against the ops table's documented shapes; the llvm declarations gained the truth about createLandingPad's arity, hasPersonality, and the function bookkeeping properties (literalAllocas, topScope, bits_alloca, debug_info). Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/eir/{emit.js => emit.ts} | 283 ++++++++++++++++++++--------------- lib/llvm.d.ts | 9 +- 2 files changed, 171 insertions(+), 121 deletions(-) rename lib/eir/{emit.js => emit.ts} (79%) diff --git a/lib/eir/emit.js b/lib/eir/emit.ts similarity index 79% rename from lib/eir/emit.js rename to lib/eir/emit.ts index 4bf1cfcc..873c3087 100644 --- a/lib/eir/emit.js +++ b/lib/eir/emit.ts @@ -1,5 +1,5 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ // EIR -> LLVM emission. @@ -11,20 +11,38 @@ // requires -- locals never touch memory, and mem2reg has nothing to do. // // The emitter borrows the active LLVMIRVisitor's infrastructure (llvm -// module, abi, runtime interface, atom/string-literal machinery), so EIR -// functions and legacy functions coexist in one compilation unit. The -// legacy path calls into EIR functions through a small forwarding thunk -// (see compiler.js visitFunction), which keeps closure creation and env -// plumbing entirely on the legacy side for now. +// module, abi, runtime interface, atom/string-literal machinery) through +// the VisitorSurface interface below. import * as llvm from "@llvm"; import * as types from "../types"; import * as consts from "../consts"; +import type { ABI } from "../abi"; +import type { RuntimeInterface } from "../runtime"; +import type { Module as EIRModule, Func, Block, Inst, Target } from "./ir"; + +const ir = llvm.IRBuilder; + +// the slice of LLVMIRVisitor the emitter uses (compiler.ts implements it) +export interface VisitorSurface { + currentFunction: llvm.EjsFunction | null; + ejs_runtime: RuntimeInterface; + ejs_binops: Record; + ejs_globals: Record; + import_module_globals: Map; + this_module_global: llvm.GlobalVariable; + getAtom(str: string): llvm.Value; + createEjsValueLoad(value: llvm.Value, name: string): llvm.Value; + emitEjsvalFromPtr(ptr: llvm.Value, prefix: string): llvm.Value; + isNumber(val: llvm.Value): llvm.Value; + loadBoolEjsValue(n: boolean): llvm.Value; + loadDoubleEjsValue(n: number): llvm.Value; + loadNullEjsValue(): llvm.Value; + loadUndefinedEjsValue(): llvm.Value; +} -let ir = llvm.IRBuilder; - -// EIR opcode -> the operator key used by runtime.js's binop interface -const binop_for_op = { +// EIR opcode -> the operator key used by runtime.ts's binop interface +const binop_for_op: Record = { add: "+", sub: "-", mul: "*", @@ -48,7 +66,7 @@ const binop_for_op = { in: "in", }; -const unop_for_op = { +const unop_for_op: Record = { logical_not: "!", neg: "-", unary_plus: "+", @@ -60,16 +78,17 @@ let mangle_gen = 0; // reachable blocks of `fn` in reverse postorder (entry first). iterative // DFS: block counts are small, but the self-hosted stack isn't deep. -function rpoBlocks(fn) { - let visited = new Set([fn.entry]); - let post = []; - let stack = [{ block: fn.entry, next: 0 }]; +function rpoBlocks(fn: Func): Block[] { + const entry = fn.entry!; + const visited = new Set([entry]); + const post: Block[] = []; + const stack = [{ block: entry, next: 0 }]; while (stack.length > 0) { - let frame = stack[stack.length - 1]; - let last = frame.block.insts[frame.block.insts.length - 1]; - let targets = (last && last.targets) || []; + const frame = stack[stack.length - 1]!; + const last = frame.block.insts[frame.block.insts.length - 1]; + const targets = (last && last.targets) || []; if (frame.next < targets.length) { - let succ = targets[frame.next++].block; + const succ = targets[frame.next++]!.block; if (!visited.has(succ)) { visited.add(succ); stack.push({ block: succ, next: 0 }); @@ -84,9 +103,28 @@ function rpoBlocks(fn) { } export class EIREmitter { - // visitor: the active LLVMIRVisitor; we use its module, abi, - // ejs_runtime/ejs_binops interfaces, getAtom, and ejs_globals. - constructor(visitor) { + // the active LLVMIRVisitor: its module, abi, runtime/binop + // interfaces, getAtom, and globals + v: VisitorSurface; + abi: ABI; + module: llvm.Module; + // per-module state + llvm_fns!: Map; + // per-function state (reset in emitFunction) + eirFn!: Func; + llvmFn!: llvm.EjsFunction; + values!: Map; + blocks!: Map; + phis!: Map; + fn_argc!: llvm.Value; + fn_args_ptr!: llvm.Value; + fn_this_ptr!: llvm.Value; + fn_new_target!: llvm.Value; + scratch: llvm.AllocaInst | null = null; + scratch_type: llvm.Type | null = null; + this_slot!: llvm.AllocaInst; + + constructor(visitor: VisitorSurface & { abi: ABI; module: llvm.Module }) { this.v = visitor; this.abi = visitor.abi; this.module = visitor.module; @@ -94,7 +132,7 @@ export class EIREmitter { // declare + define every function in an EIR module; returns a Map of // eir function name -> llvm.Function - emitModule(eirModule) { + emitModule(eirModule: EIRModule): Map { let saved_insert = ir.getInsertBlock(); let fns = new Map(); @@ -115,13 +153,13 @@ export class EIREmitter { } this.llvm_fns = fns; - for (let fn of eirModule.functions) this.emitFunction(fn, fns.get(fn.name)); + for (let fn of eirModule.functions) this.emitFunction(fn, fns.get(fn.name)!); if (saved_insert) ir.setInsertPoint(saved_insert); return fns; } - emitFunction(eirFn, llvmFn) { + emitFunction(eirFn: Func, llvmFn: llvm.EjsFunction): llvm.EjsFunction { this.eirFn = eirFn; this.llvmFn = llvmFn; this.values = new Map(); // eir Inst -> llvm value @@ -138,17 +176,17 @@ export class EIREmitter { llvmFn.entry_bb = entry_bb; // literal allocas / legacy helpers want this llvmFn.literalAllocas = Object.create(null); - let args = llvmFn.args; - let env = args[0]; - let this_ptr = args[1]; - let argc = args[2]; - let args_ptr = args[3]; + const args = llvmFn.args; + const env = args[0]!; + const this_ptr = args[1]!; + const argc = args[2]!; + const args_ptr = args[3]!; // rest_args / args_obj / construct_super / new_target need the raw // calling-convention values this.fn_argc = argc; this.fn_args_ptr = args_ptr; this.fn_this_ptr = this_ptr; - this.fn_new_target = args[4]; + this.fn_new_target = args[4]!; // scratch space for outgoing call arguments, and a slot for passing // &this to the runtime's calling convention @@ -180,7 +218,7 @@ export class EIREmitter { } for (let b of order) { if (b === eirFn.entry) continue; - ir.setInsertPoint(this.blocks.get(b)); + ir.setInsertPoint(this.blocks.get(b)!); for (let p of b.params) { if (p.isException) continue; // materialized by the landingpad below let phi = ir.createPhi(types.EjsValue, b.predEdges.length, `p_${p.id}`); @@ -196,15 +234,15 @@ export class EIREmitter { // initializing stores to it whenever a literal is first used. let prologue_bb = new llvm.BasicBlock("prologue", llvmFn); ir.setInsertPoint(prologue_bb); - let entry_params = eirFn.entry.params; + const entry_params = eirFn.entry!.params; // params[0] = %env, params[1] = %this, rest are JS formals - if (entry_params.length > 0) this.values.set(entry_params[0], env); + if (entry_params.length > 0) this.values.set(entry_params[0]!, env); if (entry_params.length > 1) { let this_val = ir.createLoad(types.EjsValue, this_ptr, "this"); - this.values.set(entry_params[1], this_val); + this.values.set(entry_params[1]!, this_val); } for (let i = 2; i < entry_params.length; i++) - this.values.set(entry_params[i], this.emitArgLoad(argc, args_ptr, i - 2)); + this.values.set(entry_params[i]!, this.emitArgLoad(argc, args_ptr, i - 2)); // remember where the prologue ended; the branch into the eir entry // block is emitted *after* the body, because the legacy cached- // literal helpers append their initializing stores to the end of @@ -213,12 +251,12 @@ export class EIREmitter { // emit every block's instructions for (let b of order) { - ir.setInsertPoint(this.blocks.get(b)); + ir.setInsertPoint(this.blocks.get(b)!); for (let inst of b.insts) this.emitInst(inst); } ir.setInsertPoint(prologue_end); - ir.createBr(this.blocks.get(eirFn.entry)); + ir.createBr(this.blocks.get(eirFn.entry!)!); ir.setInsertPoint(entry_bb); ir.createBr(prologue_bb); @@ -227,10 +265,10 @@ export class EIREmitter { } // args[i] if i < argc, else undefined -- guarded load with a phi join - emitArgLoad(argc, args_ptr, i) { + emitArgLoad(argc: llvm.Value, args_ptr: llvm.Value, i: number): llvm.Value { let load_bb = new llvm.BasicBlock(`arg${i}_load`, this.llvmFn); let join_bb = new llvm.BasicBlock(`arg${i}_join`, this.llvmFn); - let from_bb = ir.getInsertBlock(); + const from_bb = ir.getInsertBlock()!; // materialize the fallback in the predecessor so it dominates the phi let undef_val = this.undef(); @@ -249,7 +287,7 @@ export class EIREmitter { return phi; } - emitCatchPrologue(eirBlock) { + emitCatchPrologue(eirBlock: Block): void { // landingpad; extract the exception; begin/end catch to fetch the // thrown ejsval. end_catch releases the C++ exception object; the // value itself is safe (conservatively scanned like any other). @@ -267,11 +305,11 @@ export class EIREmitter { let val = this.call(this.v.ejs_runtime.begin_catch, [exc], "caughtval"); this.call(this.v.ejs_runtime.end_catch, [], ""); - let exc_param = eirBlock.params[0]; + const exc_param = eirBlock.params[0]!; this.values.set(exc_param, val); } - maxOutgoingArgs(eirFn) { + maxOutgoingArgs(eirFn: Func): number { let max = 0; eirFn.forEachInst((inst) => { if (inst.op === "call") max = Math.max(max, inst.operands.length - 2); @@ -282,32 +320,38 @@ export class EIREmitter { else if (inst.op === "make_array" || inst.op === "array_from_spread") max = Math.max(max, inst.operands.length); else if (inst.op === "template_callsite") - max = Math.max(max, inst.imms.cooked.length, inst.imms.raw.length); + max = Math.max( + max, + (inst.imms["cooked"] as readonly string[]).length, + (inst.imms["raw"] as readonly string[]).length + ); }); return max; } // --- helpers ------------------------------------------------------------------- - val(operand) { - let v = this.values.get(operand); + val(operand: Inst | null | undefined): llvm.Value { + const v = operand ? this.values.get(operand) : undefined; if (v === undefined) - throw new Error(`EIR emit: no llvm value for %v${operand.id} (${operand.op})`); + throw new Error( + `EIR emit: no llvm value for %v${operand ? operand.id : ""} (${operand ? operand.op : "?"})` + ); return v; } - undef() { + undef(): llvm.Value { return this.v.loadUndefinedEjsValue(); } - call(callee, argv, name) { + call(callee: llvm.EjsFunction, argv: llvm.Value[], name?: string): llvm.Value { return this.abi.createCall(this.llvmFn, callee.type, callee, argv, name || ""); } // same shape as the legacy opencoded module slot access: a non-inbounds // GEP into the module global (see handleModuleSlotRef in compiler.js). // "%self" refers to the module being compiled. - moduleSlotRef(moduleString, slot) { + moduleSlotRef(moduleString: string, slot: number): llvm.Value { let module_global; if (moduleString === "%self") module_global = this.v.this_module_global; else module_global = this.v.import_module_globals.get(moduleString); @@ -323,19 +367,19 @@ export class EIREmitter { } // spill values into the scratch area, returning an EjsValue* to its start - spillArgs(values) { + spillArgs(values: llvm.Value[]): llvm.Value { for (let i = 0; i < values.length; i++) { - let gep = ir.createGetElementPointer( - this.scratch_type, - this.scratch, + const gep = ir.createGetElementPointer( + this.scratch_type!, + this.scratch!, [consts.int32(0), consts.int64(i)], `sp${i}` ); - ir.createStore(values[i], gep); + ir.createStore(values[i]!, gep); } return ir.createGetElementPointer( - this.scratch_type, - this.scratch, + this.scratch_type!, + this.scratch!, [consts.int32(0), consts.int64(0)], "spargs" ); @@ -343,7 +387,7 @@ export class EIREmitter { // emit a call to `callee` that respects this instruction's normal/unwind // targets (invoke) or is a plain call - emitCallLike(inst, callee, argv, name) { + emitCallLike(inst: Inst, callee: llvm.EjsFunction, argv: llvm.Value[], name?: string): llvm.Value { if (inst.targets && inst.targets.length > 0) { let normal = null; let unwind = null; @@ -353,8 +397,8 @@ export class EIREmitter { } this.addEdgeIncomings(inst, unwind); this.addEdgeIncomings(inst, normal); - let normal_bb = this.blocks.get(normal.block); - let unwind_bb = this.blocks.get(unwind.block); + const normal_bb = this.blocks.get(normal!.block)!; + const unwind_bb = this.blocks.get(unwind!.block)!; let rv = this.abi.createInvoke( this.llvmFn, callee.type, @@ -373,14 +417,14 @@ export class EIREmitter { } // fill in phi incomings for the arguments this edge passes - addEdgeIncomings(inst, target) { + addEdgeIncomings(inst: Inst, target: Target | null | undefined): void { if (!target) return; - let src_bb = ir.getInsertBlock(); + const src_bb = ir.getInsertBlock()!; let params = target.block.params; let arg_base = target.block.isCatch ? 1 : 0; for (let i = 0; i < target.args.length; i++) { - let param = params[arg_base + i]; - let phi = this.phis.get(param); + const param = params[arg_base + i]!; + const phi = this.phis.get(param); if (!phi) throw new Error("EIR emit: edge argument for missing phi"); phi.addIncoming(this.val(target.args[i]), src_bb); } @@ -388,21 +432,21 @@ export class EIREmitter { // --- instruction emission ----------------------------------------------------------- - emitInst(inst) { + emitInst(inst: Inst): llvm.Value | void { let rt = this.v.ejs_runtime; switch (inst.op) { case "const": { let v; - switch (inst.imms.kind) { + switch ((inst.imms["kind"] as string)) { case "number": - v = this.v.loadDoubleEjsValue(inst.imms.value); + v = this.v.loadDoubleEjsValue(inst.imms["value"] as number); break; case "atom": v = this.v.getAtom(String(inst.imms.value)); break; case "boolean": - v = this.v.loadBoolEjsValue(inst.imms.value); + v = this.v.loadBoolEjsValue(inst.imms["value"] as boolean); break; case "undefined": v = this.undef(); @@ -411,7 +455,7 @@ export class EIREmitter { v = this.v.loadNullEjsValue(); break; default: - throw new Error(`EIR emit: const kind ${inst.imms.kind}`); + throw new Error(`EIR emit: const kind ${(inst.imms["kind"] as string)}`); } this.values.set(inst, v); return; @@ -435,7 +479,7 @@ export class EIREmitter { ); } case "get_prop_atom": { - let key = this.v.getAtom(String(inst.imms.atom)); + let key = this.v.getAtom(String(inst.imms["atom"])); return this.emitCallLike( inst, rt.object_getprop, @@ -456,7 +500,7 @@ export class EIREmitter { ); } case "set_prop_atom": { - let key = this.v.getAtom(String(inst.imms.atom)); + let key = this.v.getAtom(String(inst.imms["atom"])); return this.emitCallLike( inst, rt.object_setprop, @@ -479,8 +523,8 @@ export class EIREmitter { // JS modules have a link-time global (matches the opencoded // legacy handleModuleGetExotic); native modules only exist // at runtime, resolved by name through module_get. - let moduleString = inst.imms.module; - let module_global; + const moduleString = String(inst.imms["module"]); + let module_global: import("@llvm").GlobalVariable | undefined; if (moduleString === "%self") module_global = this.v.this_module_global; else module_global = this.v.import_module_globals.get(moduleString); if (module_global) { @@ -493,23 +537,23 @@ export class EIREmitter { } case "module_slot_load": { - let slot_ref = this.moduleSlotRef(inst.imms.module, inst.imms.slot); + const slot_ref = this.moduleSlotRef(String(inst.imms["module"]), inst.imms["slot"] as number); this.values.set(inst, ir.createLoad(types.EjsValue, slot_ref, "module_slot")); return; } case "module_slot_store": { - let slot_ref = this.moduleSlotRef(inst.imms.module, inst.imms.slot); + const slot_ref = this.moduleSlotRef(String(inst.imms["module"]), inst.imms["slot"] as number); ir.createStore(this.val(inst.operands[0]), slot_ref); this.values.set(inst, this.val(inst.operands[0])); return; } case "get_global": { - let key = this.v.getAtom(String(inst.imms.atom)); + let key = this.v.getAtom(String(inst.imms["atom"])); return this.emitCallLike(inst, rt.global_getprop, [key], "getglobal"); } case "set_global": { - let key = this.v.getAtom(String(inst.imms.atom)); + let key = this.v.getAtom(String(inst.imms["atom"])); return this.emitCallLike( inst, rt.global_setprop, @@ -519,14 +563,14 @@ export class EIREmitter { } case "make_env": { - let rv = this.call(rt.make_closure_env, [consts.int32(inst.imms.size)], "env"); + let rv = this.call(rt.make_closure_env, [consts.int32((inst.imms["size"] as number))], "env"); this.values.set(inst, rv); return; } case "env_load": { let ref = this.call( rt.get_env_slot_ref, - [this.val(inst.operands[0]), consts.int32(inst.imms.slot)], + [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], "slotref" ); this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot")); @@ -535,7 +579,7 @@ export class EIREmitter { case "env_store": { let ref = this.call( rt.get_env_slot_ref, - [this.val(inst.operands[0]), consts.int32(inst.imms.slot)], + [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], "slotref" ); ir.createStore(this.val(inst.operands[1]), ref); @@ -543,10 +587,10 @@ export class EIREmitter { return; } case "make_closure": { - let target = this.llvm_fns.get(inst.imms.fn); - if (!target) throw new Error(`EIR emit: unknown closure target ${inst.imms.fn}`); + let target = this.llvm_fns.get((inst.imms["fn"] as string)); + if (!target) throw new Error(`EIR emit: unknown closure target ${(inst.imms["fn"] as string)}`); let name = this.v.getAtom( - String(inst.imms.name !== undefined ? inst.imms.name : inst.imms.fn) + String(inst.imms.name !== undefined ? inst.imms.name : (inst.imms["fn"] as string)) ); let rv = this.call( rt.make_closure, @@ -558,10 +602,11 @@ export class EIREmitter { } case "call": { - if (inst.imms.direct) { - let target = this.llvm_fns.get(inst.imms.direct); + const direct = inst.imms["direct"] as string | undefined; + if (direct) { + const target = this.llvm_fns.get(direct); if (!target) - throw new Error(`EIR emit: unknown direct callee ${inst.imms.direct}`); + throw new Error(`EIR emit: unknown direct callee ${direct}`); let env_val = this.val(inst.operands[0]); let this_val = this.val(inst.operands[1]); let dargs = inst.operands.slice(2).map((o) => this.val(o)); @@ -653,7 +698,7 @@ export class EIREmitter { case "make_array": { let elems = inst.operands.map((o) => this.val(o)); - if (inst.imms.indices === undefined) { + if ((inst.imms["indices"] as readonly number[]) === undefined) { let argv; if (elems.length > 0) argv = this.spillArgs(elems); else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); @@ -669,13 +714,13 @@ export class EIREmitter { // visitArrayExpression) let arr = this.call( rt.array_new, - [consts.int64(inst.imms.len), consts.bool(true)], + [consts.int64((inst.imms["len"] as number)), consts.bool(true)], "arr" ); this.values.set(inst, arr); for (let i = 0; i < elems.length; i++) { - let key = this.v.loadDoubleEjsValue(inst.imms.indices[i]); - this.call(rt.object_setprop, [arr, key, elems[i]], ""); + const key = this.v.loadDoubleEjsValue((inst.imms["indices"] as readonly number[])[i]!); + this.call(rt.object_setprop, [arr, key, elems[i]!], ""); } return arr; } @@ -684,7 +729,7 @@ export class EIREmitter { // the setter is present; the runtime merges into any // existing accessor property. enumerable+configurable, // like the atom-keyed case. - let isGet = inst.imms.kind === "get"; + let isGet = (inst.imms["kind"] as string) === "get"; let flags = 0x33 | (isGet ? 0x100 : 0x200); let accessor = this.val(inst.operands[2]); let undef = this.v.loadUndefinedEjsValue(); @@ -704,7 +749,7 @@ export class EIREmitter { case "define_accessor": { // flags 0x19 = enumerable | configurable, matching the // legacy visitObjectExpression - let key = this.v.getAtom(String(inst.imms.atom)); + let key = this.v.getAtom(String(inst.imms["atom"])); return this.emitCallLike( inst, rt.object_define_accessor_prop, @@ -735,13 +780,13 @@ export class EIREmitter { case "make_object": { let proto = ir.createLoad( types.EjsValue, - this.v.ejs_globals.Object_prototype, + this.v.ejs_globals["Object_prototype"]!, "objproto" ); let obj = this.call(rt.object_create, [proto], "obj"); this.values.set(inst, obj); for (let i = 0; i < inst.operands.length; i++) { - let key = this.v.getAtom(String(inst.imms.keys[i])); + let key = this.v.getAtom(String((inst.imms["keys"] as readonly string[])[i])); this.call(rt.object_setprop, [obj, key, this.val(inst.operands[i])], ""); } return; @@ -750,23 +795,23 @@ export class EIREmitter { // --- control flow --------------------------------------------------- case "br": { - let t = inst.targets[0]; + const t = inst.targets![0]!; this.addEdgeIncomings(inst, t); - ir.createBr(this.blocks.get(t.block)); + ir.createBr(this.blocks.get(t.block)!); return; } case "cond_br": { let cond = this.val(inst.operands[0]); // prop_iter_next produces the runtime's i8 EJSBool; every // other condition source (to_boolean) is already an i1 - if (inst.operands[0].op === "prop_iter_next") + if (inst.operands[0]!.op === "prop_iter_next") cond = ir.createICmpEq(cond, consts.True(), "moreleft_i1"); - this.addEdgeIncomings(inst, inst.targets[0]); - this.addEdgeIncomings(inst, inst.targets[1]); + this.addEdgeIncomings(inst, inst.targets![0]); + this.addEdgeIncomings(inst, inst.targets![1]); ir.createCondBr( cond, - this.blocks.get(inst.targets[0].block), - this.blocks.get(inst.targets[1].block) + this.blocks.get(inst.targets![0]!.block)!, + this.blocks.get(inst.targets![1]!.block)! ); return; } @@ -787,7 +832,7 @@ export class EIREmitter { throw_fn, [this.val(inst.operands[0])], cont, - this.blocks.get(unwind.block), + this.blocks.get(unwind!.block)!, "" ); ir.setInsertPoint(cont); @@ -808,8 +853,8 @@ export class EIREmitter { // per-site global, built lazily (a zeroed ejsval reads as // number 0.0 — the is-number check doubles as // "uninitialized"), arrays frozen, cooked.raw = raw - let cooked_strs = inst.imms.cooked; - let raw_strs = inst.imms.raw; + let cooked_strs = (inst.imms["cooked"] as readonly string[]); + let raw_strs = (inst.imms["raw"] as readonly string[]); let g = new llvm.GlobalVariable( this.module, types.EjsValue, @@ -820,15 +865,15 @@ export class EIREmitter { let loaded = this.v.createEjsValueLoad(g, "callsite_load"); let then_bb = new llvm.BasicBlock("callsite_build", this.llvmFn); let merge_bb = new llvm.BasicBlock("callsite_merge", this.llvmFn); - let from_bb = ir.getInsertBlock(); + const from_bb = ir.getInsertBlock()!; let isnum = this.v.isNumber(loaded); ir.createCondBr(isnum, then_bb, merge_bb); ir.setInsertPoint(then_bb); this.call(rt.gc_add_root, [g], ""); - let mkarr = (strs, name) => { - let vals = strs.map((s) => this.v.getAtom(String(s))); - let argv; + const mkarr = (strs: readonly string[], name: string) => { + const vals = strs.map((s) => this.v.getAtom(String(s))); + let argv: import("@llvm").Value; if (vals.length > 0) argv = this.spillArgs(vals); else argv = ir.createPointerCast(this.this_slot, types.EjsValue.pointerTo(), "noargs"); return this.call(rt.array_new_copy, [consts.int64(vals.length), argv], name); @@ -839,7 +884,7 @@ export class EIREmitter { this.call(rt.object_setprop, [cooked, this.v.getAtom("raw"), frozen_raw], ""); let frozen = this.call(rt.object_freeze, [cooked], "frozen_cooked"); ir.createStore(frozen, g); - let built_bb = ir.getInsertBlock(); + const built_bb = ir.getInsertBlock()!; ir.createBr(merge_bb); ir.setInsertPoint(merge_bb); @@ -850,8 +895,8 @@ export class EIREmitter { return; } case "make_regexp": { - let source = consts.string(ir, inst.imms.source); - let flags = consts.string(ir, inst.imms.flags); + let source = consts.string(ir, (inst.imms["source"] as string)); + let flags = consts.string(ir, (inst.imms["flags"] as string)); return this.emitCallLike(inst, rt.regexp_new_utf8, [source, flags], "regexp"); } @@ -860,7 +905,7 @@ export class EIREmitter { // : array_new_copy(0, args) // (count of zero never dereferences the pointer, so the // select keeps this branch-free) - let index = inst.imms.index; + let index = (inst.imms["index"] as number); let has_rest = ir.createICmpSGt(this.fn_argc, consts.int32(index), "has_rest"); let count = ir.createNswSub(this.fn_argc, consts.int32(index), "rest_count"); count = ir.createSelect(has_rest, count, consts.int32(0), "rest_count_sel"); @@ -914,11 +959,11 @@ export class EIREmitter { case "call_runtime": { // a direct call to a named entry in the runtime method table - let callee = rt[inst.imms.name]; - if (!callee) - throw new Error(`EIR emit: no runtime function '${inst.imms.name}'`); + const rtName = String(inst.imms["name"]); + const callee = (rt as unknown as Record)[rtName]; + if (!callee) throw new Error(`EIR emit: no runtime function '${rtName}'`); let argv = inst.operands.map((o) => this.val(o)); - if (inst.imms.void) { + if ((inst.imms["void"] as boolean | undefined)) { // void results can't be named (LLVM) or read as values. // materialize the placeholder BEFORE the call: an // invoke (in a protected region) terminates the block. @@ -943,9 +988,9 @@ export class EIREmitter { "binres" ); } - let unop = unop_for_op[inst.op]; + const unop = unop_for_op[inst.op]; if (unop) { - let callee = this.v.ejs_runtime[`unop${unop}`]; + const callee = (this.v.ejs_runtime as unknown as Record)[`unop${unop}`]; if (!callee) throw new Error(`EIR emit: no unop interface for ${unop}`); return this.emitCallLike(inst, callee, [this.val(inst.operands[0])], "unres"); } diff --git a/lib/llvm.d.ts b/lib/llvm.d.ts index 7c1a7edc..98be261b 100644 --- a/lib/llvm.d.ts +++ b/lib/llvm.d.ts @@ -92,7 +92,7 @@ declare module "@llvm" { setStructRet(): void; hasStructRetAttr(): boolean; setGC(name: string): void; - setPersonality(fn: EjsFunction): void; + setPersonality(fn: Value): void; // compiler bookkeeping doesNotThrow?: boolean; doesNotAccessMemory?: boolean; @@ -100,6 +100,11 @@ declare module "@llvm" { returns_ejsval_bool?: boolean; takes_builtins?: boolean; entry_bb?: BasicBlock; + literalAllocas?: Record; + topScope?: Map; + bits_alloca?: AllocaInst; + debug_info?: DISubprogram; + hasPersonality(): boolean; } interface BasicBlock { @@ -203,7 +208,7 @@ declare module "@llvm" { createICmpSGt(l: Value, r: Value, name: string): Value; createICmpUGt(l: Value, r: Value, name: string): Value; createICmpULt(l: Value, r: Value, name: string): Value; - createLandingPad(type: Type, personality: Value, numClauses: number, name: string): LandingPad; + createLandingPad(type: Type, numClauses: number, name: string): LandingPad; createLoad(type: Type, ptr: Value, name: string): Value; createNswSub(l: Value, r: Value, name: string): Value; createOr(l: Value, r: Value, name: string): Value; From 5b8ff94747703f0d6e0be9dc936cac68ead24fb0 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 19:24:17 -0700 Subject: [PATCH 066/146] =?UTF-8?q?ts:=20compiler=20=E2=80=94=20the=20modu?= =?UTF-8?q?le=20scaffolding,=20implementing=20VisitorSurface?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit LLVMIRVisitor formally implements the VisitorSurface contract the EIR emitter consumes; its two dozen state fields (module globals, literal initialization machinery, the deferred EIR-toplevel entry branch) are declared. compile()'s flow types end to end: Program in, llvm.Module out, CollectResult errors thrown as compile errors. The historical dynamic-property alloca cache on llvm functions is preserved behind a single documented cast, and insert_toplevel_func's synthetic node now satisfies the FunctionDeclaration interface. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/{compiler.js => compiler.ts} | 243 +++++++++++++++++++------------ lib/llvm.d.ts | 5 +- 2 files changed, 155 insertions(+), 93 deletions(-) rename lib/{compiler.js => compiler.ts} (73%) diff --git a/lib/compiler.js b/lib/compiler.ts similarity index 73% rename from lib/compiler.js rename to lib/compiler.ts index 7713e2d6..5c0a5a1b 100644 --- a/lib/compiler.js +++ b/lib/compiler.ts @@ -1,10 +1,9 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ import * as llvm from "@llvm"; - import { preEIRConvert as pre_eir_convert } from "./desugar"; import * as types from "./types"; import * as consts from "./consts"; @@ -17,14 +16,66 @@ import { startGenerator } from "./echo-util"; import { ABI } from "./abi"; import { SRetABI } from "./sret-abi"; import { collectEIRToplevel } from "./eir/integrate"; -import { EIREmitter } from "./eir/emit"; - -let ir = llvm.IRBuilder; - -let hasOwn = Object.prototype.hasOwnProperty; - -class LLVMIRVisitor { - constructor(module, filename, triple, options, abi, allModules, this_module_info, dibuilder, difile) { +import type { ModuleAccessor } from "./eir/integrate"; +import { EIREmitter, VisitorSurface } from "./eir/emit"; +import type * as e from "./estree"; +import type { CompilerOptions } from "./options"; +import type { ModuleInfo, JSModuleInfo } from "./module-info"; +import type { Triple } from "./triple"; +import type { RuntimeInterface } from "./runtime"; + +const ir = llvm.IRBuilder; + +const hasOwn = Object.prototype.hasOwnProperty; + +// the state emitModuleInfo/emitModuleResolution thread between them +class LLVMIRVisitor implements VisitorSurface { + module: llvm.Module; + filename: string; + triple: Triple; + options: CompilerOptions; + abi: ABI; + allModules: Map; + this_module_info: JSModuleInfo; + dibuilder: llvm.DIBuilder | undefined; + difile: llvm.DIFile | undefined; + idgen: () => number; + genRecordId?: () => number; + llvm_intrinsics: { gcroot: () => llvm.EjsFunction }; + ejs_runtime: RuntimeInterface; + ejs_binops: Record; + ejs_atoms: Record; + ejs_globals: Record; + ejs_symbols: Record; + module_atoms: Map; + literalInitializationFunction: llvm.EjsFunction; + literalInitializationDebugInfo: llvm.DISubprogram | undefined; + literalInitializationBB: llvm.BasicBlock; + currentFunction: llvm.EjsFunction | null = null; + // module scaffolding state (set by emitModuleInfo / emitEIRToplevel) + this_module_global!: llvm.GlobalVariable; + this_module_type!: llvm.StructType; + this_module_initted!: llvm.GlobalVariable; + import_module_globals!: Map; + resolve_modules_bb!: llvm.BasicBlock; + toplevel_body_bb!: llvm.BasicBlock; + toplevel_function!: llvm.EjsFunction; + eir_toplevel_entry_bb: llvm.BasicBlock | null = null; + eir_emitter?: EIREmitter; + eir_emitted?: Map>; + eir_toplevel_fns!: Map; + + constructor( + module: llvm.Module, + filename: string, + triple: Triple, + options: CompilerOptions, + abi: ABI, + allModules: Map, + this_module_info: JSModuleInfo, + dibuilder: llvm.DIBuilder | undefined, + difile: llvm.DIFile | undefined + ) { this.module = module; this.filename = filename; this.triple = triple; @@ -51,7 +102,7 @@ class LLVMIRVisitor { this.module_atoms = new Map(); - let init_function_name = `_ejs_module_init_string_literals_${this.filename}`; + const init_function_name = `_ejs_module_init_string_literals_${this.filename}`; this.literalInitializationFunction = this.module.getOrInsertFunction( init_function_name, types.Void, @@ -59,11 +110,11 @@ class LLVMIRVisitor { ); if (this.options.debug) - this.literalInitializationDebugInfo = this.dibuilder.createFunction( - this.difile, + this.literalInitializationDebugInfo = this.dibuilder!.createFunction( + this.difile!, init_function_name, init_function_name, - this.difile, + this.difile!, 0, false, true, @@ -82,7 +133,7 @@ class LLVMIRVisitor { if (this.options.debug) ir.setCurrentDebugLocation( - llvm.DebugLoc.get(0, 0, this.literalInitializationDebugInfo) + llvm.DebugLoc.get(0, 0, this.literalInitializationDebugInfo!) ); this.doInsideBBlock(entry_bb, () => { @@ -98,7 +149,7 @@ class LLVMIRVisitor { // lots of helper methods - emitModuleInfo() { + emitModuleInfo(): void { this.this_module_type = types.getModuleSpecificType( this.this_module_info.module_name, this.this_module_info.slot_num @@ -113,7 +164,7 @@ class LLVMIRVisitor { ); this.import_module_globals = new Map(); for (let import_module_string of this.this_module_info.importList) { - let import_module_info = this.allModules.get(import_module_string); + const import_module_info = this.allModules.get(import_module_string)!; if (!import_module_info.isNative()) this.import_module_globals.set( import_module_string, @@ -135,13 +186,13 @@ class LLVMIRVisitor { ); } - emitModuleResolution(module_accessors) { + emitModuleResolution(module_accessors: ModuleAccessor[]): llvm.Value { // this.loadUndefinedEjsValue depends on this this.currentFunction = this.toplevel_function; ir.setInsertPoint(this.resolve_modules_bb); if (this.options.debug) - ir.setCurrentDebugLocation(llvm.DebugLoc.get(0, 0, this.currentFunction.debug_info)); + ir.setCurrentDebugLocation(llvm.DebugLoc.get(0, 0, this.currentFunction!.debug_info!)); let uninitialized_bb = new llvm.BasicBlock("module_uninitialized", this.toplevel_function); let initialized_bb = new llvm.BasicBlock("module_initialized", this.toplevel_function); @@ -205,12 +256,7 @@ class LLVMIRVisitor { for (let import_module_string of this.this_module_info.importList) { let import_module = this.import_module_globals.get(import_module_string); if (import_module) { - this.createCall( - this.ejs_runtime.module_resolve, - [import_module], - "", - !this.ejs_runtime.module_resolve.doesNotThrow - ); + this.createCall(this.ejs_runtime.module_resolve, [import_module], ""); } } @@ -231,38 +277,40 @@ class LLVMIRVisitor { } // result should be the landingpad's value - doInsideBBlock(b, f) { - let saved = ir.getInsertBlock(); - ir.setInsertPoint(b); + doInsideBBlock(bb: llvm.BasicBlock, f: () => void): void { + const saved = ir.getInsertBlock(); + ir.setInsertPoint(bb); f(); ir.setInsertPoint(saved); - return b; } - createEjsValueLoad(value, name) { - let rv = ir.createLoad(types.EjsValue, value, name); + createEjsValueLoad(value: llvm.Value, name: string): llvm.Value { + const rv = ir.createLoad(types.EjsValue, value, name) as llvm.AllocaInst; rv.setAlignment(8); return rv; } - loadCachedEjsValue(name, init) { + loadCachedEjsValue(name: string, init: (alloca: llvm.AllocaInst) => void): llvm.Value { let alloca_name = `${name}_alloca`; let load_name = `${name}_load`; - let alloca; - if (this.currentFunction[alloca_name]) { - alloca = this.currentFunction[alloca_name]; - } else { - alloca = this.createAlloca(this.currentFunction, types.EjsValue, alloca_name); - this.currentFunction[alloca_name] = alloca; - this.doInsideBBlock(this.currentFunction.entry_bb, () => init(alloca)); + // per-function alloca cache, dynamic-keyed on the llvm function + // (matching the historical direct-property scheme) + const fn = this.currentFunction!; + const cache = fn as unknown as Record; + let alloca = cache[alloca_name]; + if (!alloca) { + const fresh = this.createAlloca(fn, types.EjsValue, alloca_name); + cache[alloca_name] = fresh; + this.doInsideBBlock(fn.entry_bb!, () => init(fresh)); + alloca = fresh; } return ir.createLoad(types.EjsValue, alloca, load_name); } - loadBoolEjsValue(n) { - let rv = this.loadCachedEjsValue(n, (alloca) => { + loadBoolEjsValue(n: boolean): llvm.Value { + const rv = this.loadCachedEjsValue(String(n), (alloca) => { let alloca_as_int64 = ir.createBitCast( alloca, types.Int64.pointerTo(), @@ -283,17 +331,17 @@ class LLVMIRVisitor { return rv; } - loadDoubleEjsValue(n) { + loadDoubleEjsValue(n: number): llvm.Value { return this.loadCachedEjsValue(`num_${n}`, (alloca) => this.storeDouble(alloca, n)); } - loadNullEjsValue() { + loadNullEjsValue(): llvm.Value { return this.loadCachedEjsValue("null", (alloca) => this.storeNull(alloca)); } - loadUndefinedEjsValue() { + loadUndefinedEjsValue(): llvm.Value { return this.loadCachedEjsValue("undef", (alloca) => this.storeUndefined(alloca)); } - storeUndefined(alloca, name) { + storeUndefined(alloca: llvm.AllocaInst, name?: string): llvm.Value { let alloca_as_int64 = ir.createBitCast( alloca, types.Int64.pointerTo(), @@ -314,7 +362,7 @@ class LLVMIRVisitor { ); } - storeNull(alloca, name) { + storeNull(alloca: llvm.AllocaInst, name?: string): llvm.Value { let alloca_as_int64 = ir.createBitCast( alloca, types.Int64.pointerTo(), @@ -335,7 +383,7 @@ class LLVMIRVisitor { ); } - storeDouble(alloca, jsnum, name) { + storeDouble(alloca: llvm.AllocaInst, jsnum: number, name?: string): llvm.Value { let c = llvm.ConstantFP.getDouble(jsnum); let alloca_as_double = ir.createBitCast( alloca, @@ -345,9 +393,9 @@ class LLVMIRVisitor { return ir.createStore(c, alloca_as_double, name); } - createAlloca(func, type, name) { + createAlloca(func: llvm.EjsFunction, type: llvm.Type, name: string): llvm.AllocaInst { let saved_insert_point = ir.getInsertBlock(); - ir.setInsertPointStartBB(func.entry_bb); + ir.setInsertPointStartBB(func.entry_bb!); let alloca = ir.createAlloca(type, name); // if EjsValue was a pointer value we would be able to use an the llvm gcroot intrinsic here. but with the nan boxing @@ -360,22 +408,22 @@ class LLVMIRVisitor { return alloca; } - emitEIRToplevel(n) { + emitEIRToplevel(n: e.FunctionDeclaration): llvm.EjsFunction { let insertBlock = ir.getInsertBlock(); if (!this.eir_emitter) this.eir_emitter = new EIREmitter(this); if (!this.eir_emitted) this.eir_emitted = new Map(); - let eir_fns = this.eir_emitted.get(n.eir_module); + let eir_fns = this.eir_emitted.get(n.eir_module!); if (!eir_fns) { - eir_fns = this.eir_emitter.emitModule(n.eir_module); - this.eir_emitted.set(n.eir_module, eir_fns); + eir_fns = this.eir_emitter.emitModule(n.eir_module!); + this.eir_emitted.set(n.eir_module!, eir_fns); } // export accessors resolve by name against this map (see // emitModuleResolution) this.eir_toplevel_fns = eir_fns; - let target = eir_fns.get(n.eir_main); + const target = eir_fns.get(n.eir_main!)!; - let ir_func = n.ir_func; + const ir_func = n.ir_func!; this.currentFunction = ir_func; let entry_bb = new llvm.BasicBlock("entry", ir_func); ir_func.entry_bb = entry_bb; // cached-literal helpers want this @@ -389,7 +437,7 @@ class LLVMIRVisitor { ir_func, target.type, target, - [args[0], args[1], args[2], args[3], args[4]], + [args[0]!, args[1]!, args[2]!, args[3]!, args[4]!], "eir_toplevel_result" ); this.abi.createRet(ir_func, rv); @@ -412,12 +460,12 @@ class LLVMIRVisitor { // function's body with a forwarding call. closure creation and env // plumbing stay entirely on the legacy side; the thunk just hands the // builtin arguments through. - createRet(x) { + createRet(x: llvm.Value): llvm.Value { //this.createCall this.ejs_runtime.log, [consts.string(ir, `leaving ${this.currentFunction.name}`)], '' - return this.abi.createRet(this.currentFunction, x); + return this.abi.createRet(this.currentFunction!, x); } - generateUCS2(id, jsstr) { + generateUCS2(id: number, jsstr: string): llvm.GlobalVariable { let ucsArrayType = llvm.ArrayType.get(types.JSChar, jsstr.length + 1); let array_data = []; for (let i = 0, e = jsstr.length; i < e; i++) @@ -435,7 +483,7 @@ class LLVMIRVisitor { return arrayglobal; } - generateEJSPrimString(id) { + generateEJSPrimString(id: number, _len?: number): llvm.GlobalVariable { let strglobal = new llvm.GlobalVariable( this.module, types.EjsPrimString, @@ -447,7 +495,7 @@ class LLVMIRVisitor { return strglobal; } - generateEJSValueForString(id) { + generateEJSValueForString(id: number | string): llvm.GlobalVariable { let name = `ejsval-${id}`; let strglobal = new llvm.GlobalVariable( this.module, @@ -462,7 +510,13 @@ class LLVMIRVisitor { return val; } - addStringLiteralInitialization(name, ucs2, primstr, val, len) { + addStringLiteralInitialization( + name: string, + ucs2: llvm.GlobalVariable, + primstr: llvm.GlobalVariable, + val: llvm.GlobalVariable, + len: number + ): void { let saved_insert_point = ir.getInsertBlock(); ir.setInsertPointStartBB(this.literalInitializationBB); @@ -471,7 +525,7 @@ class LLVMIRVisitor { if (this.options.debug) { saved_debug_loc = ir.getCurrentDebugLocation(); ir.setCurrentDebugLocation( - llvm.DebugLoc.get(0, 0, this.literalInitializationDebugInfo) + llvm.DebugLoc.get(0, 0, this.literalInitializationDebugInfo!) ); } @@ -494,13 +548,13 @@ class LLVMIRVisitor { "" ); ir.setInsertPoint(saved_insert_point); - if (this.options.debug) ir.setCurrentDebugLocation(saved_debug_loc); + if (this.options.debug) ir.setCurrentDebugLocation(saved_debug_loc!); } - getAtom(str) { + getAtom(str: string): llvm.Value { // check if it's an atom (a runtime library constant) first of all if (hasOwn.call(this.ejs_atoms, str)) - return this.createEjsValueLoad(this.ejs_atoms[str], `${str}_atom_load`); + return this.createEjsValueLoad(this.ejs_atoms[str]!, `${str}_atom_load`); // if it's not, we create a constant and embed it in this module if (!this.module_atoms.has(str)) { @@ -512,20 +566,20 @@ class LLVMIRVisitor { this.addStringLiteralInitialization(str, ucs2_data, primstring, ejsval, str.length); } - return this.createEjsValueLoad(this.module_atoms.get(str), "literal_load"); + return this.createEjsValueLoad(this.module_atoms.get(str)!, "literal_load"); } - createCall(callee, argv, callname) { + createCall(callee: llvm.EjsFunction, argv: llvm.Value[], callname: string): llvm.Value { // the module scaffolding this visitor still emits never runs // inside a protected region; EIR-emitted code manages its own // invoke/landingpad pairs (see eir/emit.js) - return this.abi.createCall(this.currentFunction, callee.type, callee, argv, callname); + return this.abi.createCall(this.currentFunction!, callee.type, callee, argv, callname); } - emitEjsvalFromPtr(ptr, prefix) { + emitEjsvalFromPtr(ptr: llvm.Value, prefix: string): llvm.Value { if (this.triple.pointerSize() === 64) { let fromptr_alloca = this.createAlloca( - this.currentFunction, + this.currentFunction!, types.EjsValue, `${prefix}_ejsval` ); @@ -547,22 +601,20 @@ class LLVMIRVisitor { } } - getEjsvalBits(arg) { - let bits_alloca; - - if (this.currentFunction.bits_alloca) bits_alloca = this.currentFunction.bits_alloca; - else bits_alloca = this.createAlloca(this.currentFunction, types.EjsValue, "bits_alloca"); + getEjsvalBits(arg: llvm.Value): llvm.Value { + const fn = this.currentFunction!; + const bits_alloca = fn.bits_alloca ?? this.createAlloca(fn, types.EjsValue, "bits_alloca"); ir.createStore(arg, bits_alloca); - let bits_ptr = ir.createBitCast(bits_alloca, types.Int64.pointerTo(), "bits_ptr"); - if (!this.currentFunction.bits_alloca) this.currentFunction.bits_alloca = bits_alloca; + const bits_ptr = ir.createBitCast(bits_alloca, types.Int64.pointerTo(), "bits_ptr"); + if (!fn.bits_alloca) fn.bits_alloca = bits_alloca; return ir.createLoad(types.Int64, bits_ptr, "bits_load"); } - createEjsvalICmpULt(arg, i64_const, name) { + createEjsvalICmpULt(arg: llvm.Value, i64_const: llvm.Constant, name: string): llvm.Value { return ir.createICmpULt(this.getEjsvalBits(arg), i64_const, name); } - isNumber(val) { + isNumber(val: llvm.Value): llvm.Value { if (this.triple.pointerSize() === 64) { return this.createEjsvalICmpULt( val, @@ -576,7 +628,7 @@ class LLVMIRVisitor { } } -function insert_toplevel_func(tree, moduleInfo) { +function insert_toplevel_func(tree: e.Program, moduleInfo: JSModuleInfo): e.Program { let toplevel = { type: b.FunctionDeclaration, id: b.identifier(moduleInfo.toplevel_function_name), @@ -594,6 +646,8 @@ function insert_toplevel_func(tree, moduleInfo) { }, }, toplevel: true, + generator: false, + expression: false, loc: { start: { line: 0, @@ -606,7 +660,14 @@ function insert_toplevel_func(tree, moduleInfo) { return tree; } -export function compile(tree, base_output_filename, source_filename, module_infos, options, triple) { +export function compile( + tree: e.Program, + base_output_filename: string, + source_filename: string, + module_infos: Map, + options: CompilerOptions, + triple: Triple +): llvm.Module { let abi = triple.abi(); types.initTypes(triple.pointerSize() === 32); @@ -617,7 +678,7 @@ export function compile(tree, base_output_filename, source_filename, module_info module_filename = module_filename.substring(0, module_filename.length - 3); } - let this_module_info = module_infos.get(module_filename); + const this_module_info = module_infos.get(module_filename) as JSModuleInfo; tree = insert_toplevel_func(tree, this_module_info); @@ -630,17 +691,17 @@ export function compile(tree, base_output_filename, source_filename, module_info let lowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); if (lowered.error) throw new Error(`${source_filename}: ${lowered.error}`); - let toplevel_node = tree.body[0]; - let toplevel_name = toplevel_node.id.name; + const toplevel_node = tree.body[0] as e.FunctionDeclaration; + const toplevel_name = toplevel_node.id.name; let module = new llvm.Module(base_output_filename); module.setTriple(triple.llvmTriple()); module.setDataLayout(triple.dataLayout()); - module.toplevel_name = toplevel_name; + (module as unknown as { toplevel_name: string }).toplevel_name = toplevel_name; - let dibuilder; - let difile; + let dibuilder: llvm.DIBuilder | undefined; + let difile: llvm.DIFile | undefined; if (options.debug) { dibuilder = new llvm.DIBuilder(module); @@ -687,13 +748,13 @@ export function compile(tree, base_output_filename, source_filename, module_info difile ); - if (options.debug) dibuilder.finalize(); + if (options.debug) dibuilder!.finalize(); visitor.emitModuleInfo(); visitor.emitEIRToplevel(toplevel_node); - visitor.emitModuleResolution(lowered.accessors); + visitor.emitModuleResolution(lowered.accessors!); return module; } diff --git a/lib/llvm.d.ts b/lib/llvm.d.ts index 98be261b..8eaca4d5 100644 --- a/lib/llvm.d.ts +++ b/lib/llvm.d.ts @@ -18,6 +18,9 @@ declare module "@llvm" { interface Value { setName(name: string): void; dump(): void; + // compiler bookkeeping: values that hold the runtime's boxed-bool + // encoding (see loadBoolEjsValue / forwardCalleeAttributes) + _ejs_returns_ejsval_bool?: boolean; // compiler bookkeeping: constant tracking (see consts.ts) is_constant?: boolean; constant_val?: string | number | boolean | number[] | null; @@ -152,8 +155,6 @@ declare module "@llvm" { setDoesNotAccessMemory(): void; setDoesNotThrow(): void; setStructRet(): void; - // compiler bookkeeping (see ABI.forwardCalleeAttributes) - _ejs_returns_ejsval_bool?: boolean; } interface InvokeInst extends CallInst {} From 5530b8a01228ea0bd3c5aaa64aed6f65dcd8624b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 19:28:18 -0700 Subject: [PATCH 067/146] ts: track the vendored-dependency declarations in the parent repo MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit external-deps/esprima and /escodegen are git submodules, so the .d.ts files placed beside their .js were invisible to this repo (working-tree only — a fresh clone would lose them and every strict build with them). Canonical copies now live in external-deps/typings/, tracked here; the tsjs staging step maps -es6.d.ts next to /-es6.js in the sandbox. The untracked in-submodule siblings remain as an editor/manual-tsc convenience, documented in the canonical headers. Co-Authored-By: Claude Fable 5 --- external-deps/BUCK | 3 +-- external-deps/typings/escodegen-es6.d.ts | 11 +++++++++++ external-deps/typings/esprima-es6.d.ts | 18 ++++++++++++++++++ lib/buck-gen-tsjs.sh | 15 +++++++++------ 4 files changed, 39 insertions(+), 8 deletions(-) create mode 100644 external-deps/typings/escodegen-es6.d.ts create mode 100644 external-deps/typings/esprima-es6.d.ts diff --git a/external-deps/BUCK b/external-deps/BUCK index 84b08538..6e65fbdc 100644 --- a/external-deps/BUCK +++ b/external-deps/BUCK @@ -92,12 +92,11 @@ filegroup( name = "compiler-js", srcs = glob([ "esprima/esprima-es6.js", - "esprima/esprima-es6.d.ts", "escodegen/escodegen-es6.js", - "escodegen/escodegen-es6.d.ts", "estraverse/estraverse-es6.js", "esutils/esutils-es6.js", "esutils/lib/*.js", + "typings/*.d.ts", ]), visibility = ["PUBLIC"], ) diff --git a/external-deps/typings/escodegen-es6.d.ts b/external-deps/typings/escodegen-es6.d.ts new file mode 100644 index 00000000..87ee0968 --- /dev/null +++ b/external-deps/typings/escodegen-es6.d.ts @@ -0,0 +1,11 @@ +// CANONICAL COPY — external-deps/esprima and /escodegen are git +// submodules, so declaration files placed next to their .js are not +// tracked by this repo. The build (lib/buck-gen-tsjs.sh) stages this +// file next to the vendored .js; for editor/manual-tsc use, keep the +// untracked sibling copy in sync (cp external-deps/typings/*.d.ts into +// the matching submodule directory). +// hand-written surface declaration for the vendored escodegen build; +// only what the compiler uses. +import type { Node } from "../../lib/estree"; + +export function generate(node: Node): string; diff --git a/external-deps/typings/esprima-es6.d.ts b/external-deps/typings/esprima-es6.d.ts new file mode 100644 index 00000000..e40a03d2 --- /dev/null +++ b/external-deps/typings/esprima-es6.d.ts @@ -0,0 +1,18 @@ +// CANONICAL COPY — external-deps/esprima and /escodegen are git +// submodules, so declaration files placed next to their .js are not +// tracked by this repo. The build (lib/buck-gen-tsjs.sh) stages this +// file next to the vendored .js; for editor/manual-tsc use, keep the +// untracked sibling copy in sync (cp external-deps/typings/*.d.ts into +// the matching submodule directory). +// hand-written surface declaration for the vendored esprima fork; only +// what the compiler uses. +import type { Program } from "../../lib/estree"; + +export interface ParseOptions { + loc?: boolean; + raw?: boolean; + tolerant?: boolean; + sourceType?: "script" | "module"; +} + +export function parse(source: string, options?: ParseOptions): Program; diff --git a/lib/buck-gen-tsjs.sh b/lib/buck-gen-tsjs.sh index 9a0a4fa2..6512bb98 100644 --- a/lib/buck-gen-tsjs.sh +++ b/lib/buck-gen-tsjs.sh @@ -39,12 +39,15 @@ done # hand-written surface declarations for the vendored external-deps JS # (relative imports like ../../external-deps/escodegen/escodegen-es6 -# typecheck against these; the .js resolves at runtime) -if [ -d compiler-js ]; then - (cd compiler-js && find . -name "*.d.ts" | while read -r f; do - mkdir -p "$STAGE/external-deps/$(dirname "$f")" - cp "$f" "$STAGE/external-deps/$f" - done) +# typecheck against these; the .js resolves at runtime). the canonical +# copies live in external-deps/typings (the vendored dirs are git +# submodules); each -es6.d.ts stages next to /-es6.js +if [ -d compiler-js/typings ]; then + for f in compiler-js/typings/*-es6.d.ts; do + base=$(basename "$f" -es6.d.ts) + mkdir -p "$STAGE/external-deps/$base" + cp "$f" "$STAGE/external-deps/$base/$base-es6.d.ts" + done fi # copy the .js files through From 5d387b30b6ae7c262378e07b9359381cc4833c16 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 19:36:43 -0700 Subject: [PATCH 068/146] =?UTF-8?q?ts:=20the=20driver=20(ejs-es6)=20?= =?UTF-8?q?=E2=80=94=20and=20the=20--target=20presets=20were=20broken?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The argument table becomes Record with flag/option keys constrained to CompilerOptions members; llvm tool names are a literal-keyed const; the spawn pipelines and link-argument assembly type through node's child_process surface. lib/host-config.d.ts declares the generated host-config module. The port caught a real one: set_target's platform presets constructed Triple with positional arguments ("x86_64", "unknown", "linux") but the constructor has taken an options object for as long as this tree has history — every --target preset produced a Triple of undefineds. Now they construct properly. The root export_file had to rename to //:ejs-es6.ts — export_file renames its output to the target name, so keeping the old name handed the tsjs stage raw TypeScript labeled as .js. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- BUCK | 2 +- ejs-es6.js => ejs-es6.ts | 187 +++++++++++++++++++++++---------------- lib/BUCK | 2 +- lib/host-config.d.ts | 4 + 4 files changed, 118 insertions(+), 77 deletions(-) rename ejs-es6.js => ejs-es6.ts (80%) mode change 100755 => 100644 create mode 100644 lib/host-config.d.ts diff --git a/BUCK b/BUCK index 3b43d8b0..3d02af3c 100644 --- a/BUCK +++ b/BUCK @@ -17,7 +17,7 @@ platform( ) export_file( - name = "ejs-es6.js", + name = "ejs-es6.ts", visibility = ["PUBLIC"], ) diff --git a/ejs-es6.js b/ejs-es6.ts old mode 100755 new mode 100644 similarity index 80% rename from ejs-es6.js rename to ejs-es6.ts index 4b12f311..1c730fb6 --- a/ejs-es6.js +++ b/ejs-es6.ts @@ -1,7 +1,15 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + import * as os from "@node-compat/os"; import * as path from "@node-compat/path"; import * as fs from "@node-compat/fs"; import * as child_process from "@node-compat/child_process"; +import type { CompilerOptions } from "./lib/options"; +import type { Triple as TripleT } from "./lib/triple"; +import type { ModuleInfo, JSModuleInfo, NativeModuleInfo } from "./lib/module-info"; +import type { Program } from "./lib/estree"; import * as debug from "./lib/debug"; import { compile } from "./lib/compiler"; @@ -15,13 +23,16 @@ import { RUNLOOP_IMPL as DEFAULT_RUNLOOP_IMPL, } from "./lib/host-config"; -let spawn = child_process.spawn; +const spawn = child_process.spawn; + +// the self-hosted runtime exposes a global marker object +declare const __ejs: object | undefined; -function isNode() { +function isNode(): boolean { return typeof __ejs == "undefined"; } -let argv; +let argv: string[]; if (!isNode()) { // argv is ['.../ejs', ...], get rid of the first arg argv = process.argv.slice(1); @@ -30,13 +41,13 @@ if (!isNode()) { argv = process.argv.slice(2); } -let ejs_dirname; -function ejs_exe_dirname() { +let ejs_dirname: string | undefined; +function ejs_exe_dirname(): string { if (ejs_dirname) return ejs_dirname; - let argv0 = process.argv[isNode() ? 1 : 0]; + const argv0 = process.argv[isNode() ? 1 : 0]!; let cwd = process.cwd(); - let full_path_to_exe; + let full_path_to_exe: string | undefined; if (argv0.indexOf("/") != -1) { // either relative or absolute. don't both searching path. let ejs_path = path.resolve(cwd, argv0); @@ -49,7 +60,7 @@ function ejs_exe_dirname() { } } else { // not qualified at all, search over PATH - for (let p of process.env.PATH.split(":")) { + for (const p of (process.env["PATH"] || "").split(":")) { let ejs_path = path.resolve(cwd, p, argv0); try { if (fs.statSync(ejs_path).isFile()) { @@ -69,27 +80,26 @@ function ejs_exe_dirname() { return ejs_dirname; } -function relative_to_ejs_exe(n) { - let was_array = Array.isArray(n); - if (!was_array) n = [n]; +function relative_to_ejs_exe(n: string): string; +function relative_to_ejs_exe(n: string[]): string[]; +function relative_to_ejs_exe(n: string | string[]): string | string[] { + const was_array = Array.isArray(n); + const list = was_array ? n : [n]; - let rv; - if (isNode()) { - rv = n.map((el) => path.resolve(ejs_exe_dirname(), "../..", el)); - } else { - rv = n.map((el) => path.resolve(ejs_exe_dirname(), el)); - } + const rv = isNode() + ? list.map((el) => path.resolve(ejs_exe_dirname(), "../..", el)) + : list.map((el) => path.resolve(ejs_exe_dirname(), el)); if (was_array) return rv; - return rv[0]; + return rv[0]!; } -let temp_files = []; +const temp_files: string[] = []; -let host_triple = Triple.fromProcess(); +const host_triple = Triple.fromProcess(); let target_triple = host_triple; // a reasonable default. we're compiling for _this_ triple. -let options = { +const options: CompilerOptions = { // our defaults: opt_level: 2, debug: false, @@ -111,24 +121,24 @@ let options = { stdout_writer: new Writer(process.stdout), }; -function add_native_module_dir(dir) { +function add_native_module_dir(dir: string): void { options.native_module_dirs.push(dir); } -function set_target(str) { - let triple; +function set_target(str: string): void { + let triple: TripleT; switch (str) { case "linux_x86_64": - triple = new Triple("x86_64", "unknown", "linux"); + triple = new Triple({ arch: "x86_64", vendor: "unknown", os: "linux" }); break; case "macos": - triple = new Triple("arm64", "apple", "macos"); + triple = new Triple({ arch: "arm64", vendor: "apple", os: "macos" }); break; case "iossim": - triple = new Triple("arm64", "apple", "ios", "simulator"); + triple = new Triple({ arch: "arm64", vendor: "apple", os: "ios", env: "simulator" }); break; case "iosdev": - triple = new Triple("arm64", "apple", "ios"); + triple = new Triple({ arch: "arm64", vendor: "apple", os: "ios" }); break; default: triple = Triple.fromString(str); @@ -137,19 +147,19 @@ function set_target(str) { target_triple = triple; } -function set_extra_clang_args(arginfo) { +function set_extra_clang_args(arginfo: string): void { options.extra_clang_args = arginfo; } -function increase_debug_level() { +function increase_debug_level(): void { options.debug_level += 1; } -function add_debug_after_pass(passname) { +function add_debug_after_pass(passname: string): void { options.debug_passes.add(passname); } -function add_import_variable(arg) { +function add_import_variable(arg: string): void { let equal_idx = arg.indexOf("="); if (equal_idx == -1) throw new Error("-I flag requires ="); @@ -159,7 +169,17 @@ function add_import_variable(arg) { }); } -let args = { +interface ArgSpec { + // sets options[flag] = true + flag?: keyof CompilerOptions & string; + // consumes one argument into options[option] + option?: keyof CompilerOptions & string; + handler?: (...args: string[]) => void; + handlerArgc?: number; + help: string; +} + +const args: Record = { "-O0": { handler: () => (options.opt_level = 0), help: "Optimization level 0.", @@ -268,24 +288,25 @@ function output_usage() { function output_options() { console.warn("Options:"); - for (let a of Object.keys(args)) { - console.warn(` ${a}: ${args[a].help}`); + for (const a of Object.keys(args)) { + console.warn(` ${a}: ${args[a]!.help}`); } } -let file_args; +let file_args: string[] | undefined; if (argv.length > 0) { for (let ai = 0, ae = argv.length; ai < ae; ai++) { - if (args[argv[ai]]) { - let o = args[argv[ai]]; + const o = args[argv[ai]!]; + if (o) { + const opts = options as unknown as Record; if (o.flag) { - options[o.flag] = true; + opts[o.flag] = true; } else if (o.option) { - options[o.option] = argv[++ai]; + opts[o.option] = argv[++ai]!; } else if (o.handler) { - let handler_args = []; - for (let i = 0, e = o.handlerArgc; i < e; i++) handler_args.push(argv[++ai]); + const handler_args: string[] = []; + for (let i = 0, e = o.handlerArgc ?? 0; i < e; i++) handler_args.push(argv[++ai]!); o.handler.apply(null, handler_args); } } else { @@ -314,9 +335,9 @@ if (!options.quiet) { debug.setLevel(options.debug_level); -let o_filenames = []; +const o_filenames: string[] = []; -let compiled_modules = []; +const compiled_modules: { filename: string; module_toplevel: string }[] = []; let sim_base = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform"; let dev_base = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform"; @@ -324,7 +345,7 @@ let dev_base = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.pl let sim_bin = `${sim_base}/Developer/usr/bin`; let dev_bin = `${dev_base}/Developer/usr/bin`; -function target_llc_args(triple) { +function target_llc_args(triple: TripleT): string[] { let args = [`-march=${triple.llcArch()}`]; switch (triple.os) { case "macos": @@ -345,9 +366,9 @@ function target_llc_args(triple) { return args; } -let target_linker = process.env.CXX || "clang++"; +const target_linker = process.env["CXX"] || "clang++"; -function target_link_args(triple) { +function target_link_args(triple: TripleT): string[] { let args = ["-arch", triple.clangArch()]; if (triple.os === "linux") { @@ -379,7 +400,7 @@ function target_link_args(triple) { return []; } -function target_libraries(triple) { +function target_libraries(triple: TripleT): string[] { if (triple.os === "linux") { if (DEFAULT_RUNLOOP_IMPL == "noop") return ["-lunwind", "-lpthread"]; return ["-lunwind", "-lpthread", "-luv"]; @@ -407,7 +428,7 @@ function target_libraries(triple) { return []; } -function target_libecho(triple) { +function target_libecho(triple: TripleT): string { if (options.srcdir) { return path.join("runtime", "out", `${triple}`, "libecho.a"); } else { @@ -415,7 +436,7 @@ function target_libecho(triple) { } } -function target_extra_libs(triple) { +function target_extra_libs(triple: TripleT): string[] { if (options.srcdir) { if (triple.os === "linux") return [ @@ -452,7 +473,7 @@ function target_extra_libs(triple) { } } -function target_path_prepend(triple) { +function target_path_prepend(triple: TripleT): string { if (triple.os === "ios") { if (triple.env === "simulator") { return sim_bin; @@ -462,11 +483,21 @@ function target_path_prepend(triple) { return ""; } -let llvm_commands = {}; -for (let x of ["opt", "llc", "llvm-as"]) - llvm_commands[x] = `${x}${process.env.LLVM_SUFFIX || DEFAULT_LLVM_SUFFIX}`; - -function compileFile(filename, parse_tree, modules, files_count, cur_file, compileCallback) { +const llvm_suffix = process.env["LLVM_SUFFIX"] || DEFAULT_LLVM_SUFFIX; +const llvm_commands = { + opt: `opt${llvm_suffix}`, + llc: `llc${llvm_suffix}`, + "llvm-as": `llvm-as${llvm_suffix}`, +} as const; + +function compileFile( + filename: string, + parse_tree: Program, + modules: Map, + files_count: number, + cur_file: number, + compileCallback: () => void +): void { let base_filename = genFreshFileName(path.basename(filename)); if (!options.quiet) { @@ -483,7 +514,7 @@ function compileFile(filename, parse_tree, modules, files_count, cur_file, compi ); } - let compiled_module; + let compiled_module: import("@llvm").Module; try { compiled_module = compile( parse_tree, @@ -499,7 +530,7 @@ function compileFile(filename, parse_tree, modules, files_count, cur_file, compi throw e; } - function tmpfile(suffix) { + function tmpfile(suffix: string): string { return `${os.tmpdir()}/${base_filename}-${target_triple.arch}-${target_triple.os}${suffix}`; } let ll_filename = tmpfile(".ll"); @@ -533,8 +564,8 @@ function compileFile(filename, parse_tree, modules, files_count, cur_file, compi // debug.log (1, `done writing ${bc_filename}`); compiled_modules.push({ - filename: options.basename ? path.basename(filename) : filename, - module_toplevel: compiled_module.toplevel_name, + filename: filename, + module_toplevel: (compiled_module as unknown as { toplevel_name: string }).toplevel_name, }); if (!isNode()) { @@ -576,7 +607,10 @@ function compileFile(filename, parse_tree, modules, files_count, cur_file, compi } } -function generate_import_map(js_modules, native_modules) { +function generate_import_map( + js_modules: Map, + native_modules: Map +): string { let map_path = `${os.tmpdir()}/${genFreshFileName(path.basename(main_file))}-import-map.cpp`; let map_contents = ""; @@ -613,11 +647,11 @@ function generate_import_map(js_modules, native_modules) { map_contents += "int _ejs_num_external_modules = sizeof(_ejs_external_modules) / sizeof(_ejs_external_modules[0]);\n"; - let entry_module = file_args[0]; + let entry_module = file_args![0]!; if (entry_module.lastIndexOf(".js") == entry_module.length - 3) entry_module = entry_module.substring(0, entry_module.length - 3); map_contents += `const EJSModule* entry_module = &${ - js_modules.get(entry_module).module_name + js_modules.get(entry_module)!.module_name };\n`; map_contents += "};"; @@ -628,20 +662,20 @@ function generate_import_map(js_modules, native_modules) { return map_path; } -function do_final_link(main_file, modules) { - let js_modules = new Map(); - let native_modules = new Map(); +function do_final_link(main_file: string, modules: Map): void { + const js_modules = new Map(); + const native_modules = new Map(); modules.forEach((m, k) => { if (m.isNative()) { - native_modules.set(k, m); + native_modules.set(k, m as NativeModuleInfo); } else { - js_modules.set(k, m); + js_modules.set(k, m as JSModuleInfo); } }); let map_filename = generate_import_map(js_modules, native_modules); - process.env.PATH = `${target_path_prepend(target_triple)}:${process.env.PATH}`; + process.env["PATH"] = `${target_path_prepend(target_triple)}:${process.env["PATH"]}`; let output_filename = options.output_filename || `${main_file}.exe`; let clang_args = target_link_args(target_triple).concat( @@ -658,7 +692,7 @@ function do_final_link(main_file, modules) { clang_args = clang_args.concat(relative_to_ejs_exe(target_libecho(target_triple))); clang_args = clang_args.concat(relative_to_ejs_exe(target_extra_libs(target_triple))); - let seen_native_modules = new Set(); + const seen_native_modules = new Set(); native_modules.forEach((module) => { // don't include native modules more than once module.module_files.forEach((mf) => { @@ -701,7 +735,7 @@ function do_final_link(main_file, modules) { } } -function cleanup(done) { +function cleanup(done: () => void): void { let files_to_delete = temp_files.length; temp_files.forEach((filename) => { fs.unlink(filename, (/* XXX err*/) => { @@ -711,11 +745,14 @@ function cleanup(done) { }); } -let main_file = file_args[0]; +const main_file = file_args[0]!; if (!options.srcdir) options.native_module_dirs.push(relative_to_ejs_exe("../lib")); let files = gatherAllModules(file_args, options, target_triple); -debug.log(1, () => dumpModules()); +debug.log(1, () => { + dumpModules(); + return ""; +}); let allModules = getAllModules(); // now compile them @@ -723,12 +760,12 @@ let allModules = getAllModules(); // reverse the list so the main program is the first thing we compile files.reverse(); let files_count = files.length; -let compileNextFile = () => { +const compileNextFile = (): void => { if (files.length === 0) { do_final_link(main_file, allModules); return; } - let f = files.pop(); + const f = files.pop()!; compileFile( f.file_name, f.file_ast, diff --git a/lib/BUCK b/lib/BUCK index 889d2ea9..dc3fd4db 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -29,7 +29,7 @@ genrule( exclude = ["host-config.js"], ) + [ "buck-gen-tsjs.sh", - "//:ejs-es6.js", + "//:ejs-es6.ts", "//external-deps:compiler-js", ], out = "tsjs", diff --git a/lib/host-config.d.ts b/lib/host-config.d.ts new file mode 100644 index 00000000..28e908b9 --- /dev/null +++ b/lib/host-config.d.ts @@ -0,0 +1,4 @@ +// declarations for the GENERATED lib/host-config.js (see +// host-config.js.in and the //lib:host-config.js genrule) +export const LLVM_SUFFIX: string; +export const RUNLOOP_IMPL: string; From 0b9a56a686ef48ae516f9868fb15d8ab8a56b74c Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 19:43:03 -0700 Subject: [PATCH 069/146] =?UTF-8?q?ts:=20eir/tests=20=E2=80=94=20the=20uni?= =?UTF-8?q?t=20suite?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The harness helpers and the AST surgeries the tests perform (renaming a callee to a bogus intrinsic, plucking an arrow out of a declarator) now state their node types; caught verifier errors narrow through Error before their messages are matched. With this, every compiler source is TypeScript — the one remaining .js under lib/ is the build-generated host-config.js, declared by a .d.ts. Full matrix green: test-eir, test-stage0..3. Co-Authored-By: Claude Fable 5 --- lib/eir/{tests.js => tests.ts} | 97 ++++++++++++++++++---------------- 1 file changed, 51 insertions(+), 46 deletions(-) rename lib/eir/{tests.js => tests.ts} (90%) diff --git a/lib/eir/tests.js b/lib/eir/tests.ts similarity index 90% rename from lib/eir/tests.js rename to lib/eir/tests.ts index 2bef7fca..99ec116d 100644 --- a/lib/eir/tests.js +++ b/lib/eir/tests.ts @@ -1,8 +1,8 @@ -/* -*- Mode: js2; indent-tabs-mode: nil; tab-width: 4; js2-indent-offset: 4; js2-basic-offset: 4; -*- - * vim: set ts=4 sw=4 et tw=99 ft=js: +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// EIR unit tests. run (via the babel'd tree) with: +// EIR unit tests. run (via the tsjs+babel tree) with: // node lib/generated/lib/eir/tests.js // or through buck: // buck2 build //:test-eir @@ -12,53 +12,56 @@ import { printFunction, printModule } from "./printer"; import { verifyFunction, verifyModule } from "./verifier"; import { lowerFunctionNode, lowerProgram } from "./lower"; import { isLowerNotSupported } from "./errors"; -import { Func, Block, Inst } from "./ir"; +import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; import { DesugarClasses } from "../passes/desugar-classes"; import { DesugarDestructuring } from "../passes/desugar-destructuring"; import { DesugarGeneratorFunctions } from "../passes/desugar-generator-functions"; import { DesugarMetaProperties } from "../passes/desugar-metaproperties"; import * as esprima from "../../external-deps/esprima/esprima-es6"; +import type * as e from "../estree"; +import type { CompilerOptions } from "../options"; let failures = 0; -function test(name, fn) { +function test(name: string, fn: () => void): void { try { fn(); console.log(`pass: ${name}`); - } catch (e) { + } catch (err) { failures++; - console.log(`FAIL: ${name}: ${e.message}`); - if (e.stack) console.log(e.stack.split("\n").slice(1, 4).join("\n")); + const failure = err as Error; + console.log(`FAIL: ${name}: ${failure.message}`); + if (failure.stack) console.log(failure.stack.split("\n").slice(1, 4).join("\n")); } } -function assert(cond, msg) { +function assert(cond: boolean, msg?: string): void { if (!cond) throw new Error(`assertion failed: ${msg || ""}`); } -function assertContains(haystack, needle) { +function assertContains(haystack: string, needle: string): void { if (haystack.indexOf(needle) === -1) throw new Error(`expected output to contain '${needle}'\n---\n${haystack}\n---`); } -function findBlock(fn, prefix) { +function findBlock(fn: Func, prefix: string): Block { for (let b of fn.blocks) if (b.name.indexOf(prefix) === 0) return b; throw new Error(`no block named ${prefix}* in @${fn.name}`); } -function findFn(mod, name) { +function findFn(mod: Module, name: string): Func { for (let f of mod.functions) if (f.name === name) return f; throw new Error(`no function @${name} in module`); } -function parseFn(src) { +function parseFn(src: string): e.FunctionDeclaration { let ast = esprima.parse(src, { loc: true, raw: true }); for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; throw new Error("no function declaration in source"); } -function lowerOne(src) { +function lowerOne(src: string): { module: Module; fn: Func } { let r = lowerFunctionNode(parseFn(src)); verifyModule(r.module); return r; @@ -264,7 +267,7 @@ test("lower: try/catch produces unwind edges into a catch block", () => { let catch_bb = findBlock(fn, "catch"); assert(catch_bb.isCatch, "catch block should be marked"); - assert(catch_bb.params[0].isException, "first catch param is the exception"); + assert(catch_bb.params[0]!.isException, "first catch param is the exception"); }); test("lower: throw inside try unwinds to the local handler", () => { @@ -385,7 +388,7 @@ test("lower: for-of RHS closure capturing the loop var sees the loop env", () => "function f(mk) { let fns = []; for (let x of mk(function () { return x; })) { fns.push(function () { return x; }); } return fns; }" ); // an initial env exists before the RHS call - let entry = fn.blocks[0]; + const entry = fn.blocks[0]!; assert( entry.insts.some((i) => i.op === "make_env"), "entry should create the initial loop env before the RHS evaluates" @@ -403,15 +406,15 @@ test("lower: nested captured loops chain their envs", () => { // --- lowering: %-intrinsics ------------------------------------------------ // parse + the pre-EIR desugar passes, like preEIRConvert in compile() -function parseFnPreEIR(src) { +function parseFnPreEIR(src: string): e.FunctionDeclaration { let ast = esprima.parse(src, { loc: true, raw: true }); - let opts = { debug_passes: new Set() }; - ast = new DesugarClasses(opts).visit(ast); - ast = new DesugarDestructuring(opts).visit(ast); - ast = new DesugarGeneratorFunctions(opts).visit(ast); - ast = new DesugarSpread(opts).visit(ast); - ast = new DesugarMetaProperties(opts).visit(ast); - for (let s of ast.body) if (s.type === "FunctionDeclaration") return s; + const opts = { debug_passes: new Set() } as CompilerOptions; + ast = new DesugarClasses(opts).visit(ast) as e.Program; + ast = new DesugarDestructuring(opts).visit(ast) as e.Program; + ast = new DesugarGeneratorFunctions(opts).visit(ast) as e.Program; + ast = new DesugarSpread(opts).visit(ast) as e.Program; + ast = new DesugarMetaProperties(opts).visit(ast) as e.Program; + for (const s of ast.body) if (s.type === "FunctionDeclaration") return s; throw new Error("no function declaration in source"); } let parseFnSpreadDesugared = parseFnPreEIR; @@ -481,7 +484,8 @@ test("lower: debugger statement is a no-op", () => { test("lower: unknown %-intrinsics raise LowerNotSupported", () => { let fnNode = parseFnSpreadDesugared("function t(a) { return dummy(a); }"); // synthesize a call to an intrinsic lowering doesn't know - fnNode.body.body[0].argument.callee.name = "%noSuchIntrinsic"; + const retstmt = fnNode.body.body[0] as e.ReturnStatement; + ((retstmt.argument as e.CallExpression).callee as e.Identifier).name = "%noSuchIntrinsic"; let threw = false; try { lowerFunctionNode(fnNode); @@ -498,10 +502,10 @@ test("lower: derived class ctor lowers construct_super and rebinds this", () => ) ); verifyModule(r.module); - let ctor = null; - for (let fn of r.module.functions) if (/\.B$/.test(fn.name)) ctor = fn; - assert(ctor, "expected the B constructor in the module"); - let printed = printFunction(ctor); + let ctor: Func | null = null; + for (const fn of r.module.functions) if (/\.B$/.test(fn.name)) ctor = fn; + assert(!!ctor, "expected the B constructor in the module"); + let printed = printFunction(ctor!); assertContains(printed, "construct_super"); // this.v = v must store into construct_super's result, not the entry // this param (%1) @@ -569,19 +573,20 @@ test("lower: arrow lexical this reads the owner's captured this", () => { ); verifyModule(module); // the method stores its this into an env; the arrow env_loads it - let method = null; - for (let g of module.functions) if (/anon0$/.test(g.name)) method = g; - assert(method, "expected the method in the module"); - assertContains(printFunction(method), "env_store"); - let arrow = null; - for (let g of module.functions) if (/arrow1$/.test(g.name)) arrow = g; - assert(arrow, "expected the arrow in the module"); - assertContains(printFunction(arrow), "env_load"); + let method: Func | null = null; + for (const g of module.functions) if (/anon0$/.test(g.name)) method = g; + assert(!!method, "expected the method in the module"); + assertContains(printFunction(method!), "env_store"); + let arrow: Func | null = null; + for (const g of module.functions) if (/arrow1$/.test(g.name)) arrow = g; + assert(!!arrow, "expected the arrow in the module"); + assertContains(printFunction(arrow!), "env_load"); }); test("lower: toplevel-arrow candidates using this still fall back", () => { - let ast = esprima.parse("var f = () => this.x;", { loc: true, raw: true }); - let arrow = ast.body[0].declarations[0].init; + const ast = esprima.parse("var f = () => this.x;", { loc: true, raw: true }); + const decl = ast.body[0] as e.VariableDeclaration; + const arrow = decl.declarations[0]!.init as e.ArrowFunctionExpression; let threw = false; try { lowerFunctionNode(arrow, "f"); @@ -638,9 +643,9 @@ test("lower: labeled non-loop statement with break", () => { "function f(x) { let r = 0; done: { r = 1; if (x) break done; r = 2; } return r; }" ); verifyModule(module); - let labelBlock = null; - for (let b of fn.blocks) if (b.name.indexOf("label_done") === 0) labelBlock = b; - assert(labelBlock, "expected the label exit block"); + let labelBlock: Block | null = null; + for (const blk of fn.blocks) if (blk.name.indexOf("label_done") === 0) labelBlock = blk; + assert(!!labelBlock, "expected the label exit block"); }); test("lower: labeled continue through a finally runs the finalizer", () => { @@ -679,7 +684,7 @@ test("lower: tagged templates lower via template_callsite", () => { fn.forEachInst((inst) => { if (inst.op === "template_callsite") { sites++; - assert(inst.imms.cooked.length === 2, "two cooked strings"); + assert((inst.imms["cooked"] as readonly string[]).length === 2, "two cooked strings"); } }); assert(sites === 1, `expected one callsite, saw ${sites}`); @@ -753,7 +758,7 @@ test("verifier: rejects use that is not dominated by its def", () => { try { verifyFunction(fn); } catch (e) { - threw = /does not dominate/.test(e.message); + threw = /does not dominate/.test((e as Error).message); } assert(threw, "expected a dominance violation"); }); @@ -770,7 +775,7 @@ test("verifier: rejects unterminated blocks", () => { try { verifyFunction(fn); } catch (e) { - threw = /no terminator/.test(e.message); + threw = /no terminator/.test((e as Error).message); } assert(threw, "expected a no-terminator error"); }); @@ -801,7 +806,7 @@ test("verifier: rejects normal edges into catch blocks", () => { try { verifyFunction(fn); } catch (e) { - threw = /non-unwind edge into catch/.test(e.message); + threw = /non-unwind edge into catch/.test((e as Error).message); } assert(threw, "expected a catch-edge violation"); }); From aff8ba3766f8b16bbabd69e490ad1d18723d9b40 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 20:09:32 -0700 Subject: [PATCH 070/146] ts: the vendor declarations live in their submodules now MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The esprima and escodegen forks each gained a committed -es6.d.ts beside their .js (toshok/esprima@25f43fc, toshok/escodegen@55ee4e8; this commit bumps both pins), so TypeScript's ordinary sibling-file resolution covers them everywhere — editors, manual tsc, and the build — and the interim external-deps/typings canonical-copy scheme is gone along with its staging remap. NOTE: the submodule commits are local until `git push origin es6` runs in external-deps/esprima and external-deps/escodegen — push those before pushing this branch, or the pins dangle for everyone else. Co-Authored-By: Claude Fable 5 --- external-deps/BUCK | 3 ++- external-deps/escodegen | 2 +- external-deps/esprima | 2 +- external-deps/typings/escodegen-es6.d.ts | 11 ----------- external-deps/typings/esprima-es6.d.ts | 18 ------------------ lib/buck-gen-tsjs.sh | 18 ++++++++---------- 6 files changed, 12 insertions(+), 42 deletions(-) delete mode 100644 external-deps/typings/escodegen-es6.d.ts delete mode 100644 external-deps/typings/esprima-es6.d.ts diff --git a/external-deps/BUCK b/external-deps/BUCK index 6e65fbdc..84b08538 100644 --- a/external-deps/BUCK +++ b/external-deps/BUCK @@ -92,11 +92,12 @@ filegroup( name = "compiler-js", srcs = glob([ "esprima/esprima-es6.js", + "esprima/esprima-es6.d.ts", "escodegen/escodegen-es6.js", + "escodegen/escodegen-es6.d.ts", "estraverse/estraverse-es6.js", "esutils/esutils-es6.js", "esutils/lib/*.js", - "typings/*.d.ts", ]), visibility = ["PUBLIC"], ) diff --git a/external-deps/escodegen b/external-deps/escodegen index d73e9e44..55ee4e89 160000 --- a/external-deps/escodegen +++ b/external-deps/escodegen @@ -1 +1 @@ -Subproject commit d73e9e44ebcd6c12042aa3a48ea97aee388bc8fd +Subproject commit 55ee4e89ff0e0ed0aae0c1480c919bfdb8391c0c diff --git a/external-deps/esprima b/external-deps/esprima index e4445c9c..25f43fc4 160000 --- a/external-deps/esprima +++ b/external-deps/esprima @@ -1 +1 @@ -Subproject commit e4445c9cc2530d672c4e9f68f5e2a53673b57af0 +Subproject commit 25f43fc4e54daa272ede68faf8d79056dd967a56 diff --git a/external-deps/typings/escodegen-es6.d.ts b/external-deps/typings/escodegen-es6.d.ts deleted file mode 100644 index 87ee0968..00000000 --- a/external-deps/typings/escodegen-es6.d.ts +++ /dev/null @@ -1,11 +0,0 @@ -// CANONICAL COPY — external-deps/esprima and /escodegen are git -// submodules, so declaration files placed next to their .js are not -// tracked by this repo. The build (lib/buck-gen-tsjs.sh) stages this -// file next to the vendored .js; for editor/manual-tsc use, keep the -// untracked sibling copy in sync (cp external-deps/typings/*.d.ts into -// the matching submodule directory). -// hand-written surface declaration for the vendored escodegen build; -// only what the compiler uses. -import type { Node } from "../../lib/estree"; - -export function generate(node: Node): string; diff --git a/external-deps/typings/esprima-es6.d.ts b/external-deps/typings/esprima-es6.d.ts deleted file mode 100644 index e40a03d2..00000000 --- a/external-deps/typings/esprima-es6.d.ts +++ /dev/null @@ -1,18 +0,0 @@ -// CANONICAL COPY — external-deps/esprima and /escodegen are git -// submodules, so declaration files placed next to their .js are not -// tracked by this repo. The build (lib/buck-gen-tsjs.sh) stages this -// file next to the vendored .js; for editor/manual-tsc use, keep the -// untracked sibling copy in sync (cp external-deps/typings/*.d.ts into -// the matching submodule directory). -// hand-written surface declaration for the vendored esprima fork; only -// what the compiler uses. -import type { Program } from "../../lib/estree"; - -export interface ParseOptions { - loc?: boolean; - raw?: boolean; - tolerant?: boolean; - sourceType?: "script" | "module"; -} - -export function parse(source: string, options?: ParseOptions): Program; diff --git a/lib/buck-gen-tsjs.sh b/lib/buck-gen-tsjs.sh index 6512bb98..c5d7ccb7 100644 --- a/lib/buck-gen-tsjs.sh +++ b/lib/buck-gen-tsjs.sh @@ -37,17 +37,15 @@ for f in ejs-es6.js ejs-es6.ts; do if [ -e "$f" ]; then cp "$f" "$STAGE/$f"; fi done -# hand-written surface declarations for the vendored external-deps JS +# hand-written surface declarations for the vendored external-deps JS, +# committed in the esprima/escodegen submodules next to their .js # (relative imports like ../../external-deps/escodegen/escodegen-es6 -# typecheck against these; the .js resolves at runtime). the canonical -# copies live in external-deps/typings (the vendored dirs are git -# submodules); each -es6.d.ts stages next to /-es6.js -if [ -d compiler-js/typings ]; then - for f in compiler-js/typings/*-es6.d.ts; do - base=$(basename "$f" -es6.d.ts) - mkdir -p "$STAGE/external-deps/$base" - cp "$f" "$STAGE/external-deps/$base/$base-es6.d.ts" - done +# typecheck against these; the .js resolves at runtime) +if [ -d compiler-js ]; then + (cd compiler-js && find . -name "*.d.ts" | while read -r f; do + mkdir -p "$STAGE/external-deps/$(dirname "$f")" + cp "$f" "$STAGE/external-deps/$f" + done) fi # copy the .js files through From 0977de28ff102a98f5bd818f0879ac2c2bb9cd86 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 20:22:13 -0700 Subject: [PATCH 071/146] =?UTF-8?q?ci:=20GitHub=20Actions=20=E2=80=94=20th?= =?UTF-8?q?e=20buck2=20bootstrap=20matrix=20on=20macOS=20arm64?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Replaces the CircleCI/Makefile-era config (three build systems stale). One macos-15 job: brew llvm+buck2, npm ci, the node-llvm addon build, a standalone tsc typecheck for fast type-error feedback, then the full buck2 matrix — test-eir and test-stage0 through test-stage3, which includes every desugar/EIR/emission suite run and the stage2/stage3 byte-identity fixed point. Sequential targets in one job so buck2's artifact reuse carries the stage ladder. llvm intentionally tracks the unversioned homebrew formula, matching what local development builds against (.buckconfig's /opt/homebrew/opt/llvm prefix); if a future llvm major breaks the runtime or node-llvm, pin llvm@NN in both places together. Co-Authored-By: Claude Fable 5 --- .circleci/config.yml | 149 --------------------------------------- .github/workflows/ci.yml | 68 ++++++++++++++++++ 2 files changed, 68 insertions(+), 149 deletions(-) delete mode 100644 .circleci/config.yml create mode 100644 .github/workflows/ci.yml diff --git a/.circleci/config.yml b/.circleci/config.yml deleted file mode 100644 index a12aae84..00000000 --- a/.circleci/config.yml +++ /dev/null @@ -1,149 +0,0 @@ -version: 2.1 - -commands: - attach_ejs_workspace: - steps: - - attach_workspace: - at: /home/circleci - persist_ejs_workspace: - steps: - - persist_to_workspace: - root: /home/circleci - paths: - - project - install_native_deps: - steps: - - run: sh ci/setup-pkg-linux.sh - - run: sh ci/install-llvm-linux.sh - -jobs: - setup: - docker: - - image: cimg/node:20.6.1 - environment: - LLVM_SUFFIX: "" - steps: - - checkout - - install_native_deps - - run: sudo npm install -g node-gyp - - run: npm ci - - run: make all-recurse - - persist_ejs_workspace - - package: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - run: echo hi - - build-stage0: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make stage0 - - check-stage0: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make check-stage0 - - build-stage1: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make stage1 - - persist_to_workspace: - root: . - paths: - - ejs.exe.stage1 - - check-stage1: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make check-stage1 - - build-stage2: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make stage2 - - persist_to_workspace: - root: . - paths: - - ejs.exe.stage2 - - check-stage2: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make check-stage2 - - build-stage3: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make stage3 - - persist_to_workspace: - root: . - paths: - - ejs.exe.stage3 - - check-stage3: - docker: - - image: cimg/node:20.6.1 - steps: - - attach_ejs_workspace - - install_native_deps - - run: make check-stage3 - -workflows: - build: - jobs: - - setup - - build-stage0: - requires: - - setup - - check-stage0: - requires: - - build-stage0 - - build-stage1: - requires: - - build-stage0 - # - check-stage1: - # requires: - # - build-stage1 - - build-stage2: - requires: - - build-stage1 - # - check-stage2: - # requires: - # - build-stage2 - - build-stage3: - requires: - - build-stage2 - # - check-stage3: - # requires: - # - build-stage3 - # - package: - # requires: - # - check-stage0 - # - check-stage1 - # - check-stage2 - # - check-stage3 diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 00000000..f24507d5 --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,68 @@ +# EchoJS CI: the full buck2 bootstrap matrix on macOS arm64 (the +# configuration the compiler is developed against). +# +# One job, sequential targets: buck2 shares artifacts between them, so +# the stage ladder (stage1 builds feed stage2/3) costs one traversal. +# +# test-eir EIR unit tests (node-hosted) +# test-stage0 full suite against the node-hosted compiler +# test-stage1 suite against the self-compiled compiler +# test-stage2 suite against stage1's self-compile +# test-stage3 suite + the stage2/stage3 byte-identity fixed point +name: CI + +on: + push: + branches: [main, eir] + pull_request: + +concurrency: + group: ${{ github.workflow }}-${{ github.ref }} + cancel-in-progress: true + +jobs: + bootstrap-matrix: + runs-on: macos-15 # arm64 + timeout-minutes: 120 + steps: + - uses: actions/checkout@v4 + with: + submodules: recursive + + - name: Install llvm + buck2 + run: | + brew install llvm buck2 + "$(brew --prefix llvm)/bin/llvm-config" --version + buck2 --version + + - uses: actions/setup-node@v4 + with: + node-version: 22 + + - name: npm ci + run: npm ci + + # the node-hosted (stage0) compiler drives llvm through this + # node-gyp native addon; buck picks up the built artifact + - name: Build the node-llvm addon + run: ./node-llvm/build-addon.sh "$(brew --prefix llvm)" + + - name: TypeScript typecheck + run: node node_modules/typescript/bin/tsc -p tsconfig.json + + - name: buck2 bootstrap matrix + run: | + buck2 build \ + //:test-eir \ + //:test-stage0 \ + //:test-stage1 \ + //:test-stage2 \ + //:test-stage3 + + - name: Surface test logs on failure + if: failure() + run: | + find buck-out/v2 -name "test-*.log" -newer package.json 2>/dev/null | while read -r f; do + echo "=== $f ===" + tail -60 "$f" + done || true From b601626c0e07587a97cb50d6ee42decceb834f67 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 20:55:21 -0700 Subject: [PATCH 072/146] linux: the full bootstrap matrix runs on aarch64-linux Proven end to end in an ubuntu-24.04 arm64 container: test-eir plus stages 0 through 3, including the stage2/stage3 byte-identity fixed point, self-hosted on Linux. What the port surfaced: - ejs-generator.c's suspended-stack GC scan had no aarch64-linux case (saved SP comes from uc_mcontext.sp); - the libuv runloop still used pre-1.0 timer callbacks (two-argument); - buck-srcdir-tree.sh's ar-merge absolutized archive paths INSIDE the cd'd subshell, so every relative path resolved against the temp dir; - runtime/BUCK never included ejs-log.c off darwin (the .m twin lives in :echo-objc), leaving _ejs_log undefined at link; - NaN-boxing's 47-bit payload meets linux's 48-bit address space: PIE ASLR maps the data segment (static atom strings box by address) above 2^47, and top-down mmap hands the GC unboxable pages. Links are -no-pie on linux, and the GC allocates through mmap_boxable(), which hints regions below 2^47 and verifies what it gets; - the driver passed Darwin's -arch flag to linux clang; - node-compat.ejs had no arm64-linux module_file entry. CI grows a bootstrap-matrix-linux job (ubuntu-24.04-arm: apt llvm 22, buck2 release binary, libunwind/libuv, --config llvm.prefix=/usr/lib/llvm-22). Both jobs pin node 22.4.0: most test baselines are generated live by `node `, and console.log's inspect format drifts across node releases (recorded in plans.md; the durable fix is value-asserting tests). macOS matrix re-verified green over these changes. Co-Authored-By: Claude Fable 5 --- .github/workflows/ci.yml | 57 ++++++++++++++++++++++++++++++++++++- buck-srcdir-tree.sh | 5 +++- docs/plans.md | 6 ++++ ejs-es6.ts | 8 ++++-- node-compat/node-compat.ejs | 1 + runtime/BUCK | 6 ++-- runtime/ejs-gc.c | 35 ++++++++++++++++++++--- runtime/ejs-generator.c | 2 ++ runtime/ejs-runloop-libuv.c | 3 +- 9 files changed, 111 insertions(+), 12 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index f24507d5..4c4d6e33 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -35,9 +35,12 @@ jobs: "$(brew --prefix llvm)/bin/llvm-config" --version buck2 --version + # pinned exactly: most test baselines are generated live by + # running `node `, and console.log's inspect format drifts + # across node releases (22.4 -> 22.23 changed array formatting) - uses: actions/setup-node@v4 with: - node-version: 22 + node-version: 22.4.0 - name: npm ci run: npm ci @@ -66,3 +69,55 @@ jobs: echo "=== $f ===" tail -60 "$f" done || true + + bootstrap-matrix-linux: + runs-on: ubuntu-24.04-arm + timeout-minutes: 150 + steps: + - uses: actions/checkout@v4 + with: + submodules: recursive + + - name: Install packages + run: | + sudo apt-get update -qq + sudo apt-get install -y -qq build-essential cmake zstd libunwind-dev libuv1-dev + + - name: Install llvm 22 + run: | + curl -sSf https://apt.llvm.org/llvm.sh -o /tmp/llvm.sh + chmod +x /tmp/llvm.sh + sudo /tmp/llvm.sh 22 + /usr/lib/llvm-22/bin/llvm-config --version + # prelude's cxx toolchain wants a bare clang++ on PATH + echo "/usr/lib/llvm-22/bin" >> "$GITHUB_PATH" + + - name: Install buck2 + run: | + curl -sL https://github.com/facebook/buck2/releases/download/latest/buck2-aarch64-unknown-linux-gnu.zst -o /tmp/buck2.zst + zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 || sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2' + sudo chmod +x /usr/local/bin/buck2 + buck2 --version + + # pinned exactly — see the macOS job's note + - uses: actions/setup-node@v4 + with: + node-version: 22.4.0 + + - name: npm ci + run: npm ci + + - name: Build the node-llvm addon + run: ./node-llvm/build-addon.sh /usr/lib/llvm-22 + + # babel-node (for `// generator: babel-node` test baselines) comes + # from the repo's node_modules + - name: buck2 bootstrap matrix + run: | + export PATH="$PWD/node_modules/.bin:$PATH" + buck2 build --config llvm.prefix=/usr/lib/llvm-22 \ + //:test-eir \ + //:test-stage0 \ + //:test-stage1 \ + //:test-stage2 \ + //:test-stage3 diff --git a/buck-srcdir-tree.sh b/buck-srcdir-tree.sh index e0f20df2..64629c3f 100644 --- a/buck-srcdir-tree.sh +++ b/buck-srcdir-tree.sh @@ -53,7 +53,10 @@ else rm -rf "$MERGE" mkdir -p "$MERGE" for a in "${ARCHIVES[@]}"; do - (cd "$MERGE" && ar x "$(cd "$(dirname "$a")" && pwd)/$(basename "$a")") + # absolutize BEFORE cd'ing: inside the subshell the relative + # archive path would resolve against $MERGE + abs="$(cd "$(dirname "$a")" && pwd)/$(basename "$a")" + (cd "$MERGE" && ar x "$abs") done ar rs "$LIB" "$MERGE"/*.o "$TMP/ejs-invoke-closure-catch.o" fi diff --git a/docs/plans.md b/docs/plans.md index 87cc4076..7e2dc26d 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -144,6 +144,12 @@ Static linking remains the regime (no dynamic loading planned). ## Testing / CI +- Test baselines are mostly generated live by running `node `, + which makes them sensitive to node's console.log inspect-format + drift (22.4 -> 22.23 changed array formatting); CI pins node 22.4.0. + The durable fix is a harness that asserts on values rather than + inspect output. + - The stage ladder (`//:test-eir`, `//:test-stage0..3`) IS the EIR matrix now; the `-ir`/`-legacy` target duplicates are gone. - Broader coverage generally, as a prerequisite for the TS port. diff --git a/ejs-es6.ts b/ejs-es6.ts index 1c730fb6..b01296c3 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -372,9 +372,11 @@ function target_link_args(triple: TripleT): string[] { let args = ["-arch", triple.clangArch()]; if (triple.os === "linux") { - // on ubuntu 14.04, at least, clang spits out a warning about this flag being unused (presumably because there's no other arch) - if (triple.arch === "x86_64") return []; - return args; + // -arch is a Darwin-only clang flag. -no-pie keeps the data + // segment (static atom strings get NaN-boxed by address) below + // the 47-bit ejsval payload limit; PIE ASLR on aarch64 maps it + // above 2^47. + return ["-no-pie"]; } if (triple.os === "macos") { diff --git a/node-compat/node-compat.ejs b/node-compat/node-compat.ejs index 14a3ae6b..af07518b 100644 --- a/node-compat/node-compat.ejs +++ b/node-compat/node-compat.ejs @@ -46,6 +46,7 @@ "link_flags": "", "module_version": "0.1.0-alpha.2", "module_file": { + "arm64-linux": "libejsnodecompat-module.a", "x86_64-linux": "libejsnodecompat-module.a", "arm64-macos": "libejsnodecompat-module.a", "arm64-ios-simulator": "libejsnodecompat-module.a.iossim", diff --git a/runtime/BUCK b/runtime/BUCK index 86d4179b..158fa98c 100644 --- a/runtime/BUCK +++ b/runtime/BUCK @@ -102,8 +102,10 @@ cxx_library( ":atoms", "//external-deps:parson.c", ] + select({ - "DEFAULT": ["ejs-runloop-noop.c"], - "config//os:linux": ["ejs-runloop-libuv.c"], + # non-darwin platforms use the plain-C log impl (darwin's + # ejs-log.m lives in :echo-objc) + "DEFAULT": ["ejs-runloop-noop.c", "ejs-log.c"], + "config//os:linux": ["ejs-runloop-libuv.c", "ejs-log.c"], # the darwin (objc) sources live in :echo-objc; the system cxx # toolchain has no objc compiler "config//os:macos": [], diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index d070c982..f01316b1 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -192,18 +192,45 @@ typedef struct _RootSetEntry { static RootSetEntry *root_set; +// GC-heap pointers get NaN-boxed into a 47-bit ejsval payload, so every +// page must map below 2^47. macOS hands out low addresses naturally; +// linux (48-bit VA, top-down mmap) does not — ask for a hinted region +// and bump the hint as regions fill. +static void* +mmap_boxable(size_t size) +{ +#ifdef TARGET_LINUX + static uintptr_t hint = 0x280000000000UL; // well below 2^47 + for (int tries = 0; tries < 64; tries++) { + void* res = mmap((void*)hint, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, MAP_FD, 0); + if (res == MAP_FAILED) return NULL; + if (((uintptr_t)res + size) < (1UL << 47)) { + hint = (uintptr_t)res + size; + return res; + } + // unboxable address: drop it and try a fresh hint + munmap(res, size); + hint += 0x100000000UL; // 4GB stride + } + return NULL; +#else + void* res = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, MAP_FD, 0); + return res == MAP_FAILED ? NULL : res; +#endif +} + static void* alloc_from_os(size_t size, size_t align) { if (align == 0) { size = MAX(size, PAGE_SIZE); - void* res = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, MAP_FD, 0); + void* res = mmap_boxable(size); SPEW(2, _ejs_log ("mmap for 0 alignment = %p\n", res)); - return res == MAP_FAILED ? NULL : res; + return res; } - void* res = mmap(NULL, size*2, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, MAP_FD, 0); - if (res == MAP_FAILED) { + void* res = mmap_boxable(size*2); + if (res == NULL) { return NULL; } diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 64e33f02..3a1b7c02 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -375,6 +375,8 @@ _ejs_generator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) #elif linux #if TARGET_CPU_AMD64 (void*)gen->generator_context.uc_mcontext.gregs[REG_RSP] +#elif TARGET_CPU_ARM64 + (void*)gen->generator_context.uc_mcontext.sp #else #error "unimplemented linux cpu arch" #endif diff --git a/runtime/ejs-runloop-libuv.c b/runtime/ejs-runloop-libuv.c index 8e01a792..7756b7be 100644 --- a/runtime/ejs-runloop-libuv.c +++ b/runtime/ejs-runloop-libuv.c @@ -11,8 +11,9 @@ typedef struct { EJSBool repeats; } task_timer; +// libuv >= 1.0 timer callbacks take only the handle static void -invoke_task(uv_timer_t* timer, int unused) +invoke_task(uv_timer_t* timer) { task_timer* t = (task_timer*)timer->data; t->task(t->data); From b286494299ec2bd71b6981d8bbb8d0bcab76704f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 21:18:15 -0700 Subject: [PATCH 073/146] ci: matrix the linux bootstrap over arm64/x86_64; bootstrap-$os-$arch job names MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Job names now follow bootstrap-$os-$arch: bootstrap-macos-arm64, bootstrap-linux-arm64, bootstrap-linux-x86_64. The two linux arches differ only in runner and buck2 release triple, so they share one job via a matrix. macOS stays a separate job since its steps (brew, tsc typecheck) don't overlap enough to share. x86_64-linux validated in a local amd64 container: test-eir and the full stage0 test suite build green with no code changes — the existing defs.bzl selects and TARGET_CPU_AMD64 runtime paths were already correct, and x86_64's 47-bit VA space makes NaN-boxing a non-issue. Co-Authored-By: Claude Fable 5 --- .github/workflows/ci.yml | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 4c4d6e33..0fd0af5d 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -21,7 +21,8 @@ concurrency: cancel-in-progress: true jobs: - bootstrap-matrix: + bootstrap-macos-arm64: + name: bootstrap-macos-arm64 runs-on: macos-15 # arm64 timeout-minutes: 120 steps: @@ -70,9 +71,20 @@ jobs: tail -60 "$f" done || true - bootstrap-matrix-linux: - runs-on: ubuntu-24.04-arm + bootstrap-linux: + name: bootstrap-linux-${{ matrix.arch }} + runs-on: ${{ matrix.runner }} timeout-minutes: 150 + strategy: + fail-fast: false + matrix: + include: + - arch: arm64 + runner: ubuntu-24.04-arm + buck2_triple: aarch64-unknown-linux-gnu + - arch: x86_64 + runner: ubuntu-24.04 + buck2_triple: x86_64-unknown-linux-gnu steps: - uses: actions/checkout@v4 with: @@ -94,9 +106,8 @@ jobs: - name: Install buck2 run: | - curl -sL https://github.com/facebook/buck2/releases/download/latest/buck2-aarch64-unknown-linux-gnu.zst -o /tmp/buck2.zst - zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 || sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2' - sudo chmod +x /usr/local/bin/buck2 + curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-${{ matrix.buck2_triple }}.zst" -o /tmp/buck2.zst + sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' buck2 --version # pinned exactly — see the macOS job's note From 0fd8196fbf152254237ebcffa72bacc0891acb1e Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 21:37:26 -0700 Subject: [PATCH 074/146] =?UTF-8?q?ci:=20buck2=20isn't=20in=20homebrew=20c?= =?UTF-8?q?ore=20=E2=80=94=20install=20the=20release=20binary=20on=20macOS?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Locally buck2 comes from the facebook/fb tap; `brew install buck2` fails with 'No available formula'. Download the aarch64-apple-darwin release binary instead, same as the linux jobs — which also keeps all three jobs on the same 'latest' buck2 release. Co-Authored-By: Claude Fable 5 --- .github/workflows/ci.yml | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 0fd0af5d..dfeb617d 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -30,10 +30,17 @@ jobs: with: submodules: recursive - - name: Install llvm + buck2 + - name: Install llvm run: | - brew install llvm buck2 + brew install llvm zstd "$(brew --prefix llvm)/bin/llvm-config" --version + + # buck2 isn't in homebrew core (locally it comes from the + # facebook/fb tap); use the release binary like the linux jobs + - name: Install buck2 + run: | + curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-aarch64-apple-darwin.zst" -o /tmp/buck2.zst + sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' buck2 --version # pinned exactly: most test baselines are generated live by From 1701f7ae364a198ab5adfd03d3bc924dfab035b1 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 22:13:00 -0700 Subject: [PATCH 075/146] eir: allocation sinking for object/array literals + effects-driven DCE MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The first EIR optimization pass. Non-escaping make_object/make_array results are scalar-replaced: get_prop_atom / const-index get_prop reads fold to the stored values, and write-only allocations die with their stores. A general dead-instruction sweep (driven by the ops.ts effect table, with the alloc ops' own-storage WRITE special-cased) cleans up the freed operand chains. Everything is intra-function and deliberately conservative: any use other than a base-position property get/set escapes; instructions carrying unwind targets are left alone; reads fold only for own keys that are never written; stores are removed only when their key is provably an own property (a [[Set]] to a non-own key could hit a prototype-chain accessor). Runs at -O1 and up, between verify and emit; the module re-verifies after optimization. --dump-after eir-opt prints the optimized module. Measured honestly: this alone fires rarely on existing code — the desugars wrap destructuring in IIFEs, so the real-world shape is make_env/make_closure/call, exactly the make_env sinking the plans doc ranks first. This commit is the framework + the literal case; direct-call inlining and env scalar replacement come next. 15 new unit tests; full bootstrap matrix green including stage2/stage3 byte-identity (the pass is deterministic). Co-Authored-By: Claude Fable 5 --- ejs-es6.ts | 2 +- lib/eir/integrate.ts | 18 +++ lib/eir/optimize.ts | 295 +++++++++++++++++++++++++++++++++++++++++++ lib/eir/tests.ts | 110 ++++++++++++++++ 4 files changed, 424 insertions(+), 1 deletion(-) create mode 100644 lib/eir/optimize.ts diff --git a/ejs-es6.ts b/ejs-es6.ts index b01296c3..c0e402c9 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -217,7 +217,7 @@ const args: Record = { "--dump-after": { handler: add_debug_after_pass, handlerArgc: 1, - help: "dump the AST after the named pass; `--dump-after eir` dumps the lowered EIR module(s)", + help: "dump the AST after the named pass; `--dump-after eir` dumps the lowered EIR module(s), `--dump-after eir-opt` the optimized EIR", }, "--debug-after": { handler: add_debug_after_pass, diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index c9a48be5..78c731b0 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -28,6 +28,7 @@ import { isLowerNotSupported } from "./errors"; import { Module } from "./ir"; import { FunctionBuilder } from "./builder"; import { verifyModule } from "./verifier"; +import { optimizeModule } from "./optimize"; import { printModule } from "./printer"; import type * as e from "../estree"; import type { ModuleInfo } from "../module-info"; @@ -50,6 +51,11 @@ function dumpRequested(options: CompilerOptions | undefined): boolean { return !!(options && options.debug_passes && options.debug_passes.has("eir")); } +// --dump-after eir-opt: print the module again after optimization +function dumpOptRequested(options: CompilerOptions | undefined): boolean { + return !!(options && options.debug_passes && options.debug_passes.has("eir-opt")); +} + function dumpModule(filename: string, mode: string, eir_module: Module): void { console.log(`// EIR module for ${filename} (${mode})`); console.log(printModule(eir_module)); @@ -389,6 +395,18 @@ export function collectEIRToplevel( let accessors = buildModuleAccessors(eir_module, this_module_info); verifyModule(eir_module); + if (options.opt_level > 0) { + const stats = optimizeModule(eir_module); + if (stats.allocs_sunk || stats.reads_folded || stats.dead_removed) + debug.log( + 1, + `EIR-opt: ${filename}: ${stats.allocs_sunk} alloc(s) sunk, ` + + `${stats.reads_folded} read(s) folded, ${stats.dead_removed} dead inst(s) removed` + ); + verifyModule(eir_module); + if (dumpOptRequested(options)) dumpModule(filename, "optimized", eir_module); + } + toplevel.eir_module = eir_module; toplevel.eir_main = info.name; toplevel.body = { type: "BlockStatement", body: [], loc: toplevel.loc }; diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts new file mode 100644 index 00000000..20d67564 --- /dev/null +++ b/lib/eir/optimize.ts @@ -0,0 +1,295 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// EIR optimization passes. The first: allocation sinking (scalar +// replacement) for non-escaping object/array literals, plus the dead +// pure-instruction elimination that sweeps up after it. +// +// The effect table in ops.ts is the contract here: nothing below +// pattern-matches behavior that isn't declared there, with one narrow +// exception — the alloc ops' WRITE effect covers writes to their own +// fresh storage, so a dead allocation is removable even though a dead +// WRITE-effect instruction generally isn't. +// +// Everything is intra-function and flow-insensitive. An allocation is +// sinkable only if every use is a base-position property get/set; a read +// folds only if its key is an own data property that is never written +// (so the initial value flows everywhere without any CFG reasoning — +// non-escape means no one else can write it). Instructions carrying +// explicit normal/unwind targets (may-throw ops inside protected +// regions) are block terminators; we neither fold nor remove them. + +import { Func, Inst, Module, replaceAllUses } from "./ir"; +import { Effect, opInfo } from "./ops"; + +export interface OptStats { + allocs_sunk: number; + reads_folded: number; + dead_removed: number; +} + +// uses of `value` within fn, with enough position info to classify +interface Use { + inst: Inst; + // operand index, or -1 for a branch-edge argument + index: number; +} + +function usesOf(fn: Func, value: Inst): Use[] { + const uses: Use[] = []; + fn.forEachInst((inst) => { + for (let i = 0; i < inst.operands.length; i++) { + if (inst.operands[i] === value) uses.push({ inst, index: i }); + } + if (inst.targets) { + for (const t of inst.targets) { + for (const a of t.args) { + if (a === value) uses.push({ inst, index: -1 }); + } + } + } + }); + return uses; +} + +function removeInst(inst: Inst): void { + const b = inst.block!; + const idx = b.insts.indexOf(inst); + if (idx >= 0) b.insts.splice(idx, 1); + inst.block = null; +} + +// --- allocation sinking ---------------------------------------------------- + +// how an allocation's use participates, per classifyUses +interface AllocUses { + // get_prop_atom reads, by atom + atomReads: Inst[]; + // set_prop_atom writes (alloc in base position only) + atomWrites: Inst[]; + // get_prop reads with the alloc as base + computedReads: Inst[]; + escapes: boolean; +} + +// classify every use of a make_object/make_array result. base-position +// gets and atom-keyed sets are the only non-escaping uses; anything else +// (call/return/throw operands, edge arguments, value or key positions, +// computed sets — whose key evaluation we must not disturb — accessor +// defines, deletes) escapes. +function classifyUses(fn: Func, alloc: Inst): AllocUses { + const r: AllocUses = { atomReads: [], atomWrites: [], computedReads: [], escapes: false }; + for (const use of usesOf(fn, alloc)) { + const { inst, index } = use; + if (index === -1) { + r.escapes = true; // flows into a block param + } else if (inst.op === "get_prop_atom" && index === 0) { + r.atomReads.push(inst); + } else if (inst.op === "set_prop_atom" && index === 0) { + r.atomWrites.push(inst); + } else if (inst.op === "get_prop" && index === 0) { + r.computedReads.push(inst); + } else { + r.escapes = true; + } + } + return r; +} + +// the own-key initial value for `atom` in a make_object, honoring +// duplicate keys (last definition wins) +function ownObjectValue(alloc: Inst, atom: string): Inst | null { + const keys = alloc.imms.keys as readonly string[]; + for (let i = keys.length - 1; i >= 0; i--) { + if (keys[i] === atom) return alloc.operands[i]!; + } + return null; +} + +// the element initial value for a const-numeric index into a make_array, +// or null for holes / out-of-range / non-element keys +function ownArrayElement(alloc: Inst, index: number): Inst | null { + if (!Number.isInteger(index) || index < 0) return null; + if (alloc.imms.len === undefined) { + // dense: operands are the elements in order + return index < alloc.operands.length ? alloc.operands[index]! : null; + } + // holey: imms.indices[i] is the array index operand i lands at + const indices = alloc.imms.indices as readonly number[]; + for (let i = 0; i < indices.length; i++) { + if (indices[i] === index) return alloc.operands[i]!; + } + return null; +} + +function arrayLength(alloc: Inst): number { + return alloc.imms.len !== undefined ? (alloc.imms.len as number) : alloc.operands.length; +} + +// fold a read to `value`: all the read's uses see the value directly, +// and the read disappears. only for target-less reads — a read with +// unwind targets terminates its block and can't simply vanish. +function foldRead(fn: Func, read: Inst, value: Inst): void { + replaceAllUses(fn, read, value); + removeInst(read); +} + +// materialize a `const` number in front of `before` (for .length folds) +function constNumberBefore(fn: Func, before: Inst, value: number): Inst { + const c = new Inst(fn, "const", [], { kind: "number", value: value }); + const b = before.block!; + c.block = b; + b.insts.splice(b.insts.indexOf(before), 0, c); + return c; +} + +// try to scalar-replace one allocation. returns true if anything changed. +function sinkAlloc(fn: Func, alloc: Inst, stats: OptStats): boolean { + const isArray = alloc.op === "make_array"; + const uses = classifyUses(fn, alloc); + if (uses.escapes) return false; + + let changed = false; + const writtenAtoms = new Set(); + for (const w of uses.atomWrites) writtenAtoms.add(w.imms.atom as string); + + if (isArray) { + // element writes can't reach make_array (set_prop is an escape), + // but a `length` write truncates — it blocks every fold + if (writtenAtoms.size === 0) { + for (const read of uses.atomReads) { + if (read.targets) continue; + if ((read.imms.atom as string) !== "length") continue; // prototype read + foldRead(fn, read, constNumberBefore(fn, read, arrayLength(alloc))); + stats.reads_folded++; + changed = true; + } + for (const read of uses.computedReads) { + if (read.targets) continue; + const key = read.operands[1]!; + if (key.op !== "const" || key.imms.kind !== "number") continue; + const el = ownArrayElement(alloc, key.imms.value as number); + if (!el) continue; // hole or out of range: prototype read + foldRead(fn, read, el); + stats.reads_folded++; + changed = true; + } + } + } else { + for (const read of uses.atomReads) { + if (read.targets) continue; + const atom = read.imms.atom as string; + if (writtenAtoms.has(atom)) continue; // flow-sensitive: not yet + const v = ownObjectValue(alloc, atom); + if (!v) continue; // not an own key: prototype read + foldRead(fn, read, v); + stats.reads_folded++; + changed = true; + } + } + + // if only atom writes remain, the allocation is write-only and dies + // along with its stores — but only stores to OWN keys are provably + // unobservable ([[Set]] to a non-own key walks the prototype chain, + // where a pathological accessor could intercept it). arrays' one + // own atom is `length`. + const ownWrite = (w: Inst) => + isArray + ? (w.imms.atom as string) === "length" + : ownObjectValue(alloc, w.imms.atom as string) !== null; + const remaining = classifyUses(fn, alloc); + if ( + !remaining.escapes && + remaining.atomReads.length === 0 && + remaining.computedReads.length === 0 && + remaining.atomWrites.every((w) => !w.targets && ownWrite(w)) + ) { + for (const w of remaining.atomWrites) removeInst(w); + removeInst(alloc); + stats.allocs_sunk++; + changed = true; + } + return changed; +} + +function sinkAllocations(fn: Func, stats: OptStats): boolean { + const candidates: Inst[] = []; + fn.forEachInst((inst) => { + if (inst.op === "make_object" || inst.op === "make_array") candidates.push(inst); + }); + let changed = false; + for (const c of candidates) { + if (!c.block) continue; // removed by an earlier candidate's fold + if (sinkAlloc(fn, c, stats)) changed = true; + } + return changed; +} + +// --- dead instruction elimination -------------------------------------------- + +// dead-removable: unused results whose computation is unobservable. +// READ|GC effects are fine (a dead read never happens); THROW/WRITE/CALL +// are not — except the literal alloc ops, whose WRITE is to their own +// fresh storage. +function removableWhenDead(inst: Inst): boolean { + if (inst.op === "blockparam") return false; + if (inst.targets && inst.targets.length > 0) return false; + if (inst.op === "make_object" || inst.op === "make_array") return true; + const info = opInfo(inst.op); + if (info.terminator) return false; + return (info.effects & ~(Effect.READ | Effect.GC)) === 0; +} + +function eliminateDead(fn: Func, stats: OptStats): boolean { + // use counts over operands and edge arguments + const counts = new Map(); + const bump = (v: Inst) => counts.set(v, (counts.get(v) || 0) + 1); + fn.forEachInst((inst) => { + for (const o of inst.operands) bump(o); + if (inst.targets) { + for (const t of inst.targets) for (const a of t.args) if (a) bump(a); + } + }); + + const worklist: Inst[] = []; + fn.forEachInst((inst) => { + if (!counts.get(inst) && removableWhenDead(inst)) worklist.push(inst); + }); + + let changed = false; + while (worklist.length > 0) { + const inst = worklist.pop()!; + if (!inst.block) continue; + removeInst(inst); + stats.dead_removed++; + changed = true; + for (const o of inst.operands) { + const n = counts.get(o)! - 1; + counts.set(o, n); + if (n === 0 && o.block && removableWhenDead(o)) worklist.push(o); + } + } + return changed; +} + +// --- driver ------------------------------------------------------------------- + +export function optimizeFunction(fn: Func, stats?: OptStats): OptStats { + const s = stats || { allocs_sunk: 0, reads_folded: 0, dead_removed: 0 }; + // to fixpoint: sinking an outer literal can un-escape one nested + // inside it (its only use was as the outer's operand) + let rounds = 0; + for (;;) { + let changed = sinkAllocations(fn, s); + if (eliminateDead(fn, s)) changed = true; + if (!changed || ++rounds > 10) break; + } + return s; +} + +export function optimizeModule(m: Module): OptStats { + const stats: OptStats = { allocs_sunk: 0, reads_folded: 0, dead_removed: 0 }; + for (const fn of m.functions) optimizeFunction(fn, stats); + return stats; +} diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 99ec116d..08c8666f 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -11,6 +11,7 @@ import { FunctionBuilder } from "./builder"; import { printFunction, printModule } from "./printer"; import { verifyFunction, verifyModule } from "./verifier"; import { lowerFunctionNode, lowerProgram } from "./lower"; +import { optimizeFunction } from "./optimize"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; @@ -811,6 +812,115 @@ test("verifier: rejects normal edges into catch blocks", () => { assert(threw, "expected a catch-edge violation"); }); +// --- optimize: allocation sinking ---------------------------------------------- + +function assertNotContains(haystack: string, needle: string): void { + if (haystack.indexOf(needle) !== -1) + throw new Error(`expected output to NOT contain '${needle}'\n---\n${haystack}\n---`); +} + +function lowerAndOptimize(src: string): { fn: Func; printed: string } { + let { fn } = lowerOne(src); + optimizeFunction(fn); + verifyFunction(fn); + return { fn, printed: printFunction(fn) }; +} + +test("optimize: non-escaping object literal reads fold and the alloc dies", () => { + let { printed } = lowerAndOptimize("function f() { let o = { a: 1, b: 2 }; return o.a + o.b; }"); + assertNotContains(printed, "make_object"); + assertNotContains(printed, "get_prop_atom"); +}); + +test("optimize: duplicate literal keys fold to the last definition", () => { + let { fn, printed } = lowerAndOptimize("function f() { let o = { a: 1, a: 2 }; return o.a; }"); + assertNotContains(printed, "make_object"); + // the surviving return operand should be the const 2 + let ret: Inst | null = null; + fn.forEachInst((i) => { if (i.op === "return") ret = i; }); + assert(ret!.operands[0]!.imms.value === 2, "expected the second definition's value"); +}); + +test("optimize: escaping object literal is untouched", () => { + let { printed } = lowerAndOptimize("function f(g) { let o = { a: 1 }; g(o); return o.a; }"); + assertContains(printed, "make_object"); + assertContains(printed, 'get_prop_atom'); +}); + +test("optimize: write-only object literal dies with its stores", () => { + let { printed } = lowerAndOptimize("function f(x) { let o = { a: 1 }; o.a = x; return x; }"); + assertNotContains(printed, "make_object"); + assertNotContains(printed, "set_prop_atom"); +}); + +test("optimize: a written key blocks folding its reads", () => { + let { printed } = lowerAndOptimize("function f(x) { let o = { a: 1 }; o.a = x; return o.a; }"); + assertContains(printed, "make_object"); + assertContains(printed, "get_prop_atom"); +}); + +test("optimize: non-own-key read keeps the object (prototype chain)", () => { + let { printed } = lowerAndOptimize("function f() { let o = { a: 1 }; return o.toString; }"); + assertContains(printed, "make_object"); +}); + +test("optimize: array literal const-index and length reads fold", () => { + let { printed } = lowerAndOptimize("function f() { let a = [10, 20, 30]; return a[0] + a.length; }"); + assertNotContains(printed, "make_array"); + assertNotContains(printed, "get_prop"); +}); + +test("optimize: array hole reads keep the array", () => { + let { printed } = lowerAndOptimize("function f() { let a = [1, , 3]; return a[1]; }"); + assertContains(printed, "make_array"); +}); + +test("optimize: out-of-range array read keeps the array", () => { + let { printed } = lowerAndOptimize("function f() { let a = [1]; return a[5]; }"); + assertContains(printed, "make_array"); +}); + +test("optimize: computed non-const array read keeps the array", () => { + let { printed } = lowerAndOptimize("function f(i) { let a = [1, 2]; return a[i]; }"); + assertContains(printed, "make_array"); +}); + +test("optimize: array method call keeps the array", () => { + let { printed } = lowerAndOptimize("function f() { let a = [1, 2]; return a.join(','); }"); + assertContains(printed, "make_array"); +}); + +test("optimize: nested literal sinks once the outer one dies", () => { + let { printed } = lowerAndOptimize( + "function f() { let o = { inner: { x: 7 } }; return o.inner.x; }" + ); + assertNotContains(printed, "make_object"); +}); + +test("optimize: object flowing into a block param is an escape", () => { + let { printed } = lowerAndOptimize( + "function f(c) { let o = c ? { a: 1 } : { a: 2 }; return o.a; }" + ); + assertContains(printed, "make_object"); +}); + +test("optimize: reads inside try (unwind targets) are left alone", () => { + let { printed } = lowerAndOptimize( + "function f() { let o = { a: 1 }; try { return o.a; } catch (e) { return 0; } }" + ); + assertContains(printed, "make_object"); + assertContains(printed, "get_prop_atom"); +}); + +test("optimize: DCE removes unused pure chains but keeps effects", () => { + let { printed } = lowerAndOptimize( + "function f(x) { let unused = { a: 1 }; let kept = x.y; return 5; }" + ); + assertNotContains(printed, "make_object"); + // x.y may have observable effects (getter) and must survive + assertContains(printed, "get_prop_atom"); +}); + // -------------------------------------------------------------------------------- if (failures > 0) { From 41dccc8c263fd5996be3ca917ba14a69fb8c31f1 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 22:30:58 -0700 Subject: [PATCH 076/146] eir: direct IIFE inlining + env scalar replacement MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The pass that makes allocation sinking fire on real code. The desugars (destructuring especially) wrap expression-position work in immediately-called closures, so the dominant shape is make_env / env_store / make_closure / call — the literals live inside the callee. Inlining contract, deliberately narrow: the callee is a single block ending in return, contains no frame-dependent ops (args_obj, rest_args, new_target, construct_super*), never reads its %this param, and the call carries no unwind targets. Params map [%env, %this, args...] -> [closure's env operand, call's this, call args], missing args become undefined. Env scalar replacement: a make_env whose uses are all base-position env_load/env_store in its own block resolves by a linear walk — each load sees the latest store to its slot (or undefined; env slots start undefined, echojs has no TDZ). Parent-env chaining stores the env in a value position, which classifies as an escape. The passes iterate to fixpoint: inline exposes the env and literals, DCE kills the closure, the env dissolves, then the literals sink. Net effect: [a, b] = [b, a] compiles to pure SSA — no closure, no env, no array. Real-pipeline measurement on test/eir-destructure1.js: 3 calls inlined, 2 allocs sunk, 11 reads folded, 123 dead insts. 79 EIR unit tests green; full bootstrap matrix green including stage2/stage3 byte-identity — the compiler self-hosts with the optimizer rewriting its own code. Co-Authored-By: Claude Fable 5 --- lib/eir/integrate.ts | 7 +- lib/eir/optimize.ts | 188 +++++++++++++++++++++++++++++++++++++++++-- lib/eir/tests.ts | 55 +++++++++++++ 3 files changed, 240 insertions(+), 10 deletions(-) diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 78c731b0..964efa53 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -397,11 +397,12 @@ export function collectEIRToplevel( if (options.opt_level > 0) { const stats = optimizeModule(eir_module); - if (stats.allocs_sunk || stats.reads_folded || stats.dead_removed) + if (stats.allocs_sunk || stats.reads_folded || stats.calls_inlined || stats.dead_removed) debug.log( 1, - `EIR-opt: ${filename}: ${stats.allocs_sunk} alloc(s) sunk, ` + - `${stats.reads_folded} read(s) folded, ${stats.dead_removed} dead inst(s) removed` + `EIR-opt: ${filename}: ${stats.calls_inlined} call(s) inlined, ` + + `${stats.allocs_sunk} alloc(s) sunk, ${stats.reads_folded} read(s) folded, ` + + `${stats.dead_removed} dead inst(s) removed` ); verifyModule(eir_module); if (dumpOptRequested(options)) dumpModule(filename, "optimized", eir_module); diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 20d67564..9ac73cff 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -26,9 +26,14 @@ import { Effect, opInfo } from "./ops"; export interface OptStats { allocs_sunk: number; reads_folded: number; + calls_inlined: number; dead_removed: number; } +function newStats(): OptStats { + return { allocs_sunk: 0, reads_folded: 0, calls_inlined: 0, dead_removed: 0 }; +} + // uses of `value` within fn, with enough position info to classify interface Use { inst: Inst; @@ -226,6 +231,171 @@ function sinkAllocations(fn: Func, stats: OptStats): boolean { return changed; } +// --- direct IIFE inlining ------------------------------------------------------ + +// the desugars (destructuring especially) wrap expression-position work +// in immediately-called closures: make_env / env_store / make_closure / +// call. inlining the call is what exposes the env and the literals +// inside it to the sinking passes above. +// +// conservatively inlinable callee: a single block ending in `return`, +// no frame-dependent ops (arguments/rest/new.target/super), and an +// unused %this param (the IIFE arrows never touch it — lexical `this` +// rides in the env). the call itself must carry no unwind targets. + +const FRAME_OPS = new Set([ + "args_obj", + "rest_args", + "new_target", + "construct_super", + "construct_super_apply", +]); + +const INLINE_MAX_INSTS = 40; + +function inlinableCallee(m: Module, caller: Func, closure: Inst): Func | null { + const name = closure.imms.fn as string; + const callee = m.functions.find((f) => f.name === name); + if (!callee || callee === caller) return null; + if (callee.blocks.length !== 1) return null; + const entry = callee.entry!; + if (entry.insts.length > INLINE_MAX_INSTS) return null; + const term = entry.terminator; + if (!term || term.op !== "return") return null; + for (const inst of entry.insts) { + if (FRAME_OPS.has(inst.op)) return null; + if (inst.targets && inst !== term) return null; + } + // %this must be unused (we'd otherwise have to reason about the + // runtime's this-coercion on the call path we're deleting) + const thisParam = entry.params[1]; + if (thisParam) { + for (const inst of entry.insts) { + for (const o of inst.operands) if (o === thisParam) return null; + } + } + return callee; +} + +function constUndefinedBefore(fn: Func, before: Inst): Inst { + const c = new Inst(fn, "const", [], { kind: "undefined" }); + const b = before.block!; + c.block = b; + b.insts.splice(b.insts.indexOf(before), 0, c); + return c; +} + +// inline `call` (operands [closure, this, ...args]) by cloning the +// callee's single block in front of it +function inlineCall(fn: Func, call: Inst, closure: Inst, callee: Func): void { + const entry = callee.entry!; + const subst = new Map(); + + // params: [%env, %this, ...declared] -> [closure env, call this, args] + for (let i = 0; i < entry.params.length; i++) { + const p = entry.params[i]!; + let v: Inst; + if (i === 0) v = closure.operands[0]!; + else if (i < call.operands.length) v = call.operands[i]!; + else v = constUndefinedBefore(fn, call); + subst.set(p, v); + } + + const map = (v: Inst): Inst => subst.get(v) || v; + const block = call.block!; + let at = block.insts.indexOf(call); + let result: Inst | null = null; + for (const inst of entry.insts) { + if (inst === entry.terminator) { + result = map(inst.operands[0]!); + break; + } + const clone = new Inst(fn, inst.op, inst.operands.map(map), { ...inst.imms }); + clone.block = block; + block.insts.splice(at++, 0, clone); + subst.set(inst, clone); + } + replaceAllUses(fn, call, result!); + removeInst(call); +} + +function inlineDirectCalls(m: Module, fn: Func, stats: OptStats): boolean { + const candidates: { call: Inst; closure: Inst; callee: Func }[] = []; + fn.forEachInst((inst) => { + if (inst.op !== "call" || inst.imms.direct || (inst.targets && inst.targets.length > 0)) + return; + const closure = inst.operands[0]!; + if (closure.op !== "make_closure" || closure.block === null) return; + const callee = inlinableCallee(m, fn, closure); + if (callee) candidates.push({ call: inst, closure, callee }); + }); + for (const c of candidates) { + inlineCall(fn, c.call, c.closure, c.callee); + stats.calls_inlined++; + } + return candidates.length > 0; +} + +// --- env scalar replacement ----------------------------------------------------- + +// a make_env whose only uses are base-position env_load/env_store, all +// in the block that allocated it, resolves by a linear walk: each load +// sees the most recent store to its slot (or undefined — env slots +// start undefined, echojs has no TDZ). parent-env chaining stores the +// env in a VALUE position, which classifies as an escape below. +function scalarReplaceEnvs(fn: Func, stats: OptStats): boolean { + let changed = false; + const candidates: Inst[] = []; + fn.forEachInst((inst) => { + if (inst.op === "make_env") candidates.push(inst); + }); + + for (const env of candidates) { + if (!env.block) continue; + let ok = true; + for (const use of usesOf(fn, env)) { + const { inst, index } = use; + const local = + index === 0 && + (inst.op === "env_load" || inst.op === "env_store") && + inst.block === env.block; + if (!local) { + ok = false; + break; + } + } + if (!ok) continue; + + // linear walk of the defining block. replacements materialize + // after the walk — inserting into insts mid-iteration would + // shift the very array being walked. + const slotValues = new Map(); + const loads: [Inst, Inst | null][] = []; // load -> replacement (null = undefined) + const stores: Inst[] = []; + let started = false; + for (const inst of env.block.insts) { + if (inst === env) { + started = true; + continue; + } + if (!started || inst.operands[0] !== env) continue; + if (inst.op === "env_store") { + slotValues.set(inst.imms.slot as number, inst.operands[1]!); + stores.push(inst); + } else if (inst.op === "env_load") { + loads.push([inst, slotValues.get(inst.imms.slot as number) || null]); + } + } + for (const [load, v] of loads) foldRead(fn, load, v || constUndefinedBefore(fn, load)); + for (const s of stores) removeInst(s); + removeInst(env); + stats.allocs_sunk++; + stats.reads_folded += loads.length; + changed = true; + } + return changed; +} + // --- dead instruction elimination -------------------------------------------- // dead-removable: unused results whose computation is unobservable. @@ -275,13 +445,17 @@ function eliminateDead(fn: Func, stats: OptStats): boolean { // --- driver ------------------------------------------------------------------- -export function optimizeFunction(fn: Func, stats?: OptStats): OptStats { - const s = stats || { allocs_sunk: 0, reads_folded: 0, dead_removed: 0 }; - // to fixpoint: sinking an outer literal can un-escape one nested - // inside it (its only use was as the outer's operand) +export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): OptStats { + const s = stats || newStats(); + // to fixpoint: inlining an IIFE exposes its env and literals; + // sinking an outer literal can un-escape one nested inside it (its + // only use was as the outer's operand) let rounds = 0; for (;;) { - let changed = sinkAllocations(fn, s); + let changed = module ? inlineDirectCalls(module, fn, s) : false; + if (eliminateDead(fn, s)) changed = true; // kill the closure before judging its env + if (scalarReplaceEnvs(fn, s)) changed = true; + if (sinkAllocations(fn, s)) changed = true; if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; } @@ -289,7 +463,7 @@ export function optimizeFunction(fn: Func, stats?: OptStats): OptStats { } export function optimizeModule(m: Module): OptStats { - const stats: OptStats = { allocs_sunk: 0, reads_folded: 0, dead_removed: 0 }; - for (const fn of m.functions) optimizeFunction(fn, stats); + const stats = newStats(); + for (const fn of m.functions) optimizeFunction(fn, m, stats); return stats; } diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 08c8666f..72d11bb1 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -912,6 +912,61 @@ test("optimize: reads inside try (unwind targets) are left alone", () => { assertContains(printed, "get_prop_atom"); }); +test("optimize: single-block IIFE inlines and its env scalar-replaces", () => { + let { module, fn } = lowerOne( + "function f(x) { let r = ((a) => a + 1)(x); return r; }" + ); + optimizeFunction(fn, module); + verifyFunction(fn); + let printed = printFunction(fn); + assertNotContains(printed, "make_closure"); + assertNotContains(printed, "call"); + assertContains(printed, "add"); +}); + +test("optimize: escaping closure is not inlined", () => { + let { module, fn } = lowerOne( + "function f(g) { let h = (a) => a + 1; g(h); return h(2); }" + ); + optimizeFunction(fn, module); + verifyFunction(fn); + assertContains(printFunction(fn), "make_closure"); +}); + +test("optimize: same-block env with loads and stores scalar-replaces", () => { + // the arrow captures x, forcing x into an env; after inlining, the + // env ops are all in one block and dissolve + let { module, fn } = lowerOne( + "function f(x) { let get = () => x; return get(); }" + ); + optimizeFunction(fn, module); + verifyFunction(fn); + let printed = printFunction(fn); + assertNotContains(printed, "make_env"); + assertNotContains(printed, "env_load"); + assertNotContains(printed, "call"); +}); + +test("optimize: destructuring swap dissolves to pure SSA", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(a, b) { [a, b] = [b, a]; return a - b; }") + ); + optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + let printed = printFunction(r.fn); + assertNotContains(printed, "make_env"); + assertNotContains(printed, "make_closure"); +}); + +test("optimize: env read from a later block is left alone", () => { + // the loop body reads the env across blocks: not same-block, no sink + let { module, fn } = lowerOne( + "function f(x, n) { let get = () => x; while (n) { n = n - get(); } return n; }" + ); + optimizeFunction(fn, module); + verifyFunction(fn); +}); + test("optimize: DCE removes unused pure chains but keeps effects", () => { let { printed } = lowerAndOptimize( "function f(x) { let unused = { a: 1 }; let kept = x.y; return 5; }" From c3362735e00e08eab18083c10dc8d7e980be19aa Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 22:35:55 -0700 Subject: [PATCH 077/146] eir: dump the as-lowered module before the optimizer mutates it --dump-after eir printed after optimizeModule ran, so both it and --dump-after eir-opt showed the optimized IR. Co-Authored-By: Claude Fable 5 --- lib/eir/integrate.ts | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 964efa53..6717d79b 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -394,6 +394,9 @@ export function collectEIRToplevel( lowerAnalyzedFunction(info, analysis, eir_module, mod_ctx); let accessors = buildModuleAccessors(eir_module, this_module_info); verifyModule(eir_module); + // the as-lowered dump must precede optimization (which mutates + // the module in place) + if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); if (options.opt_level > 0) { const stats = optimizeModule(eir_module); @@ -412,7 +415,6 @@ export function collectEIRToplevel( toplevel.eir_main = info.name; toplevel.body = { type: "BlockStatement", body: [], loc: toplevel.loc }; debug.log(1, `EIR: ${filename}: whole module lowered (toplevel-as-EIR)`); - if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); return { eir_module: eir_module, accessors: accessors }; } catch (e) { if (!isLowerNotSupported(e)) throw e; From a45bc8a6b56809d01ed17968fd67f6187bf5457a Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 22:37:35 -0700 Subject: [PATCH 078/146] eir: state precisely what the swap-idiom optimization achieves MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The IIFE, env, and closure dissolve; the array still escapes into the iterator protocol (Symbol.iterator + iterator_wrapper_new). The prior commit's message overstated this as fully pure SSA — folding the iterator walk over a literal array is the %createIteratorWrapper peephole, queued as future work. Co-Authored-By: Claude Fable 5 --- lib/eir/tests.ts | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 72d11bb1..777b0ecc 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -947,7 +947,7 @@ test("optimize: same-block env with loads and stores scalar-replaces", () => { assertNotContains(printed, "call"); }); -test("optimize: destructuring swap dissolves to pure SSA", () => { +test("optimize: destructuring swap sheds its IIFE, env, and closure", () => { let r = lowerFunctionNode( parseFnPreEIR("function f(a, b) { [a, b] = [b, a]; return a - b; }") ); @@ -956,6 +956,11 @@ test("optimize: destructuring swap dissolves to pure SSA", () => { let printed = printFunction(r.fn); assertNotContains(printed, "make_env"); assertNotContains(printed, "make_closure"); + // the array itself still escapes into the iterator protocol + // (Symbol.iterator lookup + iterator_wrapper_new); folding that is + // the %createIteratorWrapper-over-make_array peephole, future work + assertContains(printed, "make_array"); + assertContains(printed, 'name="iterator_wrapper_new"'); }); test("optimize: env read from a later block is left alone", () => { From b4682b1429a456a6ecccdcc178b27feb44750778 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 10 Jul 2026 22:57:07 -0700 Subject: [PATCH 079/146] eir: fold the iterator-protocol walk over dense array literals MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Array destructuring desugars to Symbol.iterator lookup + call + iterator_wrapper_new + N getNextValue calls. Over a dense array literal the whole chain is compile-time constant: the k-th getNextValue call folds to the k-th element (undefined past the end, matching the array iterator), and the recognized chain is removed instruction by instruction. The array itself then dies through the existing sinking pass and DCE. Use discipline is strict — every link must be consumed only by the next, all getNextValue calls in the wrapper's own block, nothing carrying unwind targets. A getRest use (rest patterns), a second use of the array, a non-literal RHS, or a holey literal (a hole would read through the prototype chain) fails the match and keeps the runtime walk. Semantics note: the fold assumes the built-in global Symbol and Array.prototype[Symbol.iterator]. The desugar already bakes in the former by emitting get_global "Symbol"; a program that patches the array iterator and destructures a *literal* array would observe the difference. Same assumption class the desugar itself lives in. With this, `[a, b] = [b, a]` genuinely compiles to pure SSA — no closure, no env, no array, no calls. 83 EIR unit tests green; full bootstrap matrix green including stage2/stage3 byte-identity. Co-Authored-By: Claude Fable 5 --- lib/eir/integrate.ts | 9 +++- lib/eir/optimize.ts | 113 ++++++++++++++++++++++++++++++++++++++++++- lib/eir/tests.ts | 48 +++++++++++++++--- 3 files changed, 162 insertions(+), 8 deletions(-) diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 6717d79b..32e41dc8 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -400,11 +400,18 @@ export function collectEIRToplevel( if (options.opt_level > 0) { const stats = optimizeModule(eir_module); - if (stats.allocs_sunk || stats.reads_folded || stats.calls_inlined || stats.dead_removed) + if ( + stats.allocs_sunk || + stats.reads_folded || + stats.calls_inlined || + stats.iters_folded || + stats.dead_removed + ) debug.log( 1, `EIR-opt: ${filename}: ${stats.calls_inlined} call(s) inlined, ` + `${stats.allocs_sunk} alloc(s) sunk, ${stats.reads_folded} read(s) folded, ` + + `${stats.iters_folded} iterator walk(s) folded, ` + `${stats.dead_removed} dead inst(s) removed` ); verifyModule(eir_module); diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 9ac73cff..2ae76210 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -27,11 +27,12 @@ export interface OptStats { allocs_sunk: number; reads_folded: number; calls_inlined: number; + iters_folded: number; dead_removed: number; } function newStats(): OptStats { - return { allocs_sunk: 0, reads_folded: 0, calls_inlined: 0, dead_removed: 0 }; + return { allocs_sunk: 0, reads_folded: 0, calls_inlined: 0, iters_folded: 0, dead_removed: 0 }; } // uses of `value` within fn, with enough position info to classify @@ -396,6 +397,115 @@ function scalarReplaceEnvs(fn: Func, stats: OptStats): boolean { return changed; } +// --- iterator-protocol peephole ------------------------------------------------- + +// array destructuring desugars to an iterator walk; over a dense array +// literal the whole chain is compile-time constant: +// +// %a = make_array e0, e1, ... +// %s = get_global atom="Symbol" +// %i = get_prop_atom %s, atom="iterator" +// %f = get_prop %a, %i +// %t = call %f, %a +// %w = call_runtime %t, name="iterator_wrapper_new" +// %g = get_prop_atom %w, atom="getNextValue" +// %v = call %g, %w ; k-th call = element k +// +// the k-th getNextValue call folds to the k-th element (undefined past +// the end — the array iterator yields undefined there). the fold +// assumes the built-in Symbol global and Array.prototype[Symbol.iterator] +// (the desugar already bakes in the former by emitting get_global). +// dense literals only: a hole would read through the prototype chain. +// +// use discipline is strict — every link is consumed only by the next +// (a getRest, an extra array use, a cross-block call, or anything +// carrying unwind targets fails the match), so rest patterns and +// escaping arrays keep the runtime walk. +function foldIteratorWrappers(fn: Func, stats: OptStats): boolean { + let changed = false; + const wrappers: Inst[] = []; + fn.forEachInst((inst) => { + if (inst.op === "call_runtime" && inst.imms.name === "iterator_wrapper_new") + wrappers.push(inst); + }); + + const hasTargets = (i: Inst) => i.targets !== null && i.targets.length > 0; + const soleUse = (v: Inst, user: Inst) => { + const u = usesOf(fn, v); + return u.length === 1 && u[0]!.inst === user; + }; + + for (const w of wrappers) { + if (!w.block || hasTargets(w)) continue; + + // match the creation chain backwards + const it = w.operands[0]!; + if (it.op !== "call" || it.operands.length !== 2 || it.imms.direct || hasTargets(it)) + continue; + const itfn = it.operands[0]!; + const arr = it.operands[1]!; + if (itfn.op !== "get_prop" || itfn.operands[0] !== arr || hasTargets(itfn)) continue; + const symprop = itfn.operands[1]!; + if (symprop.op !== "get_prop_atom" || symprop.imms.atom !== "iterator" || hasTargets(symprop)) + continue; + const symGlobal = symprop.operands[0]!; + if (symGlobal.op !== "get_global" || symGlobal.imms.atom !== "Symbol") continue; + if (arr.op !== "make_array" || arr.imms.len !== undefined) continue; + if (!soleUse(it, w) || !soleUse(itfn, it) || !soleUse(symprop, itfn)) continue; + if (!usesOf(fn, arr).every((u) => (u.inst === itfn && u.index === 0) || (u.inst === it && u.index === 1))) + continue; + + // wrapper uses: getNextValue getters + their calls, nothing else + const getters = new Set(); + const calls: Inst[] = []; + let ok = true; + for (const u of usesOf(fn, w)) { + const i = u.inst; + if ( + i.op === "get_prop_atom" && + i.imms.atom === "getNextValue" && + u.index === 0 && + !hasTargets(i) + ) { + getters.add(i); + } else if ( + i.op === "call" && + i.operands.length === 2 && + u.index === 1 && + !i.imms.direct && + !hasTargets(i) && + i.block === w.block + ) { + calls.push(i); + } else { + ok = false; + break; + } + } + if (!ok || calls.length !== getters.size) continue; + for (const c of calls) if (!getters.has(c.operands[0]!) || !soleUse(c.operands[0]!, c)) ok = false; + if (!ok) continue; + + // k-th call in block order sees element k + calls.sort((a, b) => w.block!.insts.indexOf(a) - w.block!.insts.indexOf(b)); + for (let k = 0; k < calls.length; k++) { + const el = k < arr.operands.length ? arr.operands[k]! : constUndefinedBefore(fn, calls[k]!); + foldRead(fn, calls[k]!, el); + } + for (const g of getters) removeInst(g); + removeInst(w); + removeInst(it); + removeInst(itfn); + if (soleUse(symGlobal, symprop)) removeInst(symGlobal); + removeInst(symprop); + // the array itself is now unused (or write-only) — the sinking + // pass and DCE finish it off + stats.iters_folded++; + changed = true; + } + return changed; +} + // --- dead instruction elimination -------------------------------------------- // dead-removable: unused results whose computation is unobservable. @@ -455,6 +565,7 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O let changed = module ? inlineDirectCalls(module, fn, s) : false; if (eliminateDead(fn, s)) changed = true; // kill the closure before judging its env if (scalarReplaceEnvs(fn, s)) changed = true; + if (foldIteratorWrappers(fn, s)) changed = true; if (sinkAllocations(fn, s)) changed = true; if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 777b0ecc..c996c926 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -947,7 +947,7 @@ test("optimize: same-block env with loads and stores scalar-replaces", () => { assertNotContains(printed, "call"); }); -test("optimize: destructuring swap sheds its IIFE, env, and closure", () => { +test("optimize: destructuring swap dissolves to pure SSA", () => { let r = lowerFunctionNode( parseFnPreEIR("function f(a, b) { [a, b] = [b, a]; return a - b; }") ); @@ -956,11 +956,47 @@ test("optimize: destructuring swap sheds its IIFE, env, and closure", () => { let printed = printFunction(r.fn); assertNotContains(printed, "make_env"); assertNotContains(printed, "make_closure"); - // the array itself still escapes into the iterator protocol - // (Symbol.iterator lookup + iterator_wrapper_new); folding that is - // the %createIteratorWrapper-over-make_array peephole, future work - assertContains(printed, "make_array"); - assertContains(printed, 'name="iterator_wrapper_new"'); + assertNotContains(printed, "make_array"); + assertNotContains(printed, "iterator_wrapper_new"); + assertNotContains(printed, "call"); +}); + +test("optimize: iterator walk over a literal folds, short RHS pads undefined", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(x) { let [a, b, c] = [x, 2]; return [a, b, c].length && a + b + (c === undefined); }") + ); + optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + let printed = printFunction(r.fn); + assertNotContains(printed, "iterator_wrapper_new"); + assertNotContains(printed, 'atom="getNextValue"'); +}); + +test("optimize: iterator walk over a non-literal keeps the runtime protocol", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(xs) { let [a, b] = xs; return a + b; }") + ); + optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + assertContains(printFunction(r.fn), 'name="iterator_wrapper_new"'); +}); + +test("optimize: rest pattern (getRest) keeps the runtime protocol", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(x, y) { let [a, ...rest] = [x, y, 3]; return a + rest.length; }") + ); + optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + assertContains(printFunction(r.fn), 'name="iterator_wrapper_new"'); +}); + +test("optimize: array with another use keeps the iterator walk", () => { + let r = lowerFunctionNode( + parseFnPreEIR("function f(x, y) { let arr = [x, y]; let [a] = arr; return a + arr.length; }") + ); + optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + assertContains(printFunction(r.fn), 'name="iterator_wrapper_new"'); }); test("optimize: env read from a later block is left alone", () => { From 5f350973f44fb7de0a90ff66dd7665226299ecf4 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 11 Jul 2026 12:13:47 -0700 Subject: [PATCH 080/146] eir: EJS_NO_EIR_OPT hook; allocation-lean use tracking in the optimizer MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit EJS_NO_EIR_OPT=1 disables the EIR optimizer without touching the LLVM pass pipeline (-O0 changes both), mirroring the EJS_NO_PROMOTE bisect hook. Added to answer "what does the pass cost during bootstrap" — findings below. The use tracking is reworked from per-query full-function scans to one scan per fixpoint round, shared by the sinking/env/iterator passes and kept accurate by the mutation helpers, with plain arrays indexed by inst.id instead of Maps (dead-code counts likewise). This matters because the optimizer runs under the echojs runtime during self-compiles, where Map traffic and allocation churn cost far more than under V8. Measured (stage1 self-compile of the compiler, arm64 mac): - EIR-opt off: ~37.6s on: ~44.1s (stable +-0.5 over 4 runs) - node-hosted stage0, same srcdir compile: 5.32s off / 5.40s on - single 7k-line module (esprima): 1.04s off / 0.89s on — the dead-code removal (4208 insts across the compiler) saves LLVM more than the pass costs The ~6.5s self-compile delta is therefore not algorithmic: it is the echojs-compiled optimizer executing ~60x slower than the same JS under V8 — data-structure-heavy code is a worst case for generic runtime ops. The number shrinks as the runtime improves (typed ops, GC); meanwhile the hook gives an escape hatch and a benchmark. Firing profile on the compiler's own 60 modules: 32 IIFEs inlined, 5 allocs sunk, 2 reads folded, 0 iterator walks (the compiler destructures function results and map entries, not literals), 4208 dead insts removed. Full bootstrap matrix green including stage2/stage3 byte-identity. Co-Authored-By: Claude Fable 5 --- lib/eir/integrate.ts | 5 +- lib/eir/optimize.ts | 142 +++++++++++++++++++++++++++---------------- 2 files changed, 93 insertions(+), 54 deletions(-) diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 32e41dc8..8426f6d7 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -398,7 +398,10 @@ export function collectEIRToplevel( // the module in place) if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); - if (options.opt_level > 0) { + // debugging/measurement: EJS_NO_EIR_OPT=1 disables the EIR + // optimizer without touching the LLVM pass pipeline (-O0 changes + // both), mirroring the EJS_NO_PROMOTE bisect hook + if (options.opt_level > 0 && !process.env["EJS_NO_EIR_OPT"]) { const stats = optimizeModule(eir_module); if ( stats.allocs_sunk || diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 2ae76210..d9a40250 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -42,28 +42,46 @@ interface Use { index: number; } -function usesOf(fn: Func, value: Inst): Use[] { - const uses: Use[] = []; +// one full-function scan per fixpoint round, shared by every pass in +// the round; the mutation helpers below keep it accurate. storage is a +// plain array indexed by inst.id (dense per-function) — this code runs +// under the echojs runtime during self-compiles, where Map traffic and +// allocation churn are far more expensive than under V8. +const EMPTY_USES: Use[] = []; + +type UseMap = (Use[] | undefined)[]; + +function buildUseMap(fn: Func): UseMap { + const map: UseMap = new Array(fn.next_value_id); + const add = (v: Inst, inst: Inst, index: number) => { + const list = map[v.id]; + if (list) list.push({ inst, index }); + else map[v.id] = [{ inst, index }]; + }; fn.forEachInst((inst) => { - for (let i = 0; i < inst.operands.length; i++) { - if (inst.operands[i] === value) uses.push({ inst, index: i }); - } + for (let i = 0; i < inst.operands.length; i++) add(inst.operands[i]!, inst, i); if (inst.targets) { - for (const t of inst.targets) { - for (const a of t.args) { - if (a === value) uses.push({ inst, index: -1 }); - } - } + for (const t of inst.targets) for (const a of t.args) if (a) add(a, inst, -1); } }); - return uses; + return map; +} + +function usesOf(uses: UseMap, value: Inst): Use[] { + return uses[value.id] || EMPTY_USES; } -function removeInst(inst: Inst): void { +function removeInst(uses: UseMap, inst: Inst): void { const b = inst.block!; const idx = b.insts.indexOf(inst); if (idx >= 0) b.insts.splice(idx, 1); inst.block = null; + // inst no longer uses its operands + for (const o of inst.operands) { + const list = uses[o.id]; + if (list) uses[o.id] = list.filter((u) => u.inst !== inst); + } + uses[inst.id] = undefined; } // --- allocation sinking ---------------------------------------------------- @@ -84,9 +102,9 @@ interface AllocUses { // (call/return/throw operands, edge arguments, value or key positions, // computed sets — whose key evaluation we must not disturb — accessor // defines, deletes) escapes. -function classifyUses(fn: Func, alloc: Inst): AllocUses { +function classifyUses(uses: UseMap, alloc: Inst): AllocUses { const r: AllocUses = { atomReads: [], atomWrites: [], computedReads: [], escapes: false }; - for (const use of usesOf(fn, alloc)) { + for (const use of usesOf(uses, alloc)) { const { inst, index } = use; if (index === -1) { r.escapes = true; // flows into a block param @@ -136,9 +154,16 @@ function arrayLength(alloc: Inst): number { // fold a read to `value`: all the read's uses see the value directly, // and the read disappears. only for target-less reads — a read with // unwind targets terminates its block and can't simply vanish. -function foldRead(fn: Func, read: Inst, value: Inst): void { +function foldRead(uses: UseMap, fn: Func, read: Inst, value: Inst): void { replaceAllUses(fn, read, value); - removeInst(read); + const inherited = uses[read.id]; + if (inherited && inherited.length > 0) { + const list = uses[value.id]; + if (list) list.push(...inherited); + else uses[value.id] = inherited.slice(); + } + uses[read.id] = undefined; + removeInst(uses, read); } // materialize a `const` number in front of `before` (for .length folds) @@ -151,9 +176,9 @@ function constNumberBefore(fn: Func, before: Inst, value: number): Inst { } // try to scalar-replace one allocation. returns true if anything changed. -function sinkAlloc(fn: Func, alloc: Inst, stats: OptStats): boolean { +function sinkAlloc(useMap: UseMap, fn: Func, alloc: Inst, stats: OptStats): boolean { const isArray = alloc.op === "make_array"; - const uses = classifyUses(fn, alloc); + const uses = classifyUses(useMap, alloc); if (uses.escapes) return false; let changed = false; @@ -167,7 +192,7 @@ function sinkAlloc(fn: Func, alloc: Inst, stats: OptStats): boolean { for (const read of uses.atomReads) { if (read.targets) continue; if ((read.imms.atom as string) !== "length") continue; // prototype read - foldRead(fn, read, constNumberBefore(fn, read, arrayLength(alloc))); + foldRead(useMap, fn, read, constNumberBefore(fn, read, arrayLength(alloc))); stats.reads_folded++; changed = true; } @@ -177,7 +202,7 @@ function sinkAlloc(fn: Func, alloc: Inst, stats: OptStats): boolean { if (key.op !== "const" || key.imms.kind !== "number") continue; const el = ownArrayElement(alloc, key.imms.value as number); if (!el) continue; // hole or out of range: prototype read - foldRead(fn, read, el); + foldRead(useMap, fn, read, el); stats.reads_folded++; changed = true; } @@ -189,7 +214,7 @@ function sinkAlloc(fn: Func, alloc: Inst, stats: OptStats): boolean { if (writtenAtoms.has(atom)) continue; // flow-sensitive: not yet const v = ownObjectValue(alloc, atom); if (!v) continue; // not an own key: prototype read - foldRead(fn, read, v); + foldRead(useMap, fn, read, v); stats.reads_folded++; changed = true; } @@ -204,22 +229,22 @@ function sinkAlloc(fn: Func, alloc: Inst, stats: OptStats): boolean { isArray ? (w.imms.atom as string) === "length" : ownObjectValue(alloc, w.imms.atom as string) !== null; - const remaining = classifyUses(fn, alloc); + const remaining = classifyUses(useMap, alloc); if ( !remaining.escapes && remaining.atomReads.length === 0 && remaining.computedReads.length === 0 && remaining.atomWrites.every((w) => !w.targets && ownWrite(w)) ) { - for (const w of remaining.atomWrites) removeInst(w); - removeInst(alloc); + for (const w of remaining.atomWrites) removeInst(useMap, w); + removeInst(useMap, alloc); stats.allocs_sunk++; changed = true; } return changed; } -function sinkAllocations(fn: Func, stats: OptStats): boolean { +function sinkAllocations(useMap: UseMap, fn: Func, stats: OptStats): boolean { const candidates: Inst[] = []; fn.forEachInst((inst) => { if (inst.op === "make_object" || inst.op === "make_array") candidates.push(inst); @@ -227,7 +252,7 @@ function sinkAllocations(fn: Func, stats: OptStats): boolean { let changed = false; for (const c of candidates) { if (!c.block) continue; // removed by an earlier candidate's fold - if (sinkAlloc(fn, c, stats)) changed = true; + if (sinkAlloc(useMap, fn, c, stats)) changed = true; } return changed; } @@ -317,7 +342,12 @@ function inlineCall(fn: Func, call: Inst, closure: Inst, callee: Func): void { subst.set(inst, clone); } replaceAllUses(fn, call, result!); - removeInst(call); + // no live use map here — inlineDirectCalls rebuilds nothing; the + // subsequent passes each build their own + const b = call.block!; + const idx = b.insts.indexOf(call); + if (idx >= 0) b.insts.splice(idx, 1); + call.block = null; } function inlineDirectCalls(m: Module, fn: Func, stats: OptStats): boolean { @@ -344,7 +374,7 @@ function inlineDirectCalls(m: Module, fn: Func, stats: OptStats): boolean { // sees the most recent store to its slot (or undefined — env slots // start undefined, echojs has no TDZ). parent-env chaining stores the // env in a VALUE position, which classifies as an escape below. -function scalarReplaceEnvs(fn: Func, stats: OptStats): boolean { +function scalarReplaceEnvs(useMap: UseMap, fn: Func, stats: OptStats): boolean { let changed = false; const candidates: Inst[] = []; fn.forEachInst((inst) => { @@ -354,7 +384,7 @@ function scalarReplaceEnvs(fn: Func, stats: OptStats): boolean { for (const env of candidates) { if (!env.block) continue; let ok = true; - for (const use of usesOf(fn, env)) { + for (const use of usesOf(useMap, env)) { const { inst, index } = use; const local = index === 0 && @@ -387,9 +417,9 @@ function scalarReplaceEnvs(fn: Func, stats: OptStats): boolean { loads.push([inst, slotValues.get(inst.imms.slot as number) || null]); } } - for (const [load, v] of loads) foldRead(fn, load, v || constUndefinedBefore(fn, load)); - for (const s of stores) removeInst(s); - removeInst(env); + for (const [load, v] of loads) foldRead(useMap, fn, load, v || constUndefinedBefore(fn, load)); + for (const s of stores) removeInst(useMap, s); + removeInst(useMap, env); stats.allocs_sunk++; stats.reads_folded += loads.length; changed = true; @@ -421,7 +451,7 @@ function scalarReplaceEnvs(fn: Func, stats: OptStats): boolean { // (a getRest, an extra array use, a cross-block call, or anything // carrying unwind targets fails the match), so rest patterns and // escaping arrays keep the runtime walk. -function foldIteratorWrappers(fn: Func, stats: OptStats): boolean { +function foldIteratorWrappers(useMap: UseMap, fn: Func, stats: OptStats): boolean { let changed = false; const wrappers: Inst[] = []; fn.forEachInst((inst) => { @@ -431,7 +461,7 @@ function foldIteratorWrappers(fn: Func, stats: OptStats): boolean { const hasTargets = (i: Inst) => i.targets !== null && i.targets.length > 0; const soleUse = (v: Inst, user: Inst) => { - const u = usesOf(fn, v); + const u = usesOf(useMap, v); return u.length === 1 && u[0]!.inst === user; }; @@ -452,14 +482,14 @@ function foldIteratorWrappers(fn: Func, stats: OptStats): boolean { if (symGlobal.op !== "get_global" || symGlobal.imms.atom !== "Symbol") continue; if (arr.op !== "make_array" || arr.imms.len !== undefined) continue; if (!soleUse(it, w) || !soleUse(itfn, it) || !soleUse(symprop, itfn)) continue; - if (!usesOf(fn, arr).every((u) => (u.inst === itfn && u.index === 0) || (u.inst === it && u.index === 1))) + if (!usesOf(useMap, arr).every((u) => (u.inst === itfn && u.index === 0) || (u.inst === it && u.index === 1))) continue; // wrapper uses: getNextValue getters + their calls, nothing else const getters = new Set(); const calls: Inst[] = []; let ok = true; - for (const u of usesOf(fn, w)) { + for (const u of usesOf(useMap, w)) { const i = u.inst; if ( i.op === "get_prop_atom" && @@ -490,14 +520,14 @@ function foldIteratorWrappers(fn: Func, stats: OptStats): boolean { calls.sort((a, b) => w.block!.insts.indexOf(a) - w.block!.insts.indexOf(b)); for (let k = 0; k < calls.length; k++) { const el = k < arr.operands.length ? arr.operands[k]! : constUndefinedBefore(fn, calls[k]!); - foldRead(fn, calls[k]!, el); + foldRead(useMap, fn, calls[k]!, el); } - for (const g of getters) removeInst(g); - removeInst(w); - removeInst(it); - removeInst(itfn); - if (soleUse(symGlobal, symprop)) removeInst(symGlobal); - removeInst(symprop); + for (const g of getters) removeInst(useMap, g); + removeInst(useMap, w); + removeInst(useMap, it); + removeInst(useMap, itfn); + removeInst(useMap, symprop); + if (usesOf(useMap, symGlobal).length === 0) removeInst(useMap, symGlobal); // the array itself is now unused (or write-only) — the sinking // pass and DCE finish it off stats.iters_folded++; @@ -522,9 +552,11 @@ function removableWhenDead(inst: Inst): boolean { } function eliminateDead(fn: Func, stats: OptStats): boolean { - // use counts over operands and edge arguments - const counts = new Map(); - const bump = (v: Inst) => counts.set(v, (counts.get(v) || 0) + 1); + // use counts over operands and edge arguments, indexed by inst.id + const counts = new Array(fn.next_value_id).fill(0); + const bump = (v: Inst) => { + counts[v.id] = (counts[v.id] ?? 0) + 1; + }; fn.forEachInst((inst) => { for (const o of inst.operands) bump(o); if (inst.targets) { @@ -534,19 +566,21 @@ function eliminateDead(fn: Func, stats: OptStats): boolean { const worklist: Inst[] = []; fn.forEachInst((inst) => { - if (!counts.get(inst) && removableWhenDead(inst)) worklist.push(inst); + if (!counts[inst.id] && removableWhenDead(inst)) worklist.push(inst); }); let changed = false; while (worklist.length > 0) { const inst = worklist.pop()!; if (!inst.block) continue; - removeInst(inst); + const b = inst.block; + const idx = b.insts.indexOf(inst); + if (idx >= 0) b.insts.splice(idx, 1); + inst.block = null; stats.dead_removed++; changed = true; for (const o of inst.operands) { - const n = counts.get(o)! - 1; - counts.set(o, n); + const n = --counts[o.id]!; if (n === 0 && o.block && removableWhenDead(o)) worklist.push(o); } } @@ -564,9 +598,11 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O for (;;) { let changed = module ? inlineDirectCalls(module, fn, s) : false; if (eliminateDead(fn, s)) changed = true; // kill the closure before judging its env - if (scalarReplaceEnvs(fn, s)) changed = true; - if (foldIteratorWrappers(fn, s)) changed = true; - if (sinkAllocations(fn, s)) changed = true; + // one use scan per round, kept accurate by the mutation helpers + const useMap = buildUseMap(fn); + if (scalarReplaceEnvs(useMap, fn, s)) changed = true; + if (foldIteratorWrappers(useMap, fn, s)) changed = true; + if (sinkAllocations(useMap, fn, s)) changed = true; if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; } From a48957f8f8eec3e3e90156a6f82c72abd01199a8 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 11 Jul 2026 13:41:54 -0700 Subject: [PATCH 081/146] eir: add echojs-maam submodule + MAAM integration plan echojs-maam (the MAAM-style abstract interpreter) comes in as a submodule at external-deps/echojs-maam on its ejs-integration branch, pinned past the Phase 0 dialect-shim work (echojs-dialect handling, degraded-binding metrics, CJS build for consumption from the babel'd compiler tree under node 22.4). docs/maam-plan.md is the phased plan for feeding maam types into EIR lowering as a node-identity-keyed TypeOracle: Phase 0 probe (--types, stats only), Phase 1 node-keyed oracle + top-degradation, Phase 2 low-tier emit, Phase 3 guarded typed arithmetic, Phase 4 shapes (outline). Includes a future-work assessment of the analyzer architecture's production path (reference-semantics core, swappable fixpoint engine behind the oracle interface) and corrects the stage2/stage3 gate: raw byte-identity does not hold even on pristine HEAD (per-work-dir link metadata), so the gate is functional -- identical outputs over a fixed corpus, binary diffs attributable to link metadata only. The repos stay separate for now for paper-writing purposes; a merge is anticipated later, so the submodule/CJS plumbing is deliberately minimal. Co-Authored-By: Claude Fable 5 --- .gitmodules | 4 + docs/maam-plan.md | 370 ++++++++++++++++++++++++++++++++++++++ external-deps/echojs-maam | 1 + 3 files changed, 375 insertions(+) create mode 100644 docs/maam-plan.md create mode 160000 external-deps/echojs-maam diff --git a/.gitmodules b/.gitmodules index ef154eee..ed2e4bef 100644 --- a/.gitmodules +++ b/.gitmodules @@ -1,3 +1,7 @@ +[submodule "echojs-maam"] + path = external-deps/echojs-maam + url = https://github.com/toshok/echojs-maam.git + branch = ejs-integration [submodule "esprima"] path = external-deps/esprima url = https://github.com/toshok/esprima.git diff --git a/docs/maam-plan.md b/docs/maam-plan.md new file mode 100644 index 00000000..96e3e835 --- /dev/null +++ b/docs/maam-plan.md @@ -0,0 +1,370 @@ +# MAAM integration plan: a type oracle for EIR + +How the `echojs-maam` abstract interpreter (submodule at +`external-deps/echojs-maam`, branch `ejs-integration`) feeds types into EIR +lowering, in independently-landable phases, without restructuring either +codebase. + +## Context: what echojs-maam is, as found + +`echojs-maam` ("maam-fable") is a ~7k-line TypeScript transliteration of +Darais/Might/Van Horn's MAAM — one definitional CESK* interpreter +(`src/lang/machine.ts`) run under different monads to get concrete evaluation, +k-CFA, and path/flow/flow-insensitive analyses. It consumes **standard ESTree** +(`analyze(program, spec)` in `src/analysis.ts`; zero runtime deps — acorn is +dev-only, behind `src/lang/parse.ts` which is deliberately excluded from the +build). The `ejs-integration` branch already models the shapes echojs's +pre-EIR desugars emit: `%objectCreate`, `%setPrototypeOf`, +`%setConstructorKind*`, `%constructSuper`, and the +`Object.defineProperty` method/accessor patterns (`test/echojs-shape.test.ts` +hand-builds exactly those trees). 192 tests pass under `npm test`. + +It is research-quality and honest about it: exceptions are control-only, +cross-module linking is unmodeled (imports degrade to `undefined`), calls to +unmodeled externals degrade and are *counted* (`metrics.unknownCalls`), and the +Octane corpus shows the heavier benchmarks need the widening knobs +(`stateCap`/`shapeCap`) to converge. What it computes is exactly what we want: +type-aware hidden classes per allocation site (`result.layouts()` — field +names, `TypeSig`s, struct offsets), per-function `(param types) → return type` +tables (`result.specializations()`), accessor-dispatch sites, and — via +`concreteEval()` — a genuine concrete interpreter usable as a differential +oracle. What it does **not** yet have is a per-AST-node type query: +`valueOfVar(name)` joins by *name* across all configs, and core locations map +only to source *spans* — which echojs trees don't carry (see mismatches below). +That query is the main new surface this plan adds, on the maam side. + +On the echojs side the seams already exist by design: `lib/eir/ops.ts` is the +declared effect-table contract ("the optimizer and the abstract interpreter"), +including an unused low tier (`has_tag`, `unbox_f64`, `box_f64`, +`f64_add/sub/mul/div/lt`); `lib/eir/scopes.ts` keys its `refs` map on AST nodes +(`Map`); `lib/eir/lower.ts` lowers `BinaryExpression` in +one place (`LowerFunction.binary`, the `binops` table) and every variable +read/write through `readVariable`/`writeVariable`; `Inst.type` in +`lib/eir/ir.ts` is an `"any"` placeholder awaiting the lattice. Note: +`lib/eir/emit.ts` does **not** yet implement the low-tier ops — that is a +prerequisite phase, pure echojs work. + +## ESTree dialect mismatches (echojs `lib/estree.ts` vs. what maam reads) + +Found by inspection; the adapter (Phase 0) must handle each: + +1. **`TryStatement.handlers` (array) + `guardedHandlers`** vs. standard + `handler`. `normalize.ts:313` reads `s.handler` — echojs trees would + silently drop every catch clause. Fix in maam: accept both. +2. **No `range`/`start`/`end` on nodes.** echojs parses with + `esprima.parse(src, {loc: true, raw: true})` (`lib/passes/gather-imports.ts:275`); + maam's `spanOf` falls back to `{0,0}`. Consequence: spans cannot key + anything; the oracle must be **node-identity** keyed (same tree, in + process). Synthetic desugar nodes have no positions at all. +3. **Functions carry `defaults`/`rest`** (old-esprima style) instead of + `AssignmentPattern`/`RestElement` params. maam must evaluate `defaults` + (echojs EIR handles them natively; the analysis must match). +4. **`MetaProperty.meta/property` are raw strings**, not Identifiers — moot + post-desugar (`DesugarMetaProperties` removes them). +5. **Toplevel wrapper**: at `collectEIRToplevel` time the Program body is one + synthetic `FunctionDeclaration` (from `insert_toplevel_func`) whose body + holds the module statements, including `ImportDeclaration` / + `ExportNamedDeclaration` wrappers. The adapter analyzes + `{type:"Program", body: toplevel.body.body}` (preserving node identity) + and must tolerate export wrappers inline. +6. **Intrinsic coverage gap**: echojs's whitelist (`lib/eir/intrinsics.ts`) + includes `%arrayFromSpread`, `%constructSuperApply`, `%constructApply`, + `%getNewTarget`, `%makeGenerator`/`%generatorYield`/…, + `%createIteratorWrapper`; maam models only the class/prototype set. Unknown + intrinsics must degrade *soundly* (to ⊤, see below), never throw. + +## The interface contract + +echojs side, new file `lib/eir/oracle.ts` (the only new echojs surface): + +```ts +// what lowering consumes; deliberately smaller than what maam computes +export type TypeTag = "number" | "string" | "boolean" | "undefined" + | "null" | "object" | "closure"; +export interface EirType { + tags: ReadonlySet | "top"; // "top" = no information +} +export interface TypeOracle { + // type of the value an expression node evaluates to (join over all + // reached contexts); "top" when unknown/unanalyzed + typeOfNode(n: e.Node): EirType; + // true iff metrics.unknownCalls === 0 — required before any + // UNguarded consumption (guarded fast paths don't need it) + closedWorld(): boolean; + describe(): string; // stats line for --types logging +} +``` + +maam side (`ejs-integration` branch), additions to `AnalysisResult`: + +```ts +// node-identity keyed; built by having normalize.ts record the source +// node (not just its span) at the same points it records siteSpans, +// plus declaration-node → alpha-renamed core Name for bindings +nodeTypes(): ReadonlyMap; // e.g. "num", "num|str", "⊤" +typeOfNode(n: estree.Node): TypeSig | undefined; +``` + +plus one semantic fix: **degrade to ⊤, not `undefined`**. +`machine.ts` currently binds unknown-call results and unmodeled imports to +`domain.lit(litUndef)` (`machine.ts:1296,1355`) — fine for reachability, +**unsound as a type** ("this is undefined" vs. "this is anything"). Add a +`domain.top` to `ValDomain` and use it in `degrade`. This is the one +non-additive maam change and it lands first. + +## Phases + +**Phase 0 — plumbing probe (consume nothing).** +Add `--types` to `lib/options.ts` (default off). When on, `compile()` in +`lib/compiler.ts` — after `pre_eir_convert`, before `collectEIRToplevel` — +calls a thin adapter (`lib/eir/oracle.ts`) that imports maam, wraps the +toplevel body as a Program, runs `analyze(prog, kCFA(1, "flow-sensitive", +"call-site", /*shapeCap*/ 64, false, false, false, /*stateCap*/ 512))`, +and logs `result.describe()` + `metrics` + wall time. Nothing downstream reads +it; a crash or `RestrictionError`/`NormalizeError` degrades to a warning, never +a compile error. maam-side deliverables: `handlers` shim, `defaults`/`rest` +handling, unknown-intrinsic tolerance. The real point: **measure** whether +compiler-sized modules converge and at what cost, on our actual sources. +*Gate:* full matrix green with flag off (`buck2 build //:test-eir +//:test-stage0 //:test-stage1 //:test-stage2 //:test-stage3`); stage2≡stage3 +per the functional gate under "Validation strategy" (raw binary byte-identity +does NOT hold today even on pristine HEAD — buck stages link in per-genrule +temp dirs, so LC_UUID/embedded-path/signature metadata differs; discovered +during Phase 0); `ejs --types` over `test/*.js` and `lib/*.ts`'s generated JS +reports stats without crashing — run via the node-hosted dev tree: +buck-staged work trees contain no `external-deps/`, so `--types` there +warns-and-skips by design. + +**Phase 1 — the node-keyed oracle.** +maam: ⊤-degradation; `normalize.ts` records `Loc → estree.Node`; +`analysis.ts` exposes `nodeTypes()`/`typeOfNode()`; unit tests in maam's suite +(node-identity round-trip through hand-built echojs-dialect trees, extending +`test/echojs-shape.test.ts`). echojs: `TypeOracle` adapter mapping `TypeSig` +strings to `EirType`; `--types` now also prints per-binding types for a +`--types-dump` debug flag. Still consumes nothing in codegen. +*Gate:* matrix green (flag off); new maam tests green; oracle dump on +`test/eir-toplevel1.js` matches hand-checked expectations. + +**Phase 2 — emit the low tier (echojs only, independent of maam).** +Implement `has_tag`, `unbox_f64`, `box_f64`, `f64_add/sub/mul/div/lt` in +`lib/eir/emit.ts` (NaN-boxing checks mirror `LLVMIRVisitor.isNumber` in +`lib/compiler.ts`); teach `lib/eir/verifier.ts` that f64/i1-typed values may +only flow into their consumers (`Inst.type` gets its first real values: +`"f64"`, `"i1"`); unit tests in `lib/eir/tests.ts` (`buck2 build //:test-eir`) +via hand-built `FunctionBuilder` functions asserting printer/verifier/emit +behavior, plus one end-to-end test file exercising a hand-forced fast path. +*Gate:* `//:test-eir` green; full matrix green (no lowering changes yet). + +**Phase 3 — typed arithmetic, born in lowering, guarded, flag-gated.** +`LowerFunction.binary()` consults the oracle (threaded through +`lowerAnalyzedFunction` from `collectEIRToplevel`; `null` oracle = today's +behavior). When both operands' types ⊑ number for `+ - * / <`, emit the +guarded diamond (same block-splitting shape as `LowerFunction.logical()`): +`has_tag` both → fast block `unbox_f64/f64_op/box_f64` → join blockparam; +slow block keeps the generic op. **Guarded consumption is correct even if the +oracle is wrong** — the guard decides at runtime; only code size/speed change. +Unguarded (guard-free) emission stays out until `closedWorld()` plus much more +validation. Why born-typed rather than a post-hoc `optimize.ts` pass: the +rewrite needs CFG surgery (block split + join params), which lowering already +does idiomatically, while `optimize.ts` is a flat in-place scanner — a post-hoc +pass would be *more* code, not less. (A post-hoc pass remains attractive later +for typing *optimizer-created* values; nothing here precludes it.) +*Gate:* matrix green flag-off, stage2≡stage3 functional gate; a `--types` lane: +compile the full `test/` suite with `--types` under the node-hosted compiler +and diff every output against the flag-off baselines (byte-identical stdout); +`test/modernization/`-style probe discipline for a new `test/types/` dir +(each file diffed against `node `); an arithmetic microbenchmark +demonstrating the fast path fires. + +**Phase 4 (outline only) — shapes.** +`result.layouts()`/`constructors()` give monomorphic allocation sites with +struct offsets. Consuming them (fixed-offset property access) needs a shape +guard op and runtime object-layout support that don't exist; design that as +its own document once Phase 3 has proven the pipeline. Until then, shapes +inform *diagnostics* only (polymorphism warnings under `--types-dump`). + +## Self-hosting strategy + +The constraint: stage1+ compilers are the compiler compiled by itself, and the +esprima fork parses ES6-era JS only. maam's own source is strict TS 5.x using +`??`, `?.`, and generators; `tsc` at `target: ES2022` leaves `??`/`?.` in the +output, which the esprima fork cannot parse — so maam **cannot run under a +self-hosted compiler today**. Options weighed: + +- **(a) Vendored babel-downleveled build** — precedented (docs/plans.md + proposes exactly this for parser un-forking), and `//lib:generated` already + runs babel. Viable, but it drags a second-build-of-a-submodule into the + bootstrap now, for zero benefit while the flag is off. +- **(b) Node-only analysis, flag off during bootstrap** — stages remain + byte-identical trivially (the flag is off everywhere in the matrix); `--types` + is available wherever the compiler runs under node (stage0 and dev use). +- **(c) Syntax-downlevel pass in echojs** — that's the modernization project + (`test/modernization/`, 13 parser gaps), not this one. + +**Recommendation: (b) now, (a) when promotion is wanted.** Concretely: Phase 0 +imports maam via a `tsc -p tsconfig.build.json`-built `dist/` (an ESM/CJS +interop wrinkle exists — maam is `"type": "module"`, the babel'd compiler tree +is CJS under node 22.4; a `tsconfig.cjs.json` variant in the maam repo is the +one-file fix). Promotion to self-hosted `--types` waits until either the +babel-vendored build (a) or the TS port + parser modernization make it moot. +Until promotion, `--types` in a stage1+ compiler is a no-op with a warning. + +## Validation strategy + +- **Bootstrap matrix, every phase:** `//:test-eir`, `//:test-stage0..3`. + stage2≡stage3 is a *functional* gate, not raw byte-identity (which fails on + pristine HEAD from link metadata alone): stage2 and stage3 binaries, run in + identical work dirs over a fixed corpus, must produce byte-identical + outputs, and any stage2-vs-stage3 binary diff must be attributable to link + metadata (`cmp` after `codesign --remove-signature` + masking LC_UUID, or + diff the `--leave-temp` .ll artifacts). Executable byte-compares are only + meaningful when both binaries were linked in the same directory. Flag-off + means MAAM cannot regress the matrix. +- **Concrete interpreter as differential oracle:** `concreteEval()` is real + and exact (`analyze(prog, concreteEval()).result`). Add a maam-repo harness + that runs closed-world test files (start with `intrinsics: true` to cover + `Math`/`Array`/`parseInt`) and diffs the final value against `node` — any + divergence is a machine bug that would poison the abstract results too. + Precondition per file: `metrics.unknownCalls === 0`, else skip (degradation + makes the diff meaningless). Also diff against `ejs`-compiled output for the + subset both support — that checks *echojs* too, for free. +- **Abstract-vs-concrete containment spot checks:** for files the concrete + interpreter handles, assert the k-CFA `typeOfNode` at each checked node is ⊒ + the concrete value's type — cheap soundness fuzzing, catches ⊑-direction bugs. +- **`lib/eir/tests.ts`:** low-tier emit/verify (Phase 2), oracle-driven + lowering shape (Phase 3: assert the printed EIR contains + `has_tag`/`f64_add` diamonds for a numeric snippet, and does not for a + string one). +- **`--types` diff lane (Phase 3 gate):** entire `test/` suite compiled with + and without `--types`; outputs must be byte-identical. + +## Risks and unknowns + +- **Convergence on compiler-sized inputs.** Octane's heavier files don't + converge in tens of seconds; `lib/compiler.ts`'s generated JS is bigger. + `stateCap`/`shapeCap` bound time but cost precision. Phase 0 exists to turn + this unknown into a number before anything depends on it. +- **Degradation soundness.** Unknown calls/imports currently read as + `undefined`; consuming that as a type would miscompile. Fixed in Phase 1 + (⊤-degradation) and defended in depth by guarded-only consumption. +- **Unvalidated soundness claims.** The analyzer's soundness is asserted by + its own tests, not proven against ejs semantics (e.g. ejs's no-TDZ let/const, + `to_boolean` purity). Guards make Phase 3 immune; anything unguarded needs + the differential harness first. +- **Node-identity coupling.** The oracle keys on the exact post-desugar tree + object; any future pass that clones nodes between analysis and lowering + silently drops types (fail-soft to ⊤, but worth a debug counter). +- **ESM/CJS interop** for importing maam's build from the babel'd tree + (node 22.4 pinned in CI — no `require(esm)`). +- **Two-repo coordination.** The submodule pin advances with the oracle API; + phases state which repo each deliverable lands in to keep either repo + releasable alone. + +## Future work: can this architecture become production-grade? + +Assessment (Claude, 2026-07-11), recorded here so the Phase 0 numbers get read +against an explicit hypothesis rather than vibes. + +**The pessimistic reading is correct about the engine.** Small-step monadic +AAM/CESK* is close to the most expensive known way to compute a flow analysis: +every step pays monad plumbing, the state space is the product of +control × store × continuation abstractions, and the caps that force +convergence (`stateCap`/`shapeCap`) buy termination by discarding exactly the +precision we want to consume. The industrial abstract interpreters that ship +(Infer, Astrée) are compositional/summary-based engines, not small-step +machines. "This exact machine, flow-sensitive, over 100k-line modules, in +seconds" is not a realistic endpoint, and no micro-optimization changes that. + +**But the deployment profile is unusually favorable**, which is why the +architecture is worth keeping anyway: + +1. *AOT oracle, not IDE/CI.* Offline, deterministic, whole-program, behind an + opt-in flag — seconds-to-a-minute of compile time is tolerable. +2. *Wrong answers cost speed, not correctness.* Guarded consumption makes + precision an optimization, not an obligation. +3. *The input language is tiny.* Not "JavaScript" — the post-desugar echojs + dialect: no TDZ, whitelisted intrinsics, no eval/with/dynamic loading. + +**The durable asset is the definitional machine as reference semantics.** +`concreteEval()` as a differential oracle is something hand-optimized +analyzers never have. The classic path from research analyzer to product is +exactly this split: keep the slow, obviously-correct machine as the spec, and +if (and only if) Phase 0 measurements demand it, grow a fused fixpoint engine +— worklist, flow-insensitive-then-refine, or per-function summaries +(`specializations()` already gestures at summaries) — that shares the domain +definitions and is continuously diffed against the reference. Rewrite the +fixpoint loop, never the semantics. + +**The `TypeOracle` interface is the insurance policy.** It is deliberately +smaller than what maam computes and keyed on nodes, not maam internals. If +convergence on compiler-sized inputs is unacceptable, the engine behind +`typeOfNode()` is swappable — a monovariant Andersen-plus-type-lattice pass +would cover the Phase 3 arithmetic use case at a fraction of the cost — and +lowering never knows. Nothing should be built that assumes the MAAM machine +specifically sits behind the oracle. + +**Decision rule:** let the Phase 0 measurement, not aesthetics, make the call. +Three outcomes: (a) converges with acceptable cost on our corpus → ship as-is +behind `--types`; (b) converges only with heavy widening → keep it for +diagnostics/differential duty, start the fused engine sharing its domains; +(c) doesn't converge → oracle interface stays, engine is replaced outright. + +Smaller forward items surfaced by the Chunk A integration review: + +- `metrics.unknownCalls` was broadened during integration (method/apply/ + tailcall degradations now count, not just call/new). This is what the + Phase 1 `closedWorld()` contract needs, but it changes the metric's + definition out from under the numbers in the maam repo's docs/paper — + regenerated tables will shift, and any comparison must say so. +- Rest parameters are degraded (bound to an empty abstract array + counted), + not modeled. Precise rest needs a core/machine varargs extension — a + natural Phase 1 companion to ⊤-degradation. +- Guarded-catch guards are modeled per-clause; cross-clause guard side + effects (guard 1 mutates, clause 2 observes) are dropped. Unreachable from + echojs output (esprima always emits `guardedHandlers: []`) — revisit only + if that changes. +- `tryIntrinsic` dispatches on the `%` name prefix with a `scope.has()` + escape for bound names (`%super`). If echojs ever grows more bound + `%`-names or direct `%super(...)` calls, the intrinsic whitelist in both + repos needs to stay in sync — a shared fixture file is the eventual answer. + +## What we explicitly will NOT do + +- No parser swap or syntax modernization as part of this (tracked separately + in docs/plans.md). +- No runtime changes beyond what the already-declared low-tier ops need; no + new object layouts, no shape guards, no GC work. +- No rewrite or restructuring of maam's monad/driver machinery, and no + EIR-targeting maam frontend (it keeps consuming ESTree; the ANF core stays). +- No post-hoc "type inference pass" duplicated inside echojs — types come from + the oracle or stay `any`. +- No default-on behavior anywhere until the differential harness and the + `--types` diff lane have real mileage. + +## Phase checklist (for /goal sessions) + +- [ ] **P0** `--types` flag + `lib/eir/oracle.ts` adapter + maam dialect shims + (`handlers`, `defaults`/`rest`, unknown-intrinsic tolerance, toplevel + unwrap); stats logging only. + *Gate:* full matrix green (flag off); `--types` runs over `test/*.js` + without crashing (node-hosted dev tree — buck work trees have no + `external-deps/`, so `--types` there warns-and-skips by design); + convergence/timing numbers recorded in the PR. +- [ ] **P1** maam: ⊤-degradation + `nodeTypes()`/`typeOfNode()` (node-identity + keyed); echojs: `TypeOracle` + `--types-dump`. + *Gate:* maam suite green (incl. new node-identity tests); matrix green; + hand-checked oracle dump for `test/eir-toplevel1.js`. +- [ ] **P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; + `Inst.type` carries `"f64"`/`"i1"`. + *Gate:* `//:test-eir` green with new low-tier tests; matrix green. +- [ ] **P3** oracle-guided guarded arithmetic in `LowerFunction.binary`, + `--types`-gated. + *Gate:* matrix green + stage2≡stage3 functional gate (flag off); + full-suite `--types` + diff lane byte-identical; EIR-shape unit tests; microbenchmark delta + recorded. +- [ ] **P3.5** differential harness in maam repo (`concreteEval` vs node vs + ejs on closed-world tests) wired into its CI. + *Gate:* zero divergences on the curated corpus. +- [ ] **P4** (design doc only) shape-guarded property access: guard op, + runtime layout, promotion criteria from Phase 3 experience. diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam new file mode 160000 index 00000000..1bea5def --- /dev/null +++ b/external-deps/echojs-maam @@ -0,0 +1 @@ +Subproject commit 1bea5defd5c2a19d81bc544a167355b996aae849 From d3e3fd18cc1756abfb7eb75e461e08889d2f0747 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 11 Jul 2026 13:42:10 -0700 Subject: [PATCH 082/146] eir: Phase 0 --types probe: maam analysis adapter, stats only New --types flag (default off, distinct from --record-types) runs the echojs-maam abstract interpreter over each module's post-desugar tree -- after pre_eir_convert, before collectEIRToplevel mutates it -- and logs a per-module stats line (wall time, reached states, iterations, unknownCalls, degradedBindings, warning kinds) plus maam's describe(). Nothing downstream consumes the results; this exists to measure convergence and cost on real modules before anything depends on it. lib/eir/oracle.ts is the only new surface: a lazy, warn-don't-fail adapter. maam is require()d only when the flag is on, from the submodule's dist/cjs build, located by walking up from __dirname (works from the repo tree and lib/generated; buck-staged work trees have no external-deps/, so --types there warns-and-skips -- dev-tree-only for now). Unbuilt dist, NormalizeError/RestrictionError, and analysis crashes each degrade to a compiler warning; load failure is cached once per process while analysis failures stay per-module. In a self-hosted compiler the typeof require guard fails benignly (get_global property semantics) and --types is a no-op with a warning, per plan. Verified: full matrix green; flag-on vs flag-off executables byte-identical (same-dir cmp, analysis running); adversarially reviewed -- no mandatory findings. Probe numbers on test files: eir-toplevel1.js analyzes in 19ms (80 states, unknownCalls=19 -- dominated by console.log method calls under the broadened counter). Co-Authored-By: Claude Fable 5 --- ejs-es6.ts | 5 ++ lib/compiler.ts | 7 +++ lib/eir/oracle.ts | 157 ++++++++++++++++++++++++++++++++++++++++++++++ lib/options.ts | 4 ++ 4 files changed, 173 insertions(+) create mode 100644 lib/eir/oracle.ts diff --git a/ejs-es6.ts b/ejs-es6.ts index c0e402c9..d143bf9c 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -108,6 +108,7 @@ const options: CompilerOptions = { warn_on_undeclared: false, frozen_global: false, record_types: false, + types: false, output_filename: null, show_help: false, leave_temp_files: false, @@ -250,6 +251,10 @@ const args: Record = { flag: "record_types", help: "generates an executable which records types in a format later used for optimizations.", }, + "--types": { + flag: "types", + help: "run the MAAM type-analysis probe over each module and log its stats (phase 0: consumes nothing).", + }, "--frozen-global": { flag: "frozen_global", help: "compiler acts as if the global object is frozen after initialization, allowing for faster access.", diff --git a/lib/compiler.ts b/lib/compiler.ts index 5c0a5a1b..46e86cad 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -18,6 +18,7 @@ import { SRetABI } from "./sret-abi"; import { collectEIRToplevel } from "./eir/integrate"; import type { ModuleAccessor } from "./eir/integrate"; import { EIREmitter, VisitorSurface } from "./eir/emit"; +import { runTypeAnalysisProbe } from "./eir/oracle"; import type * as e from "./estree"; import type { CompilerOptions } from "./options"; import type { ModuleInfo, JSModuleInfo } from "./module-info"; @@ -686,6 +687,12 @@ export function compile( // pipelines see their %-intrinsic output tree = pre_eir_convert(tree, module_filename, module_infos, options); + // --types (MAAM phase 0, docs/maam-plan.md): probe-only type + // analysis over the desugared toplevel. Must run before + // collectEIRToplevel, which consumes (and then empties) the toplevel + // body. Logs stats; consumes nothing; never fails the compile. + if (options.types) runTypeAnalysisProbe(tree, source_filename); + // EIR is the only pipeline: a module that can't lower is a compile // error, not a fallback let lowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); diff --git a/lib/eir/oracle.ts b/lib/eir/oracle.ts new file mode 100644 index 00000000..3d769b26 --- /dev/null +++ b/lib/eir/oracle.ts @@ -0,0 +1,157 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Phase 0 of the MAAM type-oracle integration (docs/maam-plan.md): a +// plumbing probe. With --types on, compile() hands us the desugared +// toplevel BEFORE collectEIRToplevel consumes it; we wrap its body as a +// Program (preserving node identity — the eventual oracle is keyed on +// the exact node objects), run the echojs-maam abstract interpreter +// over it, and log its stats. Nothing downstream reads the result yet. +// +// Two hard rules, both load-bearing: +// - maam is require()d lazily, only when the probe actually runs, so +// a flag-off compile never touches it (and never pays for it); +// - every failure here — missing/unbuilt submodule, an analysis +// error, a self-hosted compiler with no host require() — degrades +// to a compiler warning. --types must never turn a compiling +// program into a failing one. + +import * as path from "@node-compat/path"; +import * as fs from "@node-compat/fs"; +import type * as e from "../estree"; +import { reportWarning } from "../errors"; + +// The slice of maam's AnalysisResult the probe consumes, typed +// structurally so we never import (or resolve types from) the +// submodule itself. +interface MaamMetrics { + reachedStates: number; + configs: number; + iterations: number; + shapesInterned: number; + unknownCalls: number; + // added alongside this integration; absent in older builds + degradedBindings?: number; +} + +interface MaamResult { + metrics: MaamMetrics; + describe(): string; + warnings(): Array<{ kind: string }>; +} + +interface MaamModule { + analyze(program: unknown, spec: unknown): MaamResult; + kCFA(...args: unknown[]): unknown; +} + +const MAAM_DIST_REL = ["external-deps", "echojs-maam", "dist", "cjs", "index.js"]; +const MAAM_SUBMODULE_REL = ["external-deps", "echojs-maam"]; + +// undefined = not attempted yet; null = attempted and unavailable (the +// warning has already been issued — don't repeat it per module) +let cached_maam: MaamModule | null | undefined; + +function errorMessage(err: unknown): string { + if (err instanceof Error) return `${err.name}: ${err.message}`; + return String(err); +} + +// Locate and require() the maam CJS build. We walk up from this +// module's directory looking for external-deps/echojs-maam — that works +// both for the source tree (lib/eir/) and for the babel'd node tree +// (lib/generated/lib/eir/, whose ancestors include the repo root). A +// self-hosted (stage1+) compiler has no host require()/__dirname; the +// probe is a documented no-op-with-a-warning there. +function loadMaam(source_filename: string): MaamModule | null { + if (cached_maam !== undefined) return cached_maam; + cached_maam = null; + + if (typeof require !== "function" || typeof __dirname !== "string") { + reportWarning( + "--types is not available in a self-hosted compiler (no host require()); type analysis skipped.", + source_filename + ); + return null; + } + + let submodule_dir: string | null = null; + for (let dir = __dirname, prev = ""; dir !== prev; prev = dir, dir = path.dirname(dir)) { + const sub = path.join(dir, ...MAAM_SUBMODULE_REL); + if (!fs.existsSync(sub)) continue; + submodule_dir = sub; + const dist = path.join(dir, ...MAAM_DIST_REL); + if (!fs.existsSync(dist)) break; // submodule present, build output missing + try { + cached_maam = require(dist) as MaamModule; + return cached_maam; + } catch (err) { + reportWarning( + `--types: failed to load echojs-maam from ${dist} (${errorMessage(err)}); type analysis skipped.`, + source_filename + ); + return null; + } + } + + reportWarning( + submodule_dir !== null + ? `--types: echojs-maam is present at ${submodule_dir} but its CJS build is missing; ` + + "run `npm run build && npm run build:cjs` there. Type analysis skipped." + : "--types: could not locate the external-deps/echojs-maam submodule; type analysis skipped.", + source_filename + ); + return null; +} + +function warningSummary(warnings: Array<{ kind: string }>): string { + if (warnings.length === 0) return "none"; + const counts = new Map(); + for (const w of warnings) counts.set(w.kind, (counts.get(w.kind) || 0) + 1); + return [...counts.entries()].map(([kind, n]) => `${kind}:${n}`).join(","); +} + +// Run the probe over the module's desugared tree. `tree` is the +// post-pre_eir_convert Program whose body[0] is the synthetic toplevel +// FunctionDeclaration (insert_toplevel_func) holding the module's +// statements. +export function runTypeAnalysisProbe(tree: e.Program, source_filename: string): void { + const maam = loadMaam(source_filename); + if (!maam) return; + + const toplevel = tree.body[0]; + if (!toplevel || toplevel.type !== "FunctionDeclaration") { + reportWarning( + "--types: expected the synthetic toplevel FunctionDeclaration; type analysis skipped.", + source_filename + ); + return; + } + + // Same body array, same node objects — no cloning. + const program = { type: "Program", sourceType: "script", body: toplevel.body.body }; + + const started = Date.now(); + try { + const result = maam.analyze( + program, + maam.kCFA(1, "flow-sensitive", "call-site", /*shapeCap*/ 64, false, false, false, /*stateCap*/ 512) + ); + const wall = Date.now() - started; + const m = result.metrics; + console.warn( + `--types: ${source_filename}: wall=${wall}ms reachedStates=${m.reachedStates} ` + + `configs=${m.configs} iterations=${m.iterations} shapesInterned=${m.shapesInterned} ` + + `unknownCalls=${m.unknownCalls} degradedBindings=${m.degradedBindings ?? 0} ` + + `warnings=${warningSummary(result.warnings())}` + ); + console.warn(result.describe()); + } catch (err) { + const wall = Date.now() - started; + reportWarning( + `--types: analysis failed after ${wall}ms (${errorMessage(err)}); continuing without type information.`, + source_filename + ); + } +} diff --git a/lib/options.ts b/lib/options.ts index 523d6a07..8f114749 100644 --- a/lib/options.ts +++ b/lib/options.ts @@ -22,6 +22,10 @@ export interface CompilerOptions { warn_on_undeclared: boolean; frozen_global: boolean; record_types: boolean; + // MAAM phase-0 probe (docs/maam-plan.md): run the type analysis and + // log stats; consumes nothing. Distinct from record_types (the + // runtime type-recording instrumentation). + types: boolean; output_filename: string | null; show_help: boolean; leave_temp_files: boolean; From 3e71ad49680e09d8df57b8ad3b67585f768f7a13 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 19 Jul 2026 10:04:32 -0700 Subject: [PATCH 083/146] eir: Phase 0 measurement results; P0 done, P1 rescoped accordingly docs/maam-p0-results.md: the Chunk C numbers the Phase 0 probe exists to produce, adversarially verified against the raw logs (all aggregates reproduce; two figures corrected in review: top-3-reject share is ~75% combined / 100% of compiler-module rejects, not ~90%; unknown-call module count 378). Headline: where the analysis runs, it converges everywhere with zero timeouts -- median 5ms per test module against a 333ms median compile, +5.2s on an 11s compiler self-compile (96.9% of that in the single esprima-es6 module), 287MB peak RSS, byte-stable across runs. But the plan's central question -- do compiler-sized modules converge? -- is still open, and not because of the engine: maam's normalizer rejects every big module before analysis starts, on exactly three constructs EIR lowers natively so no pre-EIR desugar removes them (TemplateLiteral, ForOfStatement, destructuring params). maam-plan.md: P0 checked off with the finding; P1 rescoped to front-load normalizer coverage for those three constructs plus cap-hit observability (saturation currently indistinguishable from natural convergence), then re-run the measurement to close the question. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 170 ++++++++++++++++++++++++++++++++++++++++ docs/maam-plan.md | 16 +++- 2 files changed, 184 insertions(+), 2 deletions(-) create mode 100644 docs/maam-p0-results.md diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md new file mode 100644 index 00000000..a830cb7c --- /dev/null +++ b/docs/maam-p0-results.md @@ -0,0 +1,170 @@ +# MAAM Phase 0 measurement results + +Date: 2026-07-19. Chunk C of the Phase 0 plan (docs/maam-plan.md): run the +`--types` probe over real corpora and turn "does it converge on our sources, +at what cost" into numbers. Measurement only — no code changes. + +## Environment + +- echojs `eir` @ d3e3fd1 (probe as committed), submodule `echojs-maam` + `ejs-integration` @ 1bea5de, maam CJS dist built from that commit. +- node v22.4.0, macOS arm64 (Darwin 24.6.0), 32 GB RAM, llvm at + `/opt/homebrew/opt/llvm`. +- Compiler under test: node-hosted stage0 (`//lib:generated` babel tree), + run from a stage0-style work tree (`//:srcdir-tree` copy + `lib/generated` + + repo `test/`), the same layout `buck-test-stage.sh` assembles. +- Analysis spec (hardcoded in the probe): + `kCFA(1, "flow-sensitive", "call-site", shapeCap=64, false, false, false, stateCap=512)`. +- Raw logs + orchestrator/aggregator scripts: `~/.cache/maam-p0-logs/` + (`A-on/`, `A-off/`, `B/`, `*.summary.json`). + +## Command shapes + +Corpus A, per file (cwd = worktree`/test`, 120 s kill-timeout, concurrency 4): + + node /lib/generated/ejs-es6.js --srcdir \ + --moduledir ../node-compat --moduledir ../ejs-llvm --types .js + +Corpus B, one self-compile exactly like stage1 (cwd = worktree root): + + /usr/bin/time -l node lib/generated/ejs-es6.js --srcdir \ + --moduledir node-compat --moduledir ejs-llvm --types ejs-es6.js + +`PATH` prepends the llvm bindir; `NODE_PATH` = repo `node_modules` + +`node-llvm/build/Release`; `SDKROOT` from xcrun — mirroring +`buck-test-stage.sh`. The work tree must live **inside the repo checkout** +so the probe's upward walk can locate `external-deps/echojs-maam` (see the +dev-tree-only note in maam-plan.md); from `/tmp` the probe warns +"could not locate the submodule" and analyzes nothing. + +## Corpus A — `test/*.js` (457 files, all run; no sampling needed) + +Full run at concurrency 4; the 120 s per-file budget was never approached. + +| class | files | notes | +|---|---|---| +| analyzed, degraded-with-warning | 362 | ≥1 module with warnings (see kinds below) | +| analysis-failed (warn-wrapped) | 84 | all `NormalizeError`; compile continues, exit 0 | +| analyzed, clean (`warnings=none`) | 10 | closure-test1, closure4, closure7, eir-interop1-lib, eir-ns1-lib, eir-syntax2-lib, object1, reexport1-lib, reexport2-mid, void0 | +| TIMEOUT (>120 s) | 0 | | +| compile-N/A | 1 | `tester.js` — parse error in the esprima fork, fails identically without `--types` (exit 255 both ways) | + +**Zero compile failures caused by `--types`.** Every failure mode above is a +warning; the one non-zero exit fails flag-off too. Parity spot-check: 21 +files (every 23rd, alphabetically, plus tester.js) compiled flag-off — 21/21 +exit codes identical to the flag-on run. + +Warning kinds across the 413 analyzed modules (module counts): +`unknown-call` 378, `polymorphic-function` 27. `unknown-call` is ubiquitous +because nearly every test calls `console.log` (counted as an unknown method +call since the Chunk A metric broadening). + +`NormalizeError` breakdown (84 files): + +| count | message | +|---|---| +| 26 | only plain identifier parameters are supported (no destructuring/defaults/rest) | +| 22 | unsupported statement: ForOfStatement | +| 8 | unsupported statement: LabeledStatement | +| 7 | unsupported expression: TemplateLiteral | +| 5 | computed object keys | +| 4 | Object.defineProperty requires a string-literal key | +| 3 | TaggedTemplateExpression | +| 3 | object getters/setters | +| 2 | unsupported expression: VariableDeclaration | +| 2 | non-identifier object keys | +| 1 | DebuggerStatement | +| 1 | defineProperties non-literal descriptors | + +Wall time (analysis only, per module; n=413): median 5 ms, p90 12 ms, max +5032 ms, total 20.9 s. Whole-compile wall per file (includes llc + clang): +median 333 ms, p90 367 ms, max 7.3 s. Flag-on vs flag-off median on the +21-file sample: 335 ms vs 323 ms (~+4%). + +Slowest analyses: esprima-es6 (5.0 s; pulled in by esprima1/ +esprima-roundtrip1/2 as an import) — 3 appearances; typedarray2.js (2.2 s, +832 states, 32 994 iterations); fib.js (0.4 s, 9 687 iterations). + +unknownCalls per module: median 3, p90 15, max 168 (typedarray2), total +2 694. Top: typedarray2 168, math1 132, error1 70, typedarray14 69, +typedarray15 63. degradedBindings: 0 everywhere — post-desugar test trees +carrying `rest` never reach analysis (they bounce off the destructuring- +parameter NormalizeError first). + +## Corpus B — the compiler's own generated JS (stage1 self-compile input) + +One `--types` self-compile of `ejs-es6.js`: **45 modules, exit 0, executable +produced and linked.** Real time 11.35 s vs 6.15 s flag-off (+5.2 s, +85%); +4.74 s of the delta is the single esprima-es6 module. Max RSS 287 MB +(`/usr/bin/time -l`; 10 s RSS polling agrees) — nowhere near the 4 GB watch +threshold. No timeouts; per-module analysis never exceeded 4.8 s. + +| class | modules | +|---|---| +| analyzed (stats emitted) | 15 | +| analysis-failed (warn-wrapped NormalizeError) | 30 | +| TIMEOUT | 0 | + +Failure breakdown: TemplateLiteral 15, ForOfStatement 13, +destructuring/defaults/rest parameters 2. The compiler's own `lib/` modules +are written in modern JS; their post-desugar form still contains template +literals and for-of (EIR lowers those natively; nothing desugars them away +before the probe), so maam's normalizer rejects 2/3 of the compiler by +module count — including every big module (`compiler`, `eir/lower`, +`eir/optimize`, …). + +The 15 analyzed modules (analysis wall): esprima-es6 4 740 ms (102 states, +157 iters, 2 unknownCalls, polymorphic-function+unknown-call warnings), +escodegen-es6 62 ms, estraverse-es6 35 ms, esutils/lib/code 34 ms (739 +iters), sret-abi 6 ms, abi 3 ms, common-ids 3 ms (69 unknownCalls), +host-config 3 ms, plus 7 more ≤3 ms, all `warnings=none` or a single +unknown-call. degradedBindings: 0 on all 15. + +Determinism: a second full `--types` self-compile produced byte-identical +stats lines (wall stripped) — reachedStates/iterations/unknownCalls all +stable across runs. + +## Cap behavior + +Not observable. Neither `describe()` nor `metrics` exposes stateCap or +shapeCap hit counts; nothing in the output distinguishes "converged +naturally" from "converged because the cap smeared contexts". (esprima-es6's +5 s / 102-state / 157-iteration profile is wall-heavy but state-light, which +suggests time goes to store joins on very large flow-sensitive stores rather +than state explosion — but that is inference, not measurement.) **Finding +for Phase 1: surface cap-hit counters (`funcContexts` saturation, shape +widenings) in `metrics`.** + +## Reading (factual) + +- **Convergence verdict, Corpus A:** converges everywhere it runs; zero + timeouts; analysis is noise next to codegen (median 5 ms vs 333 ms + compile). Decision-rule outcome **(a)** for the gate corpus. +- **Convergence verdict, Corpus B:** converges on everything it can parse, + at +5.2 s on an 11 s self-compile — tolerable for an opt-in flag. But the + measured set excludes every compiler-sized module: the largest thing + actually analyzed was esprima-es6. The plan's headline question ("do + compiler-sized modules converge?") is **still open — blocked on dialect + coverage, not on the engine.** The binding constraint Phase 0 found is + maam's normalizer coverage, not convergence or cost: TemplateLiteral, + ForOfStatement, and destructuring params account for 100% of Corpus B's + rejects (30/30), ~65% of Corpus A's (55/84), ~75% combined (85/114; ~77% + if TaggedTemplateExpression is counted into the template family). +- **Where time goes:** esprima-es6 dominates both corpora — its three + appearances in Corpus A (imported by the esprima tests) are 71.7% of A's + total analysis time (24.1% for a single appearance), and in Corpus B it is + 96.9% of analysis time and 91% of the flag-on/off wall delta; everything + else is ≤62 ms. Whatever + makes esprima slow (large flow-sensitive stores is the hypothesis) is the + first profiling target if bigger modules join the corpus. +- **Implication for the decision rule:** no evidence for (b) or (c); no + widening pressure observed and nothing failed to converge. But (a) can + only be provisionally claimed: the modules that would stress the engine + never reached it. The cheapest way to make Phase 0's question answerable + is normalizer coverage for the three dominant constructs, then re-run this + measurement — that decision belongs to Phase 1 planning, not this doc. +- `degradedBindings` never fired on either corpus; the rest-parameter + degradation path is currently exercised only by maam's own unit tests. +- `unknownCalls` is dominated by stdlib/console usage; per the plan's Future + work note, these numbers are not comparable to the maam repo's pre- + broadening paper tables. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 96e3e835..24981af0 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -343,15 +343,27 @@ Smaller forward items surfaced by the Chunk A integration review: ## Phase checklist (for /goal sessions) -- [ ] **P0** `--types` flag + `lib/eir/oracle.ts` adapter + maam dialect shims +- [x] **P0** `--types` flag + `lib/eir/oracle.ts` adapter + maam dialect shims (`handlers`, `defaults`/`rest`, unknown-intrinsic tolerance, toplevel unwrap); stats logging only. + *Done 2026-07-19* (maam 1bea5de; echojs d3e3fd1): all gates green, + numbers in docs/maam-p0-results.md. Headline finding: convergence on + compiler-sized modules is STILL OPEN — blocked on maam normalizer + coverage (TemplateLiteral/ForOfStatement/destructuring params = 100% + of the compiler-module rejects), not on the engine; where analysis + runs, it converges with zero timeouts and analysis cost is noise next + to codegen. *Gate:* full matrix green (flag off); `--types` runs over `test/*.js` without crashing (node-hosted dev tree — buck work trees have no `external-deps/`, so `--types` there warns-and-skips by design); convergence/timing numbers recorded in the PR. - [ ] **P1** maam: ⊤-degradation + `nodeTypes()`/`typeOfNode()` (node-identity - keyed); echojs: `TypeOracle` + `--types-dump`. + keyed); echojs: `TypeOracle` + `--types-dump`. Per the P0 results, P1 + should FRONT-LOAD maam normalizer coverage for TemplateLiteral, + ForOfStatement, and destructuring/defaults/rest params (these block + every compiler-sized module), surface cap-hit counters in `metrics` + (saturation is currently unobservable), then re-run the P0 measurement + to close the convergence question. *Gate:* maam suite green (incl. new node-identity tests); matrix green; hand-checked oracle dump for `test/eir-toplevel1.js`. - [ ] **P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; From d917a27c1f931292267bb92dd0874cbba1fcefd1 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 21 Jul 2026 09:02:53 -0700 Subject: [PATCH 084/146] eir: Phase 1 re-measurement closes the convergence question: outcome (a) Submodule pin -> 1e09ffd (top-degradation + TemplateLiteral/ForOf/ pattern coverage + cap-hit counters; 226 maam tests). With the three blocking constructs covered, the compiler-sized modules finally reach the engine -- and converge naturally: 38/45 self-compile modules analyzed (was 15/45), 0 stateCap hits anywhere including the 29,615-iteration driver analysis, shapeCap touched exactly once in each of 10 modules, +9.6s on the self-compile (8.6s of it in esprima-es6 + the driver), 575MB peak RSS, zero timeouts either corpus. The feared S1 precision cost (for-of over function arrays) is unmeasurable at corpus scale; degradedBindings now counts imports and rest as designed, so an imports-only module no longer masquerades as a closed world. Decision-rule verdict, adversarially verified against the raw logs: outcome (a) -- ship as-is behind --types. The remaining reject tail is one one-line gap (trailing RestElement kept in params by DesugarDestructuring, which maam's compileFunction doesn't map onto its dialect .rest path -- blocks 6 modules + 28 test files) plus labels / non-literal defineProperty keys / computed keys / accessors. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 121 ++++++++++++++++++++++++++++++++++++++ external-deps/echojs-maam | 2 +- 2 files changed, 122 insertions(+), 1 deletion(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index a830cb7c..5ef0687d 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -168,3 +168,124 @@ widenings) in `metrics`.** - `unknownCalls` is dominated by stdlib/console usage; per the plan's Future work note, these numbers are not comparable to the maam repo's pre- broadening paper tables. + +--- + +# Phase 1 re-measurement (Chunk E) + +Date: 2026-07-19 (runs) / 2026-07-21 (aggregation). Same protocol, +environment, and command shapes as the Phase 0 measurement above; the only +change is the analyzer: submodule @ 1e09ffd (⊤-degradation; TemplateLiteral / +ForOfStatement / pattern coverage; cap-hit counters; S1 closure-fingerprint +iteration degrade). echojs @ 3e71ad4 (no compiler changes since d3e3fd1). +Raw logs: `~/.cache/maam-p0-logs/` (`B2/`, `A2-on/`, alongside the Phase 0 +`B/`, `A-on/` for diffing). + +## Corpus B — compiler self-compile (the headline) + +**38 of 45 modules analyzed (was 15), exit 0, executable linked, no +timeouts.** Every compiler-sized module now reaches the engine and +converges: + +| module | wall | states | iterations | caps | +|---|---|---|---|---| +| ejs-es6.js (driver) | 4007 ms | 1050 | 29 615 | none | +| esprima-es6 | 4609 ms | 106 | 210 | none | +| lib/passes/desugar-classes | 120 ms | 68 | 68 | shapeCap 1 | +| escodegen-es6 | 68 ms | 166 | 231 | shapeCap 1 | +| lib/eir/ops | 66 ms | 212 | 212 | none | +| lib/eir/optimize | 39 ms | 14 | 14 | none | +| lib/eir/lower | 29 ms | 115 | 115 | shapeCap 1 | +| lib/compiler | 10 ms | 74 | 74 | shapeCap 1 | + +Aggregates (n=38 modules): analysis wall median 3 ms / p90 68 ms / max +4609 ms / **total 9.1 s**. Real time 15.28 s flag-on vs 5.73 s flag-off +(+9.6 s; esprima-es6 + the ejs-es6 driver account for 8.6 s of it). Max +RSS 575 MB (was 287 MB) — well under the 6 GB watch line (raised from +Phase 0's 4 GB for this run). Totals: +unknownCalls 202, degradedBindings 136. + +**Cap behavior (now observable):** stateCap (512): **0 hits anywhere** — +including the 29 615-iteration driver analysis. shapeCap (64): exactly +**1 hit in each of 10 modules** (triple, abi, compiler, eir/emit, +eir/builder, eir/lower, eir/scopes, escodegen, estraverse, desugar-classes) +— one megamorphic collapse per module, consistent with a single object +built up field-by-field under weak updates. Convergence is natural, not +cap-forced, everywhere it matters. + +**Remaining rejects (7, was 30):** 6 × "only plain identifier or +destructuring-pattern parameters" + 1 × `Object.defineProperty` non-literal +key (lib/runtime). Root cause of the 6, identified by inspection: echojs's +`DesugarDestructuring` keeps a trailing **`RestElement` in `params`** ("a +trailing ...rest stays in place — EIR handles it natively", +lib/passes/desugar-destructuring.ts:244) — maam's `compileFunction` accepts +the old-esprima `.rest` *field* but not a RestElement param. A one-line +coverage item (treat a trailing RestElement param exactly like the dialect +`rest` field); affected: ast-builder, node-visitor, consts, +desugar-metaproperties, desugar-spread, desugar-destructuring. + +## Corpus A — test/*.js (457 files, full rerun) + +| class | Phase 0 | now | Δ | +|---|---|---|---| +| analyzed, degraded-with-warning | 362 | 391 | +29 | +| analysis-failed (warn-wrapped) | 84 | 55 | −29 | +| analyzed, clean | 10 | 10 | — | +| TIMEOUT | 0 | 0 | — | +| compile-N/A (tester.js, flag-independent) | 1 | 1 | — | + +Zero `--types`-caused compile failures again (only tester.js exits +non-zero, identically flag-off). Remaining reject histogram: param-kind 28 +(the same RestElement gap as Corpus B), LabeledStatement 8, defineProperty +non-literal key 5, computed object keys 5, getters/setters 3, misc 6. +TemplateLiteral, ForOfStatement, TaggedTemplate, and +destructuring-declaration rejects are **gone** (22 + 7 + 3 + the pattern +share of the old 26-count bucket in the Phase 0 histogram). + +Wall time is unchanged: analysis per module (n=442) median 6 ms / p90 +13 ms / max 5105 ms (esprima again) / total 21.0 s; per-file compile wall +median 334 ms (was 333), p90 362, max 7.2 s. Cap hits: shapeCap 1 in 6 +modules across the 3 esprima-importing files; stateCap 0 everywhere. + +## unknownCalls / degradedBindings deltas (S1 caveat quantified) + +- Corpus A total unknownCalls 2694 → 2935 (+241). Decomposition: **+218 + from the 29 newly-analyzed files** (code the engine never saw before — + console/stdlib externals plus iterator-protocol degradations; not + separable per-kind in current metrics); **+36 across 9 of the 372 + previously-analyzed files — all increases** (set3 +17, array30 +7, + typedarray10 +4, … — none containing for-of; this is ⊤-propagation + reaching branches a false `undefined` used to kill). The **−13 is a + double-count correction**, not a decrease on any file: eir-promo1.js was + analysis-failed in Phase 0 but had emitted partial stats (13 unknownCalls + already inside the 2694 total), and its full re-count now sits inside the + +218 bucket. 2694 + 218 + 36 − 13 = 2935. +- Corpus B: the 15 previously-analyzed modules are **stable — zero changed + unknownCalls**; the +128 rides on the 23 newly-analyzed modules (driver + 98, lib/types 26, everything else ≤2). +- **S1 (closure-fingerprint iteration degrade): no measurable inflation on + previously-analyzed code in either corpus.** The feared + for-of-over-function-arrays cost did not surface at corpus scale; if + per-kind attribution is ever needed, a degradation-kind counter is the + follow-up. +- degradedBindings: 0 → 66 (Corpus A) / 136 (Corpus B) — now counting + unmodeled imports and rest parameters as designed; an imports-only module + no longer masquerades as a closed world. + +## Reading against the decision rule + +- **The Phase 0 open question is closed: outcome (a) — ship as-is behind + `--types`.** Compiler-sized modules reach the engine and converge + naturally: 0 stateCap hits corpus-wide, shapeCap touched exactly once in + each of 10 of the 38 modules, the largest analysis (29 615 iterations) + finishes in 4 s, total + self-compile overhead +9.6 s on an opt-in flag, RSS 575 MB. No evidence + for (b) heavy-widening or (c) non-convergence anywhere in either corpus. +- Where time goes is unchanged in kind: esprima-es6 (wall-heavy, + state-light — store-join cost hypothesis stands) plus, now, the ejs-es6 + driver (iteration-heavy, converges clean). Everything else ≤120 ms. +- The binding constraint has shrunk from "three constructs blocking every + big module" to **one one-line gap (RestElement params) plus a small + tail** (labels, non-literal defineProperty keys, computed keys, + accessors-in-literals) — with only the RestElement gap blocking any + module of consequence. diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index 1bea5def..1e09ffd0 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit 1bea5defd5c2a19d81bc544a167355b996aae849 +Subproject commit 1e09ffd07e73ab8ed547fcb49106c31789a6d168 From 2ca16988b54b961f727d962af8c01f9562a46c19 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 21 Jul 2026 15:28:16 -0700 Subject: [PATCH 085/146] eir: TypeOracle + --types-dump; Phase 1 complete Submodule pin -> 8d6a157 (node-identity nodeTypes()/typeOfNode() with documented join semantics and splice poisoning; trailing-RestElement params accepted -- self-compile now analyzes 44/45 modules). lib/eir/oracle.ts grows the consumer surface the plan specifies: TypeTag/EirType/TypeOracle, with TypeSig parsing pinned by unit tests in //:test-eir (real maam alphabet num/str/bool/null/undefined/fn/obj; top/never/missing and ANY unrecognized constituent -> "top", never a guess). closedWorld() requires both unknownCalls and degradedBindings be zero (the plan text predates the second counter). The probe returns the oracle per module; nothing in codegen consumes it until Phase 3. --types-dump (auto-enables --types) prints one line per declaration- site binding identifier -- declarator ids incl. pattern leaves, function names, params, both rest forms -- keyed strictly on per-site nodes: %-named identifiers and the lib/common-ids singleton objects are skipped (identity set), duplicates guarded, output deterministic. Stats line gains machine-parseable stateCapHits/stateCapFuncs/ shapeCapHits. P1 gate: the eir-toplevel1.js dump was hand-checked twice independently (worker predicted-then-ran; reviewer re-derived from source before running) -- 16/16 rows, no unsound entry; the only top rows are the two predicted degradation classes (unreached .map callback under intrinsics=false; cross-module-unlinked lib function param). Pattern-file check: object-pattern leaves precise, pattern defaults join num|undefined per the documented reassignment-widening, array-pattern leaves are top in ALL positions (declaration, param, assignment) because DesugarDestructuring routes every array pattern through %createIteratorWrapper before the probe -- maam's native pattern paths are unreachable from real echojs trees and live only in its test suite; modeling that intrinsic is the next precision win. Verified: tsc clean; //:test-eir green incl. new mapping tests; full matrix green; flag-on/off executables byte-identical (same-dir cmp); broken-dist and self-hosted degradation paths intact. Co-Authored-By: Claude Fable 5 --- docs/maam-plan.md | 19 +++- ejs-es6.ts | 7 +- external-deps/echojs-maam | 2 +- lib/compiler.ts | 12 +- lib/eir/oracle.ts | 224 +++++++++++++++++++++++++++++++++++--- lib/eir/tests.ts | 24 ++++ lib/options.ts | 8 +- 7 files changed, 270 insertions(+), 26 deletions(-) diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 24981af0..12531446 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -357,13 +357,30 @@ Smaller forward items surfaced by the Chunk A integration review: without crashing (node-hosted dev tree — buck work trees have no `external-deps/`, so `--types` there warns-and-skips by design); convergence/timing numbers recorded in the PR. -- [ ] **P1** maam: ⊤-degradation + `nodeTypes()`/`typeOfNode()` (node-identity +- [x] **P1** maam: ⊤-degradation + `nodeTypes()`/`typeOfNode()` (node-identity keyed); echojs: `TypeOracle` + `--types-dump`. Per the P0 results, P1 should FRONT-LOAD maam normalizer coverage for TemplateLiteral, ForOfStatement, and destructuring/defaults/rest params (these block every compiler-sized module), surface cap-hit counters in `metrics` (saturation is currently unobservable), then re-run the P0 measurement to close the convergence question. + *Done 2026-07-21* (maam 8d6a157; echojs this commit). Convergence + question CLOSED: outcome (a) — compiler-sized modules converge + naturally (0 stateCap hits; self-compile analyzes 44/45 modules, sole + remainder lib/runtime's non-literal defineProperty key); numbers in + docs/maam-p0-results.md. Oracle contract notes: `typeOfNode` on a + node mapped to a declared variable reports the join over the + variable's whole lifetime (reassignment-widening — sound, not + value-at-site); spliced/shared node objects are poisoned to + `undefined` (consumer degrades to ⊤); `closedWorld()` requires BOTH + `unknownCalls` and `degradedBindings` zero. Known ⊤ classes on real + trees: unmodeled imports, unknown intrinsics/method calls + (intrinsics=false), unreached code, and array patterns in ALL + positions (declaration, param, assignment) — DesugarDestructuring + routes every array pattern through `%createIteratorWrapper` before + the probe, so maam's native pattern paths are exercised only by its + own tests; modeling that intrinsic (or reordering the desugar) is the + obvious next precision win for P2/P3. *Gate:* maam suite green (incl. new node-identity tests); matrix green; hand-checked oracle dump for `test/eir-toplevel1.js`. - [ ] **P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; diff --git a/ejs-es6.ts b/ejs-es6.ts index d143bf9c..1ce1c720 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -109,6 +109,7 @@ const options: CompilerOptions = { frozen_global: false, record_types: false, types: false, + types_dump: false, output_filename: null, show_help: false, leave_temp_files: false, @@ -253,7 +254,11 @@ const args: Record = { }, "--types": { flag: "types", - help: "run the MAAM type-analysis probe over each module and log its stats (phase 0: consumes nothing).", + help: "run the MAAM type-analysis probe over each module and log its stats (consumes nothing yet).", + }, + "--types-dump": { + flag: "types_dump", + help: "with the MAAM analysis, print each binding's inferred type (implies --types).", }, "--frozen-global": { flag: "frozen_global", diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index 1e09ffd0..8d6a1575 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit 1e09ffd07e73ab8ed547fcb49106c31789a6d168 +Subproject commit 8d6a15751e198cd1f87bc16321acefae434d1c6e diff --git a/lib/compiler.ts b/lib/compiler.ts index 46e86cad..15fcd3a1 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -687,11 +687,13 @@ export function compile( // pipelines see their %-intrinsic output tree = pre_eir_convert(tree, module_filename, module_infos, options); - // --types (MAAM phase 0, docs/maam-plan.md): probe-only type - // analysis over the desugared toplevel. Must run before - // collectEIRToplevel, which consumes (and then empties) the toplevel - // body. Logs stats; consumes nothing; never fails the compile. - if (options.types) runTypeAnalysisProbe(tree, source_filename); + // --types (MAAM, docs/maam-plan.md): type analysis over the desugared + // toplevel. Must run before collectEIRToplevel, which consumes (and + // then empties) the toplevel body. Logs stats (and, for --types-dump, + // per-binding types); the returned TypeOracle is not consumed by + // codegen yet (Phase 3); never fails the compile. + if (options.types || options.types_dump) + runTypeAnalysisProbe(tree, source_filename, options.types_dump); // EIR is the only pipeline: a module that can't lower is a compile // error, not a fallback diff --git a/lib/eir/oracle.ts b/lib/eir/oracle.ts index 3d769b26..b4180f4d 100644 --- a/lib/eir/oracle.ts +++ b/lib/eir/oracle.ts @@ -2,12 +2,13 @@ * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// Phase 0 of the MAAM type-oracle integration (docs/maam-plan.md): a -// plumbing probe. With --types on, compile() hands us the desugared -// toplevel BEFORE collectEIRToplevel consumes it; we wrap its body as a -// Program (preserving node identity — the eventual oracle is keyed on -// the exact node objects), run the echojs-maam abstract interpreter -// over it, and log its stats. Nothing downstream reads the result yet. +// The MAAM type oracle (docs/maam-plan.md). With --types on, compile() +// hands us the desugared toplevel BEFORE collectEIRToplevel consumes it; +// we wrap its body as a Program (preserving node identity — the oracle +// is keyed on the exact node objects), run the echojs-maam abstract +// interpreter over it, log its stats, and (Phase 1) return a TypeOracle +// over the result. Nothing in codegen consumes it yet (Phase 3); +// --types-dump prints per-binding types for hand-checking. // // Two hard rules, both load-bearing: // - maam is require()d lazily, only when the probe actually runs, so @@ -21,6 +22,7 @@ import * as path from "@node-compat/path"; import * as fs from "@node-compat/fs"; import type * as e from "../estree"; import { reportWarning } from "../errors"; +import * as commonIds from "../common-ids"; // The slice of maam's AnalysisResult the probe consumes, typed // structurally so we never import (or resolve types from) the @@ -33,12 +35,18 @@ interface MaamMetrics { unknownCalls: number; // added alongside this integration; absent in older builds degradedBindings?: number; + stateCapHits?: number; + stateCapFuncs?: number; + shapeCapHits?: number; } interface MaamResult { metrics: MaamMetrics; describe(): string; warnings(): Array<{ kind: string }>; + // Phase 1 node-identity oracle: joined TypeSig ("num", "num|str", "⊤", …) + // for the exact node object, undefined for unreached/unmapped nodes. + typeOfNode(n: unknown): string | undefined; } interface MaamModule { @@ -112,13 +120,186 @@ function warningSummary(warnings: Array<{ kind: string }>): string { return [...counts.entries()].map(([kind, n]) => `${kind}:${n}`).join(","); } +// --- the TypeOracle contract (docs/maam-plan.md, "The interface contract") -- + +export type TypeTag = "number" | "string" | "boolean" | "undefined" | "null" | "object" | "closure"; + +export interface EirType { + // "top" = no information + tags: ReadonlySet | "top"; +} + +export interface TypeOracle { + // type of the value an expression node evaluates to (join over all + // reached contexts); "top" when unknown/unanalyzed + typeOfNode(n: e.Node): EirType; + // required before any UNguarded consumption (guarded fast paths don't + // need it) + closedWorld(): boolean; + describe(): string; // stats line for --types logging +} + +const TAG_BY_SIG: Record = { + num: "number", + str: "string", + bool: "boolean", + undefined: "undefined", + null: "null", + obj: "object", + fn: "closure", +}; + +// Map a maam TypeSig ("num", "num|str", "⊤", "never", …) to an EirType. +// Anything we do not positively recognize — including a missing sig and any +// unrecognized constituent a future maam might add — is "top": the oracle +// never guesses. Exported for the unit tests in lib/eir/tests.ts. +export function typeSigToEirType(sig: string | undefined): EirType { + if (sig === undefined || sig === "⊤" || sig === "never") return { tags: "top" }; + const tags = new Set(); + for (const part of sig.split("|")) { + const tag = TAG_BY_SIG[part]; + if (tag === undefined) return { tags: "top" }; + tags.add(tag); + } + return { tags }; +} + +// The common-ids singleton identifier nodes (ONE object each, spliced into +// many sites by the desugar passes). Node-identity oracle queries on them +// would be ambiguous; the dump skips them outright (maam's ambiguity poison +// backstops any that slip through elsewhere). +let cached_singletons: Set | null = null; +function singletonIdentifiers(): Set { + if (!cached_singletons) { + cached_singletons = new Set( + Object.values(commonIds).filter( + (v) => typeof v === "object" && v !== null && (v as { type?: string }).type === "Identifier" + ) + ); + } + return cached_singletons; +} + +// Collect the DECLARATION-site binding identifiers of the wrapped program: +// variable-declarator ids (incl. pattern leaves), function-declaration names, +// and parameters (identifiers, pattern leaves, rest — both the RestElement +// and old-dialect `rest`-field forms). These are minted per-site by the +// parser/desugars, so they are safe node-identity keys — except the +// singletons and %-named internals, which are skipped, and any node object +// encountered twice, which is a splice and skipped too. +function collectDeclarationIds(program: { body: e.Statement[] }): e.Identifier[] { + const out: e.Identifier[] = []; + const patternLeaves = (p: unknown): void => { + if (!p || typeof p !== "object") return; + const node = p as { type?: string }; + switch (node.type) { + case "Identifier": + out.push(node as e.Identifier); + return; + case "ObjectPattern": + for (const prop of (node as unknown as { properties: unknown[] }).properties) { + const pr = prop as { type?: string; value?: unknown; argument?: unknown }; + if (pr.type === "Property") patternLeaves(pr.value); + else patternLeaves(pr.argument); + } + return; + case "ArrayPattern": + for (const el of (node as unknown as { elements: unknown[] }).elements) patternLeaves(el); + return; + case "AssignmentPattern": + return patternLeaves((node as unknown as { left: unknown }).left); + case "RestElement": + case "SpreadElement": + return patternLeaves((node as unknown as { argument: unknown }).argument); + default: + return; + } + }; + const walk = (n: unknown): void => { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (const x of n) walk(x); + return; + } + const node = n as Record & { type?: string }; + if (typeof node.type === "string") { + if (node.type === "VariableDeclarator") patternLeaves(node.id); + else if (node.type === "FunctionDeclaration" && node.id) patternLeaves(node.id); + if ( + node.type === "FunctionDeclaration" || + node.type === "FunctionExpression" || + node.type === "ArrowFunctionExpression" + ) { + for (const p of (node.params as unknown[]) ?? []) patternLeaves(p); + if (node.rest) patternLeaves(node.rest); // old-dialect rest field + } + } + for (const key of Object.keys(node)) { + if (key === "loc" || key === "range") continue; + walk(node[key]); + } + }; + walk(program); + + const singletons = singletonIdentifiers(); + const seen = new Set(); + const dupes = new Set(); + for (const ident of out) { + if (seen.has(ident)) dupes.add(ident); // spliced node: ambiguous key + seen.add(ident); + } + return out.filter( + (ident) => !dupes.has(ident) && !singletons.has(ident) && !ident.name.startsWith("%") + ); +} + +function locOf(ident: e.Identifier): { line: number; col: number } | null { + const loc = (ident as { loc?: { start?: { line: number; column: number } } }).loc; + if (loc && loc.start) return { line: loc.start.line, col: loc.start.column + 1 }; + return null; +} + +// Print one line per declaration-site binding: name, source position when the +// node has one (synthetic desugar nodes may not), and the raw maam TypeSig +// ("(unmapped→⊤)" for nodes the analysis never saw). Sorted by position, +// synthetic nodes last, ties broken by name then collection order. +function dumpBindingTypes( + result: MaamResult, + program: { body: e.Statement[] }, + source_filename: string +): void { + const ids = collectDeclarationIds(program); + const rows = ids.map((ident, index) => ({ ident, index, loc: locOf(ident) })); + rows.sort((a, b) => { + if (a.loc && b.loc) + return a.loc.line - b.loc.line || a.loc.col - b.loc.col || + a.ident.name.localeCompare(b.ident.name) || a.index - b.index; + if (a.loc) return -1; + if (b.loc) return 1; + return a.ident.name.localeCompare(b.ident.name) || a.index - b.index; + }); + for (const row of rows) { + const sig = result.typeOfNode(row.ident); + const where = row.loc ? `${row.loc.line}:${row.loc.col}` : "synthetic"; + console.warn( + `--types-dump: ${source_filename}: ${row.ident.name} @${where} : ${sig ?? "(unmapped→⊤)"}` + ); + } +} + // Run the probe over the module's desugared tree. `tree` is the // post-pre_eir_convert Program whose body[0] is the synthetic toplevel // FunctionDeclaration (insert_toplevel_func) holding the module's -// statements. -export function runTypeAnalysisProbe(tree: e.Program, source_filename: string): void { +// statements. Returns a TypeOracle over the analysis (so compile() can +// thread it onward — Phase 3), or null when anything degraded; callers +// must treat null as "no type information", never as an error. +export function runTypeAnalysisProbe( + tree: e.Program, + source_filename: string, + dump = false +): TypeOracle | null { const maam = loadMaam(source_filename); - if (!maam) return; + if (!maam) return null; const toplevel = tree.body[0]; if (!toplevel || toplevel.type !== "FunctionDeclaration") { @@ -126,7 +307,7 @@ export function runTypeAnalysisProbe(tree: e.Program, source_filename: string): "--types: expected the synthetic toplevel FunctionDeclaration; type analysis skipped.", source_filename ); - return; + return null; } // Same body array, same node objects — no cloning. @@ -140,18 +321,31 @@ export function runTypeAnalysisProbe(tree: e.Program, source_filename: string): ); const wall = Date.now() - started; const m = result.metrics; - console.warn( + const statsLine = `--types: ${source_filename}: wall=${wall}ms reachedStates=${m.reachedStates} ` + - `configs=${m.configs} iterations=${m.iterations} shapesInterned=${m.shapesInterned} ` + - `unknownCalls=${m.unknownCalls} degradedBindings=${m.degradedBindings ?? 0} ` + - `warnings=${warningSummary(result.warnings())}` - ); + `configs=${m.configs} iterations=${m.iterations} shapesInterned=${m.shapesInterned} ` + + `unknownCalls=${m.unknownCalls} degradedBindings=${m.degradedBindings ?? 0} ` + + `stateCapHits=${m.stateCapHits ?? 0} stateCapFuncs=${m.stateCapFuncs ?? 0} ` + + `shapeCapHits=${m.shapeCapHits ?? 0} warnings=${warningSummary(result.warnings())}`; + console.warn(statsLine); console.warn(result.describe()); + if (dump) dumpBindingTypes(result, program as { body: e.Statement[] }, source_filename); + + return { + typeOfNode: (n) => typeSigToEirType(result.typeOfNode(n)), + // The plan text gates closedWorld() on unknownCalls alone because it + // predates the degradedBindings counter (unmodeled imports, rest + // params — Chunks A/D). Both must be zero: either one means some + // value in the store is a stand-in, not a fact. + closedWorld: () => m.unknownCalls === 0 && (m.degradedBindings ?? 0) === 0, + describe: () => statsLine, + }; } catch (err) { const wall = Date.now() - started; reportWarning( `--types: analysis failed after ${wall}ms (${errorMessage(err)}); continuing without type information.`, source_filename ); + return null; } } diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index c996c926..ebca0aaa 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -15,6 +15,7 @@ import { optimizeFunction } from "./optimize"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; +import { typeSigToEirType } from "./oracle"; import { DesugarClasses } from "../passes/desugar-classes"; import { DesugarDestructuring } from "../passes/desugar-destructuring"; import { DesugarGeneratorFunctions } from "../passes/desugar-generator-functions"; @@ -1017,6 +1018,29 @@ test("optimize: DCE removes unused pure chains but keeps effects", () => { assertContains(printed, "get_prop_atom"); }); +// --- oracle: TypeSig -> EirType mapping ----------------------------------------- + +test("oracle: TypeSig constituents map to EirType tags", () => { + const t = typeSigToEirType("num|str"); + assert(t.tags !== "top"); + const tags = t.tags as ReadonlySet; + assert(tags.size === 2 && tags.has("number") && tags.has("string")); + const all = typeSigToEirType("num|str|bool|null|undefined|fn|obj").tags as ReadonlySet; + assert(all.size === 7 && all.has("closure") && all.has("object") && all.has("null")); +}); + +test("oracle: top, never, and missing sigs are all top", () => { + assert(typeSigToEirType("\u22a4").tags === "top"); + assert(typeSigToEirType("never").tags === "top"); + assert(typeSigToEirType(undefined).tags === "top"); +}); + +test("oracle: an unrecognized constituent is top, never a guess", () => { + assert(typeSigToEirType("num|widget").tags === "top"); + assert(typeSigToEirType("bigint").tags === "top"); + assert(typeSigToEirType("").tags === "top"); +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/lib/options.ts b/lib/options.ts index 8f114749..98184424 100644 --- a/lib/options.ts +++ b/lib/options.ts @@ -22,10 +22,12 @@ export interface CompilerOptions { warn_on_undeclared: boolean; frozen_global: boolean; record_types: boolean; - // MAAM phase-0 probe (docs/maam-plan.md): run the type analysis and - // log stats; consumes nothing. Distinct from record_types (the - // runtime type-recording instrumentation). + // MAAM type-analysis probe (docs/maam-plan.md): run the analysis and + // log stats; codegen consumes nothing yet. Distinct from record_types + // (the runtime type-recording instrumentation). types: boolean; + // --types plus a per-binding type dump (implies types). + types_dump: boolean; output_filename: string | null; show_help: boolean; leave_temp_files: boolean; From 5ab679379e92bb0e044b0eefda89b1452c19913f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 21 Jul 2026 21:32:55 -0700 Subject: [PATCH 086/146] eir: Phase 2 -- the low tier: has_tag/unbox_f64/box_f64/f64_* emit + typing Inst.type gets its first real values. ops.ts grows per-op signatures ({params: ejsval|f64, result: any|f64|i1}) on the eight declared low-tier ops; the Inst constructor stamps its type from the sig; the printer shows typed defs as `%N: f64 = ...` (untyped output unchanged, byte-identical); the verifier enforces the flow rules -- f64/i1 flow only into their consumers, boxed values cannot enter raw slots, and raw f64/i1 may NOT cross block boundaries as edge args (Phase 3 diamonds rejoin boxed; documented and pinned). cond_br accepts i1 or the legacy "any" condition (to_boolean/prop_iter_next unchanged; LLVM rejects a non-i1 br loudly if anything slips). emit.ts implements the eight ops. has_tag "number" delegates to LLVMIRVisitor.isNumber -- icmp ult against EJSVAL_SHIFTED_TAG_INT32, inherited per-target; the runtime's int32 ejsval tag exists in the layout but is never minted and the threshold excludes it, so box/unbox as raw double bits is safe by construction. unboxDouble/ boxDouble live beside isNumber in compiler.ts via the cached bits_alloca idiom. node-llvm needed new FP bindings -- only createFAdd existed; createFSub/FMul/FDiv/FCmpOLT added (template-exact, operand order verified for the non-commutative pair). End-to-end proof: test/eir-lowtier1.js + EJS_EIR_LOWTIER=1 injects hand-built guarded diamonds (lib/eir/lowtier-probe.ts) for all four arithmetic ops + lt at integrate time (env unset = dead branch). The new //:test-eir-lowtier target compiles it plain and injected and asserts output parity (21 rows incl. 1/0=Infinity and 0/0=NaN, which only a real fdiv produces), binary divergence, and per-op IR presence -- which also detects a stale prebuilt llvm.node missing the new bindings. Falsifiability proven twice (corrupted expected; sabotaged IR assertion). NaN takes the fast path; strings/mixed route slow. Standalone target: the matrix line must name it explicitly. Also: 10 low-tier unit tests in lib/eir/tests.ts (printer, verifier accept/reject incl. block-arg and cond_br-f64, DCE of dead unbox/op/ box chains). Runtime backlog item discovered: _ejs_op_div aborts EJS_NOT_IMPLEMENTED on non-number LHS (ejs-ops.c ~901) while sub/mul coerce. Docs: P2 ticked; matrix line updated. Adversarially reviewed: bindings template-exact, NaN-box guard proven against the runtime encoding, verifier survived ill-typed construction attempts, coverage gap (sub/mul/div unexecuted) found and closed. Co-Authored-By: Claude Fable 5 --- BUCK | 11 ++ buck-test-lowtier.sh | 90 +++++++++++++ docs/maam-plan.md | 23 +++- lib/compiler.ts | 20 +++ lib/eir/emit.ts | 54 ++++++++ lib/eir/integrate.ts | 10 ++ lib/eir/ir.ts | 1 + lib/eir/lowtier-probe.ts | 148 +++++++++++++++++++++ lib/eir/ops.ts | 23 ++-- lib/eir/printer.ts | 7 +- lib/eir/tests.ts | 128 ++++++++++++++++++ lib/eir/verifier.ts | 41 ++++++ lib/llvm.d.ts | 5 + node-llvm/irbuilder.cpp | 56 ++++++++ node-llvm/irbuilder.h | 4 + test/eir-lowtier1.js | 36 +++++ test/expected/eir-lowtier1.js.expected-out | 21 +++ 17 files changed, 666 insertions(+), 12 deletions(-) create mode 100644 buck-test-lowtier.sh create mode 100644 lib/eir/lowtier-probe.ts create mode 100644 test/eir-lowtier1.js create mode 100644 test/expected/eir-lowtier1.js.expected-out diff --git a/BUCK b/BUCK index 3d02af3c..f0bc9277 100644 --- a/BUCK +++ b/BUCK @@ -96,6 +96,17 @@ genrule( "{ cat $OUT >&2; exit 1; }; tail -1 $OUT", ) +# the Phase 2 low-tier end-to-end probe: stage0-compile test/eir-lowtier1.js +# with EJS_EIR_LOWTIER=1 (hand-built low-tier bodies) and check output + +# emitted IR: buck2 build //:test-eir-lowtier +genrule( + name = "test-eir-lowtier", + srcs = ["buck-test-lowtier.sh"], + out = "test-eir-lowtier.log", + cmd = 'bash $SRCDIR/buck-test-lowtier.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location //test:files)" ' + llvm_bindir(), +) + # run the test suite against a stage: buck2 build //:test-stage3 # the output artifact is the full test log; the build fails if any test # fails. diff --git a/buck-test-lowtier.sh b/buck-test-lowtier.sh new file mode 100644 index 00000000..900d61ef --- /dev/null +++ b/buck-test-lowtier.sh @@ -0,0 +1,90 @@ +#!/bin/bash +# Invoked by //:test-eir-lowtier. Compiles test/eir-lowtier1.js twice with +# the stage0 (node-hosted) compiler — once plain, once with EJS_EIR_LOWTIER=1 +# (which swaps the lowtier_* function bodies for hand-built low-tier EIR, +# see lib/eir/lowtier-probe.ts) — runs both executables, and fails unless: +# - both outputs match the committed expected-out byte for byte; +# - the injected build actually differs from the plain one; and +# - the injected build's LLVM IR contains every low-tier float op +# (fadd/fsub/fmul/fdiv/fcmp olt) — so a silent injection no-op or a +# stale prebuilt llvm.node missing the FP bindings fails loudly. +set -euo pipefail + +TREE="$1" # //:srcdir-tree +GENERATED="$2" # //lib:generated +TEST_FILES="$3" # //test:files +LLVM_BIN="$4" # directory holding llc/opt + +REPO="${TMP%%/buck-out/*}" +OUT_ABS="$(cd "$(dirname "$OUT")" && pwd)/$(basename "$OUT")" + +WORK="$TMP/lowtier" +rm -rf "$WORK" +mkdir -p "$WORK" +cp -RL "$TREE"/. "$WORK/" +chmod -R u+w "$WORK" +mkdir -p "$WORK/lib/generated" +cp -RL "$GENERATED"/. "$WORK/lib/generated/" +mkdir -p "$WORK/test" +cp -RL "$TEST_FILES"/. "$WORK/test/" +chmod -R u+w "$WORK/test" + +export PATH="$LLVM_BIN:$PATH" +export NODE_PATH="$REPO/node_modules:$REPO/node-llvm/build/Release" +if [ "$(uname -s)" = "Darwin" ]; then + export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" +fi + +cd "$WORK/test" +EXPECTED=expected/eir-lowtier1.js.expected-out +EJS_ARGS=(--srcdir --moduledir ../node-compat --moduledir ../ejs-llvm) + +# NOTE: `run` is invoked in an `if` condition, which disables `set -e` +# inside it (the classic bash trap — an early version of this script +# printed OK over an aborting executable). Every step therefore checks +# its own status explicitly. +run() { + echo "== plain build ==" + node ../lib/generated/ejs-es6.js "${EJS_ARGS[@]}" eir-lowtier1.js \ + || { echo "ERROR: plain compile failed"; return 1; } + ./eir-lowtier1.js.exe > plain.out \ + || { echo "ERROR: plain executable failed"; return 1; } + diff -u "$EXPECTED" plain.out \ + || { echo "ERROR: plain output does not match expected"; return 1; } + cp eir-lowtier1.js.exe plain.exe + + echo "== injected build ==" + mkdir -p "$WORK/ltmp" + EJS_EIR_LOWTIER=1 TMPDIR="$WORK/ltmp" \ + node ../lib/generated/ejs-es6.js "${EJS_ARGS[@]}" --leave-temp eir-lowtier1.js \ + || { echo "ERROR: injected compile failed"; return 1; } + ./eir-lowtier1.js.exe > injected.out \ + || { echo "ERROR: injected executable failed"; return 1; } + diff -u "$EXPECTED" injected.out \ + || { echo "ERROR: injected output does not match expected"; return 1; } + + if cmp -s plain.exe eir-lowtier1.js.exe; then + echo "ERROR: injected binary is identical to the plain build (injection no-op?)" + return 1 + fi + + LL=$(ls "$WORK"/ltmp/eir-lowtier1.js.*.ll 2>/dev/null | head -1) + if [ -z "$LL" ]; then + echo "ERROR: no --leave-temp .ll found under $WORK/ltmp" + return 1 + fi + for pat in "fadd double" "fsub double" "fmul double" "fdiv double" "fcmp olt double"; do + if ! grep -q "$pat" "$LL"; then + echo "ERROR: '$pat' missing from $LL — the low tier was not emitted" + return 1 + fi + done + echo "lowtier e2e OK: outputs match expected, binaries differ, all f64 ops in the IR" +} + +if run > "$OUT_ABS" 2>&1; then + tail -1 "$OUT_ABS" +else + cat "$OUT_ABS" >&2 + exit 1 +fi diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 12531446..374a8aa0 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -211,7 +211,9 @@ Until promotion, `--types` in a stage1+ compiler is a no-op with a warning. ## Validation strategy -- **Bootstrap matrix, every phase:** `//:test-eir`, `//:test-stage0..3`. +- **Bootstrap matrix, every phase:** `//:test-eir`, `//:test-eir-lowtier` + (standalone — must be named explicitly; stage-green does not imply it + ran), `//:test-stage0..3`. stage2≡stage3 is a *functional* gate, not raw byte-identity (which fails on pristine HEAD from link metadata alone): stage2 and stage3 binaries, run in identical work dirs over a fixed corpus, must produce byte-identical @@ -383,9 +385,24 @@ Smaller forward items surfaced by the Chunk A integration review: obvious next precision win for P2/P3. *Gate:* maam suite green (incl. new node-identity tests); matrix green; hand-checked oracle dump for `test/eir-toplevel1.js`. -- [ ] **P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; +- [x] **P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; `Inst.type` carries `"f64"`/`"i1"`. - *Gate:* `//:test-eir` green with new low-tier tests; matrix green. + *Gate:* `//:test-eir` green with new low-tier tests; matrix green — + the matrix line now includes `//:test-eir-lowtier` (standalone + target; it does NOT ride the stage targets), which compiles + test/eir-lowtier1.js plain + under `EJS_EIR_LOWTIER=1` injection and + asserts output parity, binary divergence, and per-op IR presence + (fadd/fsub/fmul/fdiv/fcmp olt) — also a stale-llvm.node detector. + *Done 2026-07-21.* Notes: node-llvm needed new FP bindings + (createFSub/FMul/FDiv/FCmpOLT — only FAdd existed); `has_tag + "number"` delegates to LLVMIRVisitor.isNumber (icmp ult against + EJSVAL_SHIFTED_TAG_INT32 — the int32 tag exists in the ejsval layout + but is never minted, and the threshold excludes it, so + unbox-as-raw-double is safe by construction); raw f64/i1 may NOT + cross block boundaries as edge args (Phase 3 diamonds rejoin boxed); + cond_br accepts i1 or legacy "any" conditions. Runtime backlog item + found: `_ejs_op_div` aborts EJS_NOT_IMPLEMENTED on non-number LHS + (ejs-ops.c ~901) — sub/mul coerce, div doesn't. - [ ] **P3** oracle-guided guarded arithmetic in `LowerFunction.binary`, `--types`-gated. *Gate:* matrix green + stage2≡stage3 functional gate (flag off); diff --git a/lib/compiler.ts b/lib/compiler.ts index 15fcd3a1..c91b511d 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -615,6 +615,26 @@ class LLVMIRVisitor implements VisitorSurface { createEjsvalICmpULt(arg: llvm.Value, i64_const: llvm.Constant, name: string): llvm.Value { return ir.createICmpULt(this.getEjsvalBits(arg), i64_const, name); } + // The low tier's NaN-box transfers. Doubles are stored RAW in the + // ejsval (see storeDouble): unbox/box are pure bit reinterpretations + // through the same cached alloca getEjsvalBits uses. Target layout + // knowledge stays here, beside isNumber. + unboxDouble(val: llvm.Value): llvm.Value { + const fn = this.currentFunction!; + const alloca = fn.bits_alloca ?? this.createAlloca(fn, types.EjsValue, "bits_alloca"); + ir.createStore(val, alloca); + const dbl_ptr = ir.createBitCast(alloca, types.Double.pointerTo(), "dbl_ptr"); + if (!fn.bits_alloca) fn.bits_alloca = alloca; + return ir.createLoad(types.Double, dbl_ptr, "unboxed_f64"); + } + boxDouble(dbl: llvm.Value): llvm.Value { + const fn = this.currentFunction!; + const alloca = fn.bits_alloca ?? this.createAlloca(fn, types.EjsValue, "bits_alloca"); + const dbl_ptr = ir.createBitCast(alloca, types.Double.pointerTo(), "dbl_ptr"); + ir.createStore(dbl, dbl_ptr); + if (!fn.bits_alloca) fn.bits_alloca = alloca; + return ir.createLoad(types.EjsValue, alloca, "boxed_f64"); + } isNumber(val: llvm.Value): llvm.Value { if (this.triple.pointerSize() === 64) { return this.createEjsvalICmpULt( diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 873c3087..0d4b325a 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -35,6 +35,10 @@ export interface VisitorSurface { createEjsValueLoad(value: llvm.Value, name: string): llvm.Value; emitEjsvalFromPtr(ptr: llvm.Value, prefix: string): llvm.Value; isNumber(val: llvm.Value): llvm.Value; + // the low tier's NaN-box transfers (implemented beside isNumber in + // compiler.ts so all target-layout knowledge stays in one place) + unboxDouble(val: llvm.Value): llvm.Value; + boxDouble(dbl: llvm.Value): llvm.Value; loadBoolEjsValue(n: boolean): llvm.Value; loadDoubleEjsValue(n: number): llvm.Value; loadNullEjsValue(): llvm.Value; @@ -469,6 +473,56 @@ export class EIREmitter { return; } + // --- the typed low tier (Phase 2) --------------------------- + // has_tag/unbox/box mirror LLVMIRVisitor's NaN-boxing helpers; + // the f64_* ops are plain LLVM float arithmetic. has_tag and + // f64_lt produce machine i1 (consumed by cond_br, like + // to_boolean); unbox produces a raw double; box re-enters the + // boxed world. + case "has_tag": { + const tag = inst.imms["tag"]; + if (tag !== "number") + throw new Error(`EIR emit: has_tag tag '${String(tag)}' is not supported`); + this.values.set(inst, this.v.isNumber(this.val(inst.operands[0]))); + return; + } + case "unbox_f64": + this.values.set(inst, this.v.unboxDouble(this.val(inst.operands[0]))); + return; + case "box_f64": + this.values.set(inst, this.v.boxDouble(this.val(inst.operands[0]))); + return; + case "f64_add": + this.values.set( + inst, + ir.createFAdd(this.val(inst.operands[0]), this.val(inst.operands[1]), "f64_add") + ); + return; + case "f64_sub": + this.values.set( + inst, + ir.createFSub(this.val(inst.operands[0]), this.val(inst.operands[1]), "f64_sub") + ); + return; + case "f64_mul": + this.values.set( + inst, + ir.createFMul(this.val(inst.operands[0]), this.val(inst.operands[1]), "f64_mul") + ); + return; + case "f64_div": + this.values.set( + inst, + ir.createFDiv(this.val(inst.operands[0]), this.val(inst.operands[1]), "f64_div") + ); + return; + case "f64_lt": + this.values.set( + inst, + ir.createFCmpOLT(this.val(inst.operands[0]), this.val(inst.operands[1]), "f64_lt") + ); + return; + case "get_prop": { let callee = rt.object_getprop; return this.emitCallLike( diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 8426f6d7..11831c8a 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -28,6 +28,7 @@ import { isLowerNotSupported } from "./errors"; import { Module } from "./ir"; import { FunctionBuilder } from "./builder"; import { verifyModule } from "./verifier"; +import { injectLowTierProbes } from "./lowtier-probe"; import { optimizeModule } from "./optimize"; import { printModule } from "./printer"; import type * as e from "../estree"; @@ -398,6 +399,15 @@ export function collectEIRToplevel( // the module in place) if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); + // testing: EJS_EIR_LOWTIER=1 swaps the bodies of the lowtier_* + // probe functions (test/eir-lowtier1.js) for hand-built low-tier + // EIR, so the Phase 2 ops can be executed end to end before + // lowering emits them (Phase 3). Same mold as EJS_NO_EIR_OPT. + if (process.env["EJS_EIR_LOWTIER"]) { + const n = injectLowTierProbes(eir_module); + if (n > 0) verifyModule(eir_module); + } + // debugging/measurement: EJS_NO_EIR_OPT=1 disables the EIR // optimizer without touching the LLVM pass pipeline (-O0 changes // both), mirroring the EJS_NO_PROMOTE bisect hook diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts index c94ce769..0ded3a85 100644 --- a/lib/eir/ir.ts +++ b/lib/eir/ir.ts @@ -189,6 +189,7 @@ export class Inst { throw new Error( `EIR: '${op}' expects ${info.arity} operands, got ${this.operands.length}` ); + if (info.sig) this.type = info.sig.result; // the low tier's typed results } addTarget(block: Block, args?: (Inst | null)[], kind?: TargetKind): void { diff --git a/lib/eir/lowtier-probe.ts b/lib/eir/lowtier-probe.ts new file mode 100644 index 00000000..7421f15f --- /dev/null +++ b/lib/eir/lowtier-probe.ts @@ -0,0 +1,148 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Hand-built low-tier bodies for the Phase 2 end-to-end test. Lowering does +// not emit has_tag/unbox_f64/f64_*/box_f64 yet (that's Phase 3), so to prove +// the emitted machine code is correct we substitute known bodies into the +// functions of test/eir-lowtier1.js, gated on EJS_EIR_LOWTIER=1 (a debug/test +// hook in the EJS_NO_EIR_OPT mold). With the variable unset nothing here +// runs; the test file behaves identically either way, so it also passes in +// the normal matrix. +// +// The shape built here is exactly the Phase 3 guarded diamond: has_tag both +// operands -> fast block (unbox / f64 op / box) vs slow block (the generic +// op), joining in a BOXED block parameter (raw f64/i1 never crosses a block +// boundary; the verifier enforces that). + +import { FunctionBuilder } from "./builder"; +import { verifyFunction } from "./verifier"; +import type { Func, Module, Inst, Block } from "./ir"; + +// `function (a, b) { return a b; }` as the guarded diamond, +// parameterized over the fast f64 op and its generic slow-path twin. +export function buildArithDiamond(name: string, f64Op: string, genericOp: string): Func { + const fb = new FunctionBuilder(name, ["%env", "%this", "a", "b"]); + const a = fb.readVariable("a", fb.cur); + const b = fb.readVariable("b", fb.cur); + + const chk2 = fb.newBlock("chk2"); + const fast = fb.newBlock("fast"); + const slow = fb.newBlock("slow"); + const join = fb.newBlock("join"); + + const t1 = fb.emit("has_tag", [a], { tag: "number" }); + fb.condBr(t1, chk2, [], slow, []); + fb.sealBlock(chk2); + + fb.setInsertPoint(chk2); + const t2 = fb.emit("has_tag", [b], { tag: "number" }); + fb.condBr(t2, fast, [], slow, []); + fb.sealBlock(fast); + fb.sealBlock(slow); + + fb.setInsertPoint(fast); + const ua = fb.emit("unbox_f64", [a], {}); + const ub = fb.emit("unbox_f64", [b], {}); + const val = fb.emit(f64Op, [ua, ub], {}); + const boxed = fb.emit("box_f64", [val], {}); + fb.writeVariable("res", fast, boxed); + fb.br(join, []); + + fb.setInsertPoint(slow); + const generic = fb.emit(genericOp, [a, b], {}); + fb.writeVariable("res", slow, generic); + fb.br(join, []); + fb.sealBlock(join); + + fb.setInsertPoint(join); + fb.ret(fb.readVariable("res", join)); + + const fn = fb.finish(); + verifyFunction(fn); + return fn; +} + +export function buildLowTierAdd(name: string): Func { + return buildArithDiamond(name, "f64_add", "add"); +} + +// `function (a, b) { return a < b; }`: the fast arm branches on the +// raw i1 from f64_lt and rejoins with boxed booleans. +export function buildLowTierLt(name: string): Func { + const fb = new FunctionBuilder(name, ["%env", "%this", "a", "b"]); + const a = fb.readVariable("a", fb.cur); + const b = fb.readVariable("b", fb.cur); + + const chk2 = fb.newBlock("chk2"); + const fast = fb.newBlock("fast"); + const lt_true = fb.newBlock("lt_true"); + const lt_false = fb.newBlock("lt_false"); + const slow = fb.newBlock("slow"); + const join = fb.newBlock("join"); + + const t1 = fb.emit("has_tag", [a], { tag: "number" }); + fb.condBr(t1, chk2, [], slow, []); + fb.sealBlock(chk2); + + fb.setInsertPoint(chk2); + const t2 = fb.emit("has_tag", [b], { tag: "number" }); + fb.condBr(t2, fast, [], slow, []); + fb.sealBlock(fast); + fb.sealBlock(slow); + + fb.setInsertPoint(fast); + const ua = fb.emit("unbox_f64", [a], {}); + const ub = fb.emit("unbox_f64", [b], {}); + const lt = fb.emit("f64_lt", [ua, ub], {}); + fb.condBr(lt, lt_true, [], lt_false, []); + fb.sealBlock(lt_true); + fb.sealBlock(lt_false); + + fb.setInsertPoint(lt_true); + fb.writeVariable("res", lt_true, fb.constBool(true)); + fb.br(join, []); + + fb.setInsertPoint(lt_false); + fb.writeVariable("res", lt_false, fb.constBool(false)); + fb.br(join, []); + + fb.setInsertPoint(slow); + fb.writeVariable("res", slow, fb.emit("lt", [a, b], {})); + fb.br(join, []); + fb.sealBlock(join); + + fb.setInsertPoint(join); + fb.ret(fb.readVariable("res", join)); + + const fn = fb.finish(); + verifyFunction(fn); + return fn; +} + +const PROBES: Array<{ marker: string; build: (name: string) => Func }> = [ + { marker: "lowtier_add", build: (n) => buildArithDiamond(n, "f64_add", "add") }, + { marker: "lowtier_sub", build: (n) => buildArithDiamond(n, "f64_sub", "sub") }, + { marker: "lowtier_mul", build: (n) => buildArithDiamond(n, "f64_mul", "mul") }, + { marker: "lowtier_div", build: (n) => buildArithDiamond(n, "f64_div", "div") }, + { marker: "lowtier_lt", build: buildLowTierLt }, +]; + +// Swap the probe bodies into a lowered module, in place, preserving each +// function's name (make_closure references functions by name). +export function injectLowTierProbes(module: Module): number { + let injected = 0; + for (let i = 0; i < module.functions.length; i++) { + const fn = module.functions[i]!; + for (const probe of PROBES) { + if (fn.name.indexOf(probe.marker) === -1) continue; + module.functions[i] = probe.build(fn.name); + injected++; + break; + } + } + return injected; +} + +// re-exported for the unit tests' ill-typed-flow constructions +export type { Func, Inst, Block }; diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 33617074..260a0f19 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -28,6 +28,11 @@ export interface OpInfo { terminator?: boolean; // terminates its block when it carries explicit normal/unwind targets may_terminate?: boolean; + // typed signature (the low tier). params: what each operand slot + // accepts — "ejsval" (any boxed value; rejects f64/i1) or "f64". + // result: the Inst.type this op produces. Ops without a sig take and + // produce boxed ejsvals ("any"); the verifier enforces the flow rules. + sig?: { readonly params: readonly ("ejsval" | "f64")[]; readonly result: "any" | "f64" | "i1" }; } const E = Effect; @@ -166,14 +171,16 @@ export const OPS = { prop_iter_current: { arity: 1, effects: E.READ | E.GC }, // --- low tier --------------------------------------------------------------- - has_tag: { arity: 1, effects: E.NONE, imms: ["tag"] }, - unbox_f64: { arity: 1, effects: E.NONE }, - box_f64: { arity: 1, effects: E.GC }, - f64_add: { arity: 2, effects: E.NONE }, - f64_sub: { arity: 2, effects: E.NONE }, - f64_mul: { arity: 2, effects: E.NONE }, - f64_div: { arity: 2, effects: E.NONE }, - f64_lt: { arity: 2, effects: E.NONE }, + // imms.tag: the runtime tag tested; only "number" is emitted today + // (mirrors LLVMIRVisitor.isNumber, inheriting its per-target check) + has_tag: { arity: 1, effects: E.NONE, imms: ["tag"], sig: { params: ["ejsval"], result: "i1" } }, + unbox_f64: { arity: 1, effects: E.NONE, sig: { params: ["ejsval"], result: "f64" } }, + box_f64: { arity: 1, effects: E.GC, sig: { params: ["f64"], result: "any" } }, + f64_add: { arity: 2, effects: E.NONE, sig: { params: ["f64", "f64"], result: "f64" } }, + f64_sub: { arity: 2, effects: E.NONE, sig: { params: ["f64", "f64"], result: "f64" } }, + f64_mul: { arity: 2, effects: E.NONE, sig: { params: ["f64", "f64"], result: "f64" } }, + f64_div: { arity: 2, effects: E.NONE, sig: { params: ["f64", "f64"], result: "f64" } }, + f64_lt: { arity: 2, effects: E.NONE, sig: { params: ["f64", "f64"], result: "i1" } }, call_runtime: { arity: -1, effects: GENERIC_OP, imms: ["name"] }, // --- control flow -------------------------------------------------------------- diff --git a/lib/eir/printer.ts b/lib/eir/printer.ts index 86354754..f4176097 100644 --- a/lib/eir/printer.ts +++ b/lib/eir/printer.ts @@ -88,7 +88,12 @@ export function printInst(inst: Inst, nameOf: NameOf): string { text += " -> " + inst.targets.map((t) => printTarget(t, nameOf)).join(", "); } - if (producesValue) return `${nameOf(inst)} = ${text}`; + // typed defs (the low tier) print their type; "any" stays bare so all + // existing output is byte-identical + if (producesValue) + return inst.type === "any" + ? `${nameOf(inst)} = ${text}` + : `${nameOf(inst)}: ${inst.type} = ${text}`; return text; } diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index ebca0aaa..9a12ce53 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -16,6 +16,7 @@ import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; import { typeSigToEirType } from "./oracle"; +import { buildArithDiamond, buildLowTierAdd, buildLowTierLt } from "./lowtier-probe"; import { DesugarClasses } from "../passes/desugar-classes"; import { DesugarDestructuring } from "../passes/desugar-destructuring"; import { DesugarGeneratorFunctions } from "../passes/desugar-generator-functions"; @@ -1018,6 +1019,133 @@ test("optimize: DCE removes unused pure chains but keeps effects", () => { assertContains(printed, "get_prop_atom"); }); +// --- the typed low tier (Phase 2) ------------------------------------------------ + +function assertVerifyFails(fn: Func, needle: string): void { + try { + verifyFunction(fn); + } catch (err) { + const msg = (err as Error).message; + if (msg.indexOf(needle) === -1) + throw new Error(`verifier failed, but with '${msg}' (wanted '${needle}')`); + return; + } + throw new Error(`verifier accepted an ill-typed function (wanted '${needle}')`); +} + +test("lowtier: printer shows typed defs; untyped stay bare", () => { + const printed = printFunction(buildLowTierAdd("probe")); + assertContains(printed, ': i1 = has_tag'); + assertContains(printed, 'tag="number"'); + assertContains(printed, ": f64 = unbox_f64"); + assertContains(printed, ": f64 = f64_add"); + assertNotContains(printed, ": any ="); // "any" defs print bare + // box_f64 produces a boxed value again: no type annotation + const boxline = printed.split("\n").filter((l) => l.indexOf("box_f64") !== -1 && l.indexOf("unbox") === -1)[0]!; + assert(boxline.indexOf(": f64") === -1 && boxline.indexOf(": i1") === -1, "box_f64 def must be untyped"); +}); + +test("lowtier: the parameterized diamond covers sub/mul/div", () => { + for (const [f64op, generic] of [["f64_sub", "sub"], ["f64_mul", "mul"], ["f64_div", "div"]] as const) { + const fn = buildArithDiamond("probe_" + generic, f64op, generic); + verifyFunction(fn); + const printed = printFunction(fn); + assertContains(printed, ": f64 = " + f64op); + assertContains(printed, generic + " "); + } +}); + +test("lowtier: f64_lt prints as i1 and feeds cond_br", () => { + const printed = printFunction(buildLowTierLt("probe")); + assertContains(printed, ": i1 = f64_lt"); + assertContains(printed, ": f64 = unbox_f64"); +}); + +test("lowtier: verifier accepts the guarded diamonds", () => { + verifyFunction(buildLowTierAdd("ok_add")); // builders verify internally too + verifyFunction(buildLowTierLt("ok_lt")); +}); + +test("lowtier: verifier rejects f64 flowing into a generic op", () => { + const fb = new FunctionBuilder("bad", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + fb.ret(fb.emit("add", [ua, a], {})); + assertVerifyFails(fb.finish(), "may not be f64"); +}); + +test("lowtier: verifier rejects a boxed value in an f64 operand slot", () => { + const fb = new FunctionBuilder("bad", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const sum = fb.emit("f64_add", [a, a], {}); + fb.ret(fb.emit("box_f64", [sum], {})); + assertVerifyFails(fb.finish(), "wants f64, got any"); +}); + +test("lowtier: verifier rejects i1 where a boxed value is expected", () => { + const fb = new FunctionBuilder("bad", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const t = fb.emit("has_tag", [a], { tag: "number" }); + fb.ret(t); + assertVerifyFails(fb.finish(), "may not be i1"); +}); + +test("lowtier: verifier rejects an i1 operand to an f64-typed op", () => { + const fb = new FunctionBuilder("bad", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const t = fb.emit("has_tag", [a], { tag: "number" }); + fb.ret(fb.emit("box_f64", [t], {})); + assertVerifyFails(fb.finish(), "wants f64, got i1"); +}); + +test("lowtier: verifier rejects raw f64/i1 block arguments", () => { + const fb = new FunctionBuilder("bad", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + const join = fb.newBlock("join"); + const jp = join.addParam("jp"); + fb.br(join, [ua]); + fb.sealBlock(join); + fb.setInsertPoint(join); + fb.ret(jp); + assertVerifyFails(fb.finish(), "block arguments must be boxed"); +}); + +test("lowtier: cond_br accepts i1 and legacy any conditions, rejects f64", () => { + const fb = new FunctionBuilder("bad", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + const t = fb.newBlock("t"); + const f = fb.newBlock("f"); + fb.condBr(ua, t, [], f, []); + fb.sealBlock(t); + fb.sealBlock(f); + fb.setInsertPoint(t); + fb.ret(fb.constUndefined()); + fb.setInsertPoint(f); + fb.ret(fb.constUndefined()); + assertVerifyFails(fb.finish(), "cond_br condition may not be f64"); +}); + +test("lowtier: DCE removes dead pure low-tier chains", () => { + const fb = new FunctionBuilder("deadchain", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + const s = fb.emit("f64_add", [ua, ua], {}); + fb.emit("box_f64", [s], {}); // dead: result unused (GC effect is removable) + fb.ret(a); + const fn = fb.finish(); + verifyFunction(fn); + const module = new Module("m"); + module.functions.push(fn); + optimizeFunction(fn, module); + verifyFunction(fn); + const printed = printFunction(fn); + assertNotContains(printed, "f64_add"); + assertNotContains(printed, "box_f64"); + assertNotContains(printed, "unbox_f64"); +}); + // --- oracle: TypeSig -> EirType mapping ----------------------------------------- test("oracle: TypeSig constituents map to EirType tags", () => { diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index f727a7b5..7721282d 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -192,6 +192,47 @@ export function verifyFunction(fn: Func): boolean { }); } + // typed-flow rules (the low tier). f64/i1 values are raw machine values: + // - an op with a sig gets exactly what the sig says per slot ("f64" + // slots take only f64 values; "ejsval" slots take any boxed value, + // which excludes f64/i1); + // - an op without a sig takes only boxed values — with one exception: + // cond_br's condition may additionally be i1 (has_tag / f64_lt; the + // legacy "any"-typed condition sources to_boolean / prop_iter_next + // already emit their own machine i1); + // - branch-edge arguments must be boxed: block params are EjsValue + // phis in the emitter, so f64/i1 may NOT cross block boundaries. + // (Phase 3's guarded diamonds carry values across joins boxed.) + const isRaw = (t: string) => t === "f64" || t === "i1"; + for (const b of fn.blocks) { + if (!reachable.has(b)) continue; + for (const inst of b.insts) { + const info = opInfo(inst.op); + inst.operands.forEach((o, idx) => { + const want = info.sig ? info.sig.params[idx] : undefined; + if (want === "f64") { + if (o.type !== "f64") + fail(`'${inst.op}' operand ${idx} wants f64, got ${o.type}`, inst); + } else if (want === "ejsval") { + if (isRaw(o.type)) + fail(`'${inst.op}' operand ${idx} wants a boxed value, got ${o.type}`, inst); + } else if (inst.op === "cond_br" && idx === 0) { + if (o.type === "f64") fail("cond_br condition may not be f64", inst); + } else if (isRaw(o.type)) { + fail(`'${inst.op}' operand ${idx} may not be ${o.type}`, inst); + } + }); + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) + if (a && isRaw(a.type)) + fail( + `edge to ^${t.block.name} passes a raw ${a.type} value; block arguments must be boxed`, + inst + ); + } + } + return true; } diff --git a/lib/llvm.d.ts b/lib/llvm.d.ts index 8eaca4d5..87fb2065 100644 --- a/lib/llvm.d.ts +++ b/lib/llvm.d.ts @@ -206,6 +206,11 @@ declare module "@llvm" { ): Value; createGlobalStringPtr(value: string, name: string): Constant; createICmpEq(l: Value, r: Value, name: string): Value; + createFAdd(l: Value, r: Value, name: string): Value; + createFSub(l: Value, r: Value, name: string): Value; + createFMul(l: Value, r: Value, name: string): Value; + createFDiv(l: Value, r: Value, name: string): Value; + createFCmpOLT(l: Value, r: Value, name: string): Value; createICmpSGt(l: Value, r: Value, name: string): Value; createICmpUGt(l: Value, r: Value, name: string): Value; createICmpULt(l: Value, r: Value, name: string): Value; diff --git a/node-llvm/irbuilder.cpp b/node-llvm/irbuilder.cpp index bf7fbfc2..32c04f60 100644 --- a/node-llvm/irbuilder.cpp +++ b/node-llvm/irbuilder.cpp @@ -42,6 +42,10 @@ namespace jsllvm { Nan::SetMethod(ctor_func, "createCall", IRBuilder::CreateCall); Nan::SetMethod(ctor_func, "createInvoke", IRBuilder::CreateInvoke); Nan::SetMethod(ctor_func, "createFAdd", IRBuilder::CreateFAdd); + Nan::SetMethod(ctor_func, "createFSub", IRBuilder::CreateFSub); + Nan::SetMethod(ctor_func, "createFMul", IRBuilder::CreateFMul); + Nan::SetMethod(ctor_func, "createFDiv", IRBuilder::CreateFDiv); + Nan::SetMethod(ctor_func, "createFCmpOLT", IRBuilder::CreateFCmpOLT); Nan::SetMethod(ctor_func, "createAlloca", IRBuilder::CreateAlloca); Nan::SetMethod(ctor_func, "createLoad", IRBuilder::CreateLoad); Nan::SetMethod(ctor_func, "createStore", IRBuilder::CreateStore); @@ -319,6 +323,58 @@ namespace jsllvm { info.GetReturnValue().Set(result); } + NAN_METHOD(IRBuilder::CreateFSub) { + v8::Isolate *isolate = info.GetIsolate(); + v8::Local context = isolate->GetCurrentContext(); + Nan::HandleScope scope; + + REQ_LLVM_VAL_ARG(context, 0, left); + REQ_LLVM_VAL_ARG(context, 1, right); + FALLBACK_EMPTY_UTF8_ARG(context, 2, name); + + Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateFSub(left, right, *name))); + info.GetReturnValue().Set(result); + } + + NAN_METHOD(IRBuilder::CreateFMul) { + v8::Isolate *isolate = info.GetIsolate(); + v8::Local context = isolate->GetCurrentContext(); + Nan::HandleScope scope; + + REQ_LLVM_VAL_ARG(context, 0, left); + REQ_LLVM_VAL_ARG(context, 1, right); + FALLBACK_EMPTY_UTF8_ARG(context, 2, name); + + Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateFMul(left, right, *name))); + info.GetReturnValue().Set(result); + } + + NAN_METHOD(IRBuilder::CreateFDiv) { + v8::Isolate *isolate = info.GetIsolate(); + v8::Local context = isolate->GetCurrentContext(); + Nan::HandleScope scope; + + REQ_LLVM_VAL_ARG(context, 0, left); + REQ_LLVM_VAL_ARG(context, 1, right); + FALLBACK_EMPTY_UTF8_ARG(context, 2, name); + + Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateFDiv(left, right, *name))); + info.GetReturnValue().Set(result); + } + + NAN_METHOD(IRBuilder::CreateFCmpOLT) { + v8::Isolate *isolate = info.GetIsolate(); + v8::Local context = isolate->GetCurrentContext(); + Nan::HandleScope scope; + + REQ_LLVM_VAL_ARG(context, 0, left); + REQ_LLVM_VAL_ARG(context, 1, right); + FALLBACK_EMPTY_UTF8_ARG(context, 2, name); + + Local result = Instruction::Create(static_cast(IRBuilder::builder.CreateFCmpOLT(left, right, *name))); + info.GetReturnValue().Set(result); + } + NAN_METHOD(IRBuilder::CreateAlloca) { v8::Isolate *isolate = info.GetIsolate(); v8::Local context = isolate->GetCurrentContext(); diff --git a/node-llvm/irbuilder.h b/node-llvm/irbuilder.h index 1ed8b3a4..91833100 100644 --- a/node-llvm/irbuilder.h +++ b/node-llvm/irbuilder.h @@ -25,6 +25,10 @@ namespace jsllvm { static NAN_METHOD(CreateCall); static NAN_METHOD(CreateInvoke); static NAN_METHOD(CreateFAdd); + static NAN_METHOD(CreateFSub); + static NAN_METHOD(CreateFMul); + static NAN_METHOD(CreateFDiv); + static NAN_METHOD(CreateFCmpOLT); static NAN_METHOD(CreateAlloca); static NAN_METHOD(CreateLoad); static NAN_METHOD(CreateStore); diff --git a/test/eir-lowtier1.js b/test/eir-lowtier1.js new file mode 100644 index 00000000..0398a89b --- /dev/null +++ b/test/eir-lowtier1.js @@ -0,0 +1,36 @@ +// Phase 2 low-tier probe. With EJS_EIR_LOWTIER=1 in the compiler's +// environment these function bodies are swapped for hand-built EIR +// (has_tag guard -> unbox/f64 op/box fast path vs the generic slow path; +// see lib/eir/lowtier-probe.ts). Without it they compile normally. +// Observable output must be identical either way. + +function lowtier_add(a, b) { return a + b; } +function lowtier_sub(a, b) { return a - b; } +function lowtier_mul(a, b) { return a * b; } +function lowtier_div(a, b) { return a / b; } +function lowtier_lt(a, b) { return a < b; } + +console.log(lowtier_add(2, 3)); // fast: 5 +console.log(lowtier_add(0.5, 0.25)); // fast: 0.75 +console.log(lowtier_add(NaN, 1)); // fast (NaN IS a number): NaN +console.log(lowtier_add(-0, 0)); // fast: 0 +console.log(lowtier_add(2147483647, 1)); // fast: 2147483648 +console.log(lowtier_add("a", "b")); // slow: ab +console.log(lowtier_add(2, "x")); // slow (mixed): 2x +console.log(lowtier_sub(5, 2)); // fast: 3 +console.log(lowtier_sub(0.75, 0.5)); // fast: 0.25 +console.log(lowtier_sub("5", 2)); // slow (string): 3 +console.log(lowtier_mul(3, 4)); // fast: 12 +console.log(lowtier_mul(-0.5, 4)); // fast: -2 +console.log(lowtier_mul("3", 4)); // slow (string): 12 +console.log(lowtier_div(1, 0)); // fast: Infinity (only a real fdiv does this) +console.log(lowtier_div(0, 0)); // fast: NaN +console.log(lowtier_div(7, 2)); // fast: 3.5 +// (no slow-path div row: the runtime's generic _ejs_op_div aborts on +// non-number operands — ejs-ops.c:901, pre-existing gap. Slow routing is +// the same parameterized diamond code path add/sub/mul exercise above.) +console.log(lowtier_lt(1, 2)); // fast: true +console.log(lowtier_lt(2, 1)); // fast: false +console.log(lowtier_lt(NaN, 1)); // fast: false +console.log(lowtier_lt(1, NaN)); // fast: false +console.log(lowtier_lt("a", "b")); // slow: true diff --git a/test/expected/eir-lowtier1.js.expected-out b/test/expected/eir-lowtier1.js.expected-out new file mode 100644 index 00000000..a096e3f2 --- /dev/null +++ b/test/expected/eir-lowtier1.js.expected-out @@ -0,0 +1,21 @@ +5 +0.75 +NaN +0 +2147483648 +ab +2x +3 +0.25 +3 +12 +-2 +12 +Infinity +NaN +3.5 +true +false +false +false +true From 568efc794e09be24e3fdb60606b8b910ccaf80fb Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 02:13:40 -0700 Subject: [PATCH 087/146] eir: Phase 3 lowering -- oracle-guided guarded arithmetic diamonds LowerFunction.binary() consults the TypeOracle for + - * / <: when both operand types are exactly {number} (top, mixed, and reassignment-widened unions like number|undefined all decline), it emits the guarded diamond in logical()'s block idiom -- has_tag(l) -> nested has_tag(r) -> fast block unbox_f64/unbox_f64/f64_op/box_f64 -> join blockparam; slow block keeps the generic op. Raw values never cross blocks (P2 rule): `<` feeds its f64_lt i1 into a nested cond_br whose join edges carry const booleans. Operands are lowered exactly once, before the split. Numeric literals (and unary +/- over them) type {number} directly -- the oracle's mapping policy leaves them unmapped -- but only when an oracle is present: null oracle (flag off, degraded, self-hosted) does zero oracle work and emits zero diamonds; flag-off executables proven byte-identical pre-vs-post chunk (whole-tree stash bisect, verified independently in review). Threading rides ModCtx (oracle + typed_stats) from compile()'s per-module probe through collectEIRToplevel -- no per-function signature churn. Telemetry: `-d` reports N typed diamond(s); the --types stats line gains diamonds=N oracleQueries=Q oracleUnknown=U (the oracleUnknown counter doubles as the node-identity canary the plan asked for -- normalizeDefaultExports splices a few nodes post-probe, documented at the call site). Correctness is guard-borne, not oracle-borne, and the review proved it end-to-end: with a module-local analysis wrongly typing a param {number}, a cross-module call passing {valueOf(){throw}} takes the slow path inside a try, the generic op's invoke-style unwind targets fire (builder attaches them to THROW-effect ops under any active handler -- no diamond-specific code), and the handler catches. Fast/slow semantic equivalence verified against ejs-ops.c for all five ops: plain C double arithmetic, no int fast paths, lt is ordered-< with NaN->false = FCmpOLT. 8 EIR-shape unit tests in lib/eir/tests.ts via a stub oracle (buck sandbox has no maam): diamond shape per op incl. the boolean join, null-oracle/string/mixed/widened all decline, literal rule, verifier green on everything. tsc, //:test-eir, //:test-eir-lowtier, full matrix green. Tooling note for the record: expected-file regeneration is mtime-based (buck-test-stage.sh touches to suppress); exactly two tests (esprima-roundtrip1/2) regenerate standing with no committed expected file -- keep test-lane daemons color-free (FORCE_COLOR poisons regenerated baselines invisibly). Chunk J (full-suite --types diff lane, test/types/ probes, microbenchmark) completes the Phase 3 gates. Co-Authored-By: Claude Fable 5 --- lib/compiler.ts | 19 ++++++- lib/eir/integrate.ts | 24 +++++++-- lib/eir/lower.ts | 115 +++++++++++++++++++++++++++++++++++++++++-- lib/eir/oracle.ts | 25 +++++++++- lib/eir/tests.ts | 115 +++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 286 insertions(+), 12 deletions(-) diff --git a/lib/compiler.ts b/lib/compiler.ts index c91b511d..be76f047 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -712,13 +712,28 @@ export function compile( // then empties) the toplevel body. Logs stats (and, for --types-dump, // per-binding types); the returned TypeOracle is not consumed by // codegen yet (Phase 3); never fails the compile. + let type_oracle = null; if (options.types || options.types_dump) - runTypeAnalysisProbe(tree, source_filename, options.types_dump); + type_oracle = runTypeAnalysisProbe(tree, source_filename, options.types_dump); // EIR is the only pipeline: a module that can't lower is a compile // error, not a fallback - let lowered = collectEIRToplevel(tree, source_filename, module_infos, this_module_info, options); + let lowered = collectEIRToplevel( + tree, + source_filename, + module_infos, + this_module_info, + options, + type_oracle + ); if (lowered.error) throw new Error(`${source_filename}: ${lowered.error}`); + // Phase 3 telemetry: how many guarded diamonds lowering emitted, and + // whether any oracle query missed (the node-identity canary) + if (type_oracle) + console.warn( + `--types: ${source_filename}: diamonds=${lowered.diamonds ?? 0} ` + + `oracleQueries=${type_oracle.stats.queries} oracleUnknown=${type_oracle.stats.unknown}` + ); const toplevel_node = tree.body[0] as e.FunctionDeclaration; const toplevel_name = toplevel_node.id.name; diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 11831c8a..0ad974b0 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -23,6 +23,7 @@ import * as b from "../ast-builder"; import * as debug from "../debug"; import { ScopeAnalysis } from "./scopes"; import { lowerAnalyzedFunction } from "./lower"; +import type { TypeOracle } from "./oracle"; import type { ModuleRef, ModCtx } from "./lower"; import { isLowerNotSupported } from "./errors"; import { Module } from "./ir"; @@ -44,8 +45,8 @@ export interface ModuleAccessor { } export type CollectResult = - | { eir_module: Module; accessors: ModuleAccessor[]; error?: undefined } - | { error: string; eir_module?: undefined; accessors?: undefined }; + | { eir_module: Module; accessors: ModuleAccessor[]; diamonds: number; error?: undefined } + | { error: string; eir_module?: undefined; accessors?: undefined; diamonds?: undefined }; // --dump-after eir: print the lowered (verified) EIR module function dumpRequested(options: CompilerOptions | undefined): boolean { @@ -364,7 +365,13 @@ export function collectEIRToplevel( filename: string, module_infos: Map | null, this_module_info: ModuleInfo, - options: CompilerOptions + options: CompilerOptions, + // Phase 3: the module's type oracle (null = no typed fast paths). + // NB: normalizeDefaultExports below splices/retypes a few toplevel + // statements AFTER the probe analyzed the tree — surviving nodes keep + // their identity; nodes minted here read as oracle-unknown (-> top, + // no diamond), visible in the probe's oracleUnknown counter. + oracle: TypeOracle | null = null ): CollectResult { const toplevel = tree.body[0] as e.FunctionDeclaration; const body = toplevel.body.body; @@ -385,10 +392,13 @@ export function collectEIRToplevel( // the toplevel environment, which a direct caller's envParam // wouldn't carry. direct calls stay a devirtualization // opportunity for the optimizer, which can prove capture shapes. + let typed_stats = { diamonds: 0 }; let mod_ctx = { refs: refs, this_module_info: this_module_info, module_infos: module_infos, + oracle: oracle, + typed_stats: typed_stats, }; let eir_module = new Module(filename); @@ -434,8 +444,12 @@ export function collectEIRToplevel( toplevel.eir_module = eir_module; toplevel.eir_main = info.name; toplevel.body = { type: "BlockStatement", body: [], loc: toplevel.loc }; - debug.log(1, `EIR: ${filename}: whole module lowered (toplevel-as-EIR)`); - return { eir_module: eir_module, accessors: accessors }; + debug.log( + 1, + `EIR: ${filename}: whole module lowered (toplevel-as-EIR)` + + (typed_stats.diamonds > 0 ? `, ${typed_stats.diamonds} typed diamond(s)` : "") + ); + return { eir_module: eir_module, accessors: accessors, diamonds: typed_stats.diamonds }; } catch (e) { if (!isLowerNotSupported(e)) throw e; // there is no legacy pipeline to fall back to anymore: surface diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index 61f9b528..8aa9457f 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -21,6 +21,7 @@ import { LowerNotSupported } from "./errors"; import { eir_intrinsics } from "./intrinsics"; import type * as e from "../estree"; import type { ModuleInfo } from "../module-info"; +import type { TypeOracle } from "./oracle"; // --- module-scope interop types (integrate.ts imports these) ----------------- @@ -51,6 +52,11 @@ export interface ModCtx { refs: Map; this_module_info?: ModuleInfo | null; module_infos?: Map | null; + // Phase 3: the per-module type oracle (null/absent = no typed fast + // paths, today's lowering exactly) and the module-wide stats the + // lowered functions accumulate into + oracle?: TypeOracle | null; + typed_stats?: { diamonds: number }; } // an environment-descriptor chain node: a per-iteration loop env or a @@ -72,6 +78,15 @@ interface FinallyCtx { handlerDepth: number; } +// the Phase 3 typed fast path: source operator -> low-tier f64 op +const f64ops: Record = { + "+": "f64_add", + "-": "f64_sub", + "*": "f64_mul", + "/": "f64_div", + "<": "f64_lt", +}; + const binops: Record = { "+": "add", "-": "sub", @@ -141,6 +156,8 @@ class LowerFunction { // crossed finalizer at the exit site (finalizer duplication). finallyCtx: FinallyCtx[] = []; curEnv: Inst; + // Phase 3: the module's type oracle (null = no typed fast paths) + oracle: TypeOracle | null; constructor(info: FnInfo, analysis: ScopeAnalysis, module: Module, mod_ctx?: ModCtx) { this.info = info; @@ -148,6 +165,7 @@ class LowerFunction { this.module = module; this.isToplevel = !!info.isToplevel; this.mod_ctx = mod_ctx || { refs: new Map() }; + this.oracle = this.mod_ctx.oracle ?? null; const paramNames = info.params.map((p) => p.uid); this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); @@ -644,9 +662,91 @@ class LowerFunction { if (!op) throw LowerNotSupported(`binary operator ${n.operator}`, n.loc); let l = this.expr(n.left); let r = this.expr(n.right); + // Phase 3: born-typed guarded arithmetic. When the oracle types + // BOTH operands as exactly {number}, split the same diamond shape + // logical() uses: has_tag guards -> fast unbox/f64 op/box vs the + // generic slow op, rejoining in a boxed block param. Guarded + // consumption is correct even when the oracle is wrong — the + // has_tag guards decide at runtime; only code size/speed change. + const f64op = f64ops[n.operator]; + if (f64op && this.operandIsNumber(n.left) && this.operandIsNumber(n.right)) + return this.numericDiamond(f64op, op, l, r); return this.b.emit(op, [l, r], {}); } + // Does this operand node type as exactly {number}? Numeric literals + // qualify directly: the oracle's mapping policy leaves literals + // unmapped (glue), so `x + 1` would otherwise never take the fast + // path. (A unary +/- on a numeric literal is the parsed form of a + // signed literal — pre-EIR desugar does not fold it.) Everything + // else asks the oracle, and only a pure {number} answer qualifies — + // not top, and not reassignment-widened unions like number|undefined. + operandIsNumber(node: e.Expression): boolean { + if (!this.oracle) return false; // no oracle, no diamonds — today's lowering + if (node.type === "Literal") return typeof node.value === "number"; + if ( + node.type === "UnaryExpression" && + (node.operator === "-" || node.operator === "+") && + node.argument.type === "Literal" && + typeof (node.argument as e.Literal).value === "number" + ) + return true; + const t = this.oracle.typeOfNode(node); + return t.tags !== "top" && t.tags.size === 1 && t.tags.has("number"); + } + + // has_tag(l) -> has_tag(r) -> fast: unbox both, f64 op, rejoin boxed; + // any guard failure -> slow: the generic op. The join param is an + // ejsval: raw f64/i1 never crosses a block boundary (P2 verifier + // rule), so f64 results re-box in the fast block and f64_lt's i1 + // branches to boolean-constant edges into the join. + numericDiamond(f64op: string, genericOp: string, l: Inst, r: Inst): Inst { + if (this.mod_ctx.typed_stats) this.mod_ctx.typed_stats.diamonds++; + + const guard2_bb = this.b.newBlock("num_guard2"); + const fast_bb = this.b.newBlock("num_fast"); + const slow_bb = this.b.newBlock("num_slow"); + const join_bb = this.b.newBlock("num_join"); + const result = join_bb.addParam("num"); + + const t1 = this.b.emit("has_tag", [l], { tag: "number" }); + this.b.condBr(t1, guard2_bb, [], slow_bb, []); + this.b.sealBlock(guard2_bb); + + this.b.setInsertPoint(guard2_bb); + const t2 = this.b.emit("has_tag", [r], { tag: "number" }); + this.b.condBr(t2, fast_bb, [], slow_bb, []); + this.b.sealBlock(fast_bb); + this.b.sealBlock(slow_bb); + + this.b.setInsertPoint(fast_bb); + const ua = this.b.emit("unbox_f64", [l], {}); + const ub = this.b.emit("unbox_f64", [r], {}); + const v = this.b.emit(f64op, [ua, ub], {}); + if (f64op === "f64_lt") { + const t_bb = this.b.newBlock("num_lt_true"); + const f_bb = this.b.newBlock("num_lt_false"); + this.b.condBr(v, t_bb, [], f_bb, []); + this.b.sealBlock(t_bb); + this.b.sealBlock(f_bb); + this.b.setInsertPoint(t_bb); + this.b.br(join_bb, [this.b.constBool(true)]); + this.b.setInsertPoint(f_bb); + this.b.br(join_bb, [this.b.constBool(false)]); + } else { + const boxed = this.b.emit("box_f64", [v], {}); + this.b.br(join_bb, [boxed]); + } + + this.b.setInsertPoint(slow_bb); + const g = this.b.emit(genericOp, [l, r], {}); + this.b.br(join_bb, [g]); + this.b.sealBlock(join_bb); + + this.b.setInsertPoint(join_bb); + return result; + } + logical(n: e.LogicalExpression): Inst { let l = this.expr(n.left); let lbool = this.b.emit("to_boolean", [l], {}); @@ -1725,12 +1825,21 @@ function lowerOneFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, // lower a FunctionDeclaration/FunctionExpression AST node into a fresh // module; returns { module, fn } -export function lowerFunctionNode(n: e.Function, name?: string): { module: Module; fn: Func } { +export function lowerFunctionNode( + n: e.Function, + name?: string, + oracle?: TypeOracle | null +): { module: Module; fn: Func; diamonds: number } { let analysis = new ScopeAnalysis(); let info = analysis.analyzeFunction(n, name); let module = new Module(info.name); - let fn = lowerOneFunction(info, analysis, module); - return { module: module, fn: fn }; + let typed_stats = { diamonds: 0 }; + let fn = lowerOneFunction(info, analysis, module, { + refs: new Map(), + oracle: oracle ?? null, + typed_stats, + }); + return { module: module, fn: fn, diamonds: typed_stats.diamonds }; } // lower every top-level function declaration in a parsed program diff --git a/lib/eir/oracle.ts b/lib/eir/oracle.ts index b4180f4d..dbf5f1be 100644 --- a/lib/eir/oracle.ts +++ b/lib/eir/oracle.ts @@ -139,6 +139,20 @@ export interface TypeOracle { describe(): string; // stats line for --types logging } +// what the probe actually returns: the oracle plus query telemetry. The +// `unknown` counter is the node-identity canary — a query for a node maam +// never saw (dead code, unmapped glue, or a node MINTED AFTER the probe, +// e.g. by normalizeDefaultExports' splicing) reads as "top"; if identity +// ever silently breaks at scale, this number says so. +export interface ProbeOracleStats { + queries: number; + unknown: number; +} + +export interface ProbeOracle extends TypeOracle { + readonly stats: ProbeOracleStats; +} + const TAG_BY_SIG: Record = { num: "number", str: "string", @@ -297,7 +311,7 @@ export function runTypeAnalysisProbe( tree: e.Program, source_filename: string, dump = false -): TypeOracle | null { +): ProbeOracle | null { const maam = loadMaam(source_filename); if (!maam) return null; @@ -331,8 +345,15 @@ export function runTypeAnalysisProbe( console.warn(result.describe()); if (dump) dumpBindingTypes(result, program as { body: e.Statement[] }, source_filename); + const stats: ProbeOracleStats = { queries: 0, unknown: 0 }; return { - typeOfNode: (n) => typeSigToEirType(result.typeOfNode(n)), + stats, + typeOfNode: (n) => { + stats.queries++; + const sig = result.typeOfNode(n); + if (sig === undefined) stats.unknown++; + return typeSigToEirType(sig); + }, // The plan text gates closedWorld() on unknownCalls alone because it // predates the degradedBindings counter (unmodeled imports, rest // params — Chunks A/D). Both must be zero: either one means some diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 9a12ce53..2eb1cbde 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -16,6 +16,7 @@ import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; import { typeSigToEirType } from "./oracle"; +import type { TypeOracle, TypeTag } from "./oracle"; import { buildArithDiamond, buildLowTierAdd, buildLowTierLt } from "./lowtier-probe"; import { DesugarClasses } from "../passes/desugar-classes"; import { DesugarDestructuring } from "../passes/desugar-destructuring"; @@ -1146,6 +1147,120 @@ test("lowtier: DCE removes dead pure low-tier chains", () => { assertNotContains(printed, "unbox_f64"); }); +// --- Phase 3: oracle-guided guarded arithmetic ------------------------------------ + +// a hand-built TypeOracle: types Identifier nodes by name, everything else +// (and unknown names) is top. The TypeOracle interface from Chunk G is +// all lowering may consume, so this is a faithful stand-in for maam. +function stubOracle(types: Record): TypeOracle { + return { + typeOfNode: (n) => { + const id = n as { type?: string; name?: string }; + const tags = id.type === "Identifier" && id.name !== undefined ? types[id.name] : undefined; + return tags ? { tags: new Set(tags) } : { tags: "top" }; + }, + closedWorld: () => false, + describe: () => "stub", + }; +} + +function lowerWithOracle(src: string, oracle: TypeOracle | null) { + let r = lowerFunctionNode(parseFn(src), undefined, oracle); + verifyModule(r.module); // (g) every lowered output must verify + return { printed: printFunction(r.fn), diamonds: r.diamonds }; +} + +const DIAMOND_MARKS = ["has_tag", "unbox_f64", "box_f64", "num_join"]; + +test("typed-arith: {number}x{number} + emits the guarded diamond", () => { + const { printed, diamonds } = lowerWithOracle( + "function f(x, y) { return x + y; }", + stubOracle({ x: ["number"], y: ["number"] }) + ); + assert(diamonds === 1, `diamonds=${diamonds}`); + for (const m of DIAMOND_MARKS) assertContains(printed, m); + assertContains(printed, 'tag="number"'); + assertContains(printed, ": f64 = f64_add"); + assertContains(printed, ": f64 = unbox_f64"); + assertContains(printed, ": i1 = has_tag"); +}); + +test("typed-arith: null oracle lowers exactly as before (no diamond)", () => { + const { printed, diamonds } = lowerWithOracle("function f(x, y) { return x + y; }", null); + assert(diamonds === 0, `diamonds=${diamonds}`); + for (const m of DIAMOND_MARKS) assertNotContains(printed, m); + assertContains(printed, "add "); +}); + +test("typed-arith: string operands take no diamond", () => { + const { printed, diamonds } = lowerWithOracle( + "function f(x, y) { return x + y; }", + stubOracle({ x: ["string"], y: ["string"] }) + ); + assert(diamonds === 0, `diamonds=${diamonds}`); + assertNotContains(printed, "has_tag"); +}); + +test("typed-arith: mixed, top, and widened number|undefined take no diamond", () => { + for (const types of [ + { x: ["number"] as TypeTag[], y: ["string"] as TypeTag[] }, // mixed + { x: ["number"] as TypeTag[], y: undefined }, // top + { x: ["number", "undefined"] as TypeTag[], y: ["number"] as TypeTag[] }, // widened + ]) { + const { printed, diamonds } = lowerWithOracle( + "function f(x, y) { return x + y; }", + stubOracle(types) + ); + assert(diamonds === 0, `diamonds=${diamonds} for ${JSON.stringify(types)}`); + assertNotContains(printed, "has_tag"); + } +}); + +test("typed-arith: numeric literals type directly — `x + 1` diamonds", () => { + const { printed, diamonds } = lowerWithOracle( + "function f(x) { return x + 1; }", + stubOracle({ x: ["number"] }) + ); + assert(diamonds === 1, `diamonds=${diamonds}`); + assertContains(printed, ": f64 = f64_add"); + // and a negated literal too (parsed as unary minus over a literal) + const neg = lowerWithOracle("function f(x) { return x - -2; }", stubOracle({ x: ["number"] })); + assert(neg.diamonds === 1, `diamonds=${neg.diamonds}`); + assertContains(neg.printed, ": f64 = f64_sub"); +}); + +test("typed-arith: literals alone do not diamond without an oracle", () => { + const { printed, diamonds } = lowerWithOracle("function f() { return 1 + 2; }", null); + assert(diamonds === 0, `diamonds=${diamonds}`); + assertNotContains(printed, "has_tag"); +}); + +test("typed-arith: `<` diamonds through boolean-constant join edges", () => { + const { printed, diamonds } = lowerWithOracle( + "function f(x, y) { return x < y; }", + stubOracle({ x: ["number"], y: ["number"] }) + ); + assert(diamonds === 1, `diamonds=${diamonds}`); + assertContains(printed, ": i1 = f64_lt"); + assertContains(printed, "num_lt_true"); + assertContains(printed, "num_lt_false"); + // the i1 never reaches the join: its edges carry boolean constants + assertContains(printed, 'kind="boolean", value=true'); + assertContains(printed, 'kind="boolean", value=false'); + assertNotContains(printed, "= box_f64"); // no f64 result to box for `<` (unbox_f64 remains) +}); + +test("typed-arith: mul/div diamonds carry their ops", () => { + for (const [src, op] of [ + ["function f(x, y) { return x * y; }", "f64_mul"], + ["function f(x, y) { return x / y; }", "f64_div"], + ] as const) { + const { printed, diamonds } = lowerWithOracle(src, stubOracle({ x: ["number"], y: ["number"] })); + assert(diamonds === 1, `diamonds=${diamonds}`); + assertContains(printed, ": f64 = " + op); + } +}); + // --- oracle: TypeSig -> EirType mapping ----------------------------------------- test("oracle: TypeSig constituents map to EirType tags", () => { From 5093e1d1fa7dc485da81425032cafa005e1d6a9b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 09:53:10 -0700 Subject: [PATCH 088/146] eir: Phase 3 gates -- the --types diff lane, test/types probes, benchmark The behavioral gate for oracle-guided lowering, closing Phase 3: buck-test-types-diff.sh compiles every test/*.js flag-off and --types in a caller-supplied buck work tree and diffs run stdout byte-for-byte (stderr excluded by design -- stats lines live there, and the debug runtime traces exceptions to stderr during normal control flow). Result: 458 files, 457 identical, 0 divergent, 1 N/A (tester.js, flag-off-identical parse failure); 67 diamonds suite-wide, oracleQueries=1319, oracleUnknown=1035 (operands in module-locally unreached functions -- guard-shaped degradation as designed). Independently reproduced in review at 514/514 identical on a superset corpus. The lane fails on any divergence, any anomaly status (timeout/spawn/types-only compile failure), zero files compared, or zero diamonds total -- the last two close real vacuous-pass modes found in review (relative path -> all-N/A "PASS"; non-repo-resident tree -> silent oracle skip). Paths are absolutized up front. test/types/: modernization-style probe dir (README + 7 probes + lib) documenting what fires and what declines: locals 6 / params 4 (incl. 1/0=Infinity through fast fdiv) / literals 5 / loops 6 / widening 0 by design / bench kernel 9 -- and the wrong-oracle keystone: a lib whose param is oracle-typed {number} from its single local call site gets handed "x" cross-module; the guard routes slow, output identical, executables differ exactly as they must (the diamond is in the binary). All probes diff clean against node. Microbenchmark (types-bench1.js, 40x1M iterations of s+i*i-i/2 under <): flag-off median 3.19s vs --types 0.31s -- 10.3x, identical output, 7 interleaved runs each way, tight distributions; reproduced directionally in review. Framed honestly as a best-case ceiling (generic binops dominate the kernel flag-off; suite-wide density is 67 diamonds; unbox/box still round-trips bits_alloca -- headroom). buck-test-stage.sh now forces NO_COLOR=1 / unset FORCE_COLOR around the tester: a color-capable daemon env poisons regenerated expected files invisibly (struck three times; fixed at the source). Full serial matrix green; stage2/stage3 functional gate green (both stages compile+run the whole corpus in identical work dirs). Numbers appended to docs/maam-p0-results.md; P3 ticked in maam-plan.md. Remaining plan items: P3.5 (differential harness, maam repo), P4 (shapes design doc). Co-Authored-By: Claude Fable 5 --- buck-test-stage.sh | 5 + buck-test-types-diff.sh | 144 +++++++++++++++++++++++++++ docs/maam-p0-results.md | 89 +++++++++++++++++ docs/maam-plan.md | 15 ++- test/types/README.md | 36 +++++++ test/types/types-bench1.js | 19 ++++ test/types/types-literals1.js | 8 ++ test/types/types-locals1.js | 9 ++ test/types/types-loops1.js | 10 ++ test/types/types-params1.js | 7 ++ test/types/types-widen1.js | 12 +++ test/types/types-wrongoracle1.js | 8 ++ test/types/types-wrongoracle1/lib.js | 3 + 13 files changed, 364 insertions(+), 1 deletion(-) create mode 100755 buck-test-types-diff.sh create mode 100644 test/types/README.md create mode 100644 test/types/types-bench1.js create mode 100644 test/types/types-literals1.js create mode 100644 test/types/types-locals1.js create mode 100644 test/types/types-loops1.js create mode 100644 test/types/types-params1.js create mode 100644 test/types/types-widen1.js create mode 100644 test/types/types-wrongoracle1.js create mode 100644 test/types/types-wrongoracle1/lib.js diff --git a/buck-test-stage.sh b/buck-test-stage.sh index a0f7e0b8..316e0fad 100644 --- a/buck-test-stage.sh +++ b/buck-test-stage.sh @@ -46,6 +46,11 @@ find "$WORK/test/expected" -type f -exec touch {} + export PATH="$LLVM_BIN:$PATH" export NODE_PATH="$REPO/node_modules:$REPO/node-llvm/build/Release" +# the tester regenerates missing expected-outs by RUNNING node: keep that +# color-free even when the buck daemon inherited a colored dev shell +# (FORCE_COLOR writes ANSI into the expected files and poisons the diffs) +export NO_COLOR=1 +unset FORCE_COLOR if [ -n "$EXTRA_FLAGS" ]; then export EJS_EXTRA_FLAGS="$EXTRA_FLAGS" fi diff --git a/buck-test-types-diff.sh b/buck-test-types-diff.sh new file mode 100755 index 00000000..02efb20e --- /dev/null +++ b/buck-test-types-diff.sh @@ -0,0 +1,144 @@ +#!/bin/bash +# The Phase 3 --types diff lane (docs/maam-plan.md, P3 gate): compile every +# test/*.js twice with the node-hosted compiler — flag-off and --types — run +# both executables, and byte-compare RUN STDOUT. Any divergence is a Phase 3 +# stop-the-line bug: --types may only change code size/speed, never behavior. +# +# Protocol (lessons from the measurement chunks baked in): +# - stdout only: --types adds stats lines to stderr by design, and the +# debug runtime traces normally-handled EXCEPTIONS to stderr; +# - color-free: node inherits FORCE_COLOR from dev shells (and a buck +# daemon started from one) — everything runs under NO_COLOR with +# FORCE_COLOR stripped; +# - files that fail to compile flag-off are N/A (tester.js — an esprima +# parse gap — is the standing one), not lane failures; +# - per-file timeout discipline (120 s, kill and record); +# - the maam CJS dist must be built (external-deps/echojs-maam: +# `npm run build && npm run build:cjs`). +# +# Standalone by design (not genrule-wired: a ~15-minute double compile of +# the whole suite is a CI-lane decision, not a default build step). Run +# from the repo root after `buck2 build //lib:generated //:srcdir-tree`: +# +# ./buck-test-types-diff.sh [concurrency] +# +# where is a stage0-style tree (srcdir-tree + lib/generated + +# test/) — the caller assembles it so this script never mixes trees +# (franken-tree lesson). Writes per-file logs + results.jsonl to +# and prints the summary table. +set -euo pipefail + +# Absolutize both paths up front: a relative once resolved +# against each worker's cwd, turning every compile into an N/A and the +# lane into a 100%-N/A exit-0 "PASS" (review finding M1). The tree must +# also live INSIDE the repo checkout so the probe can find +# external-deps/echojs-maam — from /tmp the oracle silently skips and the +# lane tests nothing Phase-3-specific (guarded below by diamonds==0). +WORK="$(cd "$1" && pwd)" +mkdir -p "$2" +LOGDIR="$(cd "$2" && pwd)" +CONC="${3:-4}" + +export NODE_PATH="/Users/toshok/src/echojs/echojs/node_modules:/Users/toshok/src/echojs/echojs/node-llvm/build/Release" +export PATH="/opt/homebrew/opt/llvm/bin:$PATH" +if [ "$(uname -s)" = "Darwin" ]; then + export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" +fi +export NO_COLOR=1 +unset FORCE_COLOR + +WORK="$WORK" LOGDIR="$LOGDIR" CONC="$CONC" exec node --input-type=module -e ' +import { spawn } from "node:child_process"; +import * as fs from "node:fs"; +import * as path from "node:path"; + +const WORK = process.env.WORK; +const LOGDIR = process.env.LOGDIR; +const CONC = Number(process.env.CONC || 4); +const TIMEOUT_MS = 120000; +const testDir = path.join(WORK, "test"); + +const files = fs.readdirSync(testDir).filter((f) => f.endsWith(".js") && !f.includes("/")).sort(); + +function run(cmd, args, opts, timeoutMs) { + return new Promise((resolve) => { + const child = spawn(cmd, args, { ...opts, stdio: ["ignore", "pipe", "pipe"] }); + let out = Buffer.alloc(0), err = Buffer.alloc(0), timedout = false, failed = null; + child.stdout.on("data", (d) => (out = Buffer.concat([out, d]))); + child.stderr.on("data", (d) => (err = Buffer.concat([err, d]))); + const t = setTimeout(() => { timedout = true; child.kill("SIGKILL"); }, timeoutMs); + // a spawn failure (ENOENT — e.g. an exe that never materialized) + // must be a recorded per-file anomaly, never a lane crash + child.on("error", (e) => { clearTimeout(t); failed = String(e); resolve({ code: -1, out, err, timedout, failed }); }); + child.on("exit", (code) => { clearTimeout(t); resolve({ code, out, err, timedout, failed }); }); + }); +} + +const EJS = ["--srcdir", "--moduledir", "../node-compat", "--moduledir", "../ejs-llvm"]; +const results = []; +let idx = 0; + +async function worker(wid) { + // per-worker TMPDIR: concurrent compiles never share temp space + const tmp = path.join(LOGDIR, "tmp" + wid); + fs.mkdirSync(tmp, { recursive: true }); + const env = { ...process.env, TMPDIR: tmp }; + for (;;) { + const file = files[idx++]; + if (!file) return; + const base = file.replace(/\.js$/, ""); + const exe = path.join(testDir, file + ".exe"); + const r = { file, status: "?", diamonds: 0, queries: 0, unknown: 0 }; + + // flag-off compile + run + const c0 = await run("node", [path.join(WORK, "lib/generated/ejs-es6.js"), ...EJS, file], { cwd: testDir, env }, TIMEOUT_MS); + if (c0.timedout) { r.status = "TIMEOUT-compile-off"; results.push(r); continue; } + if (c0.code !== 0) { r.status = "N/A"; results.push(r); continue; } + const off = await run(exe, [], { cwd: testDir, env }, TIMEOUT_MS); + if (off.failed) { r.status = "RUN-OFF-SPAWN-FAIL"; results.push(r); continue; } + if (off.timedout) { r.status = "TIMEOUT-run-off"; results.push(r); continue; } + + // --types compile + run + const c1 = await run("node", [path.join(WORK, "lib/generated/ejs-es6.js"), ...EJS, "--types", file], { cwd: testDir, env }, TIMEOUT_MS); + if (c1.timedout) { r.status = "TIMEOUT-compile-on"; results.push(r); continue; } + if (c1.code !== 0) { r.status = "TYPES-COMPILE-FAIL"; results.push(r); continue; } + fs.writeFileSync(path.join(LOGDIR, base + ".types.err"), c1.err); + const m = String(c1.err).match(/diamonds=(\d+) oracleQueries=(\d+) oracleUnknown=(\d+)/g) || []; + for (const line of m) { + const g = line.match(/diamonds=(\d+) oracleQueries=(\d+) oracleUnknown=(\d+)/); + r.diamonds += +g[1]; r.queries += +g[2]; r.unknown += +g[3]; + } + const on = await run(exe, [], { cwd: testDir, env }, TIMEOUT_MS); + if (on.failed) { r.status = "RUN-ON-SPAWN-FAIL"; results.push(r); continue; } + if (on.timedout) { r.status = "TIMEOUT-run-on"; results.push(r); continue; } + + if (Buffer.compare(off.out, on.out) === 0 && off.code === on.code) { + r.status = "IDENTICAL"; + } else { + r.status = "DIVERGENT"; + fs.writeFileSync(path.join(LOGDIR, base + ".off.out"), off.out); + fs.writeFileSync(path.join(LOGDIR, base + ".on.out"), on.out); + } + results.push(r); + process.stdout.write(`${file} ${r.status} diamonds=${r.diamonds}\n`); + } +} + +await Promise.all(Array.from({ length: CONC }, (_, i) => worker(i))); + +fs.writeFileSync(path.join(LOGDIR, "results.jsonl"), results.map((r) => JSON.stringify(r)).join("\n") + "\n"); +const by = (s) => results.filter((r) => r.status === s); +const identical = by("IDENTICAL"), divergent = by("DIVERGENT"), na = by("N/A"); +const other = results.filter((r) => !["IDENTICAL", "DIVERGENT", "N/A"].includes(r.status)); +const tot = (k) => results.reduce((a, r) => a + r[k], 0); +console.log("==== --types diff lane summary ===="); +console.log(`files: ${results.length} identical: ${identical.length} divergent: ${divergent.length} N/A: ${na.length} other: ${other.length}`); +console.log(`diamonds total: ${tot("diamonds")} oracleQueries: ${tot("queries")} oracleUnknown: ${tot("unknown")}`); +if (divergent.length) { console.log("DIVERGENT:", divergent.map((r) => r.file).join(" ")); process.exit(1); } +if (other.length) { console.log("OTHER:", other.map((r) => `${r.file}:${r.status}`).join(" ")); process.exit(1); } +// Vacuous-pass guards (review findings M1/M2): a lane that compared zero +// files, or ran with no live oracle (no diamonds anywhere), proves nothing. +if (identical.length === 0) { console.log("LANE FAIL: zero files compared (all N/A) — bad work tree?"); process.exit(1); } +if (tot("diamonds") === 0) { console.log("LANE FAIL: diamonds total is 0 — no live oracle (work tree outside the repo checkout, or maam dist unbuilt); the lane tested nothing Phase-3-specific"); process.exit(1); } +console.log("LANE PASS: zero divergence"); +' diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index 5ef0687d..d8b36396 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -289,3 +289,92 @@ modules across the 3 esprima-importing files; stateCap 0 everywhere. tail** (labels, non-literal defineProperty keys, computed keys, accessors-in-literals) — with only the RestElement gap blocking any module of consequence. + +--- + +# Phase 3 gates (Chunk J) + +Date: 2026-07-22. echojs @ 568efc7 (oracle-guided guarded arithmetic in +lowering), maam @ 8d6a157. Same environment as the earlier measurements +(node v22.4.0, macOS arm64, llvm @ /opt/homebrew/opt/llvm); everything runs +color-free (`NO_COLOR=1`, `FORCE_COLOR` unset — a colored-env buck daemon +poisons regenerated expected files; lesson institutionalized in the lane +script). Raw logs: `~/.cache/maam-p0-logs/J*` (diff-lane per-file logs + +results.jsonl; the microbenchmark timings below are recorded here only — +the timing runs left no separate artifact). + +## The --types diff lane (the behavioral gate) + +`./buck-test-types-diff.sh [conc]` — every test/*.js +compiled flag-off AND with `--types`, both executables run, RUN STDOUT +byte-compared (stderr excluded by design: `--types` stats lines, and the +debug runtime's `EXCEPTIONS:` traces on normally-handled exceptions). +Per-file 120 s timeouts, concurrency 4, per-worker TMPDIRs (concurrent +compiles never share temp space). + +| files | identical | divergent | N/A | timeouts | +|---|---|---|---|---| +| 458 | 457 | **0** | 1 (tester.js, esprima parse gap — fails flag-off too) | 0 | + +Aggregates from the `--types` stats lines: **diamonds 67**, oracleQueries +1319, oracleUnknown 1035. The high unknown share is expected on this +corpus: operands inside functions the per-module analysis never reaches +(exported-only / callback-only bodies, dead branches) query as unknown → +top → no diamond — the guard-shaped degradation working as designed. The +suite is string/object-heavy; 67 diamonds concentrate in the numeric +files. + +## test/types/ probes + +Seven standalone probes (see test/types/README.md for the per-file table): +diamond-eligible shapes fire (locals 6, params 4, literals 5, loops 6, +bench kernel 9); reassignment-widened bindings do NOT diamond (0, by +design — only exact {number} qualifies); and the wrong-oracle case — a +cross-module call handing a string to a parameter the callee's module +analysis typed {number} — routes through the has_tag guard to the slow +path and prints the correct "x1" with flag-off/--types outputs identical. + +## Microbenchmark + +test/types/types-bench1.js: 40 × 1 M-iteration kernel of +`s = s + i*i - i/2; i = i + 1` under a `<` loop guard — all module-local, +everything oracle-typed {number}; diamonds=9, oracleUnknown=0. Compiled +flag-off vs `--types`, run 7× each interleaved (`/usr/bin/time -p`, same +machine, no other load; distributions were tight — no GC-outlier rerun +needed): + +| build | median | min | max | +|---|---|---|---| +| flag-off | 3.19 s | 3.18 s | 3.20 s | +| --types | 0.31 s | 0.31 s | 0.32 s | + +**10.3× median speedup**, identical program output (13333303333341514000). +Honest caveats: this kernel is the best case — per-iteration generic +runtime binop calls dominate the flag-off build, and the typed build +replaces essentially all of them (9 diamonds cover the kernel's every +operator). Real modules keep their surrounding generic ops; the suite-wide +effect is bounded by the 67-diamond density above, and unbox/box round +trips still go through memory (the bits_alloca idiom), so further headroom +remains for a Phase 4-era register-level cleanup. + +## Matrix + stage2 ≡ stage3 (flag off) + +Full serial matrix green: //:test-eir (incl. the typed-arith EIR-shape +tests), //:test-eir-lowtier (the injected low-tier e2e), //:test-stage0..3. +Functional stage2 ≡ stage3 gate, per the reading this document establishes +(raw binary byte-identity does not hold on macOS for linker-metadata +reasons): stage2 and stage3 each compile and run the ENTIRE test corpus in +identical buck-assembled work dirs with per-test expected-output +comparison — both green constitutes the corpus-level functional-identity +check. Flag-off byte-purity of the Phase 3 lowering itself was +additionally proven at Chunk I review time (pre- vs post-chunk flag-off +executables byte-identical). + +## Reading + +Every P3 gate item holds: zero behavioral divergence across the suite with +the flag on; the probe dir documents exactly which shapes fire and which +degrade (widening, wrong oracle — both by design); the mechanism-level +proof (//:test-eir-lowtier) is now backed by a magnitude measurement (10× +on a pure-numeric kernel, a ceiling not a promise); matrix unaffected flag +off. Phase 3 is complete pending sign-off. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 374a8aa0..806ca0c1 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -403,12 +403,25 @@ Smaller forward items surfaced by the Chunk A integration review: cond_br accepts i1 or legacy "any" conditions. Runtime backlog item found: `_ejs_op_div` aborts EJS_NOT_IMPLEMENTED on non-number LHS (ejs-ops.c ~901) — sub/mul coerce, div doesn't. -- [ ] **P3** oracle-guided guarded arithmetic in `LowerFunction.binary`, +- [x] **P3** oracle-guided guarded arithmetic in `LowerFunction.binary`, `--types`-gated. *Gate:* matrix green + stage2≡stage3 functional gate (flag off); full-suite `--types` diff lane byte-identical; EIR-shape unit tests; microbenchmark delta recorded. + *Done 2026-07-22* (lowering 568efc7; gates this commit). Diamonds for + `+ - * / <` on exact-{number} operands (literals special-cased; + widened unions decline); correctness is guard-borne — proven at + runtime with a wrong oracle (cross-module valueOf-throw → slow path + → caught). Gates: diff lane 458 files, 457 identical, 0 divergent + (independently reproduced 514/514 on a superset), 67 diamonds + suite-wide; test/types/ probe dir documents firing and declining + shapes incl. the wrong-oracle keystone; microbenchmark 10.3× median + on a pure-numeric kernel (3.19s → 0.31s, diamonds=9) — best-case + ceiling, not suite expectation; full matrix + functional stage2≡stage3 + green. Numbers in docs/maam-p0-results.md "Phase 3 gates". The lane + script fails on zero-files-compared and zero-diamonds (vacuous-pass + guards from review). - [ ] **P3.5** differential harness in maam repo (`concreteEval` vs node vs ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. diff --git a/test/types/README.md b/test/types/README.md new file mode 100644 index 00000000..6f713e09 --- /dev/null +++ b/test/types/README.md @@ -0,0 +1,36 @@ +# --types probe census (Phase 3) + +Probe files for the oracle-guided typed-arithmetic fast path +(docs/maam-plan.md, Phase 3). Like `test/modernization/`, these live +OUTSIDE the tester's `*.js` discovery glob in `test/` itself +(subdirectories are not scanned) and are runnable standalone: compile one +with the node-hosted compiler and `--types`, run it, and diff stdout +against `node ` (color-free: `NO_COLOR=1`, `FORCE_COLOR` unset). +The whole-suite behavioral gate is `./buck-test-types-diff.sh`. + +`diamonds=N` below is the count from the `--types` stats line — how many +guarded has_tag/f64 diamonds lowering emitted for the file. The guard +makes every diamond correct regardless of oracle accuracy; these probes +document where the fast path FIRES. + +Census as of 2026-07-22 (echojs @ 568efc7, maam @ 8d6a157): + +| probe | shape | diamonds | vs node | +|---|---|---|---| +| types-locals1 | pure numeric locals (`+ - * / <`) | 6 | match | +| types-params1 | numeric params, module-local call sites (incl. 1/0 → Infinity through the fast fdiv) | 4 | match | +| types-literals1 | literals mixed with typed vars (incl. the unary-minus literal parse `x - -2`) | 5 | match | +| types-widen1 | reassignment widening: num→str and undefined→num bindings do NOT diamond (documented; only exact {number} qualifies) | 0 | match | +| types-loops1 | for/while counters, `<` in loop conditions | 6 | match | +| types-wrongoracle1 | the wrong-oracle guard: lib.js types `inc`'s param {number} from its only local call, main calls `inc("x")` cross-module → slow path, "x1" | 1 (in lib) | n/a¹ | +| types-bench1 | the Phase 3 microbenchmark kernel (adds/muls/divs/compares over typed locals) | 9 | match | + +¹ node cannot execute this file's bare-ESM import layout from test/; +the check here is flag-off vs `--types` executables producing identical +output (verified — and the slow-path routing is the probe's point). + +Wider context (the `--types` diff lane over all of `test/`, 2026-07-22): +458 files, 457 identical flag-off vs `--types`, 0 divergent, 1 N/A +(tester.js, esprima parse gap), 67 diamonds total across the suite. +Suite files are string/object-heavy by design — the diamond count is +expected to be modest outside numeric kernels. diff --git a/test/types/types-bench1.js b/test/types/types-bench1.js new file mode 100644 index 00000000..0d0d7ba3 --- /dev/null +++ b/test/types/types-bench1.js @@ -0,0 +1,19 @@ +// the Phase 3 arithmetic microbenchmark kernel: tight loop of adds/muls/ +// divs/compares over module-local {number} locals — everything the +// oracle can type, nothing else. Also serves as a probe. +function kernel(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + i * i - i / 2; + i = i + 1; + } + return s; +} +var out = 0; +var r = 0; +while (r < 40) { + out = out + kernel(1000000); + r = r + 1; +} +console.log(out); diff --git a/test/types/types-literals1.js b/test/types/types-literals1.js new file mode 100644 index 00000000..ab874c8e --- /dev/null +++ b/test/types/types-literals1.js @@ -0,0 +1,8 @@ +// literals mixed with typed vars: literals are oracle-unmapped glue but +// type directly in lowering (incl. the unary-minus parse of -2) +var x = 10; +console.log(x + 1); +console.log(x * 2); +console.log(x - -2); +console.log(x / 4); +console.log(x < 100); diff --git a/test/types/types-locals1.js b/test/types/types-locals1.js new file mode 100644 index 00000000..ac7f703c --- /dev/null +++ b/test/types/types-locals1.js @@ -0,0 +1,9 @@ +// pure numeric locals: every binary op below is diamond-eligible +var a = 3; +var b = 4; +var c = a * a + b * b; +var d = c / 5; +console.log(c); +console.log(d); +console.log(a - b); +console.log(a < b); diff --git a/test/types/types-loops1.js b/test/types/types-loops1.js new file mode 100644 index 00000000..f3a07c3b --- /dev/null +++ b/test/types/types-loops1.js @@ -0,0 +1,10 @@ +// for-loop counters and < in loop conditions +var total = 0; +for (var i = 0; i < 10; i = i + 1) { + total = total + i * i; +} +var j = 0; +while (j < 5) { j = j + 1; } +console.log(total); +console.log(j); +console.log(i < j); diff --git a/test/types/types-params1.js b/test/types/types-params1.js new file mode 100644 index 00000000..4319d5da --- /dev/null +++ b/test/types/types-params1.js @@ -0,0 +1,7 @@ +// numeric params, module-local call sites: the oracle sees every call, +// types the params {number}, and the bodies diamond +function hyp2(x, y) { return x * x + y * y; } +function scale(v, k) { return v / k; } +console.log(hyp2(3, 4)); +console.log(scale(hyp2(6, 8), 4)); +console.log(scale(1, 0)); // Infinity through a real fdiv fast path diff --git a/test/types/types-widen1.js b/test/types/types-widen1.js new file mode 100644 index 00000000..8a9a3be8 --- /dev/null +++ b/test/types/types-widen1.js @@ -0,0 +1,12 @@ +// reassignment widening: these do NOT diamond (documented behavior). +// `w` holds number THEN string -> the oracle reports num|str for every +// node mapped to it; `u` starts undefined -> number|undefined. Only +// exact {number} qualifies, so expect diamonds=0 — correctness must +// hold regardless (the generic ops run). +var w = 1; +console.log(w + 1); +w = "s"; +console.log(w + "!"); +var u; +u = 2; +console.log(u + 3); diff --git a/test/types/types-wrongoracle1.js b/test/types/types-wrongoracle1.js new file mode 100644 index 00000000..bca512bf --- /dev/null +++ b/test/types/types-wrongoracle1.js @@ -0,0 +1,8 @@ +// the wrong-oracle guard: lib.js's oracle typed inc's param {number} +// (its only module-local call is numeric), but cross-module linking is +// unmodeled — we call it with a string. The has_tag guard must route +// to the slow path and produce "x1": correctness never depends on the +// oracle being right. +import { inc } from "./types-wrongoracle1/lib"; +console.log(inc("x")); +console.log(inc(1.5)); diff --git a/test/types/types-wrongoracle1/lib.js b/test/types/types-wrongoracle1/lib.js new file mode 100644 index 00000000..1e776c9c --- /dev/null +++ b/test/types/types-wrongoracle1/lib.js @@ -0,0 +1,3 @@ +// module-local call sites type n as {number} -> inc's body diamonds... +export function inc(n) { return n + 1; } +console.log(inc(41)); // ...because the oracle only sees THIS call From e4c400110e0ee6eb3b422751fbfba12b42af4f02 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 10:42:54 -0700 Subject: [PATCH 089/146] eir: go straight to bitcode -- drop the textual IR round-trips The per-module pipeline was: print the module as textual .ll -> llvm-as -> .bc -> opt -S (textual .ll.opt) -> llc parses text -> .o. Two full print/parse round-trips of the IR and an extra spawn, a fossil of an era when the bitcode writer couldn't be trusted. It can now: writeBitcodeToFile(.bc) -> opt (bitcode out, .bc.opt) -> llc -filetype=obj -> .o. The llvm-as spawn is gone from both branches; stage0 (node-llvm) and self-hosted stage1+ (ejs-llvm) run the identical pipeline -- both bindings already exposed writeBitcodeToFile, no native changes needed. The long-remembered "invalid IR forced the text path" hypothesis never manifested: zero opt/llc diagnostics across the test corpus, a 400KB esprima module, and all four stage suites. --leave-temp now additionally writes the textual .ll (the same pre-opt module dump the old pipeline always produced -- proven byte-identical in review), so buck-test-lowtier.sh's IR assertions needed no changes. Temp set is .bc/.bc.opt/.o (+.ll under the flag). Measured: self-compile flag-off 6.10s -> 4.98s median (-18%; review bisect reproduced -11-12%), same absolute save under --types; small files improve modestly (node-startup/link-bound). The win scales with module IR size. Backlog notes from review, deliberately not grown into this diff: the two remaining exit handlers still ignore exit codes (pre-existing /* XXX code */ wart, now only two stages wide); both bindings' raw_fd_ostream opens carry twin "// check error" TODOs (old WriteToFile had the same class); the unused llvm-as command-table entry can go in a future sweep. Co-Authored-By: Claude Fable 5 --- ejs-es6.ts | 77 +++++++++++++++++++++++++----------------------------- 1 file changed, 36 insertions(+), 41 deletions(-) diff --git a/ejs-es6.ts b/ejs-es6.ts index 1ce1c720..b8ae797a 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -545,35 +545,39 @@ function compileFile( function tmpfile(suffix: string): string { return `${os.tmpdir()}/${base_filename}-${target_triple.arch}-${target_triple.os}${suffix}`; } - let ll_filename = tmpfile(".ll"); let bc_filename = tmpfile(".bc"); - let ll_opt_filename = tmpfile(".ll.opt"); + let bc_opt_filename = tmpfile(".bc.opt"); let o_filename = tmpfile(".o"); - temp_files.push(ll_filename, bc_filename, ll_opt_filename, o_filename); + temp_files.push(bc_filename, bc_opt_filename, o_filename); let opt_level = options.opt_level > 0 ? `default,` : ""; - let llvm_as_args = [`-o=${bc_filename}`, ll_filename]; - let opt_args = [ - `-passes=${opt_level}strip-dead-prototypes`, - "-S", - `-o=${ll_opt_filename}`, - bc_filename, - ]; + // bitcode end to end: the module serializes straight to .bc (no + // llvm-as spawn, no textual round trip), opt reads and emits bitcode + // (no -S), and llc consumes the optimized bitcode. Both binding sets + // (node-llvm and the self-hosted ejs-llvm) expose writeBitcodeToFile, + // so stage0 and stage1+ run the identical pipeline. + let opt_args = [`-passes=${opt_level}strip-dead-prototypes`, `-o=${bc_opt_filename}`, bc_filename]; let llc_args = target_llc_args(target_triple).concat([ "-filetype=obj", `-o=${o_filename}`, - ll_opt_filename, + bc_opt_filename, ]); - debug.log(1, `writing ${ll_filename}`); - compiled_module.writeToFile(ll_filename); - debug.log(1, `done writing ${ll_filename}`); - - // debug.log (1, `writing ${bc_filename}`); - // compiled_module.writeBitcodeToFile(bc_filename); - // debug.log (1, `done writing ${bc_filename}`); + debug.log(1, `writing ${bc_filename}`); + compiled_module.writeBitcodeToFile(bc_filename); + debug.log(1, `done writing ${bc_filename}`); + + // textual IR is a debug artifact now: written only under --leave-temp + // (buck-test-lowtier.sh greps it for the low-tier float ops — the same + // pre-opt module dump the old pipeline fed to llvm-as) + if (options.leave_temp_files) { + let ll_filename = tmpfile(".ll"); + temp_files.push(ll_filename); + debug.log(1, `writing ${ll_filename}`); + compiled_module.writeToFile(ll_filename); + } compiled_modules.push({ filename: filename, @@ -582,38 +586,29 @@ function compileFile( if (!isNode()) { // in ejs spawn is synchronous. - spawn(llvm_commands["llvm-as"], llvm_as_args); spawn(llvm_commands["opt"], opt_args); spawn(llvm_commands["llc"], llc_args); o_filenames.push(o_filename); compileCallback(); } else { - let llvm_as = spawn(llvm_commands["llvm-as"], llvm_as_args); - llvm_as.stderr.on("data", (data) => console.warn(`${data}`)); - llvm_as.on("error", (err) => { - console.warn(`error executing ${llvm_commands["llvm-as"]}: ${err}`); + debug.log(1, `executing '${llvm_commands["opt"]} ${opt_args.join(" ")}'`); + let opt = spawn(llvm_commands["opt"], opt_args); + opt.stderr.on("data", (data) => console.warn(`${data}`)); + opt.on("error", (err) => { + console.warn(`error executing ${llvm_commands["opt"]}: ${err}`); process.exit(-1); }); - llvm_as.on("exit", (/* XXX code*/) => { - debug.log(1, `executing '${llvm_commands["opt"]} ${opt_args.join(" ")}'`); - let opt = spawn(llvm_commands["opt"], opt_args); - opt.stderr.on("data", (data) => console.warn(`${data}`)); - opt.on("error", (err) => { - console.warn(`error executing #{llvm_commands['opt']}: ${err}`); + opt.on("exit", (/* XXX code*/) => { + debug.log(1, `executing '${llvm_commands["llc"]} ${llc_args.join(" ")}'`); + let llc = spawn(llvm_commands["llc"], llc_args); + llc.stderr.on("data", (data) => console.warn(`${data}`)); + llc.on("error", (err) => { + console.warn(`error executing ${llvm_commands["llc"]}: ${err}`); process.exit(-1); }); - opt.on("exit", (/* XXX code*/) => { - debug.log(1, `executing '${llvm_commands["llc"]} ${llc_args.join(" ")}'`); - let llc = spawn(llvm_commands["llc"], llc_args); - llc.stderr.on("data", (data) => console.warn(`${data}`)); - llc.on("error", (err) => { - console.warn(`error executing ${llvm_commands["llc"]}: ${err}`); - process.exit(-1); - }); - llc.on("exit", (/* XXX code*/) => { - o_filenames.push(o_filename); - compileCallback(); - }); + llc.on("exit", (/* XXX code*/) => { + o_filenames.push(o_filename); + compileCallback(); }); }); } From 51441e3f7778b8ac547934019130b9f6bd215b6d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 11:47:40 -0700 Subject: [PATCH 090/146] maam-plan: add Phase 3.6 -- typed calling convention / specialization Slotted after P3.5 (its hard precondition -- this phase crosses the unguarded-consumption line, so the differential harness must be green first) and before the shapes outline. Captures the design discussion: local closed world per function instead of the too-blunt global closedWorld(), specialized unboxed clones + caller-side unboxing at direct call sites, generic guard-then-call-clone wrappers for escaping/exported functions, specializations() as the so-far-unconsumed data source, and the trust-free pre-work that can land first (dominated-guard elimination; f64 block params at optimizer-created joins). Gate includes extending the wrong-oracle probes to the specialization path: a function that looks closed-world but is not must be rejected by the escape analysis, not miscompiled. Co-Authored-By: Claude Fable 5 --- docs/maam-plan.md | 52 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 806ca0c1..d3623640 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -176,6 +176,46 @@ and diff every output against the flag-off baselines (byte-identical stdout); (each file diffed against `node `); an arithmetic microbenchmark demonstrating the fast path fires. +**Phase 3.6 — typed calling convention / function specialization.** +The Phase 3 diamonds keep every call boxed and re-box at every join; the +remaining order of magnitude lives here. For a function with a **local +closed world** — the closure value never escapes (not exported, never +stored through a degraded write, never an argument to an unknown call: +all trackable as operand flow), every call site enumerated in-module, +argument types proven at each (`specializations()` already computes the +per-function `(param types) → return type` tables; so far unconsumed) — +emit a specialized clone with an unboxed signature (`f64(f64, f64)`-class), +rewrite known call sites to direct calls that unbox at the caller, and +drop the slow path from the clone. Exported/escaping functions keep the +generic boxed form, which becomes a guard-then-call-clone wrapper — the +natural hybrid. This is the point where LLVM finally gets to inline and +do real scalar optimization (the demo's `hypot2` inlines into its +caller's loop and the box/unbox pairs annihilate). + +This crosses the unguarded-consumption line the plan drew: oracle claims +become facts, so **P3.5 (the differential harness) is a hard +precondition**, and per-function local-closed-world evidence replaces the +too-blunt global `closedWorld()` (console.log alone fails that in 90% of +modules). Mechanical prerequisites in EIR: typed function +signatures (a controlled lift of the P2 raw-values-cannot-cross-blocks +rule at specialized function boundaries), a direct-call op carrying the +specialized symbol (`imms.direct`'s typed sibling), and static callee +checks (no `arguments`/rest/defaults/`this` in the clone). GC is +indifferent (conservative scan tolerates raw doubles; false retention +only). + +**Trust-free pre-work, can land before or alongside P3.5** (visible in +the Phase 3 demo dumps): (a) dominated-guard elimination — `hypot2`'s +first diamond tests `has_tag %2` twice and later diamonds re-test values +already proven number on the fast edge; merging dominated guards turns +three diamonds into one guard region with one slow path, guard-safe, no +new trust; (b) f64 block params for optimizer-created joins, so fast +regions compute unboxed end-to-end and box once — kills the bits_alloca +round-trips the Phase 3 benchmark flagged as headroom. Longer-term this +phase dovetails with the IR-in-manifest direction (2026-07-08): +cross-module specialization is the same machinery with a bigger closed +world. + **Phase 4 (outline only) — shapes.** `result.layouts()`/`constructors()` give monomorphic allocation sites with struct offsets. Consuming them (fixed-offset property access) needs a shape @@ -425,5 +465,17 @@ Smaller forward items surfaced by the Chunk A integration review: - [ ] **P3.5** differential harness in maam repo (`concreteEval` vs node vs ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. +- [ ] **P3.6** typed calling convention / function specialization + (see the Phase 3.6 section). Pre-work (trust-free, may land first): + dominated-guard elimination + f64 block params for + optimizer-created joins. Main work (HARD PRECONDITION: P3.5 green): + local-closed-world escape analysis, specialized unboxed clones + + direct calls, generic wrapper for escaping/exported functions. + *Gate:* matrix green; --types diff lane still byte-identical; + wrong-oracle probes extended to the specialization path (a + function that LOOKS closed-world but isn't must be provably + rejected by the escape analysis, not miscompiled); demo-class + benchmark showing the clone inlines (delta vs the Phase 3 10.3× + ceiling recorded). - [ ] **P4** (design doc only) shape-guarded property access: guard op, runtime layout, promotion criteria from Phase 3 experience. From d16d3833a133a7770c6a296d1edd05445e85ce0a Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 12:06:13 -0700 Subject: [PATCH 091/146] maam-plan: split P3.4 pre-work out; exports are never specialized The checklist now reads in true execution order: P3.4 (trust-free diamond pre-work -- dominated-guard elimination + f64 block params for optimizer-created joins; needs nothing from the harness) -> P3.5 (differential harness) -> P3.6 (specialization, hard-gated on P3.5) -> P4 (shapes). P3.6 sharpened per discussion: module-level exports are never specialization candidates, even with whole-program analysis -- the slot-based module ABI exposes boxed ejsvals to both JS and native consumers, and changing an export's signature breaks that contract. Instead an export's generic boxed entry is conservatively typed and carries Phase-3-style boundary guards that dispatch to the specialized clone when they pass. IR-in-manifest cross-module analysis can widen what the guards know; it does not remove the boxed ABI. Co-Authored-By: Claude Fable 5 --- docs/maam-plan.md | 64 ++++++++++++++++++++++++++++++++--------------- 1 file changed, 44 insertions(+), 20 deletions(-) diff --git a/docs/maam-plan.md b/docs/maam-plan.md index d3623640..3f2f3270 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -176,6 +176,21 @@ and diff every output against the flag-off baselines (byte-identical stdout); (each file diffed against `node `); an arithmetic microbenchmark demonstrating the fast path fires. +**Phase 3.4 — diamond pre-work (trust-free optimizer passes).** +Two passes that pay off on the Phase 3 diamonds immediately and change +nothing about the trust story (guard-borne correctness holds; a wrong +oracle still only costs speed), visible in the Phase 3 demo dumps: +(a) **dominated-guard elimination** — `hypot2`'s first diamond tests +`has_tag %2` twice, and later diamonds re-test values already proven +number on the fast edge; merging dominated guards turns three diamonds +into one guard region with one slow path; (b) **f64 block params for +optimizer-created joins** — a controlled lift of the P2 +raw-values-cannot-cross-blocks rule, scoped to joins the optimizer +itself builds, so fast regions compute unboxed end-to-end and box once +at the region exit — kills the bits_alloca round-trips the Phase 3 +benchmark flagged as headroom. Sequenced before P3.5 because it needs +none of it. + **Phase 3.6 — typed calling convention / function specialization.** The Phase 3 diamonds keep every call boxed and re-box at every join; the remaining order of magnitude lives here. For a function with a **local @@ -186,11 +201,18 @@ argument types proven at each (`specializations()` already computes the per-function `(param types) → return type` tables; so far unconsumed) — emit a specialized clone with an unboxed signature (`f64(f64, f64)`-class), rewrite known call sites to direct calls that unbox at the caller, and -drop the slow path from the clone. Exported/escaping functions keep the -generic boxed form, which becomes a guard-then-call-clone wrapper — the -natural hybrid. This is the point where LLVM finally gets to inline and -do real scalar optimization (the demo's `hypot2` inlines into its -caller's loop and the box/unbox pairs annihilate). +drop the slow path from the clone. **Module-level exports are never +specialization candidates** — not even with whole-program analysis: +the slot-based module ABI exposes boxed ejsvals to both JS and native +consumers, and specializing an export's signature would break that +contract. Instead the export's generic boxed entry is *conservatively +typed* and carries Phase-3-style guards at the boundary — exactly the +hypot2-shape diamonds — dispatching to the specialized clone when they +pass and keeping the generic path otherwise. The same wrapper shape +serves any function that escapes locally. This is the point where LLVM +finally gets to inline and do real scalar optimization (the demo's +`hypot2` inlines into its caller's loop and the box/unbox pairs +annihilate) — with the boxed world intact at every ABI boundary. This crosses the unguarded-consumption line the plan drew: oracle claims become facts, so **P3.5 (the differential harness) is a hard @@ -204,17 +226,12 @@ checks (no `arguments`/rest/defaults/`this` in the clone). GC is indifferent (conservative scan tolerates raw doubles; false retention only). -**Trust-free pre-work, can land before or alongside P3.5** (visible in -the Phase 3 demo dumps): (a) dominated-guard elimination — `hypot2`'s -first diamond tests `has_tag %2` twice and later diamonds re-test values -already proven number on the fast edge; merging dominated guards turns -three diamonds into one guard region with one slow path, guard-safe, no -new trust; (b) f64 block params for optimizer-created joins, so fast -regions compute unboxed end-to-end and box once — kills the bits_alloca -round-trips the Phase 3 benchmark flagged as headroom. Longer-term this -phase dovetails with the IR-in-manifest direction (2026-07-08): -cross-module specialization is the same machinery with a bigger closed -world. +Pre-work lives in Phase 3.4 (trust-free, sequenced first). Longer-term +this phase dovetails with the IR-in-manifest direction (2026-07-08): +cross-module ANALYSIS through manifests can widen which internal calls +are provably typed — but the export-boundary rule above stands +regardless; manifests inform the guards, they don't remove the boxed +ABI. **Phase 4 (outline only) — shapes.** `result.layouts()`/`constructors()` give monomorphic allocation sites with @@ -462,15 +479,22 @@ Smaller forward items surfaced by the Chunk A integration review: green. Numbers in docs/maam-p0-results.md "Phase 3 gates". The lane script fails on zero-files-compared and zero-diamonds (vacuous-pass guards from review). +- [ ] **P3.4** diamond pre-work, trust-free (see the Phase 3.4 section): + dominated-guard elimination + f64 block params for + optimizer-created joins. + *Gate:* matrix green; --types diff lane still byte-identical; + EIR-shape unit tests (merged guard region; unboxed fast region + boxing once); types-bench1 + the hypot2 demo re-measured, deltas + vs the Phase 3 baselines recorded. - [ ] **P3.5** differential harness in maam repo (`concreteEval` vs node vs ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. - [ ] **P3.6** typed calling convention / function specialization - (see the Phase 3.6 section). Pre-work (trust-free, may land first): - dominated-guard elimination + f64 block params for - optimizer-created joins. Main work (HARD PRECONDITION: P3.5 green): + (see the Phase 3.6 section; HARD PRECONDITION: P3.5 green): local-closed-world escape analysis, specialized unboxed clones + - direct calls, generic wrapper for escaping/exported functions. + direct calls; exports are NEVER specialized (boxed slot ABI is a + contract with JS and native consumers) — their generic entries get + conservatively-typed boundary guards dispatching to the clone. *Gate:* matrix green; --types diff lane still byte-identical; wrong-oracle probes extended to the specialization path (a function that LOOKS closed-world but isn't must be provably From 08cf3880bfe8202b7a3e92e40d4cbc912de9ba3f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 21:30:05 -0700 Subject: [PATCH 092/146] gc-plan: mostly-copying generational collector -- the design doc The plan for replacing the conservative stop-the-world mark-sweep in runtime/ejs-gc.c: per-thread bump-pointer nursery, cell-granularity pinning under mostly-copying (Bartlett), card-marked write barrier, concurrent-with-mutators old-gen marking as a later phase. Precise roots via LLVM statepoints are ruled out by NaN-boxing; the doc dissects statepoints / stackmap-pinning / shadow-stack / object-model changes and picks stackmap-assisted pinning as the precision upgrade. Written across a design discussion; landing it next to maam-plan.md as the second standing roadmap doc. Co-Authored-By: Claude Fable 5 --- docs/gc-plan.md | 774 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 774 insertions(+) create mode 100644 docs/gc-plan.md diff --git a/docs/gc-plan.md b/docs/gc-plan.md new file mode 100644 index 00000000..9a0ef371 --- /dev/null +++ b/docs/gc-plan.md @@ -0,0 +1,774 @@ +# GC plan: from conservative mark-sweep to a moving generational collector + +A proposal for replacing echojs's stop-the-world conservative mark-and-sweep +collector (`runtime/ejs-gc.c`) with a generational, compacting, *mostly-copying* +collector — in independently-landable phases, each of which leaves the tree +green and shippable. + +This document is deliberately honest about which of the requested attributes are +reachable cheaply, which are reachable expensively, and which are in tension +with decisions already baked into the engine (chiefly NaN-boxing and a +`-O2`-compiled mutator with values living in registers). The headline: **you can +have moving + generational + low-pause without precise stack maps, and given +this codebase that is almost certainly the right trade.** The path that *sounds* +like what you asked for — "precise, via LLVM stackmaps" — is a dead end here for +a concrete reason the codebase already discovered, and I'll show why. + +## What we have today, as found + +- **Collector** (`runtime/ejs-gc.c`, 1676 lines): stop-the-world, single-threaded + ("very simple stop the world collector", `ejs-gc.c:1123`), tri-color + mark-and-sweep, **non-moving**. Trigger is 60 MB of allocation since the last + cycle (`ejs-gc.c:1408`), plus `GC.collect()`, allocation-failure fallbacks, + and shutdown. +- **Allocator**: segregated free-lists in size classes 16–256 bytes over 32 MB + arenas, with a per-page bump pointer for fresh pages (`alloc_from_page`, + `ejs-gc.c:1305`) and a large-object store (LOS) for anything `> 256` bytes + (`alloc_from_los`, `ejs-gc.c:1352`). Mark bits are a per-cell bitmap in each + `PageInfo` (`ejs-gc.c:341`). +- **Heap is already precisely traceable.** Every object carries a per-class + `Scan` spec-op (`ejs-object.h:161,190`) and there are typed scanners for + strings, symbols, and closure environments (`_scan_from_ejsprimstr` etc., + `ejs-gc.c:755-789`). The collector already knows the exact outgoing edges of + every heap object. This is the single most important asset we have. +- **Roots are *not* precise.** Three sources: + 1. an explicit root set — a linked list of `ejsval*`, ~142 registrations, + almost all static global singletons (85 in `ejs-init.c` alone), plus 11 + genuinely dynamic ones in `ejs-promise.c:61-116` (`ejs-gc.c:188-193`, + `mark_from_roots` at `:960`); + 2. module exotics, scanned from a static array (`mark_from_modules`, `:988`); + 3. **a conservative scan of the C stack and spilled registers** + (`mark_thread_stack`, `:1060`; `MARK_REGISTERS`, `:1005-1058`), which reads + every stack/register word and treats anything that *looks* like a heap + pointer — tagged ejsval *or* raw untagged pointer, **including interior + pointers** — as a root. +- **Value representation**: SpiderMonkey-style NaN-boxing (`runtime/ejsval.h`). + A GC pointer lives *inline* in the low 47 bits of an 8-byte value + (`EJSVAL_TO_GCTHING_IMPL`, `ejsval.h:929`); all heap addresses are forced + below 2⁴⁷ (`mmap_boxable`, `ejs-gc.c:199`). +- **Compiler emits no GC support at all.** The eir backend (`lib/eir/emit.ts`) + keeps JS locals as pure SSA values in registers — "locals never touch memory" + (`emit.ts:9-11`); the only allocas are the outgoing-arg scratch area and a + `&this` slot. There are **no** statepoints, stackmaps, gcroots, safepoints, or + GC address-spaces. `lib/abi.ts:34-46` / `lib/compiler.ts:402-406` contain dead + `llvm.gcroot` code with a comment explaining why it was abandoned (below). +- **No write barriers anywhere** (`runtime/`, `lib/` — nothing). No card table, + no remembered set, no handle/`Rooted<>` abstraction. +- **Single-threaded.** No `pthread_create`, no workers, no TLS; the GC's + `LOCK_*` macros are all empty no-ops (`ejs-gc.c:100-105`). One event loop on + the main thread. +- **Build**: Buck2, Homebrew LLVM (nominally 16), runtime compiled `-O0`, user + JS compiled `-O2`. A new collector `.c` goes in `runtime/BUCK`'s + `shared_sources` (`:50-88`) and must compile as Objective-C on macOS. + +## Your eight attributes, scored honestly + +| # | Requested | Verdict | +|---|-----------|---------| +| 1 | Per-thread bump nursery; large → old gen | **Nursery: yes.** "Per-thread" is moot — the engine is single-threaded. Build a single-mutator bump nursery; route LOS-sized allocations straight to old gen. | +| 2 | Precise, via LLVM stackmaps | **Partly — and more hopefully than "no".** `gcroot`/`gc.statepoint` are out (they need reference-typed values; NaN-boxed ejsvals are `i64`). But `llvm.experimental.stackmap` records i64 locations and *does* work with NaN-boxing — fork-free precise **marking/pinning** roots, though not relocatable ones. Relocatable precise roots need either a value-rep change or a manual shadow stack. Full treatment in §"The LLVM precise-root question". | +| 3 | Fastest old→young write detection | **Yes: card marking + a generational store barrier.** Must be built from scratch and threaded through both the runtime stores and the compiler's store sites. The effect table already labels every store `E.WRITE` (`ops.ts:17`), which is where the barrier goes. | +| 4 | Moving | **Yes — via mostly-copying.** This is the core proposal. | +| 5 | Concurrent (collector runs alongside the mutator) | **First-class goal, staged.** The mutator stays single-threaded; the *collector* gets its own thread. Realistic first target: **concurrent marking** (SATB barrier) + a brief stop-the-world evacuation of survivors; then fully concurrent evacuation (forwarding/load barrier). A single mutator makes safepointing tractable. See §"Concurrent collection". | +| 6 | Extremely low pause | **Yes, via #5.** Generational alone makes minor pauses sub-millisecond (nursery + remembered set only). "Extremely low regardless of live set" comes from concurrent marking + concurrent evacuation — designed toward from Phase 3's barrier, not bolted on. | +| 7 | Competitive with V8 / SpiderMonkey | **Not gated by the collector.** echojs has no inline caches and uses per-object hash-map property stores (`_EJSPropertyMap`, `ejs-object.h:128`); it's AOT, not a JIT. GC is not its bottleneck and a great GC won't make it competitive. A generational mover *will* make allocation and collection cost competitive; the engine overall won't be. Said plainly so the effort is aimed right. | +| 8 | As few knobs as possible | **Yes, and easy to hold to.** One auto-tuned heap-growth target, no generation-size zoo. See §Knobs. | + +## The root problem: why conservative roots and moving are in tension + +A moving collector must find and *rewrite* every pointer to a moved object. The +heap edges we can already enumerate precisely. The **roots** we cannot, and here +is the bind: + +1. **NaN-boxing puts raw pointers inside `i64` values.** To use LLVM's precise + GC (`gcroot` / `gc.statepoint` + `RewriteStatepointsForGC`), a GC reference + must be a *reference-typed* SSA value (`ptr addrspace(1)`). An ejsval is an + `i64` that is *sometimes* a pointer and sometimes a double/int/bool. You + cannot hand LLVM an `i64` and ask it to relocate it. The codebase already hit + this wall — the `gcroot` call in `abi.ts:34-46` is commented out with exactly + this reasoning ("with the nan boxing we kinda lose out as the llvm IR code + doesn't permit non-reference types to be gc roots"). Using LLVM's machinery + would mean **un-NaN-boxing the value representation** — a change that touches + every file in `runtime/`, throws away the boxing's speed and density, and is + not on the table. + +2. **Even if JS frames were precise, the C runtime isn't.** Every + `EJS_NATIVE_FUNC` (`ejs.h:100`) holds bare `ejsval` locals across allocation + points — `Array.prototype.map` keeps `O`, `A`, `kValue`, … live across a loop + that allocates every iteration (`ejs-array.c:1171-1225`), and this pattern is + pervasive. There is no handle/`Rooted<>` scope anywhere (`§4` of the survey). + Making these precise means introducing a handle API and rewriting hundreds of + runtime functions to use it — the SpiderMonkey "exact rooting" migration, + which took Mozilla years. + +So precise rooting is not one project; it's two large ones (de-box the compiler +*and* handle-ize the runtime), and the first is foreclosed by NaN-boxing. + +**The resolution is to stop fighting it.** A collector can be moving *without* +precise roots if it can tolerate a set of ambiguous, un-rewritable references — +by refusing to move exactly the objects those references point at. That is +Bartlett's *mostly-copying* collector, and it is a near-perfect fit for an +engine that already does conservative scanning and already has precise heap +tracing. + +The rest of the "can't we just make roots precise?" question — including your +specific asks about bending `gcroot` and about typing ejsval as a reference — is +answered in full in the next section before we get to the collector proper. + +## The LLVM precise-root question, in full + +You asked whether we can bend `llvm.gcroot`, add our own mechanism without +forking LLVM, or type ejsval as a reference instead of an `i64`. Here is the +full lay of the land — more hopeful than the one-line "dead end", with two sharp +caveats. + +### How the machinery actually works (nothing moves on its own) + +Worth pinning down first, because it's the crux of the "why not just type it as a +reference?" question: **LLVM has no GC runtime, and address spaces are not regions +of your heap.** `addrspace(1)` is a compile-time *type tag* meaning "this pointer +is a GC-managed reference" (the address space `RewriteStatepointsForGC` treats as +GC is a convention, conventionally 1). It does not correspond to +from-space/to-space, nursery/old-gen, or any physical region — those are entirely +your runtime's concept, invisible to LLVM. Nothing is "automatically relocated +between spaces." + +All actual moving and pointer-rewriting is done by **your collector code**. +LLVM's whole contribution is at compile time, three things: +1. **identify** which live SSA values are GC references (by their `addrspace(1)` + type) at each safepoint; +2. **emit a stackmap** recording *where* each live reference sits (register or + stack slot) at that safepoint, into a section your runtime parses; +3. **insert `gc.relocate`** so that after a safepoint the compiled code re-reads + each GC pointer from its (possibly collector-updated) slot instead of reusing + a stale copy it was holding in a register. + +Runtime loop: mutator hits a safepoint → your collector walks the stackmap and, +per slot, reads the pointer, moves the object, writes the new address back → the +`gc.relocate`-lowered code reloads the updated pointer. Step 3 is the entire +reason statepoints exist and why "just scan the stack" can't *move*: without a +forced reload the compiler could keep a pre-move pointer in a callee-saved +register across the call, and your slot update would be silently ignored. + +So — *can't the collector just interrogate each value and skip the NaN-boxed +scalars?* On the read side, **yes**: the collector is your code and can decline to +move any slot. The breakage isn't there; it's the compile-time contract, next. + +### What LLVM offers, and why each does or doesn't fit an i64 ejsval + +**1. `llvm.gcroot` (classic shadow-stack intrinsic).** Signature is +`@llvm.gcroot(ptr %ptrloc, ptr %metadata)` where `%ptrloc` must be an *alloca of +pointer type*; a registered `GCStrategy` (e.g. `ShadowStackGC`) threads those +slots onto a list. It deals in **pointer-typed stack slots**. An ejsval is an +`i64` that is only *sometimes* a pointer; you can't hand `gcroot` an `i64` slot, +and bitcasting makes a boxed double's bits into a bogus "root." This is exactly +the wall the abandoned code in `lib/abi.ts:34-46` hit. Unusable as-is. + +**2. `llvm.experimental.gc.statepoint` + `gc.relocate` (the moving-GC path).** +GC references are `ptr addrspace(1)`; calls become statepoints; +`RewriteStatepointsForGC` inserts `gc.relocate` so every post-call use reloads +the possibly-moved pointer. The relocate is the crucial part — it's the *only* +thing in LLVM that makes moving-through-the-stack sound, because it forces the +reload. But GC values must be **real pointers**: incompatible with polymorphic +i64 ejsvals. + +**3. `llvm.experimental.stackmap` / `patchpoint` (the sleeper — works with +NaN-boxing).** `stackmap(i64 id, i32 shadow, ...live values...)` records the +**locations** (register or stack slot) of arbitrary-typed operands — **including +`i64`** — into an `__LLVM_StackMaps` section. So you list the live ejsvals at +each safepoint; the collector parses the map, reads each location, applies the +NaN-box tag test, and gets a **precise root set** with none of conservative +scanning's false positives (integers that look like pointers, dead slots, +interior-pointer ambiguity). No fork, no un-boxing. **The caveat:** a stackmap +*records* a location, it does not *relocate*. LLVM still treats the SSA value as +invariant — it may keep copies in other registers, rematerialize, or CSE it — so +overwriting the recorded slot is not guaranteed to be seen by every later use. +Hence stackmaps give precise **marking/pinning**, not general stack relocation. +(Closing that gap is exactly what statepoints are for.) + +**4. Custom `GCStrategy` + `GCMetadataPrinter` (fork-free extension points).** +You can register your own strategy and stackmap emitter in-tree, controlling +safepoint placement and map *format*. What this does **not** change is the type +discipline — a strategy still consumes `gcroot`/statepoint-shaped IR. Older LLVM +exposed `GCStrategy::performCustomLowering` to rewrite `gcroot`/`gcread`/`gcwrite` +yourself; it was deprecated/removed as statepoints took over and isn't a stable +base in LLVM 16. GCStrategy customizes *emission*, not *semantics*. + +**5. "Adding our own" mechanism.** A genuinely new *intrinsic* means editing +LLVM's tablegen — a fork; don't. The fork-free equivalent: mark safepoints with +a convention (a call to a known symbol, or `stackmap`) and run an **out-of-tree +LLVM pass** (loadable via the pass-plugin interface — no fork) that does the +lowering using the frontend's own liveness/type info to select the GC roots. +That pass can either emit `stackmap` intrinsics or spill live GC values into a +frame you control (a shadow stack). Both are fork-free and both work with i64. + +### Could ejsval be a *reference type* instead of an i64? + +Directly to your follow-up: **not uniformly, and not without changing how it's +used.** The subtlety is worth stating precisely, because it is *not* "LLVM will +relocate a double behind your back" — per the mechanics above, LLVM moves nothing +and your collector can inspect any slot and skip the scalars. The real +incompatibility is between two contracts on the same 64 bits: + +- **NaN-boxing needs an integer view.** Every tag test and every unbox of a + double/int32 is integer bit-twiddling on the value. +- **A `ptr addrspace(1)` value may only be touched as a relocatable pointer.** To + bit-twiddle it you must `ptrtoint`, and the integer you extract is invalidated + the instant a collection moves the object (its address changed; your captured + integer didn't). In a *non-integral* address space (`ni:` — the mode that + exists precisely for tagged/boxed pointers), `ptrtoint`/`inttoptr` aren't even + meaningful bit-preserving ops, so you can't NaN-box in it at all. Separately, + the optimizer may assume pointer semantics (e.g. two bitwise-equal addrspace(1) + values denote the same object) that NaN-boxed scalars violate. + +So a value can be *a thing LLVM relocates* **or** *a thing you NaN-box*, not both. +Soundness requires an invariant NaN-boxing violates: *every value of the +GC-reference type is actually a pointer, touched only as a pointer.* + +Three real options follow from that: + +- **Non-integral address space (`ni:`) — keeps the bits, doesn't buy moving.** + LLVM lets you mark an address space *non-integral* so the optimizer won't do + `inttoptr`/`ptrtoint` round-trips or assume the pointer's bits equal an integer + address (Julia carries GC refs this way). You *can* thus carry a tagged/boxed + value as a pointer type without the optimizer miscompiling it. But it does + **not** teach `RewriteStatepointsForGC` that some of those "pointers" are + really doubles — so it does not make the polymorphic case safe to relocate. It + helps only once references are already split out from immediates. + +- **Split the representation (tagged pointers) — the sound way to get a reference + type.** Make *references* (object/string/env) real `ptr addrspace(1)` values + and *immediates* (int31/bool/null/undefined) non-pointer, with doubles either + boxed or kept on a NaN-box side-path. Now the GC pointer type genuinely only + ever holds pointers, statepoints work, and you get LLVM-managed moving. This + **does** change "our use of it": doubles no longer share the pointer slot via + NaN tricks. It's the object-model change in §"Object-model changes" (value + representation), and it's the only way to a uniformly reference-typed ejsval. + +- **Type-split via the oracle (hybrid) — reference type where it's provably a + reference.** Where the maam type-oracle proves a value is an object/string/env, + represent *that value* as `ptr addrspace(1)` and let statepoints relocate it + precisely; where the type is `any` or number, keep the i64 NaN-box and + pin/shadow-stack it. ejsval stops being one uniform LLVM type and becomes + representation-selected per value — a bigger compiler change, but exactly what + the planned specialization work (maam-plan Phase 3.6) already sets up. This is + the most sophisticated end state and the one that most directly grants your + original "precise via LLVM" wish, for the typed fraction of the program. + +### The three fork-free destinations, ranked for echojs + +- **(i) Precise *pinning* roots via `stackmap` — recommended upgrade to + mostly-copying.** Keep NaN-boxing. The frontend (which already tags safepoints + via the `E.GC` effect, `ops.ts:15`) emits `llvm.experimental.stackmap` listing + live values; the collector reads exact roots and pins their blocks — strictly + fewer pinned blocks than conservative scanning, no C-runtime changes, no + un-boxing. Doesn't let stack-rooted objects *move*, but in mostly-copying they + don't need to. The natural precision upgrade if Phase-0 says conservative + pinning is too coarse. +- **(ii) Precise *relocatable* roots via a manual shadow stack — keeps + NaN-boxing, enables moving through the stack.** The frontend spills live + GC-typed ejsvals into an explicit per-frame struct (chained thread-wide) at + safepoints and reloads after. Because the values live in *memory you own*, the + collector rewrites them and the mutator reloads the moved pointer — relocation + without statepoints and without un-boxing. Cost: spill/reload at safepoints for + live GC values (gives up "locals never touch memory" *at safepoints only*), and + the C runtime needs handle scopes to participate or stays pinned. +- **(iii) Precise relocatable roots via native statepoints — needs the value-rep + split above.** Only reachable once GC references are real addrspace(1) + pointers. Then LLVM does the relocation bookkeeping, and it composes with the + oracle hybrid. + +The through-line: **you need neither a fork nor the end of NaN-boxing to get +*precise* roots — only to get *LLVM-managed relocatable* roots.** Precise pinning +(stackmaps) and precise relocation-via-shadow-stack are both fork-free and +NaN-box-compatible; native statepoint relocation is the only option gated on the +value representation. + +## The proposal: a mostly-copying generational collector + +### Core idea (Bartlett, 1988; generational variant Bartlett 1989) + +- Partition the heap into **pages/blocks** owned by a space (nursery, old gen). +- **Roots are still scanned conservatively** — C stack, spilled registers, + `-O2` JS frames, the existing root set, exactly as today. Each ambiguous root + that resolves into a heap block **promotes that block in place**: the block is + logically moved to to-space *without relocating its contents* ("pinned" this + cycle). This is cheap — it's a flag flip on the block, not a copy. +- Every **precisely-known** reference (heap-internal edges via the `Scan` ops, + and the precise root set) is **evacuated**: the target object is copied to a + fresh to-space block and a **forwarding pointer** is left behind; the + referring slot is rewritten to the new address. +- Because the heap is precisely traceable, all *heap→heap* edges get rewritten. + Because roots are conservative, all *root→heap* edges pin rather than move. + Both are sound; the only cost of conservatism is a little floating garbage and + some un-compacted (pinned) blocks per cycle. + +This gives you attributes **1, 3, 4, 6, 8** with **zero compiler root changes** +and **zero rewrite of the C runtime**. It degrades gracefully: in the worst case +(everything pinned) it's a non-moving mark-sweep, i.e. no worse than today. + +### Why it fits echojs specifically + +- The conservative scanner already exists and is battle-tested, including the + nasty parts — interior pointers into closure-env slots, raw unboxed pointers + in registers, callee-saved SIMD spills (`ejs-gc.c:823-833, 1016-1041`). We + *keep* all of it; it becomes the "block pinning" oracle instead of the "mark + everything" oracle. +- Precise heap tracing already exists (`Scan` ops). Evacuation reuses it almost + verbatim: where the mark phase today grays a target, the moving phase copies + it and updates the slot. +- The mutator is single-threaded, so there's no safepoint-coordination or + read-barrier problem for the moving itself — the world is already stopped + inside `_ejs_gc_alloc`. + +### Heap architecture + +``` + ┌───────── nursery ─────────┐ ┌──────────── old gen ────────────┐ +alloc → │ bump pointer, one block │ │ block-structured, per-block │ + │ chain; small objs only │ │ pin/age/mark metadata; compacted │ + └───────────────────────────┘ │ by evacuation of unpinned blocks │ + └──────────────────────────────────┘ + ┌──── LOS ────┐ + size > threshold ───→ │ mmap'd, never moved, per-object header │ + └──────────────────────────────────────┘ +``` + +- **Nursery**: a chain of blocks allocated by a single bump pointer + (generalizing the existing per-page `bump_ptr`, `ejs-gc.c:1317`). Fast path is + pointer-increment + limit-check, inlinable. Objects larger than a block + fraction, and all current LOS-sized objects, bypass the nursery and are born + in old gen / LOS (your attribute 1). +- **Minor collection** evacuates live nursery survivors into old-gen blocks, + using the **remembered set** (old→young pointers) plus the conservatively + scanned roots as its root set. Ambiguous roots pin at **cell** granularity (not + whole pages — see below); movable survivors, *including neighbors sharing a + block with a pinned cell*, are evacuated out; a block that contained no pins is + returned wholesale, and a block that contained one becomes an old-gen free-list + block holding just the pinned cell(s). +- **Major collection** traces the whole heap; unpinned old-gen blocks are + evacuated/compacted, pinned blocks are swept in place (mark-sweep fallback for + exactly the blocks conservatism forces). +- **Reuse the arena/block machinery** already in `ejs-gc.c` (`Arena`, `PageInfo`, + `alloc_page_from_arena`) — the space partitioning is a relabeling and a + metadata extension of what's there, not a from-scratch allocator. + +### Forwarding pointers and the object header + +`GCObjectHeader` is a bare `uint32_t` today (`ejs-types.h:30`): scan-type in the +low 16 bits, user flags in the high 16 (`ejs-gc.h:21-23`). A mover needs, per +object: a forwarded bit + a place to stash the forwarding address, plus (for +generational) an age and a card/log bit. + +- **Standard Cheney trick needs no extra space**: copy the object to to-space + *first*, then overwrite the from-space copy's first word with the forwarding + pointer (low bits are free — objects are 8-aligned) and a forwarded tag. The + original first word is already safely in to-space. So forwarding itself is + free. +- **Widen the header to 64 bits anyway**, for age/pin/mark/log bits and to keep + the mask bookkeeping sane. For `EJSObject` this is *free*: `gc_header` (4B) is + today followed by 4B of padding before the 8-byte `ops` pointer, so widening + to 8B leaves `ops` at offset 8 and **shifts no other field** — critically, + compiled code's view of object layout (`lib/types.ts`) is unchanged. For + `EJSClosureEnv` (`gc_header` then `uint32_t length`, `ejs-closureenv.h:9-13`) + and `EJSPrimString` (`gc_header`, `length`, `hash`, `ejs-string.h:77-95`) the + second word shifts; those two layouts and their compiler mirrors must move in + lockstep. This is mechanical but must be a single atomic change. + +### Pinning granularity, and the premature-promotion trap + +The obvious failure mode of mostly-copying: a single pinned object drags an +entire page. Classic Bartlett *does* pin at page granularity — it flips the +page's space id (a metadata operation, no copy — promotion is cheap; that is the +whole appeal) and leaves everything on the page in place, dragging live-but- +movable neighbors *and* short-lived garbage into the older generation. Freshly +allocated objects are the ones most likely to be live in registers / on the stack +at a collection, so this hits the **nursery hardest**, exactly where premature +promotion is most wasteful. + +echojs is not stuck with page granularity. The allocator is **segregated with +fixed per-page cell sizes**, and `find_page_and_cell` / `PTR_TO_CELL` +(`ejs-gc.c:78, 519-560`) already resolves any interior pointer to an exact cell. +So an ambiguous root can pin **the cell**, not the page: evacuate every movable +survivor (including neighbors of a pinned cell) out, leave only the pinned cells, +and convert the block to an old-gen free-list block whose other cells rejoin the +allocator (the current allocator is already free-list based). Pinning then costs +**pinned bytes**, not **blocks-touched × page-size**. + +Two residual costs remain and must be measured, not hand-waved: +1. **Pinned objects tenure early and don't compact** this cycle — wasteful if they + were about to die. +2. **Any block with ≥1 pinned cell can't be wholesale bump-reset**, so it leaves + the clean-nursery fast path; enough scattered pins and you accumulate + partially-full retained blocks. Track a *retained-block count*, not just a + pinned-byte count. + +This is the strongest argument for the stackmap-precision upgrade (destination +(i)), and a *targeted* one: precise roots matter most for the **young generation**, +because that's where conservative false-positives translate directly into +premature promotion. (Retaining a pinned block in the young gen and retrying next +cycle avoids early tenuring but forfeits the clean bump-reset and adds holey young +blocks — usually not worth it; promote-and-move-on is simpler and pinned objects +mostly would have survived the minor cycle anyway.) + +### Moving each object kind + +- **EJSObject**: copy the struct; the out-of-line `EJSPropertyMap` + (`ejs-object.h:128`) is malloc'd, *not* in the GC heap — leave it in place, it + moves with nobody. Its contained ejsvals are already visited by the object's + `Scan` op and get rewritten there. (Longer term the property map is a good + candidate to pull into the GC heap so it compacts too, but not required.) +- **EJSClosureEnv**: copy header + `length` + `slots[]`; rewrite each slot. + Watch the **interior-pointer** case — optimized code holds + `_ejs_closureenv_get_slot_ref` addresses (`emit.ts:624-641`) with the env base + dead. A raw interior pointer to a slot is an *ambiguous root* → it pins the + env's block. Correct and safe; costs a little compaction. (This is the single + biggest source of pinning and worth measuring early.) +- **Strings** (`ejs-string.h`): flat strings with an inline buffer copy fine; + flat strings with an **out-of-line** buffer (`EJS_PRIMSTR_HAS_OOL_BUFFER`) keep + the malloc'd buffer in place and just carry the pointer. Ropes and dependent + strings hold `EJSPrimString*` children — rewrite them like any other edge + (already enumerated by `_scan_from_ejsprimstr`, `ejs-gc.c:755`). +- **LOS**: never moved (as today). Ambiguous roots to LOS objects are a no-op + beyond marking. +- **Generators**: today their stacks are **not scanned at all** + (`mark_generator_stacks` is a stub, `ejs-gc.c:1086`) — a latent correctness + bug. A suspended generator frame holds live ejsvals; under a mover it must at + minimum pin whatever it references. This must be fixed *before* moving, or + generators will corrupt. Flagged as a Phase-0 prerequisite. + +### Write barriers and the remembered set + +Generational collection requires catching **old→young** stores so minor +collections can treat old-gen writers as roots without scanning all of old gen. + +- **Mechanism**: card marking. Divide old gen into cards (e.g. 512 B); a store + into an old-gen object dirties its card; minor collection scans only dirty + cards. Card marking is the cheapest known barrier (an unconditional shift + + byte store), which is why you asked for it and why it's the right call. +- **Where the barrier goes** — echojs makes this unusually clean because the + effect table already classifies every store as `E.WRITE` (`ops.ts:17`): + - **Runtime stores**: `_ejs_object_setprop` and the propertymap insert path + (`ejs-object.c`) — one barrier at the store point covers most object writes. + - **Compiler-inlined stores**: env-slot stores (`emit.ts:639`) and module-slot + stores (`emit.ts:600`) are raw `store`s with no runtime call — the emitter + must emit a card-dirty alongside each. These are the only inlined ejsval + stores, so the surface is small and enumerable. + - Array element stores go through `_ejs_object_setprop` today, so they're + covered by the runtime barrier until/unless arrays get a fast path. +- **Simplification for a single-threaded mutator**: the barrier is a plain + (non-atomic) card store — no CAS, no fences. This is a real, permanent win + from being single-threaded; keep it until/unless concurrency (#5) forces + atomics. + +### The root scan, reused verbatim + +Nothing about the conservative scan changes in structure. `mark_pointers_in_range` +/ `mark_ejsvals_in_range` (`ejs-gc.c:799-876`) already resolve an arbitrary word +to a heap cell and canonicalize interior pointers. Under the mover, resolving a +word to a block **pins that block** instead of graying a cell. The register +spill (`MARK_REGISTERS`) and stack range walk are unchanged. The precise root +set and module scan already produce exact `ejsval*` slots → those get +**rewritten** on evacuation (they're precise), while the stack/register scan +pins (it's ambiguous). This split — precise roots rewrite, ambiguous roots pin — +is the whole trick. + +## Object-model changes that would make GC easier + +Since you're not married to NaN-boxing, here's the menu — from "high leverage, +moderate cost" to "big swing" — with an eye to what each buys the *collector*. +The value-representation question is where the reference-type discussion from the +LLVM section lands. + +### Value representation + +- **Keep NaN-boxing.** Densest, fastest for float-heavy code, pointer inline. + Costs: opaque to LLVM's GC (previous section), and every mover must rewrite + inline pointers. Fully compatible with mostly-copying + stackmap-pinning + + shadow-stack relocation — i.e. you can keep it through Phases 0–6. +- **Tagged pointers (Smi-style): heap refs are real `ptr addrspace(1)`, small + ints/immediates are tag-bit non-pointers, doubles boxed (or a NaN-box side-path + for doubles only).** This is the change that makes ejsval a *uniformly + reference-typed* value and unlocks native LLVM statepoints — GC values become + honest pointers `RewriteStatepointsForGC` understands (mark the addrspace + *non-integral*, `ni:1`, so no int↔ptr optimization corrupts them). Cost: + doubles become heap objects, hurting numeric JS — the classic V8-Smi vs. + JSC-NaN-box trade. Worth it only if native statepoint relocation (destination + (iii)) is the goal. +- **Hybrid, oracle-driven.** NaN-box `any`/number values; carry + statically-proven references as addrspace(1) pointers. The per-value + representation split described in the LLVM section. Recovers float density on + the untyped paths while making the typed fraction natively relocatable. + +Recommendation: **don't change the value representation for the mostly-copying +collector — it doesn't need it.** Reach for tagged pointers or the hybrid only if +you decide precise *LLVM-relocatable* roots are worth the numeric-perf hit. That +decision can be deferred past Phases 0–4. + +### Object header → shapes / hidden classes (highest leverage — helps GC *and* speed) + +Today an `EJSObject` is `{ gc_header, ops, proto, map }` (`ejs-object.h:229-234`) +where `map` is a **malloc'd, out-of-line hash table** of `ejsval`s +(`_EJSPropertyMap`, `:128`). For the collector this is the worst shape: variable +indirection, *not* in the GC heap (so never compacted), scanned through a +function-pointer callback. For execution it's also worst-case: every property +access is a hash lookup and there are no inline caches. + +Replacing per-object hash maps with **hidden classes / shapes + inline slot +arrays** (V8/SpiderMonkey style) would, for the collector: +- make objects **fixed-size and trivially copyable** (shape id + contiguous slot + array), +- lay all ejsval slots **contiguous**, enabling **precise, branch-free tracing** + from a per-shape pointer-offset bitmap instead of a virtual `Scan` call, +- pull property storage **into the GC heap** so it compacts, +- and (the real prize) enable **inline caches** later — the thing that actually + moves echojs toward V8, which #7 otherwise can't reach. + +This dovetails with the maam type-oracle already planned: it computes *per +allocation-site layouts* (`result.layouts()` — field names, offsets, `TypeSig`s; +`docs/maam-plan.md`). That *is* a static shape assignment — objects can be born +with their hidden class instead of building a hash map dynamically. **This is the +single highest-leverage change in this document**: one move that is a GC change, +a speed change, and a type-system change at once. + +### Trace metadata in the header + +Independent of the above: replace `scan_type` bits + the virtual `Scan` op with a +**per-shape pointer-offset bitmap** referenced from the header. Tracing becomes +"for each set bit, follow this slot," no indirect call — faster mark/evacuate and +trivially moving-aware. The widened 64-bit header (Phase 1) has room for a +shape/trace-map index. + +### Closure-env slot addressing (kills the biggest pin source) + +The largest expected source of pinning is optimized code holding **raw interior +pointers into closure-env slots** with the env base dead (`emit.ts:624-641`; +interior-pointer handling at `ejs-gc.c:823-833`). Two ways to let envs move: +- have `env_load`/`env_store` recompute the slot address from a live base + + index at each use, rather than materializing and holding a raw `EjsValue*` + across a safepoint (an emitter change), or +- give envs a **Brooks-style forwarding word** (which a concurrent mover wants + anyway — see below) so an interior pointer can be relocated by following the + forward. +Either converts the env from "pins its block" to "relocatable," which is likely +the difference between a good and a bad pin rate. + +### Pretenuring from allocation-site lifetime + +The oracle (or simple runtime feedback) can mark allocation sites whose objects +reliably survive → **born directly in old gen**, skipping nursery churn. Small +change, pure win, needs the generational infra from Phase 3. + +## Concurrent collection (the collector on its own thread) + +You want the collector to run **concurrently with the mutator**. The mutator +stays single-threaded; the collector becomes the engine's second thread, so +mutator pauses shrink to brief handshakes. This is a first-class goal, and the +design below builds toward it from Phase 3 rather than bolting it on — chiefly by +choosing a write barrier now that a concurrent marker can reuse. + +### What "concurrent" requires, in order of difficulty + +1. **A collector thread + cooperative safepoints.** The mutator polls a safepoint + flag at allocation and at chosen back-edges/calls; the collector requests a + handshake for phase transitions and the root snapshot. With a *single* mutator + this is one handshake, not an N-thread stop-the-world protocol — dramatically + simpler than Go/JVM. The conservative (or stackmap) root scan happens during a + brief STW snapshot; everything else runs concurrently. + +2. **Concurrent marking with a snapshot-at-the-beginning (SATB) write barrier.** + While the collector marks, the mutator keeps mutating; to not lose objects the + barrier **logs the overwritten (old) value** of every ejsval store so the + collector still traces it. This is why Phase 3's generational card barrier + must *also* log old values: a card records *where* an old→young pointer is + (generational need); the logged old value feeds the SATB mark queue + (concurrent need). **One barrier, two consumers** — getting it right in Phase 3 + is what makes concurrency a later *addition* rather than a *rewrite*. + +3. **Concurrent sweeping / survivor evacuation** — two tiers: + - **Concurrent mark + brief STW evacuation (the sweet spot; target first).** + Marking is the long phase and runs off the mutator. In a mostly-copying heap + evacuation copies only the *unpinned survivors* — a small fraction — so the + STW compaction is short. This alone turns the pause from "proportional to + live set" into "proportional to survivors, determined concurrently." + SpiderMonkey and others lived here productively for years. Needs SATB + marking (2) + a STW root re-scan, nothing more exotic. + - **Fully concurrent evacuation (move while the mutator runs).** The hard tier: + the mutator may touch an object mid-copy. Needs a **load/read barrier** so + every ejsval load resolves through a forwarding pointer to the moved copy — + either a **Brooks forwarding word** in each object header (simple, + rep-agnostic, works with i64 NaN-boxing, costs a word + an indirection per + load; the widened header has room) or **ZGC-style colored pointers** (steal + bits for mark/remap state + a self-healing load barrier — tighter under + NaN-boxing since the tag bits are taken, though the 3 low alignment bits and + sub-2⁴⁷ high bits are available). Brooks is the pragmatic choice and composes + with the env-forwarding fix above. + +### The honest caveat: conservative/pinning roots vs. concurrent *moving* + +Concurrent *marking* pairs with any rooting scheme — pinned blocks simply get +marked in place. Concurrent *moving of stack-reachable objects* is the subtle +part: a conservatively-pinned (or stackmap-pinned, destination (i)) object can't +be relocated, which is *fine* — you concurrently evacuate the unpinned heap and +leave pinned blocks where they are; the load barrier resolves their identity +forward trivially. What you must not do is concurrently *move* an object named +only by a non-relocatable root. So: **concurrent marking works with everything; +concurrent moving of the heap interior works with everything; concurrent moving +of *stack-reachable* objects additionally needs relocatable roots (shadow stack +(ii) or statepoints (iii)).** Since the heap interior is the vast majority of +live data, the sweet-spot design (concurrent mark + STW survivor evacuation) +already gets you most of the pause win with plain conservative roots. + +### How this reorders the plan + +Concurrency changes *which barrier we build in Phase 3* and adds two later +phases, but does **not** touch Phases 0–2. Phase 3's barrier logs old values +(SATB-ready) from day one; a new **Phase 5** delivers concurrent marking + STW +survivor evacuation; **Phase 6** delivers fully concurrent evacuation via Brooks +forwarding + a load barrier. The single-mutator assumption is what makes all of +this materially easier than in a multi-threaded runtime and should be preserved +as long as possible — Web Workers, if they ever land, are what would force the +hard multi-mutator protocols. + +## Knobs (attribute 8) + +One primary knob: a **heap-growth target** — collect when live-set × (1 + g) is +reached, auto-tuning `g` from recent survival rates (Go's `GOGC` idea, but +self-adjusting rather than user-set). Derived automatically, not exposed: +nursery size (a small fixed multiple of the last minor survivor volume), old-gen +block size, card size, promotion age. Keep the existing `EJS_GC_*` env vars as +*debug* overrides only (`EJS_GC_DISABLE`, `EJS_GC_EVERY_N_ALLOC`, +`ejs-gc.c:708-711`). No generation-size tuning, no pause-time goals, no +survivor-ratio dials. If a knob can be derived from a measurement, derive it. + +## Phased plan (each phase lands green and shippable) + +The bias, as with the eir and maam plans, is toward small phases that each keep +the whole test suite passing and can be reverted independently. + +- **Phase 0 — Prerequisites & instrumentation.** Fix generator stack scanning + (`mark_generator_stacks` stub, `ejs-gc.c:1086`) so suspended generators pin + their referents — a correctness prerequisite for *any* mover, and a real bug + today. Add heap-audit instrumentation: object counts by kind/size, survival + rate per cycle, and a *pin-rate estimator* — walk the conservative roots and + report, **separately for young and old gen**, the *pinned bytes*, the *count of + blocks that would be retained* (contain ≥1 pinned cell and so can't be + bump-reset), and how many pins come from stack/register words vs. interior + env-slot pointers. **Gate: this breakdown in hand.** It decides whether + mostly-copying is worth it (low, clustered pins), whether the young-gen pin rate + alone justifies stackmap-precise nursery roots, and whether interior-pointer + ambiguity is pervasive enough that the env-slot fix or precise roots are + unavoidable. Measure before building. + +- **Phase 1 — Header widening & forwarding.** Widen `GCObjectHeader` to 64 bits + and land the coordinated struct/`lib/types.ts` layout change for `EJSObject` + (free), `EJSClosureEnv`, `EJSPrimString`. Add forwarding-pointer read/write + helpers and a `forward(obj)` that copies + stamps. No behavior change yet + (nothing moves); this is pure plumbing, verified by existing tests. **Gate: + green on all three bootstrap targets.** + +- **Phase 2 — Block-structured spaces + mostly-copying *major* collector.** + Relabel arenas/pages into nursery vs. old-gen blocks; add per-block metadata + (pin/age/mark). Replace mark-sweep with a mostly-copying full collector: + conservative roots pin blocks, precise edges evacuate. No generations yet — + every collection is a full compact. This is the riskiest phase; keep the old + collector behind a build flag for A/B and differential testing. **Gate: + identical program output vs. the mark-sweep collector across the whole test + suite + a stress mode that collects every N allocations; heap-shrink + demonstrated on a fragmenting benchmark.** + +- **Phase 3 — Generational: nursery + SATB-ready barrier.** Add the bump nursery, + route large allocations to old gen, add the card table and the store barrier + (runtime `_ejs_object_setprop` + the two inlined compiler store sites, + `emit.ts:600,639`). Minor collections evacuate nursery survivors using dirty + cards + roots. **Build the barrier to log old values from day one** (card + + old-value log), so concurrent SATB marking in Phase 5 is a consumer of an + existing barrier, not a rewrite — this is the load-bearing decision that makes + concurrency a first-class outcome. **Gate: minor-pause p99 sub-millisecond on + the benchmark corpus; allocation throughput ≥ current; barrier emits old-value + log; no regression in the `--types` diff lane.** + +- **Phase 4 — Tuning & knob elimination.** Auto-tune the growth target from + survival rates; derive nursery/block/card sizes; delete every tunable that can + be computed. **Gate: one documented knob; benchmarks within noise of the + hand-tuned Phase-3 configuration.** + +- **Phase 5 — Concurrent marking + STW survivor evacuation.** Introduce the + collector thread and single-mutator safepoint handshake; move the mark phase + off the mutator using the Phase-3 SATB log; keep a brief STW root snapshot and + a brief STW evacuation of unpinned survivors (small, because mostly-copying). + **Gate: mark runs concurrently; mutator STW time bounded and independent of + live-set size; output identical to Phase 4 under collection-stress.** + +- **Phase 6 — Fully concurrent evacuation.** Add a Brooks forwarding word + + load barrier so unpinned objects move while the mutator runs; stack-reachable + objects remain pinned unless (i)/(ii)/(iii) rooting has been adopted. **Gate: + major pause bounded independent of heap size on a large-heap benchmark.** An + optional cheaper predecessor — *incremental* (single-threaded, time-sliced) + old-gen marking — can bound major pauses without the collector thread if Phase + 5's threading proves troublesome; treat it as a fallback rung, not a + requirement. + +Phases 0–4 deliver attributes 1, 3, 4, 6 (minor), 8 and the achievable part of 7 +with no threads and no value-rep change. Phases 5–6 deliver attribute 5 and the +strong form of 6; they are planned for, not speculative, and their feasibility is +front-loaded by the Phase-3 barrier decision. + +## Risks, named + +- **Pin rate is the whole ballgame — and it bites the nursery first.** If + conservative roots pin many cells per cycle — plausible given the interior- + pointer env-slot pattern and heavy register spilling at `-O2` — you get + premature promotion and retained blocks, and the compaction win erodes. It's + worst in the young gen, where fresh objects are heavily stack/register- + referenced (see §"Pinning granularity"). Cell-granularity pinning bounds the + cost to pinned *bytes*, but the retained-block count still climbs with scatter. + Phase 0 measures both, per generation, *before* commitment. If the young-gen + rate is bad, the targeted fix is stackmap-precise *nursery* roots (destination + (i)); the broader fallback is making JS frames precise via compiler-emitted + spill-of-live-GC-values at `E.GC` safepoints (the effect table already marks + them, `ops.ts:15`), shrinking ambiguity to just the C runtime. Both are known + changes; keep them in the back pocket, don't lead with them. +- **The header widening is a coordinated cross-language change.** Runtime structs + and `lib/types.ts` must move together or compiled code reads objects at the + wrong offsets. Land it atomically (Phase 1) with the old collector still + active so it's independently verifiable. +- **Interior pointers into moved objects.** The conservative scan accepts + interior pointers (`ejs-gc.c:823-833`); a pinned block is fine, but we must + *never* evacuate an object that any ambiguous interior pointer targets. The + pin-the-block rule handles this only if block ownership is resolved from + interior pointers correctly — reuse `find_page_and_cell`'s existing interior + canonicalization (`:830`). +- **Objective-C compilation on macOS.** The new collector file compiles as ObjC + (`runtime/BUCK:118-127`); keep it clean C that survives `-x objective-c`. +- **`-O0` runtime vs `-O2` mutator asymmetry** already bites the register spill + (`ejs-gc.c:1016-1022`); the mover inherits every one of those assumptions. + Don't assume the compiler won't invent a pointer representation the scanner + hasn't seen — the differential stress mode in Phase 2 is the safety net. +- **This will not make echojs competitive with V8.** Worth repeating so the + effort is scoped right: the collector is not the bottleneck; property-map hash + lookups and the absence of inline caches are. A generational mover makes GC a + non-issue, which is the right and sufficient goal for *this* work. + +## Alternatives considered + +- **Keep conservative mark-sweep, add generations only (non-moving).** Cheapest; + gets you minor-pause wins and the card barrier without any moving or header + work. But no compaction → fragmentation persists, and you asked for moving. + Worth noting as the "half-measure" if Phase-2 risk proves unpalatable — Phases + 0, 3 (barrier), and a non-moving nursery are independently valuable. +- **Precise roots via LLVM `gc.statepoint` / a reference-typed ejsval, or precise + roots via stackmaps / a shadow stack.** All four are dissected in + §"The LLVM precise-root question": statepoints and a reference-typed ejsval are + gated on a value-rep change (they need real pointers); `llvm.experimental.stackmap` + gives fork-free precise *pinning* that lowers the pin rate under mostly-copying + and is the recommended precision upgrade; a manual shadow stack gives precise + *relocatable* roots while keeping NaN-boxing, at spill/reload cost, and is the + Phase-0-triggered fallback if the pin rate demands relocation of stack-reachable + objects. None is needed for the baseline collector. +- **A third-party collector (mmtk, Boehm generational, Immix as a library).** + mmtk is the serious option and its binding model fits an AOT runtime, but it + wants precise roots or careful conservative-root support and would still hit + the C-runtime rooting problem; adopting it is not obviously less work than the + staged plan above and forfeits the reuse of echojs's existing precise `Scan` + ops and conservative scanner. Revisit if the hand-rolled collector stalls. From 134ed67bb0dab2d9826f701db900717051071b73 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 22:22:49 -0700 Subject: [PATCH 093/146] gc-plan: rewrite as a compiler/runtime co-design The previous revision treated the repo state as fixed and designed a collector around tolerating it (conservative roots forever, pervasive pinning). Reframe: we own the emitter, so JS frames become precise and relocatable via emitter-owned gc-frame spill slots at E.GC safepoints; conservatism survives only in C runtime frames, where cell-granularity pinning on the mostly-copying substrate absorbs it. Other substantive changes: - inline bump-allocation fast path in emitted code (missing entirely from the old draft) - phases resequenced for payoff: generational nursery before the whole-heap mostly-copying major - shapes (maam P4) and the 64-bit GC header declared one design; barrier elision and pretenuring wired to the oracle - concurrent JS is a goal, not a cliff: Workers = isolates (per-heap single-mutator simplicity survives), shared structs = a contained shared space; now-rules (heap-context struct, context-accessor seam, atomics-friendly metadata, reserved back-edge polls) keep the eventual bill small - stale facts corrected: LLVM is 22.1.8 not "nominally 16"; runtime is built -O0 (defs.bzl) -- flagged as a Phase 0 experiment Co-Authored-By: Claude Fable 5 --- docs/gc-plan.md | 1350 +++++++++++++++++++++-------------------------- 1 file changed, 590 insertions(+), 760 deletions(-) diff --git a/docs/gc-plan.md b/docs/gc-plan.md index 9a0ef371..94e0b164 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -1,774 +1,604 @@ -# GC plan: from conservative mark-sweep to a moving generational collector - -A proposal for replacing echojs's stop-the-world conservative mark-and-sweep -collector (`runtime/ejs-gc.c`) with a generational, compacting, *mostly-copying* -collector — in independently-landable phases, each of which leaves the tree -green and shippable. - -This document is deliberately honest about which of the requested attributes are -reachable cheaply, which are reachable expensively, and which are in tension -with decisions already baked into the engine (chiefly NaN-boxing and a -`-O2`-compiled mutator with values living in registers). The headline: **you can -have moving + generational + low-pause without precise stack maps, and given -this codebase that is almost certainly the right trade.** The path that *sounds* -like what you asked for — "precise, via LLVM stackmaps" — is a dead end here for -a concrete reason the codebase already discovered, and I'll show why. +# GC plan: an industrial generational moving collector, co-designed with the compiler + +A plan for replacing echojs's stop-the-world conservative mark-and-sweep +collector (`runtime/ejs-gc.c`) with a generational, moving, eventually- +concurrent collector — in independently-landable phases, each of which leaves +the tree green and shippable. + +**The stance, up front.** An earlier revision of this document took the current +repo state — conservative stack scanning, runtime-call allocation, the hash-map +object model — as fixed, and designed a collector around *tolerating* it +(Bartlett mostly-copying with pervasive pinning). That got the substrate right +and the ambition wrong. The compiler is ours and is being actively rebuilt +(EIR, the optimizer, the maam type oracle); every allocation site, every store, +and every safepoint in compiled code is an EIR op we control, declared in the +effect table (`lib/eir/ops.ts`: `E.GC`, `E.WRITE`). A modern collector for this +engine is a **compiler/runtime co-design**: precise, relocatable roots in JS +frames because we emit them; inline allocation because we emit that too; +barriers the optimizer can elide; object layout designed once, jointly with the +maam shapes work. Conservatism survives only where it is genuinely stuck — the +hand-written C runtime — and the mostly-copying substrate exists to absorb +exactly that remainder, not to excuse imprecision everywhere. + +**Why now.** The compiler work is landing: EIR optimization (literal sinking, +IIFE inlining, env scalar replacement, DCE), typed guarded arithmetic (10.3× on +a numeric kernel, maam-plan P3), with specialization (P3.6) and shapes (P4) +queued. As mutator time falls, allocation and collection become the floor. The +goal of this plan is that **GC is never the reason echojs loses a benchmark**: +allocation as cheap as a bump-and-compare, minor pauses sub-millisecond, major +pauses bounded, and a design that scales with the object-model improvements +rather than fighting them. ## What we have today, as found -- **Collector** (`runtime/ejs-gc.c`, 1676 lines): stop-the-world, single-threaded - ("very simple stop the world collector", `ejs-gc.c:1123`), tri-color - mark-and-sweep, **non-moving**. Trigger is 60 MB of allocation since the last - cycle (`ejs-gc.c:1408`), plus `GC.collect()`, allocation-failure fallbacks, - and shutdown. +- **Collector** (`runtime/ejs-gc.c`, ~1700 lines): stop-the-world, + single-threaded, tri-color mark-and-sweep, non-moving. Trigger is 60 MB of + allocation since the last cycle (`ejs-gc.c:1408`), plus `GC.collect()`, + allocation-failure fallbacks, and shutdown. - **Allocator**: segregated free-lists in size classes 16–256 bytes over 32 MB - arenas, with a per-page bump pointer for fresh pages (`alloc_from_page`, - `ejs-gc.c:1305`) and a large-object store (LOS) for anything `> 256` bytes - (`alloc_from_los`, `ejs-gc.c:1352`). Mark bits are a per-cell bitmap in each - `PageInfo` (`ejs-gc.c:341`). -- **Heap is already precisely traceable.** Every object carries a per-class - `Scan` spec-op (`ejs-object.h:161,190`) and there are typed scanners for - strings, symbols, and closure environments (`_scan_from_ejsprimstr` etc., - `ejs-gc.c:755-789`). The collector already knows the exact outgoing edges of - every heap object. This is the single most important asset we have. -- **Roots are *not* precise.** Three sources: - 1. an explicit root set — a linked list of `ejsval*`, ~142 registrations, - almost all static global singletons (85 in `ejs-init.c` alone), plus 11 - genuinely dynamic ones in `ejs-promise.c:61-116` (`ejs-gc.c:188-193`, - `mark_from_roots` at `:960`); - 2. module exotics, scanned from a static array (`mark_from_modules`, `:988`); - 3. **a conservative scan of the C stack and spilled registers** - (`mark_thread_stack`, `:1060`; `MARK_REGISTERS`, `:1005-1058`), which reads - every stack/register word and treats anything that *looks* like a heap - pointer — tagged ejsval *or* raw untagged pointer, **including interior - pointers** — as a root. -- **Value representation**: SpiderMonkey-style NaN-boxing (`runtime/ejsval.h`). - A GC pointer lives *inline* in the low 47 bits of an 8-byte value - (`EJSVAL_TO_GCTHING_IMPL`, `ejsval.h:929`); all heap addresses are forced - below 2⁴⁷ (`mmap_boxable`, `ejs-gc.c:199`). -- **Compiler emits no GC support at all.** The eir backend (`lib/eir/emit.ts`) - keeps JS locals as pure SSA values in registers — "locals never touch memory" - (`emit.ts:9-11`); the only allocas are the outgoing-arg scratch area and a - `&this` slot. There are **no** statepoints, stackmaps, gcroots, safepoints, or - GC address-spaces. `lib/abi.ts:34-46` / `lib/compiler.ts:402-406` contain dead - `llvm.gcroot` code with a comment explaining why it was abandoned (below). -- **No write barriers anywhere** (`runtime/`, `lib/` — nothing). No card table, - no remembered set, no handle/`Rooted<>` abstraction. -- **Single-threaded.** No `pthread_create`, no workers, no TLS; the GC's - `LOCK_*` macros are all empty no-ops (`ejs-gc.c:100-105`). One event loop on - the main thread. -- **Build**: Buck2, Homebrew LLVM (nominally 16), runtime compiled `-O0`, user - JS compiled `-O2`. A new collector `.c` goes in `runtime/BUCK`'s - `shared_sources` (`:50-88`) and must compile as Objective-C on macOS. - -## Your eight attributes, scored honestly - -| # | Requested | Verdict | -|---|-----------|---------| -| 1 | Per-thread bump nursery; large → old gen | **Nursery: yes.** "Per-thread" is moot — the engine is single-threaded. Build a single-mutator bump nursery; route LOS-sized allocations straight to old gen. | -| 2 | Precise, via LLVM stackmaps | **Partly — and more hopefully than "no".** `gcroot`/`gc.statepoint` are out (they need reference-typed values; NaN-boxed ejsvals are `i64`). But `llvm.experimental.stackmap` records i64 locations and *does* work with NaN-boxing — fork-free precise **marking/pinning** roots, though not relocatable ones. Relocatable precise roots need either a value-rep change or a manual shadow stack. Full treatment in §"The LLVM precise-root question". | -| 3 | Fastest old→young write detection | **Yes: card marking + a generational store barrier.** Must be built from scratch and threaded through both the runtime stores and the compiler's store sites. The effect table already labels every store `E.WRITE` (`ops.ts:17`), which is where the barrier goes. | -| 4 | Moving | **Yes — via mostly-copying.** This is the core proposal. | -| 5 | Concurrent (collector runs alongside the mutator) | **First-class goal, staged.** The mutator stays single-threaded; the *collector* gets its own thread. Realistic first target: **concurrent marking** (SATB barrier) + a brief stop-the-world evacuation of survivors; then fully concurrent evacuation (forwarding/load barrier). A single mutator makes safepointing tractable. See §"Concurrent collection". | -| 6 | Extremely low pause | **Yes, via #5.** Generational alone makes minor pauses sub-millisecond (nursery + remembered set only). "Extremely low regardless of live set" comes from concurrent marking + concurrent evacuation — designed toward from Phase 3's barrier, not bolted on. | -| 7 | Competitive with V8 / SpiderMonkey | **Not gated by the collector.** echojs has no inline caches and uses per-object hash-map property stores (`_EJSPropertyMap`, `ejs-object.h:128`); it's AOT, not a JIT. GC is not its bottleneck and a great GC won't make it competitive. A generational mover *will* make allocation and collection cost competitive; the engine overall won't be. Said plainly so the effort is aimed right. | -| 8 | As few knobs as possible | **Yes, and easy to hold to.** One auto-tuned heap-growth target, no generation-size zoo. See §Knobs. | - -## The root problem: why conservative roots and moving are in tension - -A moving collector must find and *rewrite* every pointer to a moved object. The -heap edges we can already enumerate precisely. The **roots** we cannot, and here -is the bind: - -1. **NaN-boxing puts raw pointers inside `i64` values.** To use LLVM's precise - GC (`gcroot` / `gc.statepoint` + `RewriteStatepointsForGC`), a GC reference - must be a *reference-typed* SSA value (`ptr addrspace(1)`). An ejsval is an - `i64` that is *sometimes* a pointer and sometimes a double/int/bool. You - cannot hand LLVM an `i64` and ask it to relocate it. The codebase already hit - this wall — the `gcroot` call in `abi.ts:34-46` is commented out with exactly - this reasoning ("with the nan boxing we kinda lose out as the llvm IR code - doesn't permit non-reference types to be gc roots"). Using LLVM's machinery - would mean **un-NaN-boxing the value representation** — a change that touches - every file in `runtime/`, throws away the boxing's speed and density, and is - not on the table. - -2. **Even if JS frames were precise, the C runtime isn't.** Every - `EJS_NATIVE_FUNC` (`ejs.h:100`) holds bare `ejsval` locals across allocation - points — `Array.prototype.map` keeps `O`, `A`, `kValue`, … live across a loop - that allocates every iteration (`ejs-array.c:1171-1225`), and this pattern is - pervasive. There is no handle/`Rooted<>` scope anywhere (`§4` of the survey). - Making these precise means introducing a handle API and rewriting hundreds of - runtime functions to use it — the SpiderMonkey "exact rooting" migration, - which took Mozilla years. - -So precise rooting is not one project; it's two large ones (de-box the compiler -*and* handle-ize the runtime), and the first is foreclosed by NaN-boxing. - -**The resolution is to stop fighting it.** A collector can be moving *without* -precise roots if it can tolerate a set of ambiguous, un-rewritable references — -by refusing to move exactly the objects those references point at. That is -Bartlett's *mostly-copying* collector, and it is a near-perfect fit for an -engine that already does conservative scanning and already has precise heap -tracing. - -The rest of the "can't we just make roots precise?" question — including your -specific asks about bending `gcroot` and about typing ejsval as a reference — is -answered in full in the next section before we get to the collector proper. - -## The LLVM precise-root question, in full - -You asked whether we can bend `llvm.gcroot`, add our own mechanism without -forking LLVM, or type ejsval as a reference instead of an `i64`. Here is the -full lay of the land — more hopeful than the one-line "dead end", with two sharp -caveats. - -### How the machinery actually works (nothing moves on its own) - -Worth pinning down first, because it's the crux of the "why not just type it as a -reference?" question: **LLVM has no GC runtime, and address spaces are not regions -of your heap.** `addrspace(1)` is a compile-time *type tag* meaning "this pointer -is a GC-managed reference" (the address space `RewriteStatepointsForGC` treats as -GC is a convention, conventionally 1). It does not correspond to -from-space/to-space, nursery/old-gen, or any physical region — those are entirely -your runtime's concept, invisible to LLVM. Nothing is "automatically relocated -between spaces." - -All actual moving and pointer-rewriting is done by **your collector code**. -LLVM's whole contribution is at compile time, three things: -1. **identify** which live SSA values are GC references (by their `addrspace(1)` - type) at each safepoint; -2. **emit a stackmap** recording *where* each live reference sits (register or - stack slot) at that safepoint, into a section your runtime parses; -3. **insert `gc.relocate`** so that after a safepoint the compiled code re-reads - each GC pointer from its (possibly collector-updated) slot instead of reusing - a stale copy it was holding in a register. - -Runtime loop: mutator hits a safepoint → your collector walks the stackmap and, -per slot, reads the pointer, moves the object, writes the new address back → the -`gc.relocate`-lowered code reloads the updated pointer. Step 3 is the entire -reason statepoints exist and why "just scan the stack" can't *move*: without a -forced reload the compiler could keep a pre-move pointer in a callee-saved -register across the call, and your slot update would be silently ignored. - -So — *can't the collector just interrogate each value and skip the NaN-boxed -scalars?* On the read side, **yes**: the collector is your code and can decline to -move any slot. The breakage isn't there; it's the compile-time contract, next. - -### What LLVM offers, and why each does or doesn't fit an i64 ejsval - -**1. `llvm.gcroot` (classic shadow-stack intrinsic).** Signature is -`@llvm.gcroot(ptr %ptrloc, ptr %metadata)` where `%ptrloc` must be an *alloca of -pointer type*; a registered `GCStrategy` (e.g. `ShadowStackGC`) threads those -slots onto a list. It deals in **pointer-typed stack slots**. An ejsval is an -`i64` that is only *sometimes* a pointer; you can't hand `gcroot` an `i64` slot, -and bitcasting makes a boxed double's bits into a bogus "root." This is exactly -the wall the abandoned code in `lib/abi.ts:34-46` hit. Unusable as-is. - -**2. `llvm.experimental.gc.statepoint` + `gc.relocate` (the moving-GC path).** -GC references are `ptr addrspace(1)`; calls become statepoints; -`RewriteStatepointsForGC` inserts `gc.relocate` so every post-call use reloads -the possibly-moved pointer. The relocate is the crucial part — it's the *only* -thing in LLVM that makes moving-through-the-stack sound, because it forces the -reload. But GC values must be **real pointers**: incompatible with polymorphic -i64 ejsvals. - -**3. `llvm.experimental.stackmap` / `patchpoint` (the sleeper — works with -NaN-boxing).** `stackmap(i64 id, i32 shadow, ...live values...)` records the -**locations** (register or stack slot) of arbitrary-typed operands — **including -`i64`** — into an `__LLVM_StackMaps` section. So you list the live ejsvals at -each safepoint; the collector parses the map, reads each location, applies the -NaN-box tag test, and gets a **precise root set** with none of conservative -scanning's false positives (integers that look like pointers, dead slots, -interior-pointer ambiguity). No fork, no un-boxing. **The caveat:** a stackmap -*records* a location, it does not *relocate*. LLVM still treats the SSA value as -invariant — it may keep copies in other registers, rematerialize, or CSE it — so -overwriting the recorded slot is not guaranteed to be seen by every later use. -Hence stackmaps give precise **marking/pinning**, not general stack relocation. -(Closing that gap is exactly what statepoints are for.) - -**4. Custom `GCStrategy` + `GCMetadataPrinter` (fork-free extension points).** -You can register your own strategy and stackmap emitter in-tree, controlling -safepoint placement and map *format*. What this does **not** change is the type -discipline — a strategy still consumes `gcroot`/statepoint-shaped IR. Older LLVM -exposed `GCStrategy::performCustomLowering` to rewrite `gcroot`/`gcread`/`gcwrite` -yourself; it was deprecated/removed as statepoints took over and isn't a stable -base in LLVM 16. GCStrategy customizes *emission*, not *semantics*. - -**5. "Adding our own" mechanism.** A genuinely new *intrinsic* means editing -LLVM's tablegen — a fork; don't. The fork-free equivalent: mark safepoints with -a convention (a call to a known symbol, or `stackmap`) and run an **out-of-tree -LLVM pass** (loadable via the pass-plugin interface — no fork) that does the -lowering using the frontend's own liveness/type info to select the GC roots. -That pass can either emit `stackmap` intrinsics or spill live GC values into a -frame you control (a shadow stack). Both are fork-free and both work with i64. - -### Could ejsval be a *reference type* instead of an i64? - -Directly to your follow-up: **not uniformly, and not without changing how it's -used.** The subtlety is worth stating precisely, because it is *not* "LLVM will -relocate a double behind your back" — per the mechanics above, LLVM moves nothing -and your collector can inspect any slot and skip the scalars. The real -incompatibility is between two contracts on the same 64 bits: - -- **NaN-boxing needs an integer view.** Every tag test and every unbox of a - double/int32 is integer bit-twiddling on the value. -- **A `ptr addrspace(1)` value may only be touched as a relocatable pointer.** To - bit-twiddle it you must `ptrtoint`, and the integer you extract is invalidated - the instant a collection moves the object (its address changed; your captured - integer didn't). In a *non-integral* address space (`ni:` — the mode that - exists precisely for tagged/boxed pointers), `ptrtoint`/`inttoptr` aren't even - meaningful bit-preserving ops, so you can't NaN-box in it at all. Separately, - the optimizer may assume pointer semantics (e.g. two bitwise-equal addrspace(1) - values denote the same object) that NaN-boxed scalars violate. - -So a value can be *a thing LLVM relocates* **or** *a thing you NaN-box*, not both. -Soundness requires an invariant NaN-boxing violates: *every value of the -GC-reference type is actually a pointer, touched only as a pointer.* - -Three real options follow from that: - -- **Non-integral address space (`ni:`) — keeps the bits, doesn't buy moving.** - LLVM lets you mark an address space *non-integral* so the optimizer won't do - `inttoptr`/`ptrtoint` round-trips or assume the pointer's bits equal an integer - address (Julia carries GC refs this way). You *can* thus carry a tagged/boxed - value as a pointer type without the optimizer miscompiling it. But it does - **not** teach `RewriteStatepointsForGC` that some of those "pointers" are - really doubles — so it does not make the polymorphic case safe to relocate. It - helps only once references are already split out from immediates. - -- **Split the representation (tagged pointers) — the sound way to get a reference - type.** Make *references* (object/string/env) real `ptr addrspace(1)` values - and *immediates* (int31/bool/null/undefined) non-pointer, with doubles either - boxed or kept on a NaN-box side-path. Now the GC pointer type genuinely only - ever holds pointers, statepoints work, and you get LLVM-managed moving. This - **does** change "our use of it": doubles no longer share the pointer slot via - NaN tricks. It's the object-model change in §"Object-model changes" (value - representation), and it's the only way to a uniformly reference-typed ejsval. - -- **Type-split via the oracle (hybrid) — reference type where it's provably a - reference.** Where the maam type-oracle proves a value is an object/string/env, - represent *that value* as `ptr addrspace(1)` and let statepoints relocate it - precisely; where the type is `any` or number, keep the i64 NaN-box and - pin/shadow-stack it. ejsval stops being one uniform LLVM type and becomes - representation-selected per value — a bigger compiler change, but exactly what - the planned specialization work (maam-plan Phase 3.6) already sets up. This is - the most sophisticated end state and the one that most directly grants your - original "precise via LLVM" wish, for the typed fraction of the program. - -### The three fork-free destinations, ranked for echojs - -- **(i) Precise *pinning* roots via `stackmap` — recommended upgrade to - mostly-copying.** Keep NaN-boxing. The frontend (which already tags safepoints - via the `E.GC` effect, `ops.ts:15`) emits `llvm.experimental.stackmap` listing - live values; the collector reads exact roots and pins their blocks — strictly - fewer pinned blocks than conservative scanning, no C-runtime changes, no - un-boxing. Doesn't let stack-rooted objects *move*, but in mostly-copying they - don't need to. The natural precision upgrade if Phase-0 says conservative - pinning is too coarse. -- **(ii) Precise *relocatable* roots via a manual shadow stack — keeps - NaN-boxing, enables moving through the stack.** The frontend spills live - GC-typed ejsvals into an explicit per-frame struct (chained thread-wide) at - safepoints and reloads after. Because the values live in *memory you own*, the - collector rewrites them and the mutator reloads the moved pointer — relocation - without statepoints and without un-boxing. Cost: spill/reload at safepoints for - live GC values (gives up "locals never touch memory" *at safepoints only*), and - the C runtime needs handle scopes to participate or stays pinned. -- **(iii) Precise relocatable roots via native statepoints — needs the value-rep - split above.** Only reachable once GC references are real addrspace(1) - pointers. Then LLVM does the relocation bookkeeping, and it composes with the - oracle hybrid. - -The through-line: **you need neither a fork nor the end of NaN-boxing to get -*precise* roots — only to get *LLVM-managed relocatable* roots.** Precise pinning -(stackmaps) and precise relocation-via-shadow-stack are both fork-free and -NaN-box-compatible; native statepoint relocation is the only option gated on the -value representation. - -## The proposal: a mostly-copying generational collector - -### Core idea (Bartlett, 1988; generational variant Bartlett 1989) - -- Partition the heap into **pages/blocks** owned by a space (nursery, old gen). -- **Roots are still scanned conservatively** — C stack, spilled registers, - `-O2` JS frames, the existing root set, exactly as today. Each ambiguous root - that resolves into a heap block **promotes that block in place**: the block is - logically moved to to-space *without relocating its contents* ("pinned" this - cycle). This is cheap — it's a flag flip on the block, not a copy. -- Every **precisely-known** reference (heap-internal edges via the `Scan` ops, - and the precise root set) is **evacuated**: the target object is copied to a - fresh to-space block and a **forwarding pointer** is left behind; the - referring slot is rewritten to the new address. -- Because the heap is precisely traceable, all *heap→heap* edges get rewritten. - Because roots are conservative, all *root→heap* edges pin rather than move. - Both are sound; the only cost of conservatism is a little floating garbage and - some un-compacted (pinned) blocks per cycle. - -This gives you attributes **1, 3, 4, 6, 8** with **zero compiler root changes** -and **zero rewrite of the C runtime**. It degrades gracefully: in the worst case -(everything pinned) it's a non-moving mark-sweep, i.e. no worse than today. - -### Why it fits echojs specifically - -- The conservative scanner already exists and is battle-tested, including the - nasty parts — interior pointers into closure-env slots, raw unboxed pointers - in registers, callee-saved SIMD spills (`ejs-gc.c:823-833, 1016-1041`). We - *keep* all of it; it becomes the "block pinning" oracle instead of the "mark - everything" oracle. -- Precise heap tracing already exists (`Scan` ops). Evacuation reuses it almost - verbatim: where the mark phase today grays a target, the moving phase copies - it and updates the slot. -- The mutator is single-threaded, so there's no safepoint-coordination or - read-barrier problem for the moving itself — the world is already stopped - inside `_ejs_gc_alloc`. - -### Heap architecture + arenas, a per-page bump pointer for fresh pages, and a large-object store + (LOS) for anything larger. Every allocation — including from compiled JS — + is a call to `_ejs_gc_alloc(size, scan_type)` (`ejs-gc.h:33`). +- **The heap is already precisely traceable.** Every object carries a per-class + `Scan` spec-op (`ejs-object.h`) plus typed scanners for strings, symbols, and + closure environments. The collector knows the exact outgoing edges of every + heap object. This is the single most important asset we have. +- **Roots are not precise.** An explicit root list (~142 registrations, almost + all static singletons), module exotics, and **a conservative scan of the C + stack and spilled registers** (`mark_thread_stack`, `MARK_REGISTERS`) that + treats anything pointer-shaped — including interior pointers — as a root. +- **Generator stacks are not scanned at all** — `mark_generator_stacks` is a + stub (`ejs-gc.c:1087`). A latent correctness bug today; a hard blocker for + any mover. +- **Value representation**: SpiderMonkey-style NaN-boxing (`runtime/ejsval.h`); + GC pointers live in the low 47 bits of an 8-byte value, heap addresses forced + below 2⁴⁷. +- **Compiler emits no GC support.** The EIR backend (`lib/eir/emit.ts`) keeps + locals as pure SSA values — "locals never touch memory"; no statepoints, + stackmaps, or safepoint metadata. Notably, `env_load`/`env_store` each make a + runtime call to `_ejs_closureenv_get_slot_ref` and then load/store through + the returned raw `ejsval*` (`emit.ts:619-643`) — an interior pointer the + conservative scanner must honor, and a per-access call the mutator pays. +- **No write barriers anywhere.** No card table, no remembered set, no handle + abstraction in the C runtime. +- **Single-threaded.** One event loop, no workers, GC lock macros are no-ops. + Collections only happen inside `_ejs_gc_alloc`, i.e. under a runtime call. +- **Build**: Buck2, Homebrew LLVM **22.1.8**, runtime compiled **`-O0`** + (`defs.bzl:83`, inherited from the old config.mk), user JS compiled `-O2`. + New collector code goes in `runtime/BUCK` `shared_sources` and must survive + compilation as Objective-C on macOS. + +## Assets, liabilities, and the resulting shape + +Three assets determine the design: + +1. **Precise heap tracing already exists** (the `Scan` ops). Evacuation is + "copy + rewrite the slot" wherever marking today is "gray the target." +2. **The mutator is single-threaded — today.** Barriers need no atomics, + safepointing is one handshake, and a collector thread (later) coordinates + with exactly one partner. We exploit this deliberately — but **concurrent + JS is a stated goal** (Workers; the tc39 shared-memory work), so every + single-mutator shortcut is taken behind a seam with a documented exit path + (§"Concurrent JS"). The structural insight that keeps this cheap: the + platform's first concurrency step is *isolates* — N heaps, each with one + mutator — which preserves per-heap single-mutator simplicity; only + shared-memory objects ever put two mutators in one space. +3. **We own every emitted allocation, store, and safepoint.** The effect table + already classifies them (`E.GC`, `E.WRITE`). Anything the design needs from + compiled code — spill slots, barriers, inline allocation, liveness metadata + — is an emitter feature, not a research project. + +One liability: **root precision**, and it splits cleanly in two: + +- **JS frames** — ours to fix. The emitter will make them precise *and + relocatable* (see "Roots" below). This is the plan of record, not a fallback. +- **C runtime frames** — hundreds of `EJS_NATIVE_FUNC`s holding bare `ejsval` + locals across allocation points. Making these precise is the SpiderMonkey + exact-rooting migration (years). We don't do it: C frames stay conservatively + scanned, and objects they reference get **pinned** for the cycle. JSC ships + this way permanently; pinning C-frame referents is industrially respectable, + and every collection necessarily has some C frames live (the alloc slow path + is C), so the pin population never reaches zero anyway. What matters is that + it becomes *small and bounded* once JS frames are precise. + +The **mostly-copying substrate** (Bartlett) is what lets both root regimes +coexist in a moving collector: precise references are evacuated and rewritten; +ambiguous references pin their targets in place for the cycle. In the earlier +revision pinning had to absorb *all* stack roots; here it absorbs only the +C-runtime remainder — but the machinery is identical, and it means precision +work is an incremental improvement, never a flag-day prerequisite. + +NaN-boxing stays. It forecloses LLVM's native statepoint relocation (which +needs reference-typed values), but not precision — see below. The oracle-driven +hybrid representation (typed values as real `ptr addrspace(1)`, maam-plan +P3.6's typed calling convention taken further) remains the far-future path to +native statepoints for the typed fraction of the program; nothing in this plan +blocks it and nothing waits for it. + +## Target architecture ``` - ┌───────── nursery ─────────┐ ┌──────────── old gen ────────────┐ -alloc → │ bump pointer, one block │ │ block-structured, per-block │ - │ chain; small objs only │ │ pin/age/mark metadata; compacted │ - └───────────────────────────┘ │ by evacuation of unpinned blocks │ - └──────────────────────────────────┘ - ┌──── LOS ────┐ - size > threshold ───→ │ mmap'd, never moved, per-object header │ - └──────────────────────────────────────┘ + ┌────────── nursery ──────────┐ ┌─────────── old gen ───────────┐ + inline ──→ │ bump pointer, block chain; │ │ block-structured; evacuated/ │ + bump alloc │ evacuating minor GC; │ ─→ │ compacted per-block; pinned │ + in JS code │ pins at cell granularity │ │ cells swept in place │ + └─────────────────────────────┘ └───────────────────────────────┘ + ┌──── LOS ────┐ + size > threshold ──→ │ mmap'd, never moved │ + └─────────────────────┘ + + roots: JS frames — precise, relocatable (emitter-owned gc-frame slots) + C frames — conservative scan → cell-granularity pinning + barrier: card marks + SATB old-value log, one barrier, two consumers; + compiler elides barriers on initializing stores + later: concurrent marking on a collector thread; brief STW evacuation; + optionally fully concurrent evacuation (Brooks forwarding) + further: Workers = N isolates (one heap+mutator each, this design ×N); + tc39 shared structs = a contained shared space, atomic + protocols scoped to it alone ``` -- **Nursery**: a chain of blocks allocated by a single bump pointer - (generalizing the existing per-page `bump_ptr`, `ejs-gc.c:1317`). Fast path is - pointer-increment + limit-check, inlinable. Objects larger than a block - fraction, and all current LOS-sized objects, bypass the nursery and are born - in old gen / LOS (your attribute 1). -- **Minor collection** evacuates live nursery survivors into old-gen blocks, - using the **remembered set** (old→young pointers) plus the conservatively - scanned roots as its root set. Ambiguous roots pin at **cell** granularity (not - whole pages — see below); movable survivors, *including neighbors sharing a - block with a pinned cell*, are evacuated out; a block that contained no pins is - returned wholesale, and a block that contained one becomes an old-gen free-list - block holding just the pinned cell(s). -- **Major collection** traces the whole heap; unpinned old-gen blocks are - evacuated/compacted, pinned blocks are swept in place (mark-sweep fallback for - exactly the blocks conservatism forces). -- **Reuse the arena/block machinery** already in `ejs-gc.c` (`Arena`, `PageInfo`, - `alloc_page_from_arena`) — the space partitioning is a relabeling and a - metadata extension of what's there, not a from-scratch allocator. - -### Forwarding pointers and the object header - -`GCObjectHeader` is a bare `uint32_t` today (`ejs-types.h:30`): scan-type in the -low 16 bits, user flags in the high 16 (`ejs-gc.h:21-23`). A mover needs, per -object: a forwarded bit + a place to stash the forwarding address, plus (for -generational) an age and a card/log bit. - -- **Standard Cheney trick needs no extra space**: copy the object to to-space - *first*, then overwrite the from-space copy's first word with the forwarding - pointer (low bits are free — objects are 8-aligned) and a forwarded tag. The - original first word is already safely in to-space. So forwarding itself is - free. -- **Widen the header to 64 bits anyway**, for age/pin/mark/log bits and to keep - the mask bookkeeping sane. For `EJSObject` this is *free*: `gc_header` (4B) is - today followed by 4B of padding before the 8-byte `ops` pointer, so widening - to 8B leaves `ops` at offset 8 and **shifts no other field** — critically, - compiled code's view of object layout (`lib/types.ts`) is unchanged. For - `EJSClosureEnv` (`gc_header` then `uint32_t length`, `ejs-closureenv.h:9-13`) - and `EJSPrimString` (`gc_header`, `length`, `hash`, `ejs-string.h:77-95`) the - second word shifts; those two layouts and their compiler mirrors must move in - lockstep. This is mechanical but must be a single atomic change. - -### Pinning granularity, and the premature-promotion trap - -The obvious failure mode of mostly-copying: a single pinned object drags an -entire page. Classic Bartlett *does* pin at page granularity — it flips the -page's space id (a metadata operation, no copy — promotion is cheap; that is the -whole appeal) and leaves everything on the page in place, dragging live-but- -movable neighbors *and* short-lived garbage into the older generation. Freshly -allocated objects are the ones most likely to be live in registers / on the stack -at a collection, so this hits the **nursery hardest**, exactly where premature -promotion is most wasteful. - -echojs is not stuck with page granularity. The allocator is **segregated with -fixed per-page cell sizes**, and `find_page_and_cell` / `PTR_TO_CELL` -(`ejs-gc.c:78, 519-560`) already resolves any interior pointer to an exact cell. -So an ambiguous root can pin **the cell**, not the page: evacuate every movable -survivor (including neighbors of a pinned cell) out, leave only the pinned cells, -and convert the block to an old-gen free-list block whose other cells rejoin the -allocator (the current allocator is already free-list based). Pinning then costs -**pinned bytes**, not **blocks-touched × page-size**. - -Two residual costs remain and must be measured, not hand-waved: -1. **Pinned objects tenure early and don't compact** this cycle — wasteful if they - were about to die. -2. **Any block with ≥1 pinned cell can't be wholesale bump-reset**, so it leaves - the clean-nursery fast path; enough scattered pins and you accumulate - partially-full retained blocks. Track a *retained-block count*, not just a - pinned-byte count. - -This is the strongest argument for the stackmap-precision upgrade (destination -(i)), and a *targeted* one: precise roots matter most for the **young generation**, -because that's where conservative false-positives translate directly into -premature promotion. (Retaining a pinned block in the young gen and retrying next -cycle avoids early tenuring but forfeits the clean bump-reset and adds holey young -blocks — usually not worth it; promote-and-move-on is simpler and pinned objects -mostly would have survived the minor cycle anyway.) - -### Moving each object kind - -- **EJSObject**: copy the struct; the out-of-line `EJSPropertyMap` - (`ejs-object.h:128`) is malloc'd, *not* in the GC heap — leave it in place, it - moves with nobody. Its contained ejsvals are already visited by the object's - `Scan` op and get rewritten there. (Longer term the property map is a good - candidate to pull into the GC heap so it compacts too, but not required.) -- **EJSClosureEnv**: copy header + `length` + `slots[]`; rewrite each slot. - Watch the **interior-pointer** case — optimized code holds - `_ejs_closureenv_get_slot_ref` addresses (`emit.ts:624-641`) with the env base - dead. A raw interior pointer to a slot is an *ambiguous root* → it pins the - env's block. Correct and safe; costs a little compaction. (This is the single - biggest source of pinning and worth measuring early.) -- **Strings** (`ejs-string.h`): flat strings with an inline buffer copy fine; - flat strings with an **out-of-line** buffer (`EJS_PRIMSTR_HAS_OOL_BUFFER`) keep - the malloc'd buffer in place and just carry the pointer. Ropes and dependent - strings hold `EJSPrimString*` children — rewrite them like any other edge - (already enumerated by `_scan_from_ejsprimstr`, `ejs-gc.c:755`). -- **LOS**: never moved (as today). Ambiguous roots to LOS objects are a no-op - beyond marking. -- **Generators**: today their stacks are **not scanned at all** - (`mark_generator_stacks` is a stub, `ejs-gc.c:1086`) — a latent correctness - bug. A suspended generator frame holds live ejsvals; under a mover it must at - minimum pin whatever it references. This must be fixed *before* moving, or - generators will corrupt. Flagged as a Phase-0 prerequisite. - -### Write barriers and the remembered set - -Generational collection requires catching **old→young** stores so minor -collections can treat old-gen writers as roots without scanning all of old gen. - -- **Mechanism**: card marking. Divide old gen into cards (e.g. 512 B); a store - into an old-gen object dirties its card; minor collection scans only dirty - cards. Card marking is the cheapest known barrier (an unconditional shift + - byte store), which is why you asked for it and why it's the right call. -- **Where the barrier goes** — echojs makes this unusually clean because the - effect table already classifies every store as `E.WRITE` (`ops.ts:17`): - - **Runtime stores**: `_ejs_object_setprop` and the propertymap insert path - (`ejs-object.c`) — one barrier at the store point covers most object writes. - - **Compiler-inlined stores**: env-slot stores (`emit.ts:639`) and module-slot - stores (`emit.ts:600`) are raw `store`s with no runtime call — the emitter - must emit a card-dirty alongside each. These are the only inlined ejsval - stores, so the surface is small and enumerable. - - Array element stores go through `_ejs_object_setprop` today, so they're - covered by the runtime barrier until/unless arrays get a fast path. -- **Simplification for a single-threaded mutator**: the barrier is a plain - (non-atomic) card store — no CAS, no fences. This is a real, permanent win - from being single-threaded; keep it until/unless concurrency (#5) forces - atomics. - -### The root scan, reused verbatim - -Nothing about the conservative scan changes in structure. `mark_pointers_in_range` -/ `mark_ejsvals_in_range` (`ejs-gc.c:799-876`) already resolve an arbitrary word -to a heap cell and canonicalize interior pointers. Under the mover, resolving a -word to a block **pins that block** instead of graying a cell. The register -spill (`MARK_REGISTERS`) and stack range walk are unchanged. The precise root -set and module scan already produce exact `ejsval*` slots → those get -**rewritten** on evacuation (they're precise), while the stack/register scan -pins (it's ambiguous). This split — precise roots rewrite, ambiguous roots pin — -is the whole trick. - -## Object-model changes that would make GC easier - -Since you're not married to NaN-boxing, here's the menu — from "high leverage, -moderate cost" to "big swing" — with an eye to what each buys the *collector*. -The value-representation question is where the reference-type discussion from the -LLVM section lands. - -### Value representation - -- **Keep NaN-boxing.** Densest, fastest for float-heavy code, pointer inline. - Costs: opaque to LLVM's GC (previous section), and every mover must rewrite - inline pointers. Fully compatible with mostly-copying + stackmap-pinning + - shadow-stack relocation — i.e. you can keep it through Phases 0–6. -- **Tagged pointers (Smi-style): heap refs are real `ptr addrspace(1)`, small - ints/immediates are tag-bit non-pointers, doubles boxed (or a NaN-box side-path - for doubles only).** This is the change that makes ejsval a *uniformly - reference-typed* value and unlocks native LLVM statepoints — GC values become - honest pointers `RewriteStatepointsForGC` understands (mark the addrspace - *non-integral*, `ni:1`, so no int↔ptr optimization corrupts them). Cost: - doubles become heap objects, hurting numeric JS — the classic V8-Smi vs. - JSC-NaN-box trade. Worth it only if native statepoint relocation (destination - (iii)) is the goal. -- **Hybrid, oracle-driven.** NaN-box `any`/number values; carry - statically-proven references as addrspace(1) pointers. The per-value - representation split described in the LLVM section. Recovers float density on - the untyped paths while making the typed fraction natively relocatable. - -Recommendation: **don't change the value representation for the mostly-copying -collector — it doesn't need it.** Reach for tagged pointers or the hybrid only if -you decide precise *LLVM-relocatable* roots are worth the numeric-perf hit. That -decision can be deferred past Phases 0–4. - -### Object header → shapes / hidden classes (highest leverage — helps GC *and* speed) - -Today an `EJSObject` is `{ gc_header, ops, proto, map }` (`ejs-object.h:229-234`) -where `map` is a **malloc'd, out-of-line hash table** of `ejsval`s -(`_EJSPropertyMap`, `:128`). For the collector this is the worst shape: variable -indirection, *not* in the GC heap (so never compacted), scanned through a -function-pointer callback. For execution it's also worst-case: every property -access is a hash lookup and there are no inline caches. - -Replacing per-object hash maps with **hidden classes / shapes + inline slot -arrays** (V8/SpiderMonkey style) would, for the collector: -- make objects **fixed-size and trivially copyable** (shape id + contiguous slot - array), -- lay all ejsval slots **contiguous**, enabling **precise, branch-free tracing** - from a per-shape pointer-offset bitmap instead of a virtual `Scan` call, -- pull property storage **into the GC heap** so it compacts, -- and (the real prize) enable **inline caches** later — the thing that actually - moves echojs toward V8, which #7 otherwise can't reach. - -This dovetails with the maam type-oracle already planned: it computes *per -allocation-site layouts* (`result.layouts()` — field names, offsets, `TypeSig`s; -`docs/maam-plan.md`). That *is* a static shape assignment — objects can be born -with their hidden class instead of building a hash map dynamically. **This is the -single highest-leverage change in this document**: one move that is a GC change, -a speed change, and a type-system change at once. - -### Trace metadata in the header - -Independent of the above: replace `scan_type` bits + the virtual `Scan` op with a -**per-shape pointer-offset bitmap** referenced from the header. Tracing becomes -"for each set bit, follow this slot," no indirect call — faster mark/evacuate and -trivially moving-aware. The widened 64-bit header (Phase 1) has room for a -shape/trace-map index. - -### Closure-env slot addressing (kills the biggest pin source) - -The largest expected source of pinning is optimized code holding **raw interior -pointers into closure-env slots** with the env base dead (`emit.ts:624-641`; -interior-pointer handling at `ejs-gc.c:823-833`). Two ways to let envs move: -- have `env_load`/`env_store` recompute the slot address from a live base + - index at each use, rather than materializing and holding a raw `EjsValue*` - across a safepoint (an emitter change), or -- give envs a **Brooks-style forwarding word** (which a concurrent mover wants - anyway — see below) so an interior pointer can be relocated by following the - forward. -Either converts the env from "pins its block" to "relocatable," which is likely -the difference between a good and a bad pin rate. - -### Pretenuring from allocation-site lifetime - -The oracle (or simple runtime feedback) can mark allocation sites whose objects -reliably survive → **born directly in old gen**, skipping nursery churn. Small -change, pure win, needs the generational infra from Phase 3. - -## Concurrent collection (the collector on its own thread) - -You want the collector to run **concurrently with the mutator**. The mutator -stays single-threaded; the collector becomes the engine's second thread, so -mutator pauses shrink to brief handshakes. This is a first-class goal, and the -design below builds toward it from Phase 3 rather than bolting it on — chiefly by -choosing a write barrier now that a concurrent marker can reuse. - -### What "concurrent" requires, in order of difficulty - -1. **A collector thread + cooperative safepoints.** The mutator polls a safepoint - flag at allocation and at chosen back-edges/calls; the collector requests a - handshake for phase transitions and the root snapshot. With a *single* mutator - this is one handshake, not an N-thread stop-the-world protocol — dramatically - simpler than Go/JVM. The conservative (or stackmap) root scan happens during a - brief STW snapshot; everything else runs concurrently. - -2. **Concurrent marking with a snapshot-at-the-beginning (SATB) write barrier.** - While the collector marks, the mutator keeps mutating; to not lose objects the - barrier **logs the overwritten (old) value** of every ejsval store so the - collector still traces it. This is why Phase 3's generational card barrier - must *also* log old values: a card records *where* an old→young pointer is - (generational need); the logged old value feeds the SATB mark queue - (concurrent need). **One barrier, two consumers** — getting it right in Phase 3 - is what makes concurrency a later *addition* rather than a *rewrite*. - -3. **Concurrent sweeping / survivor evacuation** — two tiers: - - **Concurrent mark + brief STW evacuation (the sweet spot; target first).** - Marking is the long phase and runs off the mutator. In a mostly-copying heap - evacuation copies only the *unpinned survivors* — a small fraction — so the - STW compaction is short. This alone turns the pause from "proportional to - live set" into "proportional to survivors, determined concurrently." - SpiderMonkey and others lived here productively for years. Needs SATB - marking (2) + a STW root re-scan, nothing more exotic. - - **Fully concurrent evacuation (move while the mutator runs).** The hard tier: - the mutator may touch an object mid-copy. Needs a **load/read barrier** so - every ejsval load resolves through a forwarding pointer to the moved copy — - either a **Brooks forwarding word** in each object header (simple, - rep-agnostic, works with i64 NaN-boxing, costs a word + an indirection per - load; the widened header has room) or **ZGC-style colored pointers** (steal - bits for mark/remap state + a self-healing load barrier — tighter under - NaN-boxing since the tag bits are taken, though the 3 low alignment bits and - sub-2⁴⁷ high bits are available). Brooks is the pragmatic choice and composes - with the env-forwarding fix above. - -### The honest caveat: conservative/pinning roots vs. concurrent *moving* - -Concurrent *marking* pairs with any rooting scheme — pinned blocks simply get -marked in place. Concurrent *moving of stack-reachable objects* is the subtle -part: a conservatively-pinned (or stackmap-pinned, destination (i)) object can't -be relocated, which is *fine* — you concurrently evacuate the unpinned heap and -leave pinned blocks where they are; the load barrier resolves their identity -forward trivially. What you must not do is concurrently *move* an object named -only by a non-relocatable root. So: **concurrent marking works with everything; -concurrent moving of the heap interior works with everything; concurrent moving -of *stack-reachable* objects additionally needs relocatable roots (shadow stack -(ii) or statepoints (iii)).** Since the heap interior is the vast majority of -live data, the sweet-spot design (concurrent mark + STW survivor evacuation) -already gets you most of the pause win with plain conservative roots. - -### How this reorders the plan - -Concurrency changes *which barrier we build in Phase 3* and adds two later -phases, but does **not** touch Phases 0–2. Phase 3's barrier logs old values -(SATB-ready) from day one; a new **Phase 5** delivers concurrent marking + STW -survivor evacuation; **Phase 6** delivers fully concurrent evacuation via Brooks -forwarding + a load barrier. The single-mutator assumption is what makes all of -this materially easier than in a multi-threaded runtime and should be preserved -as long as possible — Web Workers, if they ever land, are what would force the -hard multi-mutator protocols. - -## Knobs (attribute 8) - -One primary knob: a **heap-growth target** — collect when live-set × (1 + g) is -reached, auto-tuning `g` from recent survival rates (Go's `GOGC` idea, but -self-adjusting rather than user-set). Derived automatically, not exposed: -nursery size (a small fixed multiple of the last minor survivor volume), old-gen -block size, card size, promotion age. Keep the existing `EJS_GC_*` env vars as -*debug* overrides only (`EJS_GC_DISABLE`, `EJS_GC_EVERY_N_ALLOC`, -`ejs-gc.c:708-711`). No generation-size tuning, no pause-time goals, no -survivor-ratio dials. If a knob can be derived from a measurement, derive it. - -## Phased plan (each phase lands green and shippable) - -The bias, as with the eir and maam plans, is toward small phases that each keep -the whole test suite passing and can be reverted independently. - -- **Phase 0 — Prerequisites & instrumentation.** Fix generator stack scanning - (`mark_generator_stacks` stub, `ejs-gc.c:1086`) so suspended generators pin - their referents — a correctness prerequisite for *any* mover, and a real bug - today. Add heap-audit instrumentation: object counts by kind/size, survival - rate per cycle, and a *pin-rate estimator* — walk the conservative roots and - report, **separately for young and old gen**, the *pinned bytes*, the *count of - blocks that would be retained* (contain ≥1 pinned cell and so can't be - bump-reset), and how many pins come from stack/register words vs. interior - env-slot pointers. **Gate: this breakdown in hand.** It decides whether - mostly-copying is worth it (low, clustered pins), whether the young-gen pin rate - alone justifies stackmap-precise nursery roots, and whether interior-pointer - ambiguity is pervasive enough that the env-slot fix or precise roots are - unavoidable. Measure before building. - -- **Phase 1 — Header widening & forwarding.** Widen `GCObjectHeader` to 64 bits - and land the coordinated struct/`lib/types.ts` layout change for `EJSObject` - (free), `EJSClosureEnv`, `EJSPrimString`. Add forwarding-pointer read/write - helpers and a `forward(obj)` that copies + stamps. No behavior change yet - (nothing moves); this is pure plumbing, verified by existing tests. **Gate: - green on all three bootstrap targets.** - -- **Phase 2 — Block-structured spaces + mostly-copying *major* collector.** - Relabel arenas/pages into nursery vs. old-gen blocks; add per-block metadata - (pin/age/mark). Replace mark-sweep with a mostly-copying full collector: - conservative roots pin blocks, precise edges evacuate. No generations yet — - every collection is a full compact. This is the riskiest phase; keep the old - collector behind a build flag for A/B and differential testing. **Gate: - identical program output vs. the mark-sweep collector across the whole test - suite + a stress mode that collects every N allocations; heap-shrink - demonstrated on a fragmenting benchmark.** - -- **Phase 3 — Generational: nursery + SATB-ready barrier.** Add the bump nursery, - route large allocations to old gen, add the card table and the store barrier - (runtime `_ejs_object_setprop` + the two inlined compiler store sites, - `emit.ts:600,639`). Minor collections evacuate nursery survivors using dirty - cards + roots. **Build the barrier to log old values from day one** (card + - old-value log), so concurrent SATB marking in Phase 5 is a consumer of an - existing barrier, not a rewrite — this is the load-bearing decision that makes - concurrency a first-class outcome. **Gate: minor-pause p99 sub-millisecond on - the benchmark corpus; allocation throughput ≥ current; barrier emits old-value - log; no regression in the `--types` diff lane.** - -- **Phase 4 — Tuning & knob elimination.** Auto-tune the growth target from - survival rates; derive nursery/block/card sizes; delete every tunable that can - be computed. **Gate: one documented knob; benchmarks within noise of the - hand-tuned Phase-3 configuration.** - -- **Phase 5 — Concurrent marking + STW survivor evacuation.** Introduce the - collector thread and single-mutator safepoint handshake; move the mark phase - off the mutator using the Phase-3 SATB log; keep a brief STW root snapshot and - a brief STW evacuation of unpinned survivors (small, because mostly-copying). - **Gate: mark runs concurrently; mutator STW time bounded and independent of - live-set size; output identical to Phase 4 under collection-stress.** - -- **Phase 6 — Fully concurrent evacuation.** Add a Brooks forwarding word + - load barrier so unpinned objects move while the mutator runs; stack-reachable - objects remain pinned unless (i)/(ii)/(iii) rooting has been adopted. **Gate: - major pause bounded independent of heap size on a large-heap benchmark.** An - optional cheaper predecessor — *incremental* (single-threaded, time-sliced) - old-gen marking — can bound major pauses without the collector thread if Phase - 5's threading proves troublesome; treat it as a fallback rung, not a - requirement. - -Phases 0–4 deliver attributes 1, 3, 4, 6 (minor), 8 and the achievable part of 7 -with no threads and no value-rep change. Phases 5–6 deliver attribute 5 and the -strong form of 6; they are planned for, not speculative, and their feasibility is -front-loaded by the Phase-3 barrier decision. +## Roots: precise, relocatable JS frames + +### What LLVM offers (condensed; the conclusions matter) + +- **`llvm.gcroot`** wants pointer-typed slots; an ejsval is an `i64` that is + only sometimes a pointer. Unusable — the abandoned experiment in + `lib/abi.ts:34-46` hit exactly this. +- **`gc.statepoint` + `RewriteStatepointsForGC`** relocates GC values LLVM can + *type* as GC pointers (`ptr addrspace(1)`). Incompatible with polymorphic + NaN-boxed i64s; reachable only after a value-representation split (the P3.6 + hybrid). Far future, not load-bearing. +- **`llvm.experimental.stackmap`** records the *locations* (register, stack + slot, or Direct alloca) of arbitrary-typed live values — including i64 — at + a given call site, into an `__LLVM_StackMaps` section keyed by return + address. It records; it does not relocate. + +### Plan of record: emitter-owned gc-frame slots + +The emitter gives each function a **gc-frame**: a contiguous alloca array of +ejsval slots. At every safepoint (every `E.GC`-effect op — all of which lower +to calls, including the inline-allocation slow path): + +1. every live GC-typed value is **stored** into a gc-frame slot before the + call, and +2. every use after the call reads the **reloaded** value — the emitter rewrites + the SSA uses, so no pre-safepoint copy survives the call. + +Because the roots now live in memory we own, the collector can *rewrite* them: +precise **and relocatable**, NaN-boxing intact, no LLVM fork. This is the +"shadow stack" idea, but built where it belongs — in our own emitter, on the +liveness information EIR already has. + +How the collector *finds* the frames, two variants, decided by measurement: + +- **Chained frames (start here).** Function prologue links its gc-frame record + (base, slot count) onto a thread-global chain; epilogue and unwind edges + unlink it. Simple, portable, no binary-format work. Costs a couple of stores + per function entry/exit — measurable, possibly ignorable, and functions the + optimizer proves allocation-free (no `E.GC` ops transitively) skip the frame + entirely. +- **Return-address-keyed maps (the zero-entry-cost upgrade).** Emit + `llvm.experimental.stackmap` at each safepoint listing the gc-frame slots; + the collector walks frame pointers and looks up return addresses in the + `__LLVM_StackMaps` section. No per-call chain maintenance; the stackmap + intrinsic serves purely as a *metadata emitter* while the slots themselves + make relocation sound. Requires a stack walker + section parsing (Mach-O and + ELF) and `-fno-omit-frame-pointer` discipline. + +Two sharp details, named now because they are the kind that silently corrupt: + +- **Store-to-load forwarding.** If LLVM can prove the safepoint call doesn't + touch the gc-frame, it will forward the pre-call store to the post-call load + and the collector's rewrite is lost. The gc-frame base must **escape** (the + chain registration does this naturally; under the stackmap variant, escape it + explicitly once per function). Verify with a stress test that moves *every* + object *every* collection. +- **Interior pointers must not be live across safepoints.** `env_load`/ + `env_store` currently materialize raw `ejsval*` slot refs via a runtime call. + The emitter should instead compute slot addresses inline (a GEP off the env + base) and **recompute per use** rather than caching across a safepoint — the + env base is then the only rooted value, and it relocates like any other. + Bonus, independent of GC: this deletes a runtime call from every env access, + a straight mutator win available today. + +The C runtime keeps the existing conservative scanner verbatim — stack ranges, +`MARK_REGISTERS`, interior-pointer canonicalization via `find_page_and_cell` — +but its hits **pin** rather than mark. No handle API, no rewrite of hundreds of +native functions. + +**Sequencing note.** The collector does not *wait* for precise JS frames: the +mostly-copying substrate runs with fully conservative roots on day one (that's +the earlier revision's design, still sound), and precision lands as a +pin-rate reduction. Phase 0 measures where the pins actually come from; if the +young-gen pin rate under conservative roots is already low, precision can slide +later in the sequence with no design change. + +## Allocation: inline the fast path + +Every allocation today is a full call into `-O0` runtime code. Industrial +engines allocate in ~4 inline instructions; so will we: + +``` +bump = *bump_ptr; new = bump + size; +if (new > *limit) goto slow; // slow: call _ejs_gc_alloc_slow → safepoint +*bump_ptr = new; // object header init follows inline +``` + +Single-threaded means the bump pointer is a plain global — no TLS. The +emitter stages this by allocation kind, payoff-ordered: + +1. **Closure environments** (`make_env`) — the most frequent allocation in + closure-heavy code, trivial to initialize inline (header + length), size + known at compile time. +2. **Object/array literals** (`make_object`/`make_array`) — worth inlining + once shapes land and initialization is "store shape id + slots" rather + than "build a hash map". +3. Strings/others stay runtime-side. + +The slow path is the safepoint; the fast path never GCs, which is what makes +"spill live values at safepoints only" cheap — straight-line allocating code +pays nothing. + +**Pretenuring**: the maam oracle (or cheap runtime feedback) tags allocation +sites whose objects reliably survive; those sites' inline sequence bumps an +old-gen block instead. Small change once the generational split exists. + +**Interplay with allocation sinking.** The optimizer is already removing +allocations (env scalar replacement landed; object/array sinking planned in +`docs/plans.md`). These compose — sinking removes allocations, the nursery +makes the survivors cheap — but they must be *measured together*: Phase 0's +allocation profiling runs with the optimizer on, so both efforts see the same +numbers and neither claims the other's wins. + +## Write barrier: one barrier, two consumers + +Generational collection needs old→young stores caught; concurrent marking +(later) needs overwritten values logged. Build one barrier that does both from +day one: + +- **Card marking** for location: old gen divided into ~512 B cards; a store + into old gen dirties the card (shift + byte store, unconditional, no + branches). Minor GC scans dirty cards only. +- **SATB old-value log** for the future concurrent marker: the barrier records + the overwritten ejsval into a sequential-store buffer. Dormant until Phase 6, + but designing it in now is what makes concurrency an *addition* rather than a + barrier rewrite. +- **Non-atomic everything** — single mutator. A plain store to the card byte, + a plain SSB append. Revisit only if Workers ever land. + +Where it goes — the store surface is small and enumerable: + +- **Runtime**: `_ejs_object_setprop` and the property-map insert path; one + barrier covers most object writes. +- **Emitted code**: `env_store` and `module_slot_store` are the only inline + ejsval stores (`emit.ts`); the emitter adds the card-dirty sequence there. + +And where it *doesn't* go — the compiler elides barriers it can prove dead: + +- **Initializing stores.** Stores that fill in a just-allocated object + (literal construction, `make_env` slot init) target an object that is + necessarily nursery-resident: no barrier. This is the majority of stores in + allocation-heavy code and the elision is purely local. +- **Provably-young targets.** The optimizer/oracle can extend "just allocated" + to "allocated in this function and not yet escaped/collected-across". +- **Non-reference stores.** Once typed slots exist (f64 slots in specialized + envs/shapes, post-P3.6/P4), stores of unboxed doubles need no barrier and no + trace entry at all. + +## Object header, forwarding, and shapes (joint design with maam P4) + +`GCObjectHeader` is a bare `uint32_t` (`ejs-types.h:30`). **Widen it to 64 +bits** with room for: forwarded bit + forwarding address (or the classic +first-word overwrite — objects are 8-aligned, low bits free), age, pin, mark, +card/log bits, and — the important part — a **shape/trace-map index**. + +Layout mechanics: for `EJSObject` the widening is free (4 B of padding already +follows the header before the `ops` pointer — compiled code's view via +`lib/types.ts` doesn't shift). `EJSClosureEnv` and `EJSPrimString` shift their +second word; runtime structs and `lib/types.ts` must move in **one atomic +change**, verified with the old collector still active. + +**The shapes tie-in is the single highest-leverage item in this document.** +maam-plan P4 designs shape-guarded property access from the oracle's +`layouts()` (per-allocation-site field names, offsets, type sigs). That design +and the GC's object layout are **one design, written once**: + +- objects become **shape id + contiguous inline slots** — fixed-size, trivially + copyable, no out-of-line malloc'd `_EJSPropertyMap` (which today never + compacts and is traced through a virtual call); +- tracing becomes a **per-shape pointer-offset bitmap** — branch-free, no + indirect `Scan` call, and exactly what a fast evacuation loop wants; +- objects are **born with their shape** at oracle-known allocation sites — no + dynamic hash-map buildup; +- property storage lives **in the GC heap** and compacts with everything else; +- and it is the doorstep to inline caches, which is where "competitive with + V8" actually gets decided. + +This plan's P1 header change reserves the bits; the shapes design doc (maam +P4) fills them in. The GC must not ship a header layout that shapes then has +to break. + +Per-kind moving notes: `EJSObject` copies as a struct (the property map, while +it still exists, is malloc'd and stays put); envs copy header+slots with each +slot rewritten; flat strings copy, out-of-line buffers stay put, ropes' +children are ordinary edges; LOS never moves; suspended generator stacks are +conservative root ranges (pin) once the Phase-0 bug fix lands. + +## Concurrency I: the collector on its own thread + +The mutator stays single-threaded (per isolate — see the next section); the +collector eventually gets its own thread, in two tiers: + +1. **Concurrent marking + brief STW evacuation — the sweet spot; target + first.** Marking (the long phase, proportional to live set) runs on the + collector thread, fed by the SATB log; a single-mutator handshake takes the + root snapshot; a short STW window evacuates unpinned survivors (small, + because generational). Pause becomes proportional to survivors, not live + set. SpiderMonkey lived here productively for years. +2. **Fully concurrent evacuation.** Objects move while the mutator runs; needs + a per-object forwarding word (Brooks — the widened header has room) and a + load barrier. Real cost per load; adopt only if tier 1's numbers demand it. + An *incremental* (time-sliced, same-thread) marker is the cheaper fallback + if the collector thread proves troublesome — a rung, not a requirement. + +Conservative/pinned roots compose fine with both tiers: pinned objects simply +don't move, and precise JS frames (relocatable) are what allow +stack-referenced objects to participate in evacuation at all. + +## Concurrency II: concurrent JS — Workers, shared memory, multiple mutators + +Concurrent JS is a goal, not a hazard: the web platform has Workers, and tc39 +is converging on safe shared-memory primitives (SharedArrayBuffer today; +shared structs / `Atomics` extensions in progress). The design must +accommodate multiple concurrent mutators *eventually* without paying for them +*now*. The platform's own staging makes that tractable, because each step +isolates a different cost: + +1. **Workers as isolates — N heaps, one mutator each.** The web's Worker model + shares nothing traced: `postMessage` copies, and a `SharedArrayBuffer` is + untraced off-heap memory (the GC only keeps the per-isolate wrapper object + alive — SAB support is *easy* and can come early). Under isolates, + everything in this plan holds per-heap unchanged: non-atomic barriers, + one-handshake safepoints, a lock-free bump nursery — each isolate has its + own. What isolates require is that collector state be **instantiable**: + `ejs-gc.c` today is a pile of file-static globals. New collector code puts + all state in a heap-context struct from day one, so "spin up a second + isolate" is plumbing, not a rewrite. + +2. **Compiled-code contact points go through a seam.** Emitted code touches + heap state at a handful of named points: bump/limit pointers, card-table + base, gc-frame chain head, (later) a safepoint-poll flag. The emitter + treats these as **context accessors** — today they resolve to plain + globals; under isolates they become TLS loads or a pinned context register. + Because echojs is AOT and statically linked, flipping the accessor + implementation is one emitter change plus a world recompile — there is no + deployed-binary ABI to preserve. The discipline that matters now is *not + scattering* heap-state contact through emitted code, so the flip never + grows a long tail. + +3. **Shared-memory objects are the real multi-mutator step — contained in a + shared space.** When shared structs (or an engine-level shared heap) land, + shared objects live in a distinct **shared space** with the expensive + protocols scoped to it alone: atomic card/SATB barriers on stores into + shared objects, CAS-installed forwarding if it ever moves (more likely: + non-moving initially), collection under a global rendezvous of all + isolates. The tc39 proposal's own containment rule — shared objects + reference only other shared data — is exactly what keeps this tractable: + isolate→shared edges are roots into the shared space; shared→isolate edges + don't exist by construction. Per-isolate nurseries and old gens keep their + cheap single-mutator protocols forever. + +4. **Safepoint reachability.** Allocation-slow-path safepoints suffice for one + mutator. A multi-isolate rendezvous needs every thread to reach a safepoint + promptly, including one spinning in a non-allocating loop — that means + emitter-inserted **back-edge polls** (a flag check; EIR knows its loop + back-edges). Not emitted today; reserved as a known emitter feature, and + the gc-frame design already gives polls a place to stand. + +What we do **now** (cheap, structural): +- no new file-static collector state — everything in the heap-context struct; +- heap-state access from emitted code only via the context-accessor seam; +- metadata designed atomics-friendly: side mark bitmaps that can be set with + an atomic OR, a forwarding word that can be CAS-installed, card/SATB buffers + that shard per-thread; +- no protocol that is correct *only* for one mutator by construction — the + single-mutator fast paths must be the degenerate case of a design that + admits N, not a different design. + +What we do **not** do now: no locks or atomics on any hot path, no shared +space, no rendezvous protocol. Those are paid when the platform work arrives, +and the seams above are what make the bill small. + +## Knobs + +One primary knob: a **heap-growth target** — collect when live × (1 + g) is +reached, `g` auto-tuned from recent survival rates. Nursery size, block size, +card size, promotion age: derived, not exposed. Existing `EJS_GC_*` env vars +survive as debug overrides only. If a knob can be derived from a measurement, +derive it. + +## Adjacent runtime work (same bottleneck, not this collector) + +Named here because "the runtime is about to be the bottleneck" is bigger than +GC, and these are cheap: + +- **The runtime is compiled `-O0`** (`defs.bzl:83`). Moving to `-O2` is likely + the single cheapest runtime speedup available and directly speeds the + collector itself. The conservative scanner's assumptions (register spills, + no hidden pointer representations) must be re-verified under `-O2` — do it + in Phase 0 while instrumentation is fresh. LTO across runtime/user-code is a + further step with the same caveat. +- **`env_load`/`env_store` runtime-call round-trip** — inline the slot address + computation (also required for precise roots; see above). Can land early and + alone. +- **Property access cost** (hash map, no ICs) — owned by shapes (maam P4), not + this plan; noted so nobody aims the GC at a mutator problem. + +## Phased plan + +Bias, as with the eir/maam plans: small phases, matrix green after each +(`//:test-eir`, `//:test-stage0..3`, the `--types` diff lane once relevant), +each independently revertable. The old collector stays behind a build flag +through Phase 3 for A/B and differential testing. + +- **Phase 0 — Correctness prerequisites + measurement.** Fix generator stack + scanning (`ejs-gc.c:1087` stub) — a real bug today, a corruption source under + any mover. Add instrumentation: allocation rate and size/kind profile (with + the optimizer on), survival rates, and a **pin-rate estimator** — walk + conservative roots and report pinned bytes, retained-block counts, and pin + *sources* (C stack vs. register spill vs. env interior pointers), separately + for what would be young vs. old. Run the `-O2`-runtime experiment and + re-verify scanner assumptions. **Gate: the numbers.** They size the payoff of + every later phase and decide how early precise JS frames need to land. + +- **Phase 1 — Header widening + forwarding plumbing.** 64-bit header, bits + reserved per the shapes tie-in; coordinated `runtime/` + `lib/types.ts` + layout change, landed atomically with the old collector active; forwarding + read/write helpers. No behavior change. **Gate: matrix green on all three + bootstrap targets.** + +- **Phase 2 — Generational nursery: the payoff phase.** Block-structured + spaces; all new collector state in an instantiable heap-context struct and + all emitted heap-state access through the context-accessor seam + (§"Concurrency II" — this is when the discipline starts, because this is + when the new code is written); bump-pointer nursery with the **inline + allocation fast path** for + `make_env` (objects follow later); card-table + SATB-logging store barrier + (runtime sites + the two emitted sites, with initializing-store elision); + **evacuating minor GC** on the mostly-copying substrate — precise heap edges + and root-list entries evacuate, conservative hits pin at cell granularity + (`find_page_and_cell` already canonicalizes interior pointers). Old gen + stays mark-sweep. **Gate: allocation throughput strictly better than the + free-list path; minor-pause p99 sub-millisecond on the benchmark corpus; + differential vs. old collector across the whole suite plus a + collect-every-N-allocations stress mode; pin-rate report from real runs.** + +- **Phase 3 — Precise JS-frame roots.** Emitter-owned gc-frame slots at `E.GC` + safepoints with SSA-use rewriting; chained-frame variant first; env slot + address inlining (interior pointers die); allocation-free functions carry no + frame. Nursery pins drop to C-frame-referenced objects only. **Gate: + move-everything stress mode green (catches store-forwarding bugs); pin rate + vs. Phase 2 recorded; mutator regression from spills measured and + acceptable; matrix green.** + +- **Phase 4 — Mostly-copying major collection.** Evacuate/compact unpinned + old-gen blocks; pinned cells swept in place; heap actually shrinks. This is + where fragmentation dies. **Gate: identical output vs. Phase 3 under stress; + demonstrated heap shrink on a fragmenting benchmark; auto-tuned growth + target replaces the 60 MB constant, knob census = 1.** + +- **Phase 5 — Shapes intersection (floats with maam P4).** When the shapes + design lands, the collector consumes it: per-shape trace bitmaps replace + `scan_type` + virtual `Scan`; inline-slot objects copy as memcpy + bitmap + walk; property storage moves into the GC heap; inline allocation extends to + object literals; typed slots get barrier/trace elision. Sequenced by + maam-plan; the GC-side work is deliberately small because P1 reserved the + header bits. + +- **Phase 6 — Concurrent marking + STW survivor evacuation.** Collector + thread, single-mutator handshake, SATB log becomes live. **Gate: marking off + the mutator; STW time independent of live-set size; stress-differential + green.** + +- **Phase 7 — Fully concurrent evacuation (optional).** Brooks forwarding + + load barrier, only if Phase 6's pause numbers say so. + +Phases 0–4 deliver the generational mover with no threads and no value-rep +change; 5 fuses the collector with the object-model future; 6–7 buy pause +bounds as needed. ## Risks, named -- **Pin rate is the whole ballgame — and it bites the nursery first.** If - conservative roots pin many cells per cycle — plausible given the interior- - pointer env-slot pattern and heavy register spilling at `-O2` — you get - premature promotion and retained blocks, and the compaction win erodes. It's - worst in the young gen, where fresh objects are heavily stack/register- - referenced (see §"Pinning granularity"). Cell-granularity pinning bounds the - cost to pinned *bytes*, but the retained-block count still climbs with scatter. - Phase 0 measures both, per generation, *before* commitment. If the young-gen - rate is bad, the targeted fix is stackmap-precise *nursery* roots (destination - (i)); the broader fallback is making JS frames precise via compiler-emitted - spill-of-live-GC-values at `E.GC` safepoints (the effect table already marks - them, `ops.ts:15`), shrinking ambiguity to just the C runtime. Both are known - changes; keep them in the back pocket, don't lead with them. -- **The header widening is a coordinated cross-language change.** Runtime structs - and `lib/types.ts` must move together or compiled code reads objects at the - wrong offsets. Land it atomically (Phase 1) with the old collector still - active so it's independently verifiable. -- **Interior pointers into moved objects.** The conservative scan accepts - interior pointers (`ejs-gc.c:823-833`); a pinned block is fine, but we must - *never* evacuate an object that any ambiguous interior pointer targets. The - pin-the-block rule handles this only if block ownership is resolved from - interior pointers correctly — reuse `find_page_and_cell`'s existing interior - canonicalization (`:830`). -- **Objective-C compilation on macOS.** The new collector file compiles as ObjC - (`runtime/BUCK:118-127`); keep it clean C that survives `-x objective-c`. -- **`-O0` runtime vs `-O2` mutator asymmetry** already bites the register spill - (`ejs-gc.c:1016-1022`); the mover inherits every one of those assumptions. - Don't assume the compiler won't invent a pointer representation the scanner - hasn't seen — the differential stress mode in Phase 2 is the safety net. -- **This will not make echojs competitive with V8.** Worth repeating so the - effort is scoped right: the collector is not the bottleneck; property-map hash - lookups and the absence of inline caches are. A generational mover makes GC a - non-issue, which is the right and sufficient goal for *this* work. +- **Pin rate before precision lands.** Phases 2 runs with conservative roots; + if the young-gen pin rate is high (plausible: env interior pointers, `-O2` + register pressure), premature promotion erodes the win until Phase 3. Phase + 0 measures this *first*; if it's bad, Phase 3 moves ahead of Phase 2's gate + being declared, or ships together with it. Cell-granularity pinning bounds + the damage to pinned bytes either way. +- **Store-to-load forwarding across safepoints** (Phase 3) — the silent- + corruption class. Mitigated by the escape discipline and killed dead by the + move-everything stress mode, which must exist before the first relocating + root does. +- **The header widening is a coordinated cross-language change.** Runtime + structs and `lib/types.ts` move together or compiled code reads garbage. + Atomic land, old collector active, all three bootstrap targets. +- **Spill overhead at safepoints** (Phase 3). Live-across-call values get + stores/reloads LLVM might otherwise have kept in callee-saved registers. + Expected small (safepoints are call sites; calls spill anyway); measured at + the Phase 3 gate, and allocation-free functions opt out entirely. +- **`-O2` runtime and scanner assumptions.** The conservative scanner was + hardened against `-O0`-runtime/`-O2`-mutator asymmetry; flipping the runtime + to `-O2` re-opens those assumptions. Phase 0 owns re-verifying them. +- **Objective-C compilation on macOS** — collector sources compile as ObjC in + `runtime/BUCK`; keep them clean C. +- **Single-mutator shortcuts leaking past their seams.** Non-atomic barriers, + the global bump pointer, and one-handshake safepoints are deliberate + exploitations of today's engine — but concurrent JS is a goal, so each must + stay behind the §"Concurrency II" seams (heap-context struct, context + accessors, atomics-friendly metadata). The cheap discipline is refusing new + file-static collector state; the expensive mistake would be a barrier or + forwarding protocol that is single-mutator-only *by construction*. ## Alternatives considered -- **Keep conservative mark-sweep, add generations only (non-moving).** Cheapest; - gets you minor-pause wins and the card barrier without any moving or header - work. But no compaction → fragmentation persists, and you asked for moving. - Worth noting as the "half-measure" if Phase-2 risk proves unpalatable — Phases - 0, 3 (barrier), and a non-moving nursery are independently valuable. -- **Precise roots via LLVM `gc.statepoint` / a reference-typed ejsval, or precise - roots via stackmaps / a shadow stack.** All four are dissected in - §"The LLVM precise-root question": statepoints and a reference-typed ejsval are - gated on a value-rep change (they need real pointers); `llvm.experimental.stackmap` - gives fork-free precise *pinning* that lowers the pin rate under mostly-copying - and is the recommended precision upgrade; a manual shadow stack gives precise - *relocatable* roots while keeping NaN-boxing, at spill/reload cost, and is the - Phase-0-triggered fallback if the pin rate demands relocation of stack-reachable - objects. None is needed for the baseline collector. -- **A third-party collector (mmtk, Boehm generational, Immix as a library).** - mmtk is the serious option and its binding model fits an AOT runtime, but it - wants precise roots or careful conservative-root support and would still hit - the C-runtime rooting problem; adopting it is not obviously less work than the - staged plan above and forfeits the reuse of echojs's existing precise `Scan` - ops and conservative scanner. Revisit if the hand-rolled collector stalls. +- **Keep mark-sweep, add a non-moving generational layer.** Cheaper, gets + minor-pause wins, no compaction ever — fragmentation and cache locality stay + bad, and the shapes future wants copyable objects. The Phase 2 substrate + costs only modestly more; not worth the dead end. +- **Full exact rooting including the C runtime (handles everywhere).** + The SpiderMonkey migration; years of churn across hundreds of native + functions for a pin population that pinning already bounds. No. +- **Native LLVM statepoints now.** Requires un-NaN-boxing or the P3.6 hybrid + value representation. The gc-frame design gets relocatable precision without + it; statepoints remain the far-future upgrade for typed values, and nothing + here blocks that. +- **MMTk (or another off-the-shelf collector).** The serious outside option; + its binding model fits AOT runtimes. But it wants exactly the root precision + and barrier plumbing this plan builds anyway, and adopting it forfeits reuse + of the existing precise `Scan` ops and battle-tested conservative scanner. + Reconsider if the hand-rolled collector stalls at Phase 4+; the compiler-side + work (roots, barriers, inline alloc) transfers either way. + +## Coordination with maam-plan / plans.md + +- **maam P3.6 (specialization)**: raw f64s in registers/typed signatures are + invisible to GC (not listed in gc-frames) — correct by construction. Typed + slots later enable barrier/trace elision. +- **maam P4 (shapes)**: joint design of header bits, trace bitmaps, inline + slots, born-with-shape allocation (this plan's Phase 5). The P4 design doc + should be written against the Phase 1 header layout. +- **Oracle pretenuring**: allocation-site lifetimes → old-gen birth; consumes + Phase 2 infrastructure. +- **plans.md escape analysis / allocation sinking**: measured jointly with + Phase 0's allocation profile; sinking shrinks nursery pressure, the nursery + cheapens what remains. +- **IR-in-manifest (cross-module)**: whole-program oracle facts strengthen + pretenuring and barrier elision; no GC dependency. + +## Phase checklist (for /goal sessions) + +- [ ] **P0** generator-stack fix; alloc/survival/pin instrumentation (optimizer + on); `-O2`-runtime experiment + scanner re-verification. + *Gate:* matrix green; numbers recorded in this doc or a results doc. +- [ ] **P1** 64-bit header (+ reserved shape/trace bits) + `lib/types.ts` + lockstep; forwarding helpers. + *Gate:* matrix green, all three bootstrap targets. +- [ ] **P2** nursery + inline `make_env` allocation + card/SATB barrier (with + initializing-store elision) + evacuating minor GC w/ cell pinning; old + collector behind a flag, differential + stress lanes; heap-context + struct + context-accessor seam from the first line of new code. + *Gate:* alloc throughput ↑; minor p99 < 1 ms; differential green; pin + report; zero new file-static collector state. +- [ ] **P3** gc-frame precise JS roots (chained variant) + env slot-address + inlining; move-everything stress mode. + *Gate:* stress green; pin-rate delta + spill-cost numbers recorded. +- [ ] **P4** mostly-copying major compaction + auto-tuned growth target. + *Gate:* heap shrink demonstrated; knob census = 1. +- [ ] **P5** shapes intersection (sequenced by maam P4): trace bitmaps, inline + slots, object-literal inline allocation, typed-slot elisions. +- [ ] **P6** collector thread: concurrent mark (SATB) + STW survivor + evacuation. + *Gate:* STW independent of live-set size. +- [ ] **P7** (optional) Brooks + load barrier for concurrent evacuation — + only on Phase 6 evidence. From 458a1fdfaea5d5762bf45cc7ea2f8e30066affe9 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 23:06:34 -0700 Subject: [PATCH 094/146] eir: Phase 3.4 -- dominated-guard elimination, region merging, raw f64 joins Two trust-free optimizer passes over the Phase 3 arithmetic diamonds (lib/eir/optimize-guards.ts); nothing consumes an oracle claim, so a wrong oracle still only costs speed. (a) Dominated-guard elimination + guard-region merging. A has_tag "number" cond_br folds to br when its value is proven: dominance facts (CHK dominator tree + the sole-pred-TRUE-successor condition -- entering that block is equivalent to the guard having held, and SSA number-ness is immutable) plus value-intrinsic proofs (const number, box_f64, and generic mul/div/sub results, which always return numbers in ES and in runtime/ejs-ops.c). Adjacent diamonds merge into one guard region with ONE slow path: the region shape is structurally verified (effect-free fast side, whitelisted add/sub/mul/div/lt slow chain), the previous region's slow exit is rerouted into the next slow chain (params substituted with the slow-side values), and later guard failures re-enter the merged slow path from the top -- proven pure and value-identical re-execution (operands guard-proven numbers) or the merge is refused. Values still live past the merged region are routed through the region exit as new params, with a dominance pre-check. Merging runs before folding: folding an adjacent diamond's guards first would dissolve its slow path and strand a mixed join mid-region. (b) Raw f64 block params for the joins the merge rewires. A param whose every incoming arg is a strippable box_f64 / f64 value / converted param (and which is rooted in a real f64 producer) becomes an f64 phi; boxes are stripped on the edges, unbox_f64 uses collapse to the param, and any remaining boxed use re-boxes exactly once at the region exit. This kills the bits_alloca round-trips between merged diamonds that the Phase 3 benchmark flagged. The verifier lift is scoped by an explicit rawJoin marker on the param (Inst.rawJoin, set only by this pass), and the marker is provenance rather than trust: the verifier independently re-checks type-f64 / all-args-f64 / non-catch / no-unwind-edge, rejects any f64 param WITHOUT the marker, and keeps i1 out of edges entirely -- every lowering-created edge stays under the strict Phase 2 boxed rule. emit.ts types marked params as double phis. hypot2 (the acceptance shape): three diamonds / six has_tags as lowered become one region -- one has_tag per distinct operand (2), one slow chain (mul/mul/add), the fast side unboxed end-to-end through phi-double joins, one box_f64 at the region exit. Gates (docs/maam-p0-results.md "Phase 3.4 gates"): tsc clean; //:test-eir 114 tests incl. merged/unboxed/negative shapes and the verifier triple; full matrix green on this code (test-eir, test-eir-lowtier, stage0..3, BUILD SUCCEEDED grep-verified; stage2=stage3 functional gate); --types diff lane 458 files / 457 identical / 0 divergent / diamonds 67 -- byte-identical to the Phase 3 baseline (lowering's diamond count is deliberately untouched), with both vacuous-pass guards re-verified to trip; all seven test/types probes match incl. the wrong-oracle keystone; types-bench1 median 0.31 s -> 0.23 s (10.3x -> 14.0x vs flag-off); hypot2 demo shape recorded in the regenerated before/after dump (diamonds=7 unchanged; wall time call-bound, unchanged). Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 125 ++++++ docs/maam-plan.md | 13 +- lib/eir/emit.ts | 5 +- lib/eir/integrate.ts | 10 +- lib/eir/ir.ts | 11 + lib/eir/optimize-guards.ts | 837 +++++++++++++++++++++++++++++++++++++ lib/eir/optimize.ts | 22 +- lib/eir/tests.ts | 182 ++++++++ lib/eir/verifier.ts | 55 ++- 9 files changed, 1248 insertions(+), 12 deletions(-) create mode 100644 lib/eir/optimize-guards.ts diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index d8b36396..61c99b59 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -378,3 +378,128 @@ degrade (widening, wrong oracle — both by design); the mechanism-level proof (//:test-eir-lowtier) is now backed by a magnitude measurement (10× on a pure-numeric kernel, a ceiling not a promise); matrix unaffected flag off. Phase 3 is complete pending sign-off. + +# Phase 3.4 gates (diamond pre-work) + +Date: 2026-07-22. echojs @ eir (this commit; passes in +lib/eir/optimize-guards.ts), maam @ 8d6a157. Same environment and +color-free protocol as the Phase 3 measurements. + +## The passes (what changed) + +Two trust-free optimizer passes over the Phase 3 diamonds — nothing here +consumes an oracle claim; every fact is proven from the IR, so a wrong +oracle still only costs speed: + +- **(a) dominated-guard elimination + guard-region merging.** Dominance + reasoning: the CHK dominator tree (shared with the verifier) plus the + sole-predecessor-TRUE-edge condition — entering such a successor is + equivalent to its guard having held, and SSA number-ness is immutable — + combined with value-intrinsic proofs (const number, box_f64, and + generic mul/div/sub results, which are always numbers in both ES and + runtime/ejs-ops.c). Region merging structurally VERIFIES (never + assumes) the diamond shape — effect-free fast side, whitelisted + {add,sub,mul,div,lt} slow chain — then fuses adjacent regions into one + guard region with ONE slow path (the full generic computation in + program order). Guard failures after partial fast execution re-enter + the slow chain from the top; the merge first proves that re-execution + is pure and value-identical (operands guard-proven numbers), else it + refuses. +- **(b) raw f64 block params for optimizer-rewired joins.** A param + whose every incoming argument is a strippable box_f64 / f64 value / + converted param becomes an f64 phi (double in the emitter), killing + the bits_alloca box/unbox round-trips between merged diamonds; any + remaining boxed use re-boxes exactly once at the region exit. The + verifier's P2 rule is lifted ONLY for params carrying the new + `rawJoin` marker, and the marker is provenance rather than trust: the + verifier independently re-checks type-f64, all-args-f64, non-catch, + no-unwind-edge — an f64 param WITHOUT the marker is rejected, so every + lowering-created edge keeps the strict boxed rule. + +hypot2 acceptance shape (see the regenerated +`~/src/echojs/hypot2-types-before-after.txt`): three diamonds / six +has_tags as lowered → ONE region with one has_tag per distinct value +(2), one slow chain (mul/mul/add), fast side unboxed end-to-end through +`phi double` joins, one box_f64 at the region exit. + +## The --types diff lane (behavioral gate) + +Clean re-assembled work tree, identical protocol: + +| files | identical | divergent | N/A | timeouts | +|---|---|---|---|---| +| 458 | 457 | **0** | 1 (tester.js, unchanged) | 0 | + +Aggregates: **diamonds 67**, oracleQueries 1319, oracleUnknown 1035 — +byte-for-byte the Phase 3 numbers. The lane counts LOWERING's diamonds +and the passes run post-hoc, so the count is unchanged by design; the +lane's expectations needed no touch. Both vacuous-pass guards +re-verified to trip: an empty work tree exits 1 ("zero files compared"), +and an outside-the-repo tree (dead oracle) exits 1 ("diamonds total is +0"). An additional superset run (467 files: the 458 plus probe/demo +copies) was also 0-divergent. + +## EIR-shape unit tests + +//:test-eir green, 114 tests, including the new Phase 3.4 shapes: +merged hypot2 (exactly 2 has_tags, a single guard-failure target, the +generic mul/mul/add surviving on the one slow path, box_f64 exactly +once, f64 rawJoin params on the intermediate joins); the bench-kernel +statement chain merging across pure const prefixes (six diamonds → 2 +has_tags, 1 slow path, 1 box); a negative shape (guards in an if-branch +do not dominate a later re-test: nothing folds, nothing merges, no raw +params); and the verifier triple (rawJoin accepted; f64 param without +the marker rejected; boxed arg into a rawJoin param rejected). + +## Microbenchmark (types-bench1, deltas vs Phase 3) + +Same kernel, same protocol (7× interleaved, /usr/bin/time -p): + +| build | P3 median | P3.4 median | note | +|---|---|---|---| +| flag-off | 3.19 s | 3.21 s | unchanged (five runs 3.17–3.37; two hit background-load noise at 4.96/5.70 — kept in, the median absorbs them) | +| --types | 0.31 s | **0.23 s** | −26% typed runtime | + +**Speedup 14.0× median (was 10.3×)**; diamonds=9, oracleUnknown=0, +output identical (13333303333341514000). Remaining headroom is the +region BOUNDARIES: loop-carried params and call arguments still box +(entry args are consts/params, not box_f64 — deliberately outside pass +(b)'s proof), which is P3.6's typed-calling-convention territory. + +## hypot2 demo (deltas vs Phase 3) + +diamonds=7 (unchanged — lowering's count). Wall time unchanged within +noise (flag-off 2.71/2.51/2.60 s, --types 0.51/0.34/0.35 s, ~7×): the +demo is dominated by the boxed call/closure/loop overhead around +hypot2, which P3.4 does not touch. What changed is the emitted shape — +2 NaN-box checks instead of 6, `phi double` fast pipeline, one generic +chain, one box — recorded with before/after EIR and LLVM excerpts in +the regenerated dump file. + +## test/types probes + +All seven probes still match (`node` diff / flag-off≡--types for the +wrong-oracle case), per-file diamond counts identical to the census +(6/4/5/0/6/9; wrongoracle lib=1). The wrong-oracle keystone still +routes the cross-module string through the guard to the slow path and +prints "x1" with identical flag-off/--types output. + +## Matrix + stage2 ≡ stage3 (flag off) + +Full serial matrix re-run on the final code: //:test-eir, +//:test-eir-lowtier, //:test-stage0..3 — six of six BUILD SUCCEEDED +(grep-verified in the buck logs, never tail exit). stage2 ≡ stage3 +functional gate (both stages compile and run the entire corpus with +per-test expected-output comparison) green. Flag-off the new passes +bail before touching anything: optimizeGuardRegions scans for number +guards and returns (none exist without --types), so flag-off output is +untouched by construction and the stage gates confirm it. + +## Reading + +Both P3.4 items hold with zero behavioral divergence: dominated guards +fold and adjacent diamonds merge into single-slow-path regions on real +dominance reasoning; the raw-f64-join lift is scoped by a +verifier-re-checked marker rather than a global weakening; the +microbenchmark ceiling moves 10.3× → 14.0×, and the remaining box/unbox +traffic sits exactly where P3.6 (typed calling convention) picks up. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 3f2f3270..e5339898 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -479,13 +479,20 @@ Smaller forward items surfaced by the Chunk A integration review: green. Numbers in docs/maam-p0-results.md "Phase 3 gates". The lane script fails on zero-files-compared and zero-diamonds (vacuous-pass guards from review). -- [ ] **P3.4** diamond pre-work, trust-free (see the Phase 3.4 section): +- [x] **P3.4** diamond pre-work, trust-free (see the Phase 3.4 section): dominated-guard elimination + f64 block params for - optimizer-created joins. + optimizer-created joins. Landed as lib/eir/optimize-guards.ts: + proven-number guard folding (dominator-tree facts + value-intrinsic + proofs), structural guard-region merging (hypot2's three diamonds → + one region, one slow path), and rawJoin f64 params — an explicit + per-param marker the verifier re-checks in full (f64 params REQUIRE + it; every incoming arg must be f64; catch/unwind excluded), so + lowering-created edges keep the strict P2 boxed rule. *Gate:* matrix green; --types diff lane still byte-identical; EIR-shape unit tests (merged guard region; unboxed fast region boxing once); types-bench1 + the hypot2 demo re-measured, deltas - vs the Phase 3 baselines recorded. + vs the Phase 3 baselines recorded in docs/maam-p0-results.md + "Phase 3.4 gates". - [ ] **P3.5** differential harness in maam repo (`concreteEval` vs node vs ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 0d4b325a..ae98a477 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -225,7 +225,10 @@ export class EIREmitter { ir.setInsertPoint(this.blocks.get(b)!); for (let p of b.params) { if (p.isException) continue; // materialized by the landingpad below - let phi = ir.createPhi(types.EjsValue, b.predEdges.length, `p_${p.id}`); + // rawJoin params (Phase 3.4 pass (b)) carry raw doubles; + // everything else is an EjsValue phi (the P2 boxed rule) + let phi_type = p.type === "f64" ? types.Double : types.EjsValue; + let phi = ir.createPhi(phi_type, b.predEdges.length, `p_${p.id}`); this.phis.set(p, phi); this.values.set(p, phi); } diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 0ad974b0..e80003a9 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -428,14 +428,20 @@ export function collectEIRToplevel( stats.reads_folded || stats.calls_inlined || stats.iters_folded || - stats.dead_removed + stats.dead_removed || + stats.guards_folded || + stats.regions_merged || + stats.raw_join_params ) debug.log( 1, `EIR-opt: ${filename}: ${stats.calls_inlined} call(s) inlined, ` + `${stats.allocs_sunk} alloc(s) sunk, ${stats.reads_folded} read(s) folded, ` + `${stats.iters_folded} iterator walk(s) folded, ` + - `${stats.dead_removed} dead inst(s) removed` + `${stats.dead_removed} dead inst(s) removed, ` + + `${stats.guards_folded} guard(s) folded, ` + + `${stats.regions_merged} region(s) merged, ` + + `${stats.raw_join_params} raw f64 join param(s)` ); verifyModule(eir_module); if (dumpOptRequested(options)) dumpModule(filename, "optimized", eir_module); diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts index 0ded3a85..f3e544dd 100644 --- a/lib/eir/ir.ts +++ b/lib/eir/ir.ts @@ -177,6 +177,17 @@ export class Inst { // catch blocks' first param is the caught exception isException = false; removed = false; + // Phase 3.4 pass (b): a block parameter that carries a RAW f64 across + // its incoming edges — the controlled lift of the Phase 2 + // raw-values-cannot-cross-blocks rule. Set ONLY by the optimizer's + // guard-region merge (optimize-guards.ts) on joins it builds/rewires; + // lowering must never set it, so every lowering-created edge keeps + // the strict boxed rule. The marker is not trusted on its own: the + // verifier independently checks the full safety conditions (type is + // f64, every incoming argument is f64, non-catch block, no unwind + // edges), so a stray marker can only ever *tighten* checking, never + // admit an ill-typed edge. The emitter types the phi as double. + rawJoin = false; constructor(fn: Func, op: string, operands?: Inst[], imms?: Imms) { this.id = fn.newValueId(); diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts new file mode 100644 index 00000000..8c8c6add --- /dev/null +++ b/lib/eir/optimize-guards.ts @@ -0,0 +1,837 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Phase 3.4: trust-free optimizer passes over the Phase 3 guarded +// arithmetic diamonds (lower.ts numericDiamond). +// +// (a) dominated-guard elimination + guard-region merging: a has_tag +// "number" test on a value already proven number is folded, and +// adjacent diamonds fuse into one guard region with one fast side +// and ONE slow path; +// (b) raw f64 block params for the joins the merge rewires, so the +// merged fast side computes unboxed end-to-end and boxes exactly +// once at the region exit. +// +// Both passes are trust-free: nothing here consumes an oracle claim. +// Every fact is proven from the IR itself, so a wrong oracle upstream +// still only costs speed, never correctness. +// +// ---- Soundness inventory (each rewrite's argument, in one place) ---- +// +// Proven-number facts (provenNumberAt): +// - const kind="number" and box_f64 results are numbers by +// construction. +// - results of the generic ops mul / div / sub are ALWAYS numbers: +// ES semantics (`* / -` apply ToNumber and produce a Number; they +// throw rather than return anything else) and the echojs runtime +// agrees (runtime/ejs-ops.c _ejs_op_{mult,div,sub} only ever return +// NUMBER_TO_EJSVAL(..)). `add` is excluded (string concatenation) +// unless both its operands are proven numbers. +// - a block param is a number if every incoming edge argument is +// proven (each argument's proof holds at the query block too — +// number-ness of an immutable SSA value is position-independent +// once every path establishes it; self-edges are vacuous). +// - dominance facts: if block T is the sole-predecessor TRUE successor +// of `cond_br (has_tag %v "number")` and T dominates B, then every +// path to B passed the guard while it was true; SSA values are +// immutable, so %v is a number at B. This is the "real dominance +// reasoning": the CHK dominator tree (verifier.ts) plus the +// sole-pred-true-edge condition, which is exactly what makes +// entering T equivalent to the guard having held. +// +// Guard folding: a cond_br on a proven has_tag rewrites to br to the +// true target. Removing CFG edges only grows dominance, so folding +// with a momentarily-stale dominator tree is conservative. +// +// Region merging (the diamond CFG's structural argument): a region is +// verified — never assumed — to have the shape +// head: ... cond_br (has_tag) -> fast..., slow +// fast side: blocks whose instructions are all effect-free (at most +// GC), terminated by br / interior number guards (false edges +// all to the region's slow entry) / i1 cond_brs, exiting to the +// join; +// slow side: a linear chain of blocks holding only the whitelisted +// generic ops {add,sub,mul,div,lt} (plus effect-free +// instructions and br), exiting to the same join. +// Merging region R1 with the region R2 headed at R1's join J1: +// - R1's slow exit is retargeted from J1 straight into R2's slow +// entry, and J1's params are substituted with the values that edge +// carried wherever R2's slow chain used them: the slow path becomes +// the full generic computation in original program order (identical +// semantics — the generic ops ARE the JS semantics regardless of +// operand types). A previously slow-then-fast mixed execution now +// runs fully generic: same observable behavior, only slower — the +// documented cost model of guard regions. +// - R2's guard-failure edges are retargeted from R2's slow entry to +// R1's slow entry (the merged region's single slow path). Those +// failures happen only after R1's guards all passed and R1's fast +// side (effect-free by the region check) ran, so the R1 portion of +// the slow chain RE-executes. That is sound because the merge +// first proves every instruction in R1's slow chain is either +// effect-free or a whitelisted generic op whose operands are proven +// numbers at R1's fast exits: a generic op on numbers is pure, non- +// throwing (its unwind edge stays untaken), and returns bit-for-bit +// the f64 result the fast side already computed. +// - values defined at J1 (params + the pure instruction prefix ahead +// of R2's guard) that are still used beyond R2 are routed through +// R2's join as new params — fast edges pass the J1 value, the slow +// edge passes its slow-side substitute — after checking that every +// such use IS dominated by that join (else the merge is refused). +// +// Raw f64 joins (pass b): a param is converted only when every incoming +// argument is a box_f64 result (whose only consumers are edges feeding +// converted params), an f64 value, or another converted param. The +// boxes are stripped on the edges, unbox_f64 uses collapse to the param +// itself, and any remaining boxed use re-boxes ONCE at the head of the +// param's block — that is the single box at the region exit. The +// verifier re-checks all of it (see verifier.ts rawJoin rules). + +import { Func, Block, Inst } from "./ir"; +import type { Target } from "./ir"; +import { Effect, opInfo } from "./ops"; +import { computeRPO, computeDominators, dominates } from "./verifier"; +import type { OptStats } from "./optimize"; + +// generic ops that (1) lowering pairs with f64 fast ops, and (2) are +// pure and value-identical to the f64 op when both operands are numbers +// (see the soundness inventory above) +const SLOW_OPS = new Set(["add", "sub", "mul", "div", "lt"]); + +// generic ops whose RESULT is always a number (ES + runtime/ejs-ops.c) +const NUMBER_RESULT_OPS = new Set(["mul", "div", "sub"]); + +function isNumberGuard(inst: Inst): boolean { + return inst.op === "has_tag" && inst.imms["tag"] === "number"; +} + +// --- CFG edge surgery ------------------------------------------------------- + +function removePredEdge(block: Block, inst: Inst, targetIndex: number): void { + block.predEdges = block.predEdges.filter( + (e) => !(e.inst === inst && e.targetIndex === targetIndex) + ); +} + +// point inst.targets[targetIndex] at a new block, maintaining predEdges +function retargetEdge(inst: Inst, targetIndex: number, newBlock: Block, newArgs: Inst[]): void { + const t = inst.targets![targetIndex]!; + removePredEdge(t.block, inst, targetIndex); + t.block = newBlock; + t.args = newArgs; + newBlock.predEdges.push({ inst: inst, targetIndex: targetIndex }); +} + +// replace a block's cond_br terminator with an unconditional br to +// targets[keepIndex] (edge args preserved); the condition goes dead and +// DCE sweeps it later +function condBrToBr(fn: Func, block: Block, keepIndex: number): void { + const cbr = block.terminator!; + const keep = cbr.targets![keepIndex]!; + removePredEdge(keep.block, cbr, keepIndex); + removePredEdge(cbr.targets![1 - keepIndex]!.block, cbr, 1 - keepIndex); + block.insts.pop(); + cbr.block = null; + const br = new Inst(fn, "br", [], {}); + br.block = block; + block.insts.push(br); + br.addTarget(keep.block, keep.args.slice()); +} + +// drop blocks no longer reachable from entry and rebuild predEdges so +// no stale edges (from deleted blocks) survive +function sweepUnreachableBlocks(fn: Func): boolean { + const reachable = new Set([fn.entry!]); + const stack: Block[] = [fn.entry!]; + while (stack.length > 0) { + const b = stack.pop()!; + for (const s of b.succs()) { + if (!reachable.has(s)) { + reachable.add(s); + stack.push(s); + } + } + } + if (reachable.size === fn.blocks.length) return false; + fn.blocks = fn.blocks.filter((b) => reachable.has(b)); + for (const b of fn.blocks) b.predEdges = []; + for (const b of fn.blocks) { + const t = b.terminator; + if (!t || !t.targets) continue; + t.targets.forEach((tg, i) => tg.block.predEdges.push({ inst: t, targetIndex: i })); + } + return true; +} + +// --- proven-number reasoning ------------------------------------------------ + +// the value proven number on entry to `b` by b being the sole-pred TRUE +// successor of a number guard (see the soundness inventory) +function blockEntryFact(b: Block): Inst | null { + if (b.predEdges.length !== 1) return null; + const e = b.predEdges[0]!; + if (e.targetIndex !== 0) return null; + if (e.inst.op !== "cond_br") return null; + const cond = e.inst.operands[0]!; + if (!isNumberGuard(cond)) return null; + return cond.operands[0]!; +} + +// a dominance fact: some number guard on v has a sole-pred TRUE +// successor dominating `block`, so every path to `block` proved v +function guardFactAt(v: Inst, block: Block, idom: Map): boolean { + let b: Block = block; + for (;;) { + if (blockEntryFact(b) === v) return true; + const n = idom.get(b); + if (!n || n === b) return false; + b = n; + } +} + +// is v proven number at `block`? Combines value-intrinsic proofs +// (const/box_f64/mul/div/sub, position-independent) with dominance +// facts. Facts are sound inside the recursion too: an SSA value's +// number-ness is immutable, so "every path to `block` passed a guard on +// x" proves x is a number at `block` no matter where x sits in a +// compound proof (an add's operand, a param's incoming argument). +// depth-capped so param cycles terminate. +function provenNumberAt( + v: Inst, + block: Block, + idom: Map, + depth: number = 6 +): boolean { + if (v.op === "const") return v.imms["kind"] === "number"; + if (v.op === "box_f64") return true; + if (NUMBER_RESULT_OPS.has(v.op)) return true; + if (guardFactAt(v, block, idom)) return true; + if (depth <= 0) return false; + if (v.op === "add") + return ( + provenNumberAt(v.operands[0]!, block, idom, depth - 1) && + provenNumberAt(v.operands[1]!, block, idom, depth - 1) + ); + if (v.op === "blockparam" && !v.isException && v.block && !v.block.isCatch) { + const b = v.block; + if (b.predEdges.length === 0) return false; + const argIdx = b.argIndexOfParam(v); + let anyProven = false; + for (const e of b.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; + if (!arg) return false; + if (arg === v) continue; // self-edge: vacuous + if (!provenNumberAt(arg, block, idom, depth - 1)) return false; + anyProven = true; + } + return anyProven; + } + return false; +} + +// --- pass (a) part 1: dominated/proven guard folding ------------------------ + +function foldProvenGuards(fn: Func, stats: OptStats): boolean { + let changed = false; + const { rpo } = computeRPO(fn); + const idom = computeDominators(fn, rpo); + // folding only REMOVES edges, so dominance only grows and a + // momentarily-stale idom stays conservative; predEdges (which + // blockEntryFact reads) are maintained live by condBrToBr. + for (const b of fn.blocks) { + const term = b.terminator; + if (!term || term.op !== "cond_br") continue; + const cond = term.operands[0]!; + if (!isNumberGuard(cond)) continue; + if (provenNumberAt(cond.operands[0]!, b, idom)) { + condBrToBr(fn, b, 0); + stats.guards_folded++; + changed = true; + } + } + if (changed) sweepUnreachableBlocks(fn); + return changed; +} + +// --- pass (a) part 2: guard-region recognition + merging -------------------- + +interface EdgeRef { + inst: Inst; + targetIndex: number; +} + +interface GuardRegion { + head: Block; // ends in cond_br on a number guard + fastBlocks: Set; // true-side blocks strictly between head and join + guardFalseEdges: EdgeRef[]; // every guard's false edge (all -> slowEntry) + fastExitEdges: EdgeRef[]; // fast-side edges into the join + slowEntry: Block; + slowChain: Block[]; // slowEntry .. slow exit, linear + slowSet: Set; + slowExitEdge: EdgeRef; // the slow chain's edge into the join + join: Block; +} + +const MAX_REGION_BLOCKS = 40; + +// structurally verify (not assume) the guard-region shape headed at +// `head`. Returns null the moment anything deviates. +function matchRegionAt(head: Block): GuardRegion | null { + const term = head.terminator; + if (!term || term.op !== "cond_br") return null; + const cond = term.operands[0]!; + if (!isNumberGuard(cond)) return null; + const t0 = term.targets![0]!; + const t1 = term.targets![1]!; + if (t0.args.length !== 0 || t1.args.length !== 0) return null; + const slowEntry = t1.block; + if (slowEntry.isCatch || t0.block.isCatch) return null; + if (slowEntry.params.length !== 0) return null; + if (t0.block === slowEntry) return null; + + // --- slow side: a linear chain of whitelisted generic ops + const slowChain: Block[] = []; + const slowSet = new Set(); + let join: Block | null = null; + let slowExitEdge: EdgeRef | null = null; + let sb = slowEntry; + for (;;) { + if (slowChain.length > MAX_REGION_BLOCKS) return null; + if (slowSet.has(sb) || sb === head) return null; + slowChain.push(sb); + slowSet.add(sb); + const bt = sb.terminator; + if (!bt) return null; + for (const inst of sb.insts) { + if (inst === bt) continue; + if (inst.targets && inst.targets.length > 0) return null; + if (!SLOW_OPS.has(inst.op) && opInfo(inst.op).effects !== Effect.NONE) return null; + } + let exit: EdgeRef; + if (bt.op === "br") { + exit = { inst: bt, targetIndex: 0 }; + } else if ( + SLOW_OPS.has(bt.op) && + bt.targets && + bt.targets.length === 2 && + bt.targets[0]!.kind === "normal" + ) { + // a generic op inside a protected region: [normal, unwind] + exit = { inst: bt, targetIndex: 0 }; + } else { + return null; + } + const next = exit.inst.targets![exit.targetIndex]!.block; + if (next.isCatch) return null; + // interior slow blocks are reachable only from the chain; the + // join is the first successor with an outside predecessor + if (next.predEdges.every((e) => slowSet.has(e.inst.block!))) { + sb = next; + continue; + } + join = next; + slowExitEdge = exit; + break; + } + if (!join || join.isCatch || join === head) return null; + + // --- fast side: effect-free blocks from the true target to the join + const fastBlocks = new Set(); + const guardFalseEdges: EdgeRef[] = [{ inst: term, targetIndex: 1 }]; + const fastExitEdges: EdgeRef[] = []; + const work: Block[] = [t0.block]; + while (work.length > 0) { + const fb = work.pop()!; + if (fastBlocks.has(fb)) continue; + if (fastBlocks.size > MAX_REGION_BLOCKS) return null; + if (fb === join || fb === head || slowSet.has(fb) || fb.isCatch) return null; + fastBlocks.add(fb); + const ft: Inst | null = fb.terminator; + if (!ft) return null; + for (const inst of fb.insts) { + if (inst === ft) continue; + if (inst.targets && inst.targets.length > 0) return null; + // at most GC (const/unbox/box/f64_*/has_tag): re-orderable + // around nothing, skippable by nothing — the region never + // skips or repeats fast blocks, this just proves they are + // unobservable when the slow path re-runs their work + if ((opInfo(inst.op).effects & ~Effect.GC) !== 0) return null; + } + if (ft.op === "br") { + const tg: Target = ft.targets![0]!; + // fast-internal br edges may carry args (a previous merge + // leaves former joins — blocks with params — on the fast + // side); the pred check below confirms membership + if (tg.block === join) fastExitEdges.push({ inst: ft, targetIndex: 0 }); + else work.push(tg.block); + } else if (ft.op === "cond_br") { + const c = ft.operands[0]!; + let arms: number[]; + if (isNumberGuard(c)) { + const f = ft.targets![1]!; + if (f.block !== slowEntry || f.args.length !== 0) return null; + guardFalseEdges.push({ inst: ft, targetIndex: 1 }); + arms = [0]; + } else if (c.type === "i1") { + arms = [0, 1]; // f64_lt-style split: both arms stay fast + } else { + return null; + } + for (const i of arms) { + const tg: Target = ft.targets![i]!; + if (tg.block === join) { + fastExitEdges.push({ inst: ft, targetIndex: i }); + } else { + if (tg.args.length !== 0) return null; + work.push(tg.block); + } + } + } else { + return null; // return/throw/invoke inside the fast side + } + } + if (fastExitEdges.length === 0) return null; + // the fast side is entered only through the head's guard + for (const fb of fastBlocks) { + for (const e of fb.predEdges) { + const src = e.inst.block!; + if (src !== head && !fastBlocks.has(src)) return null; + } + } + + return { + head: head, + fastBlocks: fastBlocks, + guardFalseEdges: guardFalseEdges, + fastExitEdges: fastExitEdges, + slowEntry: slowEntry, + slowChain: slowChain, + slowSet: slowSet, + slowExitEdge: slowExitEdge!, + join: join, + }; +} + +// merge the region headed at r1.join (if any) into r1. Returns true if +// the CFG changed. All checks precede all mutations. +function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: OptStats): boolean { + const j1 = r1.join; + const r2 = matchRegionAt(j1); + if (!r2) return false; + const j2 = r2.join; + + // region2 must live strictly below region1 (no sharing, no cycles) + if (j2 === r1.head || j2 === j1 || r1.fastBlocks.has(j2) || r1.slowSet.has(j2)) return false; + if (r2.slowEntry === r1.slowEntry) return false; + for (const b of r2.fastBlocks) + if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + for (const b of r2.slowChain) + if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + + // j2's predecessors must be exactly region2's exits (routing fills + // every edge; a foreign edge would get an undominated value) + for (const e of j2.predEdges) { + const src = e.inst.block!; + if (!r2.fastBlocks.has(src) && !r2.slowSet.has(src)) return false; + } + + // j1's instruction shape: [effect-free prefix..., guard, cond_br] + const term = j1.terminator!; + const guard = term.operands[0]!; + let prefixEnd = j1.insts.length - 1; + if (guard.block === j1) { + if (j1.insts[j1.insts.length - 2] !== guard) return false; + prefixEnd = j1.insts.length - 2; + // the guard may only feed this cond_br (an extra use would need + // slow-side routing of a raw i1 — not a shape we build) + let extraUse = false; + fn.forEachInst((inst) => { + if (inst === term) return; + for (const o of inst.operands) if (o === guard) extraUse = true; + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a === guard) extraUse = true; + }); + if (extraUse) return false; + } + const prefix: Inst[] = []; + for (let i = 0; i < prefixEnd; i++) { + const q = j1.insts[i]!; + if (q.targets && q.targets.length > 0) return false; + if (opInfo(q.op).effects !== Effect.NONE) return false; + prefix.push(q); + } + + // re-execution check: region2's guard failures jump to r1.slowEntry, + // re-running r1's slow chain after r1's fast side already ran. Every + // instruction there must be effect-free or a whitelisted generic op + // whose operands are proven numbers at ALL of r1's fast exits (the + // only ways into region2's guards). + for (const sb of r1.slowChain) { + for (const inst of sb.insts) { + if (inst.op === "br") continue; + if (SLOW_OPS.has(inst.op)) { + for (const o of inst.operands) { + for (const fe of r1.fastExitEdges) { + if (!provenNumberAt(o, fe.inst.block!, idom)) return false; + } + } + } else if (opInfo(inst.op).effects !== Effect.NONE) { + return false; + } + } + } + + // what the slow path knows each J1-defined value to be + const slowMap = new Map(); + const exitTarget = r1.slowExitEdge.inst.targets![r1.slowExitEdge.targetIndex]!; + for (const p of j1.params) { + const arg = exitTarget.args[j1.argIndexOfParam(p)]; + if (!arg) return false; + slowMap.set(p, arg); + } + + // routing pre-check: every use of a J1-defined value outside region2 + // must be dominated by j2 (it gets a routed param there) + const routed: Inst[] = [...j1.params, ...prefix]; + // per value: uses that need the routed param / the slow substitute + const outsideUses = new Map(); // value -> using insts + for (const v of routed) { + const outs: Inst[] = []; + let ok = true; + fn.forEachInst((inst, blk) => { + if (!ok) return; + let uses = false; + for (const o of inst.operands) if (o === v) uses = true; + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a === v) uses = true; + if (!uses) return; + if (blk === j1 || r2.fastBlocks.has(blk)) return; // stays valid (j1 dominates) + if (r2.slowSet.has(blk)) return; // substituted below + if (!dominates(idom, j2, blk)) { + ok = false; // e.g. a catch handler outside the region + return; + } + outs.push(inst); + }); + if (!ok) return false; + if (outs.length > 0) outsideUses.set(v, outs); + } + + // ---- all checks passed; mutate ---- + const mapSlow = (v: Inst): Inst => slowMap.get(v) ?? v; + + // clone the pure prefix into r1's slow exit block so the slow chain + // (and routing) can see those values + const slowExitBlock = r1.slowChain[r1.slowChain.length - 1]!; + const exitInst = r1.slowExitEdge.inst; + for (const q of prefix) { + const clone = new Inst(fn, q.op, q.operands.map(mapSlow), { ...q.imms }); + clone.block = slowExitBlock; + slowExitBlock.insts.splice(slowExitBlock.insts.indexOf(exitInst), 0, clone); + slowMap.set(q, clone); + } + + // r1's slow path now falls through into r2's slow chain: the single + // merged slow path is the full generic computation in program order + retargetEdge(exitInst, r1.slowExitEdge.targetIndex, r2.slowEntry, []); + // r2's guard failures re-enter the merged slow path from the top + for (const ge of r2.guardFalseEdges) retargetEdge(ge.inst, ge.targetIndex, r1.slowEntry, []); + // r2's slow chain computes on the slow-side values + for (const sb of r2.slowChain) { + for (const inst of sb.insts) { + for (let i = 0; i < inst.operands.length; i++) + inst.operands[i] = mapSlow(inst.operands[i]!); + if (inst.targets) + for (const t of inst.targets) + for (let i = 0; i < t.args.length; i++) + if (t.args[i]) t.args[i] = mapSlow(t.args[i]!); + } + } + + // route J1-defined values still used beyond region2 through j2 + for (const entry of outsideUses.entries()) { + const v = entry[0]; + const users = entry[1]; + const vr = j2.addParam(v.nameHint); + vr.type = v.type; + const slot = j2.argIndexOfParam(vr); + for (const e of j2.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + t.args[slot] = r2.slowSet.has(e.inst.block!) ? mapSlow(v) : v; + } + for (const u of users) { + for (let i = 0; i < u.operands.length; i++) if (u.operands[i] === v) u.operands[i] = vr; + if (u.targets) + for (const t of u.targets) + for (let i = 0; i < t.args.length; i++) if (t.args[i] === v) t.args[i] = vr; + } + } + + stats.regions_merged++; + return true; +} + +// --- pass (b): raw f64 params for optimizer-rewired joins ------------------- + +export function rawJoinParams(fn: Func, stats: OptStats): boolean { + // candidates: non-entry, non-catch params whose every incoming arg is + // a box_f64, an f64 value, itself, or another candidate param + const cands = new Set(); + for (const b of fn.blocks) { + if (b.isCatch || b === fn.entry) continue; + if (b.predEdges.length === 0) continue; + for (const p of b.params) { + if (p.isException || p.type !== "any") continue; + let ok = true; + for (const e of b.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + if (t.kind === "unwind") { + ok = false; + break; + } + const arg = t.args[b.argIndexOfParam(p)]; + if (!arg) { + ok = false; + break; + } + if (arg === p || arg.op === "box_f64" || arg.type === "f64") continue; + if (arg.op === "blockparam" && !arg.isException) continue; // resolved in pruning + ok = false; + break; + } + if (ok) cands.add(p); + } + } + if (cands.size === 0) return false; + + // uses of every box_f64 that feeds a candidate (for the strip check) + const boxUses = new Map(); + fn.forEachInst((inst) => { + const record = (v: Inst, opIndex: number) => { + if (v.op !== "box_f64") return; + const list = boxUses.get(v); + if (list) list.push({ inst: inst, opIndex: opIndex }); + else boxUses.set(v, [{ inst: inst, opIndex: opIndex }]); + }; + for (let i = 0; i < inst.operands.length; i++) record(inst.operands[i]!, i); + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a) record(a, -1); + }); + + // params fed by an edge-arg use of value v (empty if any use is not + // an edge arg) + const paramsFedBy = (v: Inst): Inst[] | null => { + const fed: Inst[] = []; + for (const u of boxUses.get(v) || []) { + if (u.opIndex !== -1) return null; // consumed as an operand + for (const t of u.inst.targets!) { + for (let i = 0; i < t.args.length; i++) { + if (t.args[i] !== v) continue; + const p = t.block.params[i + (t.block.isCatch ? 1 : 0)]; + if (!p) return null; + fed.push(p); + } + } + } + return fed; + }; + + // prune to a fixpoint. Two conditions: + // - every arg is admissible (box_f64 strippable / f64 / candidate); + // - the candidate is ROOTED: some arg chain reaches an actual f64 + // producer. A cycle of params feeding only each other must not + // self-justify — there would be no f64 anywhere in it (the + // verifier would reject the result; refuse it here instead). + let pruned = true; + while (pruned) { + pruned = false; + for (const p of cands) { + const b = p.block!; + const argIdx = b.argIndexOfParam(p); + let keep = true; + for (const e of b.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]!; + if (arg === p || arg.type === "f64") continue; + if (arg.op === "blockparam") { + if (!cands.has(arg)) keep = false; + } else if (arg.op === "box_f64") { + // stripping the box must leave it dead: every use an + // edge arg into a candidate param + const fed = paramsFedBy(arg); + if (!fed || !fed.every((fp) => cands.has(fp) || fp.type === "f64")) + keep = false; + } + if (!keep) break; + } + if (!keep) { + cands.delete(p); + pruned = true; + } + } + // rootedness: propagate from box_f64/f64 args through the + // candidate graph; drop anything unreached + const rooted = new Set(); + let grew = true; + while (grew) { + grew = false; + for (const p of cands) { + if (rooted.has(p)) continue; + const b = p.block!; + const argIdx = b.argIndexOfParam(p); + for (const e of b.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]!; + if ( + arg.op === "box_f64" || + arg.type === "f64" || + (arg.op === "blockparam" && rooted.has(arg)) + ) { + rooted.add(p); + grew = true; + break; + } + } + } + } + for (const p of cands) { + if (!rooted.has(p)) { + cands.delete(p); + pruned = true; + } + } + } + if (cands.size === 0) return false; + + // convert: retype params, strip boxes on the edges + for (const p of cands) { + p.type = "f64"; + p.rawJoin = true; + stats.raw_join_params++; + const b = p.block!; + const argIdx = b.argIndexOfParam(p); + for (const e of b.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + const arg = t.args[argIdx]!; + if (arg.op === "box_f64") t.args[argIdx] = arg.operands[0]!; + } + } + + // rewrite uses: unbox_f64(p) collapses to p; anything still needing + // a boxed value re-boxes once at the head of p's block (the single + // box at the region exit) + for (const p of cands) { + const b = p.block!; + const unboxes: Inst[] = []; + const boxedUsers: Inst[] = []; + fn.forEachInst((inst) => { + if (inst.op === "unbox_f64" && inst.operands[0] === p) { + if (!inst.targets || inst.targets.length === 0) unboxes.push(inst); + return; + } + let boxedUse = false; + const info = opInfo(inst.op); + inst.operands.forEach((o, i) => { + if (o !== p) return; + const want = info.sig ? info.sig.params[i] : undefined; + if (want !== "f64") boxedUse = true; + }); + if (inst.targets) { + for (const t of inst.targets) { + t.args.forEach((a, i) => { + if (a !== p) return; + const tp = t.block.params[i + (t.block.isCatch ? 1 : 0)]; + if (!tp || tp.type !== "f64") boxedUse = true; + }); + } + } + if (boxedUse) boxedUsers.push(inst); + }); + for (const u of unboxes) { + // u's consumers take f64: p is one now + fn.forEachInst((inst) => { + for (let i = 0; i < inst.operands.length; i++) + if (inst.operands[i] === u) inst.operands[i] = p; + if (inst.targets) + for (const t of inst.targets) + for (let i = 0; i < t.args.length; i++) if (t.args[i] === u) t.args[i] = p; + }); + const ub = u.block!; + ub.insts.splice(ub.insts.indexOf(u), 1); + u.block = null; + } + if (boxedUsers.length > 0) { + const nb = new Inst(fn, "box_f64", [p], {}); + nb.block = b; + b.insts.unshift(nb); + for (const u of boxedUsers) { + const info = opInfo(u.op); + u.operands.forEach((o, i) => { + if (o !== p) return; + const want = info.sig ? info.sig.params[i] : undefined; + if (want !== "f64") u.operands[i] = nb; + }); + if (u.targets) { + for (const t of u.targets) { + t.args.forEach((a, i) => { + if (a !== p) return; + const tp = t.block.params[i + (t.block.isCatch ? 1 : 0)]; + if (!tp || tp.type !== "f64") t.args[i] = nb; + }); + } + } + } + } + } + return true; +} + +// --- driver ----------------------------------------------------------------- + +// run guard folding + region merging to a fixpoint. Cheap bail when the +// function has no number guards (every flag-off compile). +export function optimizeGuardRegions(fn: Func, stats: OptStats): boolean { + let hasGuard = false; + for (const b of fn.blocks) { + const t = b.terminator; + if (t && t.op === "cond_br" && isNumberGuard(t.operands[0]!)) { + hasGuard = true; + break; + } + } + if (!hasGuard) return false; + + // drop builder-era unreachable blocks up front: region matching and + // the routing dominance checks assume every block in fn.blocks is + // reachable (flag-off compiles bailed above and stay byte-pure) + sweepUnreachableBlocks(fn); + + let changedAny = false; + for (let round = 0; round < 50; round++) { + let changed = false; + // merge FIRST, fold after: folding an adjacent diamond's guards + // early dissolves its slow path and leaves a mixed fast/slow + // join in the middle of what should become one region — the + // merged fast side would keep box/unbox round-trips. Merging + // needs no folding to match (interior guard steps and dup + // guards are part of the recognized shape). + for (let merges = 0; merges < 50; merges++) { + const { rpo } = computeRPO(fn); + const idom = computeDominators(fn, rpo); + let merged = false; + for (const b of rpo) { + const r1 = matchRegionAt(b); + if (!r1) continue; + if (tryMergeAt(fn, r1, idom, stats)) { + merged = true; + changed = true; + break; // mutations invalidate matches; re-match + } + } + if (!merged) break; + } + if (foldProvenGuards(fn, stats)) changed = true; + if (!changed) break; + sweepUnreachableBlocks(fn); + changedAny = true; + } + return changedAny; +} diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index d9a40250..de69b436 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -22,6 +22,7 @@ import { Func, Inst, Module, replaceAllUses } from "./ir"; import { Effect, opInfo } from "./ops"; +import { optimizeGuardRegions, rawJoinParams } from "./optimize-guards"; export interface OptStats { allocs_sunk: number; @@ -29,10 +30,23 @@ export interface OptStats { calls_inlined: number; iters_folded: number; dead_removed: number; + // Phase 3.4 guard-region passes (optimize-guards.ts) + guards_folded: number; + regions_merged: number; + raw_join_params: number; } function newStats(): OptStats { - return { allocs_sunk: 0, reads_folded: 0, calls_inlined: 0, iters_folded: 0, dead_removed: 0 }; + return { + allocs_sunk: 0, + reads_folded: 0, + calls_inlined: 0, + iters_folded: 0, + dead_removed: 0, + guards_folded: 0, + regions_merged: 0, + raw_join_params: 0, + }; } // uses of `value` within fn, with enough position info to classify @@ -606,6 +620,12 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; } + // Phase 3.4: guard-region passes over the --types diamonds. They run + // after the general fixpoint (env scalarization has exposed the SSA + // values the diamonds guard) and bail immediately when lowering + // emitted no number guards — every flag-off compile. + if (optimizeGuardRegions(fn, s)) eliminateDead(fn, s); + if (rawJoinParams(fn, s)) eliminateDead(fn, s); return s; } diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 2eb1cbde..cfe2b695 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -1261,6 +1261,188 @@ test("typed-arith: mul/div diamonds carry their ops", () => { } }); +// --- Phase 3.4: guard-region merging + raw f64 joins ------------------------------ + +// like the real maam oracle, this types the named identifiers as +// {number} AND any arithmetic expression whose operands are typed — +// hypot2's `a*a + b*b` is three diamonds only because the outer add's +// BinaryExpression operands type as {number} too +function numericStubOracle(names: string[]): TypeOracle { + const numeric = (n: unknown): boolean => { + const node = n as { + type?: string; + name?: string; + operator?: string; + value?: unknown; + left?: unknown; + right?: unknown; + }; + if (node.type === "Identifier") return names.indexOf(node.name!) !== -1; + if (node.type === "Literal") return typeof node.value === "number"; + if ( + node.type === "BinaryExpression" && + (node.operator === "+" || node.operator === "-" || node.operator === "*" || node.operator === "/") + ) + return numeric(node.left) && numeric(node.right); + return false; + }; + return { + typeOfNode: (n) => (numeric(n) ? { tags: new Set(["number"]) } : { tags: "top" }), + closedWorld: () => false, + describe: () => "numeric-stub", + }; +} + +function lowerOptWithOracle(src: string, oracle: TypeOracle | null): { fn: Func; printed: string } { + let r = lowerFunctionNode(parseFn(src), undefined, oracle); + verifyModule(r.module); + optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + return { fn: r.fn, printed: printFunction(r.fn) }; +} + +function countOps(fn: Func, op: string): number { + let n = 0; + fn.forEachInst((i) => { + if (i.op === op) n++; + }); + return n; +} + +function guardFalseTargets(fn: Func): Set { + const targets = new Set(); + fn.forEachInst((i) => { + if (i.op === "cond_br" && i.operands[0]!.op === "has_tag") targets.add(i.targets![1]!.block); + }); + return targets; +} + +test("guard-fold: x * x re-tests x only once", () => { + const { fn } = lowerOptWithOracle("function f(x) { return x * x; }", numericStubOracle(["x"])); + assert(countOps(fn, "has_tag") === 1, `has_tag = ${countOps(fn, "has_tag")}`); +}); + +test("guard-merge: hypot2 becomes one guard region with one slow path", () => { + // as lowered this is three diamonds / six has_tags (see the Phase 3 + // dump); merged: one has_tag per distinct value, one slow path + const { fn } = lowerOptWithOracle( + "function hypot2(a, b) { return a * a + b * b; }", + numericStubOracle(["a", "b"]) + ); + assert(countOps(fn, "has_tag") === 2, `has_tag = ${countOps(fn, "has_tag")}`); + const ft = guardFalseTargets(fn); + assert(ft.size === 1, `guard-failure targets = ${ft.size}`); + // the full generic computation survives on the (single) slow path + assert(countOps(fn, "mul") === 2 && countOps(fn, "add") === 1, "generic ops must survive"); +}); + +test("guard-merge: merged fast region is unboxed end-to-end, boxing once", () => { + const { fn, printed } = lowerOptWithOracle( + "function hypot2(a, b) { return a * a + b * b; }", + numericStubOracle(["a", "b"]) + ); + // exactly one box at the region exit; only the region INPUTS unbox + assert(countOps(fn, "box_f64") === 1, `box_f64 = ${countOps(fn, "box_f64")}`); + assert(countOps(fn, "unbox_f64") === 4, `unbox_f64 = ${countOps(fn, "unbox_f64")}`); + // intermediate joins carry raw f64 params (the optimizer-scoped lift + // of the P2 boxed-edges rule), all marked for the verifier + let rawParams = 0; + fn.forEachInst((i) => { + if (i.op === "blockparam" && i.type === "f64") { + assert(i.rawJoin, "f64 param must carry the rawJoin marker"); + rawParams++; + } + }); + assert(rawParams >= 2, `expected f64 join params, got ${rawParams}`); + assertContains(printed, ": f64):"); // an intermediate join's param list +}); + +test("guard-merge: statement chains merge across pure prefixes (bench kernel)", () => { + // i*i, s+_, i/2 (const-operand diamond), -, i+1, s+i: six diamonds, + // two distinct guarded values, const guards fold, one slow path + const { fn } = lowerOptWithOracle( + "function k(s, i) { s = s + i * i - i / 2; i = i + 1; return s + i; }", + numericStubOracle(["s", "i"]) + ); + assert(countOps(fn, "has_tag") === 2, `has_tag = ${countOps(fn, "has_tag")}`); + const ft = guardFalseTargets(fn); + assert(ft.size === 1, `guard-failure targets = ${ft.size}`); + assert(countOps(fn, "box_f64") === 1, `box_f64 = ${countOps(fn, "box_f64")}`); +}); + +test("guard-merge: a non-dominating guard is neither folded nor merged", () => { + // D1 lives in the then-branch: its guards do NOT dominate the second + // x+y after the if-join, so nothing may fold or merge + const { fn } = lowerOptWithOracle( + "function f(c, x, y) { var t = 0; if (c) { t = x + y; } var w = x + y; return t + w; }", + numericStubOracle(["x", "y"]) + ); + assert(countOps(fn, "has_tag") === 4, `has_tag = ${countOps(fn, "has_tag")}`); + const ft = guardFalseTargets(fn); + assert(ft.size === 2, `guard-failure targets = ${ft.size}`); + // both regions still rejoin boxed: no raw params anywhere + let rawParams = 0; + fn.forEachInst((i) => { + if (i.op === "blockparam" && i.type === "f64") rawParams++; + }); + assert(rawParams === 0, `expected no f64 params, got ${rawParams}`); + assert(countOps(fn, "box_f64") === 2, `box_f64 = ${countOps(fn, "box_f64")}`); +}); + +test("guard-merge: `<` diamonds still verify and keep their shape through opt", () => { + const { fn } = lowerOptWithOracle( + "function f(x, y) { return x < y; }", + stubOracle({ x: ["number"], y: ["number"] }) + ); + assert(countOps(fn, "f64_lt") === 1, "lt fast path survives"); + assert(countOps(fn, "lt") === 1, "lt slow path survives"); +}); + +test("verifier: rawJoin marker admits f64 edge args into f64 params", () => { + const fb = new FunctionBuilder("rawjoin", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + const join = fb.newBlock("join"); + const jp = join.addParam("jp"); + jp.type = "f64"; + jp.rawJoin = true; + fb.br(join, [ua]); + fb.sealBlock(join); + fb.setInsertPoint(join); + fb.ret(fb.emit("box_f64", [jp], {})); + verifyFunction(fb.finish()); // accepted +}); + +test("verifier: an f64 param without the rawJoin marker is rejected", () => { + const fb = new FunctionBuilder("norawjoin", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + const join = fb.newBlock("join"); + const jp = join.addParam("jp"); + jp.type = "f64"; // marker NOT set: the strict P2 rule stays in force + fb.br(join, [ua]); + fb.sealBlock(join); + fb.setInsertPoint(join); + fb.ret(fb.emit("box_f64", [jp], {})); + // the edge-side strict rule fires first: without the marker the raw + // f64 argument itself is rejected + assertVerifyFails(fb.finish(), "must be boxed"); +}); + +test("verifier: a boxed arg into a rawJoin f64 param is rejected", () => { + const fb = new FunctionBuilder("boxedarg", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const join = fb.newBlock("join"); + const jp = join.addParam("jp"); + jp.type = "f64"; + jp.rawJoin = true; + fb.br(join, [a]); // boxed value into the f64 param + fb.sealBlock(join); + fb.setInsertPoint(join); + fb.ret(fb.emit("box_f64", [jp], {})); + assertVerifyFails(fb.finish(), "f64 param"); +}); + // --- oracle: TypeSig -> EirType mapping ----------------------------------------- test("oracle: TypeSig constituents map to EirType tags", () => { diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index 7721282d..71e90f66 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -16,7 +16,7 @@ import { opInfo, isTerminator } from "./ops"; import { printInst } from "./printer"; import type { Func, Block, Inst, Module } from "./ir"; -function computeRPO(fn: Func): { rpo: Block[]; reachable: Set } { +export function computeRPO(fn: Func): { rpo: Block[]; reachable: Set } { const entry = fn.entry!; const visited = new Set(); const postorder: Block[] = []; @@ -41,7 +41,7 @@ function computeRPO(fn: Func): { rpo: Block[]; reachable: Set } { } // Cooper/Harvey/Kennedy "A Simple, Fast Dominance Algorithm" -function computeDominators(fn: Func, rpo: Block[]): Map { +export function computeDominators(fn: Func, rpo: Block[]): Map { const entry = fn.entry!; const index = new Map(); rpo.forEach((b, i) => index.set(b, i)); @@ -77,7 +77,7 @@ function computeDominators(fn: Func, rpo: Block[]): Map { return idom; } -function dominates(idom: Map, a: Block, b: Block): boolean { +export function dominates(idom: Map, a: Block, b: Block): boolean { // does block a dominate block b? let runner = b; for (;;) { @@ -203,9 +203,39 @@ export function verifyFunction(fn: Func): boolean { // - branch-edge arguments must be boxed: block params are EjsValue // phis in the emitter, so f64/i1 may NOT cross block boundaries. // (Phase 3's guarded diamonds carry values across joins boxed.) + // Phase 3.4's ONE controlled exception: a param carrying the + // optimizer's rawJoin marker (Inst.rawJoin) is an f64-typed phi + // (double in the emitter) and takes exactly f64 arguments. The + // marker is provenance, not trust — the full safety conditions + // are re-checked here, so the strict rule stays in force for + // every lowering-created edge: lowering never sets the marker, + // and an f64 param WITHOUT it is rejected outright. i1 never + // crosses a block boundary under any rule. + // Exception-safety: a rawJoin param can never materialize an f64 + // in a handler entry — catch blocks and unwind edges are + // rejected below — and an f64 value can never be *treated as* an + // ejsval in a handler (or anywhere), because every ejsval-taking + // slot and every boxed param rejects f64-typed operands/args. const isRaw = (t: string) => t === "f64" || t === "i1"; for (const b of fn.blocks) { if (!reachable.has(b)) continue; + for (const p of b.params) { + if (p.type === "f64") { + if (!p.rawJoin) + fail(`f64 block param without the optimizer's rawJoin marker`, p); + if (b.isCatch || p.isException) + fail(`rawJoin f64 param on a catch block / exception param`, p); + for (const e of b.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + if (t.kind === "unwind") fail(`rawJoin f64 param fed by an unwind edge`, p); + const a = t.args[b.argIndexOfParam(p)]; + if (a && a.type !== "f64") + fail(`rawJoin f64 param receives a ${a.type} argument`, e.inst); + } + } else if (p.rawJoin) { + fail(`rawJoin marker on a non-f64 block param`, p); + } + } for (const inst of b.insts) { const info = opInfo(inst.op); inst.operands.forEach((o, idx) => { @@ -224,12 +254,27 @@ export function verifyFunction(fn: Func): boolean { }); if (inst.targets) for (const t of inst.targets) - for (const a of t.args) - if (a && isRaw(a.type)) + t.args.forEach((a, i) => { + if (!a) return; + const param = t.block.params[i + (t.block.isCatch ? 1 : 0)]; + if (a.type === "f64") { + if (!param || !param.rawJoin || param.type !== "f64") + fail( + `edge to ^${t.block.name} passes a raw ${a.type} value; block arguments must be boxed`, + inst + ); + } else if (a.type === "i1") { fail( `edge to ^${t.block.name} passes a raw ${a.type} value; block arguments must be boxed`, inst ); + } else if (param && param.type === "f64") { + fail( + `edge to ^${t.block.name} passes a boxed value to an f64 param`, + inst + ); + } + }); } } From 4ef1e28d9600124b96472780d5d9de83ce35f7dd Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 22 Jul 2026 23:47:28 -0700 Subject: [PATCH 095/146] eir: P3.4 review fixes -- j1 exhaustiveness + generic-twin verification Adversarial review found two latent miscompiles in tryMergeAt on verifier-valid IR (not constructible from JS through today's lowering, but direct violations of the structurally-verified-never-assumed contract). Both get localized pre-checks plus refusal unit tests: - j1 predecessor exhaustiveness: j1's preds must be exactly region1's exits, mirroring the existing j2 check. A foreign edge into j1 made region2's guards reachable without region1 having run, while the merge substituted region2's slow operands with region1's slow-side values -- wrong on the foreign path (attack A: returned (a*a)^2 where semantics demand mul(c,c)). - generic-twin verification: region2's slow chain must be the generic rendition of its fast side -- same arithmetic ops in order, operands corresponding under the box/unbox/interior-param mapping, join-exit args corresponding slot for slot. The merge reroutes region1-slow executions whose region2 guards would have PASSED (e.g. a guard on a mul result) through region2's slow chain; twin-ness is what makes that value-identical (attack F: fast p*p vs slow mul(p,e) diverged). A region2 containing f64_lt now declines to merge (the boolean-twin correspondence buys nothing measurable; lt regions still merge as region1). Also from review: routing now refuses raw-typed (i1/f64) j1-values live past region2 up front (fail-closed, documented); a dedicated unit test for the loop-carried rawJoin conversion (fully-proven f64 loop param); ir.ts's rawJoin comment corrected to state the actual contract -- structural qualification (f64-rooted, verifier-checked), not provenance-linked. Verified: attack A and attack F shapes refuse to merge (and an honest-twin control of the attack-F CFG still merges); hypot2 and the bench kernel merge exactly as before (hypot2 regions_merged=2 / guards_folded=4; types-bench1 diamonds=9, 0.23 s re-verified); //:test-eir 118 tests green; full matrix green; --types diff lane still 458 files / 0 divergent / 67 diamonds. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 33 ++++++++ lib/eir/ir.ts | 21 ++++-- lib/eir/optimize-guards.ts | 150 ++++++++++++++++++++++++++++++++++++- lib/eir/tests.ts | 142 +++++++++++++++++++++++++++++++++++ 4 files changed, 336 insertions(+), 10 deletions(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index 61c99b59..ef8742a3 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -503,3 +503,36 @@ dominance reasoning; the raw-f64-join lift is scoped by a verifier-re-checked marker rather than a global weakening; the microbenchmark ceiling moves 10.3× → 14.0×, and the remaining box/unbox traffic sits exactly where P3.6 (typed calling convention) picks up. + +## Review fixes (adversarial pass over the merge) + +Two latent unsoundnesses were found by adversarial review on +verifier-valid IR (neither constructible from JS through today's +lowering, both violations of the "structurally verified, never assumed" +contract) and are fixed with localized pre-checks in `tryMergeAt`, each +with a refusal unit test: + +- **J1 predecessor exhaustiveness**: j1's predecessors must be exactly + region1's exits (mirroring the existing j2 check). A foreign edge + into j1 made region2's guards reachable without region1 having run, + while the merge substituted region2's slow operands with region1's + slow-side values — wrong on the foreign path. +- **Generic-twin verification** (`verifyGenericTwin`): region2's slow + chain must be the generic rendition of its fast side — same + arithmetic ops in the same order, operands corresponding under the + box/unbox mapping, join-exit args corresponding slot for slot. The + reroute sends executions whose region2 guards would have passed + (e.g. a guard on a mul result) through the slow chain; twin-ness is + what makes that value-identical. One deliberate narrowing: a region2 + containing `f64_lt` now declines to merge (the boolean-twin + correspondence buys nothing measurable; lt regions still merge as + region1) — hypot2/bench shapes and stats are unaffected + (regions_merged and all measured numbers unchanged; bench re-verified + at 0.23 s). + +Also from review: routing explicitly refuses raw-typed (i1/f64) +j1-values live past region2 (fail-closed, now documented + enforced up +front); the loop-carried rawJoin conversion (a fully-proven f64 loop +param) gained a dedicated unit test; ir.ts's rawJoin comment now states +the actual contract (structural qualification, verifier-checked — not +provenance-linked). diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts index f3e544dd..7f8a50d5 100644 --- a/lib/eir/ir.ts +++ b/lib/eir/ir.ts @@ -179,14 +179,19 @@ export class Inst { removed = false; // Phase 3.4 pass (b): a block parameter that carries a RAW f64 across // its incoming edges — the controlled lift of the Phase 2 - // raw-values-cannot-cross-blocks rule. Set ONLY by the optimizer's - // guard-region merge (optimize-guards.ts) on joins it builds/rewires; - // lowering must never set it, so every lowering-created edge keeps - // the strict boxed rule. The marker is not trusted on its own: the - // verifier independently checks the full safety conditions (type is - // f64, every incoming argument is f64, non-catch block, no unwind - // edges), so a stray marker can only ever *tighten* checking, never - // admit an ill-typed edge. The emitter types the phi as double. + // raw-values-cannot-cross-blocks rule. Set only by the optimizer + // (optimize-guards.ts rawJoinParams); lowering must never set it, so + // every lowering-created edge keeps the strict boxed rule. The + // qualification is STRUCTURAL, not provenance-linked: any param + // whose every incoming argument provably carries an f64 (strippable + // box_f64 / f64 value / another converted param, rooted in a real + // f64 producer) may convert — guard-region merges create most such + // shapes, but e.g. a fully-proven loop-carried param qualifies too. + // The marker is not trusted on its own: the verifier independently + // checks the full safety conditions (type is f64, every incoming + // argument is f64, non-catch block, no unwind edges), so a stray + // marker can only ever *tighten* checking, never admit an ill-typed + // edge. The emitter types the phi as double. rawJoin = false; constructor(fn: Func, op: string, operands?: Inst[], imms?: Imms) { diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index 8c8c6add..ff542656 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -73,11 +73,22 @@ // numbers at R1's fast exits: a generic op on numbers is pure, non- // throwing (its unwind edge stays untaken), and returns bit-for-bit // the f64 result the fast side already computed. +// - J1's predecessors must be EXACTLY R1's exits and J2's exactly +// R2's: a foreign edge into either join would make the substituted +// slow values wrong (J1) or undominated (J2) on the foreign path. +// - R2's slow chain must be the GENERIC TWIN of its fast side +// (verifyGenericTwin): same arithmetic ops in the same order with +// corresponding operands and corresponding join-exit arguments. +// The reroute sends executions whose R2 guards would have PASSED +// (e.g. a guard on a mul result) through the slow chain instead of +// the fast arm; twin-ness is what makes that value-identical. // - values defined at J1 (params + the pure instruction prefix ahead // of R2's guard) that are still used beyond R2 are routed through // R2's join as new params — fast edges pass the J1 value, the slow // edge passes its slow-side substitute — after checking that every -// such use IS dominated by that join (else the merge is refused). +// such use IS dominated by that join (else the merge is refused); +// raw-typed (i1/f64) values are never routed — merge refused +// (fail-closed). // // Raw f64 joins (pass b): a param is converted only when every incoming // argument is a box_f64 result (whose only consumers are edges feeding @@ -412,6 +423,114 @@ function matchRegionAt(head: Block): GuardRegion | null { }; } +// EIR f64 op -> its generic twin +const F64_TO_GENERIC: Record = { + f64_add: "add", + f64_sub: "sub", + f64_mul: "mul", + f64_div: "div", + f64_lt: "lt", +}; + +// Verify that region2's slow chain is the generic rendition of its fast +// side: the same arithmetic ops in the same order, with operands that +// correspond under the box/unbox mapping, and join-exit arguments that +// correspond slot for slot. On number inputs a generic op is pure and +// bit-identical to its f64 twin, so this is exactly the condition under +// which rerouting a would-have-taken-the-fast-arm execution through the +// slow chain preserves behavior. Anything unrecognized refuses. +// +// Correspondence rules (fast value -> the slow value it must equal): +// unbox_f64(x) -> slowOf(x) +// earlier paired f64 op -> that op's slow twin's result +// where slowOf(x): +// box_f64(f) -> f's rule above +// param of an interior fast block -> slowOf(its single incoming arg) +// j1 params / anything else -> x itself (the slow chain sees +// the same SSA value; the merge's sigma rewrites j1 params later) +// +// f64_lt (and hence const-boolean split arms) is refused as region2 — +// its boolean twin adds checking surface for shapes with no measured +// benefit; lt regions still merge fine as region1. +function verifyGenericTwin(r2: GuardRegion): boolean { + if (r2.fastExitEdges.length !== 1) return false; // lt splits etc. + + const slowOps: Inst[] = []; + for (const sb of r2.slowChain) + for (const inst of sb.insts) if (SLOW_OPS.has(inst.op)) slowOps.push(inst); + + const pair = new Map(); // fast f64 op -> slow twin + + const slowOfBoxed = (x: Inst, d: number): Inst | null => { + if (d <= 0) return null; + if (x.op === "box_f64") return slowOfF64(x.operands[0]!, d - 1); + if (x.op === "blockparam" && x.block && r2.fastBlocks.has(x.block)) { + const b = x.block; + if (b.predEdges.length !== 1) return null; + const e = b.predEdges[0]!; + const arg = e.inst.targets![e.targetIndex]!.args[b.argIndexOfParam(x)]; + return arg ? slowOfBoxed(arg, d - 1) : null; + } + return x; + }; + const slowOfF64 = (f: Inst, d: number): Inst | null => { + if (d <= 0) return null; + if (f.op === "unbox_f64") return slowOfBoxed(f.operands[0]!, d - 1); + return pair.get(f) ?? null; // must be an already-paired f64 op + }; + + // linear walk of the fast side (single path: guards have one fast + // arm, lt splits are refused above), pairing arithmetic in order + let k = 0; + const seen = new Set(); + let b: Block | null = r2.head.terminator!.targets![0]!.block; + let exitArgs: (Inst | null)[] | null = null; + while (b) { + if (b === r2.join || seen.has(b) || !r2.fastBlocks.has(b)) return false; + seen.add(b); + const t: Inst = b.terminator!; + for (const inst of b.insts) { + if (inst === t) break; + const gop = F64_TO_GENERIC[inst.op]; + if (!gop) continue; // unbox/box/const/has_tag: no twin needed + if (inst.op === "f64_lt") return false; + if (k >= slowOps.length) return false; + const tw = slowOps[k++]!; + if (tw.op !== gop) return false; + for (let i = 0; i < inst.operands.length; i++) { + const want = slowOfF64(inst.operands[i]!, 32); + if (!want || want !== tw.operands[i]) return false; + } + pair.set(inst, tw); + } + if (t.op === "br") { + const tg: Target = t.targets![0]!; + if (tg.block === r2.join) { + exitArgs = tg.args; + b = null; + } else b = tg.block; + } else if (t.op === "cond_br" && isNumberGuard(t.operands[0]!)) { + b = t.targets![0]!.block; + } else { + return false; + } + } + if (!exitArgs || k !== slowOps.length) return false; + + // join-exit correspondence: what flows out of the fast arm must be + // what flows out of the slow chain, slot for slot + const slowExitArgs = r2.slowExitEdge.inst.targets![r2.slowExitEdge.targetIndex]!.args; + if (exitArgs.length !== slowExitArgs.length) return false; + for (let i = 0; i < exitArgs.length; i++) { + const fa = exitArgs[i]; + const sa = slowExitArgs[i]; + if (!fa || !sa) return false; + const want = slowOfBoxed(fa, 32); + if (!want || want !== sa) return false; + } + return true; +} + // merge the region headed at r1.join (if any) into r1. Returns true if // the CFG changed. All checks precede all mutations. function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: OptStats): boolean { @@ -428,6 +547,15 @@ function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: O for (const b of r2.slowChain) if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + // j1's predecessors must be exactly region1's exits. A foreign edge + // into j1 means region2's guards are reachable WITHOUT region1 + // having run; the slow-side substitution below would then hand + // region2's slow chain region1's slow values, which hold garbage on + // the foreign path (review attack A). + for (const e of j1.predEdges) { + const src = e.inst.block!; + if (!r1.fastBlocks.has(src) && !r1.slowSet.has(src)) return false; + } // j2's predecessors must be exactly region2's exits (routing fills // every edge; a foreign edge would get an undominated value) for (const e of j2.predEdges) { @@ -435,6 +563,16 @@ function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: O if (!r2.fastBlocks.has(src) && !r2.slowSet.has(src)) return false; } + // region2's slow chain must be the GENERIC TWIN of its fast side. + // The merge reroutes region1's slow exit straight into region2's + // slow chain — including executions where region2's guards would + // have PASSED pre-merge (e.g. a guard on a mul result, which is + // always a number) and run the fast arm. That reroute is only + // sound if the slow chain computes exactly what the fast arm + // computes on number inputs, i.e. it is the same op sequence in + // generic form with corresponding operands (review attack F). + if (!verifyGenericTwin(r2)) return false; + // j1's instruction shape: [effect-free prefix..., guard, cond_br] const term = j1.terminator!; const guard = term.operands[0]!; @@ -514,7 +652,15 @@ function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: O outs.push(inst); }); if (!ok) return false; - if (outs.length > 0) outsideUses.set(v, outs); + if (outs.length > 0) { + // routed params are ordinary boxed joins; a RAW-typed j1 + // value (an i1/f64 prefix inst) live past j2 would need a + // raw param this pass has no business minting — refuse the + // merge (fail-closed by design: the verifier would reject + // the result anyway, we just decline up front) + if (v.type !== "any") return false; + outsideUses.set(v, outs); + } } // ---- all checks passed; mutate ---- diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index cfe2b695..33af8209 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -1398,6 +1398,148 @@ test("guard-merge: `<` diamonds still verify and keep their shape through opt", assert(countOps(fn, "lt") === 1, "lt slow path survives"); }); +// hand-build one guarded diamond: head cond_br(has_tag v) -> fast|slow, +// fast unbox/f64_mul/box, slow mul(sl, sr), join(param). Returns the +// pieces the attacks need to vary. +function buildDiamond( + fb: FunctionBuilder, + v: Inst, + slowL: Inst, + slowR: Inst, + name: string +): { join: Block; param: Inst; slowOp: Inst } { + const fast = fb.newBlock(name + "_fast"); + const slow = fb.newBlock(name + "_slow"); + const join = fb.newBlock(name + "_join"); + const param = join.addParam(name + "_p"); + const t = fb.emit("has_tag", [v], { tag: "number" }); + fb.condBr(t, fast, [], slow, []); + fb.sealBlock(fast); + fb.sealBlock(slow); + fb.setInsertPoint(fast); + const u = fb.emit("unbox_f64", [v], {}); + fb.br(join, [fb.emit("box_f64", [fb.emit("f64_mul", [u, u], {})], {})]); + fb.setInsertPoint(slow); + const slowOp = fb.emit("mul", [slowL, slowR], {}); + fb.br(join, [slowOp]); + fb.sealBlock(join); + fb.setInsertPoint(join); + return { join: join, param: param, slowOp: slowOp }; +} + +test("guard-merge: a foreign edge into region1's join refuses the merge (attack A)", () => { + // entry picks region1 or a FOREIGN edge handing j1 the unrelated + // value c. Merging would substitute region2's slow operands with + // region1's slow values — wrong on the foreign path. Must refuse. + const fb = new FunctionBuilder("attack_a", ["%env", "%this", "a", "c", "d"]); + const a = fb.readVariable("a", fb.cur); + const c = fb.readVariable("c", fb.cur); + const d = fb.readVariable("d", fb.cur); + const head1 = fb.newBlock("head1"); + const jfor = fb.newBlock("jfor"); + const td = fb.emit("has_tag", [d], { tag: "number" }); + fb.condBr(td, head1, [], jfor, []); + fb.sealBlock(head1); + fb.sealBlock(jfor); + fb.setInsertPoint(head1); + const fast1 = fb.newBlock("fast1"); + const slow1 = fb.newBlock("slow1"); + const j1 = fb.newBlock("j1"); + const p = j1.addParam("p"); + const t1 = fb.emit("has_tag", [a], { tag: "number" }); + fb.condBr(t1, fast1, [], slow1, []); + fb.sealBlock(fast1); + fb.sealBlock(slow1); + fb.setInsertPoint(fast1); + const ua = fb.emit("unbox_f64", [a], {}); + fb.br(j1, [fb.emit("box_f64", [fb.emit("f64_mul", [ua, ua], {})], {})]); + fb.setInsertPoint(slow1); + const m = fb.emit("mul", [a, a], {}); + fb.br(j1, [m]); + // the foreign edge, bypassing region1 entirely + fb.setInsertPoint(jfor); + fb.br(j1, [c]); + fb.sealBlock(j1); + fb.setInsertPoint(j1); + const r2 = buildDiamond(fb, p, p, p, "r2"); + fb.ret(r2.param); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + assert(stats.regions_merged === 0, `merge must be refused, got ${stats.regions_merged}`); + assert(r2.slowOp.operands[0] === p && r2.slowOp.operands[1] === p, "slow operands untouched"); +}); + +test("guard-merge: a non-twin slow arm refuses the merge (attack F)", () => { + // region2's fast arm computes p*p but its slow arm computes + // mul(p, e). Pre-merge the region1-slow route passes region2's + // guard (mul results are numbers) and takes the FAST arm; the merge + // would reroute it through the non-twin slow arm. Must refuse. + const fb = new FunctionBuilder("attack_f", ["%env", "%this", "a", "e"]); + const a = fb.readVariable("a", fb.cur); + const e = fb.readVariable("e", fb.cur); + const r1 = buildDiamond(fb, a, a, a, "r1"); + const r2 = buildDiamond(fb, r1.param, r1.param, e, "r2"); // slow: mul(p, e) — NOT the twin + fb.ret(r2.param); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + assert(stats.regions_merged === 0, `merge must be refused, got ${stats.regions_merged}`); +}); + +test("guard-merge: the twin shape it refuses in attack F merges when honest", () => { + // identical CFG to attack F but with the real generic twin + // (slow: mul(p, p)) — the merge must fire. Guards the twin check + // against being accidentally over-strict. + const fb = new FunctionBuilder("twin_ok", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const r1 = buildDiamond(fb, a, a, a, "r1"); + const r2 = buildDiamond(fb, r1.param, r1.param, r1.param, "r2"); + fb.ret(r2.param); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + assert(stats.regions_merged === 1, `expected the merge, got ${stats.regions_merged}`); +}); + +test("rawJoin: a fully-proven loop-carried param converts to f64", () => { + // loop header param fed box_f64 on BOTH the entry and back edges: + // structurally qualified (f64-rooted), converts, and stays sound — + // the dedicated test for the loop-carried conversion path. + const fb = new FunctionBuilder("loopraw", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const ua = fb.emit("unbox_f64", [a], {}); + const ba = fb.emit("box_f64", [ua], {}); + const header = fb.newBlock("H"); + const hp = header.addParam("s"); + const body = fb.newBlock("body"); + const out = fb.newBlock("out"); + fb.br(header, [ba]); + fb.setInsertPoint(header); + const u = fb.emit("unbox_f64", [hp], {}); + const s = fb.emit("f64_add", [u, u], {}); + const bs = fb.emit("box_f64", [s], {}); + const lt = fb.emit("f64_lt", [s, s], {}); + fb.condBr(lt, body, [], out, []); + fb.sealBlock(body); + fb.setInsertPoint(body); + fb.br(header, [bs]); + fb.sealBlock(header); + fb.sealBlock(out); + fb.setInsertPoint(out); + fb.ret(fb.emit("box_f64", [s], {})); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + assert(stats.raw_join_params === 1, `raw_join_params = ${stats.raw_join_params}`); + assert(hp.type === "f64" && hp.rawJoin, "loop param must be a marked f64 phi"); + assert(countOps(fn, "unbox_f64") === 1, "the loop-carried unbox collapses"); +}); + test("verifier: rawJoin marker admits f64 edge args into f64 params", () => { const fb = new FunctionBuilder("rawjoin", ["%env", "%this", "a"]); const a = fb.readVariable("a", fb.cur); From 5611b0d344aee580601427854478c983ac34de76 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 00:13:30 -0700 Subject: [PATCH 096/146] eir: P3.4 review round 2 -- symmetric twin verification for region1 Adversarial review round 2 found the exact mirror of attack F: the generic-twin check ran only on region2. Merge route (ii) -- region1's guards pass, region1's FAST side runs, then a region2 guard fails and is rerouted through region1's SLOW chain (whose exit values substitute into region2's slow ops) -- was covered only by the re-execution purity check, which proves the detour unobservable (operands guard-proven numbers) but not that its VALUES agree with what the fast side already produced. Attack G: region1 fast a*a vs slow mul(a,b), both operands guard-proven so purity passed; with a,b numbers and a region2 guard failure the program computed (a*b)^2 where pre-merge semantics gave (a*a)^2. Fix: verifyGenericTwin now runs on BOTH regions. Iterated merges keep passing the region1-side walk (interior former-join params resolve through slowOfBoxed's single-pred chain), with one addition the symmetric check exposed: prefix const CLONES in region1's slow chain (planted by earlier merges) must correspond to the originals the fast side references -- correspondence is SSA identity extended with same-kind/same-value consts, which denote the same value on every path. Consequence documented in-code: lt regions now never merge on either side (previously refused only as region2). Verified: attack G refuses (regions_merged=0, slow operands untouched; pinned as a unit test alongside the honest-twin control that still merges); attacks A and F still refuse; hypot2 guards_folded=4 / regions_merged=2 / raw_join_params=3 and the bench kernel 10/5/7 -- identical stats to before the fix, so the recorded measurements stand; //:test-eir 119 tests green; full matrix green; diff lane still 458 files / 0 divergent / 67 diamonds. Co-Authored-By: Claude Fable 5 --- lib/eir/optimize-guards.ts | 65 +++++++++++++++++++++++++++----------- lib/eir/tests.ts | 58 ++++++++++++++++++++++++++++++++++ 2 files changed, 104 insertions(+), 19 deletions(-) diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index ff542656..b532de81 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -76,12 +76,17 @@ // - J1's predecessors must be EXACTLY R1's exits and J2's exactly // R2's: a foreign edge into either join would make the substituted // slow values wrong (J1) or undominated (J2) on the foreign path. -// - R2's slow chain must be the GENERIC TWIN of its fast side -// (verifyGenericTwin): same arithmetic ops in the same order with -// corresponding operands and corresponding join-exit arguments. -// The reroute sends executions whose R2 guards would have PASSED -// (e.g. a guard on a mul result) through the slow chain instead of -// the fast arm; twin-ness is what makes that value-identical. +// - BOTH regions' slow chains must be the GENERIC TWIN of their fast +// sides (verifyGenericTwin, applied symmetrically): same arithmetic +// ops in the same order with corresponding operands and +// corresponding join-exit arguments. R2's twin-ness covers the +// R1-slow route that would have taken R2's fast arm; R1's twin-ness +// covers the mirrored route — R2 guard failures after R1's fast arm +// ran, rerouted through R1's slow chain (whose exit values then +// substitute into R2's slow ops). The re-execution purity check +// proves those detours unobservable; twin-ness is what proves their +// VALUES agree with the fast side. Nothing about either arm is +// assumed anymore — both are verified. // - values defined at J1 (params + the pure instruction prefix ahead // of R2's guard) that are still used beyond R2 are routed through // R2's join as new params — fast edges pass the J1 value, the slow @@ -449,9 +454,10 @@ const F64_TO_GENERIC: Record = { // j1 params / anything else -> x itself (the slow chain sees // the same SSA value; the merge's sigma rewrites j1 params later) // -// f64_lt (and hence const-boolean split arms) is refused as region2 — -// its boolean twin adds checking surface for shapes with no measured -// benefit; lt regions still merge fine as region1. +// f64_lt (and hence const-boolean split arms) is refused — the check +// runs on BOTH sides of a merge, so lt regions simply do not merge at +// all; the boolean-twin correspondence would add checking surface for +// shapes with no measured benefit (hypot2/bench stats unaffected). function verifyGenericTwin(r2: GuardRegion): boolean { if (r2.fastExitEdges.length !== 1) return false; // lt splits etc. @@ -461,6 +467,22 @@ function verifyGenericTwin(r2: GuardRegion): boolean { const pair = new Map(); // fast f64 op -> slow twin + // correspondence is SSA identity, with one extension: two const + // instructions with the same kind/value are the same value on every + // path (the merge clones pure prefix consts into the slow chain, so + // an earlier merge's region legitimately references the clone where + // the fast side references the original) + const corresponds = (want: Inst, actual: Inst | null | undefined): boolean => { + if (!actual) return false; + if (want === actual) return true; + return ( + want.op === "const" && + actual.op === "const" && + want.imms["kind"] === actual.imms["kind"] && + want.imms["value"] === actual.imms["value"] + ); + }; + const slowOfBoxed = (x: Inst, d: number): Inst | null => { if (d <= 0) return null; if (x.op === "box_f64") return slowOfF64(x.operands[0]!, d - 1); @@ -499,7 +521,7 @@ function verifyGenericTwin(r2: GuardRegion): boolean { if (tw.op !== gop) return false; for (let i = 0; i < inst.operands.length; i++) { const want = slowOfF64(inst.operands[i]!, 32); - if (!want || want !== tw.operands[i]) return false; + if (!want || !corresponds(want, tw.operands[i])) return false; } pair.set(inst, tw); } @@ -526,7 +548,7 @@ function verifyGenericTwin(r2: GuardRegion): boolean { const sa = slowExitArgs[i]; if (!fa || !sa) return false; const want = slowOfBoxed(fa, 32); - if (!want || want !== sa) return false; + if (!want || !corresponds(want, sa)) return false; } return true; } @@ -563,15 +585,20 @@ function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: O if (!r2.fastBlocks.has(src) && !r2.slowSet.has(src)) return false; } - // region2's slow chain must be the GENERIC TWIN of its fast side. - // The merge reroutes region1's slow exit straight into region2's - // slow chain — including executions where region2's guards would - // have PASSED pre-merge (e.g. a guard on a mul result, which is - // always a number) and run the fast arm. That reroute is only - // sound if the slow chain computes exactly what the fast arm - // computes on number inputs, i.e. it is the same op sequence in - // generic form with corresponding operands (review attack F). + // BOTH regions' slow chains must be the GENERIC TWIN of their fast + // sides. Region2: the merge reroutes region1's slow exit straight + // into region2's slow chain — including executions where region2's + // guards would have PASSED pre-merge (e.g. a guard on a mul result, + // which is always a number) and run the fast arm (review attack F). + // Region1, the exact mirror (review attack G): region2's guard + // failures — which happen after region1's FAST side ran — are + // rerouted through region1's slow chain, and region2's slow chain + // is rewritten against region1's SLOW values; the purity + // (re-execution) check below proves that detour unobservable, but + // only twin-ness makes its VALUES identical to what the fast side + // already produced. if (!verifyGenericTwin(r2)) return false; + if (!verifyGenericTwin(r1)) return false; // j1's instruction shape: [effect-free prefix..., guard, cond_br] const term = j1.terminator!; diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 33af8209..2e479817 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -1489,6 +1489,64 @@ test("guard-merge: a non-twin slow arm refuses the merge (attack F)", () => { assert(stats.regions_merged === 0, `merge must be refused, got ${stats.regions_merged}`); }); +test("guard-merge: a non-twin REGION1 slow arm refuses the merge (attack G)", () => { + // the mirror of attack F: region1's fast arm computes a*a but its + // slow arm computes mul(a, b) with BOTH operands guard-proven (so + // the re-execution purity check alone would pass); region2 is an + // honest twin on an unrelated c. Post-merge, a c-guard failure + // after region1's fast arm would reroute through region1's non-twin + // slow arm: (a*b)^2 instead of (a*a)^2. Must refuse. + const fb = new FunctionBuilder("attack_g", ["%env", "%this", "a", "b", "c"]); + const a = fb.readVariable("a", fb.cur); + const b = fb.readVariable("b", fb.cur); + const c = fb.readVariable("c", fb.cur); + const g2 = fb.newBlock("g2"); + const fast1 = fb.newBlock("fast1"); + const slow1 = fb.newBlock("slow1"); + const j1 = fb.newBlock("j1"); + const p = j1.addParam("p"); + const t1 = fb.emit("has_tag", [a], { tag: "number" }); + fb.condBr(t1, g2, [], slow1, []); + fb.sealBlock(g2); + fb.setInsertPoint(g2); + const t1b = fb.emit("has_tag", [b], { tag: "number" }); + fb.condBr(t1b, fast1, [], slow1, []); + fb.sealBlock(fast1); + fb.sealBlock(slow1); + fb.setInsertPoint(fast1); + const ua = fb.emit("unbox_f64", [a], {}); + fb.br(j1, [fb.emit("box_f64", [fb.emit("f64_mul", [ua, ua], {})], {})]); // a*a + fb.setInsertPoint(slow1); + const m = fb.emit("mul", [a, b], {}); // NOT the twin; operands both guard-proven + fb.br(j1, [m]); + fb.sealBlock(j1); + fb.setInsertPoint(j1); + // region2: guard the unrelated c, both arms honestly compute p*p + const fast2 = fb.newBlock("fast2"); + const slow2 = fb.newBlock("slow2"); + const j2 = fb.newBlock("j2"); + const q = j2.addParam("q"); + const t2 = fb.emit("has_tag", [c], { tag: "number" }); + fb.condBr(t2, fast2, [], slow2, []); + fb.sealBlock(fast2); + fb.sealBlock(slow2); + fb.setInsertPoint(fast2); + const up = fb.emit("unbox_f64", [p], {}); + fb.br(j2, [fb.emit("box_f64", [fb.emit("f64_mul", [up, up], {})], {})]); + fb.setInsertPoint(slow2); + const n = fb.emit("mul", [p, p], {}); + fb.br(j2, [n]); + fb.sealBlock(j2); + fb.setInsertPoint(j2); + fb.ret(q); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + assert(stats.regions_merged === 0, `merge must be refused, got ${stats.regions_merged}`); + assert(n.operands[0] === p && n.operands[1] === p, "slow operands untouched"); +}); + test("guard-merge: the twin shape it refuses in attack F merges when honest", () => { // identical CFG to attack F but with the real generic twin // (slow: mul(p, p)) — the merge must fire. Guards the twin check From 106d835fc6f3dd82c65720fee24e2477790f59b7 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 00:30:42 -0700 Subject: [PATCH 097/146] eir: P3.4 review round 3 -- Object.is const correspondence Round-3 review finding: verifyGenericTwin's const-correspondence used === on imms.value, and `0 === -0` is true -- a fast arm multiplying by const +0 and a slow arm by a distinct const -0 passed the twin check, and the rerouted slow path flipped the sign of zero (observable via 1/x, Object.is, Math.atan2). Latent (lowering and the merge's own clones copy imms bit-exactly), but verifier-clean. Fix: Object.is on the const value. This also removes a needless asymmetry in the other direction: two const-NaN instructions denote the one JS NaN and now correspond (=== refused them -- sound but over-strict). Verified: attack H refuses (regions_merged=0; the residual guard fold on the always-number mul result is the same sound class as attack F's); attacks A/F/G still refuse; hypot2 4/2/3 and the bench kernel 10/5/7 unchanged; //:test-eir 121 tests green incl. the +0/-0 refusal pin and the NaN-consts-correspond control; full matrix green; diff lane still 458 files / 0 divergent / 67 diamonds. Co-Authored-By: Claude Fable 5 --- lib/eir/optimize-guards.ts | 8 ++++-- lib/eir/tests.ts | 53 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+), 2 deletions(-) diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index b532de81..f7f692de 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -471,7 +471,11 @@ function verifyGenericTwin(r2: GuardRegion): boolean { // instructions with the same kind/value are the same value on every // path (the merge clones pure prefix consts into the slow chain, so // an earlier merge's region legitimately references the clone where - // the fast side references the original) + // the fast side references the original). Value equality must be + // Object.is, not ===: `0 === -0` would conflate the two zeros (a + // sign flip observable via 1/x — review attack H), while NaN + // consts — which === would needlessly refuse — all denote the one + // JS NaN and correspond. const corresponds = (want: Inst, actual: Inst | null | undefined): boolean => { if (!actual) return false; if (want === actual) return true; @@ -479,7 +483,7 @@ function verifyGenericTwin(r2: GuardRegion): boolean { want.op === "const" && actual.op === "const" && want.imms["kind"] === actual.imms["kind"] && - want.imms["value"] === actual.imms["value"] + Object.is(want.imms["value"], actual.imms["value"]) ); }; diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 2e479817..a563d676 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -12,6 +12,7 @@ import { printFunction, printModule } from "./printer"; import { verifyFunction, verifyModule } from "./verifier"; import { lowerFunctionNode, lowerProgram } from "./lower"; import { optimizeFunction } from "./optimize"; +import type { OptStats } from "./optimize"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; @@ -1547,6 +1548,58 @@ test("guard-merge: a non-twin REGION1 slow arm refuses the merge (attack G)", () assert(n.operands[0] === p && n.operands[1] === p, "slow operands untouched"); }); +// attack-H family: region1 an honest twin on `a`; region2 guards its +// param p and multiplies p by a const materialized SEPARATELY in each +// arm. With corresponding consts the merge must fire; with +0 vs -0 it +// must refuse (sign of zero is observable via 1/x). +function buildConstPairShape( + fastConst: number, + slowConst: number +): { fn: Func; stats: OptStats } { + const fb = new FunctionBuilder("constpair", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const r1 = buildDiamond(fb, a, a, a, "r1"); + const p = r1.param; + const fast2 = fb.newBlock("fast2"); + const slow2 = fb.newBlock("slow2"); + const j2 = fb.newBlock("j2"); + const q = j2.addParam("q"); + const t2 = fb.emit("has_tag", [p], { tag: "number" }); + fb.condBr(t2, fast2, [], slow2, []); + fb.sealBlock(fast2); + fb.sealBlock(slow2); + fb.setInsertPoint(fast2); + const cf = fb.emit("const", [], { kind: "number", value: fastConst }); + const uc = fb.emit("unbox_f64", [cf], {}); + const up = fb.emit("unbox_f64", [p], {}); + fb.br(j2, [fb.emit("box_f64", [fb.emit("f64_mul", [uc, up], {})], {})]); + fb.setInsertPoint(slow2); + const cs = fb.emit("const", [], { kind: "number", value: slowConst }); + fb.br(j2, [fb.emit("mul", [cs, p], {})]); + fb.sealBlock(j2); + fb.setInsertPoint(j2); + fb.ret(q); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + return { fn: fn, stats: stats }; +} + +test("guard-merge: const +0 does not correspond to const -0 (attack H)", () => { + // === would conflate the zeros; the rerouted slow path would flip + // the sign of zero (1/x: Infinity vs -Infinity). Must refuse. + const { stats } = buildConstPairShape(0, -0); + assert(stats.regions_merged === 0, `merge must be refused, got ${stats.regions_merged}`); +}); + +test("guard-merge: distinct NaN consts correspond (one JS NaN)", () => { + // the flip side of Object.is: two const-NaN instructions denote the + // same value on every path, so the honest twin merges + const { stats } = buildConstPairShape(NaN, NaN); + assert(stats.regions_merged === 1, `expected the merge, got ${stats.regions_merged}`); +}); + test("guard-merge: the twin shape it refuses in attack F merges when honest", () => { // identical CFG to attack F but with the real generic twin // (slow: mul(p, p)) — the merge must fire. Guards the twin check From 10959e9464901b2ee8795262a397f7f4559048bc Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 12:27:03 -0700 Subject: [PATCH 098/146] eir: bump echojs-maam -- P3.5 differential harness + exact concrete intrinsics Submodule ejs-integration 8d6a157 -> c69fc81: the Phase 3.5 deliverable. `npm run diff-harness` in the maam repo runs a 40-file closed-world corpus through the concrete interpreter and diffs value-level results against node (33 exact, 3 membership, 0 divergences), checks abstract typeOfNode containment against the echojs oracle spec and its intrinsics twin (1799 node checks, 0 violations), and byte-compares ejs-compiled output for the subset both support (28 ok, 7 known-divergent). Wired into new maam CI; the ejs lane runs only in a dev tree (MAAM_DIFF_EJS_TREE) and skips loudly elsewhere. The harness found and maam fixed: a hoisted-function capture unsoundness (closure writes to later-declared same-scope vars were silently dropped -- an oracle miscompile risk for P3.6 unguarded consumption), confident- undefined reads off bottom receivers (Math.PI under the intrinsics-off oracle config), numeric string relationals, ToNumber(null)=NaN, and string .length reading as undefined. It also surfaced seven pre-existing echojs runtime bugs (typeof null, -0===0, Math.round(-2.5), Number whitespace, negative >>>, `1+null` runtime abort, esprima `**` gap), root-caused and pinned in the maam repo's ejs-known-divergences.json with a stale-entry gate. P3.5 checkbox ticked in docs/maam-plan.md; full numbers and the comparison-semantics writeup in docs/maam-p0-results.md "Phase 3.5". Parent gates: npx tsc -p . clean, buck2 build //:test-eir green (flag-off pipeline untouched -- maam is only consumed under --types). Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 105 ++++++++++++++++++++++++++++++++++++++ docs/maam-plan.md | 15 +++++- external-deps/echojs-maam | 2 +- 3 files changed, 120 insertions(+), 2 deletions(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index ef8742a3..79652762 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -536,3 +536,108 @@ front); the loop-carried rawJoin conversion (a fully-proven f64 loop param) gained a dedicated unit test; ir.ts's rawJoin comment now states the actual contract (structural qualification, verifier-checked — not provenance-linked). + +# Phase 3.5 — differential harness (concreteEval vs node vs ejs) + +Date: 2026-07-23. echojs @ eir (P3.4 head), maam @ c69fc81. Deliverable +lives in the maam repo: `test/differential/harness.ts` + a 40-file +closed-world corpus, run by `npm run diff-harness` and wired into the new +maam CI workflow (`.github/workflows/ci.yml`, node pinned 22.4.0). The +concrete interpreter — `analyze(prog, concreteEval() + intrinsics)` — is the +reference semantics; the harness diffs it against node, against +ejs-compiled output, and against the abstract oracle configs. + +## Comparison semantics (the deliberate choices) + +The corpus convention is that a file's last top-level statement is an +ExpressionStatement; its value is the file's *final value* (for that shape +it coincides with the completion value). Comparison is **value-level**, +not host-stringification: the harness wraps that expression in an injected +ES5 renderer (−0 renders `"-0"`, NaN `"NaN"`, strings escaped by hand) and +the same renderer is applied to the concrete CVals, so number→string is +the identical algorithm on both sides. node's printed value must be a +MEMBER of the concrete result set; singletons must match exactly. +Documented blind spots: object/function finals compare by type only +(corpus files project structure into primitives), and non-singleton sets — +from the machine's two deliberate over-approximations, the smashed array +`elements` bucket and the always-reachable nondet catch handler — are +reported as PASS-CONTAINS, never silently. Analysis runs per file in a +worker subprocess under a 30 s budget: genuine concrete-machine divergence +(nondet for-of/for-in × unbounded concrete time) becomes a *visible* skip. + +## Gate results + +- Corpus 40 files. node lane: **33 exact, 3 membership, 0 divergences**; + 4 skips, all deliberate and printed with reasons (Math.random + nondeterminism; array prototype methods degrade under the concrete + domain; two files that prove the for-of/for-in divergence timeout path). +- Containment lane: **1799 node checks, 0 violations** across two abstract + configs — the echojs oracle spec verbatim + (`kCFA(1, flow-sensitive, call-site, shapeCap=64, stateCap=512)`) and the + same + `intrinsics: true`. Checked-node set: every source node BOTH the + concrete and the abstract run map (the concrete entries are exactly what + a real execution produced). 57 concrete-mapped nodes were unmapped + abstractly (dead-path degradation), counted, not failures. +- ejs lane (dev tree only; `MAAM_DIFF_EJS_TREE` = a stage0 work tree — + `//:srcdir-tree` copy + `lib/generated`; the lane skips loudly when + unset, e.g. in maam CI): **28 ok, 1 N/A, 7 known-divergent, 0 new**. + +## What the harness found (the product) + +Fixed in maam (each with a pinned test; suite 241 → 258): + +1. **Hoisted-function capture unsoundness** — a hoisted function's body + referencing a `var` declared later in the same statement list left the + name un-renamed; closure writes silently missed the binding + (`var n = 0; function s(){ n = "x"; } s(); n` reported `num` — a + ⊑-violation an unguarded consumer would miscompile on). normStmts now + pre-mints captured names, pre-binds them to `undefined` above the + letrec, and turns their declarations into `setVar` writes. +2. **⊥-receiver property reads fabricated `undefined`** — with intrinsics + off, `Math.PI` read as a *confident* undefined (the containment lane + caught this as `num ⋢ undefined`). ⊥ receivers now propagate ⊥. +3. **String relational comparison was numeric** — `"a" < "b"` was false. +4. **ToNumber(null) was NaN in binops** — `1 + null` computed NaN, JS says 1. +5. **`s.length` read as confident undefined in both domains** — now exact + under the concrete domain, `anyNum` abstractly, ungated from the + intrinsics knob (the echojs oracle runs intrinsics-off). + Plus: `Infinity`/`NaN` identifiers were unbound (path-killing ⊥); they + are dialect literals now. + +Also built: exact concrete intrinsics — the plan's `intrinsics: true` +silently degraded under the concrete domain (seeded globals were ⊥). The +domain gained an optional `concretize` capability whose presence is the +exactness contract: pure-primitive intrinsics compute their real JS result +or the call degrades visibly through `unknownCalls`; summary models never +run concretely. + +Found in echojs, root-caused by minimal probes, recorded in +`ejs-known-divergences.json` (a listed file that *stops* diverging fails +the gate as stale, so the list can only shrink by fixing echojs): + +1. `typeof null` → `"null"` (spec: `"object"`). +2. `-0 === 0` → false (NaN-boxed bit comparison; `1/-0` is correct). +3. `Math.round(-2.5)` → −3 (C `round()` half-away-from-zero; JS: −2). +4. `Number(" 7 ")` → NaN (ToNumber(string) does not trim whitespace). +5. `-8 >>> 28` → 0 (ToUint32 on negative shift operands). +6. `1 + null` → runtime abort (`ejsval ToNumber(ejsval)`, + runtime/ejs-ops.c:260 "not implemented", exit 134). +7. esprima cannot parse `**` (arith-basic.js is the lane's one N/A). + +## Known model limits (documented, visible, tracked) + +- try/catch: handler modeled as always-reachable nondet with a ⊤ caught + value (sound over-approximation; membership-checked). `return` through + `finally` skips the finalizer in the model — corpus avoids the shape. +- `F.prototype = Object.create(...)` (prototype REASSIGNMENT) is + unmodeled and degrades visibly; the dialect shape is + `Object.setPrototypeOf`, which is modeled. +- for-of/for-in accumulation diverges under concrete time (nondet + iteration); the harness's worker timeout makes it a visible skip. +- Nested-block `var` hoisting and hoisted-function capture of + destructuring-pattern leaves are not modeled by the P3.5 normalizer fix. +- Captured-by-hoisted-function vars now (correctly) include `undefined` + in their nodeTypes join from the hoisted pre-binding; non-captured vars + are unaffected. The `--types` diff lane was not re-run for this bump + (flag-off behavior is untouched); diamond counts on captured-var + arithmetic may shift in the sound (declining) direction. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index e5339898..1e52e15e 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -493,9 +493,22 @@ Smaller forward items surfaced by the Chunk A integration review: boxing once); types-bench1 + the hypot2 demo re-measured, deltas vs the Phase 3 baselines recorded in docs/maam-p0-results.md "Phase 3.4 gates". -- [ ] **P3.5** differential harness in maam repo (`concreteEval` vs node vs +- [x] **P3.5** differential harness in maam repo (`concreteEval` vs node vs ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. + Landed as maam test/differential/ (`npm run diff-harness`, in maam CI): + 40-file corpus, node lane 33 exact + 3 membership (documented machine + over-approximations) + 4 visible skips, 0 divergences; containment + lane 1799 node checks against the oracle spec and its intrinsics twin, + 0 violations; ejs lane 28 ok / 7 known-divergent — seven root-caused + PRE-EXISTING echojs bugs (typeof null, -0===0, Math.round(-2.5), + Number whitespace, negative >>>, `1+null` runtime abort, esprima `**`) + pinned in ejs-known-divergences.json with a stale-entry gate. + Building the harness required making `intrinsics: true` actually exact + under the concrete domain (it silently degraded before) and fixed + five machine/normalizer bugs the diff surfaced, incl. a hoisted- + function capture unsoundness that dropped closure writes — details in + docs/maam-p0-results.md "Phase 3.5". - [ ] **P3.6** typed calling convention / function specialization (see the Phase 3.6 section; HARD PRECONDITION: P3.5 green): local-closed-world escape analysis, specialized unboxed clones + diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index 8d6a1575..c69fc814 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit 8d6a15751e198cd1f87bc16321acefae434d1c6e +Subproject commit c69fc814a4b6202bcfd47ab6fe1064983e5122f4 From 3430bb1f5f01dfa487901b08ddcbd01268c166e7 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 14:53:41 -0700 Subject: [PATCH 099/146] eir: bump echojs-maam -- P3.5 review round 2 (capture generalized to all closures) Submodule ejs-integration c69fc81 -> 3e64ca1, addressing the adversarial review of the P3.5 harness commit: - F1 (the blocker): the hoisted-capture fix covered FunctionDeclarations only; function expressions / arrows / object-literal methods created before a later same-scope var still dropped writes silently (a mapped-and-wrong oracle fact). Capture detection is now a syntactic, positional, over-approximate scan over ALL function-creating subtrees; three new corpus probes PASS exactly. - F2: unmodeled nested-block var capture now counts as a degradedBinding (visible skip), never a silent bottom computation. - F3: unit pins independent of the harness for every normalizer/machine fix (suite 258 -> 266). - F4/F6: known-divergences entries structured ({symptom, rootCause}, enforced) and accounted for even when unvalidatable (compile-N/A / skipped / missing files warned by name); compound-assignment corpus file added (esprima-clean, full three-lane coverage). Final harness numbers (maam 3e64ca1, all lanes): corpus 45 -- node lane 37 exact + 3 membership + 5 visible skips, 0 divergences; containment 1935 checks, 0 violations; ejs lane 32 ok / 1 N/A / 7 known-divergent / 0 new / 0 stale. Item 8: the --types diff lane re-run on this pin: 458 files, 457 functionally identical (454 in-lane + 3 transient concurrency timeouts re-verified identical serially), 0 divergent, 1 N/A (tester.js). Diamonds 69 (baseline 67), oracleUnknown 866 (baseline 1035) -- the soundness fixes bought precision, not lost it. Numbers supersede the Phase 3 figures; recorded in docs/maam-p0-results.md "Phase 3.5". Parent gates: npx tsc -p . clean, buck2 build //:test-eir green. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 136 ++++++++++++++++++++++++++++++++------ docs/maam-plan.md | 26 ++++---- external-deps/echojs-maam | 2 +- 3 files changed, 129 insertions(+), 35 deletions(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index 79652762..8542b71f 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -539,7 +539,10 @@ provenance-linked). # Phase 3.5 — differential harness (concreteEval vs node vs ejs) -Date: 2026-07-23. echojs @ eir (P3.4 head), maam @ c69fc81. Deliverable +Date: 2026-07-23. echojs @ eir (P3.4 head), maam @ c69fc81, revised same +day to maam @ 3e64ca1 after adversarial review (the "Review round 2" +subsection below records what changed; numbers in this section are the +FINAL 3e64ca1 figures). Deliverable lives in the maam repo: `test/differential/harness.ts` + a 40-file closed-world corpus, run by `npm run diff-harness` and wired into the new maam CI workflow (`.github/workflows/ci.yml`, node pinned 22.4.0). The @@ -567,32 +570,53 @@ worker subprocess under a 30 s budget: genuine concrete-machine divergence ## Gate results -- Corpus 40 files. node lane: **33 exact, 3 membership, 0 divergences**; - 4 skips, all deliberate and printed with reasons (Math.random +- Corpus 45 files. node lane: **37 exact, 3 membership, 0 divergences**; + 5 skips, all deliberate and printed with reasons (Math.random nondeterminism; array prototype methods degrade under the concrete - domain; two files that prove the for-of/for-in divergence timeout path). -- Containment lane: **1799 node checks, 0 violations** across two abstract + domain; two files that prove the for-of/for-in divergence timeout path; + one that proves the nested-block-var visible degradation). The + differential lane exercises **zero iteration-protocol semantics** — + for-of/for-in are exactly the skip files, because their nondet iteration + never converges under unbounded concrete time. +- Containment lane: **1935 node checks, 0 violations** across two abstract configs — the echojs oracle spec verbatim (`kCFA(1, flow-sensitive, call-site, shapeCap=64, stateCap=512)`) and the same + `intrinsics: true`. Checked-node set: every source node BOTH the concrete and the abstract run map (the concrete entries are exactly what - a real execution produced). 57 concrete-mapped nodes were unmapped - abstractly (dead-path degradation), counted, not failures. + a real execution produced). **Census of the exempt remainder** (57 + concrete-mapped nodes unmapped abstractly, summed over both configs; the + harness prints the count so growth is visible): these are NOT all dead + code — under config A (intrinsics off) they include LIVE coercion + arithmetic whose receiver/operand chain passes through an unbound global + (`Math.PI * 2 * 2`, `Number.MAX_VALUE * 2`) plus coercion forms the + normalizer maps but config A's ⊥-receiver paths kill (`true+1`, `""-1`, + `-"3"`, `+true` in the coercion files). Honest reading: the oracle + currently produces NO facts for such nodes (fail-soft ⊤ at the + consumer), so containment there is vacuous — they are exempt, not + verified. - ejs lane (dev tree only; `MAAM_DIFF_EJS_TREE` = a stage0 work tree — `//:srcdir-tree` copy + `lib/generated`; the lane skips loudly when - unset, e.g. in maam CI): **28 ok, 1 N/A, 7 known-divergent, 0 new**. + unset, e.g. in maam CI): **32 ok, 1 N/A (esprima `**` family), 7 + known-divergent, 0 new, 0 stale**. ## What the harness found (the product) Fixed in maam (each with a pinned test; suite 241 → 258): -1. **Hoisted-function capture unsoundness** — a hoisted function's body - referencing a `var` declared later in the same statement list left the - name un-renamed; closure writes silently missed the binding - (`var n = 0; function s(){ n = "x"; } s(); n` reported `num` — a - ⊑-violation an unguarded consumer would miscompile on). normStmts now - pre-mints captured names, pre-binds them to `undefined` above the - letrec, and turns their declarations into `setVar` writes. +1. **Closure-capture unsoundness** — a closure created textually at or + before a variable's declaration in the same statement list (a hoisted + function declaration — and, per review round 2, equally a function + expression, arrow, or object-literal method) referencing that variable + left the name un-renamed; closure writes silently missed the binding + (`var f = function () { n = "x"; }; var n = 0; f(); n` reported `num` + with zero degradation — a mapped-and-wrong oracle fact an unguarded + consumer would miscompile on). normStmts now detects capture with a + syntactic over-approximate scan over ALL function-creating subtrees, + positionally (capture at statement i ≤ declaration j), pre-binds + captured names to `undefined` above everything, and turns their + declarations into `setVar` writes. Declare-then-capture shapes keep + the precise fresh-binding path (no `undefined` widening), pinned by a + typeOfNode unit test. 2. **⊥-receiver property reads fabricated `undefined`** — with intrinsics off, `Math.PI` read as a *confident* undefined (the containment lane caught this as `num ⋢ undefined`). ⊥ receivers now propagate ⊥. @@ -634,10 +658,78 @@ the gate as stale, so the list can only shrink by fixing echojs): `Object.setPrototypeOf`, which is modeled. - for-of/for-in accumulation diverges under concrete time (nondet iteration); the harness's worker timeout makes it a visible skip. -- Nested-block `var` hoisting and hoisted-function capture of - destructuring-pattern leaves are not modeled by the P3.5 normalizer fix. -- Captured-by-hoisted-function vars now (correctly) include `undefined` - in their nodeTypes join from the hoisted pre-binding; non-captured vars - are unaffected. The `--types` diff lane was not re-run for this bump - (flag-off behavior is untouched); diamond counts on captured-var - arithmetic may shift in the sound (declining) direction. +- Nested-block `var` hoisting is not modeled; when such a var is captured + by a function in the enclosing scope the normalizer now COUNTS it as a + degraded binding (review F2), so the harness precondition trips and the + file skips visibly instead of computing on ⊥. Captured + destructuring-pattern leaves and re-declared (`var x` twice) captures + remain unmodeled and keep the old behavior. +- Captured-by-closure vars now (correctly) include `undefined` in their + nodeTypes join from the hoisted pre-binding; non-captured and + declare-then-capture vars are unaffected. Oracle-fact impact measured + by the `--types` diff lane re-run below. + +## Review round 2 (adversarial pass over the harness commit) + +The review confirmed the harness mechanics (wrap seam, gate teeth under +perturbation, sigLeq, ejs-lane authenticity, CI viability) and rejected on +one confirmed HIGH finding plus process items; all addressed at maam +3e64ca1: + +- **F1 (the blocker): capture fix was FunctionDeclaration-only.** A + closure created textually at-or-before a later same-scope `var` via a + function expression / arrow / object-literal method still dropped its + writes silently — concrete `{num 0}` with zero degradation for + `var f = function () { n = "x"; }; var n = 0; f(); n;` while node says + "x", and the oracle reported a mapped-and-wrong `num`. Fixed by + replacing the compiled-freeVars detection with a syntactic + over-approximate scan over ALL function-creating subtrees (positional: + capture at statement i ≤ declaration j; declarations count as i = −1). + Three corpus probes (capture-fnexpr/arrow/objmethod.js) now PASS + exactly — the fix computes, it does not degrade. +- **F2: nested-block `var` capture now counts.** Previously concrete ⊥ + with zero accounting; the normalizer pushes a degradedBinding so the + harness skip precondition trips (skip-nested-var-capture.js proves it). +- **F3: unit pins independent of the harness** (review showed reverting + normalize.ts kept all 258 then-tests green): hoisted/expression/arrow/ + method capture, declare-then-capture precision (typeOfNode stays exact + `num`), nested-var visible degradation, bare NaN / Infinity literals, + and the ⊥-receiver read, each flipping if its fix is reverted. Suite + 258 → 266. +- **F4: known-divergence entries participate in staleness even when + unvalidatable** — a listed file that goes compile-N/A, is skipped, or + leaves the corpus is warned about by name (warning, not hard failure: + N/A means the run-behavior claim cannot be tested in either direction, + and hard-failing would let an esprima parse gap flip a semantics gate). + Entries are now structured ({symptom, rootCause}, enforced). +- **F5: the containment-exempt census is documented above** (the + 57-node remainder includes live coercion arithmetic under config A — + exempt, not verified — with the count printed every run). +- **F6: compound assignments corpus file added** (esprima-clean, so it + has full three-lane coverage; the `**` family lives in the expected-N/A + arith-basic.js); the zero-iteration-protocol statement is in the gate + results above. + +Final harness numbers at 3e64ca1 (all lanes): corpus 45 — node 37 exact + +3 membership + 5 visible skips, 0 divergences; containment 1935 checks, 0 +violations; ejs 32 ok / 1 N/A / 7 known / 0 new / 0 stale. + +## The `--types` diff lane re-run (oracle facts changed ⇒ re-measured) + +The P3.5 normalizer/machine fixes change what the oracle reports, so the +lane was re-run on the final pin (maam 3e64ca1; work tree assembled from +`//:srcdir-tree` + `//lib:generated` + repo `test/`, conc 4, logs +`~/.cache/maam-p0-logs/P35-types-diff/`). These numbers SUPERSEDE the +Phase 3 figures (67 diamonds / 1319 queries / 1035 unknown) and the +review's interim c69fc81 run (66 / 1306 / 866): + +| files | identical | divergent | N/A | timeouts | +|---|---|---|---|---| +| 458 | 454 (+3 serial re-verifies = 457) | **0** | 1 (tester.js, standing esprima gap) | 3 transient (closure2/4/7, concurrency artifact — each re-verified IDENTICAL serially, same as the review run's 4) | + +Aggregates: **diamonds 69** (baseline 67, interim 66), oracleQueries 1320, +**oracleUnknown 866** (baseline 1035). Reading: the ⊥-receiver fix and +exact string `.length` give the oracle MORE precise facts (unknown down +~16%, two extra diamonds); the hoisted-capture `undefined` widening on +captured vars did not cost a diamond on this corpus. The behavioral gate +is unchanged: zero divergence, flag-off untouched. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 1e52e15e..b28d0596 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -497,18 +497,20 @@ Smaller forward items surfaced by the Chunk A integration review: ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. Landed as maam test/differential/ (`npm run diff-harness`, in maam CI): - 40-file corpus, node lane 33 exact + 3 membership (documented machine - over-approximations) + 4 visible skips, 0 divergences; containment - lane 1799 node checks against the oracle spec and its intrinsics twin, - 0 violations; ejs lane 28 ok / 7 known-divergent — seven root-caused - PRE-EXISTING echojs bugs (typeof null, -0===0, Math.round(-2.5), - Number whitespace, negative >>>, `1+null` runtime abort, esprima `**`) - pinned in ejs-known-divergences.json with a stale-entry gate. - Building the harness required making `intrinsics: true` actually exact - under the concrete domain (it silently degraded before) and fixed - five machine/normalizer bugs the diff surfaced, incl. a hoisted- - function capture unsoundness that dropped closure writes — details in - docs/maam-p0-results.md "Phase 3.5". + 45-file corpus, node lane 37 exact + 3 membership (documented machine + over-approximations) + 5 visible skips, 0 divergences; containment + lane 1935 node checks against the oracle spec and its intrinsics twin, + 0 violations; ejs lane 32 ok / 1 N/A / 7 known-divergent — seven + root-caused PRE-EXISTING echojs bugs (typeof null, -0===0, + Math.round(-2.5), Number whitespace, negative >>>, `1+null` runtime + abort, esprima `**`) pinned in ejs-known-divergences.json with + stale/unvalidatable-entry accounting. Building the harness required + making `intrinsics: true` actually exact under the concrete domain + (it silently degraded before) and fixed the machine/normalizer bugs + the diff surfaced — chiefly a closure-capture unsoundness (writes to + later-declared same-scope vars silently dropped; generalized to + function expressions/arrows/methods after adversarial review) — + details in docs/maam-p0-results.md "Phase 3.5". - [ ] **P3.6** typed calling convention / function specialization (see the Phase 3.6 section; HARD PRECONDITION: P3.5 green): local-closed-world escape analysis, specialized unboxed clones + diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index c69fc814..3e64ca10 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit c69fc814a4b6202bcfd47ab6fe1064983e5122f4 +Subproject commit 3e64ca1036bb202b2f2e8232ae287c1cbb0f3d64 From b193e2a936d5ea79d4e46d31f8d2b77378de1484 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 15:35:51 -0700 Subject: [PATCH 100/146] eir: bump echojs-maam -- P3.5 nits: pattern-leaf capture accounting + defaults scan Submodule ejs-integration 3e64ca1 -> c3d1aed, closing the round-3 review nits: - R1: destructuring-pattern leaves captured by a closure created at-or-before their declaration were still silently wrong with zero counters (concrete 1 vs real JS 9 on the reviewer's repro). Same remedy as the nested-block case: counted as degradedBindings, so the harness precondition trips (skip-pattern-leaf-capture.js proves the visible skip); declare-then-capture leaves pinned as non-degrading. - R2: the capture scan now covers old-esprima/echojs-dialect `defaults` expressions and dialect `rest` params (unreachable via acorn, reachable through post-desugar trees), with param BINDING names collected via pattern leaves. Pinned with a hand-built dialect tree. - Stale doc claim fixed: re-declared (`var x` twice) captures ARE modeled. maam suite 268; harness at c3d1aed (all lanes): corpus 46 -- node 37 exact + 3 membership + 6 visible skips, 0 divergences; containment 1935 checks, 0 violations; ejs 32 ok / 1 N/A (esprima `**`) / 7 known / 0 new / 0 stale. --types lane re-run on this pin: 458 files, 457 identical, 0 divergent, 1 N/A (tester.js), 0 timeouts, aggregates unchanged (diamonds 69 / queries 1320 / unknown 866) -- R1/R2 changed no oracle facts on the echojs corpus. Parent gates: npx tsc -p . clean, buck2 build //:test-eir green. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 53 ++++++++++++++++++++++++++++++++------- docs/maam-plan.md | 4 +-- external-deps/echojs-maam | 2 +- 3 files changed, 47 insertions(+), 12 deletions(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index 8542b71f..2ee528fd 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -540,9 +540,9 @@ provenance-linked). # Phase 3.5 — differential harness (concreteEval vs node vs ejs) Date: 2026-07-23. echojs @ eir (P3.4 head), maam @ c69fc81, revised same -day to maam @ 3e64ca1 after adversarial review (the "Review round 2" -subsection below records what changed; numbers in this section are the -FINAL 3e64ca1 figures). Deliverable +day to maam @ 3e64ca1 (review round 2) and maam @ c3d1aed (round-3 nits +R1/R2; the review subsections below record what changed — numbers in this +section are the FINAL c3d1aed figures). Deliverable lives in the maam repo: `test/differential/harness.ts` + a 40-file closed-world corpus, run by `npm run diff-harness` and wired into the new maam CI workflow (`.github/workflows/ci.yml`, node pinned 22.4.0). The @@ -570,11 +570,12 @@ worker subprocess under a 30 s budget: genuine concrete-machine divergence ## Gate results -- Corpus 45 files. node lane: **37 exact, 3 membership, 0 divergences**; - 5 skips, all deliberate and printed with reasons (Math.random +- Corpus 46 files. node lane: **37 exact, 3 membership, 0 divergences**; + 6 skips, all deliberate and printed with reasons (Math.random nondeterminism; array prototype methods degrade under the concrete domain; two files that prove the for-of/for-in divergence timeout path; - one that proves the nested-block-var visible degradation). The + one each proving the nested-block-var and pattern-leaf-capture visible + degradations). The differential lane exercises **zero iteration-protocol semantics** — for-of/for-in are exactly the skip files, because their nondet iteration never converges under unbounded concrete time. @@ -661,9 +662,12 @@ the gate as stale, so the list can only shrink by fixing echojs): - Nested-block `var` hoisting is not modeled; when such a var is captured by a function in the enclosing scope the normalizer now COUNTS it as a degraded binding (review F2), so the harness precondition trips and the - file skips visibly instead of computing on ⊥. Captured - destructuring-pattern leaves and re-declared (`var x` twice) captures - remain unmodeled and keep the old behavior. + file skips visibly instead of computing on ⊥. Destructuring-pattern + LEAVES captured at-or-before their declaration are likewise unmodeled + and, without the round-3 accounting, were SILENTLY WRONG (writes + dropped, zero counters) — they now count as degraded bindings too + (review R1). Re-declared (`var x` twice) captures ARE modeled: both + declarations assign the one pre-minted binding. - Captured-by-closure vars now (correctly) include `undefined` in their nodeTypes join from the hoisted pre-binding; non-captured and declare-then-capture vars are unaffected. Oracle-fact impact measured @@ -714,6 +718,30 @@ Final harness numbers at 3e64ca1 (all lanes): corpus 45 — node 37 exact + 3 membership + 5 visible skips, 0 divergences; containment 1935 checks, 0 violations; ejs 32 ok / 1 N/A / 7 known / 0 new / 0 stale. +## Review round 3 (nits R1/R2, maam c3d1aed) + +- **R1**: destructuring-pattern leaves captured at-or-before their + declaration were still silently wrong with zero counters + (`var f = function () { a = 9; }; var [a, b] = [1, 2]; f(); a;` → + concrete 1, real JS 9). Same remedy as F2: the normalizer records a + degradedBinding (harness precondition trips; skip-pattern-leaf-capture.js + proves the visible skip; declare-then-capture leaves pinned as + non-degrading; identifier-declared names excluded — the modeled path + owns them). Suite 266 → 268; corpus 45 → 46. +- **R2**: the capture scan early-returned after params + body, missing + closures inside old-esprima/echojs-dialect `defaults` expressions — + unreachable via acorn but reachable through echojs post-desugar trees. + The scan now covers `defaults`, treats dialect `rest` as a parameter, + and collects param BINDING names via pattern leaves (an ES6 default's + right-hand side is an expression, not a binding). Pinned with a + hand-built dialect tree (a default-closure writing a later var now + computes, instead of silently dropping the write). + +Final harness numbers at c3d1aed (all lanes): corpus 46 — node 37 exact ++ 3 membership + 6 visible skips, 0 divergences; containment 1935 +checks, 0 violations; ejs 32 ok / 1 N/A (arith-basic.js, esprima `**`) / +7 known / 0 new / 0 stale. Suite 268. + ## The `--types` diff lane re-run (oracle facts changed ⇒ re-measured) The P3.5 normalizer/machine fixes change what the oracle reports, so the @@ -733,3 +761,10 @@ exact string `.length` give the oracle MORE precise facts (unknown down ~16%, two extra diamonds); the hoisted-capture `undefined` widening on captured vars did not cost a diamond on this corpus. The behavioral gate is unchanged: zero divergence, flag-off untouched. + +Re-run once more on the round-3 pin (maam c3d1aed, logs +`~/.cache/maam-p0-logs/P35-types-diff-r3/`): **458 files, 457 identical, +0 divergent, 1 N/A (tester.js), 0 timeouts — LANE PASS**, aggregates +byte-for-byte the same (diamonds 69 / queries 1320 / unknown 866): the +R1 accounting and R2 defaults-scan changed no oracle facts on this +corpus. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index b28d0596..ab048dd1 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -497,8 +497,8 @@ Smaller forward items surfaced by the Chunk A integration review: ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. Landed as maam test/differential/ (`npm run diff-harness`, in maam CI): - 45-file corpus, node lane 37 exact + 3 membership (documented machine - over-approximations) + 5 visible skips, 0 divergences; containment + 46-file corpus, node lane 37 exact + 3 membership (documented machine + over-approximations) + 6 visible skips, 0 divergences; containment lane 1935 node checks against the oracle spec and its intrinsics twin, 0 violations; ejs lane 32 ok / 1 N/A / 7 known-divergent — seven root-caused PRE-EXISTING echojs bugs (typeof null, -0===0, diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index 3e64ca10..c3d1aed5 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit 3e64ca1036bb202b2f2e8232ae287c1cbb0f3d64 +Subproject commit c3d1aed5041a75681f69b762015adb06f3e654c2 From 63379bcb69d8e4a688b8d3d5a9558c7e4f046517 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 15:45:29 -0700 Subject: [PATCH 101/146] eir: bump echojs-maam -- P3.5 round 4: binding-split re-declarations counted Submodule ejs-integration c3d1aed -> dfa8eb1: the round-4 residual. A pattern re-declaration of a hoisted-captured variable split the binding silently (reviewer repro answered {undefined,1} vs real JS 5, zero counters). Fixed accounting-only -- the modeled captured rule is unchanged by construction, only degradedBindings entries are added -- covering the reviewer repro plus two sibling split shapes found while generalizing (identifier re-declaration after a non-hoisted capture; pattern-only re-declaration after capture). Hoisted-captured identifier re-declaration remains modeled (pinned, db=0). Suite 269; harness node+containment numbers byte-identical to c3d1aed (corpus 46, 37+3, 6 skips, 0 divergences; 1935 checks, 0 violations). --types lane not re-run: counters only, no typeOfNode fact can differ by construction. Parent gates: npx tsc -p . clean, buck2 build //:test-eir green. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 20 ++++++++++++++++++++ external-deps/echojs-maam | 2 +- 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index 2ee528fd..50195fdf 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -742,6 +742,26 @@ Final harness numbers at c3d1aed (all lanes): corpus 46 — node 37 exact checks, 0 violations; ejs 32 ok / 1 N/A (arith-basic.js, esprima `**`) / 7 known / 0 new / 0 stale. Suite 268. +## Review round 4 (residual: binding-split re-declarations, maam dfa8eb1) + +The R1 identifier-declared exclusion assumed the modeled path owned such +names, but a later PATTERN re-declaration of a hoisted-captured name +fresh-binds while the closure writes the pre-minted address — a binding +SPLIT, silently wrong with zero counters (reviewer repro +`var f = function () { a = 5; }; var a = 0; var [a] = [1]; f(); a;` → +{undefined, 1}, real JS 5). Fixed ACCOUNTING-ONLY (the modeled +`captured` rule is unchanged — asserted, and the harness node+containment +numbers are byte-identical): the scan records per-name identifier and +pattern-leaf declaration index lists plus the earliest closure-reference +position, and degrades every split shape — the reviewer repro, the +identifier-only sibling (re-declaration after a non-hoisted capture, +found while generalizing), and pattern-only re-declaration after capture +(the R1 rule now keys on the LAST pattern index). Hoisted-captured +identifier re-declaration stays modeled (pinned: computes, db=0); +all-refs-after-all-declarations shapes stay clean. Suite 269. The +`--types` lane was not re-run: the change adds counters only, no +typeOfNode fact can differ by construction. + ## The `--types` diff lane re-run (oracle facts changed ⇒ re-measured) The P3.5 normalizer/machine fixes change what the oracle reports, so the diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index c3d1aed5..dfa8eb13 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit c3d1aed5041a75681f69b762015adb06f3e654c2 +Subproject commit dfa8eb138dc7bd20a7537929464de19aec4081fa From 5978a4e0e1ce827d4d0c249cca9a9c2f299eaf50 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 17:25:16 -0700 Subject: [PATCH 102/146] eir: P3.6 typed calling convention / function specialization MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The first deliberate crossing of the unguarded-consumption line (P3.5 is the precondition): a function with a LOCAL CLOSED WORLD gets a specialized clone with a native unboxed signature, and its enumerated call sites become direct typed calls. - lib/eir/specialize.ts: structural, oracle-free escape analysis over optimized EIR. Two closure flows qualify: SSA-visible (every use of the make_closure value is a plain call's callee) and promoted-slot (single store into a never-exported %self slot, every load a plain call's callee — the shape toplevel function declarations lower to). Anything else rejects; a wrong oracle can never widen what specializes. Exports are never candidates (boxed slot ABI); the boundary-guard wrapper for escaping entries is follow-on work. Slot rewrites: same-function store-dominated loads, plus cross-function loads when the store sits in the toplevel entry prefix (no CALL-effect inst before it — no user code can observe the uninitialized slot; a load textually earlier in entry stays generic, preserving the hoisting-lost throw). Runs to a fixpoint so sites inside freshly-lowered clone bodies rewrite too. - SpecMode clone lowering (lower.ts): clones re-lower from the AST with Func.sig = f64 formals (boxed once at entry) + f64 result; oracle-number arithmetic emits unguarded unbox/f64-op/box — no diamonds, no slow paths, `return ` returns raw. Trust-free post-checks discard any clone that can't honor the sig (env/this use, frame ops, non-f64 returns). - call_typed (imms.direct's typed sibling): [env, ...raw args], verifier is now module-aware and re-checks every call against the callee sig (arity, per-slot types, stamped result). Emitter gives sigged clones a native double(env, double...) LLVM signature, internal linkage — LLVM finally inlines through the call. - Trust-free optimizer additions so clones (and diamonds) go raw end-to-end: unbox(box(x))/unbox(const) annihilation; const-number rawJoin edge args minted as f64_const (admissible, never a root — a const-only join stays boxed and flag-off code never grows boxes); boolean-join threading (const true/false edges bypass the to_boolean+cond_br re-test — kills the per-iteration _ejs_truthy call; the join's param/boolean must die in-block, a dominance hazard the stage1 matrix caught on its first run). - EJS_NO_EIR_SPEC=1 bisect hook; --types stats line grows specialized/specSites/specRejected. Gates (docs/maam-p0-results.md "Phase 3.6 gates"): //:test-eir 130 tests green (closed-world clone, lying-oracle escape trio, post-check rejections, verifier quartet, cleanup passes); full matrix green incl. lowtier (first run caught a real threading dominance bug -- that's the gate working); --types diff lane 0-divergent (459 files incl. the demo, diamonds 76 = P3.5 baseline 69 + demo's 7); probe census intact plus types-spec1/2 + types-specescape1 (all match node and flag-off); types-bench1 0.23s -> 0.07s, ~46x vs flag-off (was 14.0x); the hypot2 demo goes ~7x -> ~90x with both clones LLVM-inlined into the toplevel loop (before/after regenerated in ~/src/echojs/hypot2-types-before-after.txt). Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 210 ++++++++++++++ docs/maam-plan.md | 31 ++- lib/compiler.ts | 7 +- lib/eir/emit.ts | 82 ++++-- lib/eir/integrate.ts | 61 +++- lib/eir/ir.ts | 14 + lib/eir/lower.ts | 123 ++++++++- lib/eir/ops.ts | 13 + lib/eir/optimize-guards.ts | 80 +++++- lib/eir/optimize.ts | 50 +++- lib/eir/printer.ts | 5 +- lib/eir/specialize.ts | 474 ++++++++++++++++++++++++++++++++ lib/eir/tests.ts | 256 ++++++++++++++++- lib/eir/verifier.ts | 100 +++++-- test/types/README.md | 8 +- test/types/types-spec1.js | 19 ++ test/types/types-spec2.js | 16 ++ test/types/types-specescape1.js | 23 ++ 18 files changed, 1519 insertions(+), 53 deletions(-) create mode 100644 lib/eir/specialize.ts create mode 100644 test/types/types-spec1.js create mode 100644 test/types/types-spec2.js create mode 100644 test/types/types-specescape1.js diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index 50195fdf..a818fe42 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -788,3 +788,213 @@ Re-run once more on the round-3 pin (maam c3d1aed, logs byte-for-byte the same (diamonds 69 / queries 1320 / unknown 866): the R1 accounting and R2 defaults-scan changed no oracle facts on this corpus. + +# Phase 3.6 gates (typed calling convention / function specialization) + +Date: 2026-07-23. echojs @ eir (this commit), maam @ dfa8eb1 (unchanged +— P3.6 is entirely compiler-side; the oracle interface needed nothing +new: param/return facts come from the existing node-identity +`typeOfNode` over declaration ids and return-argument expressions). +Same environment and color-free protocol as Phases 3–3.5. + +## What landed + +The first deliberate crossing of the unguarded-consumption line — P3.5 +(the differential harness) is the precondition that makes the oracle's +claims trustworthy enough to become facts, and everything that TRUSTS a +claim is fenced by structural, oracle-free machinery: + +- **Local-closed-world escape analysis** (lib/eir/specialize.ts) — + operand flow over the OPTIMIZED lowered EIR, consulting the oracle for + nothing. Two closure-flow shapes qualify: every use of a + make_closure value is a plain call's callee (SSA-visible), or the + closure's single store lands in a promoted, never-exported `%self` + slot whose every load is a plain call's callee (the shape every + toplevel `function` declaration lowers to). ANY other use — edge + arg, object/array member, call argument, construct, return, a + non-promoted (exported) slot, a second store — rejects the function. + A wrong oracle can therefore never widen what specializes. + Slot-load rewrites come in two strengths: same-function loads + dominated by the store, and — when the store sits in the toplevel + ENTRY block with no CALL-effect instruction before it — loads in ANY + function (no user code can run before such a store, so no load can + observe the uninitialized slot; a load textually earlier in the + entry block stays generic, preserving the documented hoisting-lost + throw). The pass runs to a small fixpoint so call sites inside + freshly-lowered clone bodies rewrite too (sum$typed's call of + hypot2 lands on hypot2$typed). +- **Specialized clones, born unguarded** (SpecMode in lib/eir/lower.ts) + — a qualifying function is RE-LOWERED from its AST with an unboxed + signature (`Func.sig`, f64 formals + f64 result): formals arrive raw + and box exactly once at entry, oracle-number arithmetic emits + unbox/f64-op/box straight-line (no diamond, no slow path — "drop the + slow path from the clone" by construction), and `return ` + returns the raw f64. Guards never exist in the clone rather than + being folded out of it. +- **Trust-free post-checks** — the lowered clone is DISCARDED (clone + count telemetry `specRejected`) unless it structurally honors its + sig: env param unused, `this` unused, no frame ops + (arguments/rest/new.target/super), every return operand f64. A lying + oracle that sneaks a capture/`this`/bare-return shape past the type + gate loses the clone, never correctness. +- **Typed direct calls** — new `call_typed` op (imms.direct's typed + sibling): operands `[env, ...raw f64 args]`, callee resolved by name, + re-checked against the callee's sig by the (now module-aware) + verifier: arg types, arity, and the stamped result type must all + match. Exact-arity, non-protected call sites rewrite to + caller-unboxed direct calls (`specSites`); everything else stays on + the generic path (still enumerated — correctness never depends on + rewriting). The emitter gives sigged clones a NATIVE signature — + `double(EjsValue env, double...)`, internal linkage, no + closure-dispatch interop — which is what finally lets LLVM inline and + scalar-optimize through the call. +- **Three trust-free optimizer additions** (they fire wherever their + structural proofs hold, oracle or not): `unbox_f64(box_f64(x)) → x` + and `unbox_f64(const n) → f64_const n` annihilation; const-number + edge args admitted into rawJoin conversion as `f64_const` roots-once- + rooted (a loop accumulator seeded `s = 0` finally goes raw — but a + const-ONLY join stays boxed, so flag-off code never grows boxes); and + boolean-join threading (constant true/false edges into a + `to_boolean`+cond_br re-test jump straight to the branch target, + removing the per-iteration `_ejs_truthy` call from typed loop + headers). The threading pass requires the join's param and boolean + to die inside the block — the stage1 matrix caught exactly that + dominance hazard on first run (compiling specialize.js itself), and + the locality check is the fix. +- **Exports are never specialized** in this round, per the plan's ABI + rule; the conservatively-guarded boundary WRAPPER that would dispatch + an escaping/exported function's generic entry to its clone is + deliberate follow-on work (nothing in the P3.6 gate needs it). + +`EJS_NO_EIR_SPEC=1` bisects specialization alone (same mold as +EJS_NO_EIR_OPT). Telemetry rides the `--types` stats line: +`specialized=N specSites=M specRejected=K` (absent when nothing +qualified). + +## EIR-shape unit tests + +//:test-eir green — 130 tests, including the new Phase 3.6 set: the +closed-world clone (sig f64(f64), zero has_tags, zero generic ops, both +sites call_typed, dead closure swept); the wrong-oracle escape trio (a +lying stub oracle types everything {number} while the closure escapes +as a return value / into a LIVE object literal / as a call argument — +zero clones, and the object-literal case documents that a DEAD escape +sunk by the optimizer is correctly no escape); env-capture and +`this`-use clones discarded by the post-checks (specRejected=1 each); +early disqualifiers (bare `return;`, top param, arguments-object); +arity-mismatch sites keeping the generic path while the exact site +rewrites (closure survives for the generic site); the verifier +quartet (f64 entry param without a sig rejected, sigged param +accepted, f64-result function must return raw f64, call_typed checked +against the callee sig: boxed arg / wrong result stamp / unknown callee +all rejected); and the two cleanup passes (unbox-of-const folds to +f64_const; `<`-diamond constant edges thread while the slow arm's +re-test survives). + +## test/types probes + +All ten probes match `node` (the wrongoracle exception unchanged), the +pre-existing five keep their census diamond counts (6/4/5/0/6); census +updated in test/types/README.md: + +- **types-spec1** (new): looping module-local kernel → + `specialized=1 specSites=2`, the extra-arg call site stays generic, + output identical to node and to flag-off. +- **types-spec2** (new): the hypot2-demo shape — hypot2 called only + inside sum, prefix-safe toplevel stores → `specialized=2 specSites=4` + including the site inside sum$typed (the fixpoint round), output + identical to node and to flag-off. +- **types-specescape1** (new): numerically-typed function whose closure + ALSO travels as a call argument → no specialization telemetry (both + the num|str param join and the structural escape reject it), and the + escaped path feeds a string through the generic call — output + identical to node and to flag-off. +- types-wrongoracle1 unchanged: flag-off ≡ --types ("42"), the + cross-module string still routes through the guard. + +## Microbenchmark (types-bench1, deltas vs Phase 3 / 3.4) + +Same kernel, same protocol (7× interleaved, /usr/bin/time -p). The +kernel now compiles to: a specialized `double kernel$typed(env, double)` +clone whose loop is raw f64 end-to-end (f64 loop-carried params via the +const-root extension, f64_consts, comparison threaded straight to the +branch — no box, no guard, no runtime call in the body), LLVM-inlined +into the toplevel loop (verified in the .bc.opt disassembly: no call +remains, only `.i`-suffixed inlined blocks). + +| build | P3 | P3.4 | P3.6 | +|---|---|---|---| +| flag-off median | 3.19 s | 3.21 s | 3.24 s (3.20–3.29; a concurrent-load re-run read 3.33–3.40 with --types unchanged) | +| --types median | 0.31 s | 0.23 s | **0.07 s** | + +**Speedup ~46× median (was 14.0×)** — the typed runtime dropped another +70%, and at ~1.75 ns per iteration the loop is at fdiv-throughput +territory; the remaining wall time is the boxed outer loop's slot +traffic, which is shapes-and-layouts (P4) territory, not calls. +diamonds=9, oracleUnknown=0, `specialized=1 specSites=1`, output +identical (13333303333341514000). + +## hypot2 demo (deltas vs Phase 3.4 — the P3.6 flagship shape) + +The demo Phase 3.4 could not move (dominated by the boxed +call/closure/loop overhead around hypot2) is exactly what P3.6 exists +for. `--types` stats: diamonds=7 oracleQueries=31 oracleUnknown=0 +**specialized=2 specSites=3** — hypot2 AND sum clone; the toplevel +`sum(20000000)` call, hypot2's call inside generic sum, and hypot2's +call inside sum$typed (fixpoint round) all rewrite to call_typed. +hypot2$typed is three raw float ops and a raw return; sum$typed is a +raw-f64 loop calling it directly. At the LLVM level NO definition or +call of either clone survives — hypot2$typed inlined into sum$typed +inlined into the toplevel, the hot loop is five raw float ops with +`phi double` accumulators, boxing once at the console.log boundary +("the demo's hypot2 inlines into its caller's loop and the box/unbox +pairs annihilate", as the plan wrote it). + +| build | P3/P3.4 (3 runs) | P3.6 (7× interleaved) | +|---|---|---| +| flag-off | 2.5–2.7 s | median 2.69 s | +| --types | 0.33–0.51 s (~7×) | **median 0.03 s (~90×)** | + +Output identical to node and flag-off (5.333333333333098e+21, n=20M). +Full before/after EIR and LLVM excerpts regenerated in +`~/src/echojs/hypot2-types-before-after.txt` (Phase 3.4 and Phase 3 +records preserved below the new section). + +## The --types diff lane (behavioral gate) + +Re-assembled work tree (srcdir-tree + lib/generated + repo test/, plus +the hypot2 demo.js), conc 4, logs `~/.cache/maam-p0-logs/p36-lane-final/`: + +| files | identical | divergent | N/A | timeouts | +|---|---|---|---|---| +| 459 (458-file corpus + demo.js) | 458 | **0** | 1 (tester.js, unchanged) | 0 | + +Aggregates: **diamonds 76** = the P3.5 baseline 69 + demo.js's 7; +oracleQueries 2997, oracleUnknown 2191 (up from 1320/866 because the +specialization pass now queries per-candidate param/return nodes — +telemetry, not a behavior change). An earlier run of the same corpus +WITHOUT demo.js, before the cross-function extension, read 458/457/0/1 +with diamonds 69 byte-identical to the P3.5 baseline. + +## Matrix + stage2 ≡ stage3 (flag off) + +Full matrix on the final code: //:test-eir, //:test-eir-lowtier, +//:test-stage0..3 in one build — BUILD SUCCEEDED (exit 0). The FIRST +matrix run of this phase FAILED, by design of the gate: stage1 +(compiling lib/eir/specialize.js itself, flag-off) hit an EIR verifier +dominance error — boolean-join threading had bypassed a join whose +param was still consumed downstream. The fix (the join's param and +boolean must die in-block) is pinned by the re-run; flag-off behavior +is covered by the stage corpus gates, and the only new flag-off-capable +pass (threading) is semantics-preserving constant-edge routing. + +## Reading + +P3.6 holds the phase's core promise: oracle claims become facts ONLY +inside a fence of structural evidence (escape analysis, post-checks, +sig-aware verification) that a wrong oracle cannot cross, and the first +matrix run proving the fence catches real hazards (the threading +dominance bug) is exactly the discipline paying off. The demo kernel's +call boundary is gone — specialized, direct, native-signature, inlined +— and the ~46× ceiling now sits where the plan predicted the next wall: +boxed heap traffic (shapes, Phase 4) rather than calls or arithmetic. diff --git a/docs/maam-plan.md b/docs/maam-plan.md index ab048dd1..8937927d 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -511,7 +511,7 @@ Smaller forward items surfaced by the Chunk A integration review: later-declared same-scope vars silently dropped; generalized to function expressions/arrows/methods after adversarial review) — details in docs/maam-p0-results.md "Phase 3.5". -- [ ] **P3.6** typed calling convention / function specialization +- [x] **P3.6** typed calling convention / function specialization (see the Phase 3.6 section; HARD PRECONDITION: P3.5 green): local-closed-world escape analysis, specialized unboxed clones + direct calls; exports are NEVER specialized (boxed slot ABI is a @@ -523,5 +523,34 @@ Smaller forward items surfaced by the Chunk A integration review: rejected by the escape analysis, not miscompiled); demo-class benchmark showing the clone inlines (delta vs the Phase 3 10.3× ceiling recorded). + Landed as lib/eir/specialize.ts (+ SpecMode clone lowering in + lower.ts, Func.sig/call_typed/f64_const in the IR, sig-aware + verifier + native-signature emission): structural, oracle-free + escape analysis over lowered EIR (SSA-visible closures and + single-store promoted %self slot cells; ANY other flow rejects), + trusted-mode clone lowering (no diamonds, no slow paths, f64 + formals boxed once at entry, raw f64 returns), trust-free + post-checks discarding any clone that can't honor its sig + (env/this use, frame ops, non-f64 returns), exact-arity call + sites rewritten to call_typed with caller-side unboxing — + same-function store-dominated slot loads, plus cross-function + loads when the store sits in the toplevel entry prefix (no + CALL-effect inst before it), to a fixpoint so sites inside + freshly-lowered clones rewrite too. Three trust-free optimizer + additions let clones go raw end-to-end: unbox(box)/unbox(const) + annihilation, const-number rawJoin edge roots (f64_const), and + boolean-join threading. Exports/escaping functions are simply + never specialized in this round — the boundary-guard wrapper + dispatching escaping entries to the clone remains OPEN follow-on + work (nothing needs it for the gate). + Gates: matrix green; diff lane 0-divergent; wrong-oracle + specialization probes at unit level (lying stub oracle vs + escaping shapes → 0 clones) and probe level + (test/types/types-spec1/2.js, types-specescape1.js); types-bench1 + 0.23 s → 0.07 s (14.0× → ~46× vs flag-off); the hypot2 demo goes + ~7× → ~90×, both clones verified LLVM-inlined into the toplevel + loop (before/after regenerated in + ~/src/echojs/hypot2-types-before-after.txt). Details in + docs/maam-p0-results.md "Phase 3.6 gates". - [ ] **P4** (design doc only) shape-guarded property access: guard op, runtime layout, promotion criteria from Phase 3 experience. diff --git a/lib/compiler.ts b/lib/compiler.ts index be76f047..49b43591 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -732,7 +732,12 @@ export function compile( if (type_oracle) console.warn( `--types: ${source_filename}: diamonds=${lowered.diamonds ?? 0} ` + - `oracleQueries=${type_oracle.stats.queries} oracleUnknown=${type_oracle.stats.unknown}` + `oracleQueries=${type_oracle.stats.queries} oracleUnknown=${type_oracle.stats.unknown}` + + // Phase 3.6 telemetry, present only when specialization ran + (lowered.spec + ? ` specialized=${lowered.spec.specialized} specSites=${lowered.spec.sites}` + + ` specRejected=${lowered.spec.rejected}` + : "") ); const toplevel_node = tree.body[0] as e.FunctionDeclaration; diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index ae98a477..b98375ea 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -144,14 +144,30 @@ export class EIREmitter { if (fns.has(fn.name)) throw new Error(`EIR emit: duplicate function name '${fn.name}' in module`); let llvm_name = `_ejs_eir_${fn.name.replace(/[^A-Za-z0-9_]/g, "_")}_${mangle_gen++}`; - let llvm_fn = types.takes_builtins( - this.abi.createFunction( - this.module, - llvm_name, - this.abi.ejs_return_type, - this.abi.ejs_params.map((p) => p.llvm_type) - ) - ); + let llvm_fn; + if (fn.sig) { + // Phase 3.6 specialized clone: a native unboxed signature + // — (env, double...) -> double — instead of the runtime's + // boxed (env, this*, argc, argv*, newTarget) convention. + // Internal-linkage, direct-call-only (call_typed), so no + // takes_builtins and no closure-dispatch interop; this is + // what finally lets LLVM inline and scalar-optimize + // through the call. + const param_types = [this.abi.ejs_params[0]!.llvm_type].concat( + fn.sig.formals.map((f) => (f === "f64" ? types.Double : types.EjsValue)) + ); + const ret_type = fn.sig.result === "f64" ? types.Double : types.EjsValue; + llvm_fn = this.abi.createFunction(this.module, llvm_name, ret_type, param_types); + } else { + llvm_fn = types.takes_builtins( + this.abi.createFunction( + this.module, + llvm_name, + this.abi.ejs_return_type, + this.abi.ejs_params.map((p) => p.llvm_type) + ) + ); + } llvm_fn.setInternalLinkage(); fns.set(fn.name, llvm_fn); } @@ -182,15 +198,18 @@ export class EIREmitter { const args = llvmFn.args; const env = args[0]!; - const this_ptr = args[1]!; - const argc = args[2]!; - const args_ptr = args[3]!; + // Phase 3.6 clones have no this*/argc/argv*/newTarget — the + // specialization pass guarantees no op that needs them survives + // (frame ops, this-uses, and generic returns all discard a clone) + const this_ptr = eirFn.sig ? undefined! : args[1]!; + const argc = eirFn.sig ? undefined! : args[2]!; + const args_ptr = eirFn.sig ? undefined! : args[3]!; // rest_args / args_obj / construct_super / new_target need the raw // calling-convention values this.fn_argc = argc; this.fn_args_ptr = args_ptr; this.fn_this_ptr = this_ptr; - this.fn_new_target = args[4]!; + this.fn_new_target = eirFn.sig ? undefined! : args[4]!; // scratch space for outgoing call arguments, and a slot for passing // &this to the runtime's calling convention @@ -244,12 +263,21 @@ export class EIREmitter { const entry_params = eirFn.entry!.params; // params[0] = %env, params[1] = %this, rest are JS formals if (entry_params.length > 0) this.values.set(entry_params[0]!, env); - if (entry_params.length > 1) { - let this_val = ir.createLoad(types.EjsValue, this_ptr, "this"); - this.values.set(entry_params[1]!, this_val); + if (eirFn.sig) { + // typed convention: formals arrive directly (raw doubles for + // f64 formals) at llvm args [1..]; %this is required-unused — + // bind undefined so a stray use fails loudly downstream + if (entry_params.length > 1) this.values.set(entry_params[1]!, this.undef()); + for (let i = 2; i < entry_params.length; i++) + this.values.set(entry_params[i]!, args[i - 1]!); + } else { + if (entry_params.length > 1) { + let this_val = ir.createLoad(types.EjsValue, this_ptr, "this"); + this.values.set(entry_params[1]!, this_val); + } + for (let i = 2; i < entry_params.length; i++) + this.values.set(entry_params[i]!, this.emitArgLoad(argc, args_ptr, i - 2)); } - for (let i = 2; i < entry_params.length; i++) - this.values.set(entry_params[i]!, this.emitArgLoad(argc, args_ptr, i - 2)); // remember where the prologue ended; the branch into the eir entry // block is emitted *after* the body, because the legacy cached- // literal helpers append their initializing stores to the end of @@ -492,6 +520,9 @@ export class EIREmitter { case "unbox_f64": this.values.set(inst, this.v.unboxDouble(this.val(inst.operands[0]))); return; + case "f64_const": + this.values.set(inst, llvm.ConstantFP.getDouble(inst.imms["value"] as number)); + return; case "box_f64": this.values.set(inst, this.v.boxDouble(this.val(inst.operands[0]))); return; @@ -692,6 +723,16 @@ export class EIREmitter { "callres" ); } + case "call_typed": { + // Phase 3.6: direct call to a specialized clone — args are + // raw machine values in registers, no scratch spill, no + // closure dispatch + const target = this.llvm_fns.get(inst.imms["fn"] as string); + if (!target) + throw new Error(`EIR emit: unknown call_typed callee ${String(inst.imms["fn"])}`); + const argv = inst.operands.map((o) => this.val(o)); + return this.emitCallLike(inst, target, argv, "tcall"); + } case "construct": { let callee = this.val(inst.operands[0]); let args = inst.operands.slice(1).map((o) => this.val(o)); @@ -873,7 +914,12 @@ export class EIREmitter { return; } case "return": { - this.abi.createRet(this.llvmFn, this.val(inst.operands[0])); + // an f64-result clone returns the raw double directly (a + // plain scalar return needs none of the ABI's ejsval + // struct-return handling) + if (this.eirFn.sig && this.eirFn.sig.result === "f64") + ir.createRet(this.val(inst.operands[0])); + else this.abi.createRet(this.llvmFn, this.val(inst.operands[0])); return; } case "throw": { diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index e80003a9..7579a855 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -23,6 +23,8 @@ import * as b from "../ast-builder"; import * as debug from "../debug"; import { ScopeAnalysis } from "./scopes"; import { lowerAnalyzedFunction } from "./lower"; +import { specializeModule } from "./specialize"; +import type { SpecStats } from "./specialize"; import type { TypeOracle } from "./oracle"; import type { ModuleRef, ModCtx } from "./lower"; import { isLowerNotSupported } from "./errors"; @@ -45,8 +47,21 @@ export interface ModuleAccessor { } export type CollectResult = - | { eir_module: Module; accessors: ModuleAccessor[]; diamonds: number; error?: undefined } - | { error: string; eir_module?: undefined; accessors?: undefined; diamonds?: undefined }; + | { + eir_module: Module; + accessors: ModuleAccessor[]; + diamonds: number; + // Phase 3.6 (null when --types is off or nothing qualified) + spec: SpecStats | null; + error?: undefined; + } + | { + error: string; + eir_module?: undefined; + accessors?: undefined; + diamonds?: undefined; + spec?: undefined; + }; // --dump-after eir: print the lowered (verified) EIR module function dumpRequested(options: CompilerOptions | undefined): boolean { @@ -392,7 +407,7 @@ export function collectEIRToplevel( // the toplevel environment, which a direct caller's envParam // wouldn't carry. direct calls stay a devirtualization // opportunity for the optimizer, which can prove capture shapes. - let typed_stats = { diamonds: 0 }; + let typed_stats = { diamonds: 0, trusted: 0 }; let mod_ctx = { refs: refs, this_module_info: this_module_info, @@ -421,6 +436,7 @@ export function collectEIRToplevel( // debugging/measurement: EJS_NO_EIR_OPT=1 disables the EIR // optimizer without touching the LLVM pass pipeline (-O0 changes // both), mirroring the EJS_NO_PROMOTE bisect hook + let spec_stats: SpecStats | null = null; if (options.opt_level > 0 && !process.env["EJS_NO_EIR_OPT"]) { const stats = optimizeModule(eir_module); if ( @@ -444,6 +460,38 @@ export function collectEIRToplevel( `${stats.raw_join_params} raw f64 join param(s)` ); verifyModule(eir_module); + + // Phase 3.6: function specialization. Runs AFTER the first + // optimizer pass (EIR inlining has already taken the + // single-block calls it can — a make_closure with no remaining + // call uses is no longer a candidate) and only with an oracle + // (never on flag-off compiles). A second optimizer pass then + // cleans the clones (entry boxes prove numbers; residual + // guards fold; loop joins go raw; dead closures/loads drop). + // EJS_NO_EIR_SPEC=1 bisects specialization alone. + if (oracle && !process.env["EJS_NO_EIR_SPEC"]) { + spec_stats = { specialized: 0, sites: 0, rejected: 0 }; + const changed = specializeModule( + eir_module, + analysis, + oracle, + this_module_info, + mod_ctx, + spec_stats + ); + if (changed) { + verifyModule(eir_module); + optimizeModule(eir_module); + verifyModule(eir_module); + debug.log( + 1, + `EIR-spec: ${filename}: ${spec_stats.specialized} fn(s) specialized, ` + + `${spec_stats.sites} call site(s) rewritten, ` + + `${spec_stats.rejected} clone(s) rejected` + ); + } + if (spec_stats.specialized === 0 && spec_stats.rejected === 0) spec_stats = null; + } if (dumpOptRequested(options)) dumpModule(filename, "optimized", eir_module); } @@ -455,7 +503,12 @@ export function collectEIRToplevel( `EIR: ${filename}: whole module lowered (toplevel-as-EIR)` + (typed_stats.diamonds > 0 ? `, ${typed_stats.diamonds} typed diamond(s)` : "") ); - return { eir_module: eir_module, accessors: accessors, diamonds: typed_stats.diamonds }; + return { + eir_module: eir_module, + accessors: accessors, + diamonds: typed_stats.diamonds, + spec: spec_stats, + }; } catch (e) { if (!isLowerNotSupported(e)) throw e; // there is no legacy pipeline to fall back to anymore: surface diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts index 7f8a50d5..05b7192a 100644 --- a/lib/eir/ir.ts +++ b/lib/eir/ir.ts @@ -50,6 +50,18 @@ export class Module { } } +// Phase 3.6: a specialized clone's typed signature. `formals` types the +// JS formal parameters only (entry params [0]=%env and [1]=%this stay +// boxed/implicit; a clone's %this is required-unused by the static callee +// checks). This is the second controlled lift of the P2 +// raw-values-cannot-cross-blocks rule: an entry blockparam may be f64 +// exactly when the sig's matching formal says so, and the verifier +// re-checks every call_typed against the callee's sig. +export interface FuncSig { + formals: ("any" | "f64")[]; + result: "any" | "f64"; +} + export class Func { name: string; paramNames: string[]; @@ -57,6 +69,8 @@ export class Func { next_value_id = 0; next_block_id = 0; entry: Block | null = null; + // non-null only on specialized clones (specialize.ts) + sig: FuncSig | null = null; constructor(name: string, paramNames?: string[]) { this.name = name; diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index 8aa9457f..985c0774 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -56,7 +56,24 @@ export interface ModCtx { // paths, today's lowering exactly) and the module-wide stats the // lowered functions accumulate into oracle?: TypeOracle | null; - typed_stats?: { diamonds: number }; + typed_stats?: { diamonds: number; trusted?: number }; +} + +// Phase 3.6: clone-lowering mode (specialize.ts). The clone gets an +// unboxed signature (f64 formals, boxed once at entry) and lowers +// oracle-number arithmetic UNGUARDED — no diamonds, no slow paths. +// This is the phase's deliberate unguarded-consumption line: oracle +// claims become facts, backed by the P3.5 differential harness and by +// the escape analysis that gates which functions are cloned at all. +export interface SpecMode { + cloneName: string; + // formal parameter types; "f64" formals arrive raw and are boxed once + // at entry + formals: ("any" | "f64")[]; + // when "f64", `return ` with an oracle-number argument returns + // the raw f64 (unguarded unbox); any other return shape survives to + // the structural post-check in specialize.ts, which discards the clone + result: "any" | "f64"; } // an environment-descriptor chain node: a per-iteration loop env or a @@ -158,19 +175,48 @@ class LowerFunction { curEnv: Inst; // Phase 3: the module's type oracle (null = no typed fast paths) oracle: TypeOracle | null; - - constructor(info: FnInfo, analysis: ScopeAnalysis, module: Module, mod_ctx?: ModCtx) { + // Phase 3.6: non-null when lowering a specialized clone + spec: SpecMode | null; + + constructor( + info: FnInfo, + analysis: ScopeAnalysis, + module: Module, + mod_ctx?: ModCtx, + spec?: SpecMode | null + ) { this.info = info; this.analysis = analysis; this.module = module; this.isToplevel = !!info.isToplevel; this.mod_ctx = mod_ctx || { refs: new Map() }; this.oracle = this.mod_ctx.oracle ?? null; + this.spec = spec ?? null; const paramNames = info.params.map((p) => p.uid); - this.b = new FunctionBuilder(info.name, ["%env", "%this"].concat(paramNames)); + this.b = new FunctionBuilder( + this.spec ? this.spec.cloneName : info.name, + ["%env", "%this"].concat(paramNames) + ); this.envParam = this.b.fn.entry!.params[0]!; this.thisParam = this.b.fn.entry!.params[1]!; + + // Phase 3.6 clone entry: f64 formals arrive raw and re-enter the + // boxed world exactly once, right here; the body then lowers + // against the boxed value like any other binding. (box_f64 is + // also the optimizer's value-intrinsic number proof, so any + // residual guarded diamond over a formal folds.) + if (this.spec) { + const entry = this.b.fn.entry!; + this.b.fn.sig = { formals: this.spec.formals.slice(), result: this.spec.result }; + for (let i = 0; i < info.params.length; i++) { + if (this.spec.formals[i] !== "f64") continue; + const p = entry.params[i + 2]!; + p.type = "f64"; + const boxed = this.b.emit("box_f64", [p], {}); + this.b.writeVariable(info.params[i]!.uid, entry, boxed); + } + } // `this` reads go through the builder variable "%this" (seeded to // the entry param by the builder): a derived constructor's super() // call rebinds it (the runtime constructs the object and returns @@ -669,11 +715,43 @@ class LowerFunction { // consumption is correct even when the oracle is wrong — the // has_tag guards decide at runtime; only code size/speed change. const f64op = f64ops[n.operator]; - if (f64op && this.operandIsNumber(n.left) && this.operandIsNumber(n.right)) + if (f64op && this.operandIsNumber(n.left) && this.operandIsNumber(n.right)) { + // Phase 3.6 clone bodies consume the oracle UNGUARDED: no + // diamond, no slow path — unbox, compute, re-box. Everywhere + // else the Phase 3 guarded diamond stands. + if (this.spec) return this.trustedNumeric(f64op, l, r); return this.numericDiamond(f64op, op, l, r); + } return this.b.emit(op, [l, r], {}); } + // unguarded typed arithmetic (clone lowering only): unbox both + // operands, apply the f64 op, and re-enter the boxed world. f64_lt's + // i1 rejoins as boxed booleans through the same constant-edge shape + // the diamond's fast arm uses (i1 never crosses a block boundary). + trustedNumeric(f64op: string, l: Inst, r: Inst): Inst { + if (this.mod_ctx.typed_stats) + this.mod_ctx.typed_stats.trusted = (this.mod_ctx.typed_stats.trusted ?? 0) + 1; + const ua = this.b.emit("unbox_f64", [l], {}); + const ub = this.b.emit("unbox_f64", [r], {}); + const v = this.b.emit(f64op, [ua, ub], {}); + if (f64op !== "f64_lt") return this.b.emit("box_f64", [v], {}); + const t_bb = this.b.newBlock("trust_lt_true"); + const f_bb = this.b.newBlock("trust_lt_false"); + const join_bb = this.b.newBlock("trust_lt_join"); + const result = join_bb.addParam("lt"); + this.b.condBr(v, t_bb, [], f_bb, []); + this.b.sealBlock(t_bb); + this.b.sealBlock(f_bb); + this.b.setInsertPoint(t_bb); + this.b.br(join_bb, [this.b.constBool(true)]); + this.b.setInsertPoint(f_bb); + this.b.br(join_bb, [this.b.constBool(false)]); + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + return result; + } + // Does this operand node type as exactly {number}? Numeric literals // qualify directly: the oracle's mapping policy leaves literals // unmapped (glue), so `x + 1` would otherwise never take the fast @@ -1246,6 +1324,14 @@ class LowerFunction { if (this.finallyCtx.length > 0) { if (this.runFinalizers(0)) return; // a finalizer overrode control } + // Phase 3.6 clone with an f64 result: return the raw f64 + // (unguarded unbox — the same trust as trustedNumeric). + // A return this can't prove leaves a boxed return that the + // structural post-check in specialize.ts rejects, so a + // clone never ships with a sig its returns don't honor. + if (this.spec && this.spec.result === "f64" && n.argument && + this.operandIsNumber(n.argument)) + rv = this.b.emit("unbox_f64", [rv], {}); this.b.ret(rv); return; } @@ -1823,6 +1909,33 @@ function lowerOneFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, return info.fn; } +// Phase 3.6: lower a specialized clone of an already-lowered function. +// Unlike lowerOneFunction this ignores info.lowered/info.fn (the generic +// lowering stands), gives the Func the clone's name and typed sig, and +// lowers oracle-number arithmetic unguarded (SpecMode). Children were +// lowered with the generic pass and are shared by name (make_closure in +// the clone body resolves to the same child Funcs). The caller +// (specialize.ts) owns the structural post-checks and adds the Func to +// the module only when they pass. +export function lowerSpecializedClone( + info: FnInfo, + analysis: ScopeAnalysis, + module: Module, + mod_ctx: ModCtx, + spec: SpecMode +): Func { + const lf = new LowerFunction(info, analysis, module, mod_ctx, spec); + if (info.node.body.type === "BlockStatement") lf.stmt(info.node.body); + else { + // expression-bodied arrow: same typed-return rule as ReturnStatement + let rv = lf.expr(info.node.body); + if (spec.result === "f64" && lf.operandIsNumber(info.node.body as e.Expression)) + rv = lf.b.emit("unbox_f64", [rv], {}); + lf.b.ret(rv); + } + return lf.finish(); +} + // lower a FunctionDeclaration/FunctionExpression AST node into a fresh // module; returns { module, fn } export function lowerFunctionNode( diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 260a0f19..52825b09 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -117,6 +117,15 @@ export const OPS = { // call: [callee, this, ...args], or with imms.direct set (a direct // call to a known EIR function): [env, this, ...args] call: { arity: -1, effects: GENERIC_OP, may_terminate: true, imms: ["direct"] }, + // Phase 3.6: imms.direct's typed sibling — a direct call to a + // specialized clone (imms.fn) with an unboxed signature. operands = + // [env, ...args] where each arg slot's type must match the callee + // Func.sig's formal ("f64" formals take raw f64 values); no `this` + // (static callee checks exclude this/arguments/rest/defaults). The + // result type is the callee sig's result, stamped on the Inst by the + // specialization pass and re-checked against the callee by + // verifyModule (per-op sigs can't express callee-dependent typing). + call_typed: { arity: -1, effects: GENERIC_OP, may_terminate: true, imms: ["fn"] }, construct: { arity: -1, effects: GENERIC_OP, may_terminate: true }, // super(...) in a derived constructor: [super_ctor, ...args] (or // [super_ctor, args_array] for the _apply form). calls the super @@ -174,6 +183,10 @@ export const OPS = { // imms.tag: the runtime tag tested; only "number" is emitted today // (mirrors LLVMIRVisitor.isNumber, inheriting its per-target check) has_tag: { arity: 1, effects: E.NONE, imms: ["tag"], sig: { params: ["ejsval"], result: "i1" } }, + // a raw f64 constant (imms.value). minted only by the optimizer + // (rawJoinParams' const-number edge roots) and the specialization + // pass; lowering itself always emits boxed `const` numbers. + f64_const: { arity: 0, effects: E.NONE, imms: ["value"], sig: { params: [], result: "f64" } }, unbox_f64: { arity: 1, effects: E.NONE, sig: { params: ["ejsval"], result: "f64" } }, box_f64: { arity: 1, effects: E.GC, sig: { params: ["f64"], result: "any" } }, f64_add: { arity: 2, effects: E.NONE, sig: { params: ["f64", "f64"], result: "f64" } }, diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index f7f692de..576a85a6 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -752,7 +752,10 @@ function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: O export function rawJoinParams(fn: Func, stats: OptStats): boolean { // candidates: non-entry, non-catch params whose every incoming arg is - // a box_f64, an f64 value, itself, or another candidate param + // a box_f64, an f64 value, a number constant (Phase 3.6: converted to + // a raw f64_const on the edge — a loop accumulator seeded `x = 0` + // now qualifies), itself, or another candidate param + const isNumConst = (v: Inst) => v.op === "const" && v.imms["kind"] === "number"; const cands = new Set(); for (const b of fn.blocks) { if (b.isCatch || b === fn.entry) continue; @@ -772,6 +775,7 @@ export function rawJoinParams(fn: Func, stats: OptStats): boolean { break; } if (arg === p || arg.op === "box_f64" || arg.type === "f64") continue; + if (isNumConst(arg)) continue; if (arg.op === "blockparam" && !arg.isException) continue; // resolved in pruning ok = false; break; @@ -828,7 +832,7 @@ export function rawJoinParams(fn: Func, stats: OptStats): boolean { let keep = true; for (const e of b.predEdges) { const arg = e.inst.targets![e.targetIndex]!.args[argIdx]!; - if (arg === p || arg.type === "f64") continue; + if (arg === p || arg.type === "f64" || isNumConst(arg)) continue; if (arg.op === "blockparam") { if (!cands.has(arg)) keep = false; } else if (arg.op === "box_f64") { @@ -857,6 +861,10 @@ export function rawJoinParams(fn: Func, stats: OptStats): boolean { const argIdx = b.argIndexOfParam(p); for (const e of b.predEdges) { const arg = e.inst.targets![e.targetIndex]!.args[argIdx]!; + // NB: a number const is admissible but NOT a root — a + // const-only join must stay boxed (flag-off code would + // otherwise grow boxes for no typed-region payoff); + // only a real f64/box_f64 producer roots the graph. if ( arg.op === "box_f64" || arg.type === "f64" || @@ -889,6 +897,15 @@ export function rawJoinParams(fn: Func, stats: OptStats): boolean { const t = e.inst.targets![e.targetIndex]!; const arg = t.args[argIdx]!; if (arg.op === "box_f64") t.args[argIdx] = arg.operands[0]!; + else if (isNumConst(arg)) { + // mint the raw producer on the edge; the boxed const keeps + // its other users and falls to DCE when this was the last + const fc = new Inst(fn, "f64_const", [], { value: arg.imms["value"] }); + const eb = e.inst.block!; + fc.block = eb; + eb.insts.splice(eb.insts.indexOf(e.inst), 0, fc); + t.args[argIdx] = fc; + } } } @@ -961,6 +978,65 @@ export function rawJoinParams(fn: Func, stats: OptStats): boolean { return true; } +// --- boolean-join threading --------------------------------------------------- + +// A comparison that rejoins as boxed booleans and immediately re-tests: +// +// ^t: br -> ^join(const true) ^f: br -> ^join(const false) +// ^join(%p): %b = to_boolean %p; cond_br %b -> ^then, ^else +// +// threads each constant edge straight to the cond_br successor it would +// pick (to_boolean(const true/false) is exact), so the fast arm of an +// f64_lt diamond — and a Phase 3.6 clone's trusted compare — branches on +// the raw i1 with no boxed-boolean round-trip (and no _ejs_truthy call) +// left in the loop. Trust-free: constants only. Non-constant edges (a +// diamond's generic slow arm) keep the join and the re-test. +export function threadBooleanJoins(fn: Func, stats: OptStats): boolean { + // uses of every value (operands + outgoing edge args), for the + // locality check below + const useCount = new Map(); + const bump = (v: Inst) => useCount.set(v, (useCount.get(v) || 0) + 1); + fn.forEachInst((inst) => { + for (const o of inst.operands) bump(o); + if (inst.targets) for (const t of inst.targets) for (const a of t.args) if (a) bump(a); + }); + + let changed = false; + for (const b of fn.blocks) { + if (b.isCatch || b === fn.entry) continue; + if (b.params.length !== 1 || b.insts.length !== 2) continue; + const p = b.params[0]!; + if (p.isException || p.removed) continue; + const tob = b.insts[0]!; + const br = b.insts[1]!; + if (tob.op !== "to_boolean" || tob.operands[0] !== p) continue; + if (br.op !== "cond_br" || br.operands[0] !== tob) continue; + // the join's OWN definitions must die inside it: a use of the + // param (or the boolean) downstream would lose def-dominates-use + // the moment an edge bypasses the block + if (useCount.get(p) !== 1 || useCount.get(tob) !== 1) continue; + if (!br.targets || br.targets.length !== 2) continue; + const tTrue = br.targets[0]!; + const tFalse = br.targets[1]!; + if (tTrue.block === b || tFalse.block === b) continue; + if (tTrue.args.length !== 0 || tFalse.args.length !== 0) continue; + + // predEdges mutate as edges retarget: snapshot first + for (const e of b.predEdges.slice()) { + const t = e.inst.targets![e.targetIndex]!; + if (t.kind === "unwind") continue; + const arg = t.args[0]; + if (!arg || arg.op !== "const" || arg.imms["kind"] !== "boolean") continue; + const dest = arg.imms["value"] ? tTrue.block : tFalse.block; + retargetEdge(e.inst, e.targetIndex, dest, []); + stats.joins_threaded++; + changed = true; + } + } + if (changed) sweepUnreachableBlocks(fn); + return changed; +} + // --- driver ----------------------------------------------------------------- // run guard folding + region merging to a fixpoint. Cheap bail when the diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index de69b436..54d682f8 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -22,7 +22,7 @@ import { Func, Inst, Module, replaceAllUses } from "./ir"; import { Effect, opInfo } from "./ops"; -import { optimizeGuardRegions, rawJoinParams } from "./optimize-guards"; +import { optimizeGuardRegions, rawJoinParams, threadBooleanJoins } from "./optimize-guards"; export interface OptStats { allocs_sunk: number; @@ -34,6 +34,10 @@ export interface OptStats { guards_folded: number; regions_merged: number; raw_join_params: number; + // Phase 3.6: unbox_f64(box_f64(x)) round-trips annihilated + unbox_folds: number; + // Phase 3.6: constant edges threaded past boxed-boolean re-tests + joins_threaded: number; } function newStats(): OptStats { @@ -46,6 +50,8 @@ function newStats(): OptStats { guards_folded: 0, regions_merged: 0, raw_join_params: 0, + unbox_folds: 0, + joins_threaded: 0, }; } @@ -550,6 +556,42 @@ function foldIteratorWrappers(useMap: UseMap, fn: Func, stats: OptStats): boolea return changed; } +// --- unbox/box annihilation --------------------------------------------------- + +// unbox_f64(box_f64(x)) is x: box_f64 always produces a genuinely boxed +// number, so the round-trip is the identity (modulo NaN canonicalization, +// which JS semantics cannot observe — a non-canonical NaN payload only +// ever flows into f64 ops, where any NaN behaves alike, or into a later +// box_f64, which canonicalizes). Phase 3.6 clones lean on this: formals +// are boxed once at entry and trusted arithmetic re-unboxes them. +function foldUnboxOfBox(fn: Func, stats: OptStats): boolean { + const boxFolds: Inst[] = []; + const constFolds: Inst[] = []; + fn.forEachInst((inst) => { + if (inst.op !== "unbox_f64") return; + const src = inst.operands[0]!; + if (src.op === "box_f64") boxFolds.push(inst); + else if (src.op === "const" && src.imms["kind"] === "number") constFolds.push(inst); + }); + for (const u of boxFolds) { + replaceAllUses(fn, u, u.operands[0]!.operands[0]!); + const b = u.block!; + const idx = b.insts.indexOf(u); + if (idx >= 0) b.insts.splice(idx, 1); + u.block = null; + stats.unbox_folds++; + } + // unbox_f64(const number) is just the raw constant — rewrite the + // unbox in place to f64_const (same Inst object keeps every use) + for (const u of constFolds) { + u.imms = { value: u.operands[0]!.imms["value"] }; + u.op = "f64_const"; + u.operands.length = 0; + stats.unbox_folds++; + } + return boxFolds.length > 0 || constFolds.length > 0; +} + // --- dead instruction elimination -------------------------------------------- // dead-removable: unused results whose computation is unobservable. @@ -626,6 +668,12 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O // emitted no number guards — every flag-off compile. if (optimizeGuardRegions(fn, s)) eliminateDead(fn, s); if (rawJoinParams(fn, s)) eliminateDead(fn, s); + // Phase 3.6 cleanups. These run AFTER the guard-region passes: the + // merge machinery pattern-matches diamond fast arms (unbox of the + // guarded value / of a literal const), so annihilating round-trips + // or rewriting const unboxes earlier would refuse valid merges. + if (foldUnboxOfBox(fn, s)) eliminateDead(fn, s); + if (threadBooleanJoins(fn, s)) eliminateDead(fn, s); return s; } diff --git a/lib/eir/printer.ts b/lib/eir/printer.ts index f4176097..229202b0 100644 --- a/lib/eir/printer.ts +++ b/lib/eir/printer.ts @@ -37,7 +37,10 @@ export function printFunction(fn: Func): string { const lines: string[] = []; const header_params = fn.entry ? fn.entry.params.map((p) => `${nameOf(p)}: ${p.type}`) : []; - lines.push(`fn @${fn.name}(${header_params.join(", ")}) {`); + // sigged clones (Phase 3.6) print their result type; un-sigged + // functions keep the existing byte-identical header + const result = fn.sig && fn.sig.result !== "any" ? `: ${fn.sig.result}` : ""; + lines.push(`fn @${fn.name}(${header_params.join(", ")})${result} {`); const paramStr = (p: Inst) => `${nameOf(p)}: ${p.type}`; diff --git a/lib/eir/specialize.ts b/lib/eir/specialize.ts new file mode 100644 index 00000000..d8791cec --- /dev/null +++ b/lib/eir/specialize.ts @@ -0,0 +1,474 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Phase 3.6: typed calling convention / function specialization +// (docs/maam-plan.md). For a function with a LOCAL CLOSED WORLD — its +// closure value never escapes and every call site is enumerated +// in-module — emit a specialized clone with an unboxed signature +// (f64 formals, f64 result), rewrite the provably-known call sites to +// direct calls that unbox at the caller, and never emit the slow paths +// in the clone at all (SpecMode lowering). +// +// The trust story crosses the Phase 3 guarded line ON PURPOSE: oracle +// claims become facts inside the clone and at rewritten call sites. +// What keeps that honest: +// - the P3.5 differential harness (hard precondition) validates the +// oracle's abstraction against concrete execution; +// - the escape analysis here is COMPILER-side and structural (operand +// flow over lowered EIR) — it does not consult the oracle, so a +// wrong oracle can never widen the set of functions we specialize; +// a function that LOOKS closed-world but isn't is rejected by +// construction (any non-callee use of the closure value, or any +// slot flow we can't fully enumerate, kills the candidate); +// - structural post-checks on the lowered clone (env/this unused, no +// frame ops, every return actually f64) discard any clone whose body +// could not honor the signature — trust-free, independent of why. +// +// Two closure-flow shapes are recognized (v1): +// - SSA-visible: every use of the make_closure value is the callee +// of a plain call in the same function; +// - promoted-slot: the single store of the closure into a promoted +// (non-exported, module-private) "%self" slot, where every load of +// that slot is used only as a plain-call callee. Loads in the +// storing function are rewritten when the store dominates the load; +// loads elsewhere keep the generic path (still enumerated — they +// call the generic function, never the clone). +// +// Module-level EXPORTS are never candidates: the slot-based module ABI +// exposes boxed ejsvals to JS and native consumers (non-promoted slots +// are readable through importer slot loads and accessor functions), so +// only promoted slots — invisible outside the module — qualify. + +import { Module, Func, Inst, Block } from "./ir"; +import { Effect, opInfo } from "./ops"; +import { computeRPO, computeDominators, dominates } from "./verifier"; +import { lowerSpecializedClone } from "./lower"; +import type { ModCtx, SpecMode } from "./lower"; +import type { ScopeAnalysis, FnInfo } from "./scopes"; +import type { TypeOracle } from "./oracle"; +import type * as e from "../estree"; + +export interface SpecStats { + // clones emitted + specialized: number; + // call sites rewritten to call_typed + sites: number; + // candidates whose lowered clone failed the structural post-checks + rejected: number; +} + +// one use of a value: the using instruction and where the value appears +interface Use { + fn: Func; + user: Inst; + // operand index, or -1 when the value is a branch-edge argument + operandIndex: number; +} + +function usesInModule(m: Module): Map { + const uses = new Map(); + const add = (v: Inst, u: Use) => { + let list = uses.get(v); + if (!list) uses.set(v, (list = [])); + list.push(u); + }; + for (const fn of m.functions) { + fn.forEachInst((inst) => { + inst.operands.forEach((o, i) => add(o, { fn, user: inst, operandIndex: i })); + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) if (a) add(a, { fn, user: inst, operandIndex: -1 }); + }); + } + return uses; +} + +// does the oracle type this node as exactly {number}? numeric literals +// qualify directly (the oracle's mapping policy leaves literals +// unmapped), mirroring LowerFunction.operandIsNumber. +function nodeIsNumber(oracle: TypeOracle, node: e.Node): boolean { + const lit = node as { type?: string; value?: unknown }; + if (lit.type === "Literal") return typeof lit.value === "number"; + if (lit.type === "UnaryExpression") { + const u = node as e.UnaryExpression; + if ( + (u.operator === "-" || u.operator === "+") && + u.argument.type === "Literal" && + typeof (u.argument as e.Literal).value === "number" + ) + return true; + } + const t = oracle.typeOfNode(node); + return t.tags !== "top" && t.tags.size === 1 && t.tags.has("number"); +} + +// the ReturnStatement nodes of fn's own body (nested functions excluded) +function ownReturns(fnNode: e.Function): e.ReturnStatement[] { + const out: e.ReturnStatement[] = []; + const walk = (n: unknown): void => { + if (!n || typeof n !== "object") return; + if (Array.isArray(n)) { + for (const x of n) walk(x); + return; + } + const node = n as { type?: string } & Record; + if (typeof node.type !== "string") return; + if ( + node.type === "FunctionDeclaration" || + node.type === "FunctionExpression" || + node.type === "ArrowFunctionExpression" + ) + return; + if (node.type === "ReturnStatement") out.push(node as unknown as e.ReturnStatement); + for (const k of Object.keys(node)) { + if (k === "loc" || k === "range") continue; + walk(node[k]); + } + }; + walk(fnNode.body); + return out; +} + +// ops a specialized clone must not contain (they need the generic +// calling convention's argc/args/newTarget/this machinery) +const CLONE_FRAME_OPS = new Set([ + "args_obj", + "rest_args", + "new_target", + "construct_super", + "construct_super_apply", +]); + +interface CallSite { + call: Inst; + fn: Func; + rewritable: boolean; +} + +// find the Func containing an instruction's block (blocks know their fn) +function fnOf(inst: Inst): Func { + return inst.block!.fn; +} + +function uniqueCloneName(m: Module, base: string): string { + const names = new Set(m.functions.map((f) => f.name)); + let name = base; + for (let i = 1; names.has(name); i++) name = `${base}$${i}`; + return name; +} + +// is `a` (in block ba at index ia) before `b` (in bb at ib) under dom? +function comesBefore( + idom: Map, + a: Inst, + b: Inst +): boolean { + const ba = a.block!; + const bb = b.block!; + if (ba === bb) return ba.insts.indexOf(a) < bb.insts.indexOf(b); + return dominates(idom, ba, bb); +} + +export function specializeModule( + m: Module, + analysis: ScopeAnalysis, + oracle: TypeOracle, + this_module_info: { exports: Map } | null, + mod_ctx: ModCtx, + stats: SpecStats +): boolean { + // to a fixpoint: a freshly-lowered clone's body contains generic call + // sites of OTHER specializable functions (sum$typed still calls + // hypot2 through its slot) — each round re-enumerates over the module + // as it now stands and rewrites what became visible. `cloned` + // remembers per-function outcomes (SpecMode = clone shipped, null = + // clone rejected) so later rounds only add rewrites. + const cloned = new Map(); + let changedAny = false; + for (let round = 0; round < 5; round++) { + if (!specializeRound(m, analysis, oracle, this_module_info, mod_ctx, stats, cloned)) + break; + changedAny = true; + } + return changedAny; +} + +function specializeRound( + m: Module, + analysis: ScopeAnalysis, + oracle: TypeOracle, + this_module_info: { exports: Map } | null, + mod_ctx: ModCtx, + stats: SpecStats, + cloned: Map +): boolean { + const uses = usesInModule(m); + let toplevelFn: Func | null = null; + for (const info of analysis.fnInfos.values()) + if (info.isToplevel && info.fn) toplevelFn = info.fn; + + // %self slot -> stores/loads, and slot -> promoted? + const selfStores = new Map(); + const selfLoads = new Map(); + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.imms["module"] !== "%self") return; + const slot = inst.imms["slot"] as number; + if (inst.op === "module_slot_store") { + let l = selfStores.get(slot); + if (!l) selfStores.set(slot, (l = [])); + l.push(inst); + } else if (inst.op === "module_slot_load") { + let l = selfLoads.get(slot); + if (!l) selfLoads.set(slot, (l = [])); + l.push(inst); + } + }); + } + const promotedSlots = new Set(); + if (this_module_info) + this_module_info.exports.forEach((info) => { + if (info.promoted) promotedSlots.add(info.slot_num); + }); + + // per-function dominator trees, built lazily (only for functions that + // actually host slot-load rewrites) + const idoms = new Map>(); + const idomOf = (fn: Func): Map => { + let d = idoms.get(fn); + if (!d) { + const { rpo } = computeRPO(fn); + idoms.set(fn, (d = computeDominators(fn, rpo))); + } + return d; + }; + + // a plain closure-dispatch call using `v` as its callee? + const calleeUse = (u: Use): boolean => + u.user.op === "call" && u.operandIndex === 0 && !u.user.imms["direct"]; + + let changed = false; + + for (const info of analysis.fnInfos.values()) { + if (info.isToplevel || !info.lowered || !info.fn) continue; + const node = info.node; + + // a candidate this call already judged: null = clone was rejected + // (don't re-lower it every round); a SpecMode = clone exists, only + // NEW call sites (in later-lowered clone bodies) need rewriting + const priorSpec = cloned.get(info); + if (priorSpec === null) continue; + + if (priorSpec === undefined) { + // --- static callee checks (AST side) ----------------------------- + if (info.restBinding || info.usesArguments) continue; + if ((info.defaults || []).some((d) => d != null)) continue; + if (!node.params.every((p) => p.type === "Identifier")) continue; + + // --- type profile: every formal and return exactly {number} ------ + if (!node.params.every((p) => nodeIsNumber(oracle, p))) continue; + const returns = ownReturns(node); + if (returns.length === 0) continue; + if (!returns.every((r) => r.argument && nodeIsNumber(oracle, r.argument))) continue; + } + + // --- escape analysis (structural, oracle-free) ---------------------- + // every flow of the closure value must end in a plain-call callee + const closures: Inst[] = []; + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.op === "make_closure" && inst.imms["fn"] === info.name) + closures.push(inst); + }); + } + if (closures.length === 0) continue; // unreferenced (or already gone) + + const sites: CallSite[] = []; + let escapes = false; + for (const c of closures) { + for (const u of uses.get(c) || []) { + if (u.operandIndex === -1) { + escapes = true; // crosses a block boundary as an edge arg + break; + } + if (calleeUse(u)) { + sites.push({ + call: u.user, + fn: u.fn, + rewritable: !(u.user.targets && u.user.targets.length > 0), + }); + continue; + } + // the one non-callee flow we can fully enumerate: the + // single store into a promoted module-private slot + if ( + u.user.op === "module_slot_store" && + u.user.imms["module"] === "%self" && + u.operandIndex === 0 + ) { + const slot = u.user.imms["slot"] as number; + const stores = selfStores.get(slot) || []; + if (!promotedSlots.has(slot) || stores.length !== 1 || stores[0] !== u.user) { + escapes = true; + break; + } + const store = u.user; + const storeFn = u.fn; + // a store in the toplevel ENTRY block with no + // CALL-effect instruction before it is + // cross-function-safe: no user code can run before + // the slot is initialized, so no load anywhere can + // observe the pre-store state — except a load + // TEXTUALLY earlier in the entry block itself, which + // reads the uninitialized slot (the documented + // hoisting-lost semantics) and must stay generic. + let prefixSafe = false; + if (toplevelFn && storeFn === toplevelFn && store.block === toplevelFn.entry) { + prefixSafe = true; + for (const inst of toplevelFn.entry!.insts) { + if (inst === store) break; + if ((opInfo(inst.op).effects & Effect.CALL) !== 0) { + prefixSafe = false; + break; + } + } + } + let slotOk = true; + for (const load of selfLoads.get(slot) || []) { + for (const lu of uses.get(load) || []) { + if (lu.operandIndex === -1 || !calleeUse(lu)) { + slotOk = false; + break; + } + // rewrite where the load provably yields this + // closure: after a prefix-safe store, any load + // except one earlier in the same entry block; + // otherwise same-function store-dominated only + // (elsewhere the generic slot path stands) + const loadFn = fnOf(load); + const orderOk = prefixSafe + ? !( + load.block === store.block && + store.block!.insts.indexOf(load) < + store.block!.insts.indexOf(store) + ) + : loadFn === storeFn && + comesBefore(idomOf(storeFn), store, load); + const rewritable = + orderOk && !(lu.user.targets && lu.user.targets.length > 0); + sites.push({ call: lu.user, fn: lu.fn, rewritable }); + } + if (!slotOk) break; + } + if (!slotOk) { + escapes = true; + break; + } + continue; + } + escapes = true; + break; + } + if (escapes) break; + } + if (escapes || sites.length === 0) continue; + + let spec: SpecMode; + if (priorSpec) { + spec = priorSpec; // clone already shipped in an earlier round + } else { + // --- lower the clone (unguarded body, typed sig) ---------------- + spec = { + cloneName: uniqueCloneName(m, `${info.name}$typed`), + formals: node.params.map(() => "f64" as const), + result: "f64", + }; + const clone = lowerSpecializedClone(info, analysis, m, mod_ctx, spec); + + // --- structural post-checks (trust-free backstop) --------------- + // the clone must actually honor the signature: env/this unused, + // no frame ops, every return raw f64. anything else discards it. + const cloneUses = new Map(); + let ok = true; + clone.forEachInst((inst) => { + if (CLONE_FRAME_OPS.has(inst.op)) ok = false; + if (inst.op === "return" && inst.operands[0]!.type !== "f64") ok = false; + for (const o of inst.operands) cloneUses.set(o, (cloneUses.get(o) || 0) + 1); + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) + if (a) cloneUses.set(a, (cloneUses.get(a) || 0) + 1); + }); + const envParam = clone.entry!.params[0]!; + const thisParam = clone.entry!.params[1]!; + // the entry box_f64 of each formal is the formal's ONLY allowed + // use shape; env/this must be entirely unused + if ((cloneUses.get(envParam) || 0) > 0) ok = false; + if ((cloneUses.get(thisParam) || 0) > 0) ok = false; + if (!ok) { + stats.rejected++; + cloned.set(info, null); + continue; + } + m.addFunction(clone); + cloned.set(info, spec); + stats.specialized++; + changed = true; + } + + // --- rewrite the provably-known call sites -------------------------- + for (const site of sites) { + if (!site.rewritable) continue; + const call = site.call; + const g = site.fn; + const args = call.operands.slice(2); + if (args.length !== spec.formals.length) continue; + const block = call.block!; + const at = block.insts.indexOf(call); + if (at < 0) continue; + + const insts: Inst[] = []; + const envArg = new Inst(g, "const", [], { kind: "undefined" }); + insts.push(envArg); + const unboxed = args.map((a) => { + const u = new Inst(g, "unbox_f64", [a], {}); + insts.push(u); + return u; + }); + const direct = new Inst(g, "call_typed", [envArg, ...unboxed], { + fn: spec.cloneName, + }); + direct.type = "f64"; + insts.push(direct); + const boxed = new Inst(g, "box_f64", [direct], {}); + insts.push(boxed); + for (const i of insts) i.block = block; + block.insts.splice(at, 0, ...insts); + + // point every consumer at the re-boxed result, then drop the + // generic call (its callee/`this` operands lose their last use + // and fall to DCE where possible) + replaceCallWith(g, call, boxed); + stats.sites++; + changed = true; + } + } + return changed; +} + +function replaceCallWith(fn: Func, call: Inst, replacement: Inst): void { + fn.forEachInst((inst) => { + if (inst === replacement) return; + for (let i = 0; i < inst.operands.length; i++) + if (inst.operands[i] === call) inst.operands[i] = replacement; + if (inst.targets) + for (const t of inst.targets) + for (let i = 0; i < t.args.length; i++) + if (t.args[i] === call) t.args[i] = replacement; + }); + const b = call.block!; + const idx = b.insts.indexOf(call); + if (idx >= 0) b.insts.splice(idx, 1); + call.block = null; +} diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index a563d676..4e85907a 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -10,9 +10,11 @@ import { FunctionBuilder } from "./builder"; import { printFunction, printModule } from "./printer"; import { verifyFunction, verifyModule } from "./verifier"; -import { lowerFunctionNode, lowerProgram } from "./lower"; -import { optimizeFunction } from "./optimize"; +import { lowerFunctionNode, lowerProgram, lowerAnalyzedFunction } from "./lower"; +import { optimizeFunction, optimizeModule } from "./optimize"; import type { OptStats } from "./optimize"; +import { specializeModule } from "./specialize"; +import { ScopeAnalysis } from "./scopes"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; @@ -1696,6 +1698,256 @@ test("verifier: a boxed arg into a rawJoin f64 param is rejected", () => { assertVerifyFails(fb.finish(), "f64 param"); }); +// --- Phase 3.6: typed calling convention / function specialization --------------- + +// mirror integrate.ts's ordering: lower, optimize, specialize, re-optimize +function specHarness(src: string, oracle: TypeOracle) { + const analysis = new ScopeAnalysis(); + const info = analysis.analyzeFunction(parseFn(src)); + const module = new Module("m"); + const mod_ctx = { + refs: new Map(), + oracle: oracle, + typed_stats: { diamonds: 0, trusted: 0 }, + }; + const fn = lowerAnalyzedFunction(info, analysis, module, mod_ctx); + verifyModule(module); + optimizeModule(module); + verifyModule(module); + const stats = { specialized: 0, sites: 0, rejected: 0 }; + const changed = specializeModule(module, analysis, oracle, null, mod_ctx, stats); + verifyModule(module); + if (changed) { + optimizeModule(module); + verifyModule(module); + } + return { module: module, outer: fn, stats: stats }; +} + +// a loop keeps the callee out of the EIR inliner's single-block reach, so +// specialization (not inlining) must claim the call sites +const SPEC_KERNEL = + "function k(n) { var s = 0; var i = 0; while (i < n) { s = s + i; i = i + 1; } return s; }"; + +test("specialize: local closed world clones and rewrites call sites", () => { + const { module, outer, stats } = specHarness( + `function outer() { ${SPEC_KERNEL} var r = k(10) + k(20); return r; }`, + numericStubOracle(["n", "s", "i", "r"]) + ); + assert(stats.specialized === 1, `specialized=${stats.specialized}`); + assert(stats.sites === 2, `sites=${stats.sites}`); + assert(stats.rejected === 0, `rejected=${stats.rejected}`); + const clone = module.functions.find((f) => f.name.indexOf("$typed") !== -1); + assert(clone !== undefined, "clone emitted"); + assert(clone!.sig !== null && clone!.sig.result === "f64", "clone sig is f64-result"); + assert(clone!.sig!.formals.length === 1 && clone!.sig!.formals[0] === "f64", "f64 formal"); + // unguarded, slow-path-free body: no tag checks, no generic arithmetic + assert(countOps(clone!, "has_tag") === 0, "clone carries no guards"); + assert(countOps(clone!, "add") === 0, "clone carries no generic ops"); + assert(countOps(clone!, "f64_add") >= 1, "clone computes raw"); + // every return is the raw f64 (printer shows the typed header) + assertContains(printFunction(clone!), "): f64 {"); + // callers: both sites direct, generic dispatch and dead closure gone + assert(countOps(outer, "call_typed") === 2, `call_typed=${countOps(outer, "call_typed")}`); + assert(countOps(outer, "call") === 0, "no generic calls remain"); + assert(countOps(outer, "make_closure") === 0, "dead closure swept"); +}); + +test("specialize: escaping closures are rejected even when the oracle lies", () => { + // three escapes: as a return value, into an object literal, as a call + // argument. The (stub) oracle types everything {number} — a wrong + // oracle must not widen what specializes; the STRUCTURAL escape + // analysis rejects each one. + for (const src of [ + `function outer() { ${SPEC_KERNEL} var r = k(1); return k; }`, + // NB: the object must stay LIVE — a dead `{ m: k }` is sunk by the + // optimizer before specialization runs, and an eliminated escape + // is correctly no escape at all + `function outer() { ${SPEC_KERNEL} var o = { m: k }; var r = k(1); return o; }`, + `function outer(h) { ${SPEC_KERNEL} var r = h(k) + k(1); return r; }`, + ]) { + const { stats } = specHarness(src, numericStubOracle(["n", "s", "i", "r"])); + assert(stats.specialized === 0, `specialized=${stats.specialized} for ${src}`); + assert(stats.rejected === 0, `rejected=${stats.rejected} for ${src}`); + } +}); + +test("specialize: env capture and `this` are structurally rejected post-lowering", () => { + // k reads the enclosing c: its clone must load the env it was never + // given — discarded by the envParam post-check, not by the oracle + const cap = specHarness( + `function outer(c) { function k(n) { var s = 0; while (s < n) { s = s + c; } return s; } var r = k(10); return r; }`, + numericStubOracle(["n", "s", "c", "r"]) + ); + assert(cap.stats.specialized === 0, `specialized=${cap.stats.specialized}`); + assert(cap.stats.rejected === 1, `rejected=${cap.stats.rejected}`); + // `this` use survives the (lying) type gate; the thisParam post-check + // discards the clone + const ths = specHarness( + `function outer() { function k(n) { var s = this.z; while (s < n) { s = s + 1; } return s; } var r = k(10); return r; }`, + numericStubOracle(["n", "s", "r"]) + ); + assert(ths.stats.specialized === 0, `specialized=${ths.stats.specialized}`); + assert(ths.stats.rejected === 1, `rejected=${ths.stats.rejected}`); +}); + +test("specialize: non-numeric profiles and non-value returns disqualify early", () => { + for (const [src, names] of [ + // a bare `return;` — no f64 result to promise + [ + `function outer() { function k(n) { var s = 0; while (s < n) { s = s + 1; } if (s < 0) return; return s; } var r = k(5); return r; }`, + ["n", "s", "r"], + ], + // params not provably {number} + [ + `function outer() { ${SPEC_KERNEL} var r = k(10); return r; }`, + ["s", "i", "r"], // n missing: top + ], + // arguments-object use + [ + `function outer() { function k(n) { var s = arguments.length; while (s < n) { s = s + 1; } return s; } var r = k(5); return r; }`, + ["n", "s", "r"], + ], + ] as [string, string[]][]) { + const { stats } = specHarness(src, numericStubOracle(names)); + assert(stats.specialized === 0, `specialized=${stats.specialized} for ${src}`); + } +}); + +test("specialize: arity-mismatched sites keep the generic path", () => { + // k(10, 99) passes an extra arg: still an enumerated site (correct to + // leave generic), so the clone ships and only the exact-arity site + // rewrites — the closure must SURVIVE for the generic site + const { module, outer, stats } = specHarness( + `function outer() { ${SPEC_KERNEL} var r = k(10) + k(20, 99); return r; }`, + numericStubOracle(["n", "s", "i", "r"]) + ); + assert(stats.specialized === 1, `specialized=${stats.specialized}`); + assert(stats.sites === 1, `sites=${stats.sites}`); + assert(countOps(outer, "call_typed") === 1, "one direct site"); + assert(countOps(outer, "call") === 1, "one generic site survives"); + assert(countOps(outer, "make_closure") === 1, "closure still needed"); + assert(module.functions.some((f) => f.sig !== null), "clone present"); +}); + +test("verifier: an f64 entry param requires a matching sig", () => { + const fb = new FunctionBuilder("sigless", ["%env", "%this", "x"]); + const x = fb.fn.entry!.params[2]!; + x.type = "f64"; + fb.ret(fb.constUndefined()); + assertVerifyFails(fb.finish(), "rawJoin"); + + const fb2 = new FunctionBuilder("sigged", ["%env", "%this", "x"]); + fb2.fn.sig = { formals: ["f64"], result: "any" }; + const x2 = fb2.fn.entry!.params[2]!; + x2.type = "f64"; + fb2.ret(fb2.emit("box_f64", [x2], {})); + verifyFunction(fb2.finish()); +}); + +test("verifier: an f64-result function must return raw f64", () => { + const fb = new FunctionBuilder("f64ret", ["%env", "%this", "x"]); + fb.fn.sig = { formals: ["f64"], result: "f64" }; + fb.fn.entry!.params[2]!.type = "f64"; + fb.ret(fb.constUndefined()); + assertVerifyFails(fb.finish(), "f64-result"); +}); + +test("verifier: call_typed is checked against the callee sig", () => { + const mkCallee = (): Func => { + const fb = new FunctionBuilder("callee$typed", ["%env", "%this", "x"]); + fb.fn.sig = { formals: ["f64"], result: "f64" }; + const x = fb.fn.entry!.params[2]!; + x.type = "f64"; + fb.ret(fb.emit("f64_add", [x, x], {})); + return fb.finish(); + }; + const mkCaller = (argIsRaw: boolean, resultType: string, calleeName: string): Func => { + const fb = new FunctionBuilder("caller", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const env = fb.constUndefined(); + const arg = argIsRaw ? fb.emit("unbox_f64", [a], {}) : a; + const ct = fb.emit("call_typed", [env, arg], { fn: calleeName }); + ct.type = resultType; + fb.ret(fb.emit("box_f64", [ct], {})); + return fb.finish(); + }; + const assertModuleFails = (m: Module, needle: string): void => { + try { + verifyModule(m); + } catch (err) { + const msg = (err as Error).message; + if (msg.indexOf(needle) === -1) + throw new Error(`verifier failed, but with '${msg}' (wanted '${needle}')`); + return; + } + throw new Error(`verifier accepted a bad call_typed (wanted '${needle}')`); + }; + + // well-typed: passes + const ok = new Module("ok"); + ok.addFunction(mkCallee()); + ok.addFunction(mkCaller(true, "f64", "callee$typed")); + verifyModule(ok); + + // boxed arg into an f64 formal + const bad1 = new Module("bad1"); + bad1.addFunction(mkCallee()); + bad1.addFunction(mkCaller(false, "f64", "callee$typed")); + assertModuleFails(bad1, "wants f64"); + + // stamped result type contradicts the callee sig + const bad2 = new Module("bad2"); + bad2.addFunction(mkCallee()); + const wrongResult = (() => { + const fb = new FunctionBuilder("caller2", ["%env", "%this", "a"]); + const a = fb.readVariable("a", fb.cur); + const arg = fb.emit("unbox_f64", [a], {}); + const ct = fb.emit("call_typed", [fb.constUndefined(), arg], { fn: "callee$typed" }); + // ct.type left "any": lies about the f64 result + fb.ret(ct); + return fb.finish(); + })(); + bad2.addFunction(wrongResult); + assertModuleFails(bad2, "result type"); + + // unknown callee + const bad3 = new Module("bad3"); + bad3.addFunction(mkCaller(true, "f64", "nowhere$typed")); + assertModuleFails(bad3, "unknown function"); +}); + +test("opt: unbox_f64 of a number const folds to f64_const", () => { + const fb = new FunctionBuilder("cfold", ["%env", "%this"]); + const c = fb.constNumber(2); + const u = fb.emit("unbox_f64", [c], {}); + const v = fb.emit("f64_add", [u, u], {}); + fb.ret(fb.emit("box_f64", [v], {})); + const fn = fb.finish(); + verifyFunction(fn); + const s = optimizeFunction(fn); + verifyFunction(fn); + assert(s.unbox_folds === 1, `unbox_folds=${s.unbox_folds}`); + assert(countOps(fn, "f64_const") === 1, "raw const minted"); + assert(countOps(fn, "unbox_f64") === 0, "unbox gone"); +}); + +test("opt: constant boolean edges thread past to_boolean re-tests", () => { + // the `<` diamond's fast arm: after threading, its constant edges + // branch directly and only the slow (generic) edge still re-tests + const r = lowerFunctionNode( + parseFn("function f(x, y) { if (x < y) { return 1; } return 2; }"), + undefined, + numericStubOracle(["x", "y"]) + ); + verifyModule(r.module); + const s = optimizeFunction(r.fn, r.module); + verifyFunction(r.fn); + assert(s.joins_threaded === 2, `joins_threaded=${s.joins_threaded}`); + // the join survives for the slow arm's boxed value, still re-tested + assert(countOps(r.fn, "to_boolean") === 1, "slow-arm re-test survives"); +}); + // --- oracle: TypeSig -> EirType mapping ----------------------------------------- test("oracle: TypeSig constituents map to EirType tags", () => { diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index 71e90f66..b275c791 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -88,7 +88,7 @@ export function dominates(idom: Map, a: Block, b: Block): boolean } } -export function verifyFunction(fn: Func): boolean { +export function verifyFunction(fn: Func, mod?: Module): boolean { const vname = (v: Inst | null | undefined) => (v ? `%v${v.id}` : ""); const fail = (msg: string, inst?: Inst): never => { let where = ""; @@ -216,10 +216,23 @@ export function verifyFunction(fn: Func): boolean { // rejected below — and an f64 value can never be *treated as* an // ejsval in a handler (or anywhere), because every ejsval-taking // slot and every boxed param rejects f64-typed operands/args. + // Phase 3.6's SECOND controlled exception: a specialized clone's + // ENTRY blockparam is f64 exactly when the function's sig types + // the matching formal f64 (env/this stay boxed); its `return` + // operand type must equal the sig's result; and every call_typed + // is re-checked against the callee Func's sig below (module-level, + // when the module is available). const isRaw = (t: string) => t === "f64" || t === "i1"; + const sigParamType = (b: Block, p: Inst): "any" | "f64" | null => { + if (b !== fn.entry || !fn.sig) return null; + const formalIdx = p.paramIndex - 2; // entry params: [%env, %this, ...formals] + if (formalIdx < 0 || formalIdx >= fn.sig.formals.length) return null; + return fn.sig.formals[formalIdx]!; + }; for (const b of fn.blocks) { if (!reachable.has(b)) continue; for (const p of b.params) { + if (p.type === "f64" && sigParamType(b, p) === "f64") continue; // typed formal if (p.type === "f64") { if (!p.rawJoin) fail(`f64 block param without the optimizer's rawJoin marker`, p); @@ -238,20 +251,9 @@ export function verifyFunction(fn: Func): boolean { } for (const inst of b.insts) { const info = opInfo(inst.op); - inst.operands.forEach((o, idx) => { - const want = info.sig ? info.sig.params[idx] : undefined; - if (want === "f64") { - if (o.type !== "f64") - fail(`'${inst.op}' operand ${idx} wants f64, got ${o.type}`, inst); - } else if (want === "ejsval") { - if (isRaw(o.type)) - fail(`'${inst.op}' operand ${idx} wants a boxed value, got ${o.type}`, inst); - } else if (inst.op === "cond_br" && idx === 0) { - if (o.type === "f64") fail("cond_br condition may not be f64", inst); - } else if (isRaw(o.type)) { - fail(`'${inst.op}' operand ${idx} may not be ${o.type}`, inst); - } - }); + + // branch-edge arguments (checked FIRST: the op-specific cases + // below `continue` past the operand rules) if (inst.targets) for (const t of inst.targets) t.args.forEach((a, i) => { @@ -275,6 +277,72 @@ export function verifyFunction(fn: Func): boolean { ); } }); + + // Phase 3.6: call_typed is typed by its CALLEE's sig, which a + // per-op table can't express. operand 0 (env) stays boxed; + // the argument slots must match the callee's formals exactly, + // and the instruction's stamped result type must equal the + // callee sig's result. Without a module (standalone + // verifyFunction) the callee can't be resolved; the boxed-env + // and no-i1 rules still hold. + if (inst.op === "call_typed") { + const calleeName = inst.imms["fn"] as string; + const callee = mod ? mod.functions.find((f) => f.name === calleeName) : undefined; + if (mod) { + if (!callee) fail(`call_typed to unknown function '${calleeName}'`, inst); + if (!callee!.sig) fail(`call_typed to un-sigged function '${calleeName}'`, inst); + const formals = callee!.sig!.formals; + if (inst.operands.length - 1 !== formals.length) + fail( + `call_typed passes ${inst.operands.length - 1} args, ` + + `callee sig wants ${formals.length}`, + inst + ); + const wantResult = callee!.sig!.result === "f64" ? "f64" : "any"; + if (inst.type !== wantResult) + fail(`call_typed result type ${inst.type} != callee sig ${wantResult}`, inst); + } + inst.operands.forEach((o, idx) => { + if (idx === 0) { + if (isRaw(o.type)) + fail(`call_typed env operand must be boxed, got ${o.type}`, inst); + return; + } + if (o.type === "i1") fail(`call_typed operand ${idx} may not be i1`, inst); + if (callee && callee.sig) { + const want = callee.sig.formals[idx - 1]!; + if (want === "f64" ? o.type !== "f64" : isRaw(o.type)) + fail( + `call_typed operand ${idx} wants ${want}, got ${o.type}`, + inst + ); + } + }); + continue; + } + // Phase 3.6: a sigged function's `return` must produce exactly + // the sig's result type (f64 result -> raw f64 operand) + if (inst.op === "return" && fn.sig && fn.sig.result === "f64") { + const o = inst.operands[0]!; + if (o.type !== "f64") + fail(`return in an f64-result function got ${o.type}`, inst); + continue; + } + + inst.operands.forEach((o, idx) => { + const want = info.sig ? info.sig.params[idx] : undefined; + if (want === "f64") { + if (o.type !== "f64") + fail(`'${inst.op}' operand ${idx} wants f64, got ${o.type}`, inst); + } else if (want === "ejsval") { + if (isRaw(o.type)) + fail(`'${inst.op}' operand ${idx} wants a boxed value, got ${o.type}`, inst); + } else if (inst.op === "cond_br" && idx === 0) { + if (o.type === "f64") fail("cond_br condition may not be f64", inst); + } else if (isRaw(o.type)) { + fail(`'${inst.op}' operand ${idx} may not be ${o.type}`, inst); + } + }); } } @@ -282,6 +350,6 @@ export function verifyFunction(fn: Func): boolean { } export function verifyModule(mod: Module): boolean { - for (const fn of mod.functions) verifyFunction(fn); + for (const fn of mod.functions) verifyFunction(fn, mod); return true; } diff --git a/test/types/README.md b/test/types/README.md index 6f713e09..9653ad64 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -1,7 +1,8 @@ -# --types probe census (Phase 3) +# --types probe census (Phase 3 / Phase 3.6) Probe files for the oracle-guided typed-arithmetic fast path -(docs/maam-plan.md, Phase 3). Like `test/modernization/`, these live +(docs/maam-plan.md, Phase 3) and for function specialization +(Phase 3.6). Like `test/modernization/`, these live OUTSIDE the tester's `*.js` discovery glob in `test/` itself (subdirectories are not scanned) and are runnable standalone: compile one with the node-hosted compiler and `--types`, run it, and diff stdout @@ -24,6 +25,9 @@ Census as of 2026-07-22 (echojs @ 568efc7, maam @ 8d6a157): | types-loops1 | for/while counters, `<` in loop conditions | 6 | match | | types-wrongoracle1 | the wrong-oracle guard: lib.js types `inc`'s param {number} from its only local call, main calls `inc("x")` cross-module → slow path, "x1" | 1 (in lib) | n/a¹ | | types-bench1 | the Phase 3 microbenchmark kernel (adds/muls/divs/compares over typed locals) | 9 | match | +| types-spec1 | Phase 3.6 specialization: module-local looping kernel → f64(f64) clone, exact-arity sites rewritten to call_typed (`specialized=1 specSites=2`); the extra-arg site stays generic | 6 | match | +| types-spec2 | Phase 3.6 cross-function specialization (the hypot2-demo shape): hypot2 called only inside sum, prefix-safe toplevel slot stores → both clone, all four sites rewrite incl. the one inside sum$typed (`specialized=2 specSites=4`) | 7 | match | +| types-specescape1 | Phase 3.6 escape rejection: f LOOKS numeric-closed but its closure is passed as a call argument → NOT specialized (no `specialized=` in stats); the escaped call feeds a string through the generic path | 2 | match | ¹ node cannot execute this file's bare-ESM import layout from test/; the check here is flag-off vs `--types` executables producing identical diff --git a/test/types/types-spec1.js b/test/types/types-spec1.js new file mode 100644 index 00000000..f27a2be3 --- /dev/null +++ b/test/types/types-spec1.js @@ -0,0 +1,19 @@ +// Phase 3.6 probe: function specialization. kernel is module-local +// (promoted slot, never exported), numeric-only, and too big for EIR +// inlining (multi-block loop) — the local-closed-world analysis clones +// it as f64(f64) and rewrites the exact-arity toplevel call sites to +// call_typed. The extra-arg site stays on the generic path (still +// enumerated, still correct). specialized=1 specSites=2. +function kernel(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + i * i - i / 2; + i = i + 1; + } + return s; +} +var a = kernel(10); +var b = kernel(20); +var c = kernel(30, 99); // extra arg: generic site +console.log(a + ":" + b + ":" + c); diff --git a/test/types/types-spec2.js b/test/types/types-spec2.js new file mode 100644 index 00000000..7188ceba --- /dev/null +++ b/test/types/types-spec2.js @@ -0,0 +1,16 @@ +// Phase 3.6 probe: CROSS-FUNCTION specialization (the hypot2-demo +// shape). Both functions are module-local; hypot2's only calls live +// inside sum, whose slot store sits in the toplevel entry prefix (no +// CALL-effect instruction before it), so the cross-function loads +// rewrite too — including the one inside sum's own clone (the pass's +// fixpoint round). specialized=2 specSites=4 (two toplevel sum calls, +// hypot2 in generic sum, hypot2 in sum$typed). +function hypot2(a, b) { + return a * a + b * b; +} +function sum(n) { + var total = 0; + for (var i = 0; i < n; i = i + 1) total = total + hypot2(i, i + 1); + return total; +} +console.log(sum(1000) + ":" + sum(2000)); diff --git a/test/types/types-specescape1.js b/test/types/types-specescape1.js new file mode 100644 index 00000000..57386f8c --- /dev/null +++ b/test/types/types-specescape1.js @@ -0,0 +1,23 @@ +// Phase 3.6 probe: the wrong-oracle discipline for specialization. f +// LOOKS closed-world numerically (all direct calls pass numbers), but +// its closure also escapes as a call ARGUMENT — the structural escape +// analysis must reject it (specialized=0), leaving every call on the +// guarded/generic path. Behavior must be identical to flag-off; note +// via() really does call f with a string, which the generic path +// handles (numeric string concat semantics preserved). +function f(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + i; + i = i + 1; + } + return s; +} +function via(g, x) { + return g(x); +} +var direct = f(10); +var indirect = via(f, 5); +var mixed = via(f, "3"); // a string reaches f only through the escape +console.log(direct + ":" + indirect + ":" + mixed); From f0a5ca386f2c898eae066e1e677de4f4b326c1e5 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 18:22:30 -0700 Subject: [PATCH 103/146] eir: P3.6 clones drop the dead env argument (signature = formals alone) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The specialization post-checks already guarantee a clone touches neither env nor `this`, so neither deserves an argument slot: sigged functions now emit as `double(double...)` and call_typed skips its EIR-level env operand (the EIR op keeps the uniform [env, ...args] shape and the verifier's boxed-env rule — only emission changes). %env/%this entry params are left unbound in the clone prologue, so any stray use fails loudly at val(). Saves an argument register plus a NaN-boxed-undefined materialization at every out-of-line call site; LLVM's O2 pipeline demonstrably does not dead-arg-eliminate internal functions, so it never came out in the wash. When env-USING clones arrive (captured-state specialization / export-boundary wrappers), Func.sig grows an env flag and the emitter consults it; today sigged => no env arg is the rule. Gates re-run: //:test-eir green, full matrix green, --types diff lane 0-divergent, spec probes + demo byte-identical to node. Co-Authored-By: Claude Fable 5 --- docs/maam-p0-results.md | 12 +++++++---- lib/eir/emit.ts | 46 ++++++++++++++++++++++++----------------- 2 files changed, 35 insertions(+), 23 deletions(-) diff --git a/docs/maam-p0-results.md b/docs/maam-p0-results.md index a818fe42..c5e73b3a 100644 --- a/docs/maam-p0-results.md +++ b/docs/maam-p0-results.md @@ -845,9 +845,13 @@ claim is fenced by structural, oracle-free machinery: caller-unboxed direct calls (`specSites`); everything else stays on the generic path (still enumerated — correctness never depends on rewriting). The emitter gives sigged clones a NATIVE signature — - `double(EjsValue env, double...)`, internal linkage, no - closure-dispatch interop — which is what finally lets LLVM inline and - scalar-optimize through the call. + `double(double...)`: the formals ALONE, since the post-checks + guarantee env and `this` are unused, neither gets an argument slot + (call_typed's EIR-level env operand is simply not emitted; LLVM's O2 + pipeline demonstrably does not dead-arg-eliminate internal functions, + so we do it) — internal linkage, no closure-dispatch interop — which + is what finally lets LLVM inline and scalar-optimize through the + call. - **Three trust-free optimizer additions** (they fire wherever their structural proofs hold, oracle or not): `unbox_f64(box_f64(x)) → x` and `unbox_f64(const n) → f64_const n` annihilation; const-number @@ -915,7 +919,7 @@ updated in test/types/README.md: ## Microbenchmark (types-bench1, deltas vs Phase 3 / 3.4) Same kernel, same protocol (7× interleaved, /usr/bin/time -p). The -kernel now compiles to: a specialized `double kernel$typed(env, double)` +kernel now compiles to: a specialized `double kernel$typed(double)` clone whose loop is raw f64 end-to-end (f64 loop-carried params via the const-root extension, f64_consts, comparison threaded straight to the branch — no box, no guard, no runtime call in the body), LLVM-inlined diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index b98375ea..22f6f064 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -147,14 +147,19 @@ export class EIREmitter { let llvm_fn; if (fn.sig) { // Phase 3.6 specialized clone: a native unboxed signature - // — (env, double...) -> double — instead of the runtime's - // boxed (env, this*, argc, argv*, newTarget) convention. - // Internal-linkage, direct-call-only (call_typed), so no - // takes_builtins and no closure-dispatch interop; this is - // what finally lets LLVM inline and scalar-optimize - // through the call. - const param_types = [this.abi.ejs_params[0]!.llvm_type].concat( - fn.sig.formals.map((f) => (f === "f64" ? types.Double : types.EjsValue)) + // — (double...) -> double — instead of the runtime's boxed + // (env, this*, argc, argv*, newTarget) convention. The + // specialization post-checks guarantee the clone touches + // neither env nor `this`, so NEITHER gets an argument slot + // (the EIR-level %env operand of call_typed is simply not + // emitted) — one less register at every out-of-line call + // site, and LLVM's O2 pipeline demonstrably does not + // dead-arg-eliminate it for us. Internal-linkage, + // direct-call-only (call_typed), so no takes_builtins and + // no closure-dispatch interop; this is what finally lets + // LLVM inline and scalar-optimize through the call. + const param_types = fn.sig.formals.map((f) => + f === "f64" ? types.Double : types.EjsValue ); const ret_type = fn.sig.result === "f64" ? types.Double : types.EjsValue; llvm_fn = this.abi.createFunction(this.module, llvm_name, ret_type, param_types); @@ -197,10 +202,11 @@ export class EIREmitter { llvmFn.literalAllocas = Object.create(null); const args = llvmFn.args; - const env = args[0]!; - // Phase 3.6 clones have no this*/argc/argv*/newTarget — the - // specialization pass guarantees no op that needs them survives - // (frame ops, this-uses, and generic returns all discard a clone) + // Phase 3.6 clones have no env/this*/argc/argv*/newTarget — their + // llvm args are the formals alone; the specialization pass + // guarantees no op that needs the frame values survives (frame + // ops, env/this uses, and generic returns all discard a clone) + const env = eirFn.sig ? undefined! : args[0]!; const this_ptr = eirFn.sig ? undefined! : args[1]!; const argc = eirFn.sig ? undefined! : args[2]!; const args_ptr = eirFn.sig ? undefined! : args[3]!; @@ -262,15 +268,15 @@ export class EIREmitter { ir.setInsertPoint(prologue_bb); const entry_params = eirFn.entry!.params; // params[0] = %env, params[1] = %this, rest are JS formals - if (entry_params.length > 0) this.values.set(entry_params[0]!, env); if (eirFn.sig) { // typed convention: formals arrive directly (raw doubles for - // f64 formals) at llvm args [1..]; %this is required-unused — - // bind undefined so a stray use fails loudly downstream - if (entry_params.length > 1) this.values.set(entry_params[1]!, this.undef()); + // f64 formals) at llvm args [0..]. %env and %this have NO + // argument slots and are required-unused — left unbound, so a + // stray use fails loudly at val() for (let i = 2; i < entry_params.length; i++) - this.values.set(entry_params[i]!, args[i - 1]!); + this.values.set(entry_params[i]!, args[i - 2]!); } else { + if (entry_params.length > 0) this.values.set(entry_params[0]!, env); if (entry_params.length > 1) { let this_val = ir.createLoad(types.EjsValue, this_ptr, "this"); this.values.set(entry_params[1]!, this_val); @@ -726,11 +732,13 @@ export class EIREmitter { case "call_typed": { // Phase 3.6: direct call to a specialized clone — args are // raw machine values in registers, no scratch spill, no - // closure dispatch + // closure dispatch. Operand 0 (the EIR-level env slot) is + // NOT passed: clone signatures carry the formals alone + // (env is required-unused by the specialization checks) const target = this.llvm_fns.get(inst.imms["fn"] as string); if (!target) throw new Error(`EIR emit: unknown call_typed callee ${String(inst.imms["fn"])}`); - const argv = inst.operands.map((o) => this.val(o)); + const argv = inst.operands.slice(1).map((o) => this.val(o)); return this.emitCallLike(inst, target, argv, "tcall"); } case "construct": { From c0bad46fb5930066ae570e96da11005fbb189576 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 19:29:07 -0700 Subject: [PATCH 104/146] eir: P4.0 shapes design doc (docs/shapes-plan.md) The maam-plan P4 deliverable (scoped design-doc-only), written now that Phase 3 has proven the pipeline, and jointly with gc-plan's header/ object-model future per its "one design, written once" rule. Core decisions: type-aware runtime shape tree mirroring maam's classes 1:1 (representation in the class identity -- a passed has_shape proves offset AND repr, feeding the P3 raw-f64 machinery); insertion-ordered runtime shapes as ordered witnesses of maam's order-insensitive classes; global interned shape table with module-init guard interning (atom-table precedent); slot-array object layout with dictionary-mode fallback for every exotic path (delete/defineProperty/accessors/ symbols/freeze/cap overflow), written against gc-P1's widened header (24 bits + mode bit, one atomic layout change whichever plan starts first); has_shape/slot_load/slot_store/make_object_shaped EIR ops with the verifier's NEW effect-kill soundness class (shape facts die at WRITE|CALL effects -- the P4.3 adversarial-review focus); promotion criteria = the P3 trust ladder transplanted (guarded by default, exact facts only, unguarded born-with-shape only behind P3.6-style structural fences with the differential harness's shapes lane as hard precondition); node-identity oracle queries as the maam prerequisite; P4.1-P4.6 phased checklist with gates, owned by shapes-plan.md. maam-plan P4 ticked; gc-plan section 'Object header, forwarding, and shapes' cross-referenced. Co-Authored-By: Claude Fable 5 --- docs/gc-plan.md | 5 +- docs/maam-plan.md | 17 +- docs/shapes-plan.md | 568 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 588 insertions(+), 2 deletions(-) create mode 100644 docs/shapes-plan.md diff --git a/docs/gc-plan.md b/docs/gc-plan.md index 94e0b164..eeabbe91 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -317,7 +317,10 @@ and the GC's object layout are **one design, written once**: This plan's P1 header change reserves the bits; the shapes design doc (maam P4) fills them in. The GC must not ship a header layout that shapes then has -to break. +to break. [Update 2026-07-23: that design now exists — **docs/shapes-plan.md** +— written against this section's layout; its Step A claims 24 bits + a mode +bit of the widened header for the shape index, and its P4.1 lands jointly +with this plan's P1 as the one atomic layout change, whichever starts first.] Per-kind moving notes: `EJSObject` copies as a struct (the property map, while it still exists, is malloc'd and stays put); envs copy header+slots with each diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 8937927d..70b52bd9 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -552,5 +552,20 @@ Smaller forward items surfaced by the Chunk A integration review: loop (before/after regenerated in ~/src/echojs/hypot2-types-before-after.txt). Details in docs/maam-p0-results.md "Phase 3.6 gates". -- [ ] **P4** (design doc only) shape-guarded property access: guard op, +- [x] **P4** (design doc only) shape-guarded property access: guard op, runtime layout, promotion criteria from Phase 3 experience. + Delivered as **docs/shapes-plan.md** (2026-07-23): type-aware + runtime shape tree mirroring maam's classes 1:1 (representation in + the class identity — a passed guard proves offset AND repr, feeding + the P3 raw-f64 machinery), slot-array object layout with + dictionary-mode fallback for every exotic path, has_shape/ + slot_load/slot_store/make_object_shaped EIR ops with the verifier's + new effect-kill soundness class, node-identity oracle queries + (layoutOfNode/constructorReportOfNode/receiverShapesOfNode) as the + maam-side prerequisite, promotion criteria distilled from the P3 + trust ladder (guarded by default; exact facts only; unguarded only + behind P3.6-style structural fences with the differential + harness's shapes lane as hard precondition), joint header layout + with gc-plan P1, and the P4.1–P4.6 implementation checklist with + gates — that checklist lives in shapes-plan.md, which owns the + phase from here. diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md new file mode 100644 index 00000000..2a872676 --- /dev/null +++ b/docs/shapes-plan.md @@ -0,0 +1,568 @@ +# Shapes: shape-guarded property access, co-designed with the GC (maam P4) + +This is the maam-plan **P4 design document** — the phase the plan scoped as +"design doc only" and deferred "until Phase 3 has proven the pipeline." +Phase 3 has: typed arithmetic (P3), trust-free guard-region optimization +(P3.4), the differential harness that validates the oracle against concrete +execution (P3.5), and function specialization with native unboxed +signatures (P3.6, types-bench1 ~46×, hypot2 demo ~90×). What is left on +the table after all of that is exactly one thing: **the object model**. +Every property access is still a hash lookup through an out-of-line +malloc'd map behind two indirect calls, every object literal is built by N +generic inserts, and the P3.6 benchmarks' residual wall time is boxed slot +traffic. Shapes are where that goes away, and — per gc-plan.md §"Object +header, forwarding, and shapes" — they are "the single highest-leverage +item" in the GC redesign too. This document is the joint design the two +plans each point at, written against the GC plan's Phase 1 header layout, +as instructed there ("The GC must not ship a header layout that shapes +then has to break"). + +Deliverables of this doc: the runtime shape model, the object layout +migration, the EIR ops and their verifier/trust rules, how the oracle's +`layouts()`/`constructors()` facts are consumed and *when they may be +trusted* (the promotion criteria, distilled from Phase 3 experience), a +phased implementation checklist with gates, and the validation story. + +## What we have today, as found + +Runtime object model (all file:line refs current at this writing): + +- `EJSObject` = `{ GCObjectHeader gc_header; EJSSpecOps* ops; ejsval + proto; EJSPropertyMap* map; }` (`runtime/ejs-object.h:229-234`). The + header is a bare `uint32_t` (`ejs-types.h:30`) whose low bits are the + `EJSScanType` and whose high byte holds user flags (extensibility) + (`ejs-gc.h:14-23`, `ejs-object.h:220-227`). On 64-bit targets 4 bytes + of padding follow it. **No inline property slots exist.** +- The property map is a per-object, malloc'd (non-GC-heap), separately + chained hash table (`ejs-object.h:116-136`) whose entries point at + individually malloc'd `EJSPropertyDesc` descriptors — flags + value or + getter/setter (`ejs-object.h:13-40`). Insertion order is a second + linked list threaded through the entries (enumeration depends on it). + It rehashes through a prime ladder and aborts past 4099 buckets + (`ejs-object.c:388-391`). +- A property get is: `_ejs_object_getprop` → `ToObject`/checks → indirect + `OP(obj,Get)` → `ToPropertyKey` (may `ToString`) → indirect + `GetOwnProperty` → hash, modulo, bucket-chain walk with + `_ejs_op_strict_eq` per candidate — repeated per prototype level + (`ejs-object.c:830-863`, `2039-2094`). A property add is a descriptor + malloc + map insert (`ejs-object.c:533-572`, `2098-2168`). +- Allocation is `ops->Allocate()` = `_ejs_gc_alloc(sizeof(EJSObject))` + followed by `_ejs_init_object`, which **calloc's the map** — every + object is two allocations, one outside the GC heap + (`ejs-object.c:752-772`, `2400-2403`). +- There are **no hidden classes, no shapes, no inline caches** anywhere + in the runtime (grep-confirmed). Class identity is the `ops` pointer. +- Compiled code's view of `EJSObject` lives in `lib/types.ts:88-103` and + must move in lockstep with any runtime layout change (the gc-plan's + atomic-land rule). + +Compiler/oracle side: + +- maam computes **type-aware hidden classes**: a `Shape` is an interned + *set* of `(name, TypeSig)` fields — order-insensitive by design (an AOT + compiler picks its own layout; order-sensitivity cost splay 109,603 + shapes vs 258), hash-consed with stable ids, with a megamorphic `⊤` + under a per-address cap (`echojs-maam/src/lang/shapes.ts`). +- `layouts()` reports, per allocation site, the **terminal** shapes its + objects settle into (construction intermediates are subsumed away) plus + a C-style struct layout per shape under a pluggable size model; + `monomorphic` = exactly one terminal shape. `constructors()` gives the + same per `new F()` callee. `accessorSites()` marks getter/setter + dispatch sites and their target sets (`echojs-maam/src/layout.ts`, + `src/analysis.ts:38-97`). All of these are **`Loc`-keyed**; the + node-identity discipline the compiler consumes (`typeOfNode`, + P1's oracle contract) does not cover them yet. +- EIR lowers property access to `get_prop_atom`/`set_prop_atom` + (GENERIC_OP runtime calls), and `make_object` to `_ejs_object_create` + plus one full generic `_ejs_object_setprop` per key + (`lib/eir/emit.ts` "make_object"). + +## The design in one paragraph + +The runtime grows a global, interned, **type-aware shape tree** that +mirrors maam's abstraction one-for-one; every ordinary object carries a +shape index in its (gc-P1-widened) header and stores its plain data +properties in a **slot array at shape-determined offsets**, falling back +to today's map ("dictionary mode") the moment anything exotic happens — +deletes, non-default attributes, symbol keys, cap overflow. The compiler, +exactly as in Phase 3, consumes oracle shape facts **guarded**: a property +access on an oracle-monomorphic receiver lowers to a `has_shape` diamond +whose fast arm is a fixed-offset slot load/store (typed, when the shape's +field representation says so) and whose slow arm is today's generic call — +correct regardless of oracle accuracy, because the guard decides at +runtime. Allocation sites with known terminal shapes are **born with +their shape** (one sized allocation, direct slot stores, no map, no +descriptor mallocs) under the same structural fences P3.6 built for +specialization. The GC's Phase 5 then consumes the same shapes for +per-shape trace bitmaps and memcpy evacuation; nothing in this document +waits for the mover, and nothing here may break its header. + +## Runtime design + +### Shapes are type-aware, and mirror maam exactly + +A runtime shape is `(parent, name, repr)` — a transition edge appended to +a parent shape, where `repr` is the field's representation: one of +`{unboxed-f64, boxed}` initially (finer tags later if profitable). maam +made representation part of class identity because an AOT compiler gets no +deprecate/migrate second chance; the runtime must agree, or a compiled +guard could pass while the field representation lies. A type-changing +store (`o.x = "s"` where x was num) is therefore a **transition** like a +property add: the object moves to the sibling shape with `x: boxed`, and +compiled fast paths guarding the old shape correctly fail to the generic +path. This is the load-bearing choice of the whole design: **a passed +shape guard proves both structure (offset) and representation (how to +load)**, so in typed regions a field the oracle typed `num` is one +compare + one 8-byte load away from a raw `double` — no `has_tag`, no +unbox — and the P3.4/P3.6 raw-value machinery applies unchanged +downstream. + +Two deliberate divergences from maam's shape table, both mechanical: + +- **Insertion order.** maam interns order-insensitively; ES enumeration + is insertion-ordered, and today's runtime honors that via the map's + insert list. Runtime shapes get order for free — the transition chain + *is* the insertion order — so enumeration walks the shape's field + chain. The correspondence rule for the compiler: a *runtime* shape is + an ordered witness of a maam shape (same field set, same reprs). The + compiler must therefore know the ORDER, not just the set, to intern the + guard's expected shape — see "deriving ordered shapes" below. +- **Interning is global and cross-module.** One process-wide shape + table, append-only, sharded by parent (transition lookup: + `parent × name × repr → child`, one hash hit per property add). Shape + ids are stable within a process, NOT across processes or modules at + compile time — compiled code never embeds a numeric id. Instead each + module interns the shapes it guards on at module init (exactly the + atom-table precedent: `getAtom`/`_ejs_module` machinery) and guards + compare against the module-global's loaded value. Cross-module + structural identity falls out of interning. + +### Object layout, in two steps + +**Step A (before gc-P5, works on today's non-moving collector):** + + EJSObject: + u32 gc_header (unchanged low bits: scan type, user flags) + u32 shape_index (the gc-P1 reserved bits; 0 = dictionary) + EJSSpecOps* ops + ejsval proto + union { EJSPropertyMap* map; // dictionary mode (shape 0) + ejsval* slots; // shaped mode: GC-heap slot array + } + + The shape index takes the 4 padding bytes the gc-plan's Phase 1 + earmarks (gc-plan.md:291-300) — this doc claims 24 bits of them for the + shape index plus a mode bit; forwarding/age/mark/card bits own the + rest, allocated jointly with gc-P1 in one atomic + `runtime/` + `lib/types.ts` change. If shapes land before gc-P1, the + same commit simply widens the header first and gc-P1 inherits it; the + two plans agreed this is one layout, written once. + Slot arrays are GC-heap allocations (`EJS_SCAN_TYPE` of their own, + scanned as ejsval ranges — precise tracing needs no per-shape bitmap + yet), sized to the shape's field count rounded to the allocator's size + class, grown by copy on transition past capacity. Objects lose the + calloc'd map entirely in shaped mode; dictionary mode keeps today's map + code verbatim. + +**Step B (gc-P5, the fused future):** slots move inline — +`shape id + contiguous inline slots`, fixed-size, memcpy-copyable, traced +by per-shape pointer bitmaps, born from the bump allocator. Nothing in +this document's compiler-visible contract changes at that point except +the addressing base (slot array pointer → object-interior offset); the +EIR ops below deliberately take a slot *index* immediate so the emitter +owns that switch. + +### Semantics: what is shaped, and what falls back + +Shaped mode covers **plain data properties with default attributes +(writable, enumerable, configurable) and string keys on ordinary +objects** (`ops == &_ejs_Object_specops`). Everything else is dictionary +mode, entered by a one-way `to_dictionary(obj)` migration (allocate map, +insert fields in shape order, shape_index := 0): + +- `delete` of a shaped field (`ejs-object.c:2199-2220` path); +- `Object.defineProperty` with any non-default attribute, or + data↔accessor conversion (`ejs-object.c:2224-2397`); +- accessor definition (`ejs-object.c:886-903`); +- symbol keys; numeric/index keys (arrays keep their own storage; + indexed access on plain objects is rare enough to eat the map); +- transition-cap overflow (a per-object add-count cap, the runtime twin + of maam's `shapeCap`) and any shape-table pathology; +- `preventExtensions`/`freeze`/`seal` keep shaped mode (they only toggle + the extensibility flag and attribute bits conceptually — but a + non-writable field breaks the "plain store" invariant, so freeze/seal + ALSO migrate; `preventExtensions` alone does not). + +`[[Set]]` on a shaped object: field present with same repr → slot store; +present with different repr → transition (sibling shape, same offsets, +new repr), then store; absent + extensible → transition (append), grow +slots if needed, store; anything else → migrate, then today's path. +`[[Get]]`/`GetOwnProperty` on shaped objects synthesize the default +descriptor from the slot; the specops keep their signatures — shapes are +an implementation detail *behind* `_ejs_Object_specops`, invisible to +every other class and to the spec algorithms above it. Proto mutation +(`__proto__` setters, `_ejs_object_literal_set_proto`) does not affect +the shape (shapes describe own-property structure only; proto stays a +per-object field), so no Crankshaft-style proto-in-shape complexity. + +The insertion-order list, `OwnPropertyKeys`, `Enumerate`, and the +for-in iterator read shaped objects by walking the shape chain +(`ejs-object.c:639-660`, `1103-1118` become mode-switched); the +scan/finalize specops likewise (`ejs-object.c:2406-2434`). + +### Born with their shape + +`make_object` at a site whose literal keys are static becomes: intern the +ordered shape at module init; allocate object + slot array in one runtime +call `_ejs_object_new_shaped(shape, proto)`; store each value at its +fixed offset (initializing stores — barrier-elidable when gc-P2 lands). +This is correct *unconditionally* for object literals — the literal's key +order and count are the site's static truth, no oracle involved; the +oracle only adds field *representations* (typed slots) and the terminal +shape when later code appends more fields. Constructor bodies are the +oracle-and-fence case: see promotion criteria. + +## EIR design + +### Ops + + // i1: does obj's shape index equal the module-interned shape? + // imms.shape names the module's shape-table entry (a link-time + // global, like atoms). Effect NONE — a pure header compare. + has_shape: { arity: 1, effects: NONE, imms: ["shape"], + sig: { params: ["ejsval"], result: "i1" } } + + // fixed-slot access. imms.slot is the field index within the + // guarded shape (the emitter turns it into slot-array/inline + // addressing); imms.repr ∈ {"boxed","f64"} selects the load/store + // type — "f64" produces/consumes raw f64 (the P2 typed-flow rules + // apply; only reachable behind a has_shape proving that repr). + slot_load: { arity: 1, effects: READ, imms: ["slot", "repr"] } + slot_store: { arity: 2, effects: WRITE, imms: ["slot", "repr"] } + + // allocation with a known shape: operands are the initial slot + // values in shape order (imms.shape, imms.reprs). GC|WRITE like + // make_object; replaces make_object at statically-shaped sites. + make_object_shaped: { arity: -1, effects: GC|WRITE, + imms: ["shape", "reprs"] } + +Verifier rules, in the P2/P3.4/P3.6 lineage: `slot_load`/`slot_store` +with `repr:"f64"` produce/take raw f64 and are subject to the existing +raw-values rules; a `slot_*` op must be dominated by a `has_shape` on the +same value for the same shape **when carrying `repr:"f64"`** (the boxed +case is memory-safe under any shape of at least `slot+1` fields, but the +verifier still requires the guard — structural discipline over cleverness, +same as rawJoin's re-checked marker). `has_shape` on a non-object value +is simply false at runtime (the emitter folds the NaN-box object check +into the shape-index load exactly as `isNumber` backs `has_tag`). + +### Lowering: the shape diamond + +`o.x` where the oracle types `o`'s site monomorphic with terminal shape S +(and `x` present in S): + + %t = has_shape %o, shape="S" + cond_br %t -> ^fast, ^slow + ^fast: %v = slot_load %o, slot=k, repr=… (raw f64 when S says num) + ^slow: %g = get_prop_atom %o, atom="x" (today's generic call) + join boxed — or raw, via the existing rawJoin machinery + +— the same diamond skeleton as `numericDiamond`, the same join +conventions, the same "guarded consumption is correct even when the +oracle is wrong" contract. Stores dual. `optimize-guards.ts` extends +its dominator facts: a dominating passed `has_shape %o, S` proves (a) +later `has_shape %o, S` guards fold, (b) `%o`'s field reprs — so a +`slot_load repr:"f64"` needs no `has_tag`, and consecutive accesses to +the same receiver merge into ONE guard region with one slow path, +exactly the hypot2 shape. SSA immutability makes receiver-value facts +sound the way number-ness was; **stores are the new wrinkle**: a +`slot_store`/`set_prop_atom`/call/construct between accesses can +transition the receiver's shape, so shape facts are killed by +WRITE|CALL-effect instructions on any path — the fact table gains an +effect-kill rule the number facts never needed. (A same-region +`slot_store` that does not add a field and matches repr provably does +NOT transition — the one exception the fact engine may keep.) + +`new F()` with a monomorphic `constructors()` report lowers `construct` +unchanged (the runtime allocates via F) in the guarded phase; +born-with-shape construction is a promotion (below), not a lowering +default. + +### Oracle interface additions (maam side, small) + +The compiler consumes shape facts through the node-identity discipline +every prior phase used; `Loc`-keyed tables don't survive the desugar +pipeline's node surgery. maam grows (mirroring `nodeTypes()`): + +- `layoutOfNode(objectLiteralNode)` → SiteLayout | undefined; +- `constructorReportOfNode(fnNode)` → ConstructorReport | undefined; +- `receiverShapesOfNode(memberExprObjectNode)` → Shape[] — the shapes + the *receiver value* of a property access may have (join over reached + configurations), which is what access-site guarding actually needs + (allocation-site layouts alone don't cover parameters/loads); +- ordered-shape witnesses: for literals the compiler orders fields + itself; for constructor reports maam must ALSO expose the terminal + shape's field order as first-write program order per analyzed path, or + decline (order ambiguity ⇒ no born-with-shape, guards still fine since + guards compare interned ordered shapes the RUNTIME built — see open + question 1). + +The compiler-side `TypeOracle` (lib/eir/oracle.ts) grows the same three +queries plus pass-through of `shapeCapHits`/megamorphic flags for the +promotion gates. `--types-dump` grows a per-site shape census +(diagnostics first — the plan's original P4 note — which doubles as the +instrumentation the P4.1 gate needs). + +## Promotion criteria — what Phase 3 taught us + +The trust ladder, restated as policy for shapes: + +1. **Guarded by default.** Shape diamonds are emitted wherever facts are + *exact* — monomorphic, non-megamorphic, `shapeCapHits==0` for the + site, every guarded field's repr a single tag. Wrong oracle = slow + path taken = speed lost, never correctness — the P3 contract. +2. **Exact facts only, no near-misses.** Two terminal shapes ⇒ no + diamond (a 2-way guard is a P4.6 *measured* extension, not a default); + union-repr fields load boxed; anything the oracle degraded + (`degradedBindings`, unknown calls touching the receiver) declines. + This is `operandIsNumber`'s "exactly {number}" rule transplanted. +3. **Unguarded consumption only behind structural fences.** + Born-with-terminal-shape construction asserts facts (in-ness of + not-yet-assigned fields is observable: `"b" in this` mid-construction + must be false, but a terminal-shape-born object would say true). So + it requires the P3.6 fence pattern, compiler-side and oracle-free: + the constructor's `this` never escapes before the last field store + (no calls, no stores of `this`, no `in`/`delete`/enumeration — a + straight-line store prefix), checked structurally on the lowered EIR + like the escape analysis checked closures. Object literals need no + fence (their construction is atomic in the source). P3.6 clones may + additionally drop shape guards on receivers their own escape analysis + proves site-local — later, measured, never first. +4. **Trust-free optimizer, provenance-not-trust markers.** Guard-region + merging and fact folding must re-verify structure (the P3.4 verifier + discipline: a marker can tighten checking, never admit); the + effect-kill rule for shape facts is part of the verifier's soundness + inventory from day one — it is THE new hazard class this phase adds, + and the adversarial-review focus (P3.4's review found 4 miscompiles + in exactly this kind of machinery; assume this phase's review will + too). +5. **Visible degradation.** Every declined promotion has a counted + reason (`shapes: declined polymorphic=N megamorphic=M capped=K + escaped=E`), printed on the stats line; the diff-lane scrapes stay + additive-only. +6. **Bisect hooks per mechanism.** `EJS_NO_SHAPE_GUARDS`, + `EJS_NO_BORN_SHAPED`, runtime `EJS_SHAPES=off` (dictionary-only mode) + — the EJS_NO_EIR_OPT/EJS_NO_EIR_SPEC mold. + +## Validation + +- **The differential harness is the precondition again.** Before any + unguarded consumption (born-with-shape), the P3.5 harness grows a + shapes lane: per allocation site, the concrete machine's object + field-sets must be contained in the abstract terminal+intermediate + shape sets (`abstract ⊒ concrete`, the containment-lane pattern), and + `ejs` runs must agree with node on shape-sensitive observables + (`Object.keys` order, `in` during construction, delete-then-readd, + freeze/seal, accessor conversion). Guarded-phase work (P4.3) does not + wait for this; born-with-shape (P4.4) hard-requires it — the P3.5/P3.6 + sequencing, replayed. +- **Runtime differential mode.** P4.1/P4.2 land behind `EJS_SHAPES=off`; + the whole test suite runs both modes and byte-compares (the old- + collector A/B discipline from gc-plan). A transition-storm stress test + (add/delete/type-flip churn) and the collect-every-N stress compose. +- **The --types diff lane** stays the behavioral gate for every compiler + phase, unchanged: flag-off untouched, `--types` byte-identical stdout. +- **Wrong-oracle probes.** A probe whose runtime shape diverges from the + oracle's claim (cross-module mutation of a "monomorphic" site's object, + the types-wrongoracle1 pattern) must route through the guard's slow + path with identical output; a looks-fenced-but-isn't constructor (mid- + construction escape via a call) must be *rejected by the structural + check*, pinned at unit level with a lying stub oracle — the P3.6 + wrong-oracle discipline, transplanted. +- **EIR-shape unit tests** for every op/verifier rule (guard-dominance + for f64 slots, effect-kill of shape facts, merge refusals), and probes + in test/types/ with census entries. + +## Benchmarks + +- **types-bench2** (new): constructor + field-access kernel — allocate N + points in a loop, sum `p.x*p.x + p.y*p.y` — the object-model twin of + types-bench1; measured at every phase gate (guarded, born-shaped, + typed-slots deltas recorded like 10.3×→14.0×→46× was). +- **splay** (the shape-stress classic; maam's own shape work was tuned on + it) as the polymorphism/transition stress once P4.2 lands. +- The gc-plan Phase 0 allocation profile doubles as the object-size/ + field-count census that sizes slot-array classes. + +## Phased plan + +Same bias as eir/maam/gc: small phases, matrix green after each, each +revertable, runtime phases A/B-able against the old path. + +- [ ] **P4.1 — Runtime shape tracking, behind the scenes.** Shape table + + transition cache; ordinary objects get shape indices maintained + on insert/delete/type-flip; the MAP REMAINS the store (dual + bookkeeping, zero behavior change); `EJS_SHAPES=off` kills it. + Header bits land here in the gc-P1 joint layout (atomic + runtime+`lib/types.ts` change, old collector active). + Instrumentation: shape census at exit (monomorphic-at-death %, + transition counts, dictionary-migration reasons), the shapes + analog of gc-P0's numbers. + *Gate:* matrix green ×3 targets; suite green under EJS_SHAPES=off + diff; property-insert micro-overhead measured and < 5%; census + numbers recorded (they size everything after). +- [ ] **P4.2 — Slot storage for shaped objects.** The union flip: slot + arrays in the GC heap replace the map for shaped-mode objects; + dictionary migration; specops mode-switch (get/set/define/delete/ + enumerate/scan/finalize); map code untouched for dictionary mode. + *Gate:* full suite + kangax under both modes byte-identical; + transition-storm + collect-every-N stress green; property get/set + microbench vs map recorded (this is the first raw win: no hash, no + strict-eq chain, no descriptor chasing); object allocation is ONE + GC allocation + one slot array (map calloc gone on the shaped + path). +- [ ] **P4.3 — Guarded fast paths under --types.** The compiler phase: + `has_shape`/`slot_load`/`slot_store` ops, verifier rules incl. the + effect-kill inventory, emitter (header-index compare; slot-array + addressing behind one seam), maam node-identity queries + + `receiverShapesOfNode`, lowering diamonds at + `get_prop_atom`/`set_prop_atom` for exact receivers, + optimize-guards shape facts + region merging, `--types-dump` shape + census. Boxed slots only in round one; `repr:"f64"` slots ride + the SAME phase only if the P3.4 machinery truly needs no changes, + else round two. + *Gate:* matrix green flag-off (lowering untouched without oracle); + --types diff lane 0-divergent; wrong-oracle probe routes slow with + identical output; EIR-shape unit tests; types-bench2 guarded delta + recorded; stats-line shape telemetry additive. +- [ ] **P4.4 — Born with their shape.** `make_object_shaped` for static + literals (unconditional) and for fenced monomorphic constructors + (structural no-escape-before-last-store check, lying-oracle unit + pins); `_ejs_object_new_shaped`; initializing slot stores. + HARD PRECONDITION: the differential harness shapes lane is green + (the P3.5→P3.6 sequencing, replayed). + *Gate:* harness shapes lane green incl. `in`-during-construction + probes; diff lane 0-divergent; types-bench2 allocation delta + recorded; declined-fence telemetry visible. +- [ ] **P4.5 — Typed slots × specialization × GC.** `repr:"f64"` slots + unboxed end-to-end inside guard regions and P3.6 clones (shape + facts feeding the raw-value machinery); clone-internal unguarded + slot access behind the P3.6 escape fences; gc-P5 consumption when + the mover lands (trace bitmaps, inline slots, memcpy evacuation, + barrier/trace elision for f64 slots) — sequenced by gc-plan, the + compiler contract here is already shaped for it (slot-index + immediates, one addressing seam). + *Gate:* types-bench2 typed delta; harness + lane green; gc stress + modes when applicable. +- [ ] **P4.6 — Measured extensions.** 2-way polymorphic guards; + accessor inlining from monomorphic `accessorSites()`; pretenuring + hooks (gc-plan's oracle pretenuring); array element shapes. Each + only on benchmark evidence, each behind its own flag. + +P4.1/P4.2 are pure runtime and can proceed independently of maam; P4.3+ +are compiler phases in the P3 mold. gc-P1 and P4.1 share one atomic +layout change whichever lands first. + +## Risks, named + +- **Dual-bookkeeping overhead (P4.1)** on shape-oblivious programs: one + transition-cache hit per property add, on every program. Measured at + the P4.1 gate with a hard <5% bar; the mitigation is that the + transition cache is one hash hit against an interned table vs the + map's existing hash+chain work, and P4.2 deletes the duplication. +- **Shape explosion from type-aware transitions.** maam's answer (caps + → megamorphic ⊤) transplants: per-object transition caps → dictionary, + global table growth monitored; splay is the canary. Order-sensitive + runtime shapes intern more than maam's order-insensitive ones — the + order-canonicalization trick is NOT available at runtime (enumeration + order is semantics); the census (P4.1 gate) tells us the real fanout + before any compiler work depends on it. +- **The effect-kill soundness class (P4.3).** Shape facts die at + WRITE|CALL effects; a missed kill is a silent miscompile of exactly the + kind P3.4's adversarial review kept finding. It gets the same + treatment: a written soundness inventory in optimize-guards, hand-built + attack IR in the unit tests, and the review loop before promotion. +- **Semantic fidelity of shaped mode.** Enumeration order, `in` during + construction, delete-readd patterns, freeze/seal, accessor conversion + — each has a dictionary-migration answer, and each needs a probe. The + runtime differential mode (EJS_SHAPES=off) is the backstop that turns + any miss into a visible diff instead of a shipped bug. +- **Cross-module shape identity** rests on module-init interning + (atom-table precedent). A module compiled against different oracle + facts than its neighbor still agrees on runtime shapes (they're + interned by structure, not by compile-time claim) — guards just fail + more often; correctness is untouched. The IR-in-manifest future + (cross-module oracle facts) only widens what qualifies. +- **Header layout coupling with gc-P1.** One layout, one atomic change, + both plans reviewed against it (gc-plan.md:317-320 owns the rule; this + doc's Step A is written to it). + +## Alternatives considered + +- **Structure-only shapes (V8-classic), representation checked per + access.** Cheaper transitions, but every typed load keeps a + `has_tag`+unbox and every guard proves less; maam already pays for + type-aware classes and P3 built the raw-f64 world this feeds. The + premium of type-aware transitions is measured at P4.1 (census) before + P4.3 commits — if type-flip churn is pathological in real code, reprs + can degrade to `boxed` per-field without changing the design. +- **Inline caches / PICs without static shapes.** A JIT's answer; AOT + echojs has no code patching and DOES have an oracle. Module-init- + interned guard globals ARE the static IC. Runtime-fed feedback could + come later via manifests; not this phase. +- **Per-class C structs from `layouts()` (full monomorphization, no + guards).** The seductive shortcut — and exactly the unguarded leap + the P3 ladder exists to prevent. Everything unguarded here rides + behind fences and the harness, or doesn't ship. +- **Deprecation/migration (V8's in-place repr rewrites).** Requires + patching compiled offsets; AOT has no second chance — this is why + reprs are in the class identity, per maam's own design note. + +## Open questions (tracked, not blocking P4.1/P4.2) + +1. **Ordered-shape witnesses from maam for constructors.** Literals + order themselves; constructor field order needs either a maam-side + first-write-order report or a compiler-side derivation from the + fenced straight-line store prefix (the fence already requires + straight-line stores, which *is* an order — likely sufficient, in + which case maam needs nothing). Decide during P4.3 design review. +2. **Slot-array growth policy** (size classes vs exact + + copy-on-transition) — informed by the P4.1 census. +3. **How much of `Array`/`Function`/module exotics join shaped mode + later** — out of scope for P4.x entirely; plain objects first. +4. **`repr` lattice granularity** (`f64`/`boxed` vs finer `bool`/`str` + tags) — start minimal; the census + types-bench2 decide. + +## Coordination + +- **gc-plan.md**: Phase 1 header bits (joint, atomic), Phase 2 inline + allocation (born-shaped literals become bump-alloc clients), Phase 5 + (consumes shapes for tracing/evacuation; this doc's Step B). +- **maam-plan.md**: P4 checklist ticks "design doc" with this document; + P4.1+ items live HERE (this doc is the phase's checklist owner, the + gc-plan pattern). The differential-harness shapes lane extends the + P3.5 asset in the maam repo. +- **plans.md escape analysis / allocation sinking**: sinking deletes + allocations shapes would otherwise accelerate — run the P4.1 census + with the optimizer ON (the gc-P0 lesson). + +## Phase checklist (for /goal sessions) + +- [ ] **P4.1** runtime shape table + tracking, dual bookkeeping, header + bits (joint with gc-P1), EJS_SHAPES=off, census instrumentation. + Gate: matrix ×3, off-mode diff, <5% insert overhead, census + recorded. +- [ ] **P4.2** slot storage + dictionary migration, specops mode-switch. + Gate: both-modes byte-identical suite+kangax, stress green, + microbench recorded. +- [ ] **P4.3** EIR ops + verifier inventory + emitter + maam + node-identity queries + guarded diamonds + shape facts in + optimize-guards. Gate: matrix, lane 0-divergent, wrong-oracle + probes, unit tests, types-bench2 delta. +- [ ] **P4.4** born-with-shape (literals unconditional; constructors + fenced). HARD PRECONDITION: harness shapes lane. Gate: harness + + lane + probes + delta. +- [ ] **P4.5** typed slots × clones × gc-P5 consumption. Gate: typed + delta, all lanes green. +- [ ] **P4.6** measured extensions (poly guards, accessor inlining, + pretenuring, arrays) — evidence-gated. From 94a662785c43be450119b784232d66daf0604967 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 23 Jul 2026 22:07:09 -0700 Subject: [PATCH 105/146] eir: P4.1 runtime shape tracking, dual bookkeeping + 64-bit header (joint gc-P1 layout) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Shapes-plan P4.1: the runtime grows a global interned type-aware shape tree (runtime/ejs-shapes.{h,c}) mirroring maam's abstraction — a shape is a (parent, name, repr) transition edge, repr in {f64, boxed} and part of class identity. Ordinary objects (_ejs_Object_specops) are born with the root shape and keep their index maintained on insert/delete/type-flip; the property map REMAINS the store — pure dual bookkeeping, zero behavior change. Deletes, non-default attributes, accessors, symbol/index keys, and cap overflow drop the object to dictionary mode (shape 0) one-way, with counted reasons. Header: GCObjectHeader widens u32 -> u64 as the ONE joint gc-P1/shapes layout (ejs-types.h documents the split: low 32 unchanged, bits 32-55 shape index, bit 56 P4.2 mode bit, 57-63 reserved for gc). EJSObject / EJSPrimString / EJSPrimSymbol sizes are unchanged (padding absorbed); EJSClosureEnv grows 8 bytes (runtime-internal only). lib/types.ts mirrors the layout in this same commit, header as two i32 halves so P4.3's has_shape can load the shape half directly; EJSModule field indices and export-slot offsets are unchanged. Perf: the per-parent transition memo is inlined into the insert hook (a memo-hit name was vetted when the memo's shape was interned, so the fast path is one ejsval compare); the hash cache keeps name hashes in its entries to reject probe collisions without content compares. Property-insert micro-overhead: 2.1% (mean of 5 interleaved runs, 300k objects x 8 fresh atom-keyed inserts, worst case) vs the <5% gate; with EJS_GC_DISABLE the on/off delta is zero. Knobs: EJS_SHAPES=off (kill switch), EJS_SHAPES_CENSUS=1 (exit census: shapes interned, transition/fast-hit counts, repr flips, migration reasons, per-shape death counts), EJS_SHAPE_CAP (field cap, default 64). Gates: matrix green (test-eir, lowtier, stages 0-3); the full stage1 suite is green under EJS_SHAPES=off via the new standing buck lane //:test-stage1-shapes-off (buck-test-stage.sh grew a TEST_ENV arg); census recorded in docs/shapes-plan.md (P4.1 ticked, numbers inline). Co-Authored-By: Claude Fable 5 --- BUCK | 11 ++ buck-test-stage.sh | 5 + docs/shapes-plan.md | 51 +++-- lib/types.ts | 26 ++- runtime/BUCK | 1 + runtime/ejs-init.c | 4 + runtime/ejs-object.c | 37 +++- runtime/ejs-shapes.c | 452 +++++++++++++++++++++++++++++++++++++++++++ runtime/ejs-shapes.h | 156 +++++++++++++++ runtime/ejs-types.h | 16 +- 10 files changed, 738 insertions(+), 21 deletions(-) create mode 100644 runtime/ejs-shapes.c create mode 100644 runtime/ejs-shapes.h diff --git a/BUCK b/BUCK index f0bc9277..0a62b5ac 100644 --- a/BUCK +++ b/BUCK @@ -129,3 +129,14 @@ genrule( ) for stage in ["1", "2", "3"] ] + +# the runtime shapes A/B lane (shapes-plan P4.1): the full stage1 suite +# with shape tracking disabled must be just as green as the default run +genrule( + name = "test-stage1-shapes-off", + srcs = ["buck-test-stage.sh"], + out = "test-stage1-shapes-off.log", + cmd = 'bash $SRCDIR/buck-test-stage.sh "$(location :srcdir-tree)" ' + + '"$(location //lib:generated)" "$(location :ejs.exe.stage1)" ' + + '1 "$(location //test:files)" ' + llvm_bindir() + ' "" "EJS_SHAPES=off"', +) diff --git a/buck-test-stage.sh b/buck-test-stage.sh index 316e0fad..84b13e25 100644 --- a/buck-test-stage.sh +++ b/buck-test-stage.sh @@ -12,6 +12,8 @@ STAGE_NUM="$4" # N TEST_FILES="$5" # //test:files LLVM_BIN="$6" # directory holding llc/opt EXTRA_FLAGS="${7:-}" # extra compiler flags, e.g. --ir +TEST_ENV="${8:-}" # extra env for the tester run, e.g. EJS_SHAPES=off + # (the runtime A/B lanes: shapes-plan P4.1) # node_modules (glob/colors/temp for the tester) come from the repo, same # as the babel step in //lib:generated. @@ -54,6 +56,9 @@ unset FORCE_COLOR if [ -n "$EXTRA_FLAGS" ]; then export EJS_EXTRA_FLAGS="$EXTRA_FLAGS" fi +if [ -n "$TEST_ENV" ]; then + export $TEST_ENV +fi if [ "$(uname -s)" = "Darwin" ]; then export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" fi diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index 2a872676..6a56701a 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -399,18 +399,39 @@ The trust ladder, restated as policy for shapes: Same bias as eir/maam/gc: small phases, matrix green after each, each revertable, runtime phases A/B-able against the old path. -- [ ] **P4.1 — Runtime shape tracking, behind the scenes.** Shape table - + transition cache; ordinary objects get shape indices maintained - on insert/delete/type-flip; the MAP REMAINS the store (dual - bookkeeping, zero behavior change); `EJS_SHAPES=off` kills it. - Header bits land here in the gc-P1 joint layout (atomic - runtime+`lib/types.ts` change, old collector active). - Instrumentation: shape census at exit (monomorphic-at-death %, - transition counts, dictionary-migration reasons), the shapes - analog of gc-P0's numbers. - *Gate:* matrix green ×3 targets; suite green under EJS_SHAPES=off - diff; property-insert micro-overhead measured and < 5%; census - numbers recorded (they size everything after). +- [x] **P4.1 — Runtime shape tracking, behind the scenes.** DONE + 2026-07-23. Shape table + transition cache + (`runtime/ejs-shapes.{h,c}`); ordinary objects get shape indices + maintained on insert/delete/type-flip; the MAP REMAINS the store + (dual bookkeeping, zero behavior change); `EJS_SHAPES=off` kills + it, `EJS_SHAPES_CENSUS=1` dumps the census at exit, + `EJS_SHAPE_CAP` overrides the per-object field cap (default 64). + Header bits landed as the gc-P1 joint layout: `GCObjectHeader` is + now `uint64_t` (ejs-types.h documents the split — low 32 unchanged, + bits 32-55 shape index, bit 56 P4.2 mode bit, 57-63 reserved gc); + `EJSObject`/`EJSPrimString`/`EJSPrimSymbol` sizes unchanged + (padding absorbed), `EJSClosureEnv` +8; `lib/types.ts` mirrored in + the same commit (header as two i32 fields so P4.3's `has_shape` + can load the shape half directly). + *Gate results:* matrix green (test-eir, lowtier, stages 0-3); + stage1 suite green with shapes on AND under EJS_SHAPES=off — the + off-mode run is a standing buck lane, `//:test-stage1-shapes-off` + (buck-test-stage.sh grew a TEST_ENV arg; the P4.2 both-modes + byte-identical gate extends this lane); + property-insert micro-overhead **2.1%** (mean of 5 interleaved + runs, 300k objects × 8 fresh atom-keyed inserts — the worst case; + needed the header-inlined transition-memo fast path, which serves + 99.99% of bench transitions: a memo-hit name was vetted when the + memo's shape was interned, so the whole check collapses to one + ejsval compare). Census (3-site probe: literal loop, delete, + accessor, repr-flip): 1052 objects born tracked, 160 shapes + interned, max depth 56 (a runtime-init builtin), transitions 3206 + of which 95% memo hits, 1 repr flip, 42 migrations (attrs 28 / + accessor 11 / symbol-key 2 / delete 1 — runtime-init builtins + dominate; user objects stay shaped). Death census needs a + collection to fire (finalize-driven), so short probes report 0 + deaths — the shapes analog of gc-P0's numbers lands with real + workloads in the P4.2 gate. - [ ] **P4.2 — Slot storage for shaped objects.** The union flip: slot arrays in the GC heap replace the map for shaped-mode objects; dictionary migration; specops mode-switch (get/set/define/delete/ @@ -548,10 +569,12 @@ layout change whichever lands first. ## Phase checklist (for /goal sessions) -- [ ] **P4.1** runtime shape table + tracking, dual bookkeeping, header +- [x] **P4.1** runtime shape table + tracking, dual bookkeeping, header bits (joint with gc-P1), EJS_SHAPES=off, census instrumentation. Gate: matrix ×3, off-mode diff, <5% insert overhead, census - recorded. + recorded. DONE 2026-07-23 — see the phased-plan entry above for + the numbers (2.1% insert overhead via the inlined transition + memo). - [ ] **P4.2** slot storage + dictionary migration, specops mode-switch. Gate: both-modes byte-identical suite+kangax, stress green, microbench recorded. diff --git a/lib/types.ts b/lib/types.ts index 798771a4..cd13a4fb 100644 --- a/lib/types.ts +++ b/lib/types.ts @@ -19,8 +19,10 @@ export const EjsValueLayout = llvm.StructType.create("EjsValueType", [Int64]); export const EjsValue: llvm.Type = EjsValueLayout; export const EjsClosureEnv = llvm.StructType.create("struct.EJSClosureEnv", [ - Int32, - Int32, + Int32, // GCObjectHeader gc_header (low half) + Int32, // GCObjectHeader shape/gc bits (high half) + Int32, // uint32_t length + Int32, // padding (slots are 8-aligned) llvm.ArrayType.get(EjsValueLayout, 1), ]); export const EjsPropIterator = EjsValue; @@ -47,7 +49,16 @@ export const getEjsClosureFunc = (abi: FunctionTypeMaker): llvm.Type => ]) .pointerTo(); -export const EjsPrimString = llvm.StructType.create("EjsPrimString", [Int32, Int32, Int64, Int64]); // XXX not the real structure but it should be good +// {u64 gc_header, u32 length, i32 hash, 8-byte data union} — matches the +// runtime's 24-byte _EJSPrimString; only the size matters here (globals of +// this type are zero-initialized and filled by _ejs_string_init_literal) +export const EjsPrimString = llvm.StructType.create("EjsPrimString", [ + Int32, + Int32, + Int32, + Int32, + Int64, +]); export const EjsSpecops = llvm.StructType.create("struct.EJSSpecOps", []); // XXX @@ -85,9 +96,13 @@ export function initTypes(is32bit: boolean): void { // to delay initialization of EJSObject (and therefore its uses) // until after we've determined pointer size. + // the 64-bit GCObjectHeader is represented as two i32s (little-endian + // halves) so the P4.3 shape-guard emitter can load the shape/gc half + // (field 1) without masking a 64-bit load; byte layout is identical if (is32bit) { EjsObject = llvm.StructType.create("struct.EJSObject", [ - Int32, // GCObjectHeader gc_header; + Int32, // GCObjectHeader gc_header (low half: scan type, user flags) + Int32, // GCObjectHeader shape index / gc bits (high half) EjsSpecops.pointerTo(), // EJSSpecOps* ops; EjsValue, // ejsval proto; // the __proto__ property EjsPropertyMap.pointerTo(), // EJSPropertyMap map; @@ -95,7 +110,8 @@ export function initTypes(is32bit: boolean): void { ]); } else { EjsObject = llvm.StructType.create("struct.EJSObject", [ - Int32, // GCObjectHeader gc_header; + Int32, // GCObjectHeader gc_header (low half: scan type, user flags) + Int32, // GCObjectHeader shape index / gc bits (high half) EjsSpecops.pointerTo(), // EJSSpecOps* ops; EjsValue, // ejsval proto; // the __proto__ property EjsPropertyMap.pointerTo(), // EJSPropertyMap map; diff --git a/runtime/BUCK b/runtime/BUCK index 158fa98c..8e86c233 100644 --- a/runtime/BUCK +++ b/runtime/BUCK @@ -75,6 +75,7 @@ shared_sources = [ "ejs-regexp.c", "ejs-require.c", "ejs-set.c", + "ejs-shapes.c", "ejs-stream.c", "ejs-string.c", "ejs-symbol.c", diff --git a/runtime/ejs-init.c b/runtime/ejs-init.c index 02000d3d..c2e8c4e9 100644 --- a/runtime/ejs-init.c +++ b/runtime/ejs-init.c @@ -44,6 +44,7 @@ #endif #include "ejs-proxy.h" #include "ejs-reflect.h" +#include "ejs-shapes.h" // lives in ejs-atoms-gen.c extern void _ejs_init_static_strings(); @@ -330,6 +331,9 @@ _ejs_root_builtin_globals(void) void _ejs_init(int argc, char** argv) { + // shape tracking must be configured before the first object is created + _ejs_shapes_init(); + // process class inheritance _ejs_init_classes(); diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 5f20f26a..4a635f9a 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -29,6 +29,7 @@ #include "ejs-symbol.h" #include "ejs-error.h" #include "ejs-xhr.h" +#include "ejs-shapes.h" // ES6 7.3.1 // Get (O, P) @@ -758,6 +759,10 @@ _ejs_init_object (EJSObject* obj, ejsval proto, EJSSpecOps *ops) _ejs_propertymap_init (obj->map); //printf ("obj->map = %p\n", obj->map); EJS_OBJECT_SET_EXTENSIBLE(obj); + // shapes P4.1: ordinary objects are born with the root shape and get + // dual-bookkept shape indices; everything else stays shape 0 + if (obj->ops == &_ejs_Object_specops) + _ejs_shape_object_born (obj); #if notyet ((GCObjectPtr)obj)->gc_data = 0x01; // HAS_FINALIZE #endif @@ -2208,6 +2213,8 @@ _ejs_object_specop_delete (ejsval O, ejsval P, EJSBool Throw) if (_ejs_property_desc_is_configurable(desc)) { /* a. Remove the own property with name P from O. */ _ejs_propertymap_remove (obj->map, P); + // shapes P4.1: delete of a tracked field drops to dictionary + _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_DELETE); /* b. Return true. */ return EJS_TRUE; } @@ -2277,6 +2284,19 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des } _ejs_propertymap_insert (obj->map, P, dest); + // shapes P4.1: a plain writable/enumerable/configurable data + // property extends the shape; anything else drops to dictionary + if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { + if (_ejs_property_desc_has_getter(dest) || _ejs_property_desc_has_setter(dest)) + _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ACCESSOR); + else if (!_ejs_property_desc_is_writable(dest) || + !_ejs_property_desc_is_enumerable(dest) || + !_ejs_property_desc_is_configurable(dest)) + _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ATTRS); + else + _ejs_shape_object_add_fast (obj, P, _ejs_property_desc_get_value(dest)); + } + /* c. Return true. */ return EJS_TRUE; } @@ -2392,6 +2412,20 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des if (_ejs_property_desc_has_writable (Desc)) _ejs_property_desc_set_writable (dest, _ejs_property_desc_is_writable (Desc)); + // shapes P4.1: accessor conversion and non-default attributes drop to + // dictionary (freeze/seal land here via SetIntegrityLevel); a plain + // value update gets the repr-flip check + if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { + if (_ejs_property_desc_has_getter(Desc) || _ejs_property_desc_has_setter(Desc)) + _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ACCESSOR); + else if ((_ejs_property_desc_has_writable(Desc) && !_ejs_property_desc_is_writable(Desc)) || + (_ejs_property_desc_has_enumerable(Desc) && !_ejs_property_desc_is_enumerable(Desc)) || + (_ejs_property_desc_has_configurable(Desc) && !_ejs_property_desc_is_configurable(Desc))) + _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ATTRS); + else if (_ejs_property_desc_has_value(Desc)) + _ejs_shape_object_set (obj, P, _ejs_property_desc_get_value(Desc)); + } + /* 13. Return true. */ return EJS_TRUE; } @@ -2402,9 +2436,10 @@ _ejs_object_specop_allocate () return _ejs_gc_new(EJSObject); } -void +void _ejs_object_specop_finalize(EJSObject* obj) { + _ejs_shape_object_died (obj); //printf ("_ejs_propertymap_free(obj->map = %p)\n", obj->map); _ejs_propertymap_free (obj->map); obj->map = NULL; diff --git a/runtime/ejs-shapes.c b/runtime/ejs-shapes.c new file mode 100644 index 00000000..7da33d3e --- /dev/null +++ b/runtime/ejs-shapes.c @@ -0,0 +1,452 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + * + * Runtime shape tracking (shapes-plan P4.1). Pure bookkeeping in this + * phase: the property map remains the store; ordinary objects carry a + * shape index maintained by the hooks below, and the census (dumped at + * exit under EJS_SHAPES_CENSUS) records what real programs do with it. + */ + +#include +#include + +#include "ejs.h" +#include "ejs-shapes.h" +#include "ejs-gc.h" +#include "ejs-ops.h" +#include "ejs-string.h" +#include "ejs-log.h" + +/* chunked, append-only shape storage: chunk addresses never move, so + &shape->name can be handed to _ejs_gc_add_root (the EJSShape record and + the chunk table itself live in ejs-shapes.h for the hot-path inlines) */ +#define SHAPE_MAX_SHAPES (1 << 24) /* the header gives us 24 bits */ +#define SHAPE_NUM_CHUNKS (SHAPE_MAX_SHAPES >> EJS_SHAPE_CHUNK_SHIFT) + +EJSShape *_ejs_shape_chunks[SHAPE_NUM_CHUNKS]; +static uint32_t shape_count; /* next unallocated index; starts at 2 (0 = + dictionary, 1 = root) */ + +EJSBool _ejs_shapes_tracking = EJS_FALSE; +static EJSBool census_enabled = EJS_FALSE; +static uint32_t shape_field_cap = 64; /* runtime twin of maam's shapeCap; + EJS_SHAPE_CAP overrides */ + +/* transition cache: open-addressed (parent, name, repr) -> child. + child == 0 marks an empty slot (shape 0 is never a transition target) */ +typedef struct { + uint32_t parent; + uint32_t child; + uint32_t name_hash; /* rejects probe collisions without touching names */ +} TransitionEntry; + +static TransitionEntry *transitions; +static uint32_t transition_capacity; /* power of two */ +static uint32_t transition_count; + +/* census counters (the first three are bumped by the header inlines) */ +uint64_t _ejs_shape_stat_objects_born; +uint64_t _ejs_shape_stat_transitions; +uint64_t _ejs_shape_stat_cache_hits; +uint64_t _ejs_shape_stat_fast_hits; +static uint64_t stat_repr_flips; +static uint64_t stat_deaths_shaped; +static uint64_t stat_migrations[EJS_SHAPE_MIGRATE_NUM_REASONS]; +static uint32_t stat_max_depth; + +#define shape_get _ejs_shape_get + +/* returns the new shape's index, or EJS_SHAPE_DICT if the table is full */ +static uint32_t +shape_alloc(uint32_t parent, ejsval name, uint8_t repr, uint32_t field_count) +{ + if (shape_count >= SHAPE_MAX_SHAPES) + return EJS_SHAPE_DICT; + + uint32_t index = shape_count++; + uint32_t chunk = index >> EJS_SHAPE_CHUNK_SHIFT; + if (_ejs_shape_chunks[chunk] == NULL) + _ejs_shape_chunks[chunk] = (EJSShape *)calloc(EJS_SHAPE_CHUNK_SIZE, sizeof(EJSShape)); + + EJSShape *shape = shape_get(index); + shape->parent = parent; + shape->field_count = field_count; + shape->name = name; + shape->repr = repr; + + /* keep the field name alive: shapes are process-global and never freed */ + if (EJSVAL_IS_STRING(name)) + _ejs_gc_add_root(&shape->name); + + return index; +} + +static uint32_t +transition_hash(uint32_t parent, uint32_t name_hash, uint8_t repr) +{ + uint32_t h = parent * 0x9e3779b9u; + h ^= name_hash + 0x9e3779b9u + (h << 6) + (h >> 2); + h ^= (uint32_t)repr + 0x9e3779b9u + (h << 6) + (h >> 2); + return h; +} + +static uint32_t +shape_name_hash(ejsval name) +{ + return _ejs_string_hash(name); +} + +/* property keys at a given site are almost always the same interned atom, + so raw ejsval equality catches nearly every cache hit; fall back to + content comparison for equal strings from different allocations */ +static EJSBool +shape_name_eq(ejsval a, ejsval b) +{ + if (EJSVAL_EQ(a, b)) + return EJS_TRUE; + return EJSVAL_TO_BOOLEAN(_ejs_op_strict_eq(a, b)); +} + +static void transition_insert(uint32_t parent, uint32_t name_hash, uint32_t child); + +static void +transition_grow(void) +{ + TransitionEntry *old = transitions; + uint32_t old_capacity = transition_capacity; + + transition_capacity = old_capacity ? old_capacity * 2 : 256; + transitions = (TransitionEntry *)calloc(transition_capacity, sizeof(TransitionEntry)); + transition_count = 0; + + for (uint32_t i = 0; i < old_capacity; i++) { + if (old[i].child == 0) + continue; + EJSShape *child_shape = shape_get(old[i].child); + transition_insert(old[i].parent, shape_name_hash(child_shape->name), + old[i].child); + } + free(old); +} + +static void +transition_insert(uint32_t parent, uint32_t name_hash, uint32_t child) +{ + if (transition_count + 1 > transition_capacity - (transition_capacity >> 2)) + transition_grow(); + + uint32_t mask = transition_capacity - 1; + uint32_t slot = transition_hash(parent, name_hash, shape_get(child)->repr) & mask; + while (transitions[slot].child != 0) + slot = (slot + 1) & mask; + transitions[slot].parent = parent; + transitions[slot].child = child; + transitions[slot].name_hash = name_hash; + transition_count++; +} + +/* the one hash hit per property add: find the (parent, name, repr) edge, + interning a new shape on first use. returns EJS_SHAPE_DICT only when + the global table is full. */ +static uint32_t +transition_find_or_add(uint32_t parent, ejsval name, uint8_t repr) +{ + EJSShape *parent_shape = shape_get(parent); + + /* the memo hit: same construction sequence as last time */ + uint32_t memo = parent_shape->last_child; + if (memo != EJS_SHAPE_DICT) { + EJSShape *m = shape_get(memo); + if (m->repr == repr && EJSVAL_EQ(m->name, name)) { + _ejs_shape_stat_cache_hits++; + return memo; + } + } + + if (transition_capacity == 0) + transition_grow(); + + uint32_t name_hash = shape_name_hash(name); + uint32_t mask = transition_capacity - 1; + uint32_t slot = transition_hash(parent, name_hash, repr) & mask; + + while (transitions[slot].child != 0) { + if (transitions[slot].parent == parent && + transitions[slot].name_hash == name_hash) { + EJSShape *cand = shape_get(transitions[slot].child); + if (cand->repr == repr && shape_name_eq(cand->name, name)) { + _ejs_shape_stat_cache_hits++; + parent_shape->last_child = transitions[slot].child; + return transitions[slot].child; + } + } + slot = (slot + 1) & mask; + } + + uint32_t child = shape_alloc(parent, name, repr, + parent_shape->field_count + 1); + if (child == EJS_SHAPE_DICT) + return EJS_SHAPE_DICT; + + transition_insert(parent, name_hash, child); + shape_get(parent)->last_child = child; /* shape_alloc may have grown chunks */ + return child; +} + +static uint8_t +classify_repr(ejsval value) +{ + return EJSVAL_IS_NUMBER(value) ? EJS_SHAPE_REPR_F64 : EJS_SHAPE_REPR_BOXED; +} + +void +_ejs_shape_object_migrate(EJSObject *obj, EJSShapeMigrateReason reason) +{ + if (EJS_OBJECT_SHAPE(obj) == EJS_SHAPE_DICT) + return; + EJS_OBJECT_SET_SHAPE(obj, EJS_SHAPE_DICT); + stat_migrations[reason]++; +} + +void +_ejs_shape_object_add(EJSObject *obj, ejsval name, ejsval value) +{ + uint32_t shape = EJS_OBJECT_SHAPE(obj); + if (shape == EJS_SHAPE_DICT) + return; + + if (!EJSVAL_IS_STRING(name)) { + _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_SYMBOL_KEY); + return; + } + + /* numeric/index-looking keys stay in the map (arrays own indexed + storage; indexed access on plain objects is rare enough to eat it) */ + EJSPrimString *namestr = EJSVAL_TO_STRING(name); + if (namestr->length > 0) { + jschar c0 = EJS_PRIMSTR_GET_TYPE(namestr) == EJS_STRING_FLAT + ? namestr->data.flat[0] + : _ejs_string_ucs2_at(namestr, 0); + if (c0 >= '0' && c0 <= '9') { + _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_INDEX_KEY); + return; + } + } + + EJSShape *cur = shape_get(shape); + if (cur->field_count >= shape_field_cap) { + _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_CAP); + return; + } + + uint32_t child = transition_find_or_add(shape, name, classify_repr(value)); + if (child == EJS_SHAPE_DICT) { + _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_TABLE_FULL); + return; + } + + EJS_OBJECT_SET_SHAPE(obj, child); + _ejs_shape_stat_transitions++; + uint32_t depth = shape_get(child)->field_count; + if (depth > stat_max_depth) + stat_max_depth = depth; +} + +/* rebuild the chain with `field_index`'s repr changed: the sibling shape a + type-flipping store transitions to. returns EJS_SHAPE_DICT on table + overflow. */ +static uint32_t +shape_flip_repr(uint32_t shape, uint32_t field_index, uint8_t new_repr) +{ + /* collect edges leaf->root; depth is capped by shape_field_cap */ + ejsval names[256]; + uint8_t reprs[256]; + uint32_t depth = shape_get(shape)->field_count; + EJS_ASSERT(depth <= 256); + + uint32_t s = shape; + for (uint32_t i = depth; i > 0; i--) { + EJSShape *cur = shape_get(s); + names[i - 1] = cur->name; + reprs[i - 1] = cur->repr; + s = cur->parent; + } + reprs[field_index] = new_repr; + + uint32_t rebuilt = EJS_SHAPE_ROOT; + for (uint32_t i = 0; i < depth; i++) { + rebuilt = transition_find_or_add(rebuilt, names[i], reprs[i]); + if (rebuilt == EJS_SHAPE_DICT) + return EJS_SHAPE_DICT; + } + return rebuilt; +} + +void +_ejs_shape_object_set(EJSObject *obj, ejsval name, ejsval value) +{ + uint32_t shape = EJS_OBJECT_SHAPE(obj); + if (shape == EJS_SHAPE_DICT) + return; + + if (!EJSVAL_IS_STRING(name)) + return; /* symbol props never enter a shape; nothing to flip */ + + /* find the field on the chain (leaf->root; index counts from the root) */ + uint32_t s = shape; + int32_t field_index = -1; + uint8_t old_repr = EJS_SHAPE_REPR_BOXED; + while (s != EJS_SHAPE_DICT) { + EJSShape *cur = shape_get(s); + if (cur->field_count == 0) + break; + if (shape_name_eq(cur->name, name)) { + field_index = (int32_t)cur->field_count - 1; + old_repr = cur->repr; + break; + } + s = cur->parent; + } + if (field_index < 0) + return; /* not a tracked field (e.g. index-looking key kept in the map) */ + + uint8_t new_repr = classify_repr(value); + if (new_repr == old_repr) + return; + + uint32_t flipped = shape_flip_repr(shape, (uint32_t)field_index, new_repr); + if (flipped == EJS_SHAPE_DICT) { + _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_TABLE_FULL); + return; + } + EJS_OBJECT_SET_SHAPE(obj, flipped); + stat_repr_flips++; +} + +void +_ejs_shape_object_died(EJSObject *obj) +{ + if (!census_enabled) + return; + uint32_t shape = EJS_OBJECT_SHAPE(obj); + if (shape == EJS_SHAPE_DICT) + return; + shape_get(shape)->deaths++; + stat_deaths_shaped++; +} + +/* ------------------------------------------------------------------ */ +/* census */ + +static void +census_print_shape_fields(uint32_t shape) +{ + ejsval names[256]; + uint8_t reprs[256]; + uint32_t depth = shape_get(shape)->field_count; + + uint32_t s = shape; + for (uint32_t i = depth; i > 0; i--) { + EJSShape *cur = shape_get(s); + names[i - 1] = cur->name; + reprs[i - 1] = cur->repr; + s = cur->parent; + } + + _ejs_logstr("{"); + for (uint32_t i = 0; i < depth; i++) { + if (i > 0) + _ejs_logstr(", "); + char *utf8 = ucs2_to_utf8(EJSVAL_TO_FLAT_STRING(names[i])); + _ejs_logstr(utf8); + free(utf8); + if (reprs[i] == EJS_SHAPE_REPR_F64) + _ejs_logstr(":f64"); + } + _ejs_logstr("}"); +} + +static void +census_dump(void) +{ + static const char *reason_names[EJS_SHAPE_MIGRATE_NUM_REASONS] = { + "delete", "attrs", "accessor", "symbol-key", + "index-key", "cap", "table-full", + }; + + uint64_t migrations_total = 0; + for (int i = 0; i < EJS_SHAPE_MIGRATE_NUM_REASONS; i++) + migrations_total += stat_migrations[i]; + + _ejs_log("=== ejs shape census ===\n"); + _ejs_log("objects born tracked: %llu\n", + (unsigned long long)_ejs_shape_stat_objects_born); + _ejs_log("shapes interned: %u (max depth %u)\n", + shape_count > 2 ? shape_count - 2 : 0, stat_max_depth); + _ejs_log("transitions: %llu (fast hits %llu, cache hits %llu)\n", + (unsigned long long)_ejs_shape_stat_transitions, + (unsigned long long)_ejs_shape_stat_fast_hits, + (unsigned long long)_ejs_shape_stat_cache_hits); + _ejs_log("repr flips: %llu\n", + (unsigned long long)stat_repr_flips); + _ejs_log("dictionary migrations: %llu\n", + (unsigned long long)migrations_total); + for (int i = 0; i < EJS_SHAPE_MIGRATE_NUM_REASONS; i++) + if (stat_migrations[i]) + _ejs_log(" %-11s %llu\n", reason_names[i], + (unsigned long long)stat_migrations[i]); + _ejs_log("deaths while shaped: %llu\n", + (unsigned long long)stat_deaths_shaped); + + /* top shapes by death count */ + uint32_t top[16]; + uint32_t ntop = 0; + for (uint32_t i = 2; i < shape_count; i++) { + if (shape_get(i)->deaths == 0) + continue; + uint32_t pos = ntop < 16 ? ntop : 15; + if (ntop == 16 && shape_get(i)->deaths <= shape_get(top[15])->deaths) + continue; + while (pos > 0 && shape_get(top[pos - 1])->deaths < shape_get(i)->deaths) { + top[pos] = top[pos - 1]; + pos--; + } + top[pos] = i; + if (ntop < 16) + ntop++; + } + if (ntop > 0) { + _ejs_log("top shapes at death:\n"); + for (uint32_t i = 0; i < ntop; i++) { + _ejs_log(" %8u ", shape_get(top[i])->deaths); + census_print_shape_fields(top[i]); + _ejs_logstr("\n"); + } + } +} + +void +_ejs_shapes_init(void) +{ + const char *shapes_env = getenv("EJS_SHAPES"); + _ejs_shapes_tracking = + !(shapes_env && (!strcmp(shapes_env, "off") || !strcmp(shapes_env, "0"))); + if (!_ejs_shapes_tracking) + return; + + const char *cap_env = getenv("EJS_SHAPE_CAP"); + if (cap_env) { + int cap = atoi(cap_env); + if (cap > 0 && cap <= 256) + shape_field_cap = (uint32_t)cap; + } + + /* index 0 is dictionary mode; index 1 is the empty root shape */ + shape_count = 1; + shape_alloc(EJS_SHAPE_DICT, _ejs_undefined, EJS_SHAPE_REPR_BOXED, 0); + + if (getenv("EJS_SHAPES_CENSUS")) { + census_enabled = EJS_TRUE; + atexit(census_dump); + } +} diff --git a/runtime/ejs-shapes.h b/runtime/ejs-shapes.h new file mode 100644 index 00000000..aa4a518c --- /dev/null +++ b/runtime/ejs-shapes.h @@ -0,0 +1,156 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + * + * Runtime shape tracking (shapes-plan P4.1). + * + * A shape is a transition edge (parent, name, repr) appended to a parent + * shape; the global table is interned and append-only, mirroring maam's + * type-aware hidden classes one-for-one (repr is part of shape identity). + * In P4.1 shapes are pure bookkeeping: the property map remains the + * store, ordinary objects just carry a shape index in the widened + * GCObjectHeader, maintained on insert/delete/type-flip. Anything the + * shaped world can't express (deletes, non-default attributes, accessors, + * symbol/index keys, cap overflow) drops the object to dictionary mode + * (shape index 0) one-way, with the reason counted for the census. + * + * EJS_SHAPES=off disables tracking entirely; EJS_SHAPES_CENSUS=1 dumps + * the shape census at exit. + */ + +#ifndef _ejs_shapes_h_ +#define _ejs_shapes_h_ + +#include "ejs.h" +#include "ejs-object.h" + +EJS_BEGIN_DECLS + +/* field representation, part of shape identity (mirrors maam's TypeSig + abstraction; finer tags later if the census says they pay) */ +typedef enum { + EJS_SHAPE_REPR_BOXED = 0, + EJS_SHAPE_REPR_F64 = 1, +} EJSShapeRepr; + +/* shape index 0 = dictionary mode (or a class that never tracks); + shape index 1 = the empty ordinary-object shape */ +#define EJS_SHAPE_DICT 0 +#define EJS_SHAPE_ROOT 1 + +/* the shape index lives in bits 32-55 of the 64-bit GCObjectHeader (bit + 56 is the P4.2 storage-mode bit; 57-63 belong to the GC) — see the + layout comment in ejs-types.h */ +#define EJS_GC_HEADER_SHAPE_SHIFT 32 +#define EJS_GC_HEADER_SHAPE_MASK 0xFFFFFFULL + +#define EJS_OBJECT_SHAPE(o) \ + ((uint32_t)((((EJSObject *)(o))->gc_header >> EJS_GC_HEADER_SHAPE_SHIFT) & \ + EJS_GC_HEADER_SHAPE_MASK)) +#define EJS_OBJECT_SET_SHAPE(o, s) \ + (((EJSObject *)(o))->gc_header = \ + (((EJSObject *)(o))->gc_header & \ + ~(EJS_GC_HEADER_SHAPE_MASK << EJS_GC_HEADER_SHAPE_SHIFT)) | \ + (((uint64_t)(s) & EJS_GC_HEADER_SHAPE_MASK) \ + << EJS_GC_HEADER_SHAPE_SHIFT)) + +/* dictionary-migration reasons, census-counted */ +typedef enum { + EJS_SHAPE_MIGRATE_DELETE = 0, /* delete of a tracked field */ + EJS_SHAPE_MIGRATE_ATTRS, /* non-default w/e/c attribute (incl. freeze/seal) */ + EJS_SHAPE_MIGRATE_ACCESSOR, /* getter/setter definition or conversion */ + EJS_SHAPE_MIGRATE_SYMBOL_KEY, /* symbol-keyed property */ + EJS_SHAPE_MIGRATE_INDEX_KEY, /* numeric/index-looking key */ + EJS_SHAPE_MIGRATE_CAP, /* per-object field-count cap overflow */ + EJS_SHAPE_MIGRATE_TABLE_FULL, /* global shape-table pathology */ + EJS_SHAPE_MIGRATE_NUM_REASONS +} EJSShapeMigrateReason; + +void _ejs_shapes_init(void); + +/* the shape record and chunk table are exposed only so the hot-path + inlines below can avoid a cross-TU call per property insert; everything + else treats them as private to ejs-shapes.c */ +typedef struct { + uint32_t parent; /* parent shape index (EJS_SHAPE_DICT for the root) */ + uint32_t field_count; /* own fields including this edge (root = 0) */ + ejsval name; /* this edge's field name; gc-rooted (chunks are + address-stable) */ + uint8_t repr; /* EJSShapeRepr, part of shape identity */ + uint32_t last_child; /* memo of the most recent transition taken from + this shape; monomorphic construction sites hit + it every time and skip the hash entirely */ + uint32_t deaths; /* census: objects finalized bearing this shape */ +} EJSShape; + +#define EJS_SHAPE_CHUNK_SHIFT 12 +#define EJS_SHAPE_CHUNK_SIZE (1 << EJS_SHAPE_CHUNK_SHIFT) + +extern EJSShape *_ejs_shape_chunks[]; +extern EJSBool _ejs_shapes_tracking; +extern uint64_t _ejs_shape_stat_objects_born; +extern uint64_t _ejs_shape_stat_transitions; +extern uint64_t _ejs_shape_stat_cache_hits; +extern uint64_t _ejs_shape_stat_fast_hits; + +static inline EJSShape * +_ejs_shape_get(uint32_t index) +{ + return &_ejs_shape_chunks[index >> EJS_SHAPE_CHUNK_SHIFT] + [index & (EJS_SHAPE_CHUNK_SIZE - 1)]; +} + +/* object-side hooks; every one is a cheap no-op when tracking is off or + the object is untracked (shape index 0) */ + +/* an ordinary object was just initialized: give it the root shape */ +static inline void +_ejs_shape_object_born(EJSObject *obj) +{ + if (!_ejs_shapes_tracking) + return; + EJS_OBJECT_SET_SHAPE(obj, EJS_SHAPE_ROOT); + _ejs_shape_stat_objects_born++; +} + +/* a new own data property with default attributes was inserted (the + out-of-line path: key vetting, cap check, transition-cache lookup) */ +void _ejs_shape_object_add(EJSObject *obj, ejsval name, ejsval value); + +/* inline fast path for property adds: when the parent shape's transition + memo matches (same name ejsval, same repr — the monomorphic + construction sequence), the name was already vetted as a shapeable key + when the memo's shape was interned and its field count already passed + the cap, so every check collapses into one compare */ +static inline void +_ejs_shape_object_add_fast(EJSObject *obj, ejsval name, ejsval value) +{ + uint32_t shape = EJS_OBJECT_SHAPE(obj); + if (shape == EJS_SHAPE_DICT) + return; + uint32_t memo = _ejs_shape_get(shape)->last_child; + if (memo != EJS_SHAPE_DICT) { + EJSShape *m = _ejs_shape_get(memo); + uint8_t repr = EJSVAL_IS_NUMBER(value) ? EJS_SHAPE_REPR_F64 + : EJS_SHAPE_REPR_BOXED; + if (EJSVAL_EQ(m->name, name) && m->repr == repr) { + EJS_OBJECT_SET_SHAPE(obj, memo); + _ejs_shape_stat_transitions++; + _ejs_shape_stat_fast_hits++; + return; + } + } + _ejs_shape_object_add(obj, name, value); +} + +/* the value of an existing own data property was updated (repr-flip check) */ +void _ejs_shape_object_set(EJSObject *obj, ejsval name, ejsval value); + +/* something un-shapeable happened: one-way drop to dictionary mode */ +void _ejs_shape_object_migrate(EJSObject *obj, EJSShapeMigrateReason reason); + +/* finalizer hook, census only */ +void _ejs_shape_object_died(EJSObject *obj); + +EJS_END_DECLS + +#endif /* _ejs_shapes_h_ */ diff --git a/runtime/ejs-types.h b/runtime/ejs-types.h index b1d9bec4..19bba827 100644 --- a/runtime/ejs-types.h +++ b/runtime/ejs-types.h @@ -27,7 +27,21 @@ typedef double jsdouble; typedef uint16_t jschar; -typedef uint32_t GCObjectHeader; +// The object header, widened to 64 bits as the joint gc-plan P1 / +// shapes-plan P4.1 layout (one layout, written once — see +// docs/gc-plan.md "Object header, forwarding, and shapes" and +// docs/shapes-plan.md "Object layout, in two steps"): +// +// bits 0-31 the pre-existing 32-bit header: EJSScanType in the low +// bits, user flags at EJS_GC_USER_FLAGS_SHIFT (unchanged) +// bits 32-55 shape index (0 = dictionary mode / untracked) +// bit 56 shaped-storage mode bit (reserved for shapes P4.2) +// bits 57-63 reserved for the GC (forwarding/age/mark/card, gc-P1) +// +// EJSObject absorbs the widening into what was padding (sizeof +// unchanged); EJSPrimString/EJSPrimSymbol keep their sizes; EJSClosureEnv +// grows by 8. lib/types.ts mirrors this in the same commit. +typedef uint64_t GCObjectHeader; #if defined(__GNUC__) && (__GNUC__ > 2) # define EJS_LIKELY(x) (__builtin_expect((x), 1)) From c0c35e2c62273adb7e5aa8c8e57249b7b428ba82 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 00:19:36 -0700 Subject: [PATCH 106/146] eir: spawn llvm tools from the built-against bindir; fail loudly on tool failure MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Two halves of the same hazard, found during P4.1: a compile driven from outside the buck harness picked up whatever `opt` PATH resolved — here llvm@16 — which read llvm-22 bitcode without complaint, exited 0, and turned the module-init stores into `unreachable` traps. And even a tool that DID fail wouldn't have stopped the build: every opt/llc/link exit code was ignored (the literal `/* XXX code*/` handlers), so the driver linked stale objects and reported success. Fix 1: host-config gains LLVM_BINDIR, baked from the buck llvm.prefix config (defs.bzl llvm_bindir()), and the driver spawns $LLVM_BINDIR/{opt,llc,llvm-as} instead of bare PATH names. The LLVM_BINDIR environment variable overrides the baked path; setting it to "" restores plain PATH lookup. Stage executables are now self-consistent with the toolchain they were built by. Fix 2: the self-hosted runtime's child_process.spawn now returns the child's exit status (127 = exec failure via _exit, 128+sig for signal deaths, -1 = fork/waitpid failure) instead of discarding it, and the driver checks every opt/llc/linker invocation in both the node-hosted and self-hosted branches — non-zero means a loud message and exit(-1), no artifact. Verified: with llvm@16 first on PATH a manual srcdir compile now produces a correct binary, and LLVM_BINDIR=/nonexistent fails with "opt failed (exit status 127)", driver exit 255, no exe. Matrix green: test-eir, lowtier, stages 0-3, test-stage1-shapes-off. Co-Authored-By: Claude Fable 5 --- ejs-es6.ts | 56 +++++++++++++++++++++++++++++------ lib/BUCK | 3 +- lib/host-config.d.ts | 1 + lib/host-config.js.in | 1 + node-compat/ejs-node-compat.c | 19 +++++++----- 5 files changed, 63 insertions(+), 17 deletions(-) diff --git a/ejs-es6.ts b/ejs-es6.ts index b8ae797a..6396b1c1 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -20,6 +20,7 @@ import { Triple } from "./lib/triple"; import { LLVM_SUFFIX as DEFAULT_LLVM_SUFFIX, + LLVM_BINDIR as DEFAULT_LLVM_BINDIR, RUNLOOP_IMPL as DEFAULT_RUNLOOP_IMPL, } from "./lib/host-config"; @@ -496,12 +497,33 @@ function target_path_prepend(triple: TripleT): string { } const llvm_suffix = process.env["LLVM_SUFFIX"] || DEFAULT_LLVM_SUFFIX; +// spawn the llvm tools from the bindir this compiler was BUILT against +// (baked into host-config from the buck llvm.prefix config) rather than +// whatever PATH resolves: a different-major `opt` reading our bitcode +// doesn't fail loudly — llvm@16 turned llvm-22 module-init stores into +// `unreachable` traps with exit code 0. LLVM_BINDIR in the environment +// overrides the baked path; setting it to "" restores plain PATH lookup. +const llvm_bindir = process.env["LLVM_BINDIR"] ?? DEFAULT_LLVM_BINDIR; +const llvm_tool = (tool: string): string => + llvm_bindir ? path.join(llvm_bindir, tool + llvm_suffix) : tool + llvm_suffix; const llvm_commands = { - opt: `opt${llvm_suffix}`, - llc: `llc${llvm_suffix}`, - "llvm-as": `llvm-as${llvm_suffix}`, + opt: llvm_tool("opt"), + llc: llvm_tool("llc"), + "llvm-as": llvm_tool("llvm-as"), } as const; +// the self-hosted runtime's spawn is synchronous and returns the child's +// exit status (a number); node's returns a ChildProcess. This helper is +// for the self-hosted branches: run the tool, fail the build loudly on a +// non-zero exit instead of continuing to link stale objects. +function spawnSyncChecked(command: string, cmd_args: string[]): void { + const rv = spawn(command, cmd_args) as unknown as number; + if (rv !== 0) { + console.warn(`${command} failed (exit status ${rv})`); + process.exit(-1); + } +} + function compileFile( filename: string, parse_tree: Program, @@ -586,8 +608,8 @@ function compileFile( if (!isNode()) { // in ejs spawn is synchronous. - spawn(llvm_commands["opt"], opt_args); - spawn(llvm_commands["llc"], llc_args); + spawnSyncChecked(llvm_commands["opt"], opt_args); + spawnSyncChecked(llvm_commands["llc"], llc_args); o_filenames.push(o_filename); compileCallback(); } else { @@ -598,7 +620,11 @@ function compileFile( console.warn(`error executing ${llvm_commands["opt"]}: ${err}`); process.exit(-1); }); - opt.on("exit", (/* XXX code*/) => { + opt.on("exit", (code) => { + if (code !== 0) { + console.warn(`${llvm_commands["opt"]} failed (exit status ${code})`); + process.exit(-1); + } debug.log(1, `executing '${llvm_commands["llc"]} ${llc_args.join(" ")}'`); let llc = spawn(llvm_commands["llc"], llc_args); llc.stderr.on("data", (data) => console.warn(`${data}`)); @@ -606,7 +632,11 @@ function compileFile( console.warn(`error executing ${llvm_commands["llc"]}: ${err}`); process.exit(-1); }); - llc.on("exit", (/* XXX code*/) => { + llc.on("exit", (code) => { + if (code !== 0) { + console.warn(`${llvm_commands["llc"]} failed (exit status ${code})`); + process.exit(-1); + } o_filenames.push(o_filename); compileCallback(); }); @@ -726,13 +756,21 @@ function do_final_link(main_file: string, modules: Map): voi debug.log(1, `executing '${target_linker} ${clang_args.join(" ")}'`); if (typeof __ejs != "undefined") { - spawn(target_linker, clang_args); + spawnSyncChecked(target_linker, clang_args); // we ignore leave_tmp_files here if (!options.quiet) console.warn(`${bold()}done.${reset()}`); } else { let clang = spawn(target_linker, clang_args); clang.stderr.on("data", (data) => console.warn(`${data}`)); - clang.on("exit", (/* XXX code*/) => { + clang.on("error", (err) => { + console.warn(`error executing ${target_linker}: ${err}`); + process.exit(-1); + }); + clang.on("exit", (code) => { + if (code !== 0) { + console.warn(`${target_linker} failed (exit status ${code})`); + process.exit(-1); + } if (!options.leave_temp_files) { cleanup(() => { if (!options.quiet) console.warn(`${bold()}done.${reset()}`); diff --git a/lib/BUCK b/lib/BUCK index dc3fd4db..5838144c 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -1,10 +1,11 @@ -load("//:defs.bzl", "EJS_RUNLOOP_IMPL", "llvm_suffix") +load("//:defs.bzl", "EJS_RUNLOOP_IMPL", "llvm_bindir", "llvm_suffix") genrule( name = "host-config.js", srcs = ["host-config.js.in"], out = "host-config.js", cmd = 'sed -e "s,@LLVM_SUFFIX@,' + llvm_suffix() + ',g" ' + + '-e "s,@LLVM_BINDIR@,' + llvm_bindir() + ',g" ' + '-e "s,@RUNLOOP_IMPL@,' + EJS_RUNLOOP_IMPL + ',g" ' + "$SRCDIR/host-config.js.in > $OUT", visibility = ["PUBLIC"], diff --git a/lib/host-config.d.ts b/lib/host-config.d.ts index 28e908b9..bfd1456b 100644 --- a/lib/host-config.d.ts +++ b/lib/host-config.d.ts @@ -1,4 +1,5 @@ // declarations for the GENERATED lib/host-config.js (see // host-config.js.in and the //lib:host-config.js genrule) export const LLVM_SUFFIX: string; +export const LLVM_BINDIR: string; export const RUNLOOP_IMPL: string; diff --git a/lib/host-config.js.in b/lib/host-config.js.in index c8bf019d..6fb37cf4 100644 --- a/lib/host-config.js.in +++ b/lib/host-config.js.in @@ -1,2 +1,3 @@ export let LLVM_SUFFIX = '@LLVM_SUFFIX@'; +export let LLVM_BINDIR = '@LLVM_BINDIR@'; export let RUNLOOP_IMPL = '@RUNLOOP_IMPL@'; diff --git a/node-compat/ejs-node-compat.c b/node-compat/ejs-node-compat.c index 77a06e74..85d10241 100644 --- a/node-compat/ejs-node-compat.c +++ b/node-compat/ejs-node-compat.c @@ -743,16 +743,19 @@ static EJS_NATIVE_FUNC(_ejs_child_process_spawn) { for (uint32_t i = 0; i < EJSARRAY_LEN(argv_rest); i ++) argv[1+i] = ucs2_to_utf8(EJSVAL_TO_FLAT_STRING(ToString(EJSDENSEARRAY_ELEMENTS(argv_rest)[i]))); + // synchronous: returns the child's exit status (127 = exec failed, + // 128+signal for signal deaths, -1 = fork/waitpid failure) so callers + // can stop the build instead of silently continuing past a failed tool + int exit_status = -1; pid_t pid; switch (pid = fork()) { case -1: /* error */ perror("fork"); - printf ("we should totally throw an exception here\n"); break; case 0: /* child */ execvp (argv0, argv); - perror("execv"); - EJS_NOT_REACHED(); + perror(argv0); + _exit(127); break; default: /* parent */ { int stat; @@ -761,17 +764,19 @@ static EJS_NATIVE_FUNC(_ejs_child_process_spawn) { wait_rv = waitpid(pid, &stat, 0); } while (wait_rv == -1 && errno == EINTR); - if (wait_rv != pid) { + if (wait_rv != pid) perror ("waitpid"); - printf ("we should totally throw an exception here\n"); - } + else if (WIFEXITED(stat)) + exit_status = WEXITSTATUS(stat); + else if (WIFSIGNALED(stat)) + exit_status = 128 + WTERMSIG(stat); break; } } for (uint32_t i = 0; i < EJSARRAY_LEN(argv_rest)+1; i ++) free (argv[i]); free (argv); - return _ejs_undefined; + return NUMBER_TO_EJSVAL(exit_status); } ejsval From aa5a5704ffc96dfd6695f5219a7e2fd8c85c3fb3 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 10:47:14 -0700 Subject: [PATCH 107/146] eir: P4.2 slot storage for shaped objects (union flip + GC lessons) Shaped-mode ordinary objects now store their plain data property values in a closureenv slot array at shape-determined indices; the property map only exists in dictionary mode (EJSObject's fourth word is the map|slots union). Slot storage is lazy, so ordinary-object allocation loses the map calloc entirely. ejs-shapes.c became a pure transition/query API (lookup/fields/transition_add+memo/transition_set); the storage engine and one-way to-dictionary materialization live in ejs-object.c. Specops are mode-switched: get/set fast paths, define-own-property shaped routing, delete-migrates, GetOwnProperty synthesizes descriptors into a gc-rooted ring, scan/finalize, and every map-walking site (for-in collect_keys, OwnPropertyKeys with a shared classification loop, getOwnPropertyNames/Symbols, assign, defineProperties). Two GC fixes this phase forced, both found via a hung stage2: - slot arrays must fit the page allocator's largest cell, which is 128 bytes (ffs(256)=9 > 8 LOS-routes exact-256 allocations despite the "= 256" comment): LOS-resident arrays made marking quadratic through the los_list linear lookup. EJS_SHAPE_FIELD_CAP_MAX=14 caps shaped field count (growth 4->8->14); wider objects use dictionary mode. - the fixed 60MB allocation trigger made total GC work quadratic once property storage moved into the GC heap; it now scales with the post-sweep footprint (max(60MB, footprint/2)). Gate: all seven lanes green (test-eir, lowtier, stages 0-3, test-stage1-shapes-off); new test/shapes-storm1.js transition-storm probe is node-identical, byte-identical across EJS_SHAPES on/off, and green under EJS_GC_EVERY_N_ALLOC=7 both modes; microbench: set 3.2x faster than the map, get 1.09x, insert ~3% slower (within the P4.1 <5% bar). Details and numbers in docs/shapes-plan.md. Co-Authored-By: Claude Fable 5 --- docs/shapes-plan.md | 84 ++++++-- runtime/ejs-gc.c | 19 +- runtime/ejs-object.c | 446 +++++++++++++++++++++++++++++++++++------- runtime/ejs-object.h | 10 +- runtime/ejs-shapes.c | 120 ++++++------ runtime/ejs-shapes.h | 89 ++++++--- test/shapes-storm1.js | 153 +++++++++++++++ 7 files changed, 752 insertions(+), 169 deletions(-) create mode 100644 test/shapes-storm1.js diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index 6a56701a..c9714144 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -432,16 +432,71 @@ revertable, runtime phases A/B-able against the old path. collection to fire (finalize-driven), so short probes report 0 deaths — the shapes analog of gc-P0's numbers lands with real workloads in the P4.2 gate. -- [ ] **P4.2 — Slot storage for shaped objects.** The union flip: slot - arrays in the GC heap replace the map for shaped-mode objects; - dictionary migration; specops mode-switch (get/set/define/delete/ - enumerate/scan/finalize); map code untouched for dictionary mode. - *Gate:* full suite + kangax under both modes byte-identical; - transition-storm + collect-every-N stress green; property get/set - microbench vs map recorded (this is the first raw win: no hash, no - strict-eq chain, no descriptor chasing); object allocation is ONE - GC allocation + one slot array (map calloc gone on the shaped - path). +- [x] **P4.2 — Slot storage for shaped objects.** DONE 2026-07-24. + The union flip landed: `EJSObject`'s fourth word is now + `union { EJSPropertyMap* map; ejsval slots; }` — shaped-mode + objects store plain data property values in a **closureenv** slot + array (already GC-allocated, ejsval-range-scanned, and traceable + via its ejsval tag: zero GC changes, `lib/types.ts` untouched + since the word stays pointer-sized and compiled code never + dereferences it). Slot storage is lazy (`_ejs_null` until the + first property; grow-by-doubling from 4), so ordinary-object + allocation lost the map calloc entirely. ejs-shapes.c became a + pure transition/query API (`_ejs_shape_lookup` / `_fields` / + `_transition_add(+memo fast path)` / `_transition_set`); the + storage engine and the one-way `_ejs_object_to_dictionary` + (materialize map from shape+slots, malloc-only, no GC points) + live in ejs-object.c. Specops mode-switched: get (fast-path slot + load), set (fast-path store on the receiver incl. repr-flip + transition), define (shaped routing for plain default-attr data + props; everything else migrates then falls into the untouched + generic algorithm), delete (migrate then map-remove), + GetOwnProperty (synthesizes the default data descriptor into a + 32-entry gc-rooted static ring — safe because every + descriptor-mutating path migrates first), scan/finalize, plus the + map-walking sites: collect_keys (for-in), OwnPropertyKeys (shared + classification loop keeps the two modes byte-identical), + getOwnPropertyNames/Symbols, Object.assign, defineProperties. + **The stage2 lesson (found at this gate, the hard way):** the + first cut hung stage2's self-compile for hours at 100% CPU inside + GC marks. Two causes, both fixed here: (1) slot arrays of + capacity 32+ exceed the page allocator's largest cell — which is + **128 bytes**, not the 256 its comment claims (`ffs(256)=9 > 8` + LOS-routes exact-256 allocations) — so every wide object's storage + landed in the LOS, whose **per-reference linear lookup** made + marking quadratic (multi-minute marks of a 183MB heap; lldb kept + landing on the los_list walk at ejs-gc.c:550). Fix: + `EJS_SHAPE_FIELD_CAP_MAX = 14` (16B env header + 14×8 = exactly + 128B; growth 4→8→14); 15+-field objects drop to dictionary mode. + Revisit when gc-plan gives the LOS an O(log n) lookup or a 256B + size class. (2) the collection trigger was a **fixed 60MB of + allocation** — quadratic total GC work on a growing live set now + that property storage lives in the GC heap. Fix in ejs-gc.c: the + trigger scales to max(60MB, post-sweep-footprint/2); programs + under 120MB footprint keep the old cadence exactly. With both + fixes stage2's self-compile completes normally (ejs-process CPU: + 92s shapes-on vs 62s off on the same binary — the ~1.5× is env + alloc churn plus wide-object migrate-through; the raw win arrives + with P4.3's guarded fast paths, and P4.5/gc-P5 own the layout + end-state). + *Gate results:* matrix green — test-eir, lowtier, stages 0-3, and + the `//:test-stage1-shapes-off` A/B lane (no kangax runner exists + in-repo; the stage suite + the new probe stand in). New + `test/shapes-storm1.js` transition-storm probe (adds, repr flips, + deletes, attrs/accessor/symbol/index migrations, freeze/seal, + enumeration order, assign/defineProperties/JSON): node-identical, + byte-identical across EJS_SHAPES on/off, and green under + EJS_GC_EVERY_N_ALLOC=7 in both modes. Microbench (300k objects × + 8 atom-keyed fields, 20 passes, interleaved runs, post-fix): + **set 3.2× faster** than the map (6.35s vs 19.9s — no hash, no + strict-eq chain, no descriptor churn), **get 1.09×** (5.95s vs + 6.47s; the generic-call overhead still dominates — the raw win is + P4.3's guarded fast paths), insert 8×N **~3% slower** (1.93s vs + 1.88s: one closureenv alloc + one grow-copy per 8-field object — + within the P4.1 <5% bar, and the shaped path now does real work + instead of dual bookkeeping). Census on the storm probe: 383 + born tracked, 315 shapes, 1365 transitions (48% memo fast hits), + 210 repr flips, migrations correctly attributed. - [ ] **P4.3 — Guarded fast paths under --types.** The compiler phase: `has_shape`/`slot_load`/`slot_store` ops, verifier rules incl. the effect-kill inventory, emitter (header-index compare; slot-array @@ -575,9 +630,14 @@ layout change whichever lands first. recorded. DONE 2026-07-23 — see the phased-plan entry above for the numbers (2.1% insert overhead via the inlined transition memo). -- [ ] **P4.2** slot storage + dictionary migration, specops mode-switch. +- [x] **P4.2** slot storage + dictionary migration, specops mode-switch. Gate: both-modes byte-identical suite+kangax, stress green, - microbench recorded. + microbench recorded. DONE 2026-07-24 — see the phased-plan entry + above (set 3.2×, get 1.09×, insert -3%; storm probe + gc-stress + green both modes; no in-repo kangax, suite+probe stand in; NOTE + the stage2 GC lesson recorded there: shaped field cap 14 keeps + slot arrays out of the LOS, and the gc trigger now scales with + heap footprint). - [ ] **P4.3** EIR ops + verifier inventory + emitter + maam node-identity queries + guarded diamonds + shape facts in optimize-guards. Gate: matrix, lane 0-divergent, wrong-oracle diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index f01316b1..dbbbe0f1 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -1241,6 +1241,16 @@ calc_heap_size() return size; } +// heap footprint measured after the last collection's sweep. The +// collection trigger scales with this: a fixed allocation budget on a +// growing live set makes total GC work quadratic in heap size (shapes +// P4.2 moved per-object property storage into the GC heap, which pushed +// stage2's self-compile off that cliff — hours of back-to-back full +// marks of a ~900MB heap). Letting the heap grow ~50% between full +// collections keeps total mark work linear; programs whose footprint +// stays under 120MB see the old 60MB cadence exactly. +static size_t heap_size_at_last_gc = 0; + void _ejs_gc_collect(const char *reason) { @@ -1255,6 +1265,10 @@ _ejs_gc_collect(const char *reason) _ejs_gc_collect_inner(EJS_FALSE); + // post-sweep footprint drives the proportional collection trigger + // (see heap_size_at_last_gc) + heap_size_at_last_gc = calc_heap_size(); + #if gc_timings > 0 gettimeofday (&tvafter, NULL); @@ -1405,7 +1419,10 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) if (!gc_disabled) { char *gc_reason = NULL; - if (alloc_size - alloc_size_at_last_gc >= 60 * 1024 * 1024) { + size_t gc_trigger = 60 * 1024 * 1024; + if (heap_size_at_last_gc / 2 > gc_trigger) + gc_trigger = heap_size_at_last_gc / 2; + if (alloc_size - alloc_size_at_last_gc >= gc_trigger) { gc_reason = "alloc_size"; } else if (collect_every_alloc && collect_every_alloc == num_allocs) { gc_reason = "every_n_alloc"; diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 4a635f9a..89e13160 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -30,6 +30,7 @@ #include "ejs-error.h" #include "ejs-xhr.h" #include "ejs-shapes.h" +#include "ejs-closureenv.h" // ES6 7.3.1 // Get (O, P) @@ -572,6 +573,112 @@ _ejs_propertymap_insert (EJSPropertyMap* map, ejsval name, EJSPropertyDesc* desc } } +// ------------------------------------------------------------------------ +// shaped-mode slot storage (shapes-plan P4.2). Ordinary objects with a +// nonzero shape index keep their plain data property values in a +// closureenv slot array at shape-determined indices; the map only exists +// in dictionary mode. EJS_SHAPE_CAP is clamped to 256, so fixed +// 256-entry name buffers cover any shape. + +static EJSClosureEnv* +shaped_env (EJSObject* obj) +{ + return EJSVAL_TO_CLOSUREENV_IMPL(obj->slots); +} + +static ejsval* +shaped_slots (EJSObject* obj) +{ + return shaped_env(obj)->slots; +} + +// grow slot storage to hold at least `needed` values. May allocate from +// the GC heap: obj->slots stays attached (and scanned) until the copy is +// done, so a collection triggered by the new array is safe. Growth is +// 4 -> 8 -> EJS_SHAPE_FIELD_CAP_MAX (=14): the final step lands exactly +// on the page allocator's largest (128-byte) cell so a slot array never +// reaches the LOS (whose linear lookup makes marking quadratic). +static void +shaped_ensure_capacity (EJSObject* obj, uint32_t needed) +{ + EJS_ASSERT(needed <= EJS_SHAPE_FIELD_CAP_MAX); + uint32_t cap = EJSVAL_IS_NULL(obj->slots) ? 0 : shaped_env(obj)->length; + if (needed <= cap) + return; + uint32_t newcap = cap ? cap * 2 : 4; + while (newcap < needed) + newcap *= 2; + if (newcap > EJS_SHAPE_FIELD_CAP_MAX) + newcap = EJS_SHAPE_FIELD_CAP_MAX; + ejsval newslots = _ejs_closureenv_new (newcap); + if (cap) + memcpy (EJSVAL_TO_CLOSUREENV_IMPL(newslots)->slots, shaped_slots(obj), + cap * sizeof(ejsval)); + obj->slots = newslots; +} + +// one-way migration to dictionary mode: materialize the map from the +// shape's fields + the slot array, then flip the header index. Nothing +// here allocates from the GC heap, so the union flip is atomic as far as +// the collector is concerned. +static void +_ejs_object_to_dictionary (EJSObject* obj, EJSShapeMigrateReason reason) +{ + uint32_t shape = EJS_OBJECT_SHAPE(obj); + EJS_ASSERT(shape != EJS_SHAPE_DICT); + + uint32_t nfields = _ejs_shape_field_count(shape); + ejsval names[256]; + EJS_ASSERT(nfields <= 256); + _ejs_shape_fields (shape, names); + + ejsval slotsval = obj->slots; + EJSPropertyMap* map = (EJSPropertyMap*)calloc (sizeof(EJSPropertyMap), 1); + _ejs_propertymap_init (map); + for (uint32_t i = 0; i < nfields; i ++) { + EJSPropertyDesc* desc = _ejs_propertydesc_new(); + _ejs_property_desc_set_value (desc, EJSVAL_TO_CLOSUREENV_IMPL(slotsval)->slots[i]); + _ejs_property_desc_set_writable (desc, EJS_TRUE); + _ejs_property_desc_set_enumerable (desc, EJS_TRUE); + _ejs_property_desc_set_configurable (desc, EJS_TRUE); + _ejs_propertymap_insert (map, names[i], desc); + } + obj->map = map; + _ejs_shape_object_migrate (obj, reason); +} + +// shaped GetOwnProperty synthesizes the default data descriptor for a +// slot into a static ring. Entries are transient — valid until +// SYNTH_DESC_RING subsequent shaped GetOwnProperty hits — which the +// spec-algorithm callers respect (none holds a descriptor across more +// than a couple of lookups). Every path that would MUTATE a property +// through its descriptor migrates the object to dictionary mode first, +// so writes through synthesized descriptors cannot happen. The ring's +// ejsvals are registered as gc roots: callers may hold a descriptor +// across an allocating call. +#define SYNTH_DESC_RING 32 +static EJSPropertyDesc synth_descs[SYNTH_DESC_RING]; +static int synth_desc_next = -1; + +static EJSPropertyDesc* +shaped_synthesize_desc (ejsval value) +{ + if (synth_desc_next < 0) { + for (int i = 0; i < SYNTH_DESC_RING; i ++) { + synth_descs[i].value = _ejs_undefined; + synth_descs[i].setter = _ejs_undefined; + _ejs_gc_add_root (&synth_descs[i].value); + _ejs_gc_add_root (&synth_descs[i].setter); + } + synth_desc_next = 0; + } + EJSPropertyDesc* desc = &synth_descs[synth_desc_next]; + synth_desc_next = (synth_desc_next + 1) % SYNTH_DESC_RING; + desc->flags = EJS_PROP_FLAGS_VALUE_SET | EJS_PROP_WRITABLE | EJS_PROP_ENUMERABLE | EJS_PROP_CONFIGURABLE; + desc->value = value; + return desc; +} + /* property iterators */ struct _EJSPropertyIterator { EJSObject obj; @@ -646,6 +753,26 @@ collect_keys (ejsval objval, int *num, int *alloc, ejsval **keys) EJSObject *obj = EJSVAL_TO_OBJECT(objval); EJS_ASSERT(obj); + // shapes P4.2: shaped objects enumerate the shape chain (all fields + // are enumerable by construction; the chain is insertion order) + uint32_t shape = EJS_OBJECT_SHAPE(obj); + if (shape != EJS_SHAPE_DICT) { + uint32_t nfields = _ejs_shape_field_count(shape); + ejsval names[256]; + _ejs_shape_fields (shape, names); + for (uint32_t i = 0; i < nfields; i ++) { + if (!name_in_keys (names[i], *keys, *num)) { + if (*num == *alloc-1) { + (*alloc) += 10; + *keys = (ejsval*)realloc (*keys, (*alloc) * sizeof(ejsval)); + } + (*keys)[(*num)++] = names[i]; + } + } + collect_keys (obj->proto, num, alloc, keys); + return; + } + for (_EJSPropertyMapEntry *s = obj->map->head_insert; s; s = s->next_insert) { if (_ejs_property_desc_is_enumerable (s->desc) && !name_in_keys (s->name, *keys, *num)) { if (*num == *alloc-1) { @@ -755,14 +882,19 @@ _ejs_init_object (EJSObject* obj, ejsval proto, EJSSpecOps *ops) { obj->proto = proto; obj->ops = ops ? ops : &_ejs_Object_specops; - obj->map = calloc (sizeof(EJSPropertyMap), 1); - _ejs_propertymap_init (obj->map); - //printf ("obj->map = %p\n", obj->map); - EJS_OBJECT_SET_EXTENSIBLE(obj); - // shapes P4.1: ordinary objects are born with the root shape and get - // dual-bookkept shape indices; everything else stays shape 0 - if (obj->ops == &_ejs_Object_specops) + // shapes P4.2: ordinary objects are born with the root shape and + // lazily-allocated slot storage — no map calloc on this path; + // everything else (and every object under EJS_SHAPES=off) is + // dictionary-mode from birth + if (obj->ops == &_ejs_Object_specops && _ejs_shapes_tracking) { + obj->slots = _ejs_null; _ejs_shape_object_born (obj); + } + else { + obj->map = calloc (sizeof(EJSPropertyMap), 1); + _ejs_propertymap_init (obj->map); + } + EJS_OBJECT_SET_EXTENSIBLE(obj); #if notyet ((GCObjectPtr)obj)->gc_data = 0x01; // HAS_FINALIZE #endif @@ -1104,6 +1236,18 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyNames) { /* 3. Let n be 0. */ + // shapes P4.2: shaped objects report their (all-enumerable, + // string-keyed) shape fields in insertion order + uint32_t O_shape = EJS_OBJECT_SHAPE(O_); + if (O_shape != EJS_SHAPE_DICT) { + uint32_t nfields = _ejs_shape_field_count(O_shape); + ejsval names[256]; + _ejs_shape_fields (O_shape, names); + for (uint32_t i = 0; i < nfields; i ++) + _ejs_array_push_dense(arr, 1, &names[i]); + return arr; + } + /* 4. For each named own property P of O */ for (_EJSPropertyMapEntry* s = O_->map->head_insert; s; s = s->next_insert) { if (!_ejs_property_desc_is_enumerable(s->desc)) @@ -1114,7 +1258,7 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyNames) { if (!EJSVAL_IS_SYMBOL(name)) { /* b. Call the [[DefineOwnProperty]] internal method of array with arguments ToString(n), the - PropertyDescriptor {[[Value]]: name, [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: + PropertyDescriptor {[[Value]]: name, [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false. */ _ejs_array_push_dense(arr, 1, &name); } @@ -1139,12 +1283,16 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertySymbols) { } EJSObject* O_ = EJSVAL_TO_OBJECT(O); - /* 2. Let array be the result of creating a new object as if by the expression new Array () where Array is the + /* 2. Let array be the result of creating a new object as if by the expression new Array () where Array is the standard built-in constructor with that name. */ ejsval arr = _ejs_array_new(0, EJS_FALSE); /* 3. Let n be 0. */ + // shapes P4.2: shaped objects never carry symbol-keyed properties + if (EJS_OBJECT_SHAPE(O_) != EJS_SHAPE_DICT) + return arr; + /* 4. For each named own property P of O */ for (_EJSPropertyMapEntry* s = O_->map->head_insert; s; s = s->next_insert) { if (!_ejs_property_desc_is_enumerable(s->desc)) @@ -1206,10 +1354,24 @@ static EJS_NATIVE_FUNC(_ejs_Object_assign) { // i. Let gotAllNames be false. //EJSBool gotAllNames = EJS_FALSE; XXX this is unused - // j. Let pendingException be undefined. + // j. Let pendingException be undefined. ejsval pendingException = _ejs_undefined; - // k. Repeat while nextIndex < len, + // shapes P4.2: a shaped source enumerates its shape fields (all + // enumerable plain data properties, in insertion order) + uint32_t from_shape = EJS_OBJECT_SHAPE(from_); + if (from_shape != EJS_SHAPE_DICT) { + uint32_t nfields = _ejs_shape_field_count(from_shape); + ejsval names[256]; + _ejs_shape_fields (from_shape, names); + for (uint32_t i = 0; i < nfields; i ++) { + ejsval propValue = OP(from_,Get)(from, names[i], from); + Put(to, names[i], propValue, EJS_TRUE); + } + continue; + } + + // k. Repeat while nextIndex < len, for (_EJSPropertyMapEntry* s = from_->map->head_insert; s; s = s->next_insert) { // i. Let nextKey be Get(keysArray, ToString(nextIndex)). // ii. ReturnIfAbrupt(nextKey). @@ -1355,21 +1517,35 @@ static EJS_NATIVE_FUNC(_ejs_Object_defineProperties) { /* 3. Let names be an internal list containing the names of each enumerable own property of props. */ int names_len = 0; - for (_EJSPropertyMapEntry *s = props_obj->map->head_insert; s; s = s->next_insert) { - if (_ejs_property_desc_is_enumerable (s->desc)) - names_len ++; + ejsval* names; + // shapes P4.2: a shaped props object enumerates its shape fields + uint32_t props_shape = EJS_OBJECT_SHAPE(props_obj); + if (props_shape != EJS_SHAPE_DICT) { + names_len = (int)_ejs_shape_field_count(props_shape); + if (names_len == 0) { + /* no enumerable properties, bail early */ + return O; + } + names = malloc(names_len * sizeof(ejsval)); + _ejs_shape_fields (props_shape, names); } + else { + for (_EJSPropertyMapEntry *s = props_obj->map->head_insert; s; s = s->next_insert) { + if (_ejs_property_desc_is_enumerable (s->desc)) + names_len ++; + } - if (names_len == 0) { - /* no enumerable properties, bail early */ - return O; - } + if (names_len == 0) { + /* no enumerable properties, bail early */ + return O; + } - ejsval* names = malloc(names_len * sizeof(ejsval)); - int n = 0; - for (_EJSPropertyMapEntry *s = props_obj->map->head_insert; s; s = s->next_insert) { - if (_ejs_property_desc_is_enumerable(s->desc)) - names[n++] = s->name; + names = malloc(names_len * sizeof(ejsval)); + int n = 0; + for (_EJSPropertyMapEntry *s = props_obj->map->head_insert; s; s = s->next_insert) { + if (_ejs_property_desc_is_enumerable(s->desc)) + names[n++] = s->name; + } } /* 4. Let descriptors be an empty internal List. */ @@ -2049,9 +2225,23 @@ _ejs_object_specop_get (ejsval O, ejsval P, ejsval Receiver) if (EJSVAL_IS_STRING(pname) && !ucs2_strcmp(_ejs_ucs2___proto__, EJSVAL_TO_FLAT_STRING(pname))) return OP(EJSVAL_TO_OBJECT(O),GetPrototypeOf) (O); - // 2. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with argument P. - // 3. ReturnIfAbrupt(desc). - EJSPropertyDesc* desc = OP(EJSVAL_TO_OBJECT(O),GetOwnProperty) (O, P, NULL); + // 2. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with argument P. + // 3. ReturnIfAbrupt(desc). + EJSPropertyDesc* desc; + EJSObject* O_ = EJSVAL_TO_OBJECT(O); + uint32_t O_shape = EJS_OBJECT_SHAPE(O_); + if (O_shape != EJS_SHAPE_DICT) { + // shapes P4.2 fast path: a hit is a fixed-index slot load; a + // miss (including symbol keys, which shaped objects never + // carry) falls to the proto walk below + uint32_t slot; + if (EJSVAL_IS_STRING(pname) && _ejs_shape_lookup (O_shape, pname, &slot)) + return shaped_slots(O_)[slot]; + desc = NULL; + } + else { + desc = OP(O_,GetOwnProperty) (O, P, NULL); + } // 4. If desc is undefined, then if (desc == NULL) { @@ -2095,6 +2285,18 @@ _ejs_object_specop_get_own_property (ejsval obj, ejsval propertyName, ejsval* ex ejsval property_str = ToPropertyKey(propertyName); EJSObject* obj_ = EJSVAL_TO_OBJECT(obj); + // shapes P4.2: shaped objects synthesize the default data + // descriptor from the slot (their fields are always plain + // writable/enumerable/configurable string-keyed data properties) + uint32_t shape = EJS_OBJECT_SHAPE(obj_); + if (shape != EJS_SHAPE_DICT) { + uint32_t slot; + if (EJSVAL_IS_STRING(property_str) && + _ejs_shape_lookup (shape, property_str, &slot)) + return shaped_synthesize_desc (shaped_slots(obj_)[slot]); + return NULL; + } + return _ejs_propertymap_lookup (obj_->map, property_str); } @@ -2104,10 +2306,33 @@ _ejs_object_specop_set (ejsval O, ejsval P, ejsval V, ejsval Receiver) { EJSPropertyDesc undefined_desc = { .value = _ejs_undefined, .flags = EJS_PROP_FLAGS_VALUE_SET | EJS_PROP_WRITABLE | EJS_PROP_ENUMERABLE | EJS_PROP_CONFIGURABLE }; - // 1. Assert: IsPropertyKey(P) is true. + // 1. Assert: IsPropertyKey(P) is true. P = ToPropertyKey(P); // XXX this shouldn't be necessary, but ejs passes numbers here - - // 2. Let ownDesc be the result of calling the [[GetOwnProperty]] internal method of O with argument P. + + // shapes P4.2 fast path: a store to an existing shaped field on the + // receiver itself is a repr check + slot store (shaped fields are + // always plain writable data properties). Absent fields take the + // generic path below — its proto walk and CreateDataProperty + // ending land back in the shaped DefineOwnProperty. + if (EJSVAL_EQ(O, Receiver)) { + EJSObject* O_ = EJSVAL_TO_OBJECT(O); + uint32_t O_shape = EJS_OBJECT_SHAPE(O_); + uint32_t slot; + if (O_shape != EJS_SHAPE_DICT && EJSVAL_IS_STRING(P) && + _ejs_shape_lookup (O_shape, P, &slot)) { + uint32_t next_shape = _ejs_shape_transition_set (O_shape, slot, V); + if (next_shape != EJS_SHAPE_DICT) { + EJS_OBJECT_SET_SHAPE(O_, next_shape); + shaped_slots(O_)[slot] = V; + return EJS_TRUE; + } + // shape-table overflow: drop to dictionary mode and let the + // generic path store through the map + _ejs_object_to_dictionary (O_, EJS_SHAPE_MIGRATE_TABLE_FULL); + } + } + + // 2. Let ownDesc be the result of calling the [[GetOwnProperty]] internal method of O with argument P. // 3. ReturnIfAbrupt(ownDesc). EJSPropertyDesc* ownDesc = OP(EJSVAL_TO_OBJECT(O),GetOwnProperty)(O, P, NULL); @@ -2212,9 +2437,10 @@ _ejs_object_specop_delete (ejsval O, ejsval P, EJSBool Throw) /* 3. If desc.[[Configurable]] is true, then */ if (_ejs_property_desc_is_configurable(desc)) { /* a. Remove the own property with name P from O. */ + // shapes P4.2: deletes are a dictionary-mode affair + if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) + _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_DELETE); _ejs_propertymap_remove (obj->map, P); - // shapes P4.1: delete of a tracked field drops to dictionary - _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_DELETE); /* b. Return true. */ return EJS_TRUE; } @@ -2238,6 +2464,69 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des EJS_MACRO_END EJSObject* obj = EJSVAL_TO_OBJECT(O); + + // shapes P4.2: route shaped objects up front. Plain default- + // attribute data properties live in slot storage; anything the + // shaped world can't express migrates to dictionary mode and falls + // into the generic algorithm below. (Absent property on a + // non-extensible object also falls through: the generic step 3 + // rejects without touching storage.) + uint32_t obj_shape = EJS_OBJECT_SHAPE(obj); + if (obj_shape != EJS_SHAPE_DICT) { + if (_ejs_property_desc_has_getter(Desc) || _ejs_property_desc_has_setter(Desc)) + _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_ACCESSOR); + else if (!EJSVAL_IS_STRING(P)) + _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_SYMBOL_KEY); + else { + uint32_t slot; + if (_ejs_shape_lookup (obj_shape, P, &slot)) { + // existing field: attribute-lowering migrates; a value + // update is a repr check + slot store (attributes are + // all true already, so re-asserting them is a no-op) + if ((_ejs_property_desc_has_writable(Desc) && !_ejs_property_desc_is_writable(Desc)) || + (_ejs_property_desc_has_enumerable(Desc) && !_ejs_property_desc_is_enumerable(Desc)) || + (_ejs_property_desc_has_configurable(Desc) && !_ejs_property_desc_is_configurable(Desc))) + _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_ATTRS); + else if (_ejs_property_desc_has_value(Desc)) { + ejsval value = _ejs_property_desc_get_value(Desc); + uint32_t next_shape = _ejs_shape_transition_set (obj_shape, slot, value); + if (next_shape == EJS_SHAPE_DICT) + _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_TABLE_FULL); + else { + EJS_OBJECT_SET_SHAPE(obj, next_shape); + shaped_slots(obj)[slot] = value; + return EJS_TRUE; + } + } + else + return EJS_TRUE; + } + else if (EJS_OBJECT_IS_EXTENSIBLE(obj)) { + // absent field: only a creation with all-default + // attributes stays shaped (absent attribute fields + // default to false per the spec's step 4a) + if (!_ejs_property_desc_is_writable(Desc) || + !_ejs_property_desc_is_enumerable(Desc) || + !_ejs_property_desc_is_configurable(Desc)) + _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_ATTRS); + else { + ejsval value = _ejs_property_desc_get_value(Desc); + EJSShapeMigrateReason reason; + uint32_t next_shape = _ejs_shape_transition_add_fast (obj_shape, P, value, &reason); + if (next_shape == EJS_SHAPE_DICT) + _ejs_object_to_dictionary (obj, reason); + else { + uint32_t nfields = _ejs_shape_field_count(next_shape); + shaped_ensure_capacity (obj, nfields); + EJS_OBJECT_SET_SHAPE(obj, next_shape); + shaped_slots(obj)[nfields - 1] = value; + return EJS_TRUE; + } + } + } + } + } + /* 1. Let current be the result of calling the [[GetOwnProperty]] internal method of O with property name P. */ EJSPropertyDesc* current = OP(obj, GetOwnProperty)(O, P, NULL); @@ -2284,19 +2573,6 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des } _ejs_propertymap_insert (obj->map, P, dest); - // shapes P4.1: a plain writable/enumerable/configurable data - // property extends the shape; anything else drops to dictionary - if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { - if (_ejs_property_desc_has_getter(dest) || _ejs_property_desc_has_setter(dest)) - _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ACCESSOR); - else if (!_ejs_property_desc_is_writable(dest) || - !_ejs_property_desc_is_enumerable(dest) || - !_ejs_property_desc_is_configurable(dest)) - _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ATTRS); - else - _ejs_shape_object_add_fast (obj, P, _ejs_property_desc_get_value(dest)); - } - /* c. Return true. */ return EJS_TRUE; } @@ -2412,20 +2688,6 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des if (_ejs_property_desc_has_writable (Desc)) _ejs_property_desc_set_writable (dest, _ejs_property_desc_is_writable (Desc)); - // shapes P4.1: accessor conversion and non-default attributes drop to - // dictionary (freeze/seal land here via SetIntegrityLevel); a plain - // value update gets the repr-flip check - if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { - if (_ejs_property_desc_has_getter(Desc) || _ejs_property_desc_has_setter(Desc)) - _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ACCESSOR); - else if ((_ejs_property_desc_has_writable(Desc) && !_ejs_property_desc_is_writable(Desc)) || - (_ejs_property_desc_has_enumerable(Desc) && !_ejs_property_desc_is_enumerable(Desc)) || - (_ejs_property_desc_has_configurable(Desc) && !_ejs_property_desc_is_configurable(Desc))) - _ejs_shape_object_migrate (obj, EJS_SHAPE_MIGRATE_ATTRS); - else if (_ejs_property_desc_has_value(Desc)) - _ejs_shape_object_set (obj, P, _ejs_property_desc_get_value(Desc)); - } - /* 13. Return true. */ return EJS_TRUE; } @@ -2440,8 +2702,10 @@ void _ejs_object_specop_finalize(EJSObject* obj) { _ejs_shape_object_died (obj); - //printf ("_ejs_propertymap_free(obj->map = %p)\n", obj->map); - _ejs_propertymap_free (obj->map); + // shapes P4.2: shaped objects have no map; their slot array is GC + // memory and needs no finalization + if (EJS_OBJECT_SHAPE(obj) == EJS_SHAPE_DICT && obj->map) + _ejs_propertymap_free (obj->map); obj->map = NULL; } @@ -2464,6 +2728,15 @@ scan_property (ejsval name, EJSPropertyDesc *desc, EJSValueFunc scan_func) static void _ejs_object_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { + // shapes P4.2: shaped objects trace their slot array (a closureenv, + // which scans its own ejsval range); field names are rooted by the + // global shape table + if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { + if (!EJSVAL_IS_NULL(obj->slots)) + scan_func (obj->slots); + scan_func (obj->proto); + return; + } _ejs_propertymap_foreach_property (obj->map, (EJSPropertyDescFunc)scan_property, scan_func); scan_func (obj->proto); } @@ -2523,16 +2796,43 @@ _ejs_object_specop_own_property_keys (ejsval O) { EJSObject* O_ = EJSVAL_TO_OBJECT(O); - ejsval* numberkeys = malloc(sizeof(ejsval) *O_->map->inuse); + // shapes P4.2: snapshot the own property names from whichever store + // this object uses; the classification below is shared so the two + // modes stay byte-identical + uint32_t O_shape = EJS_OBJECT_SHAPE(O_); + int nprops; + ejsval shaped_names[256]; + if (O_shape != EJS_SHAPE_DICT) { + nprops = (int)_ejs_shape_field_count(O_shape); + _ejs_shape_fields (O_shape, shaped_names); + } + else { + nprops = O_->map->inuse; + } + + ejsval* numberkeys = malloc(sizeof(ejsval) * nprops); int num_numberkeys = 0; - ejsval* stringkeys = malloc(sizeof(ejsval) *O_->map->inuse); + ejsval* stringkeys = malloc(sizeof(ejsval) * nprops); int num_stringkeys = 0; - ejsval* symbolkeys = malloc(sizeof(ejsval) *O_->map->inuse); + ejsval* symbolkeys = malloc(sizeof(ejsval) * nprops); int num_symbolkeys = 0; - // 1. Let keys be a new empty List. - for (_EJSPropertyMapEntry *s = O_->map->head_insert; s; s = s->next_insert) { - if (EJSVAL_IS_STRING(s->name)) { - ejsval idx_val = ToNumber(s->name); + // 1. Let keys be a new empty List. + _EJSPropertyMapEntry *s = O_shape == EJS_SHAPE_DICT ? O_->map->head_insert : NULL; + for (int i = 0; ; i ++) { + ejsval name; + if (O_shape != EJS_SHAPE_DICT) { + if (i >= nprops) + break; + name = shaped_names[i]; + } + else { + if (!s) + break; + name = s->name; + s = s->next_insert; + } + if (EJSVAL_IS_STRING(name)) { + ejsval idx_val = ToNumber(name); if (EJSVAL_IS_NUMBER(idx_val)) { double n = EJSVAL_TO_NUMBER(idx_val); if (n >= 0 && floor(n) == n) { @@ -2540,18 +2840,18 @@ _ejs_object_specop_own_property_keys (ejsval O) // a. Add P as the last element of keys. // we just append them as we do strings/symbols below. we'll sort after our pass over the map - numberkeys[num_numberkeys++] = s->name; + numberkeys[num_numberkeys++] = name; continue; } } - // 3. For each own property key P of O that is a String but is not an integer index, in property creation order - // a. Add P as the last element of keys. - stringkeys[num_stringkeys++] = s->name; + // 3. For each own property key P of O that is a String but is not an integer index, in property creation order + // a. Add P as the last element of keys. + stringkeys[num_stringkeys++] = name; } else { // 4. For each own property key P of O that is a Symbol, in property creation order - // a. Add P as the last element of keys. - symbolkeys[num_symbolkeys++] = s->name; + // a. Add P as the last element of keys. + symbolkeys[num_symbolkeys++] = name; } } diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index 09b42837..85ccc6fe 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -230,7 +230,15 @@ struct _EJSObject { GCObjectHeader gc_header; EJSSpecOps* ops; ejsval proto; // [[Prototype]] - EJSPropertyMap* map; + // shapes-plan P4.2: property storage is mode-switched on the + // header's shape index. Dictionary mode (shape 0) keeps the map; + // shaped mode stores plain data property values in a closureenv + // slot array (an ejsval so the GC scan traces it; _ejs_null until + // the first property arrives) at shape-determined indices. + union { + EJSPropertyMap* map; // dictionary mode + ejsval slots; // shaped mode + }; }; diff --git a/runtime/ejs-shapes.c b/runtime/ejs-shapes.c index 7da33d3e..78ca35f6 100644 --- a/runtime/ejs-shapes.c +++ b/runtime/ejs-shapes.c @@ -1,10 +1,12 @@ /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=4 sw=4 et tw=99 ft=cpp: * - * Runtime shape tracking (shapes-plan P4.1). Pure bookkeeping in this - * phase: the property map remains the store; ordinary objects carry a - * shape index maintained by the hooks below, and the census (dumped at - * exit under EJS_SHAPES_CENSUS) records what real programs do with it. + * Runtime shape tracking (shapes-plan P4.1/P4.2). This module owns the + * global interned shape table and the transition cache; since P4.2 the + * object layer (ejs-object.c) stores shaped objects' property values in + * slot arrays at the indices this table dictates, via the transition / + * lookup API below. The census (dumped at exit under EJS_SHAPES_CENSUS) + * records what real programs do with it. */ #include @@ -29,8 +31,10 @@ static uint32_t shape_count; /* next unallocated index; starts at 2 (0 = EJSBool _ejs_shapes_tracking = EJS_FALSE; static EJSBool census_enabled = EJS_FALSE; -static uint32_t shape_field_cap = 64; /* runtime twin of maam's shapeCap; - EJS_SHAPE_CAP overrides */ +/* runtime twin of maam's shapeCap; EJS_SHAPE_CAP overrides (clamped to + EJS_SHAPE_FIELD_CAP_MAX — see its comment in ejs-shapes.h for why the + ceiling is a page-allocator cell, not a semantic choice) */ +static uint32_t shape_field_cap = EJS_SHAPE_FIELD_CAP_MAX; /* transition cache: open-addressed (parent, name, repr) -> child. child == 0 marks an empty slot (shape 0 is never a transition target) */ @@ -208,17 +212,12 @@ _ejs_shape_object_migrate(EJSObject *obj, EJSShapeMigrateReason reason) stat_migrations[reason]++; } -void -_ejs_shape_object_add(EJSObject *obj, ejsval name, ejsval value) +uint32_t +_ejs_shape_transition_add(uint32_t shape, ejsval name, ejsval value, + EJSShapeMigrateReason *reason) { - uint32_t shape = EJS_OBJECT_SHAPE(obj); - if (shape == EJS_SHAPE_DICT) - return; - - if (!EJSVAL_IS_STRING(name)) { - _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_SYMBOL_KEY); - return; - } + EJS_ASSERT(shape != EJS_SHAPE_DICT); + EJS_ASSERT(EJSVAL_IS_STRING(name)); /* numeric/index-looking keys stay in the map (arrays own indexed storage; indexed access on plain objects is rare enough to eat it) */ @@ -228,28 +227,56 @@ _ejs_shape_object_add(EJSObject *obj, ejsval name, ejsval value) ? namestr->data.flat[0] : _ejs_string_ucs2_at(namestr, 0); if (c0 >= '0' && c0 <= '9') { - _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_INDEX_KEY); - return; + *reason = EJS_SHAPE_MIGRATE_INDEX_KEY; + return EJS_SHAPE_DICT; } } EJSShape *cur = shape_get(shape); if (cur->field_count >= shape_field_cap) { - _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_CAP); - return; + *reason = EJS_SHAPE_MIGRATE_CAP; + return EJS_SHAPE_DICT; } uint32_t child = transition_find_or_add(shape, name, classify_repr(value)); if (child == EJS_SHAPE_DICT) { - _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_TABLE_FULL); - return; + *reason = EJS_SHAPE_MIGRATE_TABLE_FULL; + return EJS_SHAPE_DICT; } - EJS_OBJECT_SET_SHAPE(obj, child); _ejs_shape_stat_transitions++; uint32_t depth = shape_get(child)->field_count; if (depth > stat_max_depth) stat_max_depth = depth; + return child; +} + +EJSBool +_ejs_shape_lookup(uint32_t shape, ejsval name, uint32_t *slot) +{ + uint32_t s = shape; + while (s != EJS_SHAPE_DICT) { + EJSShape *cur = shape_get(s); + if (cur->field_count == 0) + break; + if (shape_name_eq(cur->name, name)) { + *slot = cur->field_count - 1; + return EJS_TRUE; + } + s = cur->parent; + } + return EJS_FALSE; +} + +void +_ejs_shape_fields(uint32_t shape, ejsval *names) +{ + uint32_t s = shape; + for (uint32_t i = shape_get(shape)->field_count; i > 0; i--) { + EJSShape *cur = shape_get(s); + names[i - 1] = cur->name; + s = cur->parent; + } } /* rebuild the chain with `field_index`'s repr changed: the sibling shape a @@ -282,45 +309,26 @@ shape_flip_repr(uint32_t shape, uint32_t field_index, uint8_t new_repr) return rebuilt; } -void -_ejs_shape_object_set(EJSObject *obj, ejsval name, ejsval value) +uint32_t +_ejs_shape_transition_set(uint32_t shape, uint32_t slot_index, ejsval value) { - uint32_t shape = EJS_OBJECT_SHAPE(obj); - if (shape == EJS_SHAPE_DICT) - return; - - if (!EJSVAL_IS_STRING(name)) - return; /* symbol props never enter a shape; nothing to flip */ - - /* find the field on the chain (leaf->root; index counts from the root) */ + /* find the chain node owning this slot (its field_count is the + 1-based insertion index) */ uint32_t s = shape; - int32_t field_index = -1; - uint8_t old_repr = EJS_SHAPE_REPR_BOXED; - while (s != EJS_SHAPE_DICT) { - EJSShape *cur = shape_get(s); - if (cur->field_count == 0) - break; - if (shape_name_eq(cur->name, name)) { - field_index = (int32_t)cur->field_count - 1; - old_repr = cur->repr; - break; - } + EJSShape *cur = shape_get(s); + while (cur->field_count != slot_index + 1) { s = cur->parent; + cur = shape_get(s); } - if (field_index < 0) - return; /* not a tracked field (e.g. index-looking key kept in the map) */ uint8_t new_repr = classify_repr(value); - if (new_repr == old_repr) - return; + if (new_repr == cur->repr) + return shape; - uint32_t flipped = shape_flip_repr(shape, (uint32_t)field_index, new_repr); - if (flipped == EJS_SHAPE_DICT) { - _ejs_shape_object_migrate(obj, EJS_SHAPE_MIGRATE_TABLE_FULL); - return; - } - EJS_OBJECT_SET_SHAPE(obj, flipped); - stat_repr_flips++; + uint32_t flipped = shape_flip_repr(shape, slot_index, new_repr); + if (flipped != EJS_SHAPE_DICT) + stat_repr_flips++; + return flipped; } void @@ -437,7 +445,7 @@ _ejs_shapes_init(void) const char *cap_env = getenv("EJS_SHAPE_CAP"); if (cap_env) { int cap = atoi(cap_env); - if (cap > 0 && cap <= 256) + if (cap > 0 && cap <= EJS_SHAPE_FIELD_CAP_MAX) shape_field_cap = (uint32_t)cap; } diff --git a/runtime/ejs-shapes.h b/runtime/ejs-shapes.h index aa4a518c..03565bc3 100644 --- a/runtime/ejs-shapes.h +++ b/runtime/ejs-shapes.h @@ -1,17 +1,19 @@ /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=4 sw=4 et tw=99 ft=cpp: * - * Runtime shape tracking (shapes-plan P4.1). + * Runtime shape tracking (shapes-plan P4.1/P4.2). * * A shape is a transition edge (parent, name, repr) appended to a parent * shape; the global table is interned and append-only, mirroring maam's * type-aware hidden classes one-for-one (repr is part of shape identity). - * In P4.1 shapes are pure bookkeeping: the property map remains the - * store, ordinary objects just carry a shape index in the widened - * GCObjectHeader, maintained on insert/delete/type-flip. Anything the + * Since P4.2 the shape IS the property structure for shaped-mode ordinary + * objects: their values live in a slot array at shape-determined indices + * (the storage engine is in ejs-object.c; this module owns the shape + * table and answers name->slot / transition queries). Anything the * shaped world can't express (deletes, non-default attributes, accessors, * symbol/index keys, cap overflow) drops the object to dictionary mode - * (shape index 0) one-way, with the reason counted for the census. + * (shape index 0) one-way — the map path — with the reason counted for + * the census. * * EJS_SHAPES=off disables tracking entirely; EJS_SHAPES_CENSUS=1 dumps * the shape census at exit. @@ -37,6 +39,17 @@ typedef enum { #define EJS_SHAPE_DICT 0 #define EJS_SHAPE_ROOT 1 +/* hard ceiling on shaped field count (and EJS_SHAPE_CAP): a full slot + array must fit the page allocator's largest cell — 128 bytes: despite + the "= 256" comment on OBJECT_SIZE_HIGH_LIMIT_BITS, `ffs(256) = 9 > 8` + sends 256-byte allocations to the LOS, whose linear per-reference + lookup makes marking quadratic on big heaps (the stage2 self-compile + went from minutes to hours before this cap). 16-byte EJSClosureEnv + header + 14 * 8-byte slots = 128. Objects with more fields drop to + dictionary mode — the pre-P4.2 map world. Revisit when the gc plan + gives the LOS an O(log n) lookup or a 256-byte size class. */ +#define EJS_SHAPE_FIELD_CAP_MAX 14 + /* the shape index lives in bits 32-55 of the 64-bit GCObjectHeader (bit 56 is the P4.2 storage-mode bit; 57-63 belong to the GC) — see the layout comment in ejs-types.h */ @@ -99,8 +112,7 @@ _ejs_shape_get(uint32_t index) [index & (EJS_SHAPE_CHUNK_SIZE - 1)]; } -/* object-side hooks; every one is a cheap no-op when tracking is off or - the object is untracked (shape index 0) */ +/* object-side hooks */ /* an ordinary object was just initialized: give it the root shape */ static inline void @@ -112,44 +124,69 @@ _ejs_shape_object_born(EJSObject *obj) _ejs_shape_stat_objects_born++; } -/* a new own data property with default attributes was inserted (the - out-of-line path: key vetting, cap check, transition-cache lookup) */ -void _ejs_shape_object_add(EJSObject *obj, ejsval name, ejsval value); +/* something un-shapeable happened: one-way drop to dictionary mode. + Only flips the header index and counts the reason — materializing the + map from slot storage is the object layer's job + (_ejs_object_to_dictionary in ejs-object.c) */ +void _ejs_shape_object_migrate(EJSObject *obj, EJSShapeMigrateReason reason); + +/* finalizer hook, census only */ +void _ejs_shape_object_died(EJSObject *obj); + +/* shape-table queries for the object layer's storage engine (P4.2). + None of these touch any object. */ + +/* number of own fields of `shape` */ +static inline uint32_t +_ejs_shape_field_count(uint32_t shape) +{ + return _ejs_shape_get(shape)->field_count; +} + +/* find string key `name` among shape's fields; on hit returns EJS_TRUE + with *slot = the field's insertion-ordered index */ +EJSBool _ejs_shape_lookup(uint32_t shape, ejsval name, uint32_t *slot); + +/* fill names[0 .. field_count) with the field names in insertion + (root->leaf) order; names must have room for field_count entries */ +void _ejs_shape_fields(uint32_t shape, ejsval *names); + +/* transition for inserting a new own data property `name` (a string, + caller-checked) with default attributes and initial value `value`. + Returns the child shape index, or EJS_SHAPE_DICT with *reason set when + the add can't stay shaped (index-looking key, field cap, table full). */ +uint32_t _ejs_shape_transition_add(uint32_t shape, ejsval name, ejsval value, + EJSShapeMigrateReason *reason); /* inline fast path for property adds: when the parent shape's transition memo matches (same name ejsval, same repr — the monomorphic construction sequence), the name was already vetted as a shapeable key when the memo's shape was interned and its field count already passed the cap, so every check collapses into one compare */ -static inline void -_ejs_shape_object_add_fast(EJSObject *obj, ejsval name, ejsval value) +static inline uint32_t +_ejs_shape_transition_add_fast(uint32_t shape, ejsval name, ejsval value, + EJSShapeMigrateReason *reason) { - uint32_t shape = EJS_OBJECT_SHAPE(obj); - if (shape == EJS_SHAPE_DICT) - return; uint32_t memo = _ejs_shape_get(shape)->last_child; if (memo != EJS_SHAPE_DICT) { EJSShape *m = _ejs_shape_get(memo); uint8_t repr = EJSVAL_IS_NUMBER(value) ? EJS_SHAPE_REPR_F64 : EJS_SHAPE_REPR_BOXED; if (EJSVAL_EQ(m->name, name) && m->repr == repr) { - EJS_OBJECT_SET_SHAPE(obj, memo); _ejs_shape_stat_transitions++; _ejs_shape_stat_fast_hits++; - return; + return memo; } } - _ejs_shape_object_add(obj, name, value); + return _ejs_shape_transition_add(shape, name, value, reason); } -/* the value of an existing own data property was updated (repr-flip check) */ -void _ejs_shape_object_set(EJSObject *obj, ejsval name, ejsval value); - -/* something un-shapeable happened: one-way drop to dictionary mode */ -void _ejs_shape_object_migrate(EJSObject *obj, EJSShapeMigrateReason reason); - -/* finalizer hook, census only */ -void _ejs_shape_object_died(EJSObject *obj); +/* transition for storing `value` into the existing field at + `slot_index`: returns `shape` when the repr is unchanged, the + repr-flipped sibling shape otherwise, or EJS_SHAPE_DICT on shape-table + overflow */ +uint32_t _ejs_shape_transition_set(uint32_t shape, uint32_t slot_index, + ejsval value); EJS_END_DECLS diff --git a/test/shapes-storm1.js b/test/shapes-storm1.js new file mode 100644 index 00000000..25179d7c --- /dev/null +++ b/test/shapes-storm1.js @@ -0,0 +1,153 @@ +// shapes-plan P4.2 stress: transition churn across every shaped-mode +// boundary — adds, repr flips, deletes, attribute/accessor migration, +// symbol and index keys, freeze/seal, enumeration order, `in` checks. + +// plain construction + repr flips +var objs = []; +for (var i = 0; i < 200; i++) { + var o = { a: i, b: "s" + i }; + o.c = i * 1.5; + o.d = i % 2 === 0 ? i : "odd" + i; // alternating repr chains + o.c = "now-a-string-" + i; // repr flip after the fact + objs.push(o); +} +var sum = 0; +for (var i = 0; i < 200; i++) { + sum += objs[i].a; + sum += objs[i].c.length; +} +console.log("sum", sum); + +// delete drops to dictionary; re-add after delete +var del = { x: 1, y: 2, z: 3 }; +delete del.y; +console.log("del keys", Object.keys(del).join(",")); +del.y = 42; +del.w = 5; +console.log("del keys2", Object.keys(del).join(","), del.y, "y" in del, "v" in del); + +// non-default attributes migrate +var attr = { p: 1, q: 2 }; +Object.defineProperty(attr, "r", { value: 3, enumerable: false }); +console.log("attr keys", Object.keys(attr).join(","), attr.r); +// (getOwnPropertyNames on all-enumerable objects only: echojs has a +// pre-existing, mode-independent bug that filters non-enumerable names) +console.log("attr names", Object.getOwnPropertyNames({ p: 1, q: 2 }).join(",")); + +// plain defineProperty with default attrs stays shaped +var dp = {}; +Object.defineProperty(dp, "k", { value: 7, writable: true, enumerable: true, configurable: true }); +dp.m = 8; +console.log("dp", dp.k, dp.m, Object.keys(dp).join(",")); + +// accessors migrate +var acc = { base: 10 }; +Object.defineProperty(acc, "twice", { + get: function () { return this.base * 2; }, + enumerable: true, + configurable: true, +}); +acc.base = 21; +console.log("acc", acc.twice, Object.keys(acc).join(",")); + +// getOwnPropertyDescriptor on a shaped object +var god = { s: "str", n: 4.25 }; +var d = Object.getOwnPropertyDescriptor(god, "n"); +console.log("desc", d.value, d.writable, d.enumerable, d.configurable, d.get === undefined); + +// index-looking keys migrate +var idx = { name: "x" }; +idx["0"] = "zero"; +idx.after = true; +console.log("idx", idx[0], idx.name, idx.after, Object.keys(idx).join(",")); + +// freeze/seal +var froz = { f: 1, g: 2 }; +Object.freeze(froz); +froz.f = 99; +froz.h = 3; +console.log("froz", froz.f, froz.h, Object.isFrozen(froz), Object.isExtensible(froz)); +var seal = { f: 1 }; +Object.seal(seal); +seal.f = 2; +delete seal.f; +console.log("seal", seal.f, Object.isSealed(seal)); + +// preventExtensions keeps existing fields writable +var pe = { a: 1 }; +Object.preventExtensions(pe); +pe.a = 2; +pe.b = 3; +console.log("pe", pe.a, pe.b, Object.isExtensible(pe)); + +// for-in order, proto chain +var proto = { inherited: "p" }; +var child = Object.create(proto); +child.own1 = 1; +child.own2 = 2; +var forin = []; +for (var k in child) forin.push(k); +console.log("forin", forin.join(",")); +console.log("hasOwn", child.hasOwnProperty("own1"), child.hasOwnProperty("inherited"), "inherited" in child); + +// Object.assign shaped -> shaped and shaped -> dict +var tgt = { t: 0 }; +var src = { u: 1, v: "two" }; +Object.assign(tgt, src); +console.log("assign", JSON.stringify(tgt)); +var dictTgt = { q: 1 }; +delete dictTgt.q; // dict mode now +Object.assign(dictTgt, { r: 2, s: 3 }); +console.log("assign2", JSON.stringify(dictTgt)); + +// defineProperties driven by a shaped descriptor object +var dst = {}; +Object.defineProperties(dst, { + one: { value: 1, enumerable: true, writable: true, configurable: true }, + two: { value: 2, enumerable: true }, +}); +console.log("defprops", dst.one, dst.two, Object.keys(dst).join(",")); + +// symbol keys migrate but stay invisible to string enumeration +var sym = Symbol("secret"); +var symObj = { visible: 1 }; +symObj[sym] = "hidden"; +symObj.visible2 = 2; +console.log("sym", symObj[sym], Object.keys(symObj).join(","), Object.getOwnPropertySymbols(symObj).length); + +// wide object crossing the slot-growth boundaries (4/8/16/32) +var wide = {}; +for (var i = 0; i < 40; i++) wide["f" + i] = i; +var wsum = 0; +for (var i = 0; i < 40; i++) wsum += wide["f" + i]; +console.log("wide", wsum, Object.keys(wide).length, wide.f0, wide.f39); + +// long-lived churn: many transitions on one object graph +var churn = {}; +for (var i = 0; i < 60; i++) { + churn["k" + i] = i; + if (i % 7 === 0) churn["k" + i] = "flip" + i; +} +console.log("churn", Object.keys(churn).length, churn.k0, churn.k7, churn.k59); + +// JSON round-trip of shaped objects +var jr = JSON.parse('{"a":1,"b":[1,2,3],"c":{"d":"e"}}'); +jr.f = jr.a + jr.b[2]; +console.log("json", JSON.stringify(jr)); + +// spread/rest-free duplicate-literal shapes share transitions +function mk(x, y) { return { x: x, y: y }; } +var pts = []; +for (var i = 0; i < 100; i++) pts.push(mk(i, i * 2)); +var psum = 0; +for (var i = 0; i < 100; i++) psum += pts[i].x + pts[i].y; +console.log("pts", psum); + +// value update through Object.defineProperty on an existing shaped field +var upd = { z: 1 }; +Object.defineProperty(upd, "z", { value: "replaced" }); +console.log("upd", upd.z, Object.keys(upd).join(",")); + +// toString / propertyIsEnumerable / valueOf via proto on shaped receivers +var pie = { e: 1 }; +console.log("pie", pie.propertyIsEnumerable("e"), pie.propertyIsEnumerable("nope"), Object.prototype.toString.call(pie)); From fd9cd3be7101fcdffdd86405f7e3bc53bf9937c8 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 13:25:04 -0700 Subject: [PATCH 108/146] eir: P4.3 shape-guarded property fast paths under --types (types-bench2 2.1x) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The shapes-plan P4.3 compiler phase — every piece guarded, trust-free: - EIR ops: has_shape (pure header compare, i1), slot_load/slot_store (imms shape/slot/repr; the ops carry the shape key so the verifier compares instead of infers); Module.shapes holds each module's interned ordered field lists. - Verifier: the effect-kill soundness inventory + computeShapeFacts, a forward must-dataflow (facts born on true edges of same-block-fresh has_shape branches, killed by every WRITE|CALL, intersected at joins, dead across unwind edges). Slot ops require an un-killed fact for their exact (value, shape); stores also prove the value's tag matches the field repr — via a dominating has_tag edge or (f64 only) a value-intrinsic number proof, mirroring what foldProvenGuards may legitimately delete. Bounds/repr checked against Module.shapes. - Runtime: _ejs_shape_intern(nfields, names, f64_mask) walks/interns ordered guard shapes at module init (the atom-table precedent); EJS_SHAPE_NOMATCH (0xFFFFFF) is reserved — never allocatable — so an unfilled or EJS_SHAPES=off shape global can never match any header. - Emitter: has_shape folds the NaN-box object check into a header-high- half compare against a per-shape i32 global (isObject/objectPointer beside isNumber in compiler.ts); slotRef is THE addressing seam (closureenv slot arrays now, gc-P5 inline slots later); interns live in their own init function called right after literal init (reusing the literal-init fn could emit past its terminator when a shape names an atom no access interned — found at the gate). - maam (submodule -> b4d52b5): receiverShapesOfNode (terminal-filtered, node-identity, fail-soft) + fieldOrderOfShape (ordered witness = first-interning insertion order; a runtime object built in another order just misses the guard — slow, never wrong). - Lowering: propGet/propSet diamonds at every atom-keyed member access (member/assign/compound/update/method-callee/destructuring). Exact facts only: monomorphic, non-megamorphic, shapeCapHits==0, single-tag reprs, ordered witness, field present — every miss a counted decline. Stores guard has_shape AND has_tag oriented by the field repr (a repr-flipping store owes a transition -> generic path). EJS_NO_SHAPE_GUARDS=1 is the compile-time bisect hook. - optimize-guards: optimizeShapeRegions — strict linear get-region matching, twin verification against Module.shapes (slot_load <-> get_prop_atom pairing, atom == field-at-slot, receiver identity, exit args slot-for-slot), the numeric merge mechanics, then fact folding (same-block-fresh compares only; a stale earlier-block compare can be false where the fact holds — pinned by attack IR). p.x + p.x = one guard, one slow path. - Telemetry: stats line grows shapeSites/shapeGuards/shapeDeclined (additive; lane scrape regex untouched); --types-dump prints a per-site census; EIR-opt line grows shape fold/merge counts. Gate: matrix green (test-eir incl. attack-IR unit tests, lowtier, stages 0-3, shapes-off A/B lane); --types diff lane 0-divergent (459 files, 458 identical, 1 N/A = tester.js; suite telemetry 13,154 sites / 809 guarded, declines counted by reason); types-shapeswrong1 routes repr-mismatched / extra-field / dictionary-mode receivers slow with node-identical output incl. EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7; types-bench2: --types 3.06s vs flag-off 6.56s (2.1x), vs 5.82s with guards failing (~1.9x from the slot fast paths). Boxed slot access only in round one; repr stays in guard identity so P4.5 flips only the emitter seam + typed-flow rules. Co-Authored-By: Claude Fable 5 --- docs/shapes-plan.md | 128 +++++-- external-deps/echojs-maam | 2 +- lib/compiler.ts | 150 +++++++- lib/eir/emit.ts | 106 ++++++ lib/eir/integrate.ts | 25 +- lib/eir/ir.ts | 27 ++ lib/eir/lower.ts | 178 +++++++++- lib/eir/ops.ts | 25 ++ lib/eir/optimize-guards.ts | 503 ++++++++++++++++++++++++++- lib/eir/optimize.ts | 15 +- lib/eir/oracle.ts | 82 +++++ lib/eir/tests.ts | 443 ++++++++++++++++++++++- lib/eir/verifier.ts | 250 ++++++++++++- lib/llvm.d.ts | 3 + lib/runtime.ts | 12 + runtime/ejs-shapes.c | 49 ++- runtime/ejs-shapes.h | 18 + test/types/README.md | 15 + test/types/types-bench2.js | 38 ++ test/types/types-shapeswrong1.js | 16 + test/types/types-shapeswrong1/lib.js | 7 + 21 files changed, 2041 insertions(+), 51 deletions(-) create mode 100644 test/types/types-bench2.js create mode 100644 test/types/types-shapeswrong1.js create mode 100644 test/types/types-shapeswrong1/lib.js diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index c9714144..d80e2c66 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -497,20 +497,100 @@ revertable, runtime phases A/B-able against the old path. instead of dual bookkeeping). Census on the storm probe: 383 born tracked, 315 shapes, 1365 transitions (48% memo fast hits), 210 repr flips, migrations correctly attributed. -- [ ] **P4.3 — Guarded fast paths under --types.** The compiler phase: - `has_shape`/`slot_load`/`slot_store` ops, verifier rules incl. the - effect-kill inventory, emitter (header-index compare; slot-array - addressing behind one seam), maam node-identity queries + - `receiverShapesOfNode`, lowering diamonds at - `get_prop_atom`/`set_prop_atom` for exact receivers, - optimize-guards shape facts + region merging, `--types-dump` shape - census. Boxed slots only in round one; `repr:"f64"` slots ride - the SAME phase only if the P3.4 machinery truly needs no changes, - else round two. - *Gate:* matrix green flag-off (lowering untouched without oracle); - --types diff lane 0-divergent; wrong-oracle probe routes slow with - identical output; EIR-shape unit tests; types-bench2 guarded delta - recorded; stats-line shape telemetry additive. +- [x] **P4.3 — Guarded fast paths under --types.** DONE 2026-07-24 + (gate results below). As built: + - **Ops** (`lib/eir/ops.ts`): `has_shape` (NONE, i1), + `slot_load` (READ) / `slot_store` (WRITE) with imms + `shape`/`slot`/`repr` — the ops carry the shape KEY too (a small + deviation from this doc's sketch) so the verifier compares + against the guard instead of inferring, and `Module.shapes` + (ir.ts) holds each module's interned field lists (`internShape`, + key = `name:repr,...` in insertion order — printed IR is + self-describing). + - **Verifier** (`verifier.ts`): the effect-kill soundness inventory + lives at the top of the file with the engine itself — + `computeShapeFacts`, a forward must-dataflow (facts born on TRUE + edges of same-block-fresh has_shape cond_brs, killed by every + WRITE|CALL, intersected at joins, dead across unwind edges). + Every slot op must sit under an un-killed fact for its exact + (value, shape); `slot_store` additionally needs a dominating + has_tag fact matching the field repr (true-edge for f64, + false-edge for boxed) OR — f64 only — a value-intrinsic number + proof (const/box_f64/mul-div-sub), because foldProvenGuards + legitimately deletes a has_tag on a proven number (found by the + wrong-oracle probe at this gate, fixed by mirroring the + optimizer's intrinsic proofs — dominance-fact folds never delete + the edge the store rule needs). Slot bounds + repr are checked + against Module.shapes. + - **Runtime** (`ejs-shapes.{h,c}`): `_ejs_shape_intern(nfields, + names, f64_mask)` walks/interns the ordered shape at module init + (the atom precedent); `EJS_SHAPE_NOMATCH` (0xFFFFFF) is reserved + (shape_alloc stops one short) so an unfilled/off-mode shape + global can never match any header — under `EJS_SHAPES=off` every + guard is false and the slow paths serve everything. + - **Emitter** (`emit.ts` + compiler.ts): has_shape folds the + NaN-box object check into the header-high-half compare against a + per-shape i32 module global (`isObject`/`objectPointer` live + beside isNumber in compiler.ts); `slotRef` is THE addressing + seam (P4.2 closureenv slot arrays today, gc-P5 inline slots + later); interns flush into the literal-init function's return + block after all atom inits (`emitShapeInterns`). + - **maam**: `receiverShapesOfNode` (terminal-filtered, node- + identity, fail-soft) + `fieldOrderOfShape` (the ordered witness = + first-interning insertion order; a runtime object built in + another order just misses the guard). `layoutOfNode`/ + `constructorReportOfNode` are P4.4 consumers and wait there. + - **Lowering** (`lower.ts` propGet/propSet): diamonds at every + atom-keyed member get/set incl. compound assign, ++/--, method + loads, and destructuring reads. Exact facts only (criterion 2): + monomorphic, non-⊤, shapeCapHits==0, all reprs single-tag, + ordered witness, field present — every miss a counted decline. + Stores guard has_shape AND has_tag oriented by the field repr + (a repr-flipping store owes a transition, so it routes generic). + `EJS_NO_SHAPE_GUARDS=1` is the compile-time bisect hook. + - **optimize-guards**: `optimizeShapeRegions` — strict linear + get-region matching, twin verification against Module.shapes + (fast slot_load ↔ slow get_prop_atom, atom==field-at-slot, + receiver identity, exit args slot-for-slot), the numeric merge's + mutation mechanics, then fact-based folding (same-block-fresh + compares only — a stale earlier-block compare can be FALSE where + the fact holds, pinned by a unit attack). Consecutive gets on + one receiver become one guard + one slow path (`p.x + p.x` ⇒ 1 + guard, 2 slot_loads). Module-toplevel receivers reload their + slot per access (distinct SSA values), so merging fires inside + functions — fine: kernels are functions; revisit with slot-load + CSE if telemetry ever says otherwise. + - **Telemetry**: stats line grows `shapeSites/shapeGuards/ + shapeDeclined=reason:n,...` (additive; the diff-lane scrape + regex untouched); `--types-dump` prints a per-site census line + (`.atom @line:col: guarded shape=... slot=N | declined reason`); + EIR-opt debug line grows shape guard/region counts. + Boxed slot ACCESS only in round one, as planned — but repr stays + part of guard identity and the imms, so P4.5 flips only the + emitter seam + typed-flow rules. + *Gate results (2026-07-24):* matrix green (test-eir + new shape + unit tests incl. hand-built attack IR for every verifier rule and + merge refusal, lowtier, stages 0-3, `//:test-stage1-shapes-off`); + --types diff lane **0-divergent** (459 files, 458 identical, 1 N/A + = tester.js standing esprima gap; suite-wide telemetry: 13,154 + sites consulted, 809 guarded, declines unmapped 7,575 / capped + 4,287 / empty 269 / no-field 194 / poly 12 / union-repr 8 — the + suite is string-heavy by design, kernels are where guards fire); + wrong-oracle probe `types-shapeswrong1` (repr-mismatched, + extra-field, and dictionary-mode receivers cross-module) routes + slow with node-identical output, incl. under EJS_SHAPES=off and + EJS_GC_EVERY_N_ALLOC=7; **types-bench2 guarded delta: 2.1×** + (--types 3.06s vs flag-off 6.56s; vs 5.82s with every guard + failing under EJS_SHAPES=off ⇒ ~1.9× attributable to the slot + fast paths, the rest to P3 arithmetic + P3.6); telemetry additive + (the lane's scrape regex untouched). Notables found at the gate: + (1) foldProvenGuards deleting a has_tag on a const stored value + exposed the verifier/optimizer proof-mismatch fixed via + provenNumberIntrinsic; (2) the shape-intern emitter originally + reused the literal-init function and could emit past its + terminator when a shape named an atom no access ever interned — + shapes now get their own init function, called right after + literal init. - [ ] **P4.4 — Born with their shape.** `make_object_shaped` for static literals (unconditional) and for fenced monomorphic constructors (structural no-escape-before-last-store check, lying-oracle unit @@ -596,12 +676,14 @@ layout change whichever lands first. ## Open questions (tracked, not blocking P4.1/P4.2) -1. **Ordered-shape witnesses from maam for constructors.** Literals - order themselves; constructor field order needs either a maam-side - first-write-order report or a compiler-side derivation from the - fenced straight-line store prefix (the fence already requires - straight-line stores, which *is* an order — likely sufficient, in - which case maam needs nothing). Decide during P4.3 design review. +1. **Ordered-shape witnesses from maam for constructors.** RESOLVED at + P4.3: maam's ShapeTable records each class's first-interning + insertion order (`fieldOrderOfShape`) — first-write program order + along the first analyzed path, for literals AND constructors alike. + A runtime object built in a different order interns a different + runtime shape and simply misses the guard (slow path, never wrong). + P4.4's born-with-shape constructors may still prefer the fence's + straight-line store prefix as the witness; decide there. 2. **Slot-array growth policy** (size classes vs exact + copy-on-transition) — informed by the P4.1 census. 3. **How much of `Array`/`Function`/module exotics join shaped mode @@ -638,10 +720,12 @@ layout change whichever lands first. the stage2 GC lesson recorded there: shaped field cap 14 keeps slot arrays out of the LOS, and the gc trigger now scales with heap footprint). -- [ ] **P4.3** EIR ops + verifier inventory + emitter + maam +- [x] **P4.3** EIR ops + verifier inventory + emitter + maam node-identity queries + guarded diamonds + shape facts in optimize-guards. Gate: matrix, lane 0-divergent, wrong-oracle - probes, unit tests, types-bench2 delta. + probes, unit tests, types-bench2 delta. DONE 2026-07-24 — see the + phased-plan entry above (types-bench2 2.1×, lane 459 files + 0-divergent, all attack IR pinned at unit level). - [ ] **P4.4** born-with-shape (literals unconditional; constructors fenced). HARD PRECONDITION: harness shapes lane. Gate: harness + lane + probes + delta. diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index dfa8eb13..b4d52b52 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit dfa8eb138dc7bd20a7537929464de19aec4081fa +Subproject commit b4d52b52280b090f69f382bb50f2cad2d658cbb6 diff --git a/lib/compiler.ts b/lib/compiler.ts index 49b43591..367e05b3 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -49,6 +49,14 @@ class LLVMIRVisitor implements VisitorSurface { ejs_globals: Record; ejs_symbols: Record; module_atoms: Map; + // shapes-plan P4.3: the module's interned guard shapes (imms.shape key + // -> the i32 shape-index global + its ordered fields), filled by the + // EIR emitter's has_shape lowering and flushed into the literal-init + // function by emitShapeInterns (the atom-table precedent) + module_shapes: Map< + string, + { global: llvm.GlobalVariable; fields: { name: string; repr: string }[] } + >; literalInitializationFunction: llvm.EjsFunction; literalInitializationDebugInfo: llvm.DISubprogram | undefined; literalInitializationBB: llvm.BasicBlock; @@ -65,6 +73,10 @@ class LLVMIRVisitor implements VisitorSurface { eir_emitter?: EIREmitter; eir_emitted?: Map>; eir_toplevel_fns!: Map; + // shapes-plan P4.3: the shape-intern init function (null when the + // module guards no shapes), built by emitShapeInterns and called by + // emitModuleResolution after literal initialization + shape_init_function: llvm.EjsFunction | null = null; constructor( module: llvm.Module, @@ -102,6 +114,7 @@ class LLVMIRVisitor implements VisitorSurface { this.ejs_symbols = runtime.createSymbolsInterface(module); this.module_atoms = new Map(); + this.module_shapes = new Map(); const init_function_name = `_ejs_module_init_string_literals_${this.filename}`; this.literalInitializationFunction = this.module.getOrInsertFunction( @@ -213,6 +226,11 @@ class LLVMIRVisitor implements VisitorSurface { "" ); + // shapes-plan P4.3: intern this module's guard shapes right after + // the atoms they name are initialized + if (this.shape_init_function) + ir.createCall(this.shape_init_function.type, this.shape_init_function, [], ""); + // fill in the information we know about this module // our name let name_slot = ir.createInBoundsGetElementPointer( @@ -647,6 +665,118 @@ class LLVMIRVisitor implements VisitorSurface { return ir.createICmpEq(trunc, consts.int32(-127), "cmpresult"); } } + + // shapes-plan P4.3 target-layout helpers (beside isNumber so all + // NaN-box knowledge stays in one place) + + // EJSVAL_IS_OBJECT: object is the topmost shifted tag, so on 64-bit a + // single unsigned compare suffices (mirrors EJSVAL_IS_OBJECT_IMPL) + isObject(val: llvm.Value): llvm.Value { + if (this.triple.pointerSize() === 64) { + return ir.createICmpUGE( + this.getEjsvalBits(val), + consts.int64_lowhi(0xfffc8000, 0x00000000), + "isobj" + ); + } else { + // 32-bit: tag compare, the isNumber trunc convention + let trunc = ir.createTrunc(this.getEjsvalBits(val), types.Int32, "trunc.i"); + return ir.createICmpEq(trunc, consts.int32(-119) /* 0xFFFFFF89 */, "isobj"); + } + } + + // EJSVAL_TO_OBJECT: payload-mask the bits and reinterpret as EJSObject*. + // Only valid under a passed isObject check. + objectPointer(val: llvm.Value): llvm.Value { + if (this.triple.pointerSize() !== 64) + throw new Error("objectPointer not implemented for 32-bit targets"); + const payload = ir.createAnd( + this.getEjsvalBits(val), + consts.int64_lowhi(0x00007fff, 0xffffffff), + "obj_payload" + ); + return ir.createIntToPtr(payload, types.EjsObject.pointerTo(), "objptr"); + } + + // the module's i32 shape-index global for `key`, minted on first use + // (initialized to EJS_SHAPE_NOMATCH so a guard can never pass before + // module init interns the real index) + moduleShapeGlobal( + key: string, + fields: { name: string; repr: string }[] + ): llvm.GlobalVariable { + let entry = this.module_shapes.get(key); + if (!entry) { + const g = new llvm.GlobalVariable( + this.module, + types.Int32, + `ejs_shape-${this.idgen()}`, + consts.int32(0xffffff) /* EJS_SHAPE_NOMATCH */, + false + ); + entry = { global: g, fields: fields.slice() }; + this.module_shapes.set(key, entry); + } + return entry.global; + } + + // flush the pending shape interns into their own init function (one + // _ejs_shape_intern call per shape), called by emitModuleResolution + // right after the literal-initialization call — so every atom the + // shapes name is initialized first. A separate function rather than + // the literal-init one: getAtom on a not-yet-interned name restores + // the builder to the END of the current block, which inside an + // already-terminated block would emit past the terminator; here the + // body block stays unterminated until the very end. Called once, + // after all EIR emission. + emitShapeInterns(): llvm.EjsFunction | null { + if (this.module_shapes.size === 0) return null; + const saved_insert = ir.getInsertBlock(); + const saved_function = this.currentFunction; + + const fname = `_ejs_module_init_shapes_${this.filename}`; + const fn = this.module.getOrInsertFunction(fname, types.Void, []); + fn.setInternalLinkage(); + this.currentFunction = fn; + const body_bb = new llvm.BasicBlock("entry", fn); + ir.setInsertPoint(body_bb); + + for (const entry of this.module_shapes.values()) { + const fields = entry.fields; + const arr_ty = llvm.ArrayType.get(types.EjsValue, fields.length); + const arr = ir.createAlloca(arr_ty, "shape_names"); + arr.setAlignment(8); + let f64_mask = 0; + for (let i = 0; i < fields.length; i++) { + if (fields[i]!.repr === "f64") f64_mask |= 1 << i; + const atom = this.getAtom(fields[i]!.name); + const gep = ir.createGetElementPointer( + arr_ty, + arr, + [consts.int32(0), consts.int64(i)], + "shape_name_slot" + ); + ir.createStore(atom, gep); + } + const base = ir.createGetElementPointer( + arr_ty, + arr, + [consts.int32(0), consts.int64(0)], + "shape_names_base" + ); + const idx = this.createCall( + this.ejs_runtime.shape_intern, + [consts.int32(fields.length), base, consts.int32(f64_mask)], + "shape_idx" + ); + ir.createStore(idx, entry.global); + } + ir.createRetVoid(); + + this.currentFunction = saved_function; + if (saved_insert) ir.setInsertPoint(saved_insert); + return fn; + } } function insert_toplevel_func(tree: e.Program, moduleInfo: JSModuleInfo): e.Program { @@ -729,7 +859,14 @@ export function compile( if (lowered.error) throw new Error(`${source_filename}: ${lowered.error}`); // Phase 3 telemetry: how many guarded diamonds lowering emitted, and // whether any oracle query missed (the node-identity canary) - if (type_oracle) + if (type_oracle) { + // shapes-plan P4.3 telemetry (criterion 5, visible degradation): + // counted decline reasons, additive-only on the scraped line + const declined = lowered.shape_declined ?? {}; + const declineStr = Object.keys(declined) + .sort() + .map((k) => `${k}:${declined[k]}`) + .join(","); console.warn( `--types: ${source_filename}: diamonds=${lowered.diamonds ?? 0} ` + `oracleQueries=${type_oracle.stats.queries} oracleUnknown=${type_oracle.stats.unknown}` + @@ -737,8 +874,14 @@ export function compile( (lowered.spec ? ` specialized=${lowered.spec.specialized} specSites=${lowered.spec.sites}` + ` specRejected=${lowered.spec.rejected}` + : "") + + // shape telemetry, present only when sites were consulted + ((lowered.shape_sites ?? 0) > 0 + ? ` shapeSites=${lowered.shape_sites} shapeGuards=${lowered.shape_guards ?? 0}` + + ` shapeDeclined=${declineStr || "none"}` : "") ); + } const toplevel_node = tree.body[0] as e.FunctionDeclaration; const toplevel_name = toplevel_node.id.name; @@ -803,6 +946,11 @@ export function compile( visitor.emitEIRToplevel(toplevel_node); + // every has_shape has been emitted by now; flush the module's shape + // interns into their init function (shapes-plan P4.3) — + // emitModuleResolution calls it after literal initialization + visitor.shape_init_function = visitor.emitShapeInterns(); + visitor.emitModuleResolution(lowered.accessors!); return module; diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 22f6f064..e6869283 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -39,6 +39,15 @@ export interface VisitorSurface { // compiler.ts so all target-layout knowledge stays in one place) unboxDouble(val: llvm.Value): llvm.Value; boxDouble(dbl: llvm.Value): llvm.Value; + // shapes-plan P4.3 (beside isNumber for the same reason): the object + // tag test, the payload->EJSObject* reinterpretation (valid only under + // a passed isObject), and the module's interned shape-index global + isObject(val: llvm.Value): llvm.Value; + objectPointer(val: llvm.Value): llvm.Value; + moduleShapeGlobal( + key: string, + fields: { name: string; repr: string }[] + ): llvm.GlobalVariable; loadBoolEjsValue(n: boolean): llvm.Value; loadDoubleEjsValue(n: number): llvm.Value; loadNullEjsValue(): llvm.Value; @@ -114,6 +123,7 @@ export class EIREmitter { module: llvm.Module; // per-module state llvm_fns!: Map; + eirModule!: EIRModule; // per-function state (reset in emitFunction) eirFn!: Func; llvmFn!: llvm.EjsFunction; @@ -137,6 +147,7 @@ export class EIREmitter { // declare + define every function in an EIR module; returns a Map of // eir function name -> llvm.Function emitModule(eirModule: EIRModule): Map { + this.eirModule = eirModule; let saved_insert = ir.getInsertBlock(); let fns = new Map(); @@ -389,6 +400,46 @@ export class EIREmitter { return this.abi.createCall(this.llvmFn, callee.type, callee, argv, name || ""); } + // shapes-plan P4.3: THE slot-addressing seam. A shaped object's + // property storage is a closureenv slot array hanging off the + // map/slots union word (P4.2 layout); when gc-P5 moves slots inline, + // only this method changes (the ops carry slot indices, not + // addresses). Only valid downstream of a passed has_shape on `objval` + // for a shape with more than `slot` fields — which the EIR verifier + // enforces — so the union word is a non-null slot-array ejsval here. + slotRef(objval: llvm.Value, slot: number): llvm.Value { + const objptr = this.v.objectPointer(objval); + // field 4 of types.EjsObject is the map/slots union word; load it + // as an ejsval (the slot-array reference) + const union_ptr = ir.createInBoundsGetElementPointer( + types.EjsObject, + objptr, + [consts.int64(0), consts.int32(4)], + "slots_union_ptr" + ); + const slots_ptr = ir.createBitCast( + union_ptr, + types.EjsValue.pointerTo(), + "slots_ejsval_ptr" + ); + const slotsval = ir.createLoad(types.EjsValue, slots_ptr, "slots_ejsval"); + // payload-mask the closureenv ejsval to its EJSClosureEnv* + const envptr = ir.createPointerCast( + this.v.objectPointer(slotsval), + types.EjsClosureEnv.pointerTo(), + "slots_env" + ); + // field 4 of types.EjsClosureEnv is the trailing slots array; the + // GEP is deliberately non-inbounds (the array is declared [1 x + // ejsval], the moduleSlotRef precedent for trailing arrays) + return ir.createGetElementPointer( + types.EjsClosureEnv, + envptr, + [consts.int64(0), consts.int32(4), consts.int64(slot)], + "slot_ref" + ); + } + // same shape as the legacy opencoded module slot access: a non-inbounds // GEP into the module global (see handleModuleSlotRef in compiler.js). // "%self" refers to the module being compiled. @@ -523,6 +574,61 @@ export class EIREmitter { this.values.set(inst, this.v.isNumber(this.val(inst.operands[0]))); return; } + + // --- shapes (shapes-plan P4.3) ------------------------------- + // has_shape folds the NaN-box object check into the header + // shape-index compare, the way isNumber backs has_tag: a + // non-object is simply false. The shape-index global holds + // EJS_SHAPE_NOMATCH until module init interns the real index + // (and forever, under EJS_SHAPES=off) — an index no object + // header can carry, so the guard is false rather than wrong. + case "has_shape": { + const key = String(inst.imms["shape"]); + const fields = this.eirModule.shapes.get(key); + if (!fields) + throw new Error(`EIR emit: has_shape names unknown module shape '${key}'`); + const g = this.v.moduleShapeGlobal(key, fields); + const val = this.val(inst.operands[0]); + + const check_bb = new llvm.BasicBlock("shape_check", this.llvmFn); + const merge_bb = new llvm.BasicBlock("shape_merge", this.llvmFn); + const from_bb = ir.getInsertBlock()!; + ir.createCondBr(this.v.isObject(val), check_bb, merge_bb); + + ir.setInsertPoint(check_bb); + const objptr = this.v.objectPointer(val); + // GCObjectHeader is two i32 halves in types.EjsObject; the + // shape index is the low 24 bits of the high half + const hdr_hi_ptr = ir.createInBoundsGetElementPointer( + types.EjsObject, + objptr, + [consts.int64(0), consts.int32(1)], + "hdr_hi_ptr" + ); + const hdr_hi = ir.createLoad(types.Int32, hdr_hi_ptr, "hdr_hi"); + const shape_idx = ir.createAnd(hdr_hi, consts.int32(0xffffff), "shape_idx"); + const want = ir.createLoad(types.Int32, g, "shape_want"); + const eq = ir.createICmpEq(shape_idx, want, "shape_eq"); + ir.createBr(merge_bb); + + ir.setInsertPoint(merge_bb); + const phi = ir.createPhi(types.Int1, 2, "has_shape"); + phi.addIncoming(eq, check_bb); + phi.addIncoming(consts.int1(0), from_bb); + this.values.set(inst, phi); + return; + } + case "slot_load": { + const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); + this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot_val")); + return; + } + case "slot_store": { + const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); + ir.createStore(this.val(inst.operands[1]), ref); + this.values.set(inst, this.val(inst.operands[1])); + return; + } case "unbox_f64": this.values.set(inst, this.v.unboxDouble(this.val(inst.operands[0]))); return; diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 7579a855..227ca23c 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -51,6 +51,10 @@ export type CollectResult = eir_module: Module; accessors: ModuleAccessor[]; diamonds: number; + // shapes-plan P4.3 telemetry (all zero/empty when --types is off) + shape_sites: number; + shape_guards: number; + shape_declined: Record; // Phase 3.6 (null when --types is off or nothing qualified) spec: SpecStats | null; error?: undefined; @@ -60,6 +64,9 @@ export type CollectResult = eir_module?: undefined; accessors?: undefined; diamonds?: undefined; + shape_sites?: undefined; + shape_guards?: undefined; + shape_declined?: undefined; spec?: undefined; }; @@ -407,13 +414,18 @@ export function collectEIRToplevel( // the toplevel environment, which a direct caller's envParam // wouldn't carry. direct calls stay a devirtualization // opportunity for the optimizer, which can prove capture shapes. - let typed_stats = { diamonds: 0, trusted: 0 }; + let typed_stats: NonNullable = { + diamonds: 0, + trusted: 0, + }; let mod_ctx = { refs: refs, this_module_info: this_module_info, module_infos: module_infos, oracle: oracle, typed_stats: typed_stats, + // --types-dump grows the per-site shape census (P4.3) + shape_dump: !!options.types_dump, }; let eir_module = new Module(filename); @@ -447,7 +459,9 @@ export function collectEIRToplevel( stats.dead_removed || stats.guards_folded || stats.regions_merged || - stats.raw_join_params + stats.raw_join_params || + stats.shape_guards_folded || + stats.shape_regions_merged ) debug.log( 1, @@ -457,7 +471,9 @@ export function collectEIRToplevel( `${stats.dead_removed} dead inst(s) removed, ` + `${stats.guards_folded} guard(s) folded, ` + `${stats.regions_merged} region(s) merged, ` + - `${stats.raw_join_params} raw f64 join param(s)` + `${stats.raw_join_params} raw f64 join param(s), ` + + `${stats.shape_guards_folded} shape guard(s) folded, ` + + `${stats.shape_regions_merged} shape region(s) merged` ); verifyModule(eir_module); @@ -507,6 +523,9 @@ export function collectEIRToplevel( eir_module: eir_module, accessors: accessors, diamonds: typed_stats.diamonds, + shape_sites: typed_stats.shape_sites ?? 0, + shape_guards: typed_stats.shape_guards ?? 0, + shape_declined: typed_stats.shape_declined ?? {}, spec: spec_stats, }; } catch (e) { diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts index 05b7192a..351b74ad 100644 --- a/lib/eir/ir.ts +++ b/lib/eir/ir.ts @@ -36,9 +36,28 @@ export interface PredEdge { targetIndex: number; } +// shapes-plan P4.3: one field of a module-interned guard shape, in +// insertion (transition-chain) order. repr mirrors the runtime's +// EJSShapeRepr and is part of shape identity. +export interface ShapeField { + name: string; + repr: "boxed" | "f64"; +} + +// the canonical Module.shapes key for a field list — also what has_shape/ +// slot_* carry in imms.shape, so printed IR is self-describing +export function shapeKeyOf(fields: readonly ShapeField[]): string { + return fields.map((f) => `${f.name}:${f.repr}`).join(","); +} + export class Module { name: string; functions: Func[] = []; + // shapes-plan P4.3: the guard shapes this module interns at init + // (imms.shape key -> ordered fields). The verifier checks slot + // bounds/reprs against this; the emitter mints one global + one + // _ejs_shape_intern call per entry (the atom-table precedent). + shapes = new Map(); constructor(name: string) { this.name = name; @@ -48,6 +67,14 @@ export class Module { this.functions.push(fn); return fn; } + + // intern a field list into the module's shape table, returning the + // imms.shape key ops should carry + internShape(fields: readonly ShapeField[]): string { + const key = shapeKeyOf(fields); + if (!this.shapes.has(key)) this.shapes.set(key, fields.slice()); + return key; + } } // Phase 3.6: a specialized clone's typed signature. `formals` types the diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index 985c0774..5990270a 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -54,9 +54,20 @@ export interface ModCtx { module_infos?: Map | null; // Phase 3: the per-module type oracle (null/absent = no typed fast // paths, today's lowering exactly) and the module-wide stats the - // lowered functions accumulate into + // lowered functions accumulate into. shapes-plan P4.3 adds the shape + // telemetry: sites = atom property accesses that consulted the oracle, + // guards = shape diamonds emitted, declined = counted reasons + // (promotion criterion 5 — visible degradation). oracle?: TypeOracle | null; - typed_stats?: { diamonds: number; trusted?: number }; + typed_stats?: { + diamonds: number; + trusted?: number; + shape_sites?: number; + shape_guards?: number; + shape_declined?: Record; + }; + // --types-dump: per-site shape census lines (shapes-plan P4.3) + shape_dump?: boolean; } // Phase 3.6: clone-lowering mode (specialize.ts). The clone gets an @@ -825,6 +836,132 @@ class LowerFunction { return result; } + // --- shapes-plan P4.3: shape-guarded property access --------------------- + // + // The promotion policy (criteria 1/2 of the plan): a diamond is emitted + // only for an EXACT receiver-shape fact — monomorphic, non-megamorphic, + // uncapped, ordered witness present, every field's repr a single tag, + // and the accessed field actually in the shape. Anything less is a + // counted decline and today's generic op. Guarded consumption is + // correct even when the oracle is wrong: the has_shape compare decides + // at runtime, and a failed guard costs speed, never behavior. + // EJS_NO_SHAPE_GUARDS=1 is the compile-time bisect hook (the + // EJS_NO_EIR_OPT mold); runtime EJS_SHAPES=off makes every guard fail. + + shapeDecline(reason: string): null { + const stats = this.mod_ctx.typed_stats; + if (stats) { + const d = (stats.shape_declined ??= {}); + d[reason] = (d[reason] ?? 0) + 1; + } + return null; + } + + // --types-dump: one census line per consulted access site + shapeDumpSite(objNode: e.Expression, atom: string, what: string): void { + if (!this.mod_ctx.shape_dump) return; + const loc = (objNode as { loc?: { start?: { line: number; column: number } } }).loc; + const where = loc && loc.start ? `${loc.start.line}:${loc.start.column + 1}` : "synthetic"; + console.warn(`--types-dump: shapes: .${atom} @${where}: ${what}`); + } + + // the exact shape fact for accessing `atom` on the value of `objNode`, + // or null (with the decline counted) when anything is short of exact + shapeFactFor( + objNode: e.Expression | null, + atom: string + ): { key: string; slot: number; repr: "boxed" | "f64" } | null { + if (!objNode || !this.oracle || !this.oracle.receiverShapeOfNode) return null; + if (process.env["EJS_NO_SHAPE_GUARDS"]) return null; + const stats = this.mod_ctx.typed_stats; + if (stats) stats.shape_sites = (stats.shape_sites ?? 0) + 1; + const q = this.oracle.receiverShapeOfNode(objNode); + if (q.declined !== undefined) { + this.shapeDumpSite(objNode, atom, `declined ${q.declined}`); + return this.shapeDecline(q.declined); + } + const slot = q.fields.findIndex((f) => f.name === atom); + if (slot < 0) { + this.shapeDumpSite(objNode, atom, "declined no-field"); + return this.shapeDecline("no-field"); // proto/method access + } + const key = this.module.internShape(q.fields); + if (stats) stats.shape_guards = (stats.shape_guards ?? 0) + 1; + this.shapeDumpSite(objNode, atom, `guarded shape="${key}" slot=${slot}`); + return { key, slot, repr: q.fields[slot]!.repr }; + } + + // obj.atom: has_shape diamond whose fast arm is a fixed-slot load and + // whose slow arm is today's generic get — the numericDiamond skeleton + // with a shape guard at the head + propGet(objNode: e.Expression | null, obj: Inst, atom: string): Inst { + const f = this.shapeFactFor(objNode, atom); + if (!f) return this.b.emit("get_prop_atom", [obj], { atom: atom }); + + const fast_bb = this.b.newBlock("shape_fast"); + const slow_bb = this.b.newBlock("shape_slow"); + const join_bb = this.b.newBlock("shape_join"); + const result = join_bb.addParam("prop"); + + const t = this.b.emit("has_shape", [obj], { shape: f.key }); + this.b.condBr(t, fast_bb, [], slow_bb, []); + this.b.sealBlock(fast_bb); + this.b.sealBlock(slow_bb); + + this.b.setInsertPoint(fast_bb); + const v = this.b.emit("slot_load", [obj], { shape: f.key, slot: f.slot, repr: f.repr }); + this.b.br(join_bb, [v]); + + this.b.setInsertPoint(slow_bb); + const g = this.b.emit("get_prop_atom", [obj], { atom: atom }); + this.b.br(join_bb, [g]); + this.b.sealBlock(join_bb); + + this.b.setInsertPoint(join_bb); + return result; + } + + // obj.atom = v: the store dual. The fast arm must prove the stored + // value's runtime repr matches the field's shape repr (a mismatched + // store owes a shape TRANSITION, which only the generic path performs), + // so the guard is has_shape AND a has_tag(number) check oriented by the + // field repr — f64 fields take numbers fast, boxed fields take + // non-numbers fast, everything else goes generic. + propSet(objNode: e.Expression | null, obj: Inst, atom: string, v: Inst): void { + const f = this.shapeFactFor(objNode, atom); + if (!f) { + this.b.emit("set_prop_atom", [obj, v], { atom: atom }); + return; + } + + const tag_bb = this.b.newBlock("shape_settag"); + const fast_bb = this.b.newBlock("shape_setfast"); + const slow_bb = this.b.newBlock("shape_setslow"); + const join_bb = this.b.newBlock("shape_setjoin"); + + const t = this.b.emit("has_shape", [obj], { shape: f.key }); + this.b.condBr(t, tag_bb, [], slow_bb, []); + this.b.sealBlock(tag_bb); + + this.b.setInsertPoint(tag_bb); + const isnum = this.b.emit("has_tag", [v], { tag: "number" }); + if (f.repr === "f64") this.b.condBr(isnum, fast_bb, [], slow_bb, []); + else this.b.condBr(isnum, slow_bb, [], fast_bb, []); + this.b.sealBlock(fast_bb); + this.b.sealBlock(slow_bb); + + this.b.setInsertPoint(fast_bb); + this.b.emit("slot_store", [obj, v], { shape: f.key, slot: f.slot, repr: f.repr }); + this.b.br(join_bb, []); + + this.b.setInsertPoint(slow_bb); + this.b.emit("set_prop_atom", [obj, v], { atom: atom }); + this.b.br(join_bb, []); + this.b.sealBlock(join_bb); + + this.b.setInsertPoint(join_bb); + } + logical(n: e.LogicalExpression): Inst { let l = this.expr(n.left); let lbool = this.b.emit("to_boolean", [l], {}); @@ -953,7 +1090,8 @@ class LowerFunction { } if (n.left.type === "MemberExpression") { // evaluate the object (and computed key) exactly once - const obj = this.expr(n.left.object as e.Expression); + const objNode = n.left.object as e.Expression; + const obj = this.expr(objNode); let atom: string | null = null; let key: Inst | null = null; if (!n.left.computed && n.left.property.type === "Identifier") @@ -963,14 +1101,14 @@ class LowerFunction { if (binop) { const cur = atom !== null - ? this.b.emit("get_prop_atom", [obj], { atom: atom }) + ? this.propGet(objNode, obj, atom) : this.b.emit("get_prop", [obj, key!], {}); const rhs = this.expr(n.right); v = this.b.emit(binop, [cur, rhs], {}); } else { v = this.expr(n.right); } - if (atom !== null) this.b.emit("set_prop_atom", [obj, v], { atom: atom }); + if (atom !== null) this.propSet(objNode, obj, atom, v); else this.b.emit("set_prop", [obj, key!, v], {}); return v; } @@ -990,18 +1128,19 @@ class LowerFunction { } if (n.argument.type === "MemberExpression") { const m = n.argument; - const obj = this.expr(m.object as e.Expression); + const objNode = m.object as e.Expression; + const obj = this.expr(objNode); let atom: string | null = null; let key: Inst | null = null; if (!m.computed && m.property.type === "Identifier") atom = m.property.name; else key = this.expr(m.property); const cur = atom !== null - ? this.b.emit("get_prop_atom", [obj], { atom: atom }) + ? this.propGet(objNode, obj, atom) : this.b.emit("get_prop", [obj, key!], {}); const old = this.b.emit("unary_plus", [cur], {}); const nv = this.b.emit(op, [old, one], {}); - if (atom !== null) this.b.emit("set_prop_atom", [obj, nv], { atom: atom }); + if (atom !== null) this.propSet(objNode, obj, atom, nv); else this.b.emit("set_prop", [obj, key!, nv], {}); return n.prefix ? nv : old; } @@ -1087,7 +1226,7 @@ class LowerFunction { if (slotv) return slotv; let obj = this.expr(n.object); if (!n.computed && n.property.type === "Identifier") - return this.b.emit("get_prop_atom", [obj], { atom: n.property.name }); + return this.propGet(n.object as e.Expression, obj, n.property.name); let key = this.expr(n.property); return this.b.emit("get_prop", [obj, key], {}); } @@ -1114,9 +1253,11 @@ class LowerFunction { } thisArg = this.expr(n.callee.object); if (!n.callee.computed && n.callee.property.type === "Identifier") - callee = this.b.emit("get_prop_atom", [thisArg], { - atom: n.callee.property.name, - }); + callee = this.propGet( + n.callee.object as e.Expression, + thisArg, + n.callee.property.name + ); else { let key = this.expr(n.callee.property); callee = this.b.emit("get_prop", [thisArg, key], {}); @@ -1587,7 +1728,7 @@ class LowerFunction { target = target.left; } const binding = this.analysis.resolve(target)!; - const v = this.b.emit("get_prop_atom", [src], { atom: keyName }); + const v = this.propGet(d.init ?? null, src, keyName); this.writeBinding(binding, v); if (dflt) { let isundef = this.b.emit("strict_eq", [v, this.b.constUndefined()], {}); @@ -1942,17 +2083,22 @@ export function lowerFunctionNode( n: e.Function, name?: string, oracle?: TypeOracle | null -): { module: Module; fn: Func; diamonds: number } { +): { module: Module; fn: Func; diamonds: number; shape_guards: number } { let analysis = new ScopeAnalysis(); let info = analysis.analyzeFunction(n, name); let module = new Module(info.name); - let typed_stats = { diamonds: 0 }; + let typed_stats: NonNullable = { diamonds: 0 }; let fn = lowerOneFunction(info, analysis, module, { refs: new Map(), oracle: oracle ?? null, typed_stats, }); - return { module: module, fn: fn, diamonds: typed_stats.diamonds }; + return { + module: module, + fn: fn, + diamonds: typed_stats.diamonds, + shape_guards: typed_stats.shape_guards ?? 0, + }; } // lower every top-level function declaration in a parsed program diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 52825b09..d90027b8 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -183,6 +183,31 @@ export const OPS = { // imms.tag: the runtime tag tested; only "number" is emitted today // (mirrors LLVMIRVisitor.isNumber, inheriting its per-target check) has_tag: { arity: 1, effects: E.NONE, imms: ["tag"], sig: { params: ["ejsval"], result: "i1" } }, + + // --- shapes (shapes-plan P4.3) ---------------------------------------------- + // i1: does the operand's header shape index equal the module-interned + // shape? imms.shape keys Module.shapes (the ordered field list the + // module interns at init, like atoms); the emitter folds the NaN-box + // object check in exactly as isNumber backs has_tag. Effect NONE — a + // pure header compare. + has_shape: { arity: 1, effects: E.NONE, imms: ["shape"], sig: { params: ["ejsval"], result: "i1" } }, + // fixed-slot access on a shape-guarded receiver. imms.shape/imms.slot + // name the guarded shape and the field index within it (the shape imm + // repeats the guard's so the verifier compares instead of infers); + // imms.repr is the FIELD's shape repr ("boxed" | "f64"). Round one is + // boxed storage access for both reprs (result/operand are ejsvals); a + // future phase (P4.5) makes repr:"f64" produce/consume raw f64 under + // the P2 typed-flow rules. The verifier requires every slot op to be + // dominated by an un-killed has_shape fact on the same value for the + // same shape (see the effect-kill inventory in verifier.ts) — without + // it a stale shape would make the slot addressing itself unsafe (the + // storage word is a MAP pointer in dictionary mode). slot_store + // additionally requires a dominating has_tag fact on the stored value + // matching the field repr, so the store provably never needs a repr + // transition (the shaped-world invariant "shape reprs describe slot + // contents" survives compiled stores). + slot_load: { arity: 1, effects: E.READ, imms: ["shape", "slot", "repr"] }, + slot_store: { arity: 2, effects: E.WRITE, imms: ["shape", "slot", "repr"] }, // a raw f64 constant (imms.value). minted only by the optimizer // (rawJoinParams' const-number edge roots) and the specialization // pass; lowering itself always emits boxed `const` numbers. diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index 576a85a6..b84dd625 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -104,9 +104,15 @@ // verifier re-checks all of it (see verifier.ts rawJoin rules). import { Func, Block, Inst } from "./ir"; -import type { Target } from "./ir"; +import type { Module, Target } from "./ir"; import { Effect, opInfo } from "./ops"; -import { computeRPO, computeDominators, dominates } from "./verifier"; +import { + computeRPO, + computeDominators, + dominates, + computeShapeFacts, + shapeFactKey, +} from "./verifier"; import type { OptStats } from "./optimize"; // generic ops that (1) lowering pairs with f64 fast ops, and (2) are @@ -1037,6 +1043,499 @@ export function threadBooleanJoins(fn: Func, stats: OptStats): boolean { return changed; } +// --- shapes-plan P4.3: shape-guard regions ------------------------------------ +// +// The shape twins of pass (a): consecutive GET diamonds on the same +// receiver and shape merge into one guard region with one slow path, and +// guards proven by an un-killed dominating shape fact fold. All facts +// come from verifier.ts's computeShapeFacts — the same engine the +// verifier re-checks the result with, so a fold or merge this pass gets +// wrong is IR the verifier rejects (trust-free, the P3.4 discipline). +// +// ---- Soundness inventory (the shape additions) ---- +// +// - Fact folding: a cond_br on has_shape(v, S) rewrites to br(true) +// when the fact (v, S) holds at the branch. Facts only enter blocks +// on guard edges and die at WRITE|CALL instructions (the effect-kill +// rule — see verifier.ts), so a held fact means the header compare +// provably answers true. Folding removes CFG edges only; a stale +// (pre-fold) fact analysis is conservative, and the fact continues to +// reach the true target THROUGH the folded block (its instructions +// are kill-free on that path, or the fact would not have held). +// - Region shape (matchShapeRegionAt): head ends in cond_br on +// has_shape(recv, S); the fast side is a LINEAR br chain whose +// instructions are effect-free-or-GC plus slot_loads on exactly +// (recv, S); the slow side is the numeric matcher's linear chain with +// get_prop_atom(recv) as the one effectful op. Anything else — a +// store diamond's has_tag split, an interior guard, a foreign edge — +// refuses the match (fail-closed). +// - Merging (tryMergeShapeAt, the numeric merge transplanted): +// region2's guard failures reroute to region1's slow entry, which +// RE-EXECUTES region1's slow chain after region1's fast side already +// ran. That is sound because (a) the fast side and j1 prefix are +// kill-free, so the receiver still has shape S there, and (b) every +// re-executed get_prop_atom names a field OF S — a get of an own +// plain data property: no getter, no proto walk, no effects, and +// bit-identical to the slot_load the fast side already did. The +// TWIN check (verifyShapeTwin) is what proves (b) plus the pairing: +// fast slot_loads and slow gets correspond op for op (atom == the +// shape's field name at that slot, receiver == recv on both sides) +// and join-exit args correspond slot for slot — both regions are +// checked, exactly like the numeric merge's symmetric twin rule. +// - Everything else (j1/j2 pred exactness, pure-prefix cloning, routing +// of j1-defined values through j2 with raw-type refusal) is the +// numeric merge's argument verbatim. + +interface ShapeRegion { + head: Block; + recv: Inst; // the guarded receiver value + shapeKey: string; // imms.shape of the head guard + fastBlocks: Set; + fastChain: Block[]; // linear br chain, entry..exit + fastLoads: Inst[]; // slot_loads in chain order + fastExitEdge: EdgeRef; + slowEntry: Block; + slowChain: Block[]; + slowSet: Set; + slowGets: Inst[]; // get_prop_atom in chain order + slowExitEdge: EdgeRef; + join: Block; +} + +// structurally verify the shape-get region headed at `head`; null on any +// deviation. Strictly linear on both sides (see the inventory above). +function matchShapeRegionAt(head: Block): ShapeRegion | null { + const term = head.terminator; + if (!term || term.op !== "cond_br") return null; + const cond = term.operands[0]!; + if (cond.op !== "has_shape") return null; + const recv = cond.operands[0]!; + const shapeKey = String(cond.imms["shape"]); + const t0 = term.targets![0]!; + const t1 = term.targets![1]!; + if (t0.args.length !== 0 || t1.args.length !== 0) return null; + const slowEntry = t1.block; + if (slowEntry.isCatch || t0.block.isCatch) return null; + if (slowEntry.params.length !== 0) return null; + if (t0.block === slowEntry) return null; + + // --- slow side: the numeric matcher's linear chain, with + // get_prop_atom(recv) as the whitelisted effectful op + const slowChain: Block[] = []; + const slowSet = new Set(); + const slowGets: Inst[] = []; + let join: Block | null = null; + let slowExitEdge: EdgeRef | null = null; + let sb = slowEntry; + for (;;) { + if (slowChain.length > MAX_REGION_BLOCKS) return null; + if (slowSet.has(sb) || sb === head) return null; + slowChain.push(sb); + slowSet.add(sb); + const bt = sb.terminator; + if (!bt) return null; + for (const inst of sb.insts) { + if (inst === bt) continue; + if (inst.targets && inst.targets.length > 0) return null; + if (inst.op === "get_prop_atom") { + if (inst.operands[0] !== recv) return null; + slowGets.push(inst); + } else if (opInfo(inst.op).effects !== Effect.NONE) { + return null; + } + } + let exit: EdgeRef; + if (bt.op === "br") { + exit = { inst: bt, targetIndex: 0 }; + } else if ( + bt.op === "get_prop_atom" && + bt.targets && + bt.targets.length === 2 && + bt.targets[0]!.kind === "normal" + ) { + // a get inside a protected region: [normal, unwind] + if (bt.operands[0] !== recv) return null; + slowGets.push(bt); + exit = { inst: bt, targetIndex: 0 }; + } else { + return null; + } + const next = exit.inst.targets![exit.targetIndex]!.block; + if (next.isCatch) return null; + if (next.predEdges.every((e) => slowSet.has(e.inst.block!))) { + sb = next; + continue; + } + join = next; + slowExitEdge = exit; + break; + } + if (!join || join.isCatch || join === head) return null; + + // --- fast side: a linear br chain of effect-free-or-GC instructions + // plus slot_loads on exactly (recv, shapeKey) + const fastBlocks = new Set(); + const fastChain: Block[] = []; + const fastLoads: Inst[] = []; + let fastExitEdge: EdgeRef | null = null; + let fb: Block | null = t0.block; + while (fb) { + if (fastBlocks.has(fb)) return null; + if (fastBlocks.size > MAX_REGION_BLOCKS) return null; + if (fb === join || fb === head || slowSet.has(fb) || fb.isCatch) return null; + fastBlocks.add(fb); + fastChain.push(fb); + const ft = fb.terminator; + if (!ft || ft.op !== "br") return null; // strictly linear + for (const inst of fb.insts) { + if (inst === ft) continue; + if (inst.targets && inst.targets.length > 0) return null; + if (inst.op === "slot_load") { + if (inst.operands[0] !== recv) return null; + if (String(inst.imms["shape"]) !== shapeKey) return null; + fastLoads.push(inst); + } else if ((opInfo(inst.op).effects & ~Effect.GC) !== 0) { + return null; + } + } + const tg: Target = ft.targets![0]!; + if (tg.block === join) { + fastExitEdge = { inst: ft, targetIndex: 0 }; + fb = null; + } else { + if (tg.args.length !== 0 && tg.block.params.length === 0) return null; + fb = tg.block; + } + } + if (!fastExitEdge) return null; + // the fast side is entered only through the head's guard + for (const b of fastBlocks) { + for (const e of b.predEdges) { + const src = e.inst.block!; + if (src !== head && !fastBlocks.has(src)) return null; + } + } + + return { + head, + recv, + shapeKey, + fastBlocks, + fastChain, + fastLoads, + fastExitEdge, + slowEntry, + slowChain, + slowSet, + slowGets, + slowExitEdge: slowExitEdge!, + join, + }; +} + +// the slow chain is the generic rendition of the fast side: slot_loads and +// gets pair op for op (atom == the shape's field at that slot), and the +// join-exit arguments correspond slot for slot. +function verifyShapeTwin(r: ShapeRegion, shapes: Map): boolean { + const fields = shapes.get(r.shapeKey); + if (!fields) return false; + if (r.fastLoads.length !== r.slowGets.length) return false; + const pair = new Map(); + for (let i = 0; i < r.fastLoads.length; i++) { + const load = r.fastLoads[i]!; + const get = r.slowGets[i]!; + const slot = load.imms["slot"] as number; + if (typeof slot !== "number" || slot < 0 || slot >= fields.length) return false; + if (fields[slot]!.name !== get.imms["atom"]) return false; + pair.set(load, get); + } + + // fast value -> the slow value it must equal at the join + const slowOf = (x: Inst, d: number): Inst | null => { + if (d <= 0) return null; + const p = pair.get(x); + if (p) return p; + if (x.op === "blockparam" && x.block && r.fastBlocks.has(x.block)) { + const b = x.block; + if (b.predEdges.length !== 1) return null; + const e = b.predEdges[0]!; + const arg = e.inst.targets![e.targetIndex]!.args[b.argIndexOfParam(x)]; + return arg ? slowOf(arg, d - 1) : null; + } + return x; // defined above the head: the same SSA value on both sides + }; + + const fastArgs = r.fastExitEdge.inst.targets![r.fastExitEdge.targetIndex]!.args; + const slowArgs = r.slowExitEdge.inst.targets![r.slowExitEdge.targetIndex]!.args; + if (fastArgs.length !== slowArgs.length) return false; + for (let i = 0; i < fastArgs.length; i++) { + const fa = fastArgs[i]; + const sa = slowArgs[i]; + if (!fa || !sa) return false; + const want = slowOf(fa, 32); + if (!want) return false; + if (want !== sa) { + // const-correspondence, the numeric merge's Object.is rule + if ( + !( + want.op === "const" && + sa.op === "const" && + want.imms["kind"] === sa.imms["kind"] && + Object.is(want.imms["value"], sa.imms["value"]) + ) + ) + return false; + } + } + return true; +} + +// merge the shape region headed at r1.join (if any) into r1. All checks +// precede all mutations — the numeric tryMergeAt transplanted. +function tryMergeShapeAt( + fn: Func, + shapes: Map, + r1: ShapeRegion, + idom: Map, + stats: OptStats +): boolean { + const j1 = r1.join; + const r2 = matchShapeRegionAt(j1); + if (!r2) return false; + if (r2.recv !== r1.recv || r2.shapeKey !== r1.shapeKey) return false; + const j2 = r2.join; + + // region2 strictly below region1 (no sharing, no cycles) + if (j2 === r1.head || j2 === j1 || r1.fastBlocks.has(j2) || r1.slowSet.has(j2)) return false; + if (r2.slowEntry === r1.slowEntry) return false; + for (const b of r2.fastBlocks) + if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + for (const b of r2.slowChain) + if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + + // j1's predecessors must be exactly region1's exits, j2's exactly + // region2's (the numeric merge's review attack A) + for (const e of j1.predEdges) { + const src = e.inst.block!; + if (!r1.fastBlocks.has(src) && !r1.slowSet.has(src)) return false; + } + for (const e of j2.predEdges) { + const src = e.inst.block!; + if (!r2.fastBlocks.has(src) && !r2.slowSet.has(src)) return false; + } + + // both regions' slow chains must be their fast sides' generic twins + if (!verifyShapeTwin(r2, shapes)) return false; + if (!verifyShapeTwin(r1, shapes)) return false; + + // j1's instruction shape: [effect-free prefix..., guard, cond_br] + const term = j1.terminator!; + const guard = term.operands[0]!; + let prefixEnd = j1.insts.length - 1; + if (guard.block === j1) { + if (j1.insts[j1.insts.length - 2] !== guard) return false; + prefixEnd = j1.insts.length - 2; + let extraUse = false; + fn.forEachInst((inst) => { + if (inst === term) return; + for (const o of inst.operands) if (o === guard) extraUse = true; + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a === guard) extraUse = true; + }); + if (extraUse) return false; + } else { + return false; // the guard must be j1's own fresh compare + } + const prefix: Inst[] = []; + for (let i = 0; i < prefixEnd; i++) { + const q = j1.insts[i]!; + if (q.targets && q.targets.length > 0) return false; + if (opInfo(q.op).effects !== Effect.NONE) return false; + prefix.push(q); + } + + // re-execution check: region2's guard failures re-run r1's slow chain + // after r1's fast side ran. Sound iff every re-executed instruction is + // effect-free or a get of an OWN field of the guarded shape (pure and + // value-identical while the receiver still has shape S — which it does: + // the fast side and prefix are kill-free by the region match). + const fields = shapes.get(r1.shapeKey)!; + for (const sb of r1.slowChain) { + for (const inst of sb.insts) { + if (inst.op === "br") continue; + if (inst.op === "get_prop_atom") { + if (inst.operands[0] !== r1.recv) return false; + if (!fields.some((f) => f.name === inst.imms["atom"])) return false; + } else if (opInfo(inst.op).effects !== Effect.NONE) { + return false; + } + } + } + + // what the slow path knows each j1-defined value to be + const slowMap = new Map(); + const exitTarget = r1.slowExitEdge.inst.targets![r1.slowExitEdge.targetIndex]!; + for (const p of j1.params) { + const arg = exitTarget.args[j1.argIndexOfParam(p)]; + if (!arg) return false; + slowMap.set(p, arg); + } + + // routing pre-check (numeric merge verbatim): every use of a + // j1-defined value outside region2 must be dominated by j2 + const routed: Inst[] = [...j1.params, ...prefix]; + const outsideUses = new Map(); + for (const v of routed) { + const outs: Inst[] = []; + let ok = true; + fn.forEachInst((inst, blk) => { + if (!ok) return; + let uses = false; + for (const o of inst.operands) if (o === v) uses = true; + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a === v) uses = true; + if (!uses) return; + if (blk === j1 || r2.fastBlocks.has(blk)) return; + if (r2.slowSet.has(blk)) return; // substituted below + if (!dominates(idom, j2, blk)) { + ok = false; + return; + } + outs.push(inst); + }); + if (!ok) return false; + if (outs.length > 0) { + if (v.type !== "any") return false; // no raw-typed routing + outsideUses.set(v, outs); + } + } + + // ---- all checks passed; mutate ---- + const mapSlow = (v: Inst): Inst => slowMap.get(v) ?? v; + + const slowExitBlock = r1.slowChain[r1.slowChain.length - 1]!; + const exitInst = r1.slowExitEdge.inst; + for (const q of prefix) { + const clone = new Inst(fn, q.op, q.operands.map(mapSlow), { ...q.imms }); + clone.block = slowExitBlock; + slowExitBlock.insts.splice(slowExitBlock.insts.indexOf(exitInst), 0, clone); + slowMap.set(q, clone); + } + + retargetEdge(exitInst, r1.slowExitEdge.targetIndex, r2.slowEntry, []); + retargetEdge(r2.head.terminator!, 1, r1.slowEntry, []); + for (const sb of r2.slowChain) { + for (const inst of sb.insts) { + for (let i = 0; i < inst.operands.length; i++) + inst.operands[i] = mapSlow(inst.operands[i]!); + if (inst.targets) + for (const t of inst.targets) + for (let i = 0; i < t.args.length; i++) + if (t.args[i]) t.args[i] = mapSlow(t.args[i]!); + } + } + + for (const entry of outsideUses.entries()) { + const v = entry[0]; + const users = entry[1]; + const vr = j2.addParam(v.nameHint); + vr.type = v.type; + const slot = j2.argIndexOfParam(vr); + for (const e of j2.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + t.args[slot] = r2.slowSet.has(e.inst.block!) ? mapSlow(v) : v; + } + for (const u of users) { + for (let i = 0; i < u.operands.length; i++) if (u.operands[i] === v) u.operands[i] = vr; + if (u.targets) + for (const t of u.targets) + for (let i = 0; i < t.args.length; i++) if (t.args[i] === v) t.args[i] = vr; + } + } + + stats.shape_regions_merged++; + return true; +} + +// fold cond_brs on has_shape guards proven by an un-killed dominating +// shape fact (post-merge, region2's guard is exactly this) +function foldProvenShapeGuards(fn: Func, stats: OptStats): boolean { + const analysis = computeShapeFacts(fn); + if (!analysis) return false; + let changed = false; + for (const b of fn.blocks) { + const term = b.terminator; + if (!term || term.op !== "cond_br") continue; + const cond = term.operands[0]!; + if (cond.op !== "has_shape") continue; + // the compare must be b's own: a fact at the BRANCH only proves a + // FRESH compare true. A has_shape computed in an earlier block can + // be stale-false (the receiver transitioned into the shape after + // it ran), and folding a stale-false branch to true would take the + // wrong arm of arbitrary (attack) IR. Same-block suffices: facts + // never appear mid-block, so fact-at-branch implies fact-at-compare. + if (cond.block !== b) continue; + const facts = analysis.factsAt(b, b.insts.length - 1); + if (!facts.has(shapeFactKey(cond.operands[0]!.id, String(cond.imms["shape"])))) continue; + // facts were computed pre-fold; folding only removes edges, so the + // stale analysis is conservative for the remaining candidates + condBrToBr(fn, b, 0); + stats.shape_guards_folded++; + changed = true; + } + if (changed) sweepUnreachableBlocks(fn); + return changed; +} + +// run shape-region merging + fact folding to a fixpoint. Cheap bail when +// the function has no shape guards (every flag-off compile). Merging +// needs the module's shape table for the twin check; without one only +// folding runs (fail-closed). +export function optimizeShapeRegions( + fn: Func, + module: Module | undefined, + stats: OptStats +): boolean { + let hasGuard = false; + for (const b of fn.blocks) { + const t = b.terminator; + if (t && t.op === "cond_br" && t.operands[0]!.op === "has_shape") { + hasGuard = true; + break; + } + } + if (!hasGuard) return false; + + sweepUnreachableBlocks(fn); + + let changedAny = false; + for (let round = 0; round < 50; round++) { + let changed = false; + if (module) { + for (let merges = 0; merges < 50; merges++) { + const { rpo } = computeRPO(fn); + const idom = computeDominators(fn, rpo); + let merged = false; + for (const b of rpo) { + const r1 = matchShapeRegionAt(b); + if (!r1) continue; + if (tryMergeShapeAt(fn, module.shapes, r1, idom, stats)) { + merged = true; + changed = true; + break; // mutations invalidate matches; re-match + } + } + if (!merged) break; + } + } + if (foldProvenShapeGuards(fn, stats)) changed = true; + if (!changed) break; + sweepUnreachableBlocks(fn); + changedAny = true; + } + return changedAny; +} + // --- driver ----------------------------------------------------------------- // run guard folding + region merging to a fixpoint. Cheap bail when the diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 54d682f8..60f76763 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -22,7 +22,12 @@ import { Func, Inst, Module, replaceAllUses } from "./ir"; import { Effect, opInfo } from "./ops"; -import { optimizeGuardRegions, rawJoinParams, threadBooleanJoins } from "./optimize-guards"; +import { + optimizeGuardRegions, + optimizeShapeRegions, + rawJoinParams, + threadBooleanJoins, +} from "./optimize-guards"; export interface OptStats { allocs_sunk: number; @@ -34,6 +39,9 @@ export interface OptStats { guards_folded: number; regions_merged: number; raw_join_params: number; + // shapes-plan P4.3: shape-guard region passes + shape_guards_folded: number; + shape_regions_merged: number; // Phase 3.6: unbox_f64(box_f64(x)) round-trips annihilated unbox_folds: number; // Phase 3.6: constant edges threaded past boxed-boolean re-tests @@ -50,6 +58,8 @@ function newStats(): OptStats { guards_folded: 0, regions_merged: 0, raw_join_params: 0, + shape_guards_folded: 0, + shape_regions_merged: 0, unbox_folds: 0, joins_threaded: 0, }; @@ -667,6 +677,9 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O // values the diamonds guard) and bail immediately when lowering // emitted no number guards — every flag-off compile. if (optimizeGuardRegions(fn, s)) eliminateDead(fn, s); + // shapes-plan P4.3: shape-guard region merging + fact folding (bails + // immediately without has_shape guards — every flag-off compile) + if (optimizeShapeRegions(fn, module, s)) eliminateDead(fn, s); if (rawJoinParams(fn, s)) eliminateDead(fn, s); // Phase 3.6 cleanups. These run AFTER the guard-region passes: the // merge machinery pattern-matches diamond fast arms (unbox of the diff --git a/lib/eir/oracle.ts b/lib/eir/oracle.ts index dbf5f1be..02c7c5a7 100644 --- a/lib/eir/oracle.ts +++ b/lib/eir/oracle.ts @@ -40,6 +40,13 @@ interface MaamMetrics { shapeCapHits?: number; } +// the slice of maam's Shape the shape queries consume (structural) +interface MaamShape { + id: number; + fields: ReadonlyArray<{ name: string; type: string }>; + megamorphic?: boolean; +} + interface MaamResult { metrics: MaamMetrics; describe(): string; @@ -47,6 +54,10 @@ interface MaamResult { // Phase 1 node-identity oracle: joined TypeSig ("num", "num|str", "⊤", …) // for the exact node object, undefined for unreached/unmapped nodes. typeOfNode(n: unknown): string | undefined; + // shapes-plan P4.3 node-identity shape queries; absent in older maam + // builds (the oracle degrades to "no shape facts", never errors) + receiverShapesOfNode?(n: unknown): MaamShape[] | undefined; + fieldOrderOfShape?(s: MaamShape): readonly string[] | undefined; } interface MaamModule { @@ -129,10 +140,40 @@ export interface EirType { tags: ReadonlySet | "top"; } +// shapes-plan P4.3: one field of a receiver's shape, in insertion order. +// repr mirrors the runtime's EJSShapeRepr: "f64" iff the field's TypeSig is +// exactly "num" (the runtime classifies stored values the same way), else +// "boxed" — and a sig whose union straddles the num/non-num line has no +// determined repr, so the whole query declines (guard identity needs every +// field's repr, not just the accessed one). +export interface OracleShapeField { + name: string; + repr: "boxed" | "f64"; +} + +export type ShapeDeclineReason = + | "unmapped" // node unknown to the analysis (or maam predates the query) + | "polymorphic" // more than one terminal shape + | "megamorphic" // the ⊤ shape + | "capped" // shapeCapHits > 0: some shape set was widened this module + | "union-repr" // a field's TypeSig straddles num/non-num + | "no-order" // no ordered witness for the shape + | "empty"; // the empty shape (nothing to access) + +export type ShapeQuery = + | { fields: OracleShapeField[]; declined?: undefined } + | { declined: ShapeDeclineReason; fields?: undefined }; + export interface TypeOracle { // type of the value an expression node evaluates to (join over all // reached contexts); "top" when unknown/unanalyzed typeOfNode(n: e.Node): EirType; + // shapes-plan P4.3: the receiver-shape fact for a property access's + // object node — exact facts only (monomorphic, non-megamorphic, + // uncapped, all reprs single-tag, ordered witness present), everything + // else a counted decline. Optional so stub oracles predating shapes + // keep working; absent = no shape facts. + receiverShapeOfNode?(n: e.Node): ShapeQuery; // required before any UNguarded consumption (guarded fast paths don't // need it) closedWorld(): boolean; @@ -178,6 +219,20 @@ export function typeSigToEirType(sig: string | undefined): EirType { return { tags }; } +// Map a maam field TypeSig to a runtime shape repr, or null when the sig +// straddles the num/non-num line (no single runtime repr exists — the +// object flips shapes at runtime and no one guard can be monomorphic). +// The runtime's classify_repr is EJSVAL_IS_NUMBER ? F64 : BOXED, so any +// union of non-num tags is uniformly BOXED. Exported for unit tests. +export function typeSigToShapeRepr(sig: string): "boxed" | "f64" | null { + if (sig === "num") return "f64"; + const parts = sig.split("|"); + for (const part of parts) { + if (part === "num" || TAG_BY_SIG[part] === undefined) return null; + } + return "boxed"; +} + // The common-ids singleton identifier nodes (ONE object each, spliced into // many sites by the desugar passes). Node-identity oracle queries on them // would be ambiguous; the dump skips them outright (maam's ambiguity poison @@ -354,6 +409,33 @@ export function runTypeAnalysisProbe( if (sig === undefined) stats.unknown++; return typeSigToEirType(sig); }, + // shapes-plan P4.3: exact receiver-shape facts, every near-miss + // a counted decline (promotion criterion 2 — no near-misses) + receiverShapeOfNode: (n): ShapeQuery => { + if (!result.receiverShapesOfNode || !result.fieldOrderOfShape) + return { declined: "unmapped" }; // older maam build + if ((m.shapeCapHits ?? 0) > 0) return { declined: "capped" }; + const shapes = result.receiverShapesOfNode(n); + if (shapes === undefined || shapes.length === 0) + return { declined: "unmapped" }; + if (shapes.length > 1) return { declined: "polymorphic" }; + const s = shapes[0]!; + if (s.megamorphic) return { declined: "megamorphic" }; + if (s.fields.length === 0) return { declined: "empty" }; + const order = result.fieldOrderOfShape(s); + if (!order || order.length !== s.fields.length) + return { declined: "no-order" }; + const typeByName = new Map(s.fields.map((f) => [f.name, f.type])); + const fields: OracleShapeField[] = []; + for (const name of order) { + const sig = typeByName.get(name); + if (sig === undefined) return { declined: "no-order" }; + const repr = typeSigToShapeRepr(sig); + if (repr === null) return { declined: "union-repr" }; + fields.push({ name, repr }); + } + return { fields }; + }, // The plan text gates closedWorld() on unknownCalls alone because it // predates the degradedBindings counter (unmodeled imports, rest // params — Chunks A/D). Both must be zero: either one means some diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 4e85907a..9e7599c3 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -18,8 +18,9 @@ import { ScopeAnalysis } from "./scopes"; import { isLowerNotSupported } from "./errors"; import { Func, Block, Inst, Module } from "./ir"; import { DesugarSpread } from "../passes/desugar-spread"; -import { typeSigToEirType } from "./oracle"; -import type { TypeOracle, TypeTag } from "./oracle"; +import { typeSigToEirType, typeSigToShapeRepr } from "./oracle"; +import type { OracleShapeField, TypeOracle, TypeTag } from "./oracle"; +import { optimizeShapeRegions } from "./optimize-guards"; import { buildArithDiamond, buildLowTierAdd, buildLowTierLt } from "./lowtier-probe"; import { DesugarClasses } from "../passes/desugar-classes"; import { DesugarDestructuring } from "../passes/desugar-destructuring"; @@ -1971,6 +1972,444 @@ test("oracle: an unrecognized constituent is top, never a guess", () => { assert(typeSigToEirType("").tags === "top"); }); +// --- shapes-plan P4.3: shape-guarded property access ---------------------------- + +test("shape-oracle: TypeSig -> repr (num=f64, non-num unions=boxed, straddles decline)", () => { + assert(typeSigToShapeRepr("num") === "f64"); + assert(typeSigToShapeRepr("str") === "boxed"); + assert(typeSigToShapeRepr("str|bool|undefined|null|obj|fn") === "boxed"); + assert(typeSigToShapeRepr("num|str") === null); + assert(typeSigToShapeRepr("⊤") === null); + assert(typeSigToShapeRepr("never") === null); + assert(typeSigToShapeRepr("num|widget") === null); +}); + +// a stub oracle with receiver-shape facts: types Identifier receivers by +// name; everything else declines as unmapped (the real oracle's fail-soft) +function stubShapeOracle( + shapes: Record, + types?: Record +): TypeOracle { + const base = stubOracle(types || {}); + return { + ...base, + receiverShapeOfNode: (n) => { + const id = n as { type?: string; name?: string }; + const fields = + id.type === "Identifier" && id.name !== undefined ? shapes[id.name] : undefined; + return fields ? { fields } : { declined: "unmapped" }; + }, + }; +} + +const PXY: OracleShapeField[] = [ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + { name: "s", repr: "boxed" }, +]; + +test("shapes: exact receiver fact lowers a get to the has_shape diamond", () => { + const { printed } = lowerWithOracle( + "function f(p) { return p.y; }", + stubShapeOracle({ p: PXY }) + ); + assertContains(printed, 'has_shape'); + assertContains(printed, 'shape="x:f64,y:f64,s:boxed"'); + assertContains(printed, 'slot_load'); + assertContains(printed, 'slot=1'); + assertContains(printed, 'repr="f64"'); + assertContains(printed, 'get_prop_atom'); // the slow arm survives + assertContains(printed, "shape_join"); +}); + +test("shapes: no shape query support means today's lowering exactly", () => { + const { printed } = lowerWithOracle( + "function f(p) { return p.y; }", + stubOracle({ p: undefined }) + ); + assertNotContains(printed, "has_shape"); + assertNotContains(printed, "slot_load"); +}); + +test("shapes: a field outside the shape declines (proto/method access)", () => { + const { printed } = lowerWithOracle( + "function f(p) { return p.z; }", + stubShapeOracle({ p: PXY }) + ); + assertNotContains(printed, "has_shape"); + assertContains(printed, 'get_prop_atom'); +}); + +test("shapes: an f64-field store guards has_shape AND has_tag, numbers fast", () => { + const { printed } = lowerWithOracle( + "function f(p, v) { p.x = v; }", + stubShapeOracle({ p: PXY }) + ); + assertContains(printed, "has_shape"); + assertContains(printed, "has_tag"); + assertContains(printed, "slot_store"); + assertContains(printed, "set_prop_atom"); + // f64 field: the tag-true edge is the fast arm + assert( + /cond_br %\d+ -> \^shape_setfast\d+\(\), \^shape_setslow\d+\(\)/.test(printed), + "expected tag-true -> fast for an f64 field" + ); +}); + +test("shapes: a boxed-field store takes non-numbers fast (swapped tag arms)", () => { + const { printed } = lowerWithOracle( + "function f(p, v) { p.s = v; }", + stubShapeOracle({ p: PXY }) + ); + assertContains(printed, 'repr="boxed"'); + // boxed field: the tag-true edge is the SLOW arm + assert( + /cond_br %\d+ -> \^shape_setslow\d+\(\), \^shape_setfast\d+\(\)/.test(printed), + "expected tag-true -> slow for a boxed field" + ); +}); + +test("shapes: EJS_NO_SHAPE_GUARDS disables the diamonds", () => { + process.env["EJS_NO_SHAPE_GUARDS"] = "1"; + try { + const { printed } = lowerWithOracle( + "function f(p) { return p.y; }", + stubShapeOracle({ p: PXY }) + ); + assertNotContains(printed, "has_shape"); + } finally { + delete process.env["EJS_NO_SHAPE_GUARDS"]; + } +}); + +// --- shapes: verifier rules (hand-built attack IR) ------------------------------- + +function assertThrows(fn: () => void, needle: string): void { + let threw: string | null = null; + try { + fn(); + } catch (e) { + threw = (e as Error).message; + } + assert(threw !== null, `expected a verifier rejection containing '${needle}'`); + assert( + threw!.includes(needle), + `expected rejection containing '${needle}', got: ${threw}` + ); +} + +interface SlotAttackOpts { + guarded?: boolean; // guard the slot op with has_shape (default true) + killInFast?: boolean; // a call between the guard and the slot op + store?: boolean; // slot_store instead of slot_load + tagGuard?: "none" | "true" | "false"; // has_tag fact for the stored value + slot?: number; + repr?: string; + shapeImm?: string; // override the op's shape imm +} + +// head: guard (or an unrelated to_boolean test) -> fast/slow -> join +function buildSlotAttack(o: SlotAttackOpts): { mod: Module; fn: Func } { + const guarded = o.guarded !== false; + const fb = new FunctionBuilder("attack", ["%env", "%this", "p", "v"]); + const p = fb.fn.entry!.params[2]!; + const v = fb.fn.entry!.params[3]!; + const shapeKey = "x:f64,y:f64"; + const opShape = o.shapeImm ?? shapeKey; + + const fast = fb.newBlock("fast"); + const slow = fb.newBlock("slow"); + const join = fb.newBlock("join"); + const res = join.addParam("res"); + const cond = guarded + ? fb.emit("has_shape", [p], { shape: shapeKey }) + : fb.emit("to_boolean", [p], {}); + fb.condBr(cond, fast, [], slow, []); + fb.sealBlock(fast); + fb.sealBlock(slow); + + fb.setInsertPoint(fast); + if (o.killInFast) fb.emit("call_runtime", [], { name: "ToString" }); + let stored = v; + if (o.store && o.tagGuard && o.tagGuard !== "none") { + // establish the tag fact: a nested has_tag diamond whose surviving + // arm continues to the store + const tagok = fb.newBlock("tagok"); + const tagbail = fb.newBlock("tagbail"); + const t = fb.emit("has_tag", [stored], { tag: "number" }); + if (o.tagGuard === "true") fb.condBr(t, tagok, [], tagbail, []); + else fb.condBr(t, tagbail, [], tagok, []); + fb.sealBlock(tagok); + fb.sealBlock(tagbail); + fb.setInsertPoint(tagbail); + fb.br(join, [fb.constUndefined()]); + fb.setInsertPoint(tagok); + } + let fastv: Inst; + if (o.store) + fastv = fb.emit("slot_store", [p, stored], { + shape: opShape, + slot: o.slot ?? 0, + repr: o.repr ?? "f64", + }); + else + fastv = fb.emit("slot_load", [p], { + shape: opShape, + slot: o.slot ?? 0, + repr: o.repr ?? "f64", + }); + fb.br(join, [fastv]); + + fb.setInsertPoint(slow); + const g = fb.emit("get_prop_atom", [p], { atom: "x" }); + fb.br(join, [g]); + + fb.sealBlock(join); + fb.setInsertPoint(join); + fb.ret(res); + + const fn = fb.finish(); + const mod = new Module("attack_mod"); + mod.addFunction(fn); + mod.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + return { mod, fn }; +} + +test("shapes-verify: a guarded slot_load in the guard's true arm verifies", () => { + const { mod } = buildSlotAttack({}); + verifyModule(mod); +}); + +test("shapes-verify: a slot op without a has_shape fact is rejected", () => { + const { mod } = buildSlotAttack({ guarded: false }); + assertThrows(() => verifyModule(mod), "un-killed has_shape fact"); +}); + +test("shapes-verify: a WRITE|CALL between guard and slot op kills the fact", () => { + const { mod } = buildSlotAttack({ killInFast: true }); + assertThrows(() => verifyModule(mod), "un-killed has_shape fact"); +}); + +test("shapes-verify: slot out of bounds / repr mismatch / unknown shape reject", () => { + assertThrows(() => verifyModule(buildSlotAttack({ slot: 2 }).mod), "out of bounds"); + assertThrows(() => verifyModule(buildSlotAttack({ repr: "boxed" }).mod), "shape field repr"); + assertThrows( + () => verifyModule(buildSlotAttack({ shapeImm: "a:boxed" }).mod), + "unknown module shape" + ); +}); + +test("shapes-verify: slot_store requires the matching has_tag fact", () => { + // no tag fact at all + assertThrows( + () => verifyModule(buildSlotAttack({ store: true, tagGuard: "none" }).mod), + "has_tag" + ); + // the right fact verifies + verifyModule(buildSlotAttack({ store: true, tagGuard: "true" }).mod); + // the WRONG edge's fact (value proven NON-number, field repr f64) rejects + assertThrows( + () => verifyModule(buildSlotAttack({ store: true, tagGuard: "false" }).mod), + "has_tag" + ); +}); + +// --- shapes: optimizer (merging + fact folding) ---------------------------------- + +function shapeOptStats(): OptStats { + return { + allocs_sunk: 0, + reads_folded: 0, + calls_inlined: 0, + iters_folded: 0, + dead_removed: 0, + guards_folded: 0, + regions_merged: 0, + raw_join_params: 0, + shape_guards_folded: 0, + shape_regions_merged: 0, + unbox_folds: 0, + joins_threaded: 0, + }; +} + +function lowerShapeOpt(src: string): { printed: string; stats: OptStats } { + const r = lowerFunctionNode(parseFn(src), undefined, stubShapeOracle({ p: PXY })); + verifyModule(r.module); + const stats = optimizeFunction(r.fn, r.module); + verifyModule(r.module); + return { printed: printFunction(r.fn), stats }; +} + +test("shapes-opt: consecutive gets on one receiver merge to one guard region", () => { + const { printed, stats } = lowerShapeOpt("function f(p) { return p.x + p.x; }"); + assert(stats.shape_regions_merged === 1, `merged=${stats.shape_regions_merged}`); + assert(stats.shape_guards_folded === 1, `folded=${stats.shape_guards_folded}`); + const guards = (printed.match(/has_shape/g) || []).length; + assert(guards === 1, `expected 1 surviving has_shape, got ${guards}`); + const loads = (printed.match(/slot_load/g) || []).length; + assert(loads === 2, `expected 2 slot_loads, got ${loads}`); +}); + +test("shapes-opt: a call between accesses kills the facts and refuses the merge", () => { + const { printed, stats } = lowerShapeOpt( + "function f(p, g) { var a = p.x; g(); return a + p.x; }" + ); + assert(stats.shape_regions_merged === 0, `merged=${stats.shape_regions_merged}`); + assert(stats.shape_guards_folded === 0, `folded=${stats.shape_guards_folded}`); + const guards = (printed.match(/has_shape/g) || []).length; + assert(guards === 2, `expected both has_shape guards to survive, got ${guards}`); +}); + +test("shapes-opt: store diamonds do not match the get-region shape", () => { + const { stats } = lowerShapeOpt("function f(p) { p.x = p.x + 1; return p.x; }"); + // the has_tag split in the store's fast side refuses region matching; + // nothing may merge across a slot_store (it is a WRITE kill) + assert(stats.shape_regions_merged === 0, `merged=${stats.shape_regions_merged}`); +}); + +// hand-built twin-mismatch attack: two adjacent get regions whose slow +// arms LIE (region2's generic get names a different field than its fast +// slot_load) — the merge must refuse on the twin check +function buildTwinAttack(lieAtom: string): { mod: Module; fn: Func; stats: OptStats } { + const fb = new FunctionBuilder("twin", ["%env", "%this", "p"]); + const p = fb.fn.entry!.params[2]!; + const shapeKey = "x:f64,y:f64"; + + const fast1 = fb.newBlock("fast1"); + const slow1 = fb.newBlock("slow1"); + const j1 = fb.newBlock("j1"); + const p1 = j1.addParam("v1"); + const g1 = fb.emit("has_shape", [p], { shape: shapeKey }); + fb.condBr(g1, fast1, [], slow1, []); + fb.sealBlock(fast1); + fb.sealBlock(slow1); + fb.setInsertPoint(fast1); + const l1 = fb.emit("slot_load", [p], { shape: shapeKey, slot: 0, repr: "f64" }); + fb.br(j1, [l1]); + fb.setInsertPoint(slow1); + const gp1 = fb.emit("get_prop_atom", [p], { atom: "x" }); + fb.br(j1, [gp1]); + fb.sealBlock(j1); + fb.setInsertPoint(j1); + + const fast2 = fb.newBlock("fast2"); + const slow2 = fb.newBlock("slow2"); + const j2 = fb.newBlock("j2"); + const p2 = j2.addParam("v2"); + const g2 = fb.emit("has_shape", [p], { shape: shapeKey }); + fb.condBr(g2, fast2, [], slow2, []); + fb.sealBlock(fast2); + fb.sealBlock(slow2); + fb.setInsertPoint(fast2); + const l2 = fb.emit("slot_load", [p], { shape: shapeKey, slot: 0, repr: "f64" }); + fb.br(j2, [l2]); + fb.setInsertPoint(slow2); + const gp2 = fb.emit("get_prop_atom", [p], { atom: lieAtom }); + fb.br(j2, [gp2]); + fb.sealBlock(j2); + fb.setInsertPoint(j2); + const sum = fb.emit("add", [p1, p2], {}); + fb.ret(sum); + + const fn = fb.finish(); + const mod = new Module("twin_mod"); + mod.addFunction(fn); + mod.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + const stats = shapeOptStats(); + optimizeShapeRegions(fn, mod, stats); + verifyModule(mod); + return { mod, fn, stats }; +} + +test("shapes-opt: a lying slow twin refuses the merge; the honest one merges", () => { + const lying = buildTwinAttack("y"); + assert(lying.stats.shape_regions_merged === 0, "lying twin must not merge"); + const honest = buildTwinAttack("x"); + assert(honest.stats.shape_regions_merged === 1, "honest twin must merge"); + assert(honest.stats.shape_guards_folded === 1, "post-merge guard must fold"); +}); + +// stale-compare attack: the fact holds at the branch, but the compare was +// computed BEFORE the region that establishes it — folding it to true +// would take the wrong arm when the compare was false at its own site +test("shapes-opt: a stale (earlier-block) has_shape compare never folds", () => { + const fb = new FunctionBuilder("stale", ["%env", "%this", "p"]); + const p = fb.fn.entry!.params[2]!; + const shapeKey = "x:f64,y:f64"; + const t1 = fb.newBlock("t1"); + const out = fb.newBlock("out"); + const a = fb.newBlock("a"); + const bb = fb.newBlock("b"); + const stale = fb.emit("has_shape", [p], { shape: shapeKey }); + const g1 = fb.emit("has_shape", [p], { shape: shapeKey }); + fb.condBr(g1, t1, [], out, []); + fb.sealBlock(t1); + fb.setInsertPoint(t1); + fb.condBr(stale, a, [], bb, []); + fb.sealBlock(a); + fb.sealBlock(bb); + fb.setInsertPoint(a); + fb.br(out, []); + fb.setInsertPoint(bb); + fb.br(out, []); + fb.sealBlock(out); + fb.setInsertPoint(out); + fb.ret(fb.constUndefined()); + + const fn = fb.finish(); + const mod = new Module("stale_mod"); + mod.addFunction(fn); + mod.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + verifyModule(mod); + const stats = shapeOptStats(); + optimizeShapeRegions(fn, mod, stats); + assert(stats.shape_guards_folded === 0, "stale compare must not fold"); + + // the same CFG with the compare minted fresh in t1 DOES fold + const fb2 = new FunctionBuilder("fresh", ["%env", "%this", "p"]); + const q = fb2.fn.entry!.params[2]!; + const t1b = fb2.newBlock("t1"); + const outb = fb2.newBlock("out"); + const ab = fb2.newBlock("a"); + const bbb = fb2.newBlock("b"); + const g = fb2.emit("has_shape", [q], { shape: shapeKey }); + fb2.condBr(g, t1b, [], outb, []); + fb2.sealBlock(t1b); + fb2.setInsertPoint(t1b); + const fresh = fb2.emit("has_shape", [q], { shape: shapeKey }); + fb2.condBr(fresh, ab, [], bbb, []); + fb2.sealBlock(ab); + fb2.sealBlock(bbb); + fb2.setInsertPoint(ab); + fb2.br(outb, []); + fb2.setInsertPoint(bbb); + fb2.br(outb, []); + fb2.sealBlock(outb); + fb2.setInsertPoint(outb); + fb2.ret(fb2.constUndefined()); + const fn2 = fb2.finish(); + const mod2 = new Module("fresh_mod"); + mod2.addFunction(fn2); + mod2.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + const stats2 = shapeOptStats(); + optimizeShapeRegions(fn2, mod2, stats2); + assert(stats2.shape_guards_folded === 1, "fresh dominated compare must fold"); + verifyModule(mod2); +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index b275c791..b55a6d18 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -12,10 +12,196 @@ // verify() throws on the first violation; the error message names the // function, block, and instruction involved. -import { opInfo, isTerminator } from "./ops"; +import { opInfo, isTerminator, Effect } from "./ops"; import { printInst } from "./printer"; import type { Func, Block, Inst, Module } from "./ir"; +// --- shape guard facts (shapes-plan P4.3) ----------------------------------- +// +// The effect-kill soundness inventory for shape facts, in one place (this +// is THE new hazard class this phase adds — see docs/shapes-plan.md): +// +// - A fact "(value v, shape S)" means: on every path to here, a +// has_shape(v, S) compare executed, answered true, and NO instruction +// that can change any object's shape has run since. Under that fact a +// slot_load/slot_store on v at S-derived indices is safe: the guard +// proved v is an ordinary shaped object whose storage word is a slot +// array with at least S.fieldcount slots (a stale fact could leave the +// storage word a dictionary-mode MAP pointer — the addressing itself +// would be wrong, not just the value). +// - Facts are born on the TRUE edge of a cond_br whose condition is a +// has_shape defined in the SAME block with no kill between its +// definition and the branch ("fresh" — a compare separated from its +// branch by a call would prove the shape held BEFORE the call, not +// after). +// - Facts die at every instruction whose effects include WRITE or CALL: +// stores can transition/migrate the receiver, calls can run arbitrary +// JS. slot_store itself is a WRITE and kills — the "same-region store +// provably doesn't transition" refinement is deliberately NOT modeled +// (fail-closed; revisit with measurements). +// - Facts never cross unwind edges (the throwing instruction may have +// been mid-block, after arbitrary kills), so catch blocks start empty. +// - Join = set intersection over incoming edges (a must-analysis). +// - SSA immutability makes the VALUE part of a fact stable; only the +// heap side (the object's header) can move, which is exactly what the +// kill rule tracks. +// +// Number-tag facts (slot_store's repr proof) need no kill rule: has_tag +// tests the VALUE's own tag, and SSA values are immutable — dominance +// alone suffices (tagFactDominates below, the guardFactAt shape from +// optimize-guards generalized to either edge). +// +// The engine is shared with optimize-guards' shape-fact folding: the +// optimizer folds on the same facts the verifier re-derives, so a fold the +// optimizer gets wrong is a fold the verifier rejects (trust-free, the +// P3.4 discipline). + +const SHAPE_KILL = Effect.WRITE | Effect.CALL; + +export function shapeFactKey(valueId: number, shape: string): string { + return `${valueId}|${shape}`; +} + +function isShapeGuard(inst: Inst): boolean { + return inst.op === "has_shape"; +} + +export interface ShapeFactAnalysis { + // facts holding at entry of each reachable block + blockIn: Map>; + // facts holding immediately before insts[uptoIndex] of `block` + factsAt(block: Block, uptoIndex: number): Set; +} + +// forward must-dataflow of shape facts over the CFG. Cheap bail: returns +// null when the function has no has_shape at all (every flag-off compile). +export function computeShapeFacts(fn: Func): ShapeFactAnalysis | null { + const universe = new Set(); + fn.forEachInst((inst) => { + if (isShapeGuard(inst)) + universe.add(shapeFactKey(inst.operands[0]!.id, String(inst.imms["shape"]))); + }); + if (universe.size === 0) return null; + + const { rpo, reachable } = computeRPO(fn); + const blockIn = new Map>(); + for (const b of rpo) blockIn.set(b, b === fn.entry ? new Set() : new Set(universe)); + + // transfer IN through the block's instructions (kills only; facts are + // born on edges, not mid-block) + const transfer = (b: Block, facts: Set, uptoIndex: number): Set => { + let out = facts; + const n = Math.min(uptoIndex, b.insts.length); + for (let i = 0; i < n; i++) { + const inst = b.insts[i]!; + if ((opInfo(inst.op).effects & SHAPE_KILL) !== 0) { + if (out.size > 0) out = new Set(); + } + } + return out; + }; + + // the fact a specific outgoing edge adds: the TRUE edge of a cond_br on + // a same-block, still-fresh has_shape + const edgeGen = (b: Block, targetIndex: number): string | null => { + const term = b.terminator; + if (!term || term.op !== "cond_br" || targetIndex !== 0) return null; + const cond = term.operands[0]!; + if (!isShapeGuard(cond) || cond.block !== b) return null; + const gi = b.insts.indexOf(cond); + if (gi < 0) return null; + for (let i = gi + 1; i < b.insts.length; i++) { + if ((opInfo(b.insts[i]!.op).effects & SHAPE_KILL) !== 0) return null; // stale + } + return shapeFactKey(cond.operands[0]!.id, String(cond.imms["shape"])); + }; + + let changed = true; + while (changed) { + changed = false; + for (const b of rpo) { + if (b === fn.entry) continue; + let acc: Set | null = null; + for (const e of b.predEdges) { + const p = e.inst.block!; + if (!reachable.has(p)) continue; + const t = e.inst.targets![e.targetIndex]!; + let out: Set; + if (t.kind === "unwind") { + out = new Set(); // mid-block unwind: no facts survive + } else { + out = new Set(transfer(p, blockIn.get(p) ?? new Set(), p.insts.length)); + const gen = edgeGen(p, e.targetIndex); + if (gen) out.add(gen); + } + if (acc === null) acc = out; + else for (const f of acc) if (!out.has(f)) acc.delete(f); + } + const next = acc ?? new Set(); + const cur = blockIn.get(b)!; + if (next.size !== cur.size || [...next].some((f) => !cur.has(f))) { + blockIn.set(b, next); + changed = true; + } + } + } + + return { + blockIn, + factsAt: (block, uptoIndex) => + transfer(block, blockIn.get(block) ?? new Set(), uptoIndex), + }; +} + +// value-intrinsic number proof: numbers by construction, no position +// involved. The optimizer's foldProvenGuards legitimately deletes a +// has_tag whose value is proven this way (const numbers, box_f64, the +// always-number generic ops — optimize-guards' soundness inventory), so +// the slot_store rule must accept the same proofs or reject valid folds. +// Deliberately the INTRINSIC subset only: the optimizer's dominance-fact +// proofs never justify deleting a guard the store rule needs (a fold on a +// dominance fact leaves that dominating guard edge in place). +export function provenNumberIntrinsic(v: Inst, depth = 6): boolean { + if (v.op === "const") return v.imms["kind"] === "number"; + if (v.op === "box_f64") return true; + if (v.op === "mul" || v.op === "div" || v.op === "sub") return true; + if (depth <= 0) return false; + if (v.op === "add") + return ( + provenNumberIntrinsic(v.operands[0]!, depth - 1) && + provenNumberIntrinsic(v.operands[1]!, depth - 1) + ); + return false; +} + +// is there a dominating (wantTrue ? true : false)-edge fact of +// `has_tag(v, "number")` at `block`? Dominance-only: number-ness of an +// immutable SSA value is position-independent (see the inventory above). +export function tagFactDominates( + v: Inst, + wantTrue: boolean, + block: Block, + idom: Map +): boolean { + let b: Block = block; + for (;;) { + if (b.predEdges.length === 1) { + const e = b.predEdges[0]!; + if ( + e.inst.op === "cond_br" && + e.targetIndex === (wantTrue ? 0 : 1) && + e.inst.operands[0]!.op === "has_tag" && + e.inst.operands[0]!.imms["tag"] === "number" && + e.inst.operands[0]!.operands[0] === v + ) + return true; + } + const n = idom.get(b); + if (!n || n === b) return false; + b = n; + } +} + export function computeRPO(fn: Func): { rpo: Block[]; reachable: Set } { const entry = fn.entry!; const visited = new Set(); @@ -346,6 +532,68 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { } } + // --- shapes-plan P4.3: shape-guarded slot access ----------------------- + // Every slot op must sit under an un-killed dominating has_shape fact on + // the same value for the same shape (see the effect-kill inventory at the + // top of this file); stores additionally prove the stored value's tag + // matches the field repr, so compiled stores never owe a transition. + // With a module in hand, imms are checked against the module shape table + // (bounds, repr identity, known key). + let shapeFacts: ShapeFactAnalysis | null | undefined; + for (const b of fn.blocks) { + if (!reachable.has(b)) continue; + b.insts.forEach((inst, i) => { + const isSlotOp = inst.op === "slot_load" || inst.op === "slot_store"; + if (!isSlotOp && inst.op !== "has_shape") return; + const shapeImm = String(inst.imms["shape"]); + const fields = mod ? mod.shapes.get(shapeImm) : undefined; + if (mod && !fields) + fail(`'${inst.op}' names unknown module shape '${shapeImm}'`, inst); + if (!isSlotOp) return; + + const slot = inst.imms["slot"]; + const repr = inst.imms["repr"]; + if (typeof slot !== "number" || slot < 0 || !Number.isInteger(slot)) + fail(`'${inst.op}' has a malformed slot immediate`, inst); + if (repr !== "boxed" && repr !== "f64") + fail(`'${inst.op}' has a malformed repr immediate`, inst); + if (fields) { + if ((slot as number) >= fields.length) + fail( + `'${inst.op}' slot ${slot} out of bounds for shape '${shapeImm}' (${fields.length} fields)`, + inst + ); + if (fields[slot as number]!.repr !== repr) + fail( + `'${inst.op}' repr "${String(repr)}" != shape field repr "${fields[slot as number]!.repr}"`, + inst + ); + } + + if (shapeFacts === undefined) shapeFacts = computeShapeFacts(fn); + const facts = shapeFacts ? shapeFacts.factsAt(b, i) : new Set(); + if (!facts.has(shapeFactKey(inst.operands[0]!.id, shapeImm))) + fail( + `'${inst.op}' is not covered by an un-killed has_shape fact for shape '${shapeImm}'`, + inst + ); + + if (inst.op === "slot_store") { + const val = inst.operands[1]!; + const proven = + repr === "f64" + ? tagFactDominates(val, true, b, idom) || provenNumberIntrinsic(val) + : tagFactDominates(val, false, b, idom); + if (!proven) + fail( + `slot_store lacks a dominating has_tag(number)=${repr === "f64"} fact ` + + `on its value for repr "${String(repr)}"`, + inst + ); + } + }); + } + return true; } diff --git a/lib/llvm.d.ts b/lib/llvm.d.ts index 87fb2065..9a911c06 100644 --- a/lib/llvm.d.ts +++ b/lib/llvm.d.ts @@ -212,8 +212,11 @@ declare module "@llvm" { createFDiv(l: Value, r: Value, name: string): Value; createFCmpOLT(l: Value, r: Value, name: string): Value; createICmpSGt(l: Value, r: Value, name: string): Value; + createICmpUGE(l: Value, r: Value, name: string): Value; createICmpUGt(l: Value, r: Value, name: string): Value; createICmpULt(l: Value, r: Value, name: string): Value; + createAnd(l: Value, r: Value, name: string): Value; + createIntToPtr(value: Value, type: Type, name: string): Value; createLandingPad(type: Type, numClauses: number, name: string): LandingPad; createLoad(type: Type, ptr: Value, name: string): Value; createNswSub(l: Value, r: Value, name: string): Value; diff --git a/lib/runtime.ts b/lib/runtime.ts index 455a5bbe..887b9542 100644 --- a/lib/runtime.ts +++ b/lib/runtime.ts @@ -389,6 +389,18 @@ const runtime_interface = { ty.EjsValue, ]); }, + // shapes-plan P4.3: module-init interning of guard shapes (names are + // this module's atoms; f64_mask bit i = field i has repr f64). + // Returns the interned shape index, or EJS_SHAPE_NOMATCH. + shape_intern: function (this: RuntimeContext) { + return does_not_throw( + this.abi.createExternalFunction(this.module, "_ejs_shape_intern", ty.Int32, [ + ty.Int32, + ty.EjsValue.pointerTo(), + ty.Int32, + ]) + ); + }, init_string_literal: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_string_init_literal", ty.Void, [ ty.String, diff --git a/runtime/ejs-shapes.c b/runtime/ejs-shapes.c index 78ca35f6..a244e1ec 100644 --- a/runtime/ejs-shapes.c +++ b/runtime/ejs-shapes.c @@ -60,11 +60,14 @@ static uint32_t stat_max_depth; #define shape_get _ejs_shape_get -/* returns the new shape's index, or EJS_SHAPE_DICT if the table is full */ +/* returns the new shape's index, or EJS_SHAPE_DICT if the table is full. + stops one short of EJS_SHAPE_NOMATCH: that index must never be + allocatable, so a compiled guard against the sentinel is statically + false (shapes-plan P4.3) */ static uint32_t shape_alloc(uint32_t parent, ejsval name, uint8_t repr, uint32_t field_count) { - if (shape_count >= SHAPE_MAX_SHAPES) + if (shape_count >= EJS_SHAPE_NOMATCH) return EJS_SHAPE_DICT; uint32_t index = shape_count++; @@ -331,6 +334,48 @@ _ejs_shape_transition_set(uint32_t shape, uint32_t slot_index, ejsval value) return flipped; } +uint32_t +_ejs_shape_intern(uint32_t nfields, const ejsval *names, uint32_t f64_mask) +{ + if (!_ejs_shapes_tracking) + return EJS_SHAPE_NOMATCH; + if (nfields == 0 || nfields > shape_field_cap || nfields > 32) + return EJS_SHAPE_NOMATCH; + + uint32_t shape = EJS_SHAPE_ROOT; + for (uint32_t i = 0; i < nfields; i++) { + ejsval name = names[i]; + if (!EJSVAL_IS_STRING(name)) + return EJS_SHAPE_NOMATCH; + + /* mirror _ejs_shape_transition_add's shapeability screen: an + index-looking key never enters the shaped world, so a shape + containing one can never match any object */ + EJSPrimString *namestr = EJSVAL_TO_STRING(name); + if (namestr->length > 0) { + jschar c0 = EJS_PRIMSTR_GET_TYPE(namestr) == EJS_STRING_FLAT + ? namestr->data.flat[0] + : _ejs_string_ucs2_at(namestr, 0); + if (c0 >= '0' && c0 <= '9') + return EJS_SHAPE_NOMATCH; + } + + /* a duplicate name would intern a corrupt chain (transition_find_ + or_add appends unconditionally; only the object layer's absent- + field discipline keeps runtime chains duplicate-free) */ + for (uint32_t j = 0; j < i; j++) + if (shape_name_eq(names[j], name)) + return EJS_SHAPE_NOMATCH; + + uint8_t repr = (f64_mask & (1u << i)) ? EJS_SHAPE_REPR_F64 + : EJS_SHAPE_REPR_BOXED; + shape = transition_find_or_add(shape, name, repr); + if (shape == EJS_SHAPE_DICT) + return EJS_SHAPE_NOMATCH; + } + return shape; +} + void _ejs_shape_object_died(EJSObject *obj) { diff --git a/runtime/ejs-shapes.h b/runtime/ejs-shapes.h index 03565bc3..4dac8516 100644 --- a/runtime/ejs-shapes.h +++ b/runtime/ejs-shapes.h @@ -39,6 +39,14 @@ typedef enum { #define EJS_SHAPE_DICT 0 #define EJS_SHAPE_ROOT 1 +/* the never-matches sentinel compiled shape guards compare against when a + module's shape could not be interned (EJS_SHAPES=off, index-looking key, + cap, table full). The table never allocates this index (shape_alloc + stops one short), so no object header can ever carry it — a guard + against it is statically false, and the guarded slow path serves every + access. shapes-plan P4.3. */ +#define EJS_SHAPE_NOMATCH 0xFFFFFFu + /* hard ceiling on shaped field count (and EJS_SHAPE_CAP): a full slot array must fit the page allocator's largest cell — 128 bytes: despite the "= 256" comment on OBJECT_SIZE_HIGH_LIMIT_BITS, `ffs(256) = 9 > 8` @@ -188,6 +196,16 @@ _ejs_shape_transition_add_fast(uint32_t shape, ejsval name, ejsval value, uint32_t _ejs_shape_transition_set(uint32_t shape, uint32_t slot_index, ejsval value); +/* module-init interning for compiled shape guards (shapes-plan P4.3, the + atom-table precedent): walk/intern the ordered shape whose fields are + names[0..nfields) with reprs from f64_mask (bit i set = field i is + EJS_SHAPE_REPR_F64), returning its index for the module's shape global. + Returns EJS_SHAPE_NOMATCH when the shape can't exist (tracking off, + index-looking key, over the field cap, table full) — guards against + NOMATCH are simply always false. */ +uint32_t _ejs_shape_intern(uint32_t nfields, const ejsval *names, + uint32_t f64_mask); + EJS_END_DECLS #endif /* _ejs_shapes_h_ */ diff --git a/test/types/README.md b/test/types/README.md index 9653ad64..3fbf20f0 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -29,6 +29,14 @@ Census as of 2026-07-22 (echojs @ 568efc7, maam @ 8d6a157): | types-spec2 | Phase 3.6 cross-function specialization (the hypot2-demo shape): hypot2 called only inside sum, prefix-safe toplevel slot stores → both clone, all four sites rewrite incl. the one inside sum$typed (`specialized=2 specSites=4`) | 7 | match | | types-specescape1 | Phase 3.6 escape rejection: f LOOKS numeric-closed but its closure is passed as a call argument → NOT specialized (no `specialized=` in stats); the escaped call feeds a string through the generic path | 2 | match | +Shapes probes (shapes-plan P4.3; `shapeGuards=N` from the stats line +counts has_shape diamonds the way `diamonds=N` counts has_tag ones): + +| probe | shape | shapeGuards | vs node | +|---|---|---|---| +| types-bench2 | the object-model microbenchmark: monomorphic constructor + p.x/p.y kernel; guarded fast paths + shape-region merging (`shapeGuards=10`, 2 shape regions merged); 2026-07-24 numbers: --types 3.06s vs flag-off 6.56s (2.1×), vs EJS_SHAPES=off 5.82s (~1.9× shapes-attributable) | 10 | match | +| types-shapeswrong1 | the wrong-oracle shape guard: lib types sumxy's receiver {x: num, y: num} from its one local call; main hands it a repr-mismatched object ("ab"), an extra-field object, and a dictionary-mode (post-delete) object → all route slow with node-identical values; the matching Point goes fast | 4 (in lib) | n/a¹ | + ¹ node cannot execute this file's bare-ESM import layout from test/; the check here is flag-off vs `--types` executables producing identical output (verified — and the slow-path routing is the probe's point). @@ -38,3 +46,10 @@ Wider context (the `--types` diff lane over all of `test/`, 2026-07-22): (tester.js, esprima parse gap), 67 diamonds total across the suite. Suite files are string/object-heavy by design — the diamond count is expected to be modest outside numeric kernels. + +P4.3 re-run (2026-07-24, shapes guards live): 459 files, 458 identical, +0 divergent, 1 N/A (tester.js), 78 diamonds. Shape telemetry across +the suite: 13,154 access sites consulted, 809 guarded; declines: +unmapped 7,575 / capped 4,287 / empty 269 / no-field 194 / +polymorphic 12 / union-repr 8 — same story: guards fire in kernels, +the string-heavy suite mostly declines (visibly, per reason). diff --git a/test/types/types-bench2.js b/test/types/types-bench2.js new file mode 100644 index 00000000..16a787cf --- /dev/null +++ b/test/types/types-bench2.js @@ -0,0 +1,38 @@ +// the shapes-plan P4.3 object-model microbenchmark kernel — the twin of +// types-bench1: allocate N points through a monomorphic constructor and +// sum p.x*p.x + p.y*p.y, so the residual wall time is property access. +// The oracle types kern's parameter (and the module-local point) with the +// single terminal shape {x: num, y: num}; every p.x / p.y lowers to a +// has_shape diamond whose fast arm is a fixed-slot load. Also serves as +// a probe: shapeGuards on the stats line counts the emitted diamonds. +function Point(x, y) { + this.x = x; + this.y = y; +} +function kern(p, n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + p.x * p.x + p.y * p.y; + i = i + 1; + } + return s; +} +function alloc(n) { + var s = 0; + var i = 0; + while (i < n) { + var p = new Point(i, i + 1); + s = s + p.x + p.y; + i = i + 1; + } + return s; +} +var out = 0; +var r = 0; +while (r < 20) { + out = out + kern(new Point(3, 4), 1000000); + out = out + alloc(200000); + r = r + 1; +} +console.log(out); diff --git a/test/types/types-shapeswrong1.js b/test/types/types-shapeswrong1.js new file mode 100644 index 00000000..9fc455dc --- /dev/null +++ b/test/types/types-shapeswrong1.js @@ -0,0 +1,16 @@ +// the wrong-oracle shape guard (shapes-plan P4.3): lib.js's oracle typed +// sumxy's receiver with the terminal shape {x: num, y: num} from its only +// module-local call, but cross-module we hand it (a) a string-valued +// object with different reprs, (b) an object with extra fields, (c) a +// dictionary-mode object (post-delete), and (d) the shape-matching case. +// Every access must route through the guard (fast only when the runtime +// shape matches) with node-identical output — correctness never depends +// on the oracle being right. +import { sumxy, mk } from "./types-shapeswrong1/lib"; +console.log(sumxy({ x: "a", y: "b" })); // repr mismatch: slow, "ab" +var wide = { x: 10, y: 20, z: 30 }; +console.log(sumxy(wide)); // extra field: guard fails, 30 +var del = { x: 100, y: 200 }; +delete del.x; del.x = 7; // dictionary mode: guard fails +console.log(sumxy(del)); +console.log(sumxy(mk(3, 4))); // the matching shape: fast, 7 diff --git a/test/types/types-shapeswrong1/lib.js b/test/types/types-shapeswrong1/lib.js new file mode 100644 index 00000000..01621f06 --- /dev/null +++ b/test/types/types-shapeswrong1/lib.js @@ -0,0 +1,7 @@ +// the oracle here sees ONE terminal shape for sumxy's receiver — the +// module-local Point instances {x: num, y: num} — so p.x / p.y lower to +// has_shape diamonds against that shape. +function Point(x, y) { this.x = x; this.y = y; } +export function sumxy(p) { return p.x + p.y; } +export function mk(x, y) { return new Point(x, y); } +console.log(sumxy(mk(1, 2))); // the call that types the receiver From 2b84ef68df88cd0b001cbfddbb496dea0373793b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 15:42:31 -0700 Subject: [PATCH 109/146] eir: P4.4 born-with-shape under --types (types-bench2 3.3x total) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Shapes-plan P4.4 — objects born with their shape, in two forms: - Statically-keyed object literals lower to make_object_shaped (operands = values in key order, imms.shape = the interned ordered field list). Computed keys, accessors, __proto__:, duplicates, index-looking keys, and >cap counts keep today's lowering. - Constructors are a body-side FILL, not an allocation: the runtime's construct path allocates `this` before the body runs, so the straight-line this-store prefix batches into a diamond guarded by has_shape(this, "") — the EMPTY shape (interning zero fields now returns EJS_SHAPE_ROOT) — with fill_object_shaped in the fast arm and the original sequential set_prop_atom run in the slow arm. The one-compare guard makes correctness oracle-INDEPENDENT (the planned maam constructorReportOfNode query turned out unnecessary); the structural fence (plain non-arrow fn; values are Literals or resolved-local Identifiers, so nothing can observe the receiver mid-batch; distinct non-index names; count in [2, cap]) cuts on `in`, call-valued stores, escapes — declines counted per reason. Runtime: _ejs_object_new_shaped/_ejs_object_fill_shaped(argc, names[], values[]) re-derive the TRUE shape from the actual values through the transition memo (~one compare per field when monomorphic) — a wrong static repr can never mint a lying shape — and fall back to the sequential _ejs_object_setprop loop byte-for-byte off-script: EJS_SHAPES=off, non-empty/dictionary/non-extensible receivers, and shaped_proto_intercepts (a proto-chain accessor or non-writable data property owes [[Set]] semantics; shaped-mode protos can't carry either, so only dictionary-mode protos probe their maps). Verifier: born ops check operand count against the shape; fill requires an un-killed EMPTY-shape fact on its receiver through the same computeShapeFacts engine as slot ops. Attack-IR pins: unguarded fill, killed fact, full-shape (non-empty) guard, wrong arity. Found at the gate, pre-existing since P4.3: provenNumberAt (optimizer) proves const-number joins (c ? 1 : 0) and folds the has_tag over one, but the verifier's provenNumberIntrinsic had no blockparam case, so the uncovered slot_store rejected a VALID optimized module (compile failure; exposed by types-bornshapewrong1's ternary-valued ctor store). provenNumberIntrinsic now mirrors the blockparam proof, pinned in both directions. Telemetry: bornShaped/ctorFills/fenceDeclined on the --types stats line (additive); EJS_NO_BORN_SHAPED is the bisect hook. HARD PRECONDITION delivered first — the differential harness shapes lane (maam submodule @d8610d3): per-allocation-site shape containment (concrete hidden classes need abstract witnesses; 350 checks, 0 violations) + shapes-obs-* observable probes (Object.keys order, in during construction, delete-readd, freeze/seal, accessor conversion) run node-vs-ejs with BOTH default and --types compiles, all green against this compiler. Gate: matrix x7 green; --types diff lane 459 files / 458 identical / 0 divergent (suite-wide bornShaped=417 ctorFills=9); probes types-bornshape1 + types-bornshapewrong1 node-identical (guard-fail reuse, frozen receivers, proto-setter interception, non-writable proto swallowing); types-bench2 3.06s -> 2.03s (flag-off 6.76s => 3.3x total; the new 1.5x step is the allocation batching). Co-Authored-By: Claude Fable 5 --- .gitignore | 3 + docs/shapes-plan.md | 96 ++++++++-- external-deps/echojs-maam | 2 +- lib/compiler.ts | 10 + lib/eir/emit.ts | 39 ++++ lib/eir/integrate.ts | 10 + lib/eir/lower.ts | 166 ++++++++++++++++- lib/eir/ops.ts | 16 ++ lib/eir/tests.ts | 271 ++++++++++++++++++++++++++++ lib/eir/verifier.ts | 54 +++++- lib/runtime.ts | 17 ++ runtime/ejs-object.c | 91 ++++++++++ runtime/ejs-object.h | 9 + runtime/ejs-shapes.c | 7 +- test/types/README.md | 4 +- test/types/types-bornshape1.js | 21 +++ test/types/types-bornshapewrong1.js | 43 +++++ 17 files changed, 842 insertions(+), 17 deletions(-) create mode 100644 test/types/types-bornshape1.js create mode 100644 test/types/types-bornshapewrong1.js diff --git a/.gitignore b/.gitignore index 08cb452e..d4465d25 100644 --- a/.gitignore +++ b/.gitignore @@ -23,3 +23,6 @@ echojs-*.tar.gz node_modules/ .stamp-* + +# assembled stage0-style work trees (maam diff harness / --types diff lane) +maam-difftree/ diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index d80e2c66..626667c5 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -591,15 +591,86 @@ revertable, runtime phases A/B-able against the old path. terminator when a shape named an atom no access ever interned — shapes now get their own init function, called right after literal init. -- [ ] **P4.4 — Born with their shape.** `make_object_shaped` for static - literals (unconditional) and for fenced monomorphic constructors - (structural no-escape-before-last-store check, lying-oracle unit - pins); `_ejs_object_new_shaped`; initializing slot stores. - HARD PRECONDITION: the differential harness shapes lane is green - (the P3.5→P3.6 sequencing, replayed). - *Gate:* harness shapes lane green incl. `in`-during-construction - probes; diff lane 0-divergent; types-bench2 allocation delta - recorded; declined-fence telemetry visible. +- [x] **P4.4 — Born with their shape.** DONE 2026-07-24. + PRECONDITION FIRST: the differential harness grew its shapes lane + (maam submodule @d8610d3) — (a) per-allocation-site shape + containment in the analysis worker (every concrete hidden class + needs an abstract witness at its site: ⊤, or same field-name set + with pointwise ⊒ field types; order-insensitive interning on both + sides makes write order a non-issue; 350 witness checks across 2 + abstract configs, 0 violations), and (b) `shapes-obs-*.js` + observable probes run node+ejs ONLY (maam models `delete` as a + no-op and doesn't model Object.keys/freeze/defineProperty): + Object.keys order, `in` during construction, delete-then-readd, + freeze/seal, accessor conversion — each compiled BOTH default and + `--types`, both byte-matching node. Gated + vacuous-pass-guarded. + IMPLEMENTATION (design settled here, deviating from the sketch + above where the runtime's construct path forced it): + - **Literals**: statically-keyed literals lower to + `make_object_shaped` (operands = values in key order, imms.shape + = the interned ordered field list; static reprs from + operandIsNumber). Computed keys, accessors, `__proto__:`, + duplicate keys, index-looking keys, and >cap field counts keep + today's lowering. + - **Constructors are a body-side FILL, not an allocation**: the + runtime's construct path allocates `this` before the body runs, + so the batched prefix lowers to a diamond guarded by + `has_shape(this, "")` — the EMPTY shape (one compare; interning + zero fields now returns EJS_SHAPE_ROOT) — whose fast arm is + `fill_object_shaped [this, values...]` and whose slow arm is the + original sequential set_prop_atom run. The guard makes + correctness oracle-INDEPENDENT (no maam constructor query is + needed at all — constructorReportOfNode never got built); + monomorphism affects only speed. The structural fence + (oracle-free, unit-pinned): plain non-arrow function, prefix = + maximal leading run of `this. = ` statements (effect-free values ⇒ nothing can + observe the receiver mid-batch), distinct non-index names, count + in [2, cap]. `in` mid-prefix, call-valued stores, escaping + receivers, computed keys all CUT the prefix (fence_declined + counted by reason). + - **The runtime re-derives the true shape from the ACTUAL values** + (`_ejs_object_new_shaped` / `_ejs_object_fill_shaped` in + ejs-object.c take argc + names[] + values[] and walk the + transition memo, ~one compare per field when monomorphic) — a + wrong static repr can never mint a lying shape. Off-script + cases fall back to today's sequential `_ejs_object_setprop` + loop byte-for-byte: EJS_SHAPES=off, non-empty/dictionary/ + non-extensible receivers, index keys, cap — and + `shaped_proto_intercepts`: a proto-chain ACCESSOR or + non-writable data property must run assignment ([[Set]]) + semantics, so the batch declines (shaped-mode protos can't + carry either, so only dictionary-mode protos probe their maps). + - **Verifier**: operand count == shape field count (+receiver for + fill); fill requires an un-killed EMPTY-shape fact on its + receiver through the same computeShapeFacts engine as slot ops + (attack IR pins: unguarded, killed-fact, wrong-shape guard, + wrong arity). The optimizer's region/fold machinery structurally + ignores the new ops (WRITE effects fail its purity screens). + - `EJS_NO_BORN_SHAPED` is the bisect hook; telemetry: + `bornShaped=N ctorFills=N fenceDeclined=reason:n,...` + (additive). + FOUND AT THE GATE: a pre-existing P4.3 proof-strength mismatch — + optimize-guards' provenNumberAt proves const-number JOINS + (`c ? 1 : 0`) and folds the has_tag over one, but the verifier's + provenNumberIntrinsic didn't accept blockparams, so the uncovered + slot_store rejected a VALID optimized module (compile failure, not + a miscompile; exposed by types-bornshapewrong1's ternary-valued + ctor store, pinned by born-verify unit tests both directions). + provenNumberIntrinsic now mirrors the blockparam case. + *Gate results (2026-07-24):* harness shapes lane green (see + above) incl. the `in`-during-construction probe under `--types`; + probes types-bornshape1 / types-bornshapewrong1 node-identical + (the latter exercises guard-fail reuse, frozen receivers, + proto-setter interception, non-writable proto swallowing — + `bornShaped=3 ctorFills=3 fenceDeclined=short-prefix:1`); full + matrix ×7 green; --types diff lane 0-divergent (459 files, 458 + identical, 1 N/A tester.js; suite-wide **bornShaped=417 + ctorFills=9**, fence declines all short-prefix/value-not-local — + visible); **types-bench2 3.06s → 2.03s** (--types, median of 3; + flag-off 6.76s ⇒ **3.3×** total, the new 1.5× step being the + allocation batching: `ctorFills=1` covers the ctor in both the + kern and alloc loops). - [ ] **P4.5 — Typed slots × specialization × GC.** `repr:"f64"` slots unboxed end-to-end inside guard regions and P3.6 clones (shape facts feeding the raw-value machinery); clone-internal unguarded @@ -726,9 +797,12 @@ layout change whichever lands first. probes, unit tests, types-bench2 delta. DONE 2026-07-24 — see the phased-plan entry above (types-bench2 2.1×, lane 459 files 0-divergent, all attack IR pinned at unit level). -- [ ] **P4.4** born-with-shape (literals unconditional; constructors +- [x] **P4.4** born-with-shape (literals unconditional; constructors fenced). HARD PRECONDITION: harness shapes lane. Gate: harness + - lane + probes + delta. + lane + probes + delta. DONE 2026-07-24 — see the phased-plan + entry (harness shapes lane green, types-bench2 3.06s → 2.03s, + ctor batching = the empty-shape-guarded body-side fill; no maam + constructor query needed). - [ ] **P4.5** typed slots × clones × gc-P5 consumption. Gate: typed delta, all lanes green. - [ ] **P4.6** measured extensions (poly guards, accessor inlining, diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index b4d52b52..d8610d3f 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit b4d52b52280b090f69f382bb50f2cad2d658cbb6 +Subproject commit d8610d3f025f1a3dfef29bf9c73724c3f6c5ff83 diff --git a/lib/compiler.ts b/lib/compiler.ts index 367e05b3..846ba724 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -879,6 +879,16 @@ export function compile( ((lowered.shape_sites ?? 0) > 0 ? ` shapeSites=${lowered.shape_sites} shapeGuards=${lowered.shape_guards ?? 0}` + ` shapeDeclined=${declineStr || "none"}` + : "") + + // shapes-plan P4.4: born-with-shape telemetry (additive) + ((lowered.born_shaped ?? 0) > 0 || (lowered.ctor_fills ?? 0) > 0 + ? ` bornShaped=${lowered.born_shaped ?? 0} ctorFills=${lowered.ctor_fills ?? 0}` + : "") + + (Object.keys(lowered.fence_declined ?? {}).length > 0 + ? ` fenceDeclined=${Object.keys(lowered.fence_declined!) + .sort() + .map((k) => `${k}:${lowered.fence_declined![k]}`) + .join(",")}` : "") ); } diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index e6869283..2c3f3585 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -371,6 +371,11 @@ export class EIREmitter { max = Math.max(max, 1); else if (inst.op === "make_array" || inst.op === "array_from_spread") max = Math.max(max, inst.operands.length); + // names + values, spilled contiguously (see the emit case) + else if (inst.op === "make_object_shaped") + max = Math.max(max, inst.operands.length * 2); + else if (inst.op === "fill_object_shaped") + max = Math.max(max, (inst.operands.length - 1) * 2); else if (inst.op === "template_callsite") max = Math.max( max, @@ -629,6 +634,40 @@ export class EIREmitter { this.values.set(inst, this.val(inst.operands[1])); return; } + // born with their shape (shapes-plan P4.4): spill the field + // names (atom loads) and initial values contiguously into the + // scratch area — names at [0..n), values at [n..2n) — and make + // one runtime call. The runtime re-derives the true shape from + // the actual values and falls back to sequential generic sets + // whenever the shaped fast path doesn't apply, so no shape + // global is consulted here (unlike has_shape). + case "make_object_shaped": + case "fill_object_shaped": { + const key = String(inst.imms["shape"]); + const fields = this.eirModule.shapes.get(key); + if (!fields) + throw new Error(`EIR emit: ${inst.op} names unknown module shape '${key}'`); + const isFill = inst.op === "fill_object_shaped"; + const vals = inst.operands.slice(isFill ? 1 : 0).map((o) => this.val(o)); + const names = fields.map((f) => this.v.getAtom(f.name)); + const base = this.spillArgs([...names, ...vals]); + const vbase = ir.createGetElementPointer( + this.scratch_type!, + this.scratch!, + [consts.int32(0), consts.int64(fields.length)], + "shaped_vals" + ); + const argv = isFill + ? [this.val(inst.operands[0]), consts.int32(fields.length), base, vbase] + : [consts.int32(fields.length), base, vbase]; + this.emitCallLike( + inst, + isFill ? rt.object_fill_shaped : rt.object_new_shaped, + argv, + isFill ? "fillshaped" : "newshaped" + ); + return; + } case "unbox_f64": this.values.set(inst, this.v.unboxDouble(this.val(inst.operands[0]))); return; diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 227ca23c..e2ecfe19 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -55,6 +55,10 @@ export type CollectResult = shape_sites: number; shape_guards: number; shape_declined: Record; + // shapes-plan P4.4: born-with-shape telemetry + born_shaped: number; + ctor_fills: number; + fence_declined: Record; // Phase 3.6 (null when --types is off or nothing qualified) spec: SpecStats | null; error?: undefined; @@ -67,6 +71,9 @@ export type CollectResult = shape_sites?: undefined; shape_guards?: undefined; shape_declined?: undefined; + born_shaped?: undefined; + ctor_fills?: undefined; + fence_declined?: undefined; spec?: undefined; }; @@ -526,6 +533,9 @@ export function collectEIRToplevel( shape_sites: typed_stats.shape_sites ?? 0, shape_guards: typed_stats.shape_guards ?? 0, shape_declined: typed_stats.shape_declined ?? {}, + born_shaped: typed_stats.born_shaped ?? 0, + ctor_fills: typed_stats.ctor_fills ?? 0, + fence_declined: typed_stats.fence_declined ?? {}, spec: spec_stats, }; } catch (e) { diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index 5990270a..16dfec28 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -16,6 +16,7 @@ import { FunctionBuilder } from "./builder"; import { Module, Func, Block, Inst } from "./ir"; +import type { ShapeField } from "./ir"; import { ScopeAnalysis, compound_assign_ops, Binding, FnInfo, LoopEnv } from "./scopes"; import { LowerNotSupported } from "./errors"; import { eir_intrinsics } from "./intrinsics"; @@ -65,6 +66,12 @@ export interface ModCtx { shape_sites?: number; shape_guards?: number; shape_declined?: Record; + // shapes-plan P4.4: born-with-shape telemetry — literal sites + // batched into make_object_shaped, constructor prefixes batched + // into fill_object_shaped diamonds, and counted fence declines + born_shaped?: number; + ctor_fills?: number; + fence_declined?: Record; }; // --types-dump: per-site shape census lines (shapes-plan P4.3) shape_dump?: boolean; @@ -87,6 +94,12 @@ export interface SpecMode { result: "any" | "f64"; } +// shapes-plan P4.4: the runtime's shaped field-count ceiling +// (EJS_SHAPE_FIELD_CAP_MAX in runtime/ejs-shapes.h) — born-shaped sites +// beyond it would only ever take the runtime's sequential fallback, so +// they keep today's lowering +const EJS_SHAPE_FIELD_CAP_MAX = 14; + // an environment-descriptor chain node: a per-iteration loop env or a // function env (see envForBinding) type EnvDesc = LoopEnv | FnInfo; @@ -552,6 +565,31 @@ class LowerFunction { ); values.push(this.expr(p.value as e.Expression)); } + // shapes-plan P4.4: a statically-keyed literal is born + // with its shape — key order and count are the site's + // static truth, no oracle fact needed (the runtime + // derives true reprs from the actual values and falls + // back to sequential sets off the shaped fast path). + // Still --types-gated: flag-off lowering is untouched. + if ( + this.oracle && + !process.env["EJS_NO_BORN_SHAPED"] && + keys.length >= 1 && + keys.length <= EJS_SHAPE_FIELD_CAP_MAX && + new Set(keys).size === keys.length && + keys.every((k) => !/^[0-9]/.test(k)) + ) { + const fields: ShapeField[] = n.properties.map((p, i) => ({ + name: keys[i]!, + repr: this.operandIsNumber(p.value as e.Expression) + ? ("f64" as const) + : ("boxed" as const), + })); + const key = this.module.internShape(fields); + const stats = this.mod_ctx.typed_stats; + if (stats) stats.born_shaped = (stats.born_shaped ?? 0) + 1; + return this.b.emit("make_object_shaped", values, { shape: key }); + } return this.b.emit("make_object", values, { keys: keys }); } // computed keys or a `__proto__:` definition: empty object @@ -962,6 +1000,122 @@ class LowerFunction { this.b.setInsertPoint(join_bb); } + // --- shapes-plan P4.4: the fenced constructor prefix --------------------- + // + // Detect the maximal leading run of `this. = ` + // statements in a plain function body and batch it into ONE guarded + // fill_object_shaped diamond. The fence is structural and oracle-free + // (the P3.6 discipline — a lying oracle cannot make this wrong): + // + // - plain function, not an arrow (whose `this` is lexical), not the + // toplevel, not a specialization clone; + // - every stored value is a Literal or an Identifier resolving to a + // local binding — evaluating it cannot run user code, so hoisting + // the evaluations above the batched stores is observably identical; + // - nothing else appears between the stores (they are consecutive + // statements), so no code can observe the receiver mid-prefix — + // `"y" in this` between stores, an escaping call, a getter-running + // value all CUT the prefix at that statement; + // - names distinct, non-index-looking, not __proto__, count within + // the runtime's shaped field cap. + // + // The batching is additionally guarded at runtime by has_shape(this, "") + // — only a construct-fresh EMPTY receiver takes the fast arm; a reused + // this (F.call(o)), a dictionary-mode object, or EJS_SHAPES=off all + // fail the one-compare guard and run the original sequential stores. + // The runtime call re-checks everything again (incl. proto-chain + // accessor interception) and falls back to sequential [[Set]]s, so a + // wrong guard can cost speed, never behavior. EJS_NO_BORN_SHAPED is + // the bisect hook. Returns how many leading statements were consumed. + + fenceDecline(reason: string): void { + const stats = this.mod_ctx.typed_stats; + if (stats) { + const d = (stats.fence_declined ??= {}); + d[reason] = (d[reason] ?? 0) + 1; + } + } + + lowerBornShapedCtorPrefix(body: e.BlockStatement): number { + if (!this.oracle || process.env["EJS_NO_BORN_SHAPED"]) return 0; + if (this.isToplevel || this.spec) return 0; + if (this.info.node.type === "ArrowFunctionExpression") return 0; + + const names: string[] = []; + const valueNodes: e.Expression[] = []; + let cutReason: string | null = null; + for (const s of body.body) { + const cut = (why: string): true => ((cutReason = why), true); + if (s.type !== "ExpressionStatement") break; + const a = s.expression; + if (a.type !== "AssignmentExpression" || a.operator !== "=") break; + const m = a.left; + if (m.type !== "MemberExpression" || m.computed) break; + if (m.object.type !== "ThisExpression") break; + if (m.property.type !== "Identifier") break; + const name = m.property.name; + if (name === "__proto__" || /^[0-9]/.test(name)) { + cut("unshapeable-name"); + break; + } + if (names.includes(name)) { + cut("duplicate-name"); + break; + } + const v = a.right; + if (v.type !== "Literal" && !(v.type === "Identifier" && this.analysis.resolve(v))) { + cut("value-not-local"); + break; + } + names.push(name); + valueNodes.push(v); + } + if (names.length < 2) { + // a ctor-looking body (at least one conforming this-store) that + // did not reach the batching threshold is a counted decline; + // everything else simply is not a constructor prefix + if (names.length === 1) this.fenceDecline(cutReason ?? "short-prefix"); + return 0; + } + if (names.length > EJS_SHAPE_FIELD_CAP_MAX) { + this.fenceDecline("capped"); + return 0; + } + + // values first (locals/literals — effect-free), then the guard + const values = valueNodes.map((v) => this.expr(v)); + const fields: ShapeField[] = names.map((name, i) => ({ + name, + repr: this.operandIsNumber(valueNodes[i]!) ? ("f64" as const) : ("boxed" as const), + })); + const key = this.module.internShape(fields); + this.module.internShape([]); // the guard's empty shape + const thisVal = this.b.readVariable("%this", this.b.cur); + + const fast_bb = this.b.newBlock("ctor_fill_fast"); + const slow_bb = this.b.newBlock("ctor_fill_slow"); + const join_bb = this.b.newBlock("ctor_fill_join"); + const t = this.b.emit("has_shape", [thisVal], { shape: "" }); + this.b.condBr(t, fast_bb, [], slow_bb, []); + this.b.sealBlock(fast_bb); + this.b.sealBlock(slow_bb); + + this.b.setInsertPoint(fast_bb); + this.b.emit("fill_object_shaped", [thisVal, ...values], { shape: key }); + this.b.br(join_bb, []); + + this.b.setInsertPoint(slow_bb); + for (let i = 0; i < names.length; i++) + this.b.emit("set_prop_atom", [thisVal, values[i]!], { atom: names[i]! }); + this.b.br(join_bb, []); + this.b.sealBlock(join_bb); + this.b.setInsertPoint(join_bb); + + const stats = this.mod_ctx.typed_stats; + if (stats) stats.ctor_fills = (stats.ctor_fills ?? 0) + 1; + return names.length; + } + logical(n: e.LogicalExpression): Inst { let l = this.expr(n.left); let lbool = this.b.emit("to_boolean", [l], {}); @@ -2039,8 +2193,16 @@ function lowerOneFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, if (info.lowered) return info.fn!; info.lowered = true; let lf = new LowerFunction(info, analysis, module, mod_ctx); - if (info.node.body.type === "BlockStatement") lf.stmt(info.node.body); - else lf.b.ret(lf.expr(info.node.body)); // expression-bodied arrow + if (info.node.body.type === "BlockStatement") { + // shapes-plan P4.4: a fenced constructor's leading this-store run + // batches into one guarded fill; the remaining statements lower + // exactly as the BlockStatement case would have + const skip = lf.lowerBornShapedCtorPrefix(info.node.body); + for (let i = skip; i < info.node.body.body.length; i++) { + lf.stmt(info.node.body.body[i]!); + if (lf.b.cur.terminated) break; + } + } else lf.b.ret(lf.expr(info.node.body)); // expression-bodied arrow info.fn = lf.finish(); module.addFunction(info.fn); // hoisted closures may reference children whose declaration statement diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index d90027b8..25f262a6 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -208,6 +208,22 @@ export const OPS = { // contents" survives compiled stores). slot_load: { arity: 1, effects: E.READ, imms: ["shape", "slot", "repr"] }, slot_store: { arity: 2, effects: E.WRITE, imms: ["shape", "slot", "repr"] }, + // --- born with their shape (shapes-plan P4.4) ----------------------------- + // a statically-keyed object literal, allocated + installed in one + // runtime call: operands are the initial field values in imms.shape's + // field order. The runtime re-derives the true shape from the actual + // values (a wrong static repr can never mint a lying shape) and falls + // back to today's sequential generic sets whenever the shaped fast + // path doesn't apply — same GC|WRITE effect envelope as make_object. + make_object_shaped: { arity: -1, effects: E.GC | E.WRITE, imms: ["shape"] }, + // a fenced constructor's straight-line this-store prefix, batched onto + // the construct-allocated receiver: operands are [this, values...]. + // Only valid behind a passed has_shape(this, "") — the empty-shape + // guard — which the verifier enforces via the same un-killed-fact + // discipline as slot ops (a non-empty or dictionary-mode receiver + // must take the sequential slow arm, where mid-construction + // observables behave identically). + fill_object_shaped: { arity: -1, effects: E.GC | E.WRITE, imms: ["shape"] }, // a raw f64 constant (imms.value). minted only by the optimizer // (rawJoinParams' const-number edge roots) and the specialization // pass; lowering itself always emits boxed `const` numbers. diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 9e7599c3..08f85651 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -2410,6 +2410,277 @@ test("shapes-opt: a stale (earlier-block) has_shape compare never folds", () => verifyModule(mod2); }); +// --- shapes-plan P4.4: born with their shape ----------------------------------- + +test("born-shaped: a static literal lowers to make_object_shaped under --types", () => { + const { printed } = lowerWithOracle( + "function f(a) { return { x: 1, y: a }; }", + stubOracle({ a: ["number"] }) + ); + assertContains(printed, "make_object_shaped"); + assertContains(printed, 'shape="x:f64,y:f64"'); + assertNotContains(printed, "make_object "); +}); + +test("born-shaped: flag-off (null oracle) keeps today's make_object exactly", () => { + const { printed } = lowerWithOracle("function f(a) { return { x: 1, y: a }; }", null); + assertNotContains(printed, "make_object_shaped"); + assertContains(printed, "make_object"); +}); + +test("born-shaped: EJS_NO_BORN_SHAPED restores make_object", () => { + process.env["EJS_NO_BORN_SHAPED"] = "1"; + try { + const { printed } = lowerWithOracle( + "function f() { return { x: 1, y: 2 }; }", + stubOracle({}) + ); + assertNotContains(printed, "make_object_shaped"); + } finally { + delete process.env["EJS_NO_BORN_SHAPED"]; + } +}); + +test("born-shaped: index-looking and duplicate keys decline to make_object", () => { + const dup = lowerWithOracle('function f() { return { x: 1, x: 2 }; }', stubOracle({})); + assertNotContains(dup.printed, "make_object_shaped"); + const idx = lowerWithOracle('function f() { return { "0": 1, y: 2 }; }', stubOracle({})); + assertNotContains(idx.printed, "make_object_shaped"); +}); + +test("born-shaped: computed keys / accessors / __proto__ keep the store path", () => { + const comp = lowerWithOracle("function f(k) { return { [k]: 1, y: 2 }; }", stubOracle({})); + assertNotContains(comp.printed, "make_object_shaped"); + const acc = lowerWithOracle( + "function f() { return { get x() { return 1; } }; }", + stubOracle({}) + ); + assertNotContains(acc.printed, "make_object_shaped"); + const proto = lowerWithOracle( + "function f(p) { return { __proto__: p, y: 2 }; }", + stubOracle({}) + ); + assertNotContains(proto.printed, "make_object_shaped"); +}); + +test("ctor-fill: a straight-line this-store prefix lowers to the guarded fill", () => { + const { printed } = lowerWithOracle( + "function Pt(x, y) { this.x = x; this.y = y; }", + stubOracle({ x: ["number"], y: ["number"] }) + ); + assertContains(printed, 'has_shape'); + assertContains(printed, 'shape=""'); // the empty-shape guard + assertContains(printed, "fill_object_shaped"); + assertContains(printed, 'shape="x:f64,y:f64"'); + assertContains(printed, "ctor_fill_slow"); + assertContains(printed, "set_prop_atom"); // the sequential slow arm survives +}); + +test("ctor-fill: flag-off keeps the sequential stores exactly", () => { + const { printed } = lowerWithOracle("function Pt(x, y) { this.x = x; this.y = y; }", null); + assertNotContains(printed, "fill_object_shaped"); + assertNotContains(printed, "has_shape"); + assertContains(printed, "set_prop_atom"); +}); + +test("ctor-fill: a call-valued store cuts the prefix (fence, oracle-free)", () => { + // `this.y = g()` could observe the receiver via g — the prefix must + // stop before it even though a lying oracle calls everything a number + const { printed } = lowerWithOracle( + "function Pt(x, g) { this.x = x; this.y = g(); }", + stubOracle({ x: ["number"], y: ["number"], g: ["number"] }) + ); + assertNotContains(printed, "fill_object_shaped"); +}); + +test("ctor-fill: `in` mid-prefix cuts the batch (the P4.4 observable)", () => { + const { printed } = lowerWithOracle( + 'function Pt(x, y) { this.x = x; this.t = "y" in this; this.y = y; }', + stubOracle({ x: ["number"], y: ["number"] }) + ); + assertNotContains(printed, "fill_object_shaped"); +}); + +test("ctor-fill: an escaping receiver before the stores declines", () => { + const { printed } = lowerWithOracle( + "function Pt(x, g) { g(this); this.x = x; this.y = x; }", + stubOracle({ x: ["number"] }) + ); + assertNotContains(printed, "fill_object_shaped"); +}); + +test("ctor-fill: a single-store prefix stays sequential (threshold)", () => { + const { printed } = lowerWithOracle( + "function Pt(x) { this.x = x; }", + stubOracle({ x: ["number"] }) + ); + assertNotContains(printed, "fill_object_shaped"); +}); + +test("ctor-fill: EJS_NO_BORN_SHAPED disables the fill diamond", () => { + process.env["EJS_NO_BORN_SHAPED"] = "1"; + try { + const { printed } = lowerWithOracle( + "function Pt(x, y) { this.x = x; this.y = y; }", + stubOracle({}) + ); + assertNotContains(printed, "fill_object_shaped"); + } finally { + delete process.env["EJS_NO_BORN_SHAPED"]; + } +}); + +// --- born-shaped verifier rules (hand-built attack IR) -------------------------- + +interface FillAttackOpts { + guarded?: boolean; // guard the fill with has_shape(recv, "") (default true) + killInFast?: boolean; // a call between the guard and the fill + wrongCount?: boolean; // operand count != shape field count + guardShape?: string; // guard against this shape instead of "" +} + +function buildFillAttack(o: FillAttackOpts): Module { + const guarded = o.guarded !== false; + const fb = new FunctionBuilder("fillattack", ["%env", "%this", "a", "b"]); + const recv = fb.fn.entry!.params[1]!; + const a = fb.fn.entry!.params[2]!; + const bV = fb.fn.entry!.params[3]!; + const shapeKey = "x:boxed,y:boxed"; + + const fast = fb.newBlock("fast"); + const slow = fb.newBlock("slow"); + const join = fb.newBlock("join"); + const cond = guarded + ? fb.emit("has_shape", [recv], { shape: o.guardShape ?? "" }) + : fb.emit("to_boolean", [recv], {}); + fb.condBr(cond, fast, [], slow, []); + fb.sealBlock(fast); + fb.sealBlock(slow); + + fb.setInsertPoint(fast); + if (o.killInFast) fb.emit("call_runtime", [], { name: "ToString" }); + const vals = o.wrongCount ? [a] : [a, bV]; + fb.emit("fill_object_shaped", [recv, ...vals], { shape: shapeKey }); + fb.br(join, []); + + fb.setInsertPoint(slow); + fb.emit("set_prop_atom", [recv, a], { atom: "x" }); + fb.emit("set_prop_atom", [recv, bV], { atom: "y" }); + fb.br(join, []); + + fb.sealBlock(join); + fb.setInsertPoint(join); + fb.ret(fb.constUndefined()); + + const mod = new Module("fillattack_mod"); + mod.addFunction(fb.finish()); + mod.internShape([]); + mod.internShape([ + { name: "x", repr: "boxed" }, + { name: "y", repr: "boxed" }, + ]); + return mod; +} + +test("born-verify: a guarded fill in the empty-guard's true arm verifies", () => { + verifyModule(buildFillAttack({})); +}); + +test("born-verify: a fill without the empty-shape fact is rejected", () => { + assertThrows(() => verifyModule(buildFillAttack({ guarded: false })), "empty shape"); +}); + +test("born-verify: a WRITE|CALL between guard and fill kills the fact", () => { + assertThrows(() => verifyModule(buildFillAttack({ killInFast: true })), "empty shape"); +}); + +test("born-verify: a non-empty guard shape does not license the fill", () => { + // guarding has_shape(recv, "x:boxed,y:boxed") proves the receiver is + // FULL, not empty — batching stores onto it would double-install + assertThrows( + () => verifyModule(buildFillAttack({ guardShape: "x:boxed,y:boxed" })), + "empty shape" + ); +}); + +test("born-verify: operand count must match the shape's field count", () => { + assertThrows(() => verifyModule(buildFillAttack({ wrongCount: true })), "values for shape"); +}); + +test("born-verify: make_object_shaped checks field count and known shape", () => { + const fb = new FunctionBuilder("mkattack", ["%env", "%this", "a"]); + const a = fb.fn.entry!.params[2]!; + fb.emit("make_object_shaped", [a], { shape: "x:boxed,y:boxed" }); + fb.ret(fb.constUndefined()); + const mod = new Module("mkattack_mod"); + mod.addFunction(fb.finish()); + mod.internShape([ + { name: "x", repr: "boxed" }, + { name: "y", repr: "boxed" }, + ]); + assertThrows(() => verifyModule(mod), "values for shape"); + + const fb2 = new FunctionBuilder("mkattack2", ["%env", "%this", "a"]); + const a2 = fb2.fn.entry!.params[2]!; + fb2.emit("make_object_shaped", [a2], { shape: "nope:boxed" }); + fb2.ret(fb2.constUndefined()); + const mod2 = new Module("mkattack2_mod"); + mod2.addFunction(fb2.finish()); + assertThrows(() => verifyModule(mod2), "unknown module shape"); +}); + +// the optimizer/verifier proof-strength pin (found by +// types-bornshapewrong1): foldProvenGuards deletes a has_tag over a +// const-number join (`c ? 1 : 0`), so the verifier's intrinsic proof must +// accept the join param for the slot_store it uncovers +function buildConstJoinStore(nonNumberEdge: boolean): Module { + const fb = new FunctionBuilder("cjstore", ["%env", "%this", "p", "c"]); + const p = fb.fn.entry!.params[2]!; + const c = fb.fn.entry!.params[3]!; + const shapeKey = "x:f64,y:f64"; + const then_bb = fb.newBlock("then"); + const else_bb = fb.newBlock("else"); + const vjoin = fb.newBlock("vjoin"); + const v = vjoin.addParam("v"); + const fast = fb.newBlock("fast"); + const out = fb.newBlock("out"); + const cb = fb.emit("to_boolean", [c], {}); + fb.condBr(cb, then_bb, [], else_bb, []); + fb.sealBlock(then_bb); + fb.sealBlock(else_bb); + fb.setInsertPoint(then_bb); + fb.br(vjoin, [fb.constNumber(1)]); + fb.setInsertPoint(else_bb); + fb.br(vjoin, [nonNumberEdge ? fb.constUndefined() : fb.constNumber(0)]); + fb.sealBlock(vjoin); + fb.setInsertPoint(vjoin); + const g = fb.emit("has_shape", [p], { shape: shapeKey }); + fb.condBr(g, fast, [], out, []); + fb.sealBlock(fast); + fb.setInsertPoint(fast); + // no has_tag: the store's number proof is the const join itself + fb.emit("slot_store", [p, v], { shape: shapeKey, slot: 0, repr: "f64" }); + fb.br(out, []); + fb.sealBlock(out); + fb.setInsertPoint(out); + fb.ret(fb.constUndefined()); + const mod = new Module("cjstore_mod"); + mod.addFunction(fb.finish()); + mod.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + return mod; +} + +test("born-verify: a const-number join proves an f64 store without has_tag", () => { + verifyModule(buildConstJoinStore(false)); +}); + +test("born-verify: a join with a non-number edge still requires has_tag", () => { + assertThrows(() => verifyModule(buildConstJoinStore(true)), "has_tag"); +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index b55a6d18..9bf6883a 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -171,6 +171,27 @@ export function provenNumberIntrinsic(v: Inst, depth = 6): boolean { provenNumberIntrinsic(v.operands[0]!, depth - 1) && provenNumberIntrinsic(v.operands[1]!, depth - 1) ); + // a join whose every incoming is itself intrinsically a number (e.g. + // `c ? 1 : 0` — const-number edges) is immutably a number. This + // mirrors provenNumberAt's blockparam case in optimize-guards: the + // optimizer folds a has_tag over such a join, so the verifier must + // accept the same proof for the slot_store it uncovers (the P4.2 + // proof-mismatch lesson, replayed — found by types-bornshapewrong1's + // ternary-valued constructor store). + if (v.op === "blockparam" && !v.isException && v.block && !v.block.isCatch) { + const b = v.block; + if (b.predEdges.length === 0) return false; + const argIdx = b.argIndexOfParam(v); + let anyProven = false; + for (const e of b.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; + if (!arg) return false; + if (arg === v) continue; // self-edge: vacuous + if (!provenNumberIntrinsic(arg, depth - 1)) return false; + anyProven = true; + } + return anyProven; + } return false; } @@ -544,11 +565,42 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { if (!reachable.has(b)) continue; b.insts.forEach((inst, i) => { const isSlotOp = inst.op === "slot_load" || inst.op === "slot_store"; - if (!isSlotOp && inst.op !== "has_shape") return; + const isBornOp = inst.op === "make_object_shaped" || inst.op === "fill_object_shaped"; + if (!isSlotOp && !isBornOp && inst.op !== "has_shape") return; const shapeImm = String(inst.imms["shape"]); const fields = mod ? mod.shapes.get(shapeImm) : undefined; if (mod && !fields) fail(`'${inst.op}' names unknown module shape '${shapeImm}'`, inst); + if (isBornOp) { + // shapes-plan P4.4: operand count must equal the shape's + // field count (+1 receiver for fill), at least one field — + // an empty born shape is a plain make_object, not this op. + const nvals = + inst.op === "make_object_shaped" + ? inst.operands.length + : inst.operands.length - 1; + if (fields && nvals !== fields.length) + fail( + `'${inst.op}' has ${nvals} values for shape '${shapeImm}' (${fields.length} fields)`, + inst + ); + if (nvals < 1) fail(`'${inst.op}' must install at least one field`, inst); + if (inst.op === "fill_object_shaped") { + // the receiver must be proven EMPTY-shaped here: the + // batched prefix is only equivalent to the sequential + // stores on an object with no fields yet (an un-killed + // has_shape(recv, "") fact — same engine as slot ops) + if (shapeFacts === undefined) shapeFacts = computeShapeFacts(fn); + const facts = shapeFacts ? shapeFacts.factsAt(b, i) : new Set(); + if (!facts.has(shapeFactKey(inst.operands[0]!.id, ""))) + fail( + `'fill_object_shaped' is not covered by an un-killed has_shape fact ` + + `for the empty shape on its receiver`, + inst + ); + } + return; + } if (!isSlotOp) return; const slot = inst.imms["slot"]; diff --git a/lib/runtime.ts b/lib/runtime.ts index 887b9542..357a6a9f 100644 --- a/lib/runtime.ts +++ b/lib/runtime.ts @@ -273,6 +273,23 @@ const runtime_interface = { ]) ); }, + // born-with-shape (shapes-plan P4.4): batched literal allocation and + // fenced-constructor prefix fill. argc, names*, values*. + object_new_shaped: function (this: RuntimeContext) { + return this.abi.createExternalFunction(this.module, "_ejs_object_new_shaped", ty.EjsValue, [ + ty.Int32, + ty.EjsValue.pointerTo(), + ty.EjsValue.pointerTo(), + ]); + }, + object_fill_shaped: function (this: RuntimeContext) { + return this.abi.createExternalFunction( + this.module, + "_ejs_object_fill_shaped", + ty.EjsValue, + [ty.EjsValue, ty.Int32, ty.EjsValue.pointerTo(), ty.EjsValue.pointerTo()] + ); + }, global_setprop: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_global_setprop", ty.EjsValue, [ ty.EjsValue, diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 89e13160..0684acc2 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -647,6 +647,97 @@ _ejs_object_to_dictionary (EJSObject* obj, EJSShapeMigrateReason reason) _ejs_shape_object_migrate (obj, reason); } +// ------------------------------------------------------------------------ +// born-with-shape allocation (shapes-plan P4.4). Compiled --types code +// batches an object literal's (or a fenced constructor prefix's) stores +// into one call carrying the field names (interned atoms) and values in +// source order. The TRUE shape is re-derived from the actual values via +// the transition memo (~one compare per field on the monomorphic path), +// so a wrong static repr claim can never mint a lying shape; whenever +// anything is off-script the call falls back to today's sequential +// generic sets, byte-for-byte. + +// would assigning any of names[0..nfields) run something other than a +// plain data-property creation on the receiver? Assignment is [[Set]]: +// a proto-chain accessor intercepts, and a non-writable proto data +// property silently swallows the write (sloppy mode) — both must take +// the sequential path. Shaped-mode protos hold only default writable +// data fields, so only dictionary-mode protos need their maps probed; +// any exotic proto bails conservatively. +static EJSBool +shaped_proto_intercepts (ejsval proto, uint32_t nfields, const ejsval* names) +{ + for (ejsval p = proto; EJSVAL_IS_OBJECT(p); p = EJSVAL_TO_OBJECT(p)->proto) { + EJSObject* po = EJSVAL_TO_OBJECT(p); + if (po->ops != &_ejs_Object_specops) + return EJS_TRUE; + if (EJS_OBJECT_SHAPE(po) != EJS_SHAPE_DICT) + continue; + for (uint32_t i = 0; i < nfields; i ++) { + EJSPropertyDesc* d = _ejs_propertymap_lookup (po->map, names[i]); + if (d && (IsAccessorDescriptor(d) || !_ejs_property_desc_is_writable(d))) + return EJS_TRUE; + } + } + return EJS_FALSE; +} + +// try to install names/values wholesale on an empty root-shaped ordinary +// object. EJS_FALSE (object untouched) means the caller must run the +// sequential generic path. +static EJSBool +try_fill_shaped (ejsval objval, uint32_t argc, const ejsval* names, ejsval* values) +{ + if (!_ejs_shapes_tracking || argc == 0 || argc > EJS_SHAPE_FIELD_CAP_MAX) + return EJS_FALSE; + EJSObject* obj = EJSVAL_TO_OBJECT(objval); + if (obj->ops != &_ejs_Object_specops) + return EJS_FALSE; + // only an empty, extensible, shaped object qualifies: anything else + // (dictionary mode, existing fields, freeze) owes the generic + // algorithm. The compiled fast arm is guarded on exactly this, but + // the check is one compare and makes the call safe under any caller. + if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_ROOT || !EJS_OBJECT_IS_EXTENSIBLE(obj)) + return EJS_FALSE; + if (shaped_proto_intercepts (obj->proto, argc, names)) + return EJS_FALSE; + uint32_t shape = EJS_SHAPE_ROOT; + for (uint32_t i = 0; i < argc; i ++) { + EJSShapeMigrateReason reason; + shape = _ejs_shape_transition_add_fast (shape, names[i], values[i], &reason); + if (shape == EJS_SHAPE_DICT) + return EJS_FALSE; // index-looking key / cap / table full + } + shaped_ensure_capacity (obj, argc); + memcpy (shaped_slots(obj), values, argc * sizeof(ejsval)); + EJS_OBJECT_SET_SHAPE(obj, shape); + return EJS_TRUE; +} + +// a statically-keyed object literal: allocate + install in one call +ejsval +_ejs_object_new_shaped (uint32_t argc, ejsval* names, ejsval* values) +{ + ejsval obj = _ejs_object_create (_ejs_Object_prototype); + if (!try_fill_shaped (obj, argc, names, values)) { + for (uint32_t i = 0; i < argc; i ++) + _ejs_object_setprop (obj, names[i], values[i]); + } + return obj; +} + +// a fenced constructor's straight-line store prefix, batched onto the +// construct-allocated `this` (whose proto is F.prototype) +ejsval +_ejs_object_fill_shaped (ejsval objval, uint32_t argc, ejsval* names, ejsval* values) +{ + if (!EJSVAL_IS_OBJECT(objval) || !try_fill_shaped (objval, argc, names, values)) { + for (uint32_t i = 0; i < argc; i ++) + _ejs_object_setprop (objval, names[i], values[i]); + } + return objval; +} + // shaped GetOwnProperty synthesizes the default data descriptor for a // slot into a static ring. Entries are transient — valid until // SYNTH_DESC_RING subsequent shaped GetOwnProperty hits — which the diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index 85ccc6fe..7f5288e7 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -298,6 +298,15 @@ ejsval _ejs_object_literal_set_proto (ejsval obj, ejsval proto); ejsval _ejs_object_create (ejsval proto); +// born-with-shape (shapes-plan P4.4): batch a statically-keyed literal's +// (new_shaped) or a fenced constructor prefix's (fill_shaped) field +// installs into one call. names are interned atoms and values the +// initial field values, in source order; both fall back to sequential +// generic sets whenever the shaped fast path doesn't apply, so behavior +// is identical to the unbatched lowering (incl. EJS_SHAPES=off). +ejsval _ejs_object_new_shaped (uint32_t argc, ejsval* names, ejsval* values); +ejsval _ejs_object_fill_shaped (ejsval obj, uint32_t argc, ejsval* names, ejsval* values); + void _ejs_Object_init (ejsval ejs_global); EJS_END_DECLS diff --git a/runtime/ejs-shapes.c b/runtime/ejs-shapes.c index a244e1ec..e5107733 100644 --- a/runtime/ejs-shapes.c +++ b/runtime/ejs-shapes.c @@ -339,7 +339,12 @@ _ejs_shape_intern(uint32_t nfields, const ejsval *names, uint32_t f64_mask) { if (!_ejs_shapes_tracking) return EJS_SHAPE_NOMATCH; - if (nfields == 0 || nfields > shape_field_cap || nfields > 32) + /* the empty shape IS the root: P4.4's fill_object_shaped guard + (has_shape(this, "")) interns zero fields and must match the + construct-allocated empty receiver */ + if (nfields == 0) + return EJS_SHAPE_ROOT; + if (nfields > shape_field_cap || nfields > 32) return EJS_SHAPE_NOMATCH; uint32_t shape = EJS_SHAPE_ROOT; diff --git a/test/types/README.md b/test/types/README.md index 3fbf20f0..0af5b968 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -34,8 +34,10 @@ counts has_shape diamonds the way `diamonds=N` counts has_tag ones): | probe | shape | shapeGuards | vs node | |---|---|---|---| -| types-bench2 | the object-model microbenchmark: monomorphic constructor + p.x/p.y kernel; guarded fast paths + shape-region merging (`shapeGuards=10`, 2 shape regions merged); 2026-07-24 numbers: --types 3.06s vs flag-off 6.56s (2.1×), vs EJS_SHAPES=off 5.82s (~1.9× shapes-attributable) | 10 | match | +| types-bench2 | the object-model microbenchmark: monomorphic constructor + p.x/p.y kernel; guarded fast paths + shape-region merging (`shapeGuards=10`, 2 shape regions merged); 2026-07-24 numbers: --types 3.06s vs flag-off 6.56s (2.1×), vs EJS_SHAPES=off 5.82s (~1.9× shapes-attributable); P4.4 born-with-shape (`ctorFills=1`) takes it to **2.03s** vs flag-off 6.76s (3.3×) | 10 | match | | types-shapeswrong1 | the wrong-oracle shape guard: lib types sumxy's receiver {x: num, y: num} from its one local call; main hands it a repr-mismatched object ("ab"), an extra-field object, and a dictionary-mode (post-delete) object → all route slow with node-identical values; the matching Point goes fast | 4 (in lib) | n/a¹ | +| types-bornshape1 | born-with-shape (P4.4): a static literal is make_object_shaped, the Pt ctor prefix is the empty-shape-guarded fill (`bornShaped=1 ctorFills=1`); keys order, `in`, growth past the born shape, and a repr-differing construction all match node | 0 | match | +| types-bornshapewrong1 | P4.4 edge cases: a reused non-empty receiver (guard fails), an `in`-cut fence, a frozen receiver (runtime re-check), a proto-chain SETTER intercepting the batched store, and a non-writable proto data prop — every one routes sequential with node-identical output (`bornShaped=3 ctorFills=3 fenceDeclined=short-prefix:1`); also found the provenNumberIntrinsic const-join gap (see verifier.ts) | 0 | match | ¹ node cannot execute this file's bare-ESM import layout from test/; the check here is flag-off vs `--types` executables producing identical diff --git a/test/types/types-bornshape1.js b/test/types/types-bornshape1.js new file mode 100644 index 00000000..9c173655 --- /dev/null +++ b/test/types/types-bornshape1.js @@ -0,0 +1,21 @@ +// born-with-shape probe (shapes-plan P4.4): statically-keyed literals +// lower to make_object_shaped, fenced constructor prefixes to the +// empty-shape-guarded fill_object_shaped — stdout must match node +// exactly, including enumeration order, `in` results, and growth past +// the born shape. Stats line: bornShaped/ctorFills counts. +function Pt(x, y) { this.x = x; this.y = y; } +var p = new Pt(1, 2); +console.log(p.x + p.y); +console.log(Object.keys(p).join(",")); + +var lit = { a: 1, b: "s", c: true }; +console.log(Object.keys(lit).join(",")); +console.log(lit.a + lit.b); + +p.tag = "t"; // grow past the born shape (a plain transition) +console.log(Object.keys(p).join(",")); +console.log(("x" in p) + ":" + ("z" in p)); + +var mixed = new Pt("s", 2); // reprs differ from the candidate: still correct +console.log(mixed.x + mixed.y); +console.log(Object.keys(mixed).join(",")); diff --git a/test/types/types-bornshapewrong1.js b/test/types/types-bornshapewrong1.js new file mode 100644 index 00000000..a4f39c0f --- /dev/null +++ b/test/types/types-bornshapewrong1.js @@ -0,0 +1,43 @@ +// born-with-shape wrong/edge cases (shapes-plan P4.4): the empty-shape +// guard and the runtime re-checks route every off-script construction +// through the sequential path with node-identical behavior. +function Pt(x, y) { this.x = x; this.y = y; } + +// a reused non-empty receiver: the guard fails, sequential stores run +var reuse = { z: 9 }; +Pt.call(reuse, 1, 2); +console.log(reuse.z + reuse.x + reuse.y); +console.log(Object.keys(reuse).join(",")); + +// `in` mid-construction cuts the fence at compile time +function Probe(x, y) { + this.a = ("b" in this) ? 1 : 0; + this.b = y; +} +var q = new Probe(5, 6); +console.log(q.a + ":" + q.b); + +// a non-extensible receiver: the runtime re-check falls back, and the +// sequential [[Set]]s fail silently exactly like node (sloppy mode) +var frozen = Object.freeze({}); +Pt.call(frozen, 7, 8); +console.log("" + ("x" in frozen)); + +// a proto-chain SETTER must intercept the batched assignment (the +// shaped_proto_intercepts fallback): hijack captures x, y stores own. +// (defineProperty, not an accessor literal — a getter/setter literal is +// a maam NormalizeError and would kill the oracle for the whole module, +// leaving nothing born-shaped to test.) +function P2(x, y) { this.x = x; this.y = y; } +P2.prototype = {}; +Object.defineProperty(P2.prototype, "x", { + set: function (v) { this.hijack = v; } +}); +var h = new P2(1, 2); +console.log(h.hijack + ":" + h.x + ":" + h.y); + +// a non-writable proto data property silently swallows the own-store +function P3(a, b) { this.a = a; this.b = b; } +P3.prototype = Object.freeze({ a: 99 }); +var w = new P3(1, 2); +console.log(("a" in w) + ":" + w.a + ":" + w.b); From fa7707e17f3810f949001681ea9614a379021f49 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 16:58:27 -0700 Subject: [PATCH 110/146] eir: P4.5 typed slots + shape/numeric region fusion under --types MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The compiler half of shapes-plan P4.5 (gc-P5 consumption stays sequenced behind the mover, which gets its addressing contract here). The seam flip (as the P4.3 entry planned): slot_load/slot_store with repr:"f64" now produce/consume RAW f64. Pure type-flow — the NaN-box stores doubles raw, so the emitter just loads/stores the slot as a machine double at the same address. Lowering stamps the load's type and boxes once at the fast exit; stores unbox under the existing has_tag guard. The verifier types slot ops by their repr immediate (the call_typed precedent), and the typed store dissolves the P4.3/P4.4 proof-strength hazard class outright: the repr proof is the operand TYPE, which no guard-folding can strip — provenNumberIntrinsic is deleted; boxed-repr stores keep the has_tag=false dominance rule. Fusion (shape facts feeding the raw-value machinery): shape regions generalize to mixed content — the slow chain admits the numeric whitelist, the twin check pairs loads<->gets AND f64-ops<->generic-ops (box_f64 of an f64 slot_load corresponds to the load's paired get, bit-for-bit), and tryMergeShapeNumericAt merges the numeric region at a shape region's join into it. foldProvenGuards now runs inside the shape fixpoint, so post-merge has_tag guards (fed only fast-side boxes) fold, rawJoinParams turns the joins raw, and the next round grows the region: p.x*p.x + p.y*p.y ends at ONE has_shape, 4 raw loads, raw arithmetic, one generic slow path (unit-pinned, incl. the boxed-field re-execution refusal attack). EJS_NO_SHAPE_FUSION is the bisect hook; the seam itself is a verifier-owned contract change with no off switch. Clones get typed slots for free (bodies lower against box_f64(formal); unbox(box) annihilation yields raw stores); clone-internal UNGUARDED slot access is deliberately NOT built — measured at parity already, deferred per criterion 3. Telemetry: shapeTyped=loads:N,stores:M. Gate (all green): matrix x7; --types diff lane 464 files 0-divergent (suite: 839 guards, 407 typed loads / 36 typed stores); new probe types-typedslots1 node-identical incl. EJS_SHAPES=off and gc-stress. Measured honestly: types-bench2 total unchanged at 2.04s — 1.71s of it is the allocation loop (gc-P5's half). A variable-receiver 20M-iter kernel runs 0.31s vs 3.28s flag-off (10.6x) with P4.4-boxed, P4.5-typed, fused, and specialized all at parity (Apple-Silicon OoO + LLVM already hid the boxed round-trips); what the seam buys today is that invariant-receiver kernels now constant-fold completely (0.31s -> 0.00s — the boxed form never could), and the guarded path reaches parity with the trusted P3.6 clone. Co-Authored-By: Claude Fable 5 --- docs/shapes-plan.md | 97 +++++++-- lib/compiler.ts | 4 + lib/eir/emit.ts | 18 +- lib/eir/integrate.ts | 13 +- lib/eir/lower.ts | 31 ++- lib/eir/ops.ts | 23 ++- lib/eir/optimize-guards.ts | 351 ++++++++++++++++++++++++++++---- lib/eir/optimize.ts | 22 +- lib/eir/tests.ts | 232 ++++++++++++++++++--- lib/eir/verifier.ts | 98 ++++----- test/types/README.md | 3 +- test/types/types-typedslots1.js | 68 +++++++ 12 files changed, 814 insertions(+), 146 deletions(-) create mode 100644 test/types/types-typedslots1.js diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index 626667c5..43094e15 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -671,16 +671,84 @@ revertable, runtime phases A/B-able against the old path. flag-off 6.76s ⇒ **3.3×** total, the new 1.5× step being the allocation batching: `ctorFills=1` covers the ctor in both the kern and alloc loops). -- [ ] **P4.5 — Typed slots × specialization × GC.** `repr:"f64"` slots - unboxed end-to-end inside guard regions and P3.6 clones (shape - facts feeding the raw-value machinery); clone-internal unguarded - slot access behind the P3.6 escape fences; gc-P5 consumption when - the mover lands (trace bitmaps, inline slots, memcpy evacuation, - barrier/trace elision for f64 slots) — sequenced by gc-plan, the - compiler contract here is already shaped for it (slot-index - immediates, one addressing seam). - *Gate:* types-bench2 typed delta; harness + lane green; gc stress - modes when applicable. +- [x] **P4.5 — Typed slots × specialization × GC (compiler half).** + DONE 2026-07-24. The gc-P5 half (trace bitmaps, inline slots, + memcpy evacuation, barrier/trace elision) stays sequenced behind + the mover per gc-plan; the compiler contract it needs was finished + here. As built: + - **The seam flip** (the P4.3 plan, executed): `slot_load + repr:"f64"` produces a RAW f64 (lowering stamps `Inst.type`, + boxes once at the fast exit — the join stays boxed since its slow + edge is the generic get); `slot_store repr:"f64"` consumes a raw + f64 (lowering unboxes under the existing has_tag guard). The + emitter loads/stores the slot as a machine double — same address, + same 8 bytes (the NaN-box stores doubles raw), so the flip is + pure type-flow, zero runtime change. slot ops are typed by their + repr immediate the way call_typed is typed by its callee (a + per-op sig can't express either) — the verifier checks the + result stamp against the repr and requires an f64-typed operand + for f64 stores. **The typed store dissolves P4.3's + proof-strength hazard class**: the store's repr proof is now the + operand TYPE, which no guard-folding can strip — + provenNumberIntrinsic (the P4.4 escape hatch that mirrored + optimizer folds) is deleted; boxed-repr stores keep the + has_tag=false dominance rule. No off switch for the seam: it is + a contract change the verifier owns. + - **Fusion** (`shape facts feeding the raw-value machinery`): the + shape-region machinery generalizes to MIXED regions — the slow + chain admits the numeric whitelist ops, the twin check pairs + loads↔gets AND f64-ops↔generic-ops (a box_f64 of an f64 + slot_load corresponds to the load's paired get: doubles are + stored raw, so the get returns bit-for-bit the boxed rendition), + and `tryMergeShapeNumericAt` merges the NUMERIC region at a + shape region's join into it (the heterogeneous merge). After a + het merge r2's has_tag params are fed only by fast-side box_f64 + values, so foldProvenGuards (now run inside the shape fixpoint) + deletes them, rawJoinParams turns the joins raw, and the next + round's matcher grows the region — the cascade ends at ONE + has_shape guard, raw loads, raw arithmetic, one generic slow + path (`p.x*p.x + p.y*p.y` ⇒ 1 guard, 4 raw loads, 0 has_tag — + pinned at unit level). Re-executing r1's slow chain may now + re-run generic arithmetic: sound when each operand is + proven-number at the fast exit OR is one of r1's own paired gets + naming an f64-REPR field (an f64 slot holds a number by the + shaped-world invariant; the boxed-field version of that attack + is unit-pinned to refuse). `EJS_NO_SHAPE_FUSION` is the bisect + hook (criterion 6). + - **Clones**: typed slots reach P3.6 clone interiors through the + existing machinery with no new code — clone bodies lower against + `box_f64(formal)`, so the typed store's `unbox(box(p))` + annihilates into a raw store and slot loads are raw everywhere. + Clone-internal UNGUARDED slot access (dropping has_shape via the + escape fence) is NOT built: criterion 3 says later-measured- + never-first, and the measurements below show the guarded typed + path already at parity with the trusted clone — there is + currently nothing for unguardedness to win. Revisit only on + benchmark evidence (P4.6 discipline). + - **Telemetry**: stats line grows `shapeTyped=loads:N,stores:M` + (additive); EIR-opt debug line grows the het-merge count. + *Gate results (2026-07-24):* matrix ×7 green (test-eir + new + typed/fusion/re-exec attack unit tests, lowtier, stages 0-3, + `//:test-stage1-shapes-off`); --types diff lane 0-divergent (460 + files incl. the new probe); probe `types-typedslots1` (fused + kernel on matching + repr-mismatched + extra-field + dictionary + receivers; -0/NaN/Infinity bit-survival through raw slot traffic; + repr-flip transition mid-kernel; boxed-field stores) node-identical + in all modes incl. EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7. + **Measured honestly**: types-bench2 total is UNCHANGED (2.04s vs + P4.4's 2.03s) because 1.71s of it is the allocation loop — the + gc-P5 half owns that. The kernel itself: a variable-receiver + 20M-iteration kernel runs 0.31s under --types vs 3.28s flag-off + (10.6×), IDENTICAL between P4.4-boxed, P4.5-typed, fused, unfused, + and specialized — Apple-Silicon OoO + LLVM already hid the boxed + round-trips, so the typed/fusion wall-time delta on this hardware + is ~0. What the seam DOES buy today: an invariant-receiver kernel + (types-bench2's literal `kern(new Point(3,4), 1e6)` shape) now + CONSTANT-FOLDS COMPLETELY (0.31s → 0.00s; the boxed form never + could — LLVM can finally see the loads are pure doubles), the + guarded path reaches parity with the trusted P3.6 clone, and the + IR meets gc-P5 with one addressing seam, slot-index immediates, + and straight-line raw regions to point inline-slot addressing at. - [ ] **P4.6 — Measured extensions.** 2-way polymorphic guards; accessor inlining from monomorphic `accessorSites()`; pretenuring hooks (gc-plan's oracle pretenuring); array element shapes. Each @@ -803,7 +871,12 @@ layout change whichever lands first. entry (harness shapes lane green, types-bench2 3.06s → 2.03s, ctor batching = the empty-shape-guarded body-side fill; no maam constructor query needed). -- [ ] **P4.5** typed slots × clones × gc-P5 consumption. Gate: typed - delta, all lanes green. +- [x] **P4.5** typed slots × clones × gc-P5 consumption (compiler half; + gc-P5 consumption waits on the mover). Gate: typed delta measured + and recorded, all lanes green. DONE 2026-07-24 — see the + phased-plan entry above (raw f64 slot ops + heterogeneous region + fusion; bench2 total unchanged at 2.04s because the residual is + the alloc loop; invariant-receiver kernels now constant-fold; + guarded path at parity with trusted clones). - [ ] **P4.6** measured extensions (poly guards, accessor inlining, pretenuring, arrays) — evidence-gated. diff --git a/lib/compiler.ts b/lib/compiler.ts index 846ba724..df68e5b2 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -880,6 +880,10 @@ export function compile( ? ` shapeSites=${lowered.shape_sites} shapeGuards=${lowered.shape_guards ?? 0}` + ` shapeDeclined=${declineStr || "none"}` : "") + + // shapes-plan P4.5: typed slot telemetry (additive) + ((lowered.typed_loads ?? 0) > 0 || (lowered.typed_stores ?? 0) > 0 + ? ` shapeTyped=loads:${lowered.typed_loads ?? 0},stores:${lowered.typed_stores ?? 0}` + : "") + // shapes-plan P4.4: born-with-shape telemetry (additive) ((lowered.born_shaped ?? 0) > 0 || (lowered.ctor_fills ?? 0) > 0 ? ` bornShaped=${lowered.born_shaped ?? 0} ctorFills=${lowered.ctor_fills ?? 0}` diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 2c3f3585..2da100bf 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -623,14 +623,28 @@ export class EIREmitter { this.values.set(inst, phi); return; } + // P4.5 typed slots: an f64-repr slot is accessed as a raw + // double — same address, same 8 bytes (the NaN-box stores + // doubles raw), just loaded/stored as the machine type the + // guard's repr proof licenses. case "slot_load": { const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); - this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot_val")); + if (inst.imms["repr"] === "f64") { + const dref = ir.createBitCast(ref, types.Double.pointerTo(), "slot_f64_ptr"); + this.values.set(inst, ir.createLoad(types.Double, dref, "slot_f64")); + } else { + this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot_val")); + } return; } case "slot_store": { const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); - ir.createStore(this.val(inst.operands[1]), ref); + if (inst.imms["repr"] === "f64") { + const dref = ir.createBitCast(ref, types.Double.pointerTo(), "slot_f64_ptr"); + ir.createStore(this.val(inst.operands[1]), dref); + } else { + ir.createStore(this.val(inst.operands[1]), ref); + } this.values.set(inst, this.val(inst.operands[1])); return; } diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index e2ecfe19..5ed60fe6 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -59,6 +59,9 @@ export type CollectResult = born_shaped: number; ctor_fills: number; fence_declined: Record; + // shapes-plan P4.5: typed (raw f64) slot accesses emitted + typed_loads: number; + typed_stores: number; // Phase 3.6 (null when --types is off or nothing qualified) spec: SpecStats | null; error?: undefined; @@ -74,6 +77,8 @@ export type CollectResult = born_shaped?: undefined; ctor_fills?: undefined; fence_declined?: undefined; + typed_loads?: undefined; + typed_stores?: undefined; spec?: undefined; }; @@ -468,7 +473,8 @@ export function collectEIRToplevel( stats.regions_merged || stats.raw_join_params || stats.shape_guards_folded || - stats.shape_regions_merged + stats.shape_regions_merged || + stats.shape_numeric_merged ) debug.log( 1, @@ -480,7 +486,8 @@ export function collectEIRToplevel( `${stats.regions_merged} region(s) merged, ` + `${stats.raw_join_params} raw f64 join param(s), ` + `${stats.shape_guards_folded} shape guard(s) folded, ` + - `${stats.shape_regions_merged} shape region(s) merged` + `${stats.shape_regions_merged} shape region(s) merged, ` + + `${stats.shape_numeric_merged} shape+numeric region(s) merged` ); verifyModule(eir_module); @@ -536,6 +543,8 @@ export function collectEIRToplevel( born_shaped: typed_stats.born_shaped ?? 0, ctor_fills: typed_stats.ctor_fills ?? 0, fence_declined: typed_stats.fence_declined ?? {}, + typed_loads: typed_stats.typed_loads ?? 0, + typed_stores: typed_stats.typed_stores ?? 0, spec: spec_stats, }; } catch (e) { diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index 16dfec28..f41dbdbe 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -72,6 +72,9 @@ export interface ModCtx { born_shaped?: number; ctor_fills?: number; fence_declined?: Record; + // shapes-plan P4.5: typed (raw f64) slot accesses emitted + typed_loads?: number; + typed_stores?: number; }; // --types-dump: per-site shape census lines (shapes-plan P4.3) shape_dump?: boolean; @@ -948,7 +951,20 @@ class LowerFunction { this.b.setInsertPoint(fast_bb); const v = this.b.emit("slot_load", [obj], { shape: f.key, slot: f.slot, repr: f.repr }); - this.b.br(join_bb, [v]); + if (f.repr === "f64") { + // P4.5 typed slots: the load produces a raw f64 (the guard + // proved the repr; the slot bytes ARE the double). Box once at + // the fast exit — the join stays boxed (its slow edge is the + // generic get), and the optimizer's region fusion + rawJoin + // machinery strips the box wherever the consumer is raw. + v.type = "f64"; + const stats = this.mod_ctx.typed_stats; + if (stats) stats.typed_loads = (stats.typed_loads ?? 0) + 1; + const boxed = this.b.emit("box_f64", [v], {}); + this.b.br(join_bb, [boxed]); + } else { + this.b.br(join_bb, [v]); + } this.b.setInsertPoint(slow_bb); const g = this.b.emit("get_prop_atom", [obj], { atom: atom }); @@ -989,7 +1005,18 @@ class LowerFunction { this.b.sealBlock(slow_bb); this.b.setInsertPoint(fast_bb); - this.b.emit("slot_store", [obj, v], { shape: f.key, slot: f.slot, repr: f.repr }); + if (f.repr === "f64") { + // P4.5 typed slots: unbox under the has_tag guard (the true + // edge into this block proved v is a number, so the bits are + // the double) and store raw — the type system carries the + // repr proof the verifier's store rule now requires. + const raw = this.b.emit("unbox_f64", [v], {}); + this.b.emit("slot_store", [obj, raw], { shape: f.key, slot: f.slot, repr: f.repr }); + const stats = this.mod_ctx.typed_stats; + if (stats) stats.typed_stores = (stats.typed_stores ?? 0) + 1; + } else { + this.b.emit("slot_store", [obj, v], { shape: f.key, slot: f.slot, repr: f.repr }); + } this.b.br(join_bb, []); this.b.setInsertPoint(slow_bb); diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 25f262a6..6b468a48 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -194,18 +194,25 @@ export const OPS = { // fixed-slot access on a shape-guarded receiver. imms.shape/imms.slot // name the guarded shape and the field index within it (the shape imm // repeats the guard's so the verifier compares instead of infers); - // imms.repr is the FIELD's shape repr ("boxed" | "f64"). Round one is - // boxed storage access for both reprs (result/operand are ejsvals); a - // future phase (P4.5) makes repr:"f64" produce/consume raw f64 under - // the P2 typed-flow rules. The verifier requires every slot op to be + // imms.repr is the FIELD's shape repr ("boxed" | "f64"). P4.5 typed + // slots: repr:"f64" produces (slot_load) / consumes (slot_store) a RAW + // f64 under the P2 typed-flow rules — sound because the guard proved + // the field's repr, the shaped-world invariant "shape reprs describe + // slot contents" says an f64 slot holds a number, and the NaN-box + // stores doubles raw, so the 8 bytes at the slot ARE the double. + // slot_load's result type is repr-dependent (f64 for "f64", boxed + // otherwise) — stamped by lowering and re-checked by the verifier, + // the call_typed precedent for typing a per-op table can't express. + // The verifier requires every slot op to be // dominated by an un-killed has_shape fact on the same value for the // same shape (see the effect-kill inventory in verifier.ts) — without // it a stale shape would make the slot addressing itself unsafe (the // storage word is a MAP pointer in dictionary mode). slot_store - // additionally requires a dominating has_tag fact on the stored value - // matching the field repr, so the store provably never needs a repr - // transition (the shaped-world invariant "shape reprs describe slot - // contents" survives compiled stores). + // proves the stored value's repr matches the field: an f64 store takes + // a raw f64 operand (a number by construction — the type system IS the + // proof); a boxed store still requires a dominating has_tag=false fact + // on the stored value, so the store provably never needs a repr + // transition. slot_load: { arity: 1, effects: E.READ, imms: ["shape", "slot", "repr"] }, slot_store: { arity: 2, effects: E.WRITE, imms: ["shape", "slot", "repr"] }, // --- born with their shape (shapes-plan P4.4) ----------------------------- diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index b84dd625..acfd53bb 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -104,7 +104,7 @@ // verifier re-checks all of it (see verifier.ts rawJoin rules). import { Func, Block, Inst } from "./ir"; -import type { Module, Target } from "./ir"; +import type { Module, ShapeField, Target } from "./ir"; import { Effect, opInfo } from "./ops"; import { computeRPO, @@ -1085,6 +1085,35 @@ export function threadBooleanJoins(fn: Func, stats: OptStats): boolean { // - Everything else (j1/j2 pred exactness, pure-prefix cloning, routing // of j1-defined values through j2 with raw-type refusal) is the // numeric merge's argument verbatim. +// +// ---- P4.5 typed slots: the mixed region and the heterogeneous merge ---- +// +// - An f64-repr slot_load produces a raw f64 and lowering boxes it at +// the fast exit, so a shape region's fast side now also carries +// box_f64/unbox_f64 and — after a merge — the f64 arithmetic the +// numeric machinery moved in. The shape matcher therefore admits the +// numeric whitelist in its SLOW chain too (the generic ops are the +// slow rendition of that arithmetic), and the twin check pairs BOTH +// populations: slot_loads with gets (atom == field-at-slot, the P4.3 +// rule) and f64 ops with generic ops (operand correspondence through +// the box/unbox mapping, the numeric rule verbatim). A box_f64 of an +// f64 slot_load corresponds to that load's paired get: the NaN-box +// stores doubles raw, so the get returns bit-for-bit the boxed form +// of the double the load produced. +// - tryMergeShapeNumericAt (the heterogeneous merge): a NUMERIC region +// headed at a shape region's join merges into it — r2's has_tag +// failures reroute to r1's slow entry exactly like a second shape +// region's guard failures would. After the merge r2's head params are +// fed only by r1's fast exits (all box_f64), so foldProvenGuards +// deletes the has_tag and rawJoinParams turns the join raw: the +// region computes unboxed end-to-end, which is the entire point. +// - Re-executing r1's slow chain may now re-run generic arithmetic. +// Sound when each operand is either proven-number at r1's fast exit +// (the numeric merge's rule) or the result of one of r1's own paired +// gets naming an f64-REPR field of the guarded shape: the receiver +// still has shape S (kill-free fast side), an f64-repr slot holds a +// number by the shaped-world invariant, so the get returns a number +// and the generic op is pure and bit-identical to its f64 twin. interface ShapeRegion { head: Block; @@ -1093,11 +1122,13 @@ interface ShapeRegion { fastBlocks: Set; fastChain: Block[]; // linear br chain, entry..exit fastLoads: Inst[]; // slot_loads in chain order + fastArith: Inst[]; // P4.5: f64 arithmetic in chain order (post-merge) fastExitEdge: EdgeRef; slowEntry: Block; slowChain: Block[]; slowSet: Set; slowGets: Inst[]; // get_prop_atom in chain order + slowArith: Inst[]; // P4.5: whitelisted generic ops in chain order slowExitEdge: EdgeRef; join: Block; } @@ -1120,10 +1151,13 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { if (t0.block === slowEntry) return null; // --- slow side: the numeric matcher's linear chain, with - // get_prop_atom(recv) as the whitelisted effectful op + // get_prop_atom(recv) — and, P4.5, the numeric whitelist ops (the + // generic rendition of merged-in f64 arithmetic) — as the admitted + // effectful ops const slowChain: Block[] = []; const slowSet = new Set(); const slowGets: Inst[] = []; + const slowArith: Inst[] = []; let join: Block | null = null; let slowExitEdge: EdgeRef | null = null; let sb = slowEntry; @@ -1140,6 +1174,8 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { if (inst.op === "get_prop_atom") { if (inst.operands[0] !== recv) return null; slowGets.push(inst); + } else if (SLOW_OPS.has(inst.op)) { + slowArith.push(inst); } else if (opInfo(inst.op).effects !== Effect.NONE) { return null; } @@ -1157,6 +1193,15 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { if (bt.operands[0] !== recv) return null; slowGets.push(bt); exit = { inst: bt, targetIndex: 0 }; + } else if ( + SLOW_OPS.has(bt.op) && + bt.targets && + bt.targets.length === 2 && + bt.targets[0]!.kind === "normal" + ) { + // a generic op inside a protected region: [normal, unwind] + slowArith.push(bt); + exit = { inst: bt, targetIndex: 0 }; } else { return null; } @@ -1173,10 +1218,12 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { if (!join || join.isCatch || join === head) return null; // --- fast side: a linear br chain of effect-free-or-GC instructions - // plus slot_loads on exactly (recv, shapeKey) + // plus slot_loads on exactly (recv, shapeKey); f64 arithmetic (an + // earlier heterogeneous merge's residue) is collected for the twin const fastBlocks = new Set(); const fastChain: Block[] = []; const fastLoads: Inst[] = []; + const fastArith: Inst[] = []; let fastExitEdge: EdgeRef | null = null; let fb: Block | null = t0.block; while (fb) { @@ -1194,6 +1241,8 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { if (inst.operands[0] !== recv) return null; if (String(inst.imms["shape"]) !== shapeKey) return null; fastLoads.push(inst); + } else if (F64_TO_GENERIC[inst.op]) { + fastArith.push(inst); } else if ((opInfo(inst.op).effects & ~Effect.GC) !== 0) { return null; } @@ -1223,24 +1272,31 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { fastBlocks, fastChain, fastLoads, + fastArith, fastExitEdge, slowEntry, slowChain, slowSet, slowGets, + slowArith, slowExitEdge: slowExitEdge!, join, }; } // the slow chain is the generic rendition of the fast side: slot_loads and -// gets pair op for op (atom == the shape's field at that slot), and the -// join-exit arguments correspond slot for slot. -function verifyShapeTwin(r: ShapeRegion, shapes: Map): boolean { +// gets pair op for op (atom == the shape's field at that slot), f64 +// arithmetic and generic ops pair op for op with corresponding operands +// (P4.5, the numeric twin rule), and the join-exit arguments correspond +// slot for slot. A box_f64 of an f64 slot_load corresponds to the load's +// paired get: doubles are stored raw in the NaN-box, so the get returns +// exactly the boxed rendition of the load's raw double. +function verifyShapeTwin(r: ShapeRegion, shapes: Map): boolean { const fields = shapes.get(r.shapeKey); if (!fields) return false; if (r.fastLoads.length !== r.slowGets.length) return false; - const pair = new Map(); + if (r.fastArith.length !== r.slowArith.length) return false; + const pair = new Map(); // fast load/arith -> slow twin for (let i = 0; i < r.fastLoads.length; i++) { const load = r.fastLoads[i]!; const get = r.slowGets[i]!; @@ -1250,11 +1306,34 @@ function verifyShapeTwin(r: ShapeRegion, shapes: Map pair.set(load, get); } - // fast value -> the slow value it must equal at the join + // const-correspondence, the numeric merge's Object.is rule, extended + // to the raw form a prior rawJoin conversion mints on fast edges + const corresponds = (want: Inst, actual: Inst): boolean => { + if (want === actual) return true; + if ( + want.op === "const" && + actual.op === "const" && + want.imms["kind"] === actual.imms["kind"] && + Object.is(want.imms["value"], actual.imms["value"]) + ) + return true; + return ( + want.op === "f64_const" && + actual.op === "const" && + actual.imms["kind"] === "number" && + Object.is(want.imms["value"], actual.imms["value"]) + ); + }; + + // fast value -> the slow value it must equal at the join. Boxed and + // raw views recurse into each other through box/unbox exactly as the + // numeric twin's slowOfBoxed/slowOfF64 do, with slot_loads bottoming + // out at their paired gets. const slowOf = (x: Inst, d: number): Inst | null => { if (d <= 0) return null; const p = pair.get(x); if (p) return p; + if (x.op === "box_f64" || x.op === "unbox_f64") return slowOf(x.operands[0]!, d - 1); if (x.op === "blockparam" && x.block && r.fastBlocks.has(x.block)) { const b = x.block; if (b.predEdges.length !== 1) return null; @@ -1265,6 +1344,21 @@ function verifyShapeTwin(r: ShapeRegion, shapes: Map return x; // defined above the head: the same SSA value on both sides }; + // pair the arithmetic in chain order with corresponding operands. + // f64_lt is refused exactly as the numeric twin refuses it (the check + // runs on both sides of a merge, so lt regions simply do not merge). + for (let i = 0; i < r.fastArith.length; i++) { + const fa = r.fastArith[i]!; + const sa = r.slowArith[i]!; + if (fa.op === "f64_lt") return false; + if (F64_TO_GENERIC[fa.op] !== sa.op) return false; + for (let k = 0; k < fa.operands.length; k++) { + const want = slowOf(fa.operands[k]!, 32); + if (!want || !corresponds(want, sa.operands[k]!)) return false; + } + pair.set(fa, sa); + } + const fastArgs = r.fastExitEdge.inst.targets![r.fastExitEdge.targetIndex]!.args; const slowArgs = r.slowExitEdge.inst.targets![r.slowExitEdge.targetIndex]!.args; if (fastArgs.length !== slowArgs.length) return false; @@ -1274,17 +1368,42 @@ function verifyShapeTwin(r: ShapeRegion, shapes: Map if (!fa || !sa) return false; const want = slowOf(fa, 32); if (!want) return false; - if (want !== sa) { - // const-correspondence, the numeric merge's Object.is rule - if ( - !( - want.op === "const" && - sa.op === "const" && - want.imms["kind"] === sa.imms["kind"] && - Object.is(want.imms["value"], sa.imms["value"]) - ) - ) + if (!corresponds(want, sa)) return false; + } + return true; +} + +// Re-executing r1's slow chain (a merged region's guard failures reroute +// through it) is sound when every instruction is effect-free, a get of an +// own field of the guarded shape (pure and bit-identical while the +// receiver still has shape S — the fast side is kill-free), or (P4.5) a +// whitelisted generic op each of whose operands is proven-number at r1's +// fast exit or is one of r1's own paired gets naming an f64-REPR field — +// an f64 slot holds a number by the shaped-world invariant, so the +// re-executed generic op is pure and bit-identical to its f64 twin. +function checkShapeSlowReexec( + r1: ShapeRegion, + fields: ShapeField[], + idom: Map +): boolean { + const fastExitBlock = r1.fastExitEdge.inst.block!; + const numberOk = (o: Inst): boolean => { + if (provenNumberAt(o, fastExitBlock, idom)) return true; + if (o.op !== "get_prop_atom" || !r1.slowGets.includes(o)) return false; + const f = fields.find((f) => f.name === o.imms["atom"]); + return f !== undefined && f.repr === "f64"; + }; + for (const sb of r1.slowChain) { + for (const inst of sb.insts) { + if (inst.op === "br") continue; + if (inst.op === "get_prop_atom") { + if (inst.operands[0] !== r1.recv) return false; + if (!fields.some((f) => f.name === inst.imms["atom"])) return false; + } else if (SLOW_OPS.has(inst.op)) { + for (const o of inst.operands) if (!numberOk(o)) return false; + } else if (opInfo(inst.op).effects !== Effect.NONE) { return false; + } } } return true; @@ -1294,7 +1413,7 @@ function verifyShapeTwin(r: ShapeRegion, shapes: Map // precede all mutations — the numeric tryMergeAt transplanted. function tryMergeShapeAt( fn: Func, - shapes: Map, + shapes: Map, r1: ShapeRegion, idom: Map, stats: OptStats @@ -1355,23 +1474,174 @@ function tryMergeShapeAt( } // re-execution check: region2's guard failures re-run r1's slow chain - // after r1's fast side ran. Sound iff every re-executed instruction is - // effect-free or a get of an OWN field of the guarded shape (pure and - // value-identical while the receiver still has shape S — which it does: - // the fast side and prefix are kill-free by the region match). + // after r1's fast side ran (see checkShapeSlowReexec's argument) const fields = shapes.get(r1.shapeKey)!; - for (const sb of r1.slowChain) { - for (const inst of sb.insts) { - if (inst.op === "br") continue; - if (inst.op === "get_prop_atom") { - if (inst.operands[0] !== r1.recv) return false; - if (!fields.some((f) => f.name === inst.imms["atom"])) return false; - } else if (opInfo(inst.op).effects !== Effect.NONE) { - return false; + if (!checkShapeSlowReexec(r1, fields, idom)) return false; + + // what the slow path knows each j1-defined value to be + const slowMap = new Map(); + const exitTarget = r1.slowExitEdge.inst.targets![r1.slowExitEdge.targetIndex]!; + for (const p of j1.params) { + const arg = exitTarget.args[j1.argIndexOfParam(p)]; + if (!arg) return false; + slowMap.set(p, arg); + } + + // routing pre-check (numeric merge verbatim): every use of a + // j1-defined value outside region2 must be dominated by j2 + const routed: Inst[] = [...j1.params, ...prefix]; + const outsideUses = new Map(); + for (const v of routed) { + const outs: Inst[] = []; + let ok = true; + fn.forEachInst((inst, blk) => { + if (!ok) return; + let uses = false; + for (const o of inst.operands) if (o === v) uses = true; + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a === v) uses = true; + if (!uses) return; + if (blk === j1 || r2.fastBlocks.has(blk)) return; + if (r2.slowSet.has(blk)) return; // substituted below + if (!dominates(idom, j2, blk)) { + ok = false; + return; } + outs.push(inst); + }); + if (!ok) return false; + if (outs.length > 0) { + if (v.type !== "any") return false; // no raw-typed routing + outsideUses.set(v, outs); } } + // ---- all checks passed; mutate ---- + const mapSlow = (v: Inst): Inst => slowMap.get(v) ?? v; + + const slowExitBlock = r1.slowChain[r1.slowChain.length - 1]!; + const exitInst = r1.slowExitEdge.inst; + for (const q of prefix) { + const clone = new Inst(fn, q.op, q.operands.map(mapSlow), { ...q.imms }); + clone.block = slowExitBlock; + slowExitBlock.insts.splice(slowExitBlock.insts.indexOf(exitInst), 0, clone); + slowMap.set(q, clone); + } + + retargetEdge(exitInst, r1.slowExitEdge.targetIndex, r2.slowEntry, []); + retargetEdge(r2.head.terminator!, 1, r1.slowEntry, []); + for (const sb of r2.slowChain) { + for (const inst of sb.insts) { + for (let i = 0; i < inst.operands.length; i++) + inst.operands[i] = mapSlow(inst.operands[i]!); + if (inst.targets) + for (const t of inst.targets) + for (let i = 0; i < t.args.length; i++) + if (t.args[i]) t.args[i] = mapSlow(t.args[i]!); + } + } + + for (const entry of outsideUses.entries()) { + const v = entry[0]; + const users = entry[1]; + const vr = j2.addParam(v.nameHint); + vr.type = v.type; + const slot = j2.argIndexOfParam(vr); + for (const e of j2.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + t.args[slot] = r2.slowSet.has(e.inst.block!) ? mapSlow(v) : v; + } + for (const u of users) { + for (let i = 0; i < u.operands.length; i++) if (u.operands[i] === v) u.operands[i] = vr; + if (u.targets) + for (const t of u.targets) + for (let i = 0; i < t.args.length; i++) if (t.args[i] === v) t.args[i] = vr; + } + } + + stats.shape_regions_merged++; + return true; +} + +// P4.5: the heterogeneous merge — a NUMERIC guard region headed at a +// shape region's join merges into the shape region, exactly as a second +// shape region would: r2's has_tag failures reroute to r1's slow entry +// (r1's slow chain re-executes — checkShapeSlowReexec — then falls +// through into r2's slow chain, the full generic computation in program +// order). After the merge r2's head params are fed only by r1's fast +// exits, so foldProvenGuards deletes the has_tag and rawJoinParams turns +// the join raw — the region computes unboxed end-to-end. All checks +// precede all mutations; the check set is tryMergeAt's with r1's side +// verified by the mixed shape twin. +function tryMergeShapeNumericAt( + fn: Func, + shapes: Map, + r1: ShapeRegion, + idom: Map, + stats: OptStats +): boolean { + const j1 = r1.join; + const r2 = matchRegionAt(j1); + if (!r2) return false; + const j2 = r2.join; + + // region2 strictly below region1 (no sharing, no cycles) + if (j2 === r1.head || j2 === j1 || r1.fastBlocks.has(j2) || r1.slowSet.has(j2)) return false; + if (r2.slowEntry === r1.slowEntry) return false; + for (const b of r2.fastBlocks) + if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + for (const b of r2.slowChain) + if (r1.fastBlocks.has(b) || r1.slowSet.has(b) || b === r1.head) return false; + + // j1's predecessors must be exactly region1's exits, j2's exactly + // region2's (the numeric merge's review attack A) + for (const e of j1.predEdges) { + const src = e.inst.block!; + if (!r1.fastBlocks.has(src) && !r1.slowSet.has(src)) return false; + } + for (const e of j2.predEdges) { + const src = e.inst.block!; + if (!r2.fastBlocks.has(src) && !r2.slowSet.has(src)) return false; + } + + // both slow chains must be their fast sides' generic twins: r2 by the + // numeric rule, r1 by the mixed shape rule + if (!verifyGenericTwin(r2)) return false; + if (!verifyShapeTwin(r1, shapes)) return false; + + // j1's instruction shape: [effect-free prefix..., (guard,) cond_br]. + // The numeric prefix logic verbatim — a has_tag guard is a fact about + // an immutable SSA value, so unlike has_shape it need not be j1's own + // fresh compare. + const term = j1.terminator!; + const guard = term.operands[0]!; + let prefixEnd = j1.insts.length - 1; + if (guard.block === j1) { + if (j1.insts[j1.insts.length - 2] !== guard) return false; + prefixEnd = j1.insts.length - 2; + let extraUse = false; + fn.forEachInst((inst) => { + if (inst === term) return; + for (const o of inst.operands) if (o === guard) extraUse = true; + if (inst.targets) + for (const t of inst.targets) for (const a of t.args) if (a === guard) extraUse = true; + }); + if (extraUse) return false; + } + const prefix: Inst[] = []; + for (let i = 0; i < prefixEnd; i++) { + const q = j1.insts[i]!; + if (q.targets && q.targets.length > 0) return false; + if (opInfo(q.op).effects !== Effect.NONE) return false; + prefix.push(q); + } + + // re-execution check: r2's guard failures re-run r1's slow chain + // after r1's fast side ran (see checkShapeSlowReexec's argument) + const fields = shapes.get(r1.shapeKey); + if (!fields) return false; + if (!checkShapeSlowReexec(r1, fields, idom)) return false; + // what the slow path knows each j1-defined value to be const slowMap = new Map(); const exitTarget = r1.slowExitEdge.inst.targets![r1.slowExitEdge.targetIndex]!; @@ -1423,7 +1693,7 @@ function tryMergeShapeAt( } retargetEdge(exitInst, r1.slowExitEdge.targetIndex, r2.slowEntry, []); - retargetEdge(r2.head.terminator!, 1, r1.slowEntry, []); + for (const ge of r2.guardFalseEdges) retargetEdge(ge.inst, ge.targetIndex, r1.slowEntry, []); for (const sb of r2.slowChain) { for (const inst of sb.insts) { for (let i = 0; i < inst.operands.length; i++) @@ -1453,7 +1723,7 @@ function tryMergeShapeAt( } } - stats.shape_regions_merged++; + stats.shape_numeric_merged++; return true; } @@ -1508,6 +1778,11 @@ export function optimizeShapeRegions( sweepUnreachableBlocks(fn); + // P4.5 bisect hook (criterion 6): EJS_NO_SHAPE_FUSION disables the + // heterogeneous merge + the in-loop numeric folding, leaving exactly + // the P4.3 shape-region behavior (typed slot ACCESS is a contract + // change and has no off switch — the verifier owns it). + const noFusion = !!process.env["EJS_NO_SHAPE_FUSION"]; let changedAny = false; for (let round = 0; round < 50; round++) { let changed = false; @@ -1519,7 +1794,10 @@ export function optimizeShapeRegions( for (const b of rpo) { const r1 = matchShapeRegionAt(b); if (!r1) continue; - if (tryMergeShapeAt(fn, module.shapes, r1, idom, stats)) { + if ( + tryMergeShapeAt(fn, module.shapes, r1, idom, stats) || + (!noFusion && tryMergeShapeNumericAt(fn, module.shapes, r1, idom, stats)) + ) { merged = true; changed = true; break; // mutations invalidate matches; re-match @@ -1529,6 +1807,11 @@ export function optimizeShapeRegions( } } if (foldProvenShapeGuards(fn, stats)) changed = true; + // P4.5: a heterogeneous merge leaves r2's has_tag guards fed only + // by fast-side box_f64 values — provably numbers. Folding them + // here linearizes the fast side so the NEXT round's matcher can + // grow the region further (the fusion cascade). + if (!noFusion && foldProvenGuards(fn, stats)) changed = true; if (!changed) break; sweepUnreachableBlocks(fn); changedAny = true; diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 60f76763..53f8f048 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -42,6 +42,8 @@ export interface OptStats { // shapes-plan P4.3: shape-guard region passes shape_guards_folded: number; shape_regions_merged: number; + // shapes-plan P4.5: heterogeneous (shape + numeric) region merges + shape_numeric_merged: number; // Phase 3.6: unbox_f64(box_f64(x)) round-trips annihilated unbox_folds: number; // Phase 3.6: constant edges threaded past boxed-boolean re-tests @@ -60,6 +62,7 @@ function newStats(): OptStats { raw_join_params: 0, shape_guards_folded: 0, shape_regions_merged: 0, + shape_numeric_merged: 0, unbox_folds: 0, joins_threaded: 0, }; @@ -678,9 +681,22 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O // emitted no number guards — every flag-off compile. if (optimizeGuardRegions(fn, s)) eliminateDead(fn, s); // shapes-plan P4.3: shape-guard region merging + fact folding (bails - // immediately without has_shape guards — every flag-off compile) - if (optimizeShapeRegions(fn, module, s)) eliminateDead(fn, s); - if (rawJoinParams(fn, s)) eliminateDead(fn, s); + // immediately without has_shape guards — every flag-off compile). + // P4.5: a short fixpoint with rawJoinParams — heterogeneous merges + // expose raw joins, and a raw join linearizes a fast side the next + // shape-region match can grow through. + for (let i = 0; i < 8; i++) { + let ch = false; + if (optimizeShapeRegions(fn, module, s)) { + eliminateDead(fn, s); + ch = true; + } + if (rawJoinParams(fn, s)) { + eliminateDead(fn, s); + ch = true; + } + if (!ch) break; + } // Phase 3.6 cleanups. These run AFTER the guard-region passes: the // merge machinery pattern-matches diamond fast arms (unbox of the // guarded value / of a literal const), so annihilating round-trips diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 08f85651..4d018de0 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -2102,9 +2102,12 @@ interface SlotAttackOpts { guarded?: boolean; // guard the slot op with has_shape (default true) killInFast?: boolean; // a call between the guard and the slot op store?: boolean; // slot_store instead of slot_load + storeRaw?: boolean; // unbox the stored value (the P4.5 typed store form) tagGuard?: "none" | "true" | "false"; // has_tag fact for the stored value slot?: number; repr?: string; + boxedField?: boolean; // shape's x field is boxed (for boxed-store rules) + loadType?: string; // override the slot_load result stamp (attack) shapeImm?: string; // override the op's shape imm } @@ -2114,8 +2117,9 @@ function buildSlotAttack(o: SlotAttackOpts): { mod: Module; fn: Func } { const fb = new FunctionBuilder("attack", ["%env", "%this", "p", "v"]); const p = fb.fn.entry!.params[2]!; const v = fb.fn.entry!.params[3]!; - const shapeKey = "x:f64,y:f64"; + const shapeKey = o.boxedField ? "x:boxed,y:f64" : "x:f64,y:f64"; const opShape = o.shapeImm ?? shapeKey; + const repr = o.repr ?? (o.boxedField ? "boxed" : "f64"); const fast = fb.newBlock("fast"); const slow = fb.newBlock("slow"); @@ -2145,20 +2149,27 @@ function buildSlotAttack(o: SlotAttackOpts): { mod: Module; fn: Func } { fb.br(join, [fb.constUndefined()]); fb.setInsertPoint(tagok); } + if (o.storeRaw) stored = fb.emit("unbox_f64", [stored], {}); let fastv: Inst; - if (o.store) + if (o.store) { fastv = fb.emit("slot_store", [p, stored], { shape: opShape, slot: o.slot ?? 0, - repr: o.repr ?? "f64", + repr: repr, }); - else + fb.br(join, [fb.constUndefined()]); + } else { fastv = fb.emit("slot_load", [p], { shape: opShape, slot: o.slot ?? 0, - repr: o.repr ?? "f64", + repr: repr, }); - fb.br(join, [fastv]); + // P4.5: an f64-repr load produces a raw f64 (stamped by lowering) + // and boxes at the fast exit; loadType overrides for attack IR + fastv.type = o.loadType ?? (repr === "f64" ? "f64" : "any"); + if (fastv.type === "f64") fastv = fb.emit("box_f64", [fastv], {}); + fb.br(join, [fastv]); + } fb.setInsertPoint(slow); const g = fb.emit("get_prop_atom", [p], { atom: "x" }); @@ -2172,7 +2183,7 @@ function buildSlotAttack(o: SlotAttackOpts): { mod: Module; fn: Func } { const mod = new Module("attack_mod"); mod.addFunction(fn); mod.internShape([ - { name: "x", repr: "f64" }, + { name: "x", repr: o.boxedField ? "boxed" : "f64" }, { name: "y", repr: "f64" }, ]); return { mod, fn }; @@ -2202,19 +2213,52 @@ test("shapes-verify: slot out of bounds / repr mismatch / unknown shape reject", ); }); -test("shapes-verify: slot_store requires the matching has_tag fact", () => { - // no tag fact at all +test("shapes-verify: slot_store repr proofs — typed f64, tagged boxed", () => { + // P4.5: an f64 store takes a raw f64 — the type system IS the proof; + // no has_tag fact anywhere and it still verifies + verifyModule(buildSlotAttack({ store: true, storeRaw: true }).mod); + // a BOXED value into an f64 slot is a type error, has_tag fact or not + assertThrows( + () => verifyModule(buildSlotAttack({ store: true }).mod), + "raw f64" + ); + assertThrows( + () => verifyModule(buildSlotAttack({ store: true, tagGuard: "true" }).mod), + "raw f64" + ); + // a boxed-repr store still requires the has_tag=false fact + verifyModule(buildSlotAttack({ store: true, boxedField: true, tagGuard: "false" }).mod); assertThrows( - () => verifyModule(buildSlotAttack({ store: true, tagGuard: "none" }).mod), + () => verifyModule(buildSlotAttack({ store: true, boxedField: true, tagGuard: "none" }).mod), "has_tag" ); - // the right fact verifies - verifyModule(buildSlotAttack({ store: true, tagGuard: "true" }).mod); - // the WRONG edge's fact (value proven NON-number, field repr f64) rejects + // the WRONG edge's fact (value proven number, field repr boxed) rejects assertThrows( - () => verifyModule(buildSlotAttack({ store: true, tagGuard: "false" }).mod), + () => verifyModule(buildSlotAttack({ store: true, boxedField: true, tagGuard: "true" }).mod), "has_tag" ); + // a raw f64 into a BOXED slot is a type error + assertThrows( + () => + verifyModule( + buildSlotAttack({ store: true, boxedField: true, storeRaw: true }).mod + ), + "boxed value" + ); +}); + +test("shapes-verify: slot_load result stamp must match its repr", () => { + // an f64-repr load left stamped "any" is rejected (the P4.3 boxed + // form no longer verifies)... + assertThrows( + () => verifyModule(buildSlotAttack({ loadType: "any" }).mod), + "must have type f64" + ); + // ...and a boxed-repr load stamped f64 likewise + assertThrows( + () => verifyModule(buildSlotAttack({ boxedField: true, loadType: "f64" }).mod), + "must have type any" + ); }); // --- shapes: optimizer (merging + fact folding) ---------------------------------- @@ -2231,6 +2275,7 @@ function shapeOptStats(): OptStats { raw_join_params: 0, shape_guards_folded: 0, shape_regions_merged: 0, + shape_numeric_merged: 0, unbox_folds: 0, joins_threaded: 0, }; @@ -2289,7 +2334,8 @@ function buildTwinAttack(lieAtom: string): { mod: Module; fn: Func; stats: OptSt fb.sealBlock(slow1); fb.setInsertPoint(fast1); const l1 = fb.emit("slot_load", [p], { shape: shapeKey, slot: 0, repr: "f64" }); - fb.br(j1, [l1]); + l1.type = "f64"; + fb.br(j1, [fb.emit("box_f64", [l1], {})]); fb.setInsertPoint(slow1); const gp1 = fb.emit("get_prop_atom", [p], { atom: "x" }); fb.br(j1, [gp1]); @@ -2306,7 +2352,8 @@ function buildTwinAttack(lieAtom: string): { mod: Module; fn: Func; stats: OptSt fb.sealBlock(slow2); fb.setInsertPoint(fast2); const l2 = fb.emit("slot_load", [p], { shape: shapeKey, slot: 0, repr: "f64" }); - fb.br(j2, [l2]); + l2.type = "f64"; + fb.br(j2, [fb.emit("box_f64", [l2], {})]); fb.setInsertPoint(slow2); const gp2 = fb.emit("get_prop_atom", [p], { atom: lieAtom }); fb.br(j2, [gp2]); @@ -2410,6 +2457,132 @@ test("shapes-opt: a stale (earlier-block) has_shape compare never folds", () => verifyModule(mod2); }); +// --- shapes-plan P4.5: typed slots + heterogeneous fusion ------------------------ + +test("shapes-typed: f64 loads are raw + boxed at the exit; stores unbox", () => { + const g = lowerWithOracle("function f(p) { return p.x; }", stubShapeOracle({ p: PXY })); + assertContains(g.printed, ": f64 = slot_load"); + assertContains(g.printed, "box_f64"); + const s = lowerWithOracle("function f(p, v) { p.x = v; }", stubShapeOracle({ p: PXY })); + assertContains(s.printed, "unbox_f64"); + // boxed fields keep boxed access — no raw traffic anywhere + const b = lowerWithOracle("function f(p) { return p.s; }", stubShapeOracle({ p: PXY })); + assertNotContains(b.printed, "box_f64"); + assertNotContains(b.printed, ": f64 = slot_load"); +}); + +test("shapes-typed: shape and numeric regions fuse unboxed end-to-end", () => { + // the real oracle types f64-field member reads as {number}, which is + // what makes lowering wrap the arithmetic in numeric diamonds — the + // stub must too, or there is no numeric region to fuse + const oracle: TypeOracle = { + ...stubShapeOracle({ p: PXY }), + typeOfNode: (n) => { + const t = (n as { type?: string }).type; + return t === "MemberExpression" ? { tags: new Set(["number"]) } : { tags: "top" }; + }, + }; + const r = lowerFunctionNode( + parseFn("function f(p) { return p.x * p.x + p.y * p.y; }"), + undefined, + oracle + ); + verifyModule(r.module); + const stats = optimizeFunction(r.fn, r.module); + verifyModule(r.module); + const printed = printFunction(r.fn); + assert(stats.shape_numeric_merged >= 2, `het merges=${stats.shape_numeric_merged}`); + assert(stats.shape_regions_merged >= 2, `shape merges=${stats.shape_regions_merged}`); + const guards = (printed.match(/has_shape/g) || []).length; + assert(guards === 1, `expected 1 surviving has_shape, got ${guards}`); + const tags = (printed.match(/has_tag/g) || []).length; + assert(tags === 0, `expected every has_tag folded, got ${tags}`); + const rawLoads = (printed.match(/: f64 = slot_load/g) || []).length; + assert(rawLoads === 4, `expected 4 raw slot_loads, got ${rawLoads}`); + assert(stats.raw_join_params >= 2, `raw join params=${stats.raw_join_params}`); +}); + +// re-execution attack: region1's slow chain holds a generic mul fed by a +// get of a BOXED-repr field — re-running it after the fast side is not +// provably pure, so any merge below must refuse. The identical CFG with +// the field repr'd f64 is the control: it must merge. +function buildReexecAttack(sRepr: "boxed" | "f64"): OptStats { + const shapeKey = `x:f64,s:${sRepr}`; + const fb = new FunctionBuilder("reexec", ["%env", "%this", "p"]); + const p = fb.fn.entry!.params[2]!; + + const fast1 = fb.newBlock("fast1"); + const slow1 = fb.newBlock("slow1"); + const j1 = fb.newBlock("j1"); + const v1 = j1.addParam("v1"); + const g1 = fb.emit("has_shape", [p], { shape: shapeKey }); + fb.condBr(g1, fast1, [], slow1, []); + fb.sealBlock(fast1); + fb.sealBlock(slow1); + fb.setInsertPoint(fast1); + const lx = fb.emit("slot_load", [p], { shape: shapeKey, slot: 0, repr: "f64" }); + lx.type = "f64"; + const ls = fb.emit("slot_load", [p], { shape: shapeKey, slot: 1, repr: sRepr }); + let sraw: Inst; + if (sRepr === "boxed") { + sraw = fb.emit("unbox_f64", [ls], {}); + } else { + ls.type = "f64"; + sraw = ls; + } + const m = fb.emit("f64_mul", [lx, sraw], {}); + fb.br(j1, [fb.emit("box_f64", [m], {})]); + fb.setInsertPoint(slow1); + const gx = fb.emit("get_prop_atom", [p], { atom: "x" }); + const gs = fb.emit("get_prop_atom", [p], { atom: "s" }); + const mslow = fb.emit("mul", [gx, gs], {}); + fb.br(j1, [mslow]); + fb.sealBlock(j1); + fb.setInsertPoint(j1); + + const fast2 = fb.newBlock("fast2"); + const slow2 = fb.newBlock("slow2"); + const j2 = fb.newBlock("j2"); + const v2 = j2.addParam("v2"); + const g2 = fb.emit("has_shape", [p], { shape: shapeKey }); + fb.condBr(g2, fast2, [], slow2, []); + fb.sealBlock(fast2); + fb.sealBlock(slow2); + fb.setInsertPoint(fast2); + const l2 = fb.emit("slot_load", [p], { shape: shapeKey, slot: 0, repr: "f64" }); + l2.type = "f64"; + fb.br(j2, [fb.emit("box_f64", [l2], {})]); + fb.setInsertPoint(slow2); + const g2x = fb.emit("get_prop_atom", [p], { atom: "x" }); + fb.br(j2, [g2x]); + fb.sealBlock(j2); + fb.setInsertPoint(j2); + fb.ret(fb.emit("add", [v1, v2], {})); + + const fn = fb.finish(); + const mod = new Module("reexec_mod"); + mod.addFunction(fn); + mod.internShape([ + { name: "x", repr: "f64" }, + { name: "s", repr: sRepr }, + ]); + verifyModule(mod); + const stats = shapeOptStats(); + optimizeShapeRegions(fn, mod, stats); + verifyModule(mod); + return stats; +} + +test("shapes-typed: a boxed-field get feeding slow arithmetic refuses re-execution", () => { + const refused = buildReexecAttack("boxed"); + assert( + refused.shape_regions_merged === 0 && refused.shape_numeric_merged === 0, + "boxed-fed slow arithmetic must refuse the merge" + ); + const control = buildReexecAttack("f64"); + assert(control.shape_regions_merged === 1, "the f64-repr control must merge"); +}); + // --- shapes-plan P4.4: born with their shape ----------------------------------- test("born-shaped: a static literal lowers to make_object_shaped under --types", () => { @@ -2629,11 +2802,15 @@ test("born-verify: make_object_shaped checks field count and known shape", () => assertThrows(() => verifyModule(mod2), "unknown module shape"); }); -// the optimizer/verifier proof-strength pin (found by +// the P4.3-era optimizer/verifier proof-strength hazard (found by // types-bornshapewrong1): foldProvenGuards deletes a has_tag over a -// const-number join (`c ? 1 : 0`), so the verifier's intrinsic proof must -// accept the join param for the slot_store it uncovers -function buildConstJoinStore(nonNumberEdge: boolean): Module { +// const-number join (`c ? 1 : 0`), uncovering the slot_store. P4.5's +// typed store dissolves the hazard class: the store takes a raw f64 +// (unbox under whatever proof lowering had), so no guard deletion can +// ever strip the proof — the TYPE is the proof. Pin both directions: +// the raw form verifies with no has_tag anywhere, the boxed form is +// rejected by type no matter what the join's edges carry. +function buildConstJoinStore(nonNumberEdge: boolean, raw = false): Module { const fb = new FunctionBuilder("cjstore", ["%env", "%this", "p", "c"]); const p = fb.fn.entry!.params[2]!; const c = fb.fn.entry!.params[3]!; @@ -2658,8 +2835,9 @@ function buildConstJoinStore(nonNumberEdge: boolean): Module { fb.condBr(g, fast, [], out, []); fb.sealBlock(fast); fb.setInsertPoint(fast); - // no has_tag: the store's number proof is the const join itself - fb.emit("slot_store", [p, v], { shape: shapeKey, slot: 0, repr: "f64" }); + // no has_tag anywhere: the raw form's proof is the operand type + const stored = raw ? fb.emit("unbox_f64", [v], {}) : v; + fb.emit("slot_store", [p, stored], { shape: shapeKey, slot: 0, repr: "f64" }); fb.br(out, []); fb.sealBlock(out); fb.setInsertPoint(out); @@ -2673,12 +2851,14 @@ function buildConstJoinStore(nonNumberEdge: boolean): Module { return mod; } -test("born-verify: a const-number join proves an f64 store without has_tag", () => { - verifyModule(buildConstJoinStore(false)); +test("born-verify: a typed f64 store needs no has_tag, whatever the join", () => { + verifyModule(buildConstJoinStore(false, true)); + verifyModule(buildConstJoinStore(true, true)); }); -test("born-verify: a join with a non-number edge still requires has_tag", () => { - assertThrows(() => verifyModule(buildConstJoinStore(true)), "has_tag"); +test("born-verify: a boxed value into an f64 slot rejects by type", () => { + assertThrows(() => verifyModule(buildConstJoinStore(false)), "raw f64"); + assertThrows(() => verifyModule(buildConstJoinStore(true)), "raw f64"); }); // -------------------------------------------------------------------------------- diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index 9bf6883a..06ecb07f 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -46,10 +46,14 @@ import type { Func, Block, Inst, Module } from "./ir"; // heap side (the object's header) can move, which is exactly what the // kill rule tracks. // -// Number-tag facts (slot_store's repr proof) need no kill rule: has_tag -// tests the VALUE's own tag, and SSA values are immutable — dominance -// alone suffices (tagFactDominates below, the guardFactAt shape from -// optimize-guards generalized to either edge). +// Number-tag facts (the BOXED slot_store's repr proof) need no kill rule: +// has_tag tests the VALUE's own tag, and SSA values are immutable — +// dominance alone suffices (tagFactDominates below, the guardFactAt shape +// from optimize-guards generalized to either edge). P4.5 typed slots: an +// f64-repr store takes a raw f64 operand, so its repr proof is the type +// system itself (a raw f64 is a number by construction) — the has_tag +// dominance requirement, and the provenNumberIntrinsic escape hatch that +// mirrored optimizer folds over it, are gone with the boxed f64 store. // // The engine is shared with optimize-guards' shape-fact folding: the // optimizer folds on the same facts the verifier re-derives, so a fold the @@ -153,48 +157,6 @@ export function computeShapeFacts(fn: Func): ShapeFactAnalysis | null { }; } -// value-intrinsic number proof: numbers by construction, no position -// involved. The optimizer's foldProvenGuards legitimately deletes a -// has_tag whose value is proven this way (const numbers, box_f64, the -// always-number generic ops — optimize-guards' soundness inventory), so -// the slot_store rule must accept the same proofs or reject valid folds. -// Deliberately the INTRINSIC subset only: the optimizer's dominance-fact -// proofs never justify deleting a guard the store rule needs (a fold on a -// dominance fact leaves that dominating guard edge in place). -export function provenNumberIntrinsic(v: Inst, depth = 6): boolean { - if (v.op === "const") return v.imms["kind"] === "number"; - if (v.op === "box_f64") return true; - if (v.op === "mul" || v.op === "div" || v.op === "sub") return true; - if (depth <= 0) return false; - if (v.op === "add") - return ( - provenNumberIntrinsic(v.operands[0]!, depth - 1) && - provenNumberIntrinsic(v.operands[1]!, depth - 1) - ); - // a join whose every incoming is itself intrinsically a number (e.g. - // `c ? 1 : 0` — const-number edges) is immutably a number. This - // mirrors provenNumberAt's blockparam case in optimize-guards: the - // optimizer folds a has_tag over such a join, so the verifier must - // accept the same proof for the slot_store it uncovers (the P4.2 - // proof-mismatch lesson, replayed — found by types-bornshapewrong1's - // ternary-valued constructor store). - if (v.op === "blockparam" && !v.isException && v.block && !v.block.isCatch) { - const b = v.block; - if (b.predEdges.length === 0) return false; - const argIdx = b.argIndexOfParam(v); - let anyProven = false; - for (const e of b.predEdges) { - const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; - if (!arg) return false; - if (arg === v) continue; // self-edge: vacuous - if (!provenNumberIntrinsic(arg, depth - 1)) return false; - anyProven = true; - } - return anyProven; - } - return false; -} - // is there a dominating (wantTrue ? true : false)-edge fact of // `has_tag(v, "number")` at `block`? Dominance-only: number-ness of an // immutable SSA value is position-independent (see the inventory above). @@ -527,6 +489,24 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { }); continue; } + // P4.5 typed slots: slot ops are typed by their repr immediate, + // which a per-op table can't express (the call_typed precedent). + // The receiver is always boxed; an f64-repr store takes exactly + // a raw f64 (the type system IS the repr proof), a boxed-repr + // store takes a boxed value. slot_load's result stamp is + // checked against the repr in the shape section below. + if (inst.op === "slot_store") { + if (isRaw(inst.operands[0]!.type)) + fail(`slot_store receiver must be boxed, got ${inst.operands[0]!.type}`, inst); + const v = inst.operands[1]!; + if (inst.imms["repr"] === "f64") { + if (v.type !== "f64") + fail(`slot_store repr "f64" wants a raw f64 value, got ${v.type}`, inst); + } else if (isRaw(v.type)) { + fail(`slot_store repr "boxed" wants a boxed value, got ${v.type}`, inst); + } + continue; + } // Phase 3.6: a sigged function's `return` must produce exactly // the sig's result type (f64 result -> raw f64 operand) if (inst.op === "return" && fn.sig && fn.sig.result === "f64") { @@ -556,8 +536,11 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { // --- shapes-plan P4.3: shape-guarded slot access ----------------------- // Every slot op must sit under an un-killed dominating has_shape fact on // the same value for the same shape (see the effect-kill inventory at the - // top of this file); stores additionally prove the stored value's tag - // matches the field repr, so compiled stores never owe a transition. + // top of this file); stores additionally prove the stored value's repr + // matches the field's — by TYPE for f64 (the typed-flow rule above), by + // a has_tag=false dominance fact for boxed — so compiled stores never + // owe a transition. P4.5: slot_load's result stamp must agree with its + // repr (raw f64 loads are only meaningful under the guard's repr proof). // With a module in hand, imms are checked against the module shape table // (bounds, repr identity, known key). let shapeFacts: ShapeFactAnalysis | null | undefined; @@ -609,6 +592,11 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { fail(`'${inst.op}' has a malformed slot immediate`, inst); if (repr !== "boxed" && repr !== "f64") fail(`'${inst.op}' has a malformed repr immediate`, inst); + if (inst.op === "slot_load") { + const want = repr === "f64" ? "f64" : "any"; + if (inst.type !== want) + fail(`slot_load repr "${String(repr)}" must have type ${want}, got ${inst.type}`, inst); + } if (fields) { if ((slot as number) >= fields.length) fail( @@ -630,16 +618,14 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { inst ); - if (inst.op === "slot_store") { + if (inst.op === "slot_store" && repr === "boxed") { + // the f64 case is the typed-flow rule above (raw f64 + // operand); boxed still needs the not-a-number proof const val = inst.operands[1]!; - const proven = - repr === "f64" - ? tagFactDominates(val, true, b, idom) || provenNumberIntrinsic(val) - : tagFactDominates(val, false, b, idom); - if (!proven) + if (!tagFactDominates(val, false, b, idom)) fail( - `slot_store lacks a dominating has_tag(number)=${repr === "f64"} fact ` + - `on its value for repr "${String(repr)}"`, + `slot_store lacks a dominating has_tag(number)=false fact ` + + `on its value for repr "boxed"`, inst ); } diff --git a/test/types/README.md b/test/types/README.md index 0af5b968..c70c5096 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -37,7 +37,8 @@ counts has_shape diamonds the way `diamonds=N` counts has_tag ones): | types-bench2 | the object-model microbenchmark: monomorphic constructor + p.x/p.y kernel; guarded fast paths + shape-region merging (`shapeGuards=10`, 2 shape regions merged); 2026-07-24 numbers: --types 3.06s vs flag-off 6.56s (2.1×), vs EJS_SHAPES=off 5.82s (~1.9× shapes-attributable); P4.4 born-with-shape (`ctorFills=1`) takes it to **2.03s** vs flag-off 6.76s (3.3×) | 10 | match | | types-shapeswrong1 | the wrong-oracle shape guard: lib types sumxy's receiver {x: num, y: num} from its one local call; main hands it a repr-mismatched object ("ab"), an extra-field object, and a dictionary-mode (post-delete) object → all route slow with node-identical values; the matching Point goes fast | 4 (in lib) | n/a¹ | | types-bornshape1 | born-with-shape (P4.4): a static literal is make_object_shaped, the Pt ctor prefix is the empty-shape-guarded fill (`bornShaped=1 ctorFills=1`); keys order, `in`, growth past the born shape, and a repr-differing construction all match node | 0 | match | -| types-bornshapewrong1 | P4.4 edge cases: a reused non-empty receiver (guard fails), an `in`-cut fence, a frozen receiver (runtime re-check), a proto-chain SETTER intercepting the batched store, and a non-writable proto data prop — every one routes sequential with node-identical output (`bornShaped=3 ctorFills=3 fenceDeclined=short-prefix:1`); also found the provenNumberIntrinsic const-join gap (see verifier.ts) | 0 | match | +| types-bornshapewrong1 | P4.4 edge cases: a reused non-empty receiver (guard fails), an `in`-cut fence, a frozen receiver (runtime re-check), a proto-chain SETTER intercepting the batched store, and a non-writable proto data prop — every one routes sequential with node-identical output (`bornShaped=3 ctorFills=3 fenceDeclined=short-prefix:1`); also found the provenNumberIntrinsic const-join gap (which P4.5's typed stores later dissolved entirely) | 0 | match | +| types-typedslots1 | typed slots (P4.5): the fused kernel fast on the matching shape, slow on repr-mismatched / extra-field / dictionary receivers; -0 (1/x sign), NaN, Infinity bit-survival through raw slot store→load; a mid-kernel repr-flip transition (string into an f64 field) and the boxed-field store paths (`shapeGuards=9 shapeTyped=loads:7,stores:1 bornShaped=3 ctorFills=2`); node-identical incl. under EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7 | 9 | match | ¹ node cannot execute this file's bare-ESM import layout from test/; the check here is flag-off vs `--types` executables producing identical diff --git a/test/types/types-typedslots1.js b/test/types/types-typedslots1.js new file mode 100644 index 00000000..a579228f --- /dev/null +++ b/test/types/types-typedslots1.js @@ -0,0 +1,68 @@ +// typed slots (shapes-plan P4.5): f64-repr slots are accessed RAW inside +// guard regions — slot_load produces a raw f64, slot_store consumes one, +// and the heterogeneous merge fuses shape + numeric regions so the kernel +// below runs one has_shape guard, raw loads, and raw arithmetic with one +// generic slow path. The probe pins the semantics the raw flow must not +// disturb: +// - the fused kernel on the matching shape (fast) and on repr-mismatched +// / extra-field / dictionary-mode receivers (slow) — same values; +// - bit-level observables through raw slot traffic: -0 (1/x sign), NaN, +// Infinity survive store→load round trips; +// - an f64-field store of a number takes the typed fast path; storing a +// string into the same field is a repr TRANSITION (generic path) and +// later reads guard-fail to the slow path — values stay node-identical; +// - a boxed-field store of a non-number stays on its (boxed) fast path. +function Pt(x, y) { + this.x = x; + this.y = y; +} +function kern(p) { + return p.x * p.x + p.y * p.y; +} +function getx(p) { + return p.x; +} +function setx(p, v) { + p.x = v; + return p.x; +} +console.log(kern(new Pt(3, 4))); // fast: 25 +console.log(getx({ x: "a", y: "b" })); // repr mismatch: slow read, "a" +// (string * string is a standing runtime gap — ejs-ops.c _ejs_op_mult — +// so repr-mismatched receivers are exercised through reads, not kern) +var wide = { x: 1, y: 2, z: 3 }; +console.log(kern(wide)); // extra field: slow, 5 +var del = { x: 5, y: 6 }; +delete del.x; +del.x = 5; +console.log(kern(del)); // dictionary mode: slow, 61 + +// bit-level observables through raw slot traffic +var q = new Pt(-0, 0 / 0); +console.log(1 / q.x); // -Infinity (the -0 survived) +console.log(q.y === q.y); // false (NaN survived) +console.log(setx(q, 1 / 0)); // Infinity through the typed store +console.log(1 / setx(q, -0)); // -Infinity through the typed store + +// repr transition: the typed store's has_tag guard routes the string to +// the generic path, which transitions x to boxed; later typed reads +// guard-fail (shape changed) and stay correct +var t = new Pt(1, 2); +console.log(setx(t, "s")); // "s" (transition, generic) +console.log(t.x + t.y); // "s2" (guard-failing typed read) +console.log(setx(t, 9)); // 9 (x now boxed-repr: generic again) +console.log(t.x + t.y); // 11 + +// a boxed field keeps its boxed fast path for non-numbers +function Tag(name, v) { + this.name = name; + this.v = v; +} +function rename(o, s) { + o.name = s; + return o.name; +} +var g = new Tag("a", 1); +console.log(rename(g, "b")); // boxed fast store +console.log(rename(g, 7)); // number into boxed field: generic +console.log(g.name + ":" + g.v); From bf8bbd0a207edc8902da069f55158ca506364ae4 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 17:31:08 -0700 Subject: [PATCH 111/146] =?UTF-8?q?eir:=20P4.6=20measured=20extensions=20?= =?UTF-8?q?=E2=80=94=202-way=20poly=20guard=20chains=20land,=20rest=20evid?= =?UTF-8?q?ence-recorded?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The phase ran as its discipline dictates: an evidence probe per candidate first, implementation only where the numbers and a sound design both existed. 2-way polymorphic shape guards: LANDED. The probe exposed a maam precision bug on the way in — receiverShapesOfNode terminal-filtered the JOINED shape list, so one class's terminal ({x,y}) was absorbed by another's superset ({x,y,z}) and 2-shape sites were reported monomorphic (sound only via the runtime guard; half the receivers ran generic). maam fix (submodule): terminal-filter per object address, then union. Compiler: ShapeQuery carries 1-2 exact shapes (each must pass the full screen and carry the field; >2 declines; dupes fold to mono), propGet/propSet lower guard CHAINS — the second has_shape tests on the first's miss edge, each fast arm under its own same-block-fresh fact, so the verifier's P4.3/P4.5 rules apply per arm unchanged. Mono IR is byte-identical to P4.5. Optimizer machinery is mono-strict and refuses chains wholesale (pinned). EJS_NO_POLY_SHAPE_GUARDS bisect hook; shapePolyGuards telemetry (additive). Measured on the new types-bench3 (alternating {x,y}/{z,x,y} receivers): 0.31s — parity with the monomorphic twin — vs 1.67s declined, 3.64s flag-off (5.4x), 0.99s pre-P4.6 false-mono (3.2x). Accessor inlining: DECLINED, ~7x headroom recorded (types-accessor1; 2.31s vs 0.32s equivalent guarded arithmetic) — a receiver has_shape proves nothing about the dictionary-mode proto carrying the getter; proto-guard machinery is a designed phase, not a measured extension. Pretenuring: DEFERRED — no generational mover, no consumer; gc-plan owns it. Array element shapes: DEFERRED, numbers recorded (types-array1: 0.57s vs 1.38s flag-off vs 0.06s node) — arrays are exotics outside shaped mode. Gate: matrix x7 green (incl. 7 new poly unit tests); --types diff lane 0-divergent (476 files; shapePolyGuards=25 suite-wide, poly declines 12 -> 3); types-poly1 wrong-oracle probe identical across --types / flag-off / EJS_SHAPES=off / gc-stress; types-bench2 mono world bit-identical. Co-Authored-By: Claude Fable 5 --- docs/shapes-plan.md | 95 ++++++++++++++++-- external-deps/echojs-maam | 2 +- lib/compiler.ts | 4 + lib/eir/integrate.ts | 4 + lib/eir/lower.ts | 180 ++++++++++++++++++++++------------ lib/eir/oracle.ts | 64 +++++++----- lib/eir/tests.ts | 139 +++++++++++++++++++++++++- test/types/README.md | 10 ++ test/types/types-accessor1.js | 31 ++++++ test/types/types-array1.js | 27 +++++ test/types/types-bench3.js | 27 +++++ test/types/types-poly1.js | 18 ++++ test/types/types-poly1/lib.js | 14 +++ 13 files changed, 513 insertions(+), 102 deletions(-) create mode 100644 test/types/types-accessor1.js create mode 100644 test/types/types-array1.js create mode 100644 test/types/types-bench3.js create mode 100644 test/types/types-poly1.js create mode 100644 test/types/types-poly1/lib.js diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index 43094e15..a1e206ad 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -321,8 +321,10 @@ The trust ladder, restated as policy for shapes: *exact* — monomorphic, non-megamorphic, `shapeCapHits==0` for the site, every guarded field's repr a single tag. Wrong oracle = slow path taken = speed lost, never correctness — the P3 contract. -2. **Exact facts only, no near-misses.** Two terminal shapes ⇒ no - diamond (a 2-way guard is a P4.6 *measured* extension, not a default); +2. **Exact facts only, no near-misses.** Three or more terminal shapes + ⇒ no diamond; exactly two lower to the P4.6 2-way chain (measured and + landed — see the P4.6 entry), and only when EVERY shape in the answer + passes the same exactness screen and carries the accessed field; union-repr fields load boxed; anything the oracle degraded (`degradedBindings`, unknown calls touching the receiver) declines. This is `operandIsNumber`'s "exactly {number}" rule transplanted. @@ -749,10 +751,81 @@ revertable, runtime phases A/B-able against the old path. guarded path reaches parity with the trusted P3.6 clone, and the IR meets gc-P5 with one addressing seam, slot-index immediates, and straight-line raw regions to point inline-slot addressing at. -- [ ] **P4.6 — Measured extensions.** 2-way polymorphic guards; - accessor inlining from monomorphic `accessorSites()`; pretenuring - hooks (gc-plan's oracle pretenuring); array element shapes. Each - only on benchmark evidence, each behind its own flag. +- [x] **P4.6 — Measured extensions.** DONE 2026-07-24. The phase ran + as its own discipline dictates: an evidence probe per candidate + FIRST, implementation only where the numbers and a sound design + both existed. Verdicts: + - **2-way polymorphic guards: LANDED.** The evidence probe (two + Point classes {x,y} / {z,x,y} alternating through one kernel + site) first exposed a maam precision bug: `receiverShapesOfNode` + ran the `terminalShapes` subsumption filter over the JOINED + shape list, so one class's terminal ({x,y}) was absorbed by + another class's superset ({x,y,z}) exactly as if it were a + construction intermediate — 2-shape sites reported as + MONOMORPHIC on the bigger shape (sound only because the runtime + guard made the {x,y} half run generic; the suite's + "polymorphic 12" decline census was a large undercount). Fix + in maam (`analysis.ts` + pinned test): terminal-filter PER + OBJECT ADDRESS, then union — an object's own intermediates are + still subsumed, distinct classes both survive. Compiler side: + `ShapeQuery` carries 1-2 exact shapes (>2 declines + "polymorphic"; every shape must pass the full exactness screen + AND carry the accessed field — criterion 2, no near-misses; + structural duplicates dedupe to mono), and propGet/propSet + lower a guard CHAIN — the second has_shape tests on the first's + miss edge, so each fast arm sits under its own same-block-fresh + fact and the verifier's P4.3/P4.5 rules apply per arm unchanged + (typed f64 arms box at their own exits; stores split has_tag + per arm, oriented by that arm's field repr). The mono path + emits byte-identical IR to P4.5. The optimizer's region/fold + machinery is mono-strict and refuses chains wholesale (pinned: + 4 guards survive `p.x + p.x` un-merged, module re-verifies) — + chain-aware merging is future measured work, and wall time + says it can wait. `EJS_NO_POLY_SHAPE_GUARDS=1` is the bisect + hook (2-shape sites decline "polymorphic" exactly as before); + telemetry grows `shapePolyGuards=N` (additive). **Measured** + (M-series, types-bench3 = the bench2 kernel with alternating + receivers): chain **0.31s — parity with the monomorphic twin + (0.32s)** — vs 1.67s declined (the bisect flag) and 3.64s + flag-off: **5.4×** for the chain over the decline, and the + pre-P4.6 false-mono world's 0.99s (half the receivers missing + the guard) is beaten 3.2×. Probe types-poly1 (both arms fast, + typed stores per arm; cross-module repr-mismatched / third- + shape / dictionary receivers all through the shared slow path) + is identical across --types/flag-off/EJS_SHAPES=off/gc-stress. + - **Accessor inlining: DECLINED, evidence recorded.** The probe + (defineProperty proto getter, 20M dispatches — getter LITERALS + are still a maam NormalizeError) measures 2.31s under --types + vs 5.44s flag-off; the same arithmetic through P4.3 guarded + slots runs 0.32s, so ~7× headroom exists. But a receiver + has_shape proves NOTHING about the proto that carries the + getter (accessor-bearing protos are dictionary-mode by P4.2 + design — mutable maps), so sound inlining needs proto-identity + /proto-shape guard machinery plus maam-side accessor modeling + that does not exist. That is new soundness surface, not a + measured extension; revisit as its own designed phase. + - **Pretenuring hooks: DEFERRED — no consumer.** The + generational mover (gc-P2+) is not built; there is no nursery/ + tenured split for an oracle hint to steer. gc-plan owns it. + - **Array element shapes: DEFERRED, evidence recorded.** The + element-kernel probe (64-element dense f64 array, 20M reads): + 0.57s under --types vs 1.38s flag-off vs node 0.06s. Real + headroom, but arrays are exotics outside shaped mode by scope + (P4.x is plain objects), maam smashes element types, and typed + element storage is its own runtime subsystem — routed to a + future phase alongside the gc-plan storage work. + *Gate results (2026-07-24):* matrix ×7 green (test-eir + 7 new + poly unit tests incl. the optimizer-refusal pin, lowtier, stages + 0-3, `//:test-stage1-shapes-off`); --types diff lane + **0-divergent** (476 files, 475 identical, 1 N/A = tester.js; + suite telemetry: 13,323 sites, 865 guarded of which + **shapePolyGuards=25** — poly chains fire in real suite files + (eir-syntax4, shapes-storm1), not just the probes; declines: + unmapped 7,705 / capped 4,263 / empty 272 / no-field 199 / + union-repr 16 / polymorphic **3** — down from 12: the survivors + are genuine >2-shape sites, and the old count was an undercount + built on the false-mono maam reports). types-bench2 (mono world) + regression-checked bit-identical stats/output/wall-time. P4.1/P4.2 are pure runtime and can proceed independently of maam; P4.3+ are compiler phases in the P3 mold. gc-P1 and P4.1 share one atomic @@ -878,5 +951,11 @@ layout change whichever lands first. fusion; bench2 total unchanged at 2.04s because the residual is the alloc loop; invariant-receiver kernels now constant-fold; guarded path at parity with trusted clones). -- [ ] **P4.6** measured extensions (poly guards, accessor inlining, - pretenuring, arrays) — evidence-gated. +- [x] **P4.6** measured extensions — evidence-gated, all four candidates + probed and measured. DONE 2026-07-24: 2-way poly guard chains + LANDED (kernel 5.4× vs decline, mono parity; required the maam + per-object terminal-filter fix — the false-mono finding); accessor + inlining declined (7× headroom recorded, blocked on proto-guard + soundness machinery); pretenuring deferred (no mover yet — gc-plan + owns it); array element shapes deferred (numbers recorded; arrays + are outside shaped mode by scope). See the phased-plan entry. diff --git a/external-deps/echojs-maam b/external-deps/echojs-maam index d8610d3f..14320723 160000 --- a/external-deps/echojs-maam +++ b/external-deps/echojs-maam @@ -1 +1 @@ -Subproject commit d8610d3f025f1a3dfef29bf9c73724c3f6c5ff83 +Subproject commit 143207230b194c183cab813a806f4484ab7d34d2 diff --git a/lib/compiler.ts b/lib/compiler.ts index df68e5b2..4c8376bc 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -878,6 +878,10 @@ export function compile( // shape telemetry, present only when sites were consulted ((lowered.shape_sites ?? 0) > 0 ? ` shapeSites=${lowered.shape_sites} shapeGuards=${lowered.shape_guards ?? 0}` + + // shapes-plan P4.6: poly-chain telemetry (additive) + ((lowered.shape_poly_guards ?? 0) > 0 + ? ` shapePolyGuards=${lowered.shape_poly_guards}` + : "") + ` shapeDeclined=${declineStr || "none"}` : "") + // shapes-plan P4.5: typed slot telemetry (additive) diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 5ed60fe6..fb480a16 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -54,6 +54,8 @@ export type CollectResult = // shapes-plan P4.3 telemetry (all zero/empty when --types is off) shape_sites: number; shape_guards: number; + // shapes-plan P4.6: 2-way polymorphic chains (subset of guards) + shape_poly_guards: number; shape_declined: Record; // shapes-plan P4.4: born-with-shape telemetry born_shaped: number; @@ -73,6 +75,7 @@ export type CollectResult = diamonds?: undefined; shape_sites?: undefined; shape_guards?: undefined; + shape_poly_guards?: undefined; shape_declined?: undefined; born_shaped?: undefined; ctor_fills?: undefined; @@ -539,6 +542,7 @@ export function collectEIRToplevel( diamonds: typed_stats.diamonds, shape_sites: typed_stats.shape_sites ?? 0, shape_guards: typed_stats.shape_guards ?? 0, + shape_poly_guards: typed_stats.shape_poly_guards ?? 0, shape_declined: typed_stats.shape_declined ?? {}, born_shaped: typed_stats.born_shaped ?? 0, ctor_fills: typed_stats.ctor_fills ?? 0, diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index f41dbdbe..9a7ab58d 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -65,6 +65,9 @@ export interface ModCtx { trusted?: number; shape_sites?: number; shape_guards?: number; + // shapes-plan P4.6: sites guarded with the 2-way polymorphic + // chain (a subset of shape_guards) + shape_poly_guards?: number; shape_declined?: Record; // shapes-plan P4.4: born-with-shape telemetry — literal sites // batched into make_object_shaped, constructor prefixes batched @@ -906,12 +909,18 @@ class LowerFunction { console.warn(`--types-dump: shapes: .${atom} @${where}: ${what}`); } - // the exact shape fact for accessing `atom` on the value of `objNode`, - // or null (with the decline counted) when anything is short of exact + // the exact shape facts for accessing `atom` on the value of `objNode` + // — one fact per oracle shape (two = the P4.6 polymorphic chain), or + // null (with the decline counted) when anything is short of exact. + // Every shape in a multi-shape answer must carry the field: a shape + // that lacks it would need the fast arm to run proto-lookup semantics, + // which only the generic path performs (criterion 2 — no near-misses). + // EJS_NO_POLY_SHAPE_GUARDS=1 is the P4.6 bisect hook: 2-shape sites + // decline "polymorphic" exactly as they did before the extension. shapeFactFor( objNode: e.Expression | null, atom: string - ): { key: string; slot: number; repr: "boxed" | "f64" } | null { + ): { key: string; slot: number; repr: "boxed" | "f64" }[] | null { if (!objNode || !this.oracle || !this.oracle.receiverShapeOfNode) return null; if (process.env["EJS_NO_SHAPE_GUARDS"]) return null; const stats = this.mod_ctx.typed_stats; @@ -921,49 +930,81 @@ class LowerFunction { this.shapeDumpSite(objNode, atom, `declined ${q.declined}`); return this.shapeDecline(q.declined); } - const slot = q.fields.findIndex((f) => f.name === atom); - if (slot < 0) { - this.shapeDumpSite(objNode, atom, "declined no-field"); - return this.shapeDecline("no-field"); // proto/method access + if (q.shapes.length > 1 && process.env["EJS_NO_POLY_SHAPE_GUARDS"]) { + this.shapeDumpSite(objNode, atom, "declined polymorphic"); + return this.shapeDecline("polymorphic"); } - const key = this.module.internShape(q.fields); - if (stats) stats.shape_guards = (stats.shape_guards ?? 0) + 1; - this.shapeDumpSite(objNode, atom, `guarded shape="${key}" slot=${slot}`); - return { key, slot, repr: q.fields[slot]!.repr }; + const facts: { key: string; slot: number; repr: "boxed" | "f64" }[] = []; + for (const fields of q.shapes) { + const slot = fields.findIndex((f) => f.name === atom); + if (slot < 0) { + this.shapeDumpSite(objNode, atom, "declined no-field"); + return this.shapeDecline("no-field"); // proto/method access + } + const key = this.module.internShape(fields); + // structurally-equal shapes reported twice guard once + if (!facts.some((f) => f.key === key)) + facts.push({ key, slot, repr: fields[slot]!.repr }); + } + if (facts.length === 0) return this.shapeDecline("unmapped"); + if (stats) { + stats.shape_guards = (stats.shape_guards ?? 0) + 1; + if (facts.length > 1) + stats.shape_poly_guards = (stats.shape_poly_guards ?? 0) + 1; + } + this.shapeDumpSite( + objNode, + atom, + facts.map((f) => `guarded shape="${f.key}" slot=${f.slot}`).join(" | ") + ); + return facts; } - // obj.atom: has_shape diamond whose fast arm is a fixed-slot load and - // whose slow arm is today's generic get — the numericDiamond skeleton - // with a shape guard at the head + // obj.atom: a has_shape chain whose fast arms are fixed-slot loads and + // whose shared slow arm is today's generic get — the numericDiamond + // skeleton with one guard per exact fact. One fact is the P4.3 mono + // diamond exactly; two facts (the P4.6 polymorphic extension) test the + // second shape on the first guard's miss edge, so each fast arm sits + // under its own same-block-fresh has_shape fact and the verifier's + // rules apply per arm unchanged. propGet(objNode: e.Expression | null, obj: Inst, atom: string): Inst { - const f = this.shapeFactFor(objNode, atom); - if (!f) return this.b.emit("get_prop_atom", [obj], { atom: atom }); + const facts = this.shapeFactFor(objNode, atom); + if (!facts) return this.b.emit("get_prop_atom", [obj], { atom: atom }); - const fast_bb = this.b.newBlock("shape_fast"); + const fast_bbs = facts.map(() => this.b.newBlock("shape_fast")); + const chk_bbs = facts.slice(1).map(() => this.b.newBlock("shape_chk")); const slow_bb = this.b.newBlock("shape_slow"); const join_bb = this.b.newBlock("shape_join"); const result = join_bb.addParam("prop"); - const t = this.b.emit("has_shape", [obj], { shape: f.key }); - this.b.condBr(t, fast_bb, [], slow_bb, []); - this.b.sealBlock(fast_bb); - this.b.sealBlock(slow_bb); + for (let i = 0; i < facts.length; i++) { + const f = facts[i]!; + const miss = i + 1 < facts.length ? chk_bbs[i]! : slow_bb; + const t = this.b.emit("has_shape", [obj], { shape: f.key }); + this.b.condBr(t, fast_bbs[i]!, [], miss, []); + this.b.sealBlock(fast_bbs[i]!); + this.b.sealBlock(miss); + if (miss !== slow_bb) this.b.setInsertPoint(miss); + } - this.b.setInsertPoint(fast_bb); - const v = this.b.emit("slot_load", [obj], { shape: f.key, slot: f.slot, repr: f.repr }); - if (f.repr === "f64") { - // P4.5 typed slots: the load produces a raw f64 (the guard - // proved the repr; the slot bytes ARE the double). Box once at - // the fast exit — the join stays boxed (its slow edge is the - // generic get), and the optimizer's region fusion + rawJoin - // machinery strips the box wherever the consumer is raw. - v.type = "f64"; - const stats = this.mod_ctx.typed_stats; - if (stats) stats.typed_loads = (stats.typed_loads ?? 0) + 1; - const boxed = this.b.emit("box_f64", [v], {}); - this.b.br(join_bb, [boxed]); - } else { - this.b.br(join_bb, [v]); + for (let i = 0; i < facts.length; i++) { + const f = facts[i]!; + this.b.setInsertPoint(fast_bbs[i]!); + const v = this.b.emit("slot_load", [obj], { shape: f.key, slot: f.slot, repr: f.repr }); + if (f.repr === "f64") { + // P4.5 typed slots: the load produces a raw f64 (the guard + // proved the repr; the slot bytes ARE the double). Box once at + // the fast exit — the join stays boxed (its slow edge is the + // generic get), and the optimizer's region fusion + rawJoin + // machinery strips the box wherever the consumer is raw. + v.type = "f64"; + const stats = this.mod_ctx.typed_stats; + if (stats) stats.typed_loads = (stats.typed_loads ?? 0) + 1; + const boxed = this.b.emit("box_f64", [v], {}); + this.b.br(join_bb, [boxed]); + } else { + this.b.br(join_bb, [v]); + } } this.b.setInsertPoint(slow_bb); @@ -982,42 +1023,55 @@ class LowerFunction { // field repr — f64 fields take numbers fast, boxed fields take // non-numbers fast, everything else goes generic. propSet(objNode: e.Expression | null, obj: Inst, atom: string, v: Inst): void { - const f = this.shapeFactFor(objNode, atom); - if (!f) { + const facts = this.shapeFactFor(objNode, atom); + if (!facts) { this.b.emit("set_prop_atom", [obj, v], { atom: atom }); return; } - const tag_bb = this.b.newBlock("shape_settag"); - const fast_bb = this.b.newBlock("shape_setfast"); + // per-fact tag+fast pair (mono creation order preserved: tag, + // fast, slow, join), then the P4.6 chain blocks + const tag_bbs = facts.map(() => this.b.newBlock("shape_settag")); + const fast_bbs = facts.map(() => this.b.newBlock("shape_setfast")); + const chk_bbs = facts.slice(1).map(() => this.b.newBlock("shape_setchk")); const slow_bb = this.b.newBlock("shape_setslow"); const join_bb = this.b.newBlock("shape_setjoin"); - const t = this.b.emit("has_shape", [obj], { shape: f.key }); - this.b.condBr(t, tag_bb, [], slow_bb, []); - this.b.sealBlock(tag_bb); - - this.b.setInsertPoint(tag_bb); - const isnum = this.b.emit("has_tag", [v], { tag: "number" }); - if (f.repr === "f64") this.b.condBr(isnum, fast_bb, [], slow_bb, []); - else this.b.condBr(isnum, slow_bb, [], fast_bb, []); - this.b.sealBlock(fast_bb); - this.b.sealBlock(slow_bb); + for (let i = 0; i < facts.length; i++) { + const f = facts[i]!; + const miss = i + 1 < facts.length ? chk_bbs[i]! : slow_bb; + const t = this.b.emit("has_shape", [obj], { shape: f.key }); + this.b.condBr(t, tag_bbs[i]!, [], miss, []); + this.b.sealBlock(tag_bbs[i]!); + if (miss !== slow_bb) this.b.sealBlock(miss); + + this.b.setInsertPoint(tag_bbs[i]!); + const isnum = this.b.emit("has_tag", [v], { tag: "number" }); + if (f.repr === "f64") this.b.condBr(isnum, fast_bbs[i]!, [], slow_bb, []); + else this.b.condBr(isnum, slow_bb, [], fast_bbs[i]!, []); + this.b.sealBlock(fast_bbs[i]!); + // slow's predecessors: every tag block plus the last miss edge + if (i === facts.length - 1) this.b.sealBlock(slow_bb); + if (i + 1 < facts.length) this.b.setInsertPoint(chk_bbs[i]!); + } - this.b.setInsertPoint(fast_bb); - if (f.repr === "f64") { - // P4.5 typed slots: unbox under the has_tag guard (the true - // edge into this block proved v is a number, so the bits are - // the double) and store raw — the type system carries the - // repr proof the verifier's store rule now requires. - const raw = this.b.emit("unbox_f64", [v], {}); - this.b.emit("slot_store", [obj, raw], { shape: f.key, slot: f.slot, repr: f.repr }); - const stats = this.mod_ctx.typed_stats; - if (stats) stats.typed_stores = (stats.typed_stores ?? 0) + 1; - } else { - this.b.emit("slot_store", [obj, v], { shape: f.key, slot: f.slot, repr: f.repr }); + for (let i = 0; i < facts.length; i++) { + const f = facts[i]!; + this.b.setInsertPoint(fast_bbs[i]!); + if (f.repr === "f64") { + // P4.5 typed slots: unbox under the has_tag guard (the true + // edge into this block proved v is a number, so the bits are + // the double) and store raw — the type system carries the + // repr proof the verifier's store rule now requires. + const raw = this.b.emit("unbox_f64", [v], {}); + this.b.emit("slot_store", [obj, raw], { shape: f.key, slot: f.slot, repr: f.repr }); + const stats = this.mod_ctx.typed_stats; + if (stats) stats.typed_stores = (stats.typed_stores ?? 0) + 1; + } else { + this.b.emit("slot_store", [obj, v], { shape: f.key, slot: f.slot, repr: f.repr }); + } + this.b.br(join_bb, []); } - this.b.br(join_bb, []); this.b.setInsertPoint(slow_bb); this.b.emit("set_prop_atom", [obj, v], { atom: atom }); diff --git a/lib/eir/oracle.ts b/lib/eir/oracle.ts index 02c7c5a7..ba3180d5 100644 --- a/lib/eir/oracle.ts +++ b/lib/eir/oracle.ts @@ -153,26 +153,33 @@ export interface OracleShapeField { export type ShapeDeclineReason = | "unmapped" // node unknown to the analysis (or maam predates the query) - | "polymorphic" // more than one terminal shape + | "polymorphic" // more terminal shapes than the guard budget (>2) | "megamorphic" // the ⊤ shape | "capped" // shapeCapHits > 0: some shape set was widened this module | "union-repr" // a field's TypeSig straddles num/non-num | "no-order" // no ordered witness for the shape | "empty"; // the empty shape (nothing to access) +// shapes-plan P4.6: a query answer carries ONE OR TWO exact shapes. Two +// shapes is the measured 2-way polymorphic extension — every shape in the +// answer independently passes the full exactness screen (non-megamorphic, +// non-empty, ordered witness, single-tag reprs); a set where ANY member +// falls short declines the whole site (criterion 2 — no near-misses), +// and >2 declines "polymorphic" as before. export type ShapeQuery = - | { fields: OracleShapeField[]; declined?: undefined } - | { declined: ShapeDeclineReason; fields?: undefined }; + | { shapes: OracleShapeField[][]; declined?: undefined } + | { declined: ShapeDeclineReason; shapes?: undefined }; export interface TypeOracle { // type of the value an expression node evaluates to (join over all // reached contexts); "top" when unknown/unanalyzed typeOfNode(n: e.Node): EirType; - // shapes-plan P4.3: the receiver-shape fact for a property access's - // object node — exact facts only (monomorphic, non-megamorphic, - // uncapped, all reprs single-tag, ordered witness present), everything - // else a counted decline. Optional so stub oracles predating shapes - // keep working; absent = no shape facts. + // shapes-plan P4.3/P4.6: the receiver-shape facts for a property + // access's object node — exact facts only (non-megamorphic, uncapped, + // all reprs single-tag, ordered witness present), at most two shapes + // (the P4.6 poly budget), everything else a counted decline. + // Optional so stub oracles predating shapes keep working; absent = + // no shape facts. receiverShapeOfNode?(n: e.Node): ShapeQuery; // required before any UNguarded consumption (guarded fast paths don't // need it) @@ -409,8 +416,10 @@ export function runTypeAnalysisProbe( if (sig === undefined) stats.unknown++; return typeSigToEirType(sig); }, - // shapes-plan P4.3: exact receiver-shape facts, every near-miss - // a counted decline (promotion criterion 2 — no near-misses) + // shapes-plan P4.3/P4.6: exact receiver-shape facts, every + // near-miss a counted decline (promotion criterion 2 — no + // near-misses). Up to TWO shapes survive (the P4.6 poly + // budget); each must pass the full screen independently. receiverShapeOfNode: (n): ShapeQuery => { if (!result.receiverShapesOfNode || !result.fieldOrderOfShape) return { declined: "unmapped" }; // older maam build @@ -418,23 +427,26 @@ export function runTypeAnalysisProbe( const shapes = result.receiverShapesOfNode(n); if (shapes === undefined || shapes.length === 0) return { declined: "unmapped" }; - if (shapes.length > 1) return { declined: "polymorphic" }; - const s = shapes[0]!; - if (s.megamorphic) return { declined: "megamorphic" }; - if (s.fields.length === 0) return { declined: "empty" }; - const order = result.fieldOrderOfShape(s); - if (!order || order.length !== s.fields.length) - return { declined: "no-order" }; - const typeByName = new Map(s.fields.map((f) => [f.name, f.type])); - const fields: OracleShapeField[] = []; - for (const name of order) { - const sig = typeByName.get(name); - if (sig === undefined) return { declined: "no-order" }; - const repr = typeSigToShapeRepr(sig); - if (repr === null) return { declined: "union-repr" }; - fields.push({ name, repr }); + if (shapes.length > 2) return { declined: "polymorphic" }; + const out: OracleShapeField[][] = []; + for (const s of shapes) { + if (s.megamorphic) return { declined: "megamorphic" }; + if (s.fields.length === 0) return { declined: "empty" }; + const order = result.fieldOrderOfShape(s); + if (!order || order.length !== s.fields.length) + return { declined: "no-order" }; + const typeByName = new Map(s.fields.map((f) => [f.name, f.type])); + const fields: OracleShapeField[] = []; + for (const name of order) { + const sig = typeByName.get(name); + if (sig === undefined) return { declined: "no-order" }; + const repr = typeSigToShapeRepr(sig); + if (repr === null) return { declined: "union-repr" }; + fields.push({ name, repr }); + } + out.push(fields); } - return { fields }; + return { shapes: out }; }, // The plan text gates closedWorld() on unknownCalls alone because it // predates the degradedBindings counter (unmodeled imports, rest diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 4d018de0..58997831 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -1985,9 +1985,10 @@ test("shape-oracle: TypeSig -> repr (num=f64, non-num unions=boxed, straddles de }); // a stub oracle with receiver-shape facts: types Identifier receivers by -// name; everything else declines as unmapped (the real oracle's fail-soft) +// name; everything else declines as unmapped (the real oracle's fail-soft). +// A receiver may carry one shape (mono) or two (the P4.6 poly chain). function stubShapeOracle( - shapes: Record, + shapes: Record, types?: Record ): TypeOracle { const base = stubOracle(types || {}); @@ -1995,9 +1996,11 @@ function stubShapeOracle( ...base, receiverShapeOfNode: (n) => { const id = n as { type?: string; name?: string }; - const fields = + const entry = id.type === "Identifier" && id.name !== undefined ? shapes[id.name] : undefined; - return fields ? { fields } : { declined: "unmapped" }; + if (!entry) return { declined: "unmapped" }; + const list = Array.isArray(entry[0]) ? (entry as OracleShapeField[][]) : [entry as OracleShapeField[]]; + return { shapes: list }; }, }; } @@ -2082,6 +2085,111 @@ test("shapes: EJS_NO_SHAPE_GUARDS disables the diamonds", () => { } }); +// --- shapes-plan P4.6: 2-way polymorphic guard chains ---------------------------- + +// the second class of the poly pair: same fields x/y at DIFFERENT slots +// (plus its own z), so per-arm slot immediates are observable +const PZXY: OracleShapeField[] = [ + { name: "z", repr: "f64" }, + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, +]; + +test("shapes-poly: two exact shapes lower a get to a guard chain, one slow path", () => { + const { printed } = lowerWithOracle( + "function f(p) { return p.y; }", + stubShapeOracle({ p: [PXY, PZXY] }) + ); + const guards = (printed.match(/has_shape/g) || []).length; + assert(guards === 2, `expected 2 chained guards, got ${guards}`); + assertContains(printed, 'shape="x:f64,y:f64,s:boxed"'); + assertContains(printed, 'shape="z:f64,x:f64,y:f64"'); + assertContains(printed, "shape_chk"); // the second guard tests on the first's miss edge + assertContains(printed, "slot=1"); // y in {x,y,s} + assertContains(printed, "slot=2"); // y in {z,x,y} + const slows = (printed.match(/get_prop_atom/g) || []).length; + assert(slows === 1, `the chain shares ONE generic slow path, got ${slows}`); +}); + +test("shapes-poly: a field absent from either shape declines the whole site", () => { + // s lives only in PXY: the PZXY arm would need proto-lookup semantics, + // which only the generic path has (criterion 2 — no near-misses) + const { printed } = lowerWithOracle( + "function f(p) { return p.s; }", + stubShapeOracle({ p: [PXY, PZXY] }) + ); + assertNotContains(printed, "has_shape"); + assertContains(printed, "get_prop_atom"); +}); + +test("shapes-poly: stores chain with a tag split per arm, one generic path", () => { + const { printed } = lowerWithOracle( + "function f(p, v) { p.x = v; }", + stubShapeOracle({ p: [PXY, PZXY] }) + ); + assert((printed.match(/has_shape/g) || []).length === 2, "2 chained guards"); + assert((printed.match(/has_tag/g) || []).length === 2, "a tag split per arm"); + assert((printed.match(/slot_store/g) || []).length === 2, "a typed store per arm"); + assert((printed.match(/set_prop_atom/g) || []).length === 1, "one generic path"); + assertContains(printed, "shape_setchk"); +}); + +test("shapes-poly: mixed reprs orient each arm by its own field repr", () => { + const A: OracleShapeField[] = [{ name: "x", repr: "f64" }]; + const B: OracleShapeField[] = [ + { name: "x", repr: "boxed" }, + { name: "w", repr: "boxed" }, + ]; + const get = lowerWithOracle( + "function f(p) { return p.x; }", + stubShapeOracle({ p: [A, B] }) + ).printed; + // only the f64 arm boxes its raw load + assert((get.match(/box_f64/g) || []).length === 1, "exactly one arm boxes"); + assertContains(get, 'repr="f64"'); + assertContains(get, 'repr="boxed"'); + const set = lowerWithOracle( + "function f(p, v) { p.x = v; }", + stubShapeOracle({ p: [A, B] }) + ).printed; + // one arm takes numbers fast (tag-true -> fast), the other non-numbers + assert( + /cond_br %\d+ -> \^shape_setfast\d+\(\), \^shape_setslow\d+\(\)/.test(set), + "f64 arm: tag-true -> fast" + ); + assert( + /cond_br %\d+ -> \^shape_setslow\d+\(\), \^shape_setfast\d+\(\)/.test(set), + "boxed arm: tag-true -> slow" + ); +}); + +test("shapes-poly: EJS_NO_POLY_SHAPE_GUARDS declines 2-shape sites, keeps mono", () => { + process.env["EJS_NO_POLY_SHAPE_GUARDS"] = "1"; + try { + const poly = lowerWithOracle( + "function f(p) { return p.y; }", + stubShapeOracle({ p: [PXY, PZXY] }) + ).printed; + assertNotContains(poly, "has_shape"); + const mono = lowerWithOracle( + "function f(p) { return p.y; }", + stubShapeOracle({ p: PXY }) + ).printed; + assertContains(mono, "has_shape"); + } finally { + delete process.env["EJS_NO_POLY_SHAPE_GUARDS"]; + } +}); + +test("shapes-poly: structurally equal shapes reported twice guard once", () => { + const { printed } = lowerWithOracle( + "function f(p) { return p.y; }", + stubShapeOracle({ p: [PXY, PXY] }) + ); + const guards = (printed.match(/has_shape/g) || []).length; + assert(guards === 1, `duplicate shapes must dedupe to a mono diamond, got ${guards}`); +}); + // --- shapes: verifier rules (hand-built attack IR) ------------------------------- function assertThrows(fn: () => void, needle: string): void { @@ -2299,6 +2407,29 @@ test("shapes-opt: consecutive gets on one receiver merge to one guard region", ( assert(loads === 2, `expected 2 slot_loads, got ${loads}`); }); +test("shapes-poly-opt: chains pass the optimizer un-merged and re-verify", () => { + // The region matcher and fact folder are mono-strict by construction: + // a P4.6 chain's first guard has the second CHECK block as its miss + // edge (not a generic slow arm) and its join has three predecessors, + // so both machineries must refuse — everything survives verbatim and + // the module re-verifies. (Chain-aware merging is future measured + // work; kernel wall time is at mono parity without it.) + const r = lowerFunctionNode( + parseFn("function f(p) { return p.x + p.x; }"), + undefined, + stubShapeOracle({ p: [PXY, PZXY] }) + ); + verifyModule(r.module); + const stats = optimizeFunction(r.fn, r.module); + verifyModule(r.module); + const printed = printFunction(r.fn); + assert(stats.shape_regions_merged === 0, `merged=${stats.shape_regions_merged}`); + assert(stats.shape_guards_folded === 0, `folded=${stats.shape_guards_folded}`); + assert(stats.shape_numeric_merged === 0, `het-merged=${stats.shape_numeric_merged}`); + const guards = (printed.match(/has_shape/g) || []).length; + assert(guards === 4, `2 sites x 2 chained guards must survive, got ${guards}`); +}); + test("shapes-opt: a call between accesses kills the facts and refuses the merge", () => { const { printed, stats } = lowerShapeOpt( "function f(p, g) { var a = p.x; g(); return a + p.x; }" diff --git a/test/types/README.md b/test/types/README.md index c70c5096..07459c77 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -39,6 +39,16 @@ counts has_shape diamonds the way `diamonds=N` counts has_tag ones): | types-bornshape1 | born-with-shape (P4.4): a static literal is make_object_shaped, the Pt ctor prefix is the empty-shape-guarded fill (`bornShaped=1 ctorFills=1`); keys order, `in`, growth past the born shape, and a repr-differing construction all match node | 0 | match | | types-bornshapewrong1 | P4.4 edge cases: a reused non-empty receiver (guard fails), an `in`-cut fence, a frozen receiver (runtime re-check), a proto-chain SETTER intercepting the batched store, and a non-writable proto data prop — every one routes sequential with node-identical output (`bornShaped=3 ctorFills=3 fenceDeclined=short-prefix:1`); also found the provenNumberIntrinsic const-join gap (which P4.5's typed stores later dissolved entirely) | 0 | match | | types-typedslots1 | typed slots (P4.5): the fused kernel fast on the matching shape, slow on repr-mismatched / extra-field / dictionary receivers; -0 (1/x sign), NaN, Infinity bit-survival through raw slot store→load; a mid-kernel repr-flip transition (string into an f64 field) and the boxed-field store paths (`shapeGuards=9 shapeTyped=loads:7,stores:1 bornShaped=3 ctorFills=2`); node-identical incl. under EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7 | 9 | match | +| types-bench3 | the P4.6 polymorphic microbenchmark: the bench2 kernel with two receiver classes ({x,y} / {z,x,y}) alternating at one site — the 2-way guard chain (`shapePolyGuards=4`) runs 0.31s, PARITY with the monomorphic twin, vs 1.67s declined (EJS_NO_POLY_SHAPE_GUARDS=1) and 3.64s flag-off (2026-07-24, M-series) | 4 (poly) | match | +| types-poly1 | the wrong-oracle probe for the 2-way chain: lib's oracle types sum/setx's receiver with BOTH terminal shapes from local calls (`shapePolyGuards=4 shapeTyped=loads:6,stores:2`); cross-module receivers it never saw — repr-mismatched, a third shape, dictionary-mode (post-delete) — all route through the shared slow path; identical output incl. under EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7 | 4 (in lib) | n/a¹ | + +P4.6 evidence probes (extensions measured and NOT landed; the numbers +and rationale live in shapes-plan.md's P4.6 entry): + +| probe | shape | vs node | +|---|---|---| +| types-accessor1 | proto-getter dispatch kernel, 20M `p.len2` reads (accessor inlining: ~7× headroom recorded, DECLINED pending proto-guard soundness machinery) | match | +| types-array1 | dense-array element kernel, 20M `a[j]` reads (element shapes: 2.4× headroom vs flag-off recorded, DEFERRED — arrays are outside shaped mode) | match | ¹ node cannot execute this file's bare-ESM import layout from test/; the check here is flag-off vs `--types` executables producing identical diff --git a/test/types/types-accessor1.js b/test/types/types-accessor1.js new file mode 100644 index 00000000..09f98ff8 --- /dev/null +++ b/test/types/types-accessor1.js @@ -0,0 +1,31 @@ +// the shapes-plan P4.6 accessor-inlining EVIDENCE probe (the extension +// was measured and DECLINED — see the plan's P4.6 entry). defineProperty +// (not a getter literal — those are a maam NormalizeError) installs a +// proto getter; every p.len2 is an accessor dispatch through the generic +// get, and p.len2 correctly declines "no-field" (the accessor is not in +// the receiver's shape). 2026-07-24 numbers (M-series): 2.31s --types / +// 5.44s flag-off / 0.06s node; the same arithmetic through guarded slots +// runs 0.32s (~7x headroom). Sound inlining needs proto-identity or +// proto-shape guards (a receiver has_shape proves nothing about the +// dictionary-mode proto carrying the getter) — a designed phase, not a +// measured extension. +function Pt(x, y) { this.x = x; this.y = y; } +Object.defineProperty(Pt.prototype, "len2", { + get: function () { return this.x * this.x + this.y * this.y; } +}); +function kern(p, n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + p.len2; + i = i + 1; + } + return s; +} +var out = 0; +var r = 0; +while (r < 20) { + out = out + kern(new Pt(r, r + 1), 1000000); + r = r + 1; +} +console.log(out); diff --git a/test/types/types-array1.js b/test/types/types-array1.js new file mode 100644 index 00000000..2853124d --- /dev/null +++ b/test/types/types-array1.js @@ -0,0 +1,27 @@ +// the shapes-plan P4.6 array-element-shapes EVIDENCE probe (the +// extension was measured and DEFERRED — see the plan's P4.6 entry). +// a[j] is a computed member — no shape machinery applies (arrays are +// exotics outside shaped mode, maam smashes element types). 2026-07-24 +// numbers (M-series, 20M reads): 0.57s --types / 1.38s flag-off / +// 0.06s node — real headroom, owned by a future typed-element-storage +// phase alongside the gc-plan work. +function kern(a, n) { + var s = 0; + var r = 0; + while (r < n) { + var j = 0; + while (j < 64) { + s = s + a[j]; + j = j + 1; + } + r = r + 1; + } + return s; +} +var arr = []; +var k = 0; +while (k < 64) { + arr.push(k * 1.5); + k = k + 1; +} +console.log(kern(arr, 312500)); diff --git a/test/types/types-bench3.js b/test/types/types-bench3.js new file mode 100644 index 00000000..27a342e2 --- /dev/null +++ b/test/types/types-bench3.js @@ -0,0 +1,27 @@ +// the shapes-plan P4.6 polymorphic microbenchmark: the types-bench2 +// kernel with TWO receiver classes alternating at one site ({x,y} and +// {z,x,y} — neither a transition-prefix of the other, and the shared +// fields at different slots). The oracle reports both terminal shapes; +// the 2-way guard chain gives each class a fixed-slot fast arm. +// 2026-07-24 numbers (M-series): 0.31s with the chain — parity with the +// monomorphic twin — vs 1.67s declined (EJS_NO_POLY_SHAPE_GUARDS=1) and +// 3.64s flag-off. +function P2(x, y) { this.x = x; this.y = y; } +function P3(x, y, z) { this.z = z; this.x = x; this.y = y; } +function kern(p, n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + p.x * p.x + p.y * p.y; + i = i + 1; + } + return s; +} +var out = 0; +var r = 0; +while (r < 20) { + out = out + kern(new P2(r, r + 1), 500000); + out = out + kern(new P3(r + 2, r + 3, r), 500000); + r = r + 1; +} +console.log(out); diff --git a/test/types/types-poly1.js b/test/types/types-poly1.js new file mode 100644 index 00000000..a1bb27f4 --- /dev/null +++ b/test/types/types-poly1.js @@ -0,0 +1,18 @@ +// the wrong-oracle probe for the P4.6 2-way polymorphic chain: lib.js's +// oracle typed sum/setx's receiver with TWO terminal shapes from its +// module-local calls, so both classes ride their own fast arm. Cross- +// module we hand the chain receivers it never saw — a repr-mismatched +// object, a third shape, a dictionary-mode (post-delete) object — and +// every one must route through the shared slow path with node-identical +// output; correctness never depends on the oracle being right. +import { sum, setx, mk2, mk3 } from "./types-poly1/lib"; +console.log(sum(mk2(1, 2))); // arm-1 fast: 3 +console.log(sum(mk3(10, 20, 30))); // arm-2 fast: 30 +console.log(sum({ x: "a", y: "b" })); // repr mismatch: slow, "ab" +console.log(sum({ x: 1, y: 2, w: 3 })); // a third shape: slow, 3 +var del = { x: 100, y: 200 }; +delete del.x; del.x = 7; // dictionary mode: guards fail +console.log(sum(del)); // 207 +console.log(setx(mk3(1, 2, 3), 42)); // arm-2 typed store: 42 +console.log(setx({ x: "s", y: 0 }, "t")); // non-number into the chain: slow, "t" +console.log(setx(del, 9)); // dictionary store: slow, 9 diff --git a/test/types/types-poly1/lib.js b/test/types/types-poly1/lib.js new file mode 100644 index 00000000..92382659 --- /dev/null +++ b/test/types/types-poly1/lib.js @@ -0,0 +1,14 @@ +// the oracle sees TWO terminal shapes for sum's receiver — P2 {x,y} and +// P3 {z,x,y}, distinct classes whose shared fields sit at different +// slots — so p.x / p.y lower to the P4.6 2-way guard chain: each class +// takes its own fast arm, everything else shares one generic slow path. +function P2(x, y) { this.x = x; this.y = y; } +function P3(x, y, z) { this.z = z; this.x = x; this.y = y; } +export function sum(p) { return p.x + p.y; } +export function setx(p, v) { p.x = v; return p.x; } +export function mk2(x, y) { return new P2(x, y); } +export function mk3(x, y, z) { return new P3(x, y, z); } +console.log(sum(mk2(1, 2))); // 3 — types the receiver with P2... +console.log(sum(mk3(10, 20, 5))); // 30 — ...and with P3 +console.log(setx(mk2(3, 4), 7)); // 7 (typed store, arm 1) +console.log(setx(mk3(5, 6, 7), 8)); // 8 (typed store, arm 2) From 338be7559fa25e4a1c4a19ab059508ed994d00cc Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 18:57:49 -0700 Subject: [PATCH 112/146] =?UTF-8?q?eir:=20gc-P0=20=E2=80=94=20generator-sc?= =?UTF-8?q?an=20fixes,=20GC=20profiling,=20runtime=20-O2=20(self-compile?= =?UTF-8?q?=203.06x)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Correctness (all latent mover-blockers, all real today; results doc has the full inventory): - collection while executing ON a generator stack segfaulted (mark_thread_stack scanned [&local, main-stack-bottom) across unmapped memory); the scan now stops at the running generator's stack end, and mark_generator_stacks (the 2015 'XXX mark the actual stack' stub) roots the active chain and scans each suspended caller segment recorded at the swap-in sites (gen->caller_stack_top) - _ejs_generator_start allocated the completion iter-result after popping the chain (same class); allocate-then-pop - the suspended-generator stack scan was INVERTED — [base, sp) covers the dead region; live frames at [sp, end) were invisible, so values held only by suspended frames were collectable (use-after-free on resume); fixed with clamping - LOS lookups honor interior pointers (exact-base match let a large object die under a derived-pointer-only reference) - push_generator aborts loudly at MAX_GENERATORS Pinned by generator23/24/25 (running / suspended / nested-chain), all node-identical and green under EJS_GC_EVERY_N_ALLOC=7. Instrumentation (EJS_GC_PROFILE=1): YOUNG + PINNED header bits from the gc-reserved range (57/58; all existing consumers mask); per-cycle line (live set, young alloc'd vs survived, pins by source cstack/regs/ genstack with env-interior/LOS/young-old splits, pause) + atexit summary (totals, rates, kind/size histograms). Off-path cost: one OR folded into the existing header store. The numbers (docs/gc-p0-results.md): self-compile = 79.5M allocs/ 3.42GB, 39% closureenv; steady-state young survival 2.4-3.4% of bytes; pins 100-650 objects (KBs) per cycle vs ~1M-object live sets ⇒ gc-P2 ships on conservative roots, P3 stays sequenced behind it. Runtime -O2 (defs.bzl, the plan's 'single cheapest speedup'): scanner assumptions re-verified under optimization (MARK_REGISTERS callee-saved spills, ABI-pinned live-across-call values, interior canonicalization, generator gc-stress green); self-compile 127.4s -> 41.6s (3.06x, with bit-identical 79,529,117-alloc profiles), types-bench2 2.00s -> 0.68s. Gate: matrix x7 green (incl. generator23-25 in every stage lane and the shapes-off lane); gc-plan P0 ticked. Co-Authored-By: Claude Fable 5 --- defs.bzl | 9 +- docs/gc-p0-results.md | 162 ++++++++++ docs/gc-plan.md | 24 +- runtime/ejs-gc.c | 363 +++++++++++++++++++++- runtime/ejs-generator.c | 39 ++- runtime/ejs-generator.h | 8 + test/expected/generator23.js.expected-out | 1 + test/expected/generator24.js.expected-out | 3 + test/expected/generator25.js.expected-out | 3 + test/generator23.js | 20 ++ test/generator24.js | 22 ++ test/generator25.js | 28 ++ 12 files changed, 651 insertions(+), 31 deletions(-) create mode 100644 docs/gc-p0-results.md create mode 100644 test/expected/generator23.js.expected-out create mode 100644 test/expected/generator24.js.expected-out create mode 100644 test/expected/generator25.js.expected-out create mode 100644 test/generator23.js create mode 100644 test/generator24.js create mode 100644 test/generator25.js diff --git a/defs.bzl b/defs.bzl index 1e237e8b..4f7a1bab 100644 --- a/defs.bzl +++ b/defs.bzl @@ -77,10 +77,15 @@ EJS_RUNLOOP_IMPL = select({ "config//os:macos": "darwin", }) -# Mirrors CFLAGS + per-target defines from mk/config.mk. +# Mirrors CFLAGS + per-target defines from mk/config.mk — except the +# optimization level: the runtime moved -O0 -> -O2 at gc-plan P0 (the +# plan's "single cheapest runtime speedup"; scanner assumptions +# re-verified there — MARK_REGISTERS spills callee-saved registers, the +# ABI pins live-across-call values to stack/callee-saved, and interior +# pointers canonicalize in both the page and (since P0) LOS lookups). EJS_COMPILER_FLAGS = [ "-g", - "-O0", + "-O2", "-Wall", "-Wno-unused-function", "-Wno-unused-variable", diff --git a/docs/gc-p0-results.md b/docs/gc-p0-results.md new file mode 100644 index 00000000..064519a8 --- /dev/null +++ b/docs/gc-p0-results.md @@ -0,0 +1,162 @@ +# gc-plan Phase 0 — correctness fixes + the measurement numbers + +2026-07-24, M-series macOS (arm64), buck2 + LLVM 22.1.8. All EJS-compiled +user code runs the normal `-O2` opt pipeline (the optimizer-on rule); the +runtime's own optimization level is the experiment's variable (`-O0` as +found → `-O2`, see below). + +## Correctness fixes (all latent-mover-blockers, all real today) + +1. **Collection while executing on a generator stack segfaulted.** + `mark_thread_stack` scanned `[&local, main-stack-bottom)`; on a + generator's malloc'd stack that range spans from the malloc heap + across unmapped memory. Reproduced with `EJS_GC_EVERY_N_ALLOC=7` on + a generator that allocates (signal 11 in `mark_ejsvals_in_range`, + backtrace even showed `_ejs_create_iter_result` — the alloc-after- + `pop_generator` completion path, bug 3 below). Fixed: when the + active-generator chain is non-empty the current-stack scan stops at + the running generator's stack end. +2. **The suspended main-stack segment was never scanned** while a + generator ran. Fixed: each swap-in site records the caller's stack + position (`gen->caller_stack_top`); `mark_generator_stacks` (the + 2015 "XXX mark the actual stack" stub) now roots each ACTIVE + generator object and scans each suspended caller segment up to its + stack's end (main's `stack_bottom` for the outermost, the parent + generator's stack end for nested resumes). +3. **`_ejs_generator_start` allocated the final iter-result AFTER + popping the generator chain** — same bogus-range class as (1) while + still on the generator stack. Fixed by allocating before the pop. +4. **The suspended-generator stack scan was inverted**: it scanned + `[stack_base, saved_SP)` — the DEAD region (stacks grow down) — so + the live frames of every suspended generator were invisible: values + referenced only by a suspended generator's frames could be collected + and resumed-into (use-after-free). Fixed to `[saved_SP, stack_end)` + with out-of-range SPs degrading to a whole-stack scan. +5. **LOS lookups now honor interior pointers** (`find_page_and_cell` + used an exact base match): a large object referenced only through a + derived pointer — likelier once the runtime is `-O2` and base values + die in registers — was collectable out from under the reference. + Interior hits canonicalize to the base (the page-cell path always + did this); the cost is a slightly larger conservative false-positive + surface, which a conservative collector accepts by construction. +6. `_ejs_gc_push_generator` now aborts loudly at MAX_GENERATORS instead + of silently corrupting the chain array. + +Pinned by suite tests `generator23.js` (GC while running on the +generator stack), `generator24.js` (suspended-frame-only liveness across +forced collections), `generator25.js` (nested active chain) — all +node-identical, all green under `EJS_GC_EVERY_N_ALLOC=7`. + +**Pinned, NOT fixed (pre-existing, outside gc scope):** an uncaught +exception thrown out of a generator body aborts the process (the +desugar's outer catch rethrows on the generator stack and the unwinder +walks off the makecontext frame; node prints the exception in the +caller). Recorded here so the exceptions/coroutine interaction gets an +owner later. + +## Instrumentation (EJS_GC_PROFILE=1) + +Two bits from the header's gc-reserved range (57-63; every existing +consumer masks): YOUNG — set at allocation, cleared on first survival, +so "young" = allocated since the last collection, exactly a nursery's +population; PINNED — set once per cycle per object hit by a +conservative reference (recorded even when already marked: the white +check is a marking optimization, not a pin filter). Per-cycle stderr +line: live set, young-allocated vs young-survived (count/bytes/%), pins +by source (cstack / regs / genstack) with env-interior, LOS, young/old +splits, pause. Shutdown summary (atexit): totals, rates, kind and +size-class histograms. The YOUNG-bit OR is folded into the header +store the allocator already does; everything else is behind the env +var — the measured path is unperturbed when profiling is off. + +## The numbers, runtime `-O0` (as found) + +**Self-compile** (stage1 `ejs.exe` compiling `ejs-es6.js`, the real +workload; 127.4s wall): + +- **79.5M allocations, 3,419MB** — 26.8MB/s, 624K allocs/s. +- Kinds: **object 47.5M (60%), closureenv 31.0M (39%)**, primstr 0.94M, + primsym 14. The env-churn hypothesis is confirmed: 2 of every 5 + allocations are closure environments — gc-P2's inline `make_env` + fast path targets the right thing. +- Sizes: ≤32B: 31.4M / 957MB; ≤64B: 42.9M / 2,022MB; ≤128B: 5.2M / + 440MB; **LOS: 2,489 / 0.86MB** — the heap is uniformly tiny-object. +- Survival: warmup cycles 33%/35%/12.5%, then **steady-state 2.5-3.5% + of young bytes survive** each ~60-110MB cycle — a nursery reclaims + ~97% of its space per minor GC on the compiler workload. +- **Pins: 100-650 objects (5-36KB) per cycle** out of ~1M-object live + sets — C-stack source dominates, registers contribute 1-5, + generator-stack 0 (none active), **env-interior 0**, LOS 0. The pin + population is 4-5 orders of magnitude smaller than the live set. +- Pauses: 240-770ms per cycle; total 9.2s = 7.2% of wall. + +**Kernels** (types-bench2 2.00s / types-bench3 0.31s under `--types`, +matching their P4.x records): 1.57M allocs per 60MB cycle, **young +survival 0.0-0.1%**, pins 13 objects, pauses ~21ms. + +**Generator kernel** (gens1small): allocations on the generator stack, +chain pins visible under stress; profile attributes genstack pins once +generators are suspended with live frames. + +## What the numbers decide (the plan's open orderings) + +- **gc-P2 (nursery + inline alloc) is GO, and P3 need NOT move ahead of + it**: the pin rate under pure conservative roots is trivially small + (≤650 objects/cycle, KBs), so premature-promotion erosion from pinned + young objects is negligible. Bartlett cell-pinning at this rate is + free; precise JS frames (gc-P3) remain a throughput/paranoia + improvement, not a prerequisite. +- **Inline allocation should cover `make_env` AND plain objects** + early: objects+envs are 99% of allocations. +- The LOS is irrelevant to the mover's economics today (2,489 allocs, + <1MB) — the P4.2 slot-cap workaround (field cap 14) stays until the + planned size-class/lookup work, with no added urgency from these + numbers. +- Marking cost (not sweep) dominates the pause at `-O0`; the `-O2` + runtime move (below) and later concurrent marking (gc-P6) both attack + it. + +## The `-O2` runtime experiment — LANDED + +Runtime moved `-O0` → `-O2` (`defs.bzl`), scanner assumptions +re-verified: `MARK_REGISTERS` spills callee-saved registers explicitly +(volatile asm), live-across-call values sit in callee-saved registers +or caller frames per the ABI (both scanned), interior pointers +canonicalize in page and (now) LOS lookups, and the generator stress +tests exercise collection from generator stacks under optimization +(generator23-25 + EJS_GC_EVERY_N_ALLOC=7 all green on the -O2 build). + +**Results:** + +- **Self-compile: 127.4s → 41.6s wall (3.06×).** The allocation totals + are bit-identical between the runs (79,529,117 allocs / 3,419.54MB — + the workload is deterministic, which doubles as an instrumentation + sanity check). Total pause 9.2s → 6.05s (240-770ms → 140-608ms per + cycle); survival and pin profiles unchanged (steady-state 2.4-3.4% + young-byte survival; pins 380-530 objects/cycle, cstack-sourced, + `regs` drops to 0 — the optimized runtime holds fewer stray ejsvals + in callee-saved registers at the collection point; env-interior + still 0). +- **types-bench2 (--types): 2.00s → 0.68s (2.9×)** — most of what P4.5 + recorded as the "1.71s allocation-loop residual" was runtime `-O0` + overhead, not intrinsic allocation cost. types-bench3: 0.31s → + 0.18s. (Flag-off bench2: 6.7s → measured on the -O2 runtime at the + gate as well.) +- The `-O2` flip is kept (defs.bzl comment records the P0 verification); + gc-P2's inline-allocation gate ("strictly better than the free-list + path") must be measured against THIS baseline. + +Measurement gotchas recorded for future phases: the EIR optimizer sinks +non-escaping allocations, so a churn kernel can profile as ~zero allocs +(size the probe's escapes deliberately — the optimizer-on rule cuts +both ways); survived-bytes are cell-size-accounted while allocated-bytes +are request-accounted, so tiny survivor sets can read as >100% on +sub-KB cycles (harmless at real scales). + +## Phase checklist impact + +- gc-plan P0: DONE (this doc). P1's remaining scope: forwarding + helpers only (the 64-bit header + reserved bits + lib/types.ts + lockstep landed with shapes P4.1). +- gc-P2 proceeds with conservative roots; P3 stays sequenced after + (pin-rate evidence above). diff --git a/docs/gc-plan.md b/docs/gc-plan.md index eeabbe91..0684ce4f 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -431,7 +431,9 @@ GC, and these are cheap: collector itself. The conservative scanner's assumptions (register spills, no hidden pointer representations) must be re-verified under `-O2` — do it in Phase 0 while instrumentation is fresh. LTO across runtime/user-code is a - further step with the same caveat. + further step with the same caveat. *(DONE at P0: `-O2` landed after + verification — self-compile 3.06× faster, types-bench2 2.9×; see + gc-p0-results.md. LTO remains open.)* - **`env_load`/`env_store` runtime-call round-trip** — inline the slot address computation (also required for precise roots; see above). Can land early and alone. @@ -454,6 +456,15 @@ through Phase 3 for A/B and differential testing. for what would be young vs. old. Run the `-O2`-runtime experiment and re-verify scanner assumptions. **Gate: the numbers.** They size the payoff of every later phase and decide how early precise JS frames need to land. + **DONE 2026-07-24 — docs/gc-p0-results.md.** The generator work found + FOUR bugs (crash on collect-during-generator-execution; unscanned + suspended main segment; alloc-after-pop on completion; and the + suspended-stack scan bounds INVERTED — it scanned the dead region and + missed every live frame), pinned by generator23-25 under gc-stress; + LOS lookups made interior-tolerant. The numbers: 2.4-3.4% steady + young survival, 39% closureenv allocation share, pins in the hundreds + of objects/KBs per cycle (⇒ P2 ships on conservative roots; P3 stays + behind it), and the `-O2` runtime landed at 3.06× on the self-compile. - **Phase 1 — Header widening + forwarding plumbing.** 64-bit header, bits reserved per the shapes tie-in; coordinated `runtime/` + `lib/types.ts` @@ -581,9 +592,18 @@ bounds as needed. ## Phase checklist (for /goal sessions) -- [ ] **P0** generator-stack fix; alloc/survival/pin instrumentation (optimizer +- [x] **P0** generator-stack fix; alloc/survival/pin instrumentation (optimizer on); `-O2`-runtime experiment + scanner re-verification. *Gate:* matrix green; numbers recorded in this doc or a results doc. + DONE 2026-07-24 — docs/gc-p0-results.md has the numbers. Headlines: + four latent generator-scan bugs fixed (collection-on-generator-stack + segfaulted; the suspended-stack scan was INVERTED — dead region + scanned, live frames missed) + LOS interior-pointer tolerance; + profile: self-compile = 79.5M allocs/3.4GB, 39% closureenv, + steady-state young survival 2.4-3.4% of bytes, pins 380-650 + objects/cycle (KBs — conservative pinning is a non-issue, so P2 + proceeds WITHOUT P3); runtime `-O2` landed: self-compile 127s→42s + (3.06×), types-bench2 2.00s→0.68s. - [ ] **P1** 64-bit header (+ reserved shape/trace bits) + `lib/types.ts` lockstep; forwarding helpers. *Gate:* matrix green, all three bootstrap targets. diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index dbbbe0f1..d0c56061 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -364,6 +364,13 @@ struct _LargeObjectInfo { static EJSList heap_pages[HEAP_PAGELISTS_COUNT]; static LargeObjectInfo *los_list; +// gc-plan P0 instrumentation state (definitions live with the profile +// block further down, before the mark helpers use them) +static EJSBool gc_profile; +static struct timeval prof_start_tv; +static void profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw); +static void profile_report_shutdown(void); + void* ptr_to_arena(void* ptr) { return PTR_TO_ARENA(ptr); } void* ptr_to_arena_page_base(void* ptr) { return PTR_TO_ARENA_PAGE_BASE(ptr); } uintptr_t ptr_to_arena_page_index(void* ptr) { return PTR_TO_ARENA_PAGE_INDEX(ptr); } @@ -545,10 +552,16 @@ find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) return page; } - // check if it's in the LOS + // check if it's in the LOS. Interior pointers match too (gc-plan + // P0): a conservative reference may be a derived pointer whose base + // value the optimizer discarded — with an exact-base match a large + // object referenced ONLY through an interior pointer (e.g. a flat + // string's data) would be collected out from under it. Callers + // canonicalize through cell_idx 0, so an interior hit marks the base. LOCK_GC(); for (LargeObjectInfo *lobj = los_list; lobj; lobj = lobj->next) { - if (lobj->page_info.page_start == ptr) { + void* start = lobj->page_info.page_start; + if (ptr >= start && ptr < start + lobj->page_info.cell_size) { UNLOCK_GC(); if (cell_idx) *cell_idx = 0; @@ -710,6 +723,14 @@ _ejs_gc_init() if (n_allocs) collect_every_alloc = atoi(n_allocs); + // gc-plan P0: allocation/survival/pin instrumentation. The summary + // goes through atexit because _ejs_gc_shutdown is compiled out by + // default (GC_ON_SHUTDOWN in main.c). + gc_profile = getenv("EJS_GC_PROFILE") != NULL; + gettimeofday (&prof_start_tv, NULL); + if (gc_profile) + atexit (profile_report_shutdown); + // allocate an initial arenas for (int i = 0; i < 10; i ++) arena_new(); @@ -823,6 +844,12 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) // XXX more checks before we start treating the pointer like a GCObjectPtr? BitmapCell cell = page->page_bitmap[cell_idx]; if (IS_FREE(cell)) continue; // skip free cells + + // gc-P0: a conservative hit pins under the mover — recorded even + // when the target is already marked (the white check below is a + // marking optimization, not a pin filter) + if (gc_profile) profile_note_pin(page, cell_idx, gcptr); + if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells // canonicalize interior pointers to the start of their cell; the @@ -864,6 +891,11 @@ mark_ejsvals_in_range(void* low, void* high) // XXX more checks before we start treating the pointer like a GCObjectPtr? BitmapCell cell = page->page_bitmap[cell_idx]; if (IS_FREE(cell)) continue; // skip free cells + + // gc-P0: a conservative hit pins under the mover — recorded + // even when the target is already marked + if (gc_profile) profile_note_pin(page, cell_idx, gcptr); + if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells // canonicalize interior pointers to the start of their cell; the @@ -885,6 +917,219 @@ static int num_closureenv_allocs = 0; static int num_primstr_allocs = 0; static int num_primsym_allocs = 0; +// ---- gc-plan P0: measurement instrumentation (EJS_GC_PROFILE=1) ----------- +// +// Two header bits from the gc-reserved range (57-63; see ejs-types.h — the +// shapes machinery masks its 24-bit index, so these are invisible to it): +// +// YOUNG: set at allocation, cleared on the first collection the object +// survives. "young" therefore means "allocated since the last +// collection" — exactly the population a generational nursery +// (gc-P2) would manage, so per-cycle young-survival is THE +// number that sizes the nursery payoff. +// PINNED: set (once per cycle) when a CONSERVATIVE reference — C stack, +// spilled registers, generator stacks/contexts — hits the +// object. Under the mover these are the objects that cannot +// be evacuated this cycle; their count/bytes/sources size the +// payoff of precise JS frames (gc-P3) and decide its ordering. +// +// The YOUNG bit is set unconditionally (an OR folded into the header +// store the allocator already does); everything else is gated on +// gc_profile so the measured path stays clean when profiling is off. +#define EJS_GC_HEADER_YOUNG (1ULL << 57) +#define EJS_GC_HEADER_PINNED (1ULL << 58) + +enum { + PROF_SRC_CSTACK = 0, // conservative C-stack ranges (incl. suspended segments) + PROF_SRC_REGS = 1, // spilled register file + PROF_SRC_GENSTACK = 2, // suspended generator stacks + saved ucontexts + PROF_SRC_COUNT +}; +static const char* prof_src_names[PROF_SRC_COUNT] = { "cstack", "regs", "genstack" }; +static int prof_pin_source = PROF_SRC_CSTACK; + +#define PROF_NBUCKETS 12 // ffs buckets 16B.. + [0] = LOS +static uint64_t prof_alloc_count[PROF_NBUCKETS]; +static uint64_t prof_alloc_bytes[PROF_NBUCKETS]; +static uint64_t prof_kind_count[4]; // primstr, primsym, object, closureenv +static uint64_t prof_alloc_total_count = 0; +static uint64_t prof_alloc_total_bytes = 0; +// the young population: allocations since the last collection +static uint64_t prof_young_count = 0; +static uint64_t prof_young_bytes = 0; +// per-cycle pin accounting (reset after each report) +static uint64_t prof_pin_count[PROF_SRC_COUNT]; +static uint64_t prof_pin_bytes[PROF_SRC_COUNT]; +static uint64_t prof_pin_young = 0, prof_pin_old = 0; +static uint64_t prof_pin_env_interior = 0, prof_pin_los = 0; +static uint64_t prof_collections = 0; +static uint64_t prof_total_pause_usec = 0; +static const char* prof_gc_reason = "?"; + +static void +profile_note_alloc(size_t size, int ffs_bucket, EJSScanType scan_type) +{ + int idx; + if (ffs_bucket > OBJECT_SIZE_HIGH_LIMIT_BITS) + idx = 0; // LOS + else { + idx = ffs_bucket - OBJECT_SIZE_LOW_LIMIT_BITS; + if (idx < 1) idx = 1; + if (idx >= PROF_NBUCKETS) idx = PROF_NBUCKETS - 1; + } + prof_alloc_count[idx]++; + prof_alloc_bytes[idx] += size; + prof_alloc_total_count++; + prof_alloc_total_bytes += size; + switch (scan_type) { + case EJS_SCAN_TYPE_PRIMSTR: prof_kind_count[0]++; break; + case EJS_SCAN_TYPE_PRIMSYM: prof_kind_count[1]++; break; + case EJS_SCAN_TYPE_OBJECT: prof_kind_count[2]++; break; + case EJS_SCAN_TYPE_CLOSUREENV: prof_kind_count[3]++; break; + } + prof_young_count++; + prof_young_bytes += size; +} + +// a conservative reference hit an allocated cell: under the mover this +// object is pinned for the cycle. counted once per cycle per object +// (dedupe via the PINNED header bit), attributed to the scan source that +// found it first, split young/old, with env-interior-pointer and LOS +// sub-counts. runs BEFORE the white-check filter: a hit on an +// already-marked object still pins it. +static void +profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw) +{ + GCObjectPtr base = page->page_start + (cell_idx * page->cell_size); + GCObjectHeader* h = (GCObjectHeader*)base; + if (*h & EJS_GC_HEADER_PINNED) + return; + *h |= EJS_GC_HEADER_PINNED; + prof_pin_count[prof_pin_source]++; + prof_pin_bytes[prof_pin_source] += page->cell_size; + if (*h & EJS_GC_HEADER_YOUNG) prof_pin_young++; else prof_pin_old++; + if (raw != base && (*h & EJS_SCAN_TYPE_CLOSUREENV)) prof_pin_env_interior++; + if (page->los_info) prof_pin_los++; +} + +// per-cycle results filled by profile_pre_sweep (which must run after +// marking and BEFORE the sweep frees the dead cells), printed with the +// pause by profile_report_cycle_end +static uint64_t prof_cycle_live_count, prof_cycle_live_bytes; +static uint64_t prof_cycle_ysurv_count, prof_cycle_ysurv_bytes; + +static void +profile_visit_live_cell(GCObjectHeader* h, size_t bytes) +{ + prof_cycle_live_count++; + prof_cycle_live_bytes += bytes; + if (*h & EJS_GC_HEADER_YOUNG) { + prof_cycle_ysurv_count++; + prof_cycle_ysurv_bytes += bytes; + *h &= ~EJS_GC_HEADER_YOUNG; // survived one collection: no longer young + } + *h &= ~EJS_GC_HEADER_PINNED; // reset for the next cycle +} + +static void +profile_pre_sweep(void) +{ + prof_cycle_live_count = prof_cycle_live_bytes = 0; + prof_cycle_ysurv_count = prof_cycle_ysurv_bytes = 0; + for (int i = 0; i < HEAP_PAGELISTS_COUNT; i++) { + EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { + BitmapCell cell = page->page_bitmap[c]; + if (IS_FREE(cell) || IS_WHITE(cell)) continue; + profile_visit_live_cell((GCObjectHeader*)p, page->cell_size); + } + }); + } + for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { + BitmapCell cell = lobj->page_info.page_bitmap[0]; + if (IS_FREE(cell) || IS_WHITE(cell)) continue; + profile_visit_live_cell((GCObjectHeader*)lobj->page_info.page_start, + lobj->page_info.cell_size); + } +} + +static void +profile_report_cycle_end(uint64_t pause_usec) +{ + prof_collections++; + prof_total_pause_usec += pause_usec; + double surv_pct = prof_young_bytes + ? 100.0 * (double)prof_cycle_ysurv_bytes / (double)prof_young_bytes : 0.0; + _ejs_log ("EJS_GC_PROFILE: gc#%llu reason=%s pause=%.2fms " + "live=%llu objs/%.2fMB | young allocd=%llu/%.2fMB " + "survived=%llu/%.2fMB (%.1f%% of bytes) | pins: " + "cstack=%llu/%lluKB regs=%llu/%lluKB genstack=%llu/%lluKB " + "envint=%llu los=%llu young=%llu old=%llu\n", + (unsigned long long)prof_collections, prof_gc_reason, + pause_usec / 1000.0, + (unsigned long long)prof_cycle_live_count, + prof_cycle_live_bytes / (1024.0 * 1024.0), + (unsigned long long)prof_young_count, + prof_young_bytes / (1024.0 * 1024.0), + (unsigned long long)prof_cycle_ysurv_count, + prof_cycle_ysurv_bytes / (1024.0 * 1024.0), + surv_pct, + (unsigned long long)prof_pin_count[PROF_SRC_CSTACK], + (unsigned long long)(prof_pin_bytes[PROF_SRC_CSTACK] / 1024), + (unsigned long long)prof_pin_count[PROF_SRC_REGS], + (unsigned long long)(prof_pin_bytes[PROF_SRC_REGS] / 1024), + (unsigned long long)prof_pin_count[PROF_SRC_GENSTACK], + (unsigned long long)(prof_pin_bytes[PROF_SRC_GENSTACK] / 1024), + (unsigned long long)prof_pin_env_interior, + (unsigned long long)prof_pin_los, + (unsigned long long)prof_pin_young, + (unsigned long long)prof_pin_old); + prof_young_count = prof_young_bytes = 0; + memset (prof_pin_count, 0, sizeof (prof_pin_count)); + memset (prof_pin_bytes, 0, sizeof (prof_pin_bytes)); + prof_pin_young = prof_pin_old = 0; + prof_pin_env_interior = prof_pin_los = 0; +} + +static void +profile_report_shutdown(void) +{ + static EJSBool reported = EJS_FALSE; // atexit + GC_ON_SHUTDOWN may both fire + if (reported) return; + reported = EJS_TRUE; + + struct timeval now; + gettimeofday (&now, NULL); + double wall = (now.tv_sec - prof_start_tv.tv_sec) + + (now.tv_usec - prof_start_tv.tv_usec) / 1e6; + _ejs_log ("EJS_GC_PROFILE: totals: allocs=%llu bytes=%.2fMB wall=%.2fs " + "(%.1fMB/s, %.0f allocs/s) collections=%llu total-pause=%.2fms\n", + (unsigned long long)prof_alloc_total_count, + prof_alloc_total_bytes / (1024.0 * 1024.0), wall, + prof_alloc_total_bytes / (1024.0 * 1024.0) / (wall > 0 ? wall : 1), + prof_alloc_total_count / (wall > 0 ? wall : 1), + (unsigned long long)prof_collections, + prof_total_pause_usec / 1000.0); + _ejs_log ("EJS_GC_PROFILE: kinds: primstr=%llu primsym=%llu object=%llu " + "closureenv=%llu\n", + (unsigned long long)prof_kind_count[0], + (unsigned long long)prof_kind_count[1], + (unsigned long long)prof_kind_count[2], + (unsigned long long)prof_kind_count[3]); + for (int i = 1; i < PROF_NBUCKETS; i++) { + if (!prof_alloc_count[i]) continue; + _ejs_log ("EJS_GC_PROFILE: size<=%4d: %llu allocs, %.2fMB requested\n", + 1 << (OBJECT_SIZE_LOW_LIMIT_BITS + i - 1), + (unsigned long long)prof_alloc_count[i], + prof_alloc_bytes[i] / (1024.0 * 1024.0)); + } + if (prof_alloc_count[0]) + _ejs_log ("EJS_GC_PROFILE: LOS: %llu allocs, %.2fMB requested\n", + (unsigned long long)prof_alloc_count[0], + prof_alloc_bytes[0] / (1024.0 * 1024.0)); +} + static void sweep_heap() @@ -1057,16 +1302,6 @@ mark_from_modules() #error "put code here to mark registers" #endif -static void -mark_thread_stack() -{ - MARK_REGISTERS; - - GCObjectPtr stack_top = NULL; - - mark_ejsvals_in_range(((void*)&stack_top) + sizeof(GCObjectPtr), stack_bottom); -} - #define MAX_GENERATORS 256 static int generator_count = 0; static EJSGenerator* generators[MAX_GENERATORS]; @@ -1074,6 +1309,10 @@ static EJSGenerator* generators[MAX_GENERATORS]; void _ejs_gc_push_generator(EJSGenerator* gen) { + if (generator_count >= MAX_GENERATORS) { + _ejs_log ("too many nested generators (max %d)\n", MAX_GENERATORS); + abort(); + } generators[generator_count++] = gen; } @@ -1083,13 +1322,75 @@ _ejs_gc_pop_generator() generator_count--; } +static void +mark_thread_stack() +{ + prof_pin_source = PROF_SRC_REGS; + MARK_REGISTERS; + prof_pin_source = PROF_SRC_CSTACK; + + GCObjectPtr stack_top = NULL; + + // The CURRENT machine stack. When the mutator is running on a + // generator's malloc'd stack (collections happen inside + // _ejs_gc_alloc, which generator bodies call), [&stack_top, + // stack_bottom) is NOT a stack range — it spans from the malloc heap + // to the main stack across unmapped memory. Scan only up to the + // running generator's stack end; mark_generator_stacks covers the + // suspended caller segments (gc-plan P0). + void* high = (void*)stack_bottom; + if (generator_count > 0) { + EJSGenerator* running = generators[generator_count - 1]; + high = running->stack + running->stack_size; + } + + mark_ejsvals_in_range(((void*)&stack_top) + sizeof(GCObjectPtr), high); +} + +// mark a known heap object as a root (page cell or LOS both resolve +// through find_page_and_cell; the pointer must be an object base) +static void +mark_object_root(GCObjectPtr ptr) +{ + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(ptr, &cell_idx); + if (!page) + return; + BitmapCell cell = page->page_bitmap[cell_idx]; + if (IS_FREE(cell) || !IS_WHITE(cell)) + return; + WORKLIST_PUSH_AND_GRAY_CELL(ptr, page->page_bitmap[cell_idx]); +} + +// The chain of ACTIVE generators (generators whose bodies are on the +// current stack chain; push on start/resume, pop on yield/completion — +// generators[generator_count-1] owns the stack we are executing on). +// mark_thread_stack scans the running stack; this covers the rest: +// +// - each active generator OBJECT is a root for the cycle (its specop +// scan conservatively marks its own suspended frames and both saved +// ucontexts, i.e. the register files); +// - the SUSPENDED CALLER segment behind each swap-in: frames from the +// caller_stack_top recorded at the resume site up to that caller's +// stack end — the main stack (stack_bottom) for the outermost +// generator, the parent generator's stack end for nested ones. +// +// Suspended generators NOT in the chain need nothing here: if their +// object is reachable its scan covers their stack; if it is not, nothing +// on that stack is reachable either. static void mark_generator_stacks() { + prof_pin_source = PROF_SRC_CSTACK; // the suspended segments ARE C stack for (int i = 0; i < generator_count; i++) { - // EJSGenerator* gen = generators[i]; - - // XXX mark the actual stack + EJSGenerator* gen = generators[i]; + + mark_object_root((GCObjectPtr)gen); + + void* seg_high = (i == 0) ? (void*)stack_bottom + : generators[i - 1]->stack + generators[i - 1]->stack_size; + if (gen->caller_stack_top) + mark_ejsvals_in_range(gen->caller_stack_top, seg_high); } } @@ -1132,6 +1433,10 @@ _ejs_gc_collect_inner(EJSBool shutting_down) gettimeofday (&tvbefore, NULL); #endif + struct timeval prof_tv_begin, prof_tv_end; + if (gc_profile) + gettimeofday (&prof_tv_begin, NULL); + if (!shutting_down) { mark_from_roots(); @@ -1144,6 +1449,11 @@ _ejs_gc_collect_inner(EJSBool shutting_down) mark_generator_stacks(); process_worklist(); + + // gc-P0: survival + pin census must walk the heap BEFORE the + // sweep frees the white cells + if (gc_profile) + profile_pre_sweep(); } #if gc_timings > 1 @@ -1165,6 +1475,13 @@ _ejs_gc_collect_inner(EJSBool shutting_down) sweep_heap(); + if (gc_profile && !shutting_down) { + gettimeofday (&prof_tv_end, NULL); + uint64_t usec = (prof_tv_end.tv_sec - prof_tv_begin.tv_sec) * 1000000ULL + + (prof_tv_end.tv_usec - prof_tv_begin.tv_usec); + profile_report_cycle_end (usec); + } + #if gc_timings > 1 { gettimeofday (&tvafter, NULL); @@ -1255,6 +1572,7 @@ void _ejs_gc_collect(const char *reason) { SPEW(1, _ejs_log ("_ejs_gc_collect(%s)\n", reason)); + prof_gc_reason = reason; #if gc_timings > 0 struct timeval tvbefore, tvafter; @@ -1291,6 +1609,9 @@ _ejs_gc_shutdown() _ejs_gc_collect_inner(EJS_TRUE); SPEW(1, _ejs_log ("total allocs = %d\n", total_allocs)); + if (gc_profile) + profile_report_shutdown(); + _ejs_log ("gc allocation stats (_ejs_gc_shutdown):\n"); _ejs_log (" objects: %d\n", num_object_allocs); _ejs_log (" closureenv: %d\n", num_closureenv_allocs); @@ -1381,7 +1702,7 @@ alloc_from_los(size_t size, EJSScanType scan_type) SET_WHITE(rv->page_info.page_bitmap[0]); SET_ALLOCATED(rv->page_info.page_bitmap[0]); - *((GCObjectHeader*)rv->page_info.page_start) = scan_type; + *((GCObjectHeader*)rv->page_info.page_start) = scan_type | EJS_GC_HEADER_YOUNG; rv->alloc_size = size; @@ -1439,6 +1760,9 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) bucket = ffs(bucket_size); + if (gc_profile) + profile_note_alloc(size, bucket, scan_type); + retry_allocation: { if (bucket > OBJECT_SIZE_HIGH_LIMIT_BITS) { @@ -1490,7 +1814,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) // (any allocation between _ejs_gc_alloc and _ejs_init_object can // trigger one). zeroed contents are inert to the scanner. memset (rv, 0, info->cell_size); - *((GCObjectHeader*)rv) = scan_type; + *((GCObjectHeader*)rv) = scan_type | EJS_GC_HEADER_YOUNG; if (info->num_free_cells == 0) { // if the page is full, bump it to the end of the list (if there's more than 1 page in the list) @@ -1530,7 +1854,12 @@ _ejs_gc_remove_root(ejsval* root) void _ejs_gc_mark_conservative_range(void* low, void* high) { + // only the generator scan uses this entry point (suspended stacks + + // saved ucontexts) — attribute its pins accordingly + int prev_src = prof_pin_source; + prof_pin_source = PROF_SRC_GENSTACK; mark_ejsvals_in_range(low, high); + prof_pin_source = prev_src; } static int diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 3a1b7c02..d844fefe 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -122,12 +122,16 @@ _ejs_generator_start(EJSGenerator* gen) _ejs_gc_push_generator(gen); ejsval undef_this = _ejs_undefined; ejsval rv = _ejs_invoke_closure(gen->body, &undef_this, 0, NULL, _ejs_undefined); - _ejs_gc_pop_generator(); // the body's return value is the final iteration result's value - // (`function* g() { return 5; }` -> { value: 5, done: true }) + // (`function* g() { return 5; }` -> { value: 5, done: true }). + // The iter result is allocated BEFORE the generator leaves the active + // chain: we are still executing on the generator's stack here, and a + // collection triggered by this allocation must know that (gc-plan P0 — + // mark_thread_stack's range depends on the chain). gen->completed = EJS_TRUE; gen->yielded_value = _ejs_create_iter_result(rv, _ejs_true); + _ejs_gc_pop_generator(); } // makecontext's variadic arguments are ints, so a 64-bit pointer passed @@ -156,6 +160,8 @@ _ejs_generator_new (ejsval generator_body) rv->sent_value = _ejs_undefined; rv->stack = malloc(GENERATOR_STACK_SIZE); + rv->stack_size = GENERATOR_STACK_SIZE; + rv->caller_stack_top = NULL; getcontext(&rv->generator_context); rv->generator_context.uc_stack.ss_sp = rv->stack; rv->generator_context.uc_stack.ss_size = GENERATOR_STACK_SIZE; @@ -200,6 +206,7 @@ _ejs_generator_send (ejsval generator, ejsval arg) { gen->started = EJS_TRUE; gen->yielded_value = _ejs_undefined; gen->sent_value = arg; + gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); return gen->yielded_value; } @@ -210,6 +217,7 @@ _ejs_generator_throw (ejsval generator, ejsval arg) { gen->yielded_value = _ejs_undefined; gen->sent_value = arg; gen->throwing = EJS_TRUE; + gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); return gen->yielded_value; } @@ -272,6 +280,7 @@ static EJS_NATIVE_FUNC(_ejs_Generator_prototype_return) { gen->returning = EJS_TRUE; gen->yielded_value = _ejs_undefined; gen->sent_value = arg; + gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); return gen->yielded_value; } @@ -359,31 +368,41 @@ _ejs_generator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) _ejs_gc_mark_conservative_range(&gen->caller_context, (char*)&gen->caller_context + sizeof(ucontext_t)); if (gen->stack) { - _ejs_gc_mark_conservative_range(gen->stack, + void* stack_end = gen->stack + gen->stack_size; + void* saved_sp = #if __APPLE__ #if TARGET_CPU_AMD64 - (void*)gen->generator_context.__mcontext_data.__ss.__rsp + (void*)gen->generator_context.__mcontext_data.__ss.__rsp #elif TARGET_CPU_X86 - (void*)gen->generator_context.__mcontext_data.__ss.__esp + (void*)gen->generator_context.__mcontext_data.__ss.__esp #elif TARGET_CPU_ARM - (void*)gen->generator_context.__mcontext_data.__ss.__sp + (void*)gen->generator_context.__mcontext_data.__ss.__sp #elif TARGET_CPU_ARM64 - (void*)gen->generator_context.__mcontext_data.__ss.__sp + (void*)gen->generator_context.__mcontext_data.__ss.__sp #else #error "unimplemented darwin cpu arch" #endif #elif linux #if TARGET_CPU_AMD64 - (void*)gen->generator_context.uc_mcontext.gregs[REG_RSP] + (void*)gen->generator_context.uc_mcontext.gregs[REG_RSP] #elif TARGET_CPU_ARM64 - (void*)gen->generator_context.uc_mcontext.sp + (void*)gen->generator_context.uc_mcontext.sp #else #error "unimplemented linux cpu arch" #endif #else #error "unimplemented platform" #endif - ); + ; + // The stack grows DOWN: the live suspended frames sit between the + // suspension SP and the stack's END. (This scan used to cover + // [stack, sp) — the dead region — and so missed every live frame; + // gc-plan P0.) An SP outside the range (never-started context, + // garbage) degrades to scanning the whole stack, which is merely + // conservative. + if (saved_sp < gen->stack || saved_sp > stack_end) + saved_sp = gen->stack; + _ejs_gc_mark_conservative_range(saved_sp, stack_end); } _ejs_Object_specops.Scan (obj, scan_func); diff --git a/runtime/ejs-generator.h b/runtime/ejs-generator.h index 9e9734af..2bff082b 100644 --- a/runtime/ejs-generator.h +++ b/runtime/ejs-generator.h @@ -37,6 +37,14 @@ typedef struct { EJSBool completed; void* stack; + size_t stack_size; + + // the caller-side stack position recorded just before each swap INTO + // this generator (the address of a local in the resuming frame). While + // the generator runs, its caller's frames live ABOVE this address (the + // stack grows down) — the GC scans [caller_stack_top, caller's stack + // end) to cover the suspended segment (gc-plan P0). + void* caller_stack_top; ucontext_t generator_context; ucontext_t caller_context; diff --git a/test/expected/generator23.js.expected-out b/test/expected/generator23.js.expected-out new file mode 100644 index 00000000..b0918d9b --- /dev/null +++ b/test/expected/generator23.js.expected-out @@ -0,0 +1 @@ +0,1000,2000,3000,78000 diff --git a/test/expected/generator24.js.expected-out b/test/expected/generator24.js.expected-out new file mode 100644 index 00000000..eb60c3fd --- /dev/null +++ b/test/expected/generator24.js.expected-out @@ -0,0 +1,3 @@ +0 +12348 +before diff --git a/test/expected/generator25.js.expected-out b/test/expected/generator25.js.expected-out new file mode 100644 index 00000000..83bc2e06 --- /dev/null +++ b/test/expected/generator25.js.expected-out @@ -0,0 +1,3 @@ +30 +in3 +10 diff --git a/test/generator23.js b/test/generator23.js new file mode 100644 index 00000000..86b79e68 --- /dev/null +++ b/test/generator23.js @@ -0,0 +1,20 @@ +// gc-plan P0: a collection triggered while EXECUTING ON the generator's +// malloc'd stack (generator bodies call _ejs_gc_alloc). Before the P0 fix +// mark_thread_stack scanned [&local, main-stack-bottom) from the generator +// stack — a bogus range spanning unmapped memory: instant segfault under +// EJS_GC_EVERY_N_ALLOC=7, silent overscan otherwise. +function* g() { + var keep = []; + for (var i = 0; i < 4000; i++) { + keep.push({ a: i, b: i + 1 }); + if (i % 1000 === 0) yield i; + } + var sum = 0; + for (var j = 0; j < keep.length; j += 100) sum += keep[j].a; + yield sum; +} +var it = g(); +var r = it.next(); +var out = []; +while (!r.done) { out.push(r.value); r = it.next(); } +console.log(out.join(",")); diff --git a/test/generator24.js b/test/generator24.js new file mode 100644 index 00000000..53bc896b --- /dev/null +++ b/test/generator24.js @@ -0,0 +1,22 @@ +// gc-plan P0: values whose ONLY references live in a SUSPENDED +// generator's stack frames must survive collections forced from the main +// stack. Before the P0 fix the suspended-stack scan covered [stack, sp) +// — the dead region below the suspension point — missing every live frame. +function* h() { + var local = { x: 12345, s: "before" }; + var arr = [1, 2, 3]; + yield 0; + yield local.x + arr.length; + yield local.s; +} +function churn(n) { + var t = 0; + for (var i = 0; i < n; i++) { var o = { p: i, q: [i, i] }; t += o.p; } + return t; +} +var it = h(); +console.log(it.next().value); +churn(8000); +console.log(it.next().value); +churn(8000); +console.log(it.next().value); diff --git a/test/generator25.js b/test/generator25.js new file mode 100644 index 00000000..84a21a5e --- /dev/null +++ b/test/generator25.js @@ -0,0 +1,28 @@ +// gc-plan P0: NESTED active generators — the collector must cover the +// whole stack chain: the running stack, each suspended parent generator's +// segment, and the suspended main-stack segment behind the outermost +// resume site. +// nested active generators: A's body drives B while both hold stack-only refs +function* inner(base) { + var box = { v: base * 10, tag: "in" + base }; + yield box.v; + yield box.tag; +} +function* outer() { + var mine = { w: 7, s: [1, 2, 3] }; + var it = inner(3); + yield it.next().value; // B active inside A + yield it.next().value; + yield mine.w + mine.s.length; +} +function churn(n) { + var t = 0; + for (var i = 0; i < n; i++) { var o = { p: i }; t += o.p % 3; } + return t; +} +var it = outer(); +console.log(it.next().value); +churn(6000); +console.log(it.next().value); +churn(6000); +console.log(it.next().value); From 46fa47ee0915250ca5409b11fa0808832b38b484 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Fri, 24 Jul 2026 19:15:28 -0700 Subject: [PATCH 113/146] =?UTF-8?q?eir:=20gc-P1=20=E2=80=94=20forwarding?= =?UTF-8?q?=20plumbing=20(header=20half=20landed=20with=20shapes=20P4.1)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Bit 59 = FORWARDED: an evacuated object's first word becomes the forwarding record — target address in bits 0-46 (heap addresses live below 2^47 by the NaN-boxing rule, so the discriminator bit above the address range is unambiguous), read through _ejs_gc_is_forwarded / _ejs_gc_forwarding_addr, written by _ejs_gc_forward (ejs-gc.h, static inline). Inert until gc-P2's evacuation loop; exercised at init under EJS_GC_SELFTEST=1 so a layout break fails loudly today rather than in the mover. ejs-types.h now documents the complete 64-bit header inventory: 0-31 legacy scan-type/user-flags, 32-55 shape index, 56 shaped-storage mode, 57 YOUNG / 58 PINNED (gc-P0 profiling), 59 FORWARDED, 60-63 free for mark/card (gc-P2+). Gate: local matrix x7 green; linux targets ride the CI bootstrap matrix on push. gc-plan P1 ticked — next is gc-P2, the payoff phase (nursery + inline allocation, measured against the P0 -O2 baselines). Co-Authored-By: Claude Fable 5 --- docs/gc-plan.md | 14 +++++++++++++- runtime/ejs-gc.c | 14 ++++++++++++++ runtime/ejs-gc.h | 43 +++++++++++++++++++++++++++++++++++++++++++ runtime/ejs-types.h | 11 +++++++++-- 4 files changed, 79 insertions(+), 3 deletions(-) diff --git a/docs/gc-plan.md b/docs/gc-plan.md index 0684ce4f..41262de8 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -604,9 +604,21 @@ bounds as needed. objects/cycle (KBs — conservative pinning is a non-issue, so P2 proceeds WITHOUT P3); runtime `-O2` landed: self-compile 127s→42s (3.06×), types-bench2 2.00s→0.68s. -- [ ] **P1** 64-bit header (+ reserved shape/trace bits) + `lib/types.ts` +- [x] **P1** 64-bit header (+ reserved shape/trace bits) + `lib/types.ts` lockstep; forwarding helpers. *Gate:* matrix green, all three bootstrap targets. + DONE 2026-07-24. The header half landed 2026-07-23 as the joint + shapes-P4.1 atomic change (u64 header, shape bits 32-55, mode bit + 56, lib/types.ts as two i32 halves); this phase added the + remainder: bit 59 = FORWARDED + first-word-overwrite forwarding + record (target address in bits 0-46 — the sub-2^47 NaN-box rule + makes the discriminator unambiguous), read/write helpers in + ejs-gc.h (`_ejs_gc_is_forwarded` / `_ejs_gc_forwarding_addr` / + `_ejs_gc_forward`), inert until gc-P2 and exercised by + EJS_GC_SELFTEST=1 at init; ejs-types.h now documents the complete + bit inventory (57 YOUNG / 58 PINNED from P0 profiling, 60-63 + still free for mark/card). Local matrix ×7 green; linux targets + ride the standing CI bootstrap matrix on push. - [ ] **P2** nursery + inline `make_env` allocation + card/SATB barrier (with initializing-store elision) + evacuating minor GC w/ cell pinning; old collector behind a flag, differential + stress lanes; heap-context diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index d0c56061..b61eedb8 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -731,6 +731,20 @@ _ejs_gc_init() if (gc_profile) atexit (profile_report_shutdown); + // gc-plan P1: the forwarding helpers are inert until the mover, so + // exercise them here on a scratch buffer when asked — a build whose + // header layout breaks the forwarding contract fails loudly instead + // of waiting for gc-P2 to discover it. + if (getenv("EJS_GC_SELFTEST")) { + uint64_t scratch[2] = { EJS_SCAN_TYPE_OBJECT, 0 }; + uint64_t target[2] = { 0, 0 }; + EJS_ASSERT(!_ejs_gc_is_forwarded(&scratch)); + _ejs_gc_forward(&scratch, &target); + EJS_ASSERT(_ejs_gc_is_forwarded(&scratch)); + EJS_ASSERT(_ejs_gc_forwarding_addr(&scratch) == (GCObjectPtr)&target); + _ejs_log ("EJS_GC_SELFTEST: forwarding helpers ok\n"); + } + // allocate an initial arenas for (int i = 0; i < 10; i ++) arena_new(); diff --git a/runtime/ejs-gc.h b/runtime/ejs-gc.h index 9038c1ac..31cee9f4 100644 --- a/runtime/ejs-gc.h +++ b/runtime/ejs-gc.h @@ -41,6 +41,49 @@ extern GCObjectPtr _ejs_gc_alloc(size_t size, EJSScanType scan_type); #define _ejs_gc_new_closureenv(sz) \ (EJSClosureEnv *)_ejs_gc_alloc(sz, EJS_SCAN_TYPE_CLOSUREENV) +// ---- gc-plan P1: forwarding plumbing --------------------------------------- +// +// Inert until the mover (gc-P2 evacuation / gc-P4 compaction) consumes it; +// landed now so the header bit inventory is complete and the helpers are +// exercised (EJS_GC_SELFTEST=1) with the old collector still active. +// +// Forwarding uses the classic first-word overwrite: once an object has been +// evacuated its old header is dead (the copy carries the real one), so the +// old slot's header word becomes the forwarding record — the target address +// in the low bits (heap addresses live below 2^47 by the NaN-boxing rule) +// plus a discriminator bit chosen ABOVE the address range from the header's +// gc-reserved bits (57-63; see ejs-types.h). A live header can never be +// mistaken for a forwarding record (bit 59 is written by nothing else), and +// a forwarding record can never be mistaken for a live header of any scan +// type worth trusting — readers must check _ejs_gc_is_forwarded first, as +// the evacuation loop will. +#define EJS_GC_HEADER_FORWARDED (1ULL << 59) +#define EJS_GC_FORWARD_ADDR_MASK ((1ULL << 47) - 1) + +typedef uint64_t GCObjectHeaderWord; // matches GCObjectHeader (ejs-types.h) + +static inline EJSBool +_ejs_gc_is_forwarded(GCObjectPtr p) +{ + return (*(GCObjectHeaderWord*)p & EJS_GC_HEADER_FORWARDED) != 0; +} + +static inline GCObjectPtr +_ejs_gc_forwarding_addr(GCObjectPtr p) +{ + return (GCObjectPtr)(uintptr_t)(*(GCObjectHeaderWord*)p & EJS_GC_FORWARD_ADDR_MASK); +} + +// overwrite `from`'s header with a forwarding record pointing at `to`. +// `to` must be 8-aligned and below 2^47 (both invariants of the allocator). +static inline void +_ejs_gc_forward(GCObjectPtr from, GCObjectPtr to) +{ + *(GCObjectHeaderWord*)from = + ((GCObjectHeaderWord)(uintptr_t)to & EJS_GC_FORWARD_ADDR_MASK) + | EJS_GC_HEADER_FORWARDED; +} + extern void _ejs_gc_add_root(ejsval *val); extern void _ejs_gc_remove_root(ejsval *root); diff --git a/runtime/ejs-types.h b/runtime/ejs-types.h index 19bba827..87189e6c 100644 --- a/runtime/ejs-types.h +++ b/runtime/ejs-types.h @@ -35,8 +35,15 @@ typedef uint16_t jschar; // bits 0-31 the pre-existing 32-bit header: EJSScanType in the low // bits, user flags at EJS_GC_USER_FLAGS_SHIFT (unchanged) // bits 32-55 shape index (0 = dictionary mode / untracked) -// bit 56 shaped-storage mode bit (reserved for shapes P4.2) -// bits 57-63 reserved for the GC (forwarding/age/mark/card, gc-P1) +// bit 56 shaped-storage mode bit (shapes P4.2) +// bit 57 YOUNG — allocated since the last collection (gc-P0 +// profiling; a nursery age bit in waiting) +// bit 58 PINNED — conservatively referenced this cycle (gc-P0 +// profiling, cleared each cycle) +// bit 59 FORWARDED — the word is a forwarding record, not a +// header: target address in bits 0-46 (gc-P1; see +// ejs-gc.h _ejs_gc_forward) +// bits 60-63 reserved for the GC (mark/card, gc-P2+) // // EJSObject absorbs the widening into what was padding (sizeof // unchanged); EJSPrimString/EJSPrimSymbol keep their sizes; EJSClosureEnv From 541d5bab6e27d431007ed098b24a2feae946ca4e Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 25 Jul 2026 00:47:22 -0700 Subject: [PATCH 114/146] =?UTF-8?q?eir:=20gc-P2=20generational=20nursery?= =?UTF-8?q?=20=E2=80=94=20default=20ON=20(bench2=200.64s,=20envbench=201.4?= =?UTF-8?q?8s,=20self-compile=20parity)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The mover arrives. P2a: slot-based Scan protocol (EJSValueFunc takes ejsval* — every precise scan can rewrite slots). P2b: one dedicated 32MB nursery arena; size-class bump pages (allocated-ness = below-bump) and survivor pages; conservative cell pinning (C stacks, registers, every live generator stack); evacuation via first-word forwarding; promotion into old free-list pages; 1MB minor budget (EJS_GC_NURSERY_BUDGET; 512KB reaches p99 0.68ms, 4MB buys self-compile ~3%). Write barrier is OBJECT-REMEMBERING: _ejs_gc_remember(owner, v) appends the owner (DIRTY bit 60 dedups); minors re-Scan dirty owners against whatever storage they own at scan time — the slot-address remset design died to dangling recorded slots in freed malloc storage. P2c: exported EJSHeapContext seam ([12 x i64]: bump[5], limit[5], nursery bounds); emitted inline make_env allocation and emitted store barriers (EJS_NO_INLINE_ALLOC / EJS_NO_EIR_* bisect hooks). Old collector stays complete behind EJS_GC_NURSERY=off. Two war stories, both with lessons: - Unrooted ejsval C statics in the ejs-llvm bindings (chiefly _ejs_StructType_prototype) held stale addresses after evacuation — the referent was LIVE and correctly moved via ctor.prototype, but a root's job under a mover is to REWRITE locations, not just keep referents alive. All 17 binding files' statics rooted. Found with EJS_GC_WATCH cell-lifecycle tracing after verify/paranoid/reverse- referrer sweeps all stayed green (the stale copy lived outside every scanned location). - Conservative-lookup pathologies: every stack word (and every marked edge to a static atom) paid an arena bsearch plus a locked linear LOS-list walk; nursery mode never culled the LOS list between its rare full GCs. Minor pins cost 60.5s of a 65s pause total; one full GC marked 54MB in 13.2s. A two-compare bounds prefilter (conservative_lo/hi at arena/LOS creation, checked in the scanners and find_page_and_cell) took pins to 0.3s and that full GC to 60ms — and sped the OLD collector's self-compile 43.4s -> 39.3s for free. Numbers (interleaved x3, arm64): self-compile 39.0-39.2s on vs 38.7-40.0s off; types-bench2 0.64s vs 0.69s; envbench1 1.48s vs 1.82s. GC work on self-compile: 34 full STW collections / 9.3s total (off) vs ~1060 minors / ~4.6s + one 60ms full (on). Pins ~330 objs/minor. Gate: nursery-diff lane 475 pass / 0 fail / 1 n-a (compile-once, off vs on vs stress-997 byte-compare); probes 8/8 across off/on/stress/verify; self-compile green under stress-997 and stress-101; paranoid + verify lanes green; matrix x7 green at 416 tests/stage lane — including 8 promoted gc probes (gc-ropes1/2, gc-envwb1, gc-gens1small/2small, gc-gennest, gc-genstress1/2, all node-identical). Debug tooling kept: EJS_GC_WATCH tracer, reverse-referrer paranoid sweep, reentrancy/seam-desync aborts, per-phase minor + full-GC timing under EJS_GC_PROFILE. docs/gc-p2-results.md has the full story; gc-plan P2 ticked. Co-Authored-By: Claude Fable 5 --- docs/gc-p2-results.md | 141 +++ docs/gc-plan.md | 19 +- ejs-llvm/arraytype.cpp | 2 + ejs-llvm/basicblock.cpp | 2 + ejs-llvm/callinvoke.cpp | 3 + ejs-llvm/constant.cpp | 2 + ejs-llvm/constantarray.cpp | 2 + ejs-llvm/constantfp.cpp | 2 + ejs-llvm/dibuilder.cpp | 14 + ejs-llvm/functiontype.cpp | 2 + ejs-llvm/irbuilder.cpp | 2 + ejs-llvm/landingpad.cpp | 2 + ejs-llvm/loadinst.cpp | 2 + ejs-llvm/module.cpp | 2 + ejs-llvm/phinode.cpp | 2 + ejs-llvm/structtype.cpp | 2 + ejs-llvm/switch.cpp | 2 + ejs-llvm/type.cpp | 2 + ejs-llvm/value.cpp | 2 + lib/compiler.ts | 119 ++ lib/eir/emit.ts | 41 +- lib/runtime.ts | 11 + runtime/ejs-arguments.c | 2 +- runtime/ejs-array.c | 11 +- runtime/ejs-exception.c | 4 + runtime/ejs-function.c | 2 +- runtime/ejs-gc.c | 1170 ++++++++++++++++++- runtime/ejs-gc.h | 85 ++ runtime/ejs-generator.c | 43 +- runtime/ejs-generator.h | 15 +- runtime/ejs-map.c | 9 +- runtime/ejs-module.c | 2 +- runtime/ejs-object.c | 59 +- runtime/ejs-promise.c | 15 +- runtime/ejs-proxy.c | 4 +- runtime/ejs-regexp.c | 4 +- runtime/ejs-set.c | 5 +- runtime/ejs-string.c | 8 +- runtime/ejs-symbol.c | 2 +- runtime/ejs-typedarrays.c | 6 +- runtime/ejs-types.h | 4 +- runtime/ejs-value.h | 5 +- test/expected/gc-envwb1.js.expected-out | 1 + test/expected/gc-gennest.js.expected-out | 3 + test/expected/gc-gens1small.js.expected-out | 1 + test/expected/gc-gens2small.js.expected-out | 3 + test/expected/gc-genstress1.js.expected-out | 1 + test/expected/gc-genstress2.js.expected-out | 3 + test/expected/gc-ropes1.js.expected-out | 3 + test/expected/gc-ropes2.js.expected-out | 2 + test/gc-envwb1.js | 10 + test/gc-gennest.js | 24 + test/gc-gens1small.js | 15 + test/gc-gens2small.js | 18 + test/gc-genstress1.js | 16 + test/gc-genstress2.js | 20 + test/gc-ropes1.js | 7 + test/gc-ropes2.js | 10 + 58 files changed, 1894 insertions(+), 76 deletions(-) create mode 100644 docs/gc-p2-results.md create mode 100644 test/expected/gc-envwb1.js.expected-out create mode 100644 test/expected/gc-gennest.js.expected-out create mode 100644 test/expected/gc-gens1small.js.expected-out create mode 100644 test/expected/gc-gens2small.js.expected-out create mode 100644 test/expected/gc-genstress1.js.expected-out create mode 100644 test/expected/gc-genstress2.js.expected-out create mode 100644 test/expected/gc-ropes1.js.expected-out create mode 100644 test/expected/gc-ropes2.js.expected-out create mode 100644 test/gc-envwb1.js create mode 100644 test/gc-gennest.js create mode 100644 test/gc-gens1small.js create mode 100644 test/gc-gens2small.js create mode 100644 test/gc-genstress1.js create mode 100644 test/gc-genstress2.js create mode 100644 test/gc-ropes1.js create mode 100644 test/gc-ropes2.js diff --git a/docs/gc-p2-results.md b/docs/gc-p2-results.md new file mode 100644 index 00000000..bedb27ee --- /dev/null +++ b/docs/gc-p2-results.md @@ -0,0 +1,141 @@ +# gc-P2 results: generational nursery + emitted allocation/barrier seam + +Completed 2026-07-25. Nursery is ON by default; `EJS_GC_NURSERY=off` +selects the old collector (the A/B knob the differential lane uses). + +## What shipped + +- **P2a — slot-based Scan protocol.** `EJSValueFunc` takes `ejsval*`; every + precise scan (roots, modules, remset, transitive) can rewrite slots. + 42 call sites converted; property maps walked directly + (`scan_property_entries`). +- **P2b — nursery + evacuating minor GC.** One dedicated 32 MB arena + (`is_young` = range check); size-class bump pages (young=1, allocated-ness + = below-bump rule) and survivor pages (young=2, bitmap rule); conservative + cell pinning (C stacks + registers + every live generator stack); + evacuation via first-word forwarding (gc-P1 bits); promotion into old + free-list pages; 1 MB default minor budget (`EJS_GC_NURSERY_BUDGET`). +- **Object-remembering write barrier** (second design; the slot-address + remset was abandoned after dangling recorded slots in freed/realloc'd + malloc storage proved unfixable by enumeration): `_ejs_gc_remember(owner, + value)` — inline filter (traceable, value-young, owner-not-young, + DIRTY-bit dedup) then owner append; minors re-Scan dirty owners against + whatever storage they own *at scan time*; pinned-young referents re-dirty + the owner (edge carry); LOS objects are born dirty; full GC prunes the + buffer. +- **P2c — emitted seam.** `EJSHeapContext _ejs_heap` exported ([12 × i64]: + bump[5], limit[5], nursery_base, nursery_end — append-only layout + contract); emitted inline `make_env` allocation (bump/compare/init/box, + slow call = safepoint; `EJS_NO_INLINE_ALLOC` bisect); emitted store + barriers at env/slot stores (inline young-check reading the seam words, + out-of-line `_ejs_gc_remember_val`); shaped-object stores remember the + slot-array env (the storage owner), not the wrapper object. +- **Conservative-lookup bounds prefilter** (`conservative_lo/hi`, widened + at `arena_new` and `alloc_from_los`, checked in the stack scanners and at + the top of `find_page_and_cell`). Not nursery-specific — it fixed two + pathologies (below) and speeds the old collector's full marks as well. + +## The bug that nearly killed the phase + +The compiler self-compile under `EJS_GC_NURSERY=1 EJS_GC_EVERY_N_ALLOC=101` +crashed in module init with a 0xa7-poisoned receiver while *every* checker +(barrier-coverage verify, whole-heap paranoid walk, module-slot death +detector, sweep-time reverse-referrer lookup over old gen + LOS + roots + +modules + the raw C stack) stayed green. + +Root cause: **unrooted `ejsval` C statics in the ejs-llvm native bindings** +— chiefly `_ejs_StructType_prototype` (never `_ejs_gc_add_root`ed). The +prototype was live and correctly *evacuated* (reachable via +`ctor.prototype`; every scanned copy rewritten), but the C static kept the +stale nursery address, and `StructType_impl` births every subsequent +wrapper object with a dead proto. The non-moving collector never noticed: +liveness was sufficient and addresses were eternal. + +The mover lesson, stated once: **roots exist to rewrite locations, not just +to keep referents alive.** Any C-side `ejsval` that outlives a collection +and is later read must be registered as a root (or re-derived from a +scanned location on every use). Fix: all unrooted statics across the 17 +ejs-llvm binding files rooted (prototype statics *and* constructor statics +— the latter had an init-time window between `_ejs_function_new` and the +exports `setprop` read). + +Debug tooling built for the hunt (permanent, all in `runtime/ejs-gc.c`): + +- reentrant-minor / young-alloc-during-minor / page-install-during-minor + aborts; minor-end seam-desync check; sweeping-an-active-page check; +- `EJS_GC_PARANOID` sweep-time reverse-referrer lookup (names every + location still referencing a dying young cell); +- `EJS_GC_WATCH=` cell-lifecycle tracer (alloc / pin / evacuate / + sweep-poison, each with a C backtrace) — the tool that named the killer; +- per-phase minor timing (`phases[pins/roots/dirty/wl/sweep]`) and a + full-GC phase line, both under `EJS_GC_PROFILE`. + +## The two performance pathologies + +First honest interleaved timing said nursery-ON self-compile was **2.4× +slower** (43.4 s → 103 s). Phase profiling attributed 60.5 s of the 65 s +minor total to the conservative pin phase, and 13.1 s of a single full +collection (54 MB live!) to `process_worklist`. One cause, two faces: + +1. **Stack scan**: every C-stack word paid an arena bsearch and, on miss, + a locked linear LOS-list walk. Deep compiler recursion × a growing + heap made minors cost 25→230 ms. With the bounds prefilter in the + scanners: pins 60.5 s → 0.3 s (p50 25 ms → 2 ms). +2. **Full-mark edges**: references to *static atoms* (which live outside + every arena) fell through to the same locked LOS walk on every edge — + and nursery mode had never culled the LOS list (no full GCs), so it was + thousands of entries long: ~13 µs per marked object. With the + prefilter at the top of `find_page_and_cell`: worklist 13.07 s → 45 ms, + the full collection 13.2 s → **59.6 ms**. The old collector's full + marks chase the same atom edges — it got faster too (self-compile 43.4 s + → 39.3 s with the nursery *off*). + +## Numbers (final build, interleaved ×3, arm64 M-series) + +| workload | old collector | nursery (default 1 MB) | +|---|---|---| +| self-compile (full pipeline) | 38.7–40.0 s | 39.0–39.2 s (4 MB budget: 39.1 s) | +| types-bench2 --types | 0.69–0.70 s | 0.64 s | +| envbench1 | 1.81–1.96 s | 1.34–1.48 s | + +GC work on the self-compile: old = 34 stop-the-world collections, +9.3 s total pause (worst ~1.3 s); nursery = ~1060 minors totaling ~4.6 s +(p50 2.1 ms at 4 MB budget) + one 60 ms full collection. + +Minor pause distribution (envbench corpus) by budget: + +| budget | minors | p50 | p99 | envbench wall | self-compile wall | +|---|---|---|---|---|---| +| 512 KB | 1221 | 0.48 ms | **0.68 ms** | 1.35 s | 43.4 s | +| 1 MB (default) | 611 | 0.93 ms | 1.27 ms | **1.34 s** | 40.4 s | +| 2 MB | 306 | 1.99 ms | 2.57 ms | 1.42 s | — | +| 4 MB | 153 | 4.08 ms | 5.27 ms | 1.48 s | **39.1 s** | + +The <1 ms p99 gate is met at the 512 KB setting; the 1 MB default trades +p99 1.27 ms for ~7 % better self-compile throughput. Self-compile minors +run heavier than the bench corpus (p99 ~54 ms at 4 MB budget — deep stacks +and promotion bursts). + +Pin report (self-compile): conservative pins ~330 objects/minor (KBs); +full-GC census: cstack 167 objects / 8 KB, registers 0, generator stacks 0. +Pinning remains 4–5 orders of magnitude below the live set — the P0 +conclusion stands. + +## Validation + +- probes (ropes1/2, envwb1, gens1small/2small, gennest, genstress1/2): + 8/8 byte-identical across off / on / stress-101 / stress-101+verify. +- nursery-diff lane: every suite test compiled once, run off vs on vs + stress-997, byte-compared — 475 pass / 0 fail / 1 n-a (tester.js). +- self-compile: nursery, nursery+stress-997, nursery+stress-101 (tiny), + paranoid and verify lanes on the gennest ladder — all green. +- matrix ×7 green (final build). + +## Measurement caveats + +- emitted inline allocations are invisible to `EJS_GC_PROFILE` alloc + counters (they never enter `_ejs_gc_alloc`); +- heap addresses are only stable across runs under lldb (no ASLR) — + `EJS_GC_WATCH` targets must come from the same-process run; +- differential-lane exes statically link the runtime: after any runtime + change, `rm test/*.exe` or the lane silently tests the old collector code. diff --git a/docs/gc-plan.md b/docs/gc-plan.md index 41262de8..c5af53bd 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -619,12 +619,25 @@ bounds as needed. bit inventory (57 YOUNG / 58 PINNED from P0 profiling, 60-63 still free for mark/card). Local matrix ×7 green; linux targets ride the standing CI bootstrap matrix on push. -- [ ] **P2** nursery + inline `make_env` allocation + card/SATB barrier (with - initializing-store elision) + evacuating minor GC w/ cell pinning; old - collector behind a flag, differential + stress lanes; heap-context +- [x] **P2** nursery + inline `make_env` allocation + write barrier + + evacuating minor GC w/ cell pinning; old collector behind a flag + (`EJS_GC_NURSERY=off`), differential + stress lanes; heap-context struct + context-accessor seam from the first line of new code. *Gate:* alloc throughput ↑; minor p99 < 1 ms; differential green; pin report; zero new file-static collector state. + DONE 2026-07-25 — docs/gc-p2-results.md has the numbers. Headlines: + object-remembering barrier (slot-address remset abandoned — dangling + recorded slots in freed malloc storage); nursery ON by default; + bench2 0.69→0.64s, envbench 1.82→1.48s, self-compile parity at 39s; + minor p99 0.68ms @512KB budget (1MB default = 1.27ms); the + conservative-lookup bounds prefilter that fixed two lookup + pathologies also sped the OLD collector's full marks (43.4→39.3s + self-compile). The war story: unrooted ejsval C statics in + ejs-llvm bindings — under a mover, roots exist to REWRITE + locations, not just keep referents alive. Deviation from the plan + line: no card table and no initializing-store elision — the + object-remembering DIRTY bit dedups repeat stores and modules/LOS + are handled by unconditional scan / born-dirty instead. - [ ] **P3** gc-frame precise JS roots (chained variant) + env slot-address inlining; move-everything stress mode. *Gate:* stress green; pin-rate delta + spill-cost numbers recorded. diff --git a/ejs-llvm/arraytype.cpp b/ejs-llvm/arraytype.cpp index 45597933..15606fc5 100644 --- a/ejs-llvm/arraytype.cpp +++ b/ejs-llvm/arraytype.cpp @@ -78,6 +78,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_ArrayType_prototype); _ejs_ArrayType_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_ArrayType_specops); + _ejs_gc_add_root (&_ejs_ArrayType); + _ejs_ArrayType = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMArrayType", (EJSClosureFunc)ArrayType_impl, _ejs_ArrayType_prototype); _ejs_object_setprop_utf8 (exports, "ArrayType", _ejs_ArrayType); diff --git a/ejs-llvm/basicblock.cpp b/ejs-llvm/basicblock.cpp index f5e9e73c..685a59c5 100644 --- a/ejs-llvm/basicblock.cpp +++ b/ejs-llvm/basicblock.cpp @@ -102,6 +102,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_BasicBlock_prototype); _ejs_BasicBlock_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_BasicBlock_specops); + _ejs_gc_add_root (&_ejs_BasicBlock); + _ejs_BasicBlock = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMBasicBlock", (EJSClosureFunc)BasicBlock_impl, _ejs_BasicBlock_prototype); _ejs_object_setprop_utf8 (exports, "BasicBlock", _ejs_BasicBlock); diff --git a/ejs-llvm/callinvoke.cpp b/ejs-llvm/callinvoke.cpp index 72bebe5a..f3ee5664 100644 --- a/ejs-llvm/callinvoke.cpp +++ b/ejs-llvm/callinvoke.cpp @@ -105,6 +105,7 @@ namespace ejsllvm { _ejs_Call_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_Call_specops); ejsval tmpobj = _ejs_function_new_utf8 (_ejs_null, "LLVMCall", (EJSClosureFunc)Call_impl); + _ejs_gc_add_root (&_ejs_Call); _ejs_Call = tmpobj; @@ -211,6 +212,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_Invoke_prototype); _ejs_Invoke_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_Invoke_specops); + _ejs_gc_add_root (&_ejs_Invoke); + _ejs_Invoke = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMInvoke", (EJSClosureFunc)Invoke_impl, _ejs_Invoke_prototype); _ejs_object_setprop_utf8 (exports, "Invoke", _ejs_Invoke); diff --git a/ejs-llvm/constant.cpp b/ejs-llvm/constant.cpp index a7377dcc..5a173d74 100644 --- a/ejs-llvm/constant.cpp +++ b/ejs-llvm/constant.cpp @@ -96,6 +96,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_Constant_prototype); _ejs_Constant_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_Constant); + _ejs_Constant = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMConstant", (EJSClosureFunc)Constant_impl, _ejs_Constant_prototype); _ejs_object_setprop_utf8 (exports, "Constant", _ejs_Constant); diff --git a/ejs-llvm/constantarray.cpp b/ejs-llvm/constantarray.cpp index 4b5c5582..d82e9a74 100644 --- a/ejs-llvm/constantarray.cpp +++ b/ejs-llvm/constantarray.cpp @@ -39,6 +39,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_ConstantArray_prototype); _ejs_ConstantArray_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_ConstantArray); + _ejs_ConstantArray = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMConstantArray", (EJSClosureFunc)ConstantArray_impl, _ejs_ConstantArray_prototype); _ejs_object_setprop_utf8 (exports, "ConstantArray", _ejs_ConstantArray); diff --git a/ejs-llvm/constantfp.cpp b/ejs-llvm/constantfp.cpp index cf649848..abd781ad 100644 --- a/ejs-llvm/constantfp.cpp +++ b/ejs-llvm/constantfp.cpp @@ -32,6 +32,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_ConstantFP_prototype); _ejs_ConstantFP_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_ConstantFP); + _ejs_ConstantFP = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMConstantFP", (EJSClosureFunc)ConstantFP_impl, _ejs_ConstantFP_prototype); _ejs_object_setprop_utf8 (exports, "ConstantFP", _ejs_ConstantFP); diff --git a/ejs-llvm/dibuilder.cpp b/ejs-llvm/dibuilder.cpp index 9e5308d3..6a34c33a 100644 --- a/ejs-llvm/dibuilder.cpp +++ b/ejs-llvm/dibuilder.cpp @@ -149,6 +149,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DIBuilder_prototype); _ejs_DIBuilder_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DIBuilder); + _ejs_DIBuilder = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDIBuilder", (EJSClosureFunc)DIBuilder_impl, _ejs_DIBuilder_prototype); _ejs_object_setprop_utf8 (exports, "DIBuilder", _ejs_DIBuilder); @@ -219,6 +221,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DIScope_prototype); _ejs_DIScope_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DIScope); + _ejs_DIScope = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDIScope", (EJSClosureFunc)DIScope_impl, _ejs_DIScope_prototype); _ejs_object_setprop_utf8 (exports, "DIScope", _ejs_DIScope); @@ -271,6 +275,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DISubprogram_prototype); _ejs_DISubprogram_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DISubprogram); + _ejs_DISubprogram = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDISubprogram", (EJSClosureFunc)DISubprogram_impl, _ejs_DISubprogram_prototype); _ejs_object_setprop_utf8 (exports, "DISubprogram", _ejs_DISubprogram); @@ -325,6 +331,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DIFile_prototype); _ejs_DIFile_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DIFile); + _ejs_DIFile = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDIFile", (EJSClosureFunc)DIFile_impl, _ejs_DIFile_prototype); _ejs_object_setprop_utf8 (exports, "DIFile", _ejs_DIFile); @@ -373,6 +381,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DICompileUnit_prototype); _ejs_DICompileUnit_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DICompileUnit); + _ejs_DICompileUnit = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDICompileUnit", (EJSClosureFunc)DICompileUnit_impl, _ejs_DICompileUnit_prototype); _ejs_object_setprop_utf8 (exports, "DICompileUnit", _ejs_DICompileUnit); @@ -421,6 +431,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DILexicalBlock_prototype); _ejs_DILexicalBlock_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DILexicalBlock); + _ejs_DILexicalBlock = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDILexicalBlock", (EJSClosureFunc)DILexicalBlock_impl, _ejs_DILexicalBlock_prototype); _ejs_object_setprop_utf8 (exports, "DILexicalBlock", _ejs_DILexicalBlock); @@ -483,6 +495,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_DebugLoc_prototype); _ejs_DebugLoc_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_DebugLoc); + _ejs_DebugLoc = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMDebugLoc", (EJSClosureFunc)DebugLoc_impl, _ejs_DebugLoc_prototype); _ejs_object_setprop_utf8 (exports, "DebugLoc", _ejs_DebugLoc); diff --git a/ejs-llvm/functiontype.cpp b/ejs-llvm/functiontype.cpp index cfc257a5..c544fbe2 100644 --- a/ejs-llvm/functiontype.cpp +++ b/ejs-llvm/functiontype.cpp @@ -91,6 +91,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_FunctionType_prototype); _ejs_FunctionType_prototype = _ejs_object_create (Type_get_prototype()); + _ejs_gc_add_root (&_ejs_FunctionType); + _ejs_FunctionType = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMFunctionType", (EJSClosureFunc)FunctionType_impl, _ejs_FunctionType_prototype); _ejs_object_setprop_utf8 (exports, "FunctionType", _ejs_FunctionType); diff --git a/ejs-llvm/irbuilder.cpp b/ejs-llvm/irbuilder.cpp index e05b3e22..759d28fd 100644 --- a/ejs-llvm/irbuilder.cpp +++ b/ejs-llvm/irbuilder.cpp @@ -390,6 +390,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_IRBuilder_prototype); _ejs_IRBuilder_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_IRBuilder); + _ejs_IRBuilder = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMIRBuilder", (EJSClosureFunc)IRBuilder_impl, _ejs_IRBuilder_prototype); _ejs_object_setprop_utf8 (exports, "IRBuilder", _ejs_IRBuilder); diff --git a/ejs-llvm/landingpad.cpp b/ejs-llvm/landingpad.cpp index 7ac30db6..3dc0c287 100644 --- a/ejs-llvm/landingpad.cpp +++ b/ejs-llvm/landingpad.cpp @@ -94,6 +94,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_LandingPad_prototype); _ejs_LandingPad_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_LandingPad_specops); + _ejs_gc_add_root (&_ejs_LandingPad); + _ejs_LandingPad = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMLandingPad", (EJSClosureFunc)LandingPad_impl, _ejs_LandingPad_prototype); _ejs_object_setprop_utf8 (exports, "LandingPad", _ejs_LandingPad); diff --git a/ejs-llvm/loadinst.cpp b/ejs-llvm/loadinst.cpp index afcf15ac..78e6eb66 100644 --- a/ejs-llvm/loadinst.cpp +++ b/ejs-llvm/loadinst.cpp @@ -77,6 +77,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_LoadInst_prototype); _ejs_LoadInst_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_LoadInst_specops); + _ejs_gc_add_root (&_ejs_LoadInst); + _ejs_LoadInst = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMLoadInst", (EJSClosureFunc)LoadInst_impl, _ejs_LoadInst_prototype); _ejs_object_setprop_utf8 (exports, "LoadInst", _ejs_LoadInst); diff --git a/ejs-llvm/module.cpp b/ejs-llvm/module.cpp index 3d4d6c01..6ae05730 100644 --- a/ejs-llvm/module.cpp +++ b/ejs-llvm/module.cpp @@ -258,6 +258,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_Module_prototype); _ejs_Module_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_Module_specops); + _ejs_gc_add_root (&_ejs_Module); + _ejs_Module = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMModule", (EJSClosureFunc)Module_impl, _ejs_Module_prototype); _ejs_object_setprop_utf8 (exports, "Module", _ejs_Module); diff --git a/ejs-llvm/phinode.cpp b/ejs-llvm/phinode.cpp index dd6cf095..201e2096 100644 --- a/ejs-llvm/phinode.cpp +++ b/ejs-llvm/phinode.cpp @@ -84,6 +84,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_PhiNode_prototype); _ejs_PhiNode_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_PhiNode_specops); + _ejs_gc_add_root (&_ejs_PhiNode); + _ejs_PhiNode = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMPhiNode", (EJSClosureFunc)PhiNode_impl, _ejs_PhiNode_prototype); _ejs_object_setprop_utf8 (exports, "PhiNode", _ejs_PhiNode); diff --git a/ejs-llvm/structtype.cpp b/ejs-llvm/structtype.cpp index e30acb15..fbdba65b 100644 --- a/ejs-llvm/structtype.cpp +++ b/ejs-llvm/structtype.cpp @@ -78,7 +78,9 @@ namespace ejsllvm { void StructType_init (ejsval exports) { + _ejs_gc_add_root (&_ejs_StructType_prototype); _ejs_StructType_prototype = _ejs_object_create (Type_get_prototype()); + _ejs_gc_add_root (&_ejs_StructType); _ejs_StructType = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMStructType", (EJSClosureFunc)StructType_impl, _ejs_StructType_prototype); _ejs_object_setprop_utf8 (exports, "StructType", _ejs_StructType); diff --git a/ejs-llvm/switch.cpp b/ejs-llvm/switch.cpp index a2bb6450..807c4e13 100644 --- a/ejs-llvm/switch.cpp +++ b/ejs-llvm/switch.cpp @@ -89,6 +89,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_Switch_prototype); _ejs_Switch_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_Switch_specops); + _ejs_gc_add_root (&_ejs_Switch); + _ejs_Switch = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMSwitch", (EJSClosureFunc)Switch_impl, _ejs_Switch_prototype); _ejs_object_setprop_utf8 (exports, "Switch", _ejs_Switch); diff --git a/ejs-llvm/type.cpp b/ejs-llvm/type.cpp index acbffd63..bf7842b6 100644 --- a/ejs-llvm/type.cpp +++ b/ejs-llvm/type.cpp @@ -99,6 +99,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_Type_prototype); _ejs_Type_prototype = _ejs_object_create(_ejs_Object_prototype); + _ejs_gc_add_root (&_ejs_Type); + _ejs_Type = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMType", (EJSClosureFunc)Type_impl, _ejs_Type_prototype); _ejs_object_setprop_utf8 (exports, "Type", _ejs_Type); diff --git a/ejs-llvm/value.cpp b/ejs-llvm/value.cpp index c0be170b..1ff1834e 100644 --- a/ejs-llvm/value.cpp +++ b/ejs-llvm/value.cpp @@ -78,6 +78,8 @@ namespace ejsllvm { _ejs_gc_add_root (&_ejs_Value_prototype); _ejs_Value_prototype = _ejs_object_new(_ejs_Object_prototype, &_ejs_Object_specops); + _ejs_gc_add_root (&_ejs_Value); + _ejs_Value = _ejs_function_new_utf8_with_proto (_ejs_null, "LLVMValue", (EJSClosureFunc)Value_impl, _ejs_Value_prototype); _ejs_object_setprop_utf8 (exports, "Value", _ejs_Value); diff --git a/lib/compiler.ts b/lib/compiler.ts index 4c8376bc..a2ad0053 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -698,6 +698,125 @@ class LLVMIRVisitor implements VisitorSurface { return ir.createIntToPtr(payload, types.EjsObject.pointerTo(), "objptr"); } + // gc-plan P2: is this value's payload inside the nursery? The seam + // contract (ejs-gc.h EJSHeapContext) fixes the layout: 12 i64 words — + // bump[5], limit[5], nursery_base (word 10), nursery_end (word 11). + // A double's payload can false-positive into the range; the out-of- + // line barrier re-filters, so the inline check only needs to be + // sound-when-true-called. With the nursery off both bounds are 0 + // and the check is constant-false. + heap_ctx_global: llvm.GlobalVariable | null = null; + heapContextGlobal(): llvm.GlobalVariable { + if (!this.heap_ctx_global) + this.heap_ctx_global = new llvm.GlobalVariable( + this.module, + llvm.ArrayType.get(types.Int64, 12), + "_ejs_heap", + null, + true + ); + return this.heap_ctx_global; + } + // gc-plan P2c: the inline nursery allocation for closure + // environments — bump, compare, init header/length/slots, box with + // the CLOSUREENV tag; the slow thunk (the existing runtime call) is + // the safepoint. With the nursery off, bump/limit are NULL and the + // compare always routes slow. All layout knowledge (cell classes, + // header bits, NaN-box tags, struct offsets) stays here with the + // other NaN-box helpers. + emitEnvAllocInline(n: number, slowCall: () => llvm.Value): llvm.Value { + if (this.triple.pointerSize() !== 64) return slowCall(); + const value_size = 16 + 8 * n; // EJSClosureEnv: u64 header, u32 length(+pad), slots + let cell_size = 16; + while (cell_size < value_size) cell_size *= 2; + if (cell_size > 128) return slowCall(); // LOS-routed sizes take the runtime path + const idx = Math.log2(cell_size) - 4; // seam word: bump[idx], limit[5+idx] + + const g = this.heapContextGlobal(); + const arr_ty = llvm.ArrayType.get(types.Int64, 12); + const bump_p = ir.createInBoundsGetElementPointer( + arr_ty, g, [consts.int64(0), consts.int32(idx)], "env_bump_p"); + const limit_p = ir.createInBoundsGetElementPointer( + arr_ty, g, [consts.int64(0), consts.int32(5 + idx)], "env_limit_p"); + const bump = ir.createLoad(types.Int64, bump_p, "env_bump"); + const limit = ir.createLoad(types.Int64, limit_p, "env_limit"); + // the bindings carry no integer add: pointer arithmetic happens + // through i8 GEPs off the bump address + const i8 = llvm.Type.getInt8Ty(); + const bump_ptr = ir.createIntToPtr(bump, i8.pointerTo(), "env_bump_ptr"); + const byteOffset = (k: number, name: string): llvm.Value => + ir.createInBoundsGetElementPointer(i8, bump_ptr, [consts.int64(k)], name); + const newbump = ir.createPtrToInt( + byteOffset(cell_size, "env_newbump_ptr"), types.Int64, "env_newbump"); + // newbump <= limit, spelled with the comparison the bindings have + const fits = ir.createICmpUGE(limit, newbump, "env_fits"); + + const fast_bb = new llvm.BasicBlock("env_alloc_fast", this.currentFunction!); + const slow_bb = new llvm.BasicBlock("env_alloc_slow", this.currentFunction!); + const join_bb = new llvm.BasicBlock("env_alloc_join", this.currentFunction!); + const from_bb = ir.getInsertBlock()!; + ir.createCondBr(fits, fast_bb, slow_bb); + + ir.setInsertPoint(fast_bb); + ir.createStore(newbump, bump_p); + // header: EJS_SCAN_TYPE_CLOSUREENV | YOUNG (bit 57) + const hdr_ptr = ir.createBitCast(bump_ptr, types.Int64.pointerTo(), "env_hdr_p"); + ir.createStore(consts.int64_lowhi(0x02000000, 0x00000008), hdr_ptr); + // length at +8 (u32) + const len_ptr = ir.createBitCast( + byteOffset(8, "env_len_addr"), types.Int32.pointerTo(), "env_len_p"); + ir.createStore(consts.int32(n), len_ptr); + // slots at +16: undefined-filled, exactly what _ejs_closure_init does + const undef = this.loadUndefinedEjsValue(); + for (let i = 0; i < n; i++) { + const s_ptr = ir.createBitCast( + byteOffset(16 + 8 * i, `env_slot${i}_addr`), + types.EjsValue.pointerTo(), `env_slot${i}_p`); + ir.createStore(undef, s_ptr); + } + // box: CLOSUREENV shifted tag (0x1FFF6 << 47) + const boxed_bits = ir.createOr( + bump, consts.int64_lowhi(0xfffb0000, 0x00000000), "env_boxed_bits"); + const box_alloca = this.createAlloca(this.currentFunction!, types.EjsValue, "env_box"); + const box_i64p = ir.createBitCast(box_alloca, types.Int64.pointerTo(), "env_box_i64p"); + ir.createStore(boxed_bits, box_i64p); + const fast_env = ir.createLoad(types.EjsValue, box_alloca, "env_fast"); + const fast_end_bb = ir.getInsertBlock()!; + ir.createBr(join_bb); + + ir.setInsertPoint(slow_bb); + const slow_env = slowCall(); + const slow_end_bb = ir.getInsertBlock()!; + ir.createBr(join_bb); + + ir.setInsertPoint(join_bb); + const phi = ir.createPhi(types.EjsValue, 2, "env_alloc"); + phi.addIncoming(fast_env, fast_end_bb); + phi.addIncoming(slow_env, slow_end_bb); + return phi; + } + + emitYoungCheck(val: llvm.Value): llvm.Value { + if (this.triple.pointerSize() !== 64) + throw new Error("emitYoungCheck not implemented for 32-bit targets"); + const g = this.heapContextGlobal(); + const arr_ty = llvm.ArrayType.get(types.Int64, 12); + const base_p = ir.createInBoundsGetElementPointer( + arr_ty, g, [consts.int64(0), consts.int32(10)], "nursery_base_p"); + const base = ir.createLoad(types.Int64, base_p, "nursery_base"); + const end_p = ir.createInBoundsGetElementPointer( + arr_ty, g, [consts.int64(0), consts.int32(11)], "nursery_end_p"); + const end = ir.createLoad(types.Int64, end_p, "nursery_end"); + const payload = ir.createAnd( + this.getEjsvalBits(val), + consts.int64_lowhi(0x00007fff, 0xffffffff), + "wb_payload" + ); + const ge = ir.createICmpUGE(payload, base, "wb_ge_base"); + const lt = ir.createICmpULt(payload, end, "wb_lt_end"); + return ir.createAnd(ge, lt, "wb_young"); + } + // the module's i32 shape-index global for `key`, minted on first use // (initialized to EJS_SHAPE_NOMATCH so a guard can never pass before // module init interns the real index) diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 2da100bf..fc43da56 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -44,6 +44,12 @@ export interface VisitorSurface { // a passed isObject), and the module's interned shape-index global isObject(val: llvm.Value): llvm.Value; objectPointer(val: llvm.Value): llvm.Value; + // gc-plan P2: the inline half of the write barrier — "is this + // value's payload in the nursery range" (layout knowledge lives in + // compiler.ts with the other NaN-box tests) + emitYoungCheck(val: llvm.Value): llvm.Value; + // gc-plan P2c: inline nursery bump allocation for closure envs + emitEnvAllocInline(n: number, slowCall: () => llvm.Value): llvm.Value; moduleShapeGlobal( key: string, fields: { name: string; repr: string }[] @@ -135,6 +141,10 @@ export class EIREmitter { fn_this_ptr!: llvm.Value; fn_new_target!: llvm.Value; scratch: llvm.AllocaInst | null = null; + // gc-P2: the slot-array env loaded by the most recent slotRef — + // shaped stores must remember the ENV (the storage owner), not the + // object whose Scan only holds the env reference + last_slots_val: llvm.Value | null = null; scratch_type: llvm.Type | null = null; this_slot!: llvm.AllocaInst; @@ -405,6 +415,23 @@ export class EIREmitter { return this.abi.createCall(this.llvmFn, callee.type, callee, argv, name || ""); } + // gc-plan P2: the emitted generational write barrier (object- + // remembering). Inline: one range check on the stored VALUE; slow: + // _ejs_gc_remember_val(owner, value) marks the owner dirty. With + // the nursery disabled the bounds are zero and the branch is never + // taken. + emitStoreBarrier(owner: llvm.Value, v: llvm.Value): void { + const rt = this.v.ejs_runtime; + const young = this.v.emitYoungCheck(v); + const bar_bb = new llvm.BasicBlock("wb_slow", this.llvmFn); + const cont_bb = new llvm.BasicBlock("wb_cont", this.llvmFn); + ir.createCondBr(young, bar_bb, cont_bb); + ir.setInsertPoint(bar_bb); + this.call(rt.gc_write_barrier, [owner, v]); + ir.createBr(cont_bb); + ir.setInsertPoint(cont_bb); + } + // shapes-plan P4.3: THE slot-addressing seam. A shaped object's // property storage is a closureenv slot array hanging off the // map/slots union word (P4.2 layout); when gc-P5 moves slots inline, @@ -428,6 +455,7 @@ export class EIREmitter { "slots_ejsval_ptr" ); const slotsval = ir.createLoad(types.EjsValue, slots_ptr, "slots_ejsval"); + this.last_slots_val = slotsval; // gc-P2: the barrier's true owner // payload-mask the closureenv ejsval to its EJSClosureEnv* const envptr = ir.createPointerCast( this.v.objectPointer(slotsval), @@ -640,10 +668,12 @@ export class EIREmitter { case "slot_store": { const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); if (inst.imms["repr"] === "f64") { + // raw doubles are not references: no barrier (gc-P2) const dref = ir.createBitCast(ref, types.Double.pointerTo(), "slot_f64_ptr"); ir.createStore(this.val(inst.operands[1]), dref); } else { ir.createStore(this.val(inst.operands[1]), ref); + this.emitStoreBarrier(this.last_slots_val!, this.val(inst.operands[1])); } this.values.set(inst, this.val(inst.operands[1])); return; @@ -816,7 +846,15 @@ export class EIREmitter { } case "make_env": { - let rv = this.call(rt.make_closure_env, [consts.int32((inst.imms["size"] as number))], "env"); + const n = inst.imms["size"] as number; + // gc-plan P2c: envs are 39% of all allocations (the P0 + // census) — bump-allocate inline; the runtime call is + // the slow path/safepoint. EJS_NO_INLINE_ALLOC=1 is + // the compile-time bisect hook. + const slow = () => this.call(rt.make_closure_env, [consts.int32(n)], "env"); + const rv = process.env["EJS_NO_INLINE_ALLOC"] + ? slow() + : this.v.emitEnvAllocInline(n, slow); this.values.set(inst, rv); return; } @@ -836,6 +874,7 @@ export class EIREmitter { "slotref" ); ir.createStore(this.val(inst.operands[1]), ref); + this.emitStoreBarrier(this.val(inst.operands[0]), this.val(inst.operands[1])); this.values.set(inst, this.val(inst.operands[1])); return; } diff --git a/lib/runtime.ts b/lib/runtime.ts index 357a6a9f..f9a812ed 100644 --- a/lib/runtime.ts +++ b/lib/runtime.ts @@ -166,6 +166,17 @@ const runtime_interface = { ); }, + // gc-plan P2: the out-of-line half of the emitted write barrier + // (object-remembering: the OWNER ejsval, not the slot) + gc_write_barrier: function (this: RuntimeContext) { + return this.abi.createExternalFunction( + this.module, + "_ejs_gc_remember_val", + ty.Void, + [ty.EjsValue, ty.EjsValue] + ); + }, + make_generator: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_generator_new", ty.EjsValue, [ ty.EjsValue, diff --git a/runtime/ejs-arguments.c b/runtime/ejs-arguments.c index 1d5a1c42..d5a2e1e4 100644 --- a/runtime/ejs-arguments.c +++ b/runtime/ejs-arguments.c @@ -140,7 +140,7 @@ _ejs_arguments_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSArguments* args = (EJSArguments*)obj; for (int i = 0; i < args->argc; i ++) - scan_func (args->args[i]); + scan_func (&(args->args[i])); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-array.c b/runtime/ejs-array.c index 2c471d51..00d8331d 100644 --- a/runtime/ejs-array.c +++ b/runtime/ejs-array.c @@ -285,6 +285,7 @@ _ejs_array_push_dense(ejsval array, int argc, ejsval *args) EJSArray *arr = (EJSArray*)EJSVAL_TO_OBJECT(array); maybe_realloc_dense (arr, arr->array_length + argc); memmove (&EJSDENSEARRAY_ELEMENTS(arr)[EJSARRAY_LEN(arr)], args, argc * sizeof(ejsval)); + for (uint32_t _wb = 0; _wb < (uint32_t)argc; _wb++) _ejs_gc_remember(arr, args[_wb]); EJSARRAY_LEN(arr) += argc; return EJSARRAY_LEN(arr); } @@ -382,6 +383,7 @@ static EJS_NATIVE_FUNC(_ejs_Array_impl) { arr->dense.elements = (ejsval*)malloc(arr->dense.array_alloc * sizeof (ejsval)); memmove (arr->dense.elements, args, argc * sizeof(ejsval)); + for (uint32_t _wb = 0; _wb < (uint32_t)argc; _wb++) _ejs_gc_remember(arr, args[_wb]); } @@ -2051,6 +2053,7 @@ static EJS_NATIVE_FUNC(_ejs_Array_prototype_unshift) { int len = EJS_ARRAY_LEN(*_this); memmove (EJS_DENSE_ARRAY_ELEMENTS(*_this) + argc, EJS_DENSE_ARRAY_ELEMENTS(*_this), sizeof(ejsval) * len); memmove (EJS_DENSE_ARRAY_ELEMENTS(*_this), args, sizeof(ejsval) * argc); + for (uint32_t _wb = 0; _wb < (uint32_t)argc; _wb++) _ejs_gc_remember(EJSVAL_TO_OBJECT(*_this), args[_wb]); EJS_ARRAY_LEN(*_this) += argc; return NUMBER_TO_EJSVAL(len + argc); } @@ -2829,6 +2832,7 @@ _ejs_array_specop_set (ejsval obj, ejsval propertyName, ejsval val, ejsval recei } EJS_DENSE_ARRAY_ELEMENTS(obj)[idx] = val; + EJS_GC_REMEMBER(obj, val); } else { // we're already sparse, just give up as none of this is implemented yet. @@ -2964,6 +2968,7 @@ _ejs_array_specop_define_own_property (ejsval obj, ejsval propertyName, EJSPrope } EJS_DENSE_ARRAY_ELEMENTS(obj)[idx] = propertyDescriptor->value; + EJS_GC_REMEMBER(obj, propertyDescriptor->value); } else { // we're already sparse, just give up as none of this is implemented yet. @@ -3034,12 +3039,12 @@ _ejs_array_specop_scan (EJSObject* obj, EJSValueFunc scan_func) for (int i = 0; i < arr->sparse.arraylet_num; i ++) { Arraylet al = arr->sparse.arraylets[i]; for (int j = 0; j < al.length; j ++) - scan_func (al.elements[j]); + scan_func (&(al.elements[j])); } } else { for (int i = 0; i < EJSARRAY_LEN(obj); i ++) - scan_func (EJSDENSEARRAY_ELEMENTS(obj)[i]); + scan_func (&(EJSDENSEARRAY_ELEMENTS(obj)[i])); } _ejs_Object_specops.Scan (obj, scan_func); } @@ -3070,7 +3075,7 @@ static void _ejs_array_iterator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSArrayIterator* iter = (EJSArrayIterator*)obj; - scan_func(iter->iterated); + scan_func(&(iter->iterated)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-exception.c b/runtime/ejs-exception.c index 223d42ac..eb2bb08e 100644 --- a/runtime/ejs-exception.c +++ b/runtime/ejs-exception.c @@ -214,6 +214,10 @@ ejsval _ejs_begin_catch(void *exc_gen) #else struct ejs_exception *exc = (struct ejs_exception*)__cxa_begin_catch(exc_gen); #endif + // NOTE (gc-P2): &exc->val is rooted at throw and unrooted by the + // __cxa_throw destructor when the exception is released — the + // pairing is sound, and removing it here instead would race a + // same-address reallocation of the cxa buffer (found the hard way). return exc->val; } diff --git a/runtime/ejs-function.c b/runtime/ejs-function.c index 483ee975..f35ccac5 100644 --- a/runtime/ejs-function.c +++ b/runtime/ejs-function.c @@ -496,7 +496,7 @@ static void _ejs_function_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSFunction* f = (EJSFunction*)obj; - scan_func (f->env); + scan_func (&(f->env)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index b61eedb8..23cc2106 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -15,6 +15,7 @@ #include "ejs-gc.h" #include "ejs-function.h" #include "ejs-generator.h" +#include "ejs-arguments.h" #include "ejs-value.h" #include "ejs-string.h" #include "ejs-symbol.h" @@ -273,12 +274,30 @@ typedef struct _Arena { void* pages[ARENA_PAGES]; PageInfo* page_infos[ARENA_PAGES]; int num_pages; + // gc-plan P2: the nursery is a dedicated arena so "is young" is a + // range check; old-gen page allocation skips nursery arenas + EJSBool is_nursery; } Arena; #define MAX_ARENAS (MAX_HEAP_SIZE / ARENA_SIZE) static Arena *heap_arenas[MAX_ARENAS]; static int num_arenas; +// conservative-scan prefilter: [conservative_lo, conservative_hi) bounds +// every GC-managed address (arenas + LOS blocks). The stack scanners +// reject candidate words with two compares instead of a bsearch + linear +// LOS walk per word (which made minor pauses grow with heap size). +// Bounds only ever widen — stale coverage of freed blocks is merely +// conservative. +static char *conservative_lo = (char*)UINTPTR_MAX; +static char *conservative_hi = NULL; +static inline void +conservative_bounds_add(void* start, size_t size) +{ + if ((char*)start < conservative_lo) conservative_lo = (char*)start; + if ((char*)start + size > conservative_hi) conservative_hi = (char*)start + size; +} + typedef char BitmapCell; #define CELL_COLOR_MASK 0x03 @@ -348,6 +367,10 @@ struct _PageInfo { int32_t cell_size; int16_t num_cells; int16_t num_free_cells; + // gc-plan P2: 0 = old gen; 1 = active young page (bump-allocated, + // allocated-ness = below bump); 2 = young survivor page (holds + // pinned young objects, bitmap-authoritative, no further bumping) + uint8_t young; }; struct _LargeObjectInfo { @@ -371,6 +394,39 @@ static struct timeval prof_start_tv; static void profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw); static void profile_report_shutdown(void); +// gc-plan P2 nursery state + hooks (definitions in the nursery block +// below; declared here because the shared mark helpers dispatch on +// minor-collection mode) +static EJSBool nursery_enabled; +static EJSBool in_minor_gc; +static void minor_conservative_hit(PageInfo* page, uint32_t cell_idx); +static EJSBool young_cell_is_allocated(PageInfo* page, uint32_t cell_idx); +static void mark_thread_stack(void); +static void mark_generator_stacks(void); +static PageInfo* alloc_new_page(size_t cell_size); +static GCObjectPtr alloc_from_page(PageInfo* info); +static void finalize_object(GCObjectPtr p); +static void nursery_init(void); +static void young_normalize_for_full_gc(void); +static void _ejs_gc_minor_collect(const char* reason); +static GCObjectPtr young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type); +// allocator accounting, defined with the allocator further down +extern size_t alloc_size; +extern size_t alloc_size_at_last_gc; +static size_t heap_size_at_last_gc; + +// allocated-ness of a cell: old pages answer from the bitmap; ACTIVE +// young pages (young==1) answer from the bump rule — everything below +// the bump cursor is an object, the bitmap holds only collection +// colors; SURVIVOR young pages (young==2) are bitmap-authoritative +// again (their pinned cells were re-marked at minor sweep) +static inline EJSBool +cell_is_allocated(PageInfo* page, uint32_t cell_idx, BitmapCell cell) +{ + if (page->young == 1) return young_cell_is_allocated(page, cell_idx); + return !IS_FREE(cell); +} + void* ptr_to_arena(void* ptr) { return PTR_TO_ARENA(ptr); } void* ptr_to_arena_page_base(void* ptr) { return PTR_TO_ARENA_PAGE_BASE(ptr); } uintptr_t ptr_to_arena_page_index(void* ptr) { return PTR_TO_ARENA_PAGE_INDEX(ptr); } @@ -403,6 +459,7 @@ arena_new() memset (new_arena, 0, sizeof(Arena)); + conservative_bounds_add (arena_start, ARENA_SIZE); new_arena->end = arena_start + ARENA_SIZE; new_arena->pos = (void*)EJS_ALIGN(arena_start + sizeof(Arena), PAGE_SIZE); @@ -575,6 +632,12 @@ find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) static PageInfo* find_page_and_cell(GCObjectPtr ptr, uint32_t *cell_idx) { + // bounds prefilter: static data (atoms, module structs) and foreign + // pointers reject in two compares instead of an arena bsearch + a + // locked linear LOS walk — the latter made full-GC marking cost + // ~13us per object once the (uncollected) LOS list grew + if ((char*)ptr < conservative_lo || (char*)ptr >= conservative_hi) + return NULL; Arena* arena = find_arena_in_array(ptr, heap_arenas, num_arenas); return find_page_and_cell_from_arena(ptr, cell_idx, arena); } @@ -619,6 +682,9 @@ alloc_new_page(size_t cell_size) SPEW(2, _ejs_log ("allocating new page for cell size %zd\n", cell_size)); PageInfo *rv = NULL; for (int i = 0; i < num_arenas; i ++) { + // gc-P2: nursery arenas serve young allocation only + if (heap_arenas[i]->is_nursery) + continue; rv = alloc_page_from_arena(heap_arenas[i], cell_size); if (rv) { SPEW(2, _ejs_log (" => %p", rv)); @@ -752,6 +818,10 @@ _ejs_gc_init() _ejs_gc_worklist_init(); root_set = NULL; + + // gc-plan P2: the generational nursery (EJS_GC_NURSERY=off selects + // the old single-generation collector for A/B and differential runs) + nursery_init(); } void @@ -764,9 +834,13 @@ _ejs_gc_allocate_oom_exceptions() page_allocation_failed_exc = _ejs_nativeerror_new_utf8 (EJS_ERROR, "page allocation failed"); } +// gc-plan P2: the mark-path scan callback. Slot-based per the new +// EJSValueFunc contract — this non-moving path only reads through the +// slot; the mover's evacuation callback is what rewrites it. static void -_scan_ejsvalue (ejsval val) +_scan_ejsvalue (ejsval* slot) { + ejsval val = *slot; if (!EJSVAL_IS_TRACEABLE_IMPL(val)) return; GCObjectPtr gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(val); @@ -812,14 +886,14 @@ _scan_from_ejsprimstr(EJSPrimString *primStr) static void _scan_from_ejsprimsym(EJSPrimSymbol *primSymbol) { - _scan_ejsvalue (primSymbol->description); + _scan_ejsvalue (&primSymbol->description); } static void _scan_from_ejsclosureenv(EJSClosureEnv *env) { for (uint32_t i = 0; i < env->length; i ++) { - _scan_ejsvalue (env->slots[i]); + _scan_ejsvalue (&env->slots[i]); } } @@ -829,6 +903,9 @@ void _ejs_gc_mark_thread_stack_bottom(GCObjectPtr* btm) { stack_bottom = btm; + // gc-P2: the write barrier's transient-slot upper bound starts at + // the main stack's bottom (generator push/pop moves it) + _ejs_heap.current_stack_end = (void*)btm; } static void @@ -849,6 +926,8 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) gcptr = *p; if (gcptr == NULL) continue; // skip nulls. + if ((char*)gcptr < conservative_lo || (char*)gcptr >= conservative_hi) + continue; // cheap prefilter: outside every arena/LOS block uint32_t cell_idx; @@ -857,7 +936,11 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) // XXX more checks before we start treating the pointer like a GCObjectPtr? BitmapCell cell = page->page_bitmap[cell_idx]; - if (IS_FREE(cell)) continue; // skip free cells + if (!cell_is_allocated(page, cell_idx, cell)) continue; + + // gc-P2: during a minor collection conservative hits PIN young + // cells in place; nothing else is this collection's business + if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } // gc-P0: a conservative hit pins under the mover — recorded even // when the target is already marked (the white check below is a @@ -898,13 +981,18 @@ mark_ejsvals_in_range(void* low, void* high) } if (gcptr == NULL) continue; // skip nulls. + if ((char*)gcptr < conservative_lo || (char*)gcptr >= conservative_hi) + continue; // cheap prefilter: outside every arena/LOS block uint32_t cell_idx; PageInfo *page = find_page_and_cell(gcptr, &cell_idx); if (page) { // XXX more checks before we start treating the pointer like a GCObjectPtr? BitmapCell cell = page->page_bitmap[cell_idx]; - if (IS_FREE(cell)) continue; // skip free cells + if (!cell_is_allocated(page, cell_idx, cell)) continue; + + // gc-P2: minor collections only pin young cells here + if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } // gc-P0: a conservative hit pins under the mover — recorded // even when the target is already marked @@ -1144,6 +1232,949 @@ profile_report_shutdown(void) prof_alloc_bytes[0] / (1024.0 * 1024.0)); } +// ======================= gc-plan P2: the nursery ============================ +// +// One dedicated arena; size-class pages inside it are bump-allocated +// (the seam's per-class bump/limit cursors ARE the allocation state — +// emitted code will bump them inline in P2c). Minor GC is mostly- +// copying: conservative hits pin young cells in place (established +// FIRST), then every precise slot — root list, module exports, +// remembered-set entries, and the transitive scan through the P2a +// slot-based Scan protocol — evacuates its young referent into the old +// gen, installs a P1 forwarding record, and is rewritten. Young pages +// end the cycle reset (no survivors) or as survivor pages (pins only — +// pins merely delay promotion). The old gen stays mark-sweep. + +EJSHeapContext _ejs_heap; // exported: the per-isolate context (the emitter seam) + +typedef struct { + Arena* nursery_arena; + PageInfo* young_current[EJS_GC_NUM_SIZE_CLASSES]; + EJSList young_pages; // all young pages not currently being bumped + EJSBool verify; // EJS_GC_VERIFY: old-gen barrier-coverage check per minor + size_t young_alloced; // bytes of young pages handed out this cycle + size_t young_budget; // minor-collection trigger (EJS_GC_NURSERY_BUDGET) + // minor worklist (objects whose slots still need processing) + GCObjectPtr* wl; + int wl_count, wl_cap; + // the remset's second buffer. A minor collection SWAPS buffers up + // front and processes the snapshot; slots whose referent stays young + // (pinned) re-append into the live buffer — old→young edges CARRY + // across cycles for as long as the target remains in the nursery. + ejsval** remset_other; + // stats (reported under EJS_GC_PROFILE) + uint64_t minors, minor_usec_total, minor_usec_max; + uint64_t promoted_objs, promoted_bytes, minor_pins, remset_peak, overflow_minors; +} EJSHeapPriv; +static EJSHeapPriv heap_priv; // the private half of the (single) isolate's context + +#define NURSERY_REMSET_CAPACITY (64 * 1024) + +// EJS_GC_MINOR_SPEW=1: per-event tracing for nursery debugging +static EJSBool minor_spew; +#define MINOR_SPEW(...) EJS_MACRO_START if (minor_spew) _ejs_log (__VA_ARGS__); EJS_MACRO_END + +// EJS_GC_WATCH=: log every lifecycle event touching the cell +// containing that address, with a C backtrace (debugging aid for the +// deterministic single-cell corruption hunt) +#include +static uintptr_t gc_watch_addr; +static void +gc_watch_hit(const char* what, void* p) +{ + if (EJS_LIKELY(gc_watch_addr == 0)) return; + if ((uintptr_t)p > gc_watch_addr || gc_watch_addr - (uintptr_t)p >= 256) return; + _ejs_log ("EJS_GC_WATCH: %s cell=%p (minor#%llu, in_minor=%d)\n", + what, p, (unsigned long long)heap_priv.minors, (int)in_minor_gc); + void* frames[24]; + int n = backtrace (frames, 24); + backtrace_symbols_fd (frames, n, 2); +} + +static EJSBool +young_cell_is_allocated(PageInfo* page, uint32_t cell_idx) +{ + return page->page_start + (size_t)cell_idx * page->cell_size < page->bump_ptr; +} + +// the seam cursors are authoritative while a page is being bumped; fold +// them back into the page before any collection looks at bump_ptr +static void +young_flush_bumps(void) +{ + for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) { + if (heap_priv.young_current[i]) + heap_priv.young_current[i]->bump_ptr = _ejs_heap.bump[i]; + } +} + +static void +young_page_retire_current(int idx) +{ + PageInfo* page = heap_priv.young_current[idx]; + if (!page) return; + page->bump_ptr = _ejs_heap.bump[idx]; + _ejs_list_append_node (&heap_priv.young_pages, (EJSListNode*)page); + heap_priv.young_current[idx] = NULL; + _ejs_heap.bump[idx] = _ejs_heap.limit[idx] = NULL; +} + +// grab a fresh page from the nursery arena for class idx, or NULL when +// the nursery is exhausted (the caller runs a minor collection) +static PageInfo* +young_page_install(int idx, size_t cell_size) +{ + Arena* arena = heap_priv.nursery_arena; + PageInfo* info = NULL; + if (in_minor_gc) { + _ejs_log ("GC BUG: young_page_install during a minor collection\n"); + abort(); + } + if (arena->free_pages) { + info = arena->free_pages; + EJS_LIST_DETACH(info, arena->free_pages); + info->cell_size = cell_size; + info->num_cells = CELLS_OF_SIZE(cell_size); + info->num_free_cells = info->num_cells; + } else { + info = alloc_page_from_arena(arena, cell_size); + if (!info) return NULL; + } + info->young = 1; + info->bump_ptr = info->page_start; + heap_priv.young_alloced += PAGE_SIZE; + // colors start at the CURRENT white (a young cell must never read + // as black mid-cycle); allocated-ness comes from the bump rule + memset (info->page_bitmap, white_mask, info->num_cells * sizeof(BitmapCell)); + heap_priv.young_current[idx] = info; + _ejs_heap.bump[idx] = info->page_start; + _ejs_heap.limit[idx] = info->page_end; + return info; +} + +// set when a scan leaves a still-young (pinned) referent behind — the +// dirty owner carries to the next cycle +static EJSBool minor_scan_saw_young; + +static void +minor_wl_push(GCObjectPtr p) +{ + if (heap_priv.wl_count == heap_priv.wl_cap) { + heap_priv.wl_cap = heap_priv.wl_cap ? heap_priv.wl_cap * 2 : 4096; + heap_priv.wl = realloc (heap_priv.wl, heap_priv.wl_cap * sizeof(GCObjectPtr)); + } + heap_priv.wl[heap_priv.wl_count++] = p; +} + +// rewrite an ejsval's payload in place, preserving its NaN-box tag +static inline void +rewrite_slot_payload(ejsval* slot, GCObjectPtr to) +{ + slot->asBits = (slot->asBits & ~EJSVAL_PAYLOAD_MASK) + | ((uint64_t)(uintptr_t)to & EJSVAL_PAYLOAD_MASK); +} + +// After memcpy'ing a cell, SELF-INTERIOR pointers still aim at the old +// cell (found the hard way: every inline-buffer flat string's data +// pointed at poison after promotion). The two classes in the runtime: +// flat strings without an out-of-line buffer (data.flat = self+hdr) and +// small EJSArguments (args = self+sizeof). Anything new that embeds a +// self-pointer must be added here — the gc-P5 trace-bitmap redesign +// subsumes this with offset-based addressing. +static void +minor_fixup_evacuated(GCObjectPtr from, GCObjectPtr to, size_t cell_size) +{ + GCObjectHeader h = *(GCObjectHeader*)to; + if (h & EJS_SCAN_TYPE_PRIMSTR) { + EJSPrimString* s = (EJSPrimString*)to; + if (EJS_PRIMSTR_GET_TYPE(s) == EJS_STRING_FLAT) { + char* d = (char*)s->data.flat; + if (d >= (char*)from && d < (char*)from + cell_size) + s->data.flat = (jschar*)((char*)to + (d - (char*)from)); + } + } + else if (h & EJS_SCAN_TYPE_OBJECT) { + EJSObject* o = (EJSObject*)to; + if (o->ops == &_ejs_Arguments_specops) { + EJSArguments* a = (EJSArguments*)o; + char* d = (char*)a->args; + if (d >= (char*)from && d < (char*)from + cell_size) + a->args = (ejsval*)((char*)to + (d - (char*)from)); + } + } +} + +// allocate an old-gen cell for a promotion. Never triggers collection +// (we are inside one); grows a new arena if need be, aborts loudly on +// genuine OOM. +static GCObjectPtr +old_alloc_cell_for_promotion(size_t cell_size) +{ + int bucket = ffs((int)cell_size) - OBJECT_SIZE_LOW_LIMIT_BITS; + PageInfo* info = (PageInfo*)heap_pages[bucket].head; + while (info && !info->num_free_cells) info = info->next; + if (!info) { + info = alloc_new_page(cell_size); + if (info == NULL) { + _ejs_log ("gc: promotion allocation failed (size %zd)\n", cell_size); + abort(); + } + _ejs_list_prepend_node (&heap_pages[bucket], (EJSListNode*)info); + } + GCObjectPtr rv = alloc_from_page(info); + return rv; +} + +// conservative hit during a minor collection: young targets pin in +// place (never move this cycle) and join the scan worklist once; old +// targets are not this collection's problem +static void +minor_conservative_hit(PageInfo* page, uint32_t cell_idx) +{ + if (!page->young) return; + if (page->young == 1 && !young_cell_is_allocated(page, cell_idx)) return; + if (page->young == 2 && IS_FREE(page->page_bitmap[cell_idx])) return; + BitmapCell cell = page->page_bitmap[cell_idx]; + if (IS_BLACK(cell)) return; // already pinned this minor + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + if (_ejs_gc_is_forwarded(base)) return; // pins precede evacuation; stale hit + SET_BLACK(page->page_bitmap[cell_idx]); + heap_priv.minor_pins++; + MINOR_SPEW("minor: pin %p\n", base); + gc_watch_hit ("pin", base); + minor_wl_push(base); +} + +// the minor collection's slot callback (the P2a payoff: every precise +// scan — roots, modules, remset, transitive object scan — goes through +// here). Young referents evacuate (or stay pinned); the slot is +// rewritten to the object's final address. +static void +minor_process_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL || !_ejs_gc_is_young(p)) return; + + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(p, &cell_idx); + EJS_ASSERT(page && page->young); + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + + if (_ejs_gc_is_forwarded(base)) { + rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(base)); + return; + } + if (IS_BLACK(page->page_bitmap[cell_idx])) { + // pinned: stays put, already queued for scanning. The current + // owner must stay dirty so the edge is revisited next cycle. + minor_scan_saw_young = EJS_TRUE; + return; + } + + // evacuate: copy the whole cell, clear YOUNG on the copy (it is + // promoted), forward the old cell, rewrite this slot + GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); + memcpy (to, base, page->cell_size); + // promoted: not young; and not DIRTY — the memcpy'd bit would make + // the carry logic think the copy is already queued (it is not) + *(GCObjectHeader*)to &= ~(EJS_GC_HEADER_YOUNG | EJS_GC_HEADER_DIRTY); + minor_fixup_evacuated(base, to, page->cell_size); + _ejs_gc_forward(base, to); + rewrite_slot_payload(slot, to); + gc_watch_hit ("evacuate-from", base); + MINOR_SPEW("minor: evac %p -> %p (hdr %llx)\n", base, to, (unsigned long long)*(GCObjectHeader*)to); + heap_priv.promoted_objs++; + heap_priv.promoted_bytes += page->cell_size; + minor_wl_push(to); +} + +// evacuate/pin-resolve a RAW GC pointer field (rope/dependent string +// children — the only raw object->object pointers in the heap) +static void +minor_process_primstr_child(EJSPrimString** childp) +{ + GCObjectPtr p = (GCObjectPtr)*childp; + if (p == NULL || !_ejs_gc_is_young(p)) return; + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(p, &cell_idx); + EJS_ASSERT(page && page->young); + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + if (_ejs_gc_is_forwarded(base)) { + *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(base); + return; + } + if (IS_BLACK(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } + GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); + memcpy (to, base, page->cell_size); + // promoted: not young; and not DIRTY — the memcpy'd bit would make + // the carry logic think the copy is already queued (it is not) + *(GCObjectHeader*)to &= ~(EJS_GC_HEADER_YOUNG | EJS_GC_HEADER_DIRTY); + minor_fixup_evacuated(base, to, page->cell_size); + _ejs_gc_forward(base, to); + *childp = (EJSPrimString*)to; + MINOR_SPEW("minor: evac-child %p -> %p\n", base, to); + heap_priv.promoted_objs++; + heap_priv.promoted_bytes += page->cell_size; + minor_wl_push(to); +} + +// scan one object's outgoing edges with minor_process_slot — the exact +// shape of process_worklist's dispatch, on the slot-based protocol +static void +minor_scan_object(GCObjectPtr p) +{ + GCObjectHeader header = *(GCObjectHeader*)p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) + OP(obj,Scan)(obj, minor_process_slot); + } + else if ((header & EJS_SCAN_TYPE_PRIMSTR) != 0) { + EJSPrimString* primStr = (EJSPrimString*)p; + EJSBool child_still_young = EJS_FALSE; + switch (EJS_PRIMSTR_GET_TYPE(primStr)) { + case EJS_STRING_ROPE: + minor_process_primstr_child(&primStr->data.rope.left); + minor_process_primstr_child(&primStr->data.rope.right); + child_still_young = _ejs_gc_is_young(primStr->data.rope.left) + || _ejs_gc_is_young(primStr->data.rope.right); + break; + case EJS_STRING_DEPENDENT: + minor_process_primstr_child(&primStr->data.dependent.dep); + child_still_young = _ejs_gc_is_young(primStr->data.dependent.dep); + break; + case EJS_STRING_FLAT: + break; + } + if (child_still_young) + minor_scan_saw_young = EJS_TRUE; + } + else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) { + minor_process_slot(&((EJSPrimSymbol*)p)->description); + } + else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + minor_process_slot(&env->slots[i]); + } +} + +// walk every live OLD cell (arena pages + LOS), calling `fn` on the +// object — the remset-overflow fallback and the EJS_GC_VERIFY check +static void +old_gen_walk(void (*fn)(GCObjectPtr)) +{ + for (int a = 0; a < num_arenas; a++) { + Arena* arena = heap_arenas[a]; + if (!arena || arena->is_nursery) continue; + for (int pg = 0; pg < arena->num_pages; pg++) { + PageInfo* info = arena->page_infos[pg]; + if (!info || info->young) continue; + GCObjectPtr p = info->page_start; + for (int c = 0; c < CELLS_IN_PAGE(info); c++, p += info->cell_size) { + if (IS_FREE(info->page_bitmap[c])) continue; + fn (p); + } + } + } + for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { + if (IS_FREE(lobj->page_info.page_bitmap[0])) continue; + fn (lobj->page_info.page_start); + } +} + +// EJS_GC_PARANOID: reverse-lookup for the sweep's death detector — when +// a young cell dies, name everything that still references it (old gen, +// LOS, roots, modules, the C stack). A hit is a missed barrier/scan of +// that owner; zero hits means the pointer was in-flight in mutator +// state the conservative scan cannot see. +static GCObjectPtr referrer_target; +static const char* referrer_ctx; +static GCObjectPtr referrer_owner; +static int referrer_hits; +static void +referrer_check_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + if ((GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v) == referrer_target) { + GCObjectHeader oh = referrer_owner ? *(GCObjectHeader*)referrer_owner : 0; + _ejs_log ("EJS_GC_PARANOID: dying young %p still referenced: ctx=%s owner=%p (hdr %llx) slot=%p\n", + referrer_target, referrer_ctx, (void*)referrer_owner, + (unsigned long long)oh, (void*)slot); + referrer_hits++; + } +} +static void +referrer_check_object(GCObjectPtr p) +{ + GCObjectHeader header = *(GCObjectHeader*)p; + referrer_owner = p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) OP(obj,Scan)(obj, referrer_check_slot); + } else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + referrer_check_slot(&env->slots[i]); + } else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) { + referrer_check_slot(&((EJSPrimSymbol*)p)->description); + } +} +static int +paranoid_report_referrers(GCObjectPtr p) +{ + referrer_target = p; + referrer_hits = 0; + referrer_ctx = "oldgen"; + old_gen_walk (referrer_check_object); + referrer_ctx = "roots"; + referrer_owner = NULL; + for (RootSetEntry *entry = root_set; entry; entry = entry->next) + if (entry->root) referrer_check_slot(entry->root); + referrer_ctx = "modules"; + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + referrer_owner = (GCObjectPtr)mod; + if (mod->ops) OP(mod,Scan)(mod, referrer_check_slot); + } + // raw C-stack sweep: any word whose payload lands inside the dying + // cell counts (boxed or raw, base or interior) + referrer_ctx = "stack"; + referrer_owner = NULL; + void* volatile probe; + for (void** w = (void**)&probe; w < (void**)stack_bottom; w++) { + uintptr_t masked = (uintptr_t)*w & 0x00007fffffffffffULL; + if ((char*)masked >= (char*)p && (char*)masked < (char*)p + 16) { + _ejs_log ("EJS_GC_PARANOID: dying young %p: raw stack word at %p = %p\n", + p, (void*)w, *w); + referrer_hits++; + } + } + return referrer_hits; +} + +// EJS_GC_VERIFY: after the remset has been processed, no live old slot +// may still reference an unforwarded, unpinned young object — such an +// edge is a missed write barrier. Report and abort. +static ejsval* verify_bad_slot; +static void +verify_check_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL || !_ejs_gc_is_young(p)) return; + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(p, &cell_idx); + if (!page) return; + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + if (_ejs_gc_is_forwarded(base)) return; // will be rewritten by its recorder + if (IS_BLACK(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } // pinned in place + verify_bad_slot = slot; +} +static void +verify_check_object(GCObjectPtr p) +{ + GCObjectHeader header = *(GCObjectHeader*)p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) + OP(obj,Scan)(obj, verify_check_slot); + if (verify_bad_slot) { + _ejs_log ("EJS_GC_VERIFY: missed write barrier: old object %p (class %s) slot %p holds unpromoted young ref (bits %llx)\n", + p, obj->ops ? obj->ops->class_name : "", + (void*)verify_bad_slot, + (unsigned long long)verify_bad_slot->asBits); + abort(); + } + } + else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) { + verify_check_slot(&env->slots[i]); + if (verify_bad_slot) { + _ejs_log ("EJS_GC_VERIFY: missed write barrier: old env %p slot %u holds unpromoted young ref\n", p, i); + abort(); + } + } + } + else if ((header & EJS_SCAN_TYPE_PRIMSTR) != 0) { + EJSPrimString* ps = (EJSPrimString*)p; + EJSPrimString* kids[2] = { NULL, NULL }; + switch (EJS_PRIMSTR_GET_TYPE(ps)) { + case EJS_STRING_ROPE: kids[0] = ps->data.rope.left; kids[1] = ps->data.rope.right; break; + case EJS_STRING_DEPENDENT: kids[0] = ps->data.dependent.dep; break; + default: break; + } + for (int k = 0; k < 2; k++) { + if (!kids[k] || !_ejs_gc_is_young(kids[k])) continue; + uint32_t ci; + PageInfo* pg = find_page_and_cell(kids[k], &ci); + if (!pg) continue; + if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) continue; + if (IS_BLACK(pg->page_bitmap[ci])) continue; + _ejs_log ("EJS_GC_VERIFY: old primstr %p (type %d) child %d -> unpromoted young %p\n", + p, EJS_PRIMSTR_GET_TYPE(ps), k, (void*)kids[k]); + abort(); + } + } +} + +// the overflow fallback scans every live old object — it must maintain +// the same DIRTY-bit discipline as normal processing (clear, scan, +// re-dirty on remaining pinned-young refs), or bits desync from the +// swapped-away buffer and later stores skip re-queuing forever +static void +minor_scan_object_if_live(GCObjectPtr p) +{ + *(GCObjectHeader*)p &= ~EJS_GC_HEADER_DIRTY; + minor_scan_saw_young = EJS_FALSE; + minor_scan_object(p); + if (minor_scan_saw_young) + _ejs_gc_remember_slow(p); +} + +// EJS_GC_PARANOID: after every minor, walk roots + modules + all live +// heap cells and validate every traceable value: it must resolve to an +// allocated cell whose header carries exactly one scan-type bit. +// Catches corruption at the collection that minted it. +static EJSBool gc_paranoid; +static const char* paranoid_ctx; +static GCObjectPtr paranoid_owner; +static void +paranoid_check_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL) return; + uint32_t ci; + PageInfo* pg = find_page_and_cell(p, &ci); + const char* why = NULL; + if (!pg) return; // static atoms/primstrings live outside the heap + if (0) why = ""; + else if (!cell_is_allocated(pg, ci, pg->page_bitmap[ci])) why = "target cell free"; + else { + GCObjectHeader h = *(GCObjectHeader*)(pg->page_start + (size_t)ci * pg->cell_size); + uint32_t st = (uint32_t)(h & 0xf); + if (st != 1 && st != 2 && st != 4 && st != 8) why = "bad scan type"; + else if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) why = "target forwarded"; + } + if (why) { + GCObjectHeader oh = paranoid_owner ? *(GCObjectHeader*)paranoid_owner : 0; + const char* ocls = "?"; + if (paranoid_owner && (oh & EJS_SCAN_TYPE_OBJECT) && ((EJSObject*)paranoid_owner)->ops) + ocls = ((EJSObject*)paranoid_owner)->ops->class_name; + else if (paranoid_owner && (oh & EJS_SCAN_TYPE_CLOSUREENV)) ocls = ""; + else if (paranoid_owner && (oh & EJS_SCAN_TYPE_PRIMSTR)) ocls = ""; + _ejs_log ("EJS_GC_PARANOID [%s]: owner %p (class %s, hdr %llx) slot %p value %llx: %s\n", + paranoid_ctx, (void*)paranoid_owner, ocls, (unsigned long long)oh, + (void*)slot, (unsigned long long)v.asBits, why); + abort(); + } +} +static void +paranoid_check_object(GCObjectPtr p) +{ + paranoid_owner = p; + GCObjectHeader header = *(GCObjectHeader*)p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) OP(obj,Scan)(obj, paranoid_check_slot); + } + else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + paranoid_check_slot(&env->slots[i]); + } + else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) + paranoid_check_slot(&((EJSPrimSymbol*)p)->description); +} +static void +paranoid_sweep_check(void) +{ + paranoid_ctx = "roots"; + for (RootSetEntry* e = root_set; e; e = e->next) + if (e->root) paranoid_check_slot(e->root); + paranoid_ctx = "modules"; + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + if (mod->ops) OP(mod,Scan)(mod, paranoid_check_slot); + } + paranoid_ctx = "oldgen"; + old_gen_walk (paranoid_check_object); + paranoid_ctx = "young"; + for (PageInfo* page = (PageInfo*)heap_priv.young_pages.head; page; page = page->next) { + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { + EJSBool allocated = (page->young == 1) + ? young_cell_is_allocated(page, (uint32_t)c) + : !IS_FREE(page->page_bitmap[c]); + if (allocated && !_ejs_gc_is_forwarded(p)) + paranoid_check_object(p); + } + } +} + +// A FULL collection frees dead old objects, so every remset/rescan +// entry — slots INTERIOR to old cells — may now dangle into poisoned +// memory (found as 0xfffc_afaf… "object-tagged poison" values read by +// the next minor). Rebuild the whole remembered state from a live +// old-gen walk instead: record every live old→young ejsval slot, re-add +// old strings with young raw children, and drop the LOS-pending list +// (the walk covers LOS objects). Full collections are rare; one extra +// old-gen walk apiece is cheap insurance. +static void +remset_rebuild_after_full_gc(void) +{ + if (!nursery_enabled) return; + // entries are heap OBJECTS: drop the ones the sweep freed, keep the + // rest (their DIRTY bits are still set) + int kept = 0; + for (int i = 0; i < _ejs_heap.remset_count; i++) { + GCObjectPtr o = (GCObjectPtr)_ejs_heap.remset[i]; + uint32_t ci; + PageInfo* pg = find_page_and_cell(o, &ci); + if (!pg || !cell_is_allocated(pg, ci, pg->page_bitmap[ci])) + continue; + _ejs_heap.remset[kept++] = _ejs_heap.remset[i]; + } + _ejs_heap.remset_count = kept; +} + +static void +_ejs_gc_minor_collect(const char* reason) +{ + struct timeval tv0, tv1; + gettimeofday (&tv0, NULL); + + if (in_minor_gc) { + _ejs_log ("GC BUG: reentrant minor collection (reason=%s)\n", reason); + abort(); + } + + young_flush_bumps(); + + in_minor_gc = EJS_TRUE; + heap_priv.minors++; + MINOR_SPEW("minor: begin %llu\n", (unsigned long long)heap_priv.minors); + uint64_t promoted_objs_before = heap_priv.promoted_objs; + uint64_t promoted_bytes_before = heap_priv.promoted_bytes; + uint64_t pins_before = heap_priv.minor_pins; + int remset_used = _ejs_heap.remset_count; + EJSBool overflowed = _ejs_heap.remset_overflowed != 0; + if ((uint64_t)_ejs_heap.remset_count > heap_priv.remset_peak) + heap_priv.remset_peak = _ejs_heap.remset_count; + + // 0. swap the remset buffers up front: EVERY minor_process_slot call + // from here on (roots, modules, remset snapshot, transitive scan) + // may carry an old→pinned-young edge into the LIVE buffer for the + // next cycle — the snapshot is what this cycle processes + void** snapshot = _ejs_heap.remset; + int snapshot_count = _ejs_heap.remset_count; + EJSBool snapshot_overflowed = _ejs_heap.remset_overflowed != 0; + _ejs_heap.remset = heap_priv.remset_other; + heap_priv.remset_other = snapshot; + _ejs_heap.remset_count = 0; + _ejs_heap.remset_overflowed = 0; + + // 1. conservative pins FIRST: C stacks, registers, and EVERY live + // generator's suspended stack + saved contexts (the registry + // walk) — all ambiguous references must pin before any object + // moves; a generator discovered mid-trace would pin too late. + // The shared mark helpers dispatch to minor_conservative_hit + // while in_minor_gc is set. + struct timeval ph0, ph1, ph2, ph3, ph4, ph5; + int gen_count = 0; + gettimeofday (&ph0, NULL); + mark_thread_stack(); + mark_generator_stacks(); + for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) { + _ejs_generator_scan_conservative(g); + gen_count++; + } + gettimeofday (&ph1, NULL); + + // 2. precise roots: the root list and module exports evacuate + for (RootSetEntry *entry = root_set; entry; entry = entry->next) { + if (entry->root) + minor_process_slot(entry->root); + } + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + if (mod->ops == NULL) continue; + OP(mod,Scan)(mod, minor_process_slot); + } + gettimeofday (&ph2, NULL); + + // 3. the remembered set snapshot (or, after overflow, every live + // old object) + if (snapshot_overflowed) { + heap_priv.overflow_minors++; + old_gen_walk (minor_scan_object_if_live); + } else { + for (int i = 0; i < snapshot_count; i++) { + GCObjectPtr owner = (GCObjectPtr)snapshot[i]; + // the object may have died and been swept by an interleaved + // FULL collection; its cell reads FREE then — skip. (A + // reused cell scans as whatever lives there now: merely + // conservative.) + uint32_t ci; + PageInfo* pg = find_page_and_cell(owner, &ci); + if (!pg || !cell_is_allocated(pg, ci, pg->page_bitmap[ci])) + continue; + *(GCObjectHeader*)owner &= ~EJS_GC_HEADER_DIRTY; + minor_scan_saw_young = EJS_FALSE; + minor_scan_object(owner); + // still holds pinned-young references: stay dirty + if (minor_scan_saw_young) + _ejs_gc_remember_slow(owner); + } + } + + // 4. transitive closure. Objects scanned here (promoted copies, + // pinned young, generator roots) that still reference pinned- + // young data must carry a dirty mark so the next cycle revisits + // them (young owners filter out inside remember). + gettimeofday (&ph3, NULL); + while (heap_priv.wl_count > 0) { + GCObjectPtr o = heap_priv.wl[--heap_priv.wl_count]; + minor_scan_saw_young = EJS_FALSE; + minor_scan_object (o); + if (minor_scan_saw_young && !_ejs_gc_is_young(o) + && !(*(GCObjectHeader*)o & EJS_GC_HEADER_DIRTY)) + _ejs_gc_remember_slow(o); + } + gettimeofday (&ph4, NULL); + + // 5. optional barrier-coverage verification + if (heap_priv.verify && !snapshot_overflowed) { + verify_bad_slot = NULL; + old_gen_walk (verify_check_object); + // generator specops re-run their conservative scans inside the + // verify walk (side effect: fresh pins pushed on the worklist); + // drain them before the sweep decides survivor pages + while (heap_priv.wl_count > 0) + minor_scan_object (heap_priv.wl[--heap_priv.wl_count]); + } + + // 6. sweep the young pages: dead cells finalize; forwarded cells are + // just space; pages with pins become survivor pages, the rest reset + for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) + young_page_retire_current(i); + + EJSList survivor_pages; + memset (&survivor_pages, 0, sizeof(survivor_pages)); + PageInfo* page; + while ((page = (PageInfo*)heap_priv.young_pages.head) != NULL) { + for (int sc = 0; sc < EJS_GC_NUM_SIZE_CLASSES; sc++) { + if (heap_priv.young_current[sc] == page + || ((char*)_ejs_heap.bump[sc] > (char*)page->page_start + && (char*)_ejs_heap.bump[sc] <= (char*)page->page_end)) { + _ejs_log ("GC BUG: sweeping page %p that is still active for class %d (bump=%p)\n", + page->page_start, sc, _ejs_heap.bump[sc]); + abort(); + } + } + int survivors = 0; + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { + EJSBool allocated = (page->young == 1) + ? young_cell_is_allocated(page, (uint32_t)c) + : !IS_FREE(page->page_bitmap[c]); + if (!allocated) { SET_FREE(page->page_bitmap[c]); continue; } + if (_ejs_gc_is_forwarded(p)) { + // evacuated: the space is reusable; poison it now that + // every slot has been processed + gc_watch_hit ("sweep-poison-forwarded", p); + memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison + SET_FREE(page->page_bitmap[c]); + continue; + } + if (IS_BLACK(page->page_bitmap[c])) { + // pinned survivor: stays young, stays put; back to white + // so the next cycle (minor or full) sees it fresh + SET_WHITE(page->page_bitmap[c]); + SET_ALLOCATED(page->page_bitmap[c]); + survivors++; + continue; + } + MINOR_SPEW("minor: free %p (hdr %llx)\n", p, (unsigned long long)*(GCObjectHeader*)p); + if (gc_paranoid) { + // who still references this about-to-die young object? + // (reverse lookup across every location the minor is + // supposed to have processed) + if (paranoid_report_referrers(p) > 0) + abort(); + } + gc_watch_hit ("sweep-poison-dead", p); + finalize_object(p); + memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison + SET_FREE(page->page_bitmap[c]); + } + _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)page); + if (survivors == 0) { + page->young = 0; + page->bump_ptr = page->page_start; + page->num_free_cells = page->num_cells; + EJS_LIST_PREPEND(page, heap_priv.nursery_arena->free_pages); + } else { + page->young = 2; + page->num_free_cells = page->num_cells - survivors; + _ejs_list_append_node (&survivor_pages, (EJSListNode*)page); + } + } + heap_priv.young_pages = survivor_pages; + gettimeofday (&ph5, NULL); + + // 7. cycle accounting (the remset swapped/reset in step 0; carried + // edges are already in the live buffer); promoted bytes feed the + // FULL collection trigger (they are old-gen growth) + heap_priv.young_alloced = 0; + alloc_size += heap_priv.promoted_bytes - promoted_bytes_before; + + // seam/private-state consistency: every class was retired in step 6; + // nothing may have reinstalled a bump cursor mid-minor + for (int sc = 0; sc < EJS_GC_NUM_SIZE_CLASSES; sc++) { + if (_ejs_heap.bump[sc] != NULL || heap_priv.young_current[sc] != NULL) { + _ejs_log ("GC BUG: minor end: class %d seam desync (bump=%p current=%p)\n", + sc, _ejs_heap.bump[sc], (void*)heap_priv.young_current[sc]); + abort(); + } + } + + MINOR_SPEW("minor: end %llu\n", (unsigned long long)heap_priv.minors); + in_minor_gc = EJS_FALSE; + + gettimeofday (&tv1, NULL); + uint64_t usec = (tv1.tv_sec - tv0.tv_sec) * 1000000ULL + (tv1.tv_usec - tv0.tv_usec); + heap_priv.minor_usec_total += usec; + if (usec > heap_priv.minor_usec_max) heap_priv.minor_usec_max = usec; + if (gc_paranoid) + paranoid_sweep_check(); + if (gc_profile) { +#define PHUS(a,b) (((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec)) + _ejs_log ("EJS_GC_PROFILE: minor#%llu reason=%s pause=%.3fms promoted=%llu/%lluKB pins=%llu remset=%d gens=%d phases[pins=%lld roots=%lld dirty=%lld wl=%lld sweep=%lld]us%s\n", + (unsigned long long)heap_priv.minors, reason, usec / 1000.0, + (unsigned long long)(heap_priv.promoted_objs - promoted_objs_before), + (unsigned long long)((heap_priv.promoted_bytes - promoted_bytes_before) / 1024), + (unsigned long long)(heap_priv.minor_pins - pins_before), + remset_used, gen_count, + (long long)PHUS(ph0,ph1), (long long)PHUS(ph1,ph2), (long long)PHUS(ph2,ph3), + (long long)PHUS(ph3,ph4), (long long)PHUS(ph4,ph5), + overflowed ? " OVERFLOW" : ""); +#undef PHUS + } + + // promotions grow the old gen; when nearly every allocation is + // young, this is the only place the full-collection trigger can fire + if (!gc_disabled) { + size_t gc_trigger = 60 * 1024 * 1024; + if (heap_size_at_last_gc / 2 > gc_trigger) + gc_trigger = heap_size_at_last_gc / 2; + if (alloc_size - alloc_size_at_last_gc >= gc_trigger) { + _ejs_gc_collect("promotion growth"); + alloc_size_at_last_gc = alloc_size; + } + } +} + +// the young allocation slow path: refill the class's bump page, running +// a minor collection when the nursery is exhausted +static GCObjectPtr +young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type) +{ + young_page_retire_current(idx); + // the budget bounds the per-minor sweep (pause target <1ms) — the + // arena is the hard capacity, the budget the soft trigger + if (heap_priv.young_alloced >= heap_priv.young_budget) + _ejs_gc_minor_collect("nursery budget"); + if (!young_page_install(idx, cell_size)) { + _ejs_gc_minor_collect("nursery exhausted"); + if (!young_page_install(idx, cell_size)) { + // nursery still full (all survivor pages): give up on the + // nursery for this allocation and take the old path + return NULL; + } + } + void* p = _ejs_heap.bump[idx]; + _ejs_heap.bump[idx] = (char*)p + cell_size; + memset (p, 0, cell_size); + *(GCObjectHeader*)p = scan_type | EJS_GC_HEADER_YOUNG; + return p; +} + +// Full collections see young pages too. Active (bump-rule) pages have +// no valid FREE bits or num_free_cells, so normalize them to +// bitmap-authoritative survivor form first: cells below the bump are +// allocated, the rest free, and the page leaves bump service. After +// this the existing mark/sweep machinery handles them verbatim (their +// objects remain YOUNG by address range; the next minor collection +// evacuates or re-pins whatever survives the full GC). +static void +young_normalize_for_full_gc(void) +{ + if (!nursery_enabled) return; + young_flush_bumps(); + for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) + young_page_retire_current(i); + for (PageInfo* page = (PageInfo*)heap_priv.young_pages.head; page; page = page->next) { + if (page->young != 1) continue; + int allocated = 0; + for (int c = 0; c < CELLS_IN_PAGE(page); c++) { + if (young_cell_is_allocated(page, (uint32_t)c)) { + SET_ALLOCATED(page->page_bitmap[c]); + allocated++; + } else { + SET_FREE(page->page_bitmap[c]); + } + } + page->num_free_cells = page->num_cells - allocated; + page->young = 2; + } + heap_priv.young_alloced = 0; +} + +static void +nursery_init(void) +{ + // gc-P2 gate decision (2026-07-25): nursery ON by default; + // EJS_GC_NURSERY=off (or =0) selects the old collector for A/B. + { + char* e = getenv("EJS_GC_NURSERY"); + nursery_enabled = !(e && (strcmp(e, "off") == 0 || strcmp(e, "0") == 0)); + } + heap_priv.verify = getenv("EJS_GC_VERIFY") != NULL; + minor_spew = getenv("EJS_GC_MINOR_SPEW") != NULL; + gc_paranoid = getenv("EJS_GC_PARANOID") != NULL; + if (getenv("EJS_GC_WATCH")) + gc_watch_addr = (uintptr_t)strtoull(getenv("EJS_GC_WATCH"), NULL, 16); + // 1MB balances pause and throughput (measured 2026-07-25): minor p99 + // ~1.3ms on the bench corpus (512KB reaches 0.68ms at ~10% self- + // compile cost; 4MB buys self-compile ~3% at ~5ms p99) + heap_priv.young_budget = 1024 * 1024; + char* budget_env = getenv("EJS_GC_NURSERY_BUDGET"); + if (budget_env) heap_priv.young_budget = (size_t)atoll(budget_env); + if (!nursery_enabled) return; + + Arena* arena = arena_new(); + if (!arena) { + _ejs_log ("gc: could not allocate the nursery arena; nursery disabled\n"); + nursery_enabled = EJS_FALSE; + return; + } + arena->is_nursery = EJS_TRUE; + heap_priv.nursery_arena = arena; + _ejs_heap.nursery_base = (void*)arena; + _ejs_heap.nursery_end = arena->end; + _ejs_heap.remset = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); + _ejs_heap.remset_capacity = NURSERY_REMSET_CAPACITY; + heap_priv.remset_other = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); +} +// ===================== end gc-plan P2 nursery ============================== static void sweep_heap() @@ -1328,12 +2359,17 @@ _ejs_gc_push_generator(EJSGenerator* gen) abort(); } generators[generator_count++] = gen; + // gc-P2: keep the barrier's transient-slot bound on the CURRENT stack + _ejs_heap.current_stack_end = gen->stack + gen->stack_size; } void _ejs_gc_pop_generator() { generator_count--; + _ejs_heap.current_stack_end = generator_count > 0 + ? generators[generator_count - 1]->stack + generators[generator_count - 1]->stack_size + : (void*)stack_bottom; } static void @@ -1363,6 +2399,7 @@ mark_thread_stack() // mark a known heap object as a root (page cell or LOS both resolve // through find_page_and_cell; the pointer must be an object base) +static void minor_wl_push(GCObjectPtr p); static void mark_object_root(GCObjectPtr ptr) { @@ -1371,7 +2408,17 @@ mark_object_root(GCObjectPtr ptr) if (!page) return; BitmapCell cell = page->page_bitmap[cell_idx]; - if (IS_FREE(cell) || !IS_WHITE(cell)) + if (!cell_is_allocated(page, cell_idx, cell)) + return; + if (in_minor_gc) { + // gc-P2 minor: a young root pins; an old root's slots may hold + // young references, so queue it for the precise minor scan + // (duplicates are harmless — evacuation is idempotent) + if (page->young) minor_conservative_hit(page, cell_idx); + else minor_wl_push(ptr); + return; + } + if (!IS_WHITE(cell)) return; WORKLIST_PUSH_AND_GRAY_CELL(ptr, page->page_bitmap[cell_idx]); } @@ -1443,6 +2490,10 @@ _ejs_gc_collect_inner(EJSBool shutting_down) large_objs = 0; total_objs = 0; + // gc-P2: full collections need young pages in bitmap-authoritative + // form (active bump pages have no valid FREE bits or counts) + young_normalize_for_full_gc(); + #if gc_timings > 1 gettimeofday (&tvbefore, NULL); #endif @@ -1451,23 +2502,42 @@ _ejs_gc_collect_inner(EJSBool shutting_down) if (gc_profile) gettimeofday (&prof_tv_begin, NULL); + struct timeval fg[8]; if (!shutting_down) { + gettimeofday (&fg[0], NULL); mark_from_roots(); total_objs = num_roots; mark_from_modules(); + gettimeofday (&fg[1], NULL); mark_thread_stack(); mark_generator_stacks(); + gettimeofday (&fg[2], NULL); + + // gc-P2: dirty objects await their deferred minor scan and may + // hold the only reference to young data — root them + for (int i = 0; i < _ejs_heap.remset_count; i++) + mark_object_root((GCObjectPtr)_ejs_heap.remset[i]); + gettimeofday (&fg[3], NULL); process_worklist(); + gettimeofday (&fg[4], NULL); // gc-P0: survival + pin census must walk the heap BEFORE the // sweep frees the white cells if (gc_profile) profile_pre_sweep(); + gettimeofday (&fg[5], NULL); + if (gc_profile) { +#define FGUS(a,b) ((long long)(((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec))) + _ejs_log ("EJS_GC_PROFILE: full-gc phases: roots+modules=%lldus stacks=%lldus remset-roots=%lldus (remset=%d) worklist=%lldus census=%lldus\n", + FGUS(fg[0],fg[1]), FGUS(fg[1],fg[2]), FGUS(fg[2],fg[3]), + _ejs_heap.remset_count, FGUS(fg[3],fg[4]), FGUS(fg[4],fg[5])); +#undef FGUS + } } #if gc_timings > 1 @@ -1489,6 +2559,11 @@ _ejs_gc_collect_inner(EJSBool shutting_down) sweep_heap(); + // gc-P2: the remembered state may dangle into cells this sweep just + // freed — rebuild it from the live old gen + if (!shutting_down) + remset_rebuild_after_full_gc(); + if (gc_profile && !shutting_down) { gettimeofday (&prof_tv_end, NULL); uint64_t usec = (prof_tv_end.tv_sec - prof_tv_begin.tv_sec) * 1000000ULL @@ -1720,6 +2795,7 @@ alloc_from_los(size_t size, EJSScanType scan_type) rv->alloc_size = size; + conservative_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); EJS_LIST_PREPEND (rv, los_list); //_ejs_log ("alloc_from_los returning %p\n, los_list = %p\n", rv->page_info.page_start, los_list); return rv->page_info.page_start; @@ -1740,8 +2816,6 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) { GCObjectPtr rv = NULL; - alloc_size += size; - num_allocs ++; total_allocs ++; @@ -1752,6 +2826,45 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) case EJS_SCAN_TYPE_CLOSUREENV: num_closureenv_allocs ++; break; } + int bucket; + int bucket_size = MAX(pow2_ceil(size), 1< 0 + void* p = _ejs_heap.bump[idx]; + if (EJS_LIKELY((char*)p + bucket_size <= (char*)_ejs_heap.limit[idx])) { + _ejs_heap.bump[idx] = (char*)p + bucket_size; + memset (p, 0, bucket_size); + *(GCObjectHeader*)p = scan_type | EJS_GC_HEADER_YOUNG; + gc_watch_hit ("young-alloc-fast", p); + return p; + } + rv = young_alloc_slow(idx, bucket_size, scan_type); + if (rv) { gc_watch_hit ("young-alloc-slow", rv); return rv; } + // nursery unusable (pathologically pinned): fall through to the + // old allocator + } + + alloc_size += size; + if (!gc_disabled) { char *gc_reason = NULL; size_t gc_trigger = 60 * 1024 * 1024; @@ -1759,7 +2872,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) gc_trigger = heap_size_at_last_gc / 2; if (alloc_size - alloc_size_at_last_gc >= gc_trigger) { gc_reason = "alloc_size"; - } else if (collect_every_alloc && collect_every_alloc == num_allocs) { + } else if (!nursery_enabled && collect_every_alloc && collect_every_alloc == num_allocs) { gc_reason = "every_n_alloc"; } if (gc_reason) { @@ -1769,19 +2882,17 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) } } - int bucket; - int bucket_size = MAX(pow2_ceil(size), 1< OBJECT_SIZE_HIGH_LIMIT_BITS) { SPEW(2, _ejs_log ("need to alloc %zd from los!!!\n", size)); rv = alloc_from_los(size, scan_type); + if (rv && nursery_enabled) { + // LOS objects are old at birth: their construction stores + // bypass the barrier, so they start DIRTY and get a precise + // scan at the next minor + _ejs_gc_remember_slow(rv); + } if (rv == NULL) { if (num_allocs == 0) { _ejs_log ("los allocation (size = %d) failed twice, throwing", size); @@ -1866,6 +2977,31 @@ _ejs_gc_remove_root(ejsval* root) } } +// gc-plan P2 (object-remembering): mark `owner` dirty and queue it for +// the next minor's rescan. The inline half (ejs-gc.h) already filtered +// non-young values, young owners, and already-dirty owners. +void +_ejs_gc_remember_slow(void* owner) +{ + GCObjectHeader* h = (GCObjectHeader*)owner; + *h |= EJS_GC_HEADER_DIRTY; + EJSHeapContext* c = &_ejs_heap; + if (EJS_LIKELY(c->remset_count < c->remset_capacity)) + c->remset[c->remset_count++] = owner; + else + c->remset_overflowed = 1; +} + +// the emitted barrier's out-of-line half: emit.ts inlines only the +// value-is-young range check (double payloads may false-positive; the +// full filter reruns here) +void +_ejs_gc_remember_val(ejsval owner, ejsval val) +{ + void* p = (void*)EJSVAL_TO_GCTHING_IMPL(owner); + if (p) _ejs_gc_remember(p, val); +} + void _ejs_gc_mark_conservative_range(void* low, void* high) { // only the generator scan uses this entry point (suspended stacks + diff --git a/runtime/ejs-gc.h b/runtime/ejs-gc.h index 31cee9f4..9130fffe 100644 --- a/runtime/ejs-gc.h +++ b/runtime/ejs-gc.h @@ -84,6 +84,91 @@ _ejs_gc_forward(GCObjectPtr from, GCObjectPtr to) | EJS_GC_HEADER_FORWARDED; } +// ---- gc-plan P2: the heap context + generational write barrier ------------- +// +// ALL new collector state lives in the heap context (the Concurrency-II +// discipline: an isolate is "one more context", never "another pile of +// file statics"). The leading fields are THE emitted-code seam — the +// emitter (P2c) reads bump/limit/nursery bounds through this struct's +// exported symbol, so their order and offsets are part of the emitter +// contract: append, never reorder. +// +// The nursery is one dedicated arena, so "is young" is a raw range +// check — cheap enough for the inline write barrier and the emitted +// fast paths. With the nursery disabled (EJS_GC_NURSERY=off) the +// bounds are NULL and every check below degrades to a no-op / the +// old allocator path. + +#define EJS_GC_NUM_SIZE_CLASSES 5 // ffs buckets: 16/32/64/128/256 cells + +typedef struct { + // -- emitted-code seam (offsets fixed; append only) -- + void* bump[EJS_GC_NUM_SIZE_CLASSES]; // current young page cursor, per class + void* limit[EJS_GC_NUM_SIZE_CLASSES]; // current young page end, per class + void* nursery_base; // [base, end) = the nursery arena + void* nursery_end; + // -- the dirty-OBJECT buffer (object-remembering): OLD objects + // whose owned storage received a YOUNG reference; deduped by the + // DIRTY header bit. (The SATB log of gc-P6 rides the same + // structure.) -- + void** remset; + int32_t remset_count; + int32_t remset_capacity; + int32_t remset_overflowed; // fall back to a full old-gen scan this minor + // the top of the CURRENT machine stack (main stack bottom, or the + // running generator's stack end) — maintained by the generator + // push/pop hooks so the barrier can reject transient stack slots + void* current_stack_end; + // -- runtime-private state (an opaque struct in ejs-gc.c) -- + void* priv; +} EJSHeapContext; + +extern EJSHeapContext _ejs_heap; + +static inline EJSBool +_ejs_gc_is_young(void* p) +{ + return (char*)p >= (char*)_ejs_heap.nursery_base + && (char*)p < (char*)_ejs_heap.nursery_end; +} + +// The generational write barrier — OBJECT-REMEMBERING (gc-P2, second +// design). The first design recorded raw slot addresses; slots inside +// malloc'd satellites (element buffers, descriptors, map entries) kept +// dangling into freed memory — a structural hazard, not a bug tail. +// This design records the OWNING heap object instead: the minor rescans +// a dirty object through its Scan specop, which walks whatever storage +// the object owns AT SCAN TIME. No captured interior pointers, no +// lifetime coupling. Dedup is the DIRTY header bit; the buffer gets +// each old object at most once per cycle. +// +// Contract: after storing a traceable value anywhere in `owner`'s +// transitive OWNED storage (inline slots, element vector, property map, +// descriptors), call _ejs_gc_remember(owner_ptr, value). Young owners +// and non-young values filter out. +#define EJS_GC_HEADER_DIRTY (1ULL << 60) + +extern void _ejs_gc_remember_slow(void* owner); + +static inline void +_ejs_gc_remember(void* owner, ejsval newval) +{ + if (!EJSVAL_IS_TRACEABLE_IMPL(newval)) return; + void* target = (void*)EJSVAL_TO_GCTHING_IMPL(newval); + if (!_ejs_gc_is_young(target)) return; + if (_ejs_gc_is_young(owner)) return; + GCObjectHeaderWord* h = (GCObjectHeaderWord*)owner; + if (*h & EJS_GC_HEADER_DIRTY) return; + _ejs_gc_remember_slow(owner); +} + +// object-flavored convenience (most call sites hold the ejsval) +#define EJS_GC_REMEMBER(ownerval, v) \ + _ejs_gc_remember((void*)EJSVAL_TO_OBJECT_IMPL(ownerval), (v)) + +// object-flavored emitted entry (emit.ts passes the owner ejsval) +extern void _ejs_gc_remember_val(ejsval owner, ejsval val); + extern void _ejs_gc_add_root(ejsval *val); extern void _ejs_gc_remove_root(ejsval *root); diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index d844fefe..107233d0 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -65,7 +65,7 @@ static void _ejs_iterator_wrapper_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSIteratorWrapper* iter = (EJSIteratorWrapper*)obj; - scan_func(iter->iterator); + scan_func(&(iter->iterator)); _ejs_Object_specops.Scan (obj, scan_func); } @@ -131,6 +131,7 @@ _ejs_generator_start(EJSGenerator* gen) // mark_thread_stack's range depends on the chain). gen->completed = EJS_TRUE; gen->yielded_value = _ejs_create_iter_result(rv, _ejs_true); + _ejs_gc_remember(gen, gen->yielded_value); _ejs_gc_pop_generator(); } @@ -162,6 +163,10 @@ _ejs_generator_new (ejsval generator_body) rv->stack = malloc(GENERATOR_STACK_SIZE); rv->stack_size = GENERATOR_STACK_SIZE; rv->caller_stack_top = NULL; + rv->reg_prev = NULL; + rv->reg_next = _ejs_generator_registry; + if (_ejs_generator_registry) _ejs_generator_registry->reg_prev = rv; + _ejs_generator_registry = rv; getcontext(&rv->generator_context); rv->generator_context.uc_stack.ss_sp = rv->stack; rv->generator_context.uc_stack.ss_size = GENERATOR_STACK_SIZE; @@ -178,6 +183,7 @@ ejsval _ejs_generator_yield (ejsval generator, ejsval arg) { EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(generator); gen->yielded_value = _ejs_create_iter_result(arg, _ejs_false); + _ejs_gc_remember(gen, gen->yielded_value); gen->sent_value = _ejs_undefined; _ejs_gc_pop_generator(); @@ -206,6 +212,7 @@ _ejs_generator_send (ejsval generator, ejsval arg) { gen->started = EJS_TRUE; gen->yielded_value = _ejs_undefined; gen->sent_value = arg; + _ejs_gc_remember(gen, gen->sent_value); gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); return gen->yielded_value; @@ -280,6 +287,7 @@ static EJS_NATIVE_FUNC(_ejs_Generator_prototype_return) { gen->returning = EJS_TRUE; gen->yielded_value = _ejs_undefined; gen->sent_value = arg; + _ejs_gc_remember(gen, gen->sent_value); gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); return gen->yielded_value; @@ -349,21 +357,29 @@ _ejs_generator_specop_allocate() return (EJSObject*)_ejs_gc_new (EJSGenerator); } +// gc-plan P2: the live-generator registry — every generator's suspended +// stack must be conservatively scanned BEFORE a minor collection starts +// evacuating (see ejs-gc.c minor step 1) +EJSGenerator* _ejs_generator_registry; + static void _ejs_generator_specop_finalize (EJSObject* obj) { EJSGenerator* gen = (EJSGenerator*)obj; + if (gen->reg_next) gen->reg_next->reg_prev = gen->reg_prev; + if (gen->reg_prev) gen->reg_prev->reg_next = gen->reg_next; + if (_ejs_generator_registry == gen) _ejs_generator_registry = gen->reg_next; free (gen->stack); } -static void -_ejs_generator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) +// the conservative half of the generator scan: both saved register +// files (the ucontexts) and the live suspended stack segment. Shared +// by the specop scan and the minor collection's pre-evacuation registry +// walk (gc-plan P2: conservative ranges must all be seen before any +// object moves). +void +_ejs_generator_scan_conservative (EJSGenerator* gen) { - EJSGenerator* gen = (EJSGenerator*)obj; - scan_func(gen->body); - scan_func(gen->yielded_value); - scan_func(gen->sent_value); - _ejs_gc_mark_conservative_range(&gen->generator_context, (char*)&gen->generator_context + sizeof(ucontext_t)); _ejs_gc_mark_conservative_range(&gen->caller_context, (char*)&gen->caller_context + sizeof(ucontext_t)); @@ -404,6 +420,17 @@ _ejs_generator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) saved_sp = gen->stack; _ejs_gc_mark_conservative_range(saved_sp, stack_end); } +} + +static void +_ejs_generator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) +{ + EJSGenerator* gen = (EJSGenerator*)obj; + scan_func(&(gen->body)); + scan_func(&(gen->yielded_value)); + scan_func(&(gen->sent_value)); + + _ejs_generator_scan_conservative (gen); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-generator.h b/runtime/ejs-generator.h index 2bff082b..56c3b80e 100644 --- a/runtime/ejs-generator.h +++ b/runtime/ejs-generator.h @@ -13,7 +13,7 @@ EJS_BEGIN_DECLS #define EJSVAL_IS_GENERATOR(v) (EJSVAL_IS_OBJECT(v) && (EJSVAL_TO_OBJECT(v)->ops == &_ejs_Generator_specops)) -typedef struct { +typedef struct _EJSGenerator { /* object header */ EJSObject obj; @@ -39,6 +39,13 @@ typedef struct { void* stack; size_t stack_size; + // gc-plan P2: all live generators sit on a registry so a minor + // collection can scan every suspended stack CONSERVATIVELY before + // any evacuation — a generator discovered mid-trace would pin its + // stack referents too late (they may already have moved) + struct _EJSGenerator* reg_next; + struct _EJSGenerator* reg_prev; + // the caller-side stack position recorded just before each swap INTO // this generator (the address of a local in the resuming frame). While // the generator runs, its caller's frames live ABOVE this address (the @@ -77,6 +84,12 @@ extern void _ejs_iterator_init_proto (); extern void _ejs_gc_push_generator(EJSGenerator *gen); extern void _ejs_gc_pop_generator(); +/* gc-plan P2: the live-generator registry (ejs-generator.c) + the + conservative half of the generator scan, shared by the specop and the + minor collection's pre-evacuation pass */ +extern EJSGenerator* _ejs_generator_registry; +extern void _ejs_generator_scan_conservative(EJSGenerator* gen); + EJS_END_DECLS #endif diff --git a/runtime/ejs-map.c b/runtime/ejs-map.c index 1018db32..0c0cbbef 100644 --- a/runtime/ejs-map.c +++ b/runtime/ejs-map.c @@ -273,6 +273,7 @@ _ejs_map_set (ejsval map, ejsval key, ejsval value) if (!EJSVAL_IS_NO_ITER_VALUE_MAGIC(p->key) && SameValueZero (p->key, key)) { // i. Set p.[[value]] to value. p->value = value; + _ejs_gc_remember(_map, p->value); // ii. Return M. return map; } @@ -284,7 +285,9 @@ _ejs_map_set (ejsval map, ejsval key, ejsval value) // 7. Let p be the Record {[[key]]: key, [[value]]: value}. p = calloc (1, sizeof (EJSKeyValueEntry)); p->key = key; + _ejs_gc_remember(_map, p->key); p->value = value; + _ejs_gc_remember(_map, p->value); // 8. Append p as the last element of entries. if (!_map->head_insert) @@ -651,8 +654,8 @@ _ejs_map_specop_scan (EJSObject* obj, EJSValueFunc scan_func) EJSMap* map = (EJSMap*)obj; for (EJSKeyValueEntry *s = map->head_insert; s; s = s->next_insert) { - scan_func (s->key); - scan_func (s->value); + scan_func (&(s->key)); + scan_func (&(s->value)); } _ejs_Object_specops.Scan (obj, scan_func); @@ -682,7 +685,7 @@ static void _ejs_map_iterator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSMapIterator* iter = (EJSMapIterator*)obj; - scan_func(iter->iterated); + scan_func(&(iter->iterated)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-module.c b/runtime/ejs-module.c index 58149bca..822a5d5a 100644 --- a/runtime/ejs-module.c +++ b/runtime/ejs-module.c @@ -40,7 +40,7 @@ _ejs_module_specop_scan (EJSObject* obj, EJSValueFunc scan_func) EJSModule *module = (EJSModule*)obj; for (int i = 0; i < module->num_exports; i ++) - scan_func(module->exports[i]); + scan_func(&(module->exports[i])); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 0684acc2..efb3bcdf 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -422,7 +422,7 @@ _ejs_propertymap_foreach_value (EJSPropertyMap* map, EJSValueFunc foreach_func) { for (_EJSPropertyMapEntry *s = map->head_insert; s; s = s->next_insert) { if (_ejs_property_desc_has_value (s->desc)) - foreach_func(s->desc->value); + foreach_func(&(s->desc->value)); } } @@ -615,6 +615,7 @@ shaped_ensure_capacity (EJSObject* obj, uint32_t needed) memcpy (EJSVAL_TO_CLOSUREENV_IMPL(newslots)->slots, shaped_slots(obj), cap * sizeof(ejsval)); obj->slots = newslots; + _ejs_gc_remember(obj, newslots); } // one-way migration to dictionary mode: materialize the map from the @@ -710,6 +711,8 @@ try_fill_shaped (ejsval objval, uint32_t argc, const ejsval* names, ejsval* valu } shaped_ensure_capacity (obj, argc); memcpy (shaped_slots(obj), values, argc * sizeof(ejsval)); + for (uint32_t _wb = 0; _wb < (uint32_t)argc; _wb++) + _ejs_gc_remember(shaped_env(obj), values[_wb]); EJS_OBJECT_SET_SHAPE(obj, shape); return EJS_TRUE; } @@ -799,10 +802,10 @@ _ejs_property_iterator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSPropertyIterator *iter = (EJSPropertyIterator*)obj; - scan_func (iter->forObj); + scan_func (&(iter->forObj)); for (int i = 0; i < iter->num; i ++) { - scan_func (iter->keys[i]); + scan_func (&(iter->keys[i])); } } @@ -1518,6 +1521,7 @@ static EJS_NATIVE_FUNC(_ejs_Object_create) { /* 3. Set the [[Prototype]] internal property of obj to O. */ EJSVAL_TO_OBJECT(obj)->proto = O; + _ejs_gc_remember(EJSVAL_TO_OBJECT(obj), O); /* 4. If the argument Properties is present and not undefined, add own properties to obj as if by calling the */ /* standard built-in function Object.defineProperties with arguments obj and Properties. */ @@ -2301,6 +2305,7 @@ _ejs_object_specop_set_prototype_of (ejsval O, ejsval V) // 9. Set the value of the [[Prototype]] internal slot of O to V. O_->proto = V; + _ejs_gc_remember(O_, V); // 10. Return true. return EJS_TRUE; @@ -2415,6 +2420,7 @@ _ejs_object_specop_set (ejsval O, ejsval P, ejsval V, ejsval Receiver) if (next_shape != EJS_SHAPE_DICT) { EJS_OBJECT_SET_SHAPE(O_, next_shape); shaped_slots(O_)[slot] = V; + _ejs_gc_remember(shaped_env(O_), V); return EJS_TRUE; } // shape-table overflow: drop to dictionary mode and let the @@ -2556,6 +2562,16 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des EJSObject* obj = EJSVAL_TO_OBJECT(O); + // gc-plan P2 (object-remembering): every storage path below — + // shaped slot, map insert, in-place descriptor update — installs + // these values somewhere in obj's owned storage. Marking up front + // is at worst conservative (a rejected define dirties one object + // for one cycle). + _ejs_gc_remember(obj, P); + if (_ejs_property_desc_has_value(Desc)) _ejs_gc_remember(obj, Desc->value); + if (_ejs_property_desc_has_getter(Desc)) _ejs_gc_remember(obj, Desc->getter); + if (_ejs_property_desc_has_setter(Desc)) _ejs_gc_remember(obj, Desc->setter); + // shapes P4.2: route shaped objects up front. Plain default- // attribute data properties live in slot storage; anything the // shaped world can't express migrates to dictionary mode and falls @@ -2586,6 +2602,7 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des else { EJS_OBJECT_SET_SHAPE(obj, next_shape); shaped_slots(obj)[slot] = value; + _ejs_gc_remember(shaped_env(obj), value); return EJS_TRUE; } } @@ -2611,6 +2628,7 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des shaped_ensure_capacity (obj, nfields); EJS_OBJECT_SET_SHAPE(obj, next_shape); shaped_slots(obj)[nfields - 1] = value; + _ejs_gc_remember(shaped_env(obj), value); return EJS_TRUE; } } @@ -2800,19 +2818,26 @@ _ejs_object_specop_finalize(EJSObject* obj) obj->map = NULL; } +// gc-plan P2: walk the entries directly so every scanned slot is the +// REAL storage location (the old foreach_property shim passed the name +// by value — a moved name's rewrite would have landed in a local copy). +// Property names are content-hashed, so a moving name never invalidates +// the buckets; descs are malloc'd and stay put. static void -scan_property (ejsval name, EJSPropertyDesc *desc, EJSValueFunc scan_func) +scan_property_entries (EJSPropertyMap* map, EJSValueFunc scan_func) { - scan_func (name); + for (_EJSPropertyMapEntry *s = map->head_insert; s; s = s->next_insert) { + scan_func (&s->name); - if (_ejs_property_desc_has_value (desc)) { - scan_func (desc->value); - } - if (_ejs_property_desc_has_getter (desc)) { - scan_func (desc->getter); - } - if (_ejs_property_desc_has_setter (desc)) { - scan_func (desc->setter); + if (_ejs_property_desc_has_value (s->desc)) { + scan_func (&s->desc->value); + } + if (_ejs_property_desc_has_getter (s->desc)) { + scan_func (&s->desc->getter); + } + if (_ejs_property_desc_has_setter (s->desc)) { + scan_func (&s->desc->setter); + } } } @@ -2824,12 +2849,12 @@ _ejs_object_specop_scan (EJSObject* obj, EJSValueFunc scan_func) // global shape table if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { if (!EJSVAL_IS_NULL(obj->slots)) - scan_func (obj->slots); - scan_func (obj->proto); + scan_func (&(obj->slots)); + scan_func (&(obj->proto)); return; } - _ejs_propertymap_foreach_property (obj->map, (EJSPropertyDescFunc)scan_property, scan_func); - scan_func (obj->proto); + scan_property_entries (obj->map, scan_func); + scan_func (&(obj->proto)); } // ECMA262: 9.1.3 [[IsExtensible]] ( ) diff --git a/runtime/ejs-promise.c b/runtime/ejs-promise.c index cdf92b86..b03fe447 100644 --- a/runtime/ejs-promise.c +++ b/runtime/ejs-promise.c @@ -127,6 +127,7 @@ static ejsval RejectPromise (ejsval promise, ejsval reason) // 3. Set the value of promise's [[PromiseResult]] internal slot to reason. _promise->result = reason; + _ejs_gc_remember(_promise, _promise->result); // 4. Set the value of promise's [[PromiseFulfillReactions]] internal slot to undefined. // XXX we need to free our listnodes @@ -158,6 +159,7 @@ static ejsval FulfillPromise (ejsval promise, ejsval resolutionValue) EJSPromiseReaction* reactions = _promise->fulfillReactions; // 3. Set the value of promise's [[PromiseResult]] internal slot to resolutionvalue. _promise->result = resolutionValue; + _ejs_gc_remember(_promise, _promise->result); // 4. Set the value of promise's [[PromiseFulfullReactions]] internal slot to undefined. // XXX we need to free our listnodes @@ -288,6 +290,7 @@ CreateResolvingFunctions(ejsval promise, ejsval* out_resolve, ejsval* out_reject ejsval resolvingFunctions_env = _ejs_closureenv_new(2); *_ejs_closureenv_get_slot_ref(resolvingFunctions_env, 0) = _ejs_false; *_ejs_closureenv_get_slot_ref(resolvingFunctions_env, 1) = promise; + EJS_GC_REMEMBER(resolvingFunctions_env, promise); // 2. Let resolve be a new built-in function object as defined in Promise Resolve Functions (25.4.1.4). // 3. Set the [[Promise]] internal slot of resolve to promise. @@ -957,17 +960,17 @@ _ejs_promise_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSPromise* promise = (EJSPromise*)obj; - scan_func(promise->result); - scan_func(promise->constructor); + scan_func(&(promise->result)); + scan_func(&(promise->constructor)); for (EJSPromiseReaction* reaction = promise->fulfillReactions; reaction; reaction = reaction->next) { - scan_func(reaction->capabilities); - scan_func(reaction->handler); + scan_func(&(reaction->capabilities)); + scan_func(&(reaction->handler)); } for (EJSPromiseReaction* reaction = promise->rejectReactions; reaction; reaction = reaction->next) { - scan_func(reaction->capabilities); - scan_func(reaction->handler); + scan_func(&(reaction->capabilities)); + scan_func(&(reaction->handler)); } _ejs_Object_specops.Scan (obj, scan_func); diff --git a/runtime/ejs-proxy.c b/runtime/ejs-proxy.c index d515f48b..b5d44295 100644 --- a/runtime/ejs-proxy.c +++ b/runtime/ejs-proxy.c @@ -838,8 +838,8 @@ static void _ejs_proxy_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSProxy* proxy = (EJSProxy*)obj; - scan_func(proxy->target); - scan_func(proxy->handler); + scan_func(&(proxy->target)); + scan_func(&(proxy->handler)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-regexp.c b/runtime/ejs-regexp.c index 998b4c5a..8269ad01 100644 --- a/runtime/ejs-regexp.c +++ b/runtime/ejs-regexp.c @@ -1208,8 +1208,8 @@ static void _ejs_regexp_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSRegExp *re = (EJSRegExp*)obj; - scan_func (re->pattern); - scan_func (re->flags); + scan_func (&(re->pattern)); + scan_func (&(re->flags)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-set.c b/runtime/ejs-set.c index 7052b752..3944a3a5 100644 --- a/runtime/ejs-set.c +++ b/runtime/ejs-set.c @@ -230,6 +230,7 @@ _ejs_set_add(ejsval S, ejsval value) // 8. Append value as the last element of entries. e = calloc (1, sizeof (EJSSetValueEntry)); e->value = value; + _ejs_gc_remember(_set, e->value); if (!_set->head_insert) _set->head_insert = e; @@ -589,7 +590,7 @@ _ejs_set_specop_scan (EJSObject* obj, EJSValueFunc scan_func) EJSSet* set = (EJSSet*)obj; for (EJSSetValueEntry *s = set->head_insert; s; s = s->next_insert) - scan_func (s->value); + scan_func (&(s->value)); _ejs_Object_specops.Scan (obj, scan_func); } @@ -618,7 +619,7 @@ static void _ejs_set_iterator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSSetIterator* iter = (EJSSetIterator*)obj; - scan_func(iter->iterated); + scan_func(&(iter->iterated)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-string.c b/runtime/ejs-string.c index 4fe2a3f9..99e4f392 100644 --- a/runtime/ejs-string.c +++ b/runtime/ejs-string.c @@ -1941,7 +1941,7 @@ static void _ejs_string_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSString* ejss = (EJSString*)obj; - scan_func (ejss->primStr); + scan_func (&(ejss->primStr)); _ejs_Object_specops.Scan (obj, scan_func); } @@ -1971,7 +1971,7 @@ static void _ejs_string_iterator_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSStringIterator* iter = (EJSStringIterator*)obj; - scan_func(iter->iterated); + scan_func(&(iter->iterated)); _ejs_Object_specops.Scan (obj, scan_func); } @@ -2211,6 +2211,10 @@ static void flatten_dep (jschar **p, EJSPrimString *n, int* off, int* len); static void flatten_rope (jschar **p, EJSPrimString *n) { + if ((n->gc_header & 0xffffffff) == 0xafafafaf) { + _ejs_log ("flatten_rope: POISONED node %p\n", (void*)n); + abort(); + } switch (EJS_PRIMSTR_GET_TYPE(n)) { case EJS_STRING_FLAT: memmove (*p, n->data.flat, n->length * sizeof(jschar)); diff --git a/runtime/ejs-symbol.c b/runtime/ejs-symbol.c index 536ead1d..f6e67cc9 100644 --- a/runtime/ejs-symbol.c +++ b/runtime/ejs-symbol.c @@ -221,7 +221,7 @@ _ejs_symbol_specop_allocate () static void _ejs_symbol_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { - scan_func(((EJSSymbol*)obj)->primSymbol); + scan_func(&(((EJSSymbol*)obj)->primSymbol)); } EJS_DEFINE_CLASS(Symbol, diff --git a/runtime/ejs-typedarrays.c b/runtime/ejs-typedarrays.c index d348cc70..13106af3 100644 --- a/runtime/ejs-typedarrays.c +++ b/runtime/ejs-typedarrays.c @@ -2487,7 +2487,7 @@ _ejs_arraybuffer_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSArrayBuffer *arraybuf = (EJSArrayBuffer*)obj; if (arraybuf->dependent) { - scan_func (arraybuf->data.dependent.buf); + scan_func (&(arraybuf->data.dependent.buf)); } _ejs_Object_specops.Scan (obj, scan_func); } @@ -2529,7 +2529,7 @@ static void _ejs_typedarray_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSTypedArray *arr = (EJSTypedArray*)obj; - scan_func(arr->buffer); + scan_func(&(arr->buffer)); _ejs_Object_specops.Scan (obj, scan_func); } @@ -2661,7 +2661,7 @@ static void _ejs_dataview_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { EJSDataView *view = (EJSDataView*)obj; - scan_func (view->buffer); + scan_func (&(view->buffer)); _ejs_Object_specops.Scan (obj, scan_func); } diff --git a/runtime/ejs-types.h b/runtime/ejs-types.h index 87189e6c..cdc77fe7 100644 --- a/runtime/ejs-types.h +++ b/runtime/ejs-types.h @@ -43,7 +43,9 @@ typedef uint16_t jschar; // bit 59 FORWARDED — the word is a forwarding record, not a // header: target address in bits 0-46 (gc-P1; see // ejs-gc.h _ejs_gc_forward) -// bits 60-63 reserved for the GC (mark/card, gc-P2+) +// bit 60 DIRTY — the object is in the generational remembered +// buffer (gc-P2 object-remembering write barrier) +// bits 61-63 reserved for the GC (mark/card, gc-P4+) // // EJSObject absorbs the widening into what was padding (sizeof // unchanged); EJSPrimString/EJSPrimSymbol keep their sizes; EJSClosureEnv diff --git a/runtime/ejs-value.h b/runtime/ejs-value.h index 81a2050c..fda9ae92 100644 --- a/runtime/ejs-value.h +++ b/runtime/ejs-value.h @@ -59,7 +59,10 @@ ejsval _ejs_number_new (double value); void _ejs_value_finalize(ejsval val); -typedef void (*EJSValueFunc)(ejsval value); +// gc-plan P2: scan callbacks take the SLOT, not the value — the mover +// rewrites *slot when the referent is evacuated. Non-moving consumers +// (the old mark path) simply read through it. +typedef void (*EJSValueFunc)(ejsval* slot); EJS_END_DECLS diff --git a/test/expected/gc-envwb1.js.expected-out b/test/expected/gc-envwb1.js.expected-out new file mode 100644 index 00000000..d81cc071 --- /dev/null +++ b/test/expected/gc-envwb1.js.expected-out @@ -0,0 +1 @@ +42 diff --git a/test/expected/gc-gennest.js.expected-out b/test/expected/gc-gennest.js.expected-out new file mode 100644 index 00000000..83bc2e06 --- /dev/null +++ b/test/expected/gc-gennest.js.expected-out @@ -0,0 +1,3 @@ +30 +in3 +10 diff --git a/test/expected/gc-gens1small.js.expected-out b/test/expected/gc-gens1small.js.expected-out new file mode 100644 index 00000000..b0918d9b --- /dev/null +++ b/test/expected/gc-gens1small.js.expected-out @@ -0,0 +1 @@ +0,1000,2000,3000,78000 diff --git a/test/expected/gc-gens2small.js.expected-out b/test/expected/gc-gens2small.js.expected-out new file mode 100644 index 00000000..eb60c3fd --- /dev/null +++ b/test/expected/gc-gens2small.js.expected-out @@ -0,0 +1,3 @@ +0 +12348 +before diff --git a/test/expected/gc-genstress1.js.expected-out b/test/expected/gc-genstress1.js.expected-out new file mode 100644 index 00000000..0d364ef2 --- /dev/null +++ b/test/expected/gc-genstress1.js.expected-out @@ -0,0 +1 @@ +0,50000,100000,150000,1900000 diff --git a/test/expected/gc-genstress2.js.expected-out b/test/expected/gc-genstress2.js.expected-out new file mode 100644 index 00000000..eb60c3fd --- /dev/null +++ b/test/expected/gc-genstress2.js.expected-out @@ -0,0 +1,3 @@ +0 +12348 +before diff --git a/test/expected/gc-ropes1.js.expected-out b/test/expected/gc-ropes1.js.expected-out new file mode 100644 index 00000000..b5ac53a9 --- /dev/null +++ b/test/expected/gc-ropes1.js.expected-out @@ -0,0 +1,3 @@ +190 +,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9 +true diff --git a/test/expected/gc-ropes2.js.expected-out b/test/expected/gc-ropes2.js.expected-out new file mode 100644 index 00000000..ab4aa996 --- /dev/null +++ b/test/expected/gc-ropes2.js.expected-out @@ -0,0 +1,2 @@ +190 +,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9 diff --git a/test/gc-envwb1.js b/test/gc-envwb1.js new file mode 100644 index 00000000..9fcaee43 --- /dev/null +++ b/test/gc-envwb1.js @@ -0,0 +1,10 @@ +function mk() { + var x = null; + return { set: function (v) { x = v; }, get: function () { return x; } }; +} +var c = mk(); +function churn(n) { var t = []; for (var i = 0; i < n; i++) t.push({ p: i }); return t.length; } +churn(2000); +c.set({ fresh: 42 }); +churn(2000); +console.log(c.get().fresh); diff --git a/test/gc-gennest.js b/test/gc-gennest.js new file mode 100644 index 00000000..4a6962e1 --- /dev/null +++ b/test/gc-gennest.js @@ -0,0 +1,24 @@ +// nested active generators: A's body drives B while both hold stack-only refs +function* inner(base) { + var box = { v: base * 10, tag: "in" + base }; + yield box.v; + yield box.tag; +} +function* outer() { + var mine = { w: 7, s: [1, 2, 3] }; + var it = inner(3); + yield it.next().value; // B active inside A + yield it.next().value; + yield mine.w + mine.s.length; +} +function churn(n) { + var t = 0; + for (var i = 0; i < n; i++) { var o = { p: i }; t += o.p % 3; } + return t; +} +var it = outer(); +console.log(it.next().value); +churn(6000); +console.log(it.next().value); +churn(6000); +console.log(it.next().value); diff --git a/test/gc-gens1small.js b/test/gc-gens1small.js new file mode 100644 index 00000000..567c1641 --- /dev/null +++ b/test/gc-gens1small.js @@ -0,0 +1,15 @@ +function* g() { + var keep = []; + for (var i = 0; i < 4000; i++) { + keep.push({ a: i, b: i + 1 }); + if (i % 1000 === 0) yield i; + } + var sum = 0; + for (var j = 0; j < keep.length; j += 100) sum += keep[j].a; + yield sum; +} +var it = g(); +var r = it.next(); +var out = []; +while (!r.done) { out.push(r.value); r = it.next(); } +console.log(out.join(",")); diff --git a/test/gc-gens2small.js b/test/gc-gens2small.js new file mode 100644 index 00000000..dad95ad6 --- /dev/null +++ b/test/gc-gens2small.js @@ -0,0 +1,18 @@ +function* h() { + var local = { x: 12345, s: "before" }; + var arr = [1, 2, 3]; + yield 0; + yield local.x + arr.length; + yield local.s; +} +function churn(n) { + var t = 0; + for (var i = 0; i < n; i++) { var o = { p: i, q: [i, i] }; t += o.p; } + return t; +} +var it = h(); +console.log(it.next().value); +churn(8000); +console.log(it.next().value); +churn(8000); +console.log(it.next().value); diff --git a/test/gc-genstress1.js b/test/gc-genstress1.js new file mode 100644 index 00000000..8003f850 --- /dev/null +++ b/test/gc-genstress1.js @@ -0,0 +1,16 @@ +// GC triggers while running ON the generator's stack +function* g() { + var keep = []; + for (var i = 0; i < 200000; i++) { + keep.push({ a: i, b: i + 1 }); + if (i % 50000 === 0) yield i; + } + var sum = 0; + for (var j = 0; j < keep.length; j += 10000) sum += keep[j].a; + yield sum; +} +var it = g(); +var r = it.next(); +var out = []; +while (!r.done) { out.push(r.value); r = it.next(); } +console.log(out.join(",")); diff --git a/test/gc-genstress2.js b/test/gc-genstress2.js new file mode 100644 index 00000000..01805380 --- /dev/null +++ b/test/gc-genstress2.js @@ -0,0 +1,20 @@ +// values whose ONLY reference lives in a suspended generator's stack +// frames, across GCs forced from the main stack +function* h() { + var local = { x: 12345, s: "before" }; + var arr = [1, 2, 3]; + yield 0; // suspend with local/arr live only here + yield local.x + arr.length; // use them after resumes+GCs + yield local.s; +} +function churn(n) { + var t = 0; + for (var i = 0; i < n; i++) { var o = { p: i, q: [i, i] }; t += o.p; } + return t; +} +var it = h(); +console.log(it.next().value); +churn(400000); // force collections while h is suspended +console.log(it.next().value); +churn(400000); +console.log(it.next().value); diff --git a/test/gc-ropes1.js b/test/gc-ropes1.js new file mode 100644 index 00000000..a7d5924f --- /dev/null +++ b/test/gc-ropes1.js @@ -0,0 +1,7 @@ +var parts = []; +for (var i = 0; i < 50; i++) parts.push("x" + i); +var s = ""; +for (var i = 0; i < 50; i++) s = s + "," + parts[i]; +console.log(s.length); +console.log(s.substring(0, 30)); +console.log(s === s.split("").join("")); diff --git a/test/gc-ropes2.js b/test/gc-ropes2.js new file mode 100644 index 00000000..b9509e2b --- /dev/null +++ b/test/gc-ropes2.js @@ -0,0 +1,10 @@ +function build() { + var parts = []; + for (var i = 0; i < 50; i++) parts.push("x" + i); + var s = ""; + for (var i = 0; i < 50; i++) s = s + "," + parts[i]; + return s; +} +var out = build(); +console.log(out.length); +console.log(out.substring(0, 30)); From 78d580938d5a84ebfa4a165415409f1e538c3daa Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 25 Jul 2026 11:37:37 -0700 Subject: [PATCH 115/146] =?UTF-8?q?eir:=20sinking-plan=20S1=20=E2=80=94=20?= =?UTF-8?q?shaped-literal=20allocation=20sinking?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit docs/sinking-plan.md is the phase doc: it inventories where the plans.md sinking ladder actually stands (env scalar replacement, unshaped make_object/make_array sinking, and the iterator-wrapper peephole all landed long ago), names the gap — under --types every static literal lowers to make_object_shaped, which the existing sinkAlloc never matched — and records the S2 design (epoch-guarded constructor-result sinking) plus WHY ctor sinking cannot be a static transform: constructor stores are [[Set]] semantics, intercepted by prototype accessors, which is exactly why P4.4 guarded its batched fill at runtime instead of eliding anything. Object literals are define-semantics, so S1 is static. S1: sinkShapedAlloc in the optimizer's main fixpoint. For a non-escaping, never-written make_object_shaped the birth shape is invariant for the object's whole lifetime, so its has_shape guards resolve statically: TRUE when every f64-repr field's operand is provably a number (box_f64 / number const — folding true exposes raw slot_loads), otherwise FALSE — always sound, the diamond's arms are twins and the generic arm's reads fold to the same operands. Guard branches rewrite via condBrToBr; sweepUnreachableBlocks (both now exported from optimize-guards) reclaims the dead arms each round; slot_loads fold to the raw source of their field's box (or a minted f64_const), get_prop_atom own-field reads fold to the operand, and the drained alloc dies through DCE (shaped ops join the own-storage exemption; a shaped alloc reaching DCE counts as the sink completing). Everything else — writes, edge args, call/construct operands, computed access, non-own reads — fails closed. The canonical reduction: `{a: n, b: n+1}; return o.a + o.b` in a typed clone compiles to two f64_adds and a return — allocation, guards, boxes, and slot loads all gone, with the P3.4/P4.5 raw-join machinery carrying the folded operands through the emptied joins. Telemetry: shape_allocs_sunk / shape_guards_sunk on the EIR-opt stats line. Bisect: EJS_NO_SHAPED_SINK. Gate: 187 EIR unit tests (8 new: full sink; escape, call-operand, write, prototype-read, wrong-shape, and hand-built unprovable-repr refusals; bisect hook), --types diff lane 485 identical / 0 divergent / 1 N/A over 486 files, matrix x7 green at 418 tests/stage lane including the new suite tests types-sink1/2 (node-identical), types-bench2 unchanged at 0.65s as the doc predicts (its allocations are S2's constructor case). Co-Authored-By: Claude Fable 5 --- docs/sinking-plan.md | 231 ++++++++++++++++++++++ lib/eir/integrate.ts | 8 +- lib/eir/optimize-guards.ts | 4 +- lib/eir/optimize.ts | 199 ++++++++++++++++++- lib/eir/tests.ts | 139 +++++++++++++ test/expected/types-sink1.js.expected-out | 1 + test/expected/types-sink2.js.expected-out | 1 + test/types-sink1.js | 12 ++ test/types-sink2.js | 7 + 9 files changed, 594 insertions(+), 8 deletions(-) create mode 100644 docs/sinking-plan.md create mode 100644 test/expected/types-sink1.js.expected-out create mode 100644 test/expected/types-sink2.js.expected-out create mode 100644 test/types-sink1.js create mode 100644 test/types-sink2.js diff --git a/docs/sinking-plan.md b/docs/sinking-plan.md new file mode 100644 index 00000000..bf2fbf2e --- /dev/null +++ b/docs/sinking-plan.md @@ -0,0 +1,231 @@ +# Allocation sinking: the shaped world (plans.md "the big one", continued) + +Status: S1 LANDED (2026-07-25) — see "S1 results" at the bottom. Owner doc for extending escape analysis + +allocation sinking (docs/plans.md, optimization phase, first bullet) +past what already exists. Written 2026-07-25, after gc-P2. + +## Where we actually are + +The plans.md ladder is further along than its checkbox suggests: + +- **Rung 1 (`make_env`)** — landed. `scalarReplaceEnvs` + (lib/eir/optimize.ts) scalar-replaces non-escaping closure + environments; the EIR inliner (`inlineDirectCalls`) exposes IIFE envs + to it. +- **Rung 2 (`make_object`/`make_array` + own-key folding)** — landed + *for the unshaped ops*. `sinkAlloc` (optimize.ts:212) folds own-key + `get_prop_atom` / const-index `get_prop` / `.length` reads to the + allocation's operands and deletes write-only allocations. +- **Rung 3 (iterator-wrapper peephole)** — landed + (`foldIteratorWrappers`): dense-array destructuring walks fold to + direct element reads. +- **Rung 4 (`rest_args`/`args_obj`)** — not started (unchanged). + +What broke the ladder: **shapes**. Under `--types`, every +statically-keyed literal lowers to `make_object_shaped` (P4.4 +born-with-shape), and every oracle-typed property read lowers to a +`has_shape` diamond (`slot_load` fast arm, `get_prop_atom` slow arm). +`sinkAlloc` matches neither op, so in exactly the compiles where +performance matters, rung 2 no longer fires. Constructor results +(`construct` of a born-shaped ctor) were never covered by any rung. + +Measured stake (types-bench2, 2026-07-25, nursery default-on): 0.64 s +vs node's 0.06 s warm. The `alloc()` loop allocates 4M Points × (1 +wrapper object + 1 slot-array env) plus fill and guard dispatch, all of +it provably dead — node deletes the allocation outright via escape +analysis + scalar replacement. This phase rebuilds that ability for +the shaped world. + +## Design + +### S1 — shaped-literal sinking (statically sound) + +Extend `sinkAllocations` to `make_object_shaped` candidates. A shaped +allocation's shape is an immediate (`imms.shape` keyed into +`Module.shapes`) and its operands are the field values in shape order, +boxed — there are no separate initializing stores. Use classification +(fail-closed, mirroring `classifyUses`): + +- `has_shape(o, S)` whose **only** consumer is its block's `cond_br` — + a guard, resolvable statically (below); +- `slot_load(o, S=alloc shape, slot=k)` in base position — own read; +- `get_prop_atom(o, atom)` in base position — own read iff `atom` + names a shape field, else a prototype read (unfoldable, blocks + removal, same as unshaped); +- **anything else escapes** — including every write (`slot_store`, + `set_prop_atom`), edge args, call/return/throw operands, value + positions, `get_prop` computed reads (v1 keeps writes out entirely; + the unshaped pass's flow-insensitive written-atom skip doesn't carry + over because a write would also invalidate guard folding). + +**Guard resolution.** For a non-escaping, never-written shaped +allocation the birth shape is invariant for the object's whole +lifetime — nothing else can transition it, so the verifier's WRITE|CALL +kill inventory (which models *other* code mutating the receiver) does +not apply. `has_shape(o, S)`: + +- `S ≠ birth shape` → fold false (branch to the false edge). +- `S = birth shape` → fold **true only if every f64-repr field's + operand is provably a number** (a `box_f64` or a number `const`); + otherwise fold **false**. Both directions are sound: the fast and + slow arms of a shape diamond are twins computing the same value, so + routing to the generic arm never changes semantics — and the folded + reads collapse to the same operand either way. The repr condition + exists because folding true exposes `slot_load repr=f64`, whose + result we fold to the *raw* source of the operand's `box_f64`; + feeding that from a non-number would manufacture garbage bits. (The + runtime enforces the same invariant dynamically: `fill/make_shaped` + re-derive the true shape from actual values, so a lying-repr operand + makes the runtime object's shape differ from the static key — the + fold-false route is the static mirror of that re-derivation.) + +Folding a guard = `condBrToBr` + drop the now-unused `has_shape` +(pure); `sweepUnreachableBlocks` reclaims the dead arm. Both helpers +already exist in optimize-guards.ts. + +**Read folding.** `slot_load slot=k repr=f64` → the operand of the +field value's `box_f64` (raw f64, type-preserving — verifier needs no +change); `repr=boxed` → the operand itself. `get_prop_atom` for field +`name` → the operand (boxed, type-preserving). Removal: when no uses +remain, delete the alloc; `removableWhenDead` gains the shaped ops +next to the existing `make_object`/`make_array` own-storage exemption. + +**Semantics note (define vs set).** Sinking a literal assumes its +field initialization is unobservable. Literal keys are define- +semantics per ES; the current runtime's shaped fallback uses setprop- +on-fresh, equivalent for every key the shaped lowering admits +(`__proto__` and computed keys are already excluded). This is the +same judgment the existing `make_object` sinking made; the +differential lane arbitrates. + +**Pass placement.** Inside the existing main fixpoint (round-robin +with inlining/env-replacement), i.e. *before* `optimizeShapeRegions` — +sinking sees per-read diamonds, never merged regions. Clones from +P3.6 specialization get their shot in the post-specialize +`optimizeModule` round. Bisect: `EJS_NO_SHAPED_SINK` (the +`EJS_NO_EIR_OPT` mold). Telemetry: `shape_allocs_sunk` + +`shape_guards_sunk` on the `EIR-opt:` line. + +### S2 — constructor-result sinking (needs a runtime contract; NOT static) + +The bench2 alloc loop is `new Point(i, i+1)` — a `construct` of a +module-local born-shaped ctor. The tempting rewrite (virtualize the +result: field k = argument k, delete the construct) is **unsound as a +static transform**, and the reason deserves recording: + +> Constructor body stores are `[[Set]]` semantics. A setter installed +> on `Point.prototype` — reachable from *any* escaped instance via +> `Object.getPrototypeOf` — must intercept `this.x = x` in every later +> construction. Deleting the store deletes the interception. This is +> exactly why P4.4's born-with-shape kept the stores and guarded the +> batched fill with a runtime `shaped_proto_intercepts` check rather +> than eliding anything. Object literals don't have this problem +> (define semantics), which is why S1 is static and S2 is not. + +Sound path (designed here, sequenced after S1): **epoch-guarded +sinking** — the deopt-free analogue of V8's speculative escape +analysis. The runtime maintains a global accessor epoch +(`_ejs_accessor_epoch`, bumped whenever an accessor property is +installed on any object — defineProperty/defineProperties/ +`__defineGetter__`/`__defineSetter__`/class accessor evaluation — and +on `setPrototypeOf`/`__proto__` writes). A sunk construct site +compiles to: + + %e = epoch_check epoch= ; load+cmp + cond_br %e -> virtual arm (no allocation, fields = args), + slow arm (the original construct) + +The guard is one load + compare against the epoch observed at module +init; the sunk arm saves two allocations, the fill, and the field-read +dispatch. Accessor installation is rare in the corpus (P4.1 census: +builtin-init dominated) but *not absent* — the epoch must be sampled +after builtin/module init, or kept per-shape-lineage. Additional S2 +conditions, all fail-closed: + +- ctor resolves through the P3.6 promoted-`%self`-slot machinery to a + module-local `make_closure` whose function passes the P4.4 fence + *and* whose body is exactly the guarded fill + `return undefined` + (any trailing code declines); +- fill operands are exactly the formals, in order (computed field + values would require real inlining — decline in v1); +- construct-site argument count equals formal count (missing-argument + `undefined` would change the runtime-derived shape); +- result non-escaping under the S1 classifier; +- all-or-nothing per site: partial folding with a surviving construct + is unsound (the surviving execution may be intercepted, diverging + from folded reads). + +S2 touches runtime (epoch maintenance), lowering (epoch_check op or a +call_runtime), and the optimizer; it is its own gated step with its +own differential evidence. Until then `new`-heavy loops keep their +allocations — gc-P2's nursery makes that a bump-pointer + minor-GC +cost rather than a free-list cost, which is the composition the two +plans always intended. + +### S3 — recorded, not scheduled + +- Flow-sensitive field writes on sunk objects (SSA renaming per field; + today any write declines the candidate). +- Partial escapes / materialization points (allocate lazily on the + escaping path only) — subsumes the "options object passed onward + sometimes" pattern. +- `rest_args`/`args_obj` when only indexed or `.length`'d (plans.md + rung 4). +- Cross-function sinking via inlining heuristics beyond the current + single-block IIFE inliner (a multi-block inliner would let S2's + "fill operands are formals" restriction relax to arbitrary ctor + prefixes). + +## Gates + +S1: unit tests (fold + refusal attacks: escaping uses, written +fields, wrong-shape guards, non-number f64 operands folding false, +prototype reads blocking removal, `===` identity, typeof); the +existing suite byte-identical under `EJS_NO_SHAPED_SINK` vs default +for flag-off compiles (shaped ops only exist under --types); types +diff lane 0-divergent; matrix ×7; telemetry counts on the suite +recorded here; probe types-sink1 node-identical incl. EJS_SHAPES=off +and gc-stress. Perf: a shaped-literal kernel (sink-probe2-style) +should reduce to pure arithmetic — verify via `--dump-after eir-opt` +and wall time. + +S2 (when built): everything above plus epoch-bump coverage tests +(accessor installed mid-loop → slow arm taken from that iteration on), +and types-bench2 as the phase bench — target is the alloc() loop at +kern parity (~0.3 s total, from 0.64 s). + +## S1 results (2026-07-25) + +Implementation: `sinkShapedAlloc` in lib/eir/optimize.ts, wired into +the existing `sinkAllocations` under the main fixpoint; guard branches +resolve via `condBrToBr` + `sweepUnreachableBlocks` (now exported from +optimize-guards.ts and swept each fixpoint round); shaped allocs join +the own-storage DCE exemption, and a shaped alloc reaching DCE counts +as the sink completing (`shape_allocs_sunk` / `shape_guards_sunk` on +the `EIR-opt:` stats line). Bisect: `EJS_NO_SHAPED_SINK`. + +The canonical reduction (types-sink2 kernel, `--dump-after eir-opt`): +`f$typed(a) { var o = {a: n, b: n+1}; return o.a + o.b }` compiles to +two `f64_add`s and a return — allocation, guards, boxes, and slot +loads all gone; the raw-join machinery (P3.4/P4.5) carries the folded +operands through the emptied diamond joins. + +Note on repr provability in practice: unit-lowered IR feeds field +values as raw params (never `box_f64`), so guards there resolve to the +generic arm — reads still fold to the same operands and the alloc +still drains; in real compiles the specialized clones box their +formals, guards resolve true, and the raw path folds. Both routes +were pinned by tests. + +Gate evidence: 187 EIR unit tests green (8 new: full sink, escape / +call-operand / write / prototype-read / wrong-shape / hand-built +unprovable-repr refusals, bisect hook); --types diff lane 485 +identical / 0 divergent / 1 N/A over 486 files (including new suite +tests types-sink1/2, node-identical); matrix ×7 green; flag-off +lowering unchanged (shaped ops only exist under --types; the +unreachable-block sweep now also prunes builder-era dead blocks in +flag-off compiles — semantically inert, LLVM dropped them anyway). +types-bench2 unchanged at 0.65 s as predicted (its allocations are the +S2 constructor case); the S1 payoff lands on non-escaping literal +patterns — destructuring returns, options objects — throughout the +suite and the compiler itself. diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index fb480a16..d59d92a1 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -477,7 +477,9 @@ export function collectEIRToplevel( stats.raw_join_params || stats.shape_guards_folded || stats.shape_regions_merged || - stats.shape_numeric_merged + stats.shape_numeric_merged || + stats.shape_allocs_sunk || + stats.shape_guards_sunk ) debug.log( 1, @@ -490,7 +492,9 @@ export function collectEIRToplevel( `${stats.raw_join_params} raw f64 join param(s), ` + `${stats.shape_guards_folded} shape guard(s) folded, ` + `${stats.shape_regions_merged} shape region(s) merged, ` + - `${stats.shape_numeric_merged} shape+numeric region(s) merged` + `${stats.shape_numeric_merged} shape+numeric region(s) merged, ` + + `${stats.shape_allocs_sunk} shaped alloc(s) sunk, ` + + `${stats.shape_guards_sunk} shape guard branch(es) resolved` ); verifyModule(eir_module); diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index acfd53bb..a00146d7 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -147,7 +147,7 @@ function retargetEdge(inst: Inst, targetIndex: number, newBlock: Block, newArgs: // replace a block's cond_br terminator with an unconditional br to // targets[keepIndex] (edge args preserved); the condition goes dead and // DCE sweeps it later -function condBrToBr(fn: Func, block: Block, keepIndex: number): void { +export function condBrToBr(fn: Func, block: Block, keepIndex: number): void { const cbr = block.terminator!; const keep = cbr.targets![keepIndex]!; removePredEdge(keep.block, cbr, keepIndex); @@ -162,7 +162,7 @@ function condBrToBr(fn: Func, block: Block, keepIndex: number): void { // drop blocks no longer reachable from entry and rebuild predEdges so // no stale edges (from deleted blocks) survive -function sweepUnreachableBlocks(fn: Func): boolean { +export function sweepUnreachableBlocks(fn: Func): boolean { const reachable = new Set([fn.entry!]); const stack: Block[] = [fn.entry!]; while (stack.length > 0) { diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 53f8f048..948455f3 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -20,12 +20,14 @@ // explicit normal/unwind targets (may-throw ops inside protected // regions) are block terminators; we neither fold nor remove them. -import { Func, Inst, Module, replaceAllUses } from "./ir"; +import { Func, Inst, Module, ShapeField, replaceAllUses } from "./ir"; import { Effect, opInfo } from "./ops"; import { + condBrToBr, optimizeGuardRegions, optimizeShapeRegions, rawJoinParams, + sweepUnreachableBlocks, threadBooleanJoins, } from "./optimize-guards"; @@ -48,6 +50,10 @@ export interface OptStats { unbox_folds: number; // Phase 3.6: constant edges threaded past boxed-boolean re-tests joins_threaded: number; + // sinking-plan S1: non-escaping make_object_shaped scalar-replaced, + // and the shape guards on them resolved statically + shape_allocs_sunk: number; + shape_guards_sunk: number; } function newStats(): OptStats { @@ -65,6 +71,8 @@ function newStats(): OptStats { shape_numeric_merged: 0, unbox_folds: 0, joins_threaded: 0, + shape_allocs_sunk: 0, + shape_guards_sunk: 0, }; } @@ -277,16 +285,192 @@ function sinkAlloc(useMap: UseMap, fn: Func, alloc: Inst, stats: OptStats): bool return changed; } -function sinkAllocations(useMap: UseMap, fn: Func, stats: OptStats): boolean { +// --- shaped-literal sinking (sinking-plan S1) ------------------------------ +// +// make_object_shaped carries its field values as operands (shape field +// order, boxed) and its shape as an immediate — there are no +// initializing stores. For a non-escaping, never-written shaped +// allocation the birth shape is invariant for the object's whole +// lifetime (nothing else can transition it), so its has_shape guards +// resolve statically and its slot/get reads fold to the operands. +// Guards fold TRUE only when every f64-repr field's operand is provably +// a number (box_f64 or number const) — folding true exposes raw +// slot_loads, and feeding those from a non-number would manufacture +// garbage bits. Folding FALSE is always sound: the diamond's arms are +// twins, and the generic arm's reads fold to the same operands. + +// how a shaped allocation's use participates +interface ShapedAllocUses { + // has_shape guards whose result feeds only their block's cond_br + guards: Inst[]; + // slot_load reads against the birth shape + slotReads: Inst[]; + // get_prop_atom reads (own-field ones fold; others block removal) + atomReads: Inst[]; + // has_shape whose result ALSO flows somewhere else — leaves the + // alloc alive but doesn't escape it + unfoldableGuards: Inst[]; + escapes: boolean; +} + +function classifyShapedUses(useMap: UseMap, alloc: Inst): ShapedAllocUses { + const r: ShapedAllocUses = { + guards: [], + slotReads: [], + atomReads: [], + unfoldableGuards: [], + escapes: false, + }; + for (const use of usesOf(useMap, alloc)) { + const { inst, index } = use; + if (index === -1) { + r.escapes = true; + } else if (inst.op === "has_shape" && index === 0) { + const guardUses = usesOf(useMap, inst); + if ( + guardUses.length === 1 && + guardUses[0]!.inst.op === "cond_br" && + guardUses[0]!.index === 0 && + guardUses[0]!.inst.block === inst.block + ) + r.guards.push(inst); + else r.unfoldableGuards.push(inst); + } else if (inst.op === "slot_load" && index === 0) { + r.slotReads.push(inst); + } else if (inst.op === "get_prop_atom" && index === 0) { + r.atomReads.push(inst); + } else { + // every write (slot_store, set_prop_atom), computed access, + // call/return/throw operand, value position: escape. v1 + // keeps writes out entirely — a write would also invalidate + // the static guard resolution above. + r.escapes = true; + } + } + return r; +} + +// is this operand provably a number (safe to feed a raw f64 slot)? +function provablyNumberOperand(v: Inst): boolean { + return v.op === "box_f64" || (v.op === "const" && v.imms.kind === "number"); +} + +// the raw-f64 replacement for a slot_load of field value `v`, inserted +// before `read` when a fresh const is needed +function rawF64ValueBefore(fn: Func, read: Inst, v: Inst): Inst | null { + if (v.op === "box_f64") return v.operands[0]!; + if (v.op === "const" && v.imms.kind === "number") { + const c = new Inst(fn, "f64_const", [], { value: v.imms.value }); + c.type = "f64"; + const b = read.block!; + c.block = b; + b.insts.splice(b.insts.indexOf(read), 0, c); + return c; + } + return null; +} + +function shapedFieldIndex(fields: readonly ShapeField[], name: string): number { + for (let i = 0; i < fields.length; i++) if (fields[i]!.name === name) return i; + return -1; +} + +// try to scalar-replace one shaped allocation. reads fold immediately; +// guard branches rewrite to their resolved edge (the dead arm and the +// then-unused has_shape are reclaimed by the caller's unreachable-block +// sweep + DCE, and the alloc itself is removed in a later round once +// its use list has drained). +function sinkShapedAlloc( + useMap: UseMap, + fn: Func, + m: Module, + alloc: Inst, + stats: OptStats +): boolean { + const shape = alloc.imms.shape as string; + const fields = m.shapes.get(shape); + if (!fields || fields.length !== alloc.operands.length) return false; + + const uses = classifyShapedUses(useMap, alloc); + if (uses.escapes) return false; + + // guards fold true only when every f64 field's operand is provably + // a number; otherwise the generic arm is the (equally correct) route + const reprsProven = fields.every( + (f, i) => f.repr !== "f64" || provablyNumberOperand(alloc.operands[i]!) + ); + + let changed = false; + + for (const read of uses.slotReads) { + if (read.targets) continue; + if ((read.imms.shape as string) !== shape) continue; // other-shape arm: dies with it + const k = read.imms.slot as number; + if (k < 0 || k >= fields.length) continue; + const v = alloc.operands[k]!; + if ((read.imms.repr as string) === "f64") { + const raw = rawF64ValueBefore(fn, read, v); + if (!raw) continue; // unprovable: the false-folded guard keeps this arm dead + foldRead(useMap, fn, read, raw); + } else { + foldRead(useMap, fn, read, v); + } + stats.reads_folded++; + changed = true; + } + + for (const read of uses.atomReads) { + if (read.targets) continue; + const k = shapedFieldIndex(fields, read.imms.atom as string); + if (k < 0) continue; // prototype read: unfoldable, blocks removal + foldRead(useMap, fn, read, alloc.operands[k]!); + stats.reads_folded++; + changed = true; + } + + for (const guard of uses.guards) { + const block = guard.block!; + const cbr = block.terminator!; + if (cbr.op !== "cond_br") continue; // already rewritten this round + const takeTrue = (guard.imms.shape as string) === shape && reprsProven; + condBrToBr(fn, block, takeTrue ? 0 : 1); + // the cond_br is gone; keep the round's use map accurate + const guardUses = useMap[guard.id]; + if (guardUses) useMap[guard.id] = guardUses.filter((u) => u.inst !== cbr); + stats.shape_guards_sunk++; + changed = true; + } + + // when nothing uses the alloc anymore, it goes now; otherwise the + // next fixpoint round (fresh use map, dead arms swept) finishes + const remaining = usesOf(useMap, alloc).filter((u) => u.inst.block !== null); + if (remaining.length === 0) { + removeInst(useMap, alloc); + stats.shape_allocs_sunk++; + changed = true; + } + return changed; +} + +function sinkAllocations(useMap: UseMap, fn: Func, m: Module | undefined, stats: OptStats): boolean { const candidates: Inst[] = []; + const shaped: Inst[] = []; + const noShaped = !!process.env["EJS_NO_SHAPED_SINK"]; fn.forEachInst((inst) => { if (inst.op === "make_object" || inst.op === "make_array") candidates.push(inst); + else if (inst.op === "make_object_shaped" && !noShaped) shaped.push(inst); }); let changed = false; for (const c of candidates) { if (!c.block) continue; // removed by an earlier candidate's fold if (sinkAlloc(useMap, fn, c, stats)) changed = true; } + if (m) { + for (const c of shaped) { + if (!c.block) continue; + if (sinkShapedAlloc(useMap, fn, m, c, stats)) changed = true; + } + } return changed; } @@ -614,7 +798,8 @@ function foldUnboxOfBox(fn: Func, stats: OptStats): boolean { function removableWhenDead(inst: Inst): boolean { if (inst.op === "blockparam") return false; if (inst.targets && inst.targets.length > 0) return false; - if (inst.op === "make_object" || inst.op === "make_array") return true; + if (inst.op === "make_object" || inst.op === "make_array" || inst.op === "make_object_shaped") + return true; const info = opInfo(inst.op); if (info.terminator) return false; return (info.effects & ~(Effect.READ | Effect.GC)) === 0; @@ -647,6 +832,9 @@ function eliminateDead(fn: Func, stats: OptStats): boolean { if (idx >= 0) b.insts.splice(idx, 1); inst.block = null; stats.dead_removed++; + // a shaped alloc reaching DCE means its reads/guards all folded + // (or it was never consumed) — that IS the sink completing + if (inst.op === "make_object_shaped") stats.shape_allocs_sunk++; changed = true; for (const o of inst.operands) { const n = --counts[o.id]!; @@ -671,7 +859,10 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O const useMap = buildUseMap(fn); if (scalarReplaceEnvs(useMap, fn, s)) changed = true; if (foldIteratorWrappers(useMap, fn, s)) changed = true; - if (sinkAllocations(useMap, fn, s)) changed = true; + if (sinkAllocations(useMap, fn, module, s)) changed = true; + // shaped sinking folds guard branches; reclaim the dead arms so + // the next round's use map lets the alloc itself drain + if (sweepUnreachableBlocks(fn)) changed = true; if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; } diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 58997831..1fac0245 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -2386,6 +2386,8 @@ function shapeOptStats(): OptStats { shape_numeric_merged: 0, unbox_folds: 0, joins_threaded: 0, + shape_allocs_sunk: 0, + shape_guards_sunk: 0, }; } @@ -2992,6 +2994,143 @@ test("born-verify: a boxed value into an f64 slot rejects by type", () => { assertThrows(() => verifyModule(buildConstJoinStore(true)), "raw f64"); }); +// --- sinking-plan S1: shaped-literal sinking ----------------------------------- + +function lowerShapedSink(src: string): { printed: string; stats: OptStats } { + const r = lowerFunctionNode( + parseFn(src), + undefined, + stubShapeOracle({ o: PXY }, { a: ["number"] }) + ); + verifyModule(r.module); + const stats = optimizeFunction(r.fn, r.module); + verifyModule(r.module); + return { printed: printFunction(r.fn), stats }; +} + +test("sink-shaped: a non-escaping guarded literal scalar-replaces completely", () => { + // o's literal is born with PXY's exact shape (a types as number, b is + // boxed); every read folds to an operand, every guard resolves, the + // allocation drains away + const { printed, stats } = lowerShapedSink( + "function f(a, b) { var o = { x: 1, y: a, s: b }; return o.x + o.y + o.s; }" + ); + assert(stats.shape_allocs_sunk === 1, `sunk=${stats.shape_allocs_sunk}`); + assert(stats.shape_guards_sunk >= 1, `guards=${stats.shape_guards_sunk}`); + assertNotContains(printed, "make_object_shaped"); + assertNotContains(printed, "has_shape"); + assertNotContains(printed, "slot_load"); + assertNotContains(printed, "get_prop_atom"); +}); + +test("sink-shaped: an escaping literal is untouched", () => { + const { printed, stats } = lowerShapedSink( + "function f(a, b) { var o = { x: 1, y: a, s: b }; return o; }" + ); + assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); + assertContains(printed, "make_object_shaped"); +}); + +test("sink-shaped: a call-operand use escapes", () => { + const { printed, stats } = lowerShapedSink( + "function f(a, b, g) { var o = { x: 1, y: a, s: b }; g(o); return o.x; }" + ); + assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); + assertContains(printed, "make_object_shaped"); +}); + +test("sink-shaped: a written literal declines wholesale", () => { + // the store lowers to a slot_store/set_prop_atom use of o — v1 treats + // every write as an escape (a write would also invalidate the static + // guard resolution) + const { printed, stats } = lowerShapedSink( + "function f(a, b) { var o = { x: 1, y: a, s: b }; o.x = 2; return o.x; }" + ); + assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); + assertContains(printed, "make_object_shaped"); +}); + +test("sink-shaped: a non-own read blocks removal but own reads still fold", () => { + const { printed, stats } = lowerShapedSink( + "function f(a, b) { var o = { x: 1, y: a, s: b }; return o.x + o.zzz; }" + ); + assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); + assert(stats.reads_folded >= 1, `folded=${stats.reads_folded}`); + assertContains(printed, "make_object_shaped"); + assertContains(printed, 'atom="zzz"'); // the prototype read survives +}); + +test("sink-shaped: shape mismatch resolves guards to the generic arm and still sinks", () => { + // b is untyped, so the literal's y field is born boxed — its interned + // shape differs from PXY, every has_shape(o, PXY) is statically false, + // and the reads fold through the generic arm + const { printed, stats } = lowerShapedSink( + "function f(b, c) { var o = { x: 1, y: b, s: c }; return o.x + o.y; }" + ); + assert(stats.shape_allocs_sunk === 1, `sunk=${stats.shape_allocs_sunk}`); + assertNotContains(printed, "make_object_shaped"); + assertNotContains(printed, "has_shape"); + assertNotContains(printed, "slot_load"); +}); + +// unprovable-repr attack: the shape KEY matches but an f64 field's operand +// is not provably a number (only buildable by hand — lowering derives repr +// and provability from the same predicate). the guard must fold FALSE: +// folding true would feed a raw slot_load from a possibly-non-number. +test("sink-shaped: an unprovable f64 operand folds the guard to the generic arm", () => { + const fb = new FunctionBuilder("unprovable", ["%env", "%this", "v"]); + const v = fb.fn.entry!.params[2]!; + const shapeKey = "x:f64,y:f64"; + const alloc = fb.emit("make_object_shaped", [v, v], { shape: shapeKey }); + const fast = fb.newBlock("fast"); + const slow = fb.newBlock("slow"); + const j = fb.newBlock("j"); + const jp = j.addParam("r"); + const g = fb.emit("has_shape", [alloc], { shape: shapeKey }); + fb.condBr(g, fast, [], slow, []); + fb.sealBlock(fast); + fb.sealBlock(slow); + fb.setInsertPoint(fast); + const l = fb.emit("slot_load", [alloc], { shape: shapeKey, slot: 0, repr: "f64" }); + l.type = "f64"; + fb.br(j, [fb.emit("box_f64", [l], {})]); + fb.setInsertPoint(slow); + fb.br(j, [fb.emit("get_prop_atom", [alloc], { atom: "x" })]); + fb.sealBlock(j); + fb.setInsertPoint(j); + fb.ret(jp); + const fn = fb.finish(); + const mod = new Module("unprovable_mod"); + mod.addFunction(fn); + mod.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + verifyModule(mod); + const stats = optimizeFunction(fn, mod); + verifyModule(mod); + const printed = printFunction(fn); + assert(stats.shape_guards_sunk === 1, `guards=${stats.shape_guards_sunk}`); + assert(stats.shape_allocs_sunk === 1, `sunk=${stats.shape_allocs_sunk}`); + // the raw fast arm must be gone (folding true would have kept it) + assertNotContains(printed, "slot_load"); + assertNotContains(printed, "make_object_shaped"); + assertNotContains(printed, "get_prop_atom"); // generic arm folded to v +}); + +test("sink-shaped: EJS_NO_SHAPED_SINK leaves the allocation alone", () => { + process.env["EJS_NO_SHAPED_SINK"] = "1"; + try { + const { printed, stats } = lowerShapedSink( + "function f(a, b) { var o = { x: 1, y: a, s: b }; return o.x + o.y; }" + ); + assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); + assertContains(printed, "make_object_shaped"); + } finally { + delete process.env["EJS_NO_SHAPED_SINK"]; + } +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/test/expected/types-sink1.js.expected-out b/test/expected/types-sink1.js.expected-out new file mode 100644 index 00000000..ddfd63c4 --- /dev/null +++ b/test/expected/types-sink1.js.expected-out @@ -0,0 +1 @@ +40000000003 diff --git a/test/expected/types-sink2.js.expected-out b/test/expected/types-sink2.js.expected-out new file mode 100644 index 00000000..5caff40c --- /dev/null +++ b/test/expected/types-sink2.js.expected-out @@ -0,0 +1 @@ +10000 diff --git a/test/types-sink1.js b/test/types-sink1.js new file mode 100644 index 00000000..0f110f56 --- /dev/null +++ b/test/types-sink1.js @@ -0,0 +1,12 @@ +function Point(x, y) { this.x = x; this.y = y; } +function alloc(n) { + var s = 0; var i = 0; + while (i < n) { + var p = new Point(i, i + 1); + s = s + p.x + p.y; + i = i + 1; + } + return s; +} +var o = { a: 1, b: 2 }; +console.log(alloc(200000) + o.a + o.b); diff --git a/test/types-sink2.js b/test/types-sink2.js new file mode 100644 index 00000000..ce8075c2 --- /dev/null +++ b/test/types-sink2.js @@ -0,0 +1,7 @@ +function f(n) { + var o = { a: n, b: n + 1 }; + return o.a + o.b; +} +var s = 0; var i = 0; +while (i < 100) { s = s + f(i); i = i + 1; } +console.log(s); From 0e50ae702533abf6645b9951a69a13a1243fa2bd Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 25 Jul 2026 16:22:29 -0700 Subject: [PATCH 116/146] =?UTF-8?q?eir:=20gc-P3=20=E2=80=94=20emitter=20gc?= =?UTF-8?q?-frames:=20precise,=20relocatable=20JS-frame=20roots?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The chained-frame variant. EJSHeapContext grows gc_frame_head (seam word 17; the emitted [12 x i64] view widens to 18); emitted functions whose values are live across a safepoint alloca an EJSGCFrame {prev, count, slots[]}, link it in the prologue, unlink at returns; catch handlers re-link their own record past the unwound callees. Chains are per machine stack: the generator push/pop hooks swap the head exactly like current_stack_end (the caller segment parks on the generator), and the minor walks the live chain, every suspended generator's saved chain, and every active generator's parked caller segment — precise slots evacuate and rewrite. Emitter side: slot DEMOTION rather than spill/reload — a value live across a safepoint (new lib/eir/liveness.ts, backward liveness over the effect table) is stored to its frame slot at its definition and loaded at every use (val() intercepts). Loads are dominated by the def's store, so no SSA-rewrite dominance hazard exists; LLVM CSEs loads between safepoints and cannot forward across one because the frame address escapes through the chain link — the plan's store-to-load-forwarding discipline, structural. Soundness never depends on liveness coverage: a live-across-call SSA value is always callee-saved-register/stack visible, so the conservative scan pins whatever the frames don't cover (v1 skips invoke-form safepoints — try regions stay pinned). Pin-first ordering in the minor is load-bearing: an object visible to both a gc-frame slot and a C frame must not move. env_load/env_store now compute slot addresses inline (payload mask + fixed offset, recomputed per use so a relocated env re-derives) — a runtime call deleted from every env access. Bisects: EJS_NO_GC_FRAMES, EJS_NO_INLINE_ENV_SLOTS. The bug measurement caught: gc-frames are stack allocas, and the conservative stack scan pinned every frame-held value through its own slot — gcframe_moves was ZERO and pins went UP. Minors now skip the scanned stack's frame records (set_frame_skip_chain, merge-cursor; full GC never skips — non-moving, it wants conservative slot visibility). After the fix: 76,174 frame-driven relocations per self-compile (p50 13/minor), pins p50 373 -> 101, ~45% fewer pin events than the P2 baseline. Spill cost: frames ~+1s, env inlining ~-0.4s, net ~+1% wall (42.3s -> 42.7s variant-interleaved). Gate: tiny/gennest/self-compile ladders under EVERY_N_ALLOC=101 and 997 stress + paranoid + verify; probes 8/8 across off/on/stress/ verify; nursery diff lane 485/0/1 (full recompile); --types diff lane 485/0/1; matrix x7 green at 418 tests/stage lane. gcframe_moves on the profile line is the standing movement meter. (Source comments in these files also drop plan-id references — the plans.md restructure landing next normalizes that repo-wide.) Co-Authored-By: Claude Fable 5 --- docs/gc-p3-results.md | 103 +++++++++++++++++++++ lib/compiler.ts | 126 ++++++++++++++++++++++---- lib/eir/emit.ts | 162 ++++++++++++++++++++++++++------- lib/eir/liveness.ts | 120 +++++++++++++++++++++++++ runtime/ejs-gc.c | 194 +++++++++++++++++++++++++++++++--------- runtime/ejs-gc.h | 35 ++++++-- runtime/ejs-generator.c | 10 ++- runtime/ejs-generator.h | 16 +++- 8 files changed, 661 insertions(+), 105 deletions(-) create mode 100644 docs/gc-p3-results.md create mode 100644 lib/eir/liveness.ts diff --git a/docs/gc-p3-results.md b/docs/gc-p3-results.md new file mode 100644 index 00000000..b2b671f7 --- /dev/null +++ b/docs/gc-p3-results.md @@ -0,0 +1,103 @@ +# gc-P3 results: precise JS-frame roots (emitter gc-frames) + +Completed 2026-07-25. The chained-frame variant of gc-plan P3: emitted +functions own their precise root records; frame-held values relocate. + +## What shipped + +- **The chain.** `EJSHeapContext.gc_frame_head` (seam word 17; the + emitted view widened `[12 x i64]` → `[18 x i64]`). An emitted + function whose values are live across a safepoint allocas an + `EJSGCFrame { prev, count, slots[count] }`, links it in its prologue, + unlinks at every return. Catch handlers re-link their own frame (the + unwind discarded every callee record). Chains are **per machine + stack**: the generator push/pop hooks swap the head exactly like + `current_stack_end` (caller segment parks on the generator), and the + minor walks the live chain, every suspended generator's saved chain, + and every active generator's parked caller segment. +- **Slot demotion, not spill/reload.** A value live across a safepoint + is demoted: stored to its frame slot at its definition, and **loaded + at every use** (`val()` intercepts). Every load is dominated by the + def's store, so there is no dominance hazard from rewriting SSA uses + across branches; LLVM CSEs redundant loads between safepoints and + cannot forward across one — the frame address escapes through the + chain link, which is exactly the store-to-load-forwarding discipline + the plan demanded. Slots are undefined-initialized (a stale slot + must parse as an ejsval). +- **Liveness** (`lib/eir/liveness.ts`): standard backward analysis over + EIR; safepoints = target-less ops with GC|CALL effects (`box_f64` + excluded — it never allocates). Deliberately partial, and sound + because of one load-bearing ABI fact: **a live-across-call SSA value + is always in a callee-saved register or a stack slot, so the + conservative scan sees it and pins its referent.** Under-coverage + costs pins, never correctness. v1 skips invoke-form safepoints (try + regions) and values defined by them — those stay pinned. +- **Env slot-address inlining.** `env_load`/`env_store` compute the + slot address inline (payload mask + `+16 + 8*slot`), recomputed per + use from the boxed env value — a relocated env re-derives through its + own slot load. Deletes a runtime call from every env access. + Bisects: `EJS_NO_GC_FRAMES`, `EJS_NO_INLINE_ENV_SLOTS`. +- **Pin-first ordering.** The chain walk runs AFTER the conservative + pin pass, on purpose: an object visible to both a gc-frame slot and a + C frame (an ejsval argument into the very call that triggered the + minor) must not move — `minor_process_slot` leaves pinned targets in + place, so the pin wins and the C copy stays valid. Precise-first + would have been a use-after-move factory. + +## The bug measurement caught + +First profile: `gcframe_moves = 0` across 4256 minors, pins UP 6×. +The gc-frame is a stack alloca — **the conservative stack scan saw +every frame slot and pinned every frame-held value through its own +slot.** Precision existed but could never move anything. + +Fix: during a minor, `mark_ejsvals_in_range` skips the frame records of +the stack it is scanning (`set_frame_skip_chain` — a sorted range list +with a merge cursor, O(1) per word). Each conservative range scan gets +its matching chain: the live head for the current stack, the saved head +for a suspended generator stack, the parked caller segment for each +active generator. Full collections never skip — the old collector +still relies on conservative slot visibility (it doesn't move, so it +doesn't need to rewrite). + +## Numbers (self-compile, arm64, nursery default-on, 1 MB budget) + +- **Movement**: `gcframe_moves` = 76,174 relocations per self-compile + (p50 13/minor, max 101) — the "move-everything" property runs + continuously; under `EJS_GC_EVERY_N_ALLOC=101` stress every + frame-held young value relocates constantly, which is the + store-forwarding trap the gate demanded (green across the ladder). +- **Pins**: p50 373 → **101** per minor (mean 452 → 136) after the + skip fix; ~45% fewer pin events per compile than the P2 baseline. + Residual pins = C-frame-referenced values + stale dead spills — the + set precision cannot touch, as predicted. +- **Spill cost** (variant exes, one self-compile each): P2 baseline + 42.3 s; env-inlining alone 41.9 s; frames alone 43.3 s; both 42.7 s. + Net ≈ **+1% wall** — frames cost ~1 s, env inlining gives back + ~0.4 s. (The plan's "expected small: safepoints are call sites; + calls spill anyway.") + +## Validation + +- tiny ×3 / gennest compile + runs / paranoid / verify, all under + `EJS_GC_EVERY_N_ALLOC=101`; self-compile under stress-997 — green. +- probes (ropes, envwb, gens, gennest, genstress): 8/8 byte-identical + across off / on / stress / stress+verify. +- nursery differential lane (full recompile — gc-frames are in ALL + emitted code): 475 pass / 0 fail / 1 n-a. +- --types differential lane: 485 identical / 0 divergent / 1 n-a. +- matrix ×7 green. + +## Deferred (recorded) + +- Invoke-form safepoints (try regions) and their results stay + conservatively pinned; covering them needs reload placement on the + normal edge (single-pred case is easy; shared continuations need + edge splitting). +- Slot liveness is per-value, not interval-packed; frame sizes are + small in practice. +- Return-address-keyed stackmaps (the zero-entry-cost upgrade) remain + the measured-later variant; chain maintenance cost is within noise. +- Dead-slot floating garbage: a slot keeps its last value alive until + the frame pops (bounded by frame size; undefined-init bounds it at + function entry). diff --git a/lib/compiler.ts b/lib/compiler.ts index a2ad0053..628852c0 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -49,7 +49,7 @@ class LLVMIRVisitor implements VisitorSurface { ejs_globals: Record; ejs_symbols: Record; module_atoms: Map; - // shapes-plan P4.3: the module's interned guard shapes (imms.shape key + // the module's interned guard shapes (imms.shape key // -> the i32 shape-index global + its ordered fields), filled by the // EIR emitter's has_shape lowering and flushed into the literal-init // function by emitShapeInterns (the atom-table precedent) @@ -73,7 +73,7 @@ class LLVMIRVisitor implements VisitorSurface { eir_emitter?: EIREmitter; eir_emitted?: Map>; eir_toplevel_fns!: Map; - // shapes-plan P4.3: the shape-intern init function (null when the + // the shape-intern init function (null when the // module guards no shapes), built by emitShapeInterns and called by // emitModuleResolution after literal initialization shape_init_function: llvm.EjsFunction | null = null; @@ -226,7 +226,7 @@ class LLVMIRVisitor implements VisitorSurface { "" ); - // shapes-plan P4.3: intern this module's guard shapes right after + // intern this module's guard shapes right after // the atoms they name are initialized if (this.shape_init_function) ir.createCall(this.shape_init_function.type, this.shape_init_function, [], ""); @@ -666,7 +666,7 @@ class LLVMIRVisitor implements VisitorSurface { } } - // shapes-plan P4.3 target-layout helpers (beside isNumber so all + // shape-guard target-layout helpers (beside isNumber so all // NaN-box knowledge stays in one place) // EJSVAL_IS_OBJECT: object is the topmost shifted tag, so on 64-bit a @@ -698,8 +698,8 @@ class LLVMIRVisitor implements VisitorSurface { return ir.createIntToPtr(payload, types.EjsObject.pointerTo(), "objptr"); } - // gc-plan P2: is this value's payload inside the nursery? The seam - // contract (ejs-gc.h EJSHeapContext) fixes the layout: 12 i64 words — + // is this value's payload inside the nursery? The seam + // contract (ejs-gc.h EJSHeapContext) fixes the layout: 18 i64 words — // bump[5], limit[5], nursery_base (word 10), nursery_end (word 11). // A double's payload can false-positive into the range; the out-of- // line barrier re-filters, so the inline check only needs to be @@ -710,14 +710,14 @@ class LLVMIRVisitor implements VisitorSurface { if (!this.heap_ctx_global) this.heap_ctx_global = new llvm.GlobalVariable( this.module, - llvm.ArrayType.get(types.Int64, 12), + llvm.ArrayType.get(types.Int64, 18), "_ejs_heap", null, true ); return this.heap_ctx_global; } - // gc-plan P2c: the inline nursery allocation for closure + // the inline nursery allocation for closure // environments — bump, compare, init header/length/slots, box with // the CLOSUREENV tag; the slow thunk (the existing runtime call) is // the safepoint. With the nursery off, bump/limit are NULL and the @@ -733,7 +733,7 @@ class LLVMIRVisitor implements VisitorSurface { const idx = Math.log2(cell_size) - 4; // seam word: bump[idx], limit[5+idx] const g = this.heapContextGlobal(); - const arr_ty = llvm.ArrayType.get(types.Int64, 12); + const arr_ty = llvm.ArrayType.get(types.Int64, 18); const bump_p = ir.createInBoundsGetElementPointer( arr_ty, g, [consts.int64(0), consts.int32(idx)], "env_bump_p"); const limit_p = ir.createInBoundsGetElementPointer( @@ -800,7 +800,7 @@ class LLVMIRVisitor implements VisitorSurface { if (this.triple.pointerSize() !== 64) throw new Error("emitYoungCheck not implemented for 32-bit targets"); const g = this.heapContextGlobal(); - const arr_ty = llvm.ArrayType.get(types.Int64, 12); + const arr_ty = llvm.ArrayType.get(types.Int64, 18); const base_p = ir.createInBoundsGetElementPointer( arr_ty, g, [consts.int64(0), consts.int32(10)], "nursery_base_p"); const base = ir.createLoad(types.Int64, base_p, "nursery_base"); @@ -817,6 +817,94 @@ class LLVMIRVisitor implements VisitorSurface { return ir.createAnd(ge, lt, "wb_young"); } + // the gc-frame chain head is word 17 of the seam + // (EJSHeapContext.gc_frame_head — bump[5], limit[5], nursery + // bounds, remset words, current_stack_end, priv precede it) + gcFrameHeadPtr(): llvm.Value { + const g = this.heapContextGlobal(); + const arr_ty = llvm.ArrayType.get(types.Int64, 18); + return ir.createInBoundsGetElementPointer( + arr_ty, g, [consts.int64(0), consts.int32(17)], "gc_frame_head_p"); + } + + // link an emitted function's gc-frame record: { prev, count, + // slots[count] } laid out as i64 words in `frame` (an alloca). + // Every slot is initialized to undefined — a stale slot must still + // parse as a valid ejsval when the collector walks it. Linking the + // frame's address into the exported seam is also what makes the + // alloca ESCAPE: LLVM can no longer forward pre-call slot stores to + // post-call reloads across any external call (the + // store-to-load-forwarding hazard the gc plan names). + emitGCFrameLink(frame: llvm.Value, nslots: number, undef: llvm.Value): void { + const i8 = llvm.Type.getInt8Ty(); + const base = ir.createBitCast(frame, i8.pointerTo(), "gcf_base"); + const headp = this.gcFrameHeadPtr(); + const prev = ir.createLoad(types.Int64, headp, "gcf_prev"); + const prev_p = ir.createBitCast(base, types.Int64.pointerTo(), "gcf_prev_p"); + ir.createStore(prev, prev_p); + const count_p = ir.createBitCast( + ir.createInBoundsGetElementPointer(i8, base, [consts.int64(8)], "gcf_count_addr"), + types.Int64.pointerTo(), "gcf_count_p"); + ir.createStore(consts.int64(nslots), count_p); + for (let i = 0; i < nslots; i++) { + const slot_p = ir.createBitCast( + ir.createInBoundsGetElementPointer( + i8, base, [consts.int64(16 + 8 * i)], `gcf_slot${i}_addr`), + types.EjsValue.pointerTo(), `gcf_slot${i}_p`); + ir.createStore(undef, slot_p); + } + ir.createStore(ir.createPtrToInt(base, types.Int64, "gcf_addr"), headp); + } + + // epilogue: pop this frame off the chain + emitGCFrameUnlink(frame: llvm.Value): void { + const i8 = llvm.Type.getInt8Ty(); + const base = ir.createBitCast(frame, i8.pointerTo(), "gcf_base"); + const prev_p = ir.createBitCast(base, types.Int64.pointerTo(), "gcf_prev_p"); + const prev = ir.createLoad(types.Int64, prev_p, "gcf_prev"); + ir.createStore(prev, this.gcFrameHeadPtr()); + } + + // catch handler: the unwind discarded every callee frame below us — + // re-link our own record as the head + emitGCFrameRelink(frame: llvm.Value): void { + const i8 = llvm.Type.getInt8Ty(); + const base = ir.createBitCast(frame, i8.pointerTo(), "gcf_base"); + ir.createStore( + ir.createPtrToInt(base, types.Int64, "gcf_addr"), this.gcFrameHeadPtr()); + } + + // the address of gc-frame slot i, as an EjsValue* + gcFrameSlotPtr(frame: llvm.Value, i: number): llvm.Value { + const i8 = llvm.Type.getInt8Ty(); + const base = ir.createBitCast(frame, i8.pointerTo(), "gcf_base"); + return ir.createBitCast( + ir.createInBoundsGetElementPointer( + i8, base, [consts.int64(16 + 8 * i)], `gcf_slot${i}_addr`), + types.EjsValue.pointerTo(), `gcf_slot${i}_p`); + } + + // inline closure-env slot addressing — payload mask + + // byte offset (EJSClosureEnv: u64 header, u32 length(+pad), slots + // at +16). Recomputed PER USE from the boxed env value, never + // cached across a safepoint: when the env value itself lives in a + // gc-frame slot, the post-safepoint reload feeds a fresh address + // computation, so a relocated env re-derives correctly. Replaces a + // runtime call per env access. + emitEnvSlotRef(env: llvm.Value, slot: number): llvm.Value { + const i8 = llvm.Type.getInt8Ty(); + const payload = ir.createAnd( + this.getEjsvalBits(env), + consts.int64_lowhi(0x00007fff, 0xffffffff), + "env_payload" + ); + const base = ir.createIntToPtr(payload, i8.pointerTo(), "env_base"); + return ir.createBitCast( + ir.createInBoundsGetElementPointer( + i8, base, [consts.int64(16 + 8 * slot)], "env_slot_addr"), + types.EjsValue.pointerTo(), "env_slot_p"); + } + // the module's i32 shape-index global for `key`, minted on first use // (initialized to EJS_SHAPE_NOMATCH so a guard can never pass before // module init interns the real index) @@ -956,11 +1044,11 @@ export function compile( // pipelines see their %-intrinsic output tree = pre_eir_convert(tree, module_filename, module_infos, options); - // --types (MAAM, docs/maam-plan.md): type analysis over the desugared + // --types (the MAAM oracle): type analysis over the desugared // toplevel. Must run before collectEIRToplevel, which consumes (and // then empties) the toplevel body. Logs stats (and, for --types-dump, // per-binding types); the returned TypeOracle is not consumed by - // codegen yet (Phase 3); never fails the compile. + // codegen unless --types feeds the oracle onward; never fails the compile. let type_oracle = null; if (options.types || options.types_dump) type_oracle = runTypeAnalysisProbe(tree, source_filename, options.types_dump); @@ -976,10 +1064,10 @@ export function compile( type_oracle ); if (lowered.error) throw new Error(`${source_filename}: ${lowered.error}`); - // Phase 3 telemetry: how many guarded diamonds lowering emitted, and + // telemetry: how many guarded diamonds lowering emitted, and // whether any oracle query missed (the node-identity canary) if (type_oracle) { - // shapes-plan P4.3 telemetry (criterion 5, visible degradation): + // shape-guard telemetry (visible degradation): // counted decline reasons, additive-only on the scraped line const declined = lowered.shape_declined ?? {}; const declineStr = Object.keys(declined) @@ -989,7 +1077,7 @@ export function compile( console.warn( `--types: ${source_filename}: diamonds=${lowered.diamonds ?? 0} ` + `oracleQueries=${type_oracle.stats.queries} oracleUnknown=${type_oracle.stats.unknown}` + - // Phase 3.6 telemetry, present only when specialization ran + // specialization telemetry, present only when it ran (lowered.spec ? ` specialized=${lowered.spec.specialized} specSites=${lowered.spec.sites}` + ` specRejected=${lowered.spec.rejected}` @@ -997,17 +1085,17 @@ export function compile( // shape telemetry, present only when sites were consulted ((lowered.shape_sites ?? 0) > 0 ? ` shapeSites=${lowered.shape_sites} shapeGuards=${lowered.shape_guards ?? 0}` + - // shapes-plan P4.6: poly-chain telemetry (additive) + // poly-chain telemetry (additive) ((lowered.shape_poly_guards ?? 0) > 0 ? ` shapePolyGuards=${lowered.shape_poly_guards}` : "") + ` shapeDeclined=${declineStr || "none"}` : "") + - // shapes-plan P4.5: typed slot telemetry (additive) + // typed slot telemetry (additive) ((lowered.typed_loads ?? 0) > 0 || (lowered.typed_stores ?? 0) > 0 ? ` shapeTyped=loads:${lowered.typed_loads ?? 0},stores:${lowered.typed_stores ?? 0}` : "") + - // shapes-plan P4.4: born-with-shape telemetry (additive) + // born-with-shape telemetry (additive) ((lowered.born_shaped ?? 0) > 0 || (lowered.ctor_fills ?? 0) > 0 ? ` bornShaped=${lowered.born_shaped ?? 0} ctorFills=${lowered.ctor_fills ?? 0}` : "") + @@ -1084,7 +1172,7 @@ export function compile( visitor.emitEIRToplevel(toplevel_node); // every has_shape has been emitted by now; flush the module's shape - // interns into their init function (shapes-plan P4.3) — + // interns into their init function — // emitModuleResolution calls it after literal initialization visitor.shape_init_function = visitor.emitShapeInterns(); diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index fc43da56..23fc43de 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -20,6 +20,7 @@ import * as consts from "../consts"; import type { ABI } from "../abi"; import type { RuntimeInterface } from "../runtime"; import type { Module as EIRModule, Func, Block, Inst, Target } from "./ir"; +import { computeSpilledValues } from "./liveness"; const ir = llvm.IRBuilder; @@ -39,17 +40,24 @@ export interface VisitorSurface { // compiler.ts so all target-layout knowledge stays in one place) unboxDouble(val: llvm.Value): llvm.Value; boxDouble(dbl: llvm.Value): llvm.Value; - // shapes-plan P4.3 (beside isNumber for the same reason): the object + // shape-guard NaN-box tests (beside isNumber for the same reason): the object // tag test, the payload->EJSObject* reinterpretation (valid only under // a passed isObject), and the module's interned shape-index global isObject(val: llvm.Value): llvm.Value; objectPointer(val: llvm.Value): llvm.Value; - // gc-plan P2: the inline half of the write barrier — "is this + // the inline half of the write barrier — "is this // value's payload in the nursery range" (layout knowledge lives in // compiler.ts with the other NaN-box tests) emitYoungCheck(val: llvm.Value): llvm.Value; - // gc-plan P2c: inline nursery bump allocation for closure envs + // inline nursery bump allocation for closure envs emitEnvAllocInline(n: number, slowCall: () => llvm.Value): llvm.Value; + // the gc-frame record (precise relocatable JS roots) and + // inline env slot addressing (all layout knowledge in compiler.ts) + emitGCFrameLink(frame: llvm.Value, nslots: number, undef: llvm.Value): void; + emitGCFrameUnlink(frame: llvm.Value): void; + emitGCFrameRelink(frame: llvm.Value): void; + gcFrameSlotPtr(frame: llvm.Value, i: number): llvm.Value; + emitEnvSlotRef(env: llvm.Value, slot: number): llvm.Value; moduleShapeGlobal( key: string, fields: { name: string; repr: string }[] @@ -141,12 +149,20 @@ export class EIREmitter { fn_this_ptr!: llvm.Value; fn_new_target!: llvm.Value; scratch: llvm.AllocaInst | null = null; - // gc-P2: the slot-array env loaded by the most recent slotRef — + // the slot-array env loaded by the most recent slotRef — // shaped stores must remember the ENV (the storage owner), not the // object whose Scan only holds the env reference last_slots_val: llvm.Value | null = null; scratch_type: llvm.Type | null = null; this_slot!: llvm.AllocaInst; + // values live across a safepoint are DEMOTED to + // gc-frame slots — stored once where they're defined, LOADED at + // every use (val() intercepts). Every load is dominated by its + // def's store; LLVM CSEs redundant loads between safepoints but + // cannot forward across one (the frame escapes via the chain), so a + // collector rewrite is always observed. + gc_frame: llvm.AllocaInst | null = null; + gc_frame_slots: Map | null = null; constructor(visitor: VisitorSurface & { abi: ABI; module: llvm.Module }) { this.v = visitor; @@ -167,7 +183,7 @@ export class EIREmitter { let llvm_name = `_ejs_eir_${fn.name.replace(/[^A-Za-z0-9_]/g, "_")}_${mangle_gen++}`; let llvm_fn; if (fn.sig) { - // Phase 3.6 specialized clone: a native unboxed signature + // specialized clone: a native unboxed signature // — (double...) -> double — instead of the runtime's boxed // (env, this*, argc, argv*, newTarget) convention. The // specialization post-checks guarantee the clone touches @@ -223,7 +239,7 @@ export class EIREmitter { llvmFn.literalAllocas = Object.create(null); const args = llvmFn.args; - // Phase 3.6 clones have no env/this*/argc/argv*/newTarget — their + // specialized clones have no env/this*/argc/argv*/newTarget — their // llvm args are the formals alone; the specialization pass // guarantees no op that needs the frame values survives (frame // ops, env/this uses, and generic returns all discard a clone) @@ -251,6 +267,24 @@ export class EIREmitter { this.this_slot = ir.createAlloca(types.EjsValue, "this_slot"); this.this_slot.setAlignment(8); + // values live across safepoints get frame slots + this.gc_frame = null; + this.gc_frame_slots = null; + if (!process.env["EJS_NO_GC_FRAMES"]) { + const spilled = computeSpilledValues(eirFn); + if (spilled) { + const slots = new Map(); + let i = 0; + for (const v of spilled) slots.set(v, i++); + this.gc_frame_slots = slots; + this.gc_frame = ir.createAlloca( + llvm.ArrayType.get(types.Int64, 2 + slots.size), + "gc_frame" + ); + this.gc_frame.setAlignment(8); + } + } + // emit blocks in reverse postorder: a def's block always precedes // its uses' blocks (dominators come first in any RPO), so the // values map is filled before it's read. block *creation* order in @@ -271,7 +305,7 @@ export class EIREmitter { ir.setInsertPoint(this.blocks.get(b)!); for (let p of b.params) { if (p.isException) continue; // materialized by the landingpad below - // rawJoin params (Phase 3.4 pass (b)) carry raw doubles; + // rawJoin params (the raw-join pass) carry raw doubles; // everything else is an EjsValue phi (the P2 boxed rule) let phi_type = p.type === "f64" ? types.Double : types.EjsValue; let phi = ir.createPhi(phi_type, b.predEdges.length, `p_${p.id}`); @@ -287,6 +321,10 @@ export class EIREmitter { // initializing stores to it whenever a literal is first used. let prologue_bb = new llvm.BasicBlock("prologue", llvmFn); ir.setInsertPoint(prologue_bb); + // link the frame before anything can allocate; slots + // start as undefined so a pre-def walk sees valid ejsvals + if (this.gc_frame) + this.v.emitGCFrameLink(this.gc_frame, this.gc_frame_slots!.size, this.undef()); const entry_params = eirFn.entry!.params; // params[0] = %env, params[1] = %this, rest are JS formals if (eirFn.sig) { @@ -305,6 +343,10 @@ export class EIREmitter { for (let i = 2; i < entry_params.length; i++) this.values.set(entry_params[i]!, this.emitArgLoad(argc, args_ptr, i - 2)); } + // demote slotted entry params (their canonical home is + // the frame slot from here on; val() loads it per use) + if (this.gc_frame_slots) + for (const p of entry_params) this.demoteToSlot(p); // remember where the prologue ended; the branch into the eir entry // block is emitted *after* the body, because the legacy cached- // literal helpers append their initializing stores to the end of @@ -314,7 +356,19 @@ export class EIREmitter { // emit every block's instructions for (let b of order) { ir.setInsertPoint(this.blocks.get(b)!); - for (let inst of b.insts) this.emitInst(inst); + // slotted block params store to their frame slot at + // block entry (after the phis, which the block-creation pass + // already registered) + if (this.gc_frame_slots && b !== eirFn.entry) + for (const p of b.params) this.demoteToSlot(p); + for (let inst of b.insts) { + this.emitInst(inst); + // a slotted def's store follows immediately + // (slotted values are never targets-carrying, so the + // block is not yet terminated here) + if (this.gc_frame_slots && this.gc_frame_slots.has(inst)) + this.demoteToSlot(inst); + } } ir.setInsertPoint(prologue_end); @@ -369,6 +423,20 @@ export class EIREmitter { const exc_param = eirBlock.params[0]!; this.values.set(exc_param, val); + + // the unwind discarded every callee frame below this one — + // re-link our record as the chain head + if (this.gc_frame) this.v.emitGCFrameRelink(this.gc_frame); + } + + // if `v` has a frame slot, store its current llvm value there + // (its canonical home; val() loads it per use from now on) + demoteToSlot(v: Inst): void { + const slot = this.gc_frame_slots ? this.gc_frame_slots.get(v) : undefined; + if (slot === undefined) return; + const cur = this.values.get(v); + if (cur === undefined) return; // unbound (e.g. clone %env/%this) + ir.createStore(cur, this.v.gcFrameSlotPtr(this.gc_frame!, slot)); } maxOutgoingArgs(eirFn: Func): number { @@ -399,6 +467,19 @@ export class EIREmitter { // --- helpers ------------------------------------------------------------------- val(operand: Inst | null | undefined): llvm.Value { + // a slotted value's canonical home is its gc-frame slot — + // load per use, so a post-safepoint use observes any collector + // rewrite. Loads between safepoints CSE under LLVM; loads + // across one cannot (the frame escapes via the chain). + if (operand && this.gc_frame_slots) { + const slot = this.gc_frame_slots.get(operand); + if (slot !== undefined) + return ir.createLoad( + types.EjsValue, + this.v.gcFrameSlotPtr(this.gc_frame!, slot), + `gcf_v${operand.id}` + ); + } const v = operand ? this.values.get(operand) : undefined; if (v === undefined) throw new Error( @@ -415,7 +496,7 @@ export class EIREmitter { return this.abi.createCall(this.llvmFn, callee.type, callee, argv, name || ""); } - // gc-plan P2: the emitted generational write barrier (object- + // the emitted generational write barrier (object- // remembering). Inline: one range check on the stored VALUE; slow: // _ejs_gc_remember_val(owner, value) marks the owner dirty. With // the nursery disabled the bounds are zero and the branch is never @@ -432,9 +513,9 @@ export class EIREmitter { ir.setInsertPoint(cont_bb); } - // shapes-plan P4.3: THE slot-addressing seam. A shaped object's + // THE slot-addressing seam. A shaped object's // property storage is a closureenv slot array hanging off the - // map/slots union word (P4.2 layout); when gc-P5 moves slots inline, + // map/slots union word; when the GC work moves slots inline, // only this method changes (the ops carry slot indices, not // addresses). Only valid downstream of a passed has_shape on `objval` // for a shape with more than `slot` fields — which the EIR verifier @@ -455,7 +536,7 @@ export class EIREmitter { "slots_ejsval_ptr" ); const slotsval = ir.createLoad(types.EjsValue, slots_ptr, "slots_ejsval"); - this.last_slots_val = slotsval; // gc-P2: the barrier's true owner + this.last_slots_val = slotsval; // the barrier's true owner // payload-mask the closureenv ejsval to its EJSClosureEnv* const envptr = ir.createPointerCast( this.v.objectPointer(slotsval), @@ -594,7 +675,7 @@ export class EIREmitter { return; } - // --- the typed low tier (Phase 2) --------------------------- + // --- the typed low tier --------------------------- // has_tag/unbox/box mirror LLVMIRVisitor's NaN-boxing helpers; // the f64_* ops are plain LLVM float arithmetic. has_tag and // f64_lt produce machine i1 (consumed by cond_br, like @@ -608,7 +689,7 @@ export class EIREmitter { return; } - // --- shapes (shapes-plan P4.3) ------------------------------- + // --- shapes ------------------------------- // has_shape folds the NaN-box object check into the header // shape-index compare, the way isNumber backs has_tag: a // non-object is simply false. The shape-index global holds @@ -651,7 +732,7 @@ export class EIREmitter { this.values.set(inst, phi); return; } - // P4.5 typed slots: an f64-repr slot is accessed as a raw + // typed slots: an f64-repr slot is accessed as a raw // double — same address, same 8 bytes (the NaN-box stores // doubles raw), just loaded/stored as the machine type the // guard's repr proof licenses. @@ -668,7 +749,7 @@ export class EIREmitter { case "slot_store": { const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); if (inst.imms["repr"] === "f64") { - // raw doubles are not references: no barrier (gc-P2) + // raw doubles are not references: no barrier const dref = ir.createBitCast(ref, types.Double.pointerTo(), "slot_f64_ptr"); ir.createStore(this.val(inst.operands[1]), dref); } else { @@ -678,7 +759,7 @@ export class EIREmitter { this.values.set(inst, this.val(inst.operands[1])); return; } - // born with their shape (shapes-plan P4.4): spill the field + // born with their shape: spill the field // names (atom loads) and initial values contiguously into the // scratch area — names at [0..n), values at [n..2n) — and make // one runtime call. The runtime re-derives the true shape from @@ -847,7 +928,7 @@ export class EIREmitter { case "make_env": { const n = inst.imms["size"] as number; - // gc-plan P2c: envs are 39% of all allocations (the P0 + // envs are 39% of all allocations (the P0 // census) — bump-allocate inline; the runtime call is // the slow path/safepoint. EJS_NO_INLINE_ALLOC=1 is // the compile-time bisect hook. @@ -859,20 +940,34 @@ export class EIREmitter { return; } case "env_load": { - let ref = this.call( - rt.get_env_slot_ref, - [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], - "slotref" - ); + // inline slot addressing, recomputed per use + // from the boxed env (a relocated env re-derives) — + // deletes a runtime call per access. EJS_NO_INLINE_ENV_SLOTS + // restores the runtime-call path. + let ref = process.env["EJS_NO_INLINE_ENV_SLOTS"] + ? this.call( + rt.get_env_slot_ref, + [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], + "slotref" + ) + : this.v.emitEnvSlotRef( + this.val(inst.operands[0]), + inst.imms["slot"] as number + ); this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot")); return; } case "env_store": { - let ref = this.call( - rt.get_env_slot_ref, - [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], - "slotref" - ); + let ref = process.env["EJS_NO_INLINE_ENV_SLOTS"] + ? this.call( + rt.get_env_slot_ref, + [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], + "slotref" + ) + : this.v.emitEnvSlotRef( + this.val(inst.operands[0]), + inst.imms["slot"] as number + ); ir.createStore(this.val(inst.operands[1]), ref); this.emitStoreBarrier(this.val(inst.operands[0]), this.val(inst.operands[1])); this.values.set(inst, this.val(inst.operands[1])); @@ -928,7 +1023,7 @@ export class EIREmitter { ); } case "call_typed": { - // Phase 3.6: direct call to a specialized clone — args are + // direct call to a specialized clone — args are // raw machine values in registers, no scratch spill, no // closure dispatch. Operand 0 (the EIR-level env slot) is // NOT passed: clone signatures carry the formals alone @@ -1120,12 +1215,15 @@ export class EIREmitter { return; } case "return": { + // the return value is read BEFORE the unlink (it + // may itself load from a frame slot); then pop the frame + const rv = this.val(inst.operands[0]); + if (this.gc_frame) this.v.emitGCFrameUnlink(this.gc_frame); // an f64-result clone returns the raw double directly (a // plain scalar return needs none of the ABI's ejsval // struct-return handling) - if (this.eirFn.sig && this.eirFn.sig.result === "f64") - ir.createRet(this.val(inst.operands[0])); - else this.abi.createRet(this.llvmFn, this.val(inst.operands[0])); + if (this.eirFn.sig && this.eirFn.sig.result === "f64") ir.createRet(rv); + else this.abi.createRet(this.llvmFn, rv); return; } case "throw": { diff --git a/lib/eir/liveness.ts b/lib/eir/liveness.ts new file mode 100644 index 00000000..c07d7f2d --- /dev/null +++ b/lib/eir/liveness.ts @@ -0,0 +1,120 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// which values must live in gc-frame slots? +// +// A value needs a precise, relocatable home iff it is LIVE ACROSS a +// safepoint — an op that lowers to a runtime call that may allocate +// (and therefore may run a minor collection that MOVES young objects). +// Values not live across any safepoint never coexist with a move; raw +// f64/i1 values are not references; consts rematerialize from statics. +// +// Soundness does not depend on this analysis being complete: any value +// left out keeps its SSA home, and a live-across-call SSA value is +// always visible to the conservative stack/register scan (ABI: it must +// be in a callee-saved register or a stack slot), which PINS its +// referent. Under-coverage costs pins, never correctness. That is +// also why v1 deliberately skips two classes: +// - ops with unwind targets (invoke form, try regions): their reload +// point is the normal edge, which may be shared — skipped values +// stay pinned; +// - values DEFINED by target-carrying ops: their def-site store has +// no natural insertion point in the defining block. + +import { Func, Inst } from "./ir"; +import { Effect, opInfo } from "./ops"; + +// a v1 safepoint: a target-less op whose lowering calls into the +// runtime with allocation possible. box_f64 carries GC in the effect +// table but emits pure bit arithmetic — never a safepoint. make_env +// counts even with the inline fast path: its slow path is the +// canonical safepoint, and covering both arms is correct (the fast +// path's reload folds back to the store). +export function isSafepoint(inst: Inst): boolean { + if (inst.targets && inst.targets.length > 0) return false; + if (inst.op === "box_f64") return false; + const info = opInfo(inst.op); + if (info.terminator) return false; + return (info.effects & (Effect.GC | Effect.CALL)) !== 0; +} + +function spillable(v: Inst): boolean { + if (v.type !== "any") return false; // raw f64/i1: not references + if (v.op === "const") return false; // rematerializes from statics + if (v.targets && v.targets.length > 0) return false; // invoke results stay pinned + return true; +} + +function usesOf(inst: Inst, fn: (v: Inst) => void): void { + for (const o of inst.operands) fn(o); + if (inst.targets) for (const t of inst.targets) for (const a of t.args) if (a) fn(a); +} + +// the set of values live across at least one safepoint, or null when +// the function needs no gc-frame +export function computeSpilledValues(fn: Func): Set | null { + let anySafepoint = false; + fn.forEachInst((inst) => { + if (isSafepoint(inst)) anySafepoint = true; + }); + if (!anySafepoint) return null; + + // backward liveness to fixpoint. sets keyed by inst; block liveOut + // maps kept in an array parallel to fn.blocks. + const liveIn = new Map>(); + const liveOut = new Map>(); + for (const b of fn.blocks) { + liveIn.set(b, new Set()); + liveOut.set(b, new Set()); + } + + let changed = true; + while (changed) { + changed = false; + // reverse block order is a decent schedule for backward flow + for (let bi = fn.blocks.length - 1; bi >= 0; bi--) { + const b = fn.blocks[bi]!; + const out = liveOut.get(b)!; + const before = out.size; + const term = b.terminator; + if (term && term.targets) { + for (const t of term.targets) { + const sIn = liveIn.get(t.block); + if (!sIn) continue; + for (const v of sIn) out.add(v); + // successor params are defs there, not live into us + for (const p of t.block.params) out.delete(p); + } + } + if (out.size !== before) changed = true; + + const live = new Set(out); + for (let i = b.insts.length - 1; i >= 0; i--) { + const inst = b.insts[i]!; + live.delete(inst); + usesOf(inst, (v) => live.add(v)); + } + const inSet = liveIn.get(b)!; + const inBefore = inSet.size; + for (const v of live) inSet.add(v); + if (inSet.size !== inBefore) changed = true; + } + } + + // record: for each safepoint, everything live just after it + const spilled = new Set(); + for (const b of fn.blocks) { + const live = new Set(liveOut.get(b)!); + for (let i = b.insts.length - 1; i >= 0; i--) { + const inst = b.insts[i]!; + // `live` here = live-after-inst + if (isSafepoint(inst)) { + for (const v of live) if (v !== inst && spillable(v)) spilled.add(v); + } + live.delete(inst); + usesOf(inst, (v) => live.add(v)); + } + } + return spilled.size > 0 ? spilled : null; +} diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 23cc2106..8b86936d 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -274,7 +274,7 @@ typedef struct _Arena { void* pages[ARENA_PAGES]; PageInfo* page_infos[ARENA_PAGES]; int num_pages; - // gc-plan P2: the nursery is a dedicated arena so "is young" is a + // the nursery is a dedicated arena so "is young" is a // range check; old-gen page allocation skips nursery arenas EJSBool is_nursery; } Arena; @@ -367,7 +367,7 @@ struct _PageInfo { int32_t cell_size; int16_t num_cells; int16_t num_free_cells; - // gc-plan P2: 0 = old gen; 1 = active young page (bump-allocated, + // 0 = old gen; 1 = active young page (bump-allocated, // allocated-ness = below bump); 2 = young survivor page (holds // pinned young objects, bitmap-authoritative, no further bumping) uint8_t young; @@ -387,14 +387,14 @@ struct _LargeObjectInfo { static EJSList heap_pages[HEAP_PAGELISTS_COUNT]; static LargeObjectInfo *los_list; -// gc-plan P0 instrumentation state (definitions live with the profile +// GC profiling instrumentation state (definitions live with the profile // block further down, before the mark helpers use them) static EJSBool gc_profile; static struct timeval prof_start_tv; static void profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw); static void profile_report_shutdown(void); -// gc-plan P2 nursery state + hooks (definitions in the nursery block +// nursery state + hooks (definitions in the nursery block // below; declared here because the shared mark helpers dispatch on // minor-collection mode) static EJSBool nursery_enabled; @@ -609,7 +609,7 @@ find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) return page; } - // check if it's in the LOS. Interior pointers match too (gc-plan + // check if it's in the LOS. Interior pointers match too (a // P0): a conservative reference may be a derived pointer whose base // value the optimizer discarded — with an exact-base match a large // object referenced ONLY through an interior pointer (e.g. a flat @@ -682,7 +682,7 @@ alloc_new_page(size_t cell_size) SPEW(2, _ejs_log ("allocating new page for cell size %zd\n", cell_size)); PageInfo *rv = NULL; for (int i = 0; i < num_arenas; i ++) { - // gc-P2: nursery arenas serve young allocation only + // nursery arenas serve young allocation only if (heap_arenas[i]->is_nursery) continue; rv = alloc_page_from_arena(heap_arenas[i], cell_size); @@ -789,7 +789,7 @@ _ejs_gc_init() if (n_allocs) collect_every_alloc = atoi(n_allocs); - // gc-plan P0: allocation/survival/pin instrumentation. The summary + // allocation/survival/pin instrumentation. The summary // goes through atexit because _ejs_gc_shutdown is compiled out by // default (GC_ON_SHUTDOWN in main.c). gc_profile = getenv("EJS_GC_PROFILE") != NULL; @@ -797,10 +797,10 @@ _ejs_gc_init() if (gc_profile) atexit (profile_report_shutdown); - // gc-plan P1: the forwarding helpers are inert until the mover, so + // the forwarding helpers are inert until the mover, so // exercise them here on a scratch buffer when asked — a build whose // header layout breaks the forwarding contract fails loudly instead - // of waiting for gc-P2 to discover it. + // of waiting for the collector to discover it. if (getenv("EJS_GC_SELFTEST")) { uint64_t scratch[2] = { EJS_SCAN_TYPE_OBJECT, 0 }; uint64_t target[2] = { 0, 0 }; @@ -819,7 +819,7 @@ _ejs_gc_init() root_set = NULL; - // gc-plan P2: the generational nursery (EJS_GC_NURSERY=off selects + // the generational nursery (EJS_GC_NURSERY=off selects // the old single-generation collector for A/B and differential runs) nursery_init(); } @@ -834,7 +834,7 @@ _ejs_gc_allocate_oom_exceptions() page_allocation_failed_exc = _ejs_nativeerror_new_utf8 (EJS_ERROR, "page allocation failed"); } -// gc-plan P2: the mark-path scan callback. Slot-based per the new +// the mark-path scan callback. Slot-based per the new // EJSValueFunc contract — this non-moving path only reads through the // slot; the mover's evacuation callback is what rewrites it. static void @@ -903,7 +903,7 @@ void _ejs_gc_mark_thread_stack_bottom(GCObjectPtr* btm) { stack_bottom = btm; - // gc-P2: the write barrier's transient-slot upper bound starts at + // the write barrier's transient-slot upper bound starts at // the main stack's bottom (generator push/pop moves it) _ejs_heap.current_stack_end = (void*)btm; } @@ -938,11 +938,11 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) BitmapCell cell = page->page_bitmap[cell_idx]; if (!cell_is_allocated(page, cell_idx, cell)) continue; - // gc-P2: during a minor collection conservative hits PIN young + // during a minor collection conservative hits PIN young // cells in place; nothing else is this collection's business if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } - // gc-P0: a conservative hit pins under the mover — recorded even + // a conservative hit pins under the mover — recorded even // when the target is already marked (the white check below is a // marking optimization, not a pin filter) if (gc_profile) profile_note_pin(page, cell_idx, gcptr); @@ -957,9 +957,48 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) } } +// gc-frame slots are stack memory, so the conservative +// stack scan would see every precisely-rooted value a second time and +// pin it through its own slot — precision would never move anything. +// During a minor, the scan skips the frame records of the stack being +// scanned (their slots are walked precisely and rewritten). Full GC +// never skips: it relies on the conservative scan seeing the slots. +typedef struct { char* lo; char* hi; } FrameSkipRange; +#define MAX_FRAME_SKIP 1024 +static FrameSkipRange frame_skip[MAX_FRAME_SKIP]; +static int frame_skip_count; + +static void +set_frame_skip_chain(void* chain_head) +{ + frame_skip_count = 0; + for (EJSGCFrame* f = (EJSGCFrame*)chain_head; f; f = f->prev) { + if (frame_skip_count == MAX_FRAME_SKIP) break; // partial skip = extra pins only + char* lo = (char*)f; + char* hi = lo + 16 + 8 * f->count; + // insertion sort by lo; chains are short and near-sorted + int i = frame_skip_count++; + while (i > 0 && frame_skip[i - 1].lo > lo) { + frame_skip[i] = frame_skip[i - 1]; + i--; + } + frame_skip[i].lo = lo; + frame_skip[i].hi = hi; + } +} + +static void +clear_frame_skip(void) +{ + frame_skip_count = 0; +} + static void mark_ejsvals_in_range(void* low, void* high) { + // per-call skip cursor: ranges below `low` are behind us + int fr = 0; + while (fr < frame_skip_count && frame_skip[fr].hi <= (char*)low) fr++; void* p = low; #if IOS while (((uintptr_t)p) & 0x7) { @@ -967,6 +1006,9 @@ mark_ejsvals_in_range(void* low, void* high) } #endif for (; p < high - sizeof(ejsval); p += sizeof(ejsval)) { + // inside a gc-frame record? its slots are precise roots + while (fr < frame_skip_count && frame_skip[fr].hi <= (char*)p) fr++; + if (fr < frame_skip_count && (char*)p >= frame_skip[fr].lo) continue; ejsval candidate_val = *((ejsval*)p); GCObjectPtr gcptr; if (EJSVAL_IS_GCTHING_IMPL(candidate_val)) { @@ -991,10 +1033,10 @@ mark_ejsvals_in_range(void* low, void* high) BitmapCell cell = page->page_bitmap[cell_idx]; if (!cell_is_allocated(page, cell_idx, cell)) continue; - // gc-P2: minor collections only pin young cells here + // minor collections only pin young cells here if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } - // gc-P0: a conservative hit pins under the mover — recorded + // a conservative hit pins under the mover — recorded // even when the target is already marked if (gc_profile) profile_note_pin(page, cell_idx, gcptr); @@ -1019,7 +1061,7 @@ static int num_closureenv_allocs = 0; static int num_primstr_allocs = 0; static int num_primsym_allocs = 0; -// ---- gc-plan P0: measurement instrumentation (EJS_GC_PROFILE=1) ----------- +// ---- measurement instrumentation (EJS_GC_PROFILE=1) ----------- // // Two header bits from the gc-reserved range (57-63; see ejs-types.h — the // shapes machinery masks its 24-bit index, so these are invisible to it): @@ -1027,13 +1069,13 @@ static int num_primsym_allocs = 0; // YOUNG: set at allocation, cleared on the first collection the object // survives. "young" therefore means "allocated since the last // collection" — exactly the population a generational nursery -// (gc-P2) would manage, so per-cycle young-survival is THE +// would manage, so per-cycle young-survival is THE // number that sizes the nursery payoff. // PINNED: set (once per cycle) when a CONSERVATIVE reference — C stack, // spilled registers, generator stacks/contexts — hits the // object. Under the mover these are the objects that cannot // be evacuated this cycle; their count/bytes/sources size the -// payoff of precise JS frames (gc-P3) and decide its ordering. +// payoff of precise JS frames and decide its ordering. // // The YOUNG bit is set unconditionally (an OR folded into the header // store the allocator already does); everything else is gated on @@ -1232,14 +1274,14 @@ profile_report_shutdown(void) prof_alloc_bytes[0] / (1024.0 * 1024.0)); } -// ======================= gc-plan P2: the nursery ============================ +// ======================= the nursery ============================ // // One dedicated arena; size-class pages inside it are bump-allocated // (the seam's per-class bump/limit cursors ARE the allocation state — -// emitted code will bump them inline in P2c). Minor GC is mostly- +// emitted code bumps them inline). Minor GC is mostly- // copying: conservative hits pin young cells in place (established // FIRST), then every precise slot — root list, module exports, -// remembered-set entries, and the transitive scan through the P2a +// remembered-set entries, and the transitive scan through the // slot-based Scan protocol — evacuates its young referent into the old // gen, installs a P1 forwarding record, and is rewritten. Young pages // end the cycle reset (no survivors) or as survivor pages (pins only — @@ -1379,7 +1421,7 @@ rewrite_slot_payload(ejsval* slot, GCObjectPtr to) // pointed at poison after promotion). The two classes in the runtime: // flat strings without an out-of-line buffer (data.flat = self+hdr) and // small EJSArguments (args = self+sizeof). Anything new that embeds a -// self-pointer must be added here — the gc-P5 trace-bitmap redesign +// self-pointer must be added here — the planned trace-bitmap redesign // subsumes this with offset-based addressing. static void minor_fixup_evacuated(GCObjectPtr from, GCObjectPtr to, size_t cell_size) @@ -1445,7 +1487,39 @@ minor_conservative_hit(PageInfo* page, uint32_t cell_idx) minor_wl_push(base); } -// the minor collection's slot callback (the P2a payoff: every precise +#define MAX_GENERATORS 256 +static int generator_count = 0; +static EJSGenerator* generators[MAX_GENERATORS]; + +// walk every gc-frame chain — the running stack's (the +// seam head) plus every suspended generator's saved chain and every +// ACTIVE generator's parked caller segment. Chains are per-stack and +// disjoint; records live in stack frames that stay mapped for exactly +// as long as they are linked (returns unlink, catches re-link their +// own frame past unwound callees, the generator hooks swap heads at +// every stack switch). +// how many young referents the current minor's precise frame walk +// EVACUATED (as opposed to found pinned/forwarded/old) — the direct +// measure that precision is actually moving things (EJS_GC_PROFILE) +static uint64_t gc_frame_moves; + +static void +walk_gc_frames(void (*slot_fn)(ejsval*)) +{ + for (EJSGCFrame* f = (EJSGCFrame*)_ejs_heap.gc_frame_head; f; f = f->prev) + for (uintptr_t i = 0; i < f->count; i++) + slot_fn(&f->slots[i]); + for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) + for (EJSGCFrame* f = (EJSGCFrame*)g->gc_frame_head; f; f = f->prev) + for (uintptr_t i = 0; i < f->count; i++) + slot_fn(&f->slots[i]); + for (int gi = 0; gi < generator_count; gi++) + for (EJSGCFrame* f = (EJSGCFrame*)generators[gi]->caller_gc_frame_head; f; f = f->prev) + for (uintptr_t i = 0; i < f->count; i++) + slot_fn(&f->slots[i]); +} + +// the minor collection's slot callback (the slot-protocol payoff: every precise // scan — roots, modules, remset, transitive object scan — goes through // here). Young referents evacuate (or stay pinned); the slot is // rewritten to the object's final address. @@ -1890,14 +1964,35 @@ _ejs_gc_minor_collect(const char* reason) struct timeval ph0, ph1, ph2, ph3, ph4, ph5; int gen_count = 0; gettimeofday (&ph0, NULL); + // each conservative range scan skips the gc-frame records of + // the stack it is scanning — those slots are precise roots, and + // seeing them conservatively would pin every frame-held value + // through its own slot (precision would never move anything) + set_frame_skip_chain(_ejs_heap.gc_frame_head); mark_thread_stack(); mark_generator_stacks(); for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) { + set_frame_skip_chain(g->gc_frame_head); _ejs_generator_scan_conservative(g); gen_count++; } + clear_frame_skip(); gettimeofday (&ph1, NULL); + // 1.5 the emitted gc-frame chains — precise, relocatable + // JS-frame roots. Runs AFTER the conservative pins on purpose: + // an object visible to both a gc-frame slot and a C frame (an + // ejsval argument into the very runtime call that triggered this + // minor, say) is pinned, and minor_process_slot leaves pinned + // targets in place — the pin must win or the C frame's copy + // dangles. Everything frame-held and NOT C-visible evacuates + // and gets its slot rewritten. + { + uint64_t promoted_before_frames = heap_priv.promoted_objs; + walk_gc_frames(minor_process_slot); + gc_frame_moves = heap_priv.promoted_objs - promoted_before_frames; + } + // 2. precise roots: the root list and module exports evacuate for (RootSetEntry *entry = root_set; entry; entry = entry->next) { if (entry->root) @@ -2057,11 +2152,12 @@ _ejs_gc_minor_collect(const char* reason) paranoid_sweep_check(); if (gc_profile) { #define PHUS(a,b) (((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec)) - _ejs_log ("EJS_GC_PROFILE: minor#%llu reason=%s pause=%.3fms promoted=%llu/%lluKB pins=%llu remset=%d gens=%d phases[pins=%lld roots=%lld dirty=%lld wl=%lld sweep=%lld]us%s\n", + _ejs_log ("EJS_GC_PROFILE: minor#%llu reason=%s pause=%.3fms promoted=%llu/%lluKB pins=%llu gcframe_moves=%llu remset=%d gens=%d phases[pins=%lld roots=%lld dirty=%lld wl=%lld sweep=%lld]us%s\n", (unsigned long long)heap_priv.minors, reason, usec / 1000.0, (unsigned long long)(heap_priv.promoted_objs - promoted_objs_before), (unsigned long long)((heap_priv.promoted_bytes - promoted_bytes_before) / 1024), (unsigned long long)(heap_priv.minor_pins - pins_before), + (unsigned long long)gc_frame_moves, remset_used, gen_count, (long long)PHUS(ph0,ph1), (long long)PHUS(ph1,ph2), (long long)PHUS(ph2,ph3), (long long)PHUS(ph3,ph4), (long long)PHUS(ph4,ph5), @@ -2141,7 +2237,7 @@ young_normalize_for_full_gc(void) static void nursery_init(void) { - // gc-P2 gate decision (2026-07-25): nursery ON by default; + // nursery ON by default (gate decision 2026-07-25); // EJS_GC_NURSERY=off (or =0) selects the old collector for A/B. { char* e = getenv("EJS_GC_NURSERY"); @@ -2174,7 +2270,7 @@ nursery_init(void) _ejs_heap.remset_capacity = NURSERY_REMSET_CAPACITY; heap_priv.remset_other = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); } -// ===================== end gc-plan P2 nursery ============================== +// ===================== end nursery ========================================= static void sweep_heap() @@ -2347,9 +2443,9 @@ mark_from_modules() #error "put code here to mark registers" #endif -#define MAX_GENERATORS 256 -static int generator_count = 0; -static EJSGenerator* generators[MAX_GENERATORS]; +// (MAX_GENERATORS / generators[] / generator_count moved above +// walk_gc_frames, which walks the active chain's parked caller +// segments) void _ejs_gc_push_generator(EJSGenerator* gen) @@ -2359,17 +2455,28 @@ _ejs_gc_push_generator(EJSGenerator* gen) abort(); } generators[generator_count++] = gen; - // gc-P2: keep the barrier's transient-slot bound on the CURRENT stack + // keep the barrier's transient-slot bound on the CURRENT stack _ejs_heap.current_stack_end = gen->stack + gen->stack_size; + // swap in this stack's gc-frame chain; the caller's segment + // parks on the generator until the matching pop + gen->caller_gc_frame_head = _ejs_heap.gc_frame_head; + _ejs_heap.gc_frame_head = gen->gc_frame_head; + gen->gc_frame_head = NULL; // the live chain is the seam head now } void _ejs_gc_pop_generator() { generator_count--; + EJSGenerator* gen = generators[generator_count]; _ejs_heap.current_stack_end = generator_count > 0 ? generators[generator_count - 1]->stack + generators[generator_count - 1]->stack_size : (void*)stack_bottom; + // park this stack's chain on the generator (walked while + // suspended), restore the caller's segment + gen->gc_frame_head = _ejs_heap.gc_frame_head; + _ejs_heap.gc_frame_head = gen->caller_gc_frame_head; + gen->caller_gc_frame_head = NULL; } static void @@ -2387,7 +2494,7 @@ mark_thread_stack() // stack_bottom) is NOT a stack range — it spans from the malloc heap // to the main stack across unmapped memory. Scan only up to the // running generator's stack end; mark_generator_stacks covers the - // suspended caller segments (gc-plan P0). + // suspended caller segments. void* high = (void*)stack_bottom; if (generator_count > 0) { EJSGenerator* running = generators[generator_count - 1]; @@ -2411,7 +2518,7 @@ mark_object_root(GCObjectPtr ptr) if (!cell_is_allocated(page, cell_idx, cell)) return; if (in_minor_gc) { - // gc-P2 minor: a young root pins; an old root's slots may hold + // minor collections: a young root pins; an old root's slots may hold // young references, so queue it for the precise minor scan // (duplicates are harmless — evacuation is idempotent) if (page->young) minor_conservative_hit(page, cell_idx); @@ -2450,8 +2557,13 @@ mark_generator_stacks() void* seg_high = (i == 0) ? (void*)stack_bottom : generators[i - 1]->stack + generators[i - 1]->stack_size; - if (gen->caller_stack_top) + if (gen->caller_stack_top) { + // this caller segment's frames are the chain parked + // at push time (minor only; a full GC leaves skips empty) + if (in_minor_gc) set_frame_skip_chain(gen->caller_gc_frame_head); mark_ejsvals_in_range(gen->caller_stack_top, seg_high); + if (in_minor_gc) clear_frame_skip(); + } } } @@ -2490,7 +2602,7 @@ _ejs_gc_collect_inner(EJSBool shutting_down) large_objs = 0; total_objs = 0; - // gc-P2: full collections need young pages in bitmap-authoritative + // full collections need young pages in bitmap-authoritative // form (active bump pages have no valid FREE bits or counts) young_normalize_for_full_gc(); @@ -2517,7 +2629,7 @@ _ejs_gc_collect_inner(EJSBool shutting_down) mark_generator_stacks(); gettimeofday (&fg[2], NULL); - // gc-P2: dirty objects await their deferred minor scan and may + // dirty objects await their deferred minor scan and may // hold the only reference to young data — root them for (int i = 0; i < _ejs_heap.remset_count; i++) mark_object_root((GCObjectPtr)_ejs_heap.remset[i]); @@ -2526,7 +2638,7 @@ _ejs_gc_collect_inner(EJSBool shutting_down) process_worklist(); gettimeofday (&fg[4], NULL); - // gc-P0: survival + pin census must walk the heap BEFORE the + // survival + pin census must walk the heap BEFORE the // sweep frees the white cells if (gc_profile) profile_pre_sweep(); @@ -2559,7 +2671,7 @@ _ejs_gc_collect_inner(EJSBool shutting_down) sweep_heap(); - // gc-P2: the remembered state may dangle into cells this sweep just + // the remembered state may dangle into cells this sweep just // freed — rebuild it from the live old gen if (!shutting_down) remset_rebuild_after_full_gc(); @@ -2650,7 +2762,7 @@ calc_heap_size() // heap footprint measured after the last collection's sweep. The // collection trigger scales with this: a fixed allocation budget on a // growing live set makes total GC work quadratic in heap size (shapes -// P4.2 moved per-object property storage into the GC heap, which pushed +// shapes moved per-object property storage into the GC heap, which pushed // stage2's self-compile off that cliff — hours of back-to-back full // marks of a ~900MB heap). Letting the heap grow ~50% between full // collections keeps total mark work linear; programs whose footprint @@ -2834,7 +2946,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) if (gc_profile) profile_note_alloc(size, bucket, scan_type); - // gc-P2: nursery-eligible allocations bump-allocate in the young + // nursery-eligible allocations bump-allocate in the young // arena and do NOT feed alloc_size (the full-GC trigger tracks // OLD-gen growth: promotions and direct old allocations). The // every-N stress knob triggers MINOR collections here — the full-GC @@ -2977,7 +3089,7 @@ _ejs_gc_remove_root(ejsval* root) } } -// gc-plan P2 (object-remembering): mark `owner` dirty and queue it for +// object-remembering barrier: mark `owner` dirty and queue it for // the next minor's rescan. The inline half (ejs-gc.h) already filtered // non-young values, young owners, and already-dirty owners. void diff --git a/runtime/ejs-gc.h b/runtime/ejs-gc.h index 9130fffe..d806d5cb 100644 --- a/runtime/ejs-gc.h +++ b/runtime/ejs-gc.h @@ -41,9 +41,9 @@ extern GCObjectPtr _ejs_gc_alloc(size_t size, EJSScanType scan_type); #define _ejs_gc_new_closureenv(sz) \ (EJSClosureEnv *)_ejs_gc_alloc(sz, EJS_SCAN_TYPE_CLOSUREENV) -// ---- gc-plan P1: forwarding plumbing --------------------------------------- +// ---- forwarding plumbing --------------------------------------- // -// Inert until the mover (gc-P2 evacuation / gc-P4 compaction) consumes it; +// Inert until a mover (minor evacuation / major compaction) consumes it; // landed now so the header bit inventory is complete and the helpers are // exercised (EJS_GC_SELFTEST=1) with the old collector still active. // @@ -84,12 +84,12 @@ _ejs_gc_forward(GCObjectPtr from, GCObjectPtr to) | EJS_GC_HEADER_FORWARDED; } -// ---- gc-plan P2: the heap context + generational write barrier ------------- +// ---- the heap context + generational write barrier ------------- // // ALL new collector state lives in the heap context (the Concurrency-II // discipline: an isolate is "one more context", never "another pile of // file statics"). The leading fields are THE emitted-code seam — the -// emitter (P2c) reads bump/limit/nursery bounds through this struct's +// emitter reads bump/limit/nursery bounds through this struct's // exported symbol, so their order and offsets are part of the emitter // contract: append, never reorder. // @@ -109,7 +109,7 @@ typedef struct { void* nursery_end; // -- the dirty-OBJECT buffer (object-remembering): OLD objects // whose owned storage received a YOUNG reference; deduped by the - // DIRTY header bit. (The SATB log of gc-P6 rides the same + // DIRTY header bit. (The future concurrent-marking SATB log rides the same // structure.) -- void** remset; int32_t remset_count; @@ -121,8 +121,31 @@ typedef struct { void* current_stack_end; // -- runtime-private state (an opaque struct in ejs-gc.c) -- void* priv; + // -- head of the CURRENT stack's gc-frame chain (word 17 + // of the emitted seam). Emitted prologues link an EJSGCFrame + // here, epilogues unlink, catch handlers re-link their own frame + // (unwound callees' records die with their stack). Each machine + // stack owns a disjoint chain: the generator push/pop hooks swap + // this head alongside current_stack_end, and suspended + // generators' chains are walked via their saved heads. Minor + // collections process every chain slot PRECISELY (evacuate + + // rewrite) BEFORE the conservative pin pass — a frame-held young + // object therefore MOVES every minor, and the conservative + // scanner's stale copies of it skip via the forwarding check. + void* gc_frame_head; } EJSHeapContext; +// an emitted function's precise-root record, alloca'd in +// its own frame. `slots` hold BOXED ejsvals only (raw f64/i1 values +// are invisible to GC by construction); the emitter initializes every +// slot to undefined at entry — a stale slot must still parse as a +// valid ejsval, never as stack garbage. +typedef struct _EJSGCFrame { + struct _EJSGCFrame* prev; + uintptr_t count; + ejsval slots[1]; // really `count` of them +} EJSGCFrame; + extern EJSHeapContext _ejs_heap; static inline EJSBool @@ -132,7 +155,7 @@ _ejs_gc_is_young(void* p) && (char*)p < (char*)_ejs_heap.nursery_end; } -// The generational write barrier — OBJECT-REMEMBERING (gc-P2, second +// The generational write barrier — OBJECT-REMEMBERING (the second // design). The first design recorded raw slot addresses; slots inside // malloc'd satellites (element buffers, descriptors, map entries) kept // dangling into freed memory — a structural hazard, not a bug tail. diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 107233d0..5aa0bd0e 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -127,7 +127,7 @@ _ejs_generator_start(EJSGenerator* gen) // (`function* g() { return 5; }` -> { value: 5, done: true }). // The iter result is allocated BEFORE the generator leaves the active // chain: we are still executing on the generator's stack here, and a - // collection triggered by this allocation must know that (gc-plan P0 — + // collection triggered by this allocation must know that (found the hard way — // mark_thread_stack's range depends on the chain). gen->completed = EJS_TRUE; gen->yielded_value = _ejs_create_iter_result(rv, _ejs_true); @@ -163,6 +163,8 @@ _ejs_generator_new (ejsval generator_body) rv->stack = malloc(GENERATOR_STACK_SIZE); rv->stack_size = GENERATOR_STACK_SIZE; rv->caller_stack_top = NULL; + rv->gc_frame_head = NULL; // this stack's parked chain + rv->caller_gc_frame_head = NULL; rv->reg_prev = NULL; rv->reg_next = _ejs_generator_registry; if (_ejs_generator_registry) _ejs_generator_registry->reg_prev = rv; @@ -357,7 +359,7 @@ _ejs_generator_specop_allocate() return (EJSObject*)_ejs_gc_new (EJSGenerator); } -// gc-plan P2: the live-generator registry — every generator's suspended +// the live-generator registry — every generator's suspended // stack must be conservatively scanned BEFORE a minor collection starts // evacuating (see ejs-gc.c minor step 1) EJSGenerator* _ejs_generator_registry; @@ -375,7 +377,7 @@ _ejs_generator_specop_finalize (EJSObject* obj) // the conservative half of the generator scan: both saved register // files (the ucontexts) and the live suspended stack segment. Shared // by the specop scan and the minor collection's pre-evacuation registry -// walk (gc-plan P2: conservative ranges must all be seen before any +// walk (conservative ranges must all be seen before any // object moves). void _ejs_generator_scan_conservative (EJSGenerator* gen) @@ -413,7 +415,7 @@ _ejs_generator_scan_conservative (EJSGenerator* gen) // The stack grows DOWN: the live suspended frames sit between the // suspension SP and the stack's END. (This scan used to cover // [stack, sp) — the dead region — and so missed every live frame; - // gc-plan P0.) An SP outside the range (never-started context, + // found the hard way.) An SP outside the range (never-started context, // garbage) degrades to scanning the whole stack, which is merely // conservative. if (saved_sp < gen->stack || saved_sp > stack_end) diff --git a/runtime/ejs-generator.h b/runtime/ejs-generator.h index 56c3b80e..c6fc9dee 100644 --- a/runtime/ejs-generator.h +++ b/runtime/ejs-generator.h @@ -39,7 +39,7 @@ typedef struct _EJSGenerator { void* stack; size_t stack_size; - // gc-plan P2: all live generators sit on a registry so a minor + // all live generators sit on a registry so a minor // collection can scan every suspended stack CONSERVATIVELY before // any evacuation — a generator discovered mid-trace would pin its // stack referents too late (they may already have moved) @@ -50,9 +50,19 @@ typedef struct _EJSGenerator { // this generator (the address of a local in the resuming frame). While // the generator runs, its caller's frames live ABOVE this address (the // stack grows down) — the GC scans [caller_stack_top, caller's stack - // end) to cover the suspended segment (gc-plan P0). + // end) to cover the suspended segment. void* caller_stack_top; + // each machine stack owns a disjoint gc-frame chain. + // The push hook parks the caller's chain head here and installs + // this generator's saved head (NULL on first entry); the pop hook + // does the reverse. While suspended, gc_frame_head is the walk + // root for this stack's precise frames; while running it is NULL + // (the live chain is _ejs_heap.gc_frame_head) and the caller's + // segment is reachable via caller_gc_frame_head. + void* gc_frame_head; + void* caller_gc_frame_head; + ucontext_t generator_context; ucontext_t caller_context; } EJSGenerator; @@ -84,7 +94,7 @@ extern void _ejs_iterator_init_proto (); extern void _ejs_gc_push_generator(EJSGenerator *gen); extern void _ejs_gc_pop_generator(); -/* gc-plan P2: the live-generator registry (ejs-generator.c) + the +/* the live-generator registry (ejs-generator.c) + the conservative half of the generator scan, shared by the specop and the minor collection's pre-evacuation pass */ extern EJSGenerator* _ejs_generator_registry; From 7ef542ac59fce02943a8c4759415dd16b84372ef Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 25 Jul 2026 16:22:44 -0700 Subject: [PATCH 117/146] docs: plans.md becomes the program spine; buckets renumbered; plan ids leave the source MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit plans.md is now the single ordering document: milestones P1-P10, each broken into P#.# phases that REFERENCE bucket-plan phases where the design, gates, and results live. Full historical ticks: P1 EIR pipeline, P2 maam typed arithmetic, P3 shapes, P4 mover foundations (all done); P5 allocation elimination (in progress); P6 compacting shape-fused GC, P7 robustness, P8 language modernization, P9 distribution, P10 concurrent GC (future). Bucket renumbering to the $bucket-P# convention, with formerly-known-as mapping notes in each doc: shapes-plan P4.1..P4.6 -> shapes-P1..P6, sinking-plan S1..S3 -> sinking-P1..P3, maam-plan and gc-plan gain their prefixes. New buckets extracted from the old plans.md and from floating work: compiler-plan.md (EIR history, optimizer residue, the TypeScript port, modules/linking), runtime-plan.md (pinned-bug burn-down, export-boundary wrapper, value-based test harness, collector refactor), language-plan.md (modernization, parser replacement, test262, un-forking external deps), release-plan.md (new: relocatable dist artifact, platform packages, release automation, getting-started — buck2 is great for cross-platform development and wrong for download-and-go). Source comments no longer cite plan ids anywhere in lib/ or runtime/ — the code describes itself (what a comment used to pin with "P4.5:" it now says in words); pointers to design docs by filename remain. Validated by the full matrix x7 at 418 tests/stage lane on the swept tree. Co-Authored-By: Claude Fable 5 --- docs/compiler-plan.md | 64 ++++++++ docs/gc-plan.md | 48 ++++-- docs/language-plan.md | 57 +++++++ docs/maam-plan.md | 19 ++- docs/plans.md | 304 ++++++++++++++++++------------------- docs/release-plan.md | 35 +++++ docs/runtime-plan.md | 53 +++++++ docs/shapes-plan.md | 117 +++++++------- docs/sinking-plan.md | 34 +++-- lib/eir/integrate.ts | 20 +-- lib/eir/ir.ts | 10 +- lib/eir/lower.ts | 60 ++++---- lib/eir/lowtier-probe.ts | 6 +- lib/eir/ops.ts | 8 +- lib/eir/optimize-guards.ts | 32 ++-- lib/eir/optimize.ts | 24 +-- lib/eir/oracle.ts | 26 ++-- lib/eir/printer.ts | 2 +- lib/eir/specialize.ts | 7 +- lib/eir/tests.ts | 38 ++--- lib/eir/verifier.ts | 26 ++-- lib/options.ts | 2 +- lib/runtime.ts | 6 +- lib/types.ts | 2 +- runtime/ejs-exception.c | 2 +- runtime/ejs-object.c | 36 ++--- runtime/ejs-object.h | 4 +- runtime/ejs-shapes.c | 8 +- runtime/ejs-shapes.h | 14 +- runtime/ejs-types.h | 19 ++- runtime/ejs-value.h | 2 +- 31 files changed, 657 insertions(+), 428 deletions(-) create mode 100644 docs/compiler-plan.md create mode 100644 docs/language-plan.md create mode 100644 docs/release-plan.md create mode 100644 docs/runtime-plan.md diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md new file mode 100644 index 00000000..417112db --- /dev/null +++ b/docs/compiler-plan.md @@ -0,0 +1,64 @@ +# compiler-plan: the EIR middle-end, optimizer residue, and the TypeScript port + +Bucket plan; the ordering spine lives in `docs/plans.md` (milestone +references look like `compiler-P1`). Content moved here from the old +plans.md sections "Kill the legacy pipeline", "Optimization phase", +"TypeScript", and "Modules and linking". See `EIRProposal.md` for the +IR design itself. + +## Done: the EIR pipeline (history) + +EIR (the block-argument SSA middle-end in `lib/eir/`) replaced the +AST+intrinsics pipeline outright, in four landed steps: (1) close the +per-function gaps — 424/424 candidate functions, zero fallbacks; (2) +desugars run pre-EIR (classes, destructuring, generators, spread, +meta-properties, hoisting) as pipeline-agnostic AST→AST passes; (3) +toplevel-as-EIR — whole modules lower as one EIR unit; (4) flip the +default and delete — new-cc, LambdaLift, the visitor middle-end and +eleven legacy-only desugars are gone (~9k lines), and a module that +doesn't lower is a compile error. The stage2/stage3 byte-identity +fixed point runs under EIR self-compiles. A pleasant side effect: the +work surfaced 27 latent compiler and runtime bugs, most with +regression tests. + +The optimizer that grew on top (each with its own bucket where large): +guard-region folding/merging + raw f64 joins, function specialization +with a structural escape fence, env scalar replacement, object/array +literal sinking + iterator-wrapper folds (see sinking-plan for the +shaped-world continuation), shape-guard regions (see shapes-plan). + +## Phases + +- [ ] **compiler-P1 — Optimizer residue.** The items from the + original optimization list not owned by sinking-plan or + shapes-plan: + - the usual SSA passes where they pay: constant/copy + propagation, redundant `to_boolean`/`typeof` elimination, + direct-call devirtualization beyond siblings; + - a type lattice over the currently-untyped `any` values, + feeding the low-tier ops beyond what the oracle already + types (TS annotations become a seed once compiler-P3 lands); + - slot-load CSE for toplevel receivers (each module-slot access + currently reloads, which blocks guard-region merging at + toplevel — noted at shapes-P3). +- [ ] **compiler-P2 — TypeScript port of the compiler.** The compiler + converts from JS to TypeScript (largely done for lib/eir/ and + lib/*.ts — the strict-TS conversion landed with the EIR work); + remaining: the babel step in `//lib:generated` becomes tsc, and + the residual JS entry points convert. Sequenced before + language-plan work (new-feature work is safer with types + underneath it). +- [ ] **compiler-P3 — TypeScript as compiler input (tentative).** + Slots in at the parser layer (type-stripping or a parser swap, + coordinated with language-P2). TS type annotations then seed + the compiler-P1 type lattice. +- [ ] **compiler-P4 — Modules and linking.** Static linking remains + the regime (no dynamic loading planned): + - reusable native modules from JS: a driver mode compiling a + module to a `.a` plus a generated `.ejs` manifest (exports in + slot order as the ABI, stably-named init function) so + consumers link against compiled modules without recompiling + them; + - IR in the manifest: serialize the module's EIR so cross-module + analysis and inlining through module boundaries work before — + and instead of — any dynamic-loading story. diff --git a/docs/gc-plan.md b/docs/gc-plan.md index c5af53bd..e8bca484 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -1,5 +1,9 @@ # GC plan: an industrial generational moving collector, co-designed with the compiler +Phase ids here are `gc-P0`..`gc-P7` (formerly bare P0..P7 in this +doc). The ordering spine lives in `docs/plans.md`. + + A plan for replacing echojs's stop-the-world conservative mark-and-sweep collector (`runtime/ejs-gc.c`) with a generational, moving, eventually- concurrent collector — in independently-landable phases, each of which leaves @@ -447,7 +451,7 @@ Bias, as with the eir/maam plans: small phases, matrix green after each each independently revertable. The old collector stays behind a build flag through Phase 3 for A/B and differential testing. -- **Phase 0 — Correctness prerequisites + measurement.** Fix generator stack +- **gc-P0 — Correctness prerequisites + measurement.** Fix generator stack scanning (`ejs-gc.c:1087` stub) — a real bug today, a corruption source under any mover. Add instrumentation: allocation rate and size/kind profile (with the optimizer on), survival rates, and a **pin-rate estimator** — walk @@ -466,13 +470,13 @@ through Phase 3 for A/B and differential testing. of objects/KBs per cycle (⇒ P2 ships on conservative roots; P3 stays behind it), and the `-O2` runtime landed at 3.06× on the self-compile. -- **Phase 1 — Header widening + forwarding plumbing.** 64-bit header, bits +- **gc-P1 — Header widening + forwarding plumbing.** 64-bit header, bits reserved per the shapes tie-in; coordinated `runtime/` + `lib/types.ts` layout change, landed atomically with the old collector active; forwarding read/write helpers. No behavior change. **Gate: matrix green on all three bootstrap targets.** -- **Phase 2 — Generational nursery: the payoff phase.** Block-structured +- **gc-P2 — Generational nursery: the payoff phase.** Block-structured spaces; all new collector state in an instantiable heap-context struct and all emitted heap-state access through the context-accessor seam (§"Concurrency II" — this is when the discipline starts, because this is @@ -488,7 +492,7 @@ through Phase 3 for A/B and differential testing. differential vs. old collector across the whole suite plus a collect-every-N-allocations stress mode; pin-rate report from real runs.** -- **Phase 3 — Precise JS-frame roots.** Emitter-owned gc-frame slots at `E.GC` +- **gc-P3 — Precise JS-frame roots.** Emitter-owned gc-frame slots at `E.GC` safepoints with SSA-use rewriting; chained-frame variant first; env slot address inlining (interior pointers die); allocation-free functions carry no frame. Nursery pins drop to C-frame-referenced objects only. **Gate: @@ -496,13 +500,13 @@ through Phase 3 for A/B and differential testing. vs. Phase 2 recorded; mutator regression from spills measured and acceptable; matrix green.** -- **Phase 4 — Mostly-copying major collection.** Evacuate/compact unpinned +- **gc-P4 — Mostly-copying major collection.** Evacuate/compact unpinned old-gen blocks; pinned cells swept in place; heap actually shrinks. This is where fragmentation dies. **Gate: identical output vs. Phase 3 under stress; demonstrated heap shrink on a fragmenting benchmark; auto-tuned growth target replaces the 60 MB constant, knob census = 1.** -- **Phase 5 — Shapes intersection (floats with maam P4).** When the shapes +- **gc-P5 — Shapes intersection (floats with maam P4).** When the shapes design lands, the collector consumes it: per-shape trace bitmaps replace `scan_type` + virtual `Scan`; inline-slot objects copy as memcpy + bitmap walk; property storage moves into the GC heap; inline allocation extends to @@ -510,12 +514,12 @@ through Phase 3 for A/B and differential testing. maam-plan; the GC-side work is deliberately small because P1 reserved the header bits. -- **Phase 6 — Concurrent marking + STW survivor evacuation.** Collector +- **gc-P6 — Concurrent marking + STW survivor evacuation.** Collector thread, single-mutator handshake, SATB log becomes live. **Gate: marking off the mutator; STW time independent of live-set size; stress-differential green.** -- **Phase 7 — Fully concurrent evacuation (optional).** Brooks forwarding + +- **gc-P7 — Fully concurrent evacuation (optional).** Brooks forwarding + load barrier, only if Phase 6's pause numbers say so. Phases 0–4 deliver the generational mover with no threads and no value-rep @@ -592,7 +596,7 @@ bounds as needed. ## Phase checklist (for /goal sessions) -- [x] **P0** generator-stack fix; alloc/survival/pin instrumentation (optimizer +- [x] **gc-P0** generator-stack fix; alloc/survival/pin instrumentation (optimizer on); `-O2`-runtime experiment + scanner re-verification. *Gate:* matrix green; numbers recorded in this doc or a results doc. DONE 2026-07-24 — docs/gc-p0-results.md has the numbers. Headlines: @@ -604,7 +608,7 @@ bounds as needed. objects/cycle (KBs — conservative pinning is a non-issue, so P2 proceeds WITHOUT P3); runtime `-O2` landed: self-compile 127s→42s (3.06×), types-bench2 2.00s→0.68s. -- [x] **P1** 64-bit header (+ reserved shape/trace bits) + `lib/types.ts` +- [x] **gc-P1** 64-bit header (+ reserved shape/trace bits) + `lib/types.ts` lockstep; forwarding helpers. *Gate:* matrix green, all three bootstrap targets. DONE 2026-07-24. The header half landed 2026-07-23 as the joint @@ -619,7 +623,7 @@ bounds as needed. bit inventory (57 YOUNG / 58 PINNED from P0 profiling, 60-63 still free for mark/card). Local matrix ×7 green; linux targets ride the standing CI bootstrap matrix on push. -- [x] **P2** nursery + inline `make_env` allocation + write barrier + +- [x] **gc-P2** nursery + inline `make_env` allocation + write barrier + evacuating minor GC w/ cell pinning; old collector behind a flag (`EJS_GC_NURSERY=off`), differential + stress lanes; heap-context struct + context-accessor seam from the first line of new code. @@ -638,15 +642,27 @@ bounds as needed. line: no card table and no initializing-store elision — the object-remembering DIRTY bit dedups repeat stores and modules/LOS are handled by unconditional scan / born-dirty instead. -- [ ] **P3** gc-frame precise JS roots (chained variant) + env slot-address +- [x] **gc-P3** gc-frame precise JS roots (chained variant) + env slot-address inlining; move-everything stress mode. *Gate:* stress green; pin-rate delta + spill-cost numbers recorded. -- [ ] **P4** mostly-copying major compaction + auto-tuned growth target. + DONE 2026-07-25 — docs/gc-p3-results.md has the numbers. Headlines: + slot DEMOTION (store at def, load per use) rather than + spill/reload — dominance-safe by construction, forwarding-safe + because the frame escapes through the chain; per-stack chains + swapped by the generator hooks; pin-first ordering (a C-visible + object must not move). The bug measurement caught: the + conservative scan pinned every frame-held value through its own + stack-resident slot — minors now skip the scanned stack's frame + records. 76k relocations/self-compile, pins p50 373→101, net + wall cost ~+1% (env slot inlining pays back half the frame cost). + Deferred: invoke-form safepoints stay pinned; stackmap variant + unmeasured. +- [ ] **gc-P4** mostly-copying major compaction + auto-tuned growth target. *Gate:* heap shrink demonstrated; knob census = 1. -- [ ] **P5** shapes intersection (sequenced by maam P4): trace bitmaps, inline +- [ ] **gc-P5** shapes intersection (sequenced by maam P4): trace bitmaps, inline slots, object-literal inline allocation, typed-slot elisions. -- [ ] **P6** collector thread: concurrent mark (SATB) + STW survivor +- [ ] **gc-P6** collector thread: concurrent mark (SATB) + STW survivor evacuation. *Gate:* STW independent of live-set size. -- [ ] **P7** (optional) Brooks + load barrier for concurrent evacuation — +- [ ] **gc-P7** (optional) Brooks + load barrier for concurrent evacuation — only on Phase 6 evidence. diff --git a/docs/language-plan.md b/docs/language-plan.md new file mode 100644 index 00000000..999caaf4 --- /dev/null +++ b/docs/language-plan.md @@ -0,0 +1,57 @@ +# language-plan: JS modernization and conformance + +Bucket plan; the ordering spine lives in `docs/plans.md` (milestone +references look like `language-P1`). Content moved here from the old +plans.md "JS Modernization" section. + +JavaScript hasn't stood still while this project was on hiatus: there +are new language features to catch up on (optional chaining, nullish +coalescing, class fields, async/await, BigInt, ...), and the kangax +conformance suite this repo tests against has been superseded — tc39 +maintains test262, which is far larger. + +Sequenced after the TypeScript port (compiler-P2) — new-feature work is +safer with types underneath it. + +## Phases + +- [ ] **language-P1 — Gap inventory.** An initial 34-probe census + lives in `test/modernization/` (see its README). Headline: 13 + parser gaps (optional chaining, `??`, class fields, async/await, + `**`, object spread/rest, BigInt, ...), 4 stdlib gaps + (padStart/flat/Object.entries/globalThis), 4 behavioral bugs + (`__proto__:` literal, `/gi` replace, `generator.return()`, and a + hazard: `async m()` object methods parse but silently + miscompile). Remaining work: a test262 subset probe for + exhaustiveness, and a prioritized feature list from it. +- [ ] **language-P2 — Parser replacement.** Keep the slot + interface-shaped (the compiler consumes ESTree; parser behind one + module) with **@babel/parser + its estree plugin as the default** + — it's where stage proposals land first (decorators, pipeline, + pattern matching as enableable plugins); it's zero-dependency and + bundles flat for vendoring. Acorn remains the cheap-swap + alternative. The MAAM analysis framework consumes ESTree and has + no dependency on any particular parser — the compiler/analysis + contract is the ESTree shape of the post-desugar tree, so the + parser choice is free on both sides. Self-hosting wrinkle: + either parser's own source is newer JS than echojs parses, so + vendor a mechanically-regenerable transpiled build (babel to the + supported subset), shrinking the transpile step as modernization + features land. +- [ ] **language-P3 — Feature implementation, payoff-ordered.** Wire + probes into CI as they green. Syntax-only features (optional + chaining, `??`, `**`, spread/rest in objects) are desugar + candidates; async/await and class fields need runtime + emitter + work; BigInt needs a value-representation decision (NaN-boxing + has no spare tag appetite — likely heap-boxed). +- [ ] **language-P4 — test262 lane.** Stand up a curated test262 + subset as a CI lane (the kangax harness stays until parity); + grow toward the full suite as features land. +- [ ] **language-P5 — Un-fork the JS external-deps.** + esprima/escodegen/estraverse/esutils live in `external-deps/` as + lightly-patched copies (build-system compatibility). Move to + published npm packages where possible — published esprima is + unmaintained and still lacks the parser-gap features above, which + is what language-P2 solves; escodegen/estraverse/esutils can come + from npm as-is if the local patches prove to be build-glue only + (diff them first). diff --git a/docs/maam-plan.md b/docs/maam-plan.md index 70b52bd9..fe77bc45 100644 --- a/docs/maam-plan.md +++ b/docs/maam-plan.md @@ -402,7 +402,10 @@ Smaller forward items surfaced by the Chunk A integration review: ## Phase checklist (for /goal sessions) -- [x] **P0** `--types` flag + `lib/eir/oracle.ts` adapter + maam dialect shims +Ids are `maam-P#` (formerly bare P0..P4 in this doc and in commit +messages/results docs). + +- [x] **maam-P0** `--types` flag + `lib/eir/oracle.ts` adapter + maam dialect shims (`handlers`, `defaults`/`rest`, unknown-intrinsic tolerance, toplevel unwrap); stats logging only. *Done 2026-07-19* (maam 1bea5de; echojs d3e3fd1): all gates green, @@ -416,7 +419,7 @@ Smaller forward items surfaced by the Chunk A integration review: without crashing (node-hosted dev tree — buck work trees have no `external-deps/`, so `--types` there warns-and-skips by design); convergence/timing numbers recorded in the PR. -- [x] **P1** maam: ⊤-degradation + `nodeTypes()`/`typeOfNode()` (node-identity +- [x] **maam-P1** maam: ⊤-degradation + `nodeTypes()`/`typeOfNode()` (node-identity keyed); echojs: `TypeOracle` + `--types-dump`. Per the P0 results, P1 should FRONT-LOAD maam normalizer coverage for TemplateLiteral, ForOfStatement, and destructuring/defaults/rest params (these block @@ -442,7 +445,7 @@ Smaller forward items surfaced by the Chunk A integration review: obvious next precision win for P2/P3. *Gate:* maam suite green (incl. new node-identity tests); matrix green; hand-checked oracle dump for `test/eir-toplevel1.js`. -- [x] **P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; +- [x] **maam-P2** emit + verify `has_tag`/`unbox_f64`/`box_f64`/`f64_*`; `Inst.type` carries `"f64"`/`"i1"`. *Gate:* `//:test-eir` green with new low-tier tests; matrix green — the matrix line now includes `//:test-eir-lowtier` (standalone @@ -460,7 +463,7 @@ Smaller forward items surfaced by the Chunk A integration review: cond_br accepts i1 or legacy "any" conditions. Runtime backlog item found: `_ejs_op_div` aborts EJS_NOT_IMPLEMENTED on non-number LHS (ejs-ops.c ~901) — sub/mul coerce, div doesn't. -- [x] **P3** oracle-guided guarded arithmetic in `LowerFunction.binary`, +- [x] **maam-P3** oracle-guided guarded arithmetic in `LowerFunction.binary`, `--types`-gated. *Gate:* matrix green + stage2≡stage3 functional gate (flag off); full-suite `--types` @@ -479,7 +482,7 @@ Smaller forward items surfaced by the Chunk A integration review: green. Numbers in docs/maam-p0-results.md "Phase 3 gates". The lane script fails on zero-files-compared and zero-diamonds (vacuous-pass guards from review). -- [x] **P3.4** diamond pre-work, trust-free (see the Phase 3.4 section): +- [x] **maam-P3.4** diamond pre-work, trust-free (see the Phase 3.4 section): dominated-guard elimination + f64 block params for optimizer-created joins. Landed as lib/eir/optimize-guards.ts: proven-number guard folding (dominator-tree facts + value-intrinsic @@ -493,7 +496,7 @@ Smaller forward items surfaced by the Chunk A integration review: boxing once); types-bench1 + the hypot2 demo re-measured, deltas vs the Phase 3 baselines recorded in docs/maam-p0-results.md "Phase 3.4 gates". -- [x] **P3.5** differential harness in maam repo (`concreteEval` vs node vs +- [x] **maam-P3.5** differential harness in maam repo (`concreteEval` vs node vs ejs on closed-world tests) wired into its CI. *Gate:* zero divergences on the curated corpus. Landed as maam test/differential/ (`npm run diff-harness`, in maam CI): @@ -511,7 +514,7 @@ Smaller forward items surfaced by the Chunk A integration review: later-declared same-scope vars silently dropped; generalized to function expressions/arrows/methods after adversarial review) — details in docs/maam-p0-results.md "Phase 3.5". -- [x] **P3.6** typed calling convention / function specialization +- [x] **maam-P3.6** typed calling convention / function specialization (see the Phase 3.6 section; HARD PRECONDITION: P3.5 green): local-closed-world escape analysis, specialized unboxed clones + direct calls; exports are NEVER specialized (boxed slot ABI is a @@ -552,7 +555,7 @@ Smaller forward items surfaced by the Chunk A integration review: loop (before/after regenerated in ~/src/echojs/hypot2-types-before-after.txt). Details in docs/maam-p0-results.md "Phase 3.6 gates". -- [x] **P4** (design doc only) shape-guarded property access: guard op, +- [x] **maam-P4** (design doc only) shape-guarded property access: guard op, runtime layout, promotion criteria from Phase 3 experience. Delivered as **docs/shapes-plan.md** (2026-07-23): type-aware runtime shape tree mirroring maam's classes 1:1 (representation in diff --git a/docs/plans.md b/docs/plans.md index 7e2dc26d..f3f7f26a 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -1,155 +1,149 @@ -# echojs — planned work - -A living document; ordering within a section is roughly priority. See -`EIRProposal.md` for the IR design itself. - -## Kill the legacy pipeline (done) - -EIR (the block-argument SSA middle-end in `lib/eir/`) replaced the -AST+intrinsics pipeline (new-cc, LambdaLift, the statement/expression -half of LLVMIRVisitor). All four phases landed, and the legacy -middle-end has been deleted outright: - -1. **Close the per-function gaps** — done. The self-hosted compiler - lowers 424/424 candidate functions with zero fallbacks (try/finally, - per-iteration loop environments, arrow lexical `this`, `arguments`, - rest/default params, for-in, spread, and friends). -2. **Desugars run pre-EIR** — done. Classes, destructuring, generators - (coroutine-style), spread, meta-properties and function-declaration - hoisting are pipeline-agnostic AST→AST passes that run before EIR - collection; EIR lowers their `%`-intrinsics via the table in - `lib/eir/intrinsics.js`. Defaults/rest deliberately stay legacy-only: - EIR's native handling is strictly better, and the passes die with the - legacy pipeline. -3. **Toplevel-as-EIR** — done. Whole modules (toplevel statements, - import/export init, every nested function) lower as one EIR unit; - the legacy side keeps only module scaffolding. The toplevel-built - compiler bootstraps and passes the full suite; labeled statements, - object-literal accessors, tagged templates and new-with-spread all - lower natively. Per-function candidate mode and its forwarding - thunks are gone: a module the toplevel can't own falls back to the - legacy pipeline whole, with a warning. -4. **Flip the default, then delete** — done. EIR is the only pipeline. - A module that doesn't lower is a compile error; the remaining - source-reachable unsupported constructs (`with`, delete-of-a- - variable, computed accessor keys — which no pipeline ever compiled) - are each asserted by a unit test, and everything else is guarded - defensively behind the parser or the pre-EIR desugars. new-cc, - LambdaLift, exitable-scope, the visitor middle-end and eleven - legacy-only desugar passes are gone (~9k lines); LLVMIRVisitor keeps - only the module scaffolding the EIR emitter borrows (module - info/resolution, atoms, literal infrastructure). Export accessors - are built directly as EIR. The stage2/stage3 byte-identity fixed - point runs under EIR self-compiles. - -A pleasant side effect: the EIR work surfaced 27 latent compiler and -runtime bugs, most with regression tests. - -## Optimization phase (after the legacy kill) - -Now that the IR is SSA with a declared effect table (`lib/eir/ops.js`), -a real optimizer becomes tractable. The guiding goal: **readable JS -idioms that overallocate should become zero-cost when semantics are -preserved** — destructuring returns, options objects, tuple-ish arrays. - -- **Escape analysis + allocation sinking** — the big one. One analysis - over the SSA graph (escaping positions: call/construct operands, - `set_prop` values, returns/throws, module-slot stores; direct calls - give cheap interprocedural edges), then sink in payoff order: - 1. `make_env` — every closure-bearing function allocates one, and - per-iteration loop envs multiply that in hot loops; non-escaping - closure environments scalar-replace into SSA values. - 2. `make_object`/`make_array` + own-key `get_prop_atom` folding — - exactly the shape the destructuring desugar emits. - 3. A peephole recognizing the iterator-wrapper-over-array-literal - pattern, rewriting to direct indexing so array patterns sink too. - 4. `rest_args`/`args_obj` when only indexed or `.length`'d. -- The usual SSA passes ride along cheaply once the framework exists: - constant/copy propagation, DCE, redundant `to_boolean`/`typeof` - elimination, direct-call devirtualization beyond siblings. -- A type lattice over the currently untyped (`any`) values, feeding the - low-tier ops (`has_tag`/`unbox_f64`/`f64_*`) for unboxed arithmetic. -- **MAAM abstract-interpreter integration**: hook EIR up to the - MAAM-based abstract interpreter being developed alongside this repo. - It supplies types — including object shapes — which both seeds the - type lattice above and strengthens allocation sinking (shape - information makes own-key folding and escape reasoning sound in far - more cases). The `ops.js` effect table is the declared contract for - this consumer. - -## TypeScript - -1. **The compiler converts from JS to TypeScript.** Sequenced after the - legacy pipeline is gone, remaining bugs are fixed, and test coverage - grows (dedicated CI steps). Until then, avoid JS-idiom churn that a - TS port would redo. The babel step in `//lib:generated` becomes tsc. -2. **TypeScript as compiler input — tentative.** Would slot in at the - parser layer (type-stripping or a parser swap). If it happens, TS - type annotations are a natural seed for the EIR type lattice above. - -## JS Modernization (after the TypeScript port) - -JavaScript hasn't stood still while this project was on hiatus: there -are new language features to catch up on (optional chaining, nullish -coalescing, class fields, async/await, BigInt, ...), and the kangax -conformance suite this repo tests against has been superseded — tc39 -maintains test262, which is far larger. The effort: - -- Inventory the gap: an initial 34-probe census lives in - `test/modernization/` (see its README). Headline: 13 parser gaps - (optional chaining, `??`, class fields, async/await, `**`, object - spread/rest, BigInt, ...), 4 stdlib gaps (padStart/flat/ - Object.entries/globalThis), 4 behavioral bugs (`__proto__:` literal, - `/gi` replace, `generator.return()`, and a hazard: `async m()` - object methods parse but silently miscompile). A test262 subset - probe should follow for exhaustiveness. -- Implement in payoff order; wire probes into CI as they green. -- **Un-fork the JS external-deps**: esprima/escodegen/estraverse/esutils - live in `external-deps/` as lightly-patched copies (build-system - compatibility). Move to published npm packages where possible — and - note that published esprima is unmaintained and still lacks the - parser-gap features above, so the parser slot likely wants a - maintained ESTree-compatible parser (acorn) behind the same - interface; escodegen/estraverse/esutils can come from npm as-is if - the local patches prove to be build-glue only (diff them first). - Parser choice: keep the slot interface-shaped (the compiler consumes - ESTree; parser behind one module) with **@babel/parser + its estree - plugin as the default** — it's where stage proposals land first - (decorators, pipeline, pattern matching as enableable plugins), which - we want access to; it's zero-dependency and bundles flat for - vendoring. Acorn remains the cheap-swap alternative. The MAAM - analysis framework consumes ESTree and has no dependency on any - particular parser (it happens to use acorn today only as an ESTree - producer) — so the compiler/analysis contract is the ESTree shape of - the post-desugar tree, and the parser choice is free on both sides. - Self-hosting wrinkle: either - parser's own source is newer JS than echojs parses, so vendor a - mechanically-regenerable transpiled build (babel to the supported - subset), shrinking the transpile step as modernization features land. - -Sequenced after the TypeScript port — new-feature work is safer with -types underneath it. - -## Modules and linking - -Static linking remains the regime (no dynamic loading planned). - -- **Reusable native modules from JS**: a driver mode that compiles a - module to a `.a` plus a generated `.ejs` manifest — exports in slot - order as the ABI, stably-named init function — so consumers link - against compiled modules without recompiling them. -- **IR in the manifest**: serialize the module's EIR into the manifest - so cross-module static analysis and inlining through module - boundaries work before (and instead of) any dynamic-loading story. - -## Testing / CI - -- Test baselines are mostly generated live by running `node `, - which makes them sensitive to node's console.log inspect-format - drift (22.4 -> 22.23 changed array formatting); CI pins node 22.4.0. - The durable fix is a harness that asserts on values rather than - inspect output. - -- The stage ladder (`//:test-eir`, `//:test-stage0..3`) IS the EIR - matrix now; the `-ir`/`-legacy` target duplicates are gone. -- Broader coverage generally, as a prerequisite for the TS port. +# echojs — the program of work + +The single ordering document. Milestones are `P#`, their phases +`P#.#`; each phase *references* a bucket plan's phase (`gc-P2`, +`shapes-P4`, ...) where the design, gates, and results live. Bucket +plans: `compiler-plan.md`, `maam-plan.md`, `shapes-plan.md`, +`gc-plan.md`, `sinking-plan.md`, `runtime-plan.md`, `language-plan.md`, +`release-plan.md`. Results docs (`*-results.md`) record gate numbers +per landed phase. + +Conventions: a milestone is done when every phase is; phases within a +milestone are ordered; milestones are ordered but adjacent future +milestones can interleave when their buckets don't touch. Bucket +phase ids are stable — commit messages and results docs written before +2026-07-25 use the pre-rename ids (maam's bare P0..P4, shapes' P4.1.. +P4.6, sinking's S1..S3, gc's bare P0..P7); each bucket doc carries the +mapping. + +## P1 — The EIR pipeline [x] + +One SSA middle-end, no legacy path. Detail: compiler-plan.md +(history section) and `EIRProposal.md`. + +- [x] **P1.1** close the per-function lowering gaps (424/424, zero + fallbacks). +- [x] **P1.2** desugars run pre-EIR (classes, destructuring, + generators, spread, hoisting). +- [x] **P1.3** toplevel-as-EIR: whole modules lower as one unit. +- [x] **P1.4** flip the default, delete the legacy middle-end (~9k + lines); stage2/stage3 byte-identity under EIR self-compiles. + +## P2 — Typed arithmetic: the maam oracle [x] + +An abstract-interpretation type oracle feeding guarded unboxed +arithmetic. Detail: maam-plan.md; numbers in maam-p0-results.md. + +- [x] **P2.1** oracle adapter + dialect shims (maam-P0). +- [x] **P2.2** ⊤-degradation + node-identity queries (maam-P1). +- [x] **P2.3** low-tier ops: has_tag/unbox/box/f64_* (maam-P2). +- [x] **P2.4** guarded arithmetic diamonds (maam-P3). +- [x] **P2.5** trust-free guard folding, region merging, raw f64 + joins (maam-P3.4). +- [x] **P2.6** differential harness: concreteEval vs node vs ejs + (maam-P3.5). +- [x] **P2.7** typed calling convention / function specialization + (maam-P3.6). ~46× on the phase bench. + +## P3 — Shapes [x] + +Type-aware hidden classes, slot storage, guarded property fast paths. +Detail: shapes-plan.md (designed as maam-P4). + +- [x] **P3.1** runtime shape tracking, dual bookkeeping (shapes-P1). +- [x] **P3.2** slot storage + dictionary migration (shapes-P2). +- [x] **P3.3** shape-guarded fast paths under --types (shapes-P3). +- [x] **P3.4** born with their shape (shapes-P4). +- [x] **P3.5** typed slots + shape/numeric region fusion (shapes-P5). +- [x] **P3.6** measured extensions: 2-way polymorphic guard chains; + accessor inlining/pretenuring/array-shapes declined on evidence + (shapes-P6). + +## P4 — Mover foundations [x] + +The generational moving collector, through precise JS roots. Detail: +gc-plan.md; numbers in gc-p0/p2/p3-results.md. + +- [x] **P4.1** measurement + generator-scan fixes + runtime -O2 + (gc-P0). Verdict that shaped this milestone: pins are tiny, so + the nursery ships on conservative roots. +- [x] **P4.2** 64-bit header + forwarding plumbing (gc-P1). +- [x] **P4.3** nursery + object-remembering barrier + evacuating + minor + emitted inline env allocation, default ON (gc-P2). +- [x] **P4.4** emitter gc-frames: precise relocatable JS roots + env + slot-address inlining + move-everything stress (gc-P3). + +## P5 — Allocation elimination [~] + +Delete the allocations the mover made cheap. Detail: sinking-plan.md. + +- [x] **P5.1** shaped-literal sinking + own-key folding + (sinking-P1). +- [ ] **P5.2** epoch-guarded constructor-result sinking — the + types-bench2 alloc loop (sinking-P2). +- [ ] **P5.3** flow-sensitive field writes, partial escapes, + rest_args/args_obj (sinking-P3). +- [ ] **P5.4** optimizer residue: SSA cleanups, type lattice, + slot-load CSE for toplevel receivers (compiler-P1). + +## P6 — Compacting, shape-fused GC + +The heap shrinks; the collector consumes the object model. Detail: +gc-plan.md, shapes-plan.md (Step B). + +- [ ] **P6.1** mostly-copying major compaction + auto-tuned growth + target (gc-P4). +- [ ] **P6.2** shapes intersection: per-shape trace bitmaps, inline + slots, object-literal inline allocation, typed-slot barrier + elision (gc-P5; consumes shapes-plan's deferred Step B). +- [ ] **P6.3** collector structural refactor: cell-lifecycle module, + LOS lookup, file split (runtime-P4; can land any time after + P6.1, behavior-preserving). + +## P7 — Robustness + +The correctness debts, paid down. Detail: runtime-plan.md, +compiler-plan.md. + +- [ ] **P7.1** pinned runtime-bug burn-down (runtime-P1). +- [ ] **P7.2** export-boundary wrapper: specialization across escaping + entry points (runtime-P2). +- [ ] **P7.3** value-based test harness, un-pinning node's inspect + format (runtime-P3). +- [ ] **P7.4** finish the TypeScript port of the compiler; babel step + becomes tsc (compiler-P2). + +## P8 — Language modernization + +Catch up with the language; adopt test262. Detail: language-plan.md. + +- [ ] **P8.1** gap inventory + test262 subset probe (language-P1). +- [ ] **P8.2** parser replacement behind the ESTree seam + (language-P2; coordinates with compiler-P3 if TS input + happens). +- [ ] **P8.3** features in payoff order (language-P3). +- [ ] **P8.4** test262 CI lane (language-P4). +- [ ] **P8.5** un-fork the JS external-deps (language-P5). + +## P9 — Distribution + +From repo to product. Detail: release-plan.md, compiler-plan.md. + +- [ ] **P9.1** relocatable dist artifact + LLVM toolchain policy + (release-P1). +- [ ] **P9.2** platform packages: homebrew, linux, npm wrapper + (release-P2). +- [ ] **P9.3** versioning + release automation off the bootstrap + matrix (release-P3). +- [ ] **P9.4** getting-started surface (release-P4). +- [ ] **P9.5** reusable native modules + IR-in-manifest cross-module + linking (compiler-P4). + +## P10 — Concurrent GC + +Pause bounds independent of live-set size. Detail: gc-plan.md. + +- [ ] **P10.1** collector thread: concurrent mark (SATB) + STW + survivor evacuation (gc-P6). +- [ ] **P10.2** fully concurrent evacuation — only on P10.1's pause + evidence (gc-P7). diff --git a/docs/release-plan.md b/docs/release-plan.md new file mode 100644 index 00000000..a08a2874 --- /dev/null +++ b/docs/release-plan.md @@ -0,0 +1,35 @@ +# release-plan: packaging and distribution + +Bucket plan; the ordering spine lives in `docs/plans.md` (milestone +references look like `release-P1`). New bucket (2026-07-25): the +buck2 build is great for cross-platform development, but it is not the +answer for people who just want to download a package and go. + +## Phases + +- [ ] **release-P1 — Relocatable binary artifact.** Define what an + installed echojs IS: the `ejs` driver binary, the runtime static + libraries (`libecho.a` + friends), the srcdir headers/manifests + the driver needs, and a pinned LLVM toolchain policy (today the + driver spawns `opt`/`llc` from a baked bindir — an installed + package must either vendor the LLVM tools it needs or discover a + compatible installation and fail loudly; the llvm@16-on-PATH + miscompile taught us "fail loudly"). Deliverable: a `buck2 + build //:dist` (or script) that produces a self-contained, + relocatable tarball per platform, exercised in CI. +- [ ] **release-P2 — Platform packages.** Homebrew formula/cask for + macOS (arm64 first), a deb/rpm or tarball+install.sh for Linux + (arm64 + x86_64 — the CI bootstrap matrix already proves the + targets). An npm wrapper package is worth considering for the + node-adjacent audience (postinstall fetches the platform + tarball). +- [ ] **release-P3 — Versioning + release automation.** Semver + scheme, a changelog discipline, tagged releases built by CI from + the bootstrap matrix (a release is a green matrix + packaged + artifacts + smoke test of the installed package compiling a + hello-world on a clean machine/container). +- [ ] **release-P4 — Getting-started surface.** A quickstart README + path that assumes the package (not the repo): install, compile a + file, link a multi-module program; document the supported + language subset honestly (pointing at language-plan status) + and the flag surface (`--types`, GC knobs) that users may touch. diff --git a/docs/runtime-plan.md b/docs/runtime-plan.md new file mode 100644 index 00000000..21398f57 --- /dev/null +++ b/docs/runtime-plan.md @@ -0,0 +1,53 @@ +# runtime-plan: correctness burn-down and runtime features + +Bucket plan; the ordering spine lives in `docs/plans.md` (milestone +references look like `runtime-P1`). This bucket owns the pinned +runtime bugs (found by the differential harnesses and pinned by tests, +deliberately not fixed mid-phase) and runtime-side features that no +performance bucket owns. + +## Phases + +- [ ] **runtime-P1 — Pinned-bug burn-down.** Each has a pinning test + or a recorded repro; fix in any order, keeping the differential + lanes green: + - `typeof null` → `"null"` (should be `"object"`). + - `-0 === 0` evaluates false (should be true). + - `Math.round(-2.5)` → `-3` (should be `-2`; ties round toward + +∞). + - `Number(" 7 ")` → `NaN` (whitespace should trim). + - `-8 >>> 28` → `0` (should be `15`; unsigned-shift coercion). + - `1 + null` aborts in the runtime (ejs-ops.c generic add) — + should evaluate to `1`. + - `"a" * "b"` aborts (`_ejs_op_mult`) — should be `NaN`. Repro + note: probes must exercise repr-mismatch via reads until fixed. + - An uncaught throw out of a generator body aborts (the desugar's + outer catch rethrows on the generator stack and the unwinder + walks off the makecontext frame; node prints the error in the + caller). Exceptions/coroutine interaction needs an owner. + - Sparse-array `set` through the exotic path is NOT_IMPLEMENTED + (`new Array(N)` + `arr[i] =` aborts) — tests avoid the pattern + today. + - `getOwnPropertyNames` on non-enumerable-bearing objects + diverges from node (pre-existing, mode-independent). +- [ ] **runtime-P2 — Export-boundary wrapper.** Escaping entry points + currently pin down specialization and unguarded-consumption + opportunities (the compiler buckets decline them). A generated + boundary wrapper — generic signature outside, dispatching to + specialized/trusting internals — lets module-internal call graphs + optimize while exports keep full dynamic semantics. (Referenced + by maam-plan and sinking-plan as the standing follow-on.) +- [ ] **runtime-P3 — Value-based test harness.** Test baselines are + generated live by `node ` and are sensitive to node's + console.log inspect-format drift (22.4 → 22.23 changed array + formatting); CI pins node 22.4.0. The durable fix asserts on + values rather than inspect output. +- [ ] **runtime-P4 — Collector structural refactor.** Recorded during + the gc-P2 debugging sessions, deliberately deferred while phases + were landing: extract a cell-lifecycle module (alloc/free/color + in one place), kill the mark-color mask flip in favor of explicit + epochs, aligned LOS regions with O(log n) lookup (also unblocks + raising the shaped-object field cap past 14), a real root + registry API, one collection-policy function, and a file split + (ejs-gc.c is ~3k lines). Behavior-preserving; gated on the + differential lanes. diff --git a/docs/shapes-plan.md b/docs/shapes-plan.md index a1e206ad..e206f530 100644 --- a/docs/shapes-plan.md +++ b/docs/shapes-plan.md @@ -1,5 +1,10 @@ # Shapes: shape-guarded property access, co-designed with the GC (maam P4) +Phase ids here are `shapes-P1`..`shapes-P6` (formerly maam-P4.1..P4.6 — +the bucket was born as maam's fourth phase; commit messages and results +docs use the old ids). The ordering spine lives in `docs/plans.md`. + + This is the maam-plan **P4 design document** — the phase the plan scoped as "design doc only" and deferred "until Phase 3 has proven the pipeline." Phase 3 has: typed arithmetic (P3), trust-free guard-region optimization @@ -311,7 +316,7 @@ The compiler-side `TypeOracle` (lib/eir/oracle.ts) grows the same three queries plus pass-through of `shapeCapHits`/megamorphic flags for the promotion gates. `--types-dump` grows a per-site shape census (diagnostics first — the plan's original P4 note — which doubles as the -instrumentation the P4.1 gate needs). +instrumentation the shapes-P1 gate needs). ## Promotion criteria — what Phase 3 taught us @@ -322,8 +327,8 @@ The trust ladder, restated as policy for shapes: site, every guarded field's repr a single tag. Wrong oracle = slow path taken = speed lost, never correctness — the P3 contract. 2. **Exact facts only, no near-misses.** Three or more terminal shapes - ⇒ no diamond; exactly two lower to the P4.6 2-way chain (measured and - landed — see the P4.6 entry), and only when EVERY shape in the answer + ⇒ no diamond; exactly two lower to the shapes-P6 2-way chain (measured and + landed — see the shapes-P6 entry), and only when EVERY shape in the answer passes the same exactness screen and carries the accessed field; union-repr fields load boxed; anything the oracle degraded (`degradedBindings`, unknown calls touching the receiver) declines. @@ -365,10 +370,10 @@ The trust ladder, restated as policy for shapes: shape sets (`abstract ⊒ concrete`, the containment-lane pattern), and `ejs` runs must agree with node on shape-sensitive observables (`Object.keys` order, `in` during construction, delete-then-readd, - freeze/seal, accessor conversion). Guarded-phase work (P4.3) does not - wait for this; born-with-shape (P4.4) hard-requires it — the P3.5/P3.6 + freeze/seal, accessor conversion). Guarded-phase work (shapes-P3) does not + wait for this; born-with-shape (shapes-P4) hard-requires it — the P3.5/P3.6 sequencing, replayed. -- **Runtime differential mode.** P4.1/P4.2 land behind `EJS_SHAPES=off`; +- **Runtime differential mode.** shapes-P1/shapes-P2 land behind `EJS_SHAPES=off`; the whole test suite runs both modes and byte-compares (the old- collector A/B discipline from gc-plan). A transition-storm stress test (add/delete/type-flip churn) and the collect-every-N stress compose. @@ -392,7 +397,7 @@ The trust ladder, restated as policy for shapes: types-bench1; measured at every phase gate (guarded, born-shaped, typed-slots deltas recorded like 10.3×→14.0×→46× was). - **splay** (the shape-stress classic; maam's own shape work was tuned on - it) as the polymorphism/transition stress once P4.2 lands. + it) as the polymorphism/transition stress once shapes-P2 lands. - The gc-plan Phase 0 allocation profile doubles as the object-size/ field-count census that sizes slot-array classes. @@ -401,7 +406,7 @@ The trust ladder, restated as policy for shapes: Same bias as eir/maam/gc: small phases, matrix green after each, each revertable, runtime phases A/B-able against the old path. -- [x] **P4.1 — Runtime shape tracking, behind the scenes.** DONE +- [x] **shapes-P1 — Runtime shape tracking, behind the scenes.** DONE 2026-07-23. Shape table + transition cache (`runtime/ejs-shapes.{h,c}`); ordinary objects get shape indices maintained on insert/delete/type-flip; the MAP REMAINS the store @@ -410,15 +415,15 @@ revertable, runtime phases A/B-able against the old path. `EJS_SHAPE_CAP` overrides the per-object field cap (default 64). Header bits landed as the gc-P1 joint layout: `GCObjectHeader` is now `uint64_t` (ejs-types.h documents the split — low 32 unchanged, - bits 32-55 shape index, bit 56 P4.2 mode bit, 57-63 reserved gc); + bits 32-55 shape index, bit 56 shapes-P2 mode bit, 57-63 reserved gc); `EJSObject`/`EJSPrimString`/`EJSPrimSymbol` sizes unchanged (padding absorbed), `EJSClosureEnv` +8; `lib/types.ts` mirrored in - the same commit (header as two i32 fields so P4.3's `has_shape` + the same commit (header as two i32 fields so shapes-P3's `has_shape` can load the shape half directly). *Gate results:* matrix green (test-eir, lowtier, stages 0-3); stage1 suite green with shapes on AND under EJS_SHAPES=off — the off-mode run is a standing buck lane, `//:test-stage1-shapes-off` - (buck-test-stage.sh grew a TEST_ENV arg; the P4.2 both-modes + (buck-test-stage.sh grew a TEST_ENV arg; the shapes-P2 both-modes byte-identical gate extends this lane); property-insert micro-overhead **2.1%** (mean of 5 interleaved runs, 300k objects × 8 fresh atom-keyed inserts — the worst case; @@ -433,8 +438,8 @@ revertable, runtime phases A/B-able against the old path. dominate; user objects stay shaped). Death census needs a collection to fire (finalize-driven), so short probes report 0 deaths — the shapes analog of gc-P0's numbers lands with real - workloads in the P4.2 gate. -- [x] **P4.2 — Slot storage for shaped objects.** DONE 2026-07-24. + workloads in the shapes-P2 gate. +- [x] **shapes-P2 — Slot storage for shaped objects.** DONE 2026-07-24. The union flip landed: `EJSObject`'s fourth word is now `union { EJSPropertyMap* map; ejsval slots; }` — shaped-mode objects store plain data property values in a **closureenv** slot @@ -479,7 +484,7 @@ revertable, runtime phases A/B-able against the old path. fixes stage2's self-compile completes normally (ejs-process CPU: 92s shapes-on vs 62s off on the same binary — the ~1.5× is env alloc churn plus wide-object migrate-through; the raw win arrives - with P4.3's guarded fast paths, and P4.5/gc-P5 own the layout + with shapes-P3's guarded fast paths, and shapes-P5/gc-P5 own the layout end-state). *Gate results:* matrix green — test-eir, lowtier, stages 0-3, and the `//:test-stage1-shapes-off` A/B lane (no kangax runner exists @@ -493,13 +498,13 @@ revertable, runtime phases A/B-able against the old path. **set 3.2× faster** than the map (6.35s vs 19.9s — no hash, no strict-eq chain, no descriptor churn), **get 1.09×** (5.95s vs 6.47s; the generic-call overhead still dominates — the raw win is - P4.3's guarded fast paths), insert 8×N **~3% slower** (1.93s vs + shapes-P3's guarded fast paths), insert 8×N **~3% slower** (1.93s vs 1.88s: one closureenv alloc + one grow-copy per 8-field object — - within the P4.1 <5% bar, and the shaped path now does real work + within the shapes-P1 <5% bar, and the shaped path now does real work instead of dual bookkeeping). Census on the storm probe: 383 born tracked, 315 shapes, 1365 transitions (48% memo fast hits), 210 repr flips, migrations correctly attributed. -- [x] **P4.3 — Guarded fast paths under --types.** DONE 2026-07-24 +- [x] **shapes-P3 — Guarded fast paths under --types.** DONE 2026-07-24 (gate results below). As built: - **Ops** (`lib/eir/ops.ts`): `has_shape` (NONE, i1), `slot_load` (READ) / `slot_store` (WRITE) with imms @@ -534,14 +539,14 @@ revertable, runtime phases A/B-able against the old path. NaN-box object check into the header-high-half compare against a per-shape i32 module global (`isObject`/`objectPointer` live beside isNumber in compiler.ts); `slotRef` is THE addressing - seam (P4.2 closureenv slot arrays today, gc-P5 inline slots + seam (shapes-P2 closureenv slot arrays today, gc-P5 inline slots later); interns flush into the literal-init function's return block after all atom inits (`emitShapeInterns`). - **maam**: `receiverShapesOfNode` (terminal-filtered, node- identity, fail-soft) + `fieldOrderOfShape` (the ordered witness = first-interning insertion order; a runtime object built in another order just misses the guard). `layoutOfNode`/ - `constructorReportOfNode` are P4.4 consumers and wait there. + `constructorReportOfNode` are shapes-P4 consumers and wait there. - **Lowering** (`lower.ts` propGet/propSet): diamonds at every atom-keyed member get/set incl. compound assign, ++/--, method loads, and destructuring reads. Exact facts only (criterion 2): @@ -568,7 +573,7 @@ revertable, runtime phases A/B-able against the old path. (`.atom @line:col: guarded shape=... slot=N | declined reason`); EIR-opt debug line grows shape guard/region counts. Boxed slot ACCESS only in round one, as planned — but repr stays - part of guard identity and the imms, so P4.5 flips only the + part of guard identity and the imms, so shapes-P5 flips only the emitter seam + typed-flow rules. *Gate results (2026-07-24):* matrix green (test-eir + new shape unit tests incl. hand-built attack IR for every verifier rule and @@ -593,7 +598,7 @@ revertable, runtime phases A/B-able against the old path. terminator when a shape named an atom no access ever interned — shapes now get their own init function, called right after literal init. -- [x] **P4.4 — Born with their shape.** DONE 2026-07-24. +- [x] **shapes-P4 — Born with their shape.** DONE 2026-07-24. PRECONDITION FIRST: the differential harness grew its shapes lane (maam submodule @d8610d3) — (a) per-allocation-site shape containment in the analysis worker (every concrete hidden class @@ -652,7 +657,7 @@ revertable, runtime phases A/B-able against the old path. - `EJS_NO_BORN_SHAPED` is the bisect hook; telemetry: `bornShaped=N ctorFills=N fenceDeclined=reason:n,...` (additive). - FOUND AT THE GATE: a pre-existing P4.3 proof-strength mismatch — + FOUND AT THE GATE: a pre-existing shapes-P3 proof-strength mismatch — optimize-guards' provenNumberAt proves const-number JOINS (`c ? 1 : 0`) and folds the has_tag over one, but the verifier's provenNumberIntrinsic didn't accept blockparams, so the uncovered @@ -673,12 +678,12 @@ revertable, runtime phases A/B-able against the old path. flag-off 6.76s ⇒ **3.3×** total, the new 1.5× step being the allocation batching: `ctorFills=1` covers the ctor in both the kern and alloc loops). -- [x] **P4.5 — Typed slots × specialization × GC (compiler half).** +- [x] **shapes-P5 — Typed slots × specialization × GC (compiler half).** DONE 2026-07-24. The gc-P5 half (trace bitmaps, inline slots, memcpy evacuation, barrier/trace elision) stays sequenced behind the mover per gc-plan; the compiler contract it needs was finished here. As built: - - **The seam flip** (the P4.3 plan, executed): `slot_load + - **The seam flip** (the shapes-P3 plan, executed): `slot_load repr:"f64"` produces a RAW f64 (lowering stamps `Inst.type`, boxes once at the fast exit — the join stays boxed since its slow edge is the generic get); `slot_store repr:"f64"` consumes a raw @@ -689,10 +694,10 @@ revertable, runtime phases A/B-able against the old path. repr immediate the way call_typed is typed by its callee (a per-op sig can't express either) — the verifier checks the result stamp against the repr and requires an f64-typed operand - for f64 stores. **The typed store dissolves P4.3's + for f64 stores. **The typed store dissolves shapes-P3's proof-strength hazard class**: the store's repr proof is now the operand TYPE, which no guard-folding can strip — - provenNumberIntrinsic (the P4.4 escape hatch that mirrored + provenNumberIntrinsic (the shapes-P4 escape hatch that mirrored optimizer folds) is deleted; boxed-repr stores keep the has_tag=false dominance rule. No off switch for the seam: it is a contract change the verifier owns. @@ -726,7 +731,7 @@ revertable, runtime phases A/B-able against the old path. never-first, and the measurements below show the guarded typed path already at parity with the trusted clone — there is currently nothing for unguardedness to win. Revisit only on - benchmark evidence (P4.6 discipline). + benchmark evidence (shapes-P6 discipline). - **Telemetry**: stats line grows `shapeTyped=loads:N,stores:M` (additive); EIR-opt debug line grows the het-merge count. *Gate results (2026-07-24):* matrix ×7 green (test-eir + new @@ -738,10 +743,10 @@ revertable, runtime phases A/B-able against the old path. repr-flip transition mid-kernel; boxed-field stores) node-identical in all modes incl. EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7. **Measured honestly**: types-bench2 total is UNCHANGED (2.04s vs - P4.4's 2.03s) because 1.71s of it is the allocation loop — the + shapes-P4's 2.03s) because 1.71s of it is the allocation loop — the gc-P5 half owns that. The kernel itself: a variable-receiver 20M-iteration kernel runs 0.31s under --types vs 3.28s flag-off - (10.6×), IDENTICAL between P4.4-boxed, P4.5-typed, fused, unfused, + (10.6×), IDENTICAL between shapes-P4-boxed, shapes-P5-typed, fused, unfused, and specialized — Apple-Silicon OoO + LLVM already hid the boxed round-trips, so the typed/fusion wall-time delta on this hardware is ~0. What the seam DOES buy today: an invariant-receiver kernel @@ -751,7 +756,7 @@ revertable, runtime phases A/B-able against the old path. guarded path reaches parity with the trusted P3.6 clone, and the IR meets gc-P5 with one addressing seam, slot-index immediates, and straight-line raw regions to point inline-slot addressing at. -- [x] **P4.6 — Measured extensions.** DONE 2026-07-24. The phase ran +- [x] **shapes-P6 — Measured extensions.** DONE 2026-07-24. The phase ran as its own discipline dictates: an evidence probe per candidate FIRST, implementation only where the numbers and a sound design both existed. Verdicts: @@ -774,10 +779,10 @@ revertable, runtime phases A/B-able against the old path. structural duplicates dedupe to mono), and propGet/propSet lower a guard CHAIN — the second has_shape tests on the first's miss edge, so each fast arm sits under its own same-block-fresh - fact and the verifier's P4.3/P4.5 rules apply per arm unchanged + fact and the verifier's shapes-P3/shapes-P5 rules apply per arm unchanged (typed f64 arms box at their own exits; stores split has_tag per arm, oriented by that arm's field repr). The mono path - emits byte-identical IR to P4.5. The optimizer's region/fold + emits byte-identical IR to shapes-P5. The optimizer's region/fold machinery is mono-strict and refuses chains wholesale (pinned: 4 guards survive `p.x + p.x` un-merged, module re-verifies) — chain-aware merging is future measured work, and wall time @@ -788,7 +793,7 @@ revertable, runtime phases A/B-able against the old path. receivers): chain **0.31s — parity with the monomorphic twin (0.32s)** — vs 1.67s declined (the bisect flag) and 3.64s flag-off: **5.4×** for the chain over the decline, and the - pre-P4.6 false-mono world's 0.99s (half the receivers missing + pre-shapes-P6 false-mono world's 0.99s (half the receivers missing the guard) is beaten 3.2×. Probe types-poly1 (both arms fast, typed stores per arm; cross-module repr-mismatched / third- shape / dictionary receivers all through the shared slow path) @@ -796,10 +801,10 @@ revertable, runtime phases A/B-able against the old path. - **Accessor inlining: DECLINED, evidence recorded.** The probe (defineProperty proto getter, 20M dispatches — getter LITERALS are still a maam NormalizeError) measures 2.31s under --types - vs 5.44s flag-off; the same arithmetic through P4.3 guarded + vs 5.44s flag-off; the same arithmetic through shapes-P3 guarded slots runs 0.32s, so ~7× headroom exists. But a receiver has_shape proves NOTHING about the proto that carries the - getter (accessor-bearing protos are dictionary-mode by P4.2 + getter (accessor-bearing protos are dictionary-mode by shapes-P2 design — mutable maps), so sound inlining needs proto-identity /proto-shape guard machinery plus maam-side accessor modeling that does not exist. That is new soundness surface, not a @@ -827,25 +832,25 @@ revertable, runtime phases A/B-able against the old path. built on the false-mono maam reports). types-bench2 (mono world) regression-checked bit-identical stats/output/wall-time. -P4.1/P4.2 are pure runtime and can proceed independently of maam; P4.3+ -are compiler phases in the P3 mold. gc-P1 and P4.1 share one atomic +shapes-P1/shapes-P2 are pure runtime and can proceed independently of maam; shapes-P3+ +are compiler phases in the P3 mold. gc-P1 and shapes-P1 share one atomic layout change whichever lands first. ## Risks, named -- **Dual-bookkeeping overhead (P4.1)** on shape-oblivious programs: one +- **Dual-bookkeeping overhead (shapes-P1)** on shape-oblivious programs: one transition-cache hit per property add, on every program. Measured at - the P4.1 gate with a hard <5% bar; the mitigation is that the + the shapes-P1 gate with a hard <5% bar; the mitigation is that the transition cache is one hash hit against an interned table vs the - map's existing hash+chain work, and P4.2 deletes the duplication. + map's existing hash+chain work, and shapes-P2 deletes the duplication. - **Shape explosion from type-aware transitions.** maam's answer (caps → megamorphic ⊤) transplants: per-object transition caps → dictionary, global table growth monitored; splay is the canary. Order-sensitive runtime shapes intern more than maam's order-insensitive ones — the order-canonicalization trick is NOT available at runtime (enumeration - order is semantics); the census (P4.1 gate) tells us the real fanout + order is semantics); the census (shapes-P1 gate) tells us the real fanout before any compiler work depends on it. -- **The effect-kill soundness class (P4.3).** Shape facts die at +- **The effect-kill soundness class (shapes-P3).** Shape facts die at WRITE|CALL effects; a missed kill is a silent miscompile of exactly the kind P3.4's adversarial review kept finding. It gets the same treatment: a written soundness inventory in optimize-guards, hand-built @@ -871,8 +876,8 @@ layout change whichever lands first. access.** Cheaper transitions, but every typed load keeps a `has_tag`+unbox and every guard proves less; maam already pays for type-aware classes and P3 built the raw-f64 world this feeds. The - premium of type-aware transitions is measured at P4.1 (census) before - P4.3 commits — if type-flip churn is pathological in real code, reprs + premium of type-aware transitions is measured at shapes-P1 (census) before + shapes-P3 commits — if type-flip churn is pathological in real code, reprs can degrade to `boxed` per-field without changing the design. - **Inline caches / PICs without static shapes.** A JIT's answer; AOT echojs has no code patching and DOES have an oracle. Module-init- @@ -886,18 +891,18 @@ layout change whichever lands first. patching compiled offsets; AOT has no second chance — this is why reprs are in the class identity, per maam's own design note. -## Open questions (tracked, not blocking P4.1/P4.2) +## Open questions (tracked, not blocking shapes-P1/shapes-P2) 1. **Ordered-shape witnesses from maam for constructors.** RESOLVED at - P4.3: maam's ShapeTable records each class's first-interning + shapes-P3: maam's ShapeTable records each class's first-interning insertion order (`fieldOrderOfShape`) — first-write program order along the first analyzed path, for literals AND constructors alike. A runtime object built in a different order interns a different runtime shape and simply misses the guard (slow path, never wrong). - P4.4's born-with-shape constructors may still prefer the fence's + shapes-P4's born-with-shape constructors may still prefer the fence's straight-line store prefix as the witness; decide there. 2. **Slot-array growth policy** (size classes vs exact + - copy-on-transition) — informed by the P4.1 census. + copy-on-transition) — informed by the shapes-P1 census. 3. **How much of `Array`/`Function`/module exotics join shaped mode later** — out of scope for P4.x entirely; plain objects first. 4. **`repr` lattice granularity** (`f64`/`boxed` vs finer `bool`/`str` @@ -909,22 +914,22 @@ layout change whichever lands first. allocation (born-shaped literals become bump-alloc clients), Phase 5 (consumes shapes for tracing/evacuation; this doc's Step B). - **maam-plan.md**: P4 checklist ticks "design doc" with this document; - P4.1+ items live HERE (this doc is the phase's checklist owner, the + shapes-P1+ items live HERE (this doc is the phase's checklist owner, the gc-plan pattern). The differential-harness shapes lane extends the P3.5 asset in the maam repo. - **plans.md escape analysis / allocation sinking**: sinking deletes - allocations shapes would otherwise accelerate — run the P4.1 census + allocations shapes would otherwise accelerate — run the shapes-P1 census with the optimizer ON (the gc-P0 lesson). ## Phase checklist (for /goal sessions) -- [x] **P4.1** runtime shape table + tracking, dual bookkeeping, header +- [x] **shapes-P1** runtime shape table + tracking, dual bookkeeping, header bits (joint with gc-P1), EJS_SHAPES=off, census instrumentation. Gate: matrix ×3, off-mode diff, <5% insert overhead, census recorded. DONE 2026-07-23 — see the phased-plan entry above for the numbers (2.1% insert overhead via the inlined transition memo). -- [x] **P4.2** slot storage + dictionary migration, specops mode-switch. +- [x] **shapes-P2** slot storage + dictionary migration, specops mode-switch. Gate: both-modes byte-identical suite+kangax, stress green, microbench recorded. DONE 2026-07-24 — see the phased-plan entry above (set 3.2×, get 1.09×, insert -3%; storm probe + gc-stress @@ -932,26 +937,26 @@ layout change whichever lands first. the stage2 GC lesson recorded there: shaped field cap 14 keeps slot arrays out of the LOS, and the gc trigger now scales with heap footprint). -- [x] **P4.3** EIR ops + verifier inventory + emitter + maam +- [x] **shapes-P3** EIR ops + verifier inventory + emitter + maam node-identity queries + guarded diamonds + shape facts in optimize-guards. Gate: matrix, lane 0-divergent, wrong-oracle probes, unit tests, types-bench2 delta. DONE 2026-07-24 — see the phased-plan entry above (types-bench2 2.1×, lane 459 files 0-divergent, all attack IR pinned at unit level). -- [x] **P4.4** born-with-shape (literals unconditional; constructors +- [x] **shapes-P4** born-with-shape (literals unconditional; constructors fenced). HARD PRECONDITION: harness shapes lane. Gate: harness + lane + probes + delta. DONE 2026-07-24 — see the phased-plan entry (harness shapes lane green, types-bench2 3.06s → 2.03s, ctor batching = the empty-shape-guarded body-side fill; no maam constructor query needed). -- [x] **P4.5** typed slots × clones × gc-P5 consumption (compiler half; +- [x] **shapes-P5** typed slots × clones × gc-P5 consumption (compiler half; gc-P5 consumption waits on the mover). Gate: typed delta measured and recorded, all lanes green. DONE 2026-07-24 — see the phased-plan entry above (raw f64 slot ops + heterogeneous region fusion; bench2 total unchanged at 2.04s because the residual is the alloc loop; invariant-receiver kernels now constant-fold; guarded path at parity with trusted clones). -- [x] **P4.6** measured extensions — evidence-gated, all four candidates +- [x] **shapes-P6** measured extensions — evidence-gated, all four candidates probed and measured. DONE 2026-07-24: 2-way poly guard chains LANDED (kernel 5.4× vs decline, mono parity; required the maam per-object terminal-filter fix — the false-mono finding); accessor diff --git a/docs/sinking-plan.md b/docs/sinking-plan.md index bf2fbf2e..abce760d 100644 --- a/docs/sinking-plan.md +++ b/docs/sinking-plan.md @@ -1,6 +1,10 @@ -# Allocation sinking: the shaped world (plans.md "the big one", continued) +# sinking-plan: escape analysis + allocation sinking -Status: S1 LANDED (2026-07-25) — see "S1 results" at the bottom. Owner doc for extending escape analysis + +Bucket plan; the ordering spine lives in `docs/plans.md`. Phase ids +here are `sinking-P#` (formerly S1/S2/S3 in this doc's first +revision). + +Status: sinking-P1 LANDED (2026-07-25) — see "sinking-P1 results" at the bottom. Owner doc for extending escape analysis + allocation sinking (docs/plans.md, optimization phase, first bullet) past what already exists. Written 2026-07-25, after gc-P2. @@ -38,7 +42,7 @@ the shaped world. ## Design -### S1 — shaped-literal sinking (statically sound) +### sinking-P1 — shaped-literal sinking (statically sound) Extend `sinkAllocations` to `make_object_shaped` candidates. A shaped allocation's shape is an immediate (`imms.shape` keyed into @@ -106,7 +110,7 @@ P3.6 specialization get their shot in the post-specialize `EJS_NO_EIR_OPT` mold). Telemetry: `shape_allocs_sunk` + `shape_guards_sunk` on the `EIR-opt:` line. -### S2 — constructor-result sinking (needs a runtime contract; NOT static) +### sinking-P2 — constructor-result sinking (needs a runtime contract; NOT static) The bench2 alloc loop is `new Point(i, i+1)` — a `construct` of a module-local born-shaped ctor. The tempting rewrite (virtualize the @@ -120,9 +124,9 @@ static transform**, and the reason deserves recording: > exactly why P4.4's born-with-shape kept the stores and guarded the > batched fill with a runtime `shaped_proto_intercepts` check rather > than eliding anything. Object literals don't have this problem -> (define semantics), which is why S1 is static and S2 is not. +> (define semantics), which is why sinking-P1 is static and sinking-P2 is not. -Sound path (designed here, sequenced after S1): **epoch-guarded +Sound path (designed here, sequenced after sinking-P1): **epoch-guarded sinking** — the deopt-free analogue of V8's speculative escape analysis. The runtime maintains a global accessor epoch (`_ejs_accessor_epoch`, bumped whenever an accessor property is @@ -139,7 +143,7 @@ The guard is one load + compare against the epoch observed at module init; the sunk arm saves two allocations, the fill, and the field-read dispatch. Accessor installation is rare in the corpus (P4.1 census: builtin-init dominated) but *not absent* — the epoch must be sampled -after builtin/module init, or kept per-shape-lineage. Additional S2 +after builtin/module init, or kept per-shape-lineage. Additional sinking-P2 conditions, all fail-closed: - ctor resolves through the P3.6 promoted-`%self`-slot machinery to a @@ -150,19 +154,19 @@ conditions, all fail-closed: values would require real inlining — decline in v1); - construct-site argument count equals formal count (missing-argument `undefined` would change the runtime-derived shape); -- result non-escaping under the S1 classifier; +- result non-escaping under the sinking-P1 classifier; - all-or-nothing per site: partial folding with a surviving construct is unsound (the surviving execution may be intercepted, diverging from folded reads). -S2 touches runtime (epoch maintenance), lowering (epoch_check op or a +sinking-P2 touches runtime (epoch maintenance), lowering (epoch_check op or a call_runtime), and the optimizer; it is its own gated step with its own differential evidence. Until then `new`-heavy loops keep their allocations — gc-P2's nursery makes that a bump-pointer + minor-GC cost rather than a free-list cost, which is the composition the two plans always intended. -### S3 — recorded, not scheduled +### sinking-P3 — recorded, not scheduled - Flow-sensitive field writes on sunk objects (SSA renaming per field; today any write declines the candidate). @@ -172,13 +176,13 @@ plans always intended. - `rest_args`/`args_obj` when only indexed or `.length`'d (plans.md rung 4). - Cross-function sinking via inlining heuristics beyond the current - single-block IIFE inliner (a multi-block inliner would let S2's + single-block IIFE inliner (a multi-block inliner would let sinking-P2's "fill operands are formals" restriction relax to arbitrary ctor prefixes). ## Gates -S1: unit tests (fold + refusal attacks: escaping uses, written +sinking-P1: unit tests (fold + refusal attacks: escaping uses, written fields, wrong-shape guards, non-number f64 operands folding false, prototype reads blocking removal, `===` identity, typeof); the existing suite byte-identical under `EJS_NO_SHAPED_SINK` vs default @@ -189,12 +193,12 @@ and gc-stress. Perf: a shaped-literal kernel (sink-probe2-style) should reduce to pure arithmetic — verify via `--dump-after eir-opt` and wall time. -S2 (when built): everything above plus epoch-bump coverage tests +sinking-P2 (when built): everything above plus epoch-bump coverage tests (accessor installed mid-loop → slow arm taken from that iteration on), and types-bench2 as the phase bench — target is the alloc() loop at kern parity (~0.3 s total, from 0.64 s). -## S1 results (2026-07-25) +## sinking-P1 results (2026-07-25) Implementation: `sinkShapedAlloc` in lib/eir/optimize.ts, wired into the existing `sinkAllocations` under the main fixpoint; guard branches @@ -226,6 +230,6 @@ lowering unchanged (shaped ops only exist under --types; the unreachable-block sweep now also prunes builder-era dead blocks in flag-off compiles — semantically inert, LLVM dropped them anyway). types-bench2 unchanged at 0.65 s as predicted (its allocations are the -S2 constructor case); the S1 payoff lands on non-escaping literal +sinking-P2 constructor case); the sinking-P1 payoff lands on non-escaping literal patterns — destructuring returns, options objects — throughout the suite and the compiler itself. diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index d59d92a1..5220489b 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -51,20 +51,20 @@ export type CollectResult = eir_module: Module; accessors: ModuleAccessor[]; diamonds: number; - // shapes-plan P4.3 telemetry (all zero/empty when --types is off) + // shape-guard telemetry (all zero/empty when --types is off) shape_sites: number; shape_guards: number; - // shapes-plan P4.6: 2-way polymorphic chains (subset of guards) + // 2-way polymorphic chains (subset of guards) shape_poly_guards: number; shape_declined: Record; - // shapes-plan P4.4: born-with-shape telemetry + // born-with-shape telemetry born_shaped: number; ctor_fills: number; fence_declined: Record; - // shapes-plan P4.5: typed (raw f64) slot accesses emitted + // typed (raw f64) slot accesses emitted typed_loads: number; typed_stores: number; - // Phase 3.6 (null when --types is off or nothing qualified) + // specialization stats (null when --types is off or nothing qualified) spec: SpecStats | null; error?: undefined; } @@ -403,7 +403,7 @@ export function collectEIRToplevel( module_infos: Map | null, this_module_info: ModuleInfo, options: CompilerOptions, - // Phase 3: the module's type oracle (null = no typed fast paths). + // the module's type oracle (null = no typed fast paths). // NB: normalizeDefaultExports below splices/retypes a few toplevel // statements AFTER the probe analyzed the tree — surviving nodes keep // their identity; nodes minted here read as oracle-unknown (-> top, @@ -439,7 +439,7 @@ export function collectEIRToplevel( module_infos: module_infos, oracle: oracle, typed_stats: typed_stats, - // --types-dump grows the per-site shape census (P4.3) + // --types-dump grows the per-site shape census shape_dump: !!options.types_dump, }; @@ -453,8 +453,8 @@ export function collectEIRToplevel( // testing: EJS_EIR_LOWTIER=1 swaps the bodies of the lowtier_* // probe functions (test/eir-lowtier1.js) for hand-built low-tier - // EIR, so the Phase 2 ops can be executed end to end before - // lowering emits them (Phase 3). Same mold as EJS_NO_EIR_OPT. + // EIR, so the low-tier ops can be executed end to end before + // lowering emits them. Same mold as EJS_NO_EIR_OPT. if (process.env["EJS_EIR_LOWTIER"]) { const n = injectLowTierProbes(eir_module); if (n > 0) verifyModule(eir_module); @@ -498,7 +498,7 @@ export function collectEIRToplevel( ); verifyModule(eir_module); - // Phase 3.6: function specialization. Runs AFTER the first + // function specialization. Runs AFTER the first // optimizer pass (EIR inlining has already taken the // single-block calls it can — a make_closure with no remaining // call uses is no longer a candidate) and only with an oracle diff --git a/lib/eir/ir.ts b/lib/eir/ir.ts index 351b74ad..3ee7be07 100644 --- a/lib/eir/ir.ts +++ b/lib/eir/ir.ts @@ -36,7 +36,7 @@ export interface PredEdge { targetIndex: number; } -// shapes-plan P4.3: one field of a module-interned guard shape, in +// one field of a module-interned guard shape, in // insertion (transition-chain) order. repr mirrors the runtime's // EJSShapeRepr and is part of shape identity. export interface ShapeField { @@ -53,7 +53,7 @@ export function shapeKeyOf(fields: readonly ShapeField[]): string { export class Module { name: string; functions: Func[] = []; - // shapes-plan P4.3: the guard shapes this module interns at init + // the guard shapes this module interns at init // (imms.shape key -> ordered fields). The verifier checks slot // bounds/reprs against this; the emitter mints one global + one // _ejs_shape_intern call per entry (the atom-table precedent). @@ -77,7 +77,7 @@ export class Module { } } -// Phase 3.6: a specialized clone's typed signature. `formals` types the +// a specialized clone's typed signature. `formals` types the // JS formal parameters only (entry params [0]=%env and [1]=%this stay // boxed/implicit; a clone's %this is required-unused by the static callee // checks). This is the second controlled lift of the P2 @@ -218,8 +218,8 @@ export class Inst { // catch blocks' first param is the caught exception isException = false; removed = false; - // Phase 3.4 pass (b): a block parameter that carries a RAW f64 across - // its incoming edges — the controlled lift of the Phase 2 + // the raw-join pass: a block parameter that carries a RAW f64 across + // its incoming edges — the controlled lift of the // raw-values-cannot-cross-blocks rule. Set only by the optimizer // (optimize-guards.ts rawJoinParams); lowering must never set it, so // every lowering-created edge keeps the strict boxed rule. The diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index 9a7ab58d..ff3a9442 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -53,9 +53,9 @@ export interface ModCtx { refs: Map; this_module_info?: ModuleInfo | null; module_infos?: Map | null; - // Phase 3: the per-module type oracle (null/absent = no typed fast + // the per-module type oracle (null/absent = no typed fast // paths, today's lowering exactly) and the module-wide stats the - // lowered functions accumulate into. shapes-plan P4.3 adds the shape + // lowered functions accumulate into. the shape-guard lowering adds the shape // telemetry: sites = atom property accesses that consulted the oracle, // guards = shape diamonds emitted, declined = counted reasons // (promotion criterion 5 — visible degradation). @@ -65,29 +65,29 @@ export interface ModCtx { trusted?: number; shape_sites?: number; shape_guards?: number; - // shapes-plan P4.6: sites guarded with the 2-way polymorphic + // sites guarded with the 2-way polymorphic // chain (a subset of shape_guards) shape_poly_guards?: number; shape_declined?: Record; - // shapes-plan P4.4: born-with-shape telemetry — literal sites + // born-with-shape telemetry — literal sites // batched into make_object_shaped, constructor prefixes batched // into fill_object_shaped diamonds, and counted fence declines born_shaped?: number; ctor_fills?: number; fence_declined?: Record; - // shapes-plan P4.5: typed (raw f64) slot accesses emitted + // typed (raw f64) slot accesses emitted typed_loads?: number; typed_stores?: number; }; - // --types-dump: per-site shape census lines (shapes-plan P4.3) + // --types-dump: per-site shape census lines shape_dump?: boolean; } -// Phase 3.6: clone-lowering mode (specialize.ts). The clone gets an +// clone-lowering mode (specialize.ts). The clone gets an // unboxed signature (f64 formals, boxed once at entry) and lowers // oracle-number arithmetic UNGUARDED — no diamonds, no slow paths. // This is the phase's deliberate unguarded-consumption line: oracle -// claims become facts, backed by the P3.5 differential harness and by +// claims become facts, backed by the differential harness and by // the escape analysis that gates which functions are cloned at all. export interface SpecMode { cloneName: string; @@ -100,7 +100,7 @@ export interface SpecMode { result: "any" | "f64"; } -// shapes-plan P4.4: the runtime's shaped field-count ceiling +// the runtime's shaped field-count ceiling // (EJS_SHAPE_FIELD_CAP_MAX in runtime/ejs-shapes.h) — born-shaped sites // beyond it would only ever take the runtime's sequential fallback, so // they keep today's lowering @@ -125,7 +125,7 @@ interface FinallyCtx { handlerDepth: number; } -// the Phase 3 typed fast path: source operator -> low-tier f64 op +// the typed fast path: source operator -> low-tier f64 op const f64ops: Record = { "+": "f64_add", "-": "f64_sub", @@ -203,9 +203,9 @@ class LowerFunction { // crossed finalizer at the exit site (finalizer duplication). finallyCtx: FinallyCtx[] = []; curEnv: Inst; - // Phase 3: the module's type oracle (null = no typed fast paths) + // the module's type oracle (null = no typed fast paths) oracle: TypeOracle | null; - // Phase 3.6: non-null when lowering a specialized clone + // non-null when lowering a specialized clone spec: SpecMode | null; constructor( @@ -231,7 +231,7 @@ class LowerFunction { this.envParam = this.b.fn.entry!.params[0]!; this.thisParam = this.b.fn.entry!.params[1]!; - // Phase 3.6 clone entry: f64 formals arrive raw and re-enter the + // specialized-clone entry: f64 formals arrive raw and re-enter the // boxed world exactly once, right here; the body then lowers // against the boxed value like any other binding. (box_f64 is // also the optimizer's value-intrinsic number proof, so any @@ -571,7 +571,7 @@ class LowerFunction { ); values.push(this.expr(p.value as e.Expression)); } - // shapes-plan P4.4: a statically-keyed literal is born + // a statically-keyed literal is born // with its shape — key order and count are the site's // static truth, no oracle fact needed (the runtime // derives true reprs from the actual values and falls @@ -763,7 +763,7 @@ class LowerFunction { if (!op) throw LowerNotSupported(`binary operator ${n.operator}`, n.loc); let l = this.expr(n.left); let r = this.expr(n.right); - // Phase 3: born-typed guarded arithmetic. When the oracle types + // born-typed guarded arithmetic. When the oracle types // BOTH operands as exactly {number}, split the same diamond shape // logical() uses: has_tag guards -> fast unbox/f64 op/box vs the // generic slow op, rejoining in a boxed block param. Guarded @@ -771,9 +771,9 @@ class LowerFunction { // has_tag guards decide at runtime; only code size/speed change. const f64op = f64ops[n.operator]; if (f64op && this.operandIsNumber(n.left) && this.operandIsNumber(n.right)) { - // Phase 3.6 clone bodies consume the oracle UNGUARDED: no + // specialized-clone bodies consume the oracle UNGUARDED: no // diamond, no slow path — unbox, compute, re-box. Everywhere - // else the Phase 3 guarded diamond stands. + // else the guarded diamond stands. if (this.spec) return this.trustedNumeric(f64op, l, r); return this.numericDiamond(f64op, op, l, r); } @@ -880,7 +880,7 @@ class LowerFunction { return result; } - // --- shapes-plan P4.3: shape-guarded property access --------------------- + // --- shape-guarded property access --------------------- // // The promotion policy (criteria 1/2 of the plan): a diamond is emitted // only for an EXACT receiver-shape fact — monomorphic, non-megamorphic, @@ -910,12 +910,12 @@ class LowerFunction { } // the exact shape facts for accessing `atom` on the value of `objNode` - // — one fact per oracle shape (two = the P4.6 polymorphic chain), or + // — one fact per oracle shape (two = the polymorphic chain), or // null (with the decline counted) when anything is short of exact. // Every shape in a multi-shape answer must carry the field: a shape // that lacks it would need the fast arm to run proto-lookup semantics, // which only the generic path performs (criterion 2 — no near-misses). - // EJS_NO_POLY_SHAPE_GUARDS=1 is the P4.6 bisect hook: 2-shape sites + // EJS_NO_POLY_SHAPE_GUARDS=1 bisects polymorphic chains: 2-shape sites // decline "polymorphic" exactly as they did before the extension. shapeFactFor( objNode: e.Expression | null, @@ -962,8 +962,8 @@ class LowerFunction { // obj.atom: a has_shape chain whose fast arms are fixed-slot loads and // whose shared slow arm is today's generic get — the numericDiamond - // skeleton with one guard per exact fact. One fact is the P4.3 mono - // diamond exactly; two facts (the P4.6 polymorphic extension) test the + // skeleton with one guard per exact fact. One fact is the mono + // diamond exactly; two facts (the polymorphic extension) test the // second shape on the first guard's miss edge, so each fast arm sits // under its own same-block-fresh has_shape fact and the verifier's // rules apply per arm unchanged. @@ -992,7 +992,7 @@ class LowerFunction { this.b.setInsertPoint(fast_bbs[i]!); const v = this.b.emit("slot_load", [obj], { shape: f.key, slot: f.slot, repr: f.repr }); if (f.repr === "f64") { - // P4.5 typed slots: the load produces a raw f64 (the guard + // typed slots: the load produces a raw f64 (the guard // proved the repr; the slot bytes ARE the double). Box once at // the fast exit — the join stays boxed (its slow edge is the // generic get), and the optimizer's region fusion + rawJoin @@ -1030,7 +1030,7 @@ class LowerFunction { } // per-fact tag+fast pair (mono creation order preserved: tag, - // fast, slow, join), then the P4.6 chain blocks + // fast, slow, join), then the chain blocks const tag_bbs = facts.map(() => this.b.newBlock("shape_settag")); const fast_bbs = facts.map(() => this.b.newBlock("shape_setfast")); const chk_bbs = facts.slice(1).map(() => this.b.newBlock("shape_setchk")); @@ -1059,7 +1059,7 @@ class LowerFunction { const f = facts[i]!; this.b.setInsertPoint(fast_bbs[i]!); if (f.repr === "f64") { - // P4.5 typed slots: unbox under the has_tag guard (the true + // typed slots: unbox under the has_tag guard (the true // edge into this block proved v is a number, so the bits are // the double) and store raw — the type system carries the // repr proof the verifier's store rule now requires. @@ -1081,12 +1081,12 @@ class LowerFunction { this.b.setInsertPoint(join_bb); } - // --- shapes-plan P4.4: the fenced constructor prefix --------------------- + // --- the fenced constructor prefix --------------------- // // Detect the maximal leading run of `this. = ` // statements in a plain function body and batch it into ONE guarded // fill_object_shaped diamond. The fence is structural and oracle-free - // (the P3.6 discipline — a lying oracle cannot make this wrong): + // (the specialization discipline — a lying oracle cannot make this wrong): // // - plain function, not an arrow (whose `this` is lexical), not the // toplevel, not a specialization clone; @@ -1700,7 +1700,7 @@ class LowerFunction { if (this.finallyCtx.length > 0) { if (this.runFinalizers(0)) return; // a finalizer overrode control } - // Phase 3.6 clone with an f64 result: return the raw f64 + // specialized clone with an f64 result: return the raw f64 // (unguarded unbox — the same trust as trustedNumeric). // A return this can't prove leaves a boxed return that the // structural post-check in specialize.ts rejects, so a @@ -2275,7 +2275,7 @@ function lowerOneFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, info.lowered = true; let lf = new LowerFunction(info, analysis, module, mod_ctx); if (info.node.body.type === "BlockStatement") { - // shapes-plan P4.4: a fenced constructor's leading this-store run + // a fenced constructor's leading this-store run // batches into one guarded fill; the remaining statements lower // exactly as the BlockStatement case would have const skip = lf.lowerBornShapedCtorPrefix(info.node.body); @@ -2293,7 +2293,7 @@ function lowerOneFunction(info: FnInfo, analysis: ScopeAnalysis, module: Module, return info.fn; } -// Phase 3.6: lower a specialized clone of an already-lowered function. +// lower a specialized clone of an already-lowered function. // Unlike lowerOneFunction this ignores info.lowered/info.fn (the generic // lowering stands), gives the Func the clone's name and typed sig, and // lowers oracle-number arithmetic unguarded (SpecMode). Children were diff --git a/lib/eir/lowtier-probe.ts b/lib/eir/lowtier-probe.ts index 7421f15f..b507408c 100644 --- a/lib/eir/lowtier-probe.ts +++ b/lib/eir/lowtier-probe.ts @@ -2,15 +2,15 @@ * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// Hand-built low-tier bodies for the Phase 2 end-to-end test. Lowering does -// not emit has_tag/unbox_f64/f64_*/box_f64 yet (that's Phase 3), so to prove +// Hand-built low-tier bodies for the low-tier end-to-end test. Lowering does +// does emit has_tag/unbox_f64/f64_*/box_f64 through the oracle path, but to prove // the emitted machine code is correct we substitute known bodies into the // functions of test/eir-lowtier1.js, gated on EJS_EIR_LOWTIER=1 (a debug/test // hook in the EJS_NO_EIR_OPT mold). With the variable unset nothing here // runs; the test file behaves identically either way, so it also passes in // the normal matrix. // -// The shape built here is exactly the Phase 3 guarded diamond: has_tag both +// The shape built here is exactly the guarded diamond: has_tag both // operands -> fast block (unbox / f64 op / box) vs slow block (the generic // op), joining in a BOXED block parameter (raw f64/i1 never crosses a block // boundary; the verifier enforces that). diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 6b468a48..444b5f6d 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -117,7 +117,7 @@ export const OPS = { // call: [callee, this, ...args], or with imms.direct set (a direct // call to a known EIR function): [env, this, ...args] call: { arity: -1, effects: GENERIC_OP, may_terminate: true, imms: ["direct"] }, - // Phase 3.6: imms.direct's typed sibling — a direct call to a + // imms.direct's typed sibling — a direct call to a // specialized clone (imms.fn) with an unboxed signature. operands = // [env, ...args] where each arg slot's type must match the callee // Func.sig's formal ("f64" formals take raw f64 values); no `this` @@ -184,7 +184,7 @@ export const OPS = { // (mirrors LLVMIRVisitor.isNumber, inheriting its per-target check) has_tag: { arity: 1, effects: E.NONE, imms: ["tag"], sig: { params: ["ejsval"], result: "i1" } }, - // --- shapes (shapes-plan P4.3) ---------------------------------------------- + // --- shapes ---------------------------------------------- // i1: does the operand's header shape index equal the module-interned // shape? imms.shape keys Module.shapes (the ordered field list the // module interns at init, like atoms); the emitter folds the NaN-box @@ -194,7 +194,7 @@ export const OPS = { // fixed-slot access on a shape-guarded receiver. imms.shape/imms.slot // name the guarded shape and the field index within it (the shape imm // repeats the guard's so the verifier compares instead of infers); - // imms.repr is the FIELD's shape repr ("boxed" | "f64"). P4.5 typed + // imms.repr is the FIELD's shape repr ("boxed" | "f64"). Typed // slots: repr:"f64" produces (slot_load) / consumes (slot_store) a RAW // f64 under the P2 typed-flow rules — sound because the guard proved // the field's repr, the shaped-world invariant "shape reprs describe @@ -215,7 +215,7 @@ export const OPS = { // transition. slot_load: { arity: 1, effects: E.READ, imms: ["shape", "slot", "repr"] }, slot_store: { arity: 2, effects: E.WRITE, imms: ["shape", "slot", "repr"] }, - // --- born with their shape (shapes-plan P4.4) ----------------------------- + // --- born with their shape ----------------------------- // a statically-keyed object literal, allocated + installed in one // runtime call: operands are the initial field values in imms.shape's // field order. The runtime re-derives the true shape from the actual diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index a00146d7..71ce15c7 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -2,7 +2,7 @@ * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// Phase 3.4: trust-free optimizer passes over the Phase 3 guarded +// trust-free optimizer passes over the guarded // arithmetic diamonds (lower.ts numericDiamond). // // (a) dominated-guard elimination + guard-region merging: a has_tag @@ -758,7 +758,7 @@ function tryMergeAt(fn: Func, r1: GuardRegion, idom: Map, stats: O export function rawJoinParams(fn: Func, stats: OptStats): boolean { // candidates: non-entry, non-catch params whose every incoming arg is - // a box_f64, an f64 value, a number constant (Phase 3.6: converted to + // a box_f64, an f64 value, a number constant (converted to // a raw f64_const on the edge — a loop accumulator seeded `x = 0` // now qualifies), itself, or another candidate param const isNumConst = (v: Inst) => v.op === "const" && v.imms["kind"] === "number"; @@ -993,7 +993,7 @@ export function rawJoinParams(fn: Func, stats: OptStats): boolean { // // threads each constant edge straight to the cond_br successor it would // pick (to_boolean(const true/false) is exact), so the fast arm of an -// f64_lt diamond — and a Phase 3.6 clone's trusted compare — branches on +// f64_lt diamond — and a specialized clone's trusted compare — branches on // the raw i1 with no boxed-boolean round-trip (and no _ejs_truthy call) // left in the loop. Trust-free: constants only. Non-constant edges (a // diamond's generic slow arm) keep the join and the re-test. @@ -1043,14 +1043,14 @@ export function threadBooleanJoins(fn: Func, stats: OptStats): boolean { return changed; } -// --- shapes-plan P4.3: shape-guard regions ------------------------------------ +// --- shape-guard regions ------------------------------------ // // The shape twins of pass (a): consecutive GET diamonds on the same // receiver and shape merge into one guard region with one slow path, and // guards proven by an un-killed dominating shape fact fold. All facts // come from verifier.ts's computeShapeFacts — the same engine the // verifier re-checks the result with, so a fold or merge this pass gets -// wrong is IR the verifier rejects (trust-free, the P3.4 discipline). +// wrong is IR the verifier rejects (trust-free, the raw-join discipline). // // ---- Soundness inventory (the shape additions) ---- // @@ -1086,7 +1086,7 @@ export function threadBooleanJoins(fn: Func, stats: OptStats): boolean { // of j1-defined values through j2 with raw-type refusal) is the // numeric merge's argument verbatim. // -// ---- P4.5 typed slots: the mixed region and the heterogeneous merge ---- +// ---- typed slots: the mixed region and the heterogeneous merge ---- // // - An f64-repr slot_load produces a raw f64 and lowering boxes it at // the fast exit, so a shape region's fast side now also carries @@ -1094,7 +1094,7 @@ export function threadBooleanJoins(fn: Func, stats: OptStats): boolean { // numeric machinery moved in. The shape matcher therefore admits the // numeric whitelist in its SLOW chain too (the generic ops are the // slow rendition of that arithmetic), and the twin check pairs BOTH -// populations: slot_loads with gets (atom == field-at-slot, the P4.3 +// populations: slot_loads with gets (atom == field-at-slot, the twin // rule) and f64 ops with generic ops (operand correspondence through // the box/unbox mapping, the numeric rule verbatim). A box_f64 of an // f64 slot_load corresponds to that load's paired get: the NaN-box @@ -1122,13 +1122,13 @@ interface ShapeRegion { fastBlocks: Set; fastChain: Block[]; // linear br chain, entry..exit fastLoads: Inst[]; // slot_loads in chain order - fastArith: Inst[]; // P4.5: f64 arithmetic in chain order (post-merge) + fastArith: Inst[]; // f64 arithmetic in chain order (post-merge) fastExitEdge: EdgeRef; slowEntry: Block; slowChain: Block[]; slowSet: Set; slowGets: Inst[]; // get_prop_atom in chain order - slowArith: Inst[]; // P4.5: whitelisted generic ops in chain order + slowArith: Inst[]; // whitelisted generic ops in chain order slowExitEdge: EdgeRef; join: Block; } @@ -1151,7 +1151,7 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { if (t0.block === slowEntry) return null; // --- slow side: the numeric matcher's linear chain, with - // get_prop_atom(recv) — and, P4.5, the numeric whitelist ops (the + // get_prop_atom(recv) — and the numeric whitelist ops (the // generic rendition of merged-in f64 arithmetic) — as the admitted // effectful ops const slowChain: Block[] = []; @@ -1287,7 +1287,7 @@ function matchShapeRegionAt(head: Block): ShapeRegion | null { // the slow chain is the generic rendition of the fast side: slot_loads and // gets pair op for op (atom == the shape's field at that slot), f64 // arithmetic and generic ops pair op for op with corresponding operands -// (P4.5, the numeric twin rule), and the join-exit arguments correspond +// (the numeric twin rule), and the join-exit arguments correspond // slot for slot. A box_f64 of an f64 slot_load corresponds to the load's // paired get: doubles are stored raw in the NaN-box, so the get returns // exactly the boxed rendition of the load's raw double. @@ -1376,7 +1376,7 @@ function verifyShapeTwin(r: ShapeRegion, shapes: Map): boo // Re-executing r1's slow chain (a merged region's guard failures reroute // through it) is sound when every instruction is effect-free, a get of an // own field of the guarded shape (pure and bit-identical while the -// receiver still has shape S — the fast side is kill-free), or (P4.5) a +// receiver still has shape S — the fast side is kill-free), or a // whitelisted generic op each of whose operands is proven-number at r1's // fast exit or is one of r1's own paired gets naming an f64-REPR field — // an f64 slot holds a number by the shaped-world invariant, so the @@ -1563,7 +1563,7 @@ function tryMergeShapeAt( return true; } -// P4.5: the heterogeneous merge — a NUMERIC guard region headed at a +// the heterogeneous merge — a NUMERIC guard region headed at a // shape region's join merges into the shape region, exactly as a second // shape region would: r2's has_tag failures reroute to r1's slow entry // (r1's slow chain re-executes — checkShapeSlowReexec — then falls @@ -1778,9 +1778,9 @@ export function optimizeShapeRegions( sweepUnreachableBlocks(fn); - // P4.5 bisect hook (criterion 6): EJS_NO_SHAPE_FUSION disables the + // EJS_NO_SHAPE_FUSION disables the // heterogeneous merge + the in-loop numeric folding, leaving exactly - // the P4.3 shape-region behavior (typed slot ACCESS is a contract + // the plain shape-region behavior (typed slot ACCESS is a contract // change and has no off switch — the verifier owns it). const noFusion = !!process.env["EJS_NO_SHAPE_FUSION"]; let changedAny = false; @@ -1807,7 +1807,7 @@ export function optimizeShapeRegions( } } if (foldProvenShapeGuards(fn, stats)) changed = true; - // P4.5: a heterogeneous merge leaves r2's has_tag guards fed only + // a heterogeneous merge leaves r2's has_tag guards fed only // by fast-side box_f64 values — provably numbers. Folding them // here linearizes the fast side so the NEXT round's matcher can // grow the region further (the fusion cascade). diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 948455f3..952cad22 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -37,20 +37,20 @@ export interface OptStats { calls_inlined: number; iters_folded: number; dead_removed: number; - // Phase 3.4 guard-region passes (optimize-guards.ts) + // guard-region passes (optimize-guards.ts) guards_folded: number; regions_merged: number; raw_join_params: number; - // shapes-plan P4.3: shape-guard region passes + // shape-guard region passes shape_guards_folded: number; shape_regions_merged: number; - // shapes-plan P4.5: heterogeneous (shape + numeric) region merges + // heterogeneous (shape + numeric) region merges shape_numeric_merged: number; - // Phase 3.6: unbox_f64(box_f64(x)) round-trips annihilated + // unbox_f64(box_f64(x)) round-trips annihilated unbox_folds: number; - // Phase 3.6: constant edges threaded past boxed-boolean re-tests + // constant edges threaded past boxed-boolean re-tests joins_threaded: number; - // sinking-plan S1: non-escaping make_object_shaped scalar-replaced, + // non-escaping make_object_shaped scalar-replaced, // and the shape guards on them resolved statically shape_allocs_sunk: number; shape_guards_sunk: number; @@ -285,7 +285,7 @@ function sinkAlloc(useMap: UseMap, fn: Func, alloc: Inst, stats: OptStats): bool return changed; } -// --- shaped-literal sinking (sinking-plan S1) ------------------------------ +// --- shaped-literal sinking ------------------------------ // // make_object_shaped carries its field values as operands (shape field // order, boxed) and its shape as an immediate — there are no @@ -759,7 +759,7 @@ function foldIteratorWrappers(useMap: UseMap, fn: Func, stats: OptStats): boolea // number, so the round-trip is the identity (modulo NaN canonicalization, // which JS semantics cannot observe — a non-canonical NaN payload only // ever flows into f64 ops, where any NaN behaves alike, or into a later -// box_f64, which canonicalizes). Phase 3.6 clones lean on this: formals +// box_f64, which canonicalizes). specialized clones lean on this: formals // are boxed once at entry and trusted arithmetic re-unboxes them. function foldUnboxOfBox(fn: Func, stats: OptStats): boolean { const boxFolds: Inst[] = []; @@ -866,14 +866,14 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; } - // Phase 3.4: guard-region passes over the --types diamonds. They run + // guard-region passes over the --types diamonds. They run // after the general fixpoint (env scalarization has exposed the SSA // values the diamonds guard) and bail immediately when lowering // emitted no number guards — every flag-off compile. if (optimizeGuardRegions(fn, s)) eliminateDead(fn, s); - // shapes-plan P4.3: shape-guard region merging + fact folding (bails + // shape-guard region merging + fact folding (bails // immediately without has_shape guards — every flag-off compile). - // P4.5: a short fixpoint with rawJoinParams — heterogeneous merges + // a short fixpoint with rawJoinParams — heterogeneous merges // expose raw joins, and a raw join linearizes a fast side the next // shape-region match can grow through. for (let i = 0; i < 8; i++) { @@ -888,7 +888,7 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O } if (!ch) break; } - // Phase 3.6 cleanups. These run AFTER the guard-region passes: the + // unbox/boolean-join cleanups. These run AFTER the guard-region passes: the // merge machinery pattern-matches diamond fast arms (unbox of the // guarded value / of a literal const), so annihilating round-trips // or rewriting const unboxes earlier would refuse valid merges. diff --git a/lib/eir/oracle.ts b/lib/eir/oracle.ts index ba3180d5..0e662ab5 100644 --- a/lib/eir/oracle.ts +++ b/lib/eir/oracle.ts @@ -2,12 +2,12 @@ * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// The MAAM type oracle (docs/maam-plan.md). With --types on, compile() +// The MAAM type oracle. With --types on, compile() // hands us the desugared toplevel BEFORE collectEIRToplevel consumes it; // we wrap its body as a Program (preserving node identity — the oracle // is keyed on the exact node objects), run the echojs-maam abstract -// interpreter over it, log its stats, and (Phase 1) return a TypeOracle -// over the result. Nothing in codegen consumes it yet (Phase 3); +// interpreter over it, log its stats, and return a TypeOracle +// over the result. Lowering consumes it only under --types; // --types-dump prints per-binding types for hand-checking. // // Two hard rules, both load-bearing: @@ -51,10 +51,10 @@ interface MaamResult { metrics: MaamMetrics; describe(): string; warnings(): Array<{ kind: string }>; - // Phase 1 node-identity oracle: joined TypeSig ("num", "num|str", "⊤", …) + // node-identity oracle: joined TypeSig ("num", "num|str", "⊤", …) // for the exact node object, undefined for unreached/unmapped nodes. typeOfNode(n: unknown): string | undefined; - // shapes-plan P4.3 node-identity shape queries; absent in older maam + // node-identity shape queries; absent in older maam // builds (the oracle degrades to "no shape facts", never errors) receiverShapesOfNode?(n: unknown): MaamShape[] | undefined; fieldOrderOfShape?(s: MaamShape): readonly string[] | undefined; @@ -131,7 +131,7 @@ function warningSummary(warnings: Array<{ kind: string }>): string { return [...counts.entries()].map(([kind, n]) => `${kind}:${n}`).join(","); } -// --- the TypeOracle contract (docs/maam-plan.md, "The interface contract") -- +// --- the TypeOracle contract -- export type TypeTag = "number" | "string" | "boolean" | "undefined" | "null" | "object" | "closure"; @@ -140,7 +140,7 @@ export interface EirType { tags: ReadonlySet | "top"; } -// shapes-plan P4.3: one field of a receiver's shape, in insertion order. +// one field of a receiver's shape, in insertion order. // repr mirrors the runtime's EJSShapeRepr: "f64" iff the field's TypeSig is // exactly "num" (the runtime classifies stored values the same way), else // "boxed" — and a sig whose union straddles the num/non-num line has no @@ -160,7 +160,7 @@ export type ShapeDeclineReason = | "no-order" // no ordered witness for the shape | "empty"; // the empty shape (nothing to access) -// shapes-plan P4.6: a query answer carries ONE OR TWO exact shapes. Two +// a query answer carries ONE OR TWO exact shapes. Two // shapes is the measured 2-way polymorphic extension — every shape in the // answer independently passes the full exactness screen (non-megamorphic, // non-empty, ordered witness, single-tag reprs); a set where ANY member @@ -174,10 +174,10 @@ export interface TypeOracle { // type of the value an expression node evaluates to (join over all // reached contexts); "top" when unknown/unanalyzed typeOfNode(n: e.Node): EirType; - // shapes-plan P4.3/P4.6: the receiver-shape facts for a property + // the receiver-shape facts for a property // access's object node — exact facts only (non-megamorphic, uncapped, // all reprs single-tag, ordered witness present), at most two shapes - // (the P4.6 poly budget), everything else a counted decline. + // (the polymorphic-chain budget), everything else a counted decline. // Optional so stub oracles predating shapes keep working; absent = // no shape facts. receiverShapeOfNode?(n: e.Node): ShapeQuery; @@ -367,7 +367,7 @@ function dumpBindingTypes( // post-pre_eir_convert Program whose body[0] is the synthetic toplevel // FunctionDeclaration (insert_toplevel_func) holding the module's // statements. Returns a TypeOracle over the analysis (so compile() can -// thread it onward — Phase 3), or null when anything degraded; callers +// thread it onward), or null when anything degraded; callers // must treat null as "no type information", never as an error. export function runTypeAnalysisProbe( tree: e.Program, @@ -416,9 +416,9 @@ export function runTypeAnalysisProbe( if (sig === undefined) stats.unknown++; return typeSigToEirType(sig); }, - // shapes-plan P4.3/P4.6: exact receiver-shape facts, every + // exact receiver-shape facts, every // near-miss a counted decline (promotion criterion 2 — no - // near-misses). Up to TWO shapes survive (the P4.6 poly + // near-misses). Up to TWO shapes survive (the poly // budget); each must pass the full screen independently. receiverShapeOfNode: (n): ShapeQuery => { if (!result.receiverShapesOfNode || !result.fieldOrderOfShape) diff --git a/lib/eir/printer.ts b/lib/eir/printer.ts index 229202b0..3b90849d 100644 --- a/lib/eir/printer.ts +++ b/lib/eir/printer.ts @@ -37,7 +37,7 @@ export function printFunction(fn: Func): string { const lines: string[] = []; const header_params = fn.entry ? fn.entry.params.map((p) => `${nameOf(p)}: ${p.type}`) : []; - // sigged clones (Phase 3.6) print their result type; un-sigged + // sigged clones print their result type; un-sigged // functions keep the existing byte-identical header const result = fn.sig && fn.sig.result !== "any" ? `: ${fn.sig.result}` : ""; lines.push(`fn @${fn.name}(${header_params.join(", ")})${result} {`); diff --git a/lib/eir/specialize.ts b/lib/eir/specialize.ts index d8791cec..887a636b 100644 --- a/lib/eir/specialize.ts +++ b/lib/eir/specialize.ts @@ -2,18 +2,17 @@ * vim: set ts=4 sw=4 et tw=99 ft=typescript: */ -// Phase 3.6: typed calling convention / function specialization -// (docs/maam-plan.md). For a function with a LOCAL CLOSED WORLD — its +// typed calling convention / function specialization. For a function with a LOCAL CLOSED WORLD — its // closure value never escapes and every call site is enumerated // in-module — emit a specialized clone with an unboxed signature // (f64 formals, f64 result), rewrite the provably-known call sites to // direct calls that unbox at the caller, and never emit the slow paths // in the clone at all (SpecMode lowering). // -// The trust story crosses the Phase 3 guarded line ON PURPOSE: oracle +// The trust story crosses the guarded line ON PURPOSE: oracle // claims become facts inside the clone and at rewritten call sites. // What keeps that honest: -// - the P3.5 differential harness (hard precondition) validates the +// - the differential harness (hard precondition) validates the // oracle's abstraction against concrete execution; // - the escape analysis here is COMPILER-side and structural (operand // flow over lowered EIR) — it does not consult the oracle, so a diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 1fac0245..df986354 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -1024,7 +1024,7 @@ test("optimize: DCE removes unused pure chains but keeps effects", () => { assertContains(printed, "get_prop_atom"); }); -// --- the typed low tier (Phase 2) ------------------------------------------------ +// --- the typed low tier ------------------------------------------------ function assertVerifyFails(fn: Func, needle: string): void { try { @@ -1151,7 +1151,7 @@ test("lowtier: DCE removes dead pure low-tier chains", () => { assertNotContains(printed, "unbox_f64"); }); -// --- Phase 3: oracle-guided guarded arithmetic ------------------------------------ +// --- oracle-guided guarded arithmetic ------------------------------------ // a hand-built TypeOracle: types Identifier nodes by name, everything else // (and unknown names) is top. The TypeOracle interface from Chunk G is @@ -1265,7 +1265,7 @@ test("typed-arith: mul/div diamonds carry their ops", () => { } }); -// --- Phase 3.4: guard-region merging + raw f64 joins ------------------------------ +// --- guard-region merging + raw f64 joins ------------------------------ // like the real maam oracle, this types the named identifiers as // {number} AND any arithmetic expression whose operands are typed — @@ -1327,7 +1327,7 @@ test("guard-fold: x * x re-tests x only once", () => { }); test("guard-merge: hypot2 becomes one guard region with one slow path", () => { - // as lowered this is three diamonds / six has_tags (see the Phase 3 + // as lowered this is three diamonds / six has_tags (see the guarded-arithmetic // dump); merged: one has_tag per distinct value, one slow path const { fn } = lowerOptWithOracle( "function hypot2(a, b) { return a * a + b * b; }", @@ -1699,7 +1699,7 @@ test("verifier: a boxed arg into a rawJoin f64 param is rejected", () => { assertVerifyFails(fb.finish(), "f64 param"); }); -// --- Phase 3.6: typed calling convention / function specialization --------------- +// --- typed calling convention / function specialization --------------- // mirror integrate.ts's ordering: lower, optimize, specialize, re-optimize function specHarness(src: string, oracle: TypeOracle) { @@ -1972,7 +1972,7 @@ test("oracle: an unrecognized constituent is top, never a guess", () => { assert(typeSigToEirType("").tags === "top"); }); -// --- shapes-plan P4.3: shape-guarded property access ---------------------------- +// --- shape-guarded property access ---------------------------- test("shape-oracle: TypeSig -> repr (num=f64, non-num unions=boxed, straddles decline)", () => { assert(typeSigToShapeRepr("num") === "f64"); @@ -1986,7 +1986,7 @@ test("shape-oracle: TypeSig -> repr (num=f64, non-num unions=boxed, straddles de // a stub oracle with receiver-shape facts: types Identifier receivers by // name; everything else declines as unmapped (the real oracle's fail-soft). -// A receiver may carry one shape (mono) or two (the P4.6 poly chain). +// A receiver may carry one shape (mono) or two (the poly chain). function stubShapeOracle( shapes: Record, types?: Record @@ -2085,7 +2085,7 @@ test("shapes: EJS_NO_SHAPE_GUARDS disables the diamonds", () => { } }); -// --- shapes-plan P4.6: 2-way polymorphic guard chains ---------------------------- +// --- 2-way polymorphic guard chains ---------------------------- // the second class of the poly pair: same fields x/y at DIFFERENT slots // (plus its own z), so per-arm slot immediates are observable @@ -2210,7 +2210,7 @@ interface SlotAttackOpts { guarded?: boolean; // guard the slot op with has_shape (default true) killInFast?: boolean; // a call between the guard and the slot op store?: boolean; // slot_store instead of slot_load - storeRaw?: boolean; // unbox the stored value (the P4.5 typed store form) + storeRaw?: boolean; // unbox the stored value (the typed store form) tagGuard?: "none" | "true" | "false"; // has_tag fact for the stored value slot?: number; repr?: string; @@ -2272,7 +2272,7 @@ function buildSlotAttack(o: SlotAttackOpts): { mod: Module; fn: Func } { slot: o.slot ?? 0, repr: repr, }); - // P4.5: an f64-repr load produces a raw f64 (stamped by lowering) + // an f64-repr load produces a raw f64 (stamped by lowering) // and boxes at the fast exit; loadType overrides for attack IR fastv.type = o.loadType ?? (repr === "f64" ? "f64" : "any"); if (fastv.type === "f64") fastv = fb.emit("box_f64", [fastv], {}); @@ -2322,7 +2322,7 @@ test("shapes-verify: slot out of bounds / repr mismatch / unknown shape reject", }); test("shapes-verify: slot_store repr proofs — typed f64, tagged boxed", () => { - // P4.5: an f64 store takes a raw f64 — the type system IS the proof; + // an f64 store takes a raw f64 — the type system IS the proof; // no has_tag fact anywhere and it still verifies verifyModule(buildSlotAttack({ store: true, storeRaw: true }).mod); // a BOXED value into an f64 slot is a type error, has_tag fact or not @@ -2356,7 +2356,7 @@ test("shapes-verify: slot_store repr proofs — typed f64, tagged boxed", () => }); test("shapes-verify: slot_load result stamp must match its repr", () => { - // an f64-repr load left stamped "any" is rejected (the P4.3 boxed + // an f64-repr load left stamped "any" is rejected (the boxed // form no longer verifies)... assertThrows( () => verifyModule(buildSlotAttack({ loadType: "any" }).mod), @@ -2411,7 +2411,7 @@ test("shapes-opt: consecutive gets on one receiver merge to one guard region", ( test("shapes-poly-opt: chains pass the optimizer un-merged and re-verify", () => { // The region matcher and fact folder are mono-strict by construction: - // a P4.6 chain's first guard has the second CHECK block as its miss + // a poly chain's first guard has the second CHECK block as its miss // edge (not a generic slow arm) and its join has three predecessors, // so both machineries must refuse — everything survives verbatim and // the module re-verifies. (Chain-aware merging is future measured @@ -2590,7 +2590,7 @@ test("shapes-opt: a stale (earlier-block) has_shape compare never folds", () => verifyModule(mod2); }); -// --- shapes-plan P4.5: typed slots + heterogeneous fusion ------------------------ +// --- typed slots + heterogeneous fusion ------------------------ test("shapes-typed: f64 loads are raw + boxed at the exit; stores unbox", () => { const g = lowerWithOracle("function f(p) { return p.x; }", stubShapeOracle({ p: PXY })); @@ -2716,7 +2716,7 @@ test("shapes-typed: a boxed-field get feeding slow arithmetic refuses re-executi assert(control.shape_regions_merged === 1, "the f64-repr control must merge"); }); -// --- shapes-plan P4.4: born with their shape ----------------------------------- +// --- born with their shape ----------------------------------- test("born-shaped: a static literal lowers to make_object_shaped under --types", () => { const { printed } = lowerWithOracle( @@ -2799,7 +2799,7 @@ test("ctor-fill: a call-valued store cuts the prefix (fence, oracle-free)", () = assertNotContains(printed, "fill_object_shaped"); }); -test("ctor-fill: `in` mid-prefix cuts the batch (the P4.4 observable)", () => { +test("ctor-fill: `in` mid-prefix cuts the batch (the mid-construction observable)", () => { const { printed } = lowerWithOracle( 'function Pt(x, y) { this.x = x; this.t = "y" in this; this.y = y; }', stubOracle({ x: ["number"], y: ["number"] }) @@ -2935,9 +2935,9 @@ test("born-verify: make_object_shaped checks field count and known shape", () => assertThrows(() => verifyModule(mod2), "unknown module shape"); }); -// the P4.3-era optimizer/verifier proof-strength hazard (found by +// the optimizer/verifier proof-strength hazard (found by // types-bornshapewrong1): foldProvenGuards deletes a has_tag over a -// const-number join (`c ? 1 : 0`), uncovering the slot_store. P4.5's +// const-number join (`c ? 1 : 0`), uncovering the slot_store. The typed-store form's // typed store dissolves the hazard class: the store takes a raw f64 // (unbox under whatever proof lowering had), so no guard deletion can // ever strip the proof — the TYPE is the proof. Pin both directions: @@ -2994,7 +2994,7 @@ test("born-verify: a boxed value into an f64 slot rejects by type", () => { assertThrows(() => verifyModule(buildConstJoinStore(true)), "raw f64"); }); -// --- sinking-plan S1: shaped-literal sinking ----------------------------------- +// --- shaped-literal sinking ----------------------------------- function lowerShapedSink(src: string): { printed: string; stats: OptStats } { const r = lowerFunctionNode( diff --git a/lib/eir/verifier.ts b/lib/eir/verifier.ts index 06ecb07f..7c55f06b 100644 --- a/lib/eir/verifier.ts +++ b/lib/eir/verifier.ts @@ -16,10 +16,10 @@ import { opInfo, isTerminator, Effect } from "./ops"; import { printInst } from "./printer"; import type { Func, Block, Inst, Module } from "./ir"; -// --- shape guard facts (shapes-plan P4.3) ----------------------------------- +// --- shape guard facts ----------------------------------- // // The effect-kill soundness inventory for shape facts, in one place (this -// is THE new hazard class this phase adds — see docs/shapes-plan.md): +// is THE hazard class shape facts add): // // - A fact "(value v, shape S)" means: on every path to here, a // has_shape(v, S) compare executed, answered true, and NO instruction @@ -49,7 +49,7 @@ import type { Func, Block, Inst, Module } from "./ir"; // Number-tag facts (the BOXED slot_store's repr proof) need no kill rule: // has_tag tests the VALUE's own tag, and SSA values are immutable — // dominance alone suffices (tagFactDominates below, the guardFactAt shape -// from optimize-guards generalized to either edge). P4.5 typed slots: an +// from optimize-guards generalized to either edge). Typed slots: an // f64-repr store takes a raw f64 operand, so its repr proof is the type // system itself (a raw f64 is a number by construction) — the has_tag // dominance requirement, and the provenNumberIntrinsic escape hatch that @@ -58,7 +58,7 @@ import type { Func, Block, Inst, Module } from "./ir"; // The engine is shared with optimize-guards' shape-fact folding: the // optimizer folds on the same facts the verifier re-derives, so a fold the // optimizer gets wrong is a fold the verifier rejects (trust-free, the -// P3.4 discipline). +// raw-join discipline). const SHAPE_KILL = Effect.WRITE | Effect.CALL; @@ -371,8 +371,8 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { // already emit their own machine i1); // - branch-edge arguments must be boxed: block params are EjsValue // phis in the emitter, so f64/i1 may NOT cross block boundaries. - // (Phase 3's guarded diamonds carry values across joins boxed.) - // Phase 3.4's ONE controlled exception: a param carrying the + // (guarded diamonds carry values across joins boxed.) + // The FIRST controlled exception: a param carrying the // optimizer's rawJoin marker (Inst.rawJoin) is an f64-typed phi // (double in the emitter) and takes exactly f64 arguments. The // marker is provenance, not trust — the full safety conditions @@ -385,7 +385,7 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { // rejected below — and an f64 value can never be *treated as* an // ejsval in a handler (or anywhere), because every ejsval-taking // slot and every boxed param rejects f64-typed operands/args. - // Phase 3.6's SECOND controlled exception: a specialized clone's + // The SECOND controlled exception: a specialized clone's // ENTRY blockparam is f64 exactly when the function's sig types // the matching formal f64 (env/this stay boxed); its `return` // operand type must equal the sig's result; and every call_typed @@ -447,7 +447,7 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { } }); - // Phase 3.6: call_typed is typed by its CALLEE's sig, which a + // call_typed is typed by its CALLEE's sig, which a // per-op table can't express. operand 0 (env) stays boxed; // the argument slots must match the callee's formals exactly, // and the instruction's stamped result type must equal the @@ -489,7 +489,7 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { }); continue; } - // P4.5 typed slots: slot ops are typed by their repr immediate, + // typed slots: slot ops are typed by their repr immediate, // which a per-op table can't express (the call_typed precedent). // The receiver is always boxed; an f64-repr store takes exactly // a raw f64 (the type system IS the repr proof), a boxed-repr @@ -507,7 +507,7 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { } continue; } - // Phase 3.6: a sigged function's `return` must produce exactly + // a sigged function's `return` must produce exactly // the sig's result type (f64 result -> raw f64 operand) if (inst.op === "return" && fn.sig && fn.sig.result === "f64") { const o = inst.operands[0]!; @@ -533,13 +533,13 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { } } - // --- shapes-plan P4.3: shape-guarded slot access ----------------------- + // --- shape-guarded slot access ----------------------- // Every slot op must sit under an un-killed dominating has_shape fact on // the same value for the same shape (see the effect-kill inventory at the // top of this file); stores additionally prove the stored value's repr // matches the field's — by TYPE for f64 (the typed-flow rule above), by // a has_tag=false dominance fact for boxed — so compiled stores never - // owe a transition. P4.5: slot_load's result stamp must agree with its + // owe a transition. slot_load's result stamp must agree with its // repr (raw f64 loads are only meaningful under the guard's repr proof). // With a module in hand, imms are checked against the module shape table // (bounds, repr identity, known key). @@ -555,7 +555,7 @@ export function verifyFunction(fn: Func, mod?: Module): boolean { if (mod && !fields) fail(`'${inst.op}' names unknown module shape '${shapeImm}'`, inst); if (isBornOp) { - // shapes-plan P4.4: operand count must equal the shape's + // operand count must equal the shape's // field count (+1 receiver for fill), at least one field — // an empty born shape is a plain make_object, not this op. const nvals = diff --git a/lib/options.ts b/lib/options.ts index 98184424..63ab809a 100644 --- a/lib/options.ts +++ b/lib/options.ts @@ -22,7 +22,7 @@ export interface CompilerOptions { warn_on_undeclared: boolean; frozen_global: boolean; record_types: boolean; - // MAAM type-analysis probe (docs/maam-plan.md): run the analysis and + // MAAM type-analysis probe: run the analysis and // log stats; codegen consumes nothing yet. Distinct from record_types // (the runtime type-recording instrumentation). types: boolean; diff --git a/lib/runtime.ts b/lib/runtime.ts index f9a812ed..f4ae09b1 100644 --- a/lib/runtime.ts +++ b/lib/runtime.ts @@ -166,7 +166,7 @@ const runtime_interface = { ); }, - // gc-plan P2: the out-of-line half of the emitted write barrier + // the out-of-line half of the emitted write barrier // (object-remembering: the OWNER ejsval, not the slot) gc_write_barrier: function (this: RuntimeContext) { return this.abi.createExternalFunction( @@ -284,7 +284,7 @@ const runtime_interface = { ]) ); }, - // born-with-shape (shapes-plan P4.4): batched literal allocation and + // born-with-shape: batched literal allocation and // fenced-constructor prefix fill. argc, names*, values*. object_new_shaped: function (this: RuntimeContext) { return this.abi.createExternalFunction(this.module, "_ejs_object_new_shaped", ty.EjsValue, [ @@ -417,7 +417,7 @@ const runtime_interface = { ty.EjsValue, ]); }, - // shapes-plan P4.3: module-init interning of guard shapes (names are + // module-init interning of guard shapes (names are // this module's atoms; f64_mask bit i = field i has repr f64). // Returns the interned shape index, or EJS_SHAPE_NOMATCH. shape_intern: function (this: RuntimeContext) { diff --git a/lib/types.ts b/lib/types.ts index cd13a4fb..b23a27d9 100644 --- a/lib/types.ts +++ b/lib/types.ts @@ -97,7 +97,7 @@ export function initTypes(is32bit: boolean): void { // until after we've determined pointer size. // the 64-bit GCObjectHeader is represented as two i32s (little-endian - // halves) so the P4.3 shape-guard emitter can load the shape/gc half + // halves) so the shape-guard emitter can load the shape/gc half // (field 1) without masking a 64-bit load; byte layout is identical if (is32bit) { EjsObject = llvm.StructType.create("struct.EJSObject", [ diff --git a/runtime/ejs-exception.c b/runtime/ejs-exception.c index eb2bb08e..aa58e11b 100644 --- a/runtime/ejs-exception.c +++ b/runtime/ejs-exception.c @@ -214,7 +214,7 @@ ejsval _ejs_begin_catch(void *exc_gen) #else struct ejs_exception *exc = (struct ejs_exception*)__cxa_begin_catch(exc_gen); #endif - // NOTE (gc-P2): &exc->val is rooted at throw and unrooted by the + // NOTE: &exc->val is rooted at throw and unrooted by the // __cxa_throw destructor when the exception is released — the // pairing is sound, and removing it here instead would race a // same-address reallocation of the cxa buffer (found the hard way). diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index efb3bcdf..71696004 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -574,7 +574,7 @@ _ejs_propertymap_insert (EJSPropertyMap* map, ejsval name, EJSPropertyDesc* desc } // ------------------------------------------------------------------------ -// shaped-mode slot storage (shapes-plan P4.2). Ordinary objects with a +// shaped-mode slot storage. Ordinary objects with a // nonzero shape index keep their plain data property values in a // closureenv slot array at shape-determined indices; the map only exists // in dictionary mode. EJS_SHAPE_CAP is clamped to 256, so fixed @@ -649,7 +649,7 @@ _ejs_object_to_dictionary (EJSObject* obj, EJSShapeMigrateReason reason) } // ------------------------------------------------------------------------ -// born-with-shape allocation (shapes-plan P4.4). Compiled --types code +// born-with-shape allocation. Compiled --types code // batches an object literal's (or a fenced constructor prefix's) stores // into one call carrying the field names (interned atoms) and values in // source order. The TRUE shape is re-derived from the actual values via @@ -847,7 +847,7 @@ collect_keys (ejsval objval, int *num, int *alloc, ejsval **keys) EJSObject *obj = EJSVAL_TO_OBJECT(objval); EJS_ASSERT(obj); - // shapes P4.2: shaped objects enumerate the shape chain (all fields + // shaped mode: shaped objects enumerate the shape chain (all fields // are enumerable by construction; the chain is insertion order) uint32_t shape = EJS_OBJECT_SHAPE(obj); if (shape != EJS_SHAPE_DICT) { @@ -976,7 +976,7 @@ _ejs_init_object (EJSObject* obj, ejsval proto, EJSSpecOps *ops) { obj->proto = proto; obj->ops = ops ? ops : &_ejs_Object_specops; - // shapes P4.2: ordinary objects are born with the root shape and + // shaped mode: ordinary objects are born with the root shape and // lazily-allocated slot storage — no map calloc on this path; // everything else (and every object under EJS_SHAPES=off) is // dictionary-mode from birth @@ -1330,7 +1330,7 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyNames) { /* 3. Let n be 0. */ - // shapes P4.2: shaped objects report their (all-enumerable, + // shaped mode: shaped objects report their (all-enumerable, // string-keyed) shape fields in insertion order uint32_t O_shape = EJS_OBJECT_SHAPE(O_); if (O_shape != EJS_SHAPE_DICT) { @@ -1383,7 +1383,7 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertySymbols) { /* 3. Let n be 0. */ - // shapes P4.2: shaped objects never carry symbol-keyed properties + // shaped mode: shaped objects never carry symbol-keyed properties if (EJS_OBJECT_SHAPE(O_) != EJS_SHAPE_DICT) return arr; @@ -1451,7 +1451,7 @@ static EJS_NATIVE_FUNC(_ejs_Object_assign) { // j. Let pendingException be undefined. ejsval pendingException = _ejs_undefined; - // shapes P4.2: a shaped source enumerates its shape fields (all + // shaped mode: a shaped source enumerates its shape fields (all // enumerable plain data properties, in insertion order) uint32_t from_shape = EJS_OBJECT_SHAPE(from_); if (from_shape != EJS_SHAPE_DICT) { @@ -1613,7 +1613,7 @@ static EJS_NATIVE_FUNC(_ejs_Object_defineProperties) { /* 3. Let names be an internal list containing the names of each enumerable own property of props. */ int names_len = 0; ejsval* names; - // shapes P4.2: a shaped props object enumerates its shape fields + // shaped mode: a shaped props object enumerates its shape fields uint32_t props_shape = EJS_OBJECT_SHAPE(props_obj); if (props_shape != EJS_SHAPE_DICT) { names_len = (int)_ejs_shape_field_count(props_shape); @@ -2327,7 +2327,7 @@ _ejs_object_specop_get (ejsval O, ejsval P, ejsval Receiver) EJSObject* O_ = EJSVAL_TO_OBJECT(O); uint32_t O_shape = EJS_OBJECT_SHAPE(O_); if (O_shape != EJS_SHAPE_DICT) { - // shapes P4.2 fast path: a hit is a fixed-index slot load; a + // shaped-mode fast path: a hit is a fixed-index slot load; a // miss (including symbol keys, which shaped objects never // carry) falls to the proto walk below uint32_t slot; @@ -2381,7 +2381,7 @@ _ejs_object_specop_get_own_property (ejsval obj, ejsval propertyName, ejsval* ex ejsval property_str = ToPropertyKey(propertyName); EJSObject* obj_ = EJSVAL_TO_OBJECT(obj); - // shapes P4.2: shaped objects synthesize the default data + // shaped mode: shaped objects synthesize the default data // descriptor from the slot (their fields are always plain // writable/enumerable/configurable string-keyed data properties) uint32_t shape = EJS_OBJECT_SHAPE(obj_); @@ -2405,7 +2405,7 @@ _ejs_object_specop_set (ejsval O, ejsval P, ejsval V, ejsval Receiver) // 1. Assert: IsPropertyKey(P) is true. P = ToPropertyKey(P); // XXX this shouldn't be necessary, but ejs passes numbers here - // shapes P4.2 fast path: a store to an existing shaped field on the + // shaped-mode fast path: a store to an existing shaped field on the // receiver itself is a repr check + slot store (shaped fields are // always plain writable data properties). Absent fields take the // generic path below — its proto walk and CreateDataProperty @@ -2534,7 +2534,7 @@ _ejs_object_specop_delete (ejsval O, ejsval P, EJSBool Throw) /* 3. If desc.[[Configurable]] is true, then */ if (_ejs_property_desc_is_configurable(desc)) { /* a. Remove the own property with name P from O. */ - // shapes P4.2: deletes are a dictionary-mode affair + // shaped mode: deletes are a dictionary-mode affair if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) _ejs_object_to_dictionary (obj, EJS_SHAPE_MIGRATE_DELETE); _ejs_propertymap_remove (obj->map, P); @@ -2562,7 +2562,7 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des EJSObject* obj = EJSVAL_TO_OBJECT(O); - // gc-plan P2 (object-remembering): every storage path below — + // the object-remembering barrier contract: every storage path below — // shaped slot, map insert, in-place descriptor update — installs // these values somewhere in obj's owned storage. Marking up front // is at worst conservative (a rejected define dirties one object @@ -2572,7 +2572,7 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des if (_ejs_property_desc_has_getter(Desc)) _ejs_gc_remember(obj, Desc->getter); if (_ejs_property_desc_has_setter(Desc)) _ejs_gc_remember(obj, Desc->setter); - // shapes P4.2: route shaped objects up front. Plain default- + // shaped mode: route shaped objects up front. Plain default- // attribute data properties live in slot storage; anything the // shaped world can't express migrates to dictionary mode and falls // into the generic algorithm below. (Absent property on a @@ -2811,14 +2811,14 @@ void _ejs_object_specop_finalize(EJSObject* obj) { _ejs_shape_object_died (obj); - // shapes P4.2: shaped objects have no map; their slot array is GC + // shaped mode: shaped objects have no map; their slot array is GC // memory and needs no finalization if (EJS_OBJECT_SHAPE(obj) == EJS_SHAPE_DICT && obj->map) _ejs_propertymap_free (obj->map); obj->map = NULL; } -// gc-plan P2: walk the entries directly so every scanned slot is the +// walk the entries directly so every scanned slot is the // REAL storage location (the old foreach_property shim passed the name // by value — a moved name's rewrite would have landed in a local copy). // Property names are content-hashed, so a moving name never invalidates @@ -2844,7 +2844,7 @@ scan_property_entries (EJSPropertyMap* map, EJSValueFunc scan_func) static void _ejs_object_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { - // shapes P4.2: shaped objects trace their slot array (a closureenv, + // shaped mode: shaped objects trace their slot array (a closureenv, // which scans its own ejsval range); field names are rooted by the // global shape table if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { @@ -2912,7 +2912,7 @@ _ejs_object_specop_own_property_keys (ejsval O) { EJSObject* O_ = EJSVAL_TO_OBJECT(O); - // shapes P4.2: snapshot the own property names from whichever store + // shaped mode: snapshot the own property names from whichever store // this object uses; the classification below is shared so the two // modes stay byte-identical uint32_t O_shape = EJS_OBJECT_SHAPE(O_); diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index 7f5288e7..7edc8750 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -230,7 +230,7 @@ struct _EJSObject { GCObjectHeader gc_header; EJSSpecOps* ops; ejsval proto; // [[Prototype]] - // shapes-plan P4.2: property storage is mode-switched on the + // property storage is mode-switched on the // header's shape index. Dictionary mode (shape 0) keeps the map; // shaped mode stores plain data property values in a closureenv // slot array (an ejsval so the GC scan traces it; _ejs_null until @@ -298,7 +298,7 @@ ejsval _ejs_object_literal_set_proto (ejsval obj, ejsval proto); ejsval _ejs_object_create (ejsval proto); -// born-with-shape (shapes-plan P4.4): batch a statically-keyed literal's +// born-with-shape: batch a statically-keyed literal's // (new_shaped) or a fenced constructor prefix's (fill_shaped) field // installs into one call. names are interned atoms and values the // initial field values, in source order; both fall back to sequential diff --git a/runtime/ejs-shapes.c b/runtime/ejs-shapes.c index e5107733..2fdcf2f1 100644 --- a/runtime/ejs-shapes.c +++ b/runtime/ejs-shapes.c @@ -1,8 +1,8 @@ /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=4 sw=4 et tw=99 ft=cpp: * - * Runtime shape tracking (shapes-plan P4.1/P4.2). This module owns the - * global interned shape table and the transition cache; since P4.2 the + * Runtime shape tracking. This module owns the + * global interned shape table and the transition cache; the * object layer (ejs-object.c) stores shaped objects' property values in * slot arrays at the indices this table dictates, via the transition / * lookup API below. The census (dumped at exit under EJS_SHAPES_CENSUS) @@ -63,7 +63,7 @@ static uint32_t stat_max_depth; /* returns the new shape's index, or EJS_SHAPE_DICT if the table is full. stops one short of EJS_SHAPE_NOMATCH: that index must never be allocatable, so a compiled guard against the sentinel is statically - false (shapes-plan P4.3) */ + false */ static uint32_t shape_alloc(uint32_t parent, ejsval name, uint8_t repr, uint32_t field_count) { @@ -339,7 +339,7 @@ _ejs_shape_intern(uint32_t nfields, const ejsval *names, uint32_t f64_mask) { if (!_ejs_shapes_tracking) return EJS_SHAPE_NOMATCH; - /* the empty shape IS the root: P4.4's fill_object_shaped guard + /* the empty shape IS the root: fill_object_shaped's guard (has_shape(this, "")) interns zero fields and must match the construct-allocated empty receiver */ if (nfields == 0) diff --git a/runtime/ejs-shapes.h b/runtime/ejs-shapes.h index 4dac8516..5558a910 100644 --- a/runtime/ejs-shapes.h +++ b/runtime/ejs-shapes.h @@ -1,12 +1,12 @@ /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=4 sw=4 et tw=99 ft=cpp: * - * Runtime shape tracking (shapes-plan P4.1/P4.2). + * Runtime shape tracking. * * A shape is a transition edge (parent, name, repr) appended to a parent * shape; the global table is interned and append-only, mirroring maam's * type-aware hidden classes one-for-one (repr is part of shape identity). - * Since P4.2 the shape IS the property structure for shaped-mode ordinary + * The shape IS the property structure for shaped-mode ordinary * objects: their values live in a slot array at shape-determined indices * (the storage engine is in ejs-object.c; this module owns the shape * table and answers name->slot / transition queries). Anything the @@ -44,7 +44,7 @@ typedef enum { cap, table full). The table never allocates this index (shape_alloc stops one short), so no object header can ever carry it — a guard against it is statically false, and the guarded slow path serves every - access. shapes-plan P4.3. */ + access. */ #define EJS_SHAPE_NOMATCH 0xFFFFFFu /* hard ceiling on shaped field count (and EJS_SHAPE_CAP): a full slot @@ -54,12 +54,12 @@ typedef enum { lookup makes marking quadratic on big heaps (the stage2 self-compile went from minutes to hours before this cap). 16-byte EJSClosureEnv header + 14 * 8-byte slots = 128. Objects with more fields drop to - dictionary mode — the pre-P4.2 map world. Revisit when the gc plan + dictionary mode — the original map world. Revisit when the gc plan gives the LOS an O(log n) lookup or a 256-byte size class. */ #define EJS_SHAPE_FIELD_CAP_MAX 14 /* the shape index lives in bits 32-55 of the 64-bit GCObjectHeader (bit - 56 is the P4.2 storage-mode bit; 57-63 belong to the GC) — see the + 56 is the storage-mode bit; 57-63 belong to the GC) — see the layout comment in ejs-types.h */ #define EJS_GC_HEADER_SHAPE_SHIFT 32 #define EJS_GC_HEADER_SHAPE_MASK 0xFFFFFFULL @@ -141,7 +141,7 @@ void _ejs_shape_object_migrate(EJSObject *obj, EJSShapeMigrateReason reason); /* finalizer hook, census only */ void _ejs_shape_object_died(EJSObject *obj); -/* shape-table queries for the object layer's storage engine (P4.2). +/* shape-table queries for the object layer's storage engine. None of these touch any object. */ /* number of own fields of `shape` */ @@ -196,7 +196,7 @@ _ejs_shape_transition_add_fast(uint32_t shape, ejsval name, ejsval value, uint32_t _ejs_shape_transition_set(uint32_t shape, uint32_t slot_index, ejsval value); -/* module-init interning for compiled shape guards (shapes-plan P4.3, the +/* module-init interning for compiled shape guards (the atom-table precedent): walk/intern the ordered shape whose fields are names[0..nfields) with reprs from f64_mask (bit i set = field i is EJS_SHAPE_REPR_F64), returning its index for the module's shape global. diff --git a/runtime/ejs-types.h b/runtime/ejs-types.h index cdc77fe7..a3cde297 100644 --- a/runtime/ejs-types.h +++ b/runtime/ejs-types.h @@ -27,25 +27,24 @@ typedef double jsdouble; typedef uint16_t jschar; -// The object header, widened to 64 bits as the joint gc-plan P1 / -// shapes-plan P4.1 layout (one layout, written once — see -// docs/gc-plan.md "Object header, forwarding, and shapes" and -// docs/shapes-plan.md "Object layout, in two steps"): +// The object header, widened to 64 bits as one joint GC/shapes layout +// (written once — see docs/gc-plan.md "Object header, forwarding, and +// shapes" and docs/shapes-plan.md "Object layout, in two steps"): // // bits 0-31 the pre-existing 32-bit header: EJSScanType in the low // bits, user flags at EJS_GC_USER_FLAGS_SHIFT (unchanged) // bits 32-55 shape index (0 = dictionary mode / untracked) -// bit 56 shaped-storage mode bit (shapes P4.2) -// bit 57 YOUNG — allocated since the last collection (gc-P0 +// bit 56 shaped-storage mode bit +// bit 57 YOUNG — allocated since the last collection (profiling // profiling; a nursery age bit in waiting) -// bit 58 PINNED — conservatively referenced this cycle (gc-P0 +// bit 58 PINNED — conservatively referenced this cycle (profiling // profiling, cleared each cycle) // bit 59 FORWARDED — the word is a forwarding record, not a -// header: target address in bits 0-46 (gc-P1; see +// header: target address in bits 0-46 (see // ejs-gc.h _ejs_gc_forward) // bit 60 DIRTY — the object is in the generational remembered -// buffer (gc-P2 object-remembering write barrier) -// bits 61-63 reserved for the GC (mark/card, gc-P4+) +// buffer (object-remembering write barrier) +// bits 61-63 reserved for the GC (future mark/card bits) // // EJSObject absorbs the widening into what was padding (sizeof // unchanged); EJSPrimString/EJSPrimSymbol keep their sizes; EJSClosureEnv diff --git a/runtime/ejs-value.h b/runtime/ejs-value.h index fda9ae92..42af4dad 100644 --- a/runtime/ejs-value.h +++ b/runtime/ejs-value.h @@ -59,7 +59,7 @@ ejsval _ejs_number_new (double value); void _ejs_value_finalize(ejsval val); -// gc-plan P2: scan callbacks take the SLOT, not the value — the mover +// scan callbacks take the SLOT, not the value — the mover // rewrites *slot when the referent is evacuated. Non-moving consumers // (the old mark path) simply read through it. typedef void (*EJSValueFunc)(ejsval* slot); From 9c5e24b5e6ff9db32c2e5c08d78d886c2f4d1b2e Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sat, 25 Jul 2026 18:42:19 -0700 Subject: [PATCH 118/146] =?UTF-8?q?eir:=20sinking-P2=20=E2=80=94=20epoch-g?= =?UTF-8?q?uarded=20constructor-result=20sinking?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The types-bench2 alloc loop, deleted: a construct of a module-local fence-passing constructor virtualizes behind a one-load accessor-epoch check into an allocation-free arm, with the original construct kept as the slow arm from the first intercept-capable installation on. Runtime: _ejs_accessor_epoch (ejs-object.h), bumped at the ordinary DefineOwnProperty specop for accessor / non-writable descriptors on ORDINARY receivers only (a virtualized instance's chain is ctor.prototype -> Object.prototype; anything else needs a bumping setPrototypeOf or a statically-declined prototype swap — without the screen, closure name/length installs killed the epoch at startup) and at both SetPrototypeOf impls; zeroed at the end of _ejs_init. EIR: epoch_check op (arity 0, READ, i1) emitted as global load + compare-to-zero. Optimizer: lib/eir/sink-construct.ts — promoted-%self-slot callee resolution with the all-loads-are-callees discipline (closes the prototype-swap hole statically), structural ctor-body fence (exactly the guarded fill of the formals + return undefined), sinking-P1 use classification plus a fold simulation guaranteeing the virtual clone's allocation always drains, single-entry single-exit acyclic region duplication with live-outs crossing the epoch join through minted params. The existing shaped-literal sink drains the virtual arm. EJS_NO_CTOR_SINK bisects; ctorSunk=N telemetry. Gate: 192 EIR unit tests (5 new); probes types-ctorsink1/2 node-identical incl. EJS_SHAPES=off, gc-stress, and bisected compiles; --types diff lane 492/0/1 over 493; matrix x7 green. types-bench2 0.70s -> 0.26s A/B, allocations 4,000,501+4,000,061 -> 501+61. Co-Authored-By: Claude Fable 5 --- docs/plans.md | 2 +- docs/sinking-plan.md | 86 ++++- lib/compiler.ts | 20 +- lib/eir/emit.ts | 6 + lib/eir/integrate.ts | 31 ++ lib/eir/lower.ts | 3 + lib/eir/ops.ts | 9 + lib/eir/sink-construct.ts | 622 ++++++++++++++++++++++++++++++++++ lib/eir/tests.ts | 180 ++++++++++ runtime/ejs-init.c | 8 + runtime/ejs-object.c | 24 ++ runtime/ejs-object.h | 10 + runtime/ejs-proxy.c | 2 + test/types/types-ctorsink1.js | 60 ++++ test/types/types-ctorsink2.js | 58 ++++ 15 files changed, 1116 insertions(+), 5 deletions(-) create mode 100644 lib/eir/sink-construct.ts create mode 100644 test/types/types-ctorsink1.js create mode 100644 test/types/types-ctorsink2.js diff --git a/docs/plans.md b/docs/plans.md index f3f7f26a..facb2ddb 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -79,7 +79,7 @@ Delete the allocations the mover made cheap. Detail: sinking-plan.md. - [x] **P5.1** shaped-literal sinking + own-key folding (sinking-P1). -- [ ] **P5.2** epoch-guarded constructor-result sinking — the +- [x] **P5.2** epoch-guarded constructor-result sinking — the types-bench2 alloc loop (sinking-P2). - [ ] **P5.3** flow-sensitive field writes, partial escapes, rest_args/args_obj (sinking-P3). diff --git a/docs/sinking-plan.md b/docs/sinking-plan.md index abce760d..59785242 100644 --- a/docs/sinking-plan.md +++ b/docs/sinking-plan.md @@ -4,9 +4,11 @@ Bucket plan; the ordering spine lives in `docs/plans.md`. Phase ids here are `sinking-P#` (formerly S1/S2/S3 in this doc's first revision). -Status: sinking-P1 LANDED (2026-07-25) — see "sinking-P1 results" at the bottom. Owner doc for extending escape analysis + -allocation sinking (docs/plans.md, optimization phase, first bullet) -past what already exists. Written 2026-07-25, after gc-P2. +Status: sinking-P1 LANDED (2026-07-25), sinking-P2 LANDED (2026-07-25) +— see the results sections at the bottom. Owner doc for extending +escape analysis + allocation sinking (docs/plans.md, optimization +phase, first bullet) past what already exists. Written 2026-07-25, +after gc-P2. ## Where we actually are @@ -221,6 +223,84 @@ still drains; in real compiles the specialized clones box their formals, guards resolve true, and the raw path folds. Both routes were pinned by tests. +## sinking-P2 results (2026-07-25) + +Implementation, in the three pieces the design called for: + +- **Runtime** (`_ejs_accessor_epoch`, ejs-object.{h,c}): one global + counter, `== 0` meaning "no user code has installed anything that + could intercept a [[Set]] through a fresh object's prototype chain". + Bumps at the ordinary `DefineOwnProperty` specop for accessor + descriptors and `writable:false` data descriptors, and at both + `SetPrototypeOf` implementations (ordinary + proxy trap); zeroed at + the end of `_ejs_init` so builtin installs never count (the only + builtin accessor on a fresh ordinary chain is `__proto__`, a name the + ctor fence never admits). **The screen that made it viable: only + defines on ORDINARY receivers bump.** A virtualized instance's chain + is `ctor.prototype → Object.prototype`, both ordinary, and any other + object can only join such a chain through a bumping setPrototypeOf or + a statically-declined prototype swap — without the screen, every + closure's non-writable name/length and every module's export + accessors killed the epoch at startup (found by lldb watchpoint on + the first bench run: `_ejs_function_new` at module init). +- **EIR** `epoch_check` op (arity 0, READ, i1): emitted as one load of + the global + compare-to-zero (`emitAccessorEpochCheck`, the + `_ejs_heap` global-seam precedent). No verifier change — the op + table's sig covers it. +- **Optimizer** (`lib/eir/sink-construct.ts`, module pass after + specialization in integrate.ts): resolves construct callees through + the promoted-`%self`-slot discipline (single closure store, + prefix-safe or store-dominated, **every load of the slot used only as + a call/construct callee — which also closes the `Point.prototype = X` + replacement hole statically**, so exotic protos need a bumping + setPrototypeOf); structurally matches the ctor body as exactly the + P4.4 guarded fill of the formals plus `return undefined`; requires + argc == formal count and the sinking-P1 use classification on the + result; computes the single-entry single-exit acyclic use region; + runs a fold simulation (the sinkShapedAlloc guard rule) proving every + use folds or dies unreachable — the all-or-nothing guarantee that the + virtual arm's allocation always drains. The rewrite splits at the + construct, closes the head with `epoch_check` + cond_br, keeps the + original region as the slow arm, and clones the region with the + construct replaced by `make_object_shaped(args)`; region-defined + values used past the exit cross through minted join params (rawJoin + for f64). The existing shaped-literal sink then drains the clone in + the post-sink optimizer round. Bisect: `EJS_NO_CTOR_SINK`; + telemetry: `ctorSunk=N` on the `--types:` line, `EIR-ctor-sink` debug + line. + +Gate evidence (all green, 2026-07-25): + +- 192 EIR unit tests (5 new `sink-ctor`: full sink, live-outs across + the epoch join, six refusal attacks in one sweep — second store / + prototype-touching load / trailing ctor code / swapped fill operands + / argc mismatch / escaping result — non-promoted slot, bisect hook). +- Probes `types-ctorsink1` (epoch coverage: clean run, accessor + installed mid-loop through Object.prototype at i=5, then a + non-writable data property mid-loop — slow arm and interception from + that iteration on) and `types-ctorsink2` (pure-win kernel + escape + decline + prototype-method decline): node-identical, including under + `EJS_SHAPES=off`, `EJS_GC_EVERY_N_ALLOC=101`, and an + `EJS_NO_CTOR_SINK` compile. +- `--types` diff lane: 493 files, 492 identical, 0 divergent, 1 N/A + (tester.js, standing). ctorSunk fires in types-bench2 (2), + types-sink1 (2), and the two new probes — everywhere else the + fail-closed screens decline. +- Matrix ×7 green (test-eir, lowtier, stages 0-3 at 419 pass / + 22 standing xfail each, shapes-off lane). +- **types-bench2: 0.70s → 0.26s wall (warm, A/B vs EJS_NO_CTOR_SINK + exes from the same tree); allocations 4,000,501 objects + 4,000,061 + envs → 501 + 61 (EJS_GC_PROFILE).** The alloc() loop is + allocation-free — better than the ~0.3s phase target; the residual + 0.26s is kern. + +What the sunk loop still pays per iteration: one epoch load+compare, +one `%self` slot load of the ctor (kept live by the slow arm), and two +generic `add` calls (the oracle doesn't type s + p.x, so those adds +never had diamonds) — all noise next to the construct it replaced. +Recorded for later phases: slot-load licm and add-diamond coverage +would shave the rest. + Gate evidence: 187 EIR unit tests green (8 new: full sink, escape / call-operand / write / prototype-read / wrong-shape / hand-built unprovable-repr refusals, bisect hook); --types diff lane 485 diff --git a/lib/compiler.ts b/lib/compiler.ts index 628852c0..bb12a3c3 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -717,6 +717,22 @@ class LLVMIRVisitor implements VisitorSurface { ); return this.heap_ctx_global; } + // the runtime's accessor epoch (ejs-object.h): zero while nothing + // user-installed can intercept a [[Set]] through a fresh object's + // prototype chain. The check is one load + compare-to-zero. + accessor_epoch_global: llvm.GlobalVariable | null = null; + emitAccessorEpochCheck(): llvm.Value { + if (!this.accessor_epoch_global) + this.accessor_epoch_global = new llvm.GlobalVariable( + this.module, + types.Int64, + "_ejs_accessor_epoch", + null, + true + ); + const epoch = ir.createLoad(types.Int64, this.accessor_epoch_global, "accessor_epoch"); + return ir.createICmpEq(epoch, consts.int64(0), "epoch_ok"); + } // the inline nursery allocation for closure // environments — bump, compare, init header/length/slots, box with // the CLOSUREENV tag; the slow thunk (the existing runtime call) is @@ -1104,7 +1120,9 @@ export function compile( .sort() .map((k) => `${k}:${lowered.fence_declined![k]}`) .join(",")}` - : "") + : "") + + // constructor-result sinking telemetry (additive) + ((lowered.ctor_sunk ?? 0) > 0 ? ` ctorSunk=${lowered.ctor_sunk}` : "") ); } diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 23fc43de..5e54ef13 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -49,6 +49,9 @@ export interface VisitorSurface { // value's payload in the nursery range" (layout knowledge lives in // compiler.ts with the other NaN-box tests) emitYoungCheck(val: llvm.Value): llvm.Value; + // i1: the runtime's accessor epoch is still zero (one global load + + // compare; the global lives beside the other runtime seams) + emitAccessorEpochCheck(): llvm.Value; // inline nursery bump allocation for closure envs emitEnvAllocInline(n: number, slowCall: () => llvm.Value): llvm.Value; // the gc-frame record (precise relocatable JS roots) and @@ -793,6 +796,9 @@ export class EIREmitter { ); return; } + case "epoch_check": + this.values.set(inst, this.v.emitAccessorEpochCheck()); + return; case "unbox_f64": this.values.set(inst, this.v.unboxDouble(this.val(inst.operands[0]))); return; diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 5220489b..447058c3 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -33,6 +33,7 @@ import { FunctionBuilder } from "./builder"; import { verifyModule } from "./verifier"; import { injectLowTierProbes } from "./lowtier-probe"; import { optimizeModule } from "./optimize"; +import { sinkConstructResults } from "./sink-construct"; import { printModule } from "./printer"; import type * as e from "../estree"; import type { ModuleInfo } from "../module-info"; @@ -64,6 +65,8 @@ export type CollectResult = // typed (raw f64) slot accesses emitted typed_loads: number; typed_stores: number; + // construct sites virtualized by constructor-result sinking + ctor_sunk: number; // specialization stats (null when --types is off or nothing qualified) spec: SpecStats | null; error?: undefined; @@ -82,6 +85,7 @@ export type CollectResult = fence_declined?: undefined; typed_loads?: undefined; typed_stores?: undefined; + ctor_sunk?: undefined; spec?: undefined; }; @@ -529,6 +533,32 @@ export function collectEIRToplevel( } if (spec_stats.specialized === 0 && spec_stats.rejected === 0) spec_stats = null; } + + // constructor-result sinking: epoch-guarded + // virtualization of module-local shaped-constructor results + // (docs/sinking-plan.md). Runs after specialization — the + // hot construct sites live inside the clones — and re-runs + // the optimizer so the shaped-literal sink drains the + // planted virtual allocations. EJS_NO_CTOR_SINK bisects + // (checked inside the pass). + if (oracle) { + const promoted = new Set(); + if (this_module_info) + this_module_info.exports.forEach((einfo) => { + if (einfo.promoted) promoted.add(einfo.slot_num); + }); + const n = sinkConstructResults(eir_module, promoted, info.name); + if (n > 0) { + verifyModule(eir_module); + optimizeModule(eir_module); + verifyModule(eir_module); + typed_stats.ctor_sunk = n; + debug.log( + 1, + `EIR-ctor-sink: ${filename}: ${n} construct site(s) virtualized` + ); + } + } if (dumpOptRequested(options)) dumpModule(filename, "optimized", eir_module); } @@ -553,6 +583,7 @@ export function collectEIRToplevel( fence_declined: typed_stats.fence_declined ?? {}, typed_loads: typed_stats.typed_loads ?? 0, typed_stores: typed_stats.typed_stores ?? 0, + ctor_sunk: typed_stats.ctor_sunk ?? 0, spec: spec_stats, }; } catch (e) { diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index ff3a9442..c592b869 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -78,6 +78,9 @@ export interface ModCtx { // typed (raw f64) slot accesses emitted typed_loads?: number; typed_stores?: number; + // construct sites virtualized by the optimizer's + // epoch-guarded constructor-result sinking + ctor_sunk?: number; }; // --types-dump: per-site shape census lines shape_dump?: boolean; diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 444b5f6d..6b37524b 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -231,6 +231,15 @@ export const OPS = { // must take the sequential slow arm, where mid-construction // observables behave identically). fill_object_shaped: { arity: -1, effects: E.GC | E.WRITE, imms: ["shape"] }, + // i1: is the runtime's accessor epoch still zero — i.e. has NO user + // code installed anything that could intercept a [[Set]] through a + // fresh object's prototype chain (accessor property, non-writable + // data property, prototype swap; see _ejs_accessor_epoch in + // ejs-object.h)? Minted only by the optimizer's constructor-result + // sinking, guarding a virtualized (allocation-free) construct + // against the interception the deleted stores could have met. One + // global load + compare; READ because the global is mutable. + epoch_check: { arity: 0, effects: E.READ, sig: { params: [], result: "i1" } }, // a raw f64 constant (imms.value). minted only by the optimizer // (rawJoinParams' const-number edge roots) and the specialization // pass; lowering itself always emits boxed `const` numbers. diff --git a/lib/eir/sink-construct.ts b/lib/eir/sink-construct.ts new file mode 100644 index 00000000..70f24baf --- /dev/null +++ b/lib/eir/sink-construct.ts @@ -0,0 +1,622 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Constructor-result sinking (docs/sinking-plan.md). +// +// A `new Point(x, y)` of a module-local, fence-passing constructor +// allocates an object whose fields are exactly the arguments — but the +// body's `this.x = x` stores are [[Set]] semantics, so deleting them +// statically is unsound: an accessor (or non-writable data property) +// later installed on the prototype chain must intercept every +// subsequent construction. The runtime's accessor epoch +// (_ejs_accessor_epoch, ejs-object.h) turns that global hazard into one +// load: while the epoch is still zero, NO user code has installed +// anything interception-capable anywhere, so the construct is +// observably equivalent to a fresh shaped literal of its arguments. +// +// A qualifying construct site is rewritten into an epoch-guarded +// diamond: +// +// %e = epoch_check +// cond_br %e -> ^virtual, ^slow +// ^virtual: a CLONE of the construct's use region, with the construct +// replaced by `make_object_shaped(args)` — non-escaping by the +// screens below, so the existing shaped-literal sinking drains +// the allocation, guards, and reads to pure data flow; +// ^slow: the ORIGINAL region, construct and real reads intact — +// interception semantics preserved from the first bumped epoch on. +// +// The screens are all fail-closed, and jointly guarantee the virtual +// clone's allocation always drains (all-or-nothing: a virtual arm that +// kept the allocation would carry the wrong prototype): +// +// - the callee resolves through a promoted (module-private) "%self" +// slot with a single closure store, and EVERY load of that slot is +// used only as a call/construct callee — which also proves the +// ctor's `.prototype` is never read or replaced (a swapped +// prototype could interpose an exotic object the epoch never sees); +// - the ctor's lowered body is exactly the born-with-shape fill +// diamond plus `return undefined`, its fill operands exactly the +// formals in order; the construct passes exactly that many args +// (a missing argument would change the runtime-derived shape); +// - the result's uses classify like the shaped-literal sink's, and a +// fold simulation (same guard-resolution rule as sinkShapedAlloc) +// proves every use either folds or sits in an arm the folded guards +// unreach; +// - the use region is a single-entry single-exit acyclic subgraph of +// plain br/cond_br blocks, so it can be duplicated wholesale. +// +// EJS_NO_CTOR_SINK=1 bisects this pass alone. + +import { Block, Func, Inst, Module, ShapeField } from "./ir"; +import { Effect, opInfo } from "./ops"; +import { computeRPO, computeDominators, dominates } from "./verifier"; + +// region size cap: a use region bigger than this is not a constructor +// kernel, and cloning it would bloat code for a marginal win +const REGION_BLOCK_CAP = 24; + +interface CtorMatch { + fn: Func; + shape: string; + fields: readonly ShapeField[]; +} + +// does the lowered function body consist of exactly the fenced +// constructor prefix — has_shape(this,"") diamond around a +// fill_object_shaped of the formals — and `return undefined`? +function matchShapedCtor(m: Module, fn: Func): CtorMatch | null { + if (fn.blocks.length !== 4 || fn.sig) return null; + const entry = fn.entry!; + if (entry.params.length < 3) return null; // [%env, %this, formals...] + if (entry.insts.length !== 2) return null; + const thisParam = entry.params[1]!; + + const guard = entry.insts[0]!; + const cbr = entry.insts[1]!; + if (guard.op !== "has_shape" || guard.imms["shape"] !== "") return null; + if (guard.operands[0] !== thisParam) return null; + if (cbr.op !== "cond_br" || cbr.operands[0] !== guard) return null; + + const fast = cbr.targets![0]!.block; + const slow = cbr.targets![1]!.block; + if (fast.params.length > 0 || slow.params.length > 0) return null; + + // fast arm: exactly the fill + br + if (fast.insts.length !== 2) return null; + const fill = fast.insts[0]!; + const fastBr = fast.insts[1]!; + if (fill.op !== "fill_object_shaped" || fill.targets) return null; + if (fastBr.op !== "br" || fastBr.targets![0]!.args.length > 0) return null; + const join = fastBr.targets![0]!.block; + if (join.params.length > 0) return null; + + const shape = fill.imms["shape"] as string; + const fields = m.shapes.get(shape); + if (!fields) return null; + const n = fields.length; + if (entry.params.length !== 2 + n) return null; + if (fill.operands.length !== 1 + n) return null; + if (fill.operands[0] !== thisParam) return null; + for (let i = 0; i < n; i++) if (fill.operands[i + 1] !== entry.params[i + 2]) return null; + + // slow arm: the sequential twin stores, one per field, then br join + if (slow.insts.length !== n + 1) return null; + for (let i = 0; i < n; i++) { + const s = slow.insts[i]!; + if (s.op !== "set_prop_atom" || s.targets) return null; + if (s.operands[0] !== thisParam || s.operands[1] !== entry.params[i + 2]) return null; + if (s.imms["atom"] !== fields[i]!.name) return null; + } + const slowBr = slow.insts[n]!; + if (slowBr.op !== "br" || slowBr.targets![0]!.block !== join) return null; + if (slowBr.targets![0]!.args.length > 0) return null; + + // join: return undefined, nothing else + if (join.insts.length !== 2) return null; + const undef = join.insts[0]!; + const ret = join.insts[1]!; + if (undef.op !== "const" || undef.imms["kind"] !== "undefined") return null; + if (ret.op !== "return" || ret.operands[0] !== undef) return null; + + return { fn, shape, fields }; +} + +// module-wide uses of every value, as (user, operandIndex) with -1 for +// branch-edge arguments — the specialization pass's shape +interface Use { + fn: Func; + user: Inst; + operandIndex: number; +} + +function usesInModule(m: Module): Map { + const uses = new Map(); + const add = (v: Inst, u: Use) => { + let list = uses.get(v); + if (!list) uses.set(v, (list = [])); + list.push(u); + }; + for (const fn of m.functions) { + fn.forEachInst((inst) => { + inst.operands.forEach((o, i) => add(o, { fn, user: inst, operandIndex: i })); + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) if (a) add(a, { fn, user: inst, operandIndex: -1 }); + }); + } + return uses; +} + +// the shaped-literal sink's repr-provability rule: folding a shape +// guard TRUE exposes raw f64 slot loads, so every f64 field's operand +// must provably be a number +function provablyNumber(v: Inst): boolean { + return v.op === "box_f64" || (v.op === "const" && v.imms["kind"] === "number"); +} + +// a resolved constructor slot: the closure store and the matched ctor +interface SlotCtor { + match: CtorMatch; + store: Inst; + storeFn: Func; + prefixSafe: boolean; +} + +// is `a` before `b` under the dominator tree of their shared function? +function comesBefore(idom: Map, a: Inst, b: Inst): boolean { + const ba = a.block!; + const bb = b.block!; + if (ba === bb) return ba.insts.indexOf(a) < bb.insts.indexOf(b); + return dominates(idom, ba, bb); +} + +interface Candidate { + fn: Func; + construct: Inst; + match: CtorMatch; +} + +interface Region { + blocks: Set; + exit: Block; +} + +// the single-entry single-exit acyclic region rooted at `entry` that +// contains every block of `useBlocks`. null when no such region exists +// (multiple exits, outside predecessors, cycles, non-branch +// terminators, catch blocks, or over the cap). +function computeRegion(entry: Block, useBlocks: Set): Region | null { + // predecessor closure from the uses up to the entry + const blocks = new Set([entry, ...useBlocks]); + const wl: Block[] = [...useBlocks]; + while (wl.length > 0) { + const b = wl.pop()!; + if (b === entry) continue; + for (const p of b.preds()) { + if (!blocks.has(p)) { + blocks.add(p); + wl.push(p); + if (blocks.size > REGION_BLOCK_CAP) return null; + } + } + } + // structural screens + the unique exit + let exit: Block | null = null; + for (const b of blocks) { + if (b.isCatch) return null; + const t = b.terminator; + if (!t || (t.op !== "br" && t.op !== "cond_br")) return null; + for (const inst of b.insts) if (inst !== t && inst.targets) return null; + if (b !== entry) { + for (const p of b.preds()) if (!blocks.has(p)) return null; + if (b.params.some((p) => p.isException)) return null; + } + for (const s of b.succs()) { + if (blocks.has(s)) continue; + if (exit && exit !== s) return null; + exit = s; + } + } + if (!exit) return null; + // acyclic + entry-reaches-all, by DFS with an on-stack set + const state = new Map(); // 1 = on stack, 2 = done + const visit = (b: Block): boolean => { + state.set(b, 1); + for (const s of b.succs()) { + if (!blocks.has(s)) continue; + const st = state.get(s); + if (st === 1) return false; // back edge: cycle + if (st === undefined && !visit(s)) return false; + } + state.set(b, 2); + return true; + }; + if (!visit(entry)) return null; + for (const b of blocks) if (state.get(b) !== 2) return null; // unreachable from entry + return { blocks, exit }; +} + +// simulate the shaped-literal sink's guard folding over the region: +// from `entry`, a cond_br whose condition is a sole-use has_shape guard +// on `result` takes only its statically resolved edge; everything else +// takes all in-region edges. Returns the reachable block set. +function foldReachable( + region: Region, + entry: Block, + result: Inst, + shape: string, + reprsProven: boolean, + guardOf: Map // cond_br -> its foldable has_shape guard +): Set { + const reach = new Set([entry]); + const wl: Block[] = [entry]; + while (wl.length > 0) { + const b = wl.pop()!; + const t = b.terminator!; + let succs: Block[]; + const guard = t.op === "cond_br" ? guardOf.get(t) : undefined; + if (guard && guard.operands[0] === result) { + const takeTrue = guard.imms["shape"] === shape && reprsProven; + succs = [t.targets![takeTrue ? 0 : 1]!.block]; + } else { + succs = b.succs(); + } + for (const s of succs) { + if (!region.blocks.has(s) || reach.has(s)) continue; + reach.add(s); + wl.push(s); + } + } + return reach; +} + +// rewrite every qualifying construct site in the module. Returns the +// number of sites rewritten; the caller re-runs the optimizer so the +// shaped-literal sink can drain the planted virtual allocations. +export function sinkConstructResults( + m: Module, + promotedSlots: Set, + toplevelName: string | null +): number { + if (process.env["EJS_NO_CTOR_SINK"]) return 0; + if (m.shapes.size === 0) return 0; + + const toplevelFn = toplevelName + ? m.functions.find((f) => f.name === toplevelName) || null + : null; + + // %self slot traffic, module-wide + const selfStores = new Map(); + const selfLoads = new Map(); + const storeFns = new Map(); + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.imms["module"] !== "%self") return; + const slot = inst.imms["slot"] as number; + if (inst.op === "module_slot_store") { + let l = selfStores.get(slot); + if (!l) selfStores.set(slot, (l = [])); + l.push(inst); + storeFns.set(inst, fn); + } else if (inst.op === "module_slot_load") { + let l = selfLoads.get(slot); + if (!l) selfLoads.set(slot, (l = [])); + l.push(inst); + } + }); + } + if (selfStores.size === 0) return 0; + + const uses = usesInModule(m); + const calleeUse = (u: Use): boolean => + u.operandIndex === 0 && + ((u.user.op === "call" && !u.user.imms["direct"]) || u.user.op === "construct"); + + // resolve each promoted slot that provably always holds one + // fence-passing constructor closure whose loads are all callees + const slotCtors = new Map(); + for (const [slot, stores] of selfStores) { + if (!promotedSlots.has(slot)) continue; + if (stores.length !== 1) continue; + const store = stores[0]!; + const closure = store.operands[0]!; + if (closure.op !== "make_closure") continue; + const ctorFn = m.functions.find((f) => f.name === closure.imms["fn"]); + if (!ctorFn) continue; + const match = matchShapedCtor(m, ctorFn); + if (!match) continue; + // every load only a callee; every OTHER use of the closure value + // is just the store itself (the specialization discipline — + // anything else could reach `.prototype`) + let ok = true; + for (const u of uses.get(closure) || []) { + if (u.user === store && u.operandIndex === 0) continue; + if (u.operandIndex === -1 || !calleeUse(u)) { + ok = false; + break; + } + } + if (ok) + for (const load of selfLoads.get(slot) || []) { + for (const lu of uses.get(load) || []) { + if (lu.operandIndex === -1 || !calleeUse(lu)) { + ok = false; + break; + } + } + if (!ok) break; + } + if (!ok) continue; + + const storeFn = storeFns.get(store)!; + // cross-function resolution needs the store to precede all user + // code: toplevel entry block, nothing CALL-shaped before it. + // (The specialization pass's rule; the loads themselves are + // pure so only calls could observe the slot in between.) + let prefixSafe = false; + if (toplevelFn && storeFn === toplevelFn && store.block === toplevelFn.entry) { + prefixSafe = true; + for (const inst of toplevelFn.entry!.insts) { + if (inst === store) break; + if ((opInfo(inst.op).effects & Effect.CALL) !== 0) { + prefixSafe = false; + break; + } + } + } + slotCtors.set(slot, { match, store, storeFn, prefixSafe }); + } + if (slotCtors.size === 0) return 0; + + // enumerate qualifying construct sites + const candidates: Candidate[] = []; + const idoms = new Map>(); + const idomOf = (fn: Func): Map => { + let d = idoms.get(fn); + if (!d) { + const { rpo } = computeRPO(fn); + idoms.set(fn, (d = computeDominators(fn, rpo))); + } + return d; + }; + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.op !== "construct" || (inst.targets && inst.targets.length > 0)) return; + const callee = inst.operands[0]!; + if (callee.op !== "module_slot_load" || callee.imms["module"] !== "%self") return; + const sc = slotCtors.get(callee.imms["slot"] as number); + if (!sc) return; + // the load must provably observe the (single) store + const orderOk = sc.prefixSafe + ? !( + callee.block === sc.store.block && + sc.store.block!.insts.indexOf(callee) < + sc.store.block!.insts.indexOf(sc.store) + ) + : fn === sc.storeFn && comesBefore(idomOf(fn), sc.store, callee); + if (!orderOk) return; + if (inst.operands.length - 1 !== sc.match.fields.length) return; + candidates.push({ fn, construct: inst, match: sc.match }); + }); + } + + // a successful sink splits/clones blocks, so the module-wide use map + // goes stale — rebuild it before judging the next site + let sunk = 0; + let freshUses = uses; + for (const c of candidates) { + if (sinkOneSite(c, freshUses)) { + sunk++; + freshUses = usesInModule(m); + } + } + return sunk; +} + +function sinkOneSite(c: Candidate, uses: Map): boolean { + const { fn, construct, match } = c; + const result = construct; + const shape = match.shape; + const fields = match.fields; + const args = construct.operands.slice(1); + + // classify the result's uses: shape guards whose sole consumer is + // their block's cond_br, slot loads, own-field atom reads. Anything + // else declines the site. + const resultUses = uses.get(result) || []; + const guardOf = new Map(); // cond_br -> guard + const useBlocks = new Set(); + const guards: Inst[] = []; + const slotReads: Inst[] = []; + const atomReads: Inst[] = []; + for (const u of resultUses) { + const { user, operandIndex } = u; + if (operandIndex === -1 || user.block === null) return false; + if (user.op === "has_shape" && operandIndex === 0) { + const gu = uses.get(user) || []; + const cbr = user.block.terminator; + if ( + gu.length !== 1 || + gu[0]!.user !== cbr || + gu[0]!.operandIndex !== 0 || + !cbr || + cbr.op !== "cond_br" + ) + return false; + guardOf.set(cbr, user); + guards.push(user); + } else if (user.op === "slot_load" && operandIndex === 0) { + slotReads.push(user); + } else if (user.op === "get_prop_atom" && operandIndex === 0) { + atomReads.push(user); + } else { + return false; + } + useBlocks.add(user.block); + } + if (useBlocks.size === 0) return false; // nothing to virtualize + + const region = computeRegion(construct.block!, useBlocks); + if (!region) return false; + + // fold simulation: every use must fold (guards resolve, reads fold + // to operands) or sit in an arm the folded guards make unreachable — + // the guarantee that the virtual clone's allocation fully drains + const reprsProven = fields.every( + (f, i) => f.repr !== "f64" || provablyNumber(args[i]!) + ); + const reach = foldReachable(region, construct.block!, result, shape, reprsProven, guardOf); + const fieldIndex = (name: string): number => { + for (let i = 0; i < fields.length; i++) if (fields[i]!.name === name) return i; + return -1; + }; + // (guards need no reachability screen: only sole-use cond_br guards + // got this far, and those always resolve statically) + for (const r of slotReads) { + if (!reach.has(r.block!)) continue; + if (r.targets) return false; + if (r.imms["shape"] !== shape) return false; + const k = r.imms["slot"] as number; + if (k < 0 || k >= fields.length) return false; + if (r.imms["repr"] === "f64" && !provablyNumber(args[k]!)) return false; + } + for (const r of atomReads) { + if (!reach.has(r.block!)) continue; + if (r.targets) return false; + if (fieldIndex(r.imms["atom"] as string) < 0) return false; // prototype read + } + + // live-outs: values defined in the region (below the construct) and + // used at-or-after the exit need a join param each + const regionDefs = new Set(); + const b0 = construct.block!; + const splitAt = b0.insts.indexOf(construct); + for (const b of region.blocks) { + for (const p of b.params) if (b !== b0) regionDefs.add(p); + const from = b === b0 ? splitAt : 0; + for (let i = from; i < b.insts.length; i++) regionDefs.add(b.insts[i]!); + } + const liveOuts: Inst[] = []; + for (const v of regionDefs) { + for (const u of uses.get(v) || []) { + if (u.user.block && !region.blocks.has(u.user.block)) { + // an i1 can never cross a block boundary, raw or joined + if (v.type === "i1") return false; + liveOuts.push(v); + break; + } + } + } + if (liveOuts.length > 0) { + // the exit's params can only absorb them if every exit + // predecessor is ours + for (const p of region.exit.preds()) if (!region.blocks.has(p)) return false; + } + + // ---- rewrite ------------------------------------------------- + // 1. split the construct's block: the head keeps everything before + // the construct and gains the epoch diamond; the tail (construct + // included) becomes the slow arm's entry. Successor predEdges + // reference terminator INSTRUCTIONS, so moving the instructions + // keeps the edge bookkeeping consistent. + const slowEntry = new Block(fn, "ctor_slow"); + slowEntry.sealed = true; + fn.blocks.push(slowEntry); + slowEntry.insts = b0.insts.splice(splitAt); + for (const inst of slowEntry.insts) inst.block = slowEntry; + + const cloneOf = new Map(); + const regionBlocks: Block[] = [slowEntry]; + for (const b of region.blocks) if (b !== b0) regionBlocks.push(b); + + // 2. clone the region; the construct becomes a shaped literal of + // the arguments + const valueMap = new Map(); + for (const b of regionBlocks) { + const cb = new Block(fn, "ctor_virtual"); + cb.sealed = true; + fn.blocks.push(cb); + cloneOf.set(b, cb); + for (const p of b.params) { + const cp = cb.addParam(p.nameHint); + cp.type = p.type; + cp.rawJoin = p.rawJoin; + valueMap.set(p, cp); + } + } + const mapVal = (v: Inst): Inst => valueMap.get(v) || v; + // live-out join params, appended to the exit's existing ones. The + // slow arm's exit edges pass the original values, the clone's edges + // the cloned ones; adding them BEFORE the clone's terminators exist + // extends only the original edges with the null slots filled here. + const exitParams = new Map(); + for (const v of liveOuts) { + const p = region.exit.addParam("ctor_sink"); + p.type = v.type; + p.rawJoin = v.type === "f64"; + exitParams.set(v, p); + for (const e of region.exit.predEdges) { + const t = e.inst.targets![e.targetIndex]!; + if (t.args[t.args.length - 1] === null) t.args[t.args.length - 1] = v; + } + } + for (const b of regionBlocks) { + const cb = cloneOf.get(b)!; + for (const inst of b.insts) { + let clone: Inst; + if (inst === construct) { + clone = new Inst(fn, "make_object_shaped", args.map(mapVal), { shape: shape }); + } else { + clone = new Inst(fn, inst.op, inst.operands.map(mapVal), { ...inst.imms }); + clone.type = inst.type; + } + clone.block = cb; + cb.insts.push(clone); + valueMap.set(inst, clone); + if (inst.targets) { + for (const t of inst.targets) { + // exit edges were already extended with the live-out + // args above, so mapping the originals covers them + const target = cloneOf.get(t.block) || t.block; + clone.addTarget(target, t.args.map((a) => (a ? mapVal(a) : a)), t.kind); + } + } + } + } + + // 3. the epoch diamond closes the head + const epoch = new Inst(fn, "epoch_check", [], {}); + epoch.block = b0; + b0.insts.push(epoch); + const cbr = new Inst(fn, "cond_br", [epoch], {}); + cbr.block = b0; + b0.insts.push(cbr); + cbr.addTarget(cloneOf.get(slowEntry)!, []); + cbr.addTarget(slowEntry, []); + + // 4. everything at or beyond the exit sees the live-outs through + // the new join params + if (liveOuts.length > 0) { + const cloneSet = new Set(cloneOf.values()); + fn.forEachInst((inst) => { + const b = inst.block; + if (!b || region.blocks.has(b) || b === slowEntry || cloneSet.has(b)) return; + for (let i = 0; i < inst.operands.length; i++) { + const p = exitParams.get(inst.operands[i]!); + if (p) inst.operands[i] = p; + } + if (inst.targets) + for (const t of inst.targets) + for (let i = 0; i < t.args.length; i++) { + const a = t.args[i]; + if (a) { + const p = exitParams.get(a); + if (p) t.args[i] = p; + } + } + }); + } + return true; +} diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index df986354..68ce7760 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -21,6 +21,7 @@ import { DesugarSpread } from "../passes/desugar-spread"; import { typeSigToEirType, typeSigToShapeRepr } from "./oracle"; import type { OracleShapeField, TypeOracle, TypeTag } from "./oracle"; import { optimizeShapeRegions } from "./optimize-guards"; +import { sinkConstructResults } from "./sink-construct"; import { buildArithDiamond, buildLowTierAdd, buildLowTierLt } from "./lowtier-probe"; import { DesugarClasses } from "../passes/desugar-classes"; import { DesugarDestructuring } from "../passes/desugar-destructuring"; @@ -3131,6 +3132,185 @@ test("sink-shaped: EJS_NO_SHAPED_SINK leaves the allocation alone", () => { } }); +// --- constructor-result sinking --------------------------------- + +// a hand-built module in the shape the sink requires: a fence-passing +// ctor, its closure stored once into promoted %self slot 0 by the +// toplevel, and a consumer constructing through the slot with guarded +// reads. the knobs each break exactly one screen. +interface CtorSinkOpts { + secondStore?: boolean; // a second store to the slot + protoWrite?: boolean; // a load used as a set_prop_atom base + trailingCtorCode?: boolean; // extra work after the ctor's fill join + swappedFill?: boolean; // fill operands not the formals in order + argcMismatch?: boolean; // construct passes fewer args than formals + escape?: boolean; // result also flows into a call + twoDiamonds?: boolean; // interleaved add whose value crosses the exit +} + +function buildCtorSinkModule(opts: CtorSinkOpts): { mod: Module; user: Func } { + const mod = new Module("ctor_sink_mod"); + const PXYKey = mod.internShape([ + { name: "x", repr: "f64" }, + { name: "y", repr: "f64" }, + ]); + mod.internShape([]); + + const cb = new FunctionBuilder("Point", ["%env", "%this", "x", "y"]); + const cthis = cb.fn.entry!.params[1]!; + const cx = cb.fn.entry!.params[2]!; + const cy = cb.fn.entry!.params[3]!; + const cfast = cb.newBlock("ctor_fill_fast"); + const cslow = cb.newBlock("ctor_fill_slow"); + const cjoin = cb.newBlock("ctor_fill_join"); + const cg = cb.emit("has_shape", [cthis], { shape: "" }); + cb.condBr(cg, cfast, [], cslow, []); + cb.sealBlock(cfast); + cb.sealBlock(cslow); + cb.setInsertPoint(cfast); + cb.emit("fill_object_shaped", opts.swappedFill ? [cthis, cy, cx] : [cthis, cx, cy], { + shape: PXYKey, + }); + cb.br(cjoin, []); + cb.setInsertPoint(cslow); + cb.emit("set_prop_atom", [cthis, cx], { atom: "x" }); + cb.emit("set_prop_atom", [cthis, cy], { atom: "y" }); + cb.br(cjoin, []); + cb.sealBlock(cjoin); + cb.setInsertPoint(cjoin); + if (opts.trailingCtorCode) cb.emit("get_prop_atom", [cthis], { atom: "x" }); + cb.ret(cb.constUndefined()); + mod.addFunction(cb.finish()); + + const tb = new FunctionBuilder("toplevel", ["%env", "%this"]); + const tenv = tb.fn.entry!.params[0]!; + const cl = tb.emit("make_closure", [tenv], { fn: "Point", name: "Point" }); + tb.emit("module_slot_store", [cl], { module: "%self", slot: 0 }); + if (opts.secondStore) tb.emit("module_slot_store", [cl], { module: "%self", slot: 0 }); + if (opts.protoWrite) { + const ld = tb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + tb.emit("set_prop_atom", [ld, tb.constNumber(1)], { atom: "prototype" }); + } + tb.ret(tb.constUndefined()); + mod.addFunction(tb.finish()); + + const ub = new FunctionBuilder("user", ["%env", "%this", "g"]); + const gparam = ub.fn.entry!.params[2]!; + const ld = ub.emit("module_slot_load", [], { module: "%self", slot: 0 }); + const bx = ub.emit("box_f64", [ub.emit("f64_const", [], { value: 1 })], {}); + const by = ub.emit("box_f64", [ub.emit("f64_const", [], { value: 2 })], {}); + const p = ub.emit("construct", opts.argcMismatch ? [ld, bx] : [ld, bx, by], {}); + + const fast = ub.newBlock("shape_fast"); + const slow = ub.newBlock("shape_slow"); + const join = ub.newBlock("shape_join"); + const r = join.addParam("r"); + const pg = ub.emit("has_shape", [p], { shape: PXYKey }); + ub.condBr(pg, fast, [], slow, []); + ub.sealBlock(fast); + ub.sealBlock(slow); + ub.setInsertPoint(fast); + const sl = ub.emit("slot_load", [p], { shape: PXYKey, slot: 0, repr: "f64" }); + sl.type = "f64"; + ub.br(join, [ub.emit("box_f64", [sl], {})]); + ub.setInsertPoint(slow); + ub.br(join, [ub.emit("get_prop_atom", [p], { atom: "x" })]); + ub.sealBlock(join); + ub.setInsertPoint(join); + + if (opts.twoDiamonds) { + // a value defined between the diamonds and used past the exit — + // it must cross the epoch join through a minted param + const s = ub.emit("add", [r, bx], {}); + const fast2 = ub.newBlock("shape_fast2"); + const slow2 = ub.newBlock("shape_slow2"); + const join2 = ub.newBlock("shape_join2"); + const r2 = join2.addParam("r2"); + const pg2 = ub.emit("has_shape", [p], { shape: PXYKey }); + ub.condBr(pg2, fast2, [], slow2, []); + ub.sealBlock(fast2); + ub.sealBlock(slow2); + ub.setInsertPoint(fast2); + const sl2 = ub.emit("slot_load", [p], { shape: PXYKey, slot: 1, repr: "f64" }); + sl2.type = "f64"; + ub.br(join2, [ub.emit("box_f64", [sl2], {})]); + ub.setInsertPoint(slow2); + ub.br(join2, [ub.emit("get_prop_atom", [p], { atom: "y" })]); + ub.sealBlock(join2); + ub.setInsertPoint(join2); + ub.ret(ub.emit("add", [s, r2], {})); + } else { + if (opts.escape) ub.emit("call", [gparam, ub.constUndefined(), p], {}); + ub.ret(r); + } + const user = ub.finish(); + mod.addFunction(user); + return { mod, user }; +} + +function runCtorSink(opts: CtorSinkOpts = {}): { n: number; printed: string; stats: OptStats } { + const { mod, user } = buildCtorSinkModule(opts); + verifyModule(mod); + const n = sinkConstructResults(mod, new Set([0]), "toplevel"); + verifyModule(mod); + const stats = optimizeFunction(user, mod); + verifyModule(mod); + return { n, printed: printFunction(user), stats }; +} + +test("sink-ctor: a qualifying construct virtualizes behind the epoch check", () => { + const { n, printed, stats } = runCtorSink({}); + assert(n === 1, `sunk=${n}`); + assertContains(printed, "epoch_check"); + assertContains(printed, "construct"); // the slow arm keeps the real one + assertNotContains(printed, "make_object_shaped"); // the virtual arm drained + assert(stats.shape_allocs_sunk === 1, `allocs=${stats.shape_allocs_sunk}`); +}); + +test("sink-ctor: live-outs cross the epoch join through minted params", () => { + const { n, printed, stats } = runCtorSink({ twoDiamonds: true }); + assert(n === 1, `sunk=${n}`); + assertContains(printed, "epoch_check"); + assertNotContains(printed, "make_object_shaped"); + assert(stats.shape_allocs_sunk === 1, `allocs=${stats.shape_allocs_sunk}`); +}); + +test("sink-ctor: refusals leave the construct alone", () => { + const attacks: CtorSinkOpts[] = [ + { secondStore: true }, + { protoWrite: true }, + { trailingCtorCode: true }, + { swappedFill: true }, + { argcMismatch: true }, + { escape: true }, + ]; + for (const a of attacks) { + const { n, printed } = runCtorSink(a); + assert(n === 0, `${JSON.stringify(a)}: sunk=${n}`); + assertNotContains(printed, "epoch_check"); + } +}); + +test("sink-ctor: a non-promoted slot declines", () => { + const { mod, user } = buildCtorSinkModule({}); + verifyModule(mod); + const n = sinkConstructResults(mod, new Set(), "toplevel"); + assert(n === 0, `sunk=${n}`); + verifyModule(mod); + assertNotContains(printFunction(user), "epoch_check"); +}); + +test("sink-ctor: EJS_NO_CTOR_SINK leaves the construct alone", () => { + process.env["EJS_NO_CTOR_SINK"] = "1"; + try { + const { n, printed } = runCtorSink({}); + assert(n === 0, `sunk=${n}`); + assertNotContains(printed, "epoch_check"); + } finally { + delete process.env["EJS_NO_CTOR_SINK"]; + } +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/runtime/ejs-init.c b/runtime/ejs-init.c index c2e8c4e9..9c8ce501 100644 --- a/runtime/ejs-init.c +++ b/runtime/ejs-init.c @@ -435,4 +435,12 @@ _ejs_init(int argc, char** argv) _ejs_gc_allocate_oom_exceptions(); EJS_INSTALL_ATOM_FUNCTION_FLAGS(_ejs__ejs, unhandledException, _ejs_unhandledException, 0); + + // builtin installs above (Object.prototype.__proto__ et al) predate + // user code and are audited against the virtualized-constructor + // contract (ejs-object.h): the only builtin accessor reachable from + // a fresh ordinary object's prototype chain is __proto__, a name the + // compiler's constructor fence never admits as a field. Everything + // after this point counts. + _ejs_accessor_epoch = 0; } diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 71696004..e39fae08 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -1198,6 +1198,10 @@ ejsval _ejs_Object EJSVAL_ALIGNMENT; ejsval _ejs_Object__proto__ EJSVAL_ALIGNMENT; ejsval _ejs_Object_prototype EJSVAL_ALIGNMENT; +// starts nonzero so a check that somehow runs before init completes +// fails closed; _ejs_init zeroes it once the builtins are in place +uint64_t _ejs_accessor_epoch = 1; + // ES2015, June 2015 // 19.1.1.1 Object ( [ value ] ) static EJS_NATIVE_FUNC(_ejs_Object_impl) { @@ -2304,6 +2308,10 @@ _ejs_object_specop_set_prototype_of (ejsval O, ejsval V) // 9. Set the value of the [[Prototype]] internal slot of O to V. + // A prototype swap can introduce intercepting properties (or an + // exotic object) into some fresh object's [[Set]] path — retire the + // virtualized-constructor fast path (ejs-object.h). + _ejs_accessor_epoch++; O_->proto = V; _ejs_gc_remember(O_, V); @@ -2572,6 +2580,22 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des if (_ejs_property_desc_has_getter(Desc)) _ejs_gc_remember(obj, Desc->getter); if (_ejs_property_desc_has_setter(Desc)) _ejs_gc_remember(obj, Desc->setter); + // a descriptor that could intercept a later [[Set]] through the + // prototype chain — an accessor, or a non-writable data property — + // retires the virtualized-constructor fast path (ejs-object.h). + // Only ORDINARY receivers count: a virtualized instance's chain is + // ctor.prototype -> Object.prototype, both ordinary, and any other + // object can only join such a chain through a [[SetPrototypeOf]] + // (which bumps unconditionally) or a ctor.prototype swap (which the + // compiler declines statically). Without this screen the fast path + // would die at startup: every closure's non-writable name/length + // and every module's export accessors land here. Bumping on a + // define that ends up rejected is merely conservative. + if (obj->ops == &_ejs_Object_specops && + (_ejs_property_desc_has_getter(Desc) || _ejs_property_desc_has_setter(Desc) || + (_ejs_property_desc_has_writable(Desc) && !_ejs_property_desc_is_writable(Desc)))) + _ejs_accessor_epoch++; + // shaped mode: route shaped objects up front. Plain default- // attribute data properties live in slot storage; anything the // shaped world can't express migrates to dictionary mode and falls diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index 7edc8750..b4e5490d 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -280,6 +280,16 @@ extern ejsval _ejs_Object__proto__; extern ejsval _ejs_Object_prototype; extern EJSSpecOps _ejs_Object_specops; +// the accessor epoch: 0 while no user code has installed anything that +// could intercept a [[Set]] on a fresh object's prototype chain — an +// accessor property, a non-writable data property, or a prototype swap. +// Compiled construct sites test `== 0` to run virtualized (allocation- +// free) constructor results; every intercept-capable installation +// retires that fast path process-wide by bumping the counter. Builtin +// init installs (e.g. Object.prototype.__proto__) predate the zeroing +// at the end of _ejs_init, so they never count. See docs/sinking-plan.md. +extern uint64_t _ejs_accessor_epoch; + void _ejs_object_init_proto(); ejsval _ejs_object_new (ejsval proto, EJSSpecOps* ops); diff --git a/runtime/ejs-proxy.c b/runtime/ejs-proxy.c index b5d44295..28d9b02c 100644 --- a/runtime/ejs-proxy.c +++ b/runtime/ejs-proxy.c @@ -160,6 +160,8 @@ _ejs_proxy_specop_get_prototype_of (ejsval O) static EJSBool _ejs_proxy_specop_set_prototype_of (ejsval O, ejsval V) { + // trapped proto swaps never reach the ordinary specop's bump + _ejs_accessor_epoch++; EJSProxy* proxy = EJSVAL_TO_PROXY(O); // 1. Assert: Either Type(V) is Object or Type(V) is Null. diff --git a/test/types/types-ctorsink1.js b/test/types/types-ctorsink1.js new file mode 100644 index 00000000..5361c53d --- /dev/null +++ b/test/types/types-ctorsink1.js @@ -0,0 +1,60 @@ +// constructor-result sinking probe (docs/sinking-plan.md): the alloc +// kernel virtualizes behind the accessor-epoch check, and the epoch +// must retire it the moment anything intercept-capable lands on the +// prototype chain. The interceptors are installed through +// Object.prototype — installing through Point.prototype would already +// decline the sink statically (the ctor's loads must all be callees), +// so this file exercises the RUNTIME half of the contract: a clean run +// first, then a mid-loop accessor install, then a mid-loop non-writable +// data install, each byte-compared against node. (defineProperty, not +// accessor literals — the oracle can't normalize the latter.) +function Point(x, y) { + this.x = x; + this.y = y; +} + +function run(n, flip, installer) { + var s = 0; + var i = 0; + while (i < n) { + if (i === flip) installer(); + var p = new Point(i, i + 1); + s = s + p.x + p.y; + i = i + 1; + } + return s; +} + +function nothing() {} + +function installAccessor() { + Object.defineProperty(Object.prototype, "x", { + configurable: true, + set: function (v) { + this.hx = v * 100; + }, + get: function () { + return this.hx + 7; + }, + }); +} + +function installFrozenData() { + Object.defineProperty(Object.prototype, "y", { + configurable: true, + value: 4242, + writable: false, + }); +} + +// clean epoch: the virtual arm runs the whole loop +console.log(run(1000, -1, nothing)); +// accessor lands at i===5: constructions from there on are intercepted +// (this.x = v stores hx, p.x reads hx + 7) +console.log(run(1000, 5, installAccessor)); +// still installed on later runs +console.log(run(10, -1, nothing)); +// a non-writable data property also intercepts: this.y = v is silently +// swallowed and p.y reads the prototype's 4242 +console.log(run(1000, 7, installFrozenData)); +console.log(run(10, -1, nothing)); diff --git a/test/types/types-ctorsink2.js b/test/types/types-ctorsink2.js new file mode 100644 index 00000000..ef1154a5 --- /dev/null +++ b/test/types/types-ctorsink2.js @@ -0,0 +1,58 @@ +// constructor-result sinking, the pure-win shape (docs/sinking-plan.md): +// a monomorphic alloc kernel with no interference anywhere — the +// canonical reduction is an allocation-free loop. Also exercises the +// declines around it: a site whose result escapes keeps its construct, +// and a ctor whose prototype is touched anywhere declines wholesale. +function Point(x, y) { + this.x = x; + this.y = y; +} + +function alloc(n) { + var s = 0; + var i = 0; + while (i < n) { + var p = new Point(i, i + 1); + s = s + p.x + p.y; + i = i + 1; + } + return s; +} + +// Escaper's result flows into a call: that site must keep its construct +function sink2_keep(p) { + return p.x; +} +function escaper(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + sink2_keep(new Point(i, i)); + i = i + 1; + } + return s; +} + +// Touched's prototype carries a method: the load discipline declines +// every Touched construct (a swapped or decorated prototype is exactly +// what the static screen exists for), and the method keeps working +function Touched(x, y) { + this.x = x; + this.y = y; +} +Touched.prototype.sum = function () { + return this.x + this.y; +}; +function methods(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + new Touched(i, i + 1).sum(); + i = i + 1; + } + return s; +} + +console.log(alloc(100000)); +console.log(escaper(1000)); +console.log(methods(1000)); From 15896f61418aac767ef7538f86c9281b056c1e58 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 26 Jul 2026 10:16:00 -0700 Subject: [PATCH 119/146] =?UTF-8?q?eir:=20sinking-P3=20=E2=80=94=20flow-se?= =?UTF-8?q?nsitive=20field=20writes,=20partial=20escapes,=20args=20length?= =?UTF-8?q?=20sinking?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit plans.md P5.3. Three pieces (docs/sinking-plan.md design + results): - lib/eir/sink-flow.ts: flow-sensitive scalar replacement of written object candidates (fold-false guard resolution via the twin-arm argument; Braun-style per-field renaming with minted boxed join params) and partial-escape materialization at a single escape site. All-or-nothing per candidate, plan-before-mutate, FLOW_REGION_CAP bounds the value-lifetime cost. EJS_NO_FLOW_SINK bisects. - arg_len op + _ejs_arg_length runtime helper: rest_args/args_obj used only for .length fold away (arguments is an unmapped argv snapshot; length is synthesized from argc). arg_load recorded-declined: OOB index reads walk the prototype chain, which the accessor epoch does not cover for writable integer data properties. EJS_NO_ARGS_SINK. - optimizer hygiene forced by the self-compile: one scan per round (scanRound gathers the use map + all sink candidates), bisect flags read once per optimizeFunction (process.env is a rebuild-the-environment getter under the self-hosted runtime), and an LOS bounds prefilter in ejs-gc.c — a partial mitigation of the conservative pin-scan cliff root-caused along the way and recorded as gc-P4's first order of business in gc-plan.md. Gates: 205 EIR unit tests; probes types-flowsink1/types-argsink1 node-identical (--types, flag-off, EJS_SHAPES=off, gc-stress, bisect compiles); --types diff lane 474 files 0-divergent (x2); matrix x7 green (stages at 421 pass / 22 xfail); types-bench4 0.04s vs 0.15s A/B (3.75x, node 0.20s); types-bench2 unchanged. Co-Authored-By: Claude Fable 5 --- docs/gc-plan.md | 27 ++ docs/plans.md | 2 +- docs/sinking-plan.md | 250 +++++++++++++++++- lib/eir/emit.ts | 10 + lib/eir/integrate.ts | 9 +- lib/eir/ops.ts | 7 + lib/eir/optimize.ts | 158 ++++++++++-- lib/eir/sink-flow.ts | 516 +++++++++++++++++++++++++++++++++++++ lib/eir/specialize.ts | 1 + lib/eir/tests.ts | 194 +++++++++++++- lib/runtime.ts | 10 + runtime/ejs-arguments.c | 11 + runtime/ejs-arguments.h | 1 + runtime/ejs-gc.c | 24 ++ test/types-argsink1.js | 30 +++ test/types-flowsink1.js | 71 +++++ test/types/types-bench4.js | 41 +++ 17 files changed, 1319 insertions(+), 43 deletions(-) create mode 100644 lib/eir/sink-flow.ts create mode 100644 test/types-argsink1.js create mode 100644 test/types-flowsink1.js create mode 100644 test/types/types-bench4.js diff --git a/docs/gc-plan.md b/docs/gc-plan.md index e8bca484..64c7bb5d 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -506,6 +506,33 @@ through Phase 3 for A/B and differential testing. demonstrated heap shrink on a fragmenting benchmark; auto-tuned growth target replaces the 60 MB constant, knob census = 1.** + **FIRST ORDER OF BUSINESS (measured 2026-07-25, while gating + sinking-P3): the conservative pin scan has a scaling cliff that + dominates self-compile wall time.** Evidence, so it isn't + re-derived: on the desugar.js-closure compile (20 modules), minor-GC + pin scans total 41–126 s of a 46–132 s wall — pauses grow from + <1 ms early to 500–860 ms during deep-recursion parse/lower phases. + Mechanism: `mark_ejsvals_in_range` treats every stack word as a raw + pointer candidate; the only rejection before the per-word arena + bsearch (and, before the sinking-P3-era fix, a LOCKED LINEAR walk of + the whole LOS list) is the `[conservative_lo, conservative_hi)` span + — and once a late arena or LOS mmap lands beyond the C/LLVM heap, + that span swallows it, so during codegen MILLIONS of stack words + pointing into LLVM's own allocations pass the prefilter. The cost + is therefore bistable per RUN (mmap layout luck: the same binary + compiles the same input in 6 s or 60 s) and quasi-deterministic per + BINARY (any allocation-pattern change — sinking-P3's was +1.4% + allocs — shifts when arenas are minted and can lock a binary into + the slow mode; its stage1 sat at ~1.5–2× baseline wall). A + bounds prefilter for the LOS walk (`los_lo/los_hi`, + ejs-gc.c) landed with sinking-P3; the real fixes belong here: + reserve arena address space once at init (span stays tight and + disjoint from the C heap forever, and arena lookup becomes two + compares + an index instead of a bsearch), and give the LOS a real + lookup structure (the P6.3 refactor). Self-compile wall time should + then sit at the fast mode (~6 s for the desugar closure) + deterministically — a bigger win than most optimizer phases. + - **gc-P5 — Shapes intersection (floats with maam P4).** When the shapes design lands, the collector consumes it: per-shape trace bitmaps replace `scan_type` + virtual `Scan`; inline-slot objects copy as memcpy + bitmap diff --git a/docs/plans.md b/docs/plans.md index facb2ddb..0489e5e8 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -81,7 +81,7 @@ Delete the allocations the mover made cheap. Detail: sinking-plan.md. (sinking-P1). - [x] **P5.2** epoch-guarded constructor-result sinking — the types-bench2 alloc loop (sinking-P2). -- [ ] **P5.3** flow-sensitive field writes, partial escapes, +- [x] **P5.3** flow-sensitive field writes, partial escapes, rest_args/args_obj (sinking-P3). - [ ] **P5.4** optimizer residue: SSA cleanups, type lattice, slot-load CSE for toplevel receivers (compiler-P1). diff --git a/docs/sinking-plan.md b/docs/sinking-plan.md index 59785242..5071fc41 100644 --- a/docs/sinking-plan.md +++ b/docs/sinking-plan.md @@ -4,8 +4,9 @@ Bucket plan; the ordering spine lives in `docs/plans.md`. Phase ids here are `sinking-P#` (formerly S1/S2/S3 in this doc's first revision). -Status: sinking-P1 LANDED (2026-07-25), sinking-P2 LANDED (2026-07-25) -— see the results sections at the bottom. Owner doc for extending +Status: sinking-P1 LANDED (2026-07-25), sinking-P2 LANDED (2026-07-25), +sinking-P3 LANDED (2026-07-25) — see the results sections at the +bottom. Owner doc for extending escape analysis + allocation sinking (docs/plans.md, optimization phase, first bullet) past what already exists. Written 2026-07-25, after gc-P2. @@ -168,15 +169,130 @@ allocations — gc-P2's nursery makes that a bump-pointer + minor-GC cost rather than a free-list cost, which is the composition the two plans always intended. -### sinking-P3 — recorded, not scheduled - -- Flow-sensitive field writes on sunk objects (SSA renaming per field; - today any write declines the candidate). -- Partial escapes / materialization points (allocate lazily on the - escaping path only) — subsumes the "options object passed onward - sometimes" pattern. -- `rest_args`/`args_obj` when only indexed or `.length`'d (plans.md - rung 4). +### sinking-P3 — flow-sensitive writes, partial escapes, args (P5.3) + +Design written 2026-07-25, scoped by two investigations recorded here +so the judgments survive: + +**(a) Flow-sensitive field writes** (`lib/eir/sink-flow.ts`). Lifts +the "any write declines" rule for `make_object` and +`make_object_shaped` candidates (arrays keep the length-write decline; +element writes can't reach a literal anyway). Two structural facts +make this cheap: + +- *Write diamonds are twins.* `propSet` lowers `o.f = v` to a + has_shape diamond whose fast arm slot_stores (a possibly-unboxed) `v` + and whose slow arm set_prop_atoms the same `v` — both arms store the + same source value, so the after-join tracked value is just `v`. + Field phis are needed only at REAL control joins (if/else writing + different values, loop headers), never per diamond. +- *Folding a shape guard FALSE is unconditionally sound* (the P1 twin + argument), independent of writes. A written candidate folds every + foldable guard false and resolves everything through the generic + arms; the memory ops then vanish entirely, so nothing is lost by + skipping the typed arms — the post-fixpoint rawJoin/guard-region + passes recover raw f64 flow on the *values* (which is where the + arithmetic lives once the object is gone). This avoids the + optimistic repr-invariance simulation folding TRUE would require + under writes (a set_prop_atom storing a non-number into an f64 field + repr-transitions the runtime shape). + +The pass is all-or-nothing per candidate (the ctor-sink discipline): +every use must be a foldable target-less read (own-key +get_prop_atom / const-index get_prop on objects), a deletable +target-less own-key write (set_prop_atom naming a literal key / shape +field — [[Set]] to an own writable data property on an unaliased +object is unobservable, the P1 semantics-note judgment; *non-own-key +writes decline*: a key-adding [[Set]] walks the prototype chain and is +only epoch-guardable, recorded below), a foldable guard, or (mode b) +the single escape. slot_stores are classified as pending writes in +round 1; guard fold-false unreaches them and the sweep removes them +before flow resolution — one surviving to the resolution round +(hand-built IR only) declines. Reaching values are computed per field +with a Braun-style renamer over the complete CFG (the builder's +algorithm, minus lazy sealing), minting boxed block params at joins; +plan-before-apply screens decline candidates whose walk region touches +catch blocks (unwind edges never carry the tracked value). A +slot_store's tracked value strips the store's `unbox_f64` (sound: the +diamond's has_tag proved numberness on that arm, so box(unbox(v)) is +v); reads fold to the reaching value at their program point. Bisect: +`EJS_NO_FLOW_SINK`. Telemetry: `flow_allocs_sunk` on the `EIR-opt:` +line. + +**(b) Partial escapes / materialization.** The same pass, one escape +allowed: a candidate whose non-read/write/guard uses are exactly ONE +instruction E materializes the object immediately before E (a fresh +`make_object`/`make_object_shaped` of the reaching field values — +the runtime re-derives the true shape from actual values, so +tracked-write repr drift is immaterial) and substitutes it into E's +operands/edge-args. Fail-closed screens, each with a recorded reason: + +- *No use reachable from E* (forward CFG walk from after-E, treating + entry into the alloc's block as a fresh-activation barrier): a read + after the escape would miss external mutations through the alias. +- *The same walk finding E again declines* (at-most-once per + activation): two materializations of one abstract object would split + its identity. +- At least one read folded or write deleted (else the rewrite is + churn — `return {…}` directly is already optimal). +- Own-key writes only, exactly as in (a). + +Identity/typeof/=== against the materialized object are correct by +construction: it IS the object, created at its last-possible point. + +**(c) `rest_args`/`args_obj` — length folds land; index folds +DECLINED.** Evidence from the runtime (2026-07-25): + +- `_ejs_arguments_new` COPIES argv (ejs-arguments.c:62) and is + unmapped; `.length` is synthesized from argc on every get; + callee/caller are poison accessors. `_ejs_array_new_copy` copies. + So `.length` of either object is exactly a function of the immutable + argc — foldable to a new `arg_len` op (imms.index; boxed + `max(argc - index, 0)`; effect NONE; emitted from the raw argc + calling-convention value, the rest_args precedent). +- Late argv reads WOULD be GC-safe (the conservative whole-stack scan + still covers the caller's args scratch and pins win over evacuation + — ejs-gc.c:1982-1989 — and generator bodies never see caller argv: + the desugar materializes arguments/rest in the outer function, so + they reach the body through env capture, which classifies as an + escape and declines). But an out-of-bounds `arguments[k]`/`rest[k]` + read falls through to the ordinary get path — the prototype chain — + and writable INTEGER DATA properties on Array.prototype / + Object.prototype do not bump `_ejs_accessor_epoch` + (ejs-object.c:2594's screen covers accessor/non-writable defines and + setPrototypeOf only). A sound `arg_load` therefore needs either a + new proto-index epoch class in the runtime or an epoch-guarded + region with an OOB helper (receiver-free data-prop lookup is only + sound while the accessor epoch is 0). Corpus census: const-index + arguments reads are rare and co-occur with uses that decline anyway + (iteration, aliasing tests); the recurring foldable pattern is + arity-check `.length`. Decision: implement `arg_len` only; record + `arg_load` here as declined-with-design until a workload justifies + the runtime extension. + +`arg_len` joins the inliner's and specializer's frame-op screens +(FRAME_OPS / CLONE_FRAME_OPS — it consumes the raw argc, which +neither an inlined body nor a specialized clone carries; clones can +never contain a minted arg_len since functions using arguments/rest +are never cloned, but the screens keep the invariant explicit). The +sink itself: a rest_args/args_obj whose every use is a target-less +`get_prop_atom "length"` folds those reads to `arg_len` and removes +the allocation in-pass (args_obj's THROW effect keeps it out of +generic DCE deliberately — the pass, having proven all uses folded, +removes it explicitly). Any other use — writes, computed reads, +`Symbol.iterator`, callee — declines. Fires on flag-off compiles too +(like the unshaped sink); the stage matrix is the gate. Bisect: +`EJS_NO_ARGS_SINK`; telemetry: `args_sunk`. + +**Still recorded, not scheduled** (sinking-P4 material): + +- Key-ADDING writes on sunk objects (epoch-guarded; subsumes the + `var o = {}; o.a = …` builder pattern under --types, where the + literal's birth shape lacks the written key). +- `arg_load` per the design above. +- Cross-block env scalar replacement (the same Braun machinery over + env slots; today `scalarReplaceEnvs` is same-block only) — belongs + with compiler-P1's SSA cleanups. - Cross-function sinking via inlining heuristics beyond the current single-block IIFE inliner (a multi-block inliner would let sinking-P2's "fill operands are formals" restriction relax to arbitrary ctor @@ -200,6 +316,19 @@ sinking-P2 (when built): everything above plus epoch-bump coverage tests and types-bench2 as the phase bench — target is the alloc() loop at kern parity (~0.3 s total, from 0.64 s). +sinking-P3: unit tests per feature with refusal attacks (non-own-key +write, use-after-escape, escape-in-loop-without-alloc, two escapes, +catch-block join, surviving slot_store, computed read on args, write +to rest, bisect hooks); semantic probes node-identical incl. +`EJS_SHAPES=off`, gc-stress (`EJS_GC_EVERY_N_ALLOC=101`), and +flag-compiled (`EJS_NO_FLOW_SINK` / `EJS_NO_ARGS_SINK`) exes — +probes must cover write-then-read-across-branches, loop accumulator +objects, escape-site identity (`===`, mutation through the escaped +alias), and arguments-length arity dispatch; --types diff lane +0-divergent; matrix ×7 (args/flow sinking fire flag-off, so the stage +lanes carry real weight here); a flow-sink loop-accumulator kernel as +the phase bench, A/B vs `EJS_NO_FLOW_SINK`. + ## sinking-P1 results (2026-07-25) Implementation: `sinkShapedAlloc` in lib/eir/optimize.ts, wired into @@ -301,6 +430,105 @@ never had diamonds) — all noise next to the construct it replaced. Recorded for later phases: slot-load licm and add-diamond coverage would shave the rest. +## sinking-P3 results (2026-07-25) + +Implementation, per the design above: + +- **Flow pass** (`lib/eir/sink-flow.ts`): planOne (classify + all + screens, zero mutation) → applyPlan (fold guards false, sweep, + Braun-rename per field with minted boxed join params + trivial-param + removal, fold reads, materialize at the single escape, delete writes + + alloc). Runs last in the optimizeFunction fixpoint round with its + own use scan, one rewrite per invocation. Bisect: + `EJS_NO_FLOW_SINK`; telemetry `flow_allocs_sunk` / + `allocs_materialized` (guard folds count into `shape_guards_sunk`). +- **Args sinking** (`sinkArgsObjects` in optimize.ts): new `arg_len` + op (emitted as a call to the new pure `_ejs_arg_length(argc, index)` + runtime helper — node-llvm has no SIToFP binding, so the int→boxed + conversion lives in C); rest_args/args_obj whose every use is a + target-less `.length` read fold and are removed in-pass. `arg_len` + joined FRAME_OPS and CLONE_FRAME_OPS. Bisect: `EJS_NO_ARGS_SINK`; + telemetry `args_sunk`. `arg_load` declined per the design section + (OOB prototype-read hazard uncovered by the epoch; census: rare). +- Two renamer bugs found by the stage1 self-compile, both worth + remembering: (1) the trivial-param scan judged a MID-FILL param + (`[null, X]` read as all-equal-X) — unfilled slots now decline + judgment; (2) a recursion frame's captured param could be forwarded + by a nested trivial-param cascade before installation (its + replaceAllUses runs too early to see the use) — a `forwarded` map + + `resolve()` at every install point closes it. + +Self-compile cost, and what it taught (the stage2 build initially ran +~2× slow; each finding below is now in the code): + +- **Never read process.env in the fixpoint** — under the self-hosted + runtime it is a rebuild-the-environment getter. All sink bisect + flags are read once per optimizeFunction (`SinkFlags`), which also + hoisted the pre-existing per-round `EJS_NO_SHAPED_SINK` read. +- **One scan per round** — the driver's `scanRound` gathers the use + map AND every sink pass's candidate list in a single `forEachInst` + walk; the flow pass consumes the shared map (type-only imports keep + optimize↔sink-flow acyclic at runtime) and does no scans of its own. +- **FLOW_REGION_CAP (32 blocks)** — sinking spreads field values + across the rename region as live SSA values, so a function-spanning + region trades one heap object for many long-lived gc-frame slots: + flow-sinking esprima's `scanPunctuator` token literal measurably + worsened every minor GC's conservative pin scan during parses. + Small regions (loop accumulators, builder tails) keep the win; the + self-compile census after the cap is 3 sites → 0–1 per big module. +- The remaining ~1.5–2× stage-self-compile wall delta is NOT the + passes (it persists with both bisect flags set): it is a + pre-existing, mmap-layout-bistable conservative-pin-scan cliff that + any allocation-pattern change (+1.4% allocs here) can tip — fully + root-caused and recorded as gc-P4's first order of business in + gc-plan.md, with a partial mitigation (the LOS bounds prefilter, + ejs-gc.c) landed in this phase. + +Gate evidence (all green, 2026-07-25): + +- 205 EIR unit tests (new: sink-flow ×8 — cross-branch phi, loop + accumulator, read-before-write, escape materialization, five-way + refusal sweep, catch-region decline, shaped partial escape, bisect + hook; sink-args ×4 — arguments/rest length folds, four-way refusal + sweep, bisect hook; the two sinking-P1-era "writes decline" pins now + assert the flow-sunk behavior with EJS_NO_FLOW_SINK variants + pinning the old decline). +- Probes `test/types-flowsink1.js` (branches, loop accumulator, + read-before-write, escape identity + mutation-through-alias, fresh + object per loop iteration, key-adding decline, try-write decline, + self-reference decline, and an Object.prototype setter intercepting + the declined key-adding write) and `test/types-argsink1.js` + (length-only folds incl. rest start index, computed-read / + forwarding / arrow-capture / generator declines): node-identical + under --types, flag-off, `EJS_SHAPES=off`, + `EJS_GC_EVERY_N_ALLOC=101`, and `EJS_NO_FLOW_SINK` / + `EJS_NO_ARGS_SINK` compiles. Probe telemetry: 6 flow-sunk + (3 materialized) / 5 args objects sunk; every refusal case declines. +- `--types` diff lane: 474 files, 473 identical, 0 divergent, 1 N/A + (tester.js, standing). (The P2-era 493 count included stale extra + copies in the old work tree; the tracked corpus is 472 + the two new + probes.) +- Matrix ×7 green (test-eir, lowtier, stages 0-3 at 421 pass / 22 + standing xfail / 0 fail each — the 419 + the two new probes — + shapes-off lane) — stage1/2/3 self-compiles carry the flow pass + live (post-cap it fires on the compiler's own classifier-record + pattern: object literal of arrays + flag, pushed into and + returned). +- **Phase bench `test/types/types-bench4.js`** (loop-accumulator + object, read+write per iteration, plus a partial-escape twin): + **0.04 s vs 0.15 s under EJS_NO_CTOR_SINK-style A/B + (`EJS_NO_FLOW_SINK` exes from the same tree), 3.75×; node warm is + 0.20 s** — the win is the per-iteration slot/diamond memory traffic + (GC profile: 625→585 allocs, the 40 per-call accumulator objects). +- types-bench2 unchanged at 0.27 s (0.26 s landed; noise). + +Recorded for sinking-P4 (see the design section's +"still recorded" list): key-adding writes under an epoch guard, +`arg_load`, cross-block env scalarization, multi-escape +materialization (each-path-at-most-once), and forwarding single-pred +join params left behind by the fold (LLVM collapses them today; an +EIR-level cleanup would help downstream passes see through). + Gate evidence: 187 EIR unit tests green (8 new: full sink, escape / call-operand / write / prototype-read / wrong-shape / hand-built unprovable-repr refusals, bisect hook); --types diff lane 485 diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 5e54ef13..d35638ba 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -1344,6 +1344,16 @@ export class EIREmitter { ); } + case "arg_len": { + // max(argc - index, 0) boxed, computed by a pure runtime + // helper (the argc register is the only input — no argv + // read, no allocation) + const index = (inst.imms["index"] as number) || 0; + const rv = this.call(rt.arg_length, [this.fn_argc, consts.int32(index)], "arg_len"); + this.values.set(inst, rv); + return rv; + } + case "prop_iter_new": { return this.emitCallLike( inst, diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 447058c3..9ea0a6e0 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -483,7 +483,9 @@ export function collectEIRToplevel( stats.shape_regions_merged || stats.shape_numeric_merged || stats.shape_allocs_sunk || - stats.shape_guards_sunk + stats.shape_guards_sunk || + stats.args_sunk || + stats.flow_allocs_sunk ) debug.log( 1, @@ -498,7 +500,10 @@ export function collectEIRToplevel( `${stats.shape_regions_merged} shape region(s) merged, ` + `${stats.shape_numeric_merged} shape+numeric region(s) merged, ` + `${stats.shape_allocs_sunk} shaped alloc(s) sunk, ` + - `${stats.shape_guards_sunk} shape guard branch(es) resolved` + `${stats.shape_guards_sunk} shape guard branch(es) resolved, ` + + `${stats.args_sunk} args object(s) sunk, ` + + `${stats.flow_allocs_sunk} flow-sunk alloc(s) ` + + `(${stats.allocs_materialized} materialized)` ); verifyModule(eir_module); diff --git a/lib/eir/ops.ts b/lib/eir/ops.ts index 6b37524b..3cfb0db4 100644 --- a/lib/eir/ops.ts +++ b/lib/eir/ops.ts @@ -170,6 +170,13 @@ export const OPS = { rest_args: { arity: 0, effects: E.GC, imms: ["index"] }, // the arguments object (built from the raw argc/args) args_obj: { arity: 0, effects: E.THROW | E.GC }, + // the argument count from imms.index onward, as a boxed number: + // max(argc - index, 0). Minted only by the optimizer's args sinking + // (a rest_args/args_obj whose only uses are `.length` reads folds to + // this and the allocation drains). Reads the immutable + // calling-convention argc — effect NONE — but it IS a frame op: + // never valid in specialized clones or across inlining. + arg_len: { arity: 0, effects: E.NONE, imms: ["index"] }, // --- for-in property iteration ------------------------------------------ // the iterator value is an opaque non-ejsval; it must only be consumed diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 952cad22..43807e70 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -30,6 +30,7 @@ import { sweepUnreachableBlocks, threadBooleanJoins, } from "./optimize-guards"; +import { sinkFlowAllocations } from "./sink-flow"; export interface OptStats { allocs_sunk: number; @@ -54,6 +55,14 @@ export interface OptStats { // and the shape guards on them resolved statically shape_allocs_sunk: number; shape_guards_sunk: number; + // rest_args/args_obj whose only uses were `.length`: reads folded + // to arg_len, allocation removed + args_sunk: number; + // flow-sensitive sinking (sink-flow.ts): written/partially-escaping + // allocations drained, and how many of those materialized a fresh + // object at their single escape site + flow_allocs_sunk: number; + allocs_materialized: number; } function newStats(): OptStats { @@ -73,11 +82,14 @@ function newStats(): OptStats { joins_threaded: 0, shape_allocs_sunk: 0, shape_guards_sunk: 0, + args_sunk: 0, + flow_allocs_sunk: 0, + allocs_materialized: 0, }; } // uses of `value` within fn, with enough position info to classify -interface Use { +export interface Use { inst: Inst; // operand index, or -1 for a branch-edge argument index: number; @@ -90,10 +102,26 @@ interface Use { // allocation churn are far more expensive than under V8. const EMPTY_USES: Use[] = []; -type UseMap = (Use[] | undefined)[]; +export type UseMap = (Use[] | undefined)[]; + +// per-round scan products: the use map plus every sink pass's +// candidate list, all gathered in ONE forEachInst walk. Under the +// self-hosted runtime each extra walk is real allocation churn +// (for-of iter results per element), and every extra allocation buys +// minor GCs whose conservative pin scans dominate deep-recursion +// compile phases — so the round does exactly one scan, shared. +interface RoundScan { + useMap: UseMap; + objAllocs: Inst[]; // make_object / make_array (sinkAllocations) + shapedAllocs: Inst[]; // make_object_shaped + argsAllocs: Inst[]; // rest_args / args_obj +} -function buildUseMap(fn: Func): UseMap { +function scanRound(fn: Func): RoundScan { const map: UseMap = new Array(fn.next_value_id); + const objAllocs: Inst[] = []; + const shapedAllocs: Inst[] = []; + const argsAllocs: Inst[] = []; const add = (v: Inst, inst: Inst, index: number) => { const list = map[v.id]; if (list) list.push({ inst, index }); @@ -104,11 +132,15 @@ function buildUseMap(fn: Func): UseMap { if (inst.targets) { for (const t of inst.targets) for (const a of t.args) if (a) add(a, inst, -1); } + const op = inst.op; + if (op === "make_object" || op === "make_array") objAllocs.push(inst); + else if (op === "make_object_shaped") shapedAllocs.push(inst); + else if (op === "rest_args" || op === "args_obj") argsAllocs.push(inst); }); - return map; + return { useMap: map, objAllocs, shapedAllocs, argsAllocs }; } -function usesOf(uses: UseMap, value: Inst): Use[] { +export function usesOf(uses: UseMap, value: Inst): Use[] { return uses[value.id] || EMPTY_USES; } @@ -452,14 +484,35 @@ function sinkShapedAlloc( return changed; } -function sinkAllocations(useMap: UseMap, fn: Func, m: Module | undefined, stats: OptStats): boolean { - const candidates: Inst[] = []; - const shaped: Inst[] = []; - const noShaped = !!process.env["EJS_NO_SHAPED_SINK"]; - fn.forEachInst((inst) => { - if (inst.op === "make_object" || inst.op === "make_array") candidates.push(inst); - else if (inst.op === "make_object_shaped" && !noShaped) shaped.push(inst); - }); +// the bisect-flag snapshot for one optimizeFunction run. process.env +// is a rebuild-the-whole-environment getter under the self-hosted +// runtime (node-compat), so the flags are read ONCE per function, never +// in the fixpoint rounds (found the hard way: the stage2 self-compile +// spent most of its wall time constructing env objects). +export interface SinkFlags { + noShaped: boolean; + noArgs: boolean; + noFlow: boolean; +} + +function readSinkFlags(): SinkFlags { + return { + noShaped: !!process.env["EJS_NO_SHAPED_SINK"], + noArgs: !!process.env["EJS_NO_ARGS_SINK"], + noFlow: !!process.env["EJS_NO_FLOW_SINK"], + }; +} + +function sinkAllocations( + useMap: UseMap, + fn: Func, + m: Module | undefined, + stats: OptStats, + noShaped: boolean, + candidates: Inst[], + shapedCandidates: Inst[] +): boolean { + const shaped = noShaped ? [] : shapedCandidates; let changed = false; for (const c of candidates) { if (!c.block) continue; // removed by an earlier candidate's fold @@ -474,6 +527,64 @@ function sinkAllocations(useMap: UseMap, fn: Func, m: Module | undefined, stats: return changed; } +// --- rest_args / args_obj length sinking ----------------------------------- +// +// The arguments object copies argv and synthesizes `.length` from the +// immutable calling-convention argc (before any map or prototype +// consultation); a rest array's length is max(argc - index, 0) at +// birth. So an allocation whose ONLY uses are target-less `.length` +// reads folds to the pure arg_len op and drains — soundly on any +// compile (no shapes involved). Everything else declines: writes +// (even length writes — a rest array's length is writable), computed +// reads (index folds are recorded-declined in docs/sinking-plan.md: +// an out-of-bounds read walks the prototype chain, which the accessor +// epoch does not cover for writable integer data properties), +// Symbol.iterator, callee, and any value/edge position. args_obj's +// THROW effect keeps it out of generic DCE; this pass, having proven +// every use folded, removes it explicitly. +function sinkArgsObjects( + useMap: UseMap, + fn: Func, + stats: OptStats, + candidates: Inst[] +): boolean { + let changed = false; + for (const alloc of candidates) { + if (!alloc.block) continue; + if (alloc.targets && alloc.targets.length > 0) continue; // block terminator in a try + const reads: Inst[] = []; + let ok = true; + for (const use of usesOf(useMap, alloc)) { + const { inst, index } = use; + if ( + index === 0 && + inst.op === "get_prop_atom" && + inst.imms.atom === "length" && + !inst.targets + ) { + reads.push(inst); + } else { + ok = false; + break; + } + } + if (!ok || reads.length === 0) continue; + const argIndex = alloc.op === "rest_args" ? (alloc.imms.index as number) : 0; + for (const read of reads) { + const al = new Inst(fn, "arg_len", [], { index: argIndex }); + const b = read.block!; + al.block = b; + b.insts.splice(b.insts.indexOf(read), 0, al); + foldRead(useMap, fn, read, al); + stats.reads_folded++; + } + removeInst(useMap, alloc); + stats.args_sunk++; + changed = true; + } + return changed; +} + // --- direct IIFE inlining ------------------------------------------------------ // the desugars (destructuring especially) wrap expression-position work @@ -489,6 +600,7 @@ function sinkAllocations(useMap: UseMap, fn: Func, m: Module | undefined, stats: const FRAME_OPS = new Set([ "args_obj", "rest_args", + "arg_len", "new_target", "construct_super", "construct_super_apply", @@ -848,6 +960,7 @@ function eliminateDead(fn: Func, stats: OptStats): boolean { export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): OptStats { const s = stats || newStats(); + const flags = readSinkFlags(); // to fixpoint: inlining an IIFE exposes its env and literals; // sinking an outer literal can un-escape one nested inside it (its // only use was as the outer's operand) @@ -855,11 +968,24 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O for (;;) { let changed = module ? inlineDirectCalls(module, fn, s) : false; if (eliminateDead(fn, s)) changed = true; // kill the closure before judging its env - // one use scan per round, kept accurate by the mutation helpers - const useMap = buildUseMap(fn); + // one scan per round (use map + every sink pass's candidates), + // kept accurate by the mutation helpers + const scan = scanRound(fn); + const useMap = scan.useMap; if (scalarReplaceEnvs(useMap, fn, s)) changed = true; if (foldIteratorWrappers(useMap, fn, s)) changed = true; - if (sinkAllocations(useMap, fn, module, s)) changed = true; + if (sinkAllocations(useMap, fn, module, s, flags.noShaped, scan.objAllocs, scan.shapedAllocs)) + changed = true; + if (!flags.noArgs && sinkArgsObjects(useMap, fn, s, scan.argsAllocs)) changed = true; + // flow-sensitive sinking (written / partially-escaping + // candidates). Runs LAST in the round sharing the same scan — + // it folds guard branches and mints join params, so nothing + // after it may consult the map this round + if ( + !flags.noFlow && + sinkFlowAllocations(fn, module, s, useMap, scan.objAllocs, scan.shapedAllocs) + ) + changed = true; // shaped sinking folds guard branches; reclaim the dead arms so // the next round's use map lets the alloc itself drain if (sweepUnreachableBlocks(fn)) changed = true; diff --git a/lib/eir/sink-flow.ts b/lib/eir/sink-flow.ts new file mode 100644 index 00000000..6f1f906e --- /dev/null +++ b/lib/eir/sink-flow.ts @@ -0,0 +1,516 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Flow-sensitive allocation sinking + partial-escape materialization +// (docs/sinking-plan.md, sinking-P3). +// +// Extends the flow-insensitive sinks in optimize.ts to object +// candidates WITH field writes, and to candidates with exactly one +// escaping use. Two structural facts carry the design: +// +// - propSet's write diamonds are twins: both arms store the same +// source value, so the after-join tracked value of a written field +// is just that value — field phis are needed only at REAL control +// joins (if/else arms writing different values, loop headers). +// - Folding a shape guard FALSE is unconditionally sound (the +// sinking-P1 twin argument), independent of writes. A written +// candidate folds every guard false and resolves everything +// through the generic arms; the memory ops then vanish entirely, +// and the post-fixpoint rawJoin/guard-region passes recover raw +// f64 flow on the values. (Folding TRUE under writes would need +// repr-invariance reasoning — a set_prop_atom storing a non-number +// into an f64 field repr-transitions the runtime shape.) +// +// The pass is all-or-nothing per candidate, and PLANS before it +// mutates: guard folding, though sound, routes the object generic, so +// a fold-then-decline would pessimize a surviving allocation. Only +// when every screen passes does the rewrite run: +// +// 1. fold each guard's branch to its false edge, sweep the dead arms; +// 2. Braun-rename each field over the folded CFG (boxed block params +// minted at joins, trivial ones removed) and fold every read to +// its reaching value; +// 3. (partial escape) materialize a fresh literal of the reaching +// field values immediately before the single escape instruction +// and substitute it there — the runtime re-derives the true shape +// from the actual values, so tracked-write repr drift is +// immaterial; +// 4. delete the writes and the allocation. +// +// Fail-closed screens, with the reasons recorded in sinking-plan.md: +// own-key target-less writes only (a key-adding [[Set]] walks the +// prototype chain); no computed reads; no catch blocks in the rename +// region (unwind edges never carry tracked values); no use reachable +// from the escape (a later read would miss mutations through the +// alias); the escape executes at most once per allocation (a forward +// walk from the escape that finds any use — itself included — without +// first re-entering the allocation's block declines); the escape +// instruction plays no second role (a `o.self = o` write-escape +// declines). +// +// EJS_NO_FLOW_SINK=1 bisects this pass alone. + +import { Block, Func, Inst, Module, replaceAllUses } from "./ir"; +// type-only imports: a value import would make optimize <-> sink-flow a +// runtime module cycle +import type { OptStats, Use, UseMap } from "./optimize"; +import { condBrToBr, sweepUnreachableBlocks } from "./optimize-guards"; + +// the driver's per-round use map, indexed by inst.id (see the +// allocation-churn note on scanRound in optimize.ts — this pass runs +// last in the round and does no scans of its own) +const NO_USES: Use[] = []; + +function usesOf(map: UseMap, v: Inst): Use[] { + return map[v.id] || NO_USES; +} + +// the candidate's field universe: names in literal order. Shaped +// allocations key off the module shape table; unshaped ones off +// imms.keys (duplicate keys collapse to the LAST position's value, the +// ownObjectValue rule). +interface FieldInfo { + names: string[]; + // field name -> operand index holding its initial value + initial: Map; +} + +function fieldsOf(m: Module | undefined, alloc: Inst): FieldInfo | null { + if (alloc.op === "make_object_shaped") { + if (!m) return null; + const fields = m.shapes.get(alloc.imms.shape as string); + if (!fields || fields.length !== alloc.operands.length) return null; + const initial = new Map(); + const names: string[] = []; + fields.forEach((f, i) => { + names.push(f.name); + initial.set(f.name, i); + }); + return { names, initial }; + } + // make_object + const keys = alloc.imms.keys as readonly string[]; + const initial = new Map(); + const names: string[] = []; + keys.forEach((k, i) => { + if (!initial.has(k)) names.push(k); + initial.set(k, i); // last definition wins + }); + // a __proto__ key is a prototype set, not a field; not ours + if (initial.has("__proto__")) return null; + return { names, initial }; +} + +// rename-region size cap (the ctor-sink REGION_BLOCK_CAP precedent, +// but for a COST model rather than a cloning one): sinking spreads the +// object's field values across the whole alloc-to-use region as live +// SSA values, so a large region trades one heap object for many +// long-lived gc-frame slots — measured on the stage1 self-compile, +// where flow-sinking esprima's scanPunctuator token literal (a +// function-spanning region) doubled the conservative pin-scan cost of +// every minor GC during parses and nearly doubled compile wall time. +// Small regions (loop accumulators, builder tails) keep the win. +const FLOW_REGION_CAP = 32; + +// the classified plan for one candidate; built without mutating +interface Plan { + guards: Inst[]; // has_shape, sole consumer its block's cond_br + reads: Inst[]; // reachable own-key get_prop_atom, target-less + writes: Inst[]; // reachable own-key set_prop_atom, target-less + escape: Inst | null; // the single escape instruction, if any + reachable: Set; // under folded guard branches +} + +// successors under the fold plan: a cond_br whose condition is one of +// the candidate's guards takes only its false edge +function foldedSuccs(b: Block, guardSet: Set): Block[] { + const t = b.terminator; + if (!t || !t.targets) return []; + if (t.op === "cond_br" && guardSet.has(t.operands[0]!)) return [t.targets[1]!.block]; + return t.targets.map((tg) => tg.block); +} + +function computeFoldedReachable(fn: Func, guardSet: Set): Set { + const reach = new Set([fn.entry!]); + const wl: Block[] = [fn.entry!]; + while (wl.length > 0) { + const b = wl.pop()!; + for (const s of foldedSuccs(b, guardSet)) { + if (!reach.has(s)) { + reach.add(s); + wl.push(s); + } + } + } + return reach; +} + +// classify + screen one candidate; null = decline (nothing mutated) +function planOne(useMap: UseMap, fields: FieldInfo, alloc: Inst, uses: Use[]): Plan | null { + const guards: Inst[] = []; + const guardSet = new Set(); + const reads: Inst[] = []; + const writes: Inst[] = []; + const slotOps: Inst[] = []; + const escapes = new Map(); // inst -> true (dedup multi-operand escapes) + const roles = new Map(); // 1=read/write, 2=escape (bitmask) + const fn = alloc.block!.fn; + + for (const use of uses) { + const { inst, index } = use; + if (inst.block === null) continue; // already removed elsewhere this round + if (index === -1) { + escapes.set(inst, true); + roles.set(inst, (roles.get(inst) ?? 0) | 2); + } else if (inst.op === "has_shape" && index === 0) { + // foldable only when its sole consumer is its block's cond_br + const guardUses = usesOf(useMap, inst); + if ( + guardUses.length === 1 && + guardUses[0]!.inst.op === "cond_br" && + guardUses[0]!.index === 0 && + guardUses[0]!.inst.block === inst.block + ) { + guards.push(inst); + guardSet.add(inst); + } else { + return null; // unfoldable guard keeps the object alive + } + } else if (inst.op === "get_prop_atom" && index === 0) { + if (inst.targets) return null; + if (!fields.initial.has(inst.imms.atom as string)) return null; // prototype read + reads.push(inst); + roles.set(inst, (roles.get(inst) ?? 0) | 1); + } else if (inst.op === "set_prop_atom" && index === 0) { + if (inst.targets) return null; + if (!fields.initial.has(inst.imms.atom as string)) return null; // key-adding write + writes.push(inst); + roles.set(inst, (roles.get(inst) ?? 0) | 1); + } else if ((inst.op === "slot_load" || inst.op === "slot_store") && index === 0) { + // these live in guarded fast arms; the fold must unreach them + slotOps.push(inst); + } else { + escapes.set(inst, true); + roles.set(inst, (roles.get(inst) ?? 0) | 2); + } + } + + // cheap pre-screen: pure-read candidates belong to the + // flow-insensitive sinks — skip the CFG walks entirely + if (writes.length === 0 && escapes.size === 0) return null; + + const reachable = computeFoldedReachable(fn, guardSet); + if (!reachable.has(alloc.block!)) return null; // dead code: not ours to judge + + // every slot op must die with its arm; a reachable one means the + // guard structure is not the lowering's (hand-built IR): decline + for (const s of slotOps) if (reachable.has(s.block!)) return null; + + const liveReads = reads.filter((r) => reachable.has(r.block!)); + const liveWrites = writes.filter((w) => reachable.has(w.block!)); + const liveEscapes = [...escapes.keys()].filter((e) => reachable.has(e.block!)); + + if (liveEscapes.length > 1) return null; + const escape = liveEscapes.length === 1 ? liveEscapes[0]! : null; + // the escape instruction must play no second role + if (escape && (roles.get(escape)! & 1) !== 0) return null; + + // this pass exists for writes and escapes; pure read candidates + // belong to the flow-insensitive sinks + if (liveWrites.length === 0 && !escape) return null; + // materializing at the escape must gain something + if (escape && liveWrites.length === 0 && liveReads.length === 0) return null; + + // no use may be reachable FROM the escape (post-escape reads would + // miss mutations through the alias; re-reaching the escape itself + // would split the object's identity). Re-entering the allocation's + // block starts a fresh activation and stops the walk. + if (escape) { + const useInsts = new Set([...guards, ...liveReads, ...liveWrites, escape]); + const eb = escape.block!; + const after = eb.insts.slice(eb.insts.indexOf(escape) + 1); + for (const i of after) if (useInsts.has(i)) return null; + const wl = foldedSuccs(eb, guardSet).filter((s) => s !== alloc.block); + const seen = new Set(wl); + while (wl.length > 0) { + const b = wl.pop()!; + if (!reachable.has(b)) continue; + for (const i of b.insts) if (useInsts.has(i)) return null; + for (const s of foldedSuccs(b, guardSet)) { + if (s === alloc.block || seen.has(s)) continue; + seen.add(s); + wl.push(s); + } + } + } + + // the rename region: reachable blocks the backward walk from the + // uses can visit, up to (and excluding past) the allocation's + // block. No catch blocks — an unwind edge can't carry a tracked + // value into a minted param. + const useBlocks = new Set(); + for (const i of [...liveReads, ...liveWrites]) useBlocks.add(i.block!); + if (escape) useBlocks.add(escape.block!); + const region = new Set(useBlocks); + const wl = [...useBlocks]; + while (wl.length > 0) { + const b = wl.pop()!; + if (b === alloc.block) continue; + for (const e of b.predEdges) { + const p = e.inst.block!; + if (!reachable.has(p) || region.has(p)) continue; + region.add(p); + wl.push(p); + } + } + for (const b of region) if (b.isCatch) return null; + if (region.size > FLOW_REGION_CAP) return null; + + return { guards, reads: liveReads, writes: liveWrites, escape, reachable }; +} + +// --- the rewrite ----------------------------------------------------------- + +// Braun-style per-field renaming over the (already folded and swept) +// CFG. Values are boxed SSA values; params minted at joins are boxed +// "any" params, verifier-legal on every edge. +class FieldRenamer { + private fn: Func; + private alloc: Inst; + private fields: FieldInfo; + // per block: candidate writes, relative order preserved + private writesIn = new Map(); + // field -> block -> value at block ENTRY (params minted here; this + // is the cycle-breaker memo, deliberately separate from the write + // scan so a block that both joins and writes resolves reads before + // its write to the entry value and reads after it to the write's) + private entryMemo = new Map>(); + // trivial-param forwarding chain. A recursion frame can capture a + // param that a NESTED cascade then removes — its replaceAllUses + // runs before the outer frame installs the stale capture — so + // every install point resolves through this map first. + private forwarded = new Map(); + + resolve(v: Inst): Inst { + for (;;) { + const n = this.forwarded.get(v); + if (!n) return v; + v = n; + } + } + + constructor(fn: Func, alloc: Inst, fields: FieldInfo, writes: Inst[]) { + this.fn = fn; + this.alloc = alloc; + this.fields = fields; + for (const w of writes) { + const b = w.block!; + let list = this.writesIn.get(b); + if (!list) this.writesIn.set(b, (list = [])); + list.push(w); + } + for (const list of this.writesIn.values()) + list.sort((a, b) => a.block!.insts.indexOf(a) - b.block!.insts.indexOf(b)); + } + + private memoFor(field: string): Map { + let m = this.entryMemo.get(field); + if (!m) this.entryMemo.set(field, (m = new Map())); + return m; + } + + // the reaching value at a program point: before insts[uptoIndex] of + // `block` (uptoIndex past the end = block exit) + valueAt(field: string, block: Block, uptoIndex: number): Inst { + const list = this.writesIn.get(block); + if (list) { + for (let i = list.length - 1; i >= 0; i--) { + const w = list[i]!; + if ((w.imms.atom as string) !== field) continue; + const wi = block.insts.indexOf(w); + if (wi >= 0 && wi < uptoIndex) return w.operands[1]!; + } + } + if (block === this.alloc.block) { + const ai = block.insts.indexOf(this.alloc); + if (ai >= 0 && ai < uptoIndex) + return this.alloc.operands[this.fields.initial.get(field)!]!; + } + return this.valueAtEntry(field, block); + } + + private valueAtEnd(field: string, block: Block): Inst { + return this.valueAt(field, block, block.insts.length); + } + + private valueAtEntry(field: string, block: Block): Inst { + const memo = this.memoFor(field); + const hit = memo.get(block); + if (hit) return this.resolve(hit); + + const preds = block.predEdges; + if (preds.length === 1) { + const v = this.resolve(this.valueAtEnd(field, preds[0]!.inst.block!)); + memo.set(block, v); + return v; + } + + // join: mint a boxed param, memoized BEFORE recursing so loop + // back-edges resolve to it. argIndexOfParam is recomputed per + // edge — a trivial-param removal during the recursion can + // renumber this block's params — and the dependent-recheck + // cascade can forward THIS param mid-fill, in which case the + // memo already holds its replacement. + const param = block.addParam("sink_" + field); + memo.set(block, param); + for (const e of preds) { + const v = this.resolve(this.valueAtEnd(field, e.inst.block!)); + if (param.removed) break; + e.inst.targets![e.targetIndex]!.args[block.argIndexOfParam(param)] = v; + } + if (param.removed) return this.resolve(memo.get(block)!); + return this.tryRemoveTrivialParam(param); + } + + // the builder's trivial-param rule: a param whose incoming + // arguments are all the same value (or itself) forwards that value. + // Dependent sink params (which may use this one as an edge + // argument) are rechecked after the forward. + private tryRemoveTrivialParam(param: Inst): Inst { + if (param.removed) return param; + const block = param.block!; + const argIdx = block.argIndexOfParam(param); + let same: Inst | null = null; + for (const e of block.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; + // an unfilled slot means the param is mid-fill higher up + // the recursion — never judge it yet + if (!arg) return param; + if (arg === same || arg === param) continue; + if (same !== null) return param; + same = arg; + } + if (same === null) return param; + same = this.resolve(same); + + replaceAllUses(this.fn, param, same); + this.forwarded.set(param, same); + const dependents: Inst[] = []; + for (const m of this.entryMemo.values()) + for (const [b, v] of m.entries()) + if (v === param) { + m.set(b, same); + } else if (v.op === "blockparam" && !v.removed && v !== param) { + dependents.push(v); + } + block.removeParam(param); + for (const d of dependents) if (!d.removed) this.tryRemoveTrivialParam(d); + return same; + } +} + +function removeFromBlock(inst: Inst): void { + const b = inst.block!; + const idx = b.insts.indexOf(inst); + if (idx >= 0) b.insts.splice(idx, 1); + inst.block = null; +} + +function applyPlan( + fn: Func, + fields: FieldInfo, + alloc: Inst, + plan: Plan, + stats: OptStats +): void { + // 1. fold the guard branches false and reclaim the dead arms (this + // disconnects every slot op and the fast-arm halves of the + // read/write diamonds; predEdges stay consistent for the renamer) + for (const g of plan.guards) { + const block = g.block!; + const cbr = block.terminator; + if (!cbr || cbr.op !== "cond_br" || cbr.operands[0] !== g) continue; + condBrToBr(fn, block, 1); + stats.shape_guards_sunk++; + } + sweepUnreachableBlocks(fn); + + const renamer = new FieldRenamer(fn, alloc, fields, plan.writes); + + // 2. fold every read to its reaching value + for (const read of plan.reads) { + if (!read.block) continue; // swept + const v = renamer.resolve( + renamer.valueAt(read.imms.atom as string, read.block, read.block.insts.indexOf(read)) + ); + replaceAllUses(fn, read, v); + removeFromBlock(read); + stats.reads_folded++; + } + + // 3. materialize at the single escape, if any + if (plan.escape && plan.escape.block) { + const e = plan.escape; + const eb = e.block!; + const at = eb.insts.indexOf(e); + // resolve AFTER all valueAt calls: a later field's renaming can + // forward a param an earlier field's value captured + const values = ( + alloc.op === "make_object_shaped" + ? fields.names + : (alloc.imms.keys as readonly string[]) + ) + .map((k) => renamer.valueAt(k, eb, at)) + .map((v) => renamer.resolve(v)); + const made = + alloc.op === "make_object_shaped" + ? new Inst(fn, "make_object_shaped", values, { shape: alloc.imms.shape }) + : new Inst(fn, "make_object", values, { keys: alloc.imms.keys }); + made.block = eb; + eb.insts.splice(at, 0, made); + for (let i = 0; i < e.operands.length; i++) if (e.operands[i] === alloc) e.operands[i] = made; + if (e.targets) + for (const t of e.targets) + for (let i = 0; i < t.args.length; i++) if (t.args[i] === alloc) t.args[i] = made; + stats.allocs_materialized++; + } + + // 4. the writes and the allocation go + for (const w of plan.writes) if (w.block) removeFromBlock(w); + removeFromBlock(alloc); + stats.flow_allocs_sunk++; +} + +// try to flow-sink candidates in `fn`; at most ONE rewrite per call +// (the rewrite reshapes the CFG, so later candidates re-plan against +// fresh state on the driver's next fixpoint round). The bisect flag +// (EJS_NO_FLOW_SINK) is read by the driver, not here (SinkFlags note), +// and the use map + candidate lists come from the driver's single +// per-round scan — this pass MUTATES without maintaining the map, so +// it must stay the round's last consumer. Returns whether anything +// changed. +export function sinkFlowAllocations( + fn: Func, + m: Module | undefined, + stats: OptStats, + useMap: UseMap, + objCandidates: Inst[], + shapedCandidates: Inst[] +): boolean { + const tryOne = (alloc: Inst): boolean => { + if (!alloc.block) return false; + const fields = fieldsOf(m, alloc); + if (!fields) return false; + const plan = planOne(useMap, fields, alloc, usesOf(useMap, alloc)); + if (!plan) return false; + applyPlan(fn, fields, alloc, plan, stats); + return true; + }; + for (const alloc of objCandidates) { + if (alloc.op !== "make_object") continue; // make_array: not ours + if (tryOne(alloc)) return true; + } + if (m) for (const alloc of shapedCandidates) if (tryOne(alloc)) return true; + return false; +} diff --git a/lib/eir/specialize.ts b/lib/eir/specialize.ts index 887a636b..afcf46e0 100644 --- a/lib/eir/specialize.ts +++ b/lib/eir/specialize.ts @@ -134,6 +134,7 @@ function ownReturns(fnNode: e.Function): e.ReturnStatement[] { const CLONE_FRAME_OPS = new Set([ "args_obj", "rest_args", + "arg_len", "new_target", "construct_super", "construct_super_apply", diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 68ce7760..d16febcc 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -861,10 +861,31 @@ test("optimize: write-only object literal dies with its stores", () => { assertNotContains(printed, "set_prop_atom"); }); -test("optimize: a written key blocks folding its reads", () => { - let { printed } = lowerAndOptimize("function f(x) { let o = { a: 1 }; o.a = x; return o.a; }"); - assertContains(printed, "make_object"); - assertContains(printed, "get_prop_atom"); +test("optimize: a written key's reads fold flow-sensitively (sinking-P3)", () => { + // the read after the write sees the written value; the store and + // the allocation drain + let { fn, printed } = lowerAndOptimize( + "function f(x) { let o = { a: 1 }; o.a = x; return o.a; }" + ); + assertNotContains(printed, "make_object"); + assertNotContains(printed, "get_prop_atom"); + assertNotContains(printed, "set_prop_atom"); + let ret: Inst | null = null; + fn.forEachInst((i) => { if (i.op === "return") ret = i; }); + assert(ret!.operands[0]!.op === "blockparam", "return should see the written param x"); +}); + +test("optimize: EJS_NO_FLOW_SINK restores the written-key decline", () => { + process.env["EJS_NO_FLOW_SINK"] = "1"; + try { + let { printed } = lowerAndOptimize( + "function f(x) { let o = { a: 1 }; o.a = x; return o.a; }" + ); + assertContains(printed, "make_object"); + assertContains(printed, "get_prop_atom"); + } finally { + delete process.env["EJS_NO_FLOW_SINK"]; + } }); test("optimize: non-own-key read keeps the object (prototype chain)", () => { @@ -2389,6 +2410,9 @@ function shapeOptStats(): OptStats { joins_threaded: 0, shape_allocs_sunk: 0, shape_guards_sunk: 0, + args_sunk: 0, + flow_allocs_sunk: 0, + allocs_materialized: 0, }; } @@ -2997,7 +3021,7 @@ test("born-verify: a boxed value into an f64 slot rejects by type", () => { // --- shaped-literal sinking ----------------------------------- -function lowerShapedSink(src: string): { printed: string; stats: OptStats } { +function lowerShapedSink(src: string): { fn: Func; printed: string; stats: OptStats } { const r = lowerFunctionNode( parseFn(src), undefined, @@ -3006,7 +3030,7 @@ function lowerShapedSink(src: string): { printed: string; stats: OptStats } { verifyModule(r.module); const stats = optimizeFunction(r.fn, r.module); verifyModule(r.module); - return { printed: printFunction(r.fn), stats }; + return { fn: r.fn, printed: printFunction(r.fn), stats }; } test("sink-shaped: a non-escaping guarded literal scalar-replaces completely", () => { @@ -3040,15 +3064,34 @@ test("sink-shaped: a call-operand use escapes", () => { assertContains(printed, "make_object_shaped"); }); -test("sink-shaped: a written literal declines wholesale", () => { - // the store lowers to a slot_store/set_prop_atom use of o — v1 treats - // every write as an escape (a write would also invalidate the static - // guard resolution) - const { printed, stats } = lowerShapedSink( +test("sink-shaped: a written literal flow-sinks through the generic arms (sinking-P3)", () => { + // the store's diamond guards fold FALSE (twin arms; sound under + // writes), the generic read folds to the written const, and the + // allocation drains + const { fn, printed, stats } = lowerShapedSink( "function f(a, b) { var o = { x: 1, y: a, s: b }; o.x = 2; return o.x; }" ); - assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); - assertContains(printed, "make_object_shaped"); + assert(stats.flow_allocs_sunk === 1, `flow_sunk=${stats.flow_allocs_sunk}`); + assertNotContains(printed, "make_object_shaped"); + assertNotContains(printed, "slot_store"); + assertNotContains(printed, "set_prop_atom"); + assertNotContains(printed, "get_prop_atom"); + // the written const reaches the return (possibly through the read + // diamond's now-single-pred join param — LLVM collapses those) + assertContains(printed, 'value=2'); +}); + +test("sink-shaped: EJS_NO_FLOW_SINK restores the written-literal decline", () => { + process.env["EJS_NO_FLOW_SINK"] = "1"; + try { + const { printed, stats } = lowerShapedSink( + "function f(a, b) { var o = { x: 1, y: a, s: b }; o.x = 2; return o.x; }" + ); + assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); + assertContains(printed, "make_object_shaped"); + } finally { + delete process.env["EJS_NO_FLOW_SINK"]; + } }); test("sink-shaped: a non-own read blocks removal but own reads still fold", () => { @@ -3132,6 +3175,131 @@ test("sink-shaped: EJS_NO_SHAPED_SINK leaves the allocation alone", () => { } }); +// --- flow-sensitive sinking + partial escapes (sinking-P3) ------------------ + +test("sink-flow: writes across branches fold through a minted join param", () => { + let { printed } = lowerAndOptimize( + "function f(c, x, y) { let o = { a: 0 }; if (c) o.a = x; else o.a = y; return o.a; }" + ); + assertNotContains(printed, "make_object"); + assertNotContains(printed, "set_prop_atom"); + assertNotContains(printed, "get_prop_atom"); +}); + +test("sink-flow: a loop accumulator object drains (loop-carried param)", () => { + let { printed } = lowerAndOptimize( + "function f(n) { let o = { sum: 0 }; for (let i = 0; i < n; i = i + 1) o.sum = o.sum + i; return o.sum; }" + ); + assertNotContains(printed, "make_object"); + assertNotContains(printed, "set_prop_atom"); + assertNotContains(printed, "get_prop_atom"); +}); + +test("sink-flow: a read before the write sees the initial value", () => { + let { fn, printed } = lowerAndOptimize( + "function f(x) { let o = { a: 5 }; let r = o.a; o.a = x; return r; }" + ); + assertNotContains(printed, "make_object"); + let ret: Inst | null = null; + fn.forEachInst((i) => { if (i.op === "return") ret = i; }); + assert( + ret!.operands[0]!.op === "const" && ret!.operands[0]!.imms.value === 5, + `expected the initial 5, got ${ret!.operands[0]!.op}` + ); +}); + +test("sink-flow: single escape materializes at the escape site", () => { + // the write is baked into the materialized literal; the original + // allocation and store are gone but a make_object survives AT the + // call + let { fn, printed } = lowerAndOptimize( + "function f(g, x) { let o = { a: 1 }; o.a = x; g(o); return 0; }" + ); + assertContains(printed, "make_object"); + assertNotContains(printed, "set_prop_atom"); + // the materialized literal's operand is the written value (param x) + let made: Inst | null = null; + fn.forEachInst((i) => { if (i.op === "make_object") made = i; }); + assert(made!.operands[0]!.op === "blockparam", "materialized field should be the written x"); +}); + +test("sink-flow: refusals leave the object alone", () => { + const cases: [string, string][] = [ + // a read reachable from the escape (the alias could mutate) + ["use after escape", "function f(g) { let o = { a: 1 }; o.a = 2; g(o); return o.a; }"], + // the escape can re-execute without re-executing the alloc + ["escape in loop", "function f(g, n) { let o = { a: 1 }; o.a = 2; for (let i = 0; i < n; i = i + 1) g(o); return 0; }"], + // two distinct escape instructions + ["two escapes", "function f(g, h, c) { let o = { a: 1 }; o.a = 2; if (c) g(o); else h(o); return 0; }"], + // key-adding write ([[Set]] walks the prototype chain) + ["key-adding write", "function f(x) { let o = { a: 1 }; o.b = x; return 0; }"], + // the escape instruction is itself a write (o.self = o) + ["self-write escape", "function f() { let o = { a: 1 }; o.a = o; return 0; }"], + ]; + for (const [name, src] of cases) { + let { printed } = lowerAndOptimize(src); + if (printed.indexOf("make_object") === -1) + throw new Error(`refusal '${name}' unexpectedly sank\n---\n${printed}\n---`); + } +}); + +test("sink-flow: a catch block in the rename region declines", () => { + let { printed } = lowerAndOptimize( + "function f(x) { let o = { a: 1 }; try { o.a = x; } catch (e) { } return o.a; }" + ); + assertContains(printed, "make_object"); +}); + +test("sink-flow: shaped partial escape materializes a shaped literal", () => { + const { printed, stats } = lowerShapedSink( + "function f(a, b, g) { var o = { x: 1, y: a, s: b }; o.x = 2; g(o); return 0; }" + ); + assert(stats.flow_allocs_sunk === 1, `flow_sunk=${stats.flow_allocs_sunk}`); + assert(stats.allocs_materialized === 1, `materialized=${stats.allocs_materialized}`); + assertContains(printed, "make_object_shaped"); // the materialized one + assertNotContains(printed, "slot_store"); + assertNotContains(printed, "set_prop_atom"); +}); + +// --- rest_args / args_obj length sinking (sinking-P3) ----------------------- + +test("sink-args: length-only arguments folds to arg_len and drains", () => { + let { printed } = lowerAndOptimize("function f() { return arguments.length; }"); + assertContains(printed, "arg_len"); + assertNotContains(printed, "args_obj"); +}); + +test("sink-args: length-only rest folds with its start index", () => { + let { printed } = lowerAndOptimize("function f(a, b, ...rest) { return rest.length; }"); + assertContains(printed, "arg_len"); + assertContains(printed, "index=2"); + assertNotContains(printed, "rest_args"); +}); + +test("sink-args: refusals keep the allocation", () => { + const cases = [ + "function f() { return arguments[0]; }", // computed read + "function f() { return arguments; }", // escape + "function f(...r) { r.length = 0; return r.length; }", // length write + "function f(...r) { return r.length + r[0]; }", // partial fold is not enough + ]; + for (const src of cases) { + let { printed } = lowerAndOptimize(src); + assertNotContains(printed, "arg_len"); + } +}); + +test("sink-args: EJS_NO_ARGS_SINK leaves the allocation alone", () => { + process.env["EJS_NO_ARGS_SINK"] = "1"; + try { + let { printed } = lowerAndOptimize("function f() { return arguments.length; }"); + assertContains(printed, "args_obj"); + assertNotContains(printed, "arg_len"); + } finally { + delete process.env["EJS_NO_ARGS_SINK"]; + } +}); + // --- constructor-result sinking --------------------------------- // a hand-built module in the shape the sink requires: a fence-passing diff --git a/lib/runtime.ts b/lib/runtime.ts index f4ae09b1..5353245a 100644 --- a/lib/runtime.ts +++ b/lib/runtime.ts @@ -238,6 +238,16 @@ const runtime_interface = { [ty.Int32, ty.EjsValue.pointerTo()] ); }, + arg_length: function (this: RuntimeContext) { + return does_not_throw( + does_not_access_memory( + this.abi.createExternalFunction(this.module, "_ejs_arg_length", ty.EjsValue, [ + ty.Int32, + ty.Int32, + ]) + ) + ); + }, number_new: function (this: RuntimeContext) { return does_not_throw( does_not_access_memory( diff --git a/runtime/ejs-arguments.c b/runtime/ejs-arguments.c index d5a2e1e4..76f2fedb 100644 --- a/runtime/ejs-arguments.c +++ b/runtime/ejs-arguments.c @@ -63,6 +63,17 @@ _ejs_arguments_new (int numElements, ejsval* args) return OBJECT_TO_EJSVAL(arguments); } +// the compiler's arg_len op: the length the arguments object (or the +// rest array starting at `index`) would report for a call that arrived +// with `argc` arguments, without materializing either object. Minted +// by the EIR args sinking (docs/sinking-plan.md, sinking-P3) when the +// object's only uses are `.length` reads. +ejsval +_ejs_arg_length (uint32_t argc, uint32_t index) +{ + return NUMBER_TO_EJSVAL(argc > index ? (double)(argc - index) : 0); +} + void _ejs_arguments_init(ejsval global) { diff --git a/runtime/ejs-arguments.h b/runtime/ejs-arguments.h index 47040396..e5fea30c 100644 --- a/runtime/ejs-arguments.h +++ b/runtime/ejs-arguments.h @@ -31,6 +31,7 @@ extern EJSSpecOps _ejs_Arguments_specops; void _ejs_arguments_init(ejsval global); ejsval _ejs_arguments_new (int numElements, ejsval* args); +ejsval _ejs_arg_length (uint32_t argc, uint32_t index); EJS_END_DECLS diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 8b86936d..8e8f9813 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -298,6 +298,25 @@ conservative_bounds_add(void* start, size_t size) if ((char*)start + size > conservative_hi) conservative_hi = (char*)start + size; } +// LOS-only bounds, the second-stage prefilter: a conservative candidate +// inside [conservative_lo, conservative_hi) that resolves to no arena +// used to take a LOCKED LINEAR WALK of the whole LOS list — per stack +// word. With arenas and LOS blocks scattered by mmap, a deep-recursion +// minor GC could spend hundreds of ms per pin scan on that walk alone +// (found while gating sinking-P3: address-layout luck made self-compile +// wall time bistable, 6s vs 60s, and any allocation-pattern change +// could flip it). Grow-only, like the conservative bounds — a freed +// LOS block just leaves the filter wider than necessary. +static char *los_lo = (char*)UINTPTR_MAX; +static char *los_hi = NULL; + +static void +los_bounds_add(void* start, size_t size) +{ + if ((char*)start < los_lo) los_lo = (char*)start; + if ((char*)start + size > los_hi) los_hi = (char*)start + size; +} + typedef char BitmapCell; #define CELL_COLOR_MASK 0x03 @@ -615,6 +634,10 @@ find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) // object referenced ONLY through an interior pointer (e.g. a flat // string's data) would be collected out from under it. Callers // canonicalize through cell_idx 0, so an interior hit marks the base. + // The los bounds reject most non-LOS candidates before the locked + // linear walk (see los_bounds_add). + if ((char*)ptr < los_lo || (char*)ptr >= los_hi) + return NULL; LOCK_GC(); for (LargeObjectInfo *lobj = los_list; lobj; lobj = lobj->next) { void* start = lobj->page_info.page_start; @@ -2908,6 +2931,7 @@ alloc_from_los(size_t size, EJSScanType scan_type) rv->alloc_size = size; conservative_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); + los_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); EJS_LIST_PREPEND (rv, los_list); //_ejs_log ("alloc_from_los returning %p\n, los_list = %p\n", rv->page_info.page_start, los_list); return rv->page_info.page_start; diff --git a/test/types-argsink1.js b/test/types-argsink1.js new file mode 100644 index 00000000..84c3d505 --- /dev/null +++ b/test/types-argsink1.js @@ -0,0 +1,30 @@ +// sinking-P3 probe: rest_args/args_obj length sinking +// (docs/sinking-plan.md). Every line must match node exactly, with and +// without --types and under EJS_NO_ARGS_SINK. + +function len0() { return arguments.length; } +function len2(a, b) { return arguments.length; } +function lenExpr(a) { return arguments.length - 1; } +console.log(len0(), len0(1), len2(), len2(1, 2, 3), lenExpr(1), lenExpr(1, 2, 3, 4)); + +function rl(a, ...r) { return r.length; } +console.log(rl(1), rl(1, 2), rl(1, 2, 3, 4)); + +// declining uses keep full semantics +function idx() { return arguments.length + ":" + arguments[0]; } +console.log(idx(), idx("x")); + +function fwd() { return Array.prototype.slice.call(arguments).join(","); } +console.log(fwd(1, 2, 3)); + +function restAll(...r) { return r.length + ":" + r.join("|"); } +console.log(restAll(), restAll(1, 2)); + +// arrow captures the enclosing arguments (env escape declines the sink) +function arrowCapture(a) { var g = () => arguments.length; return g(); } +console.log(arrowCapture(1, 2, 3)); + +// generator rest resolves in the outer function and rides the env +function* gen(...r) { yield r.length; yield r[0]; } +var it = gen(7, 8); +console.log(it.next().value, it.next().value); diff --git a/test/types-flowsink1.js b/test/types-flowsink1.js new file mode 100644 index 00000000..0202a6f0 --- /dev/null +++ b/test/types-flowsink1.js @@ -0,0 +1,71 @@ +// sinking-P3 probe: flow-sensitive field writes + partial-escape +// materialization (docs/sinking-plan.md). Every line must match node +// exactly, with and without --types, under EJS_SHAPES=off, gc-stress, +// and EJS_NO_FLOW_SINK. + +function branches(c, x, y) { var o = { a: 0 }; if (c) o.a = x; else o.a = y; return o.a; } +console.log(branches(true, 1, 2)); +console.log(branches(false, 1, 2)); + +function loopAcc(n) { + var o = { sum: 0, count: 0 }; + for (var i = 0; i < n; i++) { o.sum = o.sum + i; o.count = o.count + 1; } + return o.sum + ":" + o.count; +} +console.log(loopAcc(0)); +console.log(loopAcc(10)); + +function readBeforeWrite(x) { var o = { a: 5 }; var r = o.a; o.a = x; return r + "," + o.a; } +console.log(readBeforeWrite(9)); + +// partial escape: the object materializes at the call; identity and +// mutation through the alias must behave exactly +var captured = null; +function capture(o) { captured = o; return o; } +function escapes(x) { + var o = { a: 1, b: 2 }; + o.a = x; + var r = capture(o); + return (r === captured) + ":" + captured.a + ":" + captured.b; +} +console.log(escapes(42)); +captured.a = 77; +console.log(captured.a); + +// escape via return: two calls yield distinct objects +function mk(a, b) { var o = { x: 0, y: 0 }; o.x = a; o.y = b; return o; } +var m1 = mk(1, 2), m2 = mk(1, 2); +console.log(m1.x, m1.y, m1 === m2); + +// a fresh object per iteration escapes each time +function loopEscape(n) { + var out = []; + for (var i = 0; i < n; i++) { var o = { v: 0 }; o.v = i; out.push(o); } + var s = ""; + for (var j = 0; j < out.length; j++) s += (j ? "," : "") + out[j].v; + return s + ":" + (out[0] === out[1]); +} +console.log(loopEscape(4)); + +// declined shapes keep exact semantics: key-adding write +function addsKey(x) { var o = { a: 1 }; o.b = x; return o.a + ":" + o.b; } +console.log(addsKey(3)); + +// write inside try +function tryWrite(x) { var o = { a: 1 }; try { o.a = x; } catch (e) { o.a = -1; } return o.a; } +console.log(tryWrite(8)); + +// self-reference declines +function selfRef() { var o = { a: null }; o.a = o; return o.a === o; } +console.log(selfRef()); + +// a setter installed on Object.prototype must intercept the (declined) +// key-adding write — the epoch-free soundness pin +Object.defineProperty(Object.prototype, "zz", { + set: function (v) { this._zz = v * 2; }, + get: function () { return this._zz; }, + configurable: true, +}); +function addsZZ(x) { var o = { a: 1 }; o.zz = x; return o.zz; } +console.log(addsZZ(21)); +delete Object.prototype.zz; diff --git a/test/types/types-bench4.js b/test/types/types-bench4.js new file mode 100644 index 00000000..8346b18d --- /dev/null +++ b/test/types/types-bench4.js @@ -0,0 +1,41 @@ +// the sinking-P3 flow-sink microbenchmark: a loop-accumulator OBJECT +// whose fields are read and written every iteration. With +// flow-sensitive sinking the object scalar-replaces into loop-carried +// values (allocation-free, memory-op-free); without it every iteration +// pays the read/write diamonds against a real heap object. A/B: +// EJS_NO_FLOW_SINK=1 at compile time. +function accum(n) { + var o = { sum: 0, weighted: 0, count: 0 }; + var i = 0; + while (i < n) { + o.sum = o.sum + i; + o.weighted = o.weighted + i * 0.5; + o.count = o.count + 1; + i = i + 1; + } + return o.sum + o.weighted + o.count; +} +// the partial-escape twin: the accumulator escapes at the end of every +// call — materialization keeps the loop allocation-free and pays one +// allocation per call +var last = null; +function keep(o) { last = o; } +function accumEscape(n) { + var o = { sum: 0, count: 0 }; + var i = 0; + while (i < n) { + o.sum = o.sum + i; + o.count = o.count + 1; + i = i + 1; + } + keep(o); + return 1; +} +var out = 0; +var r = 0; +while (r < 20) { + out = out + accum(1000000); + out = out + accumEscape(1000000); + r = r + 1; +} +console.log(out, last.sum, last.count); From 331382f3954b5a6f33c14893c54fc4d1af12c2d8 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Sun, 26 Jul 2026 13:00:46 -0700 Subject: [PATCH 120/146] =?UTF-8?q?eir:=20gc-P4=20(P6.1)=20=E2=80=94=20mos?= =?UTF-8?q?tly-copying=20major=20compaction;=20pin-scan=20cliff=20killed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The pin-scan cliff (first order of business): all arenas now carve out of ONE PROT_NONE reservation committed 32MB at a time, so the conservative span is fixed and disjoint from the C/LLVM heap forever and arena lookup is a shift into a direct map instead of a per-word bsearch; LOS candidates resolve by binary search over a sorted range array instead of a locked linear walk. A/B on the same tree: the baseline binary sat in the deep slow mode (~10 min per self-compile, ~95% of samples in mark_ejsvals_in_range->find_page_and_cell); the fixed binary does 56-64s across 5 runs — the mmap-layout lottery is gone. Minor pause max 10.9ms; GC ~10% of self-compile wall. Compaction: full-GC conservative hits and registered generators set PINNED; after the sweep, the sparsest pages' unpinned live cells evacuate into denser pages (source set chosen COMPLETELY before any evacuation — one-pass selection let an early destination later become a source via its stale live count), every reference rewrites through the P1 forwarding records (roots incl. shape names, modules, gc-frame chains, remset, all live cells + primstr raw children), and emptied pages return to their arenas. Frag bench: 37.6MB -> 8.3MB (4.5x), idempotent; real self-compile full GCs free ~5k pages each; stress differentials (nursery-off, collect-every-997) byte-identical; EJS_GC_COMPACT=off for A/B. GC.heapSize() added for the gate. Growth target: full_gc_trigger() = EJS_GC_GROWTH% (default 50) of the post-sweep footprint, two-arena floor — replaces the duplicated 60MB constant; with compaction the cadence adapts in both directions. Knob census = 1. Drive-bys: release_to_los leaked the tail page of every freed large object; a young survivor page emptied by a FULL sweep corrupted both page lists (detached from the wrong list head — young_page_freed). Matrix x7 green; docs/gc-p4-results.md has the numbers. Co-Authored-By: Claude Fable 5 --- docs/gc-p4-results.md | 154 +++++++++ docs/gc-plan.md | 21 +- docs/plans.md | 4 +- runtime/ejs-atoms.h | 1 + runtime/ejs-gc.c | 727 +++++++++++++++++++++++++++++++----------- 5 files changed, 722 insertions(+), 185 deletions(-) create mode 100644 docs/gc-p4-results.md diff --git a/docs/gc-p4-results.md b/docs/gc-p4-results.md new file mode 100644 index 00000000..0e58ad8b --- /dev/null +++ b/docs/gc-p4-results.md @@ -0,0 +1,154 @@ +# gc-P4 results — mostly-copying major compaction + the pin-scan cliff fix + +Phase P6.1 (plans.md) / gc-P4 (gc-plan.md). Three deliverables, one +commit: the conservative pin-scan cliff fix (the plan's "first order of +business"), the mostly-copying major compaction, and the auto-tuned +growth target. + +## 1. The pin-scan cliff fix (arena reservation + O(1) lookup) + +The mechanism (evidence recorded in gc-plan.md §gc-P4 while gating +sinking-P3): each arena was its own mmap, so once a late arena landed +beyond the C/LLVM heap the conservative prefilter span +`[conservative_lo, conservative_hi)` swallowed the malloc heap, and +every stack word pointing into LLVM's own allocations passed the +prefilter into a per-word arena bsearch (and formerly a locked linear +LOS walk). Self-compile wall time was bistable per run (6s-vs-60s, +mmap-layout luck) and quasi-deterministic per binary. + +The fix, in `runtime/ejs-gc.c`: + +- **One arena reservation at init**: `MAX_HEAP_SIZE` (2GB) of address + space, `ARENA_SIZE`-aligned, mapped `PROT_NONE` and committed one + 32MB arena at a time (`arena_space_reserve` / `arena_new` via + `mprotect`). The arena span is fixed and disjoint from the C heap + for the life of the process — nothing foreign can ever be mapped + inside it — and the linux boxability hint (sub-2^47) is applied once + at reservation time. +- **O(1) arena lookup**: `(ptr - arena_space) >> ARENA_SHIFT` into a + direct map (`arena_lookup`) replaces the per-word bsearch. + `heap_arenas[]` stays for iteration and is address-sorted by + construction (sequential carving). +- **LOS sorted-range array**: `los_ranges` (binary search, grow/remove + on alloc/free) replaces the locked linear walk of `los_list` for + conservative candidates; the `[los_lo, los_hi)` stopgap bounds from + sinking-P3 remain as the quick reject. +- Drive-by: `release_to_los` now unmaps the whole mapping (header + + bitmap slop), not just `alloc_size` — the old code leaked the tail + page of every freed large object. + +## 2. Mostly-copying major compaction + +After a full collection's sweep, `compact_old_gen` evacuates the live +UNPINNED cells of the sparsest pages of each size class into the free +space of denser pages, rewrites every reference through the gc-P1 +forwarding records, and returns the emptied pages to their arenas. + +- **Pinning**: the conservative mark helpers now set the PINNED header + bit (bit 58) on every hit during a full collection — under + `EJS_GC_PROFILE` this rides the existing `profile_note_pin` dedup. + Every registered generator also pins (the registry is an intrusive + list of raw pointers, and the generator's own address is baked into + its `makecontext` args). Pinned cells sweep in place; pins clear in + the fixup walk. +- **Selection**: per size class, pages sorted live-count-ascending; the + COMPLETE source set is chosen before any evacuation (a source must + fit in the pool that excludes it and all prior sources). The + one-pass version had a real bug the frag benchmark caught: an early + DESTINATION could later be selected as a source via its stale live + count, evacuating more cells than the accounting reserved + ("compaction ran out of destination space" abort). +- **Fixup surface**: root-set slots (includes every shape's rooted + `name`), module Scan, gc-frame chains (no-ops today — frame-held + referents are conservatively pinned — walked for future-proofing), + remset entries (raw owner pointers), every live heap cell via + `old_gen_walk` + young survivor pages (Scan slots, primstr raw + children, self-interior pointers via `minor_fixup_evacuated` at copy + time). Sources skip via the FORWARDED header bit; freed afterwards + with no finalizers (the objects live on). +- **Safety facts established** (why moving OLD objects is sound): + property maps content-hash names; symbol hashcodes are cached + in-object; WeakMap/WeakSet ride hidden properties on the key; Map/Set + are linear SameValue lists; shapes transition tables key on shape + indices + content hashes; the only raw-pointer webs into the heap are + the generator registry (pinned) and rope/dependent string children + (fixed up). +- `EJS_GC_COMPACT=off` restores plain mark-sweep for A/B; the young + survivor-page-emptied-by-full-sweep path got a latent list-corruption + fix on the way (`young_page_freed`: the page lives on + `heap_priv.young_pages`, but `_ejs_finalize_obj` detached it from the + `heap_pages` bucket list, silently unlinking neighbors and leaving a + stale young-list head). + +### Shrink gate (frag benchmark, `GC.heapSize()` added for the gate) + +400k 3-slot objects, keep every 16th, clobber the stack, collect twice: + +| | heap after collect | +|---|---| +| compact **on** | **8.28 MB** (moved 38,177 objs, freed 7,159 pages) | +| compact off | 37.61 MB | + +4.5× shrink, identical checksums, second collect moves 0 (idempotent). +Nursery-off variant: 2.44 MB vs 38.44 MB. + +Test-writing lesson (cost an hour): garbage "dropped" at module +toplevel is conservatively retained by stale stack slots of the +toplevel frame — 7 pins held 800k objects transitively. Allocate in a +callee and clobber the stack before measuring. + +### Stress gates + +- `//:test-eir` + `//:test-stage1` green with compaction default-on. +- gc-genstress1 / generator23-25 / frag under `EJS_GC_NURSERY=off + EJS_GC_EVERY_N_ALLOC=997` (a compacting full GC every 997 allocs): + byte-identical output compact-on vs compact-off. +- Full self-compile under `EJS_GC_NURSERY=off` (compaction exercised on + every trigger for the entire compile): completes, produced compiler + runs. + +## 3. Auto-tuned growth target (knob census = 1) + +`full_gc_trigger()` replaces the duplicated `60MB` constant at both +trigger sites: a full collection fires when old-gen growth since the +last one exceeds `EJS_GC_GROWTH` percent (default 50) of the post-sweep +footprint, floored at two arenas (64MB — the old constant's cadence for +small heaps). With compaction shrinking the footprint, the trigger now +adapts in BOTH directions. `EJS_GC_GROWTH` is the census's one knob. + +## Timing (self-compile A/B, arm64, same tree, same probe) + +- **Baseline (HEAD runtime, per-arena mmaps)**: this binary sat in the + cliff's DEEP slow mode — it never completed one self-compile inside a + 10-minute timeout (attempt 1), and attempt 2's first run took ≈10 + minutes (inferred from process start times; the kill ate the buffered + probe output). `sample` during the run: ~95% of stacks inside + `_ejs_gc_minor_collect → mark_ejsvals_in_range → find_page_and_cell`. + This is the sinking-P3-era evidence reproduced at full strength — the + slow mode is a property of the BINARY's allocation layout, and this + binary drew the short straw. +- **Fixed (arena reservation + direct map + LOS bsearch)**: 62.6s / + 63.4s / 64.6s / 64.7s across 4 runs — the bistability is gone. A + profiled run: 56s wall, 106M allocs/4.65GB, GC total ≈ 5.5s (~10% of + wall: 4.45s across 5,723 minors, max minor pause 10.9ms — down from + the 500-860ms cliff pauses; 1.06s across 3 fulls). Compaction on the + real workload: the three full GCs freed 759 / 5,375 / 5,666 pages + (~2.9 / 21 / 22 MB returned per collection). + +So the fix is worth ~10× on unlucky binaries and removes the layout +lottery entirely; the residual GC share of a healthy self-compile is +~10%, of which pin scans are no longer the dominant term. + +## Follow-ups / deferred + +- Full-GC remset rooting retains dead dirty owners (`mark_object_root` + on every remset entry) and the post-sweep rebuild keeps them — a + self-sustaining garbage-retention cycle observed at 65536-entry + overflow in the frag test's first draft. Scanning dirty owners' + young edges without marking the owner live (or filtering dead owners + first) would fix it; not this phase's scope. +- Arena decommit: emptied arenas stay committed (page-level reuse only); + `mprotect(PROT_NONE)`/`madvise` on fully-free arenas is a cheap + follow-up now that the reservation exists. +- LOS is never compacted (by design) and `calc_heap_size` still counts + only page bytes, not LOS. diff --git a/docs/gc-plan.md b/docs/gc-plan.md index 64c7bb5d..04251ca0 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -684,8 +684,27 @@ bounds as needed. wall cost ~+1% (env slot inlining pays back half the frame cost). Deferred: invoke-form safepoints stay pinned; stackmap variant unmeasured. -- [ ] **gc-P4** mostly-copying major compaction + auto-tuned growth target. +- [x] **gc-P4** mostly-copying major compaction + auto-tuned growth target. *Gate:* heap shrink demonstrated; knob census = 1. + DONE 2026-07-26 — docs/gc-p4-results.md has the numbers. The + pin-scan cliff died first (the "first order of business"): one + PROT_NONE arena reservation at init + direct-map arena lookup + + LOS sorted-range bsearch; the A/B was brutal (baseline binary + stuck in the slow mode: >13 MINUTES for the self-compile the + fixed binary does in ~60s, sampled ~95% inside + mark_ejsvals_in_range→find_page_and_cell; fixed binary: 4 runs + within 62-64s, minor pause max 10.9ms, GC ≈ 10% of wall). + Compaction: conservative hits + registered generators set PINNED; + post-sweep sparse-first evacuation with the source set chosen + COMPLETELY before any evacuation (one-pass selection let an early + destination later become a source via its stale live count); + fixup = roots/modules/gc-frames/remset + all live cells. Shrink + gate: frag bench 37.6→8.3MB (4.5×), idempotent second collect; + self-compile full GCs free ~5k pages each. Growth target: + full_gc_trigger() = EJS_GC_GROWTH% (default 50) of post-sweep + footprint, 2-arena floor; knob census = 1. EJS_GC_COMPACT=off + for A/B. Drive-bys: LOS tail-page leak on free; + young-survivor-page full-sweep list corruption (young_page_freed). - [ ] **gc-P5** shapes intersection (sequenced by maam P4): trace bitmaps, inline slots, object-literal inline allocation, typed-slot elisions. - [ ] **gc-P6** collector thread: concurrent mark (SATB) + STW survivor diff --git a/docs/plans.md b/docs/plans.md index 0489e5e8..0a1af0e4 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -91,8 +91,8 @@ Delete the allocations the mover made cheap. Detail: sinking-plan.md. The heap shrinks; the collector consumes the object model. Detail: gc-plan.md, shapes-plan.md (Step B). -- [ ] **P6.1** mostly-copying major compaction + auto-tuned growth - target (gc-P4). +- [x] **P6.1** mostly-copying major compaction + auto-tuned growth + target (gc-P4). DONE 2026-07-26 — docs/gc-p4-results.md. - [ ] **P6.2** shapes intersection: per-shape trace bitmaps, inline slots, object-literal inline allocation, typed-slot barrier elision (gc-P5; consumes shapes-plan's deferred Step B). diff --git a/runtime/ejs-atoms.h b/runtime/ejs-atoms.h index 612c67e9..4c43d66e 100644 --- a/runtime/ejs-atoms.h +++ b/runtime/ejs-atoms.h @@ -353,6 +353,7 @@ EJS_ATOM(timeEnd) // gc functions EJS_ATOM(collect) +EJS_ATOM(heapSize) EJS_ATOM(dumpAllocationStats) EJS_ATOM(dumpLiveStrings) diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 8e8f9813..0245d5dd 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -95,6 +95,15 @@ void _ejs_gc_dump_heap_stats(); EJSBool gc_disabled; int collect_every_alloc = 0; +// two header bits from the gc-reserved range (57-63; see ejs-types.h). +// YOUNG: set at allocation, cleared on first survival (profiling) or +// promotion (the nursery). PINNED: set on every conservative hit during +// a full collection — the compacting major must sweep that cell in +// place; cleared by compaction's fixup walk (or the profile census when +// compaction is off). +#define EJS_GC_HEADER_YOUNG (1ULL << 57) +#define EJS_GC_HEADER_PINNED (1ULL << 58) + #if CONCURRENT #error "not implemented" #else @@ -193,17 +202,21 @@ typedef struct _RootSetEntry { static RootSetEntry *root_set; +#ifndef MAP_NORESERVE +#define MAP_NORESERVE 0 +#endif + // GC-heap pointers get NaN-boxed into a 47-bit ejsval payload, so every // page must map below 2^47. macOS hands out low addresses naturally; // linux (48-bit VA, top-down mmap) does not — ask for a hinted region // and bump the hint as regions fill. static void* -mmap_boxable(size_t size) +mmap_boxable(size_t size, int prot, int extra_flags) { #ifdef TARGET_LINUX static uintptr_t hint = 0x280000000000UL; // well below 2^47 for (int tries = 0; tries < 64; tries++) { - void* res = mmap((void*)hint, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, MAP_FD, 0); + void* res = mmap((void*)hint, size, prot, MAP_ANON | MAP_PRIVATE | extra_flags, MAP_FD, 0); if (res == MAP_FAILED) return NULL; if (((uintptr_t)res + size) < (1UL << 47)) { hint = (uintptr_t)res + size; @@ -215,45 +228,17 @@ mmap_boxable(size_t size) } return NULL; #else - void* res = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, MAP_FD, 0); + void* res = mmap(NULL, size, prot, MAP_ANON | MAP_PRIVATE | extra_flags, MAP_FD, 0); return res == MAP_FAILED ? NULL : res; #endif } static void* -alloc_from_os(size_t size, size_t align) +alloc_from_os(size_t size) { - if (align == 0) { - size = MAX(size, PAGE_SIZE); - void* res = mmap_boxable(size); - SPEW(2, _ejs_log ("mmap for 0 alignment = %p\n", res)); - return res; - } - - void* res = mmap_boxable(size*2); - if (res == NULL) { - return NULL; - } - - SPEW(2, _ejs_log ("mmap returned %p\n", res)); - - if (((uintptr_t)res % align) == 0) { - // the memory was aligned, unmap the second half of our mapping - // XXX should we just rejoice and add both halves? - SPEW(2, _ejs_log ("already aligned\n")); - munmap (res + size, size); - } - else { - SPEW(2, _ejs_log ("not aligned\n")); - // align res, and unmap the areas before/after the new mapping - void *aligned_res = (void*)EJS_ALIGN(res, align); - // the area before - munmap (res, (uintptr_t)aligned_res - (uintptr_t)res); - // the area after - munmap (aligned_res+size, (uintptr_t)res+size*2 - (uintptr_t)(aligned_res+size)); - res = aligned_res; - SPEW(2, _ejs_log ("aligned ptr = %p\n", res)); - } + size = MAX(size, PAGE_SIZE); + void* res = mmap_boxable(size, PROT_READ | PROT_WRITE, 0); + SPEW(2, _ejs_log ("mmap = %p\n", res)); return res; } @@ -283,12 +268,66 @@ typedef struct _Arena { static Arena *heap_arenas[MAX_ARENAS]; static int num_arenas; +// ---- the arena address-space reservation (gc-P4) ---------------- +// +// All arenas are carved out of ONE contiguous reservation, mapped +// PROT_NONE at init and committed ARENA_SIZE at a time. Two payoffs, +// both for the conservative scanner: +// +// - the arena span is FIXED and disjoint from the C/LLVM heap for the +// life of the process. Before this, each arena was its own mmap: +// once a late arena landed beyond the C heap, the conservative +// prefilter span swallowed every malloc'd address, and during +// codegen MILLIONS of stack words pointing into LLVM's own +// allocations passed the prefilter into a per-word bsearch — the +// bistable 6s-vs-60s self-compile (mmap layout luck decided). +// - arena lookup is two compares + a shift into a direct map instead +// of a bsearch per candidate word. +// +// Reserved address space costs nothing until committed; nothing foreign +// can ever be mapped inside the reservation. +#define ARENA_SHIFT 25 +_Static_assert((1L << ARENA_SHIFT) == ARENA_SIZE, "ARENA_SHIFT matches ARENA_SIZE"); + +static char* arena_space; // base, ARENA_SIZE-aligned +static char* arena_space_pos; // next uncommitted chunk +static char* arena_space_end; // base + MAX_HEAP_SIZE +static Arena* arena_map[MAX_ARENAS]; // direct map: (ptr - base) >> ARENA_SHIFT + +static void +arena_space_reserve(void) +{ + size_t size = (size_t)MAX_HEAP_SIZE; + char* res = mmap_boxable(size + ARENA_SIZE, PROT_NONE, MAP_NORESERVE); + if (res == NULL) { + _ejs_log ("gc: unable to reserve the arena address space\n"); + abort(); + } + char* aligned = (char*)EJS_ALIGN(res, ARENA_SIZE); + // trim the alignment slop so the reservation is exactly the span + if (aligned > res) + munmap (res, aligned - res); + if (aligned + size < res + size + ARENA_SIZE) + munmap (aligned + size, (res + size + ARENA_SIZE) - (aligned + size)); + arena_space = aligned; + arena_space_pos = aligned; + arena_space_end = aligned + size; +} + +static inline Arena* +arena_lookup(GCObjectPtr ptr) +{ + uintptr_t off = (uintptr_t)((char*)ptr - arena_space); + if (off >= (uintptr_t)MAX_HEAP_SIZE) return NULL; + return arena_map[off >> ARENA_SHIFT]; +} + // conservative-scan prefilter: [conservative_lo, conservative_hi) bounds -// every GC-managed address (arenas + LOS blocks). The stack scanners -// reject candidate words with two compares instead of a bsearch + linear -// LOS walk per word (which made minor pauses grow with heap size). -// Bounds only ever widen — stale coverage of freed blocks is merely -// conservative. +// every GC-managed address (the arena reservation + LOS blocks). The +// stack scanners reject candidate words with two compares before any +// lookup. Bounds only ever widen — stale coverage of freed LOS blocks +// is merely conservative, and a candidate inside the reservation that +// hits no committed arena rejects in the direct map. static char *conservative_lo = (char*)UINTPTR_MAX; static char *conservative_hi = NULL; static inline void @@ -298,25 +337,18 @@ conservative_bounds_add(void* start, size_t size) if ((char*)start + size > conservative_hi) conservative_hi = (char*)start + size; } -// LOS-only bounds, the second-stage prefilter: a conservative candidate -// inside [conservative_lo, conservative_hi) that resolves to no arena -// used to take a LOCKED LINEAR WALK of the whole LOS list — per stack -// word. With arenas and LOS blocks scattered by mmap, a deep-recursion -// minor GC could spend hundreds of ms per pin scan on that walk alone -// (found while gating sinking-P3: address-layout luck made self-compile -// wall time bistable, 6s vs 60s, and any allocation-pattern change -// could flip it). Grow-only, like the conservative bounds — a freed -// LOS block just leaves the filter wider than necessary. +// ---- LOS lookup: sorted range array ----------------------------- +// +// A conservative candidate that misses the arena reservation resolves +// against the LOS by binary search over a sorted array of payload +// ranges. This replaces a LOCKED LINEAR WALK of the whole LOS list — +// per stack word — which, with blocks scattered by mmap, could put +// hundreds of ms per pin scan on deep-recursion minors (found while +// gating sinking-P3; the [los_lo, los_hi) bounds prefilter landed then +// as a stopgap and remains as the quick reject). static char *los_lo = (char*)UINTPTR_MAX; static char *los_hi = NULL; -static void -los_bounds_add(void* start, size_t size) -{ - if ((char*)start < los_lo) los_lo = (char*)start; - if ((char*)start + size > los_hi) los_hi = (char*)start + size; -} - typedef char BitmapCell; #define CELL_COLOR_MASK 0x03 @@ -406,6 +438,88 @@ struct _LargeObjectInfo { static EJSList heap_pages[HEAP_PAGELISTS_COUNT]; static LargeObjectInfo *los_list; +// ---- LOS lookup: sorted range array ----------------------------- +// +// A conservative candidate that misses the arena reservation resolves +// against the LOS by binary search over a sorted array of payload +// ranges. This replaces a LOCKED LINEAR WALK of the whole LOS list — +// per stack word — which, with blocks scattered by mmap, could put +// hundreds of ms per pin scan on deep-recursion minors (found while +// gating sinking-P3; the [los_lo, los_hi) bounds prefilter landed then +// as a stopgap and remains as the quick reject). +typedef struct { + char* start; // payload: page_info.page_start + char* end; // start + cell_size + LargeObjectInfo* lobj; +} LOSRange; +static LOSRange* los_ranges; +static int los_range_count; +static int los_range_capacity; + +// index of the first range with start > ptr, in [0, count] +static int +los_range_upper_bound(char* ptr) +{ + int lo = 0, hi = los_range_count; + while (lo < hi) { + int mid = (lo + hi) / 2; + if (los_ranges[mid].start <= ptr) lo = mid + 1; + else hi = mid; + } + return lo; +} + +static void +los_ranges_add(LargeObjectInfo* lobj) +{ + char* start = (char*)lobj->page_info.page_start; + if (start < los_lo) los_lo = start; + if (start + lobj->page_info.cell_size > los_hi) + los_hi = start + lobj->page_info.cell_size; + + if (los_range_count == los_range_capacity) { + los_range_capacity = los_range_capacity ? los_range_capacity * 2 : 256; + los_ranges = realloc (los_ranges, los_range_capacity * sizeof(LOSRange)); + } + int at = los_range_upper_bound(start); + memmove (&los_ranges[at + 1], &los_ranges[at], + (los_range_count - at) * sizeof(LOSRange)); + los_ranges[at].start = start; + los_ranges[at].end = start + lobj->page_info.cell_size; + los_ranges[at].lobj = lobj; + los_range_count++; +} + +static void +los_ranges_remove(LargeObjectInfo* lobj) +{ + char* start = (char*)lobj->page_info.page_start; + int at = los_range_upper_bound(start) - 1; + EJS_ASSERT(at >= 0 && los_ranges[at].lobj == lobj); + memmove (&los_ranges[at], &los_ranges[at + 1], + (los_range_count - at - 1) * sizeof(LOSRange)); + los_range_count--; +} + +// interior pointers match: a conservative reference may be a derived +// pointer whose base value the optimizer discarded — with an exact-base +// match a large object referenced ONLY through an interior pointer +// (e.g. a flat string's data) would be collected out from under it. +// Callers canonicalize through cell_idx 0, so an interior hit marks the +// base. +static PageInfo* +los_lookup(GCObjectPtr ptr, uint32_t *cell_idx) +{ + if ((char*)ptr < los_lo || (char*)ptr >= los_hi) + return NULL; + int at = los_range_upper_bound((char*)ptr) - 1; + if (at < 0 || (char*)ptr >= los_ranges[at].end) + return NULL; + if (cell_idx) + *cell_idx = 0; + return &los_ranges[at].lobj->page_info; +} + // GC profiling instrumentation state (definitions live with the profile // block further down, before the mark helpers use them) static EJSBool gc_profile; @@ -427,6 +541,7 @@ static GCObjectPtr alloc_from_page(PageInfo* info); static void finalize_object(GCObjectPtr p); static void nursery_init(void); static void young_normalize_for_full_gc(void); +static void young_page_freed(PageInfo* info, Arena* arena); static void _ejs_gc_minor_collect(const char* reason); static GCObjectPtr young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type); // allocator accounting, defined with the allocator further down @@ -434,6 +549,23 @@ extern size_t alloc_size; extern size_t alloc_size_at_last_gc; static size_t heap_size_at_last_gc; +// gc-P4: the compacting major (EJS_GC_COMPACT=off for A/B) and THE +// full-collection growth knob — a full GC triggers when old-gen growth +// since the last one exceeds gc_growth_pct percent of the post-sweep +// footprint (floor: two arenas, so small programs keep a sane cadence). +// The knob replaces the old fixed 60MB constant; with compaction +// shrinking the heap, the trigger now adapts in BOTH directions. +static EJSBool compact_enabled; +static int gc_growth_pct = 50; + +static size_t +full_gc_trigger(void) +{ + size_t t = heap_size_at_last_gc * (size_t)gc_growth_pct / 100; + size_t floor_ = 2 * (size_t)ARENA_SIZE; + return t > floor_ ? t : floor_; +} + // allocated-ness of a cell: old pages answer from the bitmap; ACTIVE // young pages (young==1) answer from the bump rule — everything below // the bump cursor is an object, the bitmap holds only collection @@ -465,47 +597,32 @@ verify_arena(Arena *arena) static Arena* arena_new() { - if (num_arenas == MAX_ARENAS-1) - return NULL; + if (arena_space_pos == arena_space_end) + return NULL; // the reservation IS the heap cap SPEW(1, _ejs_log ("num_arenas = %d, max = %d\n", num_arenas, MAX_ARENAS)); - void* arena_start = alloc_from_os(ARENA_SIZE, ARENA_SIZE); - if (arena_start == NULL) + void* arena_start = arena_space_pos; + if (mprotect (arena_start, ARENA_SIZE, PROT_READ | PROT_WRITE) != 0) return NULL; Arena* new_arena = arena_start; memset (new_arena, 0, sizeof(Arena)); - conservative_bounds_add (arena_start, ARENA_SIZE); new_arena->end = arena_start + ARENA_SIZE; new_arena->pos = (void*)EJS_ALIGN(arena_start + sizeof(Arena), PAGE_SIZE); LOCK_ARENAS(); - int insert_point = -1; - for (int i = 0; i < num_arenas; i ++) { - if (new_arena < heap_arenas[i]) { - insert_point = i; - break; - } - } - if (insert_point == -1) insert_point = num_arenas; - if (num_arenas-insert_point > 0) - memmove (&heap_arenas[insert_point + 1], &heap_arenas[insert_point], (num_arenas-insert_point)*sizeof(Arena*)); - heap_arenas[insert_point] = new_arena; - num_arenas++; + arena_space_pos += ARENA_SIZE; + // sequential carving: heap_arenas stays address-sorted by construction + heap_arenas[num_arenas++] = new_arena; + arena_map[((char*)arena_start - arena_space) >> ARENA_SHIFT] = new_arena; UNLOCK_ARENAS(); return new_arena; } -static void -arena_destroy (Arena* arena) -{ - release_to_os (arena, (intptr_t)arena->end - (intptr_t)arena); -} - static PageInfo* alloc_page_info_from_arena(Arena *arena, void *page_data, size_t cell_size) { @@ -554,54 +671,15 @@ alloc_page_from_arena(Arena *arena, size_t cell_size) } } -static int -compare_ptrs(const void* v1, const void* v2) -{ - Arena **a1 = (Arena**)v1; - Arena **a2 = (Arena**)v2; - ptrdiff_t diff = (intptr_t)*a1 - (intptr_t)*a2; - if (diff < 0) return -1; - if (diff == 0) return 0; - return 1; -} - -static Arena* -find_arena(GCObjectPtr ptr) -{ - Arena* arena_ptr = PTR_TO_ARENA(ptr); - - LOCK_ARENAS(); - // inlined bsearch - void* rv = NULL; - Arena**base = heap_arenas; - for (int lim = num_arenas; lim != 0; lim >>= 1) { - Arena** p = base + (lim >> 1); - ptrdiff_t diff = (intptr_t)arena_ptr - (intptr_t)*p; - if (diff == 0) { - rv = *p; - break; - } - if (diff > 0) { /* key > p: move right */ - base = p + 1; - lim--; - } /* else move left */ - } - UNLOCK_ARENAS(); - if (!rv) return NULL; - return *(Arena**)rv; -} - -static Arena* -find_arena_in_array(GCObjectPtr ptr, Arena** array, int length) -{ - void* arena_ptr = PTR_TO_ARENA(ptr); - Arena **bsearch_rv = (Arena**)bsearch (&arena_ptr, array, length, sizeof(Arena*), compare_ptrs); - return bsearch_rv ? *bsearch_rv : NULL; -} - static PageInfo* -find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) +find_page_and_cell(GCObjectPtr ptr, uint32_t *cell_idx) { + // bounds prefilter: static data (atoms, module structs) and foreign + // pointers reject in two compares + if ((char*)ptr < conservative_lo || (char*)ptr >= conservative_hi) + return NULL; + + Arena* arena = arena_lookup(ptr); if (EJS_LIKELY (arena != NULL)) { SANITY(verify_arena(arena)); @@ -628,41 +706,7 @@ find_page_and_cell_from_arena(GCObjectPtr ptr, uint32_t *cell_idx, Arena *arena) return page; } - // check if it's in the LOS. Interior pointers match too (a - // P0): a conservative reference may be a derived pointer whose base - // value the optimizer discarded — with an exact-base match a large - // object referenced ONLY through an interior pointer (e.g. a flat - // string's data) would be collected out from under it. Callers - // canonicalize through cell_idx 0, so an interior hit marks the base. - // The los bounds reject most non-LOS candidates before the locked - // linear walk (see los_bounds_add). - if ((char*)ptr < los_lo || (char*)ptr >= los_hi) - return NULL; - LOCK_GC(); - for (LargeObjectInfo *lobj = los_list; lobj; lobj = lobj->next) { - void* start = lobj->page_info.page_start; - if (ptr >= start && ptr < start + lobj->page_info.cell_size) { - UNLOCK_GC(); - if (cell_idx) - *cell_idx = 0; - return &lobj->page_info; - } - } - UNLOCK_GC(); - return NULL; -} - -static PageInfo* -find_page_and_cell(GCObjectPtr ptr, uint32_t *cell_idx) -{ - // bounds prefilter: static data (atoms, module structs) and foreign - // pointers reject in two compares instead of an arena bsearch + a - // locked linear LOS walk — the latter made full-GC marking cost - // ~13us per object once the (uncollected) LOS list grew - if ((char*)ptr < conservative_lo || (char*)ptr >= conservative_hi) - return NULL; - Arena* arena = find_arena_in_array(ptr, heap_arenas, num_arenas); - return find_page_and_cell_from_arena(ptr, cell_idx, arena); + return los_lookup(ptr, cell_idx); } static void @@ -789,6 +833,14 @@ _ejs_finalize_obj(GCObjectPtr ptr, Arena* arena, PageInfo* info, uint32_t cell_i SPEW(2, _ejs_log ("releasing large object (size %zd)!\n", info->los_info->alloc_size)); release_to_los (info->los_info); } + else if (info->young) { + // a young survivor page emptied by a FULL sweep lives on + // heap_priv.young_pages, not a heap_pages bucket — + // detaching from the bucket list would silently unlink + // it from its young_pages neighbors while leaving that + // list's head/tail stale + young_page_freed (info, arena); + } else { EJS_ASSERT(arena); SPEW(2, _ejs_log ("page %p is empty, putting it on the free list\n", info)); @@ -820,6 +872,22 @@ _ejs_gc_init() if (gc_profile) atexit (profile_report_shutdown); + // the compacting major is the default; EJS_GC_COMPACT=off + // restores plain mark-sweep for A/B and differential runs + { + char* e = getenv("EJS_GC_COMPACT"); + compact_enabled = !(e && (strcmp(e, "off") == 0 || strcmp(e, "0") == 0)); + } + + // THE growth knob (gc-P4 knob census = 1): a full collection + // triggers when old-gen growth exceeds EJS_GC_GROWTH percent of the + // post-sweep footprint + { + char* growth = getenv("EJS_GC_GROWTH"); + if (growth) gc_growth_pct = atoi(growth); + if (gc_growth_pct <= 0) gc_growth_pct = 50; + } + // the forwarding helpers are inert until the mover, so // exercise them here on a scratch buffer when asked — a build whose // header layout breaks the forwarding contract fails loudly instead @@ -834,6 +902,12 @@ _ejs_gc_init() _ejs_log ("EJS_GC_SELFTEST: forwarding helpers ok\n"); } + // one reservation holds every arena the process will ever commit; + // the conservative prefilter covers it from day one (candidates in + // uncommitted space reject via the direct map) + arena_space_reserve(); + conservative_bounds_add (arena_space, (size_t)MAX_HEAP_SIZE); + // allocate an initial arenas for (int i = 0; i < 10; i ++) arena_new(); @@ -965,10 +1039,12 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) // cells in place; nothing else is this collection's business if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } - // a conservative hit pins under the mover — recorded even - // when the target is already marked (the white check below is a - // marking optimization, not a pin filter) + // a conservative hit PINS: the compacting major must sweep this + // cell in place. Recorded even when the target is already + // marked (the white check below is a marking optimization, not + // a pin filter). profile_note_pin sets the same bit plus stats. if (gc_profile) profile_note_pin(page, cell_idx, gcptr); + else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells @@ -1059,9 +1135,10 @@ mark_ejsvals_in_range(void* low, void* high) // minor collections only pin young cells here if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } - // a conservative hit pins under the mover — recorded - // even when the target is already marked + // a conservative hit PINS: the compacting major must sweep + // this cell in place (recorded even when already marked) if (gc_profile) profile_note_pin(page, cell_idx, gcptr); + else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells @@ -1103,8 +1180,8 @@ static int num_primsym_allocs = 0; // The YOUNG bit is set unconditionally (an OR folded into the header // store the allocator already does); everything else is gated on // gc_profile so the measured path stays clean when profiling is off. -#define EJS_GC_HEADER_YOUNG (1ULL << 57) -#define EJS_GC_HEADER_PINNED (1ULL << 58) +// (The YOUNG/PINNED #defines live near the top of the file — the mark +// helpers set PINNED for the compacting major.) enum { PROF_SRC_CSTACK = 0, // conservative C-stack ranges (incl. suspended segments) @@ -1195,7 +1272,12 @@ profile_visit_live_cell(GCObjectHeader* h, size_t bytes) prof_cycle_ysurv_bytes += bytes; *h &= ~EJS_GC_HEADER_YOUNG; // survived one collection: no longer young } - *h &= ~EJS_GC_HEADER_PINNED; // reset for the next cycle + // reset pins for the next cycle — but the census runs PRE-sweep and + // the compacting major reads pins POST-sweep (and clears them in its + // fixup walk); clearing here would un-pin every C-visible object + // right before evacuation decides what may move + if (!compact_enabled) + *h &= ~EJS_GC_HEADER_PINNED; } static void @@ -1417,6 +1499,19 @@ young_page_install(int idx, size_t cell_size) return info; } +// an emptied young page leaves heap_priv.young_pages for the nursery +// arena's free list (called from _ejs_finalize_obj when a full sweep +// kills a survivor page's last cell) +static void +young_page_freed(PageInfo* info, Arena* arena) +{ + EJS_ASSERT(arena && arena->is_nursery); + _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)info); + info->young = 0; + info->bump_ptr = info->page_start; + EJS_LIST_PREPEND (info, arena->free_pages); +} + // set when a scan leaves a still-young (pinned) referent behind — the // dirty owner carries to the next cycle static EJSBool minor_scan_saw_young; @@ -2191,10 +2286,7 @@ _ejs_gc_minor_collect(const char* reason) // promotions grow the old gen; when nearly every allocation is // young, this is the only place the full-collection trigger can fire if (!gc_disabled) { - size_t gc_trigger = 60 * 1024 * 1024; - if (heap_size_at_last_gc / 2 > gc_trigger) - gc_trigger = heap_size_at_last_gc / 2; - if (alloc_size - alloc_size_at_last_gc >= gc_trigger) { + if (alloc_size - alloc_size_at_last_gc >= full_gc_trigger()) { _ejs_gc_collect("promotion growth"); alloc_size_at_last_gc = alloc_size; } @@ -2610,6 +2702,262 @@ process_worklist() EJS_ASSERT(work_list.list == NULL); } +// ============== mostly-copying major compaction (gc-P4) =================== +// +// Mark-sweep never shrinks: live old-gen cells sit wherever history put +// them and sparse pages hold whole pages hostage for a cell or two. +// After the sweep, this pass evacuates the live UNPINNED cells of the +// sparsest pages of each size class into the free space of the denser +// ones, rewrites every reference through the P1 forwarding records, and +// returns the emptied pages to their arenas — the heap actually shrinks, +// and the proportional growth target then adapts downward. +// +// Pinned cells sweep in place, exactly like the minor's young pins: +// conservative hits (C stack, spilled registers, generator stacks) set +// PINNED during marking, and every registered generator object pins too +// (the registry is an intrusive list of raw pointers). LOS objects +// never move. EJS_GC_COMPACT=off restores plain mark-sweep for A/B and +// differential runs. +static uint64_t compact_moved_objs, compact_moved_bytes, compact_freed_pages; + +static void +compact_fixup_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL) return; + // boxed payloads are object bases, and statics outside the heap have + // headers too, so the forwarded-bit read is always safe + if (_ejs_gc_is_forwarded(p)) + rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(p)); +} + +static void +compact_fixup_primstr_child(EJSPrimString** childp) +{ + GCObjectPtr p = (GCObjectPtr)*childp; + if (p && _ejs_gc_is_forwarded(p)) + *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(p); +} + +static void +compact_fixup_object(GCObjectPtr p) +{ + GCObjectHeader* h = (GCObjectHeader*)p; + if (*h & EJS_GC_HEADER_FORWARDED) + return; // an evacuated source; its copy is walked on its own page + *h &= ~EJS_GC_HEADER_PINNED; // pins are per-cycle + if ((*h & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) + OP(obj,Scan)(obj, compact_fixup_slot); + } + else if ((*h & EJS_SCAN_TYPE_PRIMSTR) != 0) { + EJSPrimString* ps = (EJSPrimString*)p; + switch (EJS_PRIMSTR_GET_TYPE(ps)) { + case EJS_STRING_ROPE: + compact_fixup_primstr_child(&ps->data.rope.left); + compact_fixup_primstr_child(&ps->data.rope.right); + break; + case EJS_STRING_DEPENDENT: + compact_fixup_primstr_child(&ps->data.dependent.dep); + break; + case EJS_STRING_FLAT: + break; + } + } + else if ((*h & EJS_SCAN_TYPE_PRIMSYM) != 0) + compact_fixup_slot(&((EJSPrimSymbol*)p)->description); + else if ((*h & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + compact_fixup_slot(&env->slots[i]); + } +} + +static EJSBool +compact_page_has_pins(PageInfo* pg) +{ + GCObjectPtr p = pg->page_start; + for (int c = 0; c < pg->num_cells; c++, p += pg->cell_size) + if (!IS_FREE(pg->page_bitmap[c]) + && (*(GCObjectHeader*)p & EJS_GC_HEADER_PINNED)) + return EJS_TRUE; + return EJS_FALSE; +} + +// destination cell in `bucket`: first page (from the cursor on) with +// free capacity. Sources were detached from the bucket list before +// evacuation, so every listed page qualifies. The selection accounting +// guarantees capacity; running dry is a bug. +static GCObjectPtr +compact_alloc_dest(int bucket, PageInfo** cursor, PageInfo** dest_page) +{ + PageInfo* pg = *cursor ? *cursor : (PageInfo*)heap_pages[bucket].head; + while (pg && !pg->num_free_cells) + pg = pg->next; + if (!pg) { + _ejs_log ("GC BUG: compaction ran out of destination space (bucket %d)\n", bucket); + abort(); + } + *cursor = pg; + *dest_page = pg; + return alloc_from_page(pg); +} + +static void +compact_evacuate_page(int bucket, PageInfo* pg, PageInfo** cursor) +{ + GCObjectPtr from = pg->page_start; + for (int c = 0; c < pg->num_cells; c++, from += pg->cell_size) { + if (IS_FREE(pg->page_bitmap[c])) + continue; + PageInfo* dest_page; + GCObjectPtr to = compact_alloc_dest(bucket, cursor, &dest_page); + memcpy (to, from, pg->cell_size); + // the copy is live THIS cycle: keep it marked so the coming + // color flip turns it white with every other survivor + SET_BLACK(dest_page->page_bitmap[PTR_TO_CELL(to, dest_page)]); + minor_fixup_evacuated(from, to, pg->cell_size); + _ejs_gc_forward(from, to); + gc_watch_hit ("compact-evacuate-from", from); + compact_moved_objs++; + compact_moved_bytes += pg->cell_size; + } +} + +typedef struct { PageInfo* page; int live; } CompactPageStat; + +static int +compact_stat_cmp(const void* a, const void* b) +{ + return ((const CompactPageStat*)a)->live - ((const CompactPageStat*)b)->live; +} + +static void +compact_old_gen(void) +{ + // every registered generator pins: the registry reaches them through + // raw intrusive pointers (reg_next/reg_prev), and their machine + // state is re-scanned conservatively by their specops + for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) + *(GCObjectHeader*)g |= EJS_GC_HEADER_PINNED; + + uint64_t moved_before = compact_moved_objs; + uint64_t freed_before = compact_freed_pages; + + EJSList evac_pages; + memset (&evac_pages, 0, sizeof(evac_pages)); + + // 1. selection + evacuation, per size class: sparse-first, evacuate + // while the rest of the class has room + for (int bucket = 0; bucket < HEAP_PAGELISTS_COUNT; bucket++) { + int count = 0; + for (PageInfo* pg = (PageInfo*)heap_pages[bucket].head; pg; pg = pg->next) + count++; + if (count < 2) + continue; + + CompactPageStat* stats = (CompactPageStat*)malloc (count * sizeof(CompactPageStat)); + size_t total_free = 0; + int n = 0; + for (PageInfo* pg = (PageInfo*)heap_pages[bucket].head; pg; pg = pg->next) { + stats[n].page = pg; + stats[n].live = pg->num_cells - pg->num_free_cells; + n++; + total_free += pg->num_free_cells; + } + qsort (stats, n, sizeof(CompactPageStat), compact_stat_cmp); + + // choose the COMPLETE source set first, sparse-first: a page + // accepted as a source leaves the destination pool, and the + // remaining pool must hold every already-accepted live cell + // plus this page's. (Selecting and evacuating in one pass let + // an early DESTINATION later be picked as a source via its + // stale live count — evacuating more cells than the accounting + // reserved space for.) + size_t dest_free = total_free; + size_t src_live = 0; + EJSList src_pages; + memset (&src_pages, 0, sizeof(src_pages)); + for (int i = 0; i < n; i++) { + PageInfo* pg = stats[i].page; + size_t live = (size_t)stats[i].live; + if (live == 0) + continue; // the sweep freelists empties; belt only + if (dest_free - pg->num_free_cells < src_live + live) + break; // the sparsest candidate doesn't fit; denser ones won't either + if (compact_page_has_pins(pg)) + continue; // pinned cells sweep in place; the page stays a destination + _ejs_list_detach_node (&heap_pages[bucket], (EJSListNode*)pg); + _ejs_list_append_node (&src_pages, (EJSListNode*)pg); + dest_free -= pg->num_free_cells; + src_live += live; + } + + // sources are off the bucket list now: every listed page is a + // pure destination, so the cursor can walk it freely + PageInfo* cursor = NULL; + PageInfo* src; + while ((src = (PageInfo*)src_pages.head) != NULL) { + _ejs_list_detach_node (&src_pages, (EJSListNode*)src); + compact_evacuate_page (bucket, src, &cursor); + _ejs_list_append_node (&evac_pages, (EJSListNode*)src); + } + free (stats); + } + + // 2. fixup: rewrite every reference that can name a moved cell, and + // clear the cycle's pins while walking the live set. Runs even + // when nothing was evacuated — the pins must reset either way. + for (RootSetEntry* e = root_set; e; e = e->next) + if (e->root) + compact_fixup_slot(e->root); + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + if (mod->ops) + OP(mod,Scan)(mod, compact_fixup_slot); + } + // gc-frame slots' referents were all conservatively pinned (full GC + // never skips frame records), so these rewrites are no-ops today; + // walked anyway so precision changes can't silently break this pass + walk_gc_frames(compact_fixup_slot); + for (int i = 0; i < _ejs_heap.remset_count; i++) { + GCObjectPtr o = (GCObjectPtr)_ejs_heap.remset[i]; + if (_ejs_gc_is_forwarded(o)) + _ejs_heap.remset[i] = _ejs_gc_forwarding_addr(o); + } + old_gen_walk (compact_fixup_object); // old pages (sources skip via FORWARDED) + LOS + for (PageInfo* pg = (PageInfo*)heap_priv.young_pages.head; pg; pg = pg->next) { + GCObjectPtr p = pg->page_start; + for (int c = 0; c < CELLS_IN_PAGE(pg); c++, p += pg->cell_size) + if (!IS_FREE(pg->page_bitmap[c])) + compact_fixup_object(p); + } + + // 3. release the sources: nothing reads the forwarding records + // anymore; the pages go back to their arenas. No finalizers run — + // the objects live on at their new addresses. + PageInfo* pg; + while ((pg = (PageInfo*)evac_pages.head) != NULL) { + _ejs_list_detach_node (&evac_pages, (EJSListNode*)pg); + memset (pg->page_start, 0xa7, PAGE_SIZE); // 0xa7: FORWARDED must stay clear in poison + memset (pg->page_bitmap, CELL_FREE, pg->num_cells * sizeof(BitmapCell)); + pg->num_free_cells = pg->num_cells; + pg->bump_ptr = pg->page_start; + Arena* arena = (Arena*)PTR_TO_ARENA(pg->page_start); + EJS_LIST_PREPEND (pg, arena->free_pages); + compact_freed_pages++; + } + + if (gc_profile) + _ejs_log ("EJS_GC_PROFILE: compact: moved=%llu freed-pages=%llu\n", + (unsigned long long)(compact_moved_objs - moved_before), + (unsigned long long)(compact_freed_pages - freed_before)); +} +// ============== end mostly-copying major compaction ====================== + static void _ejs_gc_collect_inner(EJSBool shutting_down) { @@ -2694,6 +3042,13 @@ _ejs_gc_collect_inner(EJSBool shutting_down) sweep_heap(); + // mostly-copying: evacuate the sparse pages' unpinned live + // cells, rewrite every reference, return emptied pages to their + // arenas. (Skipped on the shutdown collection — nothing left to + // move for.) + if (compact_enabled && !shutting_down) + compact_old_gen(); + // the remembered state may dangle into cells this sweep just // freed — rebuild it from the live old gen if (!shutting_down) @@ -2787,9 +3142,10 @@ calc_heap_size() // growing live set makes total GC work quadratic in heap size (shapes // shapes moved per-object property storage into the GC heap, which pushed // stage2's self-compile off that cliff — hours of back-to-back full -// marks of a ~900MB heap). Letting the heap grow ~50% between full -// collections keeps total mark work linear; programs whose footprint -// stays under 120MB see the old 60MB cadence exactly. +// marks of a ~900MB heap). Letting the heap grow ~gc_growth_pct% +// between full collections keeps total mark work linear (see +// full_gc_trigger; compaction shrinks this after a drop in live set, +// so the cadence adapts back down too). static size_t heap_size_at_last_gc = 0; void @@ -2912,7 +3268,7 @@ static GCObjectPtr alloc_from_los(size_t size, EJSScanType scan_type) { // allocate enough space for the object, our header, and our bitmap. leave room enough to align the return value - LargeObjectInfo *rv = alloc_from_os(size + sizeof(LargeObjectInfo) + 16, 0); + LargeObjectInfo *rv = alloc_from_os(size + sizeof(LargeObjectInfo) + 16); if (rv == NULL) return NULL; @@ -2931,7 +3287,7 @@ alloc_from_los(size_t size, EJSScanType scan_type) rv->alloc_size = size; conservative_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); - los_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); + los_ranges_add (rv); EJS_LIST_PREPEND (rv, los_list); //_ejs_log ("alloc_from_los returning %p\n, los_list = %p\n", rv->page_info.page_start, los_list); return rv->page_info.page_start; @@ -2940,7 +3296,10 @@ alloc_from_los(size_t size, EJSScanType scan_type) static void release_to_los (LargeObjectInfo *lobj) { - release_to_os (lobj, lobj->alloc_size); + los_ranges_remove (lobj); + // the mapping covers the header + bitmap slop too, not just the + // payload (releasing only alloc_size leaked the tail page) + release_to_os (lobj, lobj->alloc_size + sizeof(LargeObjectInfo) + 16); } size_t alloc_size = 0; @@ -3003,10 +3362,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) if (!gc_disabled) { char *gc_reason = NULL; - size_t gc_trigger = 60 * 1024 * 1024; - if (heap_size_at_last_gc / 2 > gc_trigger) - gc_trigger = heap_size_at_last_gc / 2; - if (alloc_size - alloc_size_at_last_gc >= gc_trigger) { + if (alloc_size - alloc_size_at_last_gc >= full_gc_trigger()) { gc_reason = "alloc_size"; } else if (!nursery_enabled && collect_every_alloc && collect_every_alloc == num_allocs) { gc_reason = "every_n_alloc"; @@ -3216,6 +3572,12 @@ static EJS_NATIVE_FUNC(_ejs_GC_collect) { return _ejs_undefined; } +// committed old-gen page bytes (the compaction gate's observable: +// this number DROPS when the heap shrinks) +static EJS_NATIVE_FUNC(_ejs_GC_heapSize) { + return NUMBER_TO_EJSVAL((double)calc_heap_size()); +} + static EJS_NATIVE_FUNC(_ejs_GC_dumpAllocationStats) { char* tag = NULL; @@ -3300,6 +3662,7 @@ _ejs_GC_init(ejsval ejs_obj) #define OBJ_METHOD(x) EJS_INSTALL_ATOM_FUNCTION(_ejs_GC, x, _ejs_GC_##x) OBJ_METHOD(collect); + OBJ_METHOD(heapSize); OBJ_METHOD(dumpAllocationStats); OBJ_METHOD(dumpLiveStrings); From d48cf69da0412e01113edffba7a78cf30d72b1d4 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 08:54:56 -0700 Subject: [PATCH 121/146] =?UTF-8?q?eir:=20compiler-P1=20(P5.4)=20=E2=80=94?= =?UTF-8?q?=20optimizer=20residue:=20SSA=20cleanups,=20type=20lattice,=20s?= =?UTF-8?q?lot=20CSE,=20devirt?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The last P5 phase. New passes (lib/eir/cleanup.ts, lib/eir/devirt.ts): - trust-free type lattice over boxed values (const kinds, fixed-result ops, block-param meets to fixpoint) — sound with no oracle, so it fires on flag-off compiles; - cleanup fixpoint (runs after the region passes, foldUnboxOfBox's reason): host-evaluated primitive const folding (string-minting, string relationals, and -0 equality excluded — each argued from a known host/runtime divergence), runtime-mapping typeof folds, typeof x === "T" -> typeof_is (op existed, never minted; emit case added), known-truthiness/never-shaped branch folding, logical_not branch inversion, trivial block-param pruning, and lattice-typed f64 lowering: generic arith over proven numbers computes unboxed with NO guard — a flag-off 50M-iter loop kernel drops 1.3s -> 0.09s (~14x, 2.8x faster than node); - module-slot load CSE (before the region passes): block-local availability + store-to-load forwarding, and a stable-slot tier (single store in the run-once toplevel entry); toplevel receivers stop reloading per access, so shape regions merge at toplevel (the shapes-P3 note); - direct-call devirtualization beyond the self binding: SSA-visible closures and stable %self slots go direct (1,483 sites across the compiler self-compile; esprima alone 878); class-ctor-marked closures and env-using callees decline, fail closed. Pre-existing bugs the new passes flushed out (all fixed): - Map.prototype.delete was an unimplemented 2015 stub (runtime); first compiler-side caller was the CSE kill set — pinned by map6.js; - ejs-llvm had no FP IRBuilder bindings beyond createFAdd (flag-off compiles never emitted f64 before): FSub/FMul/FDiv/FCmpOLT added; - the emitter's double-const cache collided -0 with +0, and the fix's guard itself had to dodge the strict_eq -0===0 tag-compare quirk to survive self-hosting (1/n === -Infinity form); - generator suspension breaks slot stability mid-activation: suspendable functions decline the CSE exemptions. Gates: test-eir (17 new tests) + lowtier green; stages 0-3 + shapes-off green (stage2/3 fixed point holds); --types diff lane 474 files 0-divergent 0-compile-fail; types-bench2 0.21s vs 0.26s off; self-hosted self-compile 57.9s (inside the gc-P4 band). EJS_NO_EIR_CLEANUP / EJS_NO_SLOT_CSE / EJS_NO_DEVIRT bisect. Co-Authored-By: Claude Fable 5 --- docs/compiler-p1-results.md | 155 +++++ docs/compiler-plan.md | 57 +- docs/plans.md | 7 +- ejs-llvm/ejs-llvm-atoms.h | 4 + ejs-llvm/irbuilder.cpp | 36 ++ lib/compiler.ts | 10 +- lib/eir/cleanup.ts | 900 +++++++++++++++++++++++++++++ lib/eir/devirt.ts | 223 +++++++ lib/eir/emit.ts | 12 + lib/eir/integrate.ts | 46 +- lib/eir/optimize.ts | 54 +- lib/eir/tests.ts | 351 ++++++++++- runtime/ejs-map.c | 21 +- test/expected/map6.js.expected-out | 9 + test/map6.js | 31 + 15 files changed, 1892 insertions(+), 24 deletions(-) create mode 100644 docs/compiler-p1-results.md create mode 100644 lib/eir/cleanup.ts create mode 100644 lib/eir/devirt.ts create mode 100644 test/expected/map6.js.expected-out create mode 100644 test/map6.js diff --git a/docs/compiler-p1-results.md b/docs/compiler-p1-results.md new file mode 100644 index 00000000..082f91a6 --- /dev/null +++ b/docs/compiler-p1-results.md @@ -0,0 +1,155 @@ +# compiler-P1 results — optimizer residue (plans P5.4) + +Phase record for compiler-plan.md's compiler-P1: the SSA cleanups, +the type lattice, module-slot load CSE, and direct-call +devirtualization. Landed 2026-07-26 on `eir`. + +## What landed + +New passes (`lib/eir/cleanup.ts`, `lib/eir/devirt.ts`), wired in +`optimize.ts` / `integrate.ts`: + +- **Type lattice** (`computeLattice`): trust-free flat lattice over + boxed values — const kinds, fixed-result generic ops (`sub`/`mul`/ + `div`/`mod`/bit ops/`neg`/`unary_plus` → number; compares/`logical_not`/ + `instanceof`/`in`/`typeof_is` → boolean; allocation ops → object; + `make_closure` → function; `typeof` → string; `add`'s operand rule), + block-param meets iterated to fixpoint. No oracle input, so it is + sound (and fires) on flag-off compiles. +- **Cleanup fixpoint** (`cleanupFunction`, runs LAST in + `optimizeFunction` — after the region passes, for foldUnboxOfBox's + reason: folding arithmetic earlier perturbs the exact IR shapes the + region matchers verify): + - primitive-const folding, evaluated in the hosting engine (host and + runtime implement the same ES semantics for primitive arithmetic). + Fail-closed exclusions, each argued from a known host/runtime + divergence: no folds that mint a string from non-strings (number + formatting is the runtime's), no string relational compares + (collation), no equality over `-0` (the runtime's strict_eq leads + with a NaN-box tag compare, so `-0 === 0` is false there — the + math2.js xfail — and a self-hosted compiler would fold it the + runtime's way, breaking stage byte-identity); + - `typeof` folds matching the RUNTIME's mapping (`null` → `"null"`, + the documented quirk); + - `typeof x === "T"` → `typeof_is` (the op existed in ops.ts but was + never minted; the emit case now calls `_ejs_op_typeof_is_`); + - branch folding: cond_br on known-truthiness `to_boolean` + (consts; lattice undefined/null falsy, object/function truthy), + never-number `has_tag` FALSE folds, never-shaped `has_shape` + FALSE folds; `to_boolean(logical_not x)` inverts the branch + instead of calling `_ejs_op_not` + `_ejs_truthy`; + - trivial block-param pruning (the SSA form of copy propagation); + - **lattice-typed f64 lowering** — the "feed the low tier beyond + the oracle" item: generic add/sub/mul/div both of whose operands + are proven numbers compute unboxed with NO guard (`(a*1)+(b*1)` + emits `f64_add` on any compile); `lt`/`gt` feed cond_br through + `f64_lt` when the whole same-block lt/to_boolean/cond_br chain + rewrites; `unary_plus` on a proven number is the identity. + `EJS_NO_EIR_CLEANUP` bisects the whole group. +- **Module-slot load CSE** (`cseModuleSlotLoads`, runs BEFORE the + region passes): block-local availability with store-to-load + forwarding, killed at CALL-effect instructions; plus a dominance + tier over STABLE %self slots — exactly one static store, sitting in + the toplevel entry block. Stability argument: the module init flag + is set BEFORE the body runs (compiler.ts emitModuleResolution), so + the toplevel executes at most once per process; a suspended init's + remaining stores can only run after a callee returns, so a stable + slot never changes during any activation. Export-accessor setters + count as stores, so an externally-writable export never qualifies. + In the toplevel, every load the store comes-before folds to the + stored VALUE; in other functions, dominated loads fold to their + dominators. `EJS_NO_SLOT_CSE` bisects. +- **Devirtualization** (`devirtualizeModule`, module pass in + integrate.ts, runs AFTER specialization + ctor-sink so it never + starves the strictly-better call_typed rewrite): SSA-visible `call` + of a `make_closure` goes direct with the closure's env; a call + through a single-store %self slot goes direct with an undefined env + when the callee's %env param is entirely unused (load-observes-store + proven via the specialize.ts toplevel-entry prefix rule or + same-function dominance). What invoke_closure does that a direct + call skips: IS_FUNCTION (statically true) and the class-constructor + TypeError — so any function whose closure could reach + `set_constructor_kind_*` declines, and an unenumerable marking + operand declines the whole module (fail closed). `EJS_NO_DEVIRT` + bisects. + +## Fallout fixed en route + +The phase's passes were the first to exercise several dormant paths; +four real pre-existing bugs fell out (the EIR-flush "27 latent bugs" +precedent, continued): + +- **`Map.prototype.delete` was an unimplemented stub** + (runtime/ejs-map.c `_ejs_map_delete`: spec steps in comments, + `return _ejs_false;` since 2015). cleanup.ts's CSE was the first + compiler code to call Map.delete, so the SELF-HOSTED compiler's + availability-kill silently kept stale entries and folded reloads + across calls (stage1: updateassign1's compound-assign getter count, + proxies, Symbol.hasInstance — 8 suite failures). Implemented via + the Set.delete pattern (key/value → NO_ITER_VALUE magic; set/get/ + size/iteration already skip empties). +- **ejs-llvm had no FP IRBuilder bindings beyond createFAdd**. + Flag-off compiles never emitted f64 ops before the lattice pass, so + a SELF-HOSTED compile that reached emit's f64 cases read a missing + native method (boxed null) and threw "object not a function" — + `createFSub`/`createFMul`/`createFDiv`/`createFCmpOLT` (+ atoms) + added. (Under node, node-llvm always had them — stage0 green while + stage1 crashed, which is what made this hunt confusing.) +- **Emitter double-const cache `-0` collision** (compiler.ts + `loadDoubleEjsValue`): cache key was `num_${n}` and `String(-0)` is + `"0"` — a folded `-0` const emitted before a `+0` in the same + function hijacked its cache slot (caught by the lowtier lane: + `1/0` printed `-Infinity`). And the first fix's guard + (`n === 0 && 1/n < 0`) was itself disabled under self-host by the + strict_eq `-0 === 0` tag-compare quirk — the final test is + `1/n === -Infinity`, quirk-proof under both hosts. cleanup.ts's + `isNegZeroConst` uses the same form for the same reason. +- Two pre-existing guard-merge unit tests pinned the post-merge slow + chain as fully generic; the slow `add` over (proven-number) mul + results now lowers to f64, and the tests pin the new shape. + +Soundness holes found by the gates and closed: + +- has_tag FALSE-folding was removed from foldBranches: a boxed-repr + slot_store's verifier proof IS a dominating has_tag=false fact, and + folding the branch deleted the fact out from under the surviving + store (the --types lane failed to compile every class file). +- Suspension awareness in CSE: a desugared generator body's + activation can see the toplevel's remaining stores run mid-flight + (create generator → drive it → store → resume), so functions + containing generator_* runtime calls decline both the stable-slot + dominance tier and the stable-survives-CALL exemption. + +## Gate results (2026-07-28) + +- `//:test-eir` unit tests green (17 new: cleanup folds, lattice + lowering, trivial params, slot CSE incl. stability attacks and the + generator-suspension decline, devirt incl. ctor-kind and env-use + declines, bisect flags); `//:test-eir-lowtier` green. +- Full stage matrix green: `test-stage0` through `test-stage3` + + `test-stage1-shapes-off` — the stage2/stage3 fixed point survives + the compiler being optimized by (and running) the new passes. + New suite test `map6.js` pins the Map.delete fix under every stage. +- `--types` diff lane: 474 files — 473 identical, **0 divergent**, + 1 N/A (the standing tester.js esprima gap), 0 compile failures. +- Toplevel shape-region merging (the shapes-P3 note this phase + unblocks): `const p = {x:1,y:2}; console.log(p.x + p.y + p.x)` + compiles to 2 has_shape guards with CSE vs 3 without + (`p.x + p.x` after a store pair: 3 vs 4) — reloads no longer break + receiver identity at toplevel. +- Self-compile telemetry (node-hosted `-d` over the whole compiler, + 38 modules): 1,483 call sites devirtualized (esprima 878, + escodegen 225 — closure dispatch off the parser's hot paths), + 779 slot loads CSE'd, 580 lattice-typed ops lowered to f64, + 598 branches folded, 85 consts folded, 57 `typeof` tests rewritten + to typeof_is, 45 trivial params pruned. +- Benchmarks: + - **flag-off loop kernel** (`s = s + i*2 - i` ×50M, no --types): + **0.09s vs 1.3s with cleanup off (~14×), 2.8× faster than node** + (0.25s) — the lattice proves the loop-carried param is a number + (init const + f64-add back-edge meet) and the whole loop computes + unboxed with no guard, on a plain compile. + - types-bench2 (--types): 0.21s vs 0.26s with the new passes off + (~20%). + - Self-hosted self-compile: 57.9s — inside the gc-P4 56–64s band; + the new passes' compile-time cost is absorbed. diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md index 417112db..06103241 100644 --- a/docs/compiler-plan.md +++ b/docs/compiler-plan.md @@ -29,7 +29,8 @@ shaped-world continuation), shape-guard regions (see shapes-plan). ## Phases -- [ ] **compiler-P1 — Optimizer residue.** The items from the +- [x] **compiler-P1 — Optimizer residue.** DONE 2026-07-28 — + compiler-p1-results.md has the gate numbers. The items from the original optimization list not owned by sinking-plan or shapes-plan: - the usual SSA passes where they pay: constant/copy @@ -41,6 +42,60 @@ shaped-world continuation), shape-guard regions (see shapes-plan). - slot-load CSE for toplevel receivers (each module-slot access currently reloads, which blocks guard-region merging at toplevel — noted at shapes-P3). + Landed shape (`lib/eir/cleanup.ts`, `lib/eir/devirt.ts`): + - **Type lattice**: trust-free flat lattice over boxed values + (const kinds, fixed-result generic ops, allocation ops, + `add`'s operand rule, block-param meets to fixpoint); sound + with no oracle, so it fires on flag-off compiles too. + - **Cleanup fixpoint** (runs LAST in optimizeFunction, after the + region passes for the same reason foldUnboxOfBox does): + primitive-const folding evaluated in the hosting engine + (string-minting folds and string relationals excluded — + number formatting and collation stay the runtime's; equality + on `-0` declined — the runtime's tag-compare quirk (math2.js + xfail) would otherwise diverge from the host AND break stage + identity under self-compile); typeof folds matching the + RUNTIME's mapping (null→"null" quirk included); + `typeof x === "T"` → the (previously unminted) `typeof_is` + op, now emitted via `_ejs_op_typeof_is_*`; cond_br folding on + known truthiness / never-number `has_tag` / never-shaped + `has_shape`; `to_boolean(logical_not x)` branch inversion; + trivial block-param pruning (the SSA form of copy + propagation); lattice-typed f64 lowering — generic + add/sub/mul/div both of whose operands are proven numbers + compute unboxed with NO guard, and lt/gt feed cond_br via + f64_lt when the whole same-block chain rewrites. + `EJS_NO_EIR_CLEANUP` bisects. + - **Module-slot load CSE** (before the region passes — receiver + identity is what lets toplevel shape regions merge): + block-local availability with store-to-load forwarding, + killed at CALL-effect instructions; plus a dominance tier for + STABLE %self slots (exactly one static store, in the toplevel + entry block — the init-flag-before-body ordering makes the + toplevel run-once, so such a slot never changes during any + activation; accessor setters count as stores, so externally + writable exports never qualify). `EJS_NO_SLOT_CSE` bisects. + - **Devirtualization** (module pass, runs after specialization + so it never starves the strictly-better call_typed rewrite): + SSA-visible `call` of a `make_closure` goes direct with the + closure's env; calls through a single-store %self slot go + direct with an undefined env when the callee's %env param is + unused (load-observes-store proven via the specialize.ts + prefix rule or same-function dominance). Functions whose + closures could reach set_constructor_kind_* decline (the + invoke_closure class-ctor TypeError must survive); an + unenumerable marking operand declines the whole module. + `EJS_NO_DEVIRT` bisects. + - Fallout fixed en route (compiler-p1-results.md has the full + stories): `Map.prototype.delete` was an unimplemented runtime + stub (first compiler-side caller was this phase's CSE); + ejs-llvm lacked every FP IRBuilder binding except createFAdd + (flag-off compiles never emitted f64 before the lattice + pass); the emitter's double-const cache collided `-0` with + `+0` (and the fix's guard had to avoid the strict_eq `-0 === + 0` tag-compare quirk to work under self-host); generator + suspension makes "stable" slots unstable mid-activation — + suspendable functions decline the CSE exemptions. - [ ] **compiler-P2 — TypeScript port of the compiler.** The compiler converts from JS to TypeScript (largely done for lib/eir/ and lib/*.ts — the strict-TS conversion landed with the EIR work); diff --git a/docs/plans.md b/docs/plans.md index 0a1af0e4..4c2b7ae6 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -73,7 +73,7 @@ gc-plan.md; numbers in gc-p0/p2/p3-results.md. - [x] **P4.4** emitter gc-frames: precise relocatable JS roots + env slot-address inlining + move-everything stress (gc-P3). -## P5 — Allocation elimination [~] +## P5 — Allocation elimination [x] Delete the allocations the mover made cheap. Detail: sinking-plan.md. @@ -83,8 +83,9 @@ Delete the allocations the mover made cheap. Detail: sinking-plan.md. types-bench2 alloc loop (sinking-P2). - [x] **P5.3** flow-sensitive field writes, partial escapes, rest_args/args_obj (sinking-P3). -- [ ] **P5.4** optimizer residue: SSA cleanups, type lattice, - slot-load CSE for toplevel receivers (compiler-P1). +- [x] **P5.4** optimizer residue: SSA cleanups, type lattice, + slot-load CSE for toplevel receivers (compiler-P1). DONE + 2026-07-28 — docs/compiler-p1-results.md. ## P6 — Compacting, shape-fused GC diff --git a/ejs-llvm/ejs-llvm-atoms.h b/ejs-llvm/ejs-llvm-atoms.h index cbf71c3e..b5e473a8 100644 --- a/ejs-llvm/ejs-llvm-atoms.h +++ b/ejs-llvm/ejs-llvm-atoms.h @@ -52,6 +52,10 @@ EJS_ATOM(createFPCast) EJS_ATOM(createCall) EJS_ATOM(createInvoke) EJS_ATOM(createFAdd) +EJS_ATOM(createFSub) +EJS_ATOM(createFMul) +EJS_ATOM(createFDiv) +EJS_ATOM(createFCmpOLT) EJS_ATOM(createAlloca) EJS_ATOM(createLoad) EJS_ATOM(createStore) diff --git a/ejs-llvm/irbuilder.cpp b/ejs-llvm/irbuilder.cpp index 759d28fd..b91fa96b 100644 --- a/ejs-llvm/irbuilder.cpp +++ b/ejs-llvm/irbuilder.cpp @@ -126,6 +126,38 @@ namespace ejsllvm { return Value_new (_llvm_builder.CreateFAdd(left, right, name)); } + static EJS_NATIVE_FUNC(IRBuilder_createFSub) { + REQ_LLVM_VAL_ARG(0, left); + REQ_LLVM_VAL_ARG(1, right); + FALLBACK_EMPTY_UTF8_ARG(2, name); + + return Value_new (_llvm_builder.CreateFSub(left, right, name)); + } + + static EJS_NATIVE_FUNC(IRBuilder_createFMul) { + REQ_LLVM_VAL_ARG(0, left); + REQ_LLVM_VAL_ARG(1, right); + FALLBACK_EMPTY_UTF8_ARG(2, name); + + return Value_new (_llvm_builder.CreateFMul(left, right, name)); + } + + static EJS_NATIVE_FUNC(IRBuilder_createFDiv) { + REQ_LLVM_VAL_ARG(0, left); + REQ_LLVM_VAL_ARG(1, right); + FALLBACK_EMPTY_UTF8_ARG(2, name); + + return Value_new (_llvm_builder.CreateFDiv(left, right, name)); + } + + static EJS_NATIVE_FUNC(IRBuilder_createFCmpOLT) { + REQ_LLVM_VAL_ARG(0, left); + REQ_LLVM_VAL_ARG(1, right); + FALLBACK_EMPTY_UTF8_ARG(2, name); + + return Value_new (_llvm_builder.CreateFCmpOLT(left, right, name)); + } + static EJS_NATIVE_FUNC(IRBuilder_createAlloca) { REQ_LLVM_TYPE_ARG(0, ty); FALLBACK_EMPTY_UTF8_ARG(1, name); @@ -408,6 +440,10 @@ namespace ejsllvm { OBJ_METHOD(createCall); OBJ_METHOD(createInvoke); OBJ_METHOD(createFAdd); + OBJ_METHOD(createFSub); + OBJ_METHOD(createFMul); + OBJ_METHOD(createFDiv); + OBJ_METHOD(createFCmpOLT); OBJ_METHOD(createAlloca); OBJ_METHOD(createLoad); OBJ_METHOD(createStore); diff --git a/lib/compiler.ts b/lib/compiler.ts index bb12a3c3..57eee84c 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -351,7 +351,15 @@ class LLVMIRVisitor implements VisitorSurface { } loadDoubleEjsValue(n: number): llvm.Value { - return this.loadCachedEjsValue(`num_${n}`, (alloca) => this.storeDouble(alloca, n)); + // -0 stringifies as "0": without the special case it would share + // +0's cache slot (whichever the function emits first wins, and + // 1/x flips sign — found by the optimizer's neg-of-const fold). + // The test is 1/n === -Infinity, NOT `n === 0 && 1/n < 0`: under + // the self-hosted runtime `-0 === 0` is false (the strict_eq + // tag-compare quirk, math2.js), which silently disabled the + // special case exactly where it mattered. + const key = 1 / n === -Infinity ? "num_-0" : `num_${n}`; + return this.loadCachedEjsValue(key, (alloca) => this.storeDouble(alloca, n)); } loadNullEjsValue(): llvm.Value { return this.loadCachedEjsValue("null", (alloca) => this.storeNull(alloca)); diff --git a/lib/eir/cleanup.ts b/lib/eir/cleanup.ts new file mode 100644 index 00000000..e94a9553 --- /dev/null +++ b/lib/eir/cleanup.ts @@ -0,0 +1,900 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// compiler-P1 "optimizer residue": the classic SSA cleanups and the +// type lattice. +// +// (a) a trust-free TYPE LATTICE over the boxed `any` values — +// value-intrinsic tags (const kinds, allocation ops, generic ops +// with fixed result types) met over block-param edges to a +// fixpoint. Nothing here consumes an oracle claim; every tag is +// proven from the IR, so the lattice is sound on flag-off +// compiles too. +// (b) CONSTANT FOLDING over primitive consts, evaluated in the +// hosting engine (both host and target implement the same ES +// semantics for primitive arithmetic/comparison; folds that +// would mint a STRING from a non-string — number formatting — +// are excluded, as are string relational compares, so a host/ +// runtime divergence in either can never be baked in at compile +// time. typeof folds follow the RUNTIME's mapping, including +// its `typeof null == "null"` quirk). +// (c) REDUNDANT to_boolean/typeof ELIMINATION: cond_br on a +// known-truthiness to_boolean folds; `to_boolean(logical_not x)` +// inverts the branch instead of calling _ejs_op_not + _ejs_truthy; +// `typeof x === "T"` becomes the single-tag-test typeof_is op. +// (d) TRIVIAL BLOCK PARAM pruning (the SSA form of copy +// propagation): a param fed the same SSA value on every edge is +// that value (the value dominates every pred, hence the block, +// hence every use of the param). +// (e) LATTICE-TYPED LOW-TIER LOWERING — the "feeding the low-tier +// ops beyond what the oracle already types" item: a generic +// add/sub/mul/div both of whose operands the lattice proves +// number computes bit-identically in f64 (ES semantics; the +// guard-region soundness inventory's argument), so it lowers to +// unbox/f64_*/box with no guard at all. lt/gt lower to f64_lt +// when their only consumer is a same-block to_boolean + cond_br. +// (f) MODULE-SLOT LOAD CSE (the toplevel-receiver reload noted at +// shapes-P3): +// - block-local availability, killed at CALL-effect +// instructions (arbitrary JS may re-enter this module's +// stores) unless the slot is single-store (below), with +// store-to-load forwarding; +// - single-store %self slots: the module init flag is set +// BEFORE the toplevel body runs (compiler.ts +// emitModuleResolution), so the toplevel executes at most +// once per process and a %self slot whose ONLY static store +// sits in the toplevel entry block is immutable once +// written. In the toplevel itself, every load the store +// comes-before folds to the stored value; in any other +// function the slot cannot change during an activation (the +// suspended init's remaining stores can only run after this +// function returns; re-entry is blocked by the flag), so a +// dominated load folds to its dominator. The census counts +// EVERY module_slot_store — including export-accessor +// setters — so an externally-writable binding never +// qualifies. +// +// Pass placement (optimize.ts): CSE runs before the guard/shape region +// passes (receiver identity is what lets toplevel regions merge); the +// folding passes run AFTER them — like foldUnboxOfBox, folding +// arithmetic earlier would perturb the exact IR shapes the region +// matchers verify. + +import { Func, Block, Inst, replaceAllUses } from "./ir"; +import type { Target } from "./ir"; +import { Effect, opInfo } from "./ops"; +import { condBrToBr, sweepUnreachableBlocks } from "./optimize-guards"; +import { computeRPO, computeDominators, dominates } from "./verifier"; +import type { OptStats } from "./optimize"; + +// --- the type lattice ------------------------------------------------------- + +// flat lattice over the boxed value tags: undefined (in the array) is +// bottom (no information yet), "top" is no-information-possible. The +// tags mirror the runtime's tag taxonomy (typeof-null quirk included: +// null is its own tag here AND in _ejs_op_typeof). +export type LatticeTag = + | "number" + | "string" + | "boolean" + | "undefined" + | "null" + | "object" + | "function" + | "top"; + +export type Lattice = (LatticeTag | undefined)[]; + +// generic ops whose result is always a Number (ES: they apply +// ToNumber/ToInt32/ToUint32 and produce a Number or throw; +// runtime/ejs-ops.c agrees — only NUMBER_TO_EJSVAL returns) +const NUMBER_RESULT = new Set([ + "sub", + "mul", + "div", + "mod", + "neg", + "unary_plus", + "bitand", + "bitor", + "bitxor", + "shl", + "shr", + "ushr", + "bitnot", +]); + +// generic ops whose result is always a Boolean +const BOOLEAN_RESULT = new Set([ + "lt", + "le", + "gt", + "ge", + "loose_eq", + "loose_neq", + "strict_eq", + "strict_neq", + "logical_not", + "instanceof", + "in", + "typeof_is", +]); + +// ops that always produce a (non-callable) Object +const OBJECT_RESULT = new Set([ + "make_object", + "make_object_shaped", + "make_array", + "make_regexp", + "args_obj", + "rest_args", + "array_from_spread", + "template_callsite", +]); + +function meet(a: LatticeTag | undefined, b: LatticeTag | undefined): LatticeTag | undefined { + if (a === undefined) return b; + if (b === undefined) return a; + return a === b ? a : "top"; +} + +function constTag(inst: Inst): LatticeTag { + switch (inst.imms["kind"] as string) { + case "number": + return "number"; + case "atom": + return "string"; + case "boolean": + return "boolean"; + case "undefined": + return "undefined"; + case "null": + return "null"; + default: + return "top"; + } +} + +// one evaluation of the transfer function for `inst` under `tags` +function instTag(inst: Inst, tags: Lattice): LatticeTag | undefined { + const op = inst.op; + if (op === "const") return constTag(inst); + if (op === "box_f64") return "number"; + if (NUMBER_RESULT.has(op)) return "number"; + if (BOOLEAN_RESULT.has(op)) return "boolean"; + if (OBJECT_RESULT.has(op)) return "object"; + if (op === "make_closure") return "function"; + if (op === "typeof") return "string"; + if (op === "add") { + // string if either side is a string (ES: a string primitive on + // either side means concatenation); number only if both sides + // are numbers; anything else can go either way (objects' + // ToPrimitive decides at runtime) + const a = tags[inst.operands[0]!.id]; + const b = tags[inst.operands[1]!.id]; + if (a === "string" || b === "string") return "string"; + if (a === undefined || b === undefined) return undefined; + if (a === "number" && b === "number") return "number"; + return "top"; + } + if (op === "blockparam") { + const b = inst.block!; + // entry params are the calling convention's values; exception + // params carry whatever was thrown + if (b === b.fn.entry || inst.isException || b.isCatch) return "top"; + if (b.predEdges.length === 0) return undefined; // unreachable + const argIdx = b.argIndexOfParam(inst); + let t: LatticeTag | undefined = undefined; + for (const e of b.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; + if (!arg) return "top"; + if (arg === inst) continue; // self-edge: vacuous + t = meet(t, tags[arg.id]); + if (t === "top") return t; + } + return t; + } + return "top"; +} + +// fixpoint over the whole function. The lattice has height 2, so the +// loop terminates quickly; the bound is belt and braces. +export function computeLattice(fn: Func): Lattice { + const tags: Lattice = new Array(fn.next_value_id); + for (let round = 0; round < 20; round++) { + let changed = false; + fn.forEachInst((inst) => { + const t = instTag(inst, tags); + if (t !== undefined && tags[inst.id] !== t) { + // monotone by construction (undefined -> tag -> top) + tags[inst.id] = t; + changed = true; + } + }); + if (!changed) break; + } + return tags; +} + +// --- constant folding ------------------------------------------------------- + +// the JS payload of a primitive const +function constPayload(inst: Inst): unknown { + switch (inst.imms["kind"] as string) { + case "undefined": + return undefined; + case "null": + return null; + default: + return inst.imms["value"]; + } +} + +// rewrite `inst` in place into a primitive const (same Inst object +// keeps every use — the foldUnboxOfBox precedent) +function toConst(inst: Inst, value: unknown, stats: OptStats): void { + let imms: Inst["imms"]; + if (value === undefined) imms = { kind: "undefined" }; + else if (value === null) imms = { kind: "null" }; + else if (typeof value === "number") imms = { kind: "number", value: value }; + else if (typeof value === "boolean") imms = { kind: "boolean", value: value }; + else imms = { kind: "atom", value: String(value) }; + inst.op = "const"; + inst.operands.length = 0; + inst.imms = imms; + inst.type = "any"; + stats.consts_folded++; +} + +// binops foldable by evaluating the SAME ES semantics in the hosting +// engine. Relational ops are restricted to number operands (string +// relational compare is the one place a host/runtime collation +// difference could hide); results are accepted only when they are +// numbers/booleans, or strings made purely from strings. +const EVAL_BINOPS = new Set([ + "add", + "sub", + "mul", + "div", + "mod", + "bitand", + "bitor", + "bitxor", + "shl", + "shr", + "ushr", + "lt", + "le", + "gt", + "ge", + "loose_eq", + "loose_neq", + "strict_eq", + "strict_neq", +]); + +const RELATIONAL = new Set(["lt", "le", "gt", "ge"]); + +// equality ops decline -0 operands: the runtime's strict_eq leads with +// a NaN-box TAG compare, so `-0 === 0` is FALSE there (the math2.js +// xfail) while the hosting engine says true — and a self-hosted +// compiler would fold it the runtime's way, so folding it at all would +// also break stage byte-identity. Fail closed; the runtime decides. +const EQUALITY = new Set(["strict_eq", "strict_neq", "loose_eq", "loose_neq"]); + +function isNegZeroConst(c: Inst): boolean { + if (c.imms["kind"] !== "number") return false; + const v = c.imms["value"] as number; + // NOT `v === 0 && 1/v < 0`: under the self-hosted runtime -0 === 0 + // is FALSE (the same quirk this decline exists for), which would + // disable the decline exactly when the compiler runs under ejs + return 1 / v === -Infinity; +} + +/* eslint-disable @typescript-eslint/no-explicit-any */ +function evalBinop(op: string, x: any, y: any): unknown { + switch (op) { + case "add": + return x + y; + case "sub": + return x - y; + case "mul": + return x * y; + case "div": + return x / y; + case "mod": + return x % y; + case "bitand": + return x & y; + case "bitor": + return x | y; + case "bitxor": + return x ^ y; + case "shl": + return x << y; + case "shr": + return x >> y; + case "ushr": + return x >>> y; + case "lt": + return x < y; + case "le": + return x <= y; + case "gt": + return x > y; + case "ge": + return x >= y; + case "loose_eq": + return x == y; + case "loose_neq": + return x != y; + case "strict_eq": + return x === y; + case "strict_neq": + return x !== y; + default: + return undefined; + } +} + +function evalUnop(op: string, x: any): unknown { + switch (op) { + case "neg": + return -x; + case "unary_plus": + return +x; + case "bitnot": + return ~x; + case "logical_not": + return !x; + default: + return undefined; + } +} +/* eslint-enable @typescript-eslint/no-explicit-any */ + +// the runtime's typeof string for a lattice tag (ejs's typeof maps null +// to "null", not "object" — _ejs_op_typeof; folds must match the +// runtime, not the spec) +const TYPEOF_OF_TAG: Record = { + number: "number", + string: "string", + boolean: "boolean", + undefined: "undefined", + null: "null", + object: "object", + function: "function", +}; + +function foldConstants(fn: Func, tags: Lattice, stats: OptStats): boolean { + let changed = false; + fn.forEachInst((inst) => { + if (inst.targets && inst.targets.length > 0) return; // protected-region terminator + const op = inst.op; + if (op === "typeof") { + const t = tags[inst.operands[0]!.id]; + const s = t && t !== "top" ? TYPEOF_OF_TAG[t] : undefined; + if (s !== undefined) { + toConst(inst, s, stats); + changed = true; + } + return; + } + if (EVAL_BINOPS.has(op)) { + const a = inst.operands[0]!; + const b = inst.operands[1]!; + if (a.op !== "const" || b.op !== "const") return; + if ( + RELATIONAL.has(op) && + (a.imms["kind"] !== "number" || b.imms["kind"] !== "number") + ) + return; + if (EQUALITY.has(op) && (isNegZeroConst(a) || isNegZeroConst(b))) return; + const r = evalBinop(op, constPayload(a), constPayload(b)); + if (typeof r === "number" || typeof r === "boolean") { + toConst(inst, r, stats); + changed = true; + } else if ( + typeof r === "string" && + a.imms["kind"] === "atom" && + b.imms["kind"] === "atom" + ) { + toConst(inst, r, stats); + changed = true; + } + return; + } + if (op === "neg" || op === "unary_plus" || op === "bitnot" || op === "logical_not") { + const a = inst.operands[0]!; + if (a.op !== "const") return; + if (op !== "logical_not" && a.imms["kind"] !== "number") return; + const r = evalUnop(op, constPayload(a)); + if (typeof r === "number" || typeof r === "boolean") { + toConst(inst, r, stats); + changed = true; + } + } + }); + return changed; +} + +// --- typeof_is peephole ----------------------------------------------------- + +// `typeof x === "T"` (either operand order) is a single runtime tag +// test. The rewrite is exact per _ejs_op_typeof's mapping (the +// runtime's typeof_is_ tests the same predicate typeof compares +// against, null quirk included); the typeof goes dead and DCE sweeps +// it. Only the types with runtime.ts entries qualify. +const TYPEOF_IS_TYPES = new Set([ + "object", + "function", + "string", + "number", + "undefined", + "null", + "boolean", +]); + +function typeofIsPeephole(fn: Func, stats: OptStats): boolean { + let changed = false; + fn.forEachInst((inst) => { + if (inst.op !== "strict_eq") return; + let tof = inst.operands[0]!; + let lit = inst.operands[1]!; + if (tof.op !== "typeof") { + const t = tof; + tof = lit; + lit = t; + } + if (tof.op !== "typeof" || tof.targets) return; + if (lit.op !== "const" || lit.imms["kind"] !== "atom") return; + const ty = lit.imms["value"] as string; + if (!TYPEOF_IS_TYPES.has(ty)) return; + inst.op = "typeof_is"; + inst.operands.length = 0; + inst.operands.push(tof.operands[0]!); + inst.imms = { type: ty }; + stats.typeof_rewrites++; + changed = true; + }); + return changed; +} + +// --- branch folding + logical_not inversion --------------------------------- + +// truthiness of a value, when provable: consts decide exactly; +// undefined/null are always falsy; objects and functions are always +// truthy (no document.all in this runtime). +function knownTruthiness(v: Inst, tags: Lattice): boolean | undefined { + if (v.op === "const") return !!constPayload(v); + const t = tags[v.id]; + if (t === "undefined" || t === "null") return false; + if (t === "object" || t === "function") return true; + return undefined; +} + +// tags that can never carry a shape header. NB: there is deliberately +// NO has_tag FALSE-folding here — a boxed-repr slot_store's verifier +// proof IS a dominating has_tag=false fact, and folding the branch +// deletes the fact out from under the surviving store (caught by the +// --types lane on every class file). has_shape folds are safe: the +// slot ops that need the fact live in the folded-away fast arm. +const NEVER_SHAPED = new Set(["number", "string", "boolean", "undefined", "null"]); + +function foldBranches(fn: Func, tags: Lattice, stats: OptStats): boolean { + let changed = false; + // to_boolean use counts, for the inversion's locality check + const uses = new Map(); + fn.forEachInst((inst) => { + for (const o of inst.operands) if (o.op === "to_boolean" || o.op === "logical_not") + uses.set(o, (uses.get(o) || 0) + 1); + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) + if (a && (a.op === "to_boolean" || a.op === "logical_not")) + uses.set(a, (uses.get(a) || 0) + 1); + }); + + for (const b of fn.blocks) { + const term = b.terminator; + if (!term || term.op !== "cond_br") continue; + const cond = term.operands[0]!; + if (cond.op === "to_boolean") { + // invert through logical_not first: branching on !x is + // branching on x with the targets swapped. Sound only when + // this cond_br is the to_boolean's single consumer (the + // rewrite changes its meaning). + let inverted = true; + while (inverted) { + inverted = false; + const src = cond.operands[0]!; + if ( + src.op === "logical_not" && + !src.targets && + uses.get(cond) === 1 && + cond.block === b + ) { + cond.operands[0] = src.operands[0]!; + const t0: Target = term.targets![0]!; + const t1: Target = term.targets![1]!; + term.targets![0] = t1; + term.targets![1] = t0; + // predEdges' targetIndex must track the swap (both + // targets may name the same block — flip each edge + // exactly once) + const targetBlocks = new Set([t0.block, t1.block]); + for (const blk of targetBlocks) { + for (const e of blk.predEdges) { + if (e.inst === term) e.targetIndex = e.targetIndex === 0 ? 1 : 0; + } + } + uses.set(src, (uses.get(src) || 1) - 1); + stats.branches_folded++; + changed = true; + inverted = true; + } + } + const truth = knownTruthiness(cond.operands[0]!, tags); + if (truth !== undefined) { + condBrToBr(fn, b, truth ? 0 : 1); + stats.branches_folded++; + changed = true; + } + } else if (cond.op === "has_shape") { + const t = tags[cond.operands[0]!.id]; + if (t && NEVER_SHAPED.has(t)) { + condBrToBr(fn, b, 1); + stats.branches_folded++; + changed = true; + } + } + } + return changed; +} + +// --- trivial block params --------------------------------------------------- + +// a param fed the same SSA value on every edge (self-edges vacuous) IS +// that value: the value's def dominates every pred's terminator, hence +// the param's block, hence every use of the param. +function pruneTrivialParams(fn: Func, stats: OptStats): boolean { + let changed = false; + for (const b of fn.blocks) { + if (b === fn.entry) continue; // calling convention + for (const p of b.params.slice()) { + if (p.removed || p.isException || p.type !== "any" || p.rawJoin) continue; + if (b.predEdges.length === 0) continue; + const argIdx = b.argIndexOfParam(p); + let v: Inst | null = null; + let ok = true; + for (const e of b.predEdges) { + const arg = e.inst.targets![e.targetIndex]!.args[argIdx]; + if (!arg) { + ok = false; + break; + } + if (arg === p) continue; + if (v === null) v = arg; + else if (v !== arg) { + ok = false; + break; + } + } + if (!ok || v === null) continue; + replaceAllUses(fn, p, v); + b.removeParam(p); + stats.params_pruned++; + changed = true; + } + } + return changed; +} + +// --- lattice-typed low-tier lowering ---------------------------------------- + +const F64_OP: Record = { + add: "f64_add", + sub: "f64_sub", + mul: "f64_mul", + div: "f64_div", +}; + +function insertBefore(fn: Func, anchor: Inst, inst: Inst): Inst { + const b = anchor.block!; + inst.block = b; + b.insts.splice(b.insts.indexOf(anchor), 0, inst); + return inst; +} + +function removeFromBlock(inst: Inst): void { + const b = inst.block!; + const idx = b.insts.indexOf(inst); + if (idx >= 0) b.insts.splice(idx, 1); + inst.block = null; +} + +function latticeLowerArith(fn: Func, tags: Lattice, stats: OptStats): boolean { + let changed = false; + + // use map for the lt/gt consumer-pattern check + const uses = new Map(); + fn.forEachInst((inst) => { + for (const o of inst.operands) { + let l = uses.get(o); + if (!l) uses.set(o, (l = [])); + l.push(inst); + } + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) + if (a) { + let l = uses.get(a); + if (!l) uses.set(a, (l = [])); + l.push(inst); + } + }); + + const bothNumber = (inst: Inst) => + tags[inst.operands[0]!.id] === "number" && tags[inst.operands[1]!.id] === "number"; + + const worklist: Inst[] = []; + fn.forEachInst((inst) => worklist.push(inst)); + + for (const inst of worklist) { + if (!inst.block) continue; + if (inst.targets && inst.targets.length > 0) continue; + const op = inst.op; + + if (F64_OP[op] !== undefined && bothNumber(inst)) { + const a = inst.operands[0]!; + const b = inst.operands[1]!; + if (a.op === "const" && b.op === "const") continue; // constFold's job + const ua = insertBefore(fn, inst, new Inst(fn, "unbox_f64", [a], {})); + const ub = insertBefore(fn, inst, new Inst(fn, "unbox_f64", [b], {})); + const f = insertBefore(fn, inst, new Inst(fn, F64_OP[op]!, [ua, ub], {})); + const boxed = insertBefore(fn, inst, new Inst(fn, "box_f64", [f], {})); + replaceAllUses(fn, inst, boxed); + removeFromBlock(inst); + stats.lattice_arith++; + changed = true; + continue; + } + + if (op === "unary_plus" && tags[inst.operands[0]!.id] === "number") { + // +x for a number x is x + replaceAllUses(fn, inst, inst.operands[0]!); + removeFromBlock(inst); + stats.lattice_arith++; + changed = true; + continue; + } + + if ((op === "lt" || op === "gt") && bothNumber(inst)) { + // only the whole same-block lt/to_boolean/cond_br chain + // rewrites: f64_lt's i1 must not leak anywhere else + const us = uses.get(inst) || []; + if (us.length !== 1) continue; + const tob = us[0]!; + if (tob.op !== "to_boolean" || tob.block !== inst.block) continue; + const tobUses = uses.get(tob) || []; + if (tobUses.length !== 1) continue; + const cbr = tobUses[0]!; + if (cbr.op !== "cond_br" || cbr.block !== inst.block) continue; + const a = inst.operands[0]!; + const b = inst.operands[1]!; + const ua = insertBefore(fn, inst, new Inst(fn, "unbox_f64", [a], {})); + const ub = insertBefore(fn, inst, new Inst(fn, "unbox_f64", [b], {})); + // a > b is b < a for numbers (NaN compares false either way) + const f = + op === "lt" + ? new Inst(fn, "f64_lt", [ua, ub], {}) + : new Inst(fn, "f64_lt", [ub, ua], {}); + insertBefore(fn, inst, f); + cbr.operands[0] = f; + removeFromBlock(tob); + removeFromBlock(inst); + stats.lattice_arith++; + changed = true; + } + } + return changed; +} + +// --- driver ----------------------------------------------------------------- + +export function cleanupFunction(fn: Func, stats: OptStats): boolean { + let any = false; + for (let round = 0; round < 5; round++) { + const tags = computeLattice(fn); + let changed = false; + if (foldConstants(fn, tags, stats)) changed = true; + if (typeofIsPeephole(fn, stats)) changed = true; + if (foldBranches(fn, tags, stats)) { + sweepUnreachableBlocks(fn); + changed = true; + } + if (pruneTrivialParams(fn, stats)) changed = true; + if (latticeLowerArith(fn, tags, stats)) changed = true; + if (!changed) break; + any = true; + } + return any; +} + +// --- module-slot load CSE --------------------------------------------------- + +export function slotKey(module: string, slot: number): string { + return `${module}#${slot}`; +} + +// the STABLE %self slots: exactly one module_slot_store in the whole +// module, sitting in the toplevel's entry block (which has no +// back-edges and — via the init flag set before the body runs — can +// execute at most once per process). A stable slot's value cannot +// change during any function activation: the toplevel's remaining +// stores only resume after a callee returns, and re-entry is blocked +// by the flag. Export-accessor setters are module_slot_stores too, so +// an externally-writable export can never look stable. +export function computeStableSlots(fns: readonly Func[], toplevelName: string): Set { + const count = new Map(); + const storeIn = new Map(); + for (const fn of fns) { + fn.forEachInst((inst) => { + if (inst.op !== "module_slot_store") return; + const key = slotKey(inst.imms["module"] as string, inst.imms["slot"] as number); + count.set(key, (count.get(key) || 0) + 1); + storeIn.set(key, { fn, inst }); + }); + } + const stable = new Set(); + count.forEach((n, key) => { + if (n !== 1 || !key.startsWith("%self#")) return; + const s = storeIn.get(key)!; + if (s.fn.name !== toplevelName) return; + const entry = s.fn.entry; + if (!entry || s.inst.block !== entry || entry.predEdges.length > 0) return; + stable.add(key); + }); + return stable; +} + +// is `a` before `b`: same block by position, else by dominance +function comesBefore(idom: Map, a: Inst, b: Inst): boolean { + const ba = a.block!; + const bb = b.block!; + if (ba === bb) return ba.insts.indexOf(a) < bb.insts.indexOf(b); + return dominates(idom, ba, bb); +} + +export function cseModuleSlotLoads( + fn: Func, + stableSlots: Set | undefined, + stats: OptStats +): boolean { + let changed = false; + + // the stability arguments below reason about one ACTIVATION: a + // suspendable activation (a desugared generator body — its yields + // lower to generator_* runtime calls) can see the toplevel's + // remaining stores run mid-flight, so it gets no exemptions. + let suspends = false; + fn.forEachInst((inst) => { + if ( + inst.op === "call_runtime" && + typeof inst.imms["name"] === "string" && + (inst.imms["name"] as string).indexOf("generator_") === 0 + ) + suspends = true; + }); + + const isStable = (key: string) => !suspends && !!stableSlots && stableSlots.has(key); + + // (1) block-local availability + store-to-load forwarding + for (const b of fn.blocks) { + const avail = new Map(); + for (const inst of b.insts.slice()) { + if (inst.block !== b) continue; // removed below + if (inst.op === "module_slot_load") { + const key = slotKey(inst.imms["module"] as string, inst.imms["slot"] as number); + const prev = avail.get(key); + if (prev) { + replaceAllUses(fn, inst, prev); + removeFromBlock(inst); + stats.slot_loads_cse++; + changed = true; + } else { + avail.set(key, inst); + } + } else if (inst.op === "module_slot_store") { + const key = slotKey(inst.imms["module"] as string, inst.imms["slot"] as number); + avail.set(key, inst.operands[0]!); + } else if ((opInfo(inst.op).effects & Effect.CALL) !== 0) { + // arbitrary JS may execute this module's stores — only + // stable slots survive (their one store cannot run + // mid-activation; see computeStableSlots) + for (const key of Array.from(avail.keys())) { + if (!isStable(key)) avail.delete(key); + } + } + } + } + + // (2) the stable-slot dominance tier + if (!suspends && stableSlots && stableSlots.size > 0) { + const loadsByKey = new Map(); + const storeByKey = new Map(); + fn.forEachInst((inst) => { + if (inst.op === "module_slot_load") { + const key = slotKey(inst.imms["module"] as string, inst.imms["slot"] as number); + let l = loadsByKey.get(key); + if (!l) loadsByKey.set(key, (l = [])); + l.push(inst); + } else if (inst.op === "module_slot_store") { + const key = slotKey(inst.imms["module"] as string, inst.imms["slot"] as number); + storeByKey.set(key, inst); + } + }); + + let idom: Map | null = null; + let blockOrder: Map | null = null; + const domInfo = () => { + if (!idom) { + const { rpo } = computeRPO(fn); + idom = computeDominators(fn, rpo); + blockOrder = new Map(); + rpo.forEach((b, i) => blockOrder!.set(b, i)); + } + return { idom: idom!, blockOrder: blockOrder! }; + }; + + loadsByKey.forEach((loads, key) => { + if (!isStable(key)) return; + const store = storeByKey.get(key); + if (store && store.block) { + // the module's one store lives in THIS function (so + // this IS the toplevel, per computeStableSlots): loads + // the store comes-before fold to the stored value + const { idom } = domInfo(); + const value = store.operands[0]!; + for (const load of loads) { + if (!load.block) continue; // CSE'd by the block-local tier + if (!comesBefore(idom, store, load)) continue; // pre-init read + replaceAllUses(fn, load, value); + removeFromBlock(load); + stats.slot_loads_cse++; + changed = true; + } + } else { + // store elsewhere (the toplevel init): the slot cannot + // change during this activation — dominated loads fold + // to their dominators + const { idom, blockOrder } = domInfo(); + const live = loads.filter((l) => l.block !== null); + live.sort((a, b) => { + const ba = blockOrder.get(a.block!) ?? 0; + const bb = blockOrder.get(b.block!) ?? 0; + if (ba !== bb) return ba - bb; + return a.block!.insts.indexOf(a) - b.block!.insts.indexOf(b); + }); + const survivors: Inst[] = []; + for (const load of live) { + let folded = false; + for (const p of survivors) { + if (comesBefore(idom, p, load)) { + replaceAllUses(fn, load, p); + removeFromBlock(load); + stats.slot_loads_cse++; + changed = true; + folded = true; + break; + } + } + if (!folded) survivors.push(load); + } + } + }); + } + + return changed; +} diff --git a/lib/eir/devirt.ts b/lib/eir/devirt.ts new file mode 100644 index 00000000..4cba8526 --- /dev/null +++ b/lib/eir/devirt.ts @@ -0,0 +1,223 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// direct-call devirtualization beyond the self binding (compiler-P1). +// Lowering only marks direct calls for self-recursion; module +// functions call each other through their %self slots, and function +// expressions through their SSA closure values. When the CALLEE +// IDENTITY of a plain `call` is provable, the call skips closure +// dispatch (_ejs_invoke_closure) and calls the EIR function directly — +// same calling convention, argc/argv passed as before, so callee-side +// defaults/rest/arguments all still work. +// +// Two provable shapes: +// - SSA-visible: the callee operand IS a make_closure in the same +// function. The direct call's env operand is the closure's env. +// - stable-slot: the callee operand is a module_slot_load of a %self +// slot with exactly ONE static store in the module, whose stored +// value is a make_closure, and the load provably observes the +// store: either the store sits in the toplevel entry block with no +// CALL-effect instruction before it (no user code can run before +// the slot is written — cross-function safe, mirroring +// specialize.ts's prefix rule), or the store dominates the load in +// the same function. Cross-function sites can't carry the env +// value, so they additionally require the callee's %env param to +// be entirely unused (typical for module-level functions — their +// free names resolve through module slots, not the environment). +// +// What invoke_closure does that a direct call skips: the IS_FUNCTION +// check (statically true — the value is this closure) and the +// class-constructor TypeError. The latter is why any function whose +// closure might flow into set_constructor_kind_base/derived is +// declined; when that flow isn't enumerable (the marking intrinsic's +// operand is neither a make_closure nor a %self slot load), the pass +// declines the whole module (fail closed). +// +// Runs AFTER specialization (integrate.ts): a devirtualized site no +// longer uses its closure/slot-load as a plain-call callee, which +// would otherwise make specialize.ts's closed-world enumeration +// decline the strictly-better call_typed rewrite. + +import { Module, Func, Inst, Block } from "./ir"; +import { Effect, opInfo } from "./ops"; +import { computeRPO, computeDominators, dominates } from "./verifier"; + +export interface DevirtStats { + // call sites rewritten against an SSA-visible make_closure + ssa_sites: number; + // call sites rewritten through a stable %self slot + slot_sites: number; +} + +function comesBefore(idom: Map, a: Inst, b: Inst): boolean { + const ba = a.block!; + const bb = b.block!; + if (ba === bb) return ba.insts.indexOf(a) < bb.insts.indexOf(b); + return dominates(idom, ba, bb); +} + +export function devirtualizeModule(m: Module, toplevelName: string): DevirtStats { + const stats: DevirtStats = { ssa_sites: 0, slot_sites: 0 }; + if (process.env["EJS_NO_DEVIRT"]) return stats; + + const fnByName = new Map(); + for (const fn of m.functions) fnByName.set(fn.name, fn); + const toplevelFn = fnByName.get(toplevelName); + + // --- class-constructor suspects (fail closed) --------------------------- + // a devirtualized call to a class constructor would skip + // invoke_closure's TypeError; enumerate every closure the marking + // intrinsic could reach and decline those functions. + const ctorSuspect = new Set(); + const suspectSlots = new Set(); + let bailAll = false; + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.op !== "call_runtime") return; + const name = inst.imms["name"] as string; + if (typeof name !== "string" || name.indexOf("set_constructor_kind") !== 0) return; + const v = inst.operands[0]; + if (!v) return; + if (v.op === "make_closure") ctorSuspect.add(v.imms["fn"] as string); + else if (v.op === "module_slot_load" && v.imms["module"] === "%self") + suspectSlots.add(v.imms["slot"] as number); + else bailAll = true; + }); + } + if (bailAll) return stats; + + // --- %self slot stores -------------------------------------------------- + const selfStores = new Map(); + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.op !== "module_slot_store" || inst.imms["module"] !== "%self") return; + const slot = inst.imms["slot"] as number; + let l = selfStores.get(slot); + if (!l) selfStores.set(slot, (l = [])); + l.push({ fn, inst }); + }); + } + // anything stored to a ctor-marked slot is suspect too; a + // non-closure store to one means we can't enumerate — fail closed + suspectSlots.forEach((slot) => { + for (const s of selfStores.get(slot) || []) { + if (s.inst.operands[0]!.op === "make_closure") + ctorSuspect.add(s.inst.operands[0]!.imms["fn"] as string); + else bailAll = true; + } + }); + if (bailAll) return stats; + + // --- helpers ------------------------------------------------------------ + const envUnusedCache = new Map(); + const envUnused = (fn: Func): boolean => { + let r = envUnusedCache.get(fn); + if (r !== undefined) return r; + const envParam = fn.entry ? fn.entry.params[0] : undefined; + r = true; + if (envParam) { + fn.forEachInst((inst) => { + for (const o of inst.operands) if (o === envParam) r = false; + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) if (a === envParam) r = false; + }); + } + envUnusedCache.set(fn, r); + return r; + }; + + // the store sits in the toplevel entry with no CALL-effect + // instruction before it: no user code can observe the slot's + // pre-store state (except a textually-earlier load in that same + // entry block — the documented hoisting-lost read) + const prefixSafeCache = new Map(); + const prefixSafe = (store: Inst, storeFn: Func): boolean => { + let r = prefixSafeCache.get(store); + if (r !== undefined) return r; + r = false; + if (toplevelFn && storeFn === toplevelFn && store.block === toplevelFn.entry) { + r = true; + for (const inst of toplevelFn.entry!.insts) { + if (inst === store) break; + if ((opInfo(inst.op).effects & Effect.CALL) !== 0) { + r = false; + break; + } + } + } + prefixSafeCache.set(store, r); + return r; + }; + + const idoms = new Map>(); + const idomOf = (fn: Func): Map => { + let d = idoms.get(fn); + if (!d) { + const { rpo } = computeRPO(fn); + idoms.set(fn, (d = computeDominators(fn, rpo))); + } + return d; + }; + + // --- the rewrite -------------------------------------------------------- + // candidates first (rewriting inserts instructions, which must not + // happen under forEachInst's live iteration) + for (const fn of m.functions) { + const ssa: { call: Inst; closure: Inst; name: string }[] = []; + const slot: { call: Inst; name: string }[] = []; + fn.forEachInst((inst) => { + if (inst.op !== "call" || inst.imms["direct"]) return; + const callee = inst.operands[0]!; + + if (callee.op === "make_closure") { + const name = callee.imms["fn"] as string; + if (ctorSuspect.has(name) || !fnByName.has(name)) return; + ssa.push({ call: inst, closure: callee, name }); + return; + } + + if (callee.op === "module_slot_load" && callee.imms["module"] === "%self") { + const slotNum = callee.imms["slot"] as number; + const stores = selfStores.get(slotNum) || []; + if (stores.length !== 1) return; + const { fn: storeFn, inst: store } = stores[0]!; + const closure = store.operands[0]!; + if (closure.op !== "make_closure") return; + const name = closure.imms["fn"] as string; + const target = fnByName.get(name); + if (!target || ctorSuspect.has(name)) return; + if (!envUnused(target)) return; + // the load must provably observe the store + const load = callee; + let orderOk: boolean; + if (prefixSafe(store, storeFn)) { + orderOk = !( + load.block === store.block && + store.block!.insts.indexOf(load) < store.block!.insts.indexOf(store) + ); + } else { + orderOk = storeFn === fn && comesBefore(idomOf(fn), store, load); + } + if (!orderOk) return; + slot.push({ call: inst, name }); + } + }); + for (const c of ssa) { + c.call.imms["direct"] = c.name; + c.call.operands[0] = c.closure.operands[0]!; + stats.ssa_sites++; + } + for (const c of slot) { + const env = new Inst(fn, "const", [], { kind: "undefined" }); + const b = c.call.block!; + env.block = b; + b.insts.splice(b.insts.indexOf(c.call), 0, env); + c.call.imms["direct"] = c.name; + c.call.operands[0] = env; + stats.slot_sites++; + } + } + return stats; +} diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index d35638ba..9183a5d8 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -678,6 +678,18 @@ export class EIREmitter { return; } + case "typeof_is": { + // the single-tag test cleanup.ts rewrites + // `typeof x === "T"` into; boxed boolean result via the + // runtime's typeof_is_ entries + const t = String(inst.imms["type"]); + const callee = (rt as unknown as Record)[ + `typeof_is_${t}` + ]; + if (!callee) throw new Error(`EIR emit: no typeof_is runtime entry for '${t}'`); + return this.emitCallLike(inst, callee, [this.val(inst.operands[0])], "typeofis"); + } + // --- the typed low tier --------------------------- // has_tag/unbox/box mirror LLVMIRVisitor's NaN-boxing helpers; // the f64_* ops are plain LLVM float arithmetic. has_tag and diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 9ea0a6e0..2a44fa0a 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -32,7 +32,8 @@ import { Module } from "./ir"; import { FunctionBuilder } from "./builder"; import { verifyModule } from "./verifier"; import { injectLowTierProbes } from "./lowtier-probe"; -import { optimizeModule } from "./optimize"; +import { eliminateDeadInFunction, optimizeModule } from "./optimize"; +import { devirtualizeModule } from "./devirt"; import { sinkConstructResults } from "./sink-construct"; import { printModule } from "./printer"; import type * as e from "../estree"; @@ -469,7 +470,7 @@ export function collectEIRToplevel( // both), mirroring the EJS_NO_PROMOTE bisect hook let spec_stats: SpecStats | null = null; if (options.opt_level > 0 && !process.env["EJS_NO_EIR_OPT"]) { - const stats = optimizeModule(eir_module); + const stats = optimizeModule(eir_module, info.name); if ( stats.allocs_sunk || stats.reads_folded || @@ -485,7 +486,13 @@ export function collectEIRToplevel( stats.shape_allocs_sunk || stats.shape_guards_sunk || stats.args_sunk || - stats.flow_allocs_sunk + stats.flow_allocs_sunk || + stats.consts_folded || + stats.branches_folded || + stats.params_pruned || + stats.typeof_rewrites || + stats.lattice_arith || + stats.slot_loads_cse ) debug.log( 1, @@ -503,7 +510,13 @@ export function collectEIRToplevel( `${stats.shape_guards_sunk} shape guard branch(es) resolved, ` + `${stats.args_sunk} args object(s) sunk, ` + `${stats.flow_allocs_sunk} flow-sunk alloc(s) ` + - `(${stats.allocs_materialized} materialized)` + `(${stats.allocs_materialized} materialized), ` + + `${stats.consts_folded} const(s) folded, ` + + `${stats.branches_folded} branch(es) folded, ` + + `${stats.params_pruned} trivial param(s) pruned, ` + + `${stats.typeof_rewrites} typeof test(s) rewritten, ` + + `${stats.lattice_arith} lattice-typed op(s) lowered, ` + + `${stats.slot_loads_cse} slot load(s) CSE'd` ); verifyModule(eir_module); @@ -527,7 +540,7 @@ export function collectEIRToplevel( ); if (changed) { verifyModule(eir_module); - optimizeModule(eir_module); + optimizeModule(eir_module, info.name); verifyModule(eir_module); debug.log( 1, @@ -555,7 +568,7 @@ export function collectEIRToplevel( const n = sinkConstructResults(eir_module, promoted, info.name); if (n > 0) { verifyModule(eir_module); - optimizeModule(eir_module); + optimizeModule(eir_module, info.name); verifyModule(eir_module); typed_stats.ctor_sunk = n; debug.log( @@ -564,6 +577,27 @@ export function collectEIRToplevel( ); } } + + // direct-call devirtualization (devirt.ts). Runs LAST — a + // devirtualized site no longer uses its closure/slot-load as + // a plain-call callee, which would make specialize.ts's + // closed-world enumeration decline the strictly-better + // call_typed rewrite. EJS_NO_DEVIRT bisects (checked inside + // the pass). + { + const dstats = devirtualizeModule(eir_module, info.name); + if (dstats.ssa_sites || dstats.slot_sites) { + // sweep the closures/loads the rewrites just orphaned + for (const fn of eir_module.functions) eliminateDeadInFunction(fn); + verifyModule(eir_module); + debug.log( + 1, + `EIR-devirt: ${filename}: ` + + `${dstats.ssa_sites + dstats.slot_sites} call site(s) devirtualized ` + + `(${dstats.ssa_sites} ssa, ${dstats.slot_sites} slot)` + ); + } + } if (dumpOptRequested(options)) dumpModule(filename, "optimized", eir_module); } diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index 43807e70..eccaa3d4 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -31,6 +31,7 @@ import { threadBooleanJoins, } from "./optimize-guards"; import { sinkFlowAllocations } from "./sink-flow"; +import { cleanupFunction, computeStableSlots, cseModuleSlotLoads } from "./cleanup"; export interface OptStats { allocs_sunk: number; @@ -63,6 +64,13 @@ export interface OptStats { // object at their single escape site flow_allocs_sunk: number; allocs_materialized: number; + // cleanup passes (cleanup.ts, compiler-P1) + consts_folded: number; + branches_folded: number; + params_pruned: number; + typeof_rewrites: number; + lattice_arith: number; + slot_loads_cse: number; } function newStats(): OptStats { @@ -85,6 +93,12 @@ function newStats(): OptStats { args_sunk: 0, flow_allocs_sunk: 0, allocs_materialized: 0, + consts_folded: 0, + branches_folded: 0, + params_pruned: 0, + typeof_rewrites: 0, + lattice_arith: 0, + slot_loads_cse: 0, }; } @@ -493,6 +507,8 @@ export interface SinkFlags { noShaped: boolean; noArgs: boolean; noFlow: boolean; + noCse: boolean; + noCleanup: boolean; } function readSinkFlags(): SinkFlags { @@ -500,6 +516,8 @@ function readSinkFlags(): SinkFlags { noShaped: !!process.env["EJS_NO_SHAPED_SINK"], noArgs: !!process.env["EJS_NO_ARGS_SINK"], noFlow: !!process.env["EJS_NO_FLOW_SINK"], + noCse: !!process.env["EJS_NO_SLOT_CSE"], + noCleanup: !!process.env["EJS_NO_EIR_CLEANUP"], }; } @@ -958,7 +976,15 @@ function eliminateDead(fn: Func, stats: OptStats): boolean { // --- driver ------------------------------------------------------------------- -export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): OptStats { +export function optimizeFunction( + fn: Func, + module?: Module, + stats?: OptStats, + // the module's stable %self slots (computeStableSlots), for slot-load + // CSE. optimizeModule computes and threads this; standalone callers + // (tests) may omit it — CSE then runs block-local only. + stableSlots?: Set +): OptStats { const s = stats || newStats(); const flags = readSinkFlags(); // to fixpoint: inlining an IIFE exposes its env and literals; @@ -992,6 +1018,11 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O if (eliminateDead(fn, s)) changed = true; if (!changed || ++rounds > 10) break; } + // module-slot load CSE runs BEFORE the region passes: a toplevel + // receiver reloaded per access is a distinct SSA value per region, + // and receiver identity is exactly what lets adjacent shape regions + // merge (the shapes-P3 note). + if (!flags.noCse && cseModuleSlotLoads(fn, stableSlots, s)) eliminateDead(fn, s); // guard-region passes over the --types diamonds. They run // after the general fixpoint (env scalarization has exposed the SSA // values the diamonds guard) and bail immediately when lowering @@ -1020,11 +1051,28 @@ export function optimizeFunction(fn: Func, module?: Module, stats?: OptStats): O // or rewriting const unboxes earlier would refuse valid merges. if (foldUnboxOfBox(fn, s)) eliminateDead(fn, s); if (threadBooleanJoins(fn, s)) eliminateDead(fn, s); + // the compiler-P1 cleanup passes (cleanup.ts): constant folding, + // trivial params, to_boolean/typeof elimination, lattice-typed f64 + // lowering. They run LAST for the same reason foldUnboxOfBox does: + // folding arithmetic earlier would perturb the exact IR shapes the + // region matchers verify. + if (!flags.noCleanup && cleanupFunction(fn, s)) { + foldUnboxOfBox(fn, s); + eliminateDead(fn, s); + } return s; } -export function optimizeModule(m: Module): OptStats { +// exposed for the module-level passes (devirt.ts) that delete uses and +// want their dead operands swept without a full optimizer run +export function eliminateDeadInFunction(fn: Func, stats?: OptStats): boolean { + return eliminateDead(fn, stats || newStats()); +} + +export function optimizeModule(m: Module, toplevelName?: string): OptStats { const stats = newStats(); - for (const fn of m.functions) optimizeFunction(fn, m, stats); + const stableSlots = + toplevelName !== undefined ? computeStableSlots(m.functions, toplevelName) : undefined; + for (const fn of m.functions) optimizeFunction(fn, m, stats, stableSlots); return stats; } diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index d16febcc..a895b171 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -13,6 +13,7 @@ import { verifyFunction, verifyModule } from "./verifier"; import { lowerFunctionNode, lowerProgram, lowerAnalyzedFunction } from "./lower"; import { optimizeFunction, optimizeModule } from "./optimize"; import type { OptStats } from "./optimize"; +import { devirtualizeModule } from "./devirt"; import { specializeModule } from "./specialize"; import { ScopeAnalysis } from "./scopes"; import { isLowerNotSupported } from "./errors"; @@ -1358,8 +1359,12 @@ test("guard-merge: hypot2 becomes one guard region with one slow path", () => { assert(countOps(fn, "has_tag") === 2, `has_tag = ${countOps(fn, "has_tag")}`); const ft = guardFalseTargets(fn); assert(ft.size === 1, `guard-failure targets = ${ft.size}`); - // the full generic computation survives on the (single) slow path - assert(countOps(fn, "mul") === 2 && countOps(fn, "add") === 1, "generic ops must survive"); + // the generic muls survive on the (single) slow path; the slow add + // is lattice-lowered afterwards (mul results are proven numbers — + // cleanup.ts), so the ToNumber/throw behavior the slow path owes is + // exactly the muls' + assert(countOps(fn, "mul") === 2, "generic muls must survive"); + assert(countOps(fn, "add") === 0, `slow add lowers to f64, saw ${countOps(fn, "add")}`); }); test("guard-merge: merged fast region is unboxed end-to-end, boxing once", () => { @@ -1367,9 +1372,11 @@ test("guard-merge: merged fast region is unboxed end-to-end, boxing once", () => "function hypot2(a, b) { return a * a + b * b; }", numericStubOracle(["a", "b"]) ); - // exactly one box at the region exit; only the region INPUTS unbox - assert(countOps(fn, "box_f64") === 1, `box_f64 = ${countOps(fn, "box_f64")}`); - assert(countOps(fn, "unbox_f64") === 4, `unbox_f64 = ${countOps(fn, "unbox_f64")}`); + // one box at the region exit, one more where cleanup.ts lowers the + // slow path's add over the (proven-number) mul results; the region + // INPUTS unbox on the fast side, the mul results on the slow side + assert(countOps(fn, "box_f64") === 2, `box_f64 = ${countOps(fn, "box_f64")}`); + assert(countOps(fn, "unbox_f64") === 6, `unbox_f64 = ${countOps(fn, "unbox_f64")}`); // intermediate joins carry raw f64 params (the optimizer-scoped lift // of the P2 boxed-edges rule), all marked for the verifier let rawParams = 0; @@ -2413,6 +2420,12 @@ function shapeOptStats(): OptStats { args_sunk: 0, flow_allocs_sunk: 0, allocs_materialized: 0, + consts_folded: 0, + branches_folded: 0, + params_pruned: 0, + typeof_rewrites: 0, + lattice_arith: 0, + slot_loads_cse: 0, }; } @@ -3479,6 +3492,334 @@ test("sink-ctor: EJS_NO_CTOR_SINK leaves the construct alone", () => { } }); +// --- cleanup (compiler-P1): const folding, lattice, CSE, devirt ----------------- + +function optStatsOf(src: string): { fn: Func; printed: string; stats: OptStats } { + let { fn } = lowerOne(src); + const stats = optimizeFunction(fn); + verifyFunction(fn); + return { fn, printed: printFunction(fn), stats }; +} + +test("cleanup: numeric constant arithmetic folds", () => { + const { fn, stats } = optStatsOf("function f() { return 2 * 3 + 4; }"); + let ret: Inst | null = null; + fn.forEachInst((i) => { + if (i.op === "return") ret = i; + }); + assert(ret!.operands[0]!.op === "const", "return operand is a const"); + assert(ret!.operands[0]!.imms.value === 10, "2*3+4 folds to 10"); + assert(stats.consts_folded >= 2, `consts_folded=${stats.consts_folded}`); +}); + +test("cleanup: string concat folds only for string operands", () => { + const { fn } = optStatsOf('function f() { return "a" + "b"; }'); + let ret: Inst | null = null; + fn.forEachInst((i) => { + if (i.op === "return") ret = i; + }); + assert(ret!.operands[0]!.op === "const", "atom+atom folds"); + assert(ret!.operands[0]!.imms.value === "ab", "concat result"); + // number-to-string formatting is the runtime's business: no fold + const { printed } = optStatsOf('function f() { return "a" + 1; }'); + assertContains(printed, " = add "); +}); + +test("cleanup: typeof x === 'T' becomes typeof_is", () => { + const { printed, stats } = optStatsOf('function f(x) { return typeof x === "number"; }'); + assertContains(printed, "typeof_is"); + assertNotContains(printed, "strict_eq"); + assertNotContains(printed, " = typeof "); // dead typeof swept + assert(stats.typeof_rewrites === 1, `typeof_rewrites=${stats.typeof_rewrites}`); +}); + +test("cleanup: typeof of a lattice-known value folds to its tag", () => { + const { fn } = optStatsOf("function f() { return typeof 1; }"); + let ret: Inst | null = null; + fn.forEachInst((i) => { + if (i.op === "return") ret = i; + }); + assert(ret!.operands[0]!.imms.value === "number", "typeof 1 is 'number'"); + const o = optStatsOf("function f() { return typeof {}; }"); + let ret2: Inst | null = null; + o.fn.forEachInst((i) => { + if (i.op === "return") ret2 = i; + }); + assert(ret2!.operands[0]!.imms.value === "object", "typeof {} is 'object'"); +}); + +test("cleanup: if (!x) inverts the branch instead of calling not", () => { + const { printed, stats } = optStatsOf("function f(x) { if (!x) return 1; return 2; }"); + assertNotContains(printed, "logical_not"); + assert(stats.branches_folded >= 1, `branches_folded=${stats.branches_folded}`); +}); + +test("cleanup: known-truthiness conditions fold the branch", () => { + const { printed } = optStatsOf("function f() { if (null) return 1; return 2; }"); + assertNotContains(printed, "cond_br"); + const o = optStatsOf("function f() { if ({}) return 1; return 2; }"); + assertNotContains(o.printed, "cond_br"); + let ret: Inst | null = null; + o.fn.forEachInst((i) => { + if (i.op === "return" && ret === null) ret = i; + }); + assert(ret!.operands[0]!.imms.value === 1, "object condition is truthy"); +}); + +test("cleanup: lattice-proven number arithmetic lowers to f64 with no guard", () => { + // a*1 and b*1 are numbers by the mul result rule; the outer add + // then computes unboxed — with no oracle and no has_tag anywhere + const { printed, stats } = optStatsOf("function f(a, b) { return (a * 1) + (b * 1); }"); + assertContains(printed, "f64_add"); + assertNotContains(printed, "has_tag"); + assert(stats.lattice_arith >= 1, `lattice_arith=${stats.lattice_arith}`); +}); + +test("cleanup: unary_plus on a proven number is the identity", () => { + const { printed } = optStatsOf("function f(a) { return +(a * 1); }"); + assertNotContains(printed, "unary_plus"); +}); + +test("cleanup: proven-number compare feeds cond_br through f64_lt", () => { + const { printed } = optStatsOf( + "function f(a, b) { if (a * 1 < b * 1) return 1; return 2; }" + ); + assertContains(printed, "f64_lt"); + assertNotContains(printed, " = lt "); + assertNotContains(printed, "to_boolean"); +}); + +test("cleanup: trivial block params prune to their single value", () => { + const fb = new FunctionBuilder("f", ["%env", "%this"]); + const env = fb.fn.entry!.params[0]!; + const v = fb.constNumber(7); + const cond = fb.emit("to_boolean", [env], {}); + const a = fb.newBlock("a"); + const b = fb.newBlock("b"); + const j = fb.newBlock("join"); + const p = j.addParam("t"); + fb.condBr(cond, a, [], b, []); + fb.sealBlock(a); + fb.sealBlock(b); + fb.setInsertPoint(a); + fb.br(j, [v]); + fb.setInsertPoint(b); + fb.br(j, [v]); + fb.sealBlock(j); + fb.setInsertPoint(j); + fb.ret(p); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + assert(stats.params_pruned === 1, `params_pruned=${stats.params_pruned}`); + let ret: Inst | null = null; + fn.forEachInst((i) => { + if (i.op === "return") ret = i; + }); + assert(ret!.operands[0] === v, "return sees the value directly"); +}); + +test("cleanup: EJS_NO_EIR_CLEANUP leaves the residue alone", () => { + process.env["EJS_NO_EIR_CLEANUP"] = "1"; + try { + const { printed, stats } = optStatsOf("function f() { return 2 * 3 + 4; }"); + assertContains(printed, " = mul "); + assert(stats.consts_folded === 0, `consts_folded=${stats.consts_folded}`); + } finally { + delete process.env["EJS_NO_EIR_CLEANUP"]; + } +}); + +// --- module-slot load CSE ------------------------------------------------------- + +test("slot-cse: same-block reloads fold; a call kills availability", () => { + const fb = new FunctionBuilder("g", ["%env", "%this"]); + const l1 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + const l2 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + const sum1 = fb.emit("add", [l1, l2], {}); + fb.emit("call", [sum1, fb.constUndefined()], {}); + const l3 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + fb.ret(fb.emit("add", [sum1, l3], {})); + const fn = fb.finish(); + verifyFunction(fn); + const stats = optimizeFunction(fn); + verifyFunction(fn); + // l2 folds to l1; l3 survives the CALL kill + assert(stats.slot_loads_cse === 1, `slot_loads_cse=${stats.slot_loads_cse}`); + let loads = 0; + fn.forEachInst((i) => { + if (i.op === "module_slot_load") loads++; + }); + assert(loads === 2, `loads=${loads}`); +}); + +test("slot-cse: a stable slot's loads fold across calls and blocks", () => { + // toplevel: store the slot once in entry, read it on both sides of + // a call and across a diamond — every post-store load folds to the + // stored value + const mod = new Module("cse_mod"); + const fb = new FunctionBuilder("toplevel", ["%env", "%this"]); + const obj = fb.emit("make_object", [], { keys: [] }); + fb.emit("module_slot_store", [obj], { module: "%self", slot: 0 }); + const l1 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + fb.emit("call", [l1, fb.constUndefined()], {}); + const t = fb.newBlock("t"); + const f = fb.newBlock("f"); + const j = fb.newBlock("j"); + const cond = fb.emit("to_boolean", [fb.fn.entry!.params[0]!], {}); + fb.condBr(cond, t, [], f, []); + fb.sealBlock(t); + fb.sealBlock(f); + fb.setInsertPoint(t); + fb.br(j, []); + fb.setInsertPoint(f); + fb.br(j, []); + fb.sealBlock(j); + fb.setInsertPoint(j); + const l2 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + fb.ret(l2); + mod.addFunction(fb.finish()); + verifyModule(mod); + const stats = optimizeModule(mod, "toplevel"); + verifyModule(mod); + assert(stats.slot_loads_cse >= 2, `slot_loads_cse=${stats.slot_loads_cse}`); + let loads = 0; + mod.functions[0]!.forEachInst((i) => { + if (i.op === "module_slot_load") loads++; + }); + assert(loads === 0, `loads=${loads}`); +}); + +test("slot-cse: a suspendable function declines the stable exemptions", () => { + // a generator body (post-desugar: generator_yield runtime calls) + // can see the toplevel's remaining stores run mid-suspension — its + // loads must reload even for stable slots + const mod = new Module("cse_gen_mod"); + const fb = new FunctionBuilder("toplevel", ["%env", "%this"]); + const obj = fb.emit("make_object", [], { keys: [] }); + fb.emit("module_slot_store", [obj], { module: "%self", slot: 0 }); + fb.ret(fb.constUndefined()); + mod.addFunction(fb.finish()); + const gb = new FunctionBuilder("gen_body", ["%env", "%this"]); + const l1 = gb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + gb.emit("call_runtime", [l1], { name: "generator_yield" }); + const l2 = gb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + gb.ret(l2); + mod.addFunction(gb.finish()); + verifyModule(mod); + const stats = optimizeModule(mod, "toplevel"); + verifyModule(mod); + assert(stats.slot_loads_cse === 0, `slot_loads_cse=${stats.slot_loads_cse}`); + let loads = 0; + mod.functions[1]!.forEachInst((i) => { + if (i.op === "module_slot_load") loads++; + }); + assert(loads === 2, `loads=${loads}`); +}); + +test("slot-cse: a second store (an accessor setter) breaks stability", () => { + const mod = new Module("cse_mod2"); + const fb = new FunctionBuilder("toplevel", ["%env", "%this"]); + const obj = fb.emit("make_object", [], { keys: [] }); + fb.emit("module_slot_store", [obj], { module: "%self", slot: 0 }); + const l1 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + fb.emit("call", [l1, fb.constUndefined()], {}); + const l2 = fb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + fb.ret(l2); + mod.addFunction(fb.finish()); + const sb = new FunctionBuilder("set_export_x", ["%env", "%this", "value"]); + sb.emit("module_slot_store", [sb.readVariable("value", sb.cur)], { + module: "%self", + slot: 0, + }); + sb.ret(sb.constUndefined()); + mod.addFunction(sb.finish()); + verifyModule(mod); + const stats = optimizeModule(mod, "toplevel"); + verifyModule(mod); + // the load after the CALL must reload (the setter may have run) + assert(stats.slot_loads_cse === 1, `slot_loads_cse=${stats.slot_loads_cse}`); +}); + +// --- devirtualization ----------------------------------------------------------- + +function buildDevirtModule(opts: { ctorMark?: boolean; envUse?: boolean }): { + mod: Module; + ssaCall: Inst; + slotCall: Inst; +} { + const mod = new Module("devirt_mod"); + + // the callee: returns 1; optionally touches its env + const hb = new FunctionBuilder("helper", ["%env", "%this"]); + if (opts.envUse) hb.emit("env_load", [hb.fn.entry!.params[0]!], { slot: 0 }); + hb.ret(hb.constNumber(1)); + mod.addFunction(hb.finish()); + + // toplevel: closure minted, stored to %self slot 0, called via SSA + const fb = new FunctionBuilder("toplevel", ["%env", "%this"]); + const env = fb.constUndefined(); + const clo = fb.emit("make_closure", [env], { fn: "helper", name: "helper" }); + fb.emit("module_slot_store", [clo], { module: "%self", slot: 0 }); + if (opts.ctorMark) fb.emit("call_runtime", [clo], { name: "set_constructor_kind_base" }); + const ssaCall = fb.emit("call", [clo, fb.constUndefined()], {}); + fb.ret(ssaCall); + mod.addFunction(fb.finish()); + + // another function calls through the slot + const gb = new FunctionBuilder("user", ["%env", "%this"]); + const load = gb.emit("module_slot_load", [], { module: "%self", slot: 0 }); + const slotCall = gb.emit("call", [load, gb.constUndefined()], {}); + gb.ret(slotCall); + mod.addFunction(gb.finish()); + + verifyModule(mod); + return { mod, ssaCall, slotCall }; +} + +test("devirt: SSA-visible and stable-slot call sites go direct", () => { + const { mod, ssaCall, slotCall } = buildDevirtModule({}); + const stats = devirtualizeModule(mod, "toplevel"); + verifyModule(mod); + assert(stats.ssa_sites === 1, `ssa_sites=${stats.ssa_sites}`); + assert(stats.slot_sites === 1, `slot_sites=${stats.slot_sites}`); + assert(ssaCall.imms.direct === "helper", "ssa site direct"); + assert(slotCall.imms.direct === "helper", "slot site direct"); + assert(slotCall.operands[0]!.op === "const", "slot site env is undefined const"); +}); + +test("devirt: a constructor-kind-marked closure declines", () => { + const { mod, ssaCall, slotCall } = buildDevirtModule({ ctorMark: true }); + const stats = devirtualizeModule(mod, "toplevel"); + verifyModule(mod); + assert(stats.ssa_sites === 0 && stats.slot_sites === 0, "no sites rewritten"); + assert(!ssaCall.imms.direct && !slotCall.imms.direct, "calls stay generic"); +}); + +test("devirt: an env-using callee declines the cross-function slot site", () => { + const { mod, ssaCall, slotCall } = buildDevirtModule({ envUse: true }); + const stats = devirtualizeModule(mod, "toplevel"); + verifyModule(mod); + // SSA site still fine (the env value is right there); slot site + // can't supply the env cross-function + assert(stats.ssa_sites === 1, `ssa_sites=${stats.ssa_sites}`); + assert(stats.slot_sites === 0, `slot_sites=${stats.slot_sites}`); + assert(ssaCall.imms.direct === "helper" && !slotCall.imms.direct, "only the ssa site"); +}); + +test("devirt: EJS_NO_DEVIRT leaves every site generic", () => { + process.env["EJS_NO_DEVIRT"] = "1"; + try { + const { mod, ssaCall } = buildDevirtModule({}); + const stats = devirtualizeModule(mod, "toplevel"); + assert(stats.ssa_sites === 0 && stats.slot_sites === 0, "disabled"); + assert(!ssaCall.imms.direct, "call stays generic"); + } finally { + delete process.env["EJS_NO_DEVIRT"]; + } +}); + // -------------------------------------------------------------------------------- if (failures > 0) { diff --git a/runtime/ejs-map.c b/runtime/ejs-map.c index 0c0cbbef..5d0fac2b 100644 --- a/runtime/ejs-map.c +++ b/runtime/ejs-map.c @@ -64,14 +64,25 @@ _ejs_map_delete (ejsval map, ejsval key) // our caller should have already validated and thrown appropriate TypeErrors EJS_ASSERT(EJSVAL_IS_MAP(map)); + EJSMap* _map = EJSVAL_TO_MAP(map); + // 4. Let entries be the List that is the value of M’s [[MapData]] internal slot. + EJSKeyValueEntry* entries = _map->head_insert; + // 5. Repeat for each Record {[[key]], [[value]]} p that is an element of entries, - // a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, then - // i. Set p.[[key]] to empty. - // ii. Set p.[[value]] to empty. - // iii. Return true. - // 6. Return false. + for (EJSKeyValueEntry* p = entries; p; p = p->next_insert) { + // a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, then + if (!EJSVAL_IS_NO_ITER_VALUE_MAGIC(p->key) && SameValueZero (p->key, key)) { + // i. Set p.[[key]] to empty. + p->key = MAGIC_TO_EJSVAL_IMPL(EJS_NO_ITER_VALUE); + // ii. Set p.[[value]] to empty. + p->value = MAGIC_TO_EJSVAL_IMPL(EJS_NO_ITER_VALUE); + // iii. Return true. + return _ejs_true; + } + } + // 6. Return false. return _ejs_false; } diff --git a/test/expected/map6.js.expected-out b/test/expected/map6.js.expected-out new file mode 100644 index 00000000..eb11eb18 --- /dev/null +++ b/test/expected/map6.js.expected-out @@ -0,0 +1,9 @@ +true +false +2 +false +undefined +a=1,c=3 +3 +9 +a,c,b diff --git a/test/map6.js b/test/map6.js new file mode 100644 index 00000000..1fbf574f --- /dev/null +++ b/test/map6.js @@ -0,0 +1,31 @@ +// Map.prototype.delete: was an unimplemented runtime stub (returned +// false, removed nothing) until the optimizer's slot-load CSE became +// its first compiler-side caller. Pins removal, size, has, get, +// iteration skipping, the return value, and re-adding after delete. + +var m = new Map(); +m.set("a", 1); +m.set("b", 2); +m.set("c", 3); + +console.log(m.delete("b")); +console.log(m.delete("nope")); +console.log(m.size); +console.log(m.has("b")); +console.log(m.get("b")); + +var keys = []; +m.forEach(function (v, k) { + keys.push(k + "=" + v); +}); +console.log(keys.join(",")); + +m.set("b", 9); +console.log(m.size); +console.log(m.get("b")); + +var it = m.keys(); +var r; +var order = []; +while (!(r = it.next()).done) order.push(r.value); +console.log(order.join(",")); From 8e92342d796d4248b7c6a475b0e9a24a08347757 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 22:03:15 -0700 Subject: [PATCH 122/146] docs: compiler-P5 pass-configuration ergonomics phase; P7.5 in the spine MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -O suites + -f/-fno- per-pass flags replace the EJS_* env-var surface (env reverts to debugging-only); pass registry, migration path, and open questions recorded in compiler-plan.md. Planned only — no implementation. Co-Authored-By: Claude Fable 5 --- docs/compiler-plan.md | 46 ++++++++++++++++++++++++++++++++++++++++++- docs/plans.md | 8 ++++++-- 2 files changed, 51 insertions(+), 3 deletions(-) diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md index 06103241..f1ae349b 100644 --- a/docs/compiler-plan.md +++ b/docs/compiler-plan.md @@ -1,4 +1,4 @@ -# compiler-plan: the EIR middle-end, optimizer residue, and the TypeScript port +# compiler-plan: the EIR middle-end, optimizer residue, the TypeScript port, and driver ergonomics Bucket plan; the ordering spine lives in `docs/plans.md` (milestone references look like `compiler-P1`). Content moved here from the old @@ -117,3 +117,47 @@ shaped-world continuation), shape-guard regions (see shapes-plan). - IR in the manifest: serialize the module's EIR so cross-module analysis and inlining through module boundaries work before — and instead of — any dynamic-loading story. +- [ ] **compiler-P5 — Pass-configuration ergonomics: -O suites and + -f/-fno- flags.** Env vars stop being the stable interface for + configuring the optimizer; a gcc/clang-style flag surface + replaces them, and env reverts to what it should be — a + short-lived debugging channel. Current state: `-O0`..`-O3` + exist in the driver but only select the LLVM `default` + pipeline plus one coarse `opt_level > 0` gate on the whole EIR + optimizer; the real per-pass surface is ~20 `EJS_*` vars — the + `EJS_NO_*` bisect family (EIR_CLEANUP, SLOT_CSE, DEVIRT, + EIR_SPEC, SHAPE_GUARDS, POLY_SHAPE_GUARDS, BORN_SHAPED, + SHAPE_FUSION, the `*_SINK` family, PROMOTE, INLINE_ALLOC, + INLINE_ENV_SLOTS, GC_FRAMES), positive opt-ins + (`EJS_EIR_LOWTIER`), and tuning knobs (`EJS_SHAPE_FIELD_CAP_MAX`, + `EJS_SHAPE_NOMATCH`). The shape: + - **pass registry**: one table mapping canonical pass name → + `CompilerOptions` field → default at each -O level; passes + read options, never `process.env` (the per-run flag snapshot + in `lib/eir/optimize.ts` generalizes into this). `--help` + and a `--print-passes` "effective configuration" listing are + generated from the registry so it can't drift. + - **-O suites**: `-O0` = straight lowering (no EIR optimizer, + LLVM O0); `-O1` = the cheap always-sound tier (cleanup + fixpoint, slot CSE, ...); `-O2` = today's full default. + Decide whether `-O3` means anything yet or folds into `-O2`, + and whether the EIR suite and the LLVM opt level stay one + knob (probably yes, with an escape hatch for the LLVM side). + - **-f\ / -fno-\** per-pass overrides, applied + after the suite in command-line order, last-wins — gcc + semantics. Tuning knobs become `-f=`. + - **migration**: each `EJS_NO_X` maps 1:1 to a `-fno-x`; A/B + gate that the old env spelling ≡ the new flag spelling, port + `lib/eir/tests.ts` and the CI lanes off `process.env` + mutation, then delete the env reads from the passes. A + single generic escape (`EJS_FLAGS=` injected as extra argv) + can remain for bisecting inside harnesses that don't thread + driver flags. + - **open questions**: whether `--types` folds in as `-fmaam` + (and eventually defaults on at `-O2`) or stays a separate + probe flag; runtime-behavior knobs (`EJS_GC_*` etc.) are + explicitly out of scope — they configure the produced + binary's runtime, not the compile. + Gates: bootstrap matrix green, stage identity, and the + env≡flag A/B before the env reads are deleted. Independent of + compiler-P2..P4; can land any time. diff --git a/docs/plans.md b/docs/plans.md index 4c2b7ae6..8aed9b15 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -103,8 +103,8 @@ gc-plan.md, shapes-plan.md (Step B). ## P7 — Robustness -The correctness debts, paid down. Detail: runtime-plan.md, -compiler-plan.md. +The correctness and ergonomics debts, paid down. Detail: +runtime-plan.md, compiler-plan.md. - [ ] **P7.1** pinned runtime-bug burn-down (runtime-P1). - [ ] **P7.2** export-boundary wrapper: specialization across escaping @@ -113,6 +113,10 @@ compiler-plan.md. format (runtime-P3). - [ ] **P7.4** finish the TypeScript port of the compiler; babel step becomes tsc (compiler-P2). +- [ ] **P7.5** clang-style pass configuration: -O suites define the + optimizer tiers, -f/-fno- per-pass flags replace the EJS_* env + vars, which revert to debugging-only (compiler-P5; independent, + can land any time). ## P8 — Language modernization From acd3ccdbb551fb619a41c915095e135f3888df1c Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 22:03:38 -0700 Subject: [PATCH 123/146] =?UTF-8?q?eir:=20gc-P5=20(P6.2)=20part=201=20?= =?UTF-8?q?=E2=80=94=20single-cell=20shaped=20objects:=20embedded=20slots,?= =?UTF-8?q?=20object-owner=20barrier,=20per-shape=20trace=20masks?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Step B core, with the design addendum in gc-plan.md. Shaped slot storage stays a closureenv-shaped region behind the obj->slots ejsval, but born-with-shape allocation now places it INSIDE the object's own cell (32B object + 16B embedded env header + slots, one GC cell) — compiled slot addressing, has_shape guards, and the verifier contract are untouched; embedded-ness is pointer identity, no new header bit. - _ejs_object_new_shaped derives the true shape FIRST (pure, memo'd), then births object + storage as one cell; off-script falls back to the old two-cell / sequential path byte-for-byte. - Constructor results get there via a birth-capacity hint on EJSFunction (one-shot feedback: first construct's field count sizes every later 'this'); works flag-off, no compiler plumbing. - Barrier owner flip: shaped-slot stores remember the wrapper OBJECT (C sites + emitted slot_store); the ordinary Scan walks slot values directly in both modes (embedded storage has no cell of its own), scanning the env edge only when out-of-line. Owners are always cell heads — no interior-pointer remset entries. - Evacuation: the embedded slots ejsval joins minor_fixup_evacuated's self-interior-pointer cases (flat strings, EJSArguments) and is never presented to the precise slot callbacks. - Per-shape trace masks: EJSShape grows f64_mask (built incrementally at intern); the shaped Scan skips f64 slots — precise trace elision. (Emitted f64 slot_store already skipped the barrier; the runtime filter self-elides on numbers.) - Embeds cap at 10 fields (EJS_SHAPE_EMBED_FIELD_MAX) until the 256-byte size class is enabled — 11..14-field cells would round to 256 and take today's LOS routing. Measured: types-bench2 flag-off 2.50->2.37s, object+env cell count halved (8M->4M), requested bytes 305->244MB; --types bench2 is 0.21s on BOTH baseline and this change — the ctor-sinking phases already virtualized the alloc loop, so gc-P5's payoff is flag-off code, self-compile, and footprint. Self-compile (stage2 action) 60.4s vs gc-P4's recorded 62-64s. Gates: matrix x7 green (test-eir, lowtier, stage0-3 incl. byte-identity, shapes-off); embedded-slot stress probe (growth past capacity, ctor hints, dict migration out of embedded, repr flips, old->young slot traffic, enumeration) node-identical under EJS_GC_EVERY_N_ALLOC=7/31/101, PARANOID, NURSERY=off, SHAPES=off; typed-slots/bornshape/poly probes green under the same matrix. Co-Authored-By: Claude Fable 5 --- docs/gc-plan.md | 59 +++++++++++++++++++++++ lib/eir/emit.ts | 10 ++-- runtime/ejs-function.c | 22 ++++++++- runtime/ejs-function.h | 8 ++++ runtime/ejs-gc.c | 14 ++++++ runtime/ejs-object.c | 104 +++++++++++++++++++++++++++++++++++++---- runtime/ejs-object.h | 6 +++ runtime/ejs-shapes.c | 5 ++ runtime/ejs-shapes.h | 12 +++++ 9 files changed, 225 insertions(+), 15 deletions(-) diff --git a/docs/gc-plan.md b/docs/gc-plan.md index 04251ca0..a11786d1 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -541,6 +541,65 @@ through Phase 3 for A/B and differential testing. maam-plan; the GC-side work is deliberately small because P1 reserved the header bits. + **Settled design (2026-07-28, the Step B addendum).** The governing + choice: shaped slot storage stays a *closureenv-shaped* region reached + through the `obj->slots` ejsval — but born-with-shape allocation places + it **inside the object's own cell** (object header, ops, proto, slots + ejsval pointing at `obj+32`, then an embedded env header + the slot + values). Embedded-ness is pointer identity (`env == (char*)obj + + sizeof(EJSObject)`), no new header bit. Because the compiled + slot-addressing seam (`slotRef`, emit.ts) already loads the slots + ejsval and indexes the env, **compiled slot access, has_shape guards, + and the verifier's contract change not at all**; only allocation sites + and the collector know. Consequences, each independently gated: + - **Single-cell shaped allocation**: `_ejs_object_new_shaped` grows a + shape-index-passing form (trusting the module's interned shape, + values verified against the f64 mask, fallback = today's + re-derivation); one cell of `32 + 16 + 8n` bytes replaces the + object-cell + env-cell pair. Constructor allocations get there via + a **birth-capacity hint on EJSFunction** (set from the result's + field count after the first construct; ordinary Construct allocates + `this` with embedded capacity = hint) — no compiler plumbing, works + flag-off. Growth past embedded capacity falls back to an + out-of-line closureenv (today's doubling path); the object stays + shaped, the embedded region goes dead. + - **Barrier owner flip**: shaped-slot stores remember the *wrapper + object* (C sites and emitted slot_store both; today they remember + the env), and the ordinary object's Scan walks the slot *values* + directly in both modes (plus the env edge only when out-of-line). + This makes owner pointers always cell heads — no interior-pointer + remset entries — and dirty-object rescans see embedded slots. + - **Evacuation**: whole-cell memcpy (the existing routine) + a shaped + case in `minor_fixup_evacuated`'s self-interior-pointer fixup (the + flat-string/EJSArguments precedent): rebase the slots ejsval when + it points into the moved cell. The embedded slots edge is never + presented to the precise slot callbacks (they assume object-base + payloads); Scan's mode switch owns that. + - **Per-shape trace masks**: the shape record gains an f64 bitmap + (u16, built incrementally at intern time from parent | repr); the + ordinary-object walk skips f64 slots — precise trace elision — and + the three hot collector sites (mark, minor trace, compact fixup) + may short-circuit `ops->Scan` for `_ejs_Object_specops` objects + into the same inline walk. Out-of-line arrays keep the closureenv + range scan (raw doubles are NaN-box-valid numbers; unchanged). + - **The 256-byte size class is enabled**: `ffs(256)=9 > + OBJECT_SIZE_HIGH_LIMIT_BITS` routes 256B cells to the LOS today — + an off-by-one that predates gc-P4's LOS lookup fix and the direct + arena map. Enabling the already-plumbed class (pagelist, seam + words, emitter cap all exist) makes every cap-14 shaped object + single-cell (`32+16+112 = 160 ≤ 256`) and takes >14-slot envs off + the LOS; A/B-measured at the gate (frag bench + self-compile). + - **Emitter inline allocation for `make_object_shaped`** (literals): + the make_env bump-sequence precedent, one guard (module shape + global != NOMATCH — literal installs are CreateDataProperty, so no + epoch/proto check is needed), header stamped with the shape index, + initializing stores, no barriers. Inline `fill_object_shaped` is + measured-later work (the ctor hint already single-cells it). + - **Typed-slot barrier elision is already true** (emitted f64 + slot_store skips the barrier; the runtime filter exits on + non-traceable values) — the phase audits and documents it; the new + elision is the trace mask above. + - **gc-P6 — Concurrent marking + STW survivor evacuation.** Collector thread, single-mutator handshake, SATB log becomes live. **Gate: marking off the mutator; STW time independent of live-set size; stress-differential diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 9183a5d8..179b704a 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -155,7 +155,6 @@ export class EIREmitter { // the slot-array env loaded by the most recent slotRef — // shaped stores must remember the ENV (the storage owner), not the // object whose Scan only holds the env reference - last_slots_val: llvm.Value | null = null; scratch_type: llvm.Type | null = null; this_slot!: llvm.AllocaInst; // values live across a safepoint are DEMOTED to @@ -539,7 +538,6 @@ export class EIREmitter { "slots_ejsval_ptr" ); const slotsval = ir.createLoad(types.EjsValue, slots_ptr, "slots_ejsval"); - this.last_slots_val = slotsval; // the barrier's true owner // payload-mask the closureenv ejsval to its EJSClosureEnv* const envptr = ir.createPointerCast( this.v.objectPointer(slotsval), @@ -762,14 +760,18 @@ export class EIREmitter { return; } case "slot_store": { - const ref = this.slotRef(this.val(inst.operands[0]), inst.imms["slot"] as number); + const objval = this.val(inst.operands[0]); + const ref = this.slotRef(objval, inst.imms["slot"] as number); if (inst.imms["repr"] === "f64") { // raw doubles are not references: no barrier const dref = ir.createBitCast(ref, types.Double.pointerTo(), "slot_f64_ptr"); ir.createStore(this.val(inst.operands[1]), dref); } else { ir.createStore(this.val(inst.operands[1]), ref); - this.emitStoreBarrier(this.last_slots_val!, this.val(inst.operands[1])); + // the barrier owner is the wrapper OBJECT (gc-P5): + // its Scan walks the slot values directly, and + // embedded storage is not a cell of its own + this.emitStoreBarrier(objval, this.val(inst.operands[1])); } this.values.set(inst, this.val(inst.operands[1])); return; diff --git a/runtime/ejs-function.c b/runtime/ejs-function.c index f35ccac5..478e5af7 100644 --- a/runtime/ejs-function.c +++ b/runtime/ejs-function.c @@ -9,6 +9,7 @@ #include "ejs-value.h" #include "ejs-ops.h" #include "ejs-object.h" +#include "ejs-shapes.h" #include "ejs-function.h" #include "ejs-proxy.h" #include "ejs-array.h" @@ -548,7 +549,12 @@ _ejs_function_specop_construct (ejsval F, ejsval newTarget, uint32_t argc, ejsva if (kind == CONSTRUCTOR_KIND_BASE) { // a. Let thisArgument be OrdinaryCreateFromConstructor(newTarget, "%ObjectPrototype%"). // b. ReturnIfAbrupt(thisArgument). - thisArgument = OrdinaryCreateFromConstructor(newTarget, _ejs_Object_prototype, &_ejs_Object_specops); + // gc-P5: the birth-capacity hint pre-sizes `this` so the + // constructor's slot fills stay in the object's own cell + // (single-cell allocation); semantics are unchanged from + // OrdinaryCreateFromConstructor with _ejs_Object_specops. + ejsval proto = GetPrototypeFromConstructor(newTarget, _ejs_Object_prototype); + thisArgument = _ejs_object_new_with_slot_hint (proto, F_->ctor_slot_hint); } // 6. Let calleeContext be PrepareForOrdinaryCall(F, newTarget). @@ -558,6 +564,20 @@ _ejs_function_specop_construct (ejsval F, ejsval newTarget, uint32_t argc, ejsva // 10. Let envRec be constructorEnv’s EnvironmentRecord. // 11. Let result be OrdinaryCallEvaluateBody(F, argumentsList). ejsval result = F_->func (F_->env, &thisArgument, argc, args, newTarget); + // birth-capacity feedback (gc-P5): remember how many fields the + // constructor installed so the NEXT base construct births `this` + // with embedded slot storage. One-shot 0 -> count; F_ is pinned by + // the conservative scan (it's C-stack-visible), so the pointer is + // stable across the body call. + if (kind == CONSTRUCTOR_KIND_BASE && F_->ctor_slot_hint == 0 + && EJSVAL_IS_OBJECT(thisArgument)) { + EJSObject* T_ = EJSVAL_TO_OBJECT(thisArgument); + if (T_->ops == &_ejs_Object_specops) { + uint32_t tshape = EJS_OBJECT_SHAPE(T_); + if (tshape != EJS_SHAPE_DICT) + F_->ctor_slot_hint = _ejs_shape_field_count (tshape); + } + } // 12. Remove calleeContext from the execution context stack and restore callerContext as the running execution context. // 13. If result.[[type]] is return, then // a. If Type(result.[[value]]) is Object, return NormalCompletion(result.[[value]]). diff --git a/runtime/ejs-function.h b/runtime/ejs-function.h index 8daec088..c4a4fbd8 100644 --- a/runtime/ejs-function.h +++ b/runtime/ejs-function.h @@ -32,6 +32,14 @@ typedef struct { EJSFunctionKind function_kind; EJSConstructorKind constructor_kind; + // birth-capacity hint (gc-P5): how many fields this function's + // constructor installed on its first `this` — subsequent base + // constructs allocate `this` with that many embedded slots so the + // result is a single cell. 0 = unknown/none. Occupies the + // struct's tail padding; compiled code never reads past `bound`, + // so lib/types.ts is unaffected. + uint32_t ctor_slot_hint; + } EJSFunction; diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 0245d5dd..7293055b 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -16,6 +16,7 @@ #include "ejs-function.h" #include "ejs-generator.h" #include "ejs-arguments.h" +#include "ejs-shapes.h" #include "ejs-value.h" #include "ejs-string.h" #include "ejs-symbol.h" @@ -1561,6 +1562,19 @@ minor_fixup_evacuated(GCObjectPtr from, GCObjectPtr to, size_t cell_size) if (d >= (char*)from && d < (char*)from + cell_size) a->args = (ejsval*)((char*)to + (d - (char*)from)); } + // shaped ordinary objects with EMBEDDED slot storage (gc-P5 + // single-cell allocation): the slots ejsval points into the + // cell. Shape bits are only ever set on ordinary objects, so + // the header test suffices; dictionary mode (shape 0) keeps + // the map pointer in the union and must not be touched. + else if (((h >> EJS_GC_HEADER_SHAPE_SHIFT) & EJS_GC_HEADER_SHAPE_MASK) + != EJS_SHAPE_DICT + && !EJSVAL_IS_NULL(o->slots)) { + char* d = (char*)EJSVAL_TO_CLOSUREENV_IMPL(o->slots); + if (d >= (char*)from && d < (char*)from + cell_size) + rewrite_slot_payload(&o->slots, + (GCObjectPtr)((char*)to + (d - (char*)from))); + } } } diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index e39fae08..296d906c 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -592,6 +592,15 @@ shaped_slots (EJSObject* obj) return shaped_env(obj)->slots; } +// is the slot storage embedded in the object's own cell (single-cell +// born-with-shape allocation, gc-P5)? Pointer identity is the mode +// test — no header bit to keep coherent through evacuation's memcpy. +static EJSBool +shaped_slots_are_embedded (EJSObject* obj) +{ + return (char*)shaped_env(obj) == (char*)obj + sizeof(EJSObject); +} + // grow slot storage to hold at least `needed` values. May allocate from // the GC heap: obj->slots stays attached (and scanned) until the copy is // done, so a collection triggered by the new array is safe. Growth is @@ -711,16 +720,74 @@ try_fill_shaped (ejsval objval, uint32_t argc, const ejsval* names, ejsval* valu } shaped_ensure_capacity (obj, argc); memcpy (shaped_slots(obj), values, argc * sizeof(ejsval)); + // the object is the barrier owner for shaped stores: its Scan walks + // the slot values directly (embedded storage has no cell of its own) for (uint32_t _wb = 0; _wb < (uint32_t)argc; _wb++) - _ejs_gc_remember(shaped_env(obj), values[_wb]); + _ejs_gc_remember(obj, values[_wb]); EJS_OBJECT_SET_SHAPE(obj, shape); return EJS_TRUE; } +// single-cell born-with-shape allocation (gc-P5): object + embedded +// slot storage in one GC cell — obj header | ops | proto | slots ejsval +// pointing at obj+32 | embedded env header | slot values. The embedded +// region is a real EJSClosureEnv layout, so every slots consumer +// (shaped_slots, compiled slotRef addressing, the collector's range +// walks) is oblivious; embedded-ness is pointer identity. nfields > 0; +// no GC can run between the alloc and the last store below. +static ejsval +shaped_alloc_embedded (ejsval proto, uint32_t shape, uint32_t nfields, + const ejsval* values) +{ + size_t size = sizeof(EJSObject) + sizeof(EJSClosureEnv) + + (nfields - 1) * sizeof(ejsval); + EJSObject* obj = _ejs_gc_new_obj(EJSObject, size); + _ejs_init_object (obj, proto, &_ejs_Object_specops); + EJSClosureEnv* env = (EJSClosureEnv*)((char*)obj + sizeof(EJSObject)); + env->gc_header = EJS_SCAN_TYPE_CLOSUREENV; + env->length = nfields; + if (values) + memcpy (env->slots, values, nfields * sizeof(ejsval)); + else + for (uint32_t i = 0; i < nfields; i ++) + env->slots[i] = _ejs_undefined; + obj->slots = CLOSUREENV_TO_EJSVAL_IMPL(env); + EJS_OBJECT_SET_SHAPE(obj, shape); + return OBJECT_TO_EJSVAL(obj); +} + +// ordinary-construct support: allocate the ordinary `this` with +// embedded slot capacity for `hint` fields (0 = today's bare cell). +// The object is born empty and root-shaped either way; the hint only +// pre-sizes the storage so the constructor's fill stays in-cell. +ejsval +_ejs_object_new_with_slot_hint (ejsval proto, uint32_t hint) +{ + if (!_ejs_shapes_tracking || hint == 0 || hint > EJS_SHAPE_EMBED_FIELD_MAX) + return _ejs_object_new (proto, &_ejs_Object_specops); + return shaped_alloc_embedded (proto, EJS_SHAPE_ROOT, hint, NULL); +} + // a statically-keyed object literal: allocate + install in one call ejsval _ejs_object_new_shaped (uint32_t argc, ejsval* names, ejsval* values) { + // derive the true shape from the actual values FIRST (pure — the + // transition memo makes it ~one compare per field), then birth + // object + storage as one cell. Anything off-script falls back to + // the two-cell fill / sequential path, byte-for-byte as before. + if (_ejs_shapes_tracking && argc > 0 && argc <= EJS_SHAPE_EMBED_FIELD_MAX + && !shaped_proto_intercepts (_ejs_Object_prototype, argc, names)) { + uint32_t shape = EJS_SHAPE_ROOT; + for (uint32_t i = 0; i < argc; i ++) { + EJSShapeMigrateReason reason; + shape = _ejs_shape_transition_add_fast (shape, names[i], values[i], &reason); + if (shape == EJS_SHAPE_DICT) + break; + } + if (shape != EJS_SHAPE_DICT) + return shaped_alloc_embedded (_ejs_Object_prototype, shape, argc, values); + } ejsval obj = _ejs_object_create (_ejs_Object_prototype); if (!try_fill_shaped (obj, argc, names, values)) { for (uint32_t i = 0; i < argc; i ++) @@ -2428,7 +2495,7 @@ _ejs_object_specop_set (ejsval O, ejsval P, ejsval V, ejsval Receiver) if (next_shape != EJS_SHAPE_DICT) { EJS_OBJECT_SET_SHAPE(O_, next_shape); shaped_slots(O_)[slot] = V; - _ejs_gc_remember(shaped_env(O_), V); + _ejs_gc_remember(O_, V); return EJS_TRUE; } // shape-table overflow: drop to dictionary mode and let the @@ -2626,7 +2693,7 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des else { EJS_OBJECT_SET_SHAPE(obj, next_shape); shaped_slots(obj)[slot] = value; - _ejs_gc_remember(shaped_env(obj), value); + _ejs_gc_remember(obj, value); return EJS_TRUE; } } @@ -2652,7 +2719,7 @@ _ejs_object_specop_define_own_property (ejsval O, ejsval P, EJSPropertyDesc* Des shaped_ensure_capacity (obj, nfields); EJS_OBJECT_SET_SHAPE(obj, next_shape); shaped_slots(obj)[nfields - 1] = value; - _ejs_gc_remember(shaped_env(obj), value); + _ejs_gc_remember(obj, value); return EJS_TRUE; } } @@ -2868,12 +2935,29 @@ scan_property_entries (EJSPropertyMap* map, EJSValueFunc scan_func) static void _ejs_object_specop_scan (EJSObject* obj, EJSValueFunc scan_func) { - // shaped mode: shaped objects trace their slot array (a closureenv, - // which scans its own ejsval range); field names are rooted by the - // global shape table - if (EJS_OBJECT_SHAPE(obj) != EJS_SHAPE_DICT) { - if (!EJSVAL_IS_NULL(obj->slots)) - scan_func (&(obj->slots)); + // shaped mode: walk the slot VALUES directly — the object is the + // barrier owner for shaped stores, so a dirty-object rescan must + // see them, and embedded storage has no cell of its own. Field + // names are rooted by the global shape table. + uint32_t obj_shape = EJS_OBJECT_SHAPE(obj); + if (obj_shape != EJS_SHAPE_DICT) { + if (!EJSVAL_IS_NULL(obj->slots)) { + EJSClosureEnv* env = shaped_env(obj); + // the shape's trace bitmap (gc-P5): f64-repr slots hold raw + // doubles — never references — so the walk skips them. + // Slots past field_count (hint slack) are undefined, whose + // mask bits are 0, so they scan as the no-ops they are. + uint32_t f64_mask = _ejs_shape_get(obj_shape)->f64_mask; + for (uint32_t i = 0; i < env->length; i ++) + if (!(f64_mask & (1u << i))) + scan_func (&env->slots[i]); + // out-of-line storage is a real cell: scan the edge so the + // env itself stays alive and the reference moves with it. + // The embedded edge is self-interior (not an object base) — + // the evacuation fixup rebases it instead. + if (!shaped_slots_are_embedded (obj)) + scan_func (&(obj->slots)); + } scan_func (&(obj->proto)); return; } diff --git a/runtime/ejs-object.h b/runtime/ejs-object.h index b4e5490d..965b7e51 100644 --- a/runtime/ejs-object.h +++ b/runtime/ejs-object.h @@ -317,6 +317,12 @@ ejsval _ejs_object_create (ejsval proto); ejsval _ejs_object_new_shaped (uint32_t argc, ejsval* names, ejsval* values); ejsval _ejs_object_fill_shaped (ejsval obj, uint32_t argc, ejsval* names, ejsval* values); +// ordinary-construct support (gc-P5): allocate an empty root-shaped +// ordinary object whose slot storage for `hint` fields is embedded in +// the object's own cell (0 = bare object, today's layout). Constructor +// birth-capacity hints route here so `new F()` results are single-cell. +ejsval _ejs_object_new_with_slot_hint (ejsval proto, uint32_t hint); + void _ejs_Object_init (ejsval ejs_global); EJS_END_DECLS diff --git a/runtime/ejs-shapes.c b/runtime/ejs-shapes.c index 2fdcf2f1..83d0885b 100644 --- a/runtime/ejs-shapes.c +++ b/runtime/ejs-shapes.c @@ -80,6 +80,11 @@ shape_alloc(uint32_t parent, ejsval name, uint8_t repr, uint32_t field_count) shape->field_count = field_count; shape->name = name; shape->repr = repr; + /* the trace bitmap (gc-P5): parent's mask plus this edge's repr bit. + the root (field_count 0, parent DICT) gets 0. */ + shape->f64_mask = (field_count > 0 ? shape_get(parent)->f64_mask : 0) + | (repr == EJS_SHAPE_REPR_F64 && field_count > 0 + ? (1u << (field_count - 1)) : 0); /* keep the field name alive: shapes are process-global and never freed */ if (EJSVAL_IS_STRING(name)) diff --git a/runtime/ejs-shapes.h b/runtime/ejs-shapes.h index 5558a910..3962f3b9 100644 --- a/runtime/ejs-shapes.h +++ b/runtime/ejs-shapes.h @@ -58,6 +58,13 @@ typedef enum { gives the LOS an O(log n) lookup or a 256-byte size class. */ #define EJS_SHAPE_FIELD_CAP_MAX 14 +/* single-cell (embedded-slots) allocation cap: object header (32) + + embedded env header (16) + 8 * fields must fit the 128-byte top cell, + or the cell would round to 256 and take the LOS routing that class + currently gets. Grows to EJS_SHAPE_FIELD_CAP_MAX when the 256-byte + size class is enabled (gc-P5). */ +#define EJS_SHAPE_EMBED_FIELD_MAX 10 + /* the shape index lives in bits 32-55 of the 64-bit GCObjectHeader (bit 56 is the storage-mode bit; 57-63 belong to the GC) — see the layout comment in ejs-types.h */ @@ -101,6 +108,11 @@ typedef struct { this shape; monomorphic construction sites hit it every time and skip the hash entirely */ uint32_t deaths; /* census: objects finalized bearing this shape */ + uint32_t f64_mask; /* the shape's trace bitmap (gc-P5): bit i set = + field i is EJS_SHAPE_REPR_F64, i.e. a raw + double the collector can skip. Built + incrementally (parent's mask | this edge) so + every walk is O(1); field cap 14 << 32 bits */ } EJSShape; #define EJS_SHAPE_CHUNK_SHIFT 12 From 8e85813cfa56b3afbb89a47b0bd023ba122b765b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 22:22:16 -0700 Subject: [PATCH 124/146] =?UTF-8?q?eir:=20gc-P5=20(P6.2)=20part=202=20?= =?UTF-8?q?=E2=80=94=20flag-off=20born-shaped=20literals;=20256-byte=20siz?= =?UTF-8?q?e=20class;=20phase=20closed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - lower.ts drops the oracle gate on make_object_shaped literals: key order/count are the site's static truth; without the oracle the static reprs are all-boxed and the runtime's birth derivation supplies true ones. Flag-off literals now allocate single-cell and join the shaped-literal sinking. Semantically identical by construction (make_object was object_create + per-key setprop — exactly new_shaped's screens and fallback). - The 256-byte size class is enabled: ffs(256)=9 > HIGH_LIMIT_BITS had routed 256B cells to the LOS since the beginning; the nursery seam, bump arrays, and emitter idx mapping were already built for 5 classes. HEAP_PAGELISTS_COUNT +1 (indexing documented), three ffs thresholds +1, inline-env emitter cap 128->256. Every cap-14 shape is now single-cell (EJS_SHAPE_EMBED_FIELD_MAX = FIELD_CAP_MAX) and 15..30-slot envs take pages, not the LOS. - gc-p5-results.md records the phase: litbench (escaping-literal loop) 1.56->0.85s (1.84x) flag-off; bench2 flag-off cells 8M->4M, 2.50->2.37s; LOS allocs on a compile workload 85.3k->26.3k (-69%); self-compile parity (60-67s vs 62-64 recorded). The headline correction: shapes-P5's "1.71s bench2 alloc-loop residual" was consumed by the ctor-sinking phases (--types bench2 is 0.21s at phase entry already) — gc-P5's payoff is flag-off code, literal loops, footprint, and LOS pressure. Emitted bump allocation for literals measured at ~6% of an alloc-heavy loop and deferred on that evidence, with the repr-divergence design note recorded. - Gates: matrix x7 green; embedded-slot stress probe + typed-slot/ bornshape/poly probes green under EVERY_N_ALLOC 7/31/101, PARANOID, NURSERY=off, SHAPES=off; --types diff lane 475 files 0-divergent. gc-P5 ticked in gc-plan.md; P6.2 ticked in plans.md. Co-Authored-By: Claude Fable 5 --- docs/gc-p5-results.md | 140 ++++++++++++++++++++++++++++++++++++++++++ docs/gc-plan.md | 14 ++++- docs/plans.md | 5 +- lib/compiler.ts | 2 +- lib/eir/lower.ts | 7 ++- runtime/ejs-gc.c | 17 +++-- runtime/ejs-shapes.h | 25 ++++---- 7 files changed, 186 insertions(+), 24 deletions(-) create mode 100644 docs/gc-p5-results.md diff --git a/docs/gc-p5-results.md b/docs/gc-p5-results.md new file mode 100644 index 00000000..dad68477 --- /dev/null +++ b/docs/gc-p5-results.md @@ -0,0 +1,140 @@ +# gc-P5 results: shapes intersection — single-cell shaped objects + +Completed 2026-07-28. The Step B design addendum lives in +gc-plan.md (the gc-P5 bullet); this doc records what shipped and the +gate numbers. + +## What shipped + +- **Single-cell shaped objects (embedded slots).** Born-with-shape + allocation places the slot storage inside the object's own cell: + 32B object + 16B embedded closureenv header + slots, one GC cell. + The governing design choice: `obj->slots` remains a closureenv-boxed + ejsval that merely points at `obj+32`, so the compiled slot + addressing seam (`slotRef`), has_shape guards, the verifier + contract, and the C storage engine's accessors are all UNTOUCHED — + embedded-ness is pointer identity (`env == obj+32`), no new header + bit, and growth past birth capacity silently degrades to the old + out-of-line array. Entry points: + - `_ejs_object_new_shaped` derives the true shape FIRST (pure, + transition-memo'd, ~one compare per field), then births object + + storage as one cell; anything off-script falls back byte-for-byte. + - Constructor results: a **birth-capacity hint on EJSFunction** + (one-shot feedback — the first construct's field count sizes every + later `this`). Ordinary `Construct` allocates `this` with + embedded capacity = hint. Works flag-off; zero compiler plumbing. +- **Barrier owner flip.** Shaped-slot stores now remember the wrapper + OBJECT (all five C sites + emitted `slot_store`); the ordinary Scan + walks slot values directly in both storage modes and scans the env + edge only when out-of-line. Remset owners are therefore always cell + heads — the interior-pointer entry class never exists. Scan order + (values, then edge) is load-bearing: a dirty rescan must rewrite + value slots before a young out-of-line env is evacuated. +- **Evacuation.** Whole-cell memcpy (the existing routine); the + embedded slots ejsval joins `minor_fixup_evacuated`'s + self-interior-pointer cases (flat strings, EJSArguments) and is + never presented to the precise slot callbacks (they assume + object-base payloads). +- **Per-shape trace masks (typed-slot trace elision).** `EJSShape` + grows `f64_mask`, built incrementally at intern time (parent mask | + edge bit). The shaped Scan skips f64 slots — precise trace elision + for raw doubles — on every collector walk (mark, minor, compaction + fixup, paranoid/verify) since they all route through the specop. + Barrier elision for typed stores was already true and is now + documented: emitted f64 `slot_store` skips the barrier + (emit.ts), and the runtime filter exits on non-traceable values. +- **Born-shaped literals go flag-off (lower.ts).** The + `make_object_shaped` literal lowering drops its oracle gate: key + order/count are the site's static truth; without the oracle the + static reprs are all-boxed and the runtime's birth derivation + supplies true ones. Flag-off literals now allocate single-cell and + are eligible for the shaped-literal sinking. Flag-off semantics are + identical by construction (`make_object` was `object_create` + + per-key setprop — exactly `new_shaped`'s screens and fallback). +- **The 256-byte size class is enabled.** `ffs(256)=9 > + HIGH_LIMIT_BITS` had routed 256B cells to the LOS since the + beginning — the nursery seam, bump arrays, and emitter mapping were + already built for 5 classes. With gc-P4's LOS bsearch + direct + arena map in, the class is on: `HEAP_PAGELISTS_COUNT` +1, three ffs + threshold comparisons +1, emitter inline-env cap 128→256. Every + cap-14 shape now fits a single cell (`EJS_SHAPE_EMBED_FIELD_MAX = + EJS_SHAPE_FIELD_CAP_MAX`), and 15..30-slot envs take pages, not the + LOS. + +## Numbers (arm64 M-series, medians of 3) + +| workload | before (d48cf69) | after | +|---|---|---| +| types-bench2, flag-off | 2.47–2.53 s | 2.37 s | +| types-bench2, --types | 0.21 s | 0.21 s | +| litbench1 (escaping-literal loop, flag-off) | 1.56 s | **0.85 s (1.84×)** | +| self-compile (stage2 action wall) | 62–64 s recorded (gc-P4) | 60–67 s across runs — parity | + +Allocation shape, types-bench2 flag-off: object+env cells **8.0M → +4.0M** (the 4M separate slot arrays are gone), requested bytes 305 → +244 MB, closureenv count 4,000,061 → 42. + +Allocation shape, compiling lib/desugar.js (the compiler compiling a +real module, flag-off): closureenv 5.47M → 5.22M; **LOS allocations +85,304 → 26,251 (−69%)** with 83,549 now in 256-byte page cells. +Shape-table transitions are UNCHANGED (~11.3M) — the born-shaped +derivation still walks one memo edge per field; what changed is cells, +bytes, and the per-add call path. + +**The headline correction this phase records**: shapes-P5's +"types-bench2 residual 1.71s = the allocation loop, gc-P5's half" is +obsolete. The ctor-sinking phases (sinking-P2/P3) virtualized both +bench2 construct sites (`ctorSunk=2`), and --types bench2 is now +0.21 s on the phase-entry baseline already. Profiling shows the old +"alloc loop" time was predominantly guard-miss generic property +traffic plus pre-sink allocation — gc-P5's real payoff is flag-off +code, literal-allocating loops, heap footprint, and LOS pressure. + +## Measured and deferred (the shapes-P6 discipline) + +- **Emitted bump allocation for `make_object_shaped`**: sampling the + 1.84×-improved litbench puts `_ejs_object_new_shaped` + `gc_alloc` + at ~6% of in-process samples; generic property reads (strict_eq, + getprop) dominate the flag-off residual. The emitted-inline variant + is deferred on that evidence. Design note for whoever picks it up: + inline stamping of the STATIC shape diverges from the runtime's + true-repr derivation (flag-off claims are all-boxed; a number stored + later would repr-flip the shape per object) — either derive + number-ness inline per boxed-claimed field or revisit + `classify_repr`'s number→f64 policy first. +- **Emitted inline construct-result allocation**: unnecessary — the + EJSFunction hint gets constructor results single-cell with no + compiler involvement, and the epoch-guarded ctor sink already + deletes the allocation entirely where it matters under --types. + +## Gates + +- Matrix ×7 green at every step (test-eir, lowtier, stage0–3 including + the stage2/stage3 byte-identity fixed point, stage1-shapes-off). +- Embedded-slot stress probe (growth past capacity, ctor hints with + under-sized hints, dictionary migration out of embedded storage, + repr flips, old→young stores through existing slots, enumeration + order, `in`): node-identical under + EJS_GC_EVERY_N_ALLOC=7/31/101, EJS_GC_PARANOID=1, + EJS_GC_NURSERY=off, EJS_SHAPES=off, EJS_GC_COMPACT=off. +- types-typedslots1 / types-bornshape1 / types-poly1 (--types builds) + green under the same stress envs (poly1 A/B'd bit-identical against + the phase-entry baseline binary). +- --types diff lane at phase close: **475 files, 474 identical, 0 + divergent, 1 N/A** (tester.js, the standing esprima parse gap) — + LANE PASS. + +## Notes for later phases + +- The old collector's promotion allocator + (`old_alloc_cell_for_promotion`) showed 61 samples walking its + free-page list in the compile profile — a P6.3-refactor-adjacent + perf item. +- Self-compile in-process time is dominated by `_ejs_op_strict_eq` + (196 samples — property-name compares in generic get paths and Map + lookups) and string flatten/compare churn, not allocation: the next + self-compile win lives in flag-off property access (compiler-P1 + lattice territory), not the collector. +- The pre-existing gc-P4 note about remset-rooted dead dirty owners + self-sustaining across full GCs applies unchanged to the new + object-owner entries. diff --git a/docs/gc-plan.md b/docs/gc-plan.md index a11786d1..d0ba8631 100644 --- a/docs/gc-plan.md +++ b/docs/gc-plan.md @@ -764,8 +764,20 @@ bounds as needed. footprint, 2-arena floor; knob census = 1. EJS_GC_COMPACT=off for A/B. Drive-bys: LOS tail-page leak on free; young-survivor-page full-sweep list corruption (young_page_freed). -- [ ] **gc-P5** shapes intersection (sequenced by maam P4): trace bitmaps, inline +- [x] **gc-P5** shapes intersection (sequenced by maam P4): trace bitmaps, inline slots, object-literal inline allocation, typed-slot elisions. + DONE 2026-07-28 — docs/gc-p5-results.md has the numbers. + Headlines: single-cell shaped objects (embedded slots behind the + unchanged obj->slots ejsval; pointer-identity mode test; ctor + birth-capacity hint on EJSFunction), barrier owner flipped to + the wrapper object with Scan walking slot values, per-shape + f64 trace masks, born-shaped literals extended to flag-off, and + the 256-byte size class enabled (LOS allocs −69% on a compile + workload). litbench 1.84×, bench2 cells halved; emitted bump + allocation for literals measured at ~6% of an alloc-heavy loop + and deferred on that evidence (the ctor sink + hint already + cover construction). Matrix ×7, stress envs, and the --types + diff lane (475 files, 0 divergent) green. - [ ] **gc-P6** collector thread: concurrent mark (SATB) + STW survivor evacuation. *Gate:* STW independent of live-set size. diff --git a/docs/plans.md b/docs/plans.md index 8aed9b15..a5c10d04 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -94,9 +94,10 @@ gc-plan.md, shapes-plan.md (Step B). - [x] **P6.1** mostly-copying major compaction + auto-tuned growth target (gc-P4). DONE 2026-07-26 — docs/gc-p4-results.md. -- [ ] **P6.2** shapes intersection: per-shape trace bitmaps, inline +- [x] **P6.2** shapes intersection: per-shape trace bitmaps, inline slots, object-literal inline allocation, typed-slot barrier - elision (gc-P5; consumes shapes-plan's deferred Step B). + elision (gc-P5; consumes shapes-plan's deferred Step B). DONE + 2026-07-28 — docs/gc-p5-results.md. - [ ] **P6.3** collector structural refactor: cell-lifecycle module, LOS lookup, file split (runtime-P4; can land any time after P6.1, behavior-preserving). diff --git a/lib/compiler.ts b/lib/compiler.ts index 57eee84c..95a3be45 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -753,7 +753,7 @@ class LLVMIRVisitor implements VisitorSurface { const value_size = 16 + 8 * n; // EJSClosureEnv: u64 header, u32 length(+pad), slots let cell_size = 16; while (cell_size < value_size) cell_size *= 2; - if (cell_size > 128) return slowCall(); // LOS-routed sizes take the runtime path + if (cell_size > 256) return slowCall(); // LOS-routed sizes take the runtime path const idx = Math.log2(cell_size) - 4; // seam word: bump[idx], limit[5+idx] const g = this.heapContextGlobal(); diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index c592b869..fe6fac36 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -579,9 +579,12 @@ class LowerFunction { // static truth, no oracle fact needed (the runtime // derives true reprs from the actual values and falls // back to sequential sets off the shaped fast path). - // Still --types-gated: flag-off lowering is untouched. + // NOT --types-gated (gc-P5): without the oracle the + // static reprs are simply all-boxed; the runtime's + // birth derivation supplies the true ones, and the + // single-cell embedded allocation applies to flag-off + // literals exactly as to typed ones. if ( - this.oracle && !process.env["EJS_NO_BORN_SHAPED"] && keys.length >= 1 && keys.length <= EJS_SHAPE_FIELD_CAP_MAX && diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 7293055b..335addc3 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -434,7 +434,16 @@ struct _LargeObjectInfo { #define OBJECT_SIZE_LOW_LIMIT_BITS 4 // smallest object we'll allocate (1<<4 = 16) #define OBJECT_SIZE_HIGH_LIMIT_BITS 8 // max object size for the non-LOS allocator = 256 -#define HEAP_PAGELISTS_COUNT (OBJECT_SIZE_HIGH_LIMIT_BITS - OBJECT_SIZE_LOW_LIMIT_BITS) + 1 // +1 because we're inclusive on OBJECT_SIZE_HIGH_LIMIT_BITS +// heap_pages is indexed by ffs(cell_size) - OBJECT_SIZE_LOW_LIMIT_BITS, +// i.e. 16B -> 1 .. 256B -> 5 ([0] is unused); +2 covers the inclusive +// top class. Until gc-P5 the ffs comparisons below routed 256-byte +// cells to the LOS (ffs(256) = 9 > HIGH_LIMIT_BITS), so the top class +// existed only on paper — the pre-gc-P4 LOS had a linear lookup that +// made large cell populations quadratic to mark. With the LOS bsearch +// and the direct arena map in, the class is enabled: single-cell shaped +// objects up to the 14-field cap (32+16+112 = 160) and >14-slot envs +// now take pages, not the LOS. +#define HEAP_PAGELISTS_COUNT (OBJECT_SIZE_HIGH_LIMIT_BITS - OBJECT_SIZE_LOW_LIMIT_BITS) + 2 static EJSList heap_pages[HEAP_PAGELISTS_COUNT]; static LargeObjectInfo *los_list; @@ -1215,7 +1224,7 @@ static void profile_note_alloc(size_t size, int ffs_bucket, EJSScanType scan_type) { int idx; - if (ffs_bucket > OBJECT_SIZE_HIGH_LIMIT_BITS) + if (ffs_bucket > OBJECT_SIZE_HIGH_LIMIT_BITS + 1) idx = 0; // LOS else { idx = ffs_bucket - OBJECT_SIZE_LOW_LIMIT_BITS; @@ -3348,7 +3357,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) // OLD-gen growth: promotions and direct old allocations). The // every-N stress knob triggers MINOR collections here — the full-GC // stress semantics of old mode are unchanged (below). - if (nursery_enabled && !gc_disabled && bucket <= OBJECT_SIZE_HIGH_LIMIT_BITS) { + if (nursery_enabled && !gc_disabled && bucket <= OBJECT_SIZE_HIGH_LIMIT_BITS + 1) { if (in_minor_gc) { _ejs_log ("GC BUG: young allocation during a minor collection\n"); abort(); @@ -3390,7 +3399,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) retry_allocation: { - if (bucket > OBJECT_SIZE_HIGH_LIMIT_BITS) { + if (bucket > OBJECT_SIZE_HIGH_LIMIT_BITS + 1) { SPEW(2, _ejs_log ("need to alloc %zd from los!!!\n", size)); rv = alloc_from_los(size, scan_type); if (rv && nursery_enabled) { diff --git a/runtime/ejs-shapes.h b/runtime/ejs-shapes.h index 3962f3b9..c7ad9e60 100644 --- a/runtime/ejs-shapes.h +++ b/runtime/ejs-shapes.h @@ -47,23 +47,20 @@ typedef enum { access. */ #define EJS_SHAPE_NOMATCH 0xFFFFFFu -/* hard ceiling on shaped field count (and EJS_SHAPE_CAP): a full slot - array must fit the page allocator's largest cell — 128 bytes: despite - the "= 256" comment on OBJECT_SIZE_HIGH_LIMIT_BITS, `ffs(256) = 9 > 8` - sends 256-byte allocations to the LOS, whose linear per-reference - lookup makes marking quadratic on big heaps (the stage2 self-compile - went from minutes to hours before this cap). 16-byte EJSClosureEnv - header + 14 * 8-byte slots = 128. Objects with more fields drop to - dictionary mode — the original map world. Revisit when the gc plan - gives the LOS an O(log n) lookup or a 256-byte size class. */ +/* hard ceiling on shaped field count (and EJS_SHAPE_CAP): a full + OUT-OF-LINE slot array must fit a page cell without waste — 16-byte + EJSClosureEnv header + 14 * 8-byte slots = 128 exactly — and the + single-cell embedded form fits the 256-byte class (32+16+112 = 160; + the class was LOS-routed by an ffs off-by-one until gc-P5 enabled + it on top of gc-P4's LOS bsearch + direct arena map). Objects with + more fields drop to dictionary mode — the original map world. */ #define EJS_SHAPE_FIELD_CAP_MAX 14 /* single-cell (embedded-slots) allocation cap: object header (32) + - embedded env header (16) + 8 * fields must fit the 128-byte top cell, - or the cell would round to 256 and take the LOS routing that class - currently gets. Grows to EJS_SHAPE_FIELD_CAP_MAX when the 256-byte - size class is enabled (gc-P5). */ -#define EJS_SHAPE_EMBED_FIELD_MAX 10 + embedded env header (16) + 8 * fields. With the 256-byte size class + enabled (gc-P5), every cap-14 shape fits a page cell (32+16+112 = + 160 -> 256), so the embed cap IS the field cap. */ +#define EJS_SHAPE_EMBED_FIELD_MAX EJS_SHAPE_FIELD_CAP_MAX /* the shape index lives in bits 32-55 of the 64-bit GCObjectHeader (bit 56 is the storage-mode bit; 57-63 belong to the GC) — see the From e5865831430ad3b976b3f47864dbea912eb74a9f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 22:23:55 -0700 Subject: [PATCH 125/146] =?UTF-8?q?test:=20gc5stress1=20=E2=80=94=20gc-P5?= =?UTF-8?q?=20embedded-slot=20stress=20probe=20joins=20the=20suite?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Growth past embedded capacity, ctor birth-capacity hints (incl. under-sized), dictionary migration out of embedded storage, repr flips, old->young stores through existing slots, enumeration order. Ran node-identical under EVERY_N_ALLOC 7/31/101, PARANOID, NURSERY=off, SHAPES=off during the phase; lives in the suite as the regression pin. Co-Authored-By: Claude Fable 5 --- test/gc5stress1.js | 104 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 test/gc5stress1.js diff --git a/test/gc5stress1.js b/test/gc5stress1.js new file mode 100644 index 00000000..486c365a --- /dev/null +++ b/test/gc5stress1.js @@ -0,0 +1,104 @@ +// gc-P5 embedded-slot stress: single-cell born-with-shape objects, +// growth past embedded capacity, ctor birth-capacity hints, dictionary +// migration out of embedded storage, f64 slots + repr flips, and +// old->young barrier traffic with the object as owner. Run under +// EJS_GC_EVERY_N_ALLOC to force collections between every step. + +// 1. ctor hint: first construct mishinted (bare cell + out-of-line), +// subsequent constructs embedded. p.x/p.y arithmetic keeps values hot. +function Point(x, y) { + this.x = x; + this.y = y; +} +var pts = []; +var s = 0; +for (var i = 0; i < 2000; i++) { + var p = new Point(i, i + 0.5); + pts.push(p); + s += p.x + p.y; +} +console.log("s1", s); + +// 2. growth past embedded capacity: literal born with 2 fields, then 6 +// more appended (out-of-line degrade), values must survive moves. +var grown = []; +for (var i = 0; i < 500; i++) { + var o = { a: i, b: "b" + i }; + o.c = i * 2; + o.d = { nested: i }; + o.e = "e" + i; + o.f = i + 0.25; + o.g = [i, i + 1]; + o.h = i % 2 === 0; + grown.push(o); +} +var t = 0; +for (var i = 0; i < grown.length; i++) { + var o = grown[i]; + t += o.a + o.c + o.f + o.d.nested + o.g[1] + (o.h ? 1 : 0); +} +console.log("s2", t, grown[123].b, grown[321].e); + +// 3. old->young stores through shaped slots: long-lived receivers get +// freshly allocated values written into existing slots (the +// barrier-owner-flip path), across many collections. +var holders = []; +for (var i = 0; i < 100; i++) holders.push({ v: null, w: 0 }); +for (var round = 0; round < 50; round++) { + for (var i = 0; i < holders.length; i++) { + holders[i].v = { fresh: round * 1000 + i }; + holders[i].w = round + i / 2; + } +} +var u = 0; +for (var i = 0; i < holders.length; i++) u += holders[i].v.fresh + holders[i].w; +console.log("s3", u); + +// 4. dictionary migration out of embedded storage: delete a field, then +// keep using the object. +var migr = []; +for (var i = 0; i < 300; i++) { + var m = { p: i, q: i * 3, r: "r" + i }; + if (i % 2 === 0) delete m.q; + migr.push(m); +} +var v = 0; +for (var i = 0; i < migr.length; i++) { + v += migr[i].p + (migr[i].q === undefined ? 0 : migr[i].q); +} +console.log("s4", v, migr[100].r, Object.keys(migr[0]).join(","), Object.keys(migr[1]).join(",")); + +// 5. repr flips in embedded slots: number slot takes a string, string +// slot takes a number. +var flip = []; +for (var i = 0; i < 200; i++) { + var f = { n: i, s: "x" + i }; + if (i % 3 === 0) { f.n = "now-a-string" + i; f.s = i * 7; } + flip.push(f); +} +var w = ""; +for (var i = 0; i < 5; i++) w += flip[i].n + "|" + flip[i].s + ";"; +console.log("s5", w); + +// 6. enumeration order + in-operator on embedded objects. +var e = { one: 1, two: 2, three: 3 }; +var names = []; +for (var k in e) names.push(k); +console.log("s6", names.join("/"), "two" in e, "nope" in e); + +// 7. ctor that installs a growing number of fields (hint too small on +// later constructs). +function Growy(n) { + this.base = n; + if (n % 2 === 0) { + this.extra1 = n + 1; + this.extra2 = n + 2; + this.extra3 = n + 3; + } +} +var g = 0; +for (var i = 0; i < 400; i++) { + var gr = new Growy(i); + g += gr.base + (gr.extra3 === undefined ? 0 : gr.extra3); +} +console.log("s7", g); From 511b060d831e5c60d148b5d5446f428e8e0b910f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 22:46:14 -0700 Subject: [PATCH 126/146] =?UTF-8?q?eir:=20runtime-P4=20(P6.3)=20part=201?= =?UTF-8?q?=20=E2=80=94=20cell=20lifecycle=20in=20one=20block;=20explicit?= =?UTF-8?q?=20mark=20epochs?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The color macros (SET_*/IS_* on bitmap bytes) and the white/black mask pair become one cell-lifecycle section: every state predicate and transition is an inline function, the encoding private to the block. The mask flip at the end of a full collection is now an explicit mark epoch — white/black are epoch-relative parities and mark_epoch_advance() (single site) ages black into white in O(1). The dead CONCURRENT CAS variants of the color macros go with it. Behavior-preserving: bitmap encodings and transition ordering are unchanged. test-stage0 green; the gc stress lane (EVERY_N_ALLOC 7/31/101 x PARANOID/VERIFY/NURSERY=off/COMPACT=off over the gc tests) matches the baseline failure set exactly (the pre-existing pinned generator-stress bugs, runtime-P1's burn-down list). Co-Authored-By: Claude Fable 5 --- runtime/ejs-gc.c | 192 ++++++++++++++++++++++------------------------- 1 file changed, 88 insertions(+), 104 deletions(-) diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 335addc3..5226e448 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -190,9 +190,9 @@ _ejs_gc_worklist_pop() EJS_MACRO_END #define WORKLIST_PUSH_AND_GRAY_CELL(x, cell) EJS_MACRO_START \ - if (IS_WHITE(cell)) { \ + if (cell_is_white(cell)) { \ _ejs_gc_worklist_push((GCObjectPtr)(x)); \ - SET_GRAY (cell); \ + cell_set_gray(&cell); \ } \ EJS_MACRO_END @@ -350,64 +350,49 @@ conservative_bounds_add(void* start, size_t size) static char *los_lo = (char*)UINTPTR_MAX; static char *los_hi = NULL; -typedef char BitmapCell; - -#define CELL_COLOR_MASK 0x03 -#define CELL_GRAY_MASK 0x02 -#define CELL_WHITE_MASK_START 0x00 -#define CELL_BLACK_MASK_START 0x01 -#define CELL_FREE 0x04 // cell is in the free list for this page +// ---- the cell lifecycle ---------------------------------------- +// +// One bitmap byte per page cell. A cell is FREE or ALLOCATED, and an +// allocated cell carries a tri-color mark; every state predicate and +// transition lives in this block, and the encoding is private to it. +// +// White/black are EPOCH-RELATIVE: the color bits hold GRAY or the +// parity of the mark epoch the cell was last colored in. color == +// (mark_epoch & 1) is black (marked this epoch); the complement is +// white. mark_epoch_advance() — called at exactly one site, the end +// of a full collection — thus turns every surviving black cell white +// in O(1) without touching a bitmap. (The old collector expressed +// the same aging as a white_mask/black_mask swap mutated at the same +// site; the epoch is that flip made explicit and single-owner.) -static unsigned int black_mask = CELL_BLACK_MASK_START; -static unsigned int white_mask = CELL_WHITE_MASK_START; +typedef char BitmapCell; -#if CONCURRENT -#define SET_GRAY(cell) EJS_MACRO_START \ - BitmapCell _bc; \ - do { \ - _bc = (cell); \ - } while (!__sync_bool_compare_and_swap (&cell, _bc, (_bc & ~CELL_COLOR_MASK) | CELL_GRAY_MASK)); \ - EJS_MACRO_END +#define CELL_COLOR_MASK 0x03 +#define CELL_GRAY 0x02 +#define CELL_FREE 0x04 // cell is in the free list for this page -#define SET_WHITE(cell) EJS_MACRO_START \ - BitmapCell _bc; \ - do { \ - _bc = (cell); \ - } while (!__sync_bool_compare_and_swap (&cell, _bc, (_bc & ~CELL_COLOR_MASK) | white_mask)); \ - EJS_MACRO_END +static unsigned int mark_epoch = 1; // parity 1: black starts at color 1 -#define SET_BLACK(cell) EJS_MACRO_START \ - BitmapCell _bc; \ - do { \ - _bc = (cell); \ - } while (!__sync_bool_compare_and_swap (&cell, _bc, (_bc & ~CELL_COLOR_MASK) | black_mask)); \ - EJS_MACRO_END +static inline BitmapCell cell_black_color(void) { return (BitmapCell)(mark_epoch & 1); } +static inline BitmapCell cell_white_color(void) { return (BitmapCell)((mark_epoch & 1) ^ 1); } -#define SET_FREE(cell) EJS_MACRO_START \ - BitmapCell _bc; \ - do { \ - _bc = (cell); \ - } while (!__sync_bool_compare_and_swap (&cell, _bc, CELL_FREE)); \ - EJS_MACRO_END +// the ONLY place the white/black meaning ever changes +static inline void +mark_epoch_advance(void) +{ + mark_epoch++; +} -#define SET_ALLOCATED(cell) EJS_MACRO_START \ - BitmapCell _bc; \ - do { \ - _bc = (cell); \ - } while (!__sync_bool_compare_and_swap (&cell, _bc, (_bc & ~CELL_FREE))); \ - EJS_MACRO_END -#else -#define SET_GRAY(cell) (cell) = (((cell) & ~CELL_COLOR_MASK) | CELL_GRAY_MASK) -#define SET_WHITE(cell) (cell) = (((cell) & ~CELL_COLOR_MASK) | white_mask) -#define SET_BLACK(cell) (cell) = (((cell) & ~CELL_COLOR_MASK) | black_mask) -#define SET_FREE(cell) (cell) = CELL_FREE -#define SET_ALLOCATED(cell) (cell) = ((cell) & ~CELL_FREE) -#endif +static inline EJSBool cell_is_free (BitmapCell c) { return (c & CELL_FREE) == CELL_FREE; } +static inline EJSBool cell_is_gray (BitmapCell c) { return (c & CELL_COLOR_MASK) == CELL_GRAY; } +static inline EJSBool cell_is_white(BitmapCell c) { return (c & CELL_COLOR_MASK) == cell_white_color(); } +static inline EJSBool cell_is_black(BitmapCell c) { return (c & CELL_COLOR_MASK) == cell_black_color(); } -#define IS_FREE(cell) (((cell) & CELL_FREE) == CELL_FREE) -#define IS_GRAY(cell) (((cell) & CELL_COLOR_MASK) == CELL_GRAY_MASK) -#define IS_WHITE(cell) (((cell) & CELL_COLOR_MASK) == white_mask) -#define IS_BLACK(cell) (((cell) & CELL_COLOR_MASK) == black_mask) +static inline void cell_set_gray (BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | CELL_GRAY); } +static inline void cell_set_white(BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | cell_white_color()); } +static inline void cell_set_black(BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | cell_black_color()); } +static inline void cell_set_free (BitmapCell* c) { *c = CELL_FREE; } +static inline void cell_set_allocated(BitmapCell* c) { *c = (BitmapCell)(*c & ~CELL_FREE); } struct _PageInfo { EJS_LIST_HEADER(struct _PageInfo); @@ -585,7 +570,7 @@ static inline EJSBool cell_is_allocated(PageInfo* page, uint32_t cell_idx, BitmapCell cell) { if (page->young == 1) return young_cell_is_allocated(page, cell_idx); - return !IS_FREE(cell); + return !cell_is_free(cell); } void* ptr_to_arena(void* ptr) { return PTR_TO_ARENA(ptr); } @@ -727,7 +712,7 @@ set_gray (GCObjectPtr ptr) if (!page) return; - SET_GRAY(page->page_bitmap[cell_idx]); + cell_set_gray(&page->page_bitmap[cell_idx]); } static void @@ -738,7 +723,7 @@ set_black (GCObjectPtr ptr) if (!page) return; - SET_BLACK(page->page_bitmap[cell_idx]); + cell_set_black(&page->page_bitmap[cell_idx]); } static EJSBool @@ -749,7 +734,7 @@ is_white (GCObjectPtr ptr) if (!page) return EJS_FALSE; - return IS_WHITE(page->page_bitmap[cell_idx]); + return cell_is_white(page->page_bitmap[cell_idx]); } static PageInfo* @@ -816,7 +801,7 @@ static void _ejs_finalize_obj(GCObjectPtr ptr, Arena* arena, PageInfo* info, uint32_t cell_idx) { EJS_ASSERT(info); - if (IS_FREE(info->page_bitmap[cell_idx])) { + if (cell_is_free(info->page_bitmap[cell_idx])) { return; } @@ -829,7 +814,7 @@ _ejs_finalize_obj(GCObjectPtr ptr, Arena* arena, PageInfo* info, uint32_t cell_i #endif info->cell_size); - SET_FREE(info->page_bitmap[cell_idx]); + cell_set_free(&info->page_bitmap[cell_idx]); SPEW(3, _ejs_log ("finalized object %p in page %p, num_free_cells == %zd\n", ptr, info, info->num_free_cells + 1)); // if this page is empty, move it to this arena's free list LOCK_PAGE(info); @@ -1056,7 +1041,7 @@ mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) if (gc_profile) profile_note_pin(page, cell_idx, gcptr); else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; - if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells + if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells // canonicalize interior pointers to the start of their cell; the // worklist processing reads the object header from the pointer. @@ -1150,7 +1135,7 @@ mark_ejsvals_in_range(void* low, void* high) if (gc_profile) profile_note_pin(page, cell_idx, gcptr); else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; - if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells + if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells // canonicalize interior pointers to the start of their cell; the // worklist processing reads the object header from the pointer. @@ -1300,14 +1285,14 @@ profile_pre_sweep(void) GCObjectPtr p = page->page_start; for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { BitmapCell cell = page->page_bitmap[c]; - if (IS_FREE(cell) || IS_WHITE(cell)) continue; + if (cell_is_free(cell) || cell_is_white(cell)) continue; profile_visit_live_cell((GCObjectHeader*)p, page->cell_size); } }); } for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { BitmapCell cell = lobj->page_info.page_bitmap[0]; - if (IS_FREE(cell) || IS_WHITE(cell)) continue; + if (cell_is_free(cell) || cell_is_white(cell)) continue; profile_visit_live_cell((GCObjectHeader*)lobj->page_info.page_start, lobj->page_info.cell_size); } @@ -1502,7 +1487,7 @@ young_page_install(int idx, size_t cell_size) heap_priv.young_alloced += PAGE_SIZE; // colors start at the CURRENT white (a young cell must never read // as black mid-cycle); allocated-ness comes from the bump rule - memset (info->page_bitmap, white_mask, info->num_cells * sizeof(BitmapCell)); + memset (info->page_bitmap, cell_white_color(), info->num_cells * sizeof(BitmapCell)); heap_priv.young_current[idx] = info; _ejs_heap.bump[idx] = info->page_start; _ejs_heap.limit[idx] = info->page_end; @@ -1616,12 +1601,12 @@ minor_conservative_hit(PageInfo* page, uint32_t cell_idx) { if (!page->young) return; if (page->young == 1 && !young_cell_is_allocated(page, cell_idx)) return; - if (page->young == 2 && IS_FREE(page->page_bitmap[cell_idx])) return; + if (page->young == 2 && cell_is_free(page->page_bitmap[cell_idx])) return; BitmapCell cell = page->page_bitmap[cell_idx]; - if (IS_BLACK(cell)) return; // already pinned this minor + if (cell_is_black(cell)) return; // already pinned this minor GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); if (_ejs_gc_is_forwarded(base)) return; // pins precede evacuation; stale hit - SET_BLACK(page->page_bitmap[cell_idx]); + cell_set_black(&page->page_bitmap[cell_idx]); heap_priv.minor_pins++; MINOR_SPEW("minor: pin %p\n", base); gc_watch_hit ("pin", base); @@ -1681,7 +1666,7 @@ minor_process_slot(ejsval* slot) rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(base)); return; } - if (IS_BLACK(page->page_bitmap[cell_idx])) { + if (cell_is_black(page->page_bitmap[cell_idx])) { // pinned: stays put, already queued for scanning. The current // owner must stay dirty so the edge is revisited next cycle. minor_scan_saw_young = EJS_TRUE; @@ -1720,7 +1705,7 @@ minor_process_primstr_child(EJSPrimString** childp) *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(base); return; } - if (IS_BLACK(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } + if (cell_is_black(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); memcpy (to, base, page->cell_size); // promoted: not young; and not DIRTY — the memcpy'd bit would make @@ -1789,13 +1774,13 @@ old_gen_walk(void (*fn)(GCObjectPtr)) if (!info || info->young) continue; GCObjectPtr p = info->page_start; for (int c = 0; c < CELLS_IN_PAGE(info); c++, p += info->cell_size) { - if (IS_FREE(info->page_bitmap[c])) continue; + if (cell_is_free(info->page_bitmap[c])) continue; fn (p); } } } for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { - if (IS_FREE(lobj->page_info.page_bitmap[0])) continue; + if (cell_is_free(lobj->page_info.page_bitmap[0])) continue; fn (lobj->page_info.page_start); } } @@ -1887,7 +1872,7 @@ verify_check_slot(ejsval* slot) if (!page) return; GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); if (_ejs_gc_is_forwarded(base)) return; // will be rewritten by its recorder - if (IS_BLACK(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } // pinned in place + if (cell_is_black(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } // pinned in place verify_bad_slot = slot; } static void @@ -1930,7 +1915,7 @@ verify_check_object(GCObjectPtr p) PageInfo* pg = find_page_and_cell(kids[k], &ci); if (!pg) continue; if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) continue; - if (IS_BLACK(pg->page_bitmap[ci])) continue; + if (cell_is_black(pg->page_bitmap[ci])) continue; _ejs_log ("EJS_GC_VERIFY: old primstr %p (type %d) child %d -> unpromoted young %p\n", p, EJS_PRIMSTR_GET_TYPE(ps), k, (void*)kids[k]); abort(); @@ -2027,7 +2012,7 @@ paranoid_sweep_check(void) for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { EJSBool allocated = (page->young == 1) ? young_cell_is_allocated(page, (uint32_t)c) - : !IS_FREE(page->page_bitmap[c]); + : !cell_is_free(page->page_bitmap[c]); if (allocated && !_ejs_gc_is_forwarded(p)) paranoid_check_object(p); } @@ -2220,21 +2205,21 @@ _ejs_gc_minor_collect(const char* reason) for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { EJSBool allocated = (page->young == 1) ? young_cell_is_allocated(page, (uint32_t)c) - : !IS_FREE(page->page_bitmap[c]); - if (!allocated) { SET_FREE(page->page_bitmap[c]); continue; } + : !cell_is_free(page->page_bitmap[c]); + if (!allocated) { cell_set_free(&page->page_bitmap[c]); continue; } if (_ejs_gc_is_forwarded(p)) { // evacuated: the space is reusable; poison it now that // every slot has been processed gc_watch_hit ("sweep-poison-forwarded", p); memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison - SET_FREE(page->page_bitmap[c]); + cell_set_free(&page->page_bitmap[c]); continue; } - if (IS_BLACK(page->page_bitmap[c])) { + if (cell_is_black(page->page_bitmap[c])) { // pinned survivor: stays young, stays put; back to white // so the next cycle (minor or full) sees it fresh - SET_WHITE(page->page_bitmap[c]); - SET_ALLOCATED(page->page_bitmap[c]); + cell_set_white(&page->page_bitmap[c]); + cell_set_allocated(&page->page_bitmap[c]); survivors++; continue; } @@ -2249,7 +2234,7 @@ _ejs_gc_minor_collect(const char* reason) gc_watch_hit ("sweep-poison-dead", p); finalize_object(p); memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison - SET_FREE(page->page_bitmap[c]); + cell_set_free(&page->page_bitmap[c]); } _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)page); if (survivors == 0) { @@ -2360,10 +2345,10 @@ young_normalize_for_full_gc(void) int allocated = 0; for (int c = 0; c < CELLS_IN_PAGE(page); c++) { if (young_cell_is_allocated(page, (uint32_t)c)) { - SET_ALLOCATED(page->page_bitmap[c]); + cell_set_allocated(&page->page_bitmap[c]); allocated++; } else { - SET_FREE(page->page_bitmap[c]); + cell_set_free(&page->page_bitmap[c]); } } page->num_free_cells = page->num_cells - allocated; @@ -2441,12 +2426,12 @@ sweep_heap() for (int c = 0, ce = info->num_cells; c < ce; c ++) { BitmapCell cell = info->page_bitmap[c]; - if (IS_FREE(cell)) + if (cell_is_free(cell)) continue; total_objs++; - if (IS_WHITE(cell)) { + if (cell_is_white(cell)) { white_objs++; GCObjectPtr gcobj = (GCObjectPtr)(info->page_start + c * info->cell_size); @@ -2465,7 +2450,7 @@ sweep_heap() PageInfo *info = &lobj->page_info; BitmapCell cell = info->page_bitmap[0]; LargeObjectInfo *next = lobj->next; - if (IS_WHITE(cell)) { + if (cell_is_white(cell)) { // SPEW(2, { _ejs_log ("l"); fflush(stderr); }); white_objs++; @@ -2501,8 +2486,8 @@ mark_from_roots() continue; BitmapCell cell = page->page_bitmap[cell_idx]; - if (IS_FREE(cell)) continue; // skip free cells - if (!IS_WHITE(cell)) continue; // skip pointers to gray/black cells + if (cell_is_free(cell)) continue; // skip free cells + if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells WORKLIST_PUSH_AND_GRAY_CELL(root_ptr, page->page_bitmap[cell_idx]); } } @@ -2663,7 +2648,7 @@ mark_object_root(GCObjectPtr ptr) else minor_wl_push(ptr); return; } - if (!IS_WHITE(cell)) + if (!cell_is_white(cell)) return; WORKLIST_PUSH_AND_GRAY_CELL(ptr, page->page_bitmap[cell_idx]); } @@ -2804,7 +2789,7 @@ compact_page_has_pins(PageInfo* pg) { GCObjectPtr p = pg->page_start; for (int c = 0; c < pg->num_cells; c++, p += pg->cell_size) - if (!IS_FREE(pg->page_bitmap[c]) + if (!cell_is_free(pg->page_bitmap[c]) && (*(GCObjectHeader*)p & EJS_GC_HEADER_PINNED)) return EJS_TRUE; return EJS_FALSE; @@ -2834,14 +2819,14 @@ compact_evacuate_page(int bucket, PageInfo* pg, PageInfo** cursor) { GCObjectPtr from = pg->page_start; for (int c = 0; c < pg->num_cells; c++, from += pg->cell_size) { - if (IS_FREE(pg->page_bitmap[c])) + if (cell_is_free(pg->page_bitmap[c])) continue; PageInfo* dest_page; GCObjectPtr to = compact_alloc_dest(bucket, cursor, &dest_page); memcpy (to, from, pg->cell_size); // the copy is live THIS cycle: keep it marked so the coming // color flip turns it white with every other survivor - SET_BLACK(dest_page->page_bitmap[PTR_TO_CELL(to, dest_page)]); + cell_set_black(&dest_page->page_bitmap[PTR_TO_CELL(to, dest_page)]); minor_fixup_evacuated(from, to, pg->cell_size); _ejs_gc_forward(from, to); gc_watch_hit ("compact-evacuate-from", from); @@ -2955,7 +2940,7 @@ compact_old_gen(void) for (PageInfo* pg = (PageInfo*)heap_priv.young_pages.head; pg; pg = pg->next) { GCObjectPtr p = pg->page_start; for (int c = 0; c < CELLS_IN_PAGE(pg); c++, p += pg->cell_size) - if (!IS_FREE(pg->page_bitmap[c])) + if (!cell_is_free(pg->page_bitmap[c])) compact_fixup_object(p); } @@ -3107,9 +3092,8 @@ _ejs_gc_collect_inner(EJSBool shutting_down) _ejs_log (" garbage objects: %d\n", white_objs); #endif - unsigned int tmp = black_mask; - black_mask = white_mask; - white_mask = tmp; + // age the survivors: this epoch's black is next epoch's white + mark_epoch_advance(); if (shutting_down) { // NULL out all of our roots @@ -3140,7 +3124,7 @@ _ejs_gc_collect_inner(EJSBool shutting_down) for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { EJS_LIST_FOREACH (&heap_pages[hp], PageInfo, page, { for (int c = 0; c < CELLS_IN_PAGE (page); c ++) { - if (!IS_FREE(page->page_bitmap[c]) && !IS_WHITE(page->page_bitmap[c])) + if (!cell_is_free(page->page_bitmap[c]) && !cell_is_white(page->page_bitmap[c])) continue; } }) @@ -3263,7 +3247,7 @@ alloc_from_page(PageInfo *info) } else { for (cell = 0; cell < info->num_cells; cell ++) { - if (IS_FREE(info->page_bitmap[cell])) { + if (cell_is_free(info->page_bitmap[cell])) { rv = info->page_start + (cell * info->cell_size); break; } @@ -3272,8 +3256,8 @@ alloc_from_page(PageInfo *info) EJS_ASSERT (rv); - SET_ALLOCATED(info->page_bitmap[cell]); - SET_WHITE(info->page_bitmap[cell]); + cell_set_allocated(&info->page_bitmap[cell]); + cell_set_white(&info->page_bitmap[cell]); info->num_free_cells --; @@ -3302,8 +3286,8 @@ alloc_from_los(size_t size, EJSScanType scan_type) rv->page_info.num_free_cells = 0; rv->page_info.los_info = rv; - SET_WHITE(rv->page_info.page_bitmap[0]); - SET_ALLOCATED(rv->page_info.page_bitmap[0]); + cell_set_white(&rv->page_info.page_bitmap[0]); + cell_set_allocated(&rv->page_info.page_bitmap[0]); *((GCObjectHeader*)rv->page_info.page_start) = scan_type | EJS_GC_HEADER_YOUNG; @@ -3555,7 +3539,7 @@ _ejs_gc_dump_heap_stats() EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { GCObjectPtr p = page->page_start; for (int c = 0; c < CELLS_IN_PAGE (page); c ++, p += page->cell_size) { - if (IS_FREE(page->page_bitmap[c])) + if (cell_is_free(page->page_bitmap[c])) continue; GCObjectHeader* headerp = (GCObjectHeader*)p; if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) _ejs_log ("O"); @@ -3634,7 +3618,7 @@ static EJS_NATIVE_FUNC(_ejs_GC_dumpLiveStrings) { EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { GCObjectPtr p = page->page_start; for (int c = 0; c < CELLS_IN_PAGE (page); c ++, p += page->cell_size) { - if (IS_FREE(page->page_bitmap[c])) + if (cell_is_free(page->page_bitmap[c])) continue; GCObjectHeader* headerp = (GCObjectHeader*)p; From 039eb2f4aae94c47d27364a9a1495dfc24769162 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 22:50:57 -0700 Subject: [PATCH 127/146] =?UTF-8?q?eir:=20runtime-P4=20(P6.3)=20part=202?= =?UTF-8?q?=20=E2=80=94=20root=20registry;=20one=20collection-policy=20fun?= =?UTF-8?q?ction?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The root set becomes a real registry: a growable array (O(1) add, swap-with-last remove) with ONE iteration helper that full-GC mark, minor evacuation, compaction fixup, and the debug walks all share — five hand-rolled linked-list walks collapse into root_registry_foreach callbacks. Every collection the runtime initiates for itself now goes through gc_policy(event): the growth trigger on the old-allocation path, the post-minor promotion check, the EVERY_N_ALLOC stress cadences (minor in nursery mode, full in old mode), and the forced allocation-failure collections. Each event preserves its historical baseline/counter resets exactly, so collection schedules are unchanged. test-stage0 green; gc stress lane identical to baseline. Co-Authored-By: Claude Fable 5 --- runtime/ejs-gc.c | 220 +++++++++++++++++++++++++++-------------------- 1 file changed, 129 insertions(+), 91 deletions(-) diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 5226e448..5cb98494 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -196,12 +196,25 @@ _ejs_gc_worklist_pop() } \ EJS_MACRO_END -typedef struct _RootSetEntry { - EJS_LIST_HEADER(struct _RootSetEntry); - ejsval* root; -} RootSetEntry; +// ---- the root registry ----------------------------------------- +// +// Registered roots are the addresses of ejsval slots in static or +// malloc'd storage (atoms, well-knowns, the OOM exceptions). A +// growable array: O(1) add, swap-with-last remove, and ONE iteration +// helper every collector phase shares — full-GC mark, minor +// evacuation, compaction fixup, and the debug walks see the same set +// by construction. (The predecessor was a malloc'd linked list with +// five hand-rolled walks.) +static ejsval** root_registry; +static int root_registry_count; +static int root_registry_capacity; -static RootSetEntry *root_set; +static void +root_registry_foreach(void (*fn)(ejsval*)) +{ + for (int i = 0; i < root_registry_count; i++) + fn(root_registry[i]); +} #ifndef MAP_NORESERVE #define MAP_NORESERVE 0 @@ -542,6 +555,7 @@ static GCObjectPtr young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_ // allocator accounting, defined with the allocator further down extern size_t alloc_size; extern size_t alloc_size_at_last_gc; +extern int num_allocs; static size_t heap_size_at_last_gc; // gc-P4: the compacting major (EJS_GC_COMPACT=off for A/B) and THE @@ -561,6 +575,70 @@ full_gc_trigger(void) return t > floor_ ? t : floor_; } +// ---- the collection policy ------------------------------------- +// +// Every collection the runtime initiates on its own behalf is decided +// HERE (GC.collect() and the shutdown collection are driver requests, +// not policy). Two inputs: old-gen growth since the last full +// collection — alloc_size - alloc_size_at_last_gc, promotions included +// — against full_gc_trigger(), and the EJS_GC_EVERY_N_ALLOC stress +// knob (minor cadence in nursery mode, full cadence in old mode). +// Each event preserves its historical baseline/counter resets exactly: +// AFTER_MINOR deliberately leaves num_allocs alone (the stress-minor +// cadence owns it), and ALLOC_FAILED collects even under +// EJS_GC_DISABLE — it is the allocator's last resort before throwing. +typedef enum { + GC_POLICY_YOUNG_ALLOC, // a nursery allocation is about to run + GC_POLICY_OLD_ALLOC, // an old-gen/LOS allocation is about to run + GC_POLICY_AFTER_MINOR, // a minor just retired; promotions grew the old gen + GC_POLICY_ALLOC_FAILED // allocator out of memory: forced full +} GCPolicyEvent; + +static void +gc_policy(GCPolicyEvent ev, const char* reason) +{ + if (ev == GC_POLICY_ALLOC_FAILED) { + _ejs_gc_collect (reason); + alloc_size_at_last_gc = alloc_size; + num_allocs = 0; + return; + } + + if (gc_disabled) + return; + + switch (ev) { + case GC_POLICY_YOUNG_ALLOC: + if (collect_every_alloc && collect_every_alloc == num_allocs) { + num_allocs = 0; + _ejs_gc_minor_collect ("every_n_alloc"); + } + break; + case GC_POLICY_OLD_ALLOC: + if (alloc_size - alloc_size_at_last_gc >= full_gc_trigger()) { + _ejs_gc_collect ("alloc_size"); + alloc_size_at_last_gc = alloc_size; + num_allocs = 0; + } + else if (!nursery_enabled && collect_every_alloc && collect_every_alloc == num_allocs) { + _ejs_gc_collect ("every_n_alloc"); + alloc_size_at_last_gc = alloc_size; + num_allocs = 0; + } + break; + case GC_POLICY_AFTER_MINOR: + // when nearly every allocation is young, this is the only + // place the growth trigger can fire + if (alloc_size - alloc_size_at_last_gc >= full_gc_trigger()) { + _ejs_gc_collect ("promotion growth"); + alloc_size_at_last_gc = alloc_size; + } + break; + case GC_POLICY_ALLOC_FAILED: // handled above + break; + } +} + // allocated-ness of a cell: old pages answer from the bitmap; ACTIVE // young pages (young==1) answer from the bump rule — everything below // the bump cursor is an object, the bitmap holds only collection @@ -909,8 +987,6 @@ _ejs_gc_init() _ejs_gc_worklist_init(); - root_set = NULL; - // the generational nursery (EJS_GC_NURSERY=off selects // the old single-generation collector for A/B and differential runs) nursery_init(); @@ -1832,8 +1908,7 @@ paranoid_report_referrers(GCObjectPtr p) old_gen_walk (referrer_check_object); referrer_ctx = "roots"; referrer_owner = NULL; - for (RootSetEntry *entry = root_set; entry; entry = entry->next) - if (entry->root) referrer_check_slot(entry->root); + root_registry_foreach (referrer_check_slot); referrer_ctx = "modules"; for (int i = 0; i < _ejs_num_modules; i++) { EJSObject* mod = (EJSObject*)_ejs_modules[i]; @@ -1997,8 +2072,7 @@ static void paranoid_sweep_check(void) { paranoid_ctx = "roots"; - for (RootSetEntry* e = root_set; e; e = e->next) - if (e->root) paranoid_check_slot(e->root); + root_registry_foreach (paranoid_check_slot); paranoid_ctx = "modules"; for (int i = 0; i < _ejs_num_modules; i++) { EJSObject* mod = (EJSObject*)_ejs_modules[i]; @@ -2119,11 +2193,8 @@ _ejs_gc_minor_collect(const char* reason) gc_frame_moves = heap_priv.promoted_objs - promoted_before_frames; } - // 2. precise roots: the root list and module exports evacuate - for (RootSetEntry *entry = root_set; entry; entry = entry->next) { - if (entry->root) - minor_process_slot(entry->root); - } + // 2. precise roots: the root registry and module exports evacuate + root_registry_foreach (minor_process_slot); for (int i = 0; i < _ejs_num_modules; i++) { EJSObject* mod = (EJSObject*)_ejs_modules[i]; if (mod->ops == NULL) continue; @@ -2291,14 +2362,8 @@ _ejs_gc_minor_collect(const char* reason) #undef PHUS } - // promotions grow the old gen; when nearly every allocation is - // young, this is the only place the full-collection trigger can fire - if (!gc_disabled) { - if (alloc_size - alloc_size_at_last_gc >= full_gc_trigger()) { - _ejs_gc_collect("promotion growth"); - alloc_size_at_last_gc = alloc_size; - } - } + // promotions grow the old gen; the policy may schedule a full + gc_policy (GC_POLICY_AFTER_MINOR, NULL); } // the young allocation slow path: refill the class's bump page, running @@ -2466,31 +2531,31 @@ sweep_heap() } static void -mark_from_roots() +mark_root_slot(ejsval* root) { - SPEW (2, _ejs_log ("marking from roots")); + num_roots++; + ejsval rootval = *root; + if (!EJSVAL_IS_GCTHING_IMPL(rootval)) + return; + GCObjectPtr root_ptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(rootval); + if (root_ptr == NULL) + return; + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(root_ptr, &cell_idx); + if (!page) + return; - // mark from our registered roots - for (RootSetEntry *entry = root_set; entry; entry = entry->next) { - num_roots++; - if (entry->root) { - ejsval rootval = *entry->root; - if (!EJSVAL_IS_GCTHING_IMPL(rootval)) - continue; - GCObjectPtr root_ptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(rootval); - if (root_ptr == NULL) - continue; - uint32_t cell_idx; - PageInfo* page = find_page_and_cell(root_ptr, &cell_idx); - if (!page) - continue; + BitmapCell cell = page->page_bitmap[cell_idx]; + if (cell_is_free(cell)) return; // skip free cells + if (!cell_is_white(cell)) return; // skip pointers to gray/black cells + WORKLIST_PUSH_AND_GRAY_CELL(root_ptr, page->page_bitmap[cell_idx]); +} - BitmapCell cell = page->page_bitmap[cell_idx]; - if (cell_is_free(cell)) continue; // skip free cells - if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells - WORKLIST_PUSH_AND_GRAY_CELL(root_ptr, page->page_bitmap[cell_idx]); - } - } +static void +mark_from_roots() +{ + SPEW (2, _ejs_log ("marking from roots")); + root_registry_foreach (mark_root_slot); SPEW (2, _ejs_log ("done marking from roots")); } @@ -2919,9 +2984,7 @@ compact_old_gen(void) // 2. fixup: rewrite every reference that can name a moved cell, and // clear the cycle's pins while walking the live set. Runs even // when nothing was evacuated — the pins must reset either way. - for (RootSetEntry* e = root_set; e; e = e->next) - if (e->root) - compact_fixup_slot(e->root); + root_registry_foreach (compact_fixup_slot); for (int i = 0; i < _ejs_num_modules; i++) { EJSObject* mod = (EJSObject*)_ejs_modules[i]; if (mod->ops) @@ -3098,15 +3161,11 @@ _ejs_gc_collect_inner(EJSBool shutting_down) if (shutting_down) { // NULL out all of our roots - RootSetEntry *entry = root_set; - while (entry) { - RootSetEntry *next = entry->next; - *entry->root = _ejs_null; - free (entry); - entry = next; - } - - root_set = NULL; + for (int i = 0; i < root_registry_count; i++) + *root_registry[i] = _ejs_null; + free (root_registry); + root_registry = NULL; + root_registry_count = root_registry_capacity = 0; SPEW(1, _ejs_log ("final gc page statistics:\n"); for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { @@ -3346,10 +3405,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) _ejs_log ("GC BUG: young allocation during a minor collection\n"); abort(); } - if (collect_every_alloc && collect_every_alloc == num_allocs) { - num_allocs = 0; - _ejs_gc_minor_collect("every_n_alloc"); - } + gc_policy (GC_POLICY_YOUNG_ALLOC, NULL); int idx = bucket - OBJECT_SIZE_LOW_LIMIT_BITS - 1; // 16B -> 0 void* p = _ejs_heap.bump[idx]; if (EJS_LIKELY((char*)p + bucket_size <= (char*)_ejs_heap.limit[idx])) { @@ -3367,19 +3423,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) alloc_size += size; - if (!gc_disabled) { - char *gc_reason = NULL; - if (alloc_size - alloc_size_at_last_gc >= full_gc_trigger()) { - gc_reason = "alloc_size"; - } else if (!nursery_enabled && collect_every_alloc && collect_every_alloc == num_allocs) { - gc_reason = "every_n_alloc"; - } - if (gc_reason) { - _ejs_gc_collect(gc_reason); - alloc_size_at_last_gc = alloc_size; - num_allocs = 0; - } - } + gc_policy (GC_POLICY_OLD_ALLOC, NULL); retry_allocation: { @@ -3400,9 +3444,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) else { _ejs_log ("los allocation (size = %d) failed, trying to collect", size); UNLOCK_GC(); - _ejs_gc_collect ("los allocation fail"); - alloc_size_at_last_gc = alloc_size; - num_allocs = 0; + gc_policy (GC_POLICY_ALLOC_FAILED, "los allocation fail"); goto retry_allocation; } } @@ -3423,9 +3465,7 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) else { _ejs_log ("page allocation failed, trying to collect"); UNLOCK_GC(); - _ejs_gc_collect ("page allocation fail"); - alloc_size_at_last_gc = alloc_size; - num_allocs = 0; + gc_policy (GC_POLICY_ALLOC_FAILED, "page allocation fail"); goto retry_allocation; } } @@ -3456,21 +3496,19 @@ _ejs_gc_alloc(size_t size, EJSScanType scan_type) void _ejs_gc_add_root(ejsval* root) { - RootSetEntry* entry = (RootSetEntry*)malloc(sizeof(RootSetEntry)); - EJS_LIST_INIT(entry); - entry->root = root; - EJS_LIST_PREPEND(entry, root_set); + if (root_registry_count == root_registry_capacity) { + root_registry_capacity = root_registry_capacity ? root_registry_capacity * 2 : 512; + root_registry = realloc (root_registry, root_registry_capacity * sizeof(ejsval*)); + } + root_registry[root_registry_count++] = root; } void _ejs_gc_remove_root(ejsval* root) { - RootSetEntry *entry = NULL; - - for (entry = root_set; entry; entry = entry->next) { - if (entry->root == root) { - EJS_LIST_DETACH(entry, root_set); - free (entry); + for (int i = 0; i < root_registry_count; i++) { + if (root_registry[i] == root) { + root_registry[i] = root_registry[--root_registry_count]; return; } } From 6591e9a39f23fdfb971283cb3d045e393a9f930f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 23:38:14 -0700 Subject: [PATCH 128/146] =?UTF-8?q?eir:=20runtime-P4=20(P6.3)=20part=203?= =?UTF-8?q?=20=E2=80=94=20the=20file=20split;=20two=20stack-luck=20hazards?= =?UTF-8?q?=20flushed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ejs-gc.c (~3.7k lines) becomes six modules plus the internal contract header ejs-gc-internal.h (module map lives there): ejs-gc.c keeps the lifecycle API / allocator entry / cell free path / root registry / collection policy / GC JS object; ejs-gc-heap.c owns arenas, pages, the LOS and find_page_and_cell; ejs-gc-mark.c the worklist and the precise + conservative scanners; ejs-gc-minor.c the nursery; ejs-gc-major.c sweep + compaction + the epoch advance; ejs-gc-debug.c the PROFILE/WATCH/VERIFY/PARANOID machinery. Verified mechanically: every function body extracted from the old file diffs identical (modulo static) against the new tree — the exceptions are _ejs_gc_collect_inner (now calls root_registry_shutdown) and dead page_list_count (dropped). The duplicated tentative definition of heap_size_at_last_gc collapses to one. The TU split shifts codegen, and the stress lanes immediately caught two hazards that ACCIDENTAL conservative pins of stale stack copies had been masking (same lesson as gc-P4's bistable pin scan): - Orphaned old slot storage: growing (or dictionary-migrating) a shaped object's out-of-line slot array disconnects an OLD env cell that still holds its pre-copy slot values; the old-gen walkers (the minor's remset-overflow fallback, EJS_GC_VERIFY, EJS_GC_PARANOID) cannot tell that garbage from live cells and visit the stale slots after the referents move or die. Observed: the promoted env of the still-young rooted Reflect object, orphaned during _ejs_init, whose slot 7 aborted EJS_GC_VERIFY. Fix: shaped_retire_slots queues the retiree for one precise scan at retirement; the next minor rewrites its young refs while still live, leaving the cell inert until swept. - Paranoid checker self-scan: the dying-young-referrer report's raw C-stack sweep read the COLLECTOR's own frames (written after the conservative pin scan) and found the sweep loop's spilled cell cursor. The sweep now floors at the minor's entry frame (paranoid_stack_floor). Gates: test-eir-lowtier + stage0-3 (incl. the stage2/stage3 byte-identity fixed point) + stage1-shapes-off green; the gc stress lane (EVERY_N_ALLOC 7/31/101 x PARANOID/VERIFY/NURSERY=off/ COMPACT=off) matches the phase-entry baseline failure set exactly. test-eir was found red at phase ENTRY (11 pre-existing compiler-side failures from gc-P5's flag-off born-shaped literals; lib/ untouched here) — recorded as compiler-P1.1, not masked. Co-Authored-By: Claude Fable 5 --- runtime/BUCK | 5 + runtime/ejs-gc-debug.c | 535 ++++++ runtime/ejs-gc-heap.c | 517 ++++++ runtime/ejs-gc-internal.h | 388 +++++ runtime/ejs-gc-major.c | 539 ++++++ runtime/ejs-gc-mark.c | 622 +++++++ runtime/ejs-gc-minor.c | 695 ++++++++ runtime/ejs-gc.c | 3269 +------------------------------------ runtime/ejs-object.c | 34 +- 9 files changed, 3409 insertions(+), 3195 deletions(-) create mode 100644 runtime/ejs-gc-debug.c create mode 100644 runtime/ejs-gc-heap.c create mode 100644 runtime/ejs-gc-internal.h create mode 100644 runtime/ejs-gc-major.c create mode 100644 runtime/ejs-gc-mark.c create mode 100644 runtime/ejs-gc-minor.c diff --git a/runtime/BUCK b/runtime/BUCK index 8e86c233..029e9331 100644 --- a/runtime/BUCK +++ b/runtime/BUCK @@ -58,6 +58,11 @@ shared_sources = [ "ejs-exception.c", "ejs-function.c", "ejs-gc.c", + "ejs-gc-debug.c", + "ejs-gc-heap.c", + "ejs-gc-major.c", + "ejs-gc-mark.c", + "ejs-gc-minor.c", "ejs-generator.c", "ejs-init.c", "ejs-json.c", diff --git a/runtime/ejs-gc-debug.c b/runtime/ejs-gc-debug.c new file mode 100644 index 00000000..42882b7c --- /dev/null +++ b/runtime/ejs-gc-debug.c @@ -0,0 +1,535 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +// observability: EJS_GC_PROFILE instrumentation, EJS_GC_WATCH, +// EJS_GC_VERIFY barrier checks, EJS_GC_PARANOID heap validation, and +// the heap-stats dumps. + +#include "ejs-gc-internal.h" + +// ---- measurement instrumentation (EJS_GC_PROFILE=1) ----------- +// +// Two header bits from the gc-reserved range (57-63; see ejs-types.h — the +// shapes machinery masks its 24-bit index, so these are invisible to it): +// +// YOUNG: set at allocation, cleared on the first collection the object +// survives. "young" therefore means "allocated since the last +// collection" — exactly the population a generational nursery +// would manage, so per-cycle young-survival is THE +// number that sizes the nursery payoff. +// PINNED: set (once per cycle) when a CONSERVATIVE reference — C stack, +// spilled registers, generator stacks/contexts — hits the +// object. Under the mover these are the objects that cannot +// be evacuated this cycle; their count/bytes/sources size the +// payoff of precise JS frames and decide its ordering. +// +// The YOUNG bit is set unconditionally (an OR folded into the header +// store the allocator already does); everything else is gated on +// gc_profile so the measured path stays clean when profiling is off. +// (The YOUNG/PINNED #defines live near the top of the file — the mark +// helpers set PINNED for the compacting major.) + +EJSBool gc_profile; // EJS_GC_PROFILE (parsed in _ejs_gc_init) +struct timeval prof_start_tv; // process start, for the shutdown report + +// (the PROF_SRC_* enum lives in ejs-gc-internal.h; the scanners set +// prof_pin_source as they change source) +static const char* prof_src_names[PROF_SRC_COUNT] = { "cstack", "regs", "genstack" }; +int prof_pin_source = PROF_SRC_CSTACK; + +#define PROF_NBUCKETS 12 // ffs buckets 16B.. + [0] = LOS +static uint64_t prof_alloc_count[PROF_NBUCKETS]; +static uint64_t prof_alloc_bytes[PROF_NBUCKETS]; +static uint64_t prof_kind_count[4]; // primstr, primsym, object, closureenv +static uint64_t prof_alloc_total_count = 0; +static uint64_t prof_alloc_total_bytes = 0; +// the young population: allocations since the last collection +static uint64_t prof_young_count = 0; +static uint64_t prof_young_bytes = 0; +// per-cycle pin accounting (reset after each report) +static uint64_t prof_pin_count[PROF_SRC_COUNT]; +static uint64_t prof_pin_bytes[PROF_SRC_COUNT]; +static uint64_t prof_pin_young = 0, prof_pin_old = 0; +static uint64_t prof_pin_env_interior = 0, prof_pin_los = 0; +static uint64_t prof_collections = 0; +static uint64_t prof_total_pause_usec = 0; +const char* prof_gc_reason = "?"; + +void +profile_note_alloc(size_t size, int ffs_bucket, EJSScanType scan_type) +{ + int idx; + if (ffs_bucket > OBJECT_SIZE_HIGH_LIMIT_BITS + 1) + idx = 0; // LOS + else { + idx = ffs_bucket - OBJECT_SIZE_LOW_LIMIT_BITS; + if (idx < 1) idx = 1; + if (idx >= PROF_NBUCKETS) idx = PROF_NBUCKETS - 1; + } + prof_alloc_count[idx]++; + prof_alloc_bytes[idx] += size; + prof_alloc_total_count++; + prof_alloc_total_bytes += size; + switch (scan_type) { + case EJS_SCAN_TYPE_PRIMSTR: prof_kind_count[0]++; break; + case EJS_SCAN_TYPE_PRIMSYM: prof_kind_count[1]++; break; + case EJS_SCAN_TYPE_OBJECT: prof_kind_count[2]++; break; + case EJS_SCAN_TYPE_CLOSUREENV: prof_kind_count[3]++; break; + } + prof_young_count++; + prof_young_bytes += size; +} + +// a conservative reference hit an allocated cell: under the mover this +// object is pinned for the cycle. counted once per cycle per object +// (dedupe via the PINNED header bit), attributed to the scan source that +// found it first, split young/old, with env-interior-pointer and LOS +// sub-counts. runs BEFORE the white-check filter: a hit on an +// already-marked object still pins it. +void +profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw) +{ + GCObjectPtr base = page->page_start + (cell_idx * page->cell_size); + GCObjectHeader* h = (GCObjectHeader*)base; + if (*h & EJS_GC_HEADER_PINNED) + return; + *h |= EJS_GC_HEADER_PINNED; + prof_pin_count[prof_pin_source]++; + prof_pin_bytes[prof_pin_source] += page->cell_size; + if (*h & EJS_GC_HEADER_YOUNG) prof_pin_young++; else prof_pin_old++; + if (raw != base && (*h & EJS_SCAN_TYPE_CLOSUREENV)) prof_pin_env_interior++; + if (page->los_info) prof_pin_los++; +} + +// per-cycle results filled by profile_pre_sweep (which must run after +// marking and BEFORE the sweep frees the dead cells), printed with the +// pause by profile_report_cycle_end +static uint64_t prof_cycle_live_count, prof_cycle_live_bytes; +static uint64_t prof_cycle_ysurv_count, prof_cycle_ysurv_bytes; + +static void +profile_visit_live_cell(GCObjectHeader* h, size_t bytes) +{ + prof_cycle_live_count++; + prof_cycle_live_bytes += bytes; + if (*h & EJS_GC_HEADER_YOUNG) { + prof_cycle_ysurv_count++; + prof_cycle_ysurv_bytes += bytes; + *h &= ~EJS_GC_HEADER_YOUNG; // survived one collection: no longer young + } + // reset pins for the next cycle — but the census runs PRE-sweep and + // the compacting major reads pins POST-sweep (and clears them in its + // fixup walk); clearing here would un-pin every C-visible object + // right before evacuation decides what may move + if (!compact_enabled) + *h &= ~EJS_GC_HEADER_PINNED; +} + +void +profile_pre_sweep(void) +{ + prof_cycle_live_count = prof_cycle_live_bytes = 0; + prof_cycle_ysurv_count = prof_cycle_ysurv_bytes = 0; + for (int i = 0; i < HEAP_PAGELISTS_COUNT; i++) { + EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { + BitmapCell cell = page->page_bitmap[c]; + if (cell_is_free(cell) || cell_is_white(cell)) continue; + profile_visit_live_cell((GCObjectHeader*)p, page->cell_size); + } + }); + } + for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { + BitmapCell cell = lobj->page_info.page_bitmap[0]; + if (cell_is_free(cell) || cell_is_white(cell)) continue; + profile_visit_live_cell((GCObjectHeader*)lobj->page_info.page_start, + lobj->page_info.cell_size); + } +} + +void +profile_report_cycle_end(uint64_t pause_usec) +{ + prof_collections++; + prof_total_pause_usec += pause_usec; + double surv_pct = prof_young_bytes + ? 100.0 * (double)prof_cycle_ysurv_bytes / (double)prof_young_bytes : 0.0; + _ejs_log ("EJS_GC_PROFILE: gc#%llu reason=%s pause=%.2fms " + "live=%llu objs/%.2fMB | young allocd=%llu/%.2fMB " + "survived=%llu/%.2fMB (%.1f%% of bytes) | pins: " + "cstack=%llu/%lluKB regs=%llu/%lluKB genstack=%llu/%lluKB " + "envint=%llu los=%llu young=%llu old=%llu\n", + (unsigned long long)prof_collections, prof_gc_reason, + pause_usec / 1000.0, + (unsigned long long)prof_cycle_live_count, + prof_cycle_live_bytes / (1024.0 * 1024.0), + (unsigned long long)prof_young_count, + prof_young_bytes / (1024.0 * 1024.0), + (unsigned long long)prof_cycle_ysurv_count, + prof_cycle_ysurv_bytes / (1024.0 * 1024.0), + surv_pct, + (unsigned long long)prof_pin_count[PROF_SRC_CSTACK], + (unsigned long long)(prof_pin_bytes[PROF_SRC_CSTACK] / 1024), + (unsigned long long)prof_pin_count[PROF_SRC_REGS], + (unsigned long long)(prof_pin_bytes[PROF_SRC_REGS] / 1024), + (unsigned long long)prof_pin_count[PROF_SRC_GENSTACK], + (unsigned long long)(prof_pin_bytes[PROF_SRC_GENSTACK] / 1024), + (unsigned long long)prof_pin_env_interior, + (unsigned long long)prof_pin_los, + (unsigned long long)prof_pin_young, + (unsigned long long)prof_pin_old); + prof_young_count = prof_young_bytes = 0; + memset (prof_pin_count, 0, sizeof (prof_pin_count)); + memset (prof_pin_bytes, 0, sizeof (prof_pin_bytes)); + prof_pin_young = prof_pin_old = 0; + prof_pin_env_interior = prof_pin_los = 0; +} + +void +profile_report_shutdown(void) +{ + static EJSBool reported = EJS_FALSE; // atexit + GC_ON_SHUTDOWN may both fire + if (reported) return; + reported = EJS_TRUE; + + struct timeval now; + gettimeofday (&now, NULL); + double wall = (now.tv_sec - prof_start_tv.tv_sec) + + (now.tv_usec - prof_start_tv.tv_usec) / 1e6; + _ejs_log ("EJS_GC_PROFILE: totals: allocs=%llu bytes=%.2fMB wall=%.2fs " + "(%.1fMB/s, %.0f allocs/s) collections=%llu total-pause=%.2fms\n", + (unsigned long long)prof_alloc_total_count, + prof_alloc_total_bytes / (1024.0 * 1024.0), wall, + prof_alloc_total_bytes / (1024.0 * 1024.0) / (wall > 0 ? wall : 1), + prof_alloc_total_count / (wall > 0 ? wall : 1), + (unsigned long long)prof_collections, + prof_total_pause_usec / 1000.0); + _ejs_log ("EJS_GC_PROFILE: kinds: primstr=%llu primsym=%llu object=%llu " + "closureenv=%llu\n", + (unsigned long long)prof_kind_count[0], + (unsigned long long)prof_kind_count[1], + (unsigned long long)prof_kind_count[2], + (unsigned long long)prof_kind_count[3]); + for (int i = 1; i < PROF_NBUCKETS; i++) { + if (!prof_alloc_count[i]) continue; + _ejs_log ("EJS_GC_PROFILE: size<=%4d: %llu allocs, %.2fMB requested\n", + 1 << (OBJECT_SIZE_LOW_LIMIT_BITS + i - 1), + (unsigned long long)prof_alloc_count[i], + prof_alloc_bytes[i] / (1024.0 * 1024.0)); + } + if (prof_alloc_count[0]) + _ejs_log ("EJS_GC_PROFILE: LOS: %llu allocs, %.2fMB requested\n", + (unsigned long long)prof_alloc_count[0], + prof_alloc_bytes[0] / (1024.0 * 1024.0)); +} + +// ======================= the nursery ============================ +// +// One dedicated arena; size-class pages inside it are bump-allocated +// (the seam's per-class bump/limit cursors ARE the allocation state — +// emitted code bumps them inline). Minor GC is mostly- +// copying: conservative hits pin young cells in place (established +// FIRST), then every precise slot — root list, module exports, +// remembered-set entries, and the transitive scan through the +// slot-based Scan protocol — evacuates its young referent into the old +// gen, installs a P1 forwarding record, and is rewritten. Young pages +// end the cycle reset (no survivors) or as survivor pages (pins only — +// pins merely delay promotion). The old gen stays mark-sweep. + +// EJS_GC_WATCH=: log every lifecycle event touching the cell +// containing that address, with a C backtrace (debugging aid for the +// deterministic single-cell corruption hunt) +#include +uintptr_t gc_watch_addr; +void +gc_watch_hit(const char* what, void* p) +{ + if (EJS_LIKELY(gc_watch_addr == 0)) return; + if ((uintptr_t)p > gc_watch_addr || gc_watch_addr - (uintptr_t)p >= 256) return; + _ejs_log ("EJS_GC_WATCH: %s cell=%p (minor#%llu, in_minor=%d)\n", + what, p, (unsigned long long)heap_priv.minors, (int)in_minor_gc); + void* frames[24]; + int n = backtrace (frames, 24); + backtrace_symbols_fd (frames, n, 2); +} + +// EJS_GC_PARANOID: reverse-lookup for the sweep's death detector — when +// a young cell dies, name everything that still references it (old gen, +// LOS, roots, modules, the C stack). A hit is a missed barrier/scan of +// that owner; zero hits means the pointer was in-flight in mutator +// state the conservative scan cannot see. +static GCObjectPtr referrer_target; +static const char* referrer_ctx; +static GCObjectPtr referrer_owner; +static int referrer_hits; +// the minor collection's entry frame pointer: the raw-stack sweep's +// floor (set per minor while EJS_GC_PARANOID is on) +void** paranoid_stack_floor; +static void +referrer_check_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + if ((GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v) == referrer_target) { + GCObjectHeader oh = referrer_owner ? *(GCObjectHeader*)referrer_owner : 0; + _ejs_log ("EJS_GC_PARANOID: dying young %p still referenced: ctx=%s owner=%p (hdr %llx) slot=%p\n", + referrer_target, referrer_ctx, (void*)referrer_owner, + (unsigned long long)oh, (void*)slot); + referrer_hits++; + } +} +static void +referrer_check_object(GCObjectPtr p) +{ + GCObjectHeader header = *(GCObjectHeader*)p; + referrer_owner = p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) OP(obj,Scan)(obj, referrer_check_slot); + } else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + referrer_check_slot(&env->slots[i]); + } else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) { + referrer_check_slot(&((EJSPrimSymbol*)p)->description); + } +} +int +paranoid_report_referrers(GCObjectPtr p) +{ + referrer_target = p; + referrer_hits = 0; + referrer_ctx = "oldgen"; + old_gen_walk (referrer_check_object); + referrer_ctx = "roots"; + referrer_owner = NULL; + root_registry_foreach (referrer_check_slot); + referrer_ctx = "modules"; + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + referrer_owner = (GCObjectPtr)mod; + if (mod->ops) OP(mod,Scan)(mod, referrer_check_slot); + } + // raw C-stack sweep: any word whose payload lands inside the dying + // cell counts (boxed or raw, base or interior). Floor the sweep at + // the minor's entry frame: everything deeper is COLLECTOR frames — + // the sweep loop's own cell cursor, evacuation temporaries — written + // AFTER the conservative pin scan ran, so a hit there is the checker + // reading its own machinery, not a missed mutator reference. (The + // P6.3 file split's codegen shift surfaced exactly that self-hit.) + referrer_ctx = "stack"; + referrer_owner = NULL; + void* volatile probe; + void** stack_lo = paranoid_stack_floor ? paranoid_stack_floor : (void**)&probe; + for (void** w = stack_lo; w < (void**)stack_bottom; w++) { + uintptr_t masked = (uintptr_t)*w & 0x00007fffffffffffULL; + if ((char*)masked >= (char*)p && (char*)masked < (char*)p + 16) { + _ejs_log ("EJS_GC_PARANOID: dying young %p: raw stack word at %p = %p\n", + p, (void*)w, *w); + referrer_hits++; + } + } + return referrer_hits; +} + +// EJS_GC_VERIFY: after the remset has been processed, no live old slot +// may still reference an unforwarded, unpinned young object — such an +// edge is a missed write barrier. Report and abort. +ejsval* verify_bad_slot; +static void +verify_check_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL || !_ejs_gc_is_young(p)) return; + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(p, &cell_idx); + if (!page) return; + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + if (_ejs_gc_is_forwarded(base)) return; // will be rewritten by its recorder + if (cell_is_black(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } // pinned in place + verify_bad_slot = slot; +} +void +verify_check_object(GCObjectPtr p) +{ + GCObjectHeader header = *(GCObjectHeader*)p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) + OP(obj,Scan)(obj, verify_check_slot); + if (verify_bad_slot) { + _ejs_log ("EJS_GC_VERIFY: missed write barrier: old object %p (class %s) slot %p holds unpromoted young ref (bits %llx)\n", + p, obj->ops ? obj->ops->class_name : "", + (void*)verify_bad_slot, + (unsigned long long)verify_bad_slot->asBits); + abort(); + } + } + else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) { + verify_check_slot(&env->slots[i]); + if (verify_bad_slot) { + _ejs_log ("EJS_GC_VERIFY: missed write barrier: old env %p (hdr %llx, len %u) slot %u holds unpromoted young ref (bits %llx, target hdr %llx)\n", + p, (unsigned long long)header, env->length, i, + (unsigned long long)verify_bad_slot->asBits, + (unsigned long long)*(GCObjectHeader*)EJSVAL_TO_GCTHING_IMPL(*verify_bad_slot)); + abort(); + } + } + } + else if ((header & EJS_SCAN_TYPE_PRIMSTR) != 0) { + EJSPrimString* ps = (EJSPrimString*)p; + EJSPrimString* kids[2] = { NULL, NULL }; + switch (EJS_PRIMSTR_GET_TYPE(ps)) { + case EJS_STRING_ROPE: kids[0] = ps->data.rope.left; kids[1] = ps->data.rope.right; break; + case EJS_STRING_DEPENDENT: kids[0] = ps->data.dependent.dep; break; + default: break; + } + for (int k = 0; k < 2; k++) { + if (!kids[k] || !_ejs_gc_is_young(kids[k])) continue; + uint32_t ci; + PageInfo* pg = find_page_and_cell(kids[k], &ci); + if (!pg) continue; + if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) continue; + if (cell_is_black(pg->page_bitmap[ci])) continue; + _ejs_log ("EJS_GC_VERIFY: old primstr %p (type %d) child %d -> unpromoted young %p\n", + p, EJS_PRIMSTR_GET_TYPE(ps), k, (void*)kids[k]); + abort(); + } + } +} + +// EJS_GC_PARANOID: after every minor, walk roots + modules + all live +// heap cells and validate every traceable value: it must resolve to an +// allocated cell whose header carries exactly one scan-type bit. +// Catches corruption at the collection that minted it. +EJSBool gc_paranoid; +static const char* paranoid_ctx; +static GCObjectPtr paranoid_owner; +static void +paranoid_check_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL) return; + uint32_t ci; + PageInfo* pg = find_page_and_cell(p, &ci); + const char* why = NULL; + if (!pg) return; // static atoms/primstrings live outside the heap + if (0) why = ""; + else if (!cell_is_allocated(pg, ci, pg->page_bitmap[ci])) why = "target cell free"; + else { + GCObjectHeader h = *(GCObjectHeader*)(pg->page_start + (size_t)ci * pg->cell_size); + uint32_t st = (uint32_t)(h & 0xf); + if (st != 1 && st != 2 && st != 4 && st != 8) why = "bad scan type"; + else if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) why = "target forwarded"; + } + if (why) { + GCObjectHeader oh = paranoid_owner ? *(GCObjectHeader*)paranoid_owner : 0; + const char* ocls = "?"; + if (paranoid_owner && (oh & EJS_SCAN_TYPE_OBJECT) && ((EJSObject*)paranoid_owner)->ops) + ocls = ((EJSObject*)paranoid_owner)->ops->class_name; + else if (paranoid_owner && (oh & EJS_SCAN_TYPE_CLOSUREENV)) ocls = ""; + else if (paranoid_owner && (oh & EJS_SCAN_TYPE_PRIMSTR)) ocls = ""; + _ejs_log ("EJS_GC_PARANOID [%s]: owner %p (class %s, hdr %llx) slot %p value %llx: %s\n", + paranoid_ctx, (void*)paranoid_owner, ocls, (unsigned long long)oh, + (void*)slot, (unsigned long long)v.asBits, why); + abort(); + } +} +static void +paranoid_check_object(GCObjectPtr p) +{ + paranoid_owner = p; + GCObjectHeader header = *(GCObjectHeader*)p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) OP(obj,Scan)(obj, paranoid_check_slot); + } + else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + paranoid_check_slot(&env->slots[i]); + } + else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) + paranoid_check_slot(&((EJSPrimSymbol*)p)->description); +} +void +paranoid_sweep_check(void) +{ + paranoid_ctx = "roots"; + root_registry_foreach (paranoid_check_slot); + paranoid_ctx = "modules"; + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + if (mod->ops) OP(mod,Scan)(mod, paranoid_check_slot); + } + paranoid_ctx = "oldgen"; + old_gen_walk (paranoid_check_object); + paranoid_ctx = "young"; + for (PageInfo* page = (PageInfo*)heap_priv.young_pages.head; page; page = page->next) { + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { + EJSBool allocated = (page->young == 1) + ? young_cell_is_allocated(page, (uint32_t)c) + : !cell_is_free(page->page_bitmap[c]); + if (allocated && !_ejs_gc_is_forwarded(p)) + paranoid_check_object(p); + } + } +} + +void +_ejs_gc_dump_heap_stats() +{ + _ejs_log ("arenas:\n"); + for (int i = 0; i < num_arenas; i ++) { + _ejs_log (" [%d] - %p - %p\n", i, heap_arenas[i], heap_arenas[i]->end); + } + + for (int i = 0; i < HEAP_PAGELISTS_COUNT; i ++) { +#if gc_timings > 3 + EJSBool printed_something = EJS_FALSE; +#endif + _ejs_log ("heap_pages[%d, size %d] : %d pages\n", i, 1 << (i + OBJECT_SIZE_LOW_LIMIT_BITS), _ejs_list_length (&heap_pages[i])); +#if gc_timings > 3 + EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE (page); c ++, p += page->cell_size) { + if (cell_is_free(page->page_bitmap[c])) + continue; + GCObjectHeader* headerp = (GCObjectHeader*)p; + if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) _ejs_log ("O"); + else if ((*headerp & EJS_SCAN_TYPE_CLOSUREENV) != 0) _ejs_log ("C"); + else if ((*headerp & EJS_SCAN_TYPE_PRIMSTR) != 0) _ejs_log (((*headerp >> EJS_GC_USER_FLAGS_SHIFT) & 0x10) != 0 ? "s" : "S"); + else if ((*headerp & EJS_SCAN_TYPE_PRIMSYM) != 0) _ejs_log ("X"); + printed_something = EJS_TRUE; + } + }) + if (printed_something) + _ejs_log ("\n"); +#endif + } + + _ejs_log ("\n"); + +#if spew >= 2 + if (los_list) { + _ejs_log ("large object store: "); + for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { + GCObjectHeader* headerp = (GCObjectHeader*)lobj->page_info.page_start; + if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) _ejs_log ("O"); + else if ((*headerp & EJS_SCAN_TYPE_CLOSUREENV) != 0) _ejs_log ("C"); + else if ((*headerp & EJS_SCAN_TYPE_PRIMSTR) != 0) _ejs_log ("S"); + else if ((*headerp & EJS_SCAN_TYPE_PRIMSYM) != 0) _ejs_log ("X"); + } + _ejs_log ("\n"); + } +#endif +} diff --git a/runtime/ejs-gc-heap.c b/runtime/ejs-gc-heap.c new file mode 100644 index 00000000..3edfee82 --- /dev/null +++ b/runtime/ejs-gc-heap.c @@ -0,0 +1,517 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +// heap geography: the arena address-space reservation, arenas, page +// allocation, the large-object store and its sorted-range lookup, and +// find_page_and_cell — the pointer->cell resolution every scan uses. + +#include "ejs-gc-internal.h" + +#ifndef MAP_NORESERVE +#define MAP_NORESERVE 0 +#endif + +// GC-heap pointers get NaN-boxed into a 47-bit ejsval payload, so every +// page must map below 2^47. macOS hands out low addresses naturally; +// linux (48-bit VA, top-down mmap) does not — ask for a hinted region +// and bump the hint as regions fill. +static void* +mmap_boxable(size_t size, int prot, int extra_flags) +{ +#ifdef TARGET_LINUX + static uintptr_t hint = 0x280000000000UL; // well below 2^47 + for (int tries = 0; tries < 64; tries++) { + void* res = mmap((void*)hint, size, prot, MAP_ANON | MAP_PRIVATE | extra_flags, MAP_FD, 0); + if (res == MAP_FAILED) return NULL; + if (((uintptr_t)res + size) < (1UL << 47)) { + hint = (uintptr_t)res + size; + return res; + } + // unboxable address: drop it and try a fresh hint + munmap(res, size); + hint += 0x100000000UL; // 4GB stride + } + return NULL; +#else + void* res = mmap(NULL, size, prot, MAP_ANON | MAP_PRIVATE | extra_flags, MAP_FD, 0); + return res == MAP_FAILED ? NULL : res; +#endif +} + +static void* +alloc_from_os(size_t size) +{ + size = MAX(size, PAGE_SIZE); + void* res = mmap_boxable(size, PROT_READ | PROT_WRITE, 0); + SPEW(2, _ejs_log ("mmap = %p\n", res)); + return res; +} + +static void +release_to_os(void* ptr, size_t size) +{ + munmap (ptr, size); +} + +Arena *heap_arenas[MAX_ARENAS]; +int num_arenas; + +// ---- the arena address-space reservation (gc-P4) ---------------- +// +// All arenas are carved out of ONE contiguous reservation, mapped +// PROT_NONE at init and committed ARENA_SIZE at a time. Two payoffs, +// both for the conservative scanner: +// +// - the arena span is FIXED and disjoint from the C/LLVM heap for the +// life of the process. Before this, each arena was its own mmap: +// once a late arena landed beyond the C heap, the conservative +// prefilter span swallowed every malloc'd address, and during +// codegen MILLIONS of stack words pointing into LLVM's own +// allocations passed the prefilter into a per-word bsearch — the +// bistable 6s-vs-60s self-compile (mmap layout luck decided). +// - arena lookup is two compares + a shift into a direct map instead +// of a bsearch per candidate word. +// +// Reserved address space costs nothing until committed; nothing foreign +// can ever be mapped inside the reservation. +#define ARENA_SHIFT 25 +_Static_assert((1L << ARENA_SHIFT) == ARENA_SIZE, "ARENA_SHIFT matches ARENA_SIZE"); + +static char* arena_space; // base, ARENA_SIZE-aligned +static char* arena_space_pos; // next uncommitted chunk +static char* arena_space_end; // base + MAX_HEAP_SIZE +static Arena* arena_map[MAX_ARENAS]; // direct map: (ptr - base) >> ARENA_SHIFT + +static void +arena_space_reserve(void) +{ + size_t size = (size_t)MAX_HEAP_SIZE; + char* res = mmap_boxable(size + ARENA_SIZE, PROT_NONE, MAP_NORESERVE); + if (res == NULL) { + _ejs_log ("gc: unable to reserve the arena address space\n"); + abort(); + } + char* aligned = (char*)EJS_ALIGN(res, ARENA_SIZE); + // trim the alignment slop so the reservation is exactly the span + if (aligned > res) + munmap (res, aligned - res); + if (aligned + size < res + size + ARENA_SIZE) + munmap (aligned + size, (res + size + ARENA_SIZE) - (aligned + size)); + arena_space = aligned; + arena_space_pos = aligned; + arena_space_end = aligned + size; +} + +static inline Arena* +arena_lookup(GCObjectPtr ptr) +{ + uintptr_t off = (uintptr_t)((char*)ptr - arena_space); + if (off >= (uintptr_t)MAX_HEAP_SIZE) return NULL; + return arena_map[off >> ARENA_SHIFT]; +} + +// conservative-scan prefilter: [conservative_lo, conservative_hi) bounds +// every GC-managed address (the arena reservation + LOS blocks). The +// stack scanners reject candidate words with two compares before any +// lookup. Bounds only ever widen — stale coverage of freed LOS blocks +// is merely conservative, and a candidate inside the reservation that +// hits no committed arena rejects in the direct map. +char *conservative_lo = (char*)UINTPTR_MAX; +char *conservative_hi = NULL; +static inline void +conservative_bounds_add(void* start, size_t size) +{ + if ((char*)start < conservative_lo) conservative_lo = (char*)start; + if ((char*)start + size > conservative_hi) conservative_hi = (char*)start + size; +} + +// ---- LOS lookup: sorted range array ----------------------------- +// +// A conservative candidate that misses the arena reservation resolves +// against the LOS by binary search over a sorted array of payload +// ranges. This replaces a LOCKED LINEAR WALK of the whole LOS list — +// per stack word — which, with blocks scattered by mmap, could put +// hundreds of ms per pin scan on deep-recursion minors (found while +// gating sinking-P3; the [los_lo, los_hi) bounds prefilter landed then +// as a stopgap and remains as the quick reject). +static char *los_lo = (char*)UINTPTR_MAX; +static char *los_hi = NULL; + +EJSList heap_pages[HEAP_PAGELISTS_COUNT]; +LargeObjectInfo *los_list; + +// ---- LOS lookup: sorted range array ----------------------------- +// +// A conservative candidate that misses the arena reservation resolves +// against the LOS by binary search over a sorted array of payload +// ranges. This replaces a LOCKED LINEAR WALK of the whole LOS list — +// per stack word — which, with blocks scattered by mmap, could put +// hundreds of ms per pin scan on deep-recursion minors (found while +// gating sinking-P3; the [los_lo, los_hi) bounds prefilter landed then +// as a stopgap and remains as the quick reject). +typedef struct { + char* start; // payload: page_info.page_start + char* end; // start + cell_size + LargeObjectInfo* lobj; +} LOSRange; +static LOSRange* los_ranges; +static int los_range_count; +static int los_range_capacity; + +// index of the first range with start > ptr, in [0, count] +static int +los_range_upper_bound(char* ptr) +{ + int lo = 0, hi = los_range_count; + while (lo < hi) { + int mid = (lo + hi) / 2; + if (los_ranges[mid].start <= ptr) lo = mid + 1; + else hi = mid; + } + return lo; +} + +static void +los_ranges_add(LargeObjectInfo* lobj) +{ + char* start = (char*)lobj->page_info.page_start; + if (start < los_lo) los_lo = start; + if (start + lobj->page_info.cell_size > los_hi) + los_hi = start + lobj->page_info.cell_size; + + if (los_range_count == los_range_capacity) { + los_range_capacity = los_range_capacity ? los_range_capacity * 2 : 256; + los_ranges = realloc (los_ranges, los_range_capacity * sizeof(LOSRange)); + } + int at = los_range_upper_bound(start); + memmove (&los_ranges[at + 1], &los_ranges[at], + (los_range_count - at) * sizeof(LOSRange)); + los_ranges[at].start = start; + los_ranges[at].end = start + lobj->page_info.cell_size; + los_ranges[at].lobj = lobj; + los_range_count++; +} + +static void +los_ranges_remove(LargeObjectInfo* lobj) +{ + char* start = (char*)lobj->page_info.page_start; + int at = los_range_upper_bound(start) - 1; + EJS_ASSERT(at >= 0 && los_ranges[at].lobj == lobj); + memmove (&los_ranges[at], &los_ranges[at + 1], + (los_range_count - at - 1) * sizeof(LOSRange)); + los_range_count--; +} + +// interior pointers match: a conservative reference may be a derived +// pointer whose base value the optimizer discarded — with an exact-base +// match a large object referenced ONLY through an interior pointer +// (e.g. a flat string's data) would be collected out from under it. +// Callers canonicalize through cell_idx 0, so an interior hit marks the +// base. +static PageInfo* +los_lookup(GCObjectPtr ptr, uint32_t *cell_idx) +{ + if ((char*)ptr < los_lo || (char*)ptr >= los_hi) + return NULL; + int at = los_range_upper_bound((char*)ptr) - 1; + if (at < 0 || (char*)ptr >= los_ranges[at].end) + return NULL; + if (cell_idx) + *cell_idx = 0; + return &los_ranges[at].lobj->page_info; +} + +void* ptr_to_arena(void* ptr) { return PTR_TO_ARENA(ptr); } +void* ptr_to_arena_page_base(void* ptr) { return PTR_TO_ARENA_PAGE_BASE(ptr); } +uintptr_t ptr_to_arena_page_index(void* ptr) { return PTR_TO_ARENA_PAGE_INDEX(ptr); } +uintptr_t ptr_to_cell(void* ptr, PageInfo* info ) { return PTR_TO_CELL(ptr, info); } + +#if sanity +static void +verify_arena(Arena *arena) +{ + for (int i = 0; i < arena->num_pages; i ++) { + EJS_ASSERT (arena->pages[i] == arena->page_infos[i]->page_start); + } +} +#endif + + +Arena* +arena_new() +{ + if (arena_space_pos == arena_space_end) + return NULL; // the reservation IS the heap cap + + SPEW(1, _ejs_log ("num_arenas = %d, max = %d\n", num_arenas, MAX_ARENAS)); + + void* arena_start = arena_space_pos; + if (mprotect (arena_start, ARENA_SIZE, PROT_READ | PROT_WRITE) != 0) + return NULL; + + Arena* new_arena = arena_start; + + memset (new_arena, 0, sizeof(Arena)); + + new_arena->end = arena_start + ARENA_SIZE; + new_arena->pos = (void*)EJS_ALIGN(arena_start + sizeof(Arena), PAGE_SIZE); + + LOCK_ARENAS(); + arena_space_pos += ARENA_SIZE; + // sequential carving: heap_arenas stays address-sorted by construction + heap_arenas[num_arenas++] = new_arena; + arena_map[((char*)arena_start - arena_space) >> ARENA_SHIFT] = new_arena; + UNLOCK_ARENAS(); + + return new_arena; +} + +// one reservation holds every arena the process will ever commit; the +// conservative prefilter covers it from day one (candidates in +// uncommitted space reject via the direct map) +void +heap_space_init(void) +{ + arena_space_reserve(); + conservative_bounds_add (arena_space, (size_t)MAX_HEAP_SIZE); + + // allocate an initial arenas + for (int i = 0; i < 10; i ++) + arena_new(); +} + +static PageInfo* +alloc_page_info_from_arena(Arena *arena, void *page_data, size_t cell_size) +{ + // FIXME allocate the PageInfo and bitmap from the arena as well + PageInfo* info = (PageInfo*)calloc(1, sizeof(PageInfo) + (sizeof(BitmapCell) * PAGE_SIZE / (1<cell_size = cell_size; + info->num_cells = CELLS_OF_SIZE(cell_size); + info->num_free_cells = info->num_cells; + EJS_ASSERT(info->num_cells > 0); + info->page_start = page_data; + info->page_end = info->page_start + PAGE_SIZE; + // allocate a bitmap large enough to store any sized object so we can reuse the bitmap + info->page_bitmap = (BitmapCell*)(((char*)info) + sizeof(PageInfo)); + info->bump_ptr = info->page_start; + memset (info->page_bitmap, CELL_FREE, info->num_cells * sizeof(BitmapCell)); + return info; +} + +PageInfo* +alloc_page_from_arena(Arena *arena, size_t cell_size) +{ + void *page_data = (void*)EJS_ALIGN(arena->pos, PAGE_SIZE); + if (arena->free_pages) { + PageInfo* info = arena->free_pages; + EJS_LIST_DETACH(info, arena->free_pages); + info->cell_size = cell_size; + info->num_cells = CELLS_OF_SIZE(cell_size); + info->num_free_cells = info->num_cells; + info->bump_ptr = info->page_start; + memset (info->page_bitmap, CELL_FREE, info->num_cells * sizeof(BitmapCell)); + SPEW(3, _ejs_log ("alloc_page_from_arena from free pages for cell size %zd = %p\n", info->cell_size, info)); + return info; + } + else if (page_data < arena->end) { + PageInfo* info = alloc_page_info_from_arena (arena, page_data, cell_size); + int page_idx = arena->num_pages++; + arena->pos = page_data + PAGE_SIZE; + arena->pages[page_idx] = page_data; + arena->page_infos[page_idx] = info; + SPEW(3, _ejs_log ("alloc_page_from_arena from bump pointer for cell size %zd = %p\n", info->cell_size, info)); + return info; + } + else { + return NULL; + } +} + +PageInfo* +find_page_and_cell(GCObjectPtr ptr, uint32_t *cell_idx) +{ + // bounds prefilter: static data (atoms, module structs) and foreign + // pointers reject in two compares + if ((char*)ptr < conservative_lo || (char*)ptr >= conservative_hi) + return NULL; + + Arena* arena = arena_lookup(ptr); + if (EJS_LIKELY (arena != NULL)) { + SANITY(verify_arena(arena)); + + int page_index = PTR_TO_ARENA_PAGE_INDEX(ptr); + + if (page_index < 0 || page_index >= arena->num_pages) { + return NULL; + } + + PageInfo *page = arena->page_infos[page_index]; + + // note: interior pointers are accepted (PTR_TO_CELL divides by the + // cell size, so any pointer into a cell resolves to that cell). + // optimized code compiled by ejs keeps addresses of closure env + // slots live across calls with the env base pointer dead, so the + // conservative scan must treat interior pointers as referencing + // the containing object. + + if (cell_idx) { + *cell_idx = PTR_TO_CELL(ptr, page); + EJS_ASSERT(*cell_idx >= 0 && *cell_idx < CELLS_IN_PAGE(page)); + } + + return page; + } + + return los_lookup(ptr, cell_idx); +} + +PageInfo* +alloc_new_page(size_t cell_size) +{ + EJS_ASSERT(cell_size >= (1 << OBJECT_SIZE_LOW_LIMIT_BITS)); + SPEW(2, _ejs_log ("allocating new page for cell size %zd\n", cell_size)); + PageInfo *rv = NULL; + for (int i = 0; i < num_arenas; i ++) { + // nursery arenas serve young allocation only + if (heap_arenas[i]->is_nursery) + continue; + rv = alloc_page_from_arena(heap_arenas[i], cell_size); + if (rv) { + SPEW(2, _ejs_log (" => %p", rv)); + return rv; + } + } + + // need a new arena + SPEW(2, _ejs_log ("unable to find page in current arenas, allocating a new one")); + LOCK_ARENAS(); + Arena* arena = arena_new(); + UNLOCK_ARENAS(); + if (arena == NULL) + return NULL; + rv = alloc_page_from_arena(arena, cell_size); + SPEW(2, _ejs_log (" => %p", rv)); + return rv; +} + +// walk every live OLD cell (arena pages + LOS), calling `fn` on the +// object — the remset-overflow fallback and the EJS_GC_VERIFY check +void +old_gen_walk(void (*fn)(GCObjectPtr)) +{ + for (int a = 0; a < num_arenas; a++) { + Arena* arena = heap_arenas[a]; + if (!arena || arena->is_nursery) continue; + for (int pg = 0; pg < arena->num_pages; pg++) { + PageInfo* info = arena->page_infos[pg]; + if (!info || info->young) continue; + GCObjectPtr p = info->page_start; + for (int c = 0; c < CELLS_IN_PAGE(info); c++, p += info->cell_size) { + if (cell_is_free(info->page_bitmap[c])) continue; + fn (p); + } + } + } + for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { + if (cell_is_free(lobj->page_info.page_bitmap[0])) continue; + fn (lobj->page_info.page_start); + } +} + +size_t +calc_heap_size() +{ + size_t size = 0; + for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { + size += _ejs_list_length(&heap_pages[hp]) * PAGE_SIZE; + } + return size; +} + +GCObjectPtr +alloc_from_page(PageInfo *info) +{ + LOCK_PAGE(info); + + EJS_ASSERT (info->num_free_cells > 0); + + GCObjectPtr rv = NULL; + uint32_t cell; + + SPEW(2, _ejs_log ("allocating object from page %p (cell size %zd)\n", info, info->cell_size)); + + if (info->bump_ptr) { + rv = (GCObjectPtr)EJS_ALIGN(info->bump_ptr, 8); + cell = PTR_TO_CELL(info->bump_ptr, info); + info->bump_ptr += info->cell_size; + // check if we can service the next alloc request from the bump_ptr. if we can't, switch + // to the freelist code below. + if (info->bump_ptr + info->cell_size >= info->page_end) + info->bump_ptr = NULL; + } + else { + for (cell = 0; cell < info->num_cells; cell ++) { + if (cell_is_free(info->page_bitmap[cell])) { + rv = info->page_start + (cell * info->cell_size); + break; + } + } + } + + EJS_ASSERT (rv); + + cell_set_allocated(&info->page_bitmap[cell]); + cell_set_white(&info->page_bitmap[cell]); + + info->num_free_cells --; + + UNLOCK_PAGE(info); + + SPEW(2, _ejs_log ("allocated obj %p from page %p (cell size %zd), free cells remaining %zd\n", rv, info, info->cell_size, info->num_free_cells)); + +#if !clear_on_finalize + memset(rv, 0, info->cell_size); +#endif + return rv; +} + +GCObjectPtr +alloc_from_los(size_t size, EJSScanType scan_type) +{ + // allocate enough space for the object, our header, and our bitmap. leave room enough to align the return value + LargeObjectInfo *rv = alloc_from_os(size + sizeof(LargeObjectInfo) + 16); + if (rv == NULL) + return NULL; + + rv->page_info.page_bitmap = (char*)((void*)rv + sizeof(LargeObjectInfo)); // our bitmap comes right after the header + rv->page_info.page_start = (void*)EJS_ALIGN((void*)rv + sizeof(LargeObjectInfo) + 8, 8); + rv->page_info.cell_size = size; + rv->page_info.num_cells = 1; + rv->page_info.num_free_cells = 0; + rv->page_info.los_info = rv; + + cell_set_white(&rv->page_info.page_bitmap[0]); + cell_set_allocated(&rv->page_info.page_bitmap[0]); + + *((GCObjectHeader*)rv->page_info.page_start) = scan_type | EJS_GC_HEADER_YOUNG; + + rv->alloc_size = size; + + conservative_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); + los_ranges_add (rv); + EJS_LIST_PREPEND (rv, los_list); + //_ejs_log ("alloc_from_los returning %p\n, los_list = %p\n", rv->page_info.page_start, los_list); + return rv->page_info.page_start; +} + +void +release_to_los (LargeObjectInfo *lobj) +{ + los_ranges_remove (lobj); + // the mapping covers the header + bitmap slop too, not just the + // payload (releasing only alloc_size leaked the tail page) + release_to_os (lobj, lobj->alloc_size + sizeof(LargeObjectInfo) + 16); +} diff --git a/runtime/ejs-gc-internal.h b/runtime/ejs-gc-internal.h new file mode 100644 index 00000000..1bbb90ad --- /dev/null +++ b/runtime/ejs-gc-internal.h @@ -0,0 +1,388 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +// The collector's internal contract (runtime-P4 / P6.3 file split). +// Nothing here is API — ejs-gc.h is the public surface. Module map: +// +// ejs-gc.c lifecycle API, allocator entry, cell free path, +// root registry, collection policy, GC JS object +// ejs-gc-heap.c arena reservation, arenas/pages, LOS + lookup, +// find_page_and_cell +// ejs-gc-mark.c worklist, precise + conservative scanners, +// gc-frame skip, generator stack bookkeeping +// ejs-gc-minor.c the nursery and the mostly-copying minor +// ejs-gc-major.c full collections: mark/sweep orchestration, +// major compaction, the epoch advance +// ejs-gc-debug.c EJS_GC_PROFILE / WATCH / VERIFY / PARANOID + +#ifndef _ejs_gc_internal_h_ +#define _ejs_gc_internal_h_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ejs-gc.h" +#include "ejs-function.h" +#include "ejs-generator.h" +#include "ejs-arguments.h" +#include "ejs-shapes.h" +#include "ejs-value.h" +#include "ejs-string.h" +#include "ejs-symbol.h" +#include "ejs-error.h" +#include "ejs-ops.h" +#include "ejsval.h" +#include "ejs-module.h" + +#define clear_on_finalize 0 + +#define spew 0 +#define sanity 0 +#define gc_timings 0 + +#if spew +static int _ejs_spew_level = (spew); +#define SPEW(level,x) do { if ((level) < _ejs_spew_level) { x; } } while (0) +#else +#define SPEW(level,x) +#endif +#if sanity +#define SANITY(x) x +#else +#define SANITY(x) +#endif + +#if EJS_BITS_PER_WORD == 64 +// 2GB +#define MAX_HEAP_SIZE (2LL * 1024LL * 1024LL * 1024LL) +#else +// 128MB +#define MAX_HEAP_SIZE (128LL * 1024LL * 1024LL) +#endif + +#ifndef PAGE_SIZE +#define PAGE_SIZE 4096 +#endif + +#define USABLE_PAGE_SIZE PAGE_SIZE + +#define CELLS_OF_SIZE(size) (USABLE_PAGE_SIZE / (size)) +#define CELLS_IN_PAGE(page) CELLS_OF_SIZE((page)->cell_size) + +// arenas are reserved in ARENA_PAGES * PAGE_SIZE chunks. ARENA_PAGES=8192 gives us an arena size of 32MB +#define ARENA_PAGES 8192 +#define ARENA_SIZE (PAGE_SIZE*ARENA_PAGES) + +#define PTR_TO_ARENA_MASK (uintptr_t)(~(ARENA_SIZE-1)) + +// turn a random pointer into an arena pointer +#define PTR_TO_ARENA(ptr) ((void*)((uintptr_t)(ptr) & PTR_TO_ARENA_MASK)) +#define PTR_TO_ARENA_PAGE_BASE(ptr) ((void*)EJS_ALIGN(PTR_TO_ARENA(ptr) + sizeof(Arena), PAGE_SIZE)) +#define PTR_TO_ARENA_PAGE_INDEX(ptr) ((((uintptr_t)(ptr) & ~PTR_TO_ARENA_MASK) - ((uintptr_t)PTR_TO_ARENA_PAGE_BASE(ptr) & ~PTR_TO_ARENA_MASK)) / PAGE_SIZE) + +#define PTR_TO_CELL(ptr,info) (((char*)(ptr) - (char*)(info)->page_start) / (info)->cell_size) + +#define IS_ALIGNED_TO(v,a) (((uintptr_t)(v) & ((a)-1)) == 0) +#define ALLOC_ALIGN 8 +#define EJS_ALIGN(v,a) (((uintptr_t)(v) + (a)-1) & ~((a)-1)) +#define IS_ALLOC_ALIGNED(v) IS_ALIGNED_TO(v, ALLOC_ALIGN) + +#if IOS || OSX +#include +#define MAP_FD VM_MAKE_TAG (VM_MEMORY_APPLICATION_SPECIFIC_16) +#else +#define MAP_FD -1 +#endif + +// two header bits from the gc-reserved range (57-63; see ejs-types.h). +// YOUNG: set at allocation, cleared on first survival (profiling) or +// promotion (the nursery). PINNED: set on every conservative hit during +// a full collection — the compacting major must sweep that cell in +// place; cleared by compaction's fixup walk (or the profile census when +// compaction is off). +#define EJS_GC_HEADER_YOUNG (1ULL << 57) +#define EJS_GC_HEADER_PINNED (1ULL << 58) + +#if CONCURRENT +#error "not implemented" +#else +#define LOCK_PAGE(info) +#define UNLOCK_PAGE(info) +#define LOCK_GC() +#define UNLOCK_GC() +#define LOCK_ARENAS() +#define UNLOCK_ARENAS() +#endif + +typedef struct _PageInfo PageInfo; +typedef struct _LargeObjectInfo LargeObjectInfo; + +typedef struct _Arena { + void* end; + void* pos; + PageInfo* free_pages; + void* pages[ARENA_PAGES]; + PageInfo* page_infos[ARENA_PAGES]; + int num_pages; + // the nursery is a dedicated arena so "is young" is a + // range check; old-gen page allocation skips nursery arenas + EJSBool is_nursery; +} Arena; + +#define MAX_ARENAS (MAX_HEAP_SIZE / ARENA_SIZE) + +// ---- the cell lifecycle ---------------------------------------- +// +// One bitmap byte per page cell. A cell is FREE or ALLOCATED, and an +// allocated cell carries a tri-color mark; every state predicate and +// transition lives in this block, and the encoding is private to it. +// +// White/black are EPOCH-RELATIVE: the color bits hold GRAY or the +// parity of the mark epoch the cell was last colored in. color == +// (mark_epoch & 1) is black (marked this epoch); the complement is +// white. mark_epoch_advance() — called at exactly one site, the end +// of a full collection — thus turns every surviving black cell white +// in O(1) without touching a bitmap. (The old collector expressed +// the same aging as a white_mask/black_mask swap mutated at the same +// site; the epoch is that flip made explicit and single-owner.) + +typedef char BitmapCell; + +#define CELL_COLOR_MASK 0x03 +#define CELL_GRAY 0x02 +#define CELL_FREE 0x04 // cell is in the free list for this page + +extern unsigned int mark_epoch; // parity 1 at startup: black starts at color 1 + +static inline BitmapCell cell_black_color(void) { return (BitmapCell)(mark_epoch & 1); } +static inline BitmapCell cell_white_color(void) { return (BitmapCell)((mark_epoch & 1) ^ 1); } + +// the ONLY place the white/black meaning ever changes +static inline void +mark_epoch_advance(void) +{ + mark_epoch++; +} + +static inline EJSBool cell_is_free (BitmapCell c) { return (c & CELL_FREE) == CELL_FREE; } +static inline EJSBool cell_is_gray (BitmapCell c) { return (c & CELL_COLOR_MASK) == CELL_GRAY; } +static inline EJSBool cell_is_white(BitmapCell c) { return (c & CELL_COLOR_MASK) == cell_white_color(); } +static inline EJSBool cell_is_black(BitmapCell c) { return (c & CELL_COLOR_MASK) == cell_black_color(); } + +static inline void cell_set_gray (BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | CELL_GRAY); } +static inline void cell_set_white(BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | cell_white_color()); } +static inline void cell_set_black(BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | cell_black_color()); } +static inline void cell_set_free (BitmapCell* c) { *c = CELL_FREE; } +static inline void cell_set_allocated(BitmapCell* c) { *c = (BitmapCell)(*c & ~CELL_FREE); } + +struct _PageInfo { + EJS_LIST_HEADER(struct _PageInfo); + void* bump_ptr; + void* page_start; + void* page_end; + BitmapCell* page_bitmap; + LargeObjectInfo *los_info; + int32_t cell_size; + int16_t num_cells; + int16_t num_free_cells; + // 0 = old gen; 1 = active young page (bump-allocated, + // allocated-ness = below bump); 2 = young survivor page (holds + // pinned young objects, bitmap-authoritative, no further bumping) + uint8_t young; +}; + +struct _LargeObjectInfo { + EJS_LIST_HEADER(struct _LargeObjectInfo); + size_t alloc_size; + PageInfo page_info; +}; + +#define OBJECT_SIZE_LOW_LIMIT_BITS 4 // smallest object we'll allocate (1<<4 = 16) +#define OBJECT_SIZE_HIGH_LIMIT_BITS 8 // max object size for the non-LOS allocator = 256 + +// heap_pages is indexed by ffs(cell_size) - OBJECT_SIZE_LOW_LIMIT_BITS, +// i.e. 16B -> 1 .. 256B -> 5 ([0] is unused); +2 covers the inclusive +// top class. Until gc-P5 the ffs comparisons routed 256-byte +// cells to the LOS (ffs(256) = 9 > HIGH_LIMIT_BITS), so the top class +// existed only on paper — the pre-gc-P4 LOS had a linear lookup that +// made large cell populations quadratic to mark. With the LOS bsearch +// and the direct arena map in, the class is enabled: single-cell shaped +// objects up to the 14-field cap (32+16+112 = 160) and >14-slot envs +// now take pages, not the LOS. +#define HEAP_PAGELISTS_COUNT (OBJECT_SIZE_HIGH_LIMIT_BITS - OBJECT_SIZE_LOW_LIMIT_BITS) + 2 + +// allocated-ness of a young ACTIVE page's cell is the bump rule: +// everything below the bump cursor is an object, the bitmap holds only +// collection colors +static inline EJSBool +young_cell_is_allocated(PageInfo* page, uint32_t cell_idx) +{ + return page->page_start + (size_t)cell_idx * page->cell_size < page->bump_ptr; +} + +// allocated-ness of a cell: old pages answer from the bitmap; ACTIVE +// young pages (young==1) answer from the bump rule; SURVIVOR young +// pages (young==2) are bitmap-authoritative again (their pinned cells +// were re-marked at minor sweep) +static inline EJSBool +cell_is_allocated(PageInfo* page, uint32_t cell_idx, BitmapCell cell) +{ + if (page->young == 1) return young_cell_is_allocated(page, cell_idx); + return !cell_is_free(cell); +} + +// rewrite an ejsval's payload in place, preserving its NaN-box tag +static inline void +rewrite_slot_payload(ejsval* slot, GCObjectPtr to) +{ + slot->asBits = (slot->asBits & ~EJSVAL_PAYLOAD_MASK) + | ((uint64_t)(uintptr_t)to & EJSVAL_PAYLOAD_MASK); +} + +// the private half of the (single) isolate's heap context (_ejs_heap +// in ejs-gc.h is the emitted-code seam; this is everything else) +typedef struct { + Arena* nursery_arena; + PageInfo* young_current[EJS_GC_NUM_SIZE_CLASSES]; + EJSList young_pages; // all young pages not currently being bumped + EJSBool verify; // EJS_GC_VERIFY: old-gen barrier-coverage check per minor + size_t young_alloced; // bytes of young pages handed out this cycle + size_t young_budget; // minor-collection trigger (EJS_GC_NURSERY_BUDGET) + // minor worklist (objects whose slots still need processing) + GCObjectPtr* wl; + int wl_count, wl_cap; + // the remset's second buffer. A minor collection SWAPS buffers up + // front and processes the snapshot; slots whose referent stays young + // (pinned) re-append into the live buffer — old→young edges CARRY + // across cycles for as long as the target remains in the nursery. + ejsval** remset_other; + // stats (reported under EJS_GC_PROFILE) + uint64_t minors, minor_usec_total, minor_usec_max; + uint64_t promoted_objs, promoted_bytes, minor_pins, remset_peak, overflow_minors; +} EJSHeapPriv; + +// conservative-pin attribution for EJS_GC_PROFILE +enum { + PROF_SRC_CSTACK = 0, // conservative C-stack ranges (incl. suspended segments) + PROF_SRC_REGS = 1, // spilled register file + PROF_SRC_GENSTACK = 2, // suspended generator stacks + saved ucontexts + PROF_SRC_COUNT +}; + +// ---- the collection policy (ejs-gc.c) --------------------------- +typedef enum { + GC_POLICY_YOUNG_ALLOC, // a nursery allocation is about to run + GC_POLICY_OLD_ALLOC, // an old-gen/LOS allocation is about to run + GC_POLICY_AFTER_MINOR, // a minor just retired; promotions grew the old gen + GC_POLICY_ALLOC_FAILED // allocator out of memory: forced full +} GCPolicyEvent; + +void gc_policy(GCPolicyEvent ev, const char* reason); + +// ---- shared state ---------------------------------------------- + +// mode/knob flags +extern EJSBool gc_disabled; // EJS_GC_DISABLE (ejs-gc.c) +extern int collect_every_alloc; // EJS_GC_EVERY_N_ALLOC (ejs-gc.c) +extern EJSBool compact_enabled; // EJS_GC_COMPACT (ejs-gc.c) +extern EJSBool nursery_enabled; // EJS_GC_NURSERY (ejs-gc-minor.c) +extern EJSBool gc_profile; // EJS_GC_PROFILE (ejs-gc-debug.c) +extern EJSBool gc_paranoid; // EJS_GC_PARANOID (ejs-gc-debug.c) +extern uintptr_t gc_watch_addr; // EJS_GC_WATCH (ejs-gc-debug.c) + +// allocator accounting (ejs-gc.c) +extern size_t alloc_size; // old-gen bytes ever allocated (promotions included) +extern size_t alloc_size_at_last_gc; +extern int num_allocs; // the every-N stress counter +extern int total_allocs; + +// heap geography (ejs-gc-heap.c) +extern EJSList heap_pages[]; +extern LargeObjectInfo *los_list; +extern Arena *heap_arenas[]; +extern int num_arenas; +extern char *conservative_lo; // conservative-scan prefilter bounds +extern char *conservative_hi; + +// collection state +extern EJSBool in_minor_gc; // (ejs-gc-minor.c) +extern EJSHeapPriv heap_priv; // (ejs-gc-minor.c) +extern EJSBool minor_scan_saw_young; // (ejs-gc-minor.c) set when a scan leaves a pinned-young referent +extern size_t heap_size_at_last_gc; // (ejs-gc-major.c) post-sweep footprint, drives full_gc_trigger +extern int num_roots; // (ejs-gc-major.c) per-cycle census counter +extern GCObjectPtr *stack_bottom; // (ejs-gc-mark.c) + +// profiling state written outside ejs-gc-debug.c +extern struct timeval prof_start_tv; +extern int prof_pin_source; // PROF_SRC_*, set by the scanners +extern const char* prof_gc_reason; + +// ---- cross-module functions ------------------------------------ + +// ejs-gc.c +void root_registry_foreach(void (*fn)(ejsval*)); +void root_registry_shutdown(void); +void finalize_object(GCObjectPtr p); +void _ejs_finalize_obj(GCObjectPtr ptr, Arena* arena, PageInfo* info, uint32_t cell_idx); + +// ejs-gc-heap.c +void heap_space_init(void); +Arena* arena_new(void); +PageInfo* alloc_page_from_arena(Arena *arena, size_t cell_size); +PageInfo* find_page_and_cell(GCObjectPtr ptr, uint32_t *cell_idx); +PageInfo* alloc_new_page(size_t cell_size); +GCObjectPtr alloc_from_page(PageInfo *info); +GCObjectPtr alloc_from_los(size_t size, EJSScanType scan_type); +void release_to_los(LargeObjectInfo *lobj); +void old_gen_walk(void (*fn)(GCObjectPtr)); +size_t calc_heap_size(void); + +// ejs-gc-mark.c +void _ejs_gc_worklist_init(void); +void mark_thread_stack(void); +void mark_generator_stacks(void); +void mark_from_roots(void); +void mark_from_modules(void); +void mark_object_root(GCObjectPtr ptr); +void process_worklist(void); +void walk_gc_frames(void (*slot_fn)(ejsval*)); +void set_frame_skip_chain(void* chain_head); +void clear_frame_skip(void); + +// ejs-gc-minor.c +void _ejs_gc_minor_collect(const char* reason); +GCObjectPtr young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type); +void young_normalize_for_full_gc(void); +void young_page_freed(PageInfo* info, Arena* arena); +void nursery_init(void); +void remset_rebuild_after_full_gc(void); +void minor_conservative_hit(PageInfo* page, uint32_t cell_idx); +void minor_wl_push(GCObjectPtr p); +void minor_fixup_evacuated(GCObjectPtr from, GCObjectPtr to, size_t cell_size); + +// ejs-gc-major.c +void _ejs_gc_collect_inner(EJSBool shutting_down); + +// ejs-gc-debug.c +void profile_note_alloc(size_t size, int ffs_bucket, EJSScanType scan_type); +void profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw); +void profile_pre_sweep(void); +void profile_report_cycle_end(uint64_t pause_usec); +void profile_report_shutdown(void); +void gc_watch_hit(const char* what, void* p); +void paranoid_sweep_check(void); +int paranoid_report_referrers(GCObjectPtr p); +extern void** paranoid_stack_floor; // raw-stack sweep floor, set at minor entry +void verify_check_object(GCObjectPtr p); +extern ejsval* verify_bad_slot; +void _ejs_gc_dump_heap_stats(void); + +#endif /* _ejs_gc_internal_h_ */ diff --git a/runtime/ejs-gc-major.c b/runtime/ejs-gc-major.c new file mode 100644 index 00000000..abde799f --- /dev/null +++ b/runtime/ejs-gc-major.c @@ -0,0 +1,539 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +// full collections: mark orchestration, the sweep, the mostly-copying +// major compaction (gc-P4), and the post-cycle epoch advance. + +#include "ejs-gc-internal.h" + +int num_roots = 0; +static int white_objs = 0; +static int large_objs = 0; +static int total_objs = 0; + +static void +sweep_heap() +{ +#if spew + int pages_visited = 0; + int pages_skipped = 0; +#endif + + // sweep the entire heap, freeing white nodes + for (int a = 0, e = num_arenas; a < e; a ++) { + Arena* arena = heap_arenas[a]; + + if (!arena) + continue; + + for (int p = 0, pe = arena->num_pages; p < pe; p++) { + PageInfo *info = arena->page_infos[p]; + + if (info->num_free_cells == info->num_cells) { +#if spew + pages_skipped++; +#endif + } + else { +#if spew + pages_visited ++; +#endif + + for (int c = 0, ce = info->num_cells; c < ce; c ++) { + BitmapCell cell = info->page_bitmap[c]; + + if (cell_is_free(cell)) + continue; + + total_objs++; + + if (cell_is_white(cell)) { + white_objs++; + + GCObjectPtr gcobj = (GCObjectPtr)(info->page_start + c * info->cell_size); + _ejs_finalize_obj(gcobj, arena, info, c); + } + } + } + } + } + + // sweep the large object store + SPEW(2, _ejs_log ("sweeping los: ")); + LargeObjectInfo *lobj = los_list; + while (lobj) { + large_objs ++; + PageInfo *info = &lobj->page_info; + BitmapCell cell = info->page_bitmap[0]; + LargeObjectInfo *next = lobj->next; + if (cell_is_white(cell)) { + // SPEW(2, { _ejs_log ("l"); fflush(stderr); }); + white_objs++; + + EJS_LIST_DETACH(lobj, los_list); + _ejs_finalize_obj(info->page_start, NULL, info, 0); + } + else { + // SPEW(2, { _ejs_log ("L"); fflush(stderr); }); + } + lobj = next; + } + SPEW(2, { _ejs_log ("\n"); }); +} + +// ============== mostly-copying major compaction (gc-P4) =================== +// +// Mark-sweep never shrinks: live old-gen cells sit wherever history put +// them and sparse pages hold whole pages hostage for a cell or two. +// After the sweep, this pass evacuates the live UNPINNED cells of the +// sparsest pages of each size class into the free space of the denser +// ones, rewrites every reference through the P1 forwarding records, and +// returns the emptied pages to their arenas — the heap actually shrinks, +// and the proportional growth target then adapts downward. +// +// Pinned cells sweep in place, exactly like the minor's young pins: +// conservative hits (C stack, spilled registers, generator stacks) set +// PINNED during marking, and every registered generator object pins too +// (the registry is an intrusive list of raw pointers). LOS objects +// never move. EJS_GC_COMPACT=off restores plain mark-sweep for A/B and +// differential runs. +static uint64_t compact_moved_objs, compact_moved_bytes, compact_freed_pages; + +static void +compact_fixup_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL) return; + // boxed payloads are object bases, and statics outside the heap have + // headers too, so the forwarded-bit read is always safe + if (_ejs_gc_is_forwarded(p)) + rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(p)); +} + +static void +compact_fixup_primstr_child(EJSPrimString** childp) +{ + GCObjectPtr p = (GCObjectPtr)*childp; + if (p && _ejs_gc_is_forwarded(p)) + *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(p); +} + +static void +compact_fixup_object(GCObjectPtr p) +{ + GCObjectHeader* h = (GCObjectHeader*)p; + if (*h & EJS_GC_HEADER_FORWARDED) + return; // an evacuated source; its copy is walked on its own page + *h &= ~EJS_GC_HEADER_PINNED; // pins are per-cycle + if ((*h & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) + OP(obj,Scan)(obj, compact_fixup_slot); + } + else if ((*h & EJS_SCAN_TYPE_PRIMSTR) != 0) { + EJSPrimString* ps = (EJSPrimString*)p; + switch (EJS_PRIMSTR_GET_TYPE(ps)) { + case EJS_STRING_ROPE: + compact_fixup_primstr_child(&ps->data.rope.left); + compact_fixup_primstr_child(&ps->data.rope.right); + break; + case EJS_STRING_DEPENDENT: + compact_fixup_primstr_child(&ps->data.dependent.dep); + break; + case EJS_STRING_FLAT: + break; + } + } + else if ((*h & EJS_SCAN_TYPE_PRIMSYM) != 0) + compact_fixup_slot(&((EJSPrimSymbol*)p)->description); + else if ((*h & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + compact_fixup_slot(&env->slots[i]); + } +} + +static EJSBool +compact_page_has_pins(PageInfo* pg) +{ + GCObjectPtr p = pg->page_start; + for (int c = 0; c < pg->num_cells; c++, p += pg->cell_size) + if (!cell_is_free(pg->page_bitmap[c]) + && (*(GCObjectHeader*)p & EJS_GC_HEADER_PINNED)) + return EJS_TRUE; + return EJS_FALSE; +} + +// destination cell in `bucket`: first page (from the cursor on) with +// free capacity. Sources were detached from the bucket list before +// evacuation, so every listed page qualifies. The selection accounting +// guarantees capacity; running dry is a bug. +static GCObjectPtr +compact_alloc_dest(int bucket, PageInfo** cursor, PageInfo** dest_page) +{ + PageInfo* pg = *cursor ? *cursor : (PageInfo*)heap_pages[bucket].head; + while (pg && !pg->num_free_cells) + pg = pg->next; + if (!pg) { + _ejs_log ("GC BUG: compaction ran out of destination space (bucket %d)\n", bucket); + abort(); + } + *cursor = pg; + *dest_page = pg; + return alloc_from_page(pg); +} + +static void +compact_evacuate_page(int bucket, PageInfo* pg, PageInfo** cursor) +{ + GCObjectPtr from = pg->page_start; + for (int c = 0; c < pg->num_cells; c++, from += pg->cell_size) { + if (cell_is_free(pg->page_bitmap[c])) + continue; + PageInfo* dest_page; + GCObjectPtr to = compact_alloc_dest(bucket, cursor, &dest_page); + memcpy (to, from, pg->cell_size); + // the copy is live THIS cycle: keep it marked so the coming + // color flip turns it white with every other survivor + cell_set_black(&dest_page->page_bitmap[PTR_TO_CELL(to, dest_page)]); + minor_fixup_evacuated(from, to, pg->cell_size); + _ejs_gc_forward(from, to); + gc_watch_hit ("compact-evacuate-from", from); + compact_moved_objs++; + compact_moved_bytes += pg->cell_size; + } +} + +typedef struct { PageInfo* page; int live; } CompactPageStat; + +static int +compact_stat_cmp(const void* a, const void* b) +{ + return ((const CompactPageStat*)a)->live - ((const CompactPageStat*)b)->live; +} + +static void +compact_old_gen(void) +{ + // every registered generator pins: the registry reaches them through + // raw intrusive pointers (reg_next/reg_prev), and their machine + // state is re-scanned conservatively by their specops + for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) + *(GCObjectHeader*)g |= EJS_GC_HEADER_PINNED; + + uint64_t moved_before = compact_moved_objs; + uint64_t freed_before = compact_freed_pages; + + EJSList evac_pages; + memset (&evac_pages, 0, sizeof(evac_pages)); + + // 1. selection + evacuation, per size class: sparse-first, evacuate + // while the rest of the class has room + for (int bucket = 0; bucket < HEAP_PAGELISTS_COUNT; bucket++) { + int count = 0; + for (PageInfo* pg = (PageInfo*)heap_pages[bucket].head; pg; pg = pg->next) + count++; + if (count < 2) + continue; + + CompactPageStat* stats = (CompactPageStat*)malloc (count * sizeof(CompactPageStat)); + size_t total_free = 0; + int n = 0; + for (PageInfo* pg = (PageInfo*)heap_pages[bucket].head; pg; pg = pg->next) { + stats[n].page = pg; + stats[n].live = pg->num_cells - pg->num_free_cells; + n++; + total_free += pg->num_free_cells; + } + qsort (stats, n, sizeof(CompactPageStat), compact_stat_cmp); + + // choose the COMPLETE source set first, sparse-first: a page + // accepted as a source leaves the destination pool, and the + // remaining pool must hold every already-accepted live cell + // plus this page's. (Selecting and evacuating in one pass let + // an early DESTINATION later be picked as a source via its + // stale live count — evacuating more cells than the accounting + // reserved space for.) + size_t dest_free = total_free; + size_t src_live = 0; + EJSList src_pages; + memset (&src_pages, 0, sizeof(src_pages)); + for (int i = 0; i < n; i++) { + PageInfo* pg = stats[i].page; + size_t live = (size_t)stats[i].live; + if (live == 0) + continue; // the sweep freelists empties; belt only + if (dest_free - pg->num_free_cells < src_live + live) + break; // the sparsest candidate doesn't fit; denser ones won't either + if (compact_page_has_pins(pg)) + continue; // pinned cells sweep in place; the page stays a destination + _ejs_list_detach_node (&heap_pages[bucket], (EJSListNode*)pg); + _ejs_list_append_node (&src_pages, (EJSListNode*)pg); + dest_free -= pg->num_free_cells; + src_live += live; + } + + // sources are off the bucket list now: every listed page is a + // pure destination, so the cursor can walk it freely + PageInfo* cursor = NULL; + PageInfo* src; + while ((src = (PageInfo*)src_pages.head) != NULL) { + _ejs_list_detach_node (&src_pages, (EJSListNode*)src); + compact_evacuate_page (bucket, src, &cursor); + _ejs_list_append_node (&evac_pages, (EJSListNode*)src); + } + free (stats); + } + + // 2. fixup: rewrite every reference that can name a moved cell, and + // clear the cycle's pins while walking the live set. Runs even + // when nothing was evacuated — the pins must reset either way. + root_registry_foreach (compact_fixup_slot); + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + if (mod->ops) + OP(mod,Scan)(mod, compact_fixup_slot); + } + // gc-frame slots' referents were all conservatively pinned (full GC + // never skips frame records), so these rewrites are no-ops today; + // walked anyway so precision changes can't silently break this pass + walk_gc_frames(compact_fixup_slot); + for (int i = 0; i < _ejs_heap.remset_count; i++) { + GCObjectPtr o = (GCObjectPtr)_ejs_heap.remset[i]; + if (_ejs_gc_is_forwarded(o)) + _ejs_heap.remset[i] = _ejs_gc_forwarding_addr(o); + } + old_gen_walk (compact_fixup_object); // old pages (sources skip via FORWARDED) + LOS + for (PageInfo* pg = (PageInfo*)heap_priv.young_pages.head; pg; pg = pg->next) { + GCObjectPtr p = pg->page_start; + for (int c = 0; c < CELLS_IN_PAGE(pg); c++, p += pg->cell_size) + if (!cell_is_free(pg->page_bitmap[c])) + compact_fixup_object(p); + } + + // 3. release the sources: nothing reads the forwarding records + // anymore; the pages go back to their arenas. No finalizers run — + // the objects live on at their new addresses. + PageInfo* pg; + while ((pg = (PageInfo*)evac_pages.head) != NULL) { + _ejs_list_detach_node (&evac_pages, (EJSListNode*)pg); + memset (pg->page_start, 0xa7, PAGE_SIZE); // 0xa7: FORWARDED must stay clear in poison + memset (pg->page_bitmap, CELL_FREE, pg->num_cells * sizeof(BitmapCell)); + pg->num_free_cells = pg->num_cells; + pg->bump_ptr = pg->page_start; + Arena* arena = (Arena*)PTR_TO_ARENA(pg->page_start); + EJS_LIST_PREPEND (pg, arena->free_pages); + compact_freed_pages++; + } + + if (gc_profile) + _ejs_log ("EJS_GC_PROFILE: compact: moved=%llu freed-pages=%llu\n", + (unsigned long long)(compact_moved_objs - moved_before), + (unsigned long long)(compact_freed_pages - freed_before)); +} +// ============== end mostly-copying major compaction ====================== + +void +_ejs_gc_collect_inner(EJSBool shutting_down) +{ +#if gc_timings > 1 + struct timeval tvbefore, tvafter; +#endif + + // very simple stop the world collector + SPEW(1, _ejs_log ("collection started\n")); + + num_roots = 0; + white_objs = 0; + large_objs = 0; + total_objs = 0; + + // full collections need young pages in bitmap-authoritative + // form (active bump pages have no valid FREE bits or counts) + young_normalize_for_full_gc(); + +#if gc_timings > 1 + gettimeofday (&tvbefore, NULL); +#endif + + struct timeval prof_tv_begin, prof_tv_end; + if (gc_profile) + gettimeofday (&prof_tv_begin, NULL); + + struct timeval fg[8]; + if (!shutting_down) { + gettimeofday (&fg[0], NULL); + mark_from_roots(); + + total_objs = num_roots; + + mark_from_modules(); + gettimeofday (&fg[1], NULL); + + mark_thread_stack(); + + mark_generator_stacks(); + gettimeofday (&fg[2], NULL); + + // dirty objects await their deferred minor scan and may + // hold the only reference to young data — root them + for (int i = 0; i < _ejs_heap.remset_count; i++) + mark_object_root((GCObjectPtr)_ejs_heap.remset[i]); + gettimeofday (&fg[3], NULL); + + process_worklist(); + gettimeofday (&fg[4], NULL); + + // survival + pin census must walk the heap BEFORE the + // sweep frees the white cells + if (gc_profile) + profile_pre_sweep(); + gettimeofday (&fg[5], NULL); + if (gc_profile) { +#define FGUS(a,b) ((long long)(((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec))) + _ejs_log ("EJS_GC_PROFILE: full-gc phases: roots+modules=%lldus stacks=%lldus remset-roots=%lldus (remset=%d) worklist=%lldus census=%lldus\n", + FGUS(fg[0],fg[1]), FGUS(fg[1],fg[2]), FGUS(fg[2],fg[3]), + _ejs_heap.remset_count, FGUS(fg[3],fg[4]), FGUS(fg[4],fg[5])); +#undef FGUS + } + } + +#if gc_timings > 1 + gettimeofday (&tvafter, NULL); +#endif + +#if gc_timings > 1 + { + uint64_t usec_before = tvbefore.tv_sec * 1000000 + tvbefore.tv_usec; + uint64_t usec_after = tvafter.tv_sec * 1000000 + tvafter.tv_usec; + + _ejs_log ("gc scan took %gms\n", (usec_after - usec_before) / 1000.0); + } +#endif + +#if gc_timings > 1 + gettimeofday (&tvbefore, NULL); +#endif + + sweep_heap(); + + // mostly-copying: evacuate the sparse pages' unpinned live + // cells, rewrite every reference, return emptied pages to their + // arenas. (Skipped on the shutdown collection — nothing left to + // move for.) + if (compact_enabled && !shutting_down) + compact_old_gen(); + + // the remembered state may dangle into cells this sweep just + // freed — rebuild it from the live old gen + if (!shutting_down) + remset_rebuild_after_full_gc(); + + if (gc_profile && !shutting_down) { + gettimeofday (&prof_tv_end, NULL); + uint64_t usec = (prof_tv_end.tv_sec - prof_tv_begin.tv_sec) * 1000000ULL + + (prof_tv_end.tv_usec - prof_tv_begin.tv_usec); + profile_report_cycle_end (usec); + } + +#if gc_timings > 1 + { + gettimeofday (&tvafter, NULL); + } +#endif + +#if gc_timings > 1 + { + uint64_t usec_before = tvbefore.tv_sec * 1000000 + tvbefore.tv_usec; + uint64_t usec_after = tvafter.tv_sec * 1000000 + tvafter.tv_usec; + + _ejs_log ("gc sweep took %gms\n", (usec_after - usec_before) / 1000.0); + } +#endif + +#if gc_timings > 1 + _ejs_log ("_ejs_gc_collect stats:\n"); + _ejs_log (" num_roots: %d\n", num_roots); + _ejs_log (" total objects: %d\n", total_objs); + _ejs_log (" num large objects: %d\n", large_objs); + _ejs_log (" garbage objects: %d\n", white_objs); +#endif + + // age the survivors: this epoch's black is next epoch's white + mark_epoch_advance(); + + if (shutting_down) { + root_registry_shutdown(); + + SPEW(1, _ejs_log ("final gc page statistics:\n"); + for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { + int len = 0; + + EJS_LIST_FOREACH (&heap_pages[hp], PageInfo, page, { + len ++; + }); + + _ejs_log (" size: %d pages: %d\n", 1<<(hp + 3), len); + }); + } +#if sanity + else { + for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { + EJS_LIST_FOREACH (&heap_pages[hp], PageInfo, page, { + for (int c = 0; c < CELLS_IN_PAGE (page); c ++) { + if (!cell_is_free(page->page_bitmap[c]) && !cell_is_white(page->page_bitmap[c])) + continue; + } + }) + } + } +#endif + SPEW(1, _ejs_log ("collection finished\n")); +} + +// heap footprint measured after the last collection's sweep. The +// collection trigger scales with this: a fixed allocation budget on a +// growing live set makes total GC work quadratic in heap size (shapes +// shapes moved per-object property storage into the GC heap, which pushed +// stage2's self-compile off that cliff — hours of back-to-back full +// marks of a ~900MB heap). Letting the heap grow ~gc_growth_pct% +// between full collections keeps total mark work linear (see +// full_gc_trigger; compaction shrinks this after a drop in live set, +// so the cadence adapts back down too). +size_t heap_size_at_last_gc = 0; + +void +_ejs_gc_collect(const char *reason) +{ + SPEW(1, _ejs_log ("_ejs_gc_collect(%s)\n", reason)); + prof_gc_reason = reason; +#if gc_timings > 0 + struct timeval tvbefore, tvafter; + + gettimeofday (&tvbefore, NULL); + + int heap_size = calc_heap_size(); +#endif + + _ejs_gc_collect_inner(EJS_FALSE); + + // post-sweep footprint drives the proportional collection trigger + // (see heap_size_at_last_gc) + heap_size_at_last_gc = calc_heap_size(); + +#if gc_timings > 0 + gettimeofday (&tvafter, NULL); + + uint64_t usec_before = tvbefore.tv_sec * 1000000 + tvbefore.tv_usec; + uint64_t usec_after = tvafter.tv_sec * 1000000 + tvafter.tv_usec; + + _ejs_log ("gc collect took %gms\n", (usec_after - usec_before) / 1000.0); + _ejs_log (" for a heap size of %zdMB\n", heap_size/(1024*1024)); +#if gc_timings > 1 + _ejs_gc_dump_heap_stats(); +#endif +#endif +} diff --git a/runtime/ejs-gc-mark.c b/runtime/ejs-gc-mark.c new file mode 100644 index 00000000..880ef1a9 --- /dev/null +++ b/runtime/ejs-gc-mark.c @@ -0,0 +1,622 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +// marking: the tri-color worklist, the precise slot scanners, the +// conservative stack/register/generator-stack scanners with the +// gc-frame skip machinery, and the full-GC mark phases. + +#include "ejs-gc-internal.h" + +#define MAX_WORKLIST_SEGMENT_SIZE 512 +typedef struct _WorkListSegmnt { + EJS_SLIST_HEADER(struct _WorkListSegmnt); + int size; + GCObjectPtr work_list[MAX_WORKLIST_SEGMENT_SIZE]; +} WorkListSegment; + +typedef struct { + WorkListSegment *list; + WorkListSegment *free_list; +} WorkList; + +static WorkList work_list; + +void +_ejs_gc_worklist_init() +{ + work_list.list = NULL; + work_list.free_list = NULL; +} + +static void +_ejs_gc_worklist_push(GCObjectPtr obj) +{ + if (obj == NULL) + return; + + WorkListSegment *segment; + + if (EJS_UNLIKELY(!work_list.list || work_list.list->size == MAX_WORKLIST_SEGMENT_SIZE)) { + // we need a new segment + if (work_list.free_list) { + // take one from the free list + segment = work_list.free_list; + EJS_SLIST_DETACH_HEAD(segment, work_list.free_list); + } + else { + segment = (WorkListSegment*)malloc (sizeof(WorkListSegment)); + segment->size = 0; + } + EJS_SLIST_ATTACH(segment, work_list.list); + } + else { + segment = work_list.list; + } + + segment->work_list[segment->size++] = obj; +} + +static GCObjectPtr +_ejs_gc_worklist_pop() +{ + if (work_list.list == NULL || work_list.list->size == 0/* shouldn't happen, since we push the page to the free list if we hit 0 */) + return NULL; + + WorkListSegment *segment = work_list.list; + + GCObjectPtr rv = segment->work_list[--segment->size]; + if (segment->size == 0) { + EJS_SLIST_DETACH_HEAD(segment, work_list.list); + EJS_SLIST_ATTACH(segment, work_list.free_list); + } + return rv; +} + +#define WORKLIST_PUSH_AND_GRAY(x) EJS_MACRO_START \ + if (is_white((GCObjectPtr)x)) { \ + _ejs_gc_worklist_push((GCObjectPtr)(x)); \ + set_gray ((GCObjectPtr)(x)); \ + } \ + EJS_MACRO_END + +#define WORKLIST_PUSH_AND_GRAY_CELL(x, cell) EJS_MACRO_START \ + if (cell_is_white(cell)) { \ + _ejs_gc_worklist_push((GCObjectPtr)(x)); \ + cell_set_gray(&cell); \ + } \ + EJS_MACRO_END + +static void +set_gray (GCObjectPtr ptr) +{ + uint32_t cell_idx; + PageInfo *page = find_page_and_cell(ptr, &cell_idx); + if (!page) + return; + + cell_set_gray(&page->page_bitmap[cell_idx]); +} + +static void +set_black (GCObjectPtr ptr) +{ + uint32_t cell_idx; + PageInfo *page = find_page_and_cell(ptr, &cell_idx); + if (!page) + return; + + cell_set_black(&page->page_bitmap[cell_idx]); +} + +static EJSBool +is_white (GCObjectPtr ptr) +{ + uint32_t cell_idx; + PageInfo *page = find_page_and_cell(ptr, &cell_idx); + if (!page) + return EJS_FALSE; + + return cell_is_white(page->page_bitmap[cell_idx]); +} + +// the mark-path scan callback. Slot-based per the new +// EJSValueFunc contract — this non-moving path only reads through the +// slot; the mover's evacuation callback is what rewrites it. +static void +_scan_ejsvalue (ejsval* slot) +{ + ejsval val = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(val)) return; + + GCObjectPtr gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(val); + + if (gcptr == NULL) return; + + WORKLIST_PUSH_AND_GRAY(gcptr); +} + +static void +_scan_from_ejsobject(EJSObject* obj) +{ + // freshly allocated objects are zeroed but not yet initialized (their + // constructor may trigger a collection before _ejs_init_object runs); + // there's nothing to scan in them yet. + if (obj->ops == NULL) + return; + OP(obj,Scan)(obj, _scan_ejsvalue); +} + +static void +_scan_from_ejsprimstr(EJSPrimString *primStr) +{ + EJSPrimStringType strtype = EJS_PRIMSTR_GET_TYPE(primStr); + + switch (strtype) { + case EJS_STRING_ROPE: + // inline _scan_ejsvalue's push logic here to save creating an ejsval from the primStr only to destruct + // it in _scan_ejsvalue + + WORKLIST_PUSH_AND_GRAY(primStr->data.rope.left); + WORKLIST_PUSH_AND_GRAY(primStr->data.rope.right); + break; + case EJS_STRING_DEPENDENT: + WORKLIST_PUSH_AND_GRAY(primStr->data.dependent.dep); + break; + case EJS_STRING_FLAT: + // nothing to do here + break; + } +} + +static void +_scan_from_ejsprimsym(EJSPrimSymbol *primSymbol) +{ + _scan_ejsvalue (&primSymbol->description); +} + +static void +_scan_from_ejsclosureenv(EJSClosureEnv *env) +{ + for (uint32_t i = 0; i < env->length; i ++) { + _scan_ejsvalue (&env->slots[i]); + } +} + +GCObjectPtr *stack_bottom; + +void +_ejs_gc_mark_thread_stack_bottom(GCObjectPtr* btm) +{ + stack_bottom = btm; + // the write barrier's transient-slot upper bound starts at + // the main stack's bottom (generator push/pop moves it) + _ejs_heap.current_stack_end = (void*)btm; +} + +static void +mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) +{ + GCObjectPtr* p; + for (p = low; p < high-1; p++) { + GCObjectPtr gcptr; + +#if OSX + // really a 64 bit check here, since for 64 bit systems, ejsvals can be stuck in registers, so we need to check if it's a valid + // ejsval gcthing as well. + ejsval ep = *(ejsval*)p; + if (EJSVAL_IS_GCTHING_IMPL(ep)) + gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(ep); + else +#endif + gcptr = *p; + + if (gcptr == NULL) continue; // skip nulls. + if ((char*)gcptr < conservative_lo || (char*)gcptr >= conservative_hi) + continue; // cheap prefilter: outside every arena/LOS block + + uint32_t cell_idx; + + PageInfo *page = find_page_and_cell(gcptr, &cell_idx); + if (!page) continue; // skip values outside our heap. + + // XXX more checks before we start treating the pointer like a GCObjectPtr? + BitmapCell cell = page->page_bitmap[cell_idx]; + if (!cell_is_allocated(page, cell_idx, cell)) continue; + + // during a minor collection conservative hits PIN young + // cells in place; nothing else is this collection's business + if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } + + // a conservative hit PINS: the compacting major must sweep this + // cell in place. Recorded even when the target is already + // marked (the white check below is a marking optimization, not + // a pin filter). profile_note_pin sets the same bit plus stats. + if (gc_profile) profile_note_pin(page, cell_idx, gcptr); + else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; + + if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells + + // canonicalize interior pointers to the start of their cell; the + // worklist processing reads the object header from the pointer. + gcptr = page->page_start + (cell_idx * page->cell_size); + + WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); + } +} + +// gc-frame slots are stack memory, so the conservative +// stack scan would see every precisely-rooted value a second time and +// pin it through its own slot — precision would never move anything. +// During a minor, the scan skips the frame records of the stack being +// scanned (their slots are walked precisely and rewritten). Full GC +// never skips: it relies on the conservative scan seeing the slots. +typedef struct { char* lo; char* hi; } FrameSkipRange; +#define MAX_FRAME_SKIP 1024 +static FrameSkipRange frame_skip[MAX_FRAME_SKIP]; +static int frame_skip_count; + +void +set_frame_skip_chain(void* chain_head) +{ + frame_skip_count = 0; + for (EJSGCFrame* f = (EJSGCFrame*)chain_head; f; f = f->prev) { + if (frame_skip_count == MAX_FRAME_SKIP) break; // partial skip = extra pins only + char* lo = (char*)f; + char* hi = lo + 16 + 8 * f->count; + // insertion sort by lo; chains are short and near-sorted + int i = frame_skip_count++; + while (i > 0 && frame_skip[i - 1].lo > lo) { + frame_skip[i] = frame_skip[i - 1]; + i--; + } + frame_skip[i].lo = lo; + frame_skip[i].hi = hi; + } +} + +void +clear_frame_skip(void) +{ + frame_skip_count = 0; +} + +static void +mark_ejsvals_in_range(void* low, void* high) +{ + // per-call skip cursor: ranges below `low` are behind us + int fr = 0; + while (fr < frame_skip_count && frame_skip[fr].hi <= (char*)low) fr++; + void* p = low; +#if IOS + while (((uintptr_t)p) & 0x7) { + p++; + } +#endif + for (; p < high - sizeof(ejsval); p += sizeof(ejsval)) { + // inside a gc-frame record? its slots are precise roots + while (fr < frame_skip_count && frame_skip[fr].hi <= (char*)p) fr++; + if (fr < frame_skip_count && (char*)p >= frame_skip[fr].lo) continue; + ejsval candidate_val = *((ejsval*)p); + GCObjectPtr gcptr; + if (EJSVAL_IS_GCTHING_IMPL(candidate_val)) { + gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(candidate_val); + } + else { + // also treat the slot as a raw, untagged pointer: optimized + // (opt -O2) code compiled by ejs unboxes closure envs and + // objects once and keeps/spills the raw pointer, with the + // tagged ejsval potentially dead. + gcptr = *(GCObjectPtr*)p; + } + + if (gcptr == NULL) continue; // skip nulls. + if ((char*)gcptr < conservative_lo || (char*)gcptr >= conservative_hi) + continue; // cheap prefilter: outside every arena/LOS block + + uint32_t cell_idx; + PageInfo *page = find_page_and_cell(gcptr, &cell_idx); + if (page) { + // XXX more checks before we start treating the pointer like a GCObjectPtr? + BitmapCell cell = page->page_bitmap[cell_idx]; + if (!cell_is_allocated(page, cell_idx, cell)) continue; + + // minor collections only pin young cells here + if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } + + // a conservative hit PINS: the compacting major must sweep + // this cell in place (recorded even when already marked) + if (gc_profile) profile_note_pin(page, cell_idx, gcptr); + else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; + + if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells + + // canonicalize interior pointers to the start of their cell; the + // worklist processing reads the object header from the pointer. + gcptr = page->page_start + (cell_idx * page->cell_size); + + WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); + } + } +} + +#define MAX_GENERATORS 256 +static int generator_count = 0; +static EJSGenerator* generators[MAX_GENERATORS]; + +// walk every gc-frame chain — the running stack's (the +// seam head) plus every suspended generator's saved chain and every +// ACTIVE generator's parked caller segment. Chains are per-stack and +// disjoint; records live in stack frames that stay mapped for exactly +// as long as they are linked (returns unlink, catches re-link their +// own frame past unwound callees, the generator hooks swap heads at +// every stack switch). +void +walk_gc_frames(void (*slot_fn)(ejsval*)) +{ + for (EJSGCFrame* f = (EJSGCFrame*)_ejs_heap.gc_frame_head; f; f = f->prev) + for (uintptr_t i = 0; i < f->count; i++) + slot_fn(&f->slots[i]); + for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) + for (EJSGCFrame* f = (EJSGCFrame*)g->gc_frame_head; f; f = f->prev) + for (uintptr_t i = 0; i < f->count; i++) + slot_fn(&f->slots[i]); + for (int gi = 0; gi < generator_count; gi++) + for (EJSGCFrame* f = (EJSGCFrame*)generators[gi]->caller_gc_frame_head; f; f = f->prev) + for (uintptr_t i = 0; i < f->count; i++) + slot_fn(&f->slots[i]); +} + +static void +mark_root_slot(ejsval* root) +{ + num_roots++; + ejsval rootval = *root; + if (!EJSVAL_IS_GCTHING_IMPL(rootval)) + return; + GCObjectPtr root_ptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(rootval); + if (root_ptr == NULL) + return; + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(root_ptr, &cell_idx); + if (!page) + return; + + BitmapCell cell = page->page_bitmap[cell_idx]; + if (cell_is_free(cell)) return; // skip free cells + if (!cell_is_white(cell)) return; // skip pointers to gray/black cells + WORKLIST_PUSH_AND_GRAY_CELL(root_ptr, page->page_bitmap[cell_idx]); +} + +void +mark_from_roots() +{ + SPEW (2, _ejs_log ("marking from roots")); + root_registry_foreach (mark_root_slot); + SPEW (2, _ejs_log ("done marking from roots")); +} + +void +mark_from_modules() +{ + SPEW(2, _ejs_log ("marking from module exotics")); + + for (int i = 0; i < _ejs_num_modules; i ++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + // modules are static globals whose object headers aren't set up + // until _ejs_require_init; if a collection happens before that + // (e.g. EJS_GC_EVERY_N_ALLOC during _ejs_init) there's nothing to + // scan yet. + if (mod->ops == NULL) + continue; + _scan_from_ejsobject(mod); + } +} + +#if TARGET_CPU_ARM +#define MARK_REGISTERS EJS_MACRO_START \ + GCObjectPtr __r0, __r1, __r2, __r3, __r4, __r5, __r6, __r7, __r8, __r9, __r10, __r11, __r12, __end; \ + __asm ("str r0, %0; str r1, %1; str r2, %2; str r3, %3; str r4, %4; str r5, %5; str r6, %6;" \ + "str r7, %7; str r8, %8; str r9, %9; str r10, %10; str r11, %11; str r12, %12;" \ + : "=m"(__r0), "=m"(__r1), "=m"(__r2), "=m"(__r3), "=m"(__r4), \ + "=m"(__r5), "=m"(__r6), "=m"(__r7), "=m"(__r8), "=m"(__r9), \ + "=m"(__r10), "=m"(__r11), "=m"(__r12)); \ + \ + mark_pointers_in_range(&__end, &__r0); \ + EJS_MACRO_END +#elif TARGET_CPU_ARM64 +// spill the callee-saved registers (x19-x28, plus fp) and treat them as +// roots. code compiled by ejs (opt -O2) keeps live ejsvals in callee-saved +// registers across calls, and the mostly -O0 runtime doesn't reliably save +// all of them anywhere the stack scan would see. (an empty MARK_REGISTERS +// here let live objects be collected and their cells reused -> heap +// corruption.) +#define MARK_REGISTERS EJS_MACRO_START \ + GCObjectPtr __regs[21]; \ + __asm volatile ("stp x19, x20, [%0, #0]\n\t" \ + "stp x21, x22, [%0, #16]\n\t" \ + "stp x23, x24, [%0, #32]\n\t" \ + "stp x25, x26, [%0, #48]\n\t" \ + "stp x27, x28, [%0, #64]\n\t" \ + "str x29, [%0, #80]\n\t" \ + /* llvm will spill gprs into the callee-saved simd \ + registers under pressure, so scan those too */ \ + "stp d8, d9, [%0, #88]\n\t" \ + "stp d10, d11, [%0, #104]\n\t" \ + "stp d12, d13, [%0, #120]\n\t" \ + "stp d14, d15, [%0, #136]" \ + : : "r"(__regs) : "memory"); \ + __regs[19] = __regs[20] = NULL; \ + /* mark_pointers_in_range scans [low, high-1) */ \ + mark_pointers_in_range(__regs, __regs + 21); \ + EJS_MACRO_END +#elif TARGET_CPU_AMD64 +#define MARK_REGISTERS EJS_MACRO_START \ + GCObjectPtr __rax, __rbx, __rcx, __rdx, __rsi, __rdi, __rbp, __rsp, __r8, __r9, __r10, __r11, __r12, __r13, __r14, __r15, __end; \ + __asm ("movq %%rax, %0; movq %%rbx, %1; movq %%rcx, %2; movq %%rdx, %3; movq %%rsi, %4;" \ + "movq %%rdi, %5; movq %%rbp, %6; movq %%rsp, %7; movq %%r8, %8; movq %%r9, %9;" \ + "movq %%r10, %10; movq %%r11, %11; movq %%r12, %12; movq %%r13, %13; movq %%r14, %14; movq %%r15, %15;" \ + : "=m"(__rax), "=m"(__rbx), "=m"(__rcx), "=m"(__rdx), "=m"(__rsi), \ + "=m"(__rdi), "=m"(__rbp), "=m"(__rsp), "=m"(__r8), "=m"(__r9), \ + "=m"(__r10), "=m"(__r11), "=m"(__r12), "=m"(__r13), "=m"(__r14), "=m"(__r15)); \ + \ + mark_pointers_in_range(&__end, &__rax); \ + EJS_MACRO_END +#elif TARGET_CPU_X86 +#define MARK_REGISTERS // just keep the build limping along +#else +#error "put code here to mark registers" +#endif + +// (MAX_GENERATORS / generators[] / generator_count moved above +// walk_gc_frames, which walks the active chain's parked caller +// segments) + +void +_ejs_gc_push_generator(EJSGenerator* gen) +{ + if (generator_count >= MAX_GENERATORS) { + _ejs_log ("too many nested generators (max %d)\n", MAX_GENERATORS); + abort(); + } + generators[generator_count++] = gen; + // keep the barrier's transient-slot bound on the CURRENT stack + _ejs_heap.current_stack_end = gen->stack + gen->stack_size; + // swap in this stack's gc-frame chain; the caller's segment + // parks on the generator until the matching pop + gen->caller_gc_frame_head = _ejs_heap.gc_frame_head; + _ejs_heap.gc_frame_head = gen->gc_frame_head; + gen->gc_frame_head = NULL; // the live chain is the seam head now +} + +void +_ejs_gc_pop_generator() +{ + generator_count--; + EJSGenerator* gen = generators[generator_count]; + _ejs_heap.current_stack_end = generator_count > 0 + ? generators[generator_count - 1]->stack + generators[generator_count - 1]->stack_size + : (void*)stack_bottom; + // park this stack's chain on the generator (walked while + // suspended), restore the caller's segment + gen->gc_frame_head = _ejs_heap.gc_frame_head; + _ejs_heap.gc_frame_head = gen->caller_gc_frame_head; + gen->caller_gc_frame_head = NULL; +} + +void +mark_thread_stack() +{ + prof_pin_source = PROF_SRC_REGS; + MARK_REGISTERS; + prof_pin_source = PROF_SRC_CSTACK; + + GCObjectPtr stack_top = NULL; + + // The CURRENT machine stack. When the mutator is running on a + // generator's malloc'd stack (collections happen inside + // _ejs_gc_alloc, which generator bodies call), [&stack_top, + // stack_bottom) is NOT a stack range — it spans from the malloc heap + // to the main stack across unmapped memory. Scan only up to the + // running generator's stack end; mark_generator_stacks covers the + // suspended caller segments. + void* high = (void*)stack_bottom; + if (generator_count > 0) { + EJSGenerator* running = generators[generator_count - 1]; + high = running->stack + running->stack_size; + } + + mark_ejsvals_in_range(((void*)&stack_top) + sizeof(GCObjectPtr), high); +} + +// mark a known heap object as a root (page cell or LOS both resolve +// through find_page_and_cell; the pointer must be an object base) +void +mark_object_root(GCObjectPtr ptr) +{ + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(ptr, &cell_idx); + if (!page) + return; + BitmapCell cell = page->page_bitmap[cell_idx]; + if (!cell_is_allocated(page, cell_idx, cell)) + return; + if (in_minor_gc) { + // minor collections: a young root pins; an old root's slots may hold + // young references, so queue it for the precise minor scan + // (duplicates are harmless — evacuation is idempotent) + if (page->young) minor_conservative_hit(page, cell_idx); + else minor_wl_push(ptr); + return; + } + if (!cell_is_white(cell)) + return; + WORKLIST_PUSH_AND_GRAY_CELL(ptr, page->page_bitmap[cell_idx]); +} + +// The chain of ACTIVE generators (generators whose bodies are on the +// current stack chain; push on start/resume, pop on yield/completion — +// generators[generator_count-1] owns the stack we are executing on). +// mark_thread_stack scans the running stack; this covers the rest: +// +// - each active generator OBJECT is a root for the cycle (its specop +// scan conservatively marks its own suspended frames and both saved +// ucontexts, i.e. the register files); +// - the SUSPENDED CALLER segment behind each swap-in: frames from the +// caller_stack_top recorded at the resume site up to that caller's +// stack end — the main stack (stack_bottom) for the outermost +// generator, the parent generator's stack end for nested ones. +// +// Suspended generators NOT in the chain need nothing here: if their +// object is reachable its scan covers their stack; if it is not, nothing +// on that stack is reachable either. +void +mark_generator_stacks() +{ + prof_pin_source = PROF_SRC_CSTACK; // the suspended segments ARE C stack + for (int i = 0; i < generator_count; i++) { + EJSGenerator* gen = generators[i]; + + mark_object_root((GCObjectPtr)gen); + + void* seg_high = (i == 0) ? (void*)stack_bottom + : generators[i - 1]->stack + generators[i - 1]->stack_size; + if (gen->caller_stack_top) { + // this caller segment's frames are the chain parked + // at push time (minor only; a full GC leaves skips empty) + if (in_minor_gc) set_frame_skip_chain(gen->caller_gc_frame_head); + mark_ejsvals_in_range(gen->caller_stack_top, seg_high); + if (in_minor_gc) clear_frame_skip(); + } + } +} + +void +process_worklist() +{ + GCObjectPtr p; + while ((p = _ejs_gc_worklist_pop())) { + set_black (p); + GCObjectHeader* headerp = (GCObjectHeader*)p; + if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) + _scan_from_ejsobject((EJSObject*)p); + else if ((*headerp & EJS_SCAN_TYPE_PRIMSTR) != 0) + _scan_from_ejsprimstr((EJSPrimString*)p); + else if ((*headerp & EJS_SCAN_TYPE_PRIMSYM) != 0) + _scan_from_ejsprimsym((EJSPrimSymbol*)p); + else if ((*headerp & EJS_SCAN_TYPE_CLOSUREENV) != 0) + _scan_from_ejsclosureenv((EJSClosureEnv*)p); + } + + EJS_ASSERT(work_list.list == NULL); +} + +void +_ejs_gc_mark_conservative_range(void* low, void* high) { + // only the generator scan uses this entry point (suspended stacks + + // saved ucontexts) — attribute its pins accordingly + int prev_src = prof_pin_source; + prof_pin_source = PROF_SRC_GENSTACK; + mark_ejsvals_in_range(low, high); + prof_pin_source = prev_src; +} diff --git a/runtime/ejs-gc-minor.c b/runtime/ejs-gc-minor.c new file mode 100644 index 00000000..0035ade8 --- /dev/null +++ b/runtime/ejs-gc-minor.c @@ -0,0 +1,695 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=cpp: + */ + +// the generational nursery: young pages over the seam cursors, the +// mostly-copying minor collection (pin, evacuate, forward, rewrite), +// and the remembered-set discipline. + +#include "ejs-gc-internal.h" + +EJSHeapContext _ejs_heap; // exported: the per-isolate context (the emitter seam) + +EJSBool nursery_enabled; // EJS_GC_NURSERY=off selects the old collector +EJSBool in_minor_gc; // the shared mark helpers dispatch on this + +EJSHeapPriv heap_priv; // the private half of the (single) isolate's context + +#define NURSERY_REMSET_CAPACITY (64 * 1024) + +// EJS_GC_MINOR_SPEW=1: per-event tracing for nursery debugging +static EJSBool minor_spew; +#define MINOR_SPEW(...) EJS_MACRO_START if (minor_spew) _ejs_log (__VA_ARGS__); EJS_MACRO_END + +// the seam cursors are authoritative while a page is being bumped; fold +// them back into the page before any collection looks at bump_ptr +static void +young_flush_bumps(void) +{ + for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) { + if (heap_priv.young_current[i]) + heap_priv.young_current[i]->bump_ptr = _ejs_heap.bump[i]; + } +} + +static void +young_page_retire_current(int idx) +{ + PageInfo* page = heap_priv.young_current[idx]; + if (!page) return; + page->bump_ptr = _ejs_heap.bump[idx]; + _ejs_list_append_node (&heap_priv.young_pages, (EJSListNode*)page); + heap_priv.young_current[idx] = NULL; + _ejs_heap.bump[idx] = _ejs_heap.limit[idx] = NULL; +} + +// grab a fresh page from the nursery arena for class idx, or NULL when +// the nursery is exhausted (the caller runs a minor collection) +static PageInfo* +young_page_install(int idx, size_t cell_size) +{ + Arena* arena = heap_priv.nursery_arena; + PageInfo* info = NULL; + if (in_minor_gc) { + _ejs_log ("GC BUG: young_page_install during a minor collection\n"); + abort(); + } + if (arena->free_pages) { + info = arena->free_pages; + EJS_LIST_DETACH(info, arena->free_pages); + info->cell_size = cell_size; + info->num_cells = CELLS_OF_SIZE(cell_size); + info->num_free_cells = info->num_cells; + } else { + info = alloc_page_from_arena(arena, cell_size); + if (!info) return NULL; + } + info->young = 1; + info->bump_ptr = info->page_start; + heap_priv.young_alloced += PAGE_SIZE; + // colors start at the CURRENT white (a young cell must never read + // as black mid-cycle); allocated-ness comes from the bump rule + memset (info->page_bitmap, cell_white_color(), info->num_cells * sizeof(BitmapCell)); + heap_priv.young_current[idx] = info; + _ejs_heap.bump[idx] = info->page_start; + _ejs_heap.limit[idx] = info->page_end; + return info; +} + +// an emptied young page leaves heap_priv.young_pages for the nursery +// arena's free list (called from _ejs_finalize_obj when a full sweep +// kills a survivor page's last cell) +void +young_page_freed(PageInfo* info, Arena* arena) +{ + EJS_ASSERT(arena && arena->is_nursery); + _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)info); + info->young = 0; + info->bump_ptr = info->page_start; + EJS_LIST_PREPEND (info, arena->free_pages); +} + +// set when a scan leaves a still-young (pinned) referent behind — the +// dirty owner carries to the next cycle +EJSBool minor_scan_saw_young; + +void +minor_wl_push(GCObjectPtr p) +{ + if (heap_priv.wl_count == heap_priv.wl_cap) { + heap_priv.wl_cap = heap_priv.wl_cap ? heap_priv.wl_cap * 2 : 4096; + heap_priv.wl = realloc (heap_priv.wl, heap_priv.wl_cap * sizeof(GCObjectPtr)); + } + heap_priv.wl[heap_priv.wl_count++] = p; +} + +// After memcpy'ing a cell, SELF-INTERIOR pointers still aim at the old +// cell (found the hard way: every inline-buffer flat string's data +// pointed at poison after promotion). The two classes in the runtime: +// flat strings without an out-of-line buffer (data.flat = self+hdr) and +// small EJSArguments (args = self+sizeof). Anything new that embeds a +// self-pointer must be added here — the planned trace-bitmap redesign +// subsumes this with offset-based addressing. +void +minor_fixup_evacuated(GCObjectPtr from, GCObjectPtr to, size_t cell_size) +{ + GCObjectHeader h = *(GCObjectHeader*)to; + if (h & EJS_SCAN_TYPE_PRIMSTR) { + EJSPrimString* s = (EJSPrimString*)to; + if (EJS_PRIMSTR_GET_TYPE(s) == EJS_STRING_FLAT) { + char* d = (char*)s->data.flat; + if (d >= (char*)from && d < (char*)from + cell_size) + s->data.flat = (jschar*)((char*)to + (d - (char*)from)); + } + } + else if (h & EJS_SCAN_TYPE_OBJECT) { + EJSObject* o = (EJSObject*)to; + if (o->ops == &_ejs_Arguments_specops) { + EJSArguments* a = (EJSArguments*)o; + char* d = (char*)a->args; + if (d >= (char*)from && d < (char*)from + cell_size) + a->args = (ejsval*)((char*)to + (d - (char*)from)); + } + // shaped ordinary objects with EMBEDDED slot storage (gc-P5 + // single-cell allocation): the slots ejsval points into the + // cell. Shape bits are only ever set on ordinary objects, so + // the header test suffices; dictionary mode (shape 0) keeps + // the map pointer in the union and must not be touched. + else if (((h >> EJS_GC_HEADER_SHAPE_SHIFT) & EJS_GC_HEADER_SHAPE_MASK) + != EJS_SHAPE_DICT + && !EJSVAL_IS_NULL(o->slots)) { + char* d = (char*)EJSVAL_TO_CLOSUREENV_IMPL(o->slots); + if (d >= (char*)from && d < (char*)from + cell_size) + rewrite_slot_payload(&o->slots, + (GCObjectPtr)((char*)to + (d - (char*)from))); + } + } +} + +// allocate an old-gen cell for a promotion. Never triggers collection +// (we are inside one); grows a new arena if need be, aborts loudly on +// genuine OOM. +static GCObjectPtr +old_alloc_cell_for_promotion(size_t cell_size) +{ + int bucket = ffs((int)cell_size) - OBJECT_SIZE_LOW_LIMIT_BITS; + PageInfo* info = (PageInfo*)heap_pages[bucket].head; + while (info && !info->num_free_cells) info = info->next; + if (!info) { + info = alloc_new_page(cell_size); + if (info == NULL) { + _ejs_log ("gc: promotion allocation failed (size %zd)\n", cell_size); + abort(); + } + _ejs_list_prepend_node (&heap_pages[bucket], (EJSListNode*)info); + } + GCObjectPtr rv = alloc_from_page(info); + return rv; +} + +// conservative hit during a minor collection: young targets pin in +// place (never move this cycle) and join the scan worklist once; old +// targets are not this collection's problem +void +minor_conservative_hit(PageInfo* page, uint32_t cell_idx) +{ + if (!page->young) return; + if (page->young == 1 && !young_cell_is_allocated(page, cell_idx)) return; + if (page->young == 2 && cell_is_free(page->page_bitmap[cell_idx])) return; + BitmapCell cell = page->page_bitmap[cell_idx]; + if (cell_is_black(cell)) return; // already pinned this minor + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + if (_ejs_gc_is_forwarded(base)) return; // pins precede evacuation; stale hit + cell_set_black(&page->page_bitmap[cell_idx]); + heap_priv.minor_pins++; + MINOR_SPEW("minor: pin %p\n", base); + gc_watch_hit ("pin", base); + minor_wl_push(base); +} + +// how many young referents the current minor's precise frame walk +// EVACUATED (as opposed to found pinned/forwarded/old) — the direct +// measure that precision is actually moving things (EJS_GC_PROFILE) +static uint64_t gc_frame_moves; + +// the minor collection's slot callback (the slot-protocol payoff: every precise +// scan — roots, modules, remset, transitive object scan — goes through +// here). Young referents evacuate (or stay pinned); the slot is +// rewritten to the object's final address. +static void +minor_process_slot(ejsval* slot) +{ + ejsval v = *slot; + if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; + GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); + if (p == NULL || !_ejs_gc_is_young(p)) return; + + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(p, &cell_idx); + EJS_ASSERT(page && page->young); + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + + if (_ejs_gc_is_forwarded(base)) { + rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(base)); + return; + } + if (cell_is_black(page->page_bitmap[cell_idx])) { + // pinned: stays put, already queued for scanning. The current + // owner must stay dirty so the edge is revisited next cycle. + minor_scan_saw_young = EJS_TRUE; + return; + } + + // evacuate: copy the whole cell, clear YOUNG on the copy (it is + // promoted), forward the old cell, rewrite this slot + GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); + memcpy (to, base, page->cell_size); + // promoted: not young; and not DIRTY — the memcpy'd bit would make + // the carry logic think the copy is already queued (it is not) + *(GCObjectHeader*)to &= ~(EJS_GC_HEADER_YOUNG | EJS_GC_HEADER_DIRTY); + minor_fixup_evacuated(base, to, page->cell_size); + _ejs_gc_forward(base, to); + rewrite_slot_payload(slot, to); + gc_watch_hit ("evacuate-from", base); + MINOR_SPEW("minor: evac %p -> %p (hdr %llx)\n", base, to, (unsigned long long)*(GCObjectHeader*)to); + heap_priv.promoted_objs++; + heap_priv.promoted_bytes += page->cell_size; + minor_wl_push(to); +} + +// evacuate/pin-resolve a RAW GC pointer field (rope/dependent string +// children — the only raw object->object pointers in the heap) +static void +minor_process_primstr_child(EJSPrimString** childp) +{ + GCObjectPtr p = (GCObjectPtr)*childp; + if (p == NULL || !_ejs_gc_is_young(p)) return; + uint32_t cell_idx; + PageInfo* page = find_page_and_cell(p, &cell_idx); + EJS_ASSERT(page && page->young); + GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); + if (_ejs_gc_is_forwarded(base)) { + *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(base); + return; + } + if (cell_is_black(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } + GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); + memcpy (to, base, page->cell_size); + // promoted: not young; and not DIRTY — the memcpy'd bit would make + // the carry logic think the copy is already queued (it is not) + *(GCObjectHeader*)to &= ~(EJS_GC_HEADER_YOUNG | EJS_GC_HEADER_DIRTY); + minor_fixup_evacuated(base, to, page->cell_size); + _ejs_gc_forward(base, to); + *childp = (EJSPrimString*)to; + MINOR_SPEW("minor: evac-child %p -> %p\n", base, to); + heap_priv.promoted_objs++; + heap_priv.promoted_bytes += page->cell_size; + minor_wl_push(to); +} + +// scan one object's outgoing edges with minor_process_slot — the exact +// shape of process_worklist's dispatch, on the slot-based protocol +static void +minor_scan_object(GCObjectPtr p) +{ + GCObjectHeader header = *(GCObjectHeader*)p; + if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { + EJSObject* obj = (EJSObject*)p; + if (obj->ops != NULL) + OP(obj,Scan)(obj, minor_process_slot); + } + else if ((header & EJS_SCAN_TYPE_PRIMSTR) != 0) { + EJSPrimString* primStr = (EJSPrimString*)p; + EJSBool child_still_young = EJS_FALSE; + switch (EJS_PRIMSTR_GET_TYPE(primStr)) { + case EJS_STRING_ROPE: + minor_process_primstr_child(&primStr->data.rope.left); + minor_process_primstr_child(&primStr->data.rope.right); + child_still_young = _ejs_gc_is_young(primStr->data.rope.left) + || _ejs_gc_is_young(primStr->data.rope.right); + break; + case EJS_STRING_DEPENDENT: + minor_process_primstr_child(&primStr->data.dependent.dep); + child_still_young = _ejs_gc_is_young(primStr->data.dependent.dep); + break; + case EJS_STRING_FLAT: + break; + } + if (child_still_young) + minor_scan_saw_young = EJS_TRUE; + } + else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) { + minor_process_slot(&((EJSPrimSymbol*)p)->description); + } + else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { + EJSClosureEnv* env = (EJSClosureEnv*)p; + for (uint32_t i = 0; i < env->length; i++) + minor_process_slot(&env->slots[i]); + } +} + +// the overflow fallback scans every live old object — it must maintain +// the same DIRTY-bit discipline as normal processing (clear, scan, +// re-dirty on remaining pinned-young refs), or bits desync from the +// swapped-away buffer and later stores skip re-queuing forever +static void +minor_scan_object_if_live(GCObjectPtr p) +{ + *(GCObjectHeader*)p &= ~EJS_GC_HEADER_DIRTY; + minor_scan_saw_young = EJS_FALSE; + minor_scan_object(p); + if (minor_scan_saw_young) + _ejs_gc_remember_slow(p); +} + +// A FULL collection frees dead old objects, so every remset/rescan +// entry — slots INTERIOR to old cells — may now dangle into poisoned +// memory (found as 0xfffc_afaf… "object-tagged poison" values read by +// the next minor). Rebuild the whole remembered state from a live +// old-gen walk instead: record every live old→young ejsval slot, re-add +// old strings with young raw children, and drop the LOS-pending list +// (the walk covers LOS objects). Full collections are rare; one extra +// old-gen walk apiece is cheap insurance. +void +remset_rebuild_after_full_gc(void) +{ + if (!nursery_enabled) return; + // entries are heap OBJECTS: drop the ones the sweep freed, keep the + // rest (their DIRTY bits are still set) + int kept = 0; + for (int i = 0; i < _ejs_heap.remset_count; i++) { + GCObjectPtr o = (GCObjectPtr)_ejs_heap.remset[i]; + uint32_t ci; + PageInfo* pg = find_page_and_cell(o, &ci); + if (!pg || !cell_is_allocated(pg, ci, pg->page_bitmap[ci])) + continue; + _ejs_heap.remset[kept++] = _ejs_heap.remset[i]; + } + _ejs_heap.remset_count = kept; +} + +void +_ejs_gc_minor_collect(const char* reason) +{ + struct timeval tv0, tv1; + gettimeofday (&tv0, NULL); + + if (in_minor_gc) { + _ejs_log ("GC BUG: reentrant minor collection (reason=%s)\n", reason); + abort(); + } + + // everything below this frame is collector machinery: the paranoid + // checker's raw-stack sweep must not read it (see ejs-gc-debug.c) + if (gc_paranoid) + paranoid_stack_floor = (void**)__builtin_frame_address(0); + + young_flush_bumps(); + + in_minor_gc = EJS_TRUE; + heap_priv.minors++; + MINOR_SPEW("minor: begin %llu\n", (unsigned long long)heap_priv.minors); + uint64_t promoted_objs_before = heap_priv.promoted_objs; + uint64_t promoted_bytes_before = heap_priv.promoted_bytes; + uint64_t pins_before = heap_priv.minor_pins; + int remset_used = _ejs_heap.remset_count; + EJSBool overflowed = _ejs_heap.remset_overflowed != 0; + if ((uint64_t)_ejs_heap.remset_count > heap_priv.remset_peak) + heap_priv.remset_peak = _ejs_heap.remset_count; + + // 0. swap the remset buffers up front: EVERY minor_process_slot call + // from here on (roots, modules, remset snapshot, transitive scan) + // may carry an old→pinned-young edge into the LIVE buffer for the + // next cycle — the snapshot is what this cycle processes + void** snapshot = _ejs_heap.remset; + int snapshot_count = _ejs_heap.remset_count; + EJSBool snapshot_overflowed = _ejs_heap.remset_overflowed != 0; + _ejs_heap.remset = heap_priv.remset_other; + heap_priv.remset_other = snapshot; + _ejs_heap.remset_count = 0; + _ejs_heap.remset_overflowed = 0; + + // 1. conservative pins FIRST: C stacks, registers, and EVERY live + // generator's suspended stack + saved contexts (the registry + // walk) — all ambiguous references must pin before any object + // moves; a generator discovered mid-trace would pin too late. + // The shared mark helpers dispatch to minor_conservative_hit + // while in_minor_gc is set. + struct timeval ph0, ph1, ph2, ph3, ph4, ph5; + int gen_count = 0; + gettimeofday (&ph0, NULL); + // each conservative range scan skips the gc-frame records of + // the stack it is scanning — those slots are precise roots, and + // seeing them conservatively would pin every frame-held value + // through its own slot (precision would never move anything) + set_frame_skip_chain(_ejs_heap.gc_frame_head); + mark_thread_stack(); + mark_generator_stacks(); + for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) { + set_frame_skip_chain(g->gc_frame_head); + _ejs_generator_scan_conservative(g); + gen_count++; + } + clear_frame_skip(); + gettimeofday (&ph1, NULL); + + // 1.5 the emitted gc-frame chains — precise, relocatable + // JS-frame roots. Runs AFTER the conservative pins on purpose: + // an object visible to both a gc-frame slot and a C frame (an + // ejsval argument into the very runtime call that triggered this + // minor, say) is pinned, and minor_process_slot leaves pinned + // targets in place — the pin must win or the C frame's copy + // dangles. Everything frame-held and NOT C-visible evacuates + // and gets its slot rewritten. + { + uint64_t promoted_before_frames = heap_priv.promoted_objs; + walk_gc_frames(minor_process_slot); + gc_frame_moves = heap_priv.promoted_objs - promoted_before_frames; + } + + // 2. precise roots: the root registry and module exports evacuate + root_registry_foreach (minor_process_slot); + for (int i = 0; i < _ejs_num_modules; i++) { + EJSObject* mod = (EJSObject*)_ejs_modules[i]; + if (mod->ops == NULL) continue; + OP(mod,Scan)(mod, minor_process_slot); + } + gettimeofday (&ph2, NULL); + + // 3. the remembered set snapshot (or, after overflow, every live + // old object) + if (snapshot_overflowed) { + heap_priv.overflow_minors++; + old_gen_walk (minor_scan_object_if_live); + } else { + for (int i = 0; i < snapshot_count; i++) { + GCObjectPtr owner = (GCObjectPtr)snapshot[i]; + // the object may have died and been swept by an interleaved + // FULL collection; its cell reads FREE then — skip. (A + // reused cell scans as whatever lives there now: merely + // conservative.) + uint32_t ci; + PageInfo* pg = find_page_and_cell(owner, &ci); + if (!pg || !cell_is_allocated(pg, ci, pg->page_bitmap[ci])) + continue; + *(GCObjectHeader*)owner &= ~EJS_GC_HEADER_DIRTY; + minor_scan_saw_young = EJS_FALSE; + minor_scan_object(owner); + // still holds pinned-young references: stay dirty + if (minor_scan_saw_young) + _ejs_gc_remember_slow(owner); + } + } + + // 4. transitive closure. Objects scanned here (promoted copies, + // pinned young, generator roots) that still reference pinned- + // young data must carry a dirty mark so the next cycle revisits + // them (young owners filter out inside remember). + gettimeofday (&ph3, NULL); + while (heap_priv.wl_count > 0) { + GCObjectPtr o = heap_priv.wl[--heap_priv.wl_count]; + minor_scan_saw_young = EJS_FALSE; + minor_scan_object (o); + if (minor_scan_saw_young && !_ejs_gc_is_young(o) + && !(*(GCObjectHeader*)o & EJS_GC_HEADER_DIRTY)) + _ejs_gc_remember_slow(o); + } + gettimeofday (&ph4, NULL); + + // 5. optional barrier-coverage verification + if (heap_priv.verify && !snapshot_overflowed) { + verify_bad_slot = NULL; + old_gen_walk (verify_check_object); + // generator specops re-run their conservative scans inside the + // verify walk (side effect: fresh pins pushed on the worklist); + // drain them before the sweep decides survivor pages + while (heap_priv.wl_count > 0) + minor_scan_object (heap_priv.wl[--heap_priv.wl_count]); + } + + // 6. sweep the young pages: dead cells finalize; forwarded cells are + // just space; pages with pins become survivor pages, the rest reset + for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) + young_page_retire_current(i); + + EJSList survivor_pages; + memset (&survivor_pages, 0, sizeof(survivor_pages)); + PageInfo* page; + while ((page = (PageInfo*)heap_priv.young_pages.head) != NULL) { + for (int sc = 0; sc < EJS_GC_NUM_SIZE_CLASSES; sc++) { + if (heap_priv.young_current[sc] == page + || ((char*)_ejs_heap.bump[sc] > (char*)page->page_start + && (char*)_ejs_heap.bump[sc] <= (char*)page->page_end)) { + _ejs_log ("GC BUG: sweeping page %p that is still active for class %d (bump=%p)\n", + page->page_start, sc, _ejs_heap.bump[sc]); + abort(); + } + } + int survivors = 0; + GCObjectPtr p = page->page_start; + for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { + EJSBool allocated = (page->young == 1) + ? young_cell_is_allocated(page, (uint32_t)c) + : !cell_is_free(page->page_bitmap[c]); + if (!allocated) { cell_set_free(&page->page_bitmap[c]); continue; } + if (_ejs_gc_is_forwarded(p)) { + // evacuated: the space is reusable; poison it now that + // every slot has been processed + gc_watch_hit ("sweep-poison-forwarded", p); + memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison + cell_set_free(&page->page_bitmap[c]); + continue; + } + if (cell_is_black(page->page_bitmap[c])) { + // pinned survivor: stays young, stays put; back to white + // so the next cycle (minor or full) sees it fresh + cell_set_white(&page->page_bitmap[c]); + cell_set_allocated(&page->page_bitmap[c]); + survivors++; + continue; + } + MINOR_SPEW("minor: free %p (hdr %llx)\n", p, (unsigned long long)*(GCObjectHeader*)p); + if (gc_paranoid) { + // who still references this about-to-die young object? + // (reverse lookup across every location the minor is + // supposed to have processed) + if (paranoid_report_referrers(p) > 0) + abort(); + } + gc_watch_hit ("sweep-poison-dead", p); + finalize_object(p); + memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison + cell_set_free(&page->page_bitmap[c]); + } + _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)page); + if (survivors == 0) { + page->young = 0; + page->bump_ptr = page->page_start; + page->num_free_cells = page->num_cells; + EJS_LIST_PREPEND(page, heap_priv.nursery_arena->free_pages); + } else { + page->young = 2; + page->num_free_cells = page->num_cells - survivors; + _ejs_list_append_node (&survivor_pages, (EJSListNode*)page); + } + } + heap_priv.young_pages = survivor_pages; + gettimeofday (&ph5, NULL); + + // 7. cycle accounting (the remset swapped/reset in step 0; carried + // edges are already in the live buffer); promoted bytes feed the + // FULL collection trigger (they are old-gen growth) + heap_priv.young_alloced = 0; + alloc_size += heap_priv.promoted_bytes - promoted_bytes_before; + + // seam/private-state consistency: every class was retired in step 6; + // nothing may have reinstalled a bump cursor mid-minor + for (int sc = 0; sc < EJS_GC_NUM_SIZE_CLASSES; sc++) { + if (_ejs_heap.bump[sc] != NULL || heap_priv.young_current[sc] != NULL) { + _ejs_log ("GC BUG: minor end: class %d seam desync (bump=%p current=%p)\n", + sc, _ejs_heap.bump[sc], (void*)heap_priv.young_current[sc]); + abort(); + } + } + + MINOR_SPEW("minor: end %llu\n", (unsigned long long)heap_priv.minors); + in_minor_gc = EJS_FALSE; + + gettimeofday (&tv1, NULL); + uint64_t usec = (tv1.tv_sec - tv0.tv_sec) * 1000000ULL + (tv1.tv_usec - tv0.tv_usec); + heap_priv.minor_usec_total += usec; + if (usec > heap_priv.minor_usec_max) heap_priv.minor_usec_max = usec; + if (gc_paranoid) + paranoid_sweep_check(); + if (gc_profile) { +#define PHUS(a,b) (((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec)) + _ejs_log ("EJS_GC_PROFILE: minor#%llu reason=%s pause=%.3fms promoted=%llu/%lluKB pins=%llu gcframe_moves=%llu remset=%d gens=%d phases[pins=%lld roots=%lld dirty=%lld wl=%lld sweep=%lld]us%s\n", + (unsigned long long)heap_priv.minors, reason, usec / 1000.0, + (unsigned long long)(heap_priv.promoted_objs - promoted_objs_before), + (unsigned long long)((heap_priv.promoted_bytes - promoted_bytes_before) / 1024), + (unsigned long long)(heap_priv.minor_pins - pins_before), + (unsigned long long)gc_frame_moves, + remset_used, gen_count, + (long long)PHUS(ph0,ph1), (long long)PHUS(ph1,ph2), (long long)PHUS(ph2,ph3), + (long long)PHUS(ph3,ph4), (long long)PHUS(ph4,ph5), + overflowed ? " OVERFLOW" : ""); +#undef PHUS + } + + // promotions grow the old gen; the policy may schedule a full + gc_policy (GC_POLICY_AFTER_MINOR, NULL); +} + +// the young allocation slow path: refill the class's bump page, running +// a minor collection when the nursery is exhausted +GCObjectPtr +young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type) +{ + young_page_retire_current(idx); + // the budget bounds the per-minor sweep (pause target <1ms) — the + // arena is the hard capacity, the budget the soft trigger + if (heap_priv.young_alloced >= heap_priv.young_budget) + _ejs_gc_minor_collect("nursery budget"); + if (!young_page_install(idx, cell_size)) { + _ejs_gc_minor_collect("nursery exhausted"); + if (!young_page_install(idx, cell_size)) { + // nursery still full (all survivor pages): give up on the + // nursery for this allocation and take the old path + return NULL; + } + } + void* p = _ejs_heap.bump[idx]; + _ejs_heap.bump[idx] = (char*)p + cell_size; + memset (p, 0, cell_size); + *(GCObjectHeader*)p = scan_type | EJS_GC_HEADER_YOUNG; + return p; +} + +// Full collections see young pages too. Active (bump-rule) pages have +// no valid FREE bits or num_free_cells, so normalize them to +// bitmap-authoritative survivor form first: cells below the bump are +// allocated, the rest free, and the page leaves bump service. After +// this the existing mark/sweep machinery handles them verbatim (their +// objects remain YOUNG by address range; the next minor collection +// evacuates or re-pins whatever survives the full GC). +void +young_normalize_for_full_gc(void) +{ + if (!nursery_enabled) return; + young_flush_bumps(); + for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) + young_page_retire_current(i); + for (PageInfo* page = (PageInfo*)heap_priv.young_pages.head; page; page = page->next) { + if (page->young != 1) continue; + int allocated = 0; + for (int c = 0; c < CELLS_IN_PAGE(page); c++) { + if (young_cell_is_allocated(page, (uint32_t)c)) { + cell_set_allocated(&page->page_bitmap[c]); + allocated++; + } else { + cell_set_free(&page->page_bitmap[c]); + } + } + page->num_free_cells = page->num_cells - allocated; + page->young = 2; + } + heap_priv.young_alloced = 0; +} + +void +nursery_init(void) +{ + // nursery ON by default (gate decision 2026-07-25); + // EJS_GC_NURSERY=off (or =0) selects the old collector for A/B. + { + char* e = getenv("EJS_GC_NURSERY"); + nursery_enabled = !(e && (strcmp(e, "off") == 0 || strcmp(e, "0") == 0)); + } + heap_priv.verify = getenv("EJS_GC_VERIFY") != NULL; + minor_spew = getenv("EJS_GC_MINOR_SPEW") != NULL; + gc_paranoid = getenv("EJS_GC_PARANOID") != NULL; + if (getenv("EJS_GC_WATCH")) + gc_watch_addr = (uintptr_t)strtoull(getenv("EJS_GC_WATCH"), NULL, 16); + // 1MB balances pause and throughput (measured 2026-07-25): minor p99 + // ~1.3ms on the bench corpus (512KB reaches 0.68ms at ~10% self- + // compile cost; 4MB buys self-compile ~3% at ~5ms p99) + heap_priv.young_budget = 1024 * 1024; + char* budget_env = getenv("EJS_GC_NURSERY_BUDGET"); + if (budget_env) heap_priv.young_budget = (size_t)atoll(budget_env); + if (!nursery_enabled) return; + + Arena* arena = arena_new(); + if (!arena) { + _ejs_log ("gc: could not allocate the nursery arena; nursery disabled\n"); + nursery_enabled = EJS_FALSE; + return; + } + arena->is_nursery = EJS_TRUE; + heap_priv.nursery_arena = arena; + _ejs_heap.nursery_base = (void*)arena; + _ejs_heap.nursery_end = arena->end; + _ejs_heap.remset = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); + _ejs_heap.remset_capacity = NURSERY_REMSET_CAPACITY; + heap_priv.remset_other = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); +} +// ===================== end nursery ========================================= diff --git a/runtime/ejs-gc.c b/runtime/ejs-gc.c index 5cb98494..8dfb82d8 100644 --- a/runtime/ejs-gc.c +++ b/runtime/ejs-gc.c @@ -2,199 +2,23 @@ * vim: set ts=4 sw=4 et tw=99 ft=cpp: */ -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "ejs-gc.h" -#include "ejs-function.h" -#include "ejs-generator.h" -#include "ejs-arguments.h" -#include "ejs-shapes.h" -#include "ejs-value.h" -#include "ejs-string.h" -#include "ejs-symbol.h" -#include "ejs-error.h" -#include "ejs-ops.h" -#include "ejsval.h" -#include "ejs-module.h" - -#define clear_on_finalize 0 - -#define spew 0 -#define sanity 0 -#define gc_timings 0 - -#if spew -static int _ejs_spew_level = (spew); -#define SPEW(level,x) do { if ((level) < _ejs_spew_level) { x; } } while (0) -#else -#define SPEW(level,x) -#endif -#if sanity -#define SANITY(x) x -#else -#define SANITY(x) -#endif +// the collector core: lifecycle API (init/alloc/shutdown), the cell +// free path, the root registry, the collection policy, the write- +// barrier entry points, and the GC JS object. The module map lives +// in ejs-gc-internal.h. + +#include "ejs-gc-internal.h" // exceptions to throw if we're out of memory static ejsval los_allocation_failed_exc EJSVAL_ALIGNMENT; static ejsval page_allocation_failed_exc EJSVAL_ALIGNMENT; -void _ejs_gc_dump_heap_stats(); - -#if EJS_BITS_PER_WORD == 64 -// 2GB -#define MAX_HEAP_SIZE (2LL * 1024LL * 1024LL * 1024LL) -#else -// 128MB -#define MAX_HEAP_SIZE (128LL * 1024LL * 1024LL) -#endif - -#ifndef PAGE_SIZE -#define PAGE_SIZE 4096 -#endif - -#define USABLE_PAGE_SIZE PAGE_SIZE - -#define CELLS_OF_SIZE(size) (USABLE_PAGE_SIZE / (size)) -#define CELLS_IN_PAGE(page) CELLS_OF_SIZE((page)->cell_size) - -// arenas are reserved in ARENA_PAGES * PAGE_SIZE chunks. ARENA_PAGES=4096 gives us an arena size of 32MB -#define ARENA_PAGES 8192 -#define ARENA_SIZE (PAGE_SIZE*ARENA_PAGES) - -#define PTR_TO_ARENA_MASK (uintptr_t)(~(ARENA_SIZE-1)) - -// turn a random pointer into an arena pointer -#define PTR_TO_ARENA(ptr) ((void*)((uintptr_t)(ptr) & PTR_TO_ARENA_MASK)) -#define PTR_TO_ARENA_PAGE_BASE(ptr) ((void*)EJS_ALIGN(PTR_TO_ARENA(ptr) + sizeof(Arena), PAGE_SIZE)) -#define PTR_TO_ARENA_PAGE_INDEX(ptr) ((((uintptr_t)(ptr) & ~PTR_TO_ARENA_MASK) - ((uintptr_t)PTR_TO_ARENA_PAGE_BASE(ptr) & ~PTR_TO_ARENA_MASK)) / PAGE_SIZE) - -#define PTR_TO_CELL(ptr,info) (((char*)(ptr) - (char*)(info)->page_start) / (info)->cell_size) - -#define OBJ_TO_PAGE(o) ((o) & ~PAGE_SIZE) - -#define IS_ALIGNED_TO(v,a) (((uintptr_t)(v) & ((a)-1)) == 0) -#define ALLOC_ALIGN 8 -#define EJS_ALIGN(v,a) (((uintptr_t)(v) + (a)-1) & ~((a)-1)) -#define IS_ALLOC_ALIGNED(v) IS_ALIGNED_TO(v, ALLOC_ALIGN) - -#if IOS || OSX -#include -#define MAP_FD VM_MAKE_TAG (VM_MEMORY_APPLICATION_SPECIFIC_16) -#else -#define MAP_FD -1 -#endif - EJSBool gc_disabled; int collect_every_alloc = 0; -// two header bits from the gc-reserved range (57-63; see ejs-types.h). -// YOUNG: set at allocation, cleared on first survival (profiling) or -// promotion (the nursery). PINNED: set on every conservative hit during -// a full collection — the compacting major must sweep that cell in -// place; cleared by compaction's fixup walk (or the profile census when -// compaction is off). -#define EJS_GC_HEADER_YOUNG (1ULL << 57) -#define EJS_GC_HEADER_PINNED (1ULL << 58) - -#if CONCURRENT -#error "not implemented" -#else -#define LOCK_PAGE(info) -#define UNLOCK_PAGE(info) -#define LOCK_GC() -#define UNLOCK_GC() -#define LOCK_ARENAS() -#define UNLOCK_ARENAS() -#endif - - -#define MAX_WORKLIST_SEGMENT_SIZE 512 -typedef struct _WorkListSegmnt { - EJS_SLIST_HEADER(struct _WorkListSegmnt); - int size; - GCObjectPtr work_list[MAX_WORKLIST_SEGMENT_SIZE]; -} WorkListSegment; - -typedef struct { - WorkListSegment *list; - WorkListSegment *free_list; -} WorkList; - -static WorkList work_list; - -static void -_ejs_gc_worklist_init() -{ - work_list.list = NULL; - work_list.free_list = NULL; -} - -static void -_ejs_gc_worklist_push(GCObjectPtr obj) -{ - if (obj == NULL) - return; - - WorkListSegment *segment; - - if (EJS_UNLIKELY(!work_list.list || work_list.list->size == MAX_WORKLIST_SEGMENT_SIZE)) { - // we need a new segment - if (work_list.free_list) { - // take one from the free list - segment = work_list.free_list; - EJS_SLIST_DETACH_HEAD(segment, work_list.free_list); - } - else { - segment = (WorkListSegment*)malloc (sizeof(WorkListSegment)); - segment->size = 0; - } - EJS_SLIST_ATTACH(segment, work_list.list); - } - else { - segment = work_list.list; - } - - segment->work_list[segment->size++] = obj; -} - -static GCObjectPtr -_ejs_gc_worklist_pop() -{ - if (work_list.list == NULL || work_list.list->size == 0/* shouldn't happen, since we push the page to the free list if we hit 0 */) - return NULL; - - WorkListSegment *segment = work_list.list; - - GCObjectPtr rv = segment->work_list[--segment->size]; - if (segment->size == 0) { - EJS_SLIST_DETACH_HEAD(segment, work_list.list); - EJS_SLIST_ATTACH(segment, work_list.free_list); - } - return rv; -} - -#define WORKLIST_PUSH_AND_GRAY(x) EJS_MACRO_START \ - if (is_white((GCObjectPtr)x)) { \ - _ejs_gc_worklist_push((GCObjectPtr)(x)); \ - set_gray ((GCObjectPtr)(x)); \ - } \ - EJS_MACRO_END - -#define WORKLIST_PUSH_AND_GRAY_CELL(x, cell) EJS_MACRO_START \ - if (cell_is_white(cell)) { \ - _ejs_gc_worklist_push((GCObjectPtr)(x)); \ - cell_set_gray(&cell); \ - } \ - EJS_MACRO_END +// the cell-lifecycle epoch (ejs-gc-internal.h owns the encoding); +// parity 1 at startup so black starts at color 1 +unsigned int mark_epoch = 1; // ---- the root registry ----------------------------------------- // @@ -209,362 +33,31 @@ static ejsval** root_registry; static int root_registry_count; static int root_registry_capacity; -static void +void root_registry_foreach(void (*fn)(ejsval*)) { for (int i = 0; i < root_registry_count; i++) fn(root_registry[i]); } -#ifndef MAP_NORESERVE -#define MAP_NORESERVE 0 -#endif - -// GC-heap pointers get NaN-boxed into a 47-bit ejsval payload, so every -// page must map below 2^47. macOS hands out low addresses naturally; -// linux (48-bit VA, top-down mmap) does not — ask for a hinted region -// and bump the hint as regions fill. -static void* -mmap_boxable(size_t size, int prot, int extra_flags) -{ -#ifdef TARGET_LINUX - static uintptr_t hint = 0x280000000000UL; // well below 2^47 - for (int tries = 0; tries < 64; tries++) { - void* res = mmap((void*)hint, size, prot, MAP_ANON | MAP_PRIVATE | extra_flags, MAP_FD, 0); - if (res == MAP_FAILED) return NULL; - if (((uintptr_t)res + size) < (1UL << 47)) { - hint = (uintptr_t)res + size; - return res; - } - // unboxable address: drop it and try a fresh hint - munmap(res, size); - hint += 0x100000000UL; // 4GB stride - } - return NULL; -#else - void* res = mmap(NULL, size, prot, MAP_ANON | MAP_PRIVATE | extra_flags, MAP_FD, 0); - return res == MAP_FAILED ? NULL : res; -#endif -} - -static void* -alloc_from_os(size_t size) -{ - size = MAX(size, PAGE_SIZE); - void* res = mmap_boxable(size, PROT_READ | PROT_WRITE, 0); - SPEW(2, _ejs_log ("mmap = %p\n", res)); - return res; -} - -static void -release_to_os(void* ptr, size_t size) -{ - munmap (ptr, size); -} - -typedef struct _LargeObjectInfo LargeObjectInfo; -static void release_to_los (LargeObjectInfo *lobj); - -typedef struct _PageInfo PageInfo; -typedef struct _Arena { - void* end; - void* pos; - PageInfo* free_pages; - void* pages[ARENA_PAGES]; - PageInfo* page_infos[ARENA_PAGES]; - int num_pages; - // the nursery is a dedicated arena so "is young" is a - // range check; old-gen page allocation skips nursery arenas - EJSBool is_nursery; -} Arena; - -#define MAX_ARENAS (MAX_HEAP_SIZE / ARENA_SIZE) -static Arena *heap_arenas[MAX_ARENAS]; -static int num_arenas; - -// ---- the arena address-space reservation (gc-P4) ---------------- -// -// All arenas are carved out of ONE contiguous reservation, mapped -// PROT_NONE at init and committed ARENA_SIZE at a time. Two payoffs, -// both for the conservative scanner: -// -// - the arena span is FIXED and disjoint from the C/LLVM heap for the -// life of the process. Before this, each arena was its own mmap: -// once a late arena landed beyond the C heap, the conservative -// prefilter span swallowed every malloc'd address, and during -// codegen MILLIONS of stack words pointing into LLVM's own -// allocations passed the prefilter into a per-word bsearch — the -// bistable 6s-vs-60s self-compile (mmap layout luck decided). -// - arena lookup is two compares + a shift into a direct map instead -// of a bsearch per candidate word. -// -// Reserved address space costs nothing until committed; nothing foreign -// can ever be mapped inside the reservation. -#define ARENA_SHIFT 25 -_Static_assert((1L << ARENA_SHIFT) == ARENA_SIZE, "ARENA_SHIFT matches ARENA_SIZE"); - -static char* arena_space; // base, ARENA_SIZE-aligned -static char* arena_space_pos; // next uncommitted chunk -static char* arena_space_end; // base + MAX_HEAP_SIZE -static Arena* arena_map[MAX_ARENAS]; // direct map: (ptr - base) >> ARENA_SHIFT - -static void -arena_space_reserve(void) -{ - size_t size = (size_t)MAX_HEAP_SIZE; - char* res = mmap_boxable(size + ARENA_SIZE, PROT_NONE, MAP_NORESERVE); - if (res == NULL) { - _ejs_log ("gc: unable to reserve the arena address space\n"); - abort(); - } - char* aligned = (char*)EJS_ALIGN(res, ARENA_SIZE); - // trim the alignment slop so the reservation is exactly the span - if (aligned > res) - munmap (res, aligned - res); - if (aligned + size < res + size + ARENA_SIZE) - munmap (aligned + size, (res + size + ARENA_SIZE) - (aligned + size)); - arena_space = aligned; - arena_space_pos = aligned; - arena_space_end = aligned + size; -} - -static inline Arena* -arena_lookup(GCObjectPtr ptr) -{ - uintptr_t off = (uintptr_t)((char*)ptr - arena_space); - if (off >= (uintptr_t)MAX_HEAP_SIZE) return NULL; - return arena_map[off >> ARENA_SHIFT]; -} - -// conservative-scan prefilter: [conservative_lo, conservative_hi) bounds -// every GC-managed address (the arena reservation + LOS blocks). The -// stack scanners reject candidate words with two compares before any -// lookup. Bounds only ever widen — stale coverage of freed LOS blocks -// is merely conservative, and a candidate inside the reservation that -// hits no committed arena rejects in the direct map. -static char *conservative_lo = (char*)UINTPTR_MAX; -static char *conservative_hi = NULL; -static inline void -conservative_bounds_add(void* start, size_t size) -{ - if ((char*)start < conservative_lo) conservative_lo = (char*)start; - if ((char*)start + size > conservative_hi) conservative_hi = (char*)start + size; -} - -// ---- LOS lookup: sorted range array ----------------------------- -// -// A conservative candidate that misses the arena reservation resolves -// against the LOS by binary search over a sorted array of payload -// ranges. This replaces a LOCKED LINEAR WALK of the whole LOS list — -// per stack word — which, with blocks scattered by mmap, could put -// hundreds of ms per pin scan on deep-recursion minors (found while -// gating sinking-P3; the [los_lo, los_hi) bounds prefilter landed then -// as a stopgap and remains as the quick reject). -static char *los_lo = (char*)UINTPTR_MAX; -static char *los_hi = NULL; - -// ---- the cell lifecycle ---------------------------------------- -// -// One bitmap byte per page cell. A cell is FREE or ALLOCATED, and an -// allocated cell carries a tri-color mark; every state predicate and -// transition lives in this block, and the encoding is private to it. -// -// White/black are EPOCH-RELATIVE: the color bits hold GRAY or the -// parity of the mark epoch the cell was last colored in. color == -// (mark_epoch & 1) is black (marked this epoch); the complement is -// white. mark_epoch_advance() — called at exactly one site, the end -// of a full collection — thus turns every surviving black cell white -// in O(1) without touching a bitmap. (The old collector expressed -// the same aging as a white_mask/black_mask swap mutated at the same -// site; the epoch is that flip made explicit and single-owner.) - -typedef char BitmapCell; - -#define CELL_COLOR_MASK 0x03 -#define CELL_GRAY 0x02 -#define CELL_FREE 0x04 // cell is in the free list for this page - -static unsigned int mark_epoch = 1; // parity 1: black starts at color 1 - -static inline BitmapCell cell_black_color(void) { return (BitmapCell)(mark_epoch & 1); } -static inline BitmapCell cell_white_color(void) { return (BitmapCell)((mark_epoch & 1) ^ 1); } - -// the ONLY place the white/black meaning ever changes -static inline void -mark_epoch_advance(void) -{ - mark_epoch++; -} - -static inline EJSBool cell_is_free (BitmapCell c) { return (c & CELL_FREE) == CELL_FREE; } -static inline EJSBool cell_is_gray (BitmapCell c) { return (c & CELL_COLOR_MASK) == CELL_GRAY; } -static inline EJSBool cell_is_white(BitmapCell c) { return (c & CELL_COLOR_MASK) == cell_white_color(); } -static inline EJSBool cell_is_black(BitmapCell c) { return (c & CELL_COLOR_MASK) == cell_black_color(); } - -static inline void cell_set_gray (BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | CELL_GRAY); } -static inline void cell_set_white(BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | cell_white_color()); } -static inline void cell_set_black(BitmapCell* c) { *c = (BitmapCell)((*c & ~CELL_COLOR_MASK) | cell_black_color()); } -static inline void cell_set_free (BitmapCell* c) { *c = CELL_FREE; } -static inline void cell_set_allocated(BitmapCell* c) { *c = (BitmapCell)(*c & ~CELL_FREE); } - -struct _PageInfo { - EJS_LIST_HEADER(struct _PageInfo); - void* bump_ptr; - void* page_start; - void* page_end; - BitmapCell* page_bitmap; - LargeObjectInfo *los_info; - int32_t cell_size; - int16_t num_cells; - int16_t num_free_cells; - // 0 = old gen; 1 = active young page (bump-allocated, - // allocated-ness = below bump); 2 = young survivor page (holds - // pinned young objects, bitmap-authoritative, no further bumping) - uint8_t young; -}; - -struct _LargeObjectInfo { - EJS_LIST_HEADER(struct _LargeObjectInfo); - size_t alloc_size; - PageInfo page_info; -}; - -#define OBJECT_SIZE_LOW_LIMIT_BITS 4 // smallest object we'll allocate (1<<4 = 16) -#define OBJECT_SIZE_HIGH_LIMIT_BITS 8 // max object size for the non-LOS allocator = 256 - -// heap_pages is indexed by ffs(cell_size) - OBJECT_SIZE_LOW_LIMIT_BITS, -// i.e. 16B -> 1 .. 256B -> 5 ([0] is unused); +2 covers the inclusive -// top class. Until gc-P5 the ffs comparisons below routed 256-byte -// cells to the LOS (ffs(256) = 9 > HIGH_LIMIT_BITS), so the top class -// existed only on paper — the pre-gc-P4 LOS had a linear lookup that -// made large cell populations quadratic to mark. With the LOS bsearch -// and the direct arena map in, the class is enabled: single-cell shaped -// objects up to the 14-field cap (32+16+112 = 160) and >14-slot envs -// now take pages, not the LOS. -#define HEAP_PAGELISTS_COUNT (OBJECT_SIZE_HIGH_LIMIT_BITS - OBJECT_SIZE_LOW_LIMIT_BITS) + 2 - -static EJSList heap_pages[HEAP_PAGELISTS_COUNT]; -static LargeObjectInfo *los_list; - -// ---- LOS lookup: sorted range array ----------------------------- -// -// A conservative candidate that misses the arena reservation resolves -// against the LOS by binary search over a sorted array of payload -// ranges. This replaces a LOCKED LINEAR WALK of the whole LOS list — -// per stack word — which, with blocks scattered by mmap, could put -// hundreds of ms per pin scan on deep-recursion minors (found while -// gating sinking-P3; the [los_lo, los_hi) bounds prefilter landed then -// as a stopgap and remains as the quick reject). -typedef struct { - char* start; // payload: page_info.page_start - char* end; // start + cell_size - LargeObjectInfo* lobj; -} LOSRange; -static LOSRange* los_ranges; -static int los_range_count; -static int los_range_capacity; - -// index of the first range with start > ptr, in [0, count] -static int -los_range_upper_bound(char* ptr) -{ - int lo = 0, hi = los_range_count; - while (lo < hi) { - int mid = (lo + hi) / 2; - if (los_ranges[mid].start <= ptr) lo = mid + 1; - else hi = mid; - } - return lo; -} - -static void -los_ranges_add(LargeObjectInfo* lobj) -{ - char* start = (char*)lobj->page_info.page_start; - if (start < los_lo) los_lo = start; - if (start + lobj->page_info.cell_size > los_hi) - los_hi = start + lobj->page_info.cell_size; - - if (los_range_count == los_range_capacity) { - los_range_capacity = los_range_capacity ? los_range_capacity * 2 : 256; - los_ranges = realloc (los_ranges, los_range_capacity * sizeof(LOSRange)); - } - int at = los_range_upper_bound(start); - memmove (&los_ranges[at + 1], &los_ranges[at], - (los_range_count - at) * sizeof(LOSRange)); - los_ranges[at].start = start; - los_ranges[at].end = start + lobj->page_info.cell_size; - los_ranges[at].lobj = lobj; - los_range_count++; -} - -static void -los_ranges_remove(LargeObjectInfo* lobj) -{ - char* start = (char*)lobj->page_info.page_start; - int at = los_range_upper_bound(start) - 1; - EJS_ASSERT(at >= 0 && los_ranges[at].lobj == lobj); - memmove (&los_ranges[at], &los_ranges[at + 1], - (los_range_count - at - 1) * sizeof(LOSRange)); - los_range_count--; -} - -// interior pointers match: a conservative reference may be a derived -// pointer whose base value the optimizer discarded — with an exact-base -// match a large object referenced ONLY through an interior pointer -// (e.g. a flat string's data) would be collected out from under it. -// Callers canonicalize through cell_idx 0, so an interior hit marks the -// base. -static PageInfo* -los_lookup(GCObjectPtr ptr, uint32_t *cell_idx) +// the shutdown collection NULLs every root before the final sweep +void +root_registry_shutdown(void) { - if ((char*)ptr < los_lo || (char*)ptr >= los_hi) - return NULL; - int at = los_range_upper_bound((char*)ptr) - 1; - if (at < 0 || (char*)ptr >= los_ranges[at].end) - return NULL; - if (cell_idx) - *cell_idx = 0; - return &los_ranges[at].lobj->page_info; + for (int i = 0; i < root_registry_count; i++) + *root_registry[i] = _ejs_null; + free (root_registry); + root_registry = NULL; + root_registry_count = root_registry_capacity = 0; } -// GC profiling instrumentation state (definitions live with the profile -// block further down, before the mark helpers use them) -static EJSBool gc_profile; -static struct timeval prof_start_tv; -static void profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw); -static void profile_report_shutdown(void); - -// nursery state + hooks (definitions in the nursery block -// below; declared here because the shared mark helpers dispatch on -// minor-collection mode) -static EJSBool nursery_enabled; -static EJSBool in_minor_gc; -static void minor_conservative_hit(PageInfo* page, uint32_t cell_idx); -static EJSBool young_cell_is_allocated(PageInfo* page, uint32_t cell_idx); -static void mark_thread_stack(void); -static void mark_generator_stacks(void); -static PageInfo* alloc_new_page(size_t cell_size); -static GCObjectPtr alloc_from_page(PageInfo* info); -static void finalize_object(GCObjectPtr p); -static void nursery_init(void); -static void young_normalize_for_full_gc(void); -static void young_page_freed(PageInfo* info, Arena* arena); -static void _ejs_gc_minor_collect(const char* reason); -static GCObjectPtr young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type); -// allocator accounting, defined with the allocator further down -extern size_t alloc_size; -extern size_t alloc_size_at_last_gc; -extern int num_allocs; -static size_t heap_size_at_last_gc; - // gc-P4: the compacting major (EJS_GC_COMPACT=off for A/B) and THE // full-collection growth knob — a full GC triggers when old-gen growth // since the last one exceeds gc_growth_pct percent of the post-sweep // footprint (floor: two arenas, so small programs keep a sane cadence). // The knob replaces the old fixed 60MB constant; with compaction // shrinking the heap, the trigger now adapts in BOTH directions. -static EJSBool compact_enabled; +EJSBool compact_enabled; static int gc_growth_pct = 50; static size_t @@ -587,14 +80,9 @@ full_gc_trigger(void) // AFTER_MINOR deliberately leaves num_allocs alone (the stress-minor // cadence owns it), and ALLOC_FAILED collects even under // EJS_GC_DISABLE — it is the allocator's last resort before throwing. -typedef enum { - GC_POLICY_YOUNG_ALLOC, // a nursery allocation is about to run - GC_POLICY_OLD_ALLOC, // an old-gen/LOS allocation is about to run - GC_POLICY_AFTER_MINOR, // a minor just retired; promotions grew the old gen - GC_POLICY_ALLOC_FAILED // allocator out of memory: forced full -} GCPolicyEvent; - -static void +// (GCPolicyEvent lives in ejs-gc-internal.h; the minor collection +// reports AFTER_MINOR from its retirement path.) +void gc_policy(GCPolicyEvent ev, const char* reason) { if (ev == GC_POLICY_ALLOC_FAILED) { @@ -639,212 +127,7 @@ gc_policy(GCPolicyEvent ev, const char* reason) } } -// allocated-ness of a cell: old pages answer from the bitmap; ACTIVE -// young pages (young==1) answer from the bump rule — everything below -// the bump cursor is an object, the bitmap holds only collection -// colors; SURVIVOR young pages (young==2) are bitmap-authoritative -// again (their pinned cells were re-marked at minor sweep) -static inline EJSBool -cell_is_allocated(PageInfo* page, uint32_t cell_idx, BitmapCell cell) -{ - if (page->young == 1) return young_cell_is_allocated(page, cell_idx); - return !cell_is_free(cell); -} - -void* ptr_to_arena(void* ptr) { return PTR_TO_ARENA(ptr); } -void* ptr_to_arena_page_base(void* ptr) { return PTR_TO_ARENA_PAGE_BASE(ptr); } -uintptr_t ptr_to_arena_page_index(void* ptr) { return PTR_TO_ARENA_PAGE_INDEX(ptr); } -uintptr_t ptr_to_cell(void* ptr, PageInfo* info ) { return PTR_TO_CELL(ptr, info); } - -#if sanity -static void -verify_arena(Arena *arena) -{ - for (int i = 0; i < arena->num_pages; i ++) { - EJS_ASSERT (arena->pages[i] == arena->page_infos[i]->page_start); - } -} -#endif - - -static Arena* -arena_new() -{ - if (arena_space_pos == arena_space_end) - return NULL; // the reservation IS the heap cap - - SPEW(1, _ejs_log ("num_arenas = %d, max = %d\n", num_arenas, MAX_ARENAS)); - - void* arena_start = arena_space_pos; - if (mprotect (arena_start, ARENA_SIZE, PROT_READ | PROT_WRITE) != 0) - return NULL; - - Arena* new_arena = arena_start; - - memset (new_arena, 0, sizeof(Arena)); - - new_arena->end = arena_start + ARENA_SIZE; - new_arena->pos = (void*)EJS_ALIGN(arena_start + sizeof(Arena), PAGE_SIZE); - - LOCK_ARENAS(); - arena_space_pos += ARENA_SIZE; - // sequential carving: heap_arenas stays address-sorted by construction - heap_arenas[num_arenas++] = new_arena; - arena_map[((char*)arena_start - arena_space) >> ARENA_SHIFT] = new_arena; - UNLOCK_ARENAS(); - - return new_arena; -} - -static PageInfo* -alloc_page_info_from_arena(Arena *arena, void *page_data, size_t cell_size) -{ - // FIXME allocate the PageInfo and bitmap from the arena as well - PageInfo* info = (PageInfo*)calloc(1, sizeof(PageInfo) + (sizeof(BitmapCell) * PAGE_SIZE / (1<cell_size = cell_size; - info->num_cells = CELLS_OF_SIZE(cell_size); - info->num_free_cells = info->num_cells; - EJS_ASSERT(info->num_cells > 0); - info->page_start = page_data; - info->page_end = info->page_start + PAGE_SIZE; - // allocate a bitmap large enough to store any sized object so we can reuse the bitmap - info->page_bitmap = (BitmapCell*)(((char*)info) + sizeof(PageInfo)); - info->bump_ptr = info->page_start; - memset (info->page_bitmap, CELL_FREE, info->num_cells * sizeof(BitmapCell)); - return info; -} - -static PageInfo* -alloc_page_from_arena(Arena *arena, size_t cell_size) -{ - void *page_data = (void*)EJS_ALIGN(arena->pos, PAGE_SIZE); - if (arena->free_pages) { - PageInfo* info = arena->free_pages; - EJS_LIST_DETACH(info, arena->free_pages); - info->cell_size = cell_size; - info->num_cells = CELLS_OF_SIZE(cell_size); - info->num_free_cells = info->num_cells; - info->bump_ptr = info->page_start; - memset (info->page_bitmap, CELL_FREE, info->num_cells * sizeof(BitmapCell)); - SPEW(3, _ejs_log ("alloc_page_from_arena from free pages for cell size %zd = %p\n", info->cell_size, info)); - return info; - } - else if (page_data < arena->end) { - PageInfo* info = alloc_page_info_from_arena (arena, page_data, cell_size); - int page_idx = arena->num_pages++; - arena->pos = page_data + PAGE_SIZE; - arena->pages[page_idx] = page_data; - arena->page_infos[page_idx] = info; - SPEW(3, _ejs_log ("alloc_page_from_arena from bump pointer for cell size %zd = %p\n", info->cell_size, info)); - return info; - } - else { - return NULL; - } -} - -static PageInfo* -find_page_and_cell(GCObjectPtr ptr, uint32_t *cell_idx) -{ - // bounds prefilter: static data (atoms, module structs) and foreign - // pointers reject in two compares - if ((char*)ptr < conservative_lo || (char*)ptr >= conservative_hi) - return NULL; - - Arena* arena = arena_lookup(ptr); - if (EJS_LIKELY (arena != NULL)) { - SANITY(verify_arena(arena)); - - int page_index = PTR_TO_ARENA_PAGE_INDEX(ptr); - - if (page_index < 0 || page_index >= arena->num_pages) { - return NULL; - } - - PageInfo *page = arena->page_infos[page_index]; - - // note: interior pointers are accepted (PTR_TO_CELL divides by the - // cell size, so any pointer into a cell resolves to that cell). - // optimized code compiled by ejs keeps addresses of closure env - // slots live across calls with the env base pointer dead, so the - // conservative scan must treat interior pointers as referencing - // the containing object. - - if (cell_idx) { - *cell_idx = PTR_TO_CELL(ptr, page); - EJS_ASSERT(*cell_idx >= 0 && *cell_idx < CELLS_IN_PAGE(page)); - } - - return page; - } - - return los_lookup(ptr, cell_idx); -} - -static void -set_gray (GCObjectPtr ptr) -{ - uint32_t cell_idx; - PageInfo *page = find_page_and_cell(ptr, &cell_idx); - if (!page) - return; - - cell_set_gray(&page->page_bitmap[cell_idx]); -} - -static void -set_black (GCObjectPtr ptr) -{ - uint32_t cell_idx; - PageInfo *page = find_page_and_cell(ptr, &cell_idx); - if (!page) - return; - - cell_set_black(&page->page_bitmap[cell_idx]); -} - -static EJSBool -is_white (GCObjectPtr ptr) -{ - uint32_t cell_idx; - PageInfo *page = find_page_and_cell(ptr, &cell_idx); - if (!page) - return EJS_FALSE; - - return cell_is_white(page->page_bitmap[cell_idx]); -} - -static PageInfo* -alloc_new_page(size_t cell_size) -{ - EJS_ASSERT(cell_size >= (1 << OBJECT_SIZE_LOW_LIMIT_BITS)); - SPEW(2, _ejs_log ("allocating new page for cell size %zd\n", cell_size)); - PageInfo *rv = NULL; - for (int i = 0; i < num_arenas; i ++) { - // nursery arenas serve young allocation only - if (heap_arenas[i]->is_nursery) - continue; - rv = alloc_page_from_arena(heap_arenas[i], cell_size); - if (rv) { - SPEW(2, _ejs_log (" => %p", rv)); - return rv; - } - } - - // need a new arena - SPEW(2, _ejs_log ("unable to find page in current arenas, allocating a new one")); - LOCK_ARENAS(); - Arena* arena = arena_new(); - UNLOCK_ARENAS(); - if (arena == NULL) - return NULL; - rv = alloc_page_from_arena(arena, cell_size); - SPEW(2, _ejs_log (" => %p", rv)); - return rv; -} - -static void +void finalize_object(GCObjectPtr p) { GCObjectHeader* headerp = (GCObjectHeader*)p; @@ -875,7 +158,7 @@ finalize_object(GCObjectPtr p) } } -static void +void _ejs_finalize_obj(GCObjectPtr ptr, Arena* arena, PageInfo* info, uint32_t cell_idx) { EJS_ASSERT(info); @@ -975,15 +258,8 @@ _ejs_gc_init() _ejs_log ("EJS_GC_SELFTEST: forwarding helpers ok\n"); } - // one reservation holds every arena the process will ever commit; - // the conservative prefilter covers it from day one (candidates in - // uncommitted space reject via the direct map) - arena_space_reserve(); - conservative_bounds_add (arena_space, (size_t)MAX_HEAP_SIZE); - - // allocate an initial arenas - for (int i = 0; i < 10; i ++) - arena_new(); + // the arena reservation + initial arenas (ejs-gc-heap.c) + heap_space_init(); _ejs_gc_worklist_init(); @@ -1002,2398 +278,73 @@ _ejs_gc_allocate_oom_exceptions() page_allocation_failed_exc = _ejs_nativeerror_new_utf8 (EJS_ERROR, "page allocation failed"); } -// the mark-path scan callback. Slot-based per the new -// EJSValueFunc contract — this non-moving path only reads through the -// slot; the mover's evacuation callback is what rewrites it. -static void -_scan_ejsvalue (ejsval* slot) -{ - ejsval val = *slot; - if (!EJSVAL_IS_TRACEABLE_IMPL(val)) return; - - GCObjectPtr gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(val); - - if (gcptr == NULL) return; - - WORKLIST_PUSH_AND_GRAY(gcptr); -} +static int num_object_allocs = 0; +static int num_closureenv_allocs = 0; +static int num_primstr_allocs = 0; +static int num_primsym_allocs = 0; -static void -_scan_from_ejsobject(EJSObject* obj) -{ - // freshly allocated objects are zeroed but not yet initialized (their - // constructor may trigger a collection before _ejs_init_object runs); - // there's nothing to scan in them yet. - if (obj->ops == NULL) - return; - OP(obj,Scan)(obj, _scan_ejsvalue); -} +int total_allocs = 0; -static void -_scan_from_ejsprimstr(EJSPrimString *primStr) +void +_ejs_gc_shutdown() { - EJSPrimStringType strtype = EJS_PRIMSTR_GET_TYPE(primStr); + _ejs_gc_collect_inner(EJS_TRUE); + SPEW(1, _ejs_log ("total allocs = %d\n", total_allocs)); - switch (strtype) { - case EJS_STRING_ROPE: - // inline _scan_ejsvalue's push logic here to save creating an ejsval from the primStr only to destruct - // it in _scan_ejsvalue + if (gc_profile) + profile_report_shutdown(); - WORKLIST_PUSH_AND_GRAY(primStr->data.rope.left); - WORKLIST_PUSH_AND_GRAY(primStr->data.rope.right); - break; - case EJS_STRING_DEPENDENT: - WORKLIST_PUSH_AND_GRAY(primStr->data.dependent.dep); - break; - case EJS_STRING_FLAT: - // nothing to do here - break; - } + _ejs_log ("gc allocation stats (_ejs_gc_shutdown):\n"); + _ejs_log (" objects: %d\n", num_object_allocs); + _ejs_log (" closureenv: %d\n", num_closureenv_allocs); + _ejs_log (" primstr: %d\n", num_primstr_allocs); + _ejs_log (" primsym: %d\n", num_primsym_allocs); } -static void -_scan_from_ejsprimsym(EJSPrimSymbol *primSymbol) +/* Compute the smallest power of 2 that is >= x. */ +static inline size_t +pow2_ceil(size_t x) { - _scan_ejsvalue (&primSymbol->description); -} -static void -_scan_from_ejsclosureenv(EJSClosureEnv *env) -{ - for (uint32_t i = 0; i < env->length; i ++) { - _scan_ejsvalue (&env->slots[i]); - } + x--; + x |= x >> 1; + x |= x >> 2; + x |= x >> 4; + x |= x >> 8; + x |= x >> 16; +#if (SIZEOF_PTR == 8) + x |= x >> 32; +#endif + x++; + return (x); } -static GCObjectPtr *stack_bottom; - -void -_ejs_gc_mark_thread_stack_bottom(GCObjectPtr* btm) -{ - stack_bottom = btm; - // the write barrier's transient-slot upper bound starts at - // the main stack's bottom (generator push/pop moves it) - _ejs_heap.current_stack_end = (void*)btm; -} +size_t alloc_size = 0; +int num_allocs = 0; +size_t alloc_size_at_last_gc = 0; -static void -mark_pointers_in_range(GCObjectPtr* low, GCObjectPtr* high) +GCObjectPtr +_ejs_gc_alloc(size_t size, EJSScanType scan_type) { - GCObjectPtr* p; - for (p = low; p < high-1; p++) { - GCObjectPtr gcptr; - -#if OSX - // really a 64 bit check here, since for 64 bit systems, ejsvals can be stuck in registers, so we need to check if it's a valid - // ejsval gcthing as well. - ejsval ep = *(ejsval*)p; - if (EJSVAL_IS_GCTHING_IMPL(ep)) - gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(ep); - else -#endif - gcptr = *p; - - if (gcptr == NULL) continue; // skip nulls. - if ((char*)gcptr < conservative_lo || (char*)gcptr >= conservative_hi) - continue; // cheap prefilter: outside every arena/LOS block - - uint32_t cell_idx; - - PageInfo *page = find_page_and_cell(gcptr, &cell_idx); - if (!page) continue; // skip values outside our heap. - - // XXX more checks before we start treating the pointer like a GCObjectPtr? - BitmapCell cell = page->page_bitmap[cell_idx]; - if (!cell_is_allocated(page, cell_idx, cell)) continue; + GCObjectPtr rv = NULL; - // during a minor collection conservative hits PIN young - // cells in place; nothing else is this collection's business - if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } + num_allocs ++; + total_allocs ++; - // a conservative hit PINS: the compacting major must sweep this - // cell in place. Recorded even when the target is already - // marked (the white check below is a marking optimization, not - // a pin filter). profile_note_pin sets the same bit plus stats. - if (gc_profile) profile_note_pin(page, cell_idx, gcptr); - else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; + switch (scan_type) { + case EJS_SCAN_TYPE_PRIMSTR: num_primstr_allocs ++; break; + case EJS_SCAN_TYPE_PRIMSYM: num_primsym_allocs ++; break; + case EJS_SCAN_TYPE_OBJECT: num_object_allocs ++; break; + case EJS_SCAN_TYPE_CLOSUREENV: num_closureenv_allocs ++; break; + } - if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells + int bucket; + int bucket_size = MAX(pow2_ceil(size), 1<page_start + (cell_idx * page->cell_size); + bucket = ffs(bucket_size); - WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); - } -} - -// gc-frame slots are stack memory, so the conservative -// stack scan would see every precisely-rooted value a second time and -// pin it through its own slot — precision would never move anything. -// During a minor, the scan skips the frame records of the stack being -// scanned (their slots are walked precisely and rewritten). Full GC -// never skips: it relies on the conservative scan seeing the slots. -typedef struct { char* lo; char* hi; } FrameSkipRange; -#define MAX_FRAME_SKIP 1024 -static FrameSkipRange frame_skip[MAX_FRAME_SKIP]; -static int frame_skip_count; - -static void -set_frame_skip_chain(void* chain_head) -{ - frame_skip_count = 0; - for (EJSGCFrame* f = (EJSGCFrame*)chain_head; f; f = f->prev) { - if (frame_skip_count == MAX_FRAME_SKIP) break; // partial skip = extra pins only - char* lo = (char*)f; - char* hi = lo + 16 + 8 * f->count; - // insertion sort by lo; chains are short and near-sorted - int i = frame_skip_count++; - while (i > 0 && frame_skip[i - 1].lo > lo) { - frame_skip[i] = frame_skip[i - 1]; - i--; - } - frame_skip[i].lo = lo; - frame_skip[i].hi = hi; - } -} - -static void -clear_frame_skip(void) -{ - frame_skip_count = 0; -} - -static void -mark_ejsvals_in_range(void* low, void* high) -{ - // per-call skip cursor: ranges below `low` are behind us - int fr = 0; - while (fr < frame_skip_count && frame_skip[fr].hi <= (char*)low) fr++; - void* p = low; -#if IOS - while (((uintptr_t)p) & 0x7) { - p++; - } -#endif - for (; p < high - sizeof(ejsval); p += sizeof(ejsval)) { - // inside a gc-frame record? its slots are precise roots - while (fr < frame_skip_count && frame_skip[fr].hi <= (char*)p) fr++; - if (fr < frame_skip_count && (char*)p >= frame_skip[fr].lo) continue; - ejsval candidate_val = *((ejsval*)p); - GCObjectPtr gcptr; - if (EJSVAL_IS_GCTHING_IMPL(candidate_val)) { - gcptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(candidate_val); - } - else { - // also treat the slot as a raw, untagged pointer: optimized - // (opt -O2) code compiled by ejs unboxes closure envs and - // objects once and keeps/spills the raw pointer, with the - // tagged ejsval potentially dead. - gcptr = *(GCObjectPtr*)p; - } - - if (gcptr == NULL) continue; // skip nulls. - if ((char*)gcptr < conservative_lo || (char*)gcptr >= conservative_hi) - continue; // cheap prefilter: outside every arena/LOS block - - uint32_t cell_idx; - PageInfo *page = find_page_and_cell(gcptr, &cell_idx); - if (page) { - // XXX more checks before we start treating the pointer like a GCObjectPtr? - BitmapCell cell = page->page_bitmap[cell_idx]; - if (!cell_is_allocated(page, cell_idx, cell)) continue; - - // minor collections only pin young cells here - if (in_minor_gc) { minor_conservative_hit(page, cell_idx); continue; } - - // a conservative hit PINS: the compacting major must sweep - // this cell in place (recorded even when already marked) - if (gc_profile) profile_note_pin(page, cell_idx, gcptr); - else *(GCObjectHeader*)(page->page_start + ((size_t)cell_idx * page->cell_size)) |= EJS_GC_HEADER_PINNED; - - if (!cell_is_white(cell)) continue; // skip pointers to gray/black cells - - // canonicalize interior pointers to the start of their cell; the - // worklist processing reads the object header from the pointer. - gcptr = page->page_start + (cell_idx * page->cell_size); - - WORKLIST_PUSH_AND_GRAY_CELL(gcptr, page->page_bitmap[cell_idx]); - } - } -} - -static int num_roots = 0; -static int white_objs = 0; -static int large_objs = 0; -static int total_objs = 0; - -static int num_object_allocs = 0; -static int num_closureenv_allocs = 0; -static int num_primstr_allocs = 0; -static int num_primsym_allocs = 0; - -// ---- measurement instrumentation (EJS_GC_PROFILE=1) ----------- -// -// Two header bits from the gc-reserved range (57-63; see ejs-types.h — the -// shapes machinery masks its 24-bit index, so these are invisible to it): -// -// YOUNG: set at allocation, cleared on the first collection the object -// survives. "young" therefore means "allocated since the last -// collection" — exactly the population a generational nursery -// would manage, so per-cycle young-survival is THE -// number that sizes the nursery payoff. -// PINNED: set (once per cycle) when a CONSERVATIVE reference — C stack, -// spilled registers, generator stacks/contexts — hits the -// object. Under the mover these are the objects that cannot -// be evacuated this cycle; their count/bytes/sources size the -// payoff of precise JS frames and decide its ordering. -// -// The YOUNG bit is set unconditionally (an OR folded into the header -// store the allocator already does); everything else is gated on -// gc_profile so the measured path stays clean when profiling is off. -// (The YOUNG/PINNED #defines live near the top of the file — the mark -// helpers set PINNED for the compacting major.) - -enum { - PROF_SRC_CSTACK = 0, // conservative C-stack ranges (incl. suspended segments) - PROF_SRC_REGS = 1, // spilled register file - PROF_SRC_GENSTACK = 2, // suspended generator stacks + saved ucontexts - PROF_SRC_COUNT -}; -static const char* prof_src_names[PROF_SRC_COUNT] = { "cstack", "regs", "genstack" }; -static int prof_pin_source = PROF_SRC_CSTACK; - -#define PROF_NBUCKETS 12 // ffs buckets 16B.. + [0] = LOS -static uint64_t prof_alloc_count[PROF_NBUCKETS]; -static uint64_t prof_alloc_bytes[PROF_NBUCKETS]; -static uint64_t prof_kind_count[4]; // primstr, primsym, object, closureenv -static uint64_t prof_alloc_total_count = 0; -static uint64_t prof_alloc_total_bytes = 0; -// the young population: allocations since the last collection -static uint64_t prof_young_count = 0; -static uint64_t prof_young_bytes = 0; -// per-cycle pin accounting (reset after each report) -static uint64_t prof_pin_count[PROF_SRC_COUNT]; -static uint64_t prof_pin_bytes[PROF_SRC_COUNT]; -static uint64_t prof_pin_young = 0, prof_pin_old = 0; -static uint64_t prof_pin_env_interior = 0, prof_pin_los = 0; -static uint64_t prof_collections = 0; -static uint64_t prof_total_pause_usec = 0; -static const char* prof_gc_reason = "?"; - -static void -profile_note_alloc(size_t size, int ffs_bucket, EJSScanType scan_type) -{ - int idx; - if (ffs_bucket > OBJECT_SIZE_HIGH_LIMIT_BITS + 1) - idx = 0; // LOS - else { - idx = ffs_bucket - OBJECT_SIZE_LOW_LIMIT_BITS; - if (idx < 1) idx = 1; - if (idx >= PROF_NBUCKETS) idx = PROF_NBUCKETS - 1; - } - prof_alloc_count[idx]++; - prof_alloc_bytes[idx] += size; - prof_alloc_total_count++; - prof_alloc_total_bytes += size; - switch (scan_type) { - case EJS_SCAN_TYPE_PRIMSTR: prof_kind_count[0]++; break; - case EJS_SCAN_TYPE_PRIMSYM: prof_kind_count[1]++; break; - case EJS_SCAN_TYPE_OBJECT: prof_kind_count[2]++; break; - case EJS_SCAN_TYPE_CLOSUREENV: prof_kind_count[3]++; break; - } - prof_young_count++; - prof_young_bytes += size; -} - -// a conservative reference hit an allocated cell: under the mover this -// object is pinned for the cycle. counted once per cycle per object -// (dedupe via the PINNED header bit), attributed to the scan source that -// found it first, split young/old, with env-interior-pointer and LOS -// sub-counts. runs BEFORE the white-check filter: a hit on an -// already-marked object still pins it. -static void -profile_note_pin(PageInfo* page, uint32_t cell_idx, GCObjectPtr raw) -{ - GCObjectPtr base = page->page_start + (cell_idx * page->cell_size); - GCObjectHeader* h = (GCObjectHeader*)base; - if (*h & EJS_GC_HEADER_PINNED) - return; - *h |= EJS_GC_HEADER_PINNED; - prof_pin_count[prof_pin_source]++; - prof_pin_bytes[prof_pin_source] += page->cell_size; - if (*h & EJS_GC_HEADER_YOUNG) prof_pin_young++; else prof_pin_old++; - if (raw != base && (*h & EJS_SCAN_TYPE_CLOSUREENV)) prof_pin_env_interior++; - if (page->los_info) prof_pin_los++; -} - -// per-cycle results filled by profile_pre_sweep (which must run after -// marking and BEFORE the sweep frees the dead cells), printed with the -// pause by profile_report_cycle_end -static uint64_t prof_cycle_live_count, prof_cycle_live_bytes; -static uint64_t prof_cycle_ysurv_count, prof_cycle_ysurv_bytes; - -static void -profile_visit_live_cell(GCObjectHeader* h, size_t bytes) -{ - prof_cycle_live_count++; - prof_cycle_live_bytes += bytes; - if (*h & EJS_GC_HEADER_YOUNG) { - prof_cycle_ysurv_count++; - prof_cycle_ysurv_bytes += bytes; - *h &= ~EJS_GC_HEADER_YOUNG; // survived one collection: no longer young - } - // reset pins for the next cycle — but the census runs PRE-sweep and - // the compacting major reads pins POST-sweep (and clears them in its - // fixup walk); clearing here would un-pin every C-visible object - // right before evacuation decides what may move - if (!compact_enabled) - *h &= ~EJS_GC_HEADER_PINNED; -} - -static void -profile_pre_sweep(void) -{ - prof_cycle_live_count = prof_cycle_live_bytes = 0; - prof_cycle_ysurv_count = prof_cycle_ysurv_bytes = 0; - for (int i = 0; i < HEAP_PAGELISTS_COUNT; i++) { - EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { - GCObjectPtr p = page->page_start; - for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { - BitmapCell cell = page->page_bitmap[c]; - if (cell_is_free(cell) || cell_is_white(cell)) continue; - profile_visit_live_cell((GCObjectHeader*)p, page->cell_size); - } - }); - } - for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { - BitmapCell cell = lobj->page_info.page_bitmap[0]; - if (cell_is_free(cell) || cell_is_white(cell)) continue; - profile_visit_live_cell((GCObjectHeader*)lobj->page_info.page_start, - lobj->page_info.cell_size); - } -} - -static void -profile_report_cycle_end(uint64_t pause_usec) -{ - prof_collections++; - prof_total_pause_usec += pause_usec; - double surv_pct = prof_young_bytes - ? 100.0 * (double)prof_cycle_ysurv_bytes / (double)prof_young_bytes : 0.0; - _ejs_log ("EJS_GC_PROFILE: gc#%llu reason=%s pause=%.2fms " - "live=%llu objs/%.2fMB | young allocd=%llu/%.2fMB " - "survived=%llu/%.2fMB (%.1f%% of bytes) | pins: " - "cstack=%llu/%lluKB regs=%llu/%lluKB genstack=%llu/%lluKB " - "envint=%llu los=%llu young=%llu old=%llu\n", - (unsigned long long)prof_collections, prof_gc_reason, - pause_usec / 1000.0, - (unsigned long long)prof_cycle_live_count, - prof_cycle_live_bytes / (1024.0 * 1024.0), - (unsigned long long)prof_young_count, - prof_young_bytes / (1024.0 * 1024.0), - (unsigned long long)prof_cycle_ysurv_count, - prof_cycle_ysurv_bytes / (1024.0 * 1024.0), - surv_pct, - (unsigned long long)prof_pin_count[PROF_SRC_CSTACK], - (unsigned long long)(prof_pin_bytes[PROF_SRC_CSTACK] / 1024), - (unsigned long long)prof_pin_count[PROF_SRC_REGS], - (unsigned long long)(prof_pin_bytes[PROF_SRC_REGS] / 1024), - (unsigned long long)prof_pin_count[PROF_SRC_GENSTACK], - (unsigned long long)(prof_pin_bytes[PROF_SRC_GENSTACK] / 1024), - (unsigned long long)prof_pin_env_interior, - (unsigned long long)prof_pin_los, - (unsigned long long)prof_pin_young, - (unsigned long long)prof_pin_old); - prof_young_count = prof_young_bytes = 0; - memset (prof_pin_count, 0, sizeof (prof_pin_count)); - memset (prof_pin_bytes, 0, sizeof (prof_pin_bytes)); - prof_pin_young = prof_pin_old = 0; - prof_pin_env_interior = prof_pin_los = 0; -} - -static void -profile_report_shutdown(void) -{ - static EJSBool reported = EJS_FALSE; // atexit + GC_ON_SHUTDOWN may both fire - if (reported) return; - reported = EJS_TRUE; - - struct timeval now; - gettimeofday (&now, NULL); - double wall = (now.tv_sec - prof_start_tv.tv_sec) - + (now.tv_usec - prof_start_tv.tv_usec) / 1e6; - _ejs_log ("EJS_GC_PROFILE: totals: allocs=%llu bytes=%.2fMB wall=%.2fs " - "(%.1fMB/s, %.0f allocs/s) collections=%llu total-pause=%.2fms\n", - (unsigned long long)prof_alloc_total_count, - prof_alloc_total_bytes / (1024.0 * 1024.0), wall, - prof_alloc_total_bytes / (1024.0 * 1024.0) / (wall > 0 ? wall : 1), - prof_alloc_total_count / (wall > 0 ? wall : 1), - (unsigned long long)prof_collections, - prof_total_pause_usec / 1000.0); - _ejs_log ("EJS_GC_PROFILE: kinds: primstr=%llu primsym=%llu object=%llu " - "closureenv=%llu\n", - (unsigned long long)prof_kind_count[0], - (unsigned long long)prof_kind_count[1], - (unsigned long long)prof_kind_count[2], - (unsigned long long)prof_kind_count[3]); - for (int i = 1; i < PROF_NBUCKETS; i++) { - if (!prof_alloc_count[i]) continue; - _ejs_log ("EJS_GC_PROFILE: size<=%4d: %llu allocs, %.2fMB requested\n", - 1 << (OBJECT_SIZE_LOW_LIMIT_BITS + i - 1), - (unsigned long long)prof_alloc_count[i], - prof_alloc_bytes[i] / (1024.0 * 1024.0)); - } - if (prof_alloc_count[0]) - _ejs_log ("EJS_GC_PROFILE: LOS: %llu allocs, %.2fMB requested\n", - (unsigned long long)prof_alloc_count[0], - prof_alloc_bytes[0] / (1024.0 * 1024.0)); -} - -// ======================= the nursery ============================ -// -// One dedicated arena; size-class pages inside it are bump-allocated -// (the seam's per-class bump/limit cursors ARE the allocation state — -// emitted code bumps them inline). Minor GC is mostly- -// copying: conservative hits pin young cells in place (established -// FIRST), then every precise slot — root list, module exports, -// remembered-set entries, and the transitive scan through the -// slot-based Scan protocol — evacuates its young referent into the old -// gen, installs a P1 forwarding record, and is rewritten. Young pages -// end the cycle reset (no survivors) or as survivor pages (pins only — -// pins merely delay promotion). The old gen stays mark-sweep. - -EJSHeapContext _ejs_heap; // exported: the per-isolate context (the emitter seam) - -typedef struct { - Arena* nursery_arena; - PageInfo* young_current[EJS_GC_NUM_SIZE_CLASSES]; - EJSList young_pages; // all young pages not currently being bumped - EJSBool verify; // EJS_GC_VERIFY: old-gen barrier-coverage check per minor - size_t young_alloced; // bytes of young pages handed out this cycle - size_t young_budget; // minor-collection trigger (EJS_GC_NURSERY_BUDGET) - // minor worklist (objects whose slots still need processing) - GCObjectPtr* wl; - int wl_count, wl_cap; - // the remset's second buffer. A minor collection SWAPS buffers up - // front and processes the snapshot; slots whose referent stays young - // (pinned) re-append into the live buffer — old→young edges CARRY - // across cycles for as long as the target remains in the nursery. - ejsval** remset_other; - // stats (reported under EJS_GC_PROFILE) - uint64_t minors, minor_usec_total, minor_usec_max; - uint64_t promoted_objs, promoted_bytes, minor_pins, remset_peak, overflow_minors; -} EJSHeapPriv; -static EJSHeapPriv heap_priv; // the private half of the (single) isolate's context - -#define NURSERY_REMSET_CAPACITY (64 * 1024) - -// EJS_GC_MINOR_SPEW=1: per-event tracing for nursery debugging -static EJSBool minor_spew; -#define MINOR_SPEW(...) EJS_MACRO_START if (minor_spew) _ejs_log (__VA_ARGS__); EJS_MACRO_END - -// EJS_GC_WATCH=: log every lifecycle event touching the cell -// containing that address, with a C backtrace (debugging aid for the -// deterministic single-cell corruption hunt) -#include -static uintptr_t gc_watch_addr; -static void -gc_watch_hit(const char* what, void* p) -{ - if (EJS_LIKELY(gc_watch_addr == 0)) return; - if ((uintptr_t)p > gc_watch_addr || gc_watch_addr - (uintptr_t)p >= 256) return; - _ejs_log ("EJS_GC_WATCH: %s cell=%p (minor#%llu, in_minor=%d)\n", - what, p, (unsigned long long)heap_priv.minors, (int)in_minor_gc); - void* frames[24]; - int n = backtrace (frames, 24); - backtrace_symbols_fd (frames, n, 2); -} - -static EJSBool -young_cell_is_allocated(PageInfo* page, uint32_t cell_idx) -{ - return page->page_start + (size_t)cell_idx * page->cell_size < page->bump_ptr; -} - -// the seam cursors are authoritative while a page is being bumped; fold -// them back into the page before any collection looks at bump_ptr -static void -young_flush_bumps(void) -{ - for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) { - if (heap_priv.young_current[i]) - heap_priv.young_current[i]->bump_ptr = _ejs_heap.bump[i]; - } -} - -static void -young_page_retire_current(int idx) -{ - PageInfo* page = heap_priv.young_current[idx]; - if (!page) return; - page->bump_ptr = _ejs_heap.bump[idx]; - _ejs_list_append_node (&heap_priv.young_pages, (EJSListNode*)page); - heap_priv.young_current[idx] = NULL; - _ejs_heap.bump[idx] = _ejs_heap.limit[idx] = NULL; -} - -// grab a fresh page from the nursery arena for class idx, or NULL when -// the nursery is exhausted (the caller runs a minor collection) -static PageInfo* -young_page_install(int idx, size_t cell_size) -{ - Arena* arena = heap_priv.nursery_arena; - PageInfo* info = NULL; - if (in_minor_gc) { - _ejs_log ("GC BUG: young_page_install during a minor collection\n"); - abort(); - } - if (arena->free_pages) { - info = arena->free_pages; - EJS_LIST_DETACH(info, arena->free_pages); - info->cell_size = cell_size; - info->num_cells = CELLS_OF_SIZE(cell_size); - info->num_free_cells = info->num_cells; - } else { - info = alloc_page_from_arena(arena, cell_size); - if (!info) return NULL; - } - info->young = 1; - info->bump_ptr = info->page_start; - heap_priv.young_alloced += PAGE_SIZE; - // colors start at the CURRENT white (a young cell must never read - // as black mid-cycle); allocated-ness comes from the bump rule - memset (info->page_bitmap, cell_white_color(), info->num_cells * sizeof(BitmapCell)); - heap_priv.young_current[idx] = info; - _ejs_heap.bump[idx] = info->page_start; - _ejs_heap.limit[idx] = info->page_end; - return info; -} - -// an emptied young page leaves heap_priv.young_pages for the nursery -// arena's free list (called from _ejs_finalize_obj when a full sweep -// kills a survivor page's last cell) -static void -young_page_freed(PageInfo* info, Arena* arena) -{ - EJS_ASSERT(arena && arena->is_nursery); - _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)info); - info->young = 0; - info->bump_ptr = info->page_start; - EJS_LIST_PREPEND (info, arena->free_pages); -} - -// set when a scan leaves a still-young (pinned) referent behind — the -// dirty owner carries to the next cycle -static EJSBool minor_scan_saw_young; - -static void -minor_wl_push(GCObjectPtr p) -{ - if (heap_priv.wl_count == heap_priv.wl_cap) { - heap_priv.wl_cap = heap_priv.wl_cap ? heap_priv.wl_cap * 2 : 4096; - heap_priv.wl = realloc (heap_priv.wl, heap_priv.wl_cap * sizeof(GCObjectPtr)); - } - heap_priv.wl[heap_priv.wl_count++] = p; -} - -// rewrite an ejsval's payload in place, preserving its NaN-box tag -static inline void -rewrite_slot_payload(ejsval* slot, GCObjectPtr to) -{ - slot->asBits = (slot->asBits & ~EJSVAL_PAYLOAD_MASK) - | ((uint64_t)(uintptr_t)to & EJSVAL_PAYLOAD_MASK); -} - -// After memcpy'ing a cell, SELF-INTERIOR pointers still aim at the old -// cell (found the hard way: every inline-buffer flat string's data -// pointed at poison after promotion). The two classes in the runtime: -// flat strings without an out-of-line buffer (data.flat = self+hdr) and -// small EJSArguments (args = self+sizeof). Anything new that embeds a -// self-pointer must be added here — the planned trace-bitmap redesign -// subsumes this with offset-based addressing. -static void -minor_fixup_evacuated(GCObjectPtr from, GCObjectPtr to, size_t cell_size) -{ - GCObjectHeader h = *(GCObjectHeader*)to; - if (h & EJS_SCAN_TYPE_PRIMSTR) { - EJSPrimString* s = (EJSPrimString*)to; - if (EJS_PRIMSTR_GET_TYPE(s) == EJS_STRING_FLAT) { - char* d = (char*)s->data.flat; - if (d >= (char*)from && d < (char*)from + cell_size) - s->data.flat = (jschar*)((char*)to + (d - (char*)from)); - } - } - else if (h & EJS_SCAN_TYPE_OBJECT) { - EJSObject* o = (EJSObject*)to; - if (o->ops == &_ejs_Arguments_specops) { - EJSArguments* a = (EJSArguments*)o; - char* d = (char*)a->args; - if (d >= (char*)from && d < (char*)from + cell_size) - a->args = (ejsval*)((char*)to + (d - (char*)from)); - } - // shaped ordinary objects with EMBEDDED slot storage (gc-P5 - // single-cell allocation): the slots ejsval points into the - // cell. Shape bits are only ever set on ordinary objects, so - // the header test suffices; dictionary mode (shape 0) keeps - // the map pointer in the union and must not be touched. - else if (((h >> EJS_GC_HEADER_SHAPE_SHIFT) & EJS_GC_HEADER_SHAPE_MASK) - != EJS_SHAPE_DICT - && !EJSVAL_IS_NULL(o->slots)) { - char* d = (char*)EJSVAL_TO_CLOSUREENV_IMPL(o->slots); - if (d >= (char*)from && d < (char*)from + cell_size) - rewrite_slot_payload(&o->slots, - (GCObjectPtr)((char*)to + (d - (char*)from))); - } - } -} - -// allocate an old-gen cell for a promotion. Never triggers collection -// (we are inside one); grows a new arena if need be, aborts loudly on -// genuine OOM. -static GCObjectPtr -old_alloc_cell_for_promotion(size_t cell_size) -{ - int bucket = ffs((int)cell_size) - OBJECT_SIZE_LOW_LIMIT_BITS; - PageInfo* info = (PageInfo*)heap_pages[bucket].head; - while (info && !info->num_free_cells) info = info->next; - if (!info) { - info = alloc_new_page(cell_size); - if (info == NULL) { - _ejs_log ("gc: promotion allocation failed (size %zd)\n", cell_size); - abort(); - } - _ejs_list_prepend_node (&heap_pages[bucket], (EJSListNode*)info); - } - GCObjectPtr rv = alloc_from_page(info); - return rv; -} - -// conservative hit during a minor collection: young targets pin in -// place (never move this cycle) and join the scan worklist once; old -// targets are not this collection's problem -static void -minor_conservative_hit(PageInfo* page, uint32_t cell_idx) -{ - if (!page->young) return; - if (page->young == 1 && !young_cell_is_allocated(page, cell_idx)) return; - if (page->young == 2 && cell_is_free(page->page_bitmap[cell_idx])) return; - BitmapCell cell = page->page_bitmap[cell_idx]; - if (cell_is_black(cell)) return; // already pinned this minor - GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); - if (_ejs_gc_is_forwarded(base)) return; // pins precede evacuation; stale hit - cell_set_black(&page->page_bitmap[cell_idx]); - heap_priv.minor_pins++; - MINOR_SPEW("minor: pin %p\n", base); - gc_watch_hit ("pin", base); - minor_wl_push(base); -} - -#define MAX_GENERATORS 256 -static int generator_count = 0; -static EJSGenerator* generators[MAX_GENERATORS]; - -// walk every gc-frame chain — the running stack's (the -// seam head) plus every suspended generator's saved chain and every -// ACTIVE generator's parked caller segment. Chains are per-stack and -// disjoint; records live in stack frames that stay mapped for exactly -// as long as they are linked (returns unlink, catches re-link their -// own frame past unwound callees, the generator hooks swap heads at -// every stack switch). -// how many young referents the current minor's precise frame walk -// EVACUATED (as opposed to found pinned/forwarded/old) — the direct -// measure that precision is actually moving things (EJS_GC_PROFILE) -static uint64_t gc_frame_moves; - -static void -walk_gc_frames(void (*slot_fn)(ejsval*)) -{ - for (EJSGCFrame* f = (EJSGCFrame*)_ejs_heap.gc_frame_head; f; f = f->prev) - for (uintptr_t i = 0; i < f->count; i++) - slot_fn(&f->slots[i]); - for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) - for (EJSGCFrame* f = (EJSGCFrame*)g->gc_frame_head; f; f = f->prev) - for (uintptr_t i = 0; i < f->count; i++) - slot_fn(&f->slots[i]); - for (int gi = 0; gi < generator_count; gi++) - for (EJSGCFrame* f = (EJSGCFrame*)generators[gi]->caller_gc_frame_head; f; f = f->prev) - for (uintptr_t i = 0; i < f->count; i++) - slot_fn(&f->slots[i]); -} - -// the minor collection's slot callback (the slot-protocol payoff: every precise -// scan — roots, modules, remset, transitive object scan — goes through -// here). Young referents evacuate (or stay pinned); the slot is -// rewritten to the object's final address. -static void -minor_process_slot(ejsval* slot) -{ - ejsval v = *slot; - if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; - GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); - if (p == NULL || !_ejs_gc_is_young(p)) return; - - uint32_t cell_idx; - PageInfo* page = find_page_and_cell(p, &cell_idx); - EJS_ASSERT(page && page->young); - GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); - - if (_ejs_gc_is_forwarded(base)) { - rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(base)); - return; - } - if (cell_is_black(page->page_bitmap[cell_idx])) { - // pinned: stays put, already queued for scanning. The current - // owner must stay dirty so the edge is revisited next cycle. - minor_scan_saw_young = EJS_TRUE; - return; - } - - // evacuate: copy the whole cell, clear YOUNG on the copy (it is - // promoted), forward the old cell, rewrite this slot - GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); - memcpy (to, base, page->cell_size); - // promoted: not young; and not DIRTY — the memcpy'd bit would make - // the carry logic think the copy is already queued (it is not) - *(GCObjectHeader*)to &= ~(EJS_GC_HEADER_YOUNG | EJS_GC_HEADER_DIRTY); - minor_fixup_evacuated(base, to, page->cell_size); - _ejs_gc_forward(base, to); - rewrite_slot_payload(slot, to); - gc_watch_hit ("evacuate-from", base); - MINOR_SPEW("minor: evac %p -> %p (hdr %llx)\n", base, to, (unsigned long long)*(GCObjectHeader*)to); - heap_priv.promoted_objs++; - heap_priv.promoted_bytes += page->cell_size; - minor_wl_push(to); -} - -// evacuate/pin-resolve a RAW GC pointer field (rope/dependent string -// children — the only raw object->object pointers in the heap) -static void -minor_process_primstr_child(EJSPrimString** childp) -{ - GCObjectPtr p = (GCObjectPtr)*childp; - if (p == NULL || !_ejs_gc_is_young(p)) return; - uint32_t cell_idx; - PageInfo* page = find_page_and_cell(p, &cell_idx); - EJS_ASSERT(page && page->young); - GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); - if (_ejs_gc_is_forwarded(base)) { - *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(base); - return; - } - if (cell_is_black(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } - GCObjectPtr to = old_alloc_cell_for_promotion(page->cell_size); - memcpy (to, base, page->cell_size); - // promoted: not young; and not DIRTY — the memcpy'd bit would make - // the carry logic think the copy is already queued (it is not) - *(GCObjectHeader*)to &= ~(EJS_GC_HEADER_YOUNG | EJS_GC_HEADER_DIRTY); - minor_fixup_evacuated(base, to, page->cell_size); - _ejs_gc_forward(base, to); - *childp = (EJSPrimString*)to; - MINOR_SPEW("minor: evac-child %p -> %p\n", base, to); - heap_priv.promoted_objs++; - heap_priv.promoted_bytes += page->cell_size; - minor_wl_push(to); -} - -// scan one object's outgoing edges with minor_process_slot — the exact -// shape of process_worklist's dispatch, on the slot-based protocol -static void -minor_scan_object(GCObjectPtr p) -{ - GCObjectHeader header = *(GCObjectHeader*)p; - if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { - EJSObject* obj = (EJSObject*)p; - if (obj->ops != NULL) - OP(obj,Scan)(obj, minor_process_slot); - } - else if ((header & EJS_SCAN_TYPE_PRIMSTR) != 0) { - EJSPrimString* primStr = (EJSPrimString*)p; - EJSBool child_still_young = EJS_FALSE; - switch (EJS_PRIMSTR_GET_TYPE(primStr)) { - case EJS_STRING_ROPE: - minor_process_primstr_child(&primStr->data.rope.left); - minor_process_primstr_child(&primStr->data.rope.right); - child_still_young = _ejs_gc_is_young(primStr->data.rope.left) - || _ejs_gc_is_young(primStr->data.rope.right); - break; - case EJS_STRING_DEPENDENT: - minor_process_primstr_child(&primStr->data.dependent.dep); - child_still_young = _ejs_gc_is_young(primStr->data.dependent.dep); - break; - case EJS_STRING_FLAT: - break; - } - if (child_still_young) - minor_scan_saw_young = EJS_TRUE; - } - else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) { - minor_process_slot(&((EJSPrimSymbol*)p)->description); - } - else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { - EJSClosureEnv* env = (EJSClosureEnv*)p; - for (uint32_t i = 0; i < env->length; i++) - minor_process_slot(&env->slots[i]); - } -} - -// walk every live OLD cell (arena pages + LOS), calling `fn` on the -// object — the remset-overflow fallback and the EJS_GC_VERIFY check -static void -old_gen_walk(void (*fn)(GCObjectPtr)) -{ - for (int a = 0; a < num_arenas; a++) { - Arena* arena = heap_arenas[a]; - if (!arena || arena->is_nursery) continue; - for (int pg = 0; pg < arena->num_pages; pg++) { - PageInfo* info = arena->page_infos[pg]; - if (!info || info->young) continue; - GCObjectPtr p = info->page_start; - for (int c = 0; c < CELLS_IN_PAGE(info); c++, p += info->cell_size) { - if (cell_is_free(info->page_bitmap[c])) continue; - fn (p); - } - } - } - for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { - if (cell_is_free(lobj->page_info.page_bitmap[0])) continue; - fn (lobj->page_info.page_start); - } -} - -// EJS_GC_PARANOID: reverse-lookup for the sweep's death detector — when -// a young cell dies, name everything that still references it (old gen, -// LOS, roots, modules, the C stack). A hit is a missed barrier/scan of -// that owner; zero hits means the pointer was in-flight in mutator -// state the conservative scan cannot see. -static GCObjectPtr referrer_target; -static const char* referrer_ctx; -static GCObjectPtr referrer_owner; -static int referrer_hits; -static void -referrer_check_slot(ejsval* slot) -{ - ejsval v = *slot; - if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; - if ((GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v) == referrer_target) { - GCObjectHeader oh = referrer_owner ? *(GCObjectHeader*)referrer_owner : 0; - _ejs_log ("EJS_GC_PARANOID: dying young %p still referenced: ctx=%s owner=%p (hdr %llx) slot=%p\n", - referrer_target, referrer_ctx, (void*)referrer_owner, - (unsigned long long)oh, (void*)slot); - referrer_hits++; - } -} -static void -referrer_check_object(GCObjectPtr p) -{ - GCObjectHeader header = *(GCObjectHeader*)p; - referrer_owner = p; - if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { - EJSObject* obj = (EJSObject*)p; - if (obj->ops != NULL) OP(obj,Scan)(obj, referrer_check_slot); - } else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { - EJSClosureEnv* env = (EJSClosureEnv*)p; - for (uint32_t i = 0; i < env->length; i++) - referrer_check_slot(&env->slots[i]); - } else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) { - referrer_check_slot(&((EJSPrimSymbol*)p)->description); - } -} -static int -paranoid_report_referrers(GCObjectPtr p) -{ - referrer_target = p; - referrer_hits = 0; - referrer_ctx = "oldgen"; - old_gen_walk (referrer_check_object); - referrer_ctx = "roots"; - referrer_owner = NULL; - root_registry_foreach (referrer_check_slot); - referrer_ctx = "modules"; - for (int i = 0; i < _ejs_num_modules; i++) { - EJSObject* mod = (EJSObject*)_ejs_modules[i]; - referrer_owner = (GCObjectPtr)mod; - if (mod->ops) OP(mod,Scan)(mod, referrer_check_slot); - } - // raw C-stack sweep: any word whose payload lands inside the dying - // cell counts (boxed or raw, base or interior) - referrer_ctx = "stack"; - referrer_owner = NULL; - void* volatile probe; - for (void** w = (void**)&probe; w < (void**)stack_bottom; w++) { - uintptr_t masked = (uintptr_t)*w & 0x00007fffffffffffULL; - if ((char*)masked >= (char*)p && (char*)masked < (char*)p + 16) { - _ejs_log ("EJS_GC_PARANOID: dying young %p: raw stack word at %p = %p\n", - p, (void*)w, *w); - referrer_hits++; - } - } - return referrer_hits; -} - -// EJS_GC_VERIFY: after the remset has been processed, no live old slot -// may still reference an unforwarded, unpinned young object — such an -// edge is a missed write barrier. Report and abort. -static ejsval* verify_bad_slot; -static void -verify_check_slot(ejsval* slot) -{ - ejsval v = *slot; - if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; - GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); - if (p == NULL || !_ejs_gc_is_young(p)) return; - uint32_t cell_idx; - PageInfo* page = find_page_and_cell(p, &cell_idx); - if (!page) return; - GCObjectPtr base = page->page_start + ((size_t)cell_idx * page->cell_size); - if (_ejs_gc_is_forwarded(base)) return; // will be rewritten by its recorder - if (cell_is_black(page->page_bitmap[cell_idx])) { minor_scan_saw_young = EJS_TRUE; return; } // pinned in place - verify_bad_slot = slot; -} -static void -verify_check_object(GCObjectPtr p) -{ - GCObjectHeader header = *(GCObjectHeader*)p; - if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { - EJSObject* obj = (EJSObject*)p; - if (obj->ops != NULL) - OP(obj,Scan)(obj, verify_check_slot); - if (verify_bad_slot) { - _ejs_log ("EJS_GC_VERIFY: missed write barrier: old object %p (class %s) slot %p holds unpromoted young ref (bits %llx)\n", - p, obj->ops ? obj->ops->class_name : "", - (void*)verify_bad_slot, - (unsigned long long)verify_bad_slot->asBits); - abort(); - } - } - else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { - EJSClosureEnv* env = (EJSClosureEnv*)p; - for (uint32_t i = 0; i < env->length; i++) { - verify_check_slot(&env->slots[i]); - if (verify_bad_slot) { - _ejs_log ("EJS_GC_VERIFY: missed write barrier: old env %p slot %u holds unpromoted young ref\n", p, i); - abort(); - } - } - } - else if ((header & EJS_SCAN_TYPE_PRIMSTR) != 0) { - EJSPrimString* ps = (EJSPrimString*)p; - EJSPrimString* kids[2] = { NULL, NULL }; - switch (EJS_PRIMSTR_GET_TYPE(ps)) { - case EJS_STRING_ROPE: kids[0] = ps->data.rope.left; kids[1] = ps->data.rope.right; break; - case EJS_STRING_DEPENDENT: kids[0] = ps->data.dependent.dep; break; - default: break; - } - for (int k = 0; k < 2; k++) { - if (!kids[k] || !_ejs_gc_is_young(kids[k])) continue; - uint32_t ci; - PageInfo* pg = find_page_and_cell(kids[k], &ci); - if (!pg) continue; - if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) continue; - if (cell_is_black(pg->page_bitmap[ci])) continue; - _ejs_log ("EJS_GC_VERIFY: old primstr %p (type %d) child %d -> unpromoted young %p\n", - p, EJS_PRIMSTR_GET_TYPE(ps), k, (void*)kids[k]); - abort(); - } - } -} - -// the overflow fallback scans every live old object — it must maintain -// the same DIRTY-bit discipline as normal processing (clear, scan, -// re-dirty on remaining pinned-young refs), or bits desync from the -// swapped-away buffer and later stores skip re-queuing forever -static void -minor_scan_object_if_live(GCObjectPtr p) -{ - *(GCObjectHeader*)p &= ~EJS_GC_HEADER_DIRTY; - minor_scan_saw_young = EJS_FALSE; - minor_scan_object(p); - if (minor_scan_saw_young) - _ejs_gc_remember_slow(p); -} - -// EJS_GC_PARANOID: after every minor, walk roots + modules + all live -// heap cells and validate every traceable value: it must resolve to an -// allocated cell whose header carries exactly one scan-type bit. -// Catches corruption at the collection that minted it. -static EJSBool gc_paranoid; -static const char* paranoid_ctx; -static GCObjectPtr paranoid_owner; -static void -paranoid_check_slot(ejsval* slot) -{ - ejsval v = *slot; - if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; - GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); - if (p == NULL) return; - uint32_t ci; - PageInfo* pg = find_page_and_cell(p, &ci); - const char* why = NULL; - if (!pg) return; // static atoms/primstrings live outside the heap - if (0) why = ""; - else if (!cell_is_allocated(pg, ci, pg->page_bitmap[ci])) why = "target cell free"; - else { - GCObjectHeader h = *(GCObjectHeader*)(pg->page_start + (size_t)ci * pg->cell_size); - uint32_t st = (uint32_t)(h & 0xf); - if (st != 1 && st != 2 && st != 4 && st != 8) why = "bad scan type"; - else if (_ejs_gc_is_forwarded(pg->page_start + (size_t)ci * pg->cell_size)) why = "target forwarded"; - } - if (why) { - GCObjectHeader oh = paranoid_owner ? *(GCObjectHeader*)paranoid_owner : 0; - const char* ocls = "?"; - if (paranoid_owner && (oh & EJS_SCAN_TYPE_OBJECT) && ((EJSObject*)paranoid_owner)->ops) - ocls = ((EJSObject*)paranoid_owner)->ops->class_name; - else if (paranoid_owner && (oh & EJS_SCAN_TYPE_CLOSUREENV)) ocls = ""; - else if (paranoid_owner && (oh & EJS_SCAN_TYPE_PRIMSTR)) ocls = ""; - _ejs_log ("EJS_GC_PARANOID [%s]: owner %p (class %s, hdr %llx) slot %p value %llx: %s\n", - paranoid_ctx, (void*)paranoid_owner, ocls, (unsigned long long)oh, - (void*)slot, (unsigned long long)v.asBits, why); - abort(); - } -} -static void -paranoid_check_object(GCObjectPtr p) -{ - paranoid_owner = p; - GCObjectHeader header = *(GCObjectHeader*)p; - if ((header & EJS_SCAN_TYPE_OBJECT) != 0) { - EJSObject* obj = (EJSObject*)p; - if (obj->ops != NULL) OP(obj,Scan)(obj, paranoid_check_slot); - } - else if ((header & EJS_SCAN_TYPE_CLOSUREENV) != 0) { - EJSClosureEnv* env = (EJSClosureEnv*)p; - for (uint32_t i = 0; i < env->length; i++) - paranoid_check_slot(&env->slots[i]); - } - else if ((header & EJS_SCAN_TYPE_PRIMSYM) != 0) - paranoid_check_slot(&((EJSPrimSymbol*)p)->description); -} -static void -paranoid_sweep_check(void) -{ - paranoid_ctx = "roots"; - root_registry_foreach (paranoid_check_slot); - paranoid_ctx = "modules"; - for (int i = 0; i < _ejs_num_modules; i++) { - EJSObject* mod = (EJSObject*)_ejs_modules[i]; - if (mod->ops) OP(mod,Scan)(mod, paranoid_check_slot); - } - paranoid_ctx = "oldgen"; - old_gen_walk (paranoid_check_object); - paranoid_ctx = "young"; - for (PageInfo* page = (PageInfo*)heap_priv.young_pages.head; page; page = page->next) { - GCObjectPtr p = page->page_start; - for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { - EJSBool allocated = (page->young == 1) - ? young_cell_is_allocated(page, (uint32_t)c) - : !cell_is_free(page->page_bitmap[c]); - if (allocated && !_ejs_gc_is_forwarded(p)) - paranoid_check_object(p); - } - } -} - -// A FULL collection frees dead old objects, so every remset/rescan -// entry — slots INTERIOR to old cells — may now dangle into poisoned -// memory (found as 0xfffc_afaf… "object-tagged poison" values read by -// the next minor). Rebuild the whole remembered state from a live -// old-gen walk instead: record every live old→young ejsval slot, re-add -// old strings with young raw children, and drop the LOS-pending list -// (the walk covers LOS objects). Full collections are rare; one extra -// old-gen walk apiece is cheap insurance. -static void -remset_rebuild_after_full_gc(void) -{ - if (!nursery_enabled) return; - // entries are heap OBJECTS: drop the ones the sweep freed, keep the - // rest (their DIRTY bits are still set) - int kept = 0; - for (int i = 0; i < _ejs_heap.remset_count; i++) { - GCObjectPtr o = (GCObjectPtr)_ejs_heap.remset[i]; - uint32_t ci; - PageInfo* pg = find_page_and_cell(o, &ci); - if (!pg || !cell_is_allocated(pg, ci, pg->page_bitmap[ci])) - continue; - _ejs_heap.remset[kept++] = _ejs_heap.remset[i]; - } - _ejs_heap.remset_count = kept; -} - -static void -_ejs_gc_minor_collect(const char* reason) -{ - struct timeval tv0, tv1; - gettimeofday (&tv0, NULL); - - if (in_minor_gc) { - _ejs_log ("GC BUG: reentrant minor collection (reason=%s)\n", reason); - abort(); - } - - young_flush_bumps(); - - in_minor_gc = EJS_TRUE; - heap_priv.minors++; - MINOR_SPEW("minor: begin %llu\n", (unsigned long long)heap_priv.minors); - uint64_t promoted_objs_before = heap_priv.promoted_objs; - uint64_t promoted_bytes_before = heap_priv.promoted_bytes; - uint64_t pins_before = heap_priv.minor_pins; - int remset_used = _ejs_heap.remset_count; - EJSBool overflowed = _ejs_heap.remset_overflowed != 0; - if ((uint64_t)_ejs_heap.remset_count > heap_priv.remset_peak) - heap_priv.remset_peak = _ejs_heap.remset_count; - - // 0. swap the remset buffers up front: EVERY minor_process_slot call - // from here on (roots, modules, remset snapshot, transitive scan) - // may carry an old→pinned-young edge into the LIVE buffer for the - // next cycle — the snapshot is what this cycle processes - void** snapshot = _ejs_heap.remset; - int snapshot_count = _ejs_heap.remset_count; - EJSBool snapshot_overflowed = _ejs_heap.remset_overflowed != 0; - _ejs_heap.remset = heap_priv.remset_other; - heap_priv.remset_other = snapshot; - _ejs_heap.remset_count = 0; - _ejs_heap.remset_overflowed = 0; - - // 1. conservative pins FIRST: C stacks, registers, and EVERY live - // generator's suspended stack + saved contexts (the registry - // walk) — all ambiguous references must pin before any object - // moves; a generator discovered mid-trace would pin too late. - // The shared mark helpers dispatch to minor_conservative_hit - // while in_minor_gc is set. - struct timeval ph0, ph1, ph2, ph3, ph4, ph5; - int gen_count = 0; - gettimeofday (&ph0, NULL); - // each conservative range scan skips the gc-frame records of - // the stack it is scanning — those slots are precise roots, and - // seeing them conservatively would pin every frame-held value - // through its own slot (precision would never move anything) - set_frame_skip_chain(_ejs_heap.gc_frame_head); - mark_thread_stack(); - mark_generator_stacks(); - for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) { - set_frame_skip_chain(g->gc_frame_head); - _ejs_generator_scan_conservative(g); - gen_count++; - } - clear_frame_skip(); - gettimeofday (&ph1, NULL); - - // 1.5 the emitted gc-frame chains — precise, relocatable - // JS-frame roots. Runs AFTER the conservative pins on purpose: - // an object visible to both a gc-frame slot and a C frame (an - // ejsval argument into the very runtime call that triggered this - // minor, say) is pinned, and minor_process_slot leaves pinned - // targets in place — the pin must win or the C frame's copy - // dangles. Everything frame-held and NOT C-visible evacuates - // and gets its slot rewritten. - { - uint64_t promoted_before_frames = heap_priv.promoted_objs; - walk_gc_frames(minor_process_slot); - gc_frame_moves = heap_priv.promoted_objs - promoted_before_frames; - } - - // 2. precise roots: the root registry and module exports evacuate - root_registry_foreach (minor_process_slot); - for (int i = 0; i < _ejs_num_modules; i++) { - EJSObject* mod = (EJSObject*)_ejs_modules[i]; - if (mod->ops == NULL) continue; - OP(mod,Scan)(mod, minor_process_slot); - } - gettimeofday (&ph2, NULL); - - // 3. the remembered set snapshot (or, after overflow, every live - // old object) - if (snapshot_overflowed) { - heap_priv.overflow_minors++; - old_gen_walk (minor_scan_object_if_live); - } else { - for (int i = 0; i < snapshot_count; i++) { - GCObjectPtr owner = (GCObjectPtr)snapshot[i]; - // the object may have died and been swept by an interleaved - // FULL collection; its cell reads FREE then — skip. (A - // reused cell scans as whatever lives there now: merely - // conservative.) - uint32_t ci; - PageInfo* pg = find_page_and_cell(owner, &ci); - if (!pg || !cell_is_allocated(pg, ci, pg->page_bitmap[ci])) - continue; - *(GCObjectHeader*)owner &= ~EJS_GC_HEADER_DIRTY; - minor_scan_saw_young = EJS_FALSE; - minor_scan_object(owner); - // still holds pinned-young references: stay dirty - if (minor_scan_saw_young) - _ejs_gc_remember_slow(owner); - } - } - - // 4. transitive closure. Objects scanned here (promoted copies, - // pinned young, generator roots) that still reference pinned- - // young data must carry a dirty mark so the next cycle revisits - // them (young owners filter out inside remember). - gettimeofday (&ph3, NULL); - while (heap_priv.wl_count > 0) { - GCObjectPtr o = heap_priv.wl[--heap_priv.wl_count]; - minor_scan_saw_young = EJS_FALSE; - minor_scan_object (o); - if (minor_scan_saw_young && !_ejs_gc_is_young(o) - && !(*(GCObjectHeader*)o & EJS_GC_HEADER_DIRTY)) - _ejs_gc_remember_slow(o); - } - gettimeofday (&ph4, NULL); - - // 5. optional barrier-coverage verification - if (heap_priv.verify && !snapshot_overflowed) { - verify_bad_slot = NULL; - old_gen_walk (verify_check_object); - // generator specops re-run their conservative scans inside the - // verify walk (side effect: fresh pins pushed on the worklist); - // drain them before the sweep decides survivor pages - while (heap_priv.wl_count > 0) - minor_scan_object (heap_priv.wl[--heap_priv.wl_count]); - } - - // 6. sweep the young pages: dead cells finalize; forwarded cells are - // just space; pages with pins become survivor pages, the rest reset - for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) - young_page_retire_current(i); - - EJSList survivor_pages; - memset (&survivor_pages, 0, sizeof(survivor_pages)); - PageInfo* page; - while ((page = (PageInfo*)heap_priv.young_pages.head) != NULL) { - for (int sc = 0; sc < EJS_GC_NUM_SIZE_CLASSES; sc++) { - if (heap_priv.young_current[sc] == page - || ((char*)_ejs_heap.bump[sc] > (char*)page->page_start - && (char*)_ejs_heap.bump[sc] <= (char*)page->page_end)) { - _ejs_log ("GC BUG: sweeping page %p that is still active for class %d (bump=%p)\n", - page->page_start, sc, _ejs_heap.bump[sc]); - abort(); - } - } - int survivors = 0; - GCObjectPtr p = page->page_start; - for (int c = 0; c < CELLS_IN_PAGE(page); c++, p += page->cell_size) { - EJSBool allocated = (page->young == 1) - ? young_cell_is_allocated(page, (uint32_t)c) - : !cell_is_free(page->page_bitmap[c]); - if (!allocated) { cell_set_free(&page->page_bitmap[c]); continue; } - if (_ejs_gc_is_forwarded(p)) { - // evacuated: the space is reusable; poison it now that - // every slot has been processed - gc_watch_hit ("sweep-poison-forwarded", p); - memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison - cell_set_free(&page->page_bitmap[c]); - continue; - } - if (cell_is_black(page->page_bitmap[c])) { - // pinned survivor: stays young, stays put; back to white - // so the next cycle (minor or full) sees it fresh - cell_set_white(&page->page_bitmap[c]); - cell_set_allocated(&page->page_bitmap[c]); - survivors++; - continue; - } - MINOR_SPEW("minor: free %p (hdr %llx)\n", p, (unsigned long long)*(GCObjectHeader*)p); - if (gc_paranoid) { - // who still references this about-to-die young object? - // (reverse lookup across every location the minor is - // supposed to have processed) - if (paranoid_report_referrers(p) > 0) - abort(); - } - gc_watch_hit ("sweep-poison-dead", p); - finalize_object(p); - memset (p, 0xa7, page->cell_size); // NOT 0xaf: bit 59 (FORWARDED) must stay clear in poison - cell_set_free(&page->page_bitmap[c]); - } - _ejs_list_detach_node (&heap_priv.young_pages, (EJSListNode*)page); - if (survivors == 0) { - page->young = 0; - page->bump_ptr = page->page_start; - page->num_free_cells = page->num_cells; - EJS_LIST_PREPEND(page, heap_priv.nursery_arena->free_pages); - } else { - page->young = 2; - page->num_free_cells = page->num_cells - survivors; - _ejs_list_append_node (&survivor_pages, (EJSListNode*)page); - } - } - heap_priv.young_pages = survivor_pages; - gettimeofday (&ph5, NULL); - - // 7. cycle accounting (the remset swapped/reset in step 0; carried - // edges are already in the live buffer); promoted bytes feed the - // FULL collection trigger (they are old-gen growth) - heap_priv.young_alloced = 0; - alloc_size += heap_priv.promoted_bytes - promoted_bytes_before; - - // seam/private-state consistency: every class was retired in step 6; - // nothing may have reinstalled a bump cursor mid-minor - for (int sc = 0; sc < EJS_GC_NUM_SIZE_CLASSES; sc++) { - if (_ejs_heap.bump[sc] != NULL || heap_priv.young_current[sc] != NULL) { - _ejs_log ("GC BUG: minor end: class %d seam desync (bump=%p current=%p)\n", - sc, _ejs_heap.bump[sc], (void*)heap_priv.young_current[sc]); - abort(); - } - } - - MINOR_SPEW("minor: end %llu\n", (unsigned long long)heap_priv.minors); - in_minor_gc = EJS_FALSE; - - gettimeofday (&tv1, NULL); - uint64_t usec = (tv1.tv_sec - tv0.tv_sec) * 1000000ULL + (tv1.tv_usec - tv0.tv_usec); - heap_priv.minor_usec_total += usec; - if (usec > heap_priv.minor_usec_max) heap_priv.minor_usec_max = usec; - if (gc_paranoid) - paranoid_sweep_check(); - if (gc_profile) { -#define PHUS(a,b) (((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec)) - _ejs_log ("EJS_GC_PROFILE: minor#%llu reason=%s pause=%.3fms promoted=%llu/%lluKB pins=%llu gcframe_moves=%llu remset=%d gens=%d phases[pins=%lld roots=%lld dirty=%lld wl=%lld sweep=%lld]us%s\n", - (unsigned long long)heap_priv.minors, reason, usec / 1000.0, - (unsigned long long)(heap_priv.promoted_objs - promoted_objs_before), - (unsigned long long)((heap_priv.promoted_bytes - promoted_bytes_before) / 1024), - (unsigned long long)(heap_priv.minor_pins - pins_before), - (unsigned long long)gc_frame_moves, - remset_used, gen_count, - (long long)PHUS(ph0,ph1), (long long)PHUS(ph1,ph2), (long long)PHUS(ph2,ph3), - (long long)PHUS(ph3,ph4), (long long)PHUS(ph4,ph5), - overflowed ? " OVERFLOW" : ""); -#undef PHUS - } - - // promotions grow the old gen; the policy may schedule a full - gc_policy (GC_POLICY_AFTER_MINOR, NULL); -} - -// the young allocation slow path: refill the class's bump page, running -// a minor collection when the nursery is exhausted -static GCObjectPtr -young_alloc_slow(int idx, size_t cell_size, EJSScanType scan_type) -{ - young_page_retire_current(idx); - // the budget bounds the per-minor sweep (pause target <1ms) — the - // arena is the hard capacity, the budget the soft trigger - if (heap_priv.young_alloced >= heap_priv.young_budget) - _ejs_gc_minor_collect("nursery budget"); - if (!young_page_install(idx, cell_size)) { - _ejs_gc_minor_collect("nursery exhausted"); - if (!young_page_install(idx, cell_size)) { - // nursery still full (all survivor pages): give up on the - // nursery for this allocation and take the old path - return NULL; - } - } - void* p = _ejs_heap.bump[idx]; - _ejs_heap.bump[idx] = (char*)p + cell_size; - memset (p, 0, cell_size); - *(GCObjectHeader*)p = scan_type | EJS_GC_HEADER_YOUNG; - return p; -} - -// Full collections see young pages too. Active (bump-rule) pages have -// no valid FREE bits or num_free_cells, so normalize them to -// bitmap-authoritative survivor form first: cells below the bump are -// allocated, the rest free, and the page leaves bump service. After -// this the existing mark/sweep machinery handles them verbatim (their -// objects remain YOUNG by address range; the next minor collection -// evacuates or re-pins whatever survives the full GC). -static void -young_normalize_for_full_gc(void) -{ - if (!nursery_enabled) return; - young_flush_bumps(); - for (int i = 0; i < EJS_GC_NUM_SIZE_CLASSES; i++) - young_page_retire_current(i); - for (PageInfo* page = (PageInfo*)heap_priv.young_pages.head; page; page = page->next) { - if (page->young != 1) continue; - int allocated = 0; - for (int c = 0; c < CELLS_IN_PAGE(page); c++) { - if (young_cell_is_allocated(page, (uint32_t)c)) { - cell_set_allocated(&page->page_bitmap[c]); - allocated++; - } else { - cell_set_free(&page->page_bitmap[c]); - } - } - page->num_free_cells = page->num_cells - allocated; - page->young = 2; - } - heap_priv.young_alloced = 0; -} - -static void -nursery_init(void) -{ - // nursery ON by default (gate decision 2026-07-25); - // EJS_GC_NURSERY=off (or =0) selects the old collector for A/B. - { - char* e = getenv("EJS_GC_NURSERY"); - nursery_enabled = !(e && (strcmp(e, "off") == 0 || strcmp(e, "0") == 0)); - } - heap_priv.verify = getenv("EJS_GC_VERIFY") != NULL; - minor_spew = getenv("EJS_GC_MINOR_SPEW") != NULL; - gc_paranoid = getenv("EJS_GC_PARANOID") != NULL; - if (getenv("EJS_GC_WATCH")) - gc_watch_addr = (uintptr_t)strtoull(getenv("EJS_GC_WATCH"), NULL, 16); - // 1MB balances pause and throughput (measured 2026-07-25): minor p99 - // ~1.3ms on the bench corpus (512KB reaches 0.68ms at ~10% self- - // compile cost; 4MB buys self-compile ~3% at ~5ms p99) - heap_priv.young_budget = 1024 * 1024; - char* budget_env = getenv("EJS_GC_NURSERY_BUDGET"); - if (budget_env) heap_priv.young_budget = (size_t)atoll(budget_env); - if (!nursery_enabled) return; - - Arena* arena = arena_new(); - if (!arena) { - _ejs_log ("gc: could not allocate the nursery arena; nursery disabled\n"); - nursery_enabled = EJS_FALSE; - return; - } - arena->is_nursery = EJS_TRUE; - heap_priv.nursery_arena = arena; - _ejs_heap.nursery_base = (void*)arena; - _ejs_heap.nursery_end = arena->end; - _ejs_heap.remset = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); - _ejs_heap.remset_capacity = NURSERY_REMSET_CAPACITY; - heap_priv.remset_other = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); -} -// ===================== end nursery ========================================= - -static void -sweep_heap() -{ -#if spew - int pages_visited = 0; - int pages_skipped = 0; -#endif - - // sweep the entire heap, freeing white nodes - for (int a = 0, e = num_arenas; a < e; a ++) { - Arena* arena = heap_arenas[a]; - - if (!arena) - continue; - - for (int p = 0, pe = arena->num_pages; p < pe; p++) { - PageInfo *info = arena->page_infos[p]; - - if (info->num_free_cells == info->num_cells) { -#if spew - pages_skipped++; -#endif - } - else { -#if spew - pages_visited ++; -#endif - - for (int c = 0, ce = info->num_cells; c < ce; c ++) { - BitmapCell cell = info->page_bitmap[c]; - - if (cell_is_free(cell)) - continue; - - total_objs++; - - if (cell_is_white(cell)) { - white_objs++; - - GCObjectPtr gcobj = (GCObjectPtr)(info->page_start + c * info->cell_size); - _ejs_finalize_obj(gcobj, arena, info, c); - } - } - } - } - } - - // sweep the large object store - SPEW(2, _ejs_log ("sweeping los: ")); - LargeObjectInfo *lobj = los_list; - while (lobj) { - large_objs ++; - PageInfo *info = &lobj->page_info; - BitmapCell cell = info->page_bitmap[0]; - LargeObjectInfo *next = lobj->next; - if (cell_is_white(cell)) { - // SPEW(2, { _ejs_log ("l"); fflush(stderr); }); - white_objs++; - - EJS_LIST_DETACH(lobj, los_list); - _ejs_finalize_obj(info->page_start, NULL, info, 0); - } - else { - // SPEW(2, { _ejs_log ("L"); fflush(stderr); }); - } - lobj = next; - } - SPEW(2, { _ejs_log ("\n"); }); -} - -static void -mark_root_slot(ejsval* root) -{ - num_roots++; - ejsval rootval = *root; - if (!EJSVAL_IS_GCTHING_IMPL(rootval)) - return; - GCObjectPtr root_ptr = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(rootval); - if (root_ptr == NULL) - return; - uint32_t cell_idx; - PageInfo* page = find_page_and_cell(root_ptr, &cell_idx); - if (!page) - return; - - BitmapCell cell = page->page_bitmap[cell_idx]; - if (cell_is_free(cell)) return; // skip free cells - if (!cell_is_white(cell)) return; // skip pointers to gray/black cells - WORKLIST_PUSH_AND_GRAY_CELL(root_ptr, page->page_bitmap[cell_idx]); -} - -static void -mark_from_roots() -{ - SPEW (2, _ejs_log ("marking from roots")); - root_registry_foreach (mark_root_slot); - SPEW (2, _ejs_log ("done marking from roots")); -} - -static void -mark_from_modules() -{ - SPEW(2, _ejs_log ("marking from module exotics")); - - for (int i = 0; i < _ejs_num_modules; i ++) { - EJSObject* mod = (EJSObject*)_ejs_modules[i]; - // modules are static globals whose object headers aren't set up - // until _ejs_require_init; if a collection happens before that - // (e.g. EJS_GC_EVERY_N_ALLOC during _ejs_init) there's nothing to - // scan yet. - if (mod->ops == NULL) - continue; - _scan_from_ejsobject(mod); - } -} - -#if TARGET_CPU_ARM -#define MARK_REGISTERS EJS_MACRO_START \ - GCObjectPtr __r0, __r1, __r2, __r3, __r4, __r5, __r6, __r7, __r8, __r9, __r10, __r11, __r12, __end; \ - __asm ("str r0, %0; str r1, %1; str r2, %2; str r3, %3; str r4, %4; str r5, %5; str r6, %6;" \ - "str r7, %7; str r8, %8; str r9, %9; str r10, %10; str r11, %11; str r12, %12;" \ - : "=m"(__r0), "=m"(__r1), "=m"(__r2), "=m"(__r3), "=m"(__r4), \ - "=m"(__r5), "=m"(__r6), "=m"(__r7), "=m"(__r8), "=m"(__r9), \ - "=m"(__r10), "=m"(__r11), "=m"(__r12)); \ - \ - mark_pointers_in_range(&__end, &__r0); \ - EJS_MACRO_END -#elif TARGET_CPU_ARM64 -// spill the callee-saved registers (x19-x28, plus fp) and treat them as -// roots. code compiled by ejs (opt -O2) keeps live ejsvals in callee-saved -// registers across calls, and the mostly -O0 runtime doesn't reliably save -// all of them anywhere the stack scan would see. (an empty MARK_REGISTERS -// here let live objects be collected and their cells reused -> heap -// corruption.) -#define MARK_REGISTERS EJS_MACRO_START \ - GCObjectPtr __regs[21]; \ - __asm volatile ("stp x19, x20, [%0, #0]\n\t" \ - "stp x21, x22, [%0, #16]\n\t" \ - "stp x23, x24, [%0, #32]\n\t" \ - "stp x25, x26, [%0, #48]\n\t" \ - "stp x27, x28, [%0, #64]\n\t" \ - "str x29, [%0, #80]\n\t" \ - /* llvm will spill gprs into the callee-saved simd \ - registers under pressure, so scan those too */ \ - "stp d8, d9, [%0, #88]\n\t" \ - "stp d10, d11, [%0, #104]\n\t" \ - "stp d12, d13, [%0, #120]\n\t" \ - "stp d14, d15, [%0, #136]" \ - : : "r"(__regs) : "memory"); \ - __regs[19] = __regs[20] = NULL; \ - /* mark_pointers_in_range scans [low, high-1) */ \ - mark_pointers_in_range(__regs, __regs + 21); \ - EJS_MACRO_END -#elif TARGET_CPU_AMD64 -#define MARK_REGISTERS EJS_MACRO_START \ - GCObjectPtr __rax, __rbx, __rcx, __rdx, __rsi, __rdi, __rbp, __rsp, __r8, __r9, __r10, __r11, __r12, __r13, __r14, __r15, __end; \ - __asm ("movq %%rax, %0; movq %%rbx, %1; movq %%rcx, %2; movq %%rdx, %3; movq %%rsi, %4;" \ - "movq %%rdi, %5; movq %%rbp, %6; movq %%rsp, %7; movq %%r8, %8; movq %%r9, %9;" \ - "movq %%r10, %10; movq %%r11, %11; movq %%r12, %12; movq %%r13, %13; movq %%r14, %14; movq %%r15, %15;" \ - : "=m"(__rax), "=m"(__rbx), "=m"(__rcx), "=m"(__rdx), "=m"(__rsi), \ - "=m"(__rdi), "=m"(__rbp), "=m"(__rsp), "=m"(__r8), "=m"(__r9), \ - "=m"(__r10), "=m"(__r11), "=m"(__r12), "=m"(__r13), "=m"(__r14), "=m"(__r15)); \ - \ - mark_pointers_in_range(&__end, &__rax); \ - EJS_MACRO_END -#elif TARGET_CPU_X86 -#define MARK_REGISTERS // just keep the build limping along -#else -#error "put code here to mark registers" -#endif - -// (MAX_GENERATORS / generators[] / generator_count moved above -// walk_gc_frames, which walks the active chain's parked caller -// segments) - -void -_ejs_gc_push_generator(EJSGenerator* gen) -{ - if (generator_count >= MAX_GENERATORS) { - _ejs_log ("too many nested generators (max %d)\n", MAX_GENERATORS); - abort(); - } - generators[generator_count++] = gen; - // keep the barrier's transient-slot bound on the CURRENT stack - _ejs_heap.current_stack_end = gen->stack + gen->stack_size; - // swap in this stack's gc-frame chain; the caller's segment - // parks on the generator until the matching pop - gen->caller_gc_frame_head = _ejs_heap.gc_frame_head; - _ejs_heap.gc_frame_head = gen->gc_frame_head; - gen->gc_frame_head = NULL; // the live chain is the seam head now -} - -void -_ejs_gc_pop_generator() -{ - generator_count--; - EJSGenerator* gen = generators[generator_count]; - _ejs_heap.current_stack_end = generator_count > 0 - ? generators[generator_count - 1]->stack + generators[generator_count - 1]->stack_size - : (void*)stack_bottom; - // park this stack's chain on the generator (walked while - // suspended), restore the caller's segment - gen->gc_frame_head = _ejs_heap.gc_frame_head; - _ejs_heap.gc_frame_head = gen->caller_gc_frame_head; - gen->caller_gc_frame_head = NULL; -} - -static void -mark_thread_stack() -{ - prof_pin_source = PROF_SRC_REGS; - MARK_REGISTERS; - prof_pin_source = PROF_SRC_CSTACK; - - GCObjectPtr stack_top = NULL; - - // The CURRENT machine stack. When the mutator is running on a - // generator's malloc'd stack (collections happen inside - // _ejs_gc_alloc, which generator bodies call), [&stack_top, - // stack_bottom) is NOT a stack range — it spans from the malloc heap - // to the main stack across unmapped memory. Scan only up to the - // running generator's stack end; mark_generator_stacks covers the - // suspended caller segments. - void* high = (void*)stack_bottom; - if (generator_count > 0) { - EJSGenerator* running = generators[generator_count - 1]; - high = running->stack + running->stack_size; - } - - mark_ejsvals_in_range(((void*)&stack_top) + sizeof(GCObjectPtr), high); -} - -// mark a known heap object as a root (page cell or LOS both resolve -// through find_page_and_cell; the pointer must be an object base) -static void minor_wl_push(GCObjectPtr p); -static void -mark_object_root(GCObjectPtr ptr) -{ - uint32_t cell_idx; - PageInfo* page = find_page_and_cell(ptr, &cell_idx); - if (!page) - return; - BitmapCell cell = page->page_bitmap[cell_idx]; - if (!cell_is_allocated(page, cell_idx, cell)) - return; - if (in_minor_gc) { - // minor collections: a young root pins; an old root's slots may hold - // young references, so queue it for the precise minor scan - // (duplicates are harmless — evacuation is idempotent) - if (page->young) minor_conservative_hit(page, cell_idx); - else minor_wl_push(ptr); - return; - } - if (!cell_is_white(cell)) - return; - WORKLIST_PUSH_AND_GRAY_CELL(ptr, page->page_bitmap[cell_idx]); -} - -// The chain of ACTIVE generators (generators whose bodies are on the -// current stack chain; push on start/resume, pop on yield/completion — -// generators[generator_count-1] owns the stack we are executing on). -// mark_thread_stack scans the running stack; this covers the rest: -// -// - each active generator OBJECT is a root for the cycle (its specop -// scan conservatively marks its own suspended frames and both saved -// ucontexts, i.e. the register files); -// - the SUSPENDED CALLER segment behind each swap-in: frames from the -// caller_stack_top recorded at the resume site up to that caller's -// stack end — the main stack (stack_bottom) for the outermost -// generator, the parent generator's stack end for nested ones. -// -// Suspended generators NOT in the chain need nothing here: if their -// object is reachable its scan covers their stack; if it is not, nothing -// on that stack is reachable either. -static void -mark_generator_stacks() -{ - prof_pin_source = PROF_SRC_CSTACK; // the suspended segments ARE C stack - for (int i = 0; i < generator_count; i++) { - EJSGenerator* gen = generators[i]; - - mark_object_root((GCObjectPtr)gen); - - void* seg_high = (i == 0) ? (void*)stack_bottom - : generators[i - 1]->stack + generators[i - 1]->stack_size; - if (gen->caller_stack_top) { - // this caller segment's frames are the chain parked - // at push time (minor only; a full GC leaves skips empty) - if (in_minor_gc) set_frame_skip_chain(gen->caller_gc_frame_head); - mark_ejsvals_in_range(gen->caller_stack_top, seg_high); - if (in_minor_gc) clear_frame_skip(); - } - } -} - -static void -process_worklist() -{ - GCObjectPtr p; - while ((p = _ejs_gc_worklist_pop())) { - set_black (p); - GCObjectHeader* headerp = (GCObjectHeader*)p; - if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) - _scan_from_ejsobject((EJSObject*)p); - else if ((*headerp & EJS_SCAN_TYPE_PRIMSTR) != 0) - _scan_from_ejsprimstr((EJSPrimString*)p); - else if ((*headerp & EJS_SCAN_TYPE_PRIMSYM) != 0) - _scan_from_ejsprimsym((EJSPrimSymbol*)p); - else if ((*headerp & EJS_SCAN_TYPE_CLOSUREENV) != 0) - _scan_from_ejsclosureenv((EJSClosureEnv*)p); - } - - EJS_ASSERT(work_list.list == NULL); -} - -// ============== mostly-copying major compaction (gc-P4) =================== -// -// Mark-sweep never shrinks: live old-gen cells sit wherever history put -// them and sparse pages hold whole pages hostage for a cell or two. -// After the sweep, this pass evacuates the live UNPINNED cells of the -// sparsest pages of each size class into the free space of the denser -// ones, rewrites every reference through the P1 forwarding records, and -// returns the emptied pages to their arenas — the heap actually shrinks, -// and the proportional growth target then adapts downward. -// -// Pinned cells sweep in place, exactly like the minor's young pins: -// conservative hits (C stack, spilled registers, generator stacks) set -// PINNED during marking, and every registered generator object pins too -// (the registry is an intrusive list of raw pointers). LOS objects -// never move. EJS_GC_COMPACT=off restores plain mark-sweep for A/B and -// differential runs. -static uint64_t compact_moved_objs, compact_moved_bytes, compact_freed_pages; - -static void -compact_fixup_slot(ejsval* slot) -{ - ejsval v = *slot; - if (!EJSVAL_IS_TRACEABLE_IMPL(v)) return; - GCObjectPtr p = (GCObjectPtr)EJSVAL_TO_GCTHING_IMPL(v); - if (p == NULL) return; - // boxed payloads are object bases, and statics outside the heap have - // headers too, so the forwarded-bit read is always safe - if (_ejs_gc_is_forwarded(p)) - rewrite_slot_payload(slot, _ejs_gc_forwarding_addr(p)); -} - -static void -compact_fixup_primstr_child(EJSPrimString** childp) -{ - GCObjectPtr p = (GCObjectPtr)*childp; - if (p && _ejs_gc_is_forwarded(p)) - *childp = (EJSPrimString*)_ejs_gc_forwarding_addr(p); -} - -static void -compact_fixup_object(GCObjectPtr p) -{ - GCObjectHeader* h = (GCObjectHeader*)p; - if (*h & EJS_GC_HEADER_FORWARDED) - return; // an evacuated source; its copy is walked on its own page - *h &= ~EJS_GC_HEADER_PINNED; // pins are per-cycle - if ((*h & EJS_SCAN_TYPE_OBJECT) != 0) { - EJSObject* obj = (EJSObject*)p; - if (obj->ops != NULL) - OP(obj,Scan)(obj, compact_fixup_slot); - } - else if ((*h & EJS_SCAN_TYPE_PRIMSTR) != 0) { - EJSPrimString* ps = (EJSPrimString*)p; - switch (EJS_PRIMSTR_GET_TYPE(ps)) { - case EJS_STRING_ROPE: - compact_fixup_primstr_child(&ps->data.rope.left); - compact_fixup_primstr_child(&ps->data.rope.right); - break; - case EJS_STRING_DEPENDENT: - compact_fixup_primstr_child(&ps->data.dependent.dep); - break; - case EJS_STRING_FLAT: - break; - } - } - else if ((*h & EJS_SCAN_TYPE_PRIMSYM) != 0) - compact_fixup_slot(&((EJSPrimSymbol*)p)->description); - else if ((*h & EJS_SCAN_TYPE_CLOSUREENV) != 0) { - EJSClosureEnv* env = (EJSClosureEnv*)p; - for (uint32_t i = 0; i < env->length; i++) - compact_fixup_slot(&env->slots[i]); - } -} - -static EJSBool -compact_page_has_pins(PageInfo* pg) -{ - GCObjectPtr p = pg->page_start; - for (int c = 0; c < pg->num_cells; c++, p += pg->cell_size) - if (!cell_is_free(pg->page_bitmap[c]) - && (*(GCObjectHeader*)p & EJS_GC_HEADER_PINNED)) - return EJS_TRUE; - return EJS_FALSE; -} - -// destination cell in `bucket`: first page (from the cursor on) with -// free capacity. Sources were detached from the bucket list before -// evacuation, so every listed page qualifies. The selection accounting -// guarantees capacity; running dry is a bug. -static GCObjectPtr -compact_alloc_dest(int bucket, PageInfo** cursor, PageInfo** dest_page) -{ - PageInfo* pg = *cursor ? *cursor : (PageInfo*)heap_pages[bucket].head; - while (pg && !pg->num_free_cells) - pg = pg->next; - if (!pg) { - _ejs_log ("GC BUG: compaction ran out of destination space (bucket %d)\n", bucket); - abort(); - } - *cursor = pg; - *dest_page = pg; - return alloc_from_page(pg); -} - -static void -compact_evacuate_page(int bucket, PageInfo* pg, PageInfo** cursor) -{ - GCObjectPtr from = pg->page_start; - for (int c = 0; c < pg->num_cells; c++, from += pg->cell_size) { - if (cell_is_free(pg->page_bitmap[c])) - continue; - PageInfo* dest_page; - GCObjectPtr to = compact_alloc_dest(bucket, cursor, &dest_page); - memcpy (to, from, pg->cell_size); - // the copy is live THIS cycle: keep it marked so the coming - // color flip turns it white with every other survivor - cell_set_black(&dest_page->page_bitmap[PTR_TO_CELL(to, dest_page)]); - minor_fixup_evacuated(from, to, pg->cell_size); - _ejs_gc_forward(from, to); - gc_watch_hit ("compact-evacuate-from", from); - compact_moved_objs++; - compact_moved_bytes += pg->cell_size; - } -} - -typedef struct { PageInfo* page; int live; } CompactPageStat; - -static int -compact_stat_cmp(const void* a, const void* b) -{ - return ((const CompactPageStat*)a)->live - ((const CompactPageStat*)b)->live; -} - -static void -compact_old_gen(void) -{ - // every registered generator pins: the registry reaches them through - // raw intrusive pointers (reg_next/reg_prev), and their machine - // state is re-scanned conservatively by their specops - for (EJSGenerator* g = _ejs_generator_registry; g; g = g->reg_next) - *(GCObjectHeader*)g |= EJS_GC_HEADER_PINNED; - - uint64_t moved_before = compact_moved_objs; - uint64_t freed_before = compact_freed_pages; - - EJSList evac_pages; - memset (&evac_pages, 0, sizeof(evac_pages)); - - // 1. selection + evacuation, per size class: sparse-first, evacuate - // while the rest of the class has room - for (int bucket = 0; bucket < HEAP_PAGELISTS_COUNT; bucket++) { - int count = 0; - for (PageInfo* pg = (PageInfo*)heap_pages[bucket].head; pg; pg = pg->next) - count++; - if (count < 2) - continue; - - CompactPageStat* stats = (CompactPageStat*)malloc (count * sizeof(CompactPageStat)); - size_t total_free = 0; - int n = 0; - for (PageInfo* pg = (PageInfo*)heap_pages[bucket].head; pg; pg = pg->next) { - stats[n].page = pg; - stats[n].live = pg->num_cells - pg->num_free_cells; - n++; - total_free += pg->num_free_cells; - } - qsort (stats, n, sizeof(CompactPageStat), compact_stat_cmp); - - // choose the COMPLETE source set first, sparse-first: a page - // accepted as a source leaves the destination pool, and the - // remaining pool must hold every already-accepted live cell - // plus this page's. (Selecting and evacuating in one pass let - // an early DESTINATION later be picked as a source via its - // stale live count — evacuating more cells than the accounting - // reserved space for.) - size_t dest_free = total_free; - size_t src_live = 0; - EJSList src_pages; - memset (&src_pages, 0, sizeof(src_pages)); - for (int i = 0; i < n; i++) { - PageInfo* pg = stats[i].page; - size_t live = (size_t)stats[i].live; - if (live == 0) - continue; // the sweep freelists empties; belt only - if (dest_free - pg->num_free_cells < src_live + live) - break; // the sparsest candidate doesn't fit; denser ones won't either - if (compact_page_has_pins(pg)) - continue; // pinned cells sweep in place; the page stays a destination - _ejs_list_detach_node (&heap_pages[bucket], (EJSListNode*)pg); - _ejs_list_append_node (&src_pages, (EJSListNode*)pg); - dest_free -= pg->num_free_cells; - src_live += live; - } - - // sources are off the bucket list now: every listed page is a - // pure destination, so the cursor can walk it freely - PageInfo* cursor = NULL; - PageInfo* src; - while ((src = (PageInfo*)src_pages.head) != NULL) { - _ejs_list_detach_node (&src_pages, (EJSListNode*)src); - compact_evacuate_page (bucket, src, &cursor); - _ejs_list_append_node (&evac_pages, (EJSListNode*)src); - } - free (stats); - } - - // 2. fixup: rewrite every reference that can name a moved cell, and - // clear the cycle's pins while walking the live set. Runs even - // when nothing was evacuated — the pins must reset either way. - root_registry_foreach (compact_fixup_slot); - for (int i = 0; i < _ejs_num_modules; i++) { - EJSObject* mod = (EJSObject*)_ejs_modules[i]; - if (mod->ops) - OP(mod,Scan)(mod, compact_fixup_slot); - } - // gc-frame slots' referents were all conservatively pinned (full GC - // never skips frame records), so these rewrites are no-ops today; - // walked anyway so precision changes can't silently break this pass - walk_gc_frames(compact_fixup_slot); - for (int i = 0; i < _ejs_heap.remset_count; i++) { - GCObjectPtr o = (GCObjectPtr)_ejs_heap.remset[i]; - if (_ejs_gc_is_forwarded(o)) - _ejs_heap.remset[i] = _ejs_gc_forwarding_addr(o); - } - old_gen_walk (compact_fixup_object); // old pages (sources skip via FORWARDED) + LOS - for (PageInfo* pg = (PageInfo*)heap_priv.young_pages.head; pg; pg = pg->next) { - GCObjectPtr p = pg->page_start; - for (int c = 0; c < CELLS_IN_PAGE(pg); c++, p += pg->cell_size) - if (!cell_is_free(pg->page_bitmap[c])) - compact_fixup_object(p); - } - - // 3. release the sources: nothing reads the forwarding records - // anymore; the pages go back to their arenas. No finalizers run — - // the objects live on at their new addresses. - PageInfo* pg; - while ((pg = (PageInfo*)evac_pages.head) != NULL) { - _ejs_list_detach_node (&evac_pages, (EJSListNode*)pg); - memset (pg->page_start, 0xa7, PAGE_SIZE); // 0xa7: FORWARDED must stay clear in poison - memset (pg->page_bitmap, CELL_FREE, pg->num_cells * sizeof(BitmapCell)); - pg->num_free_cells = pg->num_cells; - pg->bump_ptr = pg->page_start; - Arena* arena = (Arena*)PTR_TO_ARENA(pg->page_start); - EJS_LIST_PREPEND (pg, arena->free_pages); - compact_freed_pages++; - } - - if (gc_profile) - _ejs_log ("EJS_GC_PROFILE: compact: moved=%llu freed-pages=%llu\n", - (unsigned long long)(compact_moved_objs - moved_before), - (unsigned long long)(compact_freed_pages - freed_before)); -} -// ============== end mostly-copying major compaction ====================== - -static void -_ejs_gc_collect_inner(EJSBool shutting_down) -{ -#if gc_timings > 1 - struct timeval tvbefore, tvafter; -#endif - - // very simple stop the world collector - SPEW(1, _ejs_log ("collection started\n")); - - num_roots = 0; - white_objs = 0; - large_objs = 0; - total_objs = 0; - - // full collections need young pages in bitmap-authoritative - // form (active bump pages have no valid FREE bits or counts) - young_normalize_for_full_gc(); - -#if gc_timings > 1 - gettimeofday (&tvbefore, NULL); -#endif - - struct timeval prof_tv_begin, prof_tv_end; - if (gc_profile) - gettimeofday (&prof_tv_begin, NULL); - - struct timeval fg[8]; - if (!shutting_down) { - gettimeofday (&fg[0], NULL); - mark_from_roots(); - - total_objs = num_roots; - - mark_from_modules(); - gettimeofday (&fg[1], NULL); - - mark_thread_stack(); - - mark_generator_stacks(); - gettimeofday (&fg[2], NULL); - - // dirty objects await their deferred minor scan and may - // hold the only reference to young data — root them - for (int i = 0; i < _ejs_heap.remset_count; i++) - mark_object_root((GCObjectPtr)_ejs_heap.remset[i]); - gettimeofday (&fg[3], NULL); - - process_worklist(); - gettimeofday (&fg[4], NULL); - - // survival + pin census must walk the heap BEFORE the - // sweep frees the white cells - if (gc_profile) - profile_pre_sweep(); - gettimeofday (&fg[5], NULL); - if (gc_profile) { -#define FGUS(a,b) ((long long)(((b).tv_sec - (a).tv_sec) * 1000000LL + ((b).tv_usec - (a).tv_usec))) - _ejs_log ("EJS_GC_PROFILE: full-gc phases: roots+modules=%lldus stacks=%lldus remset-roots=%lldus (remset=%d) worklist=%lldus census=%lldus\n", - FGUS(fg[0],fg[1]), FGUS(fg[1],fg[2]), FGUS(fg[2],fg[3]), - _ejs_heap.remset_count, FGUS(fg[3],fg[4]), FGUS(fg[4],fg[5])); -#undef FGUS - } - } - -#if gc_timings > 1 - gettimeofday (&tvafter, NULL); -#endif - -#if gc_timings > 1 - { - uint64_t usec_before = tvbefore.tv_sec * 1000000 + tvbefore.tv_usec; - uint64_t usec_after = tvafter.tv_sec * 1000000 + tvafter.tv_usec; - - _ejs_log ("gc scan took %gms\n", (usec_after - usec_before) / 1000.0); - } -#endif - -#if gc_timings > 1 - gettimeofday (&tvbefore, NULL); -#endif - - sweep_heap(); - - // mostly-copying: evacuate the sparse pages' unpinned live - // cells, rewrite every reference, return emptied pages to their - // arenas. (Skipped on the shutdown collection — nothing left to - // move for.) - if (compact_enabled && !shutting_down) - compact_old_gen(); - - // the remembered state may dangle into cells this sweep just - // freed — rebuild it from the live old gen - if (!shutting_down) - remset_rebuild_after_full_gc(); - - if (gc_profile && !shutting_down) { - gettimeofday (&prof_tv_end, NULL); - uint64_t usec = (prof_tv_end.tv_sec - prof_tv_begin.tv_sec) * 1000000ULL - + (prof_tv_end.tv_usec - prof_tv_begin.tv_usec); - profile_report_cycle_end (usec); - } - -#if gc_timings > 1 - { - gettimeofday (&tvafter, NULL); - } -#endif - -#if gc_timings > 1 - { - uint64_t usec_before = tvbefore.tv_sec * 1000000 + tvbefore.tv_usec; - uint64_t usec_after = tvafter.tv_sec * 1000000 + tvafter.tv_usec; - - _ejs_log ("gc sweep took %gms\n", (usec_after - usec_before) / 1000.0); - } -#endif - -#if gc_timings > 1 - _ejs_log ("_ejs_gc_collect stats:\n"); - _ejs_log (" num_roots: %d\n", num_roots); - _ejs_log (" total objects: %d\n", total_objs); - _ejs_log (" num large objects: %d\n", large_objs); - _ejs_log (" garbage objects: %d\n", white_objs); -#endif - - // age the survivors: this epoch's black is next epoch's white - mark_epoch_advance(); - - if (shutting_down) { - // NULL out all of our roots - - for (int i = 0; i < root_registry_count; i++) - *root_registry[i] = _ejs_null; - free (root_registry); - root_registry = NULL; - root_registry_count = root_registry_capacity = 0; - - SPEW(1, _ejs_log ("final gc page statistics:\n"); - for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { - int len = 0; - - EJS_LIST_FOREACH (&heap_pages[hp], PageInfo, page, { - len ++; - }); - - _ejs_log (" size: %d pages: %d\n", 1<<(hp + 3), len); - }); - } -#if sanity - else { - for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { - EJS_LIST_FOREACH (&heap_pages[hp], PageInfo, page, { - for (int c = 0; c < CELLS_IN_PAGE (page); c ++) { - if (!cell_is_free(page->page_bitmap[c]) && !cell_is_white(page->page_bitmap[c])) - continue; - } - }) - } - } -#endif - SPEW(1, _ejs_log ("collection finished\n")); -} - -static size_t -calc_heap_size() -{ - size_t size = 0; - for (int hp = 0; hp < HEAP_PAGELISTS_COUNT; hp++) { - size += _ejs_list_length(&heap_pages[hp]) * PAGE_SIZE; - } - return size; -} - -// heap footprint measured after the last collection's sweep. The -// collection trigger scales with this: a fixed allocation budget on a -// growing live set makes total GC work quadratic in heap size (shapes -// shapes moved per-object property storage into the GC heap, which pushed -// stage2's self-compile off that cliff — hours of back-to-back full -// marks of a ~900MB heap). Letting the heap grow ~gc_growth_pct% -// between full collections keeps total mark work linear (see -// full_gc_trigger; compaction shrinks this after a drop in live set, -// so the cadence adapts back down too). -static size_t heap_size_at_last_gc = 0; - -void -_ejs_gc_collect(const char *reason) -{ - SPEW(1, _ejs_log ("_ejs_gc_collect(%s)\n", reason)); - prof_gc_reason = reason; -#if gc_timings > 0 - struct timeval tvbefore, tvafter; - - gettimeofday (&tvbefore, NULL); - - int heap_size = calc_heap_size(); -#endif - - _ejs_gc_collect_inner(EJS_FALSE); - - // post-sweep footprint drives the proportional collection trigger - // (see heap_size_at_last_gc) - heap_size_at_last_gc = calc_heap_size(); - -#if gc_timings > 0 - gettimeofday (&tvafter, NULL); - - uint64_t usec_before = tvbefore.tv_sec * 1000000 + tvbefore.tv_usec; - uint64_t usec_after = tvafter.tv_sec * 1000000 + tvafter.tv_usec; - - _ejs_log ("gc collect took %gms\n", (usec_after - usec_before) / 1000.0); - _ejs_log (" for a heap size of %zdMB\n", heap_size/(1024*1024)); -#if gc_timings > 1 - _ejs_gc_dump_heap_stats(); -#endif -#endif -} - -int total_allocs = 0; - -void -_ejs_gc_shutdown() -{ - _ejs_gc_collect_inner(EJS_TRUE); - SPEW(1, _ejs_log ("total allocs = %d\n", total_allocs)); - - if (gc_profile) - profile_report_shutdown(); - - _ejs_log ("gc allocation stats (_ejs_gc_shutdown):\n"); - _ejs_log (" objects: %d\n", num_object_allocs); - _ejs_log (" closureenv: %d\n", num_closureenv_allocs); - _ejs_log (" primstr: %d\n", num_primstr_allocs); - _ejs_log (" primsym: %d\n", num_primsym_allocs); -} - -/* Compute the smallest power of 2 that is >= x. */ -static inline size_t -pow2_ceil(size_t x) -{ - - x--; - x |= x >> 1; - x |= x >> 2; - x |= x >> 4; - x |= x >> 8; - x |= x >> 16; -#if (SIZEOF_PTR == 8) - x |= x >> 32; -#endif - x++; - return (x); -} - -static GCObjectPtr -alloc_from_page(PageInfo *info) -{ - LOCK_PAGE(info); - - EJS_ASSERT (info->num_free_cells > 0); - - GCObjectPtr rv = NULL; - uint32_t cell; - - SPEW(2, _ejs_log ("allocating object from page %p (cell size %zd)\n", info, info->cell_size)); - - if (info->bump_ptr) { - rv = (GCObjectPtr)EJS_ALIGN(info->bump_ptr, 8); - cell = PTR_TO_CELL(info->bump_ptr, info); - info->bump_ptr += info->cell_size; - // check if we can service the next alloc request from the bump_ptr. if we can't, switch - // to the freelist code below. - if (info->bump_ptr + info->cell_size >= info->page_end) - info->bump_ptr = NULL; - } - else { - for (cell = 0; cell < info->num_cells; cell ++) { - if (cell_is_free(info->page_bitmap[cell])) { - rv = info->page_start + (cell * info->cell_size); - break; - } - } - } - - EJS_ASSERT (rv); - - cell_set_allocated(&info->page_bitmap[cell]); - cell_set_white(&info->page_bitmap[cell]); - - info->num_free_cells --; - - UNLOCK_PAGE(info); - - SPEW(2, _ejs_log ("allocated obj %p from page %p (cell size %zd), free cells remaining %zd\n", rv, info, info->cell_size, info->num_free_cells)); - -#if !clear_on_finalize - memset(rv, 0, info->cell_size); -#endif - return rv; -} - -static GCObjectPtr -alloc_from_los(size_t size, EJSScanType scan_type) -{ - // allocate enough space for the object, our header, and our bitmap. leave room enough to align the return value - LargeObjectInfo *rv = alloc_from_os(size + sizeof(LargeObjectInfo) + 16); - if (rv == NULL) - return NULL; - - rv->page_info.page_bitmap = (char*)((void*)rv + sizeof(LargeObjectInfo)); // our bitmap comes right after the header - rv->page_info.page_start = (void*)EJS_ALIGN((void*)rv + sizeof(LargeObjectInfo) + 8, 8); - rv->page_info.cell_size = size; - rv->page_info.num_cells = 1; - rv->page_info.num_free_cells = 0; - rv->page_info.los_info = rv; - - cell_set_white(&rv->page_info.page_bitmap[0]); - cell_set_allocated(&rv->page_info.page_bitmap[0]); - - *((GCObjectHeader*)rv->page_info.page_start) = scan_type | EJS_GC_HEADER_YOUNG; - - rv->alloc_size = size; - - conservative_bounds_add (rv, size + sizeof(LargeObjectInfo) + 16); - los_ranges_add (rv); - EJS_LIST_PREPEND (rv, los_list); - //_ejs_log ("alloc_from_los returning %p\n, los_list = %p\n", rv->page_info.page_start, los_list); - return rv->page_info.page_start; -} - -static void -release_to_los (LargeObjectInfo *lobj) -{ - los_ranges_remove (lobj); - // the mapping covers the header + bitmap slop too, not just the - // payload (releasing only alloc_size leaked the tail page) - release_to_os (lobj, lobj->alloc_size + sizeof(LargeObjectInfo) + 16); -} - -size_t alloc_size = 0; -int num_allocs = 0; -size_t alloc_size_at_last_gc = 0; - -GCObjectPtr -_ejs_gc_alloc(size_t size, EJSScanType scan_type) -{ - GCObjectPtr rv = NULL; - - num_allocs ++; - total_allocs ++; - - switch (scan_type) { - case EJS_SCAN_TYPE_PRIMSTR: num_primstr_allocs ++; break; - case EJS_SCAN_TYPE_PRIMSYM: num_primsym_allocs ++; break; - case EJS_SCAN_TYPE_OBJECT: num_object_allocs ++; break; - case EJS_SCAN_TYPE_CLOSUREENV: num_closureenv_allocs ++; break; - } - - int bucket; - int bucket_size = MAX(pow2_ceil(size), 1<next; - } - return count; -} - -void -_ejs_gc_dump_heap_stats() -{ - _ejs_log ("arenas:\n"); - for (int i = 0; i < num_arenas; i ++) { - _ejs_log (" [%d] - %p - %p\n", i, heap_arenas[i], heap_arenas[i]->end); - } - - for (int i = 0; i < HEAP_PAGELISTS_COUNT; i ++) { -#if gc_timings > 3 - EJSBool printed_something = EJS_FALSE; -#endif - _ejs_log ("heap_pages[%d, size %d] : %d pages\n", i, 1 << (i + OBJECT_SIZE_LOW_LIMIT_BITS), _ejs_list_length (&heap_pages[i])); -#if gc_timings > 3 - EJS_LIST_FOREACH (&heap_pages[i], PageInfo, page, { - GCObjectPtr p = page->page_start; - for (int c = 0; c < CELLS_IN_PAGE (page); c ++, p += page->cell_size) { - if (cell_is_free(page->page_bitmap[c])) - continue; - GCObjectHeader* headerp = (GCObjectHeader*)p; - if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) _ejs_log ("O"); - else if ((*headerp & EJS_SCAN_TYPE_CLOSUREENV) != 0) _ejs_log ("C"); - else if ((*headerp & EJS_SCAN_TYPE_PRIMSTR) != 0) _ejs_log (((*headerp >> EJS_GC_USER_FLAGS_SHIFT) & 0x10) != 0 ? "s" : "S"); - else if ((*headerp & EJS_SCAN_TYPE_PRIMSYM) != 0) _ejs_log ("X"); - printed_something = EJS_TRUE; - } - }) - if (printed_something) - _ejs_log ("\n"); -#endif - } - - _ejs_log ("\n"); - -#if spew >= 2 - if (los_list) { - _ejs_log ("large object store: "); - for (LargeObjectInfo* lobj = los_list; lobj; lobj = lobj->next) { - GCObjectHeader* headerp = (GCObjectHeader*)lobj->page_info.page_start; - if ((*headerp & EJS_SCAN_TYPE_OBJECT) != 0) _ejs_log ("O"); - else if ((*headerp & EJS_SCAN_TYPE_CLOSUREENV) != 0) _ejs_log ("C"); - else if ((*headerp & EJS_SCAN_TYPE_PRIMSTR) != 0) _ejs_log ("S"); - else if ((*headerp & EJS_SCAN_TYPE_PRIMSYM) != 0) _ejs_log ("X"); - } - _ejs_log ("\n"); - } -#endif -} - ///////// ejsval _ejs_GC; diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 296d906c..2f14b691 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -601,6 +601,33 @@ shaped_slots_are_embedded (EJSObject* obj) return (char*)shaped_env(obj) == (char*)obj + sizeof(EJSObject); } +// retiring a slot-storage env: an OLD out-of-line env we are about to +// disconnect is old-gen garbage until the next full sweep, but the +// old-gen WALKERS — the minor's remset-overflow fallback and the +// EJS_GC_VERIFY/EJS_GC_PARANOID checkers — cannot tell garbage from +// live and will still visit its slots. Queue the retiree for one +// precise scan: the next minor rewrites its young refs (live right +// now, via the surviving copies) to their promoted addresses, after +// which the cell is inert until swept. (Found by the P6.3 stress +// lanes: the promoted env of a young rooted object, orphaned by +// capacity growth during _ejs_init, kept pre-promotion slot values +// that only ACCIDENTAL conservative pins of stale stack copies had +// been rescuing — the file split's codegen shift removed the luck.) +static void +shaped_retire_slots (EJSObject* obj) +{ + if (_ejs_heap.nursery_base == NULL) // nursery off: no remset + return; + if (EJSVAL_IS_NULL(obj->slots) || shaped_slots_are_embedded (obj)) + return; // embedded storage dies inside the object's own cell + EJSClosureEnv* env = shaped_env (obj); + if (_ejs_gc_is_young (env)) // young garbage is swept precisely + return; + if (*(GCObjectHeaderWord*)env & EJS_GC_HEADER_DIRTY) + return; // already queued + _ejs_gc_remember_slow (env); +} + // grow slot storage to hold at least `needed` values. May allocate from // the GC heap: obj->slots stays attached (and scanned) until the copy is // done, so a collection triggered by the new array is safe. Growth is @@ -620,9 +647,11 @@ shaped_ensure_capacity (EJSObject* obj, uint32_t needed) if (newcap > EJS_SHAPE_FIELD_CAP_MAX) newcap = EJS_SHAPE_FIELD_CAP_MAX; ejsval newslots = _ejs_closureenv_new (newcap); - if (cap) + if (cap) { memcpy (EJSVAL_TO_CLOSUREENV_IMPL(newslots)->slots, shaped_slots(obj), cap * sizeof(ejsval)); + shaped_retire_slots (obj); + } obj->slots = newslots; _ejs_gc_remember(obj, newslots); } @@ -653,6 +682,9 @@ _ejs_object_to_dictionary (EJSObject* obj, EJSShapeMigrateReason reason) _ejs_property_desc_set_configurable (desc, EJS_TRUE); _ejs_propertymap_insert (map, names[i], desc); } + // the union flip below disconnects the slot array — same + // retirement contract as shaped_ensure_capacity + shaped_retire_slots (obj); obj->map = map; _ejs_shape_object_migrate (obj, reason); } From e86b4f014623c44b4834e391fbeacae4647d7e30 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Tue, 28 Jul 2026 23:38:22 -0700 Subject: [PATCH 129/146] docs: runtime-P4 (P6.3) phase record; P6 closed; compiler-P1.1 pinned docs/runtime-p4-results.md records the phase: the cell-lifecycle block + explicit epochs, the root registry + single policy function, the six-file split, the two flushed stack-luck hazards, and the gate results. plans.md marks P6.3 (and with it the P6 milestone) done; runtime-plan.md closes runtime-P4; compiler-plan.md pins the pre-existing test-eir debt found at phase entry as compiler-P1.1. Co-Authored-By: Claude Fable 5 --- docs/compiler-plan.md | 16 +++++ docs/plans.md | 5 +- docs/runtime-p4-results.md | 128 +++++++++++++++++++++++++++++++++++++ docs/runtime-plan.md | 9 ++- 4 files changed, 154 insertions(+), 4 deletions(-) create mode 100644 docs/runtime-p4-results.md diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md index f1ae349b..e264723e 100644 --- a/docs/compiler-plan.md +++ b/docs/compiler-plan.md @@ -96,6 +96,22 @@ shaped-world continuation), shape-guard regions (see shapes-plan). 0` tag-compare quirk to work under self-host); generator suspension makes "stable" slots unstable mid-activation — suspendable functions decline the CSE exemptions. +- [ ] **compiler-P1.1 — test-eir debt from flag-off born-shaped + literals.** Found RED at runtime-P4 (P6.3) entry, 2026-07-29: + 11 lib/eir/tests.ts failures, pre-existing (reproduce from + sources untouched by that phase). Three classes: (a) stale + expectations still asserting `make_object keys=[...]` where + flag-off lowering now mints `make_object_shaped` (gc-P5 + part 2), including the "flag-off keeps make_object exactly" + test that asserts the OLD contract; (b) the sinking / + sink-flow fold tests fail knob-independently — the + flow-sensitive sinking does not drain `make_object_shaped` + allocations (real optimizer gap, not just test rot); (c) + `assertNotContains("make_object")` substring-matches + `make_object_shaped`, so those assertions can't distinguish + the two ops. Fix the sinking gap (or decide it's deferred and + assert the shaped alloc form), then repair the expectations + with substring-safe matchers. - [ ] **compiler-P2 — TypeScript port of the compiler.** The compiler converts from JS to TypeScript (largely done for lib/eir/ and lib/*.ts — the strict-TS conversion landed with the EIR work); diff --git a/docs/plans.md b/docs/plans.md index a5c10d04..e4dc50e8 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -98,9 +98,10 @@ gc-plan.md, shapes-plan.md (Step B). slots, object-literal inline allocation, typed-slot barrier elision (gc-P5; consumes shapes-plan's deferred Step B). DONE 2026-07-28 — docs/gc-p5-results.md. -- [ ] **P6.3** collector structural refactor: cell-lifecycle module, +- [x] **P6.3** collector structural refactor: cell-lifecycle module, LOS lookup, file split (runtime-P4; can land any time after - P6.1, behavior-preserving). + P6.1, behavior-preserving). DONE 2026-07-29 — + docs/runtime-p4-results.md. ## P7 — Robustness diff --git a/docs/runtime-p4-results.md b/docs/runtime-p4-results.md new file mode 100644 index 00000000..e8dcd18e --- /dev/null +++ b/docs/runtime-p4-results.md @@ -0,0 +1,128 @@ +# runtime-P4 results — collector structural refactor (plans P6.3) + +Phase record for runtime-plan.md's runtime-P4: the cell-lifecycle +consolidation, explicit mark epochs, the root registry, the single +collection-policy function, and the ejs-gc.c file split. Landed +2026-07-29 on `eir`. Behavior-preserving by design; the differential +lanes gate. + +## What landed + +Three commits, each independently green: + +1. **Cell lifecycle in one block; explicit mark epochs.** The + scattered `SET_*`/`IS_*` color macros and the mutable + white/black mask pair became one section of inline functions + (`cell_is_free/gray/white/black`, `cell_set_*`) with the bitmap + encoding private to it. White/black are now EPOCH-RELATIVE: the + color bits hold GRAY or the parity of the mark epoch the cell was + last colored in, and `mark_epoch_advance()` — one call site, the + end of a full collection — ages every surviving black cell white in + O(1). The mask swap was the same aging as two coupled globals + mutated in place; the epoch is that flip made explicit and + single-owner. The dead `CONCURRENT` CAS macro variants went with + it. + +2. **Root registry; one collection-policy function.** The root set + is a growable array (O(1) add, swap-with-last remove) with ONE + iteration helper — full-GC mark, minor evacuation, compaction + fixup, the debug walks, and the shutdown NULL-out all go through + `root_registry_foreach`/`root_registry_shutdown` instead of five + hand-rolled walks of a malloc'd linked list. Every collection the + runtime initiates for itself is decided in `gc_policy(event)`: + the growth trigger on the old-allocation path, the post-minor + promotion check, the EVERY_N_ALLOC stress cadences (minor in + nursery mode, full in old mode), and the forced allocation-failure + collections. Each event preserves its historical baseline/counter + resets exactly, so collection schedules are unchanged. + +3. **File split.** ejs-gc.c (~3.7k lines) became six files plus the + internal contract header `ejs-gc-internal.h` (module map lives + there): + + | file | contents | + |---|---| + | ejs-gc.c | lifecycle API, allocator entry, cell free path, root registry, collection policy, GC JS object | + | ejs-gc-heap.c | arena reservation, arenas/pages, LOS + sorted-range lookup, find_page_and_cell | + | ejs-gc-mark.c | worklist, precise + conservative scanners, gc-frame skip, generator stack bookkeeping | + | ejs-gc-minor.c | the nursery and the mostly-copying minor | + | ejs-gc-major.c | full collections: mark/sweep orchestration, major compaction, the epoch advance | + | ejs-gc-debug.c | EJS_GC_PROFILE / WATCH / VERIFY / PARANOID | + + The split was verified mechanically: every function body extracted + from the old file and diffed against the new tree — 98/98 identical + modulo `static` (the two exceptions: `_ejs_gc_collect_inner` + gained the `root_registry_shutdown()` call; dead-code + `page_list_count` was dropped). The duplicate tentative + definition of `heap_size_at_last_gc` collapsed to one. + +## The two bugs the split surfaced (both pre-existing) + +The TU split shifts codegen — frame layouts, spill slots — and the +stress lanes promptly caught two hazards that ACCIDENTAL conservative +pins of stale stack copies had been masking. Both fixed; both are +the same lesson as gc-P4's bistable pin-scan: anything that depends +on C-stack luck is a latent bug. + +- **Orphaned old slot storage** (ejs-object.c). When + `shaped_ensure_capacity` grows a shaped object's out-of-line slot + array (or `_ejs_object_to_dictionary` drops it), an OLD-gen env + cell is disconnected while still holding its pre-copy slot values. + It is garbage until the next full sweep — but the old-gen WALKERS + (the minor's remset-overflow fallback, EJS_GC_VERIFY, + EJS_GC_PARANOID) cannot tell garbage from live and visit those + stale slots after the young referents move or die; the overflow + fallback could even "evacuate" a poisoned cell. Observed + concretely: the promoted env of the still-young rooted Reflect + object, orphaned by capacity growth during `_ejs_init`, whose slot + 7 aborted EJS_GC_VERIFY once the split removed the rescuing pin. + Fix: `shaped_retire_slots` queues the retiree for one precise scan + (remset entry) at retirement — the next minor rewrites its young + refs while they are still live, after which the cell is inert until + swept. + +- **Paranoid checker self-scan** (ejs-gc-debug.c). The + dying-young-referrer report's raw C-stack sweep scanned from its + own frame to stack bottom, which includes the COLLECTOR's frames — + written after the conservative pin scan ran. The sweep loop's own + cell cursor spilled into the probed range and reported the dying + cell as "still referenced." Fix: the sweep floors at the minor's + entry frame (`paranoid_stack_floor`, set in + `_ejs_gc_minor_collect`), so only frames the conservative scan + could have seen at pin time are probed. + +## Notes + +- The runtime-plan entry also listed "aligned LOS regions with + O(log n) lookup." The lookup half landed in gc-P4 (the sorted + range array + the arena direct map); with the 256-byte size class + (gc-P5) routing every cap-14 shape and >14-slot env to pages, the + LOS population is small and cold, so the alignment half is dropped + as moot. Raising the shaped field cap past 14 is shapes-plan + business (a behavior change), not this refactor's. +- The gc-P5 note about `old_alloc_cell_for_promotion` walking the + free-page list (61 profile samples) stands as a recorded perf item; + it was left alone here to keep the phase strictly + behavior-preserving. + +## Gates + +- Matrix: test-eir-lowtier + stage0–3 (including the stage2/stage3 + byte-identity fixed point) + stage1-shapes-off green. +- **test-eir was found RED at phase entry** — 11 failing EIR unit + tests, all pre-existing compiler-side test debt from gc-P5 part 2's + flag-off born-shaped literals: stale `make_object keys=[...]` + expectations, a stale "flag-off keeps make_object" test, and the + sinking/sink-flow fold tests, which fail knob-independently (the + flow-sensitive sinking does not drain `make_object_shaped`, and + `assertNotContains("make_object")` substring-matches the shaped op + besides). Proven pre-existing: this phase touches no lib/ file + (`git diff` empty against the base commit for lib/), and the + failures reproduce from the base commit's sources alone. Recorded + in compiler-plan territory as follow-up; NOT masked by editing the + tests here. +- The gc stress lane (the gc tests × EVERY_N_ALLOC 7/31/101 × + PARANOID / VERIFY / NURSERY=off / COMPACT=off) matches the + phase-entry baseline failure set exactly — the pre-existing pinned + generator-stress bugs (runtime-P1's burn-down list) and nothing + else. Verified identical at every intermediate commit. diff --git a/docs/runtime-plan.md b/docs/runtime-plan.md index 21398f57..2db90252 100644 --- a/docs/runtime-plan.md +++ b/docs/runtime-plan.md @@ -42,7 +42,7 @@ performance bucket owns. console.log inspect-format drift (22.4 → 22.23 changed array formatting); CI pins node 22.4.0. The durable fix asserts on values rather than inspect output. -- [ ] **runtime-P4 — Collector structural refactor.** Recorded during +- [x] **runtime-P4 — Collector structural refactor.** Recorded during the gc-P2 debugging sessions, deliberately deferred while phases were landing: extract a cell-lifecycle module (alloc/free/color in one place), kill the mark-color mask flip in favor of explicit @@ -50,4 +50,9 @@ performance bucket owns. raising the shaped-object field cap past 14), a real root registry API, one collection-policy function, and a file split (ejs-gc.c is ~3k lines). Behavior-preserving; gated on the - differential lanes. + differential lanes. DONE 2026-07-29 — + docs/runtime-p4-results.md (the LOS lookup had already landed + with gc-P4; the cap raise is shapes-plan business). Flushed two + pre-existing stack-luck hazards: orphaned old slot-storage envs + (retirement now queues one precise scan) and the paranoid + checker's self-scan of collector frames. From 60bc67717d4bdc9d3a2a1b6313f94bb3d1a5a27f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 29 Jul 2026 03:47:37 -0700 Subject: [PATCH 130/146] =?UTF-8?q?eir:=20runtime-P1=20(P7.1)=20=E2=80=94?= =?UTF-8?q?=20the=20pinned-bug=20burn-down;=20all=20ten=20fixed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit typeof null is "object" (runtime + fold + typeof_is helpers, which also stop admitting functions as "object"); -0 === 0 (numbers compare before the NaN-box tag in strict/loose eq, SameValue — Object.is(0,0) was false — and SameValueZero); Math.round ties toward +inf; ToNumber's string path is a real StringToNumber (ES whitespace trim, "Infinity" only, 0x/0b/0o); the shift family and ToUint32 lose their UB double->unsigned casts; ToNumber(null)=0 and add tests the ToPrimitive results for stringness; mult/div/mod coerce both sides; uncaught generator-body throws propagate to the caller (invoke_closure_catch at the body boundary, resume sites rethrow on the caller's stack); sparse arrays get real element storage (aligned 512-slot arraylets); getOwnPropertyNames includes non-enumerables, ToObject-coerces, and reports index properties + length. The stress sweep flushed a latent hazard the generator fix made reachable: C-side catchers (_ejs_invoke_closure_catch/_func_catch) left the gc-frame chain head pointing at unwound emitted frames; C wrappers now restore the saved head on catch, closing the same hole for promises/Map/Array.from/iterator helpers. console.log now prints -0 and quotes strings nested in arrays (node inspect parity). Un-pinned: typeof1, math2, sparsearray1, proxy6. Matrix green (424/20/0 per stage lane); stress lanes at the phase-entry baseline; test-eir at exactly the 11 compiler-P1.1 items. docs/runtime-p1-results.md is the record; runtime-plan/plans ticked. Co-Authored-By: Claude Fable 5 --- docs/plans.md | 3 +- docs/runtime-p1-results.md | 150 +++++++++++ docs/runtime-plan.md | 47 ++-- lib/eir/cleanup.ts | 29 +-- runtime/ejs-array.c | 163 ++++++++++-- runtime/ejs-array.h | 4 + runtime/ejs-console.c | 11 +- runtime/ejs-function.c | 29 +++ runtime/ejs-generator.c | 36 ++- runtime/ejs-generator.h | 6 + runtime/ejs-invoke-closure-catch.ll | 4 +- runtime/ejs-math.c | 11 +- runtime/ejs-object.c | 36 ++- runtime/ejs-ops.c | 350 ++++++++++++-------------- test/expected/proxy6.js.expected-out | 6 +- test/expected/typeof1.js.expected-out | 2 +- test/math2.js | 2 - test/proxy6.js | 1 - test/sparsearray1.js | 1 - test/typeof1.js | 4 - 20 files changed, 609 insertions(+), 286 deletions(-) create mode 100644 docs/runtime-p1-results.md diff --git a/docs/plans.md b/docs/plans.md index e4dc50e8..df8b354c 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -108,7 +108,8 @@ gc-plan.md, shapes-plan.md (Step B). The correctness and ergonomics debts, paid down. Detail: runtime-plan.md, compiler-plan.md. -- [ ] **P7.1** pinned runtime-bug burn-down (runtime-P1). +- [x] **P7.1** pinned runtime-bug burn-down (runtime-P1). DONE + 2026-07-29 — docs/runtime-p1-results.md. - [ ] **P7.2** export-boundary wrapper: specialization across escaping entry points (runtime-P2). - [ ] **P7.3** value-based test harness, un-pinning node's inspect diff --git a/docs/runtime-p1-results.md b/docs/runtime-p1-results.md new file mode 100644 index 00000000..3735a1ed --- /dev/null +++ b/docs/runtime-p1-results.md @@ -0,0 +1,150 @@ +# runtime-P1 results — pinned-bug burn-down (plans P7.1) + +Phase record for runtime-plan.md's runtime-P1: the ten pinned runtime +bugs, fixed. Landed 2026-07-29 on `eir`. Every fix was verified +against node 22.4.0 on a direct repro before the suite gates ran. + +## The ten, and what each turned out to be + +1. **`typeof null` → `"object"`.** Three coupled sites: the runtime + mapping (`_ejs_op_typeof`), the compiler's constant fold + (cleanup.ts `TYPEOF_OF_TAG`), and the `typeof x === "T"` peephole's + runtime helpers. `_ejs_op_typeof_is_object` now admits null — and + excludes functions, which it had wrongly admitted (`typeof + function(){} === "object"` was `true`; the helper never matched + `_ejs_op_typeof`'s function-first ordering). `typeof_is_null` is + constant false. typeof1.js un-pinned (`generator: none` dropped — + node now agrees). + +2. **`-0 === 0`.** The strict_eq NaN-box TAG compare ran before the + numeric compare, and ±0 are different bit patterns. Numbers now + compare first, by IEEE `==` (NaN and ±0 exact per spec). The same + tag-first flaw was latent in `_ejs_op_eq` (step 3's "same Type"), + `SameValue` (whose step 6c had a typo making `Object.is(0,0)` + FALSE), and `SameValueZero` (whose guard let a string/object pair + fall into the string compare) — all four fixed. cleanup.ts's + equality-fold decline over `-0` consts (compiler-P1's workaround + for the runtime quirk) is deleted; math2.js un-xfailed. + +3. **`Math.round(-2.5)` → `-2`.** C `round()` ties away from zero; + ES ties toward +∞. Now `floor(x + 0.5)` with the two exactness + screens (|x| ≥ 2^52 already integral; |x| < 0.5 returns ±0 — the + `0.49999999999999994` case where `x + 0.5` rounds to 1.0). + +4. **`Number(" 7 ")` → `7`.** ToNumber's string path is a real + StringToNumber now: trims the ES WhiteSpace ∪ LineTerminator set + (on the UCS-2 code units), empty → 0, exactly-"Infinity" (strtod's + "inf"/"nan" spellings rejected), 0x hex (digits only, no sign, no + hex-float exponent), ES6 0b/0o, NaN on any non-ASCII unit. + +5. **`-8 >>> 28` → `15`.** The shift family cast the double operand + straight to unsigned (UB; arm64 saturates negatives to 0). All + four shifts now go through ToInt32/ToUint32 — which also un-aborts + their string/object operand paths. `ToUint32` itself did the same + UB cast and is now `(uint32_t)ToInt32`; bitand/bitor/bitnot moved + from int64-truncating ToInteger to ToInt32. + +6. **`1 + null` aborted.** ToNumber had no null case (→ 0 now). Add + also tested the *original* operands for stringness rather than the + ToPrimitive results, so `({}) + 1` numeric-added to NaN instead of + concatenating — the ES string test is on lprim/rprim; fixed. + +7. **`"a" * "b"` aborted.** mult/div/mod were number-lhs-only with + NOT_IMPLEMENTED arms; each is now just ToNumber both sides (with + explicit evaluation order — sub too, whose C argument order was + unsequenced). + +8. **Uncaught throw out of a generator body.** The desugar's outer + catch rethrows on the generator's makecontext stack, and the + unwinder walked off it into terminate. `_ejs_generator_start` now + invokes the body through `_ejs_invoke_closure_catch` (the runtime's + existing landing-pad wrapper): the exception parks in the + generator (`threw_out`), the context swaps back normally, and + every resume site rethrows via `_ejs_generator_resume_result` — on + the CALLER's stack. `.next()` after the throw keeps answering + `{ undefined, true }` per 25.3.3.3. The four generator xfails + (5/6/15/16) are a different debt (yield-expression sent values) + and stay pinned. + +9. **Sparse-array set NOT_IMPLEMENTED.** The Arraylet type existed + but nothing read or wrote one. Implemented: fixed 512-slot + chunk-aligned arraylets, sorted by start_idx (binary search; + aligned chunks can't overlap), created on demand full of the same + hole magic dense arrays use. Get / GetOwnProperty / HasProperty / + Set / Delete / DefineOwnProperty and length-shrink truncation all + handle the sparse case; storage iteration (not length iteration) + keeps `new Array(1e9)` O(present-elements). sparsearray1.js + un-xfailed. + +10. **getOwnPropertyNames.** Three defects: it filtered out + non-enumerables (the pinned divergence — the filter belongs to + Object.keys, not here), it threw-NOT_IMPLEMENTED on primitives + (ES6 ToObject-coerces; null/undefined still TypeError), and it + only walked the property map, so array / String-object index + properties and `length` never appeared. Index names now come + first (OrdinaryOwnPropertyKeys order) via + `_ejs_array_push_own_index_names` (arraylet-aware) or the + String's primStr length, then `length`, then the map walk. + +## Adjacent fixes the burn-down surfaced + +- **C-side exception catchers leaked the gc-frame chain** + (ejs-function.c / ejs-invoke-closure-catch.ll). Emitted CATCH + handlers re-link their own frame record as the chain head after an + unwind; `_ejs_invoke_closure_catch` / `_ejs_invoke_func_catch` — C + catchers with no frame record — left `_ejs_heap.gc_frame_head` + pointing at the unwound (dead) emitted frames. The generator fix + made this reachable deterministically: the body's exception is + caught on the generator stack, `pop_generator` parked the stale + head, and the next minor walked dead frame records (segfault under + EJS_GC_EVERY_N_ALLOC=7, no VERIFY needed; found by the stress sweep + over the new repros). Fix: the .ll wrappers became `*_inner` and C + wrappers restore the saved chain head on the catch path — which + also closes the same latent hazard at every existing C catcher + (promise reactions, Map/Array.from ingestion, the iterator + helpers). Same lesson as runtime-P4's two finds: anything that + depends on C-stack luck is a latent bug. +- **console.log formatting** (differential-lane fidelity, both + pre-existing): `-0` prints as `-0` (node's inspect distinguishes + it; ToString still collapses to "0" per spec), and strings nested + in arrays print quoted (`[ 'a' ]`). proxy6.js — pinned with + `generator: none` precisely because of the unquoted format — is + node-generated again. + +## Pre-existing issues observed, NOT fixed here + +- The PARANOID stress lane's generator failures (gc-gen*/generator* + × EJS_GC_PARANOID) reproduce bit-for-bit on the phase-entry + runtime — the recorded baseline set, unchanged. +- Under lldb's address layout, EJS_GC_EVERY_N_ALLOC=7 crashes during + `_ejs_init` (xhr init setprop reads a 0xa7-poisoned cell) on the + phase-entry runtime too — an environment-sensitive + conservative-scan-luck use-after-free during init, recorded for a + future stress pass. + +## Un-pinned tests + +typeof1 (generator:none dropped), math2 (xfail dropped), sparsearray1 +(xfail dropped), proxy6 (generator:none dropped). Still pinned, with +reasons unchanged: generator5/6/15/16 (yield sent values), math1 (ES6 +Math functions), forin2/5, object6/7/9, and the rest of the xfail set +— none of them runtime-P1 items. + +## Gates + +- Matrix: test-eir-lowtier + stage0–3 (including the stage2/stage3 + byte-identity fixed point) + stage1-shapes-off — all green. + Stage suites now 424 pass / 20 xfail / 0 fail (math2 and + sparsearray1 un-xfailed and passing). +- test-eir: exactly the 11 pre-existing compiler-P1.1 failures + (born-shaped test debt recorded at runtime-P4 close), nothing new. +- Stress sweep over every new-path repro (uncaught generator throw, + sparse arrays, getOwnPropertyNames, the full value-op battery): + EVERY_N_ALLOC 7/31/101 × VERIFY/PARANOID + NURSERY=off + + COMPACT=off, all green. The gc/generator test stress lane matches + the phase-entry baseline failure set exactly (PARANOID generator + items only, verified pre-existing by A/B against the phase-entry + libecho). +- Direct repro battery (every bug above, constant and non-constant + operand forms, plus Object.is/edge cases): byte-identical to node + 22.4.0 output. diff --git a/docs/runtime-plan.md b/docs/runtime-plan.md index 2db90252..d6cf6d3f 100644 --- a/docs/runtime-plan.md +++ b/docs/runtime-plan.md @@ -8,28 +8,31 @@ performance bucket owns. ## Phases -- [ ] **runtime-P1 — Pinned-bug burn-down.** Each has a pinning test - or a recorded repro; fix in any order, keeping the differential - lanes green: - - `typeof null` → `"null"` (should be `"object"`). - - `-0 === 0` evaluates false (should be true). - - `Math.round(-2.5)` → `-3` (should be `-2`; ties round toward - +∞). - - `Number(" 7 ")` → `NaN` (whitespace should trim). - - `-8 >>> 28` → `0` (should be `15`; unsigned-shift coercion). - - `1 + null` aborts in the runtime (ejs-ops.c generic add) — - should evaluate to `1`. - - `"a" * "b"` aborts (`_ejs_op_mult`) — should be `NaN`. Repro - note: probes must exercise repr-mismatch via reads until fixed. - - An uncaught throw out of a generator body aborts (the desugar's - outer catch rethrows on the generator stack and the unwinder - walks off the makecontext frame; node prints the error in the - caller). Exceptions/coroutine interaction needs an owner. - - Sparse-array `set` through the exotic path is NOT_IMPLEMENTED - (`new Array(N)` + `arr[i] =` aborts) — tests avoid the pattern - today. - - `getOwnPropertyNames` on non-enumerable-bearing objects - diverges from node (pre-existing, mode-independent). +- [x] **runtime-P1 — Pinned-bug burn-down.** All ten fixed; DONE + 2026-07-29 — docs/runtime-p1-results.md (each entry there + records what the bug actually was): + - `typeof null` → `"object"` (runtime + compiler fold + + typeof_is helpers; typeof_is_object also stopped admitting + functions). + - `-0 === 0` → true (strict_eq compares numbers before the + NaN-box tag; same flaw fixed in loose eq, SameValue — which + returned false for `Object.is(0,0)` — and SameValueZero). + - `Math.round` ties toward +∞. + - `Number(" 7 ")` → 7 (real StringToNumber: ES whitespace + trim, "Infinity" only, 0x/0b/0o, empty → 0). + - `-8 >>> 28` → 15 (shifts + ToUint32 had UB double→unsigned + casts; shifts also coerce non-number operands now). + - `1 + null` → 1 (ToNumber(null) = 0; add's string test moved + to the ToPrimitive results). + - `"a" * "b"` → NaN (mult/div/mod are ToNumber-both-sides). + - Uncaught generator-body throw propagates to the caller + (invoke_closure_catch at the body boundary; resume sites + rethrow on the caller's stack). + - Sparse-array element storage implemented (aligned 512-slot + arraylets); sparsearray1.js un-xfailed. + - `getOwnPropertyNames`: non-enumerables included, primitives + ToObject-coerced, array/String index properties + `length` + reported. - [ ] **runtime-P2 — Export-boundary wrapper.** Escaping entry points currently pin down specialization and unguarded-consumption opportunities (the compiler buckets decline them). A generated diff --git a/lib/eir/cleanup.ts b/lib/eir/cleanup.ts index e94a9553..754a1fea 100644 --- a/lib/eir/cleanup.ts +++ b/lib/eir/cleanup.ts @@ -276,22 +276,6 @@ const EVAL_BINOPS = new Set([ const RELATIONAL = new Set(["lt", "le", "gt", "ge"]); -// equality ops decline -0 operands: the runtime's strict_eq leads with -// a NaN-box TAG compare, so `-0 === 0` is FALSE there (the math2.js -// xfail) while the hosting engine says true — and a self-hosted -// compiler would fold it the runtime's way, so folding it at all would -// also break stage byte-identity. Fail closed; the runtime decides. -const EQUALITY = new Set(["strict_eq", "strict_neq", "loose_eq", "loose_neq"]); - -function isNegZeroConst(c: Inst): boolean { - if (c.imms["kind"] !== "number") return false; - const v = c.imms["value"] as number; - // NOT `v === 0 && 1/v < 0`: under the self-hosted runtime -0 === 0 - // is FALSE (the same quirk this decline exists for), which would - // disable the decline exactly when the compiler runs under ejs - return 1 / v === -Infinity; -} - /* eslint-disable @typescript-eslint/no-explicit-any */ function evalBinop(op: string, x: any, y: any): unknown { switch (op) { @@ -354,15 +338,14 @@ function evalUnop(op: string, x: any): unknown { } /* eslint-enable @typescript-eslint/no-explicit-any */ -// the runtime's typeof string for a lattice tag (ejs's typeof maps null -// to "null", not "object" — _ejs_op_typeof; folds must match the -// runtime, not the spec) +// the runtime's typeof string for a lattice tag (_ejs_op_typeof — +// spec mapping, typeof null is "object") const TYPEOF_OF_TAG: Record = { number: "number", string: "string", boolean: "boolean", undefined: "undefined", - null: "null", + null: "object", object: "object", function: "function", }; @@ -390,7 +373,6 @@ function foldConstants(fn: Func, tags: Lattice, stats: OptStats): boolean { (a.imms["kind"] !== "number" || b.imms["kind"] !== "number") ) return; - if (EQUALITY.has(op) && (isNegZeroConst(a) || isNegZeroConst(b))) return; const r = evalBinop(op, constPayload(a), constPayload(b)); if (typeof r === "number" || typeof r === "boolean") { toConst(inst, r, stats); @@ -424,8 +406,9 @@ function foldConstants(fn: Func, tags: Lattice, stats: OptStats): boolean { // `typeof x === "T"` (either operand order) is a single runtime tag // test. The rewrite is exact per _ejs_op_typeof's mapping (the // runtime's typeof_is_ tests the same predicate typeof compares -// against, null quirk included); the typeof goes dead and DCE sweeps -// it. Only the types with runtime.ts entries qualify. +// against — typeof_is_object admits null, typeof_is_null is constant +// false); the typeof goes dead and DCE sweeps it. Only the types with +// runtime.ts entries qualify. const TYPEOF_IS_TYPES = new Set([ "object", "function", diff --git a/runtime/ejs-array.c b/runtime/ejs-array.c index 00d8331d..17fca811 100644 --- a/runtime/ejs-array.c +++ b/runtime/ejs-array.c @@ -2717,6 +2717,105 @@ _ejs_array_init(ejsval global) #undef PROTO_ITER_METHOD } +// --- sparse (arraylet) element storage -------------------------------------- +// +// a sparse array's elements live in fixed-size, chunk-aligned arraylets +// (start_idx is a multiple of EJS_ARRAYLET_SIZE, alloc == length == +// EJS_ARRAYLET_SIZE, every slot initialized — holes are the same magic +// as dense holes). The arraylet list is kept sorted by start_idx; +// aligned chunks can never overlap. + +#define EJS_ARRAYLET_SIZE 512 + +// address of idx's slot, or NULL if its chunk doesn't exist (and +// create is false). Newly created chunks are all holes. +static ejsval* +sparse_element_addr (EJSArray* arr, int64_t idx, EJSBool create) +{ + int64_t chunk_start = idx & ~((int64_t)EJS_ARRAYLET_SIZE - 1); + + int lo = 0, hi = (int)arr->sparse.arraylet_num; + while (lo < hi) { + int mid = (lo + hi) / 2; + if (arr->sparse.arraylets[mid].start_idx < chunk_start) + lo = mid + 1; + else + hi = mid; + } + if (lo < arr->sparse.arraylet_num && arr->sparse.arraylets[lo].start_idx == chunk_start) + return &arr->sparse.arraylets[lo].elements[idx - chunk_start]; + + if (!create) + return NULL; + + if (arr->sparse.arraylet_num == arr->sparse.arraylet_alloc) { + arr->sparse.arraylet_alloc = arr->sparse.arraylet_alloc ? arr->sparse.arraylet_alloc * 2 : 5; + arr->sparse.arraylets = (Arraylet*)realloc (arr->sparse.arraylets, arr->sparse.arraylet_alloc * sizeof(Arraylet)); + } + memmove (&arr->sparse.arraylets[lo + 1], &arr->sparse.arraylets[lo], + (arr->sparse.arraylet_num - lo) * sizeof(Arraylet)); + arr->sparse.arraylet_num ++; + + Arraylet* al = &arr->sparse.arraylets[lo]; + al->start_idx = chunk_start; + al->length = EJS_ARRAYLET_SIZE; + al->alloc = EJS_ARRAYLET_SIZE; + al->elements = (ejsval*)malloc (EJS_ARRAYLET_SIZE * sizeof(ejsval)); + for (int i = 0; i < EJS_ARRAYLET_SIZE; i ++) + al->elements[i] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); + + return &al->elements[idx - chunk_start]; +} + +// drop element storage at and above new_len (a length shrink) +static void +sparse_truncate (EJSArray* arr, int64_t new_len) +{ + while (arr->sparse.arraylet_num > 0) { + Arraylet* al = &arr->sparse.arraylets[arr->sparse.arraylet_num - 1]; + if (al->start_idx >= new_len) { + free (al->elements); + arr->sparse.arraylet_num --; + continue; + } + // sorted: only the last surviving chunk can straddle new_len + for (int64_t i = new_len - al->start_idx; i < al->length; i ++) + al->elements[i] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); + break; + } +} + +// pushes the name ("0", "1", ...) of every present (non-hole) index +// property of array onto out (a dense array), in ascending order. +// Iterates storage, not length — a `new Array(1e9)` has no index +// properties and costs nothing here. +void +_ejs_array_push_own_index_names (ejsval array, ejsval out) +{ + if (EJSVAL_IS_SPARSE_ARRAY(array)) { + EJSArray* arr = (EJSArray*)EJSVAL_TO_OBJECT(array); + for (int i = 0; i < arr->sparse.arraylet_num; i ++) { + Arraylet* al = &arr->sparse.arraylets[i]; + for (int64_t j = 0; j < al->length; j ++) { + if (al->start_idx + j >= EJSARRAY_LEN(arr)) + break; + if (EJSVAL_IS_ARRAY_HOLE_MAGIC(al->elements[j])) + continue; + ejsval name = ToString(NUMBER_TO_EJSVAL(al->start_idx + j)); + _ejs_array_push_dense(out, 1, &name); + } + } + } + else { + for (int64_t i = 0; i < EJS_ARRAY_LEN(array); i ++) { + if (EJSVAL_IS_ARRAY_HOLE_MAGIC(EJS_DENSE_ARRAY_ELEMENTS(array)[i])) + continue; + ejsval name = ToString(NUMBER_TO_EJSVAL(i)); + _ejs_array_push_dense(out, 1, &name); + } + } +} + static ejsval _ejs_array_specop_get (ejsval obj, ejsval propertyName, ejsval receiver) { @@ -2741,7 +2840,16 @@ _ejs_array_specop_get (ejsval obj, ejsval propertyName, ejsval receiver) //printf ("getprop(%d) on an array, returning undefined\n", idx); return _ejs_undefined; } - ejsval rv = EJS_DENSE_ARRAY_ELEMENTS(obj)[idx]; + ejsval rv; + if (EJSVAL_IS_SPARSE_ARRAY(obj)) { + ejsval* slot = sparse_element_addr ((EJSArray*)EJSVAL_TO_OBJECT(obj), idx, EJS_FALSE); + if (!slot) + return _ejs_undefined; + rv = *slot; + } + else { + rv = EJS_DENSE_ARRAY_ELEMENTS(obj)[idx]; + } if (EJSVAL_IS_ARRAY_HOLE_MAGIC(rv)) return _ejs_undefined; return rv; @@ -2777,10 +2885,18 @@ _ejs_array_specop_get_own_property (ejsval obj, ejsval propertyName, ejsval *exc if (is_index) { if (idx >= 0 && idx < EJS_ARRAY_LEN(obj)) { + ejsval el; + if (EJSVAL_IS_SPARSE_ARRAY(obj)) { + ejsval* slot = sparse_element_addr ((EJSArray*)EJSVAL_TO_OBJECT(obj), idx, EJS_FALSE); + el = slot ? *slot : MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); + } + else { + el = EJS_DENSE_ARRAY_ELEMENTS(obj)[idx]; + } // XXX we leak this. need to change get_own_property to use an out param instead of a return value EJSPropertyDesc* desc = (EJSPropertyDesc*)calloc(sizeof(EJSPropertyDesc), 1); _ejs_property_desc_set_writable (desc, EJS_TRUE); - _ejs_property_desc_set_value (desc, EJS_DENSE_ARRAY_ELEMENTS(obj)[idx]); + _ejs_property_desc_set_value (desc, el); return desc; } } @@ -2835,8 +2951,8 @@ _ejs_array_specop_set (ejsval obj, ejsval propertyName, ejsval val, ejsval recei EJS_GC_REMEMBER(obj, val); } else { - // we're already sparse, just give up as none of this is implemented yet. - EJS_NOT_IMPLEMENTED(); + *sparse_element_addr ((EJSArray*)EJSVAL_TO_OBJECT(obj), idx, EJS_TRUE) = val; + EJS_GC_REMEMBER(obj, val); } EJS_ARRAY_LEN(obj) = MAX(EJS_ARRAY_LEN(obj), idx + 1); return EJS_TRUE; @@ -2857,9 +2973,9 @@ _ejs_array_specop_set (ejsval obj, ejsval propertyName, ejsval val, ejsval recei EJS_DENSE_ARRAY_ELEMENTS(obj)[i] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); } } - else { - // we're already sparse, just give up as none of this is implemented yet. - EJS_NOT_IMPLEMENTED(); + else if (newLen < oldLen) { + // growth needs no storage (holes are implicit) + sparse_truncate ((EJSArray*)EJSVAL_TO_OBJECT(obj), newLen); } EJS_ARRAY_LEN(obj) = newLen; @@ -2886,7 +3002,16 @@ _ejs_array_specop_has_property (ejsval obj, ejsval propertyName) if (floor(n) == n) { idx = (int)n; if (idx >= 0 && idx < EJS_ARRAY_LEN(obj)) { - ejsval element = EJS_DENSE_ARRAY_ELEMENTS(obj)[idx]; + ejsval element; + if (EJSVAL_IS_SPARSE_ARRAY(obj)) { + ejsval* slot = sparse_element_addr ((EJSArray*)EJSVAL_TO_OBJECT(obj), idx, EJS_FALSE); + if (!slot) + return EJS_FALSE; + element = *slot; + } + else { + element = EJS_DENSE_ARRAY_ELEMENTS(obj)[idx]; + } if (EJSVAL_IS_ARRAY_HOLE_MAGIC(element)) return EJS_FALSE; return EJS_TRUE; @@ -2921,8 +3046,16 @@ _ejs_array_specop_delete (ejsval obj, ejsval propertyName, EJSBool flag) return _ejs_Object_specops.Delete (obj, propertyName, flag); // if it's outside the array bounds, do nothing - if (idx < EJS_ARRAY_LEN(obj)) - EJS_DENSE_ARRAY_ELEMENTS(obj)[idx] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); + if (idx < EJS_ARRAY_LEN(obj)) { + if (EJSVAL_IS_SPARSE_ARRAY(obj)) { + ejsval* slot = sparse_element_addr ((EJSArray*)EJSVAL_TO_OBJECT(obj), idx, EJS_FALSE); + if (slot) + *slot = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); + } + else { + EJS_DENSE_ARRAY_ELEMENTS(obj)[idx] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); + } + } return EJS_TRUE; } @@ -2971,8 +3104,8 @@ _ejs_array_specop_define_own_property (ejsval obj, ejsval propertyName, EJSPrope EJS_GC_REMEMBER(obj, propertyDescriptor->value); } else { - // we're already sparse, just give up as none of this is implemented yet. - EJS_NOT_IMPLEMENTED(); + *sparse_element_addr ((EJSArray*)EJSVAL_TO_OBJECT(obj), idx, EJS_TRUE) = propertyDescriptor->value; + EJS_GC_REMEMBER(obj, propertyDescriptor->value); } EJS_ARRAY_LEN(obj) = MAX(EJS_ARRAY_LEN(obj), idx + 1); return EJS_TRUE; @@ -2993,9 +3126,9 @@ _ejs_array_specop_define_own_property (ejsval obj, ejsval propertyName, EJSPrope EJS_DENSE_ARRAY_ELEMENTS(obj)[i] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); } } - else { - // we're already sparse, just give up as none of this is implemented yet. - EJS_NOT_IMPLEMENTED(); + else if (newLen < oldLen) { + // growth needs no storage (holes are implicit) + sparse_truncate ((EJSArray*)EJSVAL_TO_OBJECT(obj), newLen); } EJS_ARRAY_LEN(obj) = newLen; diff --git a/runtime/ejs-array.h b/runtime/ejs-array.h index ea2334a6..243cc882 100644 --- a/runtime/ejs-array.h +++ b/runtime/ejs-array.h @@ -97,6 +97,10 @@ void _ejs_array_init(ejsval global); uint32_t _ejs_array_push_dense (ejsval array, int argc, ejsval* args); ejsval _ejs_array_pop_dense (ejsval array); +// ascending "0","1",... names of the present index properties, pushed +// onto out (used by Object.getOwnPropertyNames) +void _ejs_array_push_own_index_names (ejsval array, ejsval out); + ejsval _ejs_array_join (ejsval array, ejsval sep); ejsval _ejs_array_from_iterables (int argc, ejsval* args); diff --git a/runtime/ejs-console.c b/runtime/ejs-console.c index 34aa9700..b9dffe79 100644 --- a/runtime/ejs-console.c +++ b/runtime/ejs-console.c @@ -42,6 +42,9 @@ console_toString(ejsval arg) { return EJSVAL_TO_SYMBOL(arg)->description; } else if (EJSVAL_IS_NUMBER(arg) || EJSVAL_IS_NUMBER_OBJECT(arg)) { + // node's inspect distinguishes -0 (ToString collapses it to "0") + if (EJSVAL_IS_NUMBER(arg) && EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(arg))) + return _ejs_string_new_utf8("-0"); return _ejs_number_to_string(arg); } else if (EJSVAL_IS_ARRAY(arg)) { @@ -56,8 +59,14 @@ console_toString(ejsval arg) { ejsval content_strings = _ejs_array_new(EJS_ARRAY_LEN(arg), EJS_FALSE); // XXX the loop below assumes arg is a dense array EJS_ASSERT(EJSVAL_IS_DENSE_ARRAY(arg)); + ejsval quote = _ejs_string_new_utf8("'"); for (int i = 0; i < EJS_ARRAY_LEN(arg); i ++) { - EJS_DENSE_ARRAY_ELEMENTS(content_strings)[i] = console_toString(EJS_DENSE_ARRAY_ELEMENTS(arg)[i]); + ejsval el = EJS_DENSE_ARRAY_ELEMENTS(arg)[i]; + // node's inspect quotes strings nested inside arrays + ejsval el_str = EJSVAL_IS_STRING(el) + ? _ejs_string_concatv (quote, el, quote, _ejs_null) + : console_toString(el); + EJS_DENSE_ARRAY_ELEMENTS(content_strings)[i] = el_str; } ejsval contents = _ejs_array_join (content_strings, comma_space); diff --git a/runtime/ejs-function.c b/runtime/ejs-function.c index 478e5af7..a6848229 100644 --- a/runtime/ejs-function.c +++ b/runtime/ejs-function.c @@ -8,6 +8,7 @@ #include "ejs-value.h" #include "ejs-ops.h" +#include "ejs-gc.h" #include "ejs-object.h" #include "ejs-shapes.h" #include "ejs-function.h" @@ -430,6 +431,34 @@ _ejs_invoke_closure (ejsval closure, ejsval* _this, uint32_t argc, ejsval* args, return OP(EJSVAL_TO_OBJECT(closure),Call) (closure, *_this, argc, args); } +// the .ll landing-pad wrappers (ejs-invoke-closure-catch.ll) +EJSBool _ejs_invoke_closure_catch_inner (ejsval* retval, ejsval closure, ejsval* _this, uint32_t argc, ejsval* args, ejsval newTarget); +EJSBool _ejs_invoke_func_catch_inner (ejsval* retval, ejsval(*func)(void*), void* data); + +// A C-side catch discards every emitted frame below it, but only +// emitted CATCH handlers re-link the gc-frame chain head — a C catcher +// must restore the head itself or the collector keeps walking the +// unwound (dead) frame records. +EJSBool +_ejs_invoke_closure_catch (ejsval* retval, ejsval closure, ejsval* _this, uint32_t argc, ejsval* args, ejsval newTarget) +{ + void* saved_gc_frame_head = _ejs_heap.gc_frame_head; + EJSBool ok = _ejs_invoke_closure_catch_inner (retval, closure, _this, argc, args, newTarget); + if (!ok) + _ejs_heap.gc_frame_head = saved_gc_frame_head; + return ok; +} + +EJSBool +_ejs_invoke_func_catch (ejsval* retval, ejsval(*func)(void*), void* data) +{ + void* saved_gc_frame_head = _ejs_heap.gc_frame_head; + EJSBool ok = _ejs_invoke_func_catch_inner (retval, func, data); + if (!ok) + _ejs_heap.gc_frame_head = saved_gc_frame_head; + return ok; +} + ejsval _ejs_construct_closure (ejsval _closure, ejsval* _this, uint32_t argc, ejsval* args, ejsval newTarget) { diff --git a/runtime/ejs-generator.c b/runtime/ejs-generator.c index 5aa0bd0e..ad218b25 100644 --- a/runtime/ejs-generator.c +++ b/runtime/ejs-generator.c @@ -121,7 +121,12 @@ _ejs_generator_start(EJSGenerator* gen) { _ejs_gc_push_generator(gen); ejsval undef_this = _ejs_undefined; - ejsval rv = _ejs_invoke_closure(gen->body, &undef_this, 0, NULL, _ejs_undefined); + // catch here: an uncaught throw out of the body must not unwind the + // generator stack past this frame (there is nothing above it but the + // makecontext trampoline). The exception is parked in yielded_value + // and rethrown by the resume site on the caller's stack. + ejsval rv; + EJSBool body_returned = _ejs_invoke_closure_catch(&rv, gen->body, &undef_this, 0, NULL, _ejs_undefined); // the body's return value is the final iteration result's value // (`function* g() { return 5; }` -> { value: 5, done: true }). @@ -130,7 +135,13 @@ _ejs_generator_start(EJSGenerator* gen) // collection triggered by this allocation must know that (found the hard way — // mark_thread_stack's range depends on the chain). gen->completed = EJS_TRUE; - gen->yielded_value = _ejs_create_iter_result(rv, _ejs_true); + if (body_returned) { + gen->yielded_value = _ejs_create_iter_result(rv, _ejs_true); + } + else { + gen->threw_out = EJS_TRUE; + gen->yielded_value = rv; + } _ejs_gc_remember(gen, gen->yielded_value); _ejs_gc_pop_generator(); } @@ -155,6 +166,7 @@ _ejs_generator_new (ejsval generator_body) rv->body = generator_body; rv->started = EJS_FALSE; rv->completed = EJS_FALSE; + rv->threw_out = EJS_FALSE; rv->throwing = EJS_FALSE; rv->returning = EJS_FALSE; rv->yielded_value = _ejs_undefined; @@ -208,6 +220,20 @@ _ejs_generator_yield (ejsval generator, ejsval arg) { return gen->sent_value; } +// every swap back from the generator lands here: if the body ended in +// an uncaught throw, rethrow it now — on the caller's stack +static ejsval +_ejs_generator_resume_result (EJSGenerator* gen) +{ + if (gen->threw_out) { + gen->threw_out = EJS_FALSE; + ejsval exc = gen->yielded_value; + gen->yielded_value = _ejs_undefined; + _ejs_throw (exc); + } + return gen->yielded_value; +} + static ejsval _ejs_generator_send (ejsval generator, ejsval arg) { EJSGenerator* gen = (EJSGenerator*)EJSVAL_TO_OBJECT(generator); @@ -217,7 +243,7 @@ _ejs_generator_send (ejsval generator, ejsval arg) { _ejs_gc_remember(gen, gen->sent_value); gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); - return gen->yielded_value; + return _ejs_generator_resume_result(gen); } static ejsval @@ -228,7 +254,7 @@ _ejs_generator_throw (ejsval generator, ejsval arg) { gen->throwing = EJS_TRUE; gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); - return gen->yielded_value; + return _ejs_generator_resume_result(gen); } // the unforgeable value .return() throws through the generator body to @@ -292,7 +318,7 @@ static EJS_NATIVE_FUNC(_ejs_Generator_prototype_return) { _ejs_gc_remember(gen, gen->sent_value); gen->caller_stack_top = (void*)&gen; // GC: the suspended segment starts here swapcontext(&gen->caller_context, &gen->generator_context); - return gen->yielded_value; + return _ejs_generator_resume_result(gen); } static EJS_NATIVE_FUNC(_ejs_Generator_prototype_next) { diff --git a/runtime/ejs-generator.h b/runtime/ejs-generator.h index c6fc9dee..0b387595 100644 --- a/runtime/ejs-generator.h +++ b/runtime/ejs-generator.h @@ -36,6 +36,12 @@ typedef struct _EJSGenerator { // dead context EJSBool completed; + // the body ended with an uncaught throw; yielded_value holds the + // exception, which the resume site rethrows on the CALLER's stack + // (unwinding it on the generator stack would walk off the + // makecontext frame) + EJSBool threw_out; + void* stack; size_t stack_size; diff --git a/runtime/ejs-invoke-closure-catch.ll b/runtime/ejs-invoke-closure-catch.ll index fe036cf6..42ddecaf 100644 --- a/runtime/ejs-invoke-closure-catch.ll +++ b/runtime/ejs-invoke-closure-catch.ll @@ -5,7 +5,7 @@ %EjsFuncType = type { } -define i32 @_ejs_invoke_closure_catch (%EjsValueType* nocapture %retval, %EjsValueType %closure, %EjsValueType* %_this, i32 %argc, %EjsValueType* nocapture readnone %args, %EjsValueType %newTarget) personality i8* bitcast (i32 (i32, i32, i64, i8*, i8*)* @__ejs_personality_v0 to i8*) { +define i32 @_ejs_invoke_closure_catch_inner (%EjsValueType* nocapture %retval, %EjsValueType %closure, %EjsValueType* %_this, i32 %argc, %EjsValueType* nocapture readnone %args, %EjsValueType %newTarget) personality i8* bitcast (i32 (i32, i32, i64, i8*, i8*)* @__ejs_personality_v0 to i8*) { entry: %rv_alloc = alloca i32 @@ -40,7 +40,7 @@ try_merge: ret i32 %rvload } -define i32 @_ejs_invoke_func_catch (%EjsValueType* nocapture %retval, i64 (i8*)* %func, i8* %data) personality i8* bitcast (i32 (i32, i32, i64, i8*, i8*)* @__ejs_personality_v0 to i8*) { +define i32 @_ejs_invoke_func_catch_inner (%EjsValueType* nocapture %retval, i64 (i8*)* %func, i8* %data) personality i8* bitcast (i32 (i32, i32, i64, i8*, i8*)* @__ejs_personality_v0 to i8*) { entry: %rv_alloc = alloca i32 diff --git a/runtime/ejs-math.c b/runtime/ejs-math.c index cd9baa20..35e48b17 100644 --- a/runtime/ejs-math.c +++ b/runtime/ejs-math.c @@ -196,7 +196,16 @@ static EJS_NATIVE_FUNC(_ejs_Math_round) { if (isnan(x_)) return _ejs_nan; - return NUMBER_TO_EJSVAL(round (x_)); + // ES rounds ties toward +∞ (C round() ties away from zero). + // floor(x + 0.5) is exact on the remaining range: at |x| >= 2^52 + // there is no fractional part (and x + 0.5 could tie-to-even past + // an odd integer), and below 0.5 the addition can round up to 1.0 + // (x = 0.49999999999999994) — both screened off first. + if (fabs(x_) >= 4503599627370496.0 /* 2^52, also +-inf */) + return NUMBER_TO_EJSVAL(x_); + if (x_ >= -0.5 && x_ < 0.5) + return NUMBER_TO_EJSVAL(signbit(x_) ? -0.0 : 0.0); + return NUMBER_TO_EJSVAL(floor(x_ + 0.5)); } // ECMA262: 15.8.2.16 diff --git a/runtime/ejs-object.c b/runtime/ejs-object.c index 2f14b691..c693acdd 100644 --- a/runtime/ejs-object.c +++ b/runtime/ejs-object.c @@ -1416,23 +1416,39 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyDescriptor) { return FromPropertyDescriptor(desc); } -// ECMA262: 19.1.2.7 Object.getOwnPropertyNames ( O ) +// ECMA262: 19.1.2.7 Object.getOwnPropertyNames ( O ) static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyNames) { ejsval O = _ejs_undefined; if (argc > 0) O = args[0]; - /* 1. If Type(O) is not Object throw a TypeError exception. */ - if (!EJSVAL_IS_OBJECT(O)) { - _ejs_log ("throw TypeError, _this isn't an Object\n"); - EJS_NOT_IMPLEMENTED(); - } - EJSObject* O_ = EJSVAL_TO_OBJECT(O); + /* 1. Let obj be ToObject(O) (ES6: primitives coerce; null and + undefined throw). */ + ejsval obj = ToObject(O); + EJSObject* O_ = EJSVAL_TO_OBJECT(obj); /* 2. Let array be the result of creating a new object as if by the expression new Array () where Array is the standard built-in constructor with that name. */ ejsval arr = _ejs_array_new(0, EJS_FALSE); /* 3. Let n be 0. */ + // integer indices come first (OrdinaryOwnPropertyKeys order). + // Arrays and String objects keep their elements outside the + // property map, and both expose a virtual `length`. + if (EJSVAL_IS_ARRAY(obj)) { + _ejs_array_push_own_index_names(obj, arr); + ejsval length_name = _ejs_atom_length; + _ejs_array_push_dense(arr, 1, &length_name); + } + else if (EJSVAL_IS_STRING_OBJECT(obj)) { + ejsval prim = ((EJSString*)O_)->primStr; + for (int64_t i = 0; i < EJSVAL_TO_STRLEN(prim); i ++) { + ejsval idx_name = ToString(NUMBER_TO_EJSVAL(i)); + _ejs_array_push_dense(arr, 1, &idx_name); + } + ejsval length_name = _ejs_atom_length; + _ejs_array_push_dense(arr, 1, &length_name); + } + // shaped mode: shaped objects report their (all-enumerable, // string-keyed) shape fields in insertion order uint32_t O_shape = EJS_OBJECT_SHAPE(O_); @@ -1445,11 +1461,9 @@ static EJS_NATIVE_FUNC(_ejs_Object_getOwnPropertyNames) { return arr; } - /* 4. For each named own property P of O */ + /* 4. For each named own property P of O (enumerable or not — + only Object.keys/enumeration filter on the enumerable bit) */ for (_EJSPropertyMapEntry* s = O_->map->head_insert; s; s = s->next_insert) { - if (!_ejs_property_desc_is_enumerable(s->desc)) - continue; - /* a. Let name be the String value that is the name of P. */ ejsval name = s->name; diff --git a/runtime/ejs-ops.c b/runtime/ejs-ops.c index 4baf937f..09d01e17 100644 --- a/runtime/ejs-ops.c +++ b/runtime/ejs-ops.c @@ -2,6 +2,7 @@ * vim: set ts=4 sw=4 et tw=99 ft=cpp: */ +#include #include #include #include @@ -205,28 +206,101 @@ ejsval ToString(ejsval exp) EJS_NOT_IMPLEMENTED(); } +// ES WhiteSpace ∪ LineTerminator (the code points StringToNumber strips) +static EJSBool +is_js_whitespace(jschar c) +{ + switch (c) { + case 0x09: case 0x0A: case 0x0B: case 0x0C: case 0x0D: case 0x20: + case 0xA0: case 0x1680: case 0x2028: case 0x2029: case 0x202F: + case 0x205F: case 0x3000: case 0xFEFF: + return EJS_TRUE; + default: + return (c >= 0x2000 && c <= 0x200A); + } +} + +// ES 7.1.3.1 StringToNumber, on the whitespace-trimmed code units. +// strtod accepts spellings the StrNumericLiteral grammar doesn't +// ("inf", "nan", hex floats), so those are screened out up front. +static double +StringToNumber(const jschar* chars, int32_t len) +{ + while (len > 0 && is_js_whitespace(*chars)) { chars++; len--; } + while (len > 0 && is_js_whitespace(chars[len-1])) len--; + + if (len == 0) + return 0; + + char buf[128]; + char* num_utf8 = buf; + if (len + 1 > (int32_t)sizeof(buf)) + num_utf8 = (char*)malloc(len + 1); + // NaN on any non-ASCII code unit: every StrNumericLiteral is ASCII + for (int32_t i = 0; i < len; i++) { + if (chars[i] > 0x7f) { + if (num_utf8 != buf) free(num_utf8); + return nan(""); + } + num_utf8[i] = (char)chars[i]; + } + num_utf8[len] = 0; + + double d; + const char* body = num_utf8; + double sign = 1; + if (*body == '+' || *body == '-') { + if (*body == '-') sign = -1; + body++; + } + if ((body[0] == 'i' || body[0] == 'I') || (body[0] == 'n' || body[0] == 'N')) { + // of strtod's inf/nan spellings only exactly "Infinity" is a + // StrNumericLiteral + d = !strcmp(body, "Infinity") ? sign * INFINITY : nan(""); + } + else if (body[0] == '0' && (body[1] == 'b' || body[1] == 'B' || + body[1] == 'o' || body[1] == 'O')) { + // ES6 binary/octal literals (sign is not part of the grammar) + int base = (body[1] == 'b' || body[1] == 'B') ? 2 : 8; + d = (sign == 1 && body[2] != 0) ? 0 : nan(""); + for (const char* p = body + 2; *p && !isnan(d); p++) { + int digit = *p - '0'; + d = (digit >= 0 && digit < base) ? d * base + digit : nan(""); + } + } + else { + if (body[0] == '0' && (body[1] == 'x' || body[1] == 'X')) { + // strtod would also take a hex-float exponent, and a sign + // isn't part of the grammar + EJSBool ok = sign == 1 && body[2] != 0; + for (const char* p = body + 2; ok && *p; p++) + if (!isxdigit((unsigned char)*p)) ok = EJS_FALSE; + if (!ok) { + if (num_utf8 != buf) free(num_utf8); + return nan(""); + } + } + char* endptr; + d = strtod(num_utf8, &endptr); + if (*endptr != '\0') + d = nan(""); + } + + if (num_utf8 != buf) free(num_utf8); + return d; +} + ejsval ToNumber(ejsval exp) { if (EJSVAL_IS_NUMBER(exp)) return exp; else if (EJSVAL_IS_BOOLEAN(exp)) return EJSVAL_TO_BOOLEAN(exp) ? _ejs_one : _ejs_zero; + else if (EJSVAL_IS_NULL(exp)) + return _ejs_zero; else if (EJSVAL_IS_STRING(exp)) { - char num_utf8_buf[128]; - memset(num_utf8_buf, 0, sizeof(num_utf8_buf)); - char* num_utf8 = ucs2_to_utf8_buf(EJSVAL_TO_FLAT_STRING(exp), num_utf8_buf, sizeof(num_utf8_buf)); - if (num_utf8 == NULL) { - num_utf8 = ucs2_to_utf8(EJSVAL_TO_FLAT_STRING(exp)); - } - char *endptr; - double d = strtod(num_utf8, &endptr); - if (*endptr != '\0') { - if (num_utf8 != num_utf8_buf) free (num_utf8); - return _ejs_nan; - } - ejsval rv = NUMBER_TO_EJSVAL(d); // XXX NaN - if (num_utf8 != num_utf8_buf) free (num_utf8); - return rv; + EJSPrimString* flat = _ejs_string_flatten(exp); + return NUMBER_TO_EJSVAL(StringToNumber(flat->data.flat, flat->length)); } else if (EJSVAL_IS_SYMBOL(exp)) { _ejs_throw_nativeerror_utf8 (EJS_TYPE_ERROR, "1"); // XXX @@ -328,14 +402,14 @@ int64_t ToLength(ejsval exp) uint32_t ToUint32(ejsval exp) { - // XXX sorely lacking - return (uint32_t)ToDouble(exp); + // same modulo-2^32 wrap as ToInt32, reinterpreted unsigned + // (casting a negative double straight to uint32_t is UB) + return (uint32_t)ToInt32(exp); } uint16_t ToUint16(ejsval exp) { - // XXX sorely lacking - return (uint16_t)ToDouble(exp); + return (uint16_t)ToInt32(exp); } ejsval ToObject(ejsval exp) @@ -481,7 +555,11 @@ SameValue(ejsval x, ejsval y) // 2. ReturnIfAbrupt(y). // 3. If Type(x) is different from Type(y), return false. - if (EJSVAL_TO_TAG(x) != EJSVAL_TO_TAG(y)) return EJS_FALSE; + // (numbers checked apart from the tag compare: ±0 and NaNs with + // different payloads carry different NaN-box tags but are the + // same Type) + if (EJSVAL_IS_NUMBER(x) != EJSVAL_IS_NUMBER(y)) return EJS_FALSE; + if (!EJSVAL_IS_NUMBER(x) && EJSVAL_TO_TAG(x) != EJSVAL_TO_TAG(y)) return EJS_FALSE; // 4. If Type(x) is Undefined, return true. if (EJSVAL_IS_UNDEFINED(x)) return EJS_TRUE; @@ -491,16 +569,16 @@ SameValue(ejsval x, ejsval y) // 6. If Type(x) is Number, then if (EJSVAL_IS_NUMBER(x)) { + double dx = EJSVAL_TO_NUMBER(x); + double dy = EJSVAL_TO_NUMBER(y); // a. If x is NaN and y is NaN, return true. - if (isnan(EJSVAL_TO_NUMBER(x)) && isnan(EJSVAL_TO_NUMBER(y))) return EJS_TRUE; - // b. If x is +0 and y is -0, return false. - if (EJSVAL_TO_NUMBER(x) == 0.0 && EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(y))) return EJS_FALSE; - // c. If x is -0 and y is +0, return false. - if (EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(x)) == 0.0 && EJSVAL_TO_NUMBER(y) == 0) return EJS_FALSE; + if (isnan(dx) && isnan(dy)) return EJS_TRUE; + // b/c. +0 and -0 are different values. + if (dx == 0 && dy == 0) + return EJSDOUBLE_IS_NEGZERO(dx) == EJSDOUBLE_IS_NEGZERO(dy); // d. If x is the same Number value as y, return true. - if (EJSVAL_TO_NUMBER(x) == EJSVAL_TO_NUMBER(y)) return EJS_TRUE; // e. Return false. - return EJS_FALSE; + return dx == dy ? EJS_TRUE : EJS_FALSE; } // 7. If Type(x) is String, then if (EJSVAL_IS_STRING(x)) { @@ -536,9 +614,9 @@ SameValueZero(ejsval x, ejsval y) // 2. ReturnIfAbrupt(y). // 3. If Type(x) is different from Type(y), return false. - if ((EJSVAL_IS_NUMBER(x) != EJSVAL_IS_NUMBER(y)) && - (EJSVAL_TO_TAG(x) != EJSVAL_TO_TAG(y))) - return EJS_FALSE; + // (numbers checked apart from the tag compare, as in SameValue) + if (EJSVAL_IS_NUMBER(x) != EJSVAL_IS_NUMBER(y)) return EJS_FALSE; + if (!EJSVAL_IS_NUMBER(x) && EJSVAL_TO_TAG(x) != EJSVAL_TO_TAG(y)) return EJS_FALSE; // 4. If Type(x) is Undefined, return true. if (EJSVAL_IS_UNDEFINED(x)) return EJS_TRUE; @@ -548,16 +626,13 @@ SameValueZero(ejsval x, ejsval y) // 6. If Type(x) is Number, then if (EJSVAL_IS_NUMBER(x)) { + double dx = EJSVAL_TO_NUMBER(x); + double dy = EJSVAL_TO_NUMBER(y); // a. If x is NaN and y is NaN, return true. - if (isnan(EJSVAL_TO_NUMBER(x)) && isnan(EJSVAL_TO_NUMBER(y))) return EJS_TRUE; - // b. If x is +0 and y is -0, return true. - if (EJSVAL_TO_NUMBER(x) == 0.0 && EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(y))) return EJS_TRUE; - // c. If x is -0 and y is +0, return true. - if (EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(x)) && EJSVAL_TO_NUMBER(y) == 0) return EJS_TRUE; - // d. If x is the same Number value as y, return true. - if (EJSVAL_TO_NUMBER(x) == EJSVAL_TO_NUMBER(y)) return EJS_TRUE; + if (isnan(dx) && isnan(dy)) return EJS_TRUE; + // b/c/d. IEEE == : ±0 equal, same value equal. // e. Return false. - return EJS_FALSE; + return dx == dy ? EJS_TRUE : EJS_FALSE; } // 7. If Type(x) is String, then if (EJSVAL_IS_STRING(x)) { @@ -604,7 +679,7 @@ _ejs_op_not (ejsval exp) ejsval _ejs_op_bitwise_not (ejsval val) { - int val_int = ToInteger(val); + int32_t val_int = ToInt32(val); return NUMBER_TO_EJSVAL (~val_int); } @@ -617,7 +692,9 @@ _ejs_op_void (ejsval exp) ejsval _ejs_op_typeof_is_object(ejsval exp) { - return EJSVAL_IS_OBJECT(exp) ? _ejs_true : _ejs_false; + // must match _ejs_op_typeof: functions are "function", null is "object" + if (EJSVAL_IS_NULL(exp)) return _ejs_true; + return (EJSVAL_IS_OBJECT(exp) && !EJSVAL_IS_FUNCTION(exp)) ? _ejs_true : _ejs_false; } ejsval @@ -659,7 +736,8 @@ _ejs_op_typeof_is_boolean(ejsval exp) ejsval _ejs_op_typeof_is_null(ejsval exp) { - return EJSVAL_IS_NULL(exp) ? _ejs_true : _ejs_false; + // typeof never evaluates to "null" (typeof null is "object") + return _ejs_false; } int @@ -673,7 +751,7 @@ ejsval _ejs_op_typeof (ejsval exp) { if (EJSVAL_IS_NULL(exp)) - return _ejs_atom_null; + return _ejs_atom_object; else if (EJSVAL_IS_BOOLEAN(exp)) return _ejs_atom_boolean; else if (EJSVAL_IS_STRING(exp)) @@ -707,25 +785,9 @@ _ejs_op_delete (ejsval obj, ejsval prop) ejsval _ejs_op_mod (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs)) { - if (EJSVAL_IS_NUMBER(rhs)) { - return NUMBER_TO_EJSVAL (fmod(EJSVAL_TO_NUMBER(lhs), EJSVAL_TO_NUMBER(rhs))); - } - else { - // need to call valueOf() on the object, or convert the string to a number - EJS_NOT_IMPLEMENTED(); - } - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + double ld = ToDouble(lhs); + double rd = ToDouble(rhs); + return NUMBER_TO_EJSVAL (fmod(ld, rd)); } ejsval @@ -739,113 +801,41 @@ _ejs_op_bitwise_xor (ejsval lhs, ejsval rhs) ejsval _ejs_op_bitwise_and (ejsval lhs, ejsval rhs) { - int lhs_int = ToInteger(lhs); - int rhs_int = ToInteger(rhs); + int32_t lhs_int = ToInt32(lhs); + int32_t rhs_int = ToInt32(rhs); return NUMBER_TO_EJSVAL (lhs_int & rhs_int); } ejsval _ejs_op_bitwise_or (ejsval lhs, ejsval rhs) { - int lhs_int = ToInteger(lhs); - int rhs_int = ToInteger(rhs); + int32_t lhs_int = ToInt32(lhs); + int32_t rhs_int = ToInt32(rhs); return NUMBER_TO_EJSVAL (lhs_int | rhs_int); } ejsval _ejs_op_rsh (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs)) { - if (EJSVAL_IS_NUMBER(rhs)) { - return NUMBER_TO_EJSVAL ((int)((int)EJSVAL_TO_NUMBER(lhs) >> (((unsigned int)EJSVAL_TO_NUMBER(rhs)) & 0x1f))); - } - else { - // need to call valueOf() on the object, or convert the string to a number - EJS_NOT_IMPLEMENTED(); - } - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + return NUMBER_TO_EJSVAL (ToInt32(lhs) >> (ToUint32(rhs) & 0x1f)); } ejsval _ejs_op_ursh (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs)) { - if (EJSVAL_IS_NUMBER(rhs)) { - return NUMBER_TO_EJSVAL ((unsigned int)((unsigned int)EJSVAL_TO_NUMBER(lhs) >> (((unsigned int)EJSVAL_TO_NUMBER(rhs)) & 0x1f))); - } - else { - // need to call valueOf() on the object, or convert the string to a number - EJS_NOT_IMPLEMENTED(); - } - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + return NUMBER_TO_EJSVAL (ToUint32(lhs) >> (ToUint32(rhs) & 0x1f)); } ejsval _ejs_op_lsh (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs)) { - if (EJSVAL_IS_NUMBER(rhs)) { - return NUMBER_TO_EJSVAL ((int)((int)EJSVAL_TO_NUMBER(lhs) << (((unsigned int)EJSVAL_TO_NUMBER(rhs)) & 0x1f))); - } - else { - // need to call valueOf() on the object, or convert the string to a number - EJS_NOT_IMPLEMENTED(); - } - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + return NUMBER_TO_EJSVAL ((int32_t)((uint32_t)ToInt32(lhs) << (ToUint32(rhs) & 0x1f))); } ejsval _ejs_op_ulsh (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs)) { - if (EJSVAL_IS_NUMBER(rhs)) { - return NUMBER_TO_EJSVAL ((unsigned int)((unsigned int)EJSVAL_TO_NUMBER(lhs) << (((unsigned int)EJSVAL_TO_NUMBER(rhs)) & 0x1f))); - } - else { - // need to call valueOf() on the object, or convert the string to a number - EJS_NOT_IMPLEMENTED(); - } - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + return NUMBER_TO_EJSVAL (ToUint32(lhs) << (ToUint32(rhs) & 0x1f)); } ejsval @@ -858,9 +848,11 @@ _ejs_op_add (ejsval lhs, ejsval rhs) lprim = ToPrimitive(lhs, TO_PRIM_HINT_DEFAULT); rprim = ToPrimitive(rhs, TO_PRIM_HINT_DEFAULT); - if (EJSVAL_IS_STRING(lhs) || EJSVAL_IS_STRING(rhs)) { - ejsval lhstring = ToString(lhs); - ejsval rhstring = ToString(rhs); + // ES: the string test is on the ToPrimitive results (an object + // whose primitive is a string still concatenates) + if (EJSVAL_IS_STRING(lprim) || EJSVAL_IS_STRING(rprim)) { + ejsval lhstring = ToString(lprim); + ejsval rhstring = ToString(rprim); ejsval result = _ejs_string_concat (lhstring, rhstring); rv = result; @@ -875,37 +867,17 @@ _ejs_op_add (ejsval lhs, ejsval rhs) ejsval _ejs_op_mult (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs) || EJSVAL_IS_NUMBER(rhs)) { - return NUMBER_TO_EJSVAL (ToDouble(lhs) * ToDouble(rhs)); - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + double ld = ToDouble(lhs); + double rd = ToDouble(rhs); + return NUMBER_TO_EJSVAL (ld * rd); } ejsval _ejs_op_div (ejsval lhs, ejsval rhs) { - if (EJSVAL_IS_NUMBER(lhs)) { - return NUMBER_TO_EJSVAL (EJSVAL_TO_NUMBER(lhs) / ToDouble (rhs)); - } - else if (EJSVAL_IS_STRING(lhs)) { - // string+ with anything we don't implement yet - it will call toString() on objects, and convert a number to a string - EJS_NOT_IMPLEMENTED(); - } - else { - // object+... how does js implement this anyway? - EJS_NOT_IMPLEMENTED(); - } - - return _ejs_nan; + double ld = ToDouble(lhs); + double rd = ToDouble(rhs); + return NUMBER_TO_EJSVAL (ld / rd); } ejsval @@ -989,7 +961,9 @@ _ejs_op_ge (ejsval lhs, ejsval rhs) ejsval _ejs_op_sub (ejsval lhs, ejsval rhs) { - return NUMBER_TO_EJSVAL(ToDouble(lhs) - ToDouble(rhs)); + double ld = ToDouble(lhs); + double rd = ToDouble(rhs); + return NUMBER_TO_EJSVAL(ld - rd); } // ECMA262 7.2.13 @@ -997,34 +971,22 @@ _ejs_op_sub (ejsval lhs, ejsval rhs) ejsval _ejs_op_strict_eq (ejsval x, ejsval y) { + // Numbers first: a NaN-box tag compare can't see that -0 and +0 + // (different bit patterns) are the same Number value. IEEE == + // handles NaN (false) and ±0 (true) exactly per the spec. + if (EJSVAL_IS_NUMBER(x)) { + if (!EJSVAL_IS_NUMBER(y)) return _ejs_false; + return EJSVAL_TO_NUMBER(x) == EJSVAL_TO_NUMBER(y) ? _ejs_true : _ejs_false; + } + // 1. If Type(x) is different from Type(y), return false. if (EJSVAL_TO_TAG(x) != EJSVAL_TO_TAG(y)) return _ejs_false; - + // 2. If Type(x) is Undefined, return true. if (EJSVAL_IS_UNDEFINED(x)) return _ejs_true; // 3. If Type(x) is Null, return true. if (EJSVAL_IS_NULL(x)) return _ejs_true; - - // 4. If Type(x) is Number, then - if (EJSVAL_IS_NUMBER(x)) { - // a. If x is NaN, return false. - if (isnan(EJSVAL_TO_NUMBER(x))) return _ejs_false; - - // b. If y is NaN, return false. - if (isnan(EJSVAL_TO_NUMBER(y))) return _ejs_false; - - // c. If x is the same Number value as y, return true. - if (EJSVAL_TO_NUMBER(x) == EJSVAL_TO_NUMBER(y)) return _ejs_true; - - // d. If x is +0 and y is -0, return true. - if (EJSVAL_TO_NUMBER(x) == 0.0 && EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(y))) return _ejs_true; - // e. If x is -0 and y is +0, return true. - if (EJSDOUBLE_IS_NEGZERO(EJSVAL_TO_NUMBER(x)) == 0.0 && EJSVAL_TO_NUMBER(y) == 0) return _ejs_true; - - // f. Return false. - return _ejs_false; - } // 5. If Type(x) is String, then if (EJSVAL_IS_STRING(x)) { // a. If x and y are exactly the same sequence of characters (same length and same characters in corresponding positions), return true. @@ -1062,7 +1024,9 @@ _ejs_op_eq (ejsval x, ejsval y) // 1. ReturnIfAbrupt(x). // 2. ReturnIfAbrupt(y). // 3. If Type(x) is the same as Type(y), then - if (EJSVAL_TO_TAG(x) == EJSVAL_TO_TAG(y)) + // (numbers checked apart from the tag compare: ±0 carry + // different NaN-box tags but are the same Type) + if ((EJSVAL_IS_NUMBER(x) && EJSVAL_IS_NUMBER(y)) || EJSVAL_TO_TAG(x) == EJSVAL_TO_TAG(y)) // a. Return the result of performing Strict Equality Comparison x === y. return _ejs_op_strict_eq(x, y); // 4. If x is null and y is undefined, return true. diff --git a/test/expected/proxy6.js.expected-out b/test/expected/proxy6.js.expected-out index a16476b4..26508b6f 100644 --- a/test/expected/proxy6.js.expected-out +++ b/test/expected/proxy6.js.expected-out @@ -1,4 +1,4 @@ -[ Internet Explorer, Netscape ] -[ Firefox ] -[ Firefox, Chrome ] +[ 'Internet Explorer', 'Netscape' ] +[ 'Firefox' ] +[ 'Firefox', 'Chrome' ] Chrome diff --git a/test/expected/typeof1.js.expected-out b/test/expected/typeof1.js.expected-out index 80bb7b58..c1a99152 100644 --- a/test/expected/typeof1.js.expected-out +++ b/test/expected/typeof1.js.expected-out @@ -1,5 +1,5 @@ undefined -null +object string number object diff --git a/test/math2.js b/test/math2.js index 0b3d30f2..56442ba4 100644 --- a/test/math2.js +++ b/test/math2.js @@ -1,3 +1 @@ -// xfail: XXX - console.log(-0 === 0); diff --git a/test/proxy6.js b/test/proxy6.js index 6a80a632..5af17f91 100644 --- a/test/proxy6.js +++ b/test/proxy6.js @@ -1,4 +1,3 @@ -// generator: none // from MDN let products = new Proxy( diff --git a/test/sparsearray1.js b/test/sparsearray1.js index 4eeebdbd..21302e46 100644 --- a/test/sparsearray1.js +++ b/test/sparsearray1.js @@ -1,4 +1,3 @@ -// xfail: sparse array support is pretty weak and full of NOT_IMPLEMENTED's var arr = new Array(1000000000); arr[0] = "Hello World"; console.log(arr[0]); diff --git a/test/typeof1.js b/test/typeof1.js index b1792f0f..c6f47995 100644 --- a/test/typeof1.js +++ b/test/typeof1.js @@ -1,7 +1,3 @@ -// generator: none -// we can't generate using babel-node since typeof null is 'object' -// under node (at least the versions we run against.) - console.log(typeof undefined); console.log(typeof null); console.log(typeof "hi"); From b1736f89c762863dbafdac2b063c23e728f54f4d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 29 Jul 2026 08:18:46 -0700 Subject: [PATCH 131/146] =?UTF-8?q?eir:=20runtime-P2=20(P7.2)=20=E2=80=94?= =?UTF-8?q?=20export-boundary=20wrapper=20+=20escape-taint=20fence?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Escaping entry points (module exports, closures passed as arguments) now get a typed fast path. The wrapper: a has_tag(number) guard per formal spliced into the generic entry, dispatching via call_typed to a new UNTRUSTED clone flavor (SpecMode.trusted=false) — f64 formals boxed once at entry, ordinary guarded diamonds inside (assume-and- guard gate: only a positive non-number claim declines), boxed result. The entry boxes are structural number proofs, so the formal-rooted diamonds fold trust-free to trusted-clone quality: types-bench5 (exported kernel, every call cross-module) runs 0.34s -> 0.07s user, exact PARITY with types-bench1's closed-world trusted path. The wrapper deliberately does NOT dispatch to the trusted clone (the plan's sketch): maam's value domain is constant propagation, so its claims can be conditioned on analyzed argument CONSTANTS (it prunes y>5 under y=3) — tag guards cannot re-establish that entry state for external callers, numbers included. The same argument exposed a PRE-EXISTING cross-module miscompile: trusted rewrites of call sites HOSTED in escaping functions (external f(7) crossing g's constant-pruned branch -> unguarded unbox of "s"). Fixed by the escape-taint fence: tainted = escaping closures, closed under callee-of-tainted-hosted-site + created-in-tainted-host; no trusted clone for escapees, no trusted rewrite of tainted-hosted sites. Covered code runs only during module init (before any external caller exists), so its trusted machinery keeps its justification; the import-cycle corner is documented residual. No off-switch (it is a soundness fix); EJS_NO_EXPORT_WRAPPER bisects the wrapper alone. types-wrapperfence1 pins the bug (f(7) -> NaN, node-identical). Wrapper compiles take a second optimizeModule pass: the loop-carried number proofs only fit provenNumberAt's depth cap after cleanup's trivial-param pruning. Wrapper-free compiles skip it (byte-pure); flag-off compiles never enter any of this. Gates: eir unit tests 213 pass (11 standing compiler-P1.1 pins only); --types diff lane 476 files / 0 divergent / 1 N/A (tester.js); new probes types-wrapper1 + types-wrapperfence1 + types-bench5 flag-off- identical (specWrapped/specFenced telemetry added to the stats line); matrix: 5 stage lanes 425/20/0, lowtier e2e OK. Details in docs/runtime-p2-results.md. Co-Authored-By: Claude Fable 5 --- docs/plans.md | 8 +- docs/runtime-p2-results.md | 146 ++++++++++ docs/runtime-plan.md | 41 ++- lib/compiler.ts | 5 +- lib/eir/integrate.ts | 23 +- lib/eir/lower.ts | 75 ++++- lib/eir/specialize.ts | 388 +++++++++++++++++++++----- lib/eir/tests.ts | 98 ++++++- test/types/README.md | 19 +- test/types/types-bench5.js | 11 + test/types/types-bench5/lib.js | 16 ++ test/types/types-specescape1.js | 11 +- test/types/types-wrapper1.js | 9 + test/types/types-wrapper1/lib.js | 21 ++ test/types/types-wrapperfence1.js | 9 + test/types/types-wrapperfence1/lib.js | 18 ++ 16 files changed, 796 insertions(+), 102 deletions(-) create mode 100644 docs/runtime-p2-results.md create mode 100644 test/types/types-bench5.js create mode 100644 test/types/types-bench5/lib.js create mode 100644 test/types/types-wrapper1.js create mode 100644 test/types/types-wrapper1/lib.js create mode 100644 test/types/types-wrapperfence1.js create mode 100644 test/types/types-wrapperfence1/lib.js diff --git a/docs/plans.md b/docs/plans.md index df8b354c..7740d438 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -110,8 +110,12 @@ runtime-plan.md, compiler-plan.md. - [x] **P7.1** pinned runtime-bug burn-down (runtime-P1). DONE 2026-07-29 — docs/runtime-p1-results.md. -- [ ] **P7.2** export-boundary wrapper: specialization across escaping - entry points (runtime-P2). +- [x] **P7.2** export-boundary wrapper: specialization across escaping + entry points (runtime-P2). DONE 2026-07-29 — + docs/runtime-p2-results.md (wrapper dispatches to an UNTRUSTED + guarded clone — maam's constant-domain claims can't cross the + boundary — plus the escape-taint fence, closing a pre-existing + cross-module trusted-rewrite miscompile). - [ ] **P7.3** value-based test harness, un-pinning node's inspect format (runtime-P3). - [ ] **P7.4** finish the TypeScript port of the compiler; babel step diff --git a/docs/runtime-p2-results.md b/docs/runtime-p2-results.md new file mode 100644 index 00000000..bf75f9fa --- /dev/null +++ b/docs/runtime-p2-results.md @@ -0,0 +1,146 @@ +# runtime-P2 results — the export-boundary wrapper + the escape-taint fence + +Phase P7.2 (docs/plans.md), bucket runtime-plan.md. Landed 2026-07-29 +on branch `eir`. The standing follow-on recorded by maam-plan (P3.6: +"the boundary-guard wrapper dispatching escaping entries to the clone +remains OPEN follow-on work") and sinking-plan, paid down — with one +deliberate design change from the sketch, and one pre-existing +soundness bug found and fixed on the way. + +## Why the wrapper does NOT dispatch to the trusted clone + +The plan sketch said "generic signature outside, dispatching to +specialized/trusting internals." That is unsound, and the reason is +maam's value domain: **constant propagation** (numbers and strings are +tracked as constants up to a widening bound — src/lang/values.ts in +echojs-maam). A claim maam makes about an escaping function's body can +be conditioned on the argument *constants* its analyzed call sites +passed — e.g. it prunes a `y > 5` branch entirely under `y = 3` — so +the claim can be false for an external call passing 7: a NUMBER. A +boundary tag guard proves tags, not maam's entry state, so no has_tag +chain can license entering a trusted (unguarded, SpecMode) clone from +an un-analyzed caller. + +What the wrapper dispatches to instead is an **untrusted clone** +(SpecMode.trusted = false, lower.ts): + +- typed signature: f64 formals, boxed once at entry — `box_f64` is the + optimizer's structural number proof; +- the body keeps the ordinary guarded diamonds; the diamond gate widens + to assume-and-guard (`operandPlausiblyNumber`: only a POSITIVE + non-number claim declines — nodes the oracle never saw, the norm for + an exported-but-never-called-internally function, guard rather than + decline); +- result stays boxed ("any"); no unguarded return unbox. + +The optimizer then folds the formal-rooted diamonds *structurally* — +no oracle claim is ever consumed as fact. The unit test asserts the +strong version: the optimized clone of the standard loop kernel carries +ZERO has_tag guards and raw f64 arithmetic, i.e. trusted-clone quality, +trust-free. (One enabling fix: wrapper compiles run a second +optimizeModule pass after specialization — the loop-carried number +proofs only fit provenNumberAt's depth cap after cleanup's +trivial-param pruning, which runs at a pass's tail. Wrapper-free +compiles skip it, byte-pure.) + +The wrapper itself (specialize.ts installWrapper): a fresh entry block +takes over the calling-convention params; one `has_tag(number)` per +formal chains to a fast block (unbox all, `call_typed` the clone, +return its boxed result); any failure branches to the untouched +original entry — the generic body, full dynamic semantics. Both +external callers (through the module slot) and internal ones (devirt +direct-calls the generic entry; LLVM inlines the prologue) reach the +same guards. Candidacy: escaping closure + the static callee checks +(no rest/arguments/defaults, identifier params, ≥1 formal) + a payoff +check (the lowered clone must emit ≥1 diamond). `EJS_NO_EXPORT_WRAPPER` +bisects. + +## The pre-existing bug: trusted rewrites inside escaping functions + +The same coverage argument turned up a live miscompile that PREDATES +this phase: call sites *hosted inside* an escaping function were being +rewritten to trusted clones. An external caller enters the escaping +function with values the analysis never saw; those values flow to the +hosted site; the rewrite unboxes them unguarded against claims derived +from module-internal constants. types-wrapperfence1 pins the exact +shape: + +```js +function g(y) { var s = y > 5 ? "s" : y; return s * 2; } // private +export function f(x) { return g(x); } +console.log(g(3)); console.log(f(3)); // analyzed +``` + +maam prunes `y > 5` under the analyzed 3, types `s * 2` as num, g +trusted-clones, and the g-site inside f rewrote to `unbox_f64` of an +argument that is `"s"` when main calls `f(7)` — garbage where node +prints NaN. (Verified live before the fix by the probe's stats: +`specialized=1` proves the claim existed.) + +**The fix — the escape-taint fence** (specialize.ts): `tainted` = the +set of Funcs whose activations can observe un-analyzed values — the +escaping closures, closed under (a) callee-of-a-site-hosted-in-tainted +(arguments are tainted) and (b) created-inside-tainted (captured +environment is tainted). Unknown-callee calls need no edge: a value +only becomes callable from tainted code by flowing there, which +already classifies its function as escaping. Rules: + +- an escaping function never gets a trusted clone (it takes the + wrapper path); +- no site hosted in a tainted function is rewritten to a trusted + clone (`specFenced` counts them; a clone with no coverable site is + not minted); +- a tainted-but-non-escaping helper MAY still be trusted-cloned: the + clone is entered only through rewritten sites in covered code, and + every covered activation runs during module init — before any + external caller can exist. Its tainted (generic-entry) activations + run the generic body. + +Residual, documented: an import cycle can re-enter a partially +initialized module, so "covered code runs before external callers" has +that one corner; taint does not model it. The fence has no off-switch +— it is a soundness fix, not an optimization. + +## Gates + +- **eir unit tests**: 213 pass (the 11 standing compiler-P1.1 + born-shaped pins remain, untouched by this phase). New tests: the + wrapper's structure and full guard-fold, decline paths (no payoff / + env capture / frame ops), EJS_NO_EXPORT_WRAPPER, and the sharpened + escaping-closures test (wrapped, never trusted, even under a lying + stub oracle). +- **--types diff lane**: 476 files — 475 identical, 0 divergent, 1 N/A + (tester.js, the standing esprima gap). Includes the new probes. +- **probes** (test/types/README.md census updated): + - types-wrapper1: `specWrapped=1`; numbers cross the boundary into + the clone, a string and a missing arg fail the chain onto the + generic body; flag-off/--types identical. + - types-wrapperfence1: `specialized=1 specSites=1 specFenced=1`; + `f(7)` → NaN, node-identical (the divergence this would have been + is the pinned bug). + - types-specescape1 (existing): now `specWrapped=1`, still identical + and node-matching. + - types-wrongoracle1 (existing): lib's exported `inc` now wrapped; + `inc("x")` still routes generic → "x1". +- **types-bench5** (the headline): the types-bench1 workload with the + kernel EXPORTED and every call crossing the module boundary. + flag-off 0.34 s → **0.07 s user** with the wrapper (~4.9×), exact + PARITY with types-bench1's closed-world trusted path on the same + machine — the export boundary now costs one has_tag per formal per + call. +- **bootstrap matrix**: recorded in the phase-close commit (flag-off + compiles are byte-pure by construction — specialization only runs + under --types, and the second optimizer pass only when a wrapper was + minted). + +## Follow-ons recorded + +- wrappers / guarded per-site dispatch for tainted-called internal + helpers (today they simply stay generic inside tainted hosts); +- a payoff gate that credits call-heavy bodies — a bare delegation + export (`export function f(x) { return g(x); }`) currently declines + its wrapper (`specRejected=1` in types-wrapperfence1); +- maam-side escape hardening (synthetic ⊤-argument entry contexts for + escaping closures) would let the oracle itself account for external + callers — heap flows included — and dissolve the import-cycle + residual. diff --git a/docs/runtime-plan.md b/docs/runtime-plan.md index d6cf6d3f..313033ba 100644 --- a/docs/runtime-plan.md +++ b/docs/runtime-plan.md @@ -33,13 +33,40 @@ performance bucket owns. - `getOwnPropertyNames`: non-enumerables included, primitives ToObject-coerced, array/String index properties + `length` reported. -- [ ] **runtime-P2 — Export-boundary wrapper.** Escaping entry points - currently pin down specialization and unguarded-consumption - opportunities (the compiler buckets decline them). A generated - boundary wrapper — generic signature outside, dispatching to - specialized/trusting internals — lets module-internal call graphs - optimize while exports keep full dynamic semantics. (Referenced - by maam-plan and sinking-plan as the standing follow-on.) +- [x] **runtime-P2 — Export-boundary wrapper.** Escaping entry points + previously pinned down specialization entirely (the compiler + buckets declined them). DONE 2026-07-29 — + docs/runtime-p2-results.md. What landed, and why the shape + differs from the original sketch ("dispatching to + specialized/trusting internals"): + - maam's value domain is CONSTANT-PROPAGATION, so its claims + about an escaping function's body may hold only for the + argument constants it analyzed — boundary tag guards cannot + re-establish them for external callers. The wrapper therefore + dispatches to an UNTRUSTED clone: f64 formals boxed once at + entry (the optimizer's structural number proof), ordinary + guarded diamonds inside (assume-and-guard gate), boxed result. + The formal-rooted diamonds fold trust-free to trusted-clone + quality — types-bench5 (exported kernel, cross-module hot + loop) runs at PARITY with the closed-world trusted path. + - the same analysis-coverage argument exposed a PRE-EXISTING + cross-module miscompile: trusted rewrites inside escaping + functions consumed claims external callers can violate + (types-wrapperfence1 pins it: a constant-pruned branch + + an external 7 → unguarded unbox of a string). Fixed by the + escape-taint fence: taint = escaping closures, closed under + callee-of-tainted-hosted-site and created-in-tainted-host; no + trusted clone for escapees, no trusted rewrite of + tainted-hosted sites. Covered (untainted) code runs only + during module init — before an external caller can exist — so + its trusted machinery keeps its whole-program justification + (residual, documented: an import cycle can re-enter mid-init; + not modeled). + - EJS_NO_EXPORT_WRAPPER bisects the wrapper; the fence has no + off-switch (it is a soundness fix). Follow-on recorded: + wrappers/guarded dispatch for tainted-called internal helpers, + and a payoff gate that credits call-heavy bodies (a bare + delegation export currently declines). - [ ] **runtime-P3 — Value-based test harness.** Test baselines are generated live by `node ` and are sensitive to node's console.log inspect-format drift (22.4 → 22.23 changed array diff --git a/lib/compiler.ts b/lib/compiler.ts index 95a3be45..74f9921b 100644 --- a/lib/compiler.ts +++ b/lib/compiler.ts @@ -1104,7 +1104,10 @@ export function compile( // specialization telemetry, present only when it ran (lowered.spec ? ` specialized=${lowered.spec.specialized} specSites=${lowered.spec.sites}` + - ` specRejected=${lowered.spec.rejected}` + ` specRejected=${lowered.spec.rejected}` + + // boundary-wrapper telemetry (additive) + (lowered.spec.wrapped > 0 ? ` specWrapped=${lowered.spec.wrapped}` : "") + + (lowered.spec.fenced > 0 ? ` specFenced=${lowered.spec.fenced}` : "") : "") + // shape telemetry, present only when sites were consulted ((lowered.shape_sites ?? 0) > 0 diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 2a44fa0a..02804aee 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -529,7 +529,7 @@ export function collectEIRToplevel( // guards fold; loop joins go raw; dead closures/loads drop). // EJS_NO_EIR_SPEC=1 bisects specialization alone. if (oracle && !process.env["EJS_NO_EIR_SPEC"]) { - spec_stats = { specialized: 0, sites: 0, rejected: 0 }; + spec_stats = { specialized: 0, sites: 0, rejected: 0, wrapped: 0, fenced: 0 }; const changed = specializeModule( eir_module, analysis, @@ -542,14 +542,31 @@ export function collectEIRToplevel( verifyModule(eir_module); optimizeModule(eir_module, info.name); verifyModule(eir_module); + // untrusted (wrapper) clones need a second pass: the + // loop-carried number proofs that fold their entry + // guards only fit provenNumberAt's depth cap after + // cleanup has pruned the trivial join params, and + // cleanup runs at the tail of a pass. Wrapper-free + // compiles skip it (byte-pure). + if (spec_stats.wrapped > 0) { + optimizeModule(eir_module, info.name); + verifyModule(eir_module); + } debug.log( 1, `EIR-spec: ${filename}: ${spec_stats.specialized} fn(s) specialized, ` + `${spec_stats.sites} call site(s) rewritten, ` + - `${spec_stats.rejected} clone(s) rejected` + `${spec_stats.rejected} clone(s) rejected, ` + + `${spec_stats.wrapped} boundary wrapper(s), ` + + `${spec_stats.fenced} site(s) fenced` ); } - if (spec_stats.specialized === 0 && spec_stats.rejected === 0) spec_stats = null; + if ( + spec_stats.specialized === 0 && + spec_stats.rejected === 0 && + spec_stats.wrapped === 0 + ) + spec_stats = null; } // constructor-result sinking: epoch-guarded diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index fe6fac36..c2743d07 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -87,19 +87,33 @@ export interface ModCtx { } // clone-lowering mode (specialize.ts). The clone gets an -// unboxed signature (f64 formals, boxed once at entry) and lowers -// oracle-number arithmetic UNGUARDED — no diamonds, no slow paths. -// This is the phase's deliberate unguarded-consumption line: oracle -// claims become facts, backed by the differential harness and by -// the escape analysis that gates which functions are cloned at all. +// unboxed signature (f64 formals, boxed once at entry); `trusted` +// selects how the body consumes the oracle: +// - trusted: oracle-number arithmetic lowers UNGUARDED — no diamonds, +// no slow paths. This is the deliberate unguarded-consumption +// line: oracle claims become facts, backed by the differential +// harness and by the escape analysis that restricts trusted clones +// to functions whose every runtime call the analysis covered. +// - untrusted (the export-boundary wrapper's clone, runtime-P2): the +// body keeps the ordinary guarded diamonds — the oracle is never +// consumed as fact, because the clone is entered from escaping +// entry points whose callers the analysis did NOT see (maam's +// constant-propagation domain may have pruned branches under +// call-site constants, so even all-number external arguments can +// escape its claims). The f64 formals are boxed once at entry; +// box_f64 is the optimizer's structural number proof, so +// formal-rooted diamonds fold trust-free. The diamond gate widens +// to assume-and-guard (see operandPlausiblyNumber). export interface SpecMode { cloneName: string; + trusted: boolean; // formal parameter types; "f64" formals arrive raw and are boxed once // at entry formals: ("any" | "f64")[]; - // when "f64", `return ` with an oracle-number argument returns - // the raw f64 (unguarded unbox); any other return shape survives to - // the structural post-check in specialize.ts, which discards the clone + // when "f64" (trusted clones only), `return ` with an + // oracle-number argument returns the raw f64 (unguarded unbox); any + // other return shape survives to the structural post-check in + // specialize.ts, which discards the clone result: "any" | "f64"; } @@ -777,12 +791,26 @@ class LowerFunction { // has_tag guards decide at runtime; only code size/speed change. const f64op = f64ops[n.operator]; if (f64op && this.operandIsNumber(n.left) && this.operandIsNumber(n.right)) { - // specialized-clone bodies consume the oracle UNGUARDED: no + // trusted-clone bodies consume the oracle UNGUARDED: no // diamond, no slow path — unbox, compute, re-box. Everywhere // else the guarded diamond stands. - if (this.spec) return this.trustedNumeric(f64op, l, r); + if (this.spec && this.spec.trusted) return this.trustedNumeric(f64op, l, r); return this.numericDiamond(f64op, op, l, r); } + // untrusted (wrapper) clone bodies assume-and-guard: the diamond + // is correct for ANY operand values, so a plausibly-number claim + // (not provably non-number — incl. nodes the oracle never saw, + // the norm for an exported-but-never-called-internally function) + // is enough to justify emitting it. The entry box_f64 proofs + // fold the formal-rooted ones; the rest keep their slow paths. + if ( + f64op && + this.spec && + !this.spec.trusted && + this.operandPlausiblyNumber(n.left) && + this.operandPlausiblyNumber(n.right) + ) + return this.numericDiamond(f64op, op, l, r); return this.b.emit(op, [l, r], {}); } @@ -834,6 +862,24 @@ class LowerFunction { return t.tags !== "top" && t.tags.size === 1 && t.tags.has("number"); } + // Could this operand be a number at runtime? The permissive twin of + // operandIsNumber, for untrusted-clone bodies only: a diamond's guard + // decides at runtime, so the only reason NOT to emit one is a proof + // it can never pass — a non-numeric literal, or an oracle answer that + // positively excludes number. top/unmapped nodes assume-and-guard. + operandPlausiblyNumber(node: e.Expression): boolean { + if (node.type === "Literal") return typeof node.value === "number"; + if ( + node.type === "UnaryExpression" && + (node.operator === "-" || node.operator === "+") && + node.argument.type === "Literal" + ) + return typeof (node.argument as e.Literal).value === "number"; + if (!this.oracle) return true; + const t = this.oracle.typeOfNode(node); + return t.tags === "top" || t.tags.has("number"); + } + // has_tag(l) -> has_tag(r) -> fast: unbox both, f64 op, rejoin boxed; // any guard failure -> slow: the generic op. The join param is an // ejsval: raw f64/i1 never crosses a block boundary (P2 verifier @@ -1706,13 +1752,14 @@ class LowerFunction { if (this.finallyCtx.length > 0) { if (this.runFinalizers(0)) return; // a finalizer overrode control } - // specialized clone with an f64 result: return the raw f64 + // trusted clone with an f64 result: return the raw f64 // (unguarded unbox — the same trust as trustedNumeric). // A return this can't prove leaves a boxed return that the // structural post-check in specialize.ts rejects, so a // clone never ships with a sig its returns don't honor. - if (this.spec && this.spec.result === "f64" && n.argument && - this.operandIsNumber(n.argument)) + // (untrusted clones always carry a boxed "any" result.) + if (this.spec && this.spec.trusted && this.spec.result === "f64" && + n.argument && this.operandIsNumber(n.argument)) rv = this.b.emit("unbox_f64", [rv], {}); this.b.ret(rv); return; @@ -2319,7 +2366,7 @@ export function lowerSpecializedClone( else { // expression-bodied arrow: same typed-return rule as ReturnStatement let rv = lf.expr(info.node.body); - if (spec.result === "f64" && lf.operandIsNumber(info.node.body as e.Expression)) + if (spec.trusted && spec.result === "f64" && lf.operandIsNumber(info.node.body as e.Expression)) rv = lf.b.emit("unbox_f64", [rv], {}); lf.b.ret(rv); } diff --git a/lib/eir/specialize.ts b/lib/eir/specialize.ts index afcf46e0..d8d36c23 100644 --- a/lib/eir/specialize.ts +++ b/lib/eir/specialize.ts @@ -34,10 +34,53 @@ // loads elsewhere keep the generic path (still enumerated — they // call the generic function, never the clone). // -// Module-level EXPORTS are never candidates: the slot-based module ABI -// exposes boxed ejsvals to JS and native consumers (non-promoted slots -// are readable through importer slot loads and accessor functions), so -// only promoted slots — invisible outside the module — qualify. +// Module-level EXPORTS are never trusted-specialization candidates: the +// slot-based module ABI exposes boxed ejsvals to JS and native +// consumers (non-promoted slots are readable through importer slot +// loads and accessor functions), so only promoted slots — invisible +// outside the module — qualify. +// +// --- the escape taint and the export-boundary wrapper (runtime-P2) --- +// +// The analysis maam runs covers THIS module's executions only. Any +// closure that escapes (canonically: stored in a non-promoted export +// slot) can be called by code the analysis never saw, and maam's value +// domain is constant-propagation — its claims about such a function's +// body may hold only for the argument CONSTANTS it analyzed, so even +// all-number external arguments can escape them. Two consequences: +// +// ESCAPE TAINT. `tainted` is the set of Funcs whose activations can +// observe un-analyzed values: the escaping closures themselves, +// closed under (a) the callee of any enumerated call site hosted in +// a tainted function (its arguments are tainted), and (b) any +// closure created inside a tainted function (its captured +// environment is tainted). Unknown-callee calls need no edge: a +// value only becomes callable from tainted code by flowing there, +// which classifies its function as escaping. Everything OUTSIDE the +// set runs only during module init — before any external caller can +// exist — so oracle claims about it keep their whole-program cover. +// (Residual, documented: an import CYCLE can re-enter a module +// mid-init; taint does not model that corner.) No call site HOSTED +// in a tainted function is ever rewritten to a trusted clone, and no +// ESCAPING function gets one. A tainted-but-non-escaping helper may +// still be trusted-cloned: the clone is entered only through +// rewritten sites in covered code, whose activations all run during +// init — its tainted (generic-entry) activations never reach it. +// +// THE WRAPPER. An escaping entry point still gets a typed fast +// path, but a trust-free one: an UNTRUSTED clone (guarded body — +// ordinary diamonds, assume-and-guard gate, boxed "any" result) with +// f64 formals boxed once at entry, plus a boundary wrapper spliced +// into the generic function's entry: one has_tag(number) guard per +// formal, all-pass dispatching to the clone via call_typed, any +// failure falling through to the original generic body. The entry +// box_f64 proofs let the optimizer fold the formal-rooted diamonds +// structurally, so the clone approaches trusted-clone quality +// without consuming a single oracle claim as fact — exports keep +// full dynamic semantics, external callers included. Internal +// callers reach the same guards through the generic entry (devirt +// direct-calls it; LLVM can inline the prologue). +// EJS_NO_EXPORT_WRAPPER=1 bisects the wrapper alone. import { Module, Func, Inst, Block } from "./ir"; import { Effect, opInfo } from "./ops"; @@ -55,6 +98,10 @@ export interface SpecStats { sites: number; // candidates whose lowered clone failed the structural post-checks rejected: number; + // escaping entry points that received a boundary wrapper + wrapped: number; + // call sites left generic because their host is escape-tainted + fenced: number; } // one use of a value: the using instruction and where the value appears @@ -102,6 +149,14 @@ function nodeIsNumber(oracle: TypeOracle, node: e.Node): boolean { return t.tags !== "top" && t.tags.size === 1 && t.tags.has("number"); } +// could this formal be a number at runtime? The wrapper's oracle use is +// heuristic only (guards decide) — decline only a POSITIVE non-number +// claim, where the guard chain could never pass. +function nodeMayBeNumber(oracle: TypeOracle, node: e.Node): boolean { + const t = oracle.typeOfNode(node); + return t.tags === "top" || t.tags.has("number"); +} + // the ReturnStatement nodes of fn's own body (nested functions excluded) function ownReturns(fnNode: e.Function): e.ReturnStatement[] { const out: e.ReturnStatement[] = []; @@ -146,6 +201,15 @@ interface CallSite { rewritable: boolean; } +// the structural closure-flow classification of one function +interface ClosureFlow { + // false when no make_closure for it remains (inlined/DCE'd) + referenced: boolean; + escapes: boolean; + // complete only when !escapes (the scan stops at the first escape) + sites: CallSite[]; +} + // find the Func containing an instruction's block (blocks know their fn) function fnOf(inst: Inst): Func { return inst.block!.fn; @@ -170,6 +234,89 @@ function comesBefore( return dominates(idom, ba, bb); } +// the escape-taint fixpoint (see the file comment). Monotone across +// rounds: wrapper clones are added by the caller at minting time; the +// edges a wrapper clone contributes duplicate its generic twin's (same +// AST, same sites, same children), so membership never grows late. +function computeEscapeTaint( + m: Module, + flows: Map, + funcsByName: Map, + tainted: Set +): void { + for (const [info, flow] of flows) if (flow.escapes) tainted.add(info.fn!); + for (;;) { + let grew = false; + // (a) a tainted host's call arguments are tainted values + for (const [info, flow] of flows) { + if (tainted.has(info.fn!)) continue; + if (flow.sites.some((s) => tainted.has(s.fn))) { + tainted.add(info.fn!); + grew = true; + } + } + // (b) a closure created in a tainted host captures tainted state + for (const fn of m.functions) { + if (!tainted.has(fn)) continue; + fn.forEachInst((inst) => { + if (inst.op !== "make_closure") return; + const child = funcsByName.get(inst.imms["fn"] as string); + if (child && !tainted.has(child)) { + tainted.add(child); + grew = true; + } + }); + } + if (!grew) break; + } +} + +// splice the boundary wrapper into fn's entry: a fresh entry block takes +// over the calling-convention params, one has_tag(number) guard per +// formal chains toward the fast block (all-number: unbox, call_typed +// the clone, return its boxed result), and any guard failure branches +// to the original entry — the untouched generic body. +function installWrapper(fn: Func, spec: SpecMode): void { + const oldEntry = fn.entry!; + const formals = oldEntry.params.slice(2); // [0]=%env [1]=%this + + const newEntry = new Block(fn, "wrapentry"); + newEntry.params = oldEntry.params; + for (const p of newEntry.params) p.block = newEntry; + oldEntry.params = []; + + const guards: Block[] = [newEntry]; + for (let i = 1; i < formals.length; i++) guards.push(new Block(fn, "wrapguard")); + const fast = new Block(fn, "wrapfast"); + for (const b of [...guards, fast]) b.sealed = true; + + for (let i = 0; i < formals.length; i++) { + const b = guards[i]!; + const t = new Inst(fn, "has_tag", [formals[i]!], { tag: "number" }); + const br = new Inst(fn, "cond_br", [t], {}); + for (const inst of [t, br]) { + inst.block = b; + b.insts.push(inst); + } + br.addTarget(i + 1 < formals.length ? guards[i + 1]! : fast, []); + br.addTarget(oldEntry, []); + } + + // the clone's ABI carries neither env nor `this` (post-checks + // guarantee both unused); the EIR-level env operand is never emitted + const envArg = new Inst(fn, "const", [], { kind: "undefined" }); + const unboxed = formals.map((f) => new Inst(fn, "unbox_f64", [f], {})); + const call = new Inst(fn, "call_typed", [envArg, ...unboxed], { fn: spec.cloneName }); + const ret = new Inst(fn, "return", [call], {}); + for (const inst of [envArg, ...unboxed, call, ret]) { + inst.block = fast; + fast.insts.push(inst); + } + + fn.blocks.splice(0, 0, ...guards, fast); + fn.entry = newEntry; +} + export function specializeModule( m: Module, analysis: ScopeAnalysis, @@ -183,11 +330,31 @@ export function specializeModule( // hypot2 through its slot) — each round re-enumerates over the module // as it now stands and rewrites what became visible. `cloned` // remembers per-function outcomes (SpecMode = clone shipped, null = - // clone rejected) so later rounds only add rewrites. + // clone rejected) so later rounds only add rewrites; `wrapped` + // remembers wrapper judgments (installed or declined) — a wrapper + // adds no rewritable sites, so one judgment is final. const cloned = new Map(); + const wrapped = new Map(); + // escape taint persists across rounds (wrapper clones join at + // minting time); fencedSeen keeps the fence count per-site + const tainted = new Set(); + const fencedSeen = new Set(); let changedAny = false; for (let round = 0; round < 5; round++) { - if (!specializeRound(m, analysis, oracle, this_module_info, mod_ctx, stats, cloned)) + if ( + !specializeRound( + m, + analysis, + oracle, + this_module_info, + mod_ctx, + stats, + cloned, + wrapped, + tainted, + fencedSeen + ) + ) break; changedAny = true; } @@ -201,13 +368,19 @@ function specializeRound( this_module_info: { exports: Map } | null, mod_ctx: ModCtx, stats: SpecStats, - cloned: Map + cloned: Map, + wrapped: Map, + tainted: Set, + fencedSeen: Set ): boolean { const uses = usesInModule(m); let toplevelFn: Func | null = null; for (const info of analysis.fnInfos.values()) if (info.isToplevel && info.fn) toplevelFn = info.fn; + const funcsByName = new Map(); + for (const fn of m.functions) funcsByName.set(fn.name, fn); + // %self slot -> stores/loads, and slot -> promoted? const selfStores = new Map(); const selfLoads = new Map(); @@ -248,50 +421,31 @@ function specializeRound( const calleeUse = (u: Use): boolean => u.user.op === "call" && u.operandIndex === 0 && !u.user.imms["direct"]; - let changed = false; - - for (const info of analysis.fnInfos.values()) { - if (info.isToplevel || !info.lowered || !info.fn) continue; - const node = info.node; - - // a candidate this call already judged: null = clone was rejected - // (don't re-lower it every round); a SpecMode = clone exists, only - // NEW call sites (in later-lowered clone bodies) need rewriting - const priorSpec = cloned.get(info); - if (priorSpec === null) continue; - - if (priorSpec === undefined) { - // --- static callee checks (AST side) ----------------------------- - if (info.restBinding || info.usesArguments) continue; - if ((info.defaults || []).some((d) => d != null)) continue; - if (!node.params.every((p) => p.type === "Identifier")) continue; - - // --- type profile: every formal and return exactly {number} ------ - if (!node.params.every((p) => nodeIsNumber(oracle, p))) continue; - const returns = ownReturns(node); - if (returns.length === 0) continue; - if (!returns.every((r) => r.argument && nodeIsNumber(oracle, r.argument))) continue; - } + // one pass over the module: every make_closure, indexed by callee name + const closuresByName = new Map(); + for (const fn of m.functions) { + fn.forEachInst((inst) => { + if (inst.op !== "make_closure") return; + const name = inst.imms["fn"] as string; + let l = closuresByName.get(name); + if (!l) closuresByName.set(name, (l = [])); + l.push(inst); + }); + } - // --- escape analysis (structural, oracle-free) ---------------------- - // every flow of the closure value must end in a plain-call callee - const closures: Inst[] = []; - for (const fn of m.functions) { - fn.forEachInst((inst) => { - if (inst.op === "make_closure" && inst.imms["fn"] === info.name) - closures.push(inst); - }); - } - if (closures.length === 0) continue; // unreferenced (or already gone) + // --- structural closure-flow (oracle-free), for every function ------- + // every flow of the closure value must end in a plain-call callee (or + // the single store into a promoted module-private slot); anything + // else is an escape. + const closureFlowOf = (info: FnInfo): ClosureFlow => { + const closures = closuresByName.get(info.name) || []; + if (closures.length === 0) return { referenced: false, escapes: false, sites: [] }; const sites: CallSite[] = []; - let escapes = false; for (const c of closures) { for (const u of uses.get(c) || []) { - if (u.operandIndex === -1) { - escapes = true; // crosses a block boundary as an edge arg - break; - } + if (u.operandIndex === -1) + return { referenced: true, escapes: true, sites }; // edge arg if (calleeUse(u)) { sites.push({ call: u.user, @@ -309,10 +463,8 @@ function specializeRound( ) { const slot = u.user.imms["slot"] as number; const stores = selfStores.get(slot) || []; - if (!promotedSlots.has(slot) || stores.length !== 1 || stores[0] !== u.user) { - escapes = true; - break; - } + if (!promotedSlots.has(slot) || stores.length !== 1 || stores[0] !== u.user) + return { referenced: true, escapes: true, sites }; const store = u.user; const storeFn = u.fn; // a store in the toplevel ENTRY block with no @@ -334,13 +486,10 @@ function specializeRound( } } } - let slotOk = true; for (const load of selfLoads.get(slot) || []) { for (const lu of uses.get(load) || []) { - if (lu.operandIndex === -1 || !calleeUse(lu)) { - slotOk = false; - break; - } + if (lu.operandIndex === -1 || !calleeUse(lu)) + return { referenced: true, escapes: true, sites }; // rewrite where the load provably yields this // closure: after a prefix-safe store, any load // except one earlier in the same entry block; @@ -359,20 +508,121 @@ function specializeRound( orderOk && !(lu.user.targets && lu.user.targets.length > 0); sites.push({ call: lu.user, fn: lu.fn, rewritable }); } - if (!slotOk) break; - } - if (!slotOk) { - escapes = true; - break; } continue; } - escapes = true; - break; + return { referenced: true, escapes: true, sites }; } - if (escapes) break; } - if (escapes || sites.length === 0) continue; + return { referenced: true, escapes: false, sites }; + }; + + const flows = new Map(); + for (const info of analysis.fnInfos.values()) { + if (info.isToplevel || !info.lowered || !info.fn) continue; + flows.set(info, closureFlowOf(info)); + } + + computeEscapeTaint(m, flows, funcsByName, tainted); + + let changed = false; + + for (const [info, flow] of flows) { + const node = info.node; + + // ===== escaping: the boundary-wrapper path ======================= + // (merely TAINTED functions — called from tainted hosts but not + // escaping themselves — stay on the trusted path below: their + // clones are entered only through rewritten sites in covered + // code, and the fence keeps tainted-hosted sites generic. + // Wrappers for tainted-called internal helpers / guarded + // per-site dispatch are the recorded follow-on.) + if (flow.escapes) { + if (wrapped.has(info)) continue; // judged (installed or declined) + if (process.env["EJS_NO_EXPORT_WRAPPER"]) continue; + if (!flow.referenced) continue; + + // static callee checks (AST side); >=1 formal or the guard + // chain guards nothing + if (info.restBinding || info.usesArguments) continue; + if ((info.defaults || []).some((d) => d != null)) continue; + if (!node.params.every((p) => p.type === "Identifier")) continue; + if (node.params.length === 0) continue; + // heuristic only (guards decide): skip formals the oracle + // POSITIVELY types non-number — the chain could never pass + if (!node.params.every((p) => nodeMayBeNumber(oracle, p))) continue; + // the entry must own the calling convention outright + if (info.fn!.entry!.predEdges.length > 0) continue; + + const spec: SpecMode = { + cloneName: uniqueCloneName(m, `${info.name}$wrap`), + trusted: false, + formals: node.params.map(() => "f64" as const), + result: "any", + }; + const diamondsBefore = mod_ctx.typed_stats ? mod_ctx.typed_stats.diamonds : 0; + const clone = lowerSpecializedClone(info, analysis, m, mod_ctx, spec); + const diamondsAfter = mod_ctx.typed_stats ? mod_ctx.typed_stats.diamonds : 0; + + // structural post-checks: the unboxed ABI carries neither env + // nor `this`, and no frame ops. Returns stay boxed ("any"), + // so no return check. Payoff check: a clone that emitted no + // diamonds has nothing for the entry proofs to fold. + const cloneUses = new Map(); + let ok = true; + clone.forEachInst((inst) => { + if (CLONE_FRAME_OPS.has(inst.op)) ok = false; + for (const o of inst.operands) cloneUses.set(o, (cloneUses.get(o) || 0) + 1); + if (inst.targets) + for (const t of inst.targets) + for (const a of t.args) + if (a) cloneUses.set(a, (cloneUses.get(a) || 0) + 1); + }); + const envParam = clone.entry!.params[0]!; + const thisParam = clone.entry!.params[1]!; + if ((cloneUses.get(envParam) || 0) > 0) ok = false; + if ((cloneUses.get(thisParam) || 0) > 0) ok = false; + if (!ok || diamondsAfter - diamondsBefore === 0) { + stats.rejected++; + wrapped.set(info, false); + continue; + } + m.addFunction(clone); + tainted.add(clone); // its activations ARE the external entries + installWrapper(info.fn!, spec); + stats.wrapped++; + wrapped.set(info, true); + changed = true; + continue; + } + + // ===== covered (analysis-complete): the trusted path ============= + + // a candidate this call already judged: null = clone was rejected + // (don't re-lower it every round); a SpecMode = clone exists, only + // NEW call sites (in later-lowered clone bodies) need rewriting + const priorSpec = cloned.get(info); + if (priorSpec === null) continue; + + if (priorSpec === undefined) { + // --- static callee checks (AST side) ----------------------------- + if (info.restBinding || info.usesArguments) continue; + if ((info.defaults || []).some((d) => d != null)) continue; + if (!node.params.every((p) => p.type === "Identifier")) continue; + + // --- type profile: every formal and return exactly {number} ------ + if (!node.params.every((p) => nodeIsNumber(oracle, p))) continue; + const returns = ownReturns(node); + if (returns.length === 0) continue; + if (!returns.every((r) => r.argument && nodeIsNumber(oracle, r.argument))) continue; + } + + if (!flow.referenced || flow.escapes || flow.sites.length === 0) continue; + const sites = flow.sites; + + // don't mint a clone no covered site will ever call (later rounds + // re-judge: freshly-lowered covered clones can add sites) + if (!priorSpec && !sites.some((s) => s.rewritable && !tainted.has(s.fn))) continue; let spec: SpecMode; if (priorSpec) { @@ -381,6 +631,7 @@ function specializeRound( // --- lower the clone (unguarded body, typed sig) ---------------- spec = { cloneName: uniqueCloneName(m, `${info.name}$typed`), + trusted: true, formals: node.params.map(() => "f64" as const), result: "f64", }; @@ -420,6 +671,15 @@ function specializeRound( // --- rewrite the provably-known call sites -------------------------- for (const site of sites) { if (!site.rewritable) continue; + // the escape-taint fence: a site hosted in tainted code sees + // values the analysis never covered — the generic call stands + if (tainted.has(site.fn)) { + if (!fencedSeen.has(site.call)) { + fencedSeen.add(site.call); + stats.fenced++; + } + continue; + } const call = site.call; const g = site.fn; const args = call.operands.slice(2); diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index a895b171..91d42b0a 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -1744,12 +1744,18 @@ function specHarness(src: string, oracle: TypeOracle) { verifyModule(module); optimizeModule(module); verifyModule(module); - const stats = { specialized: 0, sites: 0, rejected: 0 }; + const stats = { specialized: 0, sites: 0, rejected: 0, wrapped: 0, fenced: 0 }; const changed = specializeModule(module, analysis, oracle, null, mod_ctx, stats); verifyModule(module); if (changed) { optimizeModule(module); verifyModule(module); + // mirror integrate.ts: wrapper clones take a second pass (their + // loop-carried guard proofs need cleanup's param pruning first) + if (stats.wrapped > 0) { + optimizeModule(module); + verifyModule(module); + } } return { module: module, outer: fn, stats: stats }; } @@ -1783,11 +1789,14 @@ test("specialize: local closed world clones and rewrites call sites", () => { assert(countOps(outer, "make_closure") === 0, "dead closure swept"); }); -test("specialize: escaping closures are rejected even when the oracle lies", () => { +test("specialize: escaping closures are never trusted, even when the oracle lies", () => { // three escapes: as a return value, into an object literal, as a call // argument. The (stub) oracle types everything {number} — a wrong - // oracle must not widen what specializes; the STRUCTURAL escape - // analysis rejects each one. + // oracle must not widen what TRUSTED-specializes; the STRUCTURAL + // escape analysis rejects each one. Since runtime-P2 the escapee + // gets the boundary wrapper instead: a guarded (trust-free) clone + // behind entry has_tag guards — a lying oracle costs speed, never + // behavior. for (const src of [ `function outer() { ${SPEC_KERNEL} var r = k(1); return k; }`, // NB: the object must stay LIVE — a dead `{ m: k }` is sunk by the @@ -1796,9 +1805,88 @@ test("specialize: escaping closures are rejected even when the oracle lies", () `function outer() { ${SPEC_KERNEL} var o = { m: k }; var r = k(1); return o; }`, `function outer(h) { ${SPEC_KERNEL} var r = h(k) + k(1); return r; }`, ]) { - const { stats } = specHarness(src, numericStubOracle(["n", "s", "i", "r"])); + const { module, stats } = specHarness(src, numericStubOracle(["n", "s", "i", "r"])); assert(stats.specialized === 0, `specialized=${stats.specialized} for ${src}`); assert(stats.rejected === 0, `rejected=${stats.rejected} for ${src}`); + assert(stats.wrapped === 1, `wrapped=${stats.wrapped} for ${src}`); + assert( + module.functions.every((f) => f.name.indexOf("$typed") === -1), + "no trusted clone" + ); + } +}); + +test("specialize: the boundary wrapper dispatches an escapee to a guarded clone", () => { + const { module, stats } = specHarness( + `function outer(h) { ${SPEC_KERNEL} var r = k(1); h(k); return r; }`, + numericStubOracle(["n", "s", "i", "r"]) + ); + assert(stats.wrapped === 1, `wrapped=${stats.wrapped}`); + assert(stats.specialized === 0, `specialized=${stats.specialized}`); + const clone = module.functions.find((f) => f.name.indexOf("$wrap") !== -1); + assert(clone !== undefined, "wrapper clone emitted"); + assert(clone!.sig !== null && clone!.sig.result === "any", "clone result stays boxed"); + assert(clone!.sig!.formals.length === 1 && clone!.sig!.formals[0] === "f64", "f64 formal"); + // trust-free payoff: the entry box_f64 proofs fold the formal-rooted + // diamonds STRUCTURALLY — raw arithmetic without consuming a single + // oracle claim as fact + assert(countOps(clone!, "f64_add") >= 1, "clone computes raw"); + assert(countOps(clone!, "has_tag") === 0, "formal-rooted guards fold"); + // the generic entry became the wrapper: guard chain, then either the + // typed fast path or the original body + const generic = module.functions.find((f) => !f.sig && f.name.indexOf(".k") !== -1); + assert(generic !== undefined, "generic k survives (it escapes)"); + const entry = generic!.entry!; + assert(entry.params.length === 3, "entry owns the calling convention"); + assert(entry.insts[0]!.op === "has_tag", "guard chain first"); + assert(entry.insts[1]!.op === "cond_br", "guard chain branches"); + assert(countOps(generic!, "call_typed") === 1, "one dispatch to the clone"); + const dispatch: Inst[] = []; + generic!.forEachInst((i) => { + if (i.op === "call_typed") dispatch.push(i); + }); + assert(dispatch[0]!.imms["fn"] === clone!.name, "dispatch targets the wrapper clone"); +}); + +test("specialize: wrapper declines — no payoff, env capture, frame ops", () => { + // a body with nothing to fold: judged (rejected), no wrapper + const noPayoff = specHarness( + `function outer(h) { function k(a) { return "x"; } var r = k(1); h(k); return r; }`, + numericStubOracle(["a", "r"]) + ); + assert(noPayoff.stats.wrapped === 0, `wrapped=${noPayoff.stats.wrapped}`); + assert(noPayoff.stats.rejected === 1, `rejected=${noPayoff.stats.rejected}`); + // an env-capturing escapee: the clone can't honor the env-free ABI + const cap = specHarness( + `function outer(h, c) { function k(n) { var s = 0; while (s < n) { s = s + c; } return s; } h(k); var r = k(1); return r; }`, + numericStubOracle(["n", "s", "c", "r"]) + ); + assert(cap.stats.wrapped === 0, `wrapped=${cap.stats.wrapped}`); + assert(cap.stats.rejected === 1, `rejected=${cap.stats.rejected}`); + // arguments-object use: statically declined, not even judged + const frame = specHarness( + `function outer(h) { function k(n) { var s = arguments.length; while (s < n) { s = s + 1; } return s; } h(k); var r = k(1); return r; }`, + numericStubOracle(["n", "s", "r"]) + ); + assert(frame.stats.wrapped === 0, `wrapped=${frame.stats.wrapped}`); + assert(frame.stats.rejected === 0, `rejected=${frame.stats.rejected}`); +}); + +test("specialize: EJS_NO_EXPORT_WRAPPER leaves the escapee fully generic", () => { + process.env["EJS_NO_EXPORT_WRAPPER"] = "1"; + try { + const { module, stats } = specHarness( + `function outer(h) { ${SPEC_KERNEL} var r = k(1); h(k); return r; }`, + numericStubOracle(["n", "s", "i", "r"]) + ); + assert(stats.wrapped === 0, `wrapped=${stats.wrapped}`); + assert(stats.specialized === 0, `specialized=${stats.specialized}`); + assert( + module.functions.every((f) => f.sig === null), + "no sig'd clones at all" + ); + } finally { + delete process.env["EJS_NO_EXPORT_WRAPPER"]; } }); diff --git a/test/types/README.md b/test/types/README.md index 07459c77..24a73c5f 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -23,11 +23,11 @@ Census as of 2026-07-22 (echojs @ 568efc7, maam @ 8d6a157): | types-literals1 | literals mixed with typed vars (incl. the unary-minus literal parse `x - -2`) | 5 | match | | types-widen1 | reassignment widening: num→str and undefined→num bindings do NOT diamond (documented; only exact {number} qualifies) | 0 | match | | types-loops1 | for/while counters, `<` in loop conditions | 6 | match | -| types-wrongoracle1 | the wrong-oracle guard: lib.js types `inc`'s param {number} from its only local call, main calls `inc("x")` cross-module → slow path, "x1" | 1 (in lib) | n/a¹ | +| types-wrongoracle1 | the wrong-oracle guard: lib.js types `inc`'s param {number} from its only local call, main calls `inc("x")` cross-module → slow path, "x1" (since runtime-P2 lib also reports `specWrapped=1` — the exported inc gets the boundary wrapper; the string still routes generic through its guard chain) | 2 (in lib) | n/a¹ | | types-bench1 | the Phase 3 microbenchmark kernel (adds/muls/divs/compares over typed locals) | 9 | match | | types-spec1 | Phase 3.6 specialization: module-local looping kernel → f64(f64) clone, exact-arity sites rewritten to call_typed (`specialized=1 specSites=2`); the extra-arg site stays generic | 6 | match | | types-spec2 | Phase 3.6 cross-function specialization (the hypot2-demo shape): hypot2 called only inside sum, prefix-safe toplevel slot stores → both clone, all four sites rewrite incl. the one inside sum$typed (`specialized=2 specSites=4`) | 7 | match | -| types-specescape1 | Phase 3.6 escape rejection: f LOOKS numeric-closed but its closure is passed as a call argument → NOT specialized (no `specialized=` in stats); the escaped call feeds a string through the generic path | 2 | match | +| types-specescape1 | Phase 3.6 escape rejection: f LOOKS numeric-closed but its closure is passed as a call argument → NOT trusted-specialized (`specialized=0`); since runtime-P2 the escapee gets the boundary wrapper instead (`specWrapped=1`), and the escaped string call fails its guard chain onto the generic path | 5 | match | Shapes probes (shapes-plan P4.3; `shapeGuards=N` from the stats line counts has_shape diamonds the way `diamonds=N` counts has_tag ones): @@ -50,6 +50,21 @@ and rationale live in shapes-plan.md's P4.6 entry): | types-accessor1 | proto-getter dispatch kernel, 20M `p.len2` reads (accessor inlining: ~7× headroom recorded, DECLINED pending proto-guard soundness machinery) | match | | types-array1 | dense-array element kernel, 20M `a[j]` reads (element shapes: 2.4× headroom vs flag-off recorded, DEFERRED — arrays are outside shaped mode) | match | +runtime-P2 probes (export-boundary wrapper + escape-taint fence, +2026-07-29; `specWrapped`/`specFenced` from the stats line count +boundary wrappers installed and call sites the taint fence kept +generic): + +| probe | shape | stats | vs node | +|---|---|---|---| +| types-wrapper1 | the exported kernel: never trusted-specialized, but wrapped — has_tag guards at the generic entry dispatch to an UNTRUSTED guarded f64 clone (folds structurally from the entry boxes). Cross-module number calls take the clone; a string and a missing arg fail the chain onto the generic body | `specWrapped=1` (in lib) | n/a¹ | +| types-wrapperfence1 | the escape-taint fence: module-private g looks closed-world numeric but one call site is hosted in the exported f; maam's constant-propagation domain prunes g's `y>5` branch under the analyzed 3, so a trusted rewrite of that site would unbox `"s"` unguarded on f(7) — the fence keeps it generic (f(7) → NaN, node-identical); the init-time site still rewrites to g$typed | `specialized=1 specSites=1 specFenced=1 specRejected=1`² (in lib) | n/a¹ | +| types-bench5 | the types-bench1 workload with the kernel EXPORTED and called cross-module: flag-off 0.34 s → 0.07 s user with the wrapper (~4.9×), PARITY with types-bench1's closed-world trusted path (0.07 s) — the module boundary costs one has_tag per formal per call | `specWrapped=1` (in lib) | n/a¹ | + +² the `specRejected` there is f's own wrapper declining on the payoff +check (its body is a bare delegation call — no diamonds to fold), not a +failure. + ¹ node cannot execute this file's bare-ESM import layout from test/; the check here is flag-off vs `--types` executables producing identical output (verified — and the slow-path routing is the probe's point). diff --git a/test/types/types-bench5.js b/test/types/types-bench5.js new file mode 100644 index 00000000..08209eae --- /dev/null +++ b/test/types/types-bench5.js @@ -0,0 +1,11 @@ +// runtime-P2 microbenchmark driver: the types-bench1 workload, but the +// kernel lives in another module and is reached through its export — +// every call crosses the module boundary into the wrapper. +import { kernel } from "./types-bench5/lib"; +var out = 0; +var r = 0; +while (r < 40) { + out = out + kernel(1000000); + r = r + 1; +} +console.log(out); diff --git a/test/types/types-bench5/lib.js b/test/types/types-bench5/lib.js new file mode 100644 index 00000000..8fd62072 --- /dev/null +++ b/test/types/types-bench5/lib.js @@ -0,0 +1,16 @@ +// runtime-P2 microbenchmark: the types-bench1 kernel, EXPORTED. The +// export pins the trusted path (the closure escapes through the +// non-promoted slot), so before runtime-P2 every cross-module call ran +// the fully generic body; the boundary wrapper recovers the typed +// kernel behind two per-call has_tag checks. +export function kernel(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + i * i - i / 2; + i = i + 1; + } + return s; +} +// module-local numeric profile for the oracle +console.log(kernel(100)); diff --git a/test/types/types-specescape1.js b/test/types/types-specescape1.js index 57386f8c..51d4deae 100644 --- a/test/types/types-specescape1.js +++ b/test/types/types-specescape1.js @@ -1,10 +1,13 @@ // Phase 3.6 probe: the wrong-oracle discipline for specialization. f // LOOKS closed-world numerically (all direct calls pass numbers), but // its closure also escapes as a call ARGUMENT — the structural escape -// analysis must reject it (specialized=0), leaving every call on the -// guarded/generic path. Behavior must be identical to flag-off; note -// via() really does call f with a string, which the generic path -// handles (numeric string concat semantics preserved). +// analysis must reject the TRUSTED clone (specialized=0). Since +// runtime-P2 the escapee gets the boundary wrapper instead +// (specWrapped=1): has_tag guards at the generic entry dispatch to a +// guarded trust-free clone, so via()'s string call fails the guard +// chain and runs the generic body. Behavior must be identical to +// flag-off; note via() really does call f with a string, which the +// generic path handles (numeric string concat semantics preserved). function f(n) { var s = 0; var i = 0; diff --git a/test/types/types-wrapper1.js b/test/types/types-wrapper1.js new file mode 100644 index 00000000..33657dc6 --- /dev/null +++ b/test/types/types-wrapper1.js @@ -0,0 +1,9 @@ +// external calls cross the module boundary into the wrapped export: +// numbers pass the has_tag chain into the guarded clone; the string and +// the missing-arg call fail it and run the original generic body. +// Output must be identical to the flag-off executable in every case. +import { kernel } from "./types-wrapper1/lib"; +console.log(kernel(10)); +console.log(kernel(20.5)); +console.log(kernel("3")); // guard fails -> generic path, coercing compare +console.log(kernel()); // missing arg is undefined -> guard fails diff --git a/test/types/types-wrapper1/lib.js b/test/types/types-wrapper1/lib.js new file mode 100644 index 00000000..b2badba7 --- /dev/null +++ b/test/types/types-wrapper1/lib.js @@ -0,0 +1,21 @@ +// runtime-P2 probe: the export-boundary wrapper. kernel is EXPORTED — +// its closure escapes through the non-promoted module slot, so it is +// never TRUSTED-specialized (external callers are outside the +// analysis, and maam's constant-propagation claims don't survive +// them) — but it still gets the boundary wrapper: a has_tag(number) +// guard per formal at the generic entry, dispatching to an UNTRUSTED +// f64 clone whose guarded body folds structurally from the entry +// boxes. specWrapped=1 in the stats line; behavior is identical to +// flag-off for every caller. +export function kernel(n) { + var s = 0; + var i = 0; + while (i < n) { + s = s + i * i - i / 2; + i = i + 1; + } + return s; +} +// a module-local call gives the oracle its numeric profile; it reaches +// the same wrapper guards through the generic entry +console.log(kernel(10)); diff --git a/test/types/types-wrapperfence1.js b/test/types/types-wrapperfence1.js new file mode 100644 index 00000000..9a48e4fc --- /dev/null +++ b/test/types/types-wrapperfence1.js @@ -0,0 +1,9 @@ +// external calls into the exported f reach the module-private g with +// values maam never analyzed. f(7) crosses g's constant-pruned branch +// (s becomes "s", so "s" * 2 must be NaN); a trusted rewrite of the +// g-site inside f would unbox the string unguarded and print garbage. +// Output must be identical to the flag-off executable. +import { f } from "./types-wrapperfence1/lib"; +console.log(f(7)); // NaN — the pruned branch, taken for real +console.log(f(2)); // 4 +console.log(f("2")); // "2" > 5 is false -> s = "2" -> "2" * 2 = 4 diff --git a/test/types/types-wrapperfence1/lib.js b/test/types/types-wrapperfence1/lib.js new file mode 100644 index 00000000..72fce5c5 --- /dev/null +++ b/test/types/types-wrapperfence1/lib.js @@ -0,0 +1,18 @@ +// runtime-P2 probe: the escape-taint fence. g is module-private and +// looks closed-world numeric — every context maam analyzed passes 3 — +// but one of its call sites is HOSTED in the exported f, whose +// activations can carry values the analysis never saw. Under the +// analyzed constant maam prunes g's y>5 branch, so a trusted clone of +// g reached from f with an external 7 would run `s * 2` unguarded on +// the string "s" — the pre-existing cross-module miscompile the fence +// closes. The init-time site (the toplevel g(3)) may still rewrite to +// the trusted clone; the site inside f stays generic (specFenced>=1). +function g(y) { + var s = y > 5 ? "s" : y; + return s * 2; +} +export function f(x) { + return g(x); +} +console.log(g(3)); // init-time: analyzed, rewritable +console.log(f(3)); // f's own call is analyzed too — but f escapes From d28e85c9061bacbe3a0c771cdc4c6b68589d897b Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 29 Jul 2026 15:47:53 -0700 Subject: [PATCH 132/146] =?UTF-8?q?eir:=20runtime-P3=20(P7.3)=20=E2=80=94?= =?UTF-8?q?=20the=20value-based=20test=20harness;=20node=20unpinned?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Baselines no longer encode any node version's inspect format: a harness-owned serializer (test/harness-console-shim.js) replaces console.log on BOTH sides — node generation runs through harness-run.js, the ejs side compiles a per-test import wrapper — so expected-outs assert on values. node 22.4.0 and 22.23.2 generate byte-identical baselines; CI floats on node 22.x. TZ=UTC pinned by the tester so Date baselines can't go machine-dependent. The years-stale-baseline un-masking flushed real bugs. Fixed: native error prototypes had null [[Prototype]] (instanceof Error false for every subtype; message now non-enumerable per spec), DataView wrongly indexed its buffer (it is not an integer-indexed exotic), typed-array RangeError message aligned with node. Pinned (xfail): Annex B.3.3 block-fundecl hoisting, toLocaleString ICU rounding, Date.prototype-is-ordinary. Un-pinned: number1, date3; esprima1 is generator:none (babel-register never could transpile the external-deps ESM — silently unregenerable before too). Tester repairs: the scheduler skipped the test at index test_threads in BOTH passes (weakmap2 had never actually run); per-test compile TMPDIRs (the shim module made concurrent compiles collide on genFreshFileName temps); baselines regenerate when the harness itself changes. Gates: stage0-3 + shapes-off 424/21/0 each, lowtier OK, test-eir = the standing 11 compiler-P1.1 pins only. docs/runtime-p3-results.md. Co-Authored-By: Claude Fable 5 --- .github/workflows/ci.yml | 13 +- docs/plans.md | 9 +- docs/runtime-p3-results.md | 141 ++++++++++ docs/runtime-plan.md | 31 +- runtime/ejs-error.c | 24 +- runtime/ejs-typedarrays.c | 146 ++-------- test/date3.js | 2 - test/esprima1.js | 5 +- test/expected/arguments6.js.expected-out | 5 + test/expected/argv1.js.expected-out | 7 +- test/expected/array21.js.expected-out | 2 +- test/expected/cfa1.js.expected-out | 0 test/expected/class-anon.js.expected-out | 1 - .../class-blockscoped.js.expected-out | 1 - .../expected/class-in-extends.js.expected-out | 1 - test/expected/date3.js.expected-out | 4 +- test/expected/eir-accessor1.js.expected-out | 4 + test/expected/eir-arrowthis1.js.expected-out | 7 + test/expected/eir-class1.js.expected-out | 6 + .../expected/eir-destructure1.js.expected-out | 10 + .../expected/eir-destructure2.js.expected-out | 10 + test/expected/eir-generator1.js.expected-out | 6 + test/expected/eir-label1.js.expected-out | 10 + test/expected/eir-loopenv1.js.expected-out | 7 + test/expected/eir-newspread1.js.expected-out | 5 + test/expected/eir-spread1.js.expected-out | 6 + test/expected/eir-tagged1.js.expected-out | 6 + test/expected/fundecl1.js.expected-out | 6 +- test/expected/gc-gennest.js.expected-out | 3 - test/expected/gc-gens1small.js.expected-out | 1 - test/expected/gc-gens2small.js.expected-out | 3 - test/expected/gc5stress1.js.expected-out | 7 + test/expected/generator12.js.expected-out | 1 - test/expected/generator22.js.expected-out | 15 + test/expected/math1.js.expected-out | 10 +- test/expected/module1.js.expected-out | 1 - test/expected/number1.js.expected-out | 2 +- test/expected/object16.js.expected-out | 2 +- test/expected/object19.js.expected-out | 4 + test/expected/object9.js.expected-out | 2 +- test/expected/regexp-flags.js.expected-out | 2 - test/expected/regexp-flags1.js.expected-out | 6 + test/expected/shapes-storm1.js.expected-out | 24 ++ test/expected/symbol-new.js.expected-out | 1 - test/expected/symbol-object.js.expected-out | 1 - .../symbol-string-convert.js.expected-out | 1 - test/expected/toLocaleString3.js.expected-out | 2 +- test/expected/tostring5.js.expected-out | 11 - test/expected/typedarray4.js.expected-out | 2 +- test/expected/typedarray5.js.expected-out | 4 +- test/expected/types-argsink1.js.expected-out | 7 + test/expected/types-flowsink1.js.expected-out | 13 + test/fundecl1.js | 2 + test/harness-console-shim.js | 264 ++++++++++++++++++ test/harness-run.js | 8 + test/number1.js | 1 - test/tester.js | 111 ++++++-- test/toLocaleString3.js | 2 + test/tostring5.js | 2 + 59 files changed, 759 insertions(+), 231 deletions(-) create mode 100644 docs/runtime-p3-results.md create mode 100644 test/expected/arguments6.js.expected-out delete mode 100644 test/expected/cfa1.js.expected-out delete mode 100644 test/expected/class-anon.js.expected-out delete mode 100644 test/expected/class-blockscoped.js.expected-out delete mode 100644 test/expected/class-in-extends.js.expected-out create mode 100644 test/expected/eir-accessor1.js.expected-out create mode 100644 test/expected/eir-arrowthis1.js.expected-out create mode 100644 test/expected/eir-class1.js.expected-out create mode 100644 test/expected/eir-destructure1.js.expected-out create mode 100644 test/expected/eir-destructure2.js.expected-out create mode 100644 test/expected/eir-generator1.js.expected-out create mode 100644 test/expected/eir-label1.js.expected-out create mode 100644 test/expected/eir-loopenv1.js.expected-out create mode 100644 test/expected/eir-newspread1.js.expected-out create mode 100644 test/expected/eir-spread1.js.expected-out create mode 100644 test/expected/eir-tagged1.js.expected-out delete mode 100644 test/expected/gc-gennest.js.expected-out delete mode 100644 test/expected/gc-gens1small.js.expected-out delete mode 100644 test/expected/gc-gens2small.js.expected-out create mode 100644 test/expected/gc5stress1.js.expected-out delete mode 100644 test/expected/generator12.js.expected-out create mode 100644 test/expected/generator22.js.expected-out delete mode 100644 test/expected/module1.js.expected-out create mode 100644 test/expected/object19.js.expected-out delete mode 100644 test/expected/regexp-flags.js.expected-out create mode 100644 test/expected/regexp-flags1.js.expected-out create mode 100644 test/expected/shapes-storm1.js.expected-out delete mode 100644 test/expected/symbol-new.js.expected-out delete mode 100644 test/expected/symbol-object.js.expected-out delete mode 100644 test/expected/symbol-string-convert.js.expected-out create mode 100644 test/expected/types-argsink1.js.expected-out create mode 100644 test/expected/types-flowsink1.js.expected-out create mode 100644 test/harness-console-shim.js create mode 100644 test/harness-run.js diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index dfeb617d..6237eae9 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -43,12 +43,13 @@ jobs: sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' buck2 --version - # pinned exactly: most test baselines are generated live by - # running `node `, and console.log's inspect format drifts - # across node releases (22.4 -> 22.23 changed array formatting) + # unpinned (runtime-P3): the value-based harness serializes logged + # values itself (test/harness-console-shim.js) on both the node and + # ejs sides, so baselines no longer depend on node's inspect format + # (verified: 22.4.0 and 22.23.2 generate byte-identical baselines) - uses: actions/setup-node@v4 with: - node-version: 22.4.0 + node-version: 22.x - name: npm ci run: npm ci @@ -117,10 +118,10 @@ jobs: sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' buck2 --version - # pinned exactly — see the macOS job's note + # unpinned (runtime-P3) — see the macOS job's note - uses: actions/setup-node@v4 with: - node-version: 22.4.0 + node-version: 22.x - name: npm ci run: npm ci diff --git a/docs/plans.md b/docs/plans.md index 7740d438..d68447c9 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -116,8 +116,13 @@ runtime-plan.md, compiler-plan.md. guarded clone — maam's constant-domain claims can't cross the boundary — plus the escape-taint fence, closing a pre-existing cross-module trusted-rewrite miscompile). -- [ ] **P7.3** value-based test harness, un-pinning node's inspect - format (runtime-P3). +- [x] **P7.3** value-based test harness, un-pinning node's inspect + format (runtime-P3). DONE 2026-07-29 — + docs/runtime-p3-results.md (harness-owned serializer on both + sides; baselines byte-identical from node 22.4.0 and 22.23.2, CI + floats on 22.x; the un-masking flushed 3 runtime bugs fixed + + 3 pinned, plus a tester scheduler bug that had silently skipped + weakmap2 forever). - [ ] **P7.4** finish the TypeScript port of the compiler; babel step becomes tsc (compiler-P2). - [ ] **P7.5** clang-style pass configuration: -O suites define the diff --git a/docs/runtime-p3-results.md b/docs/runtime-p3-results.md new file mode 100644 index 00000000..28ed725b --- /dev/null +++ b/docs/runtime-p3-results.md @@ -0,0 +1,141 @@ +# runtime-P3 results: the value-based test harness + +Phase record for runtime-P3 (plans.md P7.3). Baselines no longer encode +node's `util.inspect` format; CI's node pin is gone. + +## What the problem was + +Test baselines (`test/expected/*.expected-out`) were generated live by +running `node ` and comparing raw stdout. Anything a test logged +went through node's inspect formatting on the generation side and +through `console_toString` (a hand-rolled C imitation of some node +version's inspect) on the ejs side. Two consequences: + +- node upgrades broke the suite spuriously (22.4 → 22.23 changed array + formatting), so CI pinned node 22.4.0 exactly; +- worse, the mtime-based regeneration meant most committed baselines + were YEARS stale — generated by ancient node versions and never + refreshed — and tests "passed" only because ejs's C formatter happened + to match that ancient output. Several real semantic divergences were + hiding under that luck (below). + +## What landed + +**`test/harness-console-shim.js`** — a serializer owned by the harness, +conservative ES5, that replaces `console.log/warn/error` with functions +that format VALUES itself and hand the original console.log one final +string. The same file runs in both engines: + +- node side: `harness-run.js` (requires the shim, then the test) is the + generation driver — `node harness-run.js `, or babel-node for + the import-syntax tests; +- ejs side: tester.js compiles a generated two-line wrapper + (`import "./harness-console-shim"; import "./";`) with + `-o .exe`, deleted after each compile. `generator: none` tests + keep the legacy raw-stdout path (no shim, checked-in baseline). + +Baselines now compare equal iff the logged values agree; no engine's +inspect format is in the loop. **Cross-version proof**: all 392 +generable baselines regenerate byte-identically under node 22.4.0 and +node 22.23.2 — the exact release pair whose drift forced the pin. CI +now floats on `node-version: 22.x`. + +The serializer's format is frozen here, not in any engine: node-22.4-ish +for the common cases (`[ 1, 2 ]`, `{ a: 1 }`, quoted nested strings, +`-0`, ``, `[Function: f]`, `Map(n) { k => v }`, +`[Name: message]` for errors, UTC ISO for dates). Two ejs gaps are +deliberately absorbed inside the shim rather than exposed to every +baseline: `Object.keys(array)` omits index keys in ejs, and +`Date.prototype.toISOString` is missing (ISO computed from `getTime()` +with civil-date math). `TZ=UTC` is pinned by tester.js for both +generation and runs so local-time Date construction (date3.js) can't +make a baseline machine-dependent. + +## Harness bugs fixed along the way + +- **tester scheduler skipped a test**: the old `processTests` seeded + `i = test_threads` but incremented `i` before reading `tests[i]` in + the callback — the test at index `test_threads` (here: weakmap2.js) + silently ran in NEITHER the generation nor the run pass, forever + green on a stale baseline. Rewritten; weakmap2 runs and passes. + (The `-t` path's "workaround for a bug" thread-count clamp was this.) +- **concurrent compiles clobbered temps**: every test compile now + includes the shim module, and the compiler's temp names + (`genFreshFileName`) are only unique within one process — 4-way + concurrent compiles raced on `harness-console-shim.js.N-*.bc` (113 + spurious compile failures on the first full run). tester.js gives + each compile its own TMPDIR (the types-diff lane's per-worker + discipline); `os.tmpdir()` honors TMPDIR in both node and the + ejs-compiled compilers. +- **harness staleness**: expected-outs regenerate when the shim or + run driver is newer, not just the test. + +## Runtime bugs the un-masking flushed (fixed) + +- **native error prototypes had null [[Prototype]]** + (`runtime/ejs-error.c`): `Error.prototype` now chains to + `Object.prototype` and the six NativeError prototypes to + `Error.prototype` (ES2015 19.5.6.3) — `e instanceof Error` was false + for every subtype instance. `message` is now defined non-enumerable + (the spec step was quoted in a comment directly above the enumerable + `setprop` it contradicted), so `Object.keys(err)` is `[]` as in node. +- **DataView indexed the buffer** (`runtime/ejs-typedarrays.c`): + DataView is not an integer-indexed exotic object; `view[i]` is an + ordinary property. The five custom specops are gone (typedarray5). +- **typed-array RangeError message** aligned with node: + `Invalid typed array length: N` (typedarray4). + +## Real divergences pinned (xfail), for a later burn-down + +- **fundecl1.js** — block-level function declarations hoist with + pre-ES6 web semantics (last decl wins at function entry); ES2015 + Annex B.3.3 gives whu/hi/whu/bye. +- **toLocaleString3.js** — `Number.prototype.toLocaleString` lacks + ICU's default maximumFractionDigits=3 rounding (node 1.236 vs ejs + 1.2355). +- **tostring5.js** — `Date.prototype` is an ordinary object in ES2015+ + (node throws on `Date.prototype.toString()`); ejs still gives it a + [[DateValue]]. + +All three "passed" before against ancient baselines. + +## Un-pinned by the value harness + +- **number1.js** (xfail removed) — the disagreement was purely about + how engines inspect `new Number(5)`; the shim prints `[Number: 5]` + on both sides. +- **date3.js** (xfail removed) — the off-by-an-hour was in ejs's date + STRING formatting, which the shim no longer consults; the epoch + values agree with node (under TZ=UTC and, at least currently, PDT). +- **esprima1.js** → `generator: none`: babel-node cannot transpile the + external-deps esprima-es6 ESM under babel-register (this was silently + broken under the old harness too — its baseline was unregenerable). + The output is `JSON.stringify` of the AST, engine-neutral; the + checked-in baseline equals ejs's (and esprima-under-ejs's) output. + +## Baseline churn (the whole point: it's small) + +Only 12 baselines changed content, and each is an ancient-node zombie +flushed: sparse arrays (`, , ,` → `<4 empty items>`, array21), V8 math +precision improvements ejs's libm already matched (math1), function +name rendering (object9/16), plus the tests named above. 19 baselines +are newly committed (tests that had none and regenerated in CI each +run, eir-*/types-* among them); 13 deleted were orphans or baselines of +non-globbed `-t`-only tests, which regenerate on demand. + +## Gates + +- stage0/1/2/3 suites: 424 pass / 21 xfail / 0 fail each + (453 globbed = 424 + 21 + 8 skip-if-at-runtime) +- test-stage1-shapes-off: 424 / 21 / 0 +- test-eir-lowtier: OK +- test-eir: the standing 11 compiler-P1.1 pins only, no new reds +- cross-version: baselines byte-identical from node 22.4.0 and 22.23.2 + +## Notes / follow-ons + +- `Object.keys` on arrays omitting index keys is a real ejs spec gap + (worked around in the shim); candidate for a future pinned-bug round. +- babel-node remains the generator for import-syntax tests; P7.4's tsc + move is the eventual owner of that dependency. +- The 11 test-eir reds are compiler-P1.1's, tracked there. diff --git a/docs/runtime-plan.md b/docs/runtime-plan.md index 313033ba..a27001f6 100644 --- a/docs/runtime-plan.md +++ b/docs/runtime-plan.md @@ -67,11 +67,34 @@ performance bucket owns. wrappers/guarded dispatch for tainted-called internal helpers, and a payoff gate that credits call-heavy bodies (a bare delegation export currently declines). -- [ ] **runtime-P3 — Value-based test harness.** Test baselines are - generated live by `node ` and are sensitive to node's +- [x] **runtime-P3 — Value-based test harness.** Test baselines were + generated live by `node ` and were sensitive to node's console.log inspect-format drift (22.4 → 22.23 changed array - formatting); CI pins node 22.4.0. The durable fix asserts on - values rather than inspect output. + formatting); CI pinned node 22.4.0. DONE 2026-07-29 — + docs/runtime-p3-results.md. What landed: + - `test/harness-console-shim.js`: a harness-owned value + serializer replaces console.log on BOTH sides (node generation + via harness-run.js, ejs via a compiled import wrapper), so + baselines assert on values; node 22.4.0 and 22.23.2 generate + byte-identical baselines and CI floats on `22.x`. TZ=UTC + pinned by the tester. + - the stale-baseline un-masking flushed real bugs: FIXED — + native error prototypes had null [[Prototype]] (instanceof + Error was false for subtypes; message now non-enumerable), + DataView wrongly indexed its buffer, typed-array RangeError + message aligned with node. PINNED (xfail) — Annex B.3.3 + block fundecl hoisting (fundecl1), toLocaleString ICU + rounding (toLocaleString3), Date.prototype-is-ordinary + (tostring5). UN-PINNED — number1, date3; esprima1 is + `generator: none` (babel-register never could transpile the + external-deps ESM). + - tester fixes: the scheduler silently skipped the test at index + test_threads in both passes (weakmap2 had never actually run); + per-test compile TMPDIRs (shim module made concurrent compiler + temp names collide); baselines regenerate when the harness + itself changes. + - gates: stage0-3 + shapes-off all 424/21/0, lowtier OK, + test-eir = the 11 standing compiler-P1.1 pins only. - [x] **runtime-P4 — Collector structural refactor.** Recorded during the gc-P2 debugging sessions, deliberately deferred while phases were landing: extract a cell-lifecycle module (alloc/free/color diff --git a/runtime/ejs-error.c b/runtime/ejs-error.c index ad8d42ae..ae2e5d64 100644 --- a/runtime/ejs-error.c +++ b/runtime/ejs-error.c @@ -59,7 +59,8 @@ ejsval _ejs_URIError_prototype EJSVAL_ALIGNMENT; /* b. Let msgDesc be the PropertyDescriptor{[[Value]]: msg, [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true}. */ \ /* c. Let status be DefinePropertyOrThrow(O, "message", msgDesc). */ \ /* d. Assert: status is not an abrupt completion. */ \ - _ejs_object_setprop (*_this, _ejs_atom_message, ToString(args[0])); \ + _ejs_object_define_value_property (*_this, _ejs_atom_message, msg, \ + EJS_PROP_NOT_ENUMERABLE | EJS_PROP_CONFIGURABLE | EJS_PROP_WRITABLE); \ } \ /* 5. Return O. */ \ return O; \ @@ -138,10 +139,13 @@ _ejs_error_init(ejsval global) ejsval toString = _ejs_function_new_native (_ejs_null, _ejs_atom_toString, _ejs_Error_prototype_toString); _ejs_gc_add_root (&toString); -#define EJS_ADD_NATIVE_ERROR_TYPE(err) EJS_MACRO_START \ +// proto_proto: Error.prototype chains to Object.prototype, the +// NativeError prototypes chain to Error.prototype (ES2015 19.5.6.3) — +// `e instanceof Error` must hold for every native error +#define EJS_ADD_NATIVE_ERROR_TYPE(err, proto_proto) EJS_MACRO_START \ _ejs_##err = _ejs_function_new_without_proto (_ejs_null, _ejs_atom_##err, _ejs_##err##_impl); \ _ejs_object_setprop (global, _ejs_atom_##err, _ejs_##err); \ - _ejs_##err##_prototype = _ejs_object_new(_ejs_null, &_ejs_Object_specops); \ + _ejs_##err##_prototype = _ejs_object_new(proto_proto, &_ejs_Object_specops); \ _ejs_object_setprop (_ejs_##err, _ejs_atom_prototype, _ejs_##err##_prototype); \ _ejs_object_define_value_property (_ejs_##err##_prototype, _ejs_atom_constructor, _ejs_##err,\ EJS_PROP_NOT_ENUMERABLE | EJS_PROP_CONFIGURABLE | EJS_PROP_WRITABLE); \ @@ -150,13 +154,13 @@ _ejs_error_init(ejsval global) _ejs_object_setprop (_ejs_##err##_prototype, _ejs_atom_toString, toString); \ EJS_MACRO_END - EJS_ADD_NATIVE_ERROR_TYPE(Error); - EJS_ADD_NATIVE_ERROR_TYPE(EvalError); - EJS_ADD_NATIVE_ERROR_TYPE(RangeError); - EJS_ADD_NATIVE_ERROR_TYPE(ReferenceError); - EJS_ADD_NATIVE_ERROR_TYPE(SyntaxError); - EJS_ADD_NATIVE_ERROR_TYPE(TypeError); - EJS_ADD_NATIVE_ERROR_TYPE(URIError); + EJS_ADD_NATIVE_ERROR_TYPE(Error, _ejs_Object_prototype); + EJS_ADD_NATIVE_ERROR_TYPE(EvalError, _ejs_Error_prototype); + EJS_ADD_NATIVE_ERROR_TYPE(RangeError, _ejs_Error_prototype); + EJS_ADD_NATIVE_ERROR_TYPE(ReferenceError, _ejs_Error_prototype); + EJS_ADD_NATIVE_ERROR_TYPE(SyntaxError, _ejs_Error_prototype); + EJS_ADD_NATIVE_ERROR_TYPE(TypeError, _ejs_Error_prototype); + EJS_ADD_NATIVE_ERROR_TYPE(URIError, _ejs_Error_prototype); _ejs_gc_remove_root (&toString); } diff --git a/runtime/ejs-typedarrays.c b/runtime/ejs-typedarrays.c index 13106af3..f32c03c6 100644 --- a/runtime/ejs-typedarrays.c +++ b/runtime/ejs-typedarrays.c @@ -413,18 +413,23 @@ EJS_DATA_VIEW_METHOD_IMPL(Float64, double, 8); /* TypedArray(ArrayBuffer buffer, unsigned long byteOffset, unsigned long length) */ \ uint32_t byteOffset = 0; \ uint32_t byteLength = buffer->size; \ + uint32_t requestedLength = 0; \ EJSBool lengthSpecified = EJS_FALSE; \ \ if (argc > 1) byteOffset = ToUint32(args[1]); \ if (argc > 2) { \ - byteLength = ToUint32(args[2]) * elementSizeInBytes; \ + requestedLength = ToUint32(args[2]); \ + byteLength = requestedLength * elementSizeInBytes; \ lengthSpecified = EJS_TRUE; \ } \ \ if (byteOffset > buffer->size) byteOffset = buffer->size; \ if (byteOffset + byteLength > buffer->size) { \ - if (lengthSpecified) \ - _ejs_throw_nativeerror_utf8 (EJS_RANGE_ERROR, "Length is out of range."); \ + if (lengthSpecified) { \ + char rangemsg[64]; \ + snprintf (rangemsg, sizeof(rangemsg), "Invalid typed array length: %u", requestedLength); \ + _ejs_throw_nativeerror_utf8 (EJS_RANGE_ERROR, rangemsg); \ + } \ else \ byteLength = buffer->size - byteOffset; \ } \ @@ -2533,124 +2538,6 @@ _ejs_typedarray_specop_scan (EJSObject* obj, EJSValueFunc scan_func) _ejs_Object_specops.Scan (obj, scan_func); } -static ejsval -_ejs_dataview_specop_get (ejsval obj, ejsval propertyName, ejsval receiver) -{ - // check if propertyName is an integer, or a string that we can convert to an int - EJSBool is_index = EJS_FALSE; - int idx = 0; - if (EJSVAL_IS_NUMBER(propertyName)) { - double n = EJSVAL_TO_NUMBER(propertyName); - if (floor(n) == n) { - idx = (int)n; - is_index = EJS_TRUE; - } - } - - // Index for DataView is byte-based. - if (is_index) { - if (idx < 0 || idx > EJS_DATA_VIEW_BYTE_LEN(obj)) - return _ejs_undefined; - - void *data = _ejs_dataview_get_data (EJSVAL_TO_OBJECT(obj)); - return NUMBER_TO_EJSVAL ((double)((unsigned char*)data)[idx]); - } - - // otherwise we fallback to the object implementation - return _ejs_Object_specops.Get (obj, propertyName, receiver); -} - -static EJSPropertyDesc* -_ejs_dataview_specop_get_own_property (ejsval obj, ejsval propertyName, ejsval* exc) -{ - if (EJSVAL_IS_NUMBER(propertyName)) { - double needle = EJSVAL_TO_NUMBER(propertyName); - int needle_int; - if (EJSDOUBLE_IS_INT32(needle, &needle_int)) { - if (needle_int >= 0 && needle_int < EJS_DATA_VIEW_BYTE_LEN(obj)) - return NULL; // XXX - } - } - - return _ejs_Object_specops.GetOwnProperty (obj, propertyName, exc); -} - -static EJSBool -_ejs_dataview_specop_set (ejsval obj, ejsval propertyName, ejsval val, ejsval receiver) -{ - EJSBool is_index = EJS_FALSE; - ejsval idx_val; - int idx; - - if (!EJSVAL_IS_SYMBOL(propertyName)) { - idx_val = ToNumber(propertyName); - if (EJSVAL_IS_NUMBER(idx_val)) { - double n = EJSVAL_TO_NUMBER(idx_val); - if (floor(n) == n) { - idx = (int)n; - is_index = EJS_TRUE; - } - } - } - - if (is_index) { - if (idx < 0 || idx >= EJS_DATA_VIEW_BYTE_LEN(obj)) - return EJS_FALSE; - - void* data = _ejs_dataview_get_data (EJSVAL_TO_OBJECT(obj)); - ((unsigned char*)data)[idx] = (unsigned char)EJSVAL_TO_NUMBER(val); - - return EJS_TRUE; - } - - return _ejs_Object_specops.Set (obj, propertyName, val, receiver); -} - -static EJSBool -_ejs_dataview_specop_has_property (ejsval obj, ejsval propertyName) -{ - // check if propertyName is a uint32, or a string that we can convert to an uint32 - int idx = -1; - if (EJSVAL_IS_NUMBER(propertyName)) { - double n = EJSVAL_TO_NUMBER(propertyName); - if (floor(n) == n) { - idx = (int)n; - - return idx > 0 && idx < EJS_DATA_VIEW_BYTE_LEN(obj); - } - } - - return _ejs_Object_specops.HasProperty (obj, propertyName); -} - -static EJSBool -_ejs_dataview_specop_delete (ejsval obj, ejsval propertyName, EJSBool flag) -{ - int idx = -1; - if (EJSVAL_IS_NUMBER(propertyName)) { - double n = EJSVAL_TO_NUMBER(propertyName); - if (floor(n) == n) { - idx = (int)n; - } - } - - if (idx == -1) - return _ejs_Object_specops.Delete (obj, propertyName, flag); - - if (idx < EJS_DATA_VIEW_BYTE_LEN(obj)) { - //void* data = _ejs_dataview_get_data (EJSVAL_TO_OBJECT(obj)); - //((unsigned char*)data)[idx] = _ejs_undefined; - } - - return EJS_FALSE; -} - -static EJSBool -_ejs_dataview_specop_define_own_property (ejsval obj, ejsval propertyName, EJSPropertyDesc* propertyDescriptor, EJSBool flag) -{ - return _ejs_Object_specops.DefineOwnProperty (obj, propertyName, propertyDescriptor, flag); -} - static EJSObject* _ejs_dataview_specop_allocate () { @@ -2665,17 +2552,22 @@ _ejs_dataview_specop_scan (EJSObject* obj, EJSValueFunc scan_func) _ejs_Object_specops.Scan (obj, scan_func); } +// DataView is NOT an integer-indexed exotic object (unlike the +// TypedArrays): view[i] is an ordinary property, byte access goes +// through get/setUint8 etc. ejs used to route indexes at the +// underlying buffer here, which typedarray5 caught once the harness +// went value-based (runtime-P3). EJS_DEFINE_CLASS(DataView, OP_INHERIT, // [[GetPrototypeOf]] OP_INHERIT, // [[SetPrototypeOf]] OP_INHERIT, // [[IsExtensible]] OP_INHERIT, // [[PreventExtensions]] - _ejs_dataview_specop_get_own_property, - _ejs_dataview_specop_define_own_property, - _ejs_dataview_specop_has_property, - _ejs_dataview_specop_get, - _ejs_dataview_specop_set, - _ejs_dataview_specop_delete, + OP_INHERIT, // [[GetOwnProperty]] + OP_INHERIT, // [[DefineOwnProperty]] + OP_INHERIT, // [[HasProperty]] + OP_INHERIT, // [[Get]] + OP_INHERIT, // [[Set]] + OP_INHERIT, // [[Delete]] OP_INHERIT, // [[Enumerate]] OP_INHERIT, // [[OwnPropertyKeys]] OP_INHERIT, // [[Call]] diff --git a/test/date3.js b/test/date3.js index 3d4e07be..44deeb98 100644 --- a/test/date3.js +++ b/test/date3.js @@ -1,4 +1,2 @@ -// xfail: the first date is off by an hour. timegm/localtime_r screwup? - console.log(new Date(2000, 8)); console.log(new Date(2000, 0)); diff --git a/test/esprima1.js b/test/esprima1.js index 8bafe083..7edbcf77 100644 --- a/test/esprima1.js +++ b/test/esprima1.js @@ -1,4 +1,7 @@ -// generator: babel-node +// generator: none +// baseline checked in: babel-node can't run the external-deps esprima-es6 +// ESM under babel-register (was silently unregenerable under the old +// harness too); the output is JSON.stringify of the AST, engine-neutral // revisit the esprima tests now that we have the es6 modules import * as esprima from "../external-deps/esprima/esprima-es6"; diff --git a/test/expected/arguments6.js.expected-out b/test/expected/arguments6.js.expected-out new file mode 100644 index 00000000..e3bff4d6 --- /dev/null +++ b/test/expected/arguments6.js.expected-out @@ -0,0 +1,5 @@ +1,2,3 +9 +42 true +function +5,, diff --git a/test/expected/argv1.js.expected-out b/test/expected/argv1.js.expected-out index 7cd18e26..7863639e 100644 --- a/test/expected/argv1.js.expected-out +++ b/test/expected/argv1.js.expected-out @@ -1,3 +1,4 @@ -length = 2 -argv[0] = node -argv[1] = /Users/toshok/src/coffeekit/echo-js/test/argv1.js +length = 3 +argv[0] = /Users/toshok/.local/share/mise/installs/node/22.4.0/bin/node +argv[1] = /private/tmp/claude-501/-Users-toshok-src-echojs-echojs/da67aa89-c001-4316-943b-80ac66784ae0/scratchpad/p73-tree/test/harness-run.js +argv[2] = argv1.js diff --git a/test/expected/array21.js.expected-out b/test/expected/array21.js.expected-out index 765e7910..77a6562a 100644 --- a/test/expected/array21.js.expected-out +++ b/test/expected/array21.js.expected-out @@ -1,2 +1,2 @@ -[ 1, 2, 3, 4, 5, , , , , 6 ] +[ 1, 2, 3, 4, 5, <4 empty items>, 6 ] 10 diff --git a/test/expected/cfa1.js.expected-out b/test/expected/cfa1.js.expected-out deleted file mode 100644 index e69de29b..00000000 diff --git a/test/expected/class-anon.js.expected-out b/test/expected/class-anon.js.expected-out deleted file mode 100644 index e50a49f9..00000000 --- a/test/expected/class-anon.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -bar! diff --git a/test/expected/class-blockscoped.js.expected-out b/test/expected/class-blockscoped.js.expected-out deleted file mode 100644 index 27ba77dd..00000000 --- a/test/expected/class-blockscoped.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -true diff --git a/test/expected/class-in-extends.js.expected-out b/test/expected/class-in-extends.js.expected-out deleted file mode 100644 index 27ba77dd..00000000 --- a/test/expected/class-in-extends.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -true diff --git a/test/expected/date3.js.expected-out b/test/expected/date3.js.expected-out index b66115db..0e1c6b73 100644 --- a/test/expected/date3.js.expected-out +++ b/test/expected/date3.js.expected-out @@ -1,2 +1,2 @@ -Fri Sep 01 2000 00:00:00 GMT-0700 (PDT) -Sat Jan 01 2000 00:00:00 GMT-0800 (PST) +2000-09-01T00:00:00.000Z +2000-01-01T00:00:00.000Z diff --git a/test/expected/eir-accessor1.js.expected-out b/test/expected/eir-accessor1.js.expected-out new file mode 100644 index 00000000..c4de67db --- /dev/null +++ b/test/expected/eir-accessor1.js.expected-out @@ -0,0 +1,4 @@ +t:50,50 +0,1,2 +a,b/undefined +11,110,2,3 diff --git a/test/expected/eir-arrowthis1.js.expected-out b/test/expected/eir-arrowthis1.js.expected-out new file mode 100644 index 00000000..6b8165b5 --- /dev/null +++ b/test/expected/eir-arrowthis1.js.expected-out @@ -0,0 +1,7 @@ +T:a,T:b +10 +p:B2 +owner +0,1,2 +42 +outer/K diff --git a/test/expected/eir-class1.js.expected-out b/test/expected/eir-class1.js.expected-out new file mode 100644 index 00000000..a184a94b --- /dev/null +++ b/test/expected/eir-class1.js.expected-out @@ -0,0 +1,6 @@ +7/P! +B[A(11),z] truetrue +hi A +10,50 +kk +6 diff --git a/test/expected/eir-destructure1.js.expected-out b/test/expected/eir-destructure1.js.expected-out new file mode 100644 index 00000000..a86b81a9 --- /dev/null +++ b/test/expected/eir-destructure1.js.expected-out @@ -0,0 +1,10 @@ +1,2 +Y,Z +p,q +1/2+3+4 +10,99,30,44 +1,2 +7,2 +6 +A,B/B,A +r,l diff --git a/test/expected/eir-destructure2.js.expected-out b/test/expected/eir-destructure2.js.expected-out new file mode 100644 index 00000000..31d57f70 --- /dev/null +++ b/test/expected/eir-destructure2.js.expected-out @@ -0,0 +1,10 @@ +14 +a:1,b:2 +3,34 +x-y-z|z +q,r +2,5 +boom/42 +no throw +1 2 5 6 +10 diff --git a/test/expected/eir-generator1.js.expected-out b/test/expected/eir-generator1.js.expected-out new file mode 100644 index 00000000..fb6fecb8 --- /dev/null +++ b/test/expected/eir-generator1.js.expected-out @@ -0,0 +1,6 @@ +1,2,3 +0,10,20,30 +a,b,c,d +first/got:one/got2:two +true,undefined +0,1,2 diff --git a/test/expected/eir-label1.js.expected-out b/test/expected/eir-label1.js.expected-out new file mode 100644 index 00000000..71384466 --- /dev/null +++ b/test/expected/eir-label1.js.expected-out @@ -0,0 +1,10 @@ +1,1 +none +00,10,11,20,21,22 +a,c +a,b,c +v7,f0,f1 +0:0,f00,0:1,f01,f10,2:0,f20,2:1,f21 +one,after +two,after +4 diff --git a/test/expected/eir-loopenv1.js.expected-out b/test/expected/eir-loopenv1.js.expected-out new file mode 100644 index 00000000..d2efd4e5 --- /dev/null +++ b/test/expected/eir-loopenv1.js.expected-out @@ -0,0 +1,7 @@ +0,1,2 +a,b,c +p,q +u,v +m:00 m:01 m:10 m:11 +5,7 +10,11,12/10,11,12 diff --git a/test/expected/eir-newspread1.js.expected-out b/test/expected/eir-newspread1.js.expected-out new file mode 100644 index 00000000..bdb598a8 --- /dev/null +++ b/test/expected/eir-newspread1.js.expected-out @@ -0,0 +1,5 @@ +6/3 +31/3 +24/3 +a-b-end +true diff --git a/test/expected/eir-spread1.js.expected-out b/test/expected/eir-spread1.js.expected-out new file mode 100644 index 00000000..95c58b38 --- /dev/null +++ b/test/expected/eir-spread1.js.expected-out @@ -0,0 +1,6 @@ +1,2,3 +0 1 2 9 3 +b:x:y +7,8,1+2+3 +456 +t,u,v diff --git a/test/expected/eir-tagged1.js.expected-out b/test/expected/eir-tagged1.js.expected-out new file mode 100644 index 00000000..10961efa --- /dev/null +++ b/test/expected/eir-tagged1.js.expected-out @@ -0,0 +1,6 @@ +a | b | c/a | b | c/5,10 +true +>>lead 9 +x +|/x\n|/1 +only literal/only literal/ diff --git a/test/expected/fundecl1.js.expected-out b/test/expected/fundecl1.js.expected-out index 58e07931..91156538 100644 --- a/test/expected/fundecl1.js.expected-out +++ b/test/expected/fundecl1.js.expected-out @@ -1,6 +1,6 @@ -bye -bye -bye +whu +hi +whu bye whu hi diff --git a/test/expected/gc-gennest.js.expected-out b/test/expected/gc-gennest.js.expected-out deleted file mode 100644 index 83bc2e06..00000000 --- a/test/expected/gc-gennest.js.expected-out +++ /dev/null @@ -1,3 +0,0 @@ -30 -in3 -10 diff --git a/test/expected/gc-gens1small.js.expected-out b/test/expected/gc-gens1small.js.expected-out deleted file mode 100644 index b0918d9b..00000000 --- a/test/expected/gc-gens1small.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -0,1000,2000,3000,78000 diff --git a/test/expected/gc-gens2small.js.expected-out b/test/expected/gc-gens2small.js.expected-out deleted file mode 100644 index eb60c3fd..00000000 --- a/test/expected/gc-gens2small.js.expected-out +++ /dev/null @@ -1,3 +0,0 @@ -0 -12348 -before diff --git a/test/expected/gc5stress1.js.expected-out b/test/expected/gc5stress1.js.expected-out new file mode 100644 index 00000000..528485d6 --- /dev/null +++ b/test/expected/gc5stress1.js.expected-out @@ -0,0 +1,7 @@ +s1 3999000 +s2 749375 b123 e321 +s3 4912325 +s4 112350 r100 p,r p,q,r +s5 now-a-string0|0;1|x1;2|x2;now-a-string3|21;4|x4; +s6 one/two/three true false +s7 120200 diff --git a/test/expected/generator12.js.expected-out b/test/expected/generator12.js.expected-out deleted file mode 100644 index d00491fd..00000000 --- a/test/expected/generator12.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -1 diff --git a/test/expected/generator22.js.expected-out b/test/expected/generator22.js.expected-out new file mode 100644 index 00000000..3e1c8d9f --- /dev/null +++ b/test/expected/generator22.js.expected-out @@ -0,0 +1,15 @@ +{"value":1,"done":false} +fin +{"value":5,"done":true} +{"done":true} +{"value":1,"done":false} +{"value":42,"done":true} +{"done":true} +{"value":9,"done":true} +{"done":true} +{"value":1,"done":false} +caught x +kfin +after +{"done":true} +caller caught early diff --git a/test/expected/math1.js.expected-out b/test/expected/math1.js.expected-out index 9283a0c3..77fa2825 100644 --- a/test/expected/math1.js.expected-out +++ b/test/expected/math1.js.expected-out @@ -7,14 +7,14 @@ NaN 10 -1 -1 -0 +-0 0 1 1 NaN -Infinity 1 -2.9999999999999996 +3 Infinity NaN NaN @@ -42,18 +42,18 @@ NaN NaN 0 1.3169578969248166 -0.8813735870195429 +0.881373587019543 0 NaN -Infinity 0 -0.5493061443340549 +0.5493061443340548 Infinity NaN 13 42 0 -0 +-0 -1 NaN NaN diff --git a/test/expected/module1.js.expected-out b/test/expected/module1.js.expected-out deleted file mode 100644 index 3b18e512..00000000 --- a/test/expected/module1.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -hello world diff --git a/test/expected/number1.js.expected-out b/test/expected/number1.js.expected-out index 2c38d2fc..3726f983 100644 --- a/test/expected/number1.js.expected-out +++ b/test/expected/number1.js.expected-out @@ -1,3 +1,3 @@ 5 -{} +[Number: 5] 5 diff --git a/test/expected/object16.js.expected-out b/test/expected/object16.js.expected-out index ab3ea30f..16b607fc 100644 --- a/test/expected/object16.js.expected-out +++ b/test/expected/object16.js.expected-out @@ -3,6 +3,6 @@ 2 3 4 -[Function] +[Function (anonymous)] hi undefined diff --git a/test/expected/object19.js.expected-out b/test/expected/object19.js.expected-out new file mode 100644 index 00000000..e7c89bf9 --- /dev/null +++ b/test/expected/object19.js.expected-out @@ -0,0 +1,4 @@ +1 9 +1 undefined +2 function +4 3 diff --git a/test/expected/object9.js.expected-out b/test/expected/object9.js.expected-out index 682f20c5..1a28fd8f 100644 --- a/test/expected/object9.js.expected-out +++ b/test/expected/object9.js.expected-out @@ -1,4 +1,4 @@ -[Function] +[Function: get] undefined false undefined diff --git a/test/expected/regexp-flags.js.expected-out b/test/expected/regexp-flags.js.expected-out deleted file mode 100644 index 30b4824f..00000000 --- a/test/expected/regexp-flags.js.expected-out +++ /dev/null @@ -1,2 +0,0 @@ -gim - diff --git a/test/expected/regexp-flags1.js.expected-out b/test/expected/regexp-flags1.js.expected-out new file mode 100644 index 00000000..9fd6b5d5 --- /dev/null +++ b/test/expected/regexp-flags1.js.expected-out @@ -0,0 +1,6 @@ +xxx +true +a +B +AbC +true diff --git a/test/expected/shapes-storm1.js.expected-out b/test/expected/shapes-storm1.js.expected-out new file mode 100644 index 00000000..fdd48288 --- /dev/null +++ b/test/expected/shapes-storm1.js.expected-out @@ -0,0 +1,24 @@ +sum 22990 +del keys x,z +del keys2 x,z,y,w 42 true false +attr keys p,q 3 +attr names p,q +dp 7 8 k,m +acc 42 base,twice +desc 4.25 true true true true +idx zero x true 0,name,after +froz 1 undefined true false +seal 2 true +pe 2 undefined false +forin own1,own2,inherited +hasOwn true false true +assign {"t":0,"u":1,"v":"two"} +assign2 {"r":2,"s":3} +defprops 1 2 one,two +sym hidden visible,visible2 1 +wide 780 40 0 39 +churn 60 flip0 flip7 59 +json {"a":1,"b":[1,2,3],"c":{"d":"e"},"f":4} +pts 14850 +upd replaced z +pie true false [object Object] diff --git a/test/expected/symbol-new.js.expected-out b/test/expected/symbol-new.js.expected-out deleted file mode 100644 index d5e07596..00000000 --- a/test/expected/symbol-new.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -succeed diff --git a/test/expected/symbol-object.js.expected-out b/test/expected/symbol-object.js.expected-out deleted file mode 100644 index 27ba77dd..00000000 --- a/test/expected/symbol-object.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -true diff --git a/test/expected/symbol-string-convert.js.expected-out b/test/expected/symbol-string-convert.js.expected-out deleted file mode 100644 index 27ba77dd..00000000 --- a/test/expected/symbol-string-convert.js.expected-out +++ /dev/null @@ -1 +0,0 @@ -true diff --git a/test/expected/toLocaleString3.js.expected-out b/test/expected/toLocaleString3.js.expected-out index 0449af53..ecd019f1 100644 --- a/test/expected/toLocaleString3.js.expected-out +++ b/test/expected/toLocaleString3.js.expected-out @@ -1 +1 @@ -1.2355,1.2,hi there,[object Object] +1.236,1.2,hi there,[object Object] diff --git a/test/expected/tostring5.js.expected-out b/test/expected/tostring5.js.expected-out index ee5705f5..60fffd18 100644 --- a/test/expected/tostring5.js.expected-out +++ b/test/expected/tostring5.js.expected-out @@ -1,12 +1 @@ date -Invalid Date -object date.proto.tostring -[TypeError: this is not a Date object.] -number -0 -string - -boolean -false -regexp -/(?:)/ diff --git a/test/expected/typedarray4.js.expected-out b/test/expected/typedarray4.js.expected-out index 86766d6e..98ac48e6 100644 --- a/test/expected/typedarray4.js.expected-out +++ b/test/expected/typedarray4.js.expected-out @@ -15,4 +15,4 @@ Int32Array (4, 2): byteOffset: 4 byteLength: 8 length: 2 -[RangeError: Length is out of range.] +[RangeError: Invalid typed array length: 4] diff --git a/test/expected/typedarray5.js.expected-out b/test/expected/typedarray5.js.expected-out index d19b0d1b..3d8f4443 100644 --- a/test/expected/typedarray5.js.expected-out +++ b/test/expected/typedarray5.js.expected-out @@ -12,5 +12,5 @@ byte offset: 0 byte length: 4 1 3 -111 -113 +5 +7 diff --git a/test/expected/types-argsink1.js.expected-out b/test/expected/types-argsink1.js.expected-out new file mode 100644 index 00000000..a0a8561a --- /dev/null +++ b/test/expected/types-argsink1.js.expected-out @@ -0,0 +1,7 @@ +0 1 0 3 0 3 +0 1 3 +0:undefined 1:x +1,2,3 +0: 2:1|2 +3 +2 7 diff --git a/test/expected/types-flowsink1.js.expected-out b/test/expected/types-flowsink1.js.expected-out new file mode 100644 index 00000000..03fcc536 --- /dev/null +++ b/test/expected/types-flowsink1.js.expected-out @@ -0,0 +1,13 @@ +1 +2 +0:0 +45:10 +5,9 +true:42:2 +77 +1 2 false +0,1,2,3:false +1:3 +8 +true +42 diff --git a/test/fundecl1.js b/test/fundecl1.js index a655036c..f387c985 100644 --- a/test/fundecl1.js +++ b/test/fundecl1.js @@ -1,3 +1,5 @@ +// xfail: block-level function declarations hoist with pre-ES6 web semantics (last decl wins at function entry); ES2015 Annex B.3.3 gives whu/hi/whu/bye. stale-baseline zombie flushed by runtime-P3 + /* if (typeof(console) === "undefined") { var console = { diff --git a/test/harness-console-shim.js b/test/harness-console-shim.js new file mode 100644 index 00000000..6620ab72 --- /dev/null +++ b/test/harness-console-shim.js @@ -0,0 +1,264 @@ +// harness-console-shim: the value-based test harness (runtime-P3). +// +// Replaces console.log/warn/error with a serializer OWNED BY THIS FILE. +// The same code runs under node (expected-output generation, via +// harness-run.js) and compiled into each test executable (via the import +// wrapper tester.js generates), so a test's baseline and its output agree +// iff the VALUES it logged agree — no engine's inspect format is in the +// loop, and node upgrades can't drift the baselines. +// +// Rules for editing this file: +// - conservative ES5 only: it must compile under ejs and run under +// node AND babel-node byte-identically; +// - no engine-provided formatting (util.inspect, toISOString, ...); +// anything observable must be computed here, from values; +// - it must not rely on ejs-specific or node-specific behavior: any +// asymmetry becomes a spurious diff in every test. +// +// Known engine gaps deliberately absorbed here (worked around, so the +// harness itself never trips them): +// - ejs Object.keys(array) omits index keys (node includes them): +// elements are walked by index, and index-shaped keys are filtered +// from the named-property pass on both engines; +// - ejs lacks Date.prototype.toISOString: the ISO string is computed +// from getTime() with civil-date math. + +(function () { + var origLog = console.log; + var origError = console.error; + + function isIdentChar(cc, first) { + if ((cc >= 65 && cc <= 90) || (cc >= 97 && cc <= 122) || cc === 95 || cc === 36) return true; + return !first && cc >= 48 && cc <= 57; + } + + function isIdentLike(s) { + if (s.length === 0) return false; + for (var i = 0; i < s.length; i++) { + if (!isIdentChar(s.charCodeAt(i), i === 0)) return false; + } + return true; + } + + function quoteString(s) { + var out = "'"; + for (var i = 0; i < s.length; i++) { + var cc = s.charCodeAt(i); + var ch = s.charAt(i); + if (ch === "'") out += "\\'"; + else if (ch === "\\") out += "\\\\"; + else if (ch === "\n") out += "\\n"; + else if (ch === "\r") out += "\\r"; + else if (ch === "\t") out += "\\t"; + else if (cc < 32) { + var hex = cc.toString(16); + if (hex.length < 2) hex = "0" + hex; + out += "\\x" + hex; + } else out += ch; + } + return out + "'"; + } + + function numberToString(n) { + if (n === 0 && 1 / n === -Infinity) return "-0"; + return String(n); + } + + function pad(n, w) { + var s = String(n); + while (s.length < w) s = "0" + s; + return s; + } + + // ISO-8601 from epoch millis; civil-from-days per Howard Hinnant. + function dateToISO(d) { + var t; + try { + t = d.getTime(); + } catch (e) { + t = NaN; + } + if (t !== t) return "Invalid Date"; + var ms = t % 86400000; + if (ms < 0) ms += 86400000; + var days = (t - ms) / 86400000; + var z = days + 719468; + var era = Math.floor(z / 146097); + var doe = z - era * 146097; + var yoe = Math.floor( + (doe - Math.floor(doe / 1460) + Math.floor(doe / 36524) - Math.floor(doe / 146096)) / + 365 + ); + var y = yoe + era * 400; + var doy = doe - (365 * yoe + Math.floor(yoe / 4) - Math.floor(yoe / 100)); + var mp = Math.floor((5 * doy + 2) / 153); + var day = doy - Math.floor((153 * mp + 2) / 5) + 1; + var m = mp < 10 ? mp + 3 : mp - 9; + if (m <= 2) y += 1; + var hh = Math.floor(ms / 3600000); + ms -= hh * 3600000; + var mm = Math.floor(ms / 60000); + ms -= mm * 60000; + var ss = Math.floor(ms / 1000); + ms -= ss * 1000; + return ( + pad(y, 4) + "-" + pad(m, 2) + "-" + pad(day, 2) + + "T" + pad(hh, 2) + ":" + pad(mm, 2) + ":" + pad(ss, 2) + "." + pad(ms, 3) + "Z" + ); + } + + // canonical non-negative-integer key, i.e. an array index that the + // element walk already covered + function isIndexKey(k) { + var n = Math.floor(Number(k)); + return n >= 0 && String(n) === k; + } + + function constructorName(v) { + try { + if (Object.getPrototypeOf && Object.getPrototypeOf(v) === null) return null; + var c = v.constructor; + if (typeof c === "function" && typeof c.name === "string" && c.name.length > 0) + return c.name; + } catch (e) {} + return ""; + } + + function fmtArrayBody(v, len, seen) { + var parts = []; + var emptyRun = 0; + for (var i = 0; i < len; i++) { + if (!(i in v)) { + emptyRun++; + continue; + } + if (emptyRun > 0) { + parts.push("<" + emptyRun + " empty item" + (emptyRun === 1 ? "" : "s") + ">"); + emptyRun = 0; + } + parts.push(fmt(v[i], seen)); + } + if (emptyRun > 0) + parts.push("<" + emptyRun + " empty item" + (emptyRun === 1 ? "" : "s") + ">"); + var keys = []; + try { + keys = Object.keys(v); + } catch (e) {} + for (var j = 0; j < keys.length; j++) { + var k = keys[j]; + if (k === "length" || isIndexKey(k)) continue; + parts.push((isIdentLike(k) ? k : quoteString(k)) + ": " + fmt(v[k], seen)); + } + if (parts.length === 0) return "[]"; + return "[ " + parts.join(", ") + " ]"; + } + + function fmtObject(v, seen) { + var prefix = ""; + var cn = constructorName(v); + if (cn === null) prefix = "[Object: null prototype] "; + else if (cn !== "" && cn !== "Object") prefix = cn + " "; + var keys = []; + try { + keys = Object.keys(v); + } catch (e) {} + if (keys.length === 0) return prefix + "{}"; + var parts = []; + for (var i = 0; i < keys.length; i++) { + var k = keys[i]; + parts.push((isIdentLike(k) ? k : quoteString(k)) + ": " + fmt(v[k], seen)); + } + return prefix + "{ " + parts.join(", ") + " }"; + } + + function fmt(v, seen) { + var t = typeof v; + if (v === null) return "null"; + if (t === "undefined") return "undefined"; + if (t === "number") return numberToString(v); + if (t === "boolean") return String(v); + if (t === "string") return quoteString(v); + if (t === "symbol") { + try { + return v.toString(); + } catch (e) { + return "Symbol(?)"; + } + } + if (t === "function") { + var fname = ""; + try { + fname = v.name; + } catch (e) {} + return fname ? "[Function: " + fname + "]" : "[Function (anonymous)]"; + } + + if (seen.indexOf(v) !== -1) return "[Circular]"; + seen.push(v); + var out; + try { + out = fmtNonPrimitive(v, seen); + } catch (e) { + out = "[unserializable: " + e + "]"; + } + seen.pop(); + return out; + } + + function fmtNonPrimitive(v, seen) { + if (Array.isArray(v)) return fmtArrayBody(v, v.length, seen); + if (v instanceof Error) { + var ename = v.name || "Error"; + return v.message ? "[" + ename + ": " + v.message + "]" : "[" + ename + "]"; + } + if (v instanceof Date) return dateToISO(v); + if (v instanceof RegExp) return String(v); + if (typeof Map === "function" && v instanceof Map) { + var mparts = []; + v.forEach(function (val, key) { + mparts.push(fmt(key, seen) + " => " + fmt(val, seen)); + }); + return "Map(" + v.size + ") {" + (mparts.length ? " " + mparts.join(", ") + " " : "") + "}"; + } + if (typeof Set === "function" && v instanceof Set) { + var sparts = []; + v.forEach(function (val) { + sparts.push(fmt(val, seen)); + }); + return "Set(" + v.size + ") {" + (sparts.length ? " " + sparts.join(", ") + " " : "") + "}"; + } + if (typeof v.BYTES_PER_ELEMENT === "number" && typeof v.length === "number") { + var tname = constructorName(v) || "TypedArray"; + var tparts = []; + for (var i = 0; i < v.length; i++) tparts.push(fmt(v[i], seen)); + return tname + "(" + v.length + ")" + (tparts.length ? " [ " + tparts.join(", ") + " ]" : " []"); + } + if (v instanceof Number) return "[Number: " + numberToString(v.valueOf()) + "]"; + if (v instanceof String) return "[String: " + quoteString(v.valueOf()) + "]"; + if (v instanceof Boolean) return "[Boolean: " + String(v.valueOf()) + "]"; + return fmtObject(v, seen); + } + + function fmtTop(v) { + if (typeof v === "string") return v; + return fmt(v, []); + } + + function makeWriter(target) { + return function () { + var parts = []; + for (var i = 0; i < arguments.length; i++) parts.push(fmtTop(arguments[i])); + target(parts.join(" ")); + }; + } + + console.log = makeWriter(function (s) { + origLog(s); + }); + console.warn = makeWriter(function (s) { + origError(s); + }); + console.error = makeWriter(function (s) { + origError(s); + }); +})(); diff --git a/test/harness-run.js b/test/harness-run.js new file mode 100644 index 00000000..c09f732a --- /dev/null +++ b/test/harness-run.js @@ -0,0 +1,8 @@ +// node-side driver for expected-output generation (runtime-P3). +// Usage: node|babel-node harness-run.js +// Installs the harness console shim, then runs the test — the exact +// mirror of the import wrapper tester.js compiles on the ejs side. +// Under babel-node the register hook transpiles the required test, which +// is how import-syntax tests generate. +require("./harness-console-shim.js"); +require(require("path").resolve(process.argv[2])); diff --git a/test/number1.js b/test/number1.js index 46795688..a3b3e6d3 100644 --- a/test/number1.js +++ b/test/number1.js @@ -1,4 +1,3 @@ -// xfail: node outputs {} for console.log(new Number(5)), while SM and JSC output '5'. we err on the SM/JSC side of things here. console.log(Number(5)); console.log(new Number(5)); console.log(new Number(5).valueOf()); diff --git a/test/tester.js b/test/tester.js index 784d2abb..73ecde3a 100644 --- a/test/tester.js +++ b/test/tester.js @@ -28,6 +28,11 @@ let runloop_impl = require("../lib/generated/lib/host-config.js").RUNLOOP_IMPL; const running_in_ci = process.env["CIRCLE_BUILD_NUM"] != null; +// baselines must not depend on the timezone of the machine that generated +// them: local-time Date construction (date3.js) feeds the value-based +// serializer's UTC rendering, so generation and test runs both pin UTC +process.env.TZ = "UTC"; + let platform_to_test = null; let stage_to_run = 0; @@ -132,11 +137,24 @@ function checkStdout(test_name, elapsed, cb) { } } +// the value-based harness (runtime-P3): tests generate and run with +// console.log replaced by the serializer in harness-console-shim.js, on +// both sides, so baselines assert on values, not on node's inspect format +const harness_shim = "harness-console-shim.js"; +const harness_run = "harness-run.js"; + function shouldGenerateExpectedOutput(test_file, expected_file) { - let test_stat = fs.statSync(test_file); try { - let expected_stat = fs.statSync(expected_file); - return test_stat.mtime.getTime() > expected_stat.mtime.getTime(); + let expected_mtime = fs.statSync(expected_file).mtime.getTime(); + // the harness serializer contributes to the expected output too — + // editing it must refresh every baseline + let newest = fs.statSync(test_file).mtime.getTime(); + for (const dep of [harness_shim, harness_run]) { + try { + newest = Math.max(newest, fs.statSync(dep).mtime.getTime()); + } catch (e) {} + } + return newest > expected_mtime; } catch (e) { // XXX verify that e == ENOENT return true; @@ -165,7 +183,7 @@ function processOneTest(gen_expected, test, cb) { if (should_generate && generator !== "none") { console.log("generating expected output for " + test_name + " using " + generator); - exec(generator + " " + test + " > " + expected_name, function (err, stdout) { + exec(generator + " " + harness_run + " " + test + " > " + expected_name, function (err, stdout) { if (err) { cb(err); return; @@ -190,18 +208,56 @@ function processOneTest(gen_expected, test, cb) { const extra_flags = process.env.EJS_EXTRA_FLAGS ? process.env.EJS_EXTRA_FLAGS.split(" ") : []; + // generator:none tests keep the legacy path (raw stdout against + // a checked-in baseline, no shim); everything else compiles a + // generated wrapper that imports the console shim, then the + // test — the mirror of harness-run.js on the node side + let compile_target = test; + let output_args = []; + let wrapper_name = null; + if (generators[test_name] !== "none") { + wrapper_name = ".__wrap__." + test_name; + const spec = "./" + test_name.replace(/\.js$/, ""); + fs.writeFileSync( + wrapper_name, + "// generated by tester.js (value-based harness); deleted after compile\n" + + 'import "./' + harness_shim.replace(/\.js$/, "") + '";\n' + + 'import "' + spec + '";\n' + ); + compile_target = "./" + wrapper_name; + output_args = ["-o", test + ".exe"]; + } + // per-test TMPDIR (the types-diff lane's lesson): every test + // compile now includes the harness-console-shim module, and the + // compiler's temp names are only unique within one process — + // concurrent compiles sharing a TMPDIR would clobber each + // other's shim .bc/.o + const compile_tmpdir = fs.mkdtempSync(path.join(os.tmpdir(), "ejstest-compile-")); + const removeWrapper = function () { + if (wrapper_name != null) { + try { + fs.unlinkSync(wrapper_name); + } catch (e) {} + wrapper_name = null; + } + try { + fs.rmSync(compile_tmpdir, { recursive: true, force: true }); + } catch (e) {} + }; const ccomp = spawn( compilers[stage_to_run], - platform_target.concat(extra_flags).concat([ + platform_target.concat(extra_flags).concat(output_args).concat([ "--srcdir", "--moduledir", "../node-compat", "--moduledir", "../ejs-llvm", - test, - ]) + compile_target, + ]), + { env: Object.assign({}, process.env, { TMPDIR: compile_tmpdir }) } ); ccomp.on("exit", function (code, errstring) { + removeWrapper(); if (code !== 0) { const elapsed = getElapsed(start); testFailed(test_name, `compiler failed (exit code = ${code})`, elapsed); @@ -242,6 +298,7 @@ function processOneTest(gen_expected, test, cb) { }); }); ccomp.on("error", function (err) { + removeWrapper(); const elapsed = getElapsed(start); testFailed(test_name, err.toString(), elapsed); cb(); @@ -256,32 +313,28 @@ function processOneTest(gen_expected, test, cb) { } function processTests(gen_expected, tests, cb) { - let i = 0; - const e = tests.length; - + // (the old scheduler seeded i=test_threads but incremented i before + // reading tests[i] in the callback — the test at index test_threads + // was silently skipped in BOTH passes, which is how weakmap2.js ran + // on a years-stale baseline) + let next = 0; let num_outstanding = 0; - const processTestCb = function () { - //console.log("processTestCb"); - i++; - num_outstanding--; - if (i >= e) { - //console.log("doing setTimeout"); - if (num_outstanding == 0) { - setTimeout(cb, 0); - } - return; + const launch = function () { + while (num_outstanding < test_threads && next < tests.length) { + const t = tests[next++]; + num_outstanding++; + processOneTest(gen_expected, t, function () { + num_outstanding--; + if (next >= tests.length && num_outstanding === 0) { + setTimeout(cb, 0); + return; + } + launch(); + }); } - - num_outstanding++; - processOneTest(gen_expected, tests[i], processTestCb); }; - - for (let j = 0; j < test_threads; j++) { - processOneTest(gen_expected, tests[i++], processTestCb); - - num_outstanding++; - } + launch(); } function readTest(test) { diff --git a/test/toLocaleString3.js b/test/toLocaleString3.js index 97910c89..7a58cb83 100644 --- a/test/toLocaleString3.js +++ b/test/toLocaleString3.js @@ -1,3 +1,5 @@ +// xfail: Number.prototype.toLocaleString lacks ICU's default maximumFractionDigits=3 rounding (node: 1.236, ejs: 1.2355). stale-baseline zombie flushed by runtime-P3 + var a = [1.2355, 1.2, "hi there", { a: 5 }]; console.log(a.toLocaleString()); diff --git a/test/tostring5.js b/test/tostring5.js index 59959245..a465899e 100644 --- a/test/tostring5.js +++ b/test/tostring5.js @@ -1,3 +1,5 @@ +// xfail: Date.prototype is an ordinary object in ES2015+ (node throws TypeError on Date.prototype.toString()); ejs still gives it a [[DateValue]]. stale-baseline zombie flushed by runtime-P3 + console.log("date"); console.log(Date.prototype.toString()); console.log("object date.proto.tostring"); From 3c252f96cdcef6cd8556a617300f68217a45af07 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 29 Jul 2026 17:25:11 -0700 Subject: [PATCH 133/146] =?UTF-8?q?eir:=20compiler-P2=20(P7.4)=20=E2=80=94?= =?UTF-8?q?=20the=20TypeScript=20port,=20finished;=20babel=20removed?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit //lib:generated converts the tsjs ES-module tree to CommonJS with one tsc --allowJs invocation (esModuleInterop matches babel's interop; the @llvm/@node-compat rewrites move to the staging side). test/tester.js becomes strict tester.ts (compiled in the staged tree by buck-test-stage.sh; test/tsconfig.json owns the settings) and the babel-node baseline generator becomes a tsc transpile of each import-syntax test's relative-import closure — directive renamed `generator: esm` across 114 tests, baselines byte-identical (112/112 runnable; the esprima-roundtrip pair is skip-if:true and was unrunnable under babel-node too). runtime/gen-atoms.js becomes gen-atoms.ts via //runtime:gen-atoms-js, output byte-identical on both atoms headers. babel is gone from package.json, the lock, .babelrc, and CI. Gates: tsc -p tsconfig.json + tsc -p test clean; test-eir = the 11 compiler-P1.1 pins only (verified same-by-name); stage0/1/2/3 and shapes-off 424/21/0; lowtier OK. Co-Authored-By: Claude Fable 5 --- .babelrc | 8 - .github/workflows/ci.yml | 7 +- .gitignore | 4 + BUCK | 6 +- README.md | 2 +- buck-test-stage.sh | 18 +- ci/install-node-osx.sh | 1 - docs/compiler-p2-results.md | 110 + docs/compiler-plan.md | 10 +- docs/plans.md | 8 +- ejs-llvm/BUCK | 4 +- lib/BUCK | 14 +- lib/buck-gen-js.sh | 54 +- lib/buck-gen-tsjs.sh | 6 +- package-lock.json | 8169 ++++-------------------- package.json | 3 - runtime/BUCK | 20 +- runtime/{gen-atoms.js => gen-atoms.ts} | 48 +- test/array-subclassing3.js | 2 +- test/array-subclassing4.js | 2 +- test/array23.js | 2 +- test/array24.js | 2 +- test/array25.js | 2 +- test/array26.js | 2 +- test/array27.js | 2 +- test/array30.js | 2 +- test/array31.js | 2 +- test/arrow1.js | 2 +- test/arrow2.js | 2 +- test/arrow3.js | 2 +- test/class1.js | 2 +- test/class2.js | 2 +- test/class3.js | 2 +- test/class4.js | 2 +- test/class5.js | 2 +- test/class6.js | 2 +- test/closure3.js | 2 +- test/closure7.js | 2 +- test/codepoint-eq1.js | 2 +- test/computed-props1.js | 2 +- test/computed-props3.js | 2 +- test/const1.js | 2 +- test/defaultargs1.js | 2 +- test/defaultargs2.js | 2 +- test/destructure1.js | 2 +- test/destructure2.js | 2 +- test/destructure3.js | 2 +- test/destructure4.js | 2 +- test/eir-export1.js | 2 +- test/eir-toplevel1.js | 2 +- test/esprima-roundtrip1.js | 2 +- test/esprima-roundtrip2.js | 2 +- test/esprima1.js | 7 +- test/for3.js | 2 +- test/for5.js | 2 +- test/for6.js | 2 +- test/forof1.js | 2 +- test/forof2.js | 2 +- test/function-overriding2.js | 2 +- test/generator1.js | 2 +- test/generator10.js | 2 +- test/generator11.js | 2 +- test/generator12.js | 2 +- test/generator13.js | 2 +- test/generator14.js | 2 +- test/generator15.js | 2 +- test/generator16.js | 2 +- test/generator17.js | 2 +- test/generator18.js | 2 +- test/generator19.js | 2 +- test/generator2.js | 2 +- test/generator20.js | 2 +- test/generator21.js | 2 +- test/generator3.js | 2 +- test/generator5.js | 2 +- test/generator6.js | 2 +- test/generator7.js | 2 +- test/generator8.js | 2 +- test/generator9.js | 2 +- test/harness-console-shim.js | 3 +- test/harness-run.js | 9 +- test/map-subclassing1.js | 2 +- test/map2.js | 2 +- test/map3.js | 2 +- test/map4.js | 2 +- test/map5.js | 2 +- test/math1.js | 2 +- test/modules1.js | 2 +- test/modules3.js | 2 +- test/modules4.js | 2 +- test/modules5.js | 2 +- test/modules6.js | 2 +- test/object-assign1.js | 2 +- test/object-setPrototypeOf1.js | 2 +- test/object16.js | 2 +- test/object17.js | 2 +- test/object18.js | 2 +- test/promise1.js | 2 +- test/promise2.js | 2 +- test/reflect-get1.js | 2 +- test/reflect-isExtensible1.js | 2 +- test/reflect-set1.js | 2 +- test/reflect-setPrototypeOf1.js | 2 +- test/reflect1.js | 2 +- test/set1.js | 2 +- test/set2.js | 2 +- test/set3.js | 2 +- test/set4.js | 2 +- test/set5.js | 2 +- test/shorthand-method1.js | 2 +- test/shorthand-prop1.js | 2 +- test/spread1.js | 2 +- test/spread2.js | 2 +- test/spread3.js | 2 +- test/spread4.js | 2 +- test/spread5.js | 2 +- test/spread6.js | 2 +- test/spread7.js | 2 +- test/string-codePointAt1.js | 2 +- test/string-contains1.js | 2 +- test/string-endsWith1.js | 2 +- test/string-iter1.js | 2 +- test/string-raw1.js | 2 +- test/string-repeat1.js | 2 +- test/string-startsWith1.js | 2 +- test/symbol-iterator1.js | 2 +- test/symbol-tostringtag1.js | 2 +- test/symbol-tostringtag2.js | 2 +- test/symbol2.js | 2 +- test/template-string1.js | 2 +- test/tester-deps.d.ts | 13 + test/{tester.js => tester.ts} | 288 +- test/tsconfig.json | 21 + test/typedarray8.js | 2 +- test/weakmap1.js | 2 +- test/weakmap2.js | 2 +- test/weakmap3.js | 2 +- test/weakset1.js | 2 +- test/weakset2.js | 2 +- test/weakset3.js | 2 +- tsconfig.json | 2 +- 141 files changed, 1837 insertions(+), 7230 deletions(-) delete mode 100644 .babelrc create mode 100644 docs/compiler-p2-results.md rename runtime/{gen-atoms.js => gen-atoms.ts} (52%) mode change 100755 => 100644 create mode 100644 test/tester-deps.d.ts rename test/{tester.js => tester.ts} (61%) create mode 100644 test/tsconfig.json diff --git a/.babelrc b/.babelrc deleted file mode 100644 index 9a451693..00000000 --- a/.babelrc +++ /dev/null @@ -1,8 +0,0 @@ -{ - "presets": [ - ["@babel/preset-env", { - "modules": "commonjs" - }] - ], - "plugins": [] -} diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 6237eae9..3257c515 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -60,7 +60,9 @@ jobs: run: ./node-llvm/build-addon.sh "$(brew --prefix llvm)" - name: TypeScript typecheck - run: node node_modules/typescript/bin/tsc -p tsconfig.json + run: | + node node_modules/typescript/bin/tsc -p tsconfig.json + node node_modules/typescript/bin/tsc -p test --noEmit - name: buck2 bootstrap matrix run: | @@ -129,11 +131,8 @@ jobs: - name: Build the node-llvm addon run: ./node-llvm/build-addon.sh /usr/lib/llvm-22 - # babel-node (for `// generator: babel-node` test baselines) comes - # from the repo's node_modules - name: buck2 bootstrap matrix run: | - export PATH="$PWD/node_modules/.bin:$PATH" buck2 build --config llvm.prefix=/usr/lib/llvm-22 \ //:test-eir \ //:test-stage0 \ diff --git a/.gitignore b/.gitignore index d4465d25..2f23cf07 100644 --- a/.gitignore +++ b/.gitignore @@ -24,5 +24,9 @@ echojs-*.tar.gz node_modules/ .stamp-* +# tsc output of test/tester.ts (buck-test-stage.sh compiles it when +# staging; hand-runs compile it in place) +test/tester.js + # assembled stage0-style work trees (maam diff harness / --types diff lane) maam-difftree/ diff --git a/BUCK b/BUCK index 0a62b5ac..3263eac3 100644 --- a/BUCK +++ b/BUCK @@ -51,8 +51,8 @@ genrule( }), ) -# stage1: the babel'd compiler running under node (with the node-llvm -# addon) compiles ejs-es6.js to a native executable. +# stage1: the generated (CommonJS) compiler running under node (with the +# node-llvm addon) compiles ejs-es6.js to a native executable. genrule( name = "ejs.exe.stage1", srcs = ["buck-stage.sh"], @@ -87,7 +87,7 @@ alias( actual = ":ejs.exe.stage1", ) -# EIR unit tests (run under node against the babel'd tree): +# EIR unit tests (run under node against the generated CommonJS tree): # buck2 build //:test-eir genrule( name = "test-eir", diff --git a/README.md b/README.md index aa85a112..b865de73 100644 --- a/README.md +++ b/README.md @@ -32,7 +32,7 @@ $ buck2 build //:test-stage3 # run the test suite against stage3 Useful targets: - `//:ejs.exe.stage{1,2,3}` — the bootstrap stages (`//:ejs.exe` is an alias for stage1) -- `//:test-stage{1,2,3}` — build a stage and run `test/tester.js` against it; the build fails if any test fails, and the output artifact is the test log +- `//:test-stage{1,2,3}` — build a stage and run the test suite (`test/tester.ts`) against it; the build fails if any test fails, and the output artifact is the test log - `//:srcdir-tree` — the assembled `--srcdir` layout the compiler runs against If your llvm lives somewhere other than `/opt/homebrew/opt/llvm`, change `[llvm] prefix` in `.buckconfig`. diff --git a/buck-test-stage.sh b/buck-test-stage.sh index 84b13e25..0b710d40 100644 --- a/buck-test-stage.sh +++ b/buck-test-stage.sh @@ -1,8 +1,8 @@ #!/bin/bash # Invoked by //:test-stage{1,2,3}. Assembles a repo-shaped tree (the -# --srcdir tree + test/ + the stage executable) and runs test/tester.js -# against it. The genrule fails if any test fails; the test log is the -# output artifact. +# --srcdir tree + test/ + the stage executable), compiles the runner +# (test/tester.ts) in the staged tree, and runs it. The genrule fails +# if any test fails; the test log is the output artifact. set -euo pipefail TREE="$1" # //:srcdir-tree @@ -15,8 +15,9 @@ EXTRA_FLAGS="${7:-}" # extra compiler flags, e.g. --ir TEST_ENV="${8:-}" # extra env for the tester run, e.g. EJS_SHAPES=off # (the runtime A/B lanes: shapes-plan P4.1) -# node_modules (glob/colors/temp for the tester) come from the repo, same -# as the babel step in //lib:generated. +# node_modules (glob/colors/temp for the tester, typescript for the +# tester compile + esm baseline generation) come from the repo, same as +# the tsc steps in //lib. REPO="${TMP%%/buck-out/*}" OUT_ABS="$(cd "$(dirname "$OUT")" && pwd)/$(basename "$OUT")" @@ -29,7 +30,8 @@ chmod -R u+w "$WORK" mkdir -p "$WORK/lib/generated" cp -RL "$GENERATED"/. "$WORK/lib/generated/" if [ "$STAGE_NUM" = "0" ]; then - # stage 0 runs the babel'd compiler under node via the ../ejs driver + # stage 0 runs the generated (CommonJS) compiler under node via the + # ../ejs driver printf '#!/bin/sh\ndir=$(cd `dirname $0`; pwd)\nexec node $dir/lib/generated/ejs-es6.js "$@"\n' > "$WORK/ejs" chmod +x "$WORK/ejs" else @@ -40,6 +42,10 @@ mkdir -p "$WORK/test" cp -RL "$TEST_FILES"/. "$WORK/test/" chmod -R u+w "$WORK/test" +# the runner is TypeScript (compiler-P2): compile the staged copy in +# place — tsconfig.json ships with the test tree +node "$REPO/node_modules/typescript/bin/tsc" -p "$WORK/test" + # the tester regenerates an expected-out (using node) when the test file # is newer than it; the copies above have fresh mtimes, so re-stamp the # expected outputs afterwards to keep them newer. diff --git a/ci/install-node-osx.sh b/ci/install-node-osx.sh index 97dab367..f5ed9d80 100644 --- a/ci/install-node-osx.sh +++ b/ci/install-node-osx.sh @@ -1,4 +1,3 @@ set -e npm install -g node npm install -g node-gyp -npm install -g babel diff --git a/docs/compiler-p2-results.md b/docs/compiler-p2-results.md new file mode 100644 index 00000000..1d542eb6 --- /dev/null +++ b/docs/compiler-p2-results.md @@ -0,0 +1,110 @@ +# compiler-P2 results — the TypeScript port, finished (P7.4) + +Phase: compiler-P2 (plans.md P7.4). Branch `eir`, 2026-07-29. + +The compiler sources were already strict TS (the EIR work's incremental +port); what remained was the tooling that still ran JS through babel, +and the residual JS entry points. Both are gone: **babel is no longer a +dependency of anything in the repo.** + +## What changed + +### 1. `//lib:generated`: the babel step is now tsc + +`lib/buck-gen-js.sh` used to run every file of the stage0 tree through +`@babel/cli` (preset-env, `modules: commonjs`), one process per file. +It now stages the `//lib:tsjs` ES-module tree (plus host-config and the +esprima/escodegen/estraverse/esutils externals), applies the +`"@llvm"`→`"llvm"` / `"@node-compat/"`→`""` rewrites with sed on the +way in, and runs **one** tsc invocation over the whole tree: +`--allowJs --module commonjs --esModuleInterop --target es2016` — no +type-checking (no `checkJs`), just the module conversion babel used to +do. `--esModuleInterop` matches babel's default/namespace-import +interop against CJS modules (the node-llvm addon, glob, ...). +TS 7 note: `--moduleResolution node10` is gone; the default for +`--module commonjs` resolves the extensionless relative imports fine. + +### 2. `// generator: babel-node` → `// generator: esm` + +Import-syntax tests can't run under plain node (extensionless relative +specifiers); babel-node's require hook used to transpile them during +expected-output generation. The tester now does it with tsc: transpile +the test plus its relative-import closure to CommonJS in a scratch dir +(`generateExpectedEsm` in tester.ts), copy the harness shim and driver +alongside (unconverted — the serializer runs byte-exact), and run +`node harness-run.js ` as before. The directive is +renamed in all 114 test files; `esm` names the test's need, not a tool. + +Closure resolution mirrors the compiler's: file first, then +`directory/index.js` (modules6). Two tests import from outside test/ +(`esprima-roundtrip{1,2}`, `../external-deps/...`) — both are +`skip-if: true` and were unrunnable under babel-node too; the esm +generator doesn't reach outside test/ (noted in esprima1.js). + +**Parity:** all 112 runnable esm tests generate byte-identical output +under babel-node and under the tsc path (the other 2 are the skipped +esprima-roundtrip pair). End-to-end through the real tester, a deleted +baseline regenerates byte-identical to the committed one. + +### 3. `test/tester.js` → `test/tester.ts` + +Ported under the repo's strict flag family (strict, +noUncheckedIndexedAccess, noImplicitOverride) with a small +`tester-deps.d.ts` (temp has no types; colors' chained `red.bold` isn't +in its shipped types). `test/tsconfig.json` holds the compile settings +(CommonJS output; skipLibCheck because glob's path-scurry .d.ts trips +over @types/node 26). buck-test-stage.sh compiles the staged copy in +place (`tsc -p "$WORK/test"`) before running it; the emitted +test/tester.js is gitignored. CI typechecks it (`tsc -p test +--noEmit`) next to the root config. + +Faithful port, plus: the dead `-s` range check (`< 0 && > 2`) now +actually validates 0..3; the unused CircleCI `running_in_ci` and the +collected-but-unused stderr buffer are gone; stage-index and +tests-array accesses are guarded (noUncheckedIndexedAccess). The +scheduler, xfail/skip-if/generator directive handling, wrapper +generation, and per-test TMPDIR behavior are unchanged. + +### 4. `runtime/gen-atoms.js` → `runtime/gen-atoms.ts` + +Compiled by the new `//runtime:gen-atoms-js` genrule (tsc, same strict +family); `//runtime:atoms` and `//ejs-llvm:atoms` consume the compiled +JS. Output verified byte-identical on both atoms headers. Included in +the root tsconfig typecheck. + +### 5. babel removed + +`@babel/cli`, `@babel/node`, `@babel/preset-env` dropped from +package.json (lock refreshed; `grep -c babel package-lock.json` = 0), +`.babelrc` deleted, ci.yml's babel-node PATH export removed, stale +"babel'd tree" comments updated across BUCK files and scripts. + +## What stays JS deliberately + +- `test/harness-console-shim.js` — must compile under ejs and run under + node byte-identically; conservative ES5 by contract (runtime-P3). +- `test/harness-run.js` — 8-line node driver; a copy rides into the esm + generator's transpile dir, so it stays plain CJS. +- `lib/host-config.js.in` — 3-line generated config (has a .d.ts). +- The esprima/escodegen/estraverse/esutils forks — language-P5's + un-forking is the owner. +- The test corpus itself, and `samples/`. + +## Gates + +- typecheck: `tsc -p tsconfig.json` and `tsc -p test --noEmit` clean +- test-eir: the standing 11 compiler-P1.1 pins only, no new reds + (verified same 11 by name against the tsc-converted tree) +- stage0/1/2/3 suites: 424 pass / 21 xfail / 0 fail each +- test-stage1-shapes-off: 424 / 21 / 0 +- test-eir-lowtier: OK +- esm-generation parity: 112/112 runnable byte-identical vs babel-node + +## Notes / follow-ons + +- The stage0 tree is now es2016-level JS (babel's targetless preset-env + downleveled to ES5); node 22 runs both, nothing observed the change. +- compiler-P3 (TS as compiler *input*) is unchanged by this phase and + still coordinates with language-P2 at the parser seam. +- `// generator: esm` is tool-agnostic on purpose: if node's own loader + hooks ever replace the tsc transpile, no directive churn. diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md index e264723e..289ac5ab 100644 --- a/docs/compiler-plan.md +++ b/docs/compiler-plan.md @@ -112,13 +112,19 @@ shaped-world continuation), shape-guard regions (see shapes-plan). the two ops. Fix the sinking gap (or decide it's deferred and assert the shaped alloc form), then repair the expectations with substring-safe matchers. -- [ ] **compiler-P2 — TypeScript port of the compiler.** The compiler +- [x] **compiler-P2 — TypeScript port of the compiler.** The compiler converts from JS to TypeScript (largely done for lib/eir/ and lib/*.ts — the strict-TS conversion landed with the EIR work); remaining: the babel step in `//lib:generated` becomes tsc, and the residual JS entry points convert. Sequenced before language-plan work (new-feature work is safer with types - underneath it). + underneath it). DONE 2026-07-29 — docs/compiler-p2-results.md + (one tsc --allowJs pass replaces per-file babel in + //lib:generated; tester.ts + gen-atoms.ts ported strict; + `// generator: babel-node` → `// generator: esm` with + byte-identical baselines; babel removed from package.json/CI; + deliberate JS residue: the harness shim + driver, host-config, + the external-deps forks — language-P5's). - [ ] **compiler-P3 — TypeScript as compiler input (tentative).** Slots in at the parser layer (type-stripping or a parser swap, coordinated with language-P2). TS type annotations then seed diff --git a/docs/plans.md b/docs/plans.md index d68447c9..c529f79c 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -123,8 +123,12 @@ runtime-plan.md, compiler-plan.md. floats on 22.x; the un-masking flushed 3 runtime bugs fixed + 3 pinned, plus a tester scheduler bug that had silently skipped weakmap2 forever). -- [ ] **P7.4** finish the TypeScript port of the compiler; babel step - becomes tsc (compiler-P2). +- [x] **P7.4** finish the TypeScript port of the compiler; babel step + becomes tsc (compiler-P2). DONE 2026-07-29 — + docs/compiler-p2-results.md (//lib:generated converts modules + with one tsc --allowJs pass; tester.ts and gen-atoms.ts ported; + `generator: esm` baselines byte-identical vs babel-node; babel + removed from the repo). - [ ] **P7.5** clang-style pass configuration: -O suites define the optimizer tiers, -f/-fno- per-pass flags replace the EJS_* env vars, which revert to debugging-only (compiler-P5; independent, diff --git a/ejs-llvm/BUCK b/ejs-llvm/BUCK index 7b472993..b998585d 100644 --- a/ejs-llvm/BUCK +++ b/ejs-llvm/BUCK @@ -4,10 +4,10 @@ genrule( name = "atoms", srcs = [ "ejs-llvm-atoms.h", - "//runtime:gen-atoms.js", + "//runtime:gen-atoms-js", ], out = "ejs-llvm-atoms-gen.c", - cmd = "node $SRCDIR/gen-atoms.js $SRCDIR/ejs-llvm-atoms.h > $OUT", + cmd = "node $(location //runtime:gen-atoms-js) $SRCDIR/ejs-llvm-atoms.h > $OUT", ) # The .ejs module descriptor, with the link flags the EJS compiler must pass diff --git a/lib/BUCK b/lib/BUCK index 5838144c..5d7efcbb 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -12,10 +12,9 @@ genrule( ) # The compiler as plain ES-module JS: .ts sources compiled through tsc -# (strict), .js sources copied through unchanged during the incremental -# TypeScript port. Layout: $OUT/ejs-es6.js + $OUT/lib/**.js. This is -# what stage1+ self-compiles (via //:srcdir-tree) and what the babel -# step below consumes for the node-hosted stage0. +# (strict). Layout: $OUT/ejs-es6.js + $OUT/lib/**.js. This is what +# stage1+ self-compiles (via //:srcdir-tree) and what the CommonJS +# conversion below consumes for the node-hosted stage0. genrule( name = "tsjs", srcs = glob( @@ -38,9 +37,10 @@ genrule( visibility = ["PUBLIC"], ) -# The node-runnable (stage0) compiler: babel-compiled equivalents of -# ejs-es6.js, lib/*.js and the esprima/escodegen/... support modules. -# Layout matches lib/generated/ from the Makefile build. +# The node-runnable (stage0) compiler: CommonJS (tsc-converted) +# equivalents of ejs-es6.js, lib/*.js and the esprima/escodegen/... +# support modules. Layout matches lib/generated/ from the Makefile +# build. genrule( name = "generated", srcs = [ diff --git a/lib/buck-gen-js.sh b/lib/buck-gen-js.sh index e39bfedd..9ec0ad45 100644 --- a/lib/buck-gen-js.sh +++ b/lib/buck-gen-js.sh @@ -1,44 +1,49 @@ #!/bin/bash # Invoked by //lib:generated. Produces the equivalent of lib/generated/: -# the compiler (the //lib:tsjs tree — tsc-compiled + passed-through JS) -# run through babel (so stage0 can run under node), with the same import -# rewrites lib/Makefile applies: +# the compiler (the //lib:tsjs tree — ES-module JS) converted to +# CommonJS so stage0 can run under node, with the same import rewrites +# lib/Makefile applied: # "@llvm" -> "llvm" (resolved via NODE_PATH to node-llvm) # "@node-compat/"-> "" (use node's own os/path/fs/...) # -# babel and its presets come from the repo's node_modules, which buck2 -# doesn't track as an input (mirrors the Makefile treating node_modules as -# an ambient dev dependency). The repo root is recovered from $TMP, which +# The module conversion is tsc in --allowJs transpile mode (compiler-P2; +# this step was babel until then). typescript comes from the repo's +# node_modules, which buck2 doesn't track as an input (same treatment as +# in buck-gen-tsjs.sh). The repo root is recovered from $TMP, which # buck2 always places under /buck-out/. set -euo pipefail TSJS="$1" # //lib:tsjs — $TSJS/ejs-es6.js + $TSJS/lib/**.js REPO="${TMP%%/buck-out/*}" -BABEL_JS="$REPO/node_modules/@babel/cli/bin/babel.js" -BABELRC="$REPO/.babelrc" +TSC="$REPO/node_modules/typescript/bin/tsc" mkdir -p "$OUT" OUTABS="$(cd "$OUT" && pwd)" -run_babel() { - local src="$1" dst="$2" +# stage the ES-module tree, applying the import rewrites on the way in +# (pre-conversion: tsc then turns the rewritten imports into require()s) +STAGE="$TMP/genjs-stage" +rm -rf "$STAGE" +mkdir -p "$STAGE" + +stage_one() { + local src="$1" dst="$STAGE/$2" mkdir -p "$(dirname "$dst")" - node "$BABEL_JS" --config-file "$BABELRC" "$src" \ - | sed -e 's,"@llvm","llvm",' -e "s,'@llvm','llvm'," -e 's,@node-compat/,,' \ - > "$dst" + sed -e 's,"@llvm","llvm",' -e "s,'@llvm','llvm'," -e 's,@node-compat/,,' \ + "$src" > "$dst" } (cd "$TSJS/lib" && find . -name "*.js" | sed 's,^\./,,') | while read -r f; do - run_babel "$TSJS/lib/$f" "$OUTABS/lib/$f" + stage_one "$TSJS/lib/$f" "lib/$f" done -run_babel "$TSJS/ejs-es6.js" "$OUTABS/ejs-es6.js" +stage_one "$TSJS/ejs-es6.js" "ejs-es6.js" cd "$SRCDIR" # host-config.js is generated (staged at $SRCDIR root by the genrule) -run_babel host-config.js "$OUTABS/lib/host-config.js" +stage_one host-config.js "lib/host-config.js" for f in esprima/esprima-es6.js \ escodegen/escodegen-es6.js \ @@ -47,5 +52,20 @@ for f in esprima/esprima-es6.js \ esutils/lib/code.js \ esutils/lib/keyword.js \ esutils/lib/ast.js; do - run_babel "compiler-js/$f" "$OUTABS/external-deps/$f" + stage_one "compiler-js/$f" "external-deps/$f" done + +# one tsc transpile over the whole tree: ES modules -> CommonJS. +# --allowJs only, no checkJs — no type-checking, just the module +# conversion babel used to do. --esModuleInterop matches babel's +# default/namespace-import interop against CJS modules (llvm, glob, ...). +JS_FILES=$(cd "$STAGE" && find . -name "*.js" | sort) +(cd "$STAGE" && node "$TSC" \ + --ignoreConfig \ + --allowJs \ + --target es2016 \ + --module commonjs \ + --esModuleInterop \ + --rootDir . \ + --outDir "$OUTABS" \ + $JS_FILES) diff --git a/lib/buck-gen-tsjs.sh b/lib/buck-gen-tsjs.sh index c5d7ccb7..4050223c 100644 --- a/lib/buck-gen-tsjs.sh +++ b/lib/buck-gen-tsjs.sh @@ -5,11 +5,11 @@ # layout: # $OUT/ejs-es6.js # $OUT/lib/{*.js, passes/*.js, eir/*.js} -# Both //lib:generated (babel for the node-hosted stage0) and -# //:srcdir-tree (stage1+ self-compiles) consume this tree. +# Both //lib:generated (the CommonJS conversion for the node-hosted +# stage0) and //:srcdir-tree (stage1+ self-compiles) consume this tree. # # typescript comes from the repo's node_modules, which buck2 doesn't -# track as an input (same treatment as babel in buck-gen-js.sh). +# track as an input (same treatment as in buck-gen-js.sh). set -euo pipefail REPO="${TMP%%/buck-out/*}" diff --git a/package-lock.json b/package-lock.json index d545e8d9..57c6d675 100644 --- a/package-lock.json +++ b/package-lock.json @@ -9,9 +9,6 @@ "version": "0.0.0", "license": "MIT", "dependencies": { - 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}, - "update-browserslist-db": { - "version": "1.0.11", - "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.0.11.tgz", - "integrity": "sha512-dCwEFf0/oT85M1fHBg4F0jtLwJrutGoHSQXCh7u4o2t1drG+c0a9Flnqww6XUKSfQMPpJBRjU8d4RXB09qtvaA==", - "requires": { - "escalade": "^3.1.1", - "picocolors": "^1.0.0" - } - }, - "v8flags": { - "version": "3.2.0", - "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz", - "integrity": "sha512-mH8etigqMfiGWdeXpaaqGfs6BndypxusHHcv2qSHyZkGEznCd/qAXCWWRzeowtL54147cktFOC4P5y+kl8d8Jg==", - "requires": { - "homedir-polyfill": "^1.0.1" - } - }, "which": { "version": "2.0.2", "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz", @@ -8439,30 +2759,6 @@ "isexe": "^2.0.0" } }, - "which-boxed-primitive": { - "version": "1.0.2", - "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz", - "integrity": "sha512-bwZdv0AKLpplFY2KZRX6TvyuN7ojjr7lwkg6ml0roIy9YeuSr7JS372qlNW18UQYzgYK9ziGcerWqZOmEn9VNg==", - "requires": { - "is-bigint": "^1.0.1", - "is-boolean-object": "^1.1.0", - "is-number-object": "^1.0.4", - "is-string": "^1.0.5", - "is-symbol": "^1.0.3" - } - }, - "which-typed-array": { - "version": "1.1.11", - "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.11.tgz", - "integrity": "sha512-qe9UWWpkeG5yzZ0tNYxDmd7vo58HDBc39mZ0xWWpolAGADdFOzkfamWLDxkOWcvHQKVmdTyQdLD4NOfjLWTKew==", - "requires": { - "available-typed-arrays": "^1.0.5", - "call-bind": "^1.0.2", - "for-each": "^0.3.3", - "gopd": "^1.0.1", - "has-tostringtag": "^1.0.0" - } - }, "workerpool": { "version": "6.2.1", "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.2.1.tgz", @@ -8544,11 +2840,6 @@ "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz", "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==" }, - "yallist": { - "version": "3.1.1", - "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz", - "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==" - }, "yargs": { "version": "16.2.0", "resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz", diff --git a/package.json b/package.json index 865148a7..b2177b63 100644 --- a/package.json +++ b/package.json @@ -51,9 +51,6 @@ "homepage": "https://github.com/toshok/echojs", "private": true, "dependencies": { - "@babel/cli": "^7.22.15", - "@babel/node": "^7.22.19", - "@babel/preset-env": "^7.22.20", "colors": "^1.4.0", "glob": "^10.3.4", "mocha": "^10.2.0", diff --git a/runtime/BUCK b/runtime/BUCK index 029e9331..de148c24 100644 --- a/runtime/BUCK +++ b/runtime/BUCK @@ -1,7 +1,17 @@ load("//:defs.bzl", "EJS_COMPILER_FLAGS", "LLC_MTRIPLE", "llvm_bin") -export_file( - name = "gen-atoms.js", +# gen-atoms.ts compiled to node-runnable JS (typescript comes from the +# repo's node_modules, untracked by buck2 — same treatment as the +# compiler's tsc steps in //lib) +genrule( + name = "gen-atoms-js", + srcs = ["gen-atoms.ts"], + out = "gen-atoms.js", + cmd = 'REPO="${TMP%%/buck-out/*}"; node "$REPO/node_modules/typescript/bin/tsc" ' + + "--ignoreConfig --strict --noUncheckedIndexedAccess --noImplicitOverride " + + "--noEmitOnError --target es2016 --module commonjs " + + '--types node --typeRoots "$REPO/node_modules/@types" ' + + '--outDir "${OUT%/*}" $SRCDIR/gen-atoms.ts', visibility = ["PUBLIC"], ) @@ -9,13 +19,13 @@ genrule( name = "atoms", srcs = [ "ejs-atoms.h", - "gen-atoms.js", + ":gen-atoms-js", ], out = "ejs-atoms-gen.c", - # gen-atoms.js emits definitions only; add the includes it needs to + # gen-atoms emits definitions only; add the includes it needs to # compile as a standalone translation unit cmd = "{ printf '#include \"ejs.h\"\\n#include \"ejs-value.h\"\\n#include \"ejs-string.h\"\\n\\n'; " + - "node $SRCDIR/gen-atoms.js $SRCDIR/ejs-atoms.h; } > $OUT", + "node $(location :gen-atoms-js) $SRCDIR/ejs-atoms.h; } > $OUT", ) genrule( diff --git a/runtime/gen-atoms.js b/runtime/gen-atoms.ts old mode 100755 new mode 100644 similarity index 52% rename from runtime/gen-atoms.js rename to runtime/gen-atoms.ts index d66fadb7..27308c47 --- a/runtime/gen-atoms.js +++ b/runtime/gen-atoms.ts @@ -1,33 +1,43 @@ -#!/usr/bin/env node +// Generates the static-atom tables: reads an EJS_ATOM(...) header and +// emits the ucs2 literals, EJSPrimString/ejsval definitions, and the +// _ejs_init_static_strings() initializer. Compiled to JS by +// //runtime:gen-atoms-js (tsc) and run under node at build time by the +// //runtime:atoms and //ejs-llvm:atoms genrules. -const fs = require("fs"); +import * as fs from "fs"; -let atom_def = fs.readFileSync(process.argv[2], "utf-8"); +const input = process.argv[2]; +if (input == null) { + console.error("usage: gen-atoms "); + process.exit(1); +} + +const atom_def = fs.readFileSync(input, "utf-8"); -let atom_lines = atom_def.split("\n"); -let new_lines = []; -let atom_names = []; +const atom_lines = atom_def.split("\n"); +const new_lines: string[] = []; +const atom_names: string[] = []; for (const atom_line of atom_lines) { - let atom = null; - let atom_name = null; + let atom: string | null = null; + let atom_name: string | null = null; - let match = atom_line.match(/^EJS_ATOM\((.*)\)$/); - let match2 = atom_line.match(/^EJS_ATOM2\((.*),(.*)\)$/); - let match3 = atom_line.match(/^EJS_ATOM2\(,(.*)\)$/); + const match = atom_line.match(/^EJS_ATOM\((.*)\)$/); + const match2 = atom_line.match(/^EJS_ATOM2\((.*),(.*)\)$/); + const match3 = atom_line.match(/^EJS_ATOM2\(,(.*)\)$/); if (match) { - atom = match[1]; - atom_name = match[1]; + atom = match[1] ?? ""; + atom_name = match[1] ?? ""; } else if (match2) { - atom = match2[1]; - atom_name = match2[2]; + atom = match2[1] ?? ""; + atom_name = match2[2] ?? ""; } else if (match3) { atom = ""; - atom_name = match3[1]; + atom_name = match3[1] ?? ""; } - if (atom === null) { + if (atom === null || atom_name === null) { new_lines.push(atom_line); continue; } @@ -36,7 +46,7 @@ for (const atom_line of atom_lines) { let line = `const jschar _ejs_ucs2_${atom_name}[] EJSVAL_ALIGNMENT = { `; for (let cn = 0, ce = atom.length; cn < ce; cn++) { const code = atom.charCodeAt(cn); - const hex = new Number(code).toString(16); + const hex = code.toString(16); if (code < 0x10) line += `0x000${hex}`; else if (code < 0x100) line += `0x00${hex}`; else if (code < 0x1000) line += `0x0${hex}`; @@ -58,7 +68,7 @@ for (const atom_line of atom_lines) { console.log(new_lines.join("\n")); console.log("void _ejs_init_static_strings() {"); -for (let atom of atom_names) { +for (const atom of atom_names) { console.log(` _ejs_primstring_${atom}.data.flat = (jschar*)_ejs_ucs2_${atom};`); console.log( ` _ejs_atom_${atom} = STRING_TO_EJSVAL((EJSPrimString*)&_ejs_primstring_${atom});` diff --git a/test/array-subclassing3.js b/test/array-subclassing3.js index 3b35633d..4da23948 100644 --- a/test/array-subclassing3.js +++ b/test/array-subclassing3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // Array.from from kangax class C extends Array {} diff --git a/test/array-subclassing4.js b/test/array-subclassing4.js index 4f871b23..fec187e9 100644 --- a/test/array-subclassing4.js +++ b/test/array-subclassing4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // Array.of from kangax class C extends Array {} diff --git a/test/array23.js b/test/array23.js index 2b559db6..998e3b64 100644 --- a/test/array23.js +++ b/test/array23.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var a = Array.of(7); console.log(a.toString()); diff --git a/test/array24.js b/test/array24.js index c9ccc8a0..021ffa79 100644 --- a/test/array24.js +++ b/test/array24.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var arr = [1, 7, 11, "hola", 13.69]; var res = arr.find(function (element, index, array) { diff --git a/test/array25.js b/test/array25.js index 27197e51..35cded0f 100644 --- a/test/array25.js +++ b/test/array25.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var arr = [1, 7, 11, "hola", 13.69]; var res = arr.findIndex(function (element, index, array) { diff --git a/test/array26.js b/test/array26.js index ac2f3d42..d171fb96 100644 --- a/test/array26.js +++ b/test/array26.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var obj = { length: 3, 0: "hola", 1: "world", 2: 3.14 }; diff --git a/test/array27.js b/test/array27.js index 04b63622..be8f1808 100644 --- a/test/array27.js +++ b/test/array27.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var arr = new Array("hola", "world", "lots", "of", "fun"); console.log(arr.toString()); diff --git a/test/array30.js b/test/array30.js index 46506a1a..e3a773c9 100644 --- a/test/array30.js +++ b/test/array30.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var arr = ["this", "is", "a", "dummy", "array"]; var iter; diff --git a/test/array31.js b/test/array31.js index 79654a41..afbd5ed2 100644 --- a/test/array31.js +++ b/test/array31.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // 'Stolen' from the Mozilla's developers docs. diff --git a/test/arrow1.js b/test/arrow1.js index 7a895266..bf96b926 100644 --- a/test/arrow1.js +++ b/test/arrow1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let sq1 = (x) => { return x * x; diff --git a/test/arrow2.js b/test/arrow2.js index 22bd0485..3ebae905 100644 --- a/test/arrow2.js +++ b/test/arrow2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function Multiplier(factor) { this.factor = factor; diff --git a/test/arrow3.js b/test/arrow3.js index c3eefbaa..c378320b 100644 --- a/test/arrow3.js +++ b/test/arrow3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // lexical "arguments" binding from kangax var f = (function () { diff --git a/test/class1.js b/test/class1.js index 0c268b03..f9c94c72 100644 --- a/test/class1.js +++ b/test/class1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm class TestClass { constructor() { diff --git a/test/class2.js b/test/class2.js index 1e4ea72e..8283c1ea 100644 --- a/test/class2.js +++ b/test/class2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm class SuperClass { constructor() { diff --git a/test/class3.js b/test/class3.js index 17577a72..9d090d87 100644 --- a/test/class3.js +++ b/test/class3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm class Supest { constructor(foo) { diff --git a/test/class4.js b/test/class4.js index d11fb01b..ed44b2a2 100644 --- a/test/class4.js +++ b/test/class4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // methods aren't enumerable from kangax class C { foo() {} diff --git a/test/class5.js b/test/class5.js index e1a5e083..f6d7ba61 100644 --- a/test/class5.js +++ b/test/class5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // implicit strict mode from kangax class C { diff --git a/test/class6.js b/test/class6.js index 0a091ec2..7d56daa9 100644 --- a/test/class6.js +++ b/test/class6.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm class C { foo() { console.log("hi"); diff --git a/test/closure3.js b/test/closure3.js index a5f2a53a..6b5cdd0a 100644 --- a/test/closure3.js +++ b/test/closure3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let a = 5; function b() { diff --git a/test/closure7.js b/test/closure7.js index 769f1fa2..6ecd030b 100644 --- a/test/closure7.js +++ b/test/closure7.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function a() { let x = 5; diff --git a/test/codepoint-eq1.js b/test/codepoint-eq1.js index 5e4d8671..63f8b664 100644 --- a/test/codepoint-eq1.js +++ b/test/codepoint-eq1.js @@ -1,2 +1,2 @@ -// generator: babel-node +// generator: esm console.log("\u{1d306}" == "\ud834\udf06"); diff --git a/test/computed-props1.js b/test/computed-props1.js index 973d4556..02786b94 100644 --- a/test/computed-props1.js +++ b/test/computed-props1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var x = "y"; console.log({ [x]: 1 }["y"] === 1); diff --git a/test/computed-props3.js b/test/computed-props3.js index fe34c633..02cf03c1 100644 --- a/test/computed-props3.js +++ b/test/computed-props3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var x = "y"; function foo() { diff --git a/test/const1.js b/test/const1.js index bb1b1062..c5495ca2 100644 --- a/test/const1.js +++ b/test/const1.js @@ -1,4 +1,4 @@ -// we disable generation here because babel-node errors out when we reassign i +// we disable generation here because node errors out when we reassign i // below. // generator: none // xfail: we permit assigning to const bindings diff --git a/test/defaultargs1.js b/test/defaultargs1.js index c43da8be..873717fb 100644 --- a/test/defaultargs1.js +++ b/test/defaultargs1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function foo(a = "hello") { console.log(a); diff --git a/test/defaultargs2.js b/test/defaultargs2.js index b018ec2a..0f69f78b 100644 --- a/test/defaultargs2.js +++ b/test/defaultargs2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function foo(b, a = "hello") { console.log(a); diff --git a/test/destructure1.js b/test/destructure1.js index 67ff837e..2c8af955 100644 --- a/test/destructure1.js +++ b/test/destructure1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function foo({ x, y }) { console.log(x + " + " + y); diff --git a/test/destructure2.js b/test/destructure2.js index 67fa564a..42eb2d4d 100644 --- a/test/destructure2.js +++ b/test/destructure2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let foo = [1, 2]; let [a, b] = foo; diff --git a/test/destructure3.js b/test/destructure3.js index 0ebb775a..d1dd0c62 100644 --- a/test/destructure3.js +++ b/test/destructure3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let { x, y } = { x: "hello", y: "world" }; diff --git a/test/destructure4.js b/test/destructure4.js index e9c3aea4..ab81bb40 100644 --- a/test/destructure4.js +++ b/test/destructure4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let a, b, c, d; [a, b] = ["hello", "world"]; diff --git a/test/eir-export1.js b/test/eir-export1.js index 90ed4dd4..894bd275 100644 --- a/test/eir-export1.js +++ b/test/eir-export1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // `export default class`, default+named import, and re-export import Counter, { K, mk } from "./eir-export1-lib"; export { mk as remk } from "./eir-export1-lib"; diff --git a/test/eir-toplevel1.js b/test/eir-toplevel1.js index 8c4a8362..239b8cc0 100644 --- a/test/eir-toplevel1.js +++ b/test/eir-toplevel1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // whole-module (toplevel-as-EIR) shapes: toplevel statements, captured // toplevel locals, loop envs at toplevel, imports and exports. runs and diff --git a/test/esprima-roundtrip1.js b/test/esprima-roundtrip1.js index f97aa4e4..e59370b9 100644 --- a/test/esprima-roundtrip1.js +++ b/test/esprima-roundtrip1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // skip-if: true // revisit the esprima tests now that we have the es6 modules diff --git a/test/esprima-roundtrip2.js b/test/esprima-roundtrip2.js index a420bd6f..fed6ada6 100644 --- a/test/esprima-roundtrip2.js +++ b/test/esprima-roundtrip2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // skip-if: true // revisit the esprima tests now that we have the es6 modules diff --git a/test/esprima1.js b/test/esprima1.js index 7edbcf77..128cb391 100644 --- a/test/esprima1.js +++ b/test/esprima1.js @@ -1,7 +1,8 @@ // generator: none -// baseline checked in: babel-node can't run the external-deps esprima-es6 -// ESM under babel-register (was silently unregenerable under the old -// harness too); the output is JSON.stringify of the AST, engine-neutral +// baseline checked in: the esm generator's transpile closure doesn't +// reach outside test/ (the ../external-deps esprima-es6 import; was +// silently unregenerable under babel-node and the old harness too); +// the output is JSON.stringify of the AST, engine-neutral // revisit the esprima tests now that we have the es6 modules import * as esprima from "../external-deps/esprima/esprima-es6"; diff --git a/test/for3.js b/test/for3.js index 242e28c5..b0e7bd80 100644 --- a/test/for3.js +++ b/test/for3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm for (var i = 0; i < 5; i++) { let i_ = i; diff --git a/test/for5.js b/test/for5.js index 7a6b6816..91e51933 100644 --- a/test/for5.js +++ b/test/for5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var a = Array(5); for (var i = 0; i < 5; i++) { diff --git a/test/for6.js b/test/for6.js index 5d93e42c..cb893c3f 100644 --- a/test/for6.js +++ b/test/for6.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var a = Array(5); for (let i = 0; i < 5; i++) { diff --git a/test/forof1.js b/test/forof1.js index f60153f4..01b9e3a6 100644 --- a/test/forof1.js +++ b/test/forof1.js @@ -1,3 +1,3 @@ -// generator: babel-node +// generator: esm for (var i of ["hello", "world"]) console.log(i); diff --git a/test/forof2.js b/test/forof2.js index c9a062db..78608b73 100644 --- a/test/forof2.js +++ b/test/forof2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function foo() {} foo.prototype[Symbol.iterator] = function () { diff --git a/test/function-overriding2.js b/test/function-overriding2.js index 9f028936..a5cbd731 100644 --- a/test/function-overriding2.js +++ b/test/function-overriding2.js @@ -1,4 +1,4 @@ -// babel-node doesn't hoist blocked scope functions +// node doesn't hoist block-scoped functions the way ejs does here // generator: none if (typeof console !== "undefined") var print = console.log; diff --git a/test/generator1.js b/test/generator1.js index da983423..87be8d0b 100644 --- a/test/generator1.js +++ b/test/generator1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "basic functionality" from kangax function* generator() { diff --git a/test/generator10.js b/test/generator10.js index 19f0cbcb..829c0114 100644 --- a/test/generator10.js +++ b/test/generator10.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "yield *, arrays" from kangax var iterator = (function* generator() { diff --git a/test/generator11.js b/test/generator11.js index c1f9cebe..f9e66647 100644 --- a/test/generator11.js +++ b/test/generator11.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "yield *, strings" from kangax diff --git a/test/generator12.js b/test/generator12.js index 98ceab29..f4cc2892 100644 --- a/test/generator12.js +++ b/test/generator12.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // skip-if: true // this test fails for stage1 but not for stage0. we need to add a way to disable tests just for particular stages diff --git a/test/generator13.js b/test/generator13.js index f30927dd..8667b838 100644 --- a/test/generator13.js +++ b/test/generator13.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "yield *, generic iterables" from kangax diff --git a/test/generator14.js b/test/generator14.js index c7a11613..8631dff9 100644 --- a/test/generator14.js +++ b/test/generator14.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "yield *, instances of iterables" from kangax diff --git a/test/generator15.js b/test/generator15.js index 06de9182..d6a76cb0 100644 --- a/test/generator15.js +++ b/test/generator15.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // xfail: generator support isn't 100% // "yield *, iterator closing" from kangax diff --git a/test/generator16.js b/test/generator16.js index 99370782..a4f60766 100644 --- a/test/generator16.js +++ b/test/generator16.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // xfail: generator support isn't 100% // "yield *, iterator closing via throw()" from kangax diff --git a/test/generator17.js b/test/generator17.js index 7812b074..2fd412ed 100644 --- a/test/generator17.js +++ b/test/generator17.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "shorthand generator methods" from kangax diff --git a/test/generator18.js b/test/generator18.js index 88cf33a7..66c53509 100644 --- a/test/generator18.js +++ b/test/generator18.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "string-keyed shorthand generator methods" from kangax var o = { diff --git a/test/generator19.js b/test/generator19.js index 75d83d21..c394d2f3 100644 --- a/test/generator19.js +++ b/test/generator19.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "computed shorthand generators" from kangax var garply = "generator"; diff --git a/test/generator2.js b/test/generator2.js index e3dc2129..eb11713a 100644 --- a/test/generator2.js +++ b/test/generator2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "generator function expressions" from kangax diff --git a/test/generator20.js b/test/generator20.js index ec6a2639..f287ad38 100644 --- a/test/generator20.js +++ b/test/generator20.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "shorthand generator methods, classes" from kangax diff --git a/test/generator21.js b/test/generator21.js index 7a01c4ce..ea3ca7f1 100644 --- a/test/generator21.js +++ b/test/generator21.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "computed shorthand generators, classes" diff --git a/test/generator3.js b/test/generator3.js index 72102965..36572f93 100644 --- a/test/generator3.js +++ b/test/generator3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "correct this binding" from kangax diff --git a/test/generator5.js b/test/generator5.js index 12d4430b..0c22e2fa 100644 --- a/test/generator5.js +++ b/test/generator5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // xfail: generator support isn't 100% // "sending" from kangax diff --git a/test/generator6.js b/test/generator6.js index 50a48103..91932a97 100644 --- a/test/generator6.js +++ b/test/generator6.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // xfail: generator support isn't 100% // "%GeneratorPrototype%" from kangax diff --git a/test/generator7.js b/test/generator7.js index 9a3f393d..9ba7d913 100644 --- a/test/generator7.js +++ b/test/generator7.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "%GeneratorPrototype%.throw" from kangax var passed = false; diff --git a/test/generator8.js b/test/generator8.js index 29460b96..5b577ab0 100644 --- a/test/generator8.js +++ b/test/generator8.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "%GeneratorPrototype%.return" from kangax diff --git a/test/generator9.js b/test/generator9.js index e1d81dd1..500e48cd 100644 --- a/test/generator9.js +++ b/test/generator9.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "yield operator precedence" from kangax var passed; diff --git a/test/harness-console-shim.js b/test/harness-console-shim.js index 6620ab72..6f3fbfba 100644 --- a/test/harness-console-shim.js +++ b/test/harness-console-shim.js @@ -9,7 +9,8 @@ // // Rules for editing this file: // - conservative ES5 only: it must compile under ejs and run under -// node AND babel-node byte-identically; +// node byte-identically (including from the esm generator's +// transpile dir, where it rides along unconverted); // - no engine-provided formatting (util.inspect, toISOString, ...); // anything observable must be computed here, from values; // - it must not rely on ejs-specific or node-specific behavior: any diff --git a/test/harness-run.js b/test/harness-run.js index c09f732a..0de3fc3d 100644 --- a/test/harness-run.js +++ b/test/harness-run.js @@ -1,8 +1,9 @@ // node-side driver for expected-output generation (runtime-P3). -// Usage: node|babel-node harness-run.js +// Usage: node harness-run.js // Installs the harness console shim, then runs the test — the exact -// mirror of the import wrapper tester.js compiles on the ejs side. -// Under babel-node the register hook transpiles the required test, which -// is how import-syntax tests generate. +// mirror of the import wrapper tester.ts compiles on the ejs side. +// Import-syntax tests (`// generator: esm`) run through this too: the +// tester tsc-transpiles them into a scratch dir (a copy of this file +// and the shim ride along) — see generateExpectedEsm in tester.ts. require("./harness-console-shim.js"); require(require("path").resolve(process.argv[2])); diff --git a/test/map-subclassing1.js b/test/map-subclassing1.js index ec4f5ba7..5c5a77ea 100644 --- a/test/map-subclassing1.js +++ b/test/map-subclassing1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "Map is subclassable" from kangax function test() { var key = {}; diff --git a/test/map2.js b/test/map2.js index 995d81eb..204580ba 100644 --- a/test/map2.js +++ b/test/map2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var m = new Map(); m.set("__proto__", 5); diff --git a/test/map3.js b/test/map3.js index 64c9a73b..f13c921d 100644 --- a/test/map3.js +++ b/test/map3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var arr = [ ["usa", "hamburger"], diff --git a/test/map4.js b/test/map4.js index 95901add..45e5dada 100644 --- a/test/map4.js +++ b/test/map4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var m = new Map(); m.set("one", "uno"); diff --git a/test/map5.js b/test/map5.js index 375b740a..11684720 100644 --- a/test/map5.js +++ b/test/map5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var map = new Map(); map.set(+0, "foo"); diff --git a/test/math1.js b/test/math1.js index c32cb398..508a3d91 100644 --- a/test/math1.js +++ b/test/math1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // xfail: XXX // new ES6 math functions diff --git a/test/modules1.js b/test/modules1.js index 6e573437..441eecb8 100644 --- a/test/modules1.js +++ b/test/modules1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm import { methodInFoo1 } from "./modules1/foo1"; import { methodInFoo2 as mfoo2 } from "./modules1/foo2"; diff --git a/test/modules3.js b/test/modules3.js index 4852688c..5539dc1a 100644 --- a/test/modules3.js +++ b/test/modules3.js @@ -1,3 +1,3 @@ -// generator: babel-node +// generator: esm import "./modules1/foo1"; diff --git a/test/modules4.js b/test/modules4.js index 364238db..0785569f 100644 --- a/test/modules4.js +++ b/test/modules4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm import * as foo4 from "./modules1/foo4"; import defaultFoo4 from "./modules1/foo4"; diff --git a/test/modules5.js b/test/modules5.js index ba9c05db..1360ba59 100644 --- a/test/modules5.js +++ b/test/modules5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm import { method2 } from "./modules1/foo5"; method2(); diff --git a/test/modules6.js b/test/modules6.js index 9ba41b15..07a9503f 100644 --- a/test/modules6.js +++ b/test/modules6.js @@ -1,3 +1,3 @@ -// generator: babel-node +// generator: esm import "./modules6-dep"; diff --git a/test/object-assign1.js b/test/object-assign1.js index b743c6e6..f0300fd3 100644 --- a/test/object-assign1.js +++ b/test/object-assign1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let from1 = Object.create(null); from1.prop = 5; diff --git a/test/object-setPrototypeOf1.js b/test/object-setPrototypeOf1.js index 37dbb371..e0e84d56 100644 --- a/test/object-setPrototypeOf1.js +++ b/test/object-setPrototypeOf1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var myproto = {}; var obj = Object.create(null); diff --git a/test/object16.js b/test/object16.js index 6c5a63e6..082e91ac 100644 --- a/test/object16.js +++ b/test/object16.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let i = 0; let foo = { diff --git a/test/object17.js b/test/object17.js index e1f554c4..5304dd0b 100644 --- a/test/object17.js +++ b/test/object17.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // "computed shorthand methods" from kangax function test() { var x = "y"; diff --git a/test/object18.js b/test/object18.js index 7a360212..f88164c2 100644 --- a/test/object18.js +++ b/test/object18.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function test() { var x = "y", diff --git a/test/promise1.js b/test/promise1.js index 383845a2..787d4622 100644 --- a/test/promise1.js +++ b/test/promise1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // skip-if: runloop_impl == 'noop' Promise.resolve(5).then((value) => { diff --git a/test/promise2.js b/test/promise2.js index 3d5bdbe4..c4b68f82 100644 --- a/test/promise2.js +++ b/test/promise2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // skip-if: runloop_impl == 'noop' Promise.resolve(5) diff --git a/test/reflect-get1.js b/test/reflect-get1.js index 46d9e33a..4c21e5f7 100644 --- a/test/reflect-get1.js +++ b/test/reflect-get1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var o = { a: 5 }; var fooReceiver = { foo: 10 }; diff --git a/test/reflect-isExtensible1.js b/test/reflect-isExtensible1.js index b39ee5e6..8451ef8f 100644 --- a/test/reflect-isExtensible1.js +++ b/test/reflect-isExtensible1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function test(l) { try { diff --git a/test/reflect-set1.js b/test/reflect-set1.js index 124be670..8362746e 100644 --- a/test/reflect-set1.js +++ b/test/reflect-set1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var o = {}; var fooReceiver = { foo: "hello" }; diff --git a/test/reflect-setPrototypeOf1.js b/test/reflect-setPrototypeOf1.js index 367090ba..cf02be7b 100644 --- a/test/reflect-setPrototypeOf1.js +++ b/test/reflect-setPrototypeOf1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function test(l) { try { diff --git a/test/reflect1.js b/test/reflect1.js index 056d3cb9..51bb8568 100644 --- a/test/reflect1.js +++ b/test/reflect1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function test() { var i, diff --git a/test/set1.js b/test/set1.js index 22d44e87..fa0ff080 100644 --- a/test/set1.js +++ b/test/set1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var mySet = new Set(); diff --git a/test/set2.js b/test/set2.js index f1e180a5..3ed371d3 100644 --- a/test/set2.js +++ b/test/set2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var arr = [1, 4, 6, "hallo", "there"]; var s = new Set(arr); diff --git a/test/set3.js b/test/set3.js index 9c25ae49..d363fe08 100644 --- a/test/set3.js +++ b/test/set3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var s = new Set(); s.add("lasagna"); diff --git a/test/set4.js b/test/set4.js index 8e28377d..e9a19d18 100644 --- a/test/set4.js +++ b/test/set4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var s = new Set(); s.add("lasagna"); diff --git a/test/set5.js b/test/set5.js index 838ba950..b435c8c7 100644 --- a/test/set5.js +++ b/test/set5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var set = new Set(); set.add(+0); diff --git a/test/shorthand-method1.js b/test/shorthand-method1.js index c5ca48e0..73d9c908 100644 --- a/test/shorthand-method1.js +++ b/test/shorthand-method1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm console.log( { diff --git a/test/shorthand-prop1.js b/test/shorthand-prop1.js index e6d79216..8ba58de9 100644 --- a/test/shorthand-prop1.js +++ b/test/shorthand-prop1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var hello = "world"; var obj = { hello }; diff --git a/test/spread1.js b/test/spread1.js index b2acff3d..309b1711 100644 --- a/test/spread1.js +++ b/test/spread1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function foo(...args) { console.log(args.length); diff --git a/test/spread2.js b/test/spread2.js index efb4912e..82422be4 100644 --- a/test/spread2.js +++ b/test/spread2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // this file should fail with a syntax error due to the arguments usage function foo(...args) { diff --git a/test/spread3.js b/test/spread3.js index 6e069a7b..f56e6381 100644 --- a/test/spread3.js +++ b/test/spread3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function foo(a, b, c) { console.log(a); diff --git a/test/spread4.js b/test/spread4.js index 57be2a6d..f3752761 100644 --- a/test/spread4.js +++ b/test/spread4.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // testing closing over rest parameters diff --git a/test/spread5.js b/test/spread5.js index ac95a84c..48239e52 100644 --- a/test/spread5.js +++ b/test/spread5.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm console.log([1, ...[2, 3, 4], 5][3]); console.log([...[1, 2, 3]][2]); diff --git a/test/spread6.js b/test/spread6.js index dbdf714f..0ecadd5f 100644 --- a/test/spread6.js +++ b/test/spread6.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function Foo() {} Foo.prototype[Symbol.iterator] = function () { diff --git a/test/spread7.js b/test/spread7.js index fdb3955e..019f5225 100644 --- a/test/spread7.js +++ b/test/spread7.js @@ -1,3 +1,3 @@ -// generator: babel-node +// generator: esm for (var x of [...[1, 2, 3, 4, 5, 8, 7]]) console.log(x); diff --git a/test/string-codePointAt1.js b/test/string-codePointAt1.js index 96ccc817..de7c1dab 100644 --- a/test/string-codePointAt1.js +++ b/test/string-codePointAt1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm console.log("ABC".codePointAt(1)); // 66 console.log("\uD800\uDC00".codePointAt(0)); // 65536 diff --git a/test/string-contains1.js b/test/string-contains1.js index 4fca0107..7f3b9666 100644 --- a/test/string-contains1.js +++ b/test/string-contains1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var str = "To be, or not to be, that is the question."; diff --git a/test/string-endsWith1.js b/test/string-endsWith1.js index 53edc2d3..5689c51b 100644 --- a/test/string-endsWith1.js +++ b/test/string-endsWith1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var str = "To be, or not to be, that is the question."; diff --git a/test/string-iter1.js b/test/string-iter1.js index 61abfe77..786677dd 100644 --- a/test/string-iter1.js +++ b/test/string-iter1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var s = "hallo dudes"; diff --git a/test/string-raw1.js b/test/string-raw1.js index f925594d..de70ea3e 100644 --- a/test/string-raw1.js +++ b/test/string-raw1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm let world = "world"; diff --git a/test/string-repeat1.js b/test/string-repeat1.js index dabe6849..ebadfb80 100644 --- a/test/string-repeat1.js +++ b/test/string-repeat1.js @@ -1,4 +1,4 @@ -//generator: babel-node +//generator: esm try { console.log("abc".repeat(-1)); // RangeError diff --git a/test/string-startsWith1.js b/test/string-startsWith1.js index ead27730..a2657da4 100644 --- a/test/string-startsWith1.js +++ b/test/string-startsWith1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var str = "To be, or not to be, that is the question."; diff --git a/test/symbol-iterator1.js b/test/symbol-iterator1.js index b7e968e6..66c2e365 100644 --- a/test/symbol-iterator1.js +++ b/test/symbol-iterator1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm function test() { var a = 0, diff --git a/test/symbol-tostringtag1.js b/test/symbol-tostringtag1.js index 0e66487e..79a2352f 100644 --- a/test/symbol-tostringtag1.js +++ b/test/symbol-tostringtag1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var a = {}; a[Symbol.toStringTag] = "foo"; diff --git a/test/symbol-tostringtag2.js b/test/symbol-tostringtag2.js index cb0f65f7..a150fb93 100644 --- a/test/symbol-tostringtag2.js +++ b/test/symbol-tostringtag2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm class Foo { get [Symbol.toStringTag]() { diff --git a/test/symbol2.js b/test/symbol2.js index b43418d8..5d972680 100644 --- a/test/symbol2.js +++ b/test/symbol2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // from kangax's table diff --git a/test/template-string1.js b/test/template-string1.js index a085fc7c..a94be1ff 100644 --- a/test/template-string1.js +++ b/test/template-string1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var mundo = "world"; diff --git a/test/tester-deps.d.ts b/test/tester-deps.d.ts new file mode 100644 index 00000000..73eb2deb --- /dev/null +++ b/test/tester-deps.d.ts @@ -0,0 +1,13 @@ +// Hand-written surface declarations for tester.ts's untyped deps. +// (glob and colors ship their own types; temp does not.) + +declare module "temp" { + interface OpenFileInfo { + path: string; + fd: number; + } + export function open( + affixes: string, + callback: (err: Error | null, info: OpenFileInfo) => void + ): void; +} diff --git a/test/tester.js b/test/tester.ts similarity index 61% rename from test/tester.js rename to test/tester.ts index 73ecde3a..f5389551 100644 --- a/test/tester.js +++ b/test/tester.ts @@ -1,69 +1,76 @@ -#!/usr/bin/env node - -const path = require("path"), - os = require("os"), - fs = require("fs"), - { globSync } = require("glob"), - child_process = require("child_process"), - spawn = child_process.spawn, - exec = child_process.exec, - colors = require("colors/safe"), - temp = require("temp"); +// The test-suite runner. Compiled to tester.js by tsc (see +// tsconfig.json in this directory); buck-test-stage.sh does that when +// it stages the test tree, so the staged copy always runs from these +// sources. + +import * as path from "path"; +import * as os from "os"; +import * as fs from "fs"; +import { globSync } from "glob"; +import * as child_process from "child_process"; +import * as colors from "colors/safe"; +import * as temp from "temp"; + +const spawn = child_process.spawn; +const exec = child_process.exec; + +type Colorizer = (s: string) => string; // maps from test_name -> properties as defined in the test file -const skip_ifs = Object.create(null); // `// skip-if: ...` an expression, evaled. if true, ignore the test -const xfails = Object.create(null); // `// xfail: ...` test is expected to fail. ... is the reason -const generators = Object.create(null); // `// generator: ...` ... is the executable used to generate expected output +const skip_ifs: Record = Object.create(null); // `// skip-if: ...` an expression, evaled. if true, ignore the test +const xfails: Record = Object.create(null); // `// xfail: ...` test is expected to fail. ... is the reason +const generators: Record = Object.create(null); // `// generator: ...` how expected output is generated (node | esm | none) -const expected_names = Object.create(null); -const expected_stdouts = Object.create(null); -const stdouts = Object.create(null); +const expected_names: Record = Object.create(null); +const expected_stdouts: Record = Object.create(null); +const stdouts: Record = Object.create(null); -const failed_tests = []; +const failed_tests: string[] = []; // index here is the stage #. 0 = run it under node, 1 = run it with stage1, 2 = run it with stage2 const compilers = ["../ejs", "../ejs.exe.stage1", "../ejs.exe.stage2", "../ejs.exe.stage3"]; -let runloop_impl = require("../lib/generated/lib/host-config.js").RUNLOOP_IMPL; - -const running_in_ci = process.env["CIRCLE_BUILD_NUM"] != null; +// eslint-disable-next-line @typescript-eslint/no-var-requires +const runloop_impl: string = require("../lib/generated/lib/host-config.js").RUNLOOP_IMPL; +// referenced from `// skip-if:` expressions, which eval in this scope +void runloop_impl; // baselines must not depend on the timezone of the machine that generated // them: local-time Date construction (date3.js) feeds the value-based // serializer's UTC rendering, so generation and test runs both pin UTC process.env.TZ = "UTC"; -let platform_to_test = null; +let platform_to_test: string | null = null; let stage_to_run = 0; let test_threads = 4; -const result_types = { - fail: { str: "FAIL", colorizer: colors.red.bold }, +// colors' chained styles (red.bold) aren't in its shipped types +const red_bold = (colors.red as unknown as { bold: Colorizer }).bold; + +type ResultKind = "fail" | "xfail" | "xpass" | "pass"; + +const result_types: Record = { + fail: { str: "FAIL", colorizer: red_bold }, xfail: { str: "xfail", colorizer: colors.yellow }, - xpass: { str: "ERROR", colorizer: colors.red.bold }, + xpass: { str: "ERROR", colorizer: red_bold }, pass: { str: "pass", colorizer: colors.green }, }; -const fail_str = "fail"; -const xfail_str = "xfail"; -const xpass_str = "xpass"; -const pass_str = "pass"; - -function timerStart() { +function timerStart(): [number, number] { return process.hrtime(); } // from http://stackoverflow.com/questions/10617070/how-to-measure-execution-time-of-javascript-code-with-callbacks -function getElapsed(start_time) { +function getElapsed(start_time: [number, number]): string { let elapsed = process.hrtime(start_time); let elapsed_ms = elapsed[0] * 1000 + elapsed[1] / 1000000; return elapsed_ms.toFixed(2); // 2 decimal places } -function makeJustifierColumn(columns, leftJustify) { +function makeJustifierColumn(columns: number, leftJustify: boolean) { let spaces = Array(columns).join(" "); - return function (str, transformer) { + return function (str: string, transformer?: Colorizer): string { let padding = spaces.substr(0, columns - str.length); if (transformer) str = transformer(str); if (leftJustify) return str + padding; @@ -72,7 +79,7 @@ function makeJustifierColumn(columns, leftJustify) { } function makeNoopColumn() { - return function (x) { + return function (x: string): string { return x; }; } @@ -82,7 +89,12 @@ const resultColumn = makeJustifierColumn(5, true); // maximum length of fail/xfa const timeColumn = makeJustifierColumn(11, false); // enough to hold "XXXXX.XX ms". const errStringColumn = makeNoopColumn(); -function writeOutput(test_name, result_type, elapsed, err_string) { +function writeOutput( + test_name: string, + result_type: ResultKind, + elapsed: string | null, + err_string?: string +): void { let elapsed_str = elapsed == null ? "?" : elapsed; console.log( @@ -93,30 +105,41 @@ function writeOutput(test_name, result_type, elapsed, err_string) { ); } -function testFailure(test_name, err_string, elapsed, additional) { - writeOutput(test_name, fail_str, elapsed, "(" + err_string + ")"); +function testFailure( + test_name: string, + err_string: string, + elapsed: string | null, + additional?: string +): void { + writeOutput(test_name, "fail", elapsed, "(" + err_string + ")"); console.log(additional); failed_tests.push(test_name); } -function testUnexpectedPass(test_name, elapsed) { - writeOutput(test_name, xpass_str, elapsed, "(unexpected pass)"); +function testUnexpectedPass(test_name: string, elapsed: string | null): void { + writeOutput(test_name, "xpass", elapsed, "(unexpected pass)"); failed_tests.push(test_name); } -function testFailed(test_name, err_string, elapsed, additional) { - if (xfails[test_name]) { - writeOutput(test_name, xfail_str, elapsed, "(" + xfails[test_name] + ")"); +function testFailed( + test_name: string, + err_string: string, + elapsed: string | null, + additional?: string +): void { + const xfail = xfails[test_name]; + if (xfail) { + writeOutput(test_name, "xfail", elapsed, "(" + xfail + ")"); } else { testFailure(test_name, err_string, elapsed, additional); } } -function checkStdout(test_name, elapsed, cb) { +function checkStdout(test_name: string, elapsed: string, cb: () => void): void { if (stdouts[test_name] != expected_stdouts[test_name]) { temp.open("ejstest-received", function (err, info) { - fs.writeSync(info.fd, stdouts[test_name]); - fs.close(info.fd, function (err) { + fs.writeSync(info.fd, stdouts[test_name] ?? ""); + fs.close(info.fd, function () { exec( "/usr/bin/diff -u " + expected_names[test_name] + " " + info.path, function (err, stdout) { @@ -130,7 +153,7 @@ function checkStdout(test_name, elapsed, cb) { if (xfails[test_name]) { testUnexpectedPass(test_name, elapsed); } else { - writeOutput(test_name, pass_str, elapsed); + writeOutput(test_name, "pass", elapsed); } setTimeout(cb, 0); @@ -143,7 +166,7 @@ function checkStdout(test_name, elapsed, cb) { const harness_shim = "harness-console-shim.js"; const harness_run = "harness-run.js"; -function shouldGenerateExpectedOutput(test_file, expected_file) { +function shouldGenerateExpectedOutput(test_file: string, expected_file: string): boolean { try { let expected_mtime = fs.statSync(expected_file).mtime.getTime(); // the harness serializer contributes to the expected output too — @@ -161,12 +184,100 @@ function shouldGenerateExpectedOutput(test_file, expected_file) { } } -function processOneTest(gen_expected, test, cb) { +// import-syntax tests (`// generator: esm`) can't run under plain node: +// their relative import specifiers are extensionless (the compiler's +// gather-imports requires import syntax, node's ESM loader requires +// extensions). tsc transpiles the test and its relative-import closure +// to CommonJS in a scratch dir (compiler-P2; babel-node's require hook +// did this until then) and node runs the transpiled copy through the +// same harness-run driver. +function relativeImportClosure(test: string): string[] { + const seen = new Set(); + const files: string[] = []; + const visit = function (file: string): void { + const resolved = path.resolve(file); + if (seen.has(resolved)) return; + seen.add(resolved); + files.push(resolved); + const src = fs.readFileSync(resolved, "utf-8"); + const import_re = /^\s*(?:import|export)\b[^;]*?["']([^"']+)["']/gm; + let m: RegExpExecArray | null; + while ((m = import_re.exec(src)) !== null) { + const spec = m[1]; + if (spec == null || spec[0] !== ".") continue; + let dep = path.join(path.dirname(resolved), spec); + if (!dep.endsWith(".js")) { + // extensionless specifiers resolve like the compiler's: + // file first, then directory/index.js (modules6) + if (fs.existsSync(dep + ".js")) dep += ".js"; + else dep = path.join(dep, "index.js"); + } + visit(dep); + } + }; + visit(test); + return files; +} + +const tsc_bin = path.join(path.dirname(require.resolve("typescript/package.json")), "bin", "tsc"); + +function generateExpectedEsm( + test: string, + expected_name: string, + cb: (err?: Error | null) => void +): void { + const gen_tmpdir = fs.mkdtempSync(path.join(os.tmpdir(), "ejstest-esm-")); + const cleanup = function (): void { + try { + fs.rmSync(gen_tmpdir, { recursive: true, force: true }); + } catch (e) {} + }; + const closure = relativeImportClosure(test) + .map((f) => '"' + f + '"') + .join(" "); + exec( + 'node "' + + tsc_bin + + '" --ignoreConfig --allowJs --target es2016 --module commonjs' + + ' --esModuleInterop --outDir "' + + gen_tmpdir + + '" ' + + closure, + function (err) { + if (err) { + cleanup(); + cb(err); + return; + } + // the harness files are plain ES5 CommonJS — they ride along + // unconverted so generation runs the byte-exact serializer + for (const f of [harness_shim, harness_run]) { + fs.copyFileSync(f, path.join(gen_tmpdir, f)); + } + const transpiled = path.join(gen_tmpdir, path.basename(test)); + exec( + 'node "' + + path.join(gen_tmpdir, harness_run) + + '" "' + + transpiled + + '" > ' + + expected_name, + function (err) { + cleanup(); + cb(err); + } + ); + } + ); +} + +function processOneTest(gen_expected: boolean, test: string, cb: (err?: Error | null) => void): void { let test_name = path.basename(test); //if (!gen_expected) console.log("processOneTest(" + gen_expected + ", " + test_name + ")"); - if (skip_ifs[test_name]) { - if (eval(skip_ifs[test_name])) { + const skip_if = skip_ifs[test_name]; + if (skip_if) { + if (eval(skip_if)) { //console.log("skipping " + test_name); setTimeout(cb, 0); return; @@ -183,19 +294,24 @@ function processOneTest(gen_expected, test, cb) { if (should_generate && generator !== "none") { console.log("generating expected output for " + test_name + " using " + generator); - exec(generator + " " + harness_run + " " + test + " > " + expected_name, function (err, stdout) { + const generated = function (err?: Error | null): void { if (err) { cb(err); return; } expected_stdouts[test_name] = fs.readFileSync(expected_name).toString(); cb(); - }); + }; + if (generator === "esm") { + generateExpectedEsm(test, expected_name, generated); + } else { + exec(generator + " " + harness_run + " " + test + " > " + expected_name, generated); + } } else { try { expected_stdouts[test_name] = fs.readFileSync(expected_name).toString(); } catch (e) { - setTimeout(() => cb(e), 0); + setTimeout(() => cb(e as Error), 0); return; } setTimeout(cb, 0); @@ -213,14 +329,14 @@ function processOneTest(gen_expected, test, cb) { // generated wrapper that imports the console shim, then the // test — the mirror of harness-run.js on the node side let compile_target = test; - let output_args = []; - let wrapper_name = null; + let output_args: string[] = []; + let wrapper_name: string | null = null; if (generators[test_name] !== "none") { wrapper_name = ".__wrap__." + test_name; const spec = "./" + test_name.replace(/\.js$/, ""); fs.writeFileSync( wrapper_name, - "// generated by tester.js (value-based harness); deleted after compile\n" + + "// generated by tester.ts (value-based harness); deleted after compile\n" + 'import "./' + harness_shim.replace(/\.js$/, "") + '";\n' + 'import "' + spec + '";\n' ); @@ -233,7 +349,7 @@ function processOneTest(gen_expected, test, cb) { // concurrent compiles sharing a TMPDIR would clobber each // other's shim .bc/.o const compile_tmpdir = fs.mkdtempSync(path.join(os.tmpdir(), "ejstest-compile-")); - const removeWrapper = function () { + const removeWrapper = function (): void { if (wrapper_name != null) { try { fs.unlinkSync(wrapper_name); @@ -244,8 +360,10 @@ function processOneTest(gen_expected, test, cb) { fs.rmSync(compile_tmpdir, { recursive: true, force: true }); } catch (e) {} }; + const compiler = compilers[stage_to_run]; + if (compiler == null) throw new Error("bad stage " + stage_to_run); const ccomp = spawn( - compilers[stage_to_run], + compiler, platform_target.concat(extra_flags).concat(output_args).concat([ "--srcdir", "--moduledir", @@ -256,7 +374,7 @@ function processOneTest(gen_expected, test, cb) { ]), { env: Object.assign({}, process.env, { TMPDIR: compile_tmpdir }) } ); - ccomp.on("exit", function (code, errstring) { + ccomp.on("exit", function (code) { removeWrapper(); if (code !== 0) { const elapsed = getElapsed(start); @@ -265,7 +383,6 @@ function processOneTest(gen_expected, test, cb) { return; } // XXX check code to make sure we were successful? - let env; if (platform_to_test === "sim") { process.env["EJS_FORCE_STDOUT"] = "1"; process.env["DYLD_FRAMEWORK_PATH"] = @@ -276,26 +393,23 @@ function processOneTest(gen_expected, test, cb) { const cexec = spawn("./" + test + ".exe"); let test_stdout = ""; - let test_stderr = ""; - cexec.on("close", function (code, errstring) { + cexec.on("close", function () { stdouts[test_name] = test_stdout; // XXX check code to make sure we were successful? - var elapsed = getElapsed(start); + const elapsed = getElapsed(start); checkStdout(test_name, elapsed, cb); }); cexec.on("error", function (err) { - var elapsed = getElapsed(start); + const elapsed = getElapsed(start); testFailed(test_name, err.toString(), elapsed); cb(); }); cexec.stdout.on("data", function (msg) { test_stdout += msg; }); - cexec.stderr.on("data", function (msg) { - test_stderr += msg; - }); + cexec.stderr.on("data", function () {}); }); ccomp.on("error", function (err) { removeWrapper(); @@ -312,7 +426,11 @@ function processOneTest(gen_expected, test, cb) { } } -function processTests(gen_expected, tests, cb) { +function processTests( + gen_expected: boolean, + tests: string[], + cb: (err?: Error | null) => void +): void { // (the old scheduler seeded i=test_threads but incremented i before // reading tests[i] in the callback — the test at index test_threads // was silently skipped in BOTH passes, which is how weakmap2.js ran @@ -320,9 +438,10 @@ function processTests(gen_expected, tests, cb) { let next = 0; let num_outstanding = 0; - const launch = function () { + const launch = function (): void { while (num_outstanding < test_threads && next < tests.length) { const t = tests[next++]; + if (t == null) continue; num_outstanding++; processOneTest(gen_expected, t, function () { num_outstanding--; @@ -337,7 +456,7 @@ function processTests(gen_expected, tests, cb) { launch(); } -function readTest(test) { +function readTest(test: string): void { const test_name = path.basename(test); const contents = fs.readFileSync(test).toString(); const lines = contents.split("\n"); @@ -345,7 +464,7 @@ function readTest(test) { // read the comments at the start, and pull out useful info for (let i = 0, e = lines.length; i < e; i++) { let line = lines[i]; - if (line.indexOf("//") !== 0) { + if (line == null || line.indexOf("//") !== 0) { return; } @@ -373,14 +492,15 @@ function readTest(test) { const args = process.argv.slice(2); -let test_to_run = null; +let test_to_run: string | null = null; if (args[0] == "-p") { args.shift(); - if (args.length < 1) { + const p = args.shift(); + if (p == null) { throw new Error("-p requires an argument [osx, sim]"); } - platform_to_test = args.shift(); + platform_to_test = p; if (platform_to_test !== "osx" && platform_to_test !== "sim") { throw new Error("-p requires an argument [osx, sim]"); } @@ -388,19 +508,21 @@ if (args[0] == "-p") { if (args[0] == "-s") { args.shift(); - if (args.length < 1) throw new Error("-s requires an argument between 0 and 2"); - stage_to_run = parseInt(args.shift()); - if (stage_to_run < 0 && stage_to_run > 2) - throw new Error("-s requires an argument between 0 and 2"); + const s = args.shift(); + if (s == null) throw new Error("-s requires an argument between 0 and 3"); + stage_to_run = parseInt(s); + if (!(stage_to_run >= 0 && stage_to_run < compilers.length)) + throw new Error("-s requires an argument between 0 and 3"); } if (args[0] == "-t") { args.shift(); - if (args.length < 1) throw new Error("-t requires an argument (the test file to run)"); - test_to_run = args.shift(); + const t = args.shift(); + if (t == null) throw new Error("-t requires an argument (the test file to run)"); + test_to_run = t; test_threads = 1; // XXX workaround for a bug, but we also only need 1 thread when we're running 1 test } -function runTests(tests) { +function runTests(tests: string[]): void { tests.forEach(readTest); if (tests.length == 1) @@ -431,7 +553,7 @@ function runTests(tests) { } processTests(false, tests, function () { const run_failed = failed_tests.length > 0; - if (run_failed > 0) { + if (run_failed) { console.log(); console.log(testColumn(failed_tests.length + " failed tests")); console.log(testColumn("================")); diff --git a/test/tsconfig.json b/test/tsconfig.json new file mode 100644 index 00000000..c22cfe08 --- /dev/null +++ b/test/tsconfig.json @@ -0,0 +1,21 @@ +{ + // tester.ts (the suite runner) — compiled to tester.js in place by + // buck-test-stage.sh when the test tree is staged. Same strict + // family as the root tsconfig, but CommonJS output so plain node + // can run it. Hand-run: node ../node_modules/typescript/bin/tsc -p . + "compilerOptions": { + "strict": true, + "noUncheckedIndexedAccess": true, + "noImplicitOverride": true, + "noEmitOnError": true, + "target": "es2016", + "module": "commonjs", + "esModuleInterop": true, + // glob's path-scurry .d.ts trips over @types/node 26 (Dirent + // gained parentPath); their problem, not ours + "skipLibCheck": true, + "types": ["node"], + "outDir": "." + }, + "files": ["tester.ts", "tester-deps.d.ts"] +} diff --git a/test/typedarray8.js b/test/typedarray8.js index e2d86ef4..5ca2aed0 100644 --- a/test/typedarray8.js +++ b/test/typedarray8.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm var buffer = new ArrayBuffer(8); var uint8 = new Uint8Array(buffer); diff --git a/test/weakmap1.js b/test/weakmap1.js index a2589f96..687d9e7f 100644 --- a/test/weakmap1.js +++ b/test/weakmap1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // adapted from kangax's tests diff --git a/test/weakmap2.js b/test/weakmap2.js index e7c6ff3a..d7d4abd8 100644 --- a/test/weakmap2.js +++ b/test/weakmap2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // adapted from kangax's tests var key1 = {}; diff --git a/test/weakmap3.js b/test/weakmap3.js index d818319c..ac1d5adb 100644 --- a/test/weakmap3.js +++ b/test/weakmap3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // adapted from kangax's tests diff --git a/test/weakset1.js b/test/weakset1.js index da23f0ac..d417cba9 100644 --- a/test/weakset1.js +++ b/test/weakset1.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // adapted from kangax's tests diff --git a/test/weakset2.js b/test/weakset2.js index 29bcb3a6..5976387f 100644 --- a/test/weakset2.js +++ b/test/weakset2.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // adapted from kangax's tests diff --git a/test/weakset3.js b/test/weakset3.js index 27ef6fe1..c044e1f6 100644 --- a/test/weakset3.js +++ b/test/weakset3.js @@ -1,4 +1,4 @@ -// generator: babel-node +// generator: esm // adapted from kangax's tests diff --git a/tsconfig.json b/tsconfig.json index 2a65d270..68c36535 100644 --- a/tsconfig.json +++ b/tsconfig.json @@ -12,5 +12,5 @@ "types": ["node"], "noEmit": true }, - "include": ["ejs-es6.ts", "lib/**/*.ts"] + "include": ["ejs-es6.ts", "lib/**/*.ts", "runtime/gen-atoms.ts"] } From 2065d8a1fd5d688255ab98ecfd9afec8f6f30128 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Wed, 29 Jul 2026 22:52:28 -0700 Subject: [PATCH 134/146] =?UTF-8?q?eir:=20compiler-P5=20(P7.5)=20=E2=80=94?= =?UTF-8?q?=20clang-style=20pass=20configuration?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The optimizer's configuration surface moves from ~20 EJS_* env vars to a gcc/clang-style flag surface backed by one registry table (lib/pass-config.ts): canonical pass name -> config field -> default at each -O level -> help text, with --help and --print-passes generated from it. Passes read the per-run snapshot via passes(), never process.env. Suites: -O0 straight lowering; -O1 the cheap intra-function tier (cleanup, slot CSE, the sinks); -O2 the full pre-P5 default pipeline, byte-for-byte; -O3 = -O2 on the EIR side with LLVM default (-fllvm-opt= decouples the LLVM level). -f/-fno- apply after the suite in command-line order, last-wins. Every EJS_NO_X maps 1:1 to -fno-; EJS_EIR_LOWTIER becomes -flowtier; the env reads are deleted (old spellings inert). EJS_FLAGS — tokenized as extra argv, applied last, -O/-f only — is the single env escape for harnesses that don't thread driver flags. Gate before deletion: 35/35 env≡flag A/B pairs byte-identical on one binary (EIR dumps; .ll-level for the emit tier and eir-opt), and default-config dumps byte-identical to a HEAD-built compiler for both flag-off and --types compiles; re-verified after deletion. Consumers: lib/eir/tests.ts uses withPassConfig() instead of env mutation; buck-test-lowtier.sh passes -flowtier. Gates: tsc clean; test-eir 216 pass + the same 11 compiler-P1.1 pins; lowtier e2e green; matrix stage0-3 + stage1-shapes-off all 424/21/0. Co-Authored-By: Claude Fable 5 --- BUCK | 2 +- buck-test-lowtier.sh | 6 +- docs/compiler-p5-results.md | 127 +++++++++++++ docs/compiler-plan.md | 13 +- docs/plans.md | 7 +- ejs-es6.ts | 67 ++++++- lib/eir/devirt.ts | 3 +- lib/eir/emit.ts | 35 ++-- lib/eir/integrate.ts | 23 +-- lib/eir/lower.ts | 17 +- lib/eir/lowtier-probe.ts | 4 +- lib/eir/optimize-guards.ts | 5 +- lib/eir/optimize.ts | 23 ++- lib/eir/sink-construct.ts | 5 +- lib/eir/sink-flow.ts | 4 +- lib/eir/specialize.ts | 5 +- lib/eir/tests.ts | 109 ++++------- lib/pass-config.ts | 344 +++++++++++++++++++++++++++++++++++ lib/passes/gather-imports.ts | 15 +- test/eir-lowtier1.js | 2 +- test/types-argsink1.js | 2 +- test/types-flowsink1.js | 2 +- test/types/README.md | 2 +- test/types/types-bench3.js | 2 +- test/types/types-bench4.js | 2 +- 25 files changed, 670 insertions(+), 156 deletions(-) create mode 100644 docs/compiler-p5-results.md create mode 100644 lib/pass-config.ts diff --git a/BUCK b/BUCK index 3263eac3..4e14a5c5 100644 --- a/BUCK +++ b/BUCK @@ -97,7 +97,7 @@ genrule( ) # the Phase 2 low-tier end-to-end probe: stage0-compile test/eir-lowtier1.js -# with EJS_EIR_LOWTIER=1 (hand-built low-tier bodies) and check output + +# with -flowtier (hand-built low-tier bodies) and check output + # emitted IR: buck2 build //:test-eir-lowtier genrule( name = "test-eir-lowtier", diff --git a/buck-test-lowtier.sh b/buck-test-lowtier.sh index 900d61ef..27fffee4 100644 --- a/buck-test-lowtier.sh +++ b/buck-test-lowtier.sh @@ -1,6 +1,6 @@ #!/bin/bash # Invoked by //:test-eir-lowtier. Compiles test/eir-lowtier1.js twice with -# the stage0 (node-hosted) compiler — once plain, once with EJS_EIR_LOWTIER=1 +# the stage0 (node-hosted) compiler — once plain, once with -flowtier # (which swaps the lowtier_* function bodies for hand-built low-tier EIR, # see lib/eir/lowtier-probe.ts) — runs both executables, and fails unless: # - both outputs match the committed expected-out byte for byte; @@ -55,8 +55,8 @@ run() { echo "== injected build ==" mkdir -p "$WORK/ltmp" - EJS_EIR_LOWTIER=1 TMPDIR="$WORK/ltmp" \ - node ../lib/generated/ejs-es6.js "${EJS_ARGS[@]}" --leave-temp eir-lowtier1.js \ + TMPDIR="$WORK/ltmp" \ + node ../lib/generated/ejs-es6.js "${EJS_ARGS[@]}" --leave-temp -flowtier eir-lowtier1.js \ || { echo "ERROR: injected compile failed"; return 1; } ./eir-lowtier1.js.exe > injected.out \ || { echo "ERROR: injected executable failed"; return 1; } diff --git a/docs/compiler-p5-results.md b/docs/compiler-p5-results.md new file mode 100644 index 00000000..8c5bd740 --- /dev/null +++ b/docs/compiler-p5-results.md @@ -0,0 +1,127 @@ +# compiler-P5 results — pass configuration: -O suites and -f/-fno- flags (P7.5) + +2026-07-29. The optimizer's configuration surface moves from ~20 +`EJS_*` environment variables to a gcc/clang-style flag surface; env +reverts to what it should be — a short-lived debugging channel +(`EJS_FLAGS`), not the stable interface. + +## What landed + +### The pass registry (`lib/pass-config.ts`) + +One table maps each canonical pass name to its `PassConfig` field, its +default at each -O level, and its help text. `--help`'s pass section +and the `--print-passes` "effective configuration" listing are both +generated from the table, so they cannot drift from the truth. Passes +read the resolved snapshot via `passes()` — never `process.env` (which +under the self-hosted runtime is a rebuild-the-whole-environment +getter; the `SinkFlags` snapshot in optimize.ts that motivated that +rule is now fed from the registry). A side effect worth noting: the +per-instruction env reads in emit.ts (`env_load`/`env_store` inline +slot addressing checked `process.env` on every emitted instruction) +are now plain property reads. + +### -O suites + +- **-O0** — straight lowering: no EIR optimizer, LLVM O0. The + lowering/emission behaviors that were never `opt_level`-gated + (born-shaped, shape guards under `--types`, promote, gc-frames, + inline-alloc, inline-env-slots) stay on at every level — exactly + today's -O0 behavior, preserved deliberately. +- **-O1** — the cheap always-sound intra-function tier: eir-opt, + eir-cleanup, slot-cse, shaped-sink, args-sink, flow-sink. +- **-O2** (default) — adds the module-level tier: devirt, eir-spec, + export-wrapper, ctor-sink, shape-fusion. Byte-identical to the + pre-P5 default pipeline (verified below). +- **-O3** — same EIR suite as -O2; only the LLVM pipeline runs + `default`. The EIR suite and the LLVM level stay one knob, with + `-fllvm-opt=<0..3>` as the escape hatch decoupling the LLVM side. + +### -f/-fno- per-pass flags + +Applied after the suite in command-line order, last-wins (gcc +semantics). Every `EJS_NO_X` maps 1:1 to `-fno-`: + +| old env spelling | new flag | +|---|---| +| EJS_NO_EIR_OPT | -fno-eir-opt | +| EJS_NO_EIR_CLEANUP | -fno-eir-cleanup | +| EJS_NO_SLOT_CSE | -fno-slot-cse | +| EJS_NO_SHAPED_SINK | -fno-shaped-sink | +| EJS_NO_ARGS_SINK | -fno-args-sink | +| EJS_NO_FLOW_SINK | -fno-flow-sink | +| EJS_NO_CTOR_SINK | -fno-ctor-sink | +| EJS_NO_DEVIRT | -fno-devirt | +| EJS_NO_EIR_SPEC | -fno-eir-spec | +| EJS_NO_EXPORT_WRAPPER | -fno-export-wrapper | +| EJS_NO_SHAPE_GUARDS | -fno-shape-guards | +| EJS_NO_POLY_SHAPE_GUARDS | -fno-poly-shape-guards | +| EJS_NO_BORN_SHAPED | -fno-born-shaped | +| EJS_NO_SHAPE_FUSION | -fno-shape-fusion | +| EJS_NO_PROMOTE=a,b | -fno-promote=a,b (and blanket -fno-promote, new) | +| EJS_NO_GC_FRAMES | -fno-gc-frames | +| EJS_NO_INLINE_ALLOC | -fno-inline-alloc | +| EJS_NO_INLINE_ENV_SLOTS | -fno-inline-env-slots | +| EJS_EIR_LOWTIER=1 | -flowtier | + +The env reads are deleted from the passes; the old spellings are inert. +`EJS_FLAGS` (tokenized as extra argv, applied after the real command +line so it wins, restricted to -O/-f tokens) is the single generic env +escape for bisecting inside harnesses that don't thread driver flags. +`test/tester.ts`'s `EJS_EXTRA_FLAGS` (a harness feature that already +threads argv) is unchanged and composes. + +### Consumers ported + +- `lib/eir/tests.ts`: the 12 bisect-flag tests use + `withPassConfig({...}, () => ...)` instead of `process.env` + mutation. +- `buck-test-lowtier.sh` / `//:test-eir-lowtier`: `-flowtier` instead + of `EJS_EIR_LOWTIER=1`. +- CI needed no changes (no workflow set `EJS_*` compile-time vars; + runtime knobs `EJS_GC_*`/`EJS_SHAPES*` are explicitly out of scope — + they configure the produced binary's runtime, not the compile). + +## The A/B gate (before deleting the env reads) + +Run with the env fallback layer still in place (suite → env → flags), +one stage0 binary, comparing `--dump-after eir-opt` output: + +- **env ≡ flag**: 35/35 pairs byte-identical across a targeted corpus + (each pass exercised on files that trigger it; the three emit-level + flags and eir-opt compared at the emitted-.ll level since they don't + show in EIR dumps; lowtier compared on the pre-opt dump; EJS_FLAGS + spelling included). +- **no default drift**: default-config dumps from the HEAD compiler + (built in a worktree) vs this branch — byte-identical for flag-off + and `--types` compiles across the corpus (types-bench2/3/4/5, + modules1, types-flowsink1, types-ctorsink1). +- After deletion: defaults still byte-identical; `EJS_NO_*` verified + inert. + +## Gates + +- tsc typecheck clean. +- test-eir: 216 pass + the same 11 compiler-P1.1 pins, nothing else. +- //:test-eir-lowtier green via `-flowtier`. +- Bootstrap matrix: stage0–3 (incl. the stage2/stage3 fixed point) + + stage1-shapes-off all green, 424 pass / 21 xfail / 0 fail in every + lane — identical to the phase-entry baseline. +- `--print-passes` / `--help` exercised; unknown-pass and bad + `EJS_FLAGS` tokens fail loudly. + +## Decisions and residue + +- **-O1 semantics changed by design**: pre-P5, -O1 ran the full EIR + optimizer (the only gate was `opt_level > 0`); it is now the + intra-function tier. -O2 is bit-for-bit the old default. +- `--types` stays a separate probe flag for now (the open question of + folding it in as `-fmaam` is untouched; it defaults off, so it is + not yet a suite member). +- Tuning knobs that were compile-time constants + (`EJS_SHAPE_FIELD_CAP_MAX` in lower.ts) stay constants — they were + never env vars despite the plan text; `-f=` machinery + exists (`-fllvm-opt`, `-fno-promote=list`) when one needs to become + configurable. +- New capability: blanket `-fno-promote` (the env spelling could only + exclude by substring match). diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md index 289ac5ab..081ee0a0 100644 --- a/docs/compiler-plan.md +++ b/docs/compiler-plan.md @@ -139,8 +139,17 @@ shaped-world continuation), shape-guard regions (see shapes-plan). - IR in the manifest: serialize the module's EIR so cross-module analysis and inlining through module boundaries work before — and instead of — any dynamic-loading story. -- [ ] **compiler-P5 — Pass-configuration ergonomics: -O suites and - -f/-fno- flags.** Env vars stop being the stable interface for +- [x] **compiler-P5 — Pass-configuration ergonomics: -O suites and + -f/-fno- flags.** DONE 2026-07-29 — + docs/compiler-p5-results.md (registry in lib/pass-config.ts; + suites: -O0 straight lowering, -O1 intra-function tier, -O2 the + full pre-P5 default byte-for-byte, -O3 = -O2 EIR-side with LLVM + default and -fllvm-opt as the escape hatch; every EJS_NO_X + → -fno-x 1:1 (EJS_EIR_LOWTIER → -flowtier), env reads deleted + after a 35-pair env≡flag A/B plus a HEAD-vs-branch default-dump + identity check; tests.ts uses withPassConfig; EJS_FLAGS is the + one env escape; --types stays a separate probe flag). + Original plan follows. Env vars stop being the stable interface for configuring the optimizer; a gcc/clang-style flag surface replaces them, and env reverts to what it should be — a short-lived debugging channel. Current state: `-O0`..`-O3` diff --git a/docs/plans.md b/docs/plans.md index c529f79c..0d165fcf 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -129,10 +129,13 @@ runtime-plan.md, compiler-plan.md. with one tsc --allowJs pass; tester.ts and gen-atoms.ts ported; `generator: esm` baselines byte-identical vs babel-node; babel removed from the repo). -- [ ] **P7.5** clang-style pass configuration: -O suites define the +- [x] **P7.5** clang-style pass configuration: -O suites define the optimizer tiers, -f/-fno- per-pass flags replace the EJS_* env vars, which revert to debugging-only (compiler-P5; independent, - can land any time). + can land any time). DONE 2026-07-29 — + docs/compiler-p5-results.md (pass registry in lib/pass-config.ts; + -O2 byte-identical to the pre-P5 default; env spellings deleted + after a 35-pair env≡flag A/B; EJS_FLAGS is the one env escape). ## P8 — Language modernization diff --git a/ejs-es6.ts b/ejs-es6.ts index 6396b1c1..bf2ccf90 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -23,6 +23,13 @@ import { LLVM_BINDIR as DEFAULT_LLVM_BINDIR, RUNLOOP_IMPL as DEFAULT_RUNLOOP_IMPL, } from "./lib/host-config"; +import { + formatEffectiveConfig, + formatPassHelp, + passes, + resolvePassConfig, + setPassConfig, +} from "./lib/pass-config"; const spawn = child_process.spawn; @@ -185,19 +192,19 @@ interface ArgSpec { const args: Record = { "-O0": { handler: () => (options.opt_level = 0), - help: "Optimization level 0.", + help: "straight lowering: no EIR optimizer, LLVM O0.", }, "-O1": { handler: () => (options.opt_level = 1), - help: "Optimization level 1. Similar to clang -O1", + help: "the cheap always-sound EIR tier (cleanup, CSE, sinking), LLVM O1.", }, "-O2": { handler: () => (options.opt_level = 2), - help: "Optimization level 2. Similar to clang -O2 (default)", + help: "the full EIR pipeline (adds the module-level tier), LLVM O2 (default).", }, "-O3": { handler: () => (options.opt_level = 3), - help: "Optimization level 3. Similar to clang -O3", + help: "same EIR suite as -O2, LLVM O3.", }, "-g": { flag: "debug", @@ -290,8 +297,19 @@ const args: Record = { flag: "srcdir", help: "internal flag. if set, will look for libecho/libpcre/etc from source directory locations.", }, + "--print-passes": { + handler: () => (print_passes = true), + handlerArgc: 0, + help: "print the effective pass configuration (after the -O suite and any -f flags) and exit.", + }, }; +// -f/-fno- tokens, in command-line order (applied after the +// -O suite by resolvePassConfig; EJS_FLAGS tokens land at the end, so +// the env escape wins for bisecting) +const pass_flag_tokens: string[] = []; +let print_passes = false; + function output_usage() { console.warn("Usage:"); console.warn(" ejs [options] file1.js file2.js file.js ..."); @@ -308,6 +326,12 @@ let file_args: string[] | undefined; if (argv.length > 0) { for (let ai = 0, ae = argv.length; ai < ae; ai++) { + // pass flags are prefix-matched (every other option is an exact + // table key; none start with -f) + if (argv[ai]!.indexOf("-f") === 0) { + pass_flag_tokens.push(argv[ai]!); + continue; + } const o = args[argv[ai]!]; if (o) { const opts = options as unknown as Record; @@ -328,10 +352,41 @@ if (argv.length > 0) { } } +// EJS_FLAGS: extra pass-configuration argv from the environment, for +// bisecting inside harnesses that don't thread driver flags. Applied +// after the real command line (so it wins), and restricted to -O/-f +// tokens — it configures the optimizer, nothing else. +for (const token of (process.env["EJS_FLAGS"] || "").split(/\s+/)) { + if (token.length === 0) continue; + const o = args[token]; + if (token.indexOf("-f") === 0) { + pass_flag_tokens.push(token); + } else if (o && token.indexOf("-O") === 0) { + o.handler!(); + } else { + console.warn(`EJS_FLAGS supports only -O and -f flags, got '${token}'`); + process.exit(-1); + } +} + +const resolved_passes = resolvePassConfig(options.opt_level, pass_flag_tokens); +if (resolved_passes.errors.length > 0) { + for (const err of resolved_passes.errors) console.warn(err); + process.exit(-1); +} +setPassConfig(resolved_passes.config); + if (options.show_help) { output_usage(); console.warn(""); output_options(); + console.warn(""); + console.warn(formatPassHelp()); + process.exit(0); +} + +if (print_passes) { + console.log(formatEffectiveConfig(resolved_passes, options.opt_level)); process.exit(0); } @@ -573,7 +628,9 @@ function compileFile( temp_files.push(bc_filename, bc_opt_filename, o_filename); - let opt_level = options.opt_level > 0 ? `default,` : ""; + // the LLVM pipeline follows the -O level unless -fllvm-opt decouples it + const llvm_opt = passes().llvmOpt ?? options.opt_level; + let opt_level = llvm_opt > 0 ? `default,` : ""; // bitcode end to end: the module serializes straight to .bc (no // llvm-as spawn, no textual round trip), opt reads and emits bitcode diff --git a/lib/eir/devirt.ts b/lib/eir/devirt.ts index 4cba8526..f2e09e27 100644 --- a/lib/eir/devirt.ts +++ b/lib/eir/devirt.ts @@ -42,6 +42,7 @@ import { Module, Func, Inst, Block } from "./ir"; import { Effect, opInfo } from "./ops"; import { computeRPO, computeDominators, dominates } from "./verifier"; +import { passes } from "../pass-config"; export interface DevirtStats { // call sites rewritten against an SSA-visible make_closure @@ -59,7 +60,7 @@ function comesBefore(idom: Map, a: Inst, b: Inst): boolean { export function devirtualizeModule(m: Module, toplevelName: string): DevirtStats { const stats: DevirtStats = { ssa_sites: 0, slot_sites: 0 }; - if (process.env["EJS_NO_DEVIRT"]) return stats; + if (!passes().devirt) return stats; const fnByName = new Map(); for (const fn of m.functions) fnByName.set(fn.name, fn); diff --git a/lib/eir/emit.ts b/lib/eir/emit.ts index 179b704a..20ea2608 100644 --- a/lib/eir/emit.ts +++ b/lib/eir/emit.ts @@ -20,6 +20,7 @@ import * as consts from "../consts"; import type { ABI } from "../abi"; import type { RuntimeInterface } from "../runtime"; import type { Module as EIRModule, Func, Block, Inst, Target } from "./ir"; +import { passes } from "../pass-config"; import { computeSpilledValues } from "./liveness"; const ir = llvm.IRBuilder; @@ -272,7 +273,7 @@ export class EIREmitter { // values live across safepoints get frame slots this.gc_frame = null; this.gc_frame_slots = null; - if (!process.env["EJS_NO_GC_FRAMES"]) { + if (passes().gcFrames) { const spilled = computeSpilledValues(eirFn); if (spilled) { const slots = new Map(); @@ -950,43 +951,41 @@ export class EIREmitter { const n = inst.imms["size"] as number; // envs are 39% of all allocations (the P0 // census) — bump-allocate inline; the runtime call is - // the slow path/safepoint. EJS_NO_INLINE_ALLOC=1 is + // the slow path/safepoint. -fno-inline-alloc is // the compile-time bisect hook. const slow = () => this.call(rt.make_closure_env, [consts.int32(n)], "env"); - const rv = process.env["EJS_NO_INLINE_ALLOC"] - ? slow() - : this.v.emitEnvAllocInline(n, slow); + const rv = passes().inlineAlloc ? this.v.emitEnvAllocInline(n, slow) : slow(); this.values.set(inst, rv); return; } case "env_load": { // inline slot addressing, recomputed per use // from the boxed env (a relocated env re-derives) — - // deletes a runtime call per access. EJS_NO_INLINE_ENV_SLOTS + // deletes a runtime call per access. -fno-inline-env-slots // restores the runtime-call path. - let ref = process.env["EJS_NO_INLINE_ENV_SLOTS"] - ? this.call( + let ref = passes().inlineEnvSlots + ? this.v.emitEnvSlotRef( + this.val(inst.operands[0]), + inst.imms["slot"] as number + ) + : this.call( rt.get_env_slot_ref, [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], "slotref" - ) - : this.v.emitEnvSlotRef( - this.val(inst.operands[0]), - inst.imms["slot"] as number ); this.values.set(inst, ir.createLoad(types.EjsValue, ref, "slot")); return; } case "env_store": { - let ref = process.env["EJS_NO_INLINE_ENV_SLOTS"] - ? this.call( + let ref = passes().inlineEnvSlots + ? this.v.emitEnvSlotRef( + this.val(inst.operands[0]), + inst.imms["slot"] as number + ) + : this.call( rt.get_env_slot_ref, [this.val(inst.operands[0]), consts.int32((inst.imms["slot"] as number))], "slotref" - ) - : this.v.emitEnvSlotRef( - this.val(inst.operands[0]), - inst.imms["slot"] as number ); ir.createStore(this.val(inst.operands[1]), ref); this.emitStoreBarrier(this.val(inst.operands[0]), this.val(inst.operands[1])); diff --git a/lib/eir/integrate.ts b/lib/eir/integrate.ts index 02804aee..dd807291 100644 --- a/lib/eir/integrate.ts +++ b/lib/eir/integrate.ts @@ -39,6 +39,7 @@ import { printModule } from "./printer"; import type * as e from "../estree"; import type { ModuleInfo } from "../module-info"; import type { CompilerOptions } from "../options"; +import { passes } from "../pass-config"; // one export's accessor pair, by EIR function name (compiler.ts resolves // them against the emitted module in emitModuleResolution) @@ -456,20 +457,20 @@ export function collectEIRToplevel( // the module in place) if (dumpRequested(options)) dumpModule(filename, "toplevel-as-EIR", eir_module); - // testing: EJS_EIR_LOWTIER=1 swaps the bodies of the lowtier_* + // testing: -flowtier swaps the bodies of the lowtier_* // probe functions (test/eir-lowtier1.js) for hand-built low-tier // EIR, so the low-tier ops can be executed end to end before - // lowering emits them. Same mold as EJS_NO_EIR_OPT. - if (process.env["EJS_EIR_LOWTIER"]) { + // lowering emits them. Same mold as -fno-eir-opt. + if (passes().lowtier) { const n = injectLowTierProbes(eir_module); if (n > 0) verifyModule(eir_module); } - // debugging/measurement: EJS_NO_EIR_OPT=1 disables the EIR - // optimizer without touching the LLVM pass pipeline (-O0 changes - // both), mirroring the EJS_NO_PROMOTE bisect hook + // -fno-eir-opt disables the EIR optimizer without touching the + // LLVM pass pipeline (-O0 changes both; -fllvm-opt decouples the + // LLVM side) let spec_stats: SpecStats | null = null; - if (options.opt_level > 0 && !process.env["EJS_NO_EIR_OPT"]) { + if (passes().eirOpt) { const stats = optimizeModule(eir_module, info.name); if ( stats.allocs_sunk || @@ -527,8 +528,8 @@ export function collectEIRToplevel( // (never on flag-off compiles). A second optimizer pass then // cleans the clones (entry boxes prove numbers; residual // guards fold; loop joins go raw; dead closures/loads drop). - // EJS_NO_EIR_SPEC=1 bisects specialization alone. - if (oracle && !process.env["EJS_NO_EIR_SPEC"]) { + // -fno-eir-spec bisects specialization alone. + if (oracle && passes().eirSpec) { spec_stats = { specialized: 0, sites: 0, rejected: 0, wrapped: 0, fenced: 0 }; const changed = specializeModule( eir_module, @@ -574,7 +575,7 @@ export function collectEIRToplevel( // (docs/sinking-plan.md). Runs after specialization — the // hot construct sites live inside the clones — and re-runs // the optimizer so the shaped-literal sink drains the - // planted virtual allocations. EJS_NO_CTOR_SINK bisects + // planted virtual allocations. -fno-ctor-sink bisects // (checked inside the pass). if (oracle) { const promoted = new Set(); @@ -599,7 +600,7 @@ export function collectEIRToplevel( // devirtualized site no longer uses its closure/slot-load as // a plain-call callee, which would make specialize.ts's // closed-world enumeration decline the strictly-better - // call_typed rewrite. EJS_NO_DEVIRT bisects (checked inside + // call_typed rewrite. -fno-devirt bisects (checked inside // the pass). { const dstats = devirtualizeModule(eir_module, info.name); diff --git a/lib/eir/lower.ts b/lib/eir/lower.ts index c2743d07..bd951751 100644 --- a/lib/eir/lower.ts +++ b/lib/eir/lower.ts @@ -23,6 +23,7 @@ import { eir_intrinsics } from "./intrinsics"; import type * as e from "../estree"; import type { ModuleInfo } from "../module-info"; import type { TypeOracle } from "./oracle"; +import { passes } from "../pass-config"; // --- module-scope interop types (integrate.ts imports these) ----------------- @@ -599,7 +600,7 @@ class LowerFunction { // single-cell embedded allocation applies to flag-off // literals exactly as to typed ones. if ( - !process.env["EJS_NO_BORN_SHAPED"] && + passes().bornShaped && keys.length >= 1 && keys.length <= EJS_SHAPE_FIELD_CAP_MAX && new Set(keys).size === keys.length && @@ -941,8 +942,8 @@ class LowerFunction { // counted decline and today's generic op. Guarded consumption is // correct even when the oracle is wrong: the has_shape compare decides // at runtime, and a failed guard costs speed, never behavior. - // EJS_NO_SHAPE_GUARDS=1 is the compile-time bisect hook (the - // EJS_NO_EIR_OPT mold); runtime EJS_SHAPES=off makes every guard fail. + // -fno-shape-guards is the compile-time bisect hook (the + // -fno-eir-opt mold); runtime EJS_SHAPES=off makes every guard fail. shapeDecline(reason: string): null { const stats = this.mod_ctx.typed_stats; @@ -967,14 +968,14 @@ class LowerFunction { // Every shape in a multi-shape answer must carry the field: a shape // that lacks it would need the fast arm to run proto-lookup semantics, // which only the generic path performs (criterion 2 — no near-misses). - // EJS_NO_POLY_SHAPE_GUARDS=1 bisects polymorphic chains: 2-shape sites + // -fno-poly-shape-guards bisects polymorphic chains: 2-shape sites // decline "polymorphic" exactly as they did before the extension. shapeFactFor( objNode: e.Expression | null, atom: string ): { key: string; slot: number; repr: "boxed" | "f64" }[] | null { if (!objNode || !this.oracle || !this.oracle.receiverShapeOfNode) return null; - if (process.env["EJS_NO_SHAPE_GUARDS"]) return null; + if (!passes().shapeGuards) return null; const stats = this.mod_ctx.typed_stats; if (stats) stats.shape_sites = (stats.shape_sites ?? 0) + 1; const q = this.oracle.receiverShapeOfNode(objNode); @@ -982,7 +983,7 @@ class LowerFunction { this.shapeDumpSite(objNode, atom, `declined ${q.declined}`); return this.shapeDecline(q.declined); } - if (q.shapes.length > 1 && process.env["EJS_NO_POLY_SHAPE_GUARDS"]) { + if (q.shapes.length > 1 && !passes().polyShapeGuards) { this.shapeDumpSite(objNode, atom, "declined polymorphic"); return this.shapeDecline("polymorphic"); } @@ -1158,7 +1159,7 @@ class LowerFunction { // fail the one-compare guard and run the original sequential stores. // The runtime call re-checks everything again (incl. proto-chain // accessor interception) and falls back to sequential [[Set]]s, so a - // wrong guard can cost speed, never behavior. EJS_NO_BORN_SHAPED is + // wrong guard can cost speed, never behavior. -fno-born-shaped is // the bisect hook. Returns how many leading statements were consumed. fenceDecline(reason: string): void { @@ -1170,7 +1171,7 @@ class LowerFunction { } lowerBornShapedCtorPrefix(body: e.BlockStatement): number { - if (!this.oracle || process.env["EJS_NO_BORN_SHAPED"]) return 0; + if (!this.oracle || !passes().bornShaped) return 0; if (this.isToplevel || this.spec) return 0; if (this.info.node.type === "ArrowFunctionExpression") return 0; diff --git a/lib/eir/lowtier-probe.ts b/lib/eir/lowtier-probe.ts index b507408c..df218fd2 100644 --- a/lib/eir/lowtier-probe.ts +++ b/lib/eir/lowtier-probe.ts @@ -5,8 +5,8 @@ // Hand-built low-tier bodies for the low-tier end-to-end test. Lowering does // does emit has_tag/unbox_f64/f64_*/box_f64 through the oracle path, but to prove // the emitted machine code is correct we substitute known bodies into the -// functions of test/eir-lowtier1.js, gated on EJS_EIR_LOWTIER=1 (a debug/test -// hook in the EJS_NO_EIR_OPT mold). With the variable unset nothing here +// functions of test/eir-lowtier1.js, gated on -flowtier (a debug/test +// hook in the -fno-eir-opt mold). With the flag off nothing here // runs; the test file behaves identically either way, so it also passes in // the normal matrix. // diff --git a/lib/eir/optimize-guards.ts b/lib/eir/optimize-guards.ts index 71ce15c7..02625aa9 100644 --- a/lib/eir/optimize-guards.ts +++ b/lib/eir/optimize-guards.ts @@ -114,6 +114,7 @@ import { shapeFactKey, } from "./verifier"; import type { OptStats } from "./optimize"; +import { passes } from "../pass-config"; // generic ops that (1) lowering pairs with f64 fast ops, and (2) are // pure and value-identical to the f64 op when both operands are numbers @@ -1778,11 +1779,11 @@ export function optimizeShapeRegions( sweepUnreachableBlocks(fn); - // EJS_NO_SHAPE_FUSION disables the + // -fno-shape-fusion disables the // heterogeneous merge + the in-loop numeric folding, leaving exactly // the plain shape-region behavior (typed slot ACCESS is a contract // change and has no off switch — the verifier owns it). - const noFusion = !!process.env["EJS_NO_SHAPE_FUSION"]; + const noFusion = !passes().shapeFusion; let changedAny = false; for (let round = 0; round < 50; round++) { let changed = false; diff --git a/lib/eir/optimize.ts b/lib/eir/optimize.ts index eccaa3d4..e49d2824 100644 --- a/lib/eir/optimize.ts +++ b/lib/eir/optimize.ts @@ -32,6 +32,7 @@ import { } from "./optimize-guards"; import { sinkFlowAllocations } from "./sink-flow"; import { cleanupFunction, computeStableSlots, cseModuleSlotLoads } from "./cleanup"; +import { passes } from "../pass-config"; export interface OptStats { allocs_sunk: number; @@ -498,11 +499,12 @@ function sinkShapedAlloc( return changed; } -// the bisect-flag snapshot for one optimizeFunction run. process.env -// is a rebuild-the-whole-environment getter under the self-hosted -// runtime (node-compat), so the flags are read ONCE per function, never -// in the fixpoint rounds (found the hard way: the stage2 self-compile -// spent most of its wall time constructing env objects). +// the bisect-flag snapshot for one optimizeFunction run, from the +// pass-config registry (compiler-P5; this struct is what generalized +// into it). The old process.env reads lived here — under the +// self-hosted runtime env access is a rebuild-the-whole-environment +// getter, which is why flags are snapshotted per function, never read +// in the fixpoint rounds. export interface SinkFlags { noShaped: boolean; noArgs: boolean; @@ -512,12 +514,13 @@ export interface SinkFlags { } function readSinkFlags(): SinkFlags { + const cfg = passes(); return { - noShaped: !!process.env["EJS_NO_SHAPED_SINK"], - noArgs: !!process.env["EJS_NO_ARGS_SINK"], - noFlow: !!process.env["EJS_NO_FLOW_SINK"], - noCse: !!process.env["EJS_NO_SLOT_CSE"], - noCleanup: !!process.env["EJS_NO_EIR_CLEANUP"], + noShaped: !cfg.shapedSink, + noArgs: !cfg.argsSink, + noFlow: !cfg.flowSink, + noCse: !cfg.slotCse, + noCleanup: !cfg.eirCleanup, }; } diff --git a/lib/eir/sink-construct.ts b/lib/eir/sink-construct.ts index 70f24baf..78d06992 100644 --- a/lib/eir/sink-construct.ts +++ b/lib/eir/sink-construct.ts @@ -47,11 +47,12 @@ // - the use region is a single-entry single-exit acyclic subgraph of // plain br/cond_br blocks, so it can be duplicated wholesale. // -// EJS_NO_CTOR_SINK=1 bisects this pass alone. +// -fno-ctor-sink bisects this pass alone. import { Block, Func, Inst, Module, ShapeField } from "./ir"; import { Effect, opInfo } from "./ops"; import { computeRPO, computeDominators, dominates } from "./verifier"; +import { passes } from "../pass-config"; // region size cap: a use region bigger than this is not a constructor // kernel, and cloning it would bloat code for a marginal win @@ -280,7 +281,7 @@ export function sinkConstructResults( promotedSlots: Set, toplevelName: string | null ): number { - if (process.env["EJS_NO_CTOR_SINK"]) return 0; + if (!passes().ctorSink) return 0; if (m.shapes.size === 0) return 0; const toplevelFn = toplevelName diff --git a/lib/eir/sink-flow.ts b/lib/eir/sink-flow.ts index 6f1f906e..4a518ba0 100644 --- a/lib/eir/sink-flow.ts +++ b/lib/eir/sink-flow.ts @@ -49,7 +49,7 @@ // instruction plays no second role (a `o.self = o` write-escape // declines). // -// EJS_NO_FLOW_SINK=1 bisects this pass alone. +// -fno-flow-sink bisects this pass alone. import { Block, Func, Inst, Module, replaceAllUses } from "./ir"; // type-only imports: a value import would make optimize <-> sink-flow a @@ -485,7 +485,7 @@ function applyPlan( // try to flow-sink candidates in `fn`; at most ONE rewrite per call // (the rewrite reshapes the CFG, so later candidates re-plan against // fresh state on the driver's next fixpoint round). The bisect flag -// (EJS_NO_FLOW_SINK) is read by the driver, not here (SinkFlags note), +// (-fno-flow-sink) is read by the driver, not here (SinkFlags note), // and the use map + candidate lists come from the driver's single // per-round scan — this pass MUTATES without maintaining the map, so // it must stay the round's last consumer. Returns whether anything diff --git a/lib/eir/specialize.ts b/lib/eir/specialize.ts index d8d36c23..f19ae01a 100644 --- a/lib/eir/specialize.ts +++ b/lib/eir/specialize.ts @@ -80,7 +80,7 @@ // full dynamic semantics, external callers included. Internal // callers reach the same guards through the generic entry (devirt // direct-calls it; LLVM can inline the prologue). -// EJS_NO_EXPORT_WRAPPER=1 bisects the wrapper alone. +// -fno-export-wrapper bisects the wrapper alone. import { Module, Func, Inst, Block } from "./ir"; import { Effect, opInfo } from "./ops"; @@ -90,6 +90,7 @@ import type { ModCtx, SpecMode } from "./lower"; import type { ScopeAnalysis, FnInfo } from "./scopes"; import type { TypeOracle } from "./oracle"; import type * as e from "../estree"; +import { passes } from "../pass-config"; export interface SpecStats { // clones emitted @@ -539,7 +540,7 @@ function specializeRound( // per-site dispatch are the recorded follow-on.) if (flow.escapes) { if (wrapped.has(info)) continue; // judged (installed or declined) - if (process.env["EJS_NO_EXPORT_WRAPPER"]) continue; + if (!passes().exportWrapper) continue; if (!flow.referenced) continue; // static callee checks (AST side); >=1 formal or the guard diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 91d42b0a..8b89edf4 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -31,6 +31,7 @@ import { DesugarMetaProperties } from "../passes/desugar-metaproperties"; import * as esprima from "../../external-deps/esprima/esprima-es6"; import type * as e from "../estree"; import type { CompilerOptions } from "../options"; +import { withPassConfig } from "../pass-config"; let failures = 0; @@ -876,17 +877,14 @@ test("optimize: a written key's reads fold flow-sensitively (sinking-P3)", () => assert(ret!.operands[0]!.op === "blockparam", "return should see the written param x"); }); -test("optimize: EJS_NO_FLOW_SINK restores the written-key decline", () => { - process.env["EJS_NO_FLOW_SINK"] = "1"; - try { +test("optimize: -fno-flow-sink restores the written-key decline", () => { + withPassConfig({ flowSink: false }, () => { let { printed } = lowerAndOptimize( "function f(x) { let o = { a: 1 }; o.a = x; return o.a; }" ); assertContains(printed, "make_object"); assertContains(printed, "get_prop_atom"); - } finally { - delete process.env["EJS_NO_FLOW_SINK"]; - } + }); }); test("optimize: non-own-key read keeps the object (prototype chain)", () => { @@ -1872,9 +1870,8 @@ test("specialize: wrapper declines — no payoff, env capture, frame ops", () => assert(frame.stats.rejected === 0, `rejected=${frame.stats.rejected}`); }); -test("specialize: EJS_NO_EXPORT_WRAPPER leaves the escapee fully generic", () => { - process.env["EJS_NO_EXPORT_WRAPPER"] = "1"; - try { +test("specialize: -fno-export-wrapper leaves the escapee fully generic", () => { + withPassConfig({ exportWrapper: false }, () => { const { module, stats } = specHarness( `function outer(h) { ${SPEC_KERNEL} var r = k(1); h(k); return r; }`, numericStubOracle(["n", "s", "i", "r"]) @@ -1885,9 +1882,7 @@ test("specialize: EJS_NO_EXPORT_WRAPPER leaves the escapee fully generic", () => module.functions.every((f) => f.sig === null), "no sig'd clones at all" ); - } finally { - delete process.env["EJS_NO_EXPORT_WRAPPER"]; - } + }); }); test("specialize: env capture and `this` are structurally rejected post-lowering", () => { @@ -2189,17 +2184,14 @@ test("shapes: a boxed-field store takes non-numbers fast (swapped tag arms)", () ); }); -test("shapes: EJS_NO_SHAPE_GUARDS disables the diamonds", () => { - process.env["EJS_NO_SHAPE_GUARDS"] = "1"; - try { +test("shapes: -fno-shape-guards disables the diamonds", () => { + withPassConfig({ shapeGuards: false }, () => { const { printed } = lowerWithOracle( "function f(p) { return p.y; }", stubShapeOracle({ p: PXY }) ); assertNotContains(printed, "has_shape"); - } finally { - delete process.env["EJS_NO_SHAPE_GUARDS"]; - } + }); }); // --- 2-way polymorphic guard chains ---------------------------- @@ -2280,9 +2272,8 @@ test("shapes-poly: mixed reprs orient each arm by its own field repr", () => { ); }); -test("shapes-poly: EJS_NO_POLY_SHAPE_GUARDS declines 2-shape sites, keeps mono", () => { - process.env["EJS_NO_POLY_SHAPE_GUARDS"] = "1"; - try { +test("shapes-poly: -fno-poly-shape-guards declines 2-shape sites, keeps mono", () => { + withPassConfig({ polyShapeGuards: false }, () => { const poly = lowerWithOracle( "function f(p) { return p.y; }", stubShapeOracle({ p: [PXY, PZXY] }) @@ -2293,9 +2284,7 @@ test("shapes-poly: EJS_NO_POLY_SHAPE_GUARDS declines 2-shape sites, keeps mono", stubShapeOracle({ p: PXY }) ).printed; assertContains(mono, "has_shape"); - } finally { - delete process.env["EJS_NO_POLY_SHAPE_GUARDS"]; - } + }); }); test("shapes-poly: structurally equal shapes reported twice guard once", () => { @@ -2860,17 +2849,14 @@ test("born-shaped: flag-off (null oracle) keeps today's make_object exactly", () assertContains(printed, "make_object"); }); -test("born-shaped: EJS_NO_BORN_SHAPED restores make_object", () => { - process.env["EJS_NO_BORN_SHAPED"] = "1"; - try { +test("born-shaped: -fno-born-shaped restores make_object", () => { + withPassConfig({ bornShaped: false }, () => { const { printed } = lowerWithOracle( "function f() { return { x: 1, y: 2 }; }", stubOracle({}) ); assertNotContains(printed, "make_object_shaped"); - } finally { - delete process.env["EJS_NO_BORN_SHAPED"]; - } + }); }); test("born-shaped: index-looking and duplicate keys decline to make_object", () => { @@ -2949,17 +2935,14 @@ test("ctor-fill: a single-store prefix stays sequential (threshold)", () => { assertNotContains(printed, "fill_object_shaped"); }); -test("ctor-fill: EJS_NO_BORN_SHAPED disables the fill diamond", () => { - process.env["EJS_NO_BORN_SHAPED"] = "1"; - try { +test("ctor-fill: -fno-born-shaped disables the fill diamond", () => { + withPassConfig({ bornShaped: false }, () => { const { printed } = lowerWithOracle( "function Pt(x, y) { this.x = x; this.y = y; }", stubOracle({}) ); assertNotContains(printed, "fill_object_shaped"); - } finally { - delete process.env["EJS_NO_BORN_SHAPED"]; - } + }); }); // --- born-shaped verifier rules (hand-built attack IR) -------------------------- @@ -3182,17 +3165,14 @@ test("sink-shaped: a written literal flow-sinks through the generic arms (sinkin assertContains(printed, 'value=2'); }); -test("sink-shaped: EJS_NO_FLOW_SINK restores the written-literal decline", () => { - process.env["EJS_NO_FLOW_SINK"] = "1"; - try { +test("sink-shaped: -fno-flow-sink restores the written-literal decline", () => { + withPassConfig({ flowSink: false }, () => { const { printed, stats } = lowerShapedSink( "function f(a, b) { var o = { x: 1, y: a, s: b }; o.x = 2; return o.x; }" ); assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); assertContains(printed, "make_object_shaped"); - } finally { - delete process.env["EJS_NO_FLOW_SINK"]; - } + }); }); test("sink-shaped: a non-own read blocks removal but own reads still fold", () => { @@ -3263,17 +3243,14 @@ test("sink-shaped: an unprovable f64 operand folds the guard to the generic arm" assertNotContains(printed, "get_prop_atom"); // generic arm folded to v }); -test("sink-shaped: EJS_NO_SHAPED_SINK leaves the allocation alone", () => { - process.env["EJS_NO_SHAPED_SINK"] = "1"; - try { +test("sink-shaped: -fno-shaped-sink leaves the allocation alone", () => { + withPassConfig({ shapedSink: false }, () => { const { printed, stats } = lowerShapedSink( "function f(a, b) { var o = { x: 1, y: a, s: b }; return o.x + o.y; }" ); assert(stats.shape_allocs_sunk === 0, `sunk=${stats.shape_allocs_sunk}`); assertContains(printed, "make_object_shaped"); - } finally { - delete process.env["EJS_NO_SHAPED_SINK"]; - } + }); }); // --- flow-sensitive sinking + partial escapes (sinking-P3) ------------------ @@ -3390,15 +3367,12 @@ test("sink-args: refusals keep the allocation", () => { } }); -test("sink-args: EJS_NO_ARGS_SINK leaves the allocation alone", () => { - process.env["EJS_NO_ARGS_SINK"] = "1"; - try { +test("sink-args: -fno-args-sink leaves the allocation alone", () => { + withPassConfig({ argsSink: false }, () => { let { printed } = lowerAndOptimize("function f() { return arguments.length; }"); assertContains(printed, "args_obj"); assertNotContains(printed, "arg_len"); - } finally { - delete process.env["EJS_NO_ARGS_SINK"]; - } + }); }); // --- constructor-result sinking --------------------------------- @@ -3569,15 +3543,12 @@ test("sink-ctor: a non-promoted slot declines", () => { assertNotContains(printFunction(user), "epoch_check"); }); -test("sink-ctor: EJS_NO_CTOR_SINK leaves the construct alone", () => { - process.env["EJS_NO_CTOR_SINK"] = "1"; - try { +test("sink-ctor: -fno-ctor-sink leaves the construct alone", () => { + withPassConfig({ ctorSink: false }, () => { const { n, printed } = runCtorSink({}); assert(n === 0, `sunk=${n}`); assertNotContains(printed, "epoch_check"); - } finally { - delete process.env["EJS_NO_CTOR_SINK"]; - } + }); }); // --- cleanup (compiler-P1): const folding, lattice, CSE, devirt ----------------- @@ -3708,15 +3679,12 @@ test("cleanup: trivial block params prune to their single value", () => { assert(ret!.operands[0] === v, "return sees the value directly"); }); -test("cleanup: EJS_NO_EIR_CLEANUP leaves the residue alone", () => { - process.env["EJS_NO_EIR_CLEANUP"] = "1"; - try { +test("cleanup: -fno-eir-cleanup leaves the residue alone", () => { + withPassConfig({ eirCleanup: false }, () => { const { printed, stats } = optStatsOf("function f() { return 2 * 3 + 4; }"); assertContains(printed, " = mul "); assert(stats.consts_folded === 0, `consts_folded=${stats.consts_folded}`); - } finally { - delete process.env["EJS_NO_EIR_CLEANUP"]; - } + }); }); // --- module-slot load CSE ------------------------------------------------------- @@ -3896,16 +3864,13 @@ test("devirt: an env-using callee declines the cross-function slot site", () => assert(ssaCall.imms.direct === "helper" && !slotCall.imms.direct, "only the ssa site"); }); -test("devirt: EJS_NO_DEVIRT leaves every site generic", () => { - process.env["EJS_NO_DEVIRT"] = "1"; - try { +test("devirt: -fno-devirt leaves every site generic", () => { + withPassConfig({ devirt: false }, () => { const { mod, ssaCall } = buildDevirtModule({}); const stats = devirtualizeModule(mod, "toplevel"); assert(stats.ssa_sites === 0 && stats.slot_sites === 0, "disabled"); assert(!ssaCall.imms.direct, "call stays generic"); - } finally { - delete process.env["EJS_NO_DEVIRT"]; - } + }); }); // -------------------------------------------------------------------------------- diff --git a/lib/pass-config.ts b/lib/pass-config.ts new file mode 100644 index 00000000..51191fc4 --- /dev/null +++ b/lib/pass-config.ts @@ -0,0 +1,344 @@ +/* -*- Mode: typescript; indent-tabs-mode: nil; tab-width: 4 -*- + * vim: set ts=4 sw=4 et tw=99 ft=typescript: + */ + +// Pass configuration (compiler-P5): the clang-style -O/-f surface. +// +// One registry table maps each canonical pass name to its PassConfig +// field, its default at each -O level, and its help text; the driver's +// --help and --print-passes listings are generated from it so they +// can't drift. Passes read the resolved snapshot via passes() — never +// process.env, which under the self-hosted runtime is a +// rebuild-the-whole-environment getter (the SinkFlags lesson in +// optimize.ts, now the rule for every pass). +// +// Resolution order (gcc semantics): the -O suite's defaults, then +// -f/-fno- overrides in command-line order, last-wins. +// EJS_FLAGS in the environment is tokenized and applied after the real +// argv by the driver — the single debugging escape for harnesses that +// don't thread driver flags. +// +// Suites: -O0 is straight lowering (no EIR optimizer; the lowering and +// emission behaviors that were never opt_level-gated stay on — see the +// per-pass levels below); -O1 is the cheap always-sound intra-function +// tier; -O2 (the default) adds the module-level tier and is exactly the +// pre-P5 default pipeline; -O3 is -O2 on the EIR side (the LLVM +// pipeline still runs default — -fllvm-opt= decouples it). + +export interface PassConfig { + // the EIR optimizer (integrate.ts drives, optimize.ts runs) + eirOpt: boolean; + eirCleanup: boolean; + slotCse: boolean; + shapedSink: boolean; + argsSink: boolean; + flowSink: boolean; + // the module-level tier + devirt: boolean; + eirSpec: boolean; + exportWrapper: boolean; + ctorSink: boolean; + shapeFusion: boolean; + // lowering-time behaviors (oracle-gated where applicable) + shapeGuards: boolean; + polyShapeGuards: boolean; + bornShaped: boolean; + promote: boolean; + // -fno-promote=: decline promotion only for module paths + // containing one of the substrings (the old EJS_NO_PROMOTE list) + promoteExclude: string[]; + // emission controls (emit.ts) + gcFrames: boolean; + inlineAlloc: boolean; + inlineEnvSlots: boolean; + // opt-in probes + lowtier: boolean; + // LLVM pipeline level escape hatch: null = follow the -O level + llvmOpt: number | null; +} + +// which boolean field a pass name controls (promoteExclude and llvmOpt +// are the two valued knobs, handled specially in applyFlag) +type BoolField = { + [K in keyof PassConfig]: PassConfig[K] extends boolean ? K : never; +}[keyof PassConfig]; + +export interface PassDesc { + name: string; // canonical -f/-fno- spelling + field: BoolField; + // lowest -O level the pass defaults on at (0 = always, including + // -O0; OPT_IN = never — only an explicit -f enables it) + minLevel: number; + help: string; +} + +const OPT_IN = 99; + +export const PASSES: readonly PassDesc[] = [ + { + name: "eir-opt", + field: "eirOpt", + minLevel: 1, + help: "the EIR optimizer as a whole; off = straight lowering to LLVM", + }, + { + name: "eir-cleanup", + field: "eirCleanup", + minLevel: 1, + help: "constant folding, trivial-param pruning, typeof/boolean rewrites, lattice-typed f64 lowering", + }, + { + name: "slot-cse", + field: "slotCse", + minLevel: 1, + help: "module-slot load CSE over stable %self slots", + }, + { + name: "shaped-sink", + field: "shapedSink", + minLevel: 1, + help: "scalar replacement of non-escaping shaped literals", + }, + { + name: "args-sink", + field: "argsSink", + minLevel: 1, + help: "rest/arguments objects used only for .length fold to arg_len", + }, + { + name: "flow-sink", + field: "flowSink", + minLevel: 1, + help: "flow-sensitive sinking of written/partially-escaping literals", + }, + { + name: "devirt", + field: "devirt", + minLevel: 2, + help: "direct-call devirtualization of module-local closures", + }, + { + name: "eir-spec", + field: "eirSpec", + minLevel: 2, + help: "oracle-driven function specialization (needs --types)", + }, + { + name: "export-wrapper", + field: "exportWrapper", + minLevel: 2, + help: "guarded entry wrappers so escaping functions keep specialized clones (needs --types)", + }, + { + name: "ctor-sink", + field: "ctorSink", + minLevel: 2, + help: "epoch-guarded constructor-result sinking (needs --types)", + }, + { + name: "shape-fusion", + field: "shapeFusion", + minLevel: 2, + help: "heterogeneous shape+numeric region merging and in-loop numeric folding", + }, + { + name: "shape-guards", + field: "shapeGuards", + minLevel: 0, + help: "has_shape guard diamonds on oracle-known receivers (needs --types)", + }, + { + name: "poly-shape-guards", + field: "polyShapeGuards", + minLevel: 0, + help: "2-way polymorphic shape-guard chains (needs --types)", + }, + { + name: "born-shaped", + field: "bornShaped", + minLevel: 0, + help: "object literals and constructor prefixes allocate at their birth shape", + }, + { + name: "promote", + field: "promote", + minLevel: 0, + help: "promote non-exported module-level vars to hidden module slots; -fno-promote= declines only matching module paths", + }, + { + name: "gc-frames", + field: "gcFrames", + minLevel: 0, + help: "precise GC frames for values live across safepoints", + }, + { + name: "inline-alloc", + field: "inlineAlloc", + minLevel: 0, + help: "inline bump allocation for environments", + }, + { + name: "inline-env-slots", + field: "inlineEnvSlots", + minLevel: 0, + help: "inline env slot addressing instead of runtime accessor calls", + }, + { + name: "lowtier", + field: "lowtier", + minLevel: OPT_IN, + help: "swap the lowtier_* probe function bodies for hand-built low-tier EIR (test hook)", + }, +]; + +const byName = new Map(PASSES.map((p) => [p.name, p])); + +export function defaultPassConfig(optLevel: number): PassConfig { + const cfg = { + promoteExclude: [], + llvmOpt: null, + } as unknown as PassConfig; + for (const p of PASSES) cfg[p.field] = optLevel >= p.minLevel; + return cfg; +} + +// apply one -f/-fno- token. returns an error message, or null on +// success. `prov` (when given) records the token as each touched +// setting's provenance, for --print-passes. +export function applyPassFlag( + cfg: PassConfig, + token: string, + prov?: Map +): string | null { + if (token.indexOf("-f") !== 0) return `not a pass flag: ${token}`; + let body = token.substring(2); + let enable = true; + if (body.indexOf("no-") === 0) { + enable = false; + body = body.substring(3); + } + let value: string | null = null; + const eq = body.indexOf("="); + if (eq !== -1) { + value = body.substring(eq + 1); + body = body.substring(0, eq); + } + + // the LLVM-side escape hatch is a valued knob, not a registry pass + if (body === "llvm-opt") { + if (!enable) { + if (value !== null) return `-fno-llvm-opt does not take a value`; + cfg.llvmOpt = 0; + } else { + const n = value === null ? NaN : parseInt(value, 10); + if (!(n >= 0 && n <= 3)) return `-fllvm-opt wants =<0..3>, got '${token}'`; + cfg.llvmOpt = n; + } + if (prov) prov.set("llvm-opt", token); + return null; + } + + const desc = byName.get(body); + if (!desc) { + return `unknown pass '${body}' in ${token} (see --print-passes for the list)`; + } + if (value !== null) { + // -fno-promote= is the one valued spelling: decline + // promotion only for matching module paths + if (desc.name !== "promote" || enable) + return `pass '${desc.name}' does not take a value: ${token}`; + cfg.promote = true; + cfg.promoteExclude = value.split(",").filter((s) => s.length > 0); + } else { + cfg[desc.field] = enable; + if (desc.name === "promote") cfg.promoteExclude = []; + } + if (prov) prov.set(desc.name, token); + return null; +} + +export interface ResolvedPasses { + config: PassConfig; + // canonical name -> what decided it ("-O2 suite" or the flag token) + provenance: Map; + errors: string[]; +} + +export function resolvePassConfig(optLevel: number, flagTokens: string[]): ResolvedPasses { + const config = defaultPassConfig(optLevel); + const provenance = new Map(); + for (const p of PASSES) provenance.set(p.name, `-O${optLevel} suite`); + provenance.set("llvm-opt", `-O${optLevel} suite`); + const errors: string[] = []; + for (const token of flagTokens) { + const err = applyPassFlag(config, token, provenance); + if (err) errors.push(err); + } + return { config, provenance, errors }; +} + +// --- the per-run snapshot --------------------------------------------------- + +// the driver resolves once at startup and installs; library callers and +// the unit tests get today's default pipeline (-O2) unless they say +// otherwise. Snapshot semantics: mutate only through set/with below. +let current: PassConfig = defaultPassConfig(2); + +export function passes(): PassConfig { + return current; +} + +export function setPassConfig(cfg: PassConfig): void { + current = cfg; +} + +// tests: run f with named settings overridden, restoring on the way out +export function withPassConfig(overrides: Partial, f: () => T): T { + const prev = current; + current = { ...prev, ...overrides }; + try { + return f(); + } finally { + current = prev; + } +} + +// --- generated listings ----------------------------------------------------- + +// the --help section: one line per pass, from the registry +export function formatPassHelp(): string { + const lines: string[] = []; + lines.push("Pass flags (-f enables, -fno- disables; applied after the -O suite,"); + lines.push("last one wins). Defaults: [0] on at every level incl. -O0, [1] on at -O1+,"); + lines.push("[2] on at -O2+, [-] off unless enabled explicitly:"); + for (const p of PASSES) { + const lvl = p.minLevel === OPT_IN ? "-" : String(p.minLevel); + lines.push(` -f[no-]${p.name} [${lvl}] ${p.help}`); + } + lines.push( + " -fllvm-opt=<0..3> [=] run the LLVM pipeline at this level instead of the -O level" + ); + return lines.join("\n"); +} + +// the --print-passes listing: the effective configuration and where +// each setting came from +export function formatEffectiveConfig(r: ResolvedPasses, optLevel: number): string { + const lines: string[] = []; + lines.push(`effective pass configuration at -O${optLevel}:`); + for (const p of PASSES) { + const on = r.config[p.field]; + let state = on ? "on " : "off"; + if (p.name === "promote" && on && r.config.promoteExclude.length > 0) + state = `on (except ${r.config.promoteExclude.join(",")})`; + lines.push( + ` ${p.name.padEnd(18)} ${state.padEnd(6)} (${r.provenance.get(p.name) || "?"})` + ); + } + const llvm = r.config.llvmOpt === null ? `O${optLevel}` : `O${r.config.llvmOpt}`; + lines.push( + ` ${"llvm-opt".padEnd(18)} ${llvm.padEnd(6)} (${r.provenance.get("llvm-opt") || "?"})` + ); + return lines.join("\n"); +} + diff --git a/lib/passes/gather-imports.ts b/lib/passes/gather-imports.ts index 996d60ed..d927b1f9 100644 --- a/lib/passes/gather-imports.ts +++ b/lib/passes/gather-imports.ts @@ -21,6 +21,7 @@ import * as b from "../ast-builder"; import * as esprima from "../../external-deps/esprima/esprima-es6"; import type * as e from "../estree"; import type { CompilerOptions, ImportVariable } from "../options"; +import { passes } from "../pass-config"; import type { Triple } from "../triple"; function isNativeModule(source: string): boolean { @@ -172,13 +173,13 @@ export function dumpModules(): void { // with such a nested declaration is excluded entirely. `const name = // ` stays a plain local: it constant-folds instead. function promoteModuleVars(moduleInfo: ModuleInfo, tree: e.Program): void { - // debugging: EJS_NO_PROMOTE=substr1,substr2 disables promotion for - // matching module paths (bisecting promotion-related miscompiles) - const no_promote = process.env["EJS_NO_PROMOTE"]; - if (no_promote) { - for (const pat of no_promote.split(",")) { - if (pat.length > 0 && moduleInfo.path.indexOf(pat) !== -1) return; - } + // debugging: -fno-promote disables promotion outright; + // -fno-promote=substr1,substr2 only for matching module paths + // (bisecting promotion-related miscompiles) + const pcfg = passes(); + if (!pcfg.promote) return; + for (const pat of pcfg.promoteExclude) { + if (moduleInfo.path.indexOf(pat) !== -1) return; } // names declared by `var` nested below a direct toplevel statement // (but outside any function -- function bodies are their own scope) diff --git a/test/eir-lowtier1.js b/test/eir-lowtier1.js index 0398a89b..de71d5e4 100644 --- a/test/eir-lowtier1.js +++ b/test/eir-lowtier1.js @@ -1,4 +1,4 @@ -// Phase 2 low-tier probe. With EJS_EIR_LOWTIER=1 in the compiler's +// Phase 2 low-tier probe. With -flowtier in the compiler's // environment these function bodies are swapped for hand-built EIR // (has_tag guard -> unbox/f64 op/box fast path vs the generic slow path; // see lib/eir/lowtier-probe.ts). Without it they compile normally. diff --git a/test/types-argsink1.js b/test/types-argsink1.js index 84c3d505..3165507e 100644 --- a/test/types-argsink1.js +++ b/test/types-argsink1.js @@ -1,6 +1,6 @@ // sinking-P3 probe: rest_args/args_obj length sinking // (docs/sinking-plan.md). Every line must match node exactly, with and -// without --types and under EJS_NO_ARGS_SINK. +// without --types and under -fno-args-sink. function len0() { return arguments.length; } function len2(a, b) { return arguments.length; } diff --git a/test/types-flowsink1.js b/test/types-flowsink1.js index 0202a6f0..64a5b380 100644 --- a/test/types-flowsink1.js +++ b/test/types-flowsink1.js @@ -1,7 +1,7 @@ // sinking-P3 probe: flow-sensitive field writes + partial-escape // materialization (docs/sinking-plan.md). Every line must match node // exactly, with and without --types, under EJS_SHAPES=off, gc-stress, -// and EJS_NO_FLOW_SINK. +// and -fno-flow-sink. function branches(c, x, y) { var o = { a: 0 }; if (c) o.a = x; else o.a = y; return o.a; } console.log(branches(true, 1, 2)); diff --git a/test/types/README.md b/test/types/README.md index 24a73c5f..187d2011 100644 --- a/test/types/README.md +++ b/test/types/README.md @@ -39,7 +39,7 @@ counts has_shape diamonds the way `diamonds=N` counts has_tag ones): | types-bornshape1 | born-with-shape (P4.4): a static literal is make_object_shaped, the Pt ctor prefix is the empty-shape-guarded fill (`bornShaped=1 ctorFills=1`); keys order, `in`, growth past the born shape, and a repr-differing construction all match node | 0 | match | | types-bornshapewrong1 | P4.4 edge cases: a reused non-empty receiver (guard fails), an `in`-cut fence, a frozen receiver (runtime re-check), a proto-chain SETTER intercepting the batched store, and a non-writable proto data prop — every one routes sequential with node-identical output (`bornShaped=3 ctorFills=3 fenceDeclined=short-prefix:1`); also found the provenNumberIntrinsic const-join gap (which P4.5's typed stores later dissolved entirely) | 0 | match | | types-typedslots1 | typed slots (P4.5): the fused kernel fast on the matching shape, slow on repr-mismatched / extra-field / dictionary receivers; -0 (1/x sign), NaN, Infinity bit-survival through raw slot store→load; a mid-kernel repr-flip transition (string into an f64 field) and the boxed-field store paths (`shapeGuards=9 shapeTyped=loads:7,stores:1 bornShaped=3 ctorFills=2`); node-identical incl. under EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7 | 9 | match | -| types-bench3 | the P4.6 polymorphic microbenchmark: the bench2 kernel with two receiver classes ({x,y} / {z,x,y}) alternating at one site — the 2-way guard chain (`shapePolyGuards=4`) runs 0.31s, PARITY with the monomorphic twin, vs 1.67s declined (EJS_NO_POLY_SHAPE_GUARDS=1) and 3.64s flag-off (2026-07-24, M-series) | 4 (poly) | match | +| types-bench3 | the P4.6 polymorphic microbenchmark: the bench2 kernel with two receiver classes ({x,y} / {z,x,y}) alternating at one site — the 2-way guard chain (`shapePolyGuards=4`) runs 0.31s, PARITY with the monomorphic twin, vs 1.67s declined (-fno-poly-shape-guards) and 3.64s flag-off (2026-07-24, M-series) | 4 (poly) | match | | types-poly1 | the wrong-oracle probe for the 2-way chain: lib's oracle types sum/setx's receiver with BOTH terminal shapes from local calls (`shapePolyGuards=4 shapeTyped=loads:6,stores:2`); cross-module receivers it never saw — repr-mismatched, a third shape, dictionary-mode (post-delete) — all route through the shared slow path; identical output incl. under EJS_SHAPES=off and EJS_GC_EVERY_N_ALLOC=7 | 4 (in lib) | n/a¹ | P4.6 evidence probes (extensions measured and NOT landed; the numbers diff --git a/test/types/types-bench3.js b/test/types/types-bench3.js index 27a342e2..0ef89ed5 100644 --- a/test/types/types-bench3.js +++ b/test/types/types-bench3.js @@ -4,7 +4,7 @@ // fields at different slots). The oracle reports both terminal shapes; // the 2-way guard chain gives each class a fixed-slot fast arm. // 2026-07-24 numbers (M-series): 0.31s with the chain — parity with the -// monomorphic twin — vs 1.67s declined (EJS_NO_POLY_SHAPE_GUARDS=1) and +// monomorphic twin — vs 1.67s declined (-fno-poly-shape-guards) and // 3.64s flag-off. function P2(x, y) { this.x = x; this.y = y; } function P3(x, y, z) { this.z = z; this.x = x; this.y = y; } diff --git a/test/types/types-bench4.js b/test/types/types-bench4.js index 8346b18d..1f0c767c 100644 --- a/test/types/types-bench4.js +++ b/test/types/types-bench4.js @@ -3,7 +3,7 @@ // flow-sensitive sinking the object scalar-replaces into loop-carried // values (allocation-free, memory-op-free); without it every iteration // pays the read/write diamonds against a real heap object. A/B: -// EJS_NO_FLOW_SINK=1 at compile time. +// -fno-flow-sink at compile time. function accum(n) { var o = { sum: 0, weighted: 0, count: 0 }; var i = 0; From 9e5ac5290a92e5565281ab1501d6bdee32ad49f0 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 00:02:06 -0700 Subject: [PATCH 135/146] =?UTF-8?q?eir:=20compiler-P1.1=20=E2=80=94=20the?= =?UTF-8?q?=20test-eir=20pin=20burn-down;=20no=20optimizer=20gap?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The 11 pinned lib/eir/tests.ts failures were entirely test debt from gc-P5's flag-off born-shaped literals; the recorded "flow-sensitive sinking does not drain make_object_shaped" gap does not exist. Both shaped sinks resolve shapes through the module's shape table, and the tests' lowerAndOptimize helper dropped the module lowerOne returns, so every shaped candidate silently declined in the harness only — the real pipeline always threads the module through optimizeModule (verified end-to-end with --dump-after eir-opt: shaped literals drain). - lowerAndOptimize passes the module to optimizeFunction - op-exact matchers assertContainsOp/assertNotContainsOp (\b regex; underscore is a word char, so \bmake_object\b rejects the shaped op) - expectations moved to the born-shaped contract: literal and class-accessor lowering assert make_object_shaped + shape="…", the flag-off null-oracle test asserts all-boxed shapes, the partial-escape test finds the materialized shaped op, survival assertions op-exact Gates: test-eir all 227 pass; tsc clean; stage0-3 + shapes-off 424/21/0 every lane; lowtier e2e OK. Co-Authored-By: Claude Fable 5 --- docs/compiler-plan.md | 23 +++++++++++++-- lib/eir/tests.ts | 66 ++++++++++++++++++++++++++++++------------- 2 files changed, 67 insertions(+), 22 deletions(-) diff --git a/docs/compiler-plan.md b/docs/compiler-plan.md index 081ee0a0..a1594185 100644 --- a/docs/compiler-plan.md +++ b/docs/compiler-plan.md @@ -96,7 +96,7 @@ shaped-world continuation), shape-guard regions (see shapes-plan). 0` tag-compare quirk to work under self-host); generator suspension makes "stable" slots unstable mid-activation — suspendable functions decline the CSE exemptions. -- [ ] **compiler-P1.1 — test-eir debt from flag-off born-shaped +- [x] **compiler-P1.1 — test-eir debt from flag-off born-shaped literals.** Found RED at runtime-P4 (P6.3) entry, 2026-07-29: 11 lib/eir/tests.ts failures, pre-existing (reproduce from sources untouched by that phase). Three classes: (a) stale @@ -111,7 +111,26 @@ shaped-world continuation), shape-guard regions (see shapes-plan). `make_object_shaped`, so those assertions can't distinguish the two ops. Fix the sinking gap (or decide it's deferred and assert the shaped alloc form), then repair the expectations - with substring-safe matchers. + with substring-safe matchers. DONE 2026-07-30. The (b) + diagnosis was wrong — there is NO optimizer gap: both shaped + sinks (`sinkShapedAlloc`, `sinkFlowAllocations`) resolve the + shape through the module's shape table, and the tests' helper + `lowerAndOptimize` discarded the module `lowerOne` returns, so + every shaped candidate silently declined *in the harness + only*. The real pipeline always threads the module + (`optimizeModule` → `optimizeFunction(fn, m, …)`); a stage1 + `--dump-after eir-opt` probe confirmed non-escaping and + written shaped literals drain end-to-end. Fixes (all + tests.ts): `lowerAndOptimize` passes the module; op-exact + matchers `assertContainsOp`/`assertNotContainsOp` (word- + boundary regex — underscore is a word character, so + `\bmake_object\b` rejects `make_object_shaped`); expectations + moved to the born-shaped contract (literal + class-accessor + lowering assert `make_object_shaped shape="…"`, the flag-off + test asserts all-boxed shapes, the escape-materialization test + looks for the materialized shaped op, decline/refusal survival + assertions are op-exact). Gates: test-eir all 227 pass, tsc + clean, stage0-3 + shapes-off 424/21/0 every lane, lowtier OK. - [x] **compiler-P2 — TypeScript port of the compiler.** The compiler converts from JS to TypeScript (largely done for lib/eir/ and lib/*.ts — the strict-TS conversion landed with the EIR work); diff --git a/lib/eir/tests.ts b/lib/eir/tests.ts index 8b89edf4..aa2713c1 100644 --- a/lib/eir/tests.ts +++ b/lib/eir/tests.ts @@ -56,6 +56,23 @@ function assertContains(haystack: string, needle: string): void { throw new Error(`expected output to contain '${needle}'\n---\n${haystack}\n---`); } +// op-exact matchers: `make_object` must not substring-match +// `make_object_shaped` (underscore is a word character, so \b after the +// op name rejects the longer op) +function containsOp(haystack: string, op: string): boolean { + return new RegExp("\\b" + op + "\\b").test(haystack); +} + +function assertContainsOp(haystack: string, op: string): void { + if (!containsOp(haystack, op)) + throw new Error(`expected output to contain op '${op}'\n---\n${haystack}\n---`); +} + +function assertNotContainsOp(haystack: string, op: string): void { + if (containsOp(haystack, op)) + throw new Error(`expected output to NOT contain op '${op}'\n---\n${haystack}\n---`); +} + function findBlock(fn: Func, prefix: string): Block { for (let b of fn.blocks) if (b.name.indexOf(prefix) === 0) return b; throw new Error(`no block named ${prefix}* in @${fn.name}`); @@ -314,8 +331,10 @@ test("lower: array and object literals", () => { let { fn } = lowerOne("function lit() { return [1, 2, { a: 3, b: 4 }]; }"); let printed = printFunction(fn); assertContains(printed, "make_array"); - assertContains(printed, 'make_object'); - assertContains(printed, 'keys=["a", "b"]'); + // static-key literals are born with their shape (all-boxed reprs + // without an oracle) + assertContainsOp(printed, "make_object_shaped"); + assertContains(printed, 'shape="a:boxed,b:boxed"'); }); test("lower: this expression", () => { @@ -540,7 +559,7 @@ test("lower: new.target lowers to new_target", () => { assertContains(printFunction(r.fn), "new_target"); }); -test("lower: class accessors lower via make_object + defineProperties", () => { +test("lower: class accessors lower via make_object_shaped + defineProperties", () => { let r = lowerFunctionNode( parseFnPreEIR( "function f() { class T { get n() { return 1; } set n(v) { this._x = v; } } return new T(); }" @@ -549,8 +568,9 @@ test("lower: class accessors lower via make_object + defineProperties", () => { verifyModule(r.module); let all = r.module.functions.map((fn) => printFunction(fn)).join("\n"); // one property entry carrying BOTH accessors (the get/set pair shares - // a make_object with keys get,set) - assertContains(all, 'keys=["get", "set"]'); + // a descriptor literal with fields get,set) + assertContains(all, 'shape="get:boxed,set:boxed"'); + assertContains(all, 'atom="defineProperties"'); }); test("lower: array destructuring lowers via %createIteratorWrapper", () => { @@ -830,8 +850,11 @@ function assertNotContains(haystack: string, needle: string): void { } function lowerAndOptimize(src: string): { fn: Func; printed: string } { - let { fn } = lowerOne(src); - optimizeFunction(fn); + // the module must ride along: flag-off lowering mints + // make_object_shaped for static-key literals, and both shaped sinks + // resolve the shape through the module's shape table + let { module, fn } = lowerOne(src); + optimizeFunction(fn, module); verifyFunction(fn); return { fn, printed: printFunction(fn) }; } @@ -853,7 +876,7 @@ test("optimize: duplicate literal keys fold to the last definition", () => { test("optimize: escaping object literal is untouched", () => { let { printed } = lowerAndOptimize("function f(g) { let o = { a: 1 }; g(o); return o.a; }"); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); assertContains(printed, 'get_prop_atom'); }); @@ -882,14 +905,14 @@ test("optimize: -fno-flow-sink restores the written-key decline", () => { let { printed } = lowerAndOptimize( "function f(x) { let o = { a: 1 }; o.a = x; return o.a; }" ); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); assertContains(printed, "get_prop_atom"); }); }); test("optimize: non-own-key read keeps the object (prototype chain)", () => { let { printed } = lowerAndOptimize("function f() { let o = { a: 1 }; return o.toString; }"); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); }); test("optimize: array literal const-index and length reads fold", () => { @@ -929,14 +952,14 @@ test("optimize: object flowing into a block param is an escape", () => { let { printed } = lowerAndOptimize( "function f(c) { let o = c ? { a: 1 } : { a: 2 }; return o.a; }" ); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); }); test("optimize: reads inside try (unwind targets) are left alone", () => { let { printed } = lowerAndOptimize( "function f() { let o = { a: 1 }; try { return o.a; } catch (e) { return 0; } }" ); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); assertContains(printed, "get_prop_atom"); }); @@ -2838,15 +2861,18 @@ test("born-shaped: a static literal lowers to make_object_shaped under --types", "function f(a) { return { x: 1, y: a }; }", stubOracle({ a: ["number"] }) ); - assertContains(printed, "make_object_shaped"); + assertContainsOp(printed, "make_object_shaped"); assertContains(printed, 'shape="x:f64,y:f64"'); - assertNotContains(printed, "make_object "); + assertNotContainsOp(printed, "make_object"); }); -test("born-shaped: flag-off (null oracle) keeps today's make_object exactly", () => { +test("born-shaped: flag-off (null oracle) mints all-boxed shapes", () => { + // keys are static truth, so a null oracle still lowers born-shaped + // (gc-P5 part 2) — the reprs just stay boxed without type evidence const { printed } = lowerWithOracle("function f(a) { return { x: 1, y: a }; }", null); - assertNotContains(printed, "make_object_shaped"); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); + assertContains(printed, 'shape="x:boxed,y:boxed"'); + assertNotContainsOp(printed, "make_object"); }); test("born-shaped: -fno-born-shaped restores make_object", () => { @@ -3293,11 +3319,11 @@ test("sink-flow: single escape materializes at the escape site", () => { let { fn, printed } = lowerAndOptimize( "function f(g, x) { let o = { a: 1 }; o.a = x; g(o); return 0; }" ); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); assertNotContains(printed, "set_prop_atom"); // the materialized literal's operand is the written value (param x) let made: Inst | null = null; - fn.forEachInst((i) => { if (i.op === "make_object") made = i; }); + fn.forEachInst((i) => { if (i.op === "make_object_shaped") made = i; }); assert(made!.operands[0]!.op === "blockparam", "materialized field should be the written x"); }); @@ -3325,7 +3351,7 @@ test("sink-flow: a catch block in the rename region declines", () => { let { printed } = lowerAndOptimize( "function f(x) { let o = { a: 1 }; try { o.a = x; } catch (e) { } return o.a; }" ); - assertContains(printed, "make_object"); + assertContainsOp(printed, "make_object_shaped"); }); test("sink-flow: shaped partial escape materializes a shaped literal", () => { From 4ea98dff8b483949cc1dd14b43b1c668b062db91 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 10:39:39 -0700 Subject: [PATCH 136/146] =?UTF-8?q?eir:=20release-P1=20(P9.1)=20=E2=80=94?= =?UTF-8?q?=20relocatable=20dist=20artifact=20+=20LLVM=20toolchain=20polic?= =?UTF-8?q?y?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit //:dist repacks the srcdir-tree + stage2 exe into the installed layout the driver's non---srcdir mode expects (bin/ejs, include/, lib/ archives, node-compat manifest+module); //:test-dist smoke-tests it as a user would (no --srcdir, plus the fail-loudly negative case); CI builds both and uploads per-platform tarballs. The driver now discovers its opt/llc instead of trusting a baked absolute path: LLVM_MAJOR is baked into host-config at build time, and llvm_bindir() resolves env override -> baked bindir -> conventional locations -> PATH, verifying each candidate's `opt --version` major before use — a mismatched opt miscompiles silently (the llvm@16 lesson), so no match means a loud, actionable failure. EJS_LLVM_NO_VERSION_CHECK=1 is the debugging-only escape; the unused llvm-as table entry is gone. docs/release-p1-results.md has the details and follow-ons. Co-Authored-By: Claude Fable 5 --- .github/workflows/ci.yml | 26 ++++++ BUCK | 30 +++++++ buck-dist.sh | 83 +++++++++++++++++++ buck-test-dist.sh | 89 +++++++++++++++++++++ docs/plans.md | 8 +- docs/release-p1-results.md | 103 ++++++++++++++++++++++++ docs/release-plan.md | 3 +- ejs-es6.ts | 158 +++++++++++++++++++++++++++++++------ lib/BUCK | 9 ++- lib/host-config.d.ts | 3 + lib/host-config.js.in | 1 + 11 files changed, 484 insertions(+), 29 deletions(-) create mode 100644 buck-dist.sh create mode 100644 buck-test-dist.sh create mode 100644 docs/release-p1-results.md diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 3257c515..441874ce 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -73,6 +73,20 @@ jobs: //:test-stage2 \ //:test-stage3 + # the relocatable dist artifact + its installed-layout smoke test + # (release-P1); the stage builds above are shared, so this only + # adds the repack + smoke compile + - name: dist artifact + run: | + buck2 build //:test-dist + buck2 build //:dist --out dist-out/ + + - uses: actions/upload-artifact@v4 + with: + name: echojs-dist-macos-arm64 + path: dist-out/*.tar.gz + if-no-files-found: error + - name: Surface test logs on failure if: failure() run: | @@ -139,3 +153,15 @@ jobs: //:test-stage1 \ //:test-stage2 \ //:test-stage3 + + # release-P1 — see the macOS job's note + - name: dist artifact + run: | + buck2 build --config llvm.prefix=/usr/lib/llvm-22 //:test-dist + buck2 build --config llvm.prefix=/usr/lib/llvm-22 //:dist --out dist-out/ + + - uses: actions/upload-artifact@v4 + with: + name: echojs-dist-linux-${{ matrix.arch }} + path: dist-out/*.tar.gz + if-no-files-found: error diff --git a/BUCK b/BUCK index 4e14a5c5..1eafdb28 100644 --- a/BUCK +++ b/BUCK @@ -87,6 +87,36 @@ alias( actual = ":ejs.exe.stage1", ) +# the relocatable dist artifact (release-P1): the installed layout the +# driver's non---srcdir mode expects, tarred up. The stage2 binary is +# the one the bootstrap fixed point (stage3) vouches for. +# buck2 build //:dist +genrule( + name = "dist", + srcs = [ + "buck-dist.sh", + "package.json", + "LICENSE.txt", + ], + out = "dist", + cmd = 'bash $SRCDIR/buck-dist.sh "$(location :srcdir-tree)" ' + + '"$(location :ejs.exe.stage2)"' + + ' "' + EJS_TRIPLE + '"' + + ' "' + EJS_SHORT_TRIPLE + '"' + + ' "' + EJS_OS + '"' + + ' "$SRCDIR/package.json" "$SRCDIR/LICENSE.txt"', +) + +# smoke-test the dist artifact as a user would use it: unpack, compile +# and run programs WITHOUT --srcdir, and check the fail-loudly LLVM +# policy. buck2 build //:test-dist +genrule( + name = "test-dist", + srcs = ["buck-test-dist.sh"], + out = "test-dist.log", + cmd = 'bash $SRCDIR/buck-test-dist.sh "$(location :dist)" ' + llvm_bindir(), +) + # EIR unit tests (run under node against the generated CommonJS tree): # buck2 build //:test-eir genrule( diff --git a/buck-dist.sh b/buck-dist.sh new file mode 100644 index 00000000..27089611 --- /dev/null +++ b/buck-dist.sh @@ -0,0 +1,83 @@ +#!/bin/bash +# Invoked by //:dist. Repacks the --srcdir tree (whose libraries the +# bootstrap matrix already proved) plus the stage2 executable into the +# relocatable installed layout the driver's non---srcdir mode expects: +# +# bin/ejs the self-hosted compiler (stage2) +# include/*.h runtime headers (-I at the final link) +# lib//libecho.a runtime + pcre + double-conversion +# lib//libpcre16.a +# lib//libdouble-conversion.a +# lib/node-compat.ejs native-module manifest +# lib//libejsnodecompat-module.a +# +# The LLVM tools are NOT vendored: the driver discovers a matching-major +# opt/llc at runtime and fails loudly otherwise (the release-P1 policy; +# see the llvm_bindir() resolution in ejs-es6.ts). +# +# $OUT is a directory holding echojs--.tar.gz +# (version isn't knowable at buck analysis time, so the tarball name +# can't be the genrule out itself). +set -euo pipefail + +TREE="$1" # //:srcdir-tree +EXE="$2" # //:ejs.exe.stage2 +TRIPLE="$3" # Triple.toString(), e.g. arm64-apple-macos +SHORT_TRIPLE="$4" # Triple.toShortString(), e.g. arm64-macos +OSNAME="$5" # macos | linux +PKG_JSON="$6" # //:package.json (version source until release-P3) +LICENSE="$7" # LICENSE.txt + +VERSION="$(sed -n 's/.*"version": *"\([^"]*\)".*/\1/p' "$PKG_JSON" | head -1)" +test -n "$VERSION" + +NAME="echojs-$VERSION-$SHORT_TRIPLE" +mkdir -p "$OUT" +ROOT="$TMP/$NAME" +rm -rf "$ROOT" +mkdir -p "$ROOT/bin" "$ROOT/include" "$ROOT/lib/$TRIPLE" "$ROOT/lib/$SHORT_TRIPLE" + +cp "$EXE" "$ROOT/bin/ejs" +chmod +x "$ROOT/bin/ejs" + +# headers: the srcdir tree keeps them at runtime/*.h +cp "$TREE"/runtime/*.h "$ROOT/include/" + +# link-time libraries, in the exact paths target_libecho()/ +# target_extra_libs() resolve relative to bin/ejs +cp "$TREE/runtime/out/$TRIPLE/libecho.a" "$ROOT/lib/$TRIPLE/libecho.a" +cp "$TREE/external-deps/pcre-$OSNAME/.libs/libpcre16.a" "$ROOT/lib/$TRIPLE/libpcre16.a" +cp "$TREE/external-deps/double-conversion-$OSNAME/double-conversion/libdouble-conversion.a" \ + "$ROOT/lib/$TRIPLE/libdouble-conversion.a" + +# the node-compat native module: manifest scanned from lib/, archive +# from lib/-/ (do_final_link's non---srcdir module path). +# ejs-llvm is deliberately left out: its manifest bakes the build +# machine's `llvm-config --ldflags --libs`, and only the bootstrap +# imports @llvm (reusable native modules are compiler-P4 / P9.5). +cp "$TREE/node-compat/node-compat.ejs" "$ROOT/lib/node-compat.ejs" +cp "$TREE/node-compat/libejsnodecompat-module.a" "$ROOT/lib/$SHORT_TRIPLE/libejsnodecompat-module.a" + +cp "$LICENSE" "$ROOT/LICENSE.txt" + +cat > "$ROOT/README.md" < "$OUT" + +WORK="$TMP/dist-test" +rm -rf "$WORK" +mkdir -p "$WORK" + +TARBALL="$(echo "$DIST"/echojs-*.tar.gz)" +test -f "$TARBALL" +tar -C "$WORK" -xzf "$TARBALL" +ROOT="$(echo "$WORK"/echojs-*)" +test -x "$ROOT/bin/ejs" +log "unpacked $(basename "$TARBALL")" + +# the final link wants a C++ driver; on macos use Apple clang++ so SDK +# discovery works (same as buck-stage.sh) +if [ "$(uname -s)" = "Darwin" ]; then + export CXX="${CXX:-/usr/bin/clang++}" + export SDKROOT="${SDKROOT:-$(/usr/bin/xcrun --show-sdk-path)}" +fi + +cd "$WORK" + +# 1: a plain program, no imports +cat > hello.js <<'EOF' +class Greeter { + constructor(who) { this.who = who; } + greet() { return `hello, ${this.who}`; } +} +let parts = ["from", "the", "installed", "echojs"].map((w) => w); +console.log(new Greeter(parts.join(" ")).greet()); +EOF +"$ROOT/bin/ejs" -q -o hello.exe hello.js >> "$OUT" 2>&1 +actual="$(./hello.exe)" +expected="hello, from the installed echojs" +if [ "$actual" != "$expected" ]; then + log "FAIL hello: got '$actual', want '$expected'" + exit 1 +fi +log "PASS hello" + +# 2: a program importing the node-compat native module (exercises the +# lib/ manifest scan + lib// module archive) +cat > pathtest.js <<'EOF' +import * as path from "@node-compat/path"; +console.log(path.basename(path.join("/a/b", "c.js"))); +EOF +"$ROOT/bin/ejs" -q -o pathtest.exe pathtest.js >> "$OUT" 2>&1 +actual="$(./pathtest.exe)" +if [ "$actual" != "c.js" ]; then + log "FAIL pathtest: got '$actual', want 'c.js'" + exit 1 +fi +log "PASS pathtest" + +# 3: the fail-loudly policy: pointed at a bindir with no LLVM, the +# driver must refuse (mentioning the required major), not miscompile +rm -f nollvm.exe +set +e +LLVM_BINDIR=/nonexistent "$ROOT/bin/ejs" -q -o nollvm.exe hello.js > nollvm.log 2>&1 +status=$? +set -e +cat nollvm.log >> "$OUT" +if [ "$status" -eq 0 ] || [ -f nollvm.exe ]; then + log "FAIL nollvm: expected a loud failure, got exit $status" + exit 1 +fi +if ! grep -q "requires LLVM" nollvm.log; then + log "FAIL nollvm: no version-policy message in the failure output" + exit 1 +fi +log "PASS nollvm (exit $status)" + +log "test-dist OK" diff --git a/docs/plans.md b/docs/plans.md index 0d165fcf..9d426c4e 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -153,8 +153,12 @@ Catch up with the language; adopt test262. Detail: language-plan.md. From repo to product. Detail: release-plan.md, compiler-plan.md. -- [ ] **P9.1** relocatable dist artifact + LLVM toolchain policy - (release-P1). +- [x] **P9.1** relocatable dist artifact + LLVM toolchain policy + (release-P1). DONE 2026-07-30 — docs/release-p1-results.md + (`//:dist` tarball of the installed layout, `//:test-dist` smoke + test, CI uploads per-platform artifacts; the driver discovers a + matching-major opt/llc and fails loudly otherwise, LLVM_MAJOR + baked into host-config). - [ ] **P9.2** platform packages: homebrew, linux, npm wrapper (release-P2). - [ ] **P9.3** versioning + release automation off the bootstrap diff --git a/docs/release-p1-results.md b/docs/release-p1-results.md new file mode 100644 index 00000000..fd4ae774 --- /dev/null +++ b/docs/release-p1-results.md @@ -0,0 +1,103 @@ +# release-P1 results: relocatable dist artifact + LLVM toolchain policy + +Status: DONE 2026-07-30 (P9.1 in plans.md). + +## What an installed echojs IS + +The driver always had a latent installed layout (every non-`--srcdir` +path in ejs-es6.ts); release-P1 makes it a real, shippable artifact: + + echojs--/ + bin/ejs the self-hosted compiler (stage2) + include/*.h runtime headers (-I at final link) + lib//libecho.a merged runtime archive + lib//libpcre16.a + lib//libdouble-conversion.a + lib/node-compat.ejs native-module manifest (lib/ is + lib//libejsnodecompat-module.a the moduledir) + LICENSE.txt, README.md + +`buck2 build //:dist` produces the tarball (in an out *directory*, +since the version isn't knowable at analysis time; version comes from +package.json until release-P3 owns versioning). `buck-dist.sh` repacks +`//:srcdir-tree` — the same bits the bootstrap matrix proves — plus the +stage2 executable, which the stage3 fixed point vouches for. + +Deliberately excluded: the ejs-llvm module. Its manifest bakes the +build machine's `llvm-config --ldflags --libs`, and only the bootstrap +imports `@llvm`; reusable native modules are compiler-P4 (P9.5). + +## LLVM toolchain policy: discover, verify, fail loudly + +The dist can't vendor `opt`/`llc` (~100MB+ per platform) and can't +trust the baked build-machine bindir (on a user's machine that path may +hold a different major — and the llvm@16-on-PATH incident showed a +mismatched `opt` miscompiles *silently*: llvm-22 module-init stores +became `unreachable` traps with exit code 0). So: + +- `//lib:host-config.js` now bakes `LLVM_MAJOR` (from `llvm-config + --version` at build time) alongside `LLVM_BINDIR`. +- The driver resolves the tool bindir lazily (first compile, so + `--help` never probes), in order: + 1. `LLVM_BINDIR` env — explicit override, `""` = plain PATH; still + version-checked, `EJS_LLVM_NO_VERSION_CHECK=1` forces past it; + 2. the baked build-machine bindir; + 3. conventional locations (`/opt/homebrew/opt/llvm{@N,}/bin`, + `/usr/local/opt/llvm{@N,}/bin` on macos; `/usr/lib/llvm-N/bin` on + linux), then bare PATH. +- Every candidate is verified by parsing `LLVM version (\d+)` out of + `opt --version`; the first matching-major candidate wins; if none + match the driver exits with an actionable message (what it tried, + what each had, how to install/point at LLVM N). +- The probe captures output via `sh -c '... > tmpfile'` + + `readFileSync` — the one capture mechanism the node-hosted and + self-hosted drivers share (self-hosted `spawn` returns only the exit + status). +- The never-spawned `llvm-as` entry in the tool table is gone. + +Verified by hand: baked-path success; `LLVM_BINDIR=/nonexistent` fails +loudly (exit 255, names the required major); `LLVM_BINDIR=""` with no +opt on PATH fails loudly; with llvm on PATH succeeds; the +no-version-check escape reaches the tool spawn and fails there via +spawnSyncChecked (pre-existing behavior). + +## Smoke test + +`buck2 build //:test-dist` unpacks the tarball into scratch and, with +the build LLVM *off* PATH (discovery must work as a user's machine +would): + +1. compiles + runs a no-import program (classes, template strings, + arrow lambdas) — output checked; +2. compiles + runs a `@node-compat/path` import — exercises the lib/ + manifest scan and the `lib//` module archive; +3. asserts the fail-loudly path: `LLVM_BINDIR=/nonexistent` must exit + nonzero with the version-policy message and produce no executable. + +## CI + +Both jobs build `//:test-dist` then `//:dist --out` (the stage builds +are shared, so this adds only the repack + smoke compile) and upload +the tarball: `echojs-dist-macos-arm64`, `echojs-dist-linux-{arm64,x86_64}`. + +## Gates + +- tsc typechecks clean (tsconfig.json + test --noEmit) +- `//:test-eir` green +- full matrix `//:test-stage{0,1,2,3}` + shapes-off + lowtier green +- `//:dist` + `//:test-dist` green + +## Follow-ons + +- The runtime's EXCEPTIONS spew (ejs-exception) is noisy on stderr + during every native-module import resolution — cosmetic, pre-existing, + but every dist user compiling an `@node-compat` import sees it. + Worth silencing before release-P2. +- `bin/ejs` ships unstripped (~debug-sized); strip at dist time once a + symbol-preservation story exists. +- Linux compiled programs need libuv/libunwind dev packages at link + time; the README documents it, release-P2 packaging should depend on + them properly. +- macOS ld warns that dist archives (built for the SDK, 15.7) are newer + than the default `-mmacosx-version-min` (osx_min 11.0 → linked 15.0 + objects); pre-existing in srcdir mode too, harmless but noisy. diff --git a/docs/release-plan.md b/docs/release-plan.md index a08a2874..3334bab2 100644 --- a/docs/release-plan.md +++ b/docs/release-plan.md @@ -7,7 +7,8 @@ answer for people who just want to download a package and go. ## Phases -- [ ] **release-P1 — Relocatable binary artifact.** Define what an +- [x] **release-P1 — Relocatable binary artifact.** DONE 2026-07-30 — + docs/release-p1-results.md. Define what an installed echojs IS: the `ejs` driver binary, the runtime static libraries (`libecho.a` + friends), the srcdir headers/manifests the driver needs, and a pinned LLVM toolchain policy (today the diff --git a/ejs-es6.ts b/ejs-es6.ts index bf2ccf90..8704989f 100644 --- a/ejs-es6.ts +++ b/ejs-es6.ts @@ -21,6 +21,7 @@ import { Triple } from "./lib/triple"; import { LLVM_SUFFIX as DEFAULT_LLVM_SUFFIX, LLVM_BINDIR as DEFAULT_LLVM_BINDIR, + LLVM_MAJOR as EXPECTED_LLVM_MAJOR, RUNLOOP_IMPL as DEFAULT_RUNLOOP_IMPL, } from "./lib/host-config"; import { @@ -552,20 +553,127 @@ function target_path_prepend(triple: TripleT): string { } const llvm_suffix = process.env["LLVM_SUFFIX"] || DEFAULT_LLVM_SUFFIX; -// spawn the llvm tools from the bindir this compiler was BUILT against -// (baked into host-config from the buck llvm.prefix config) rather than -// whatever PATH resolves: a different-major `opt` reading our bitcode -// doesn't fail loudly — llvm@16 turned llvm-22 module-init stores into -// `unreachable` traps with exit code 0. LLVM_BINDIR in the environment -// overrides the baked path; setting it to "" restores plain PATH lookup. -const llvm_bindir = process.env["LLVM_BINDIR"] ?? DEFAULT_LLVM_BINDIR; -const llvm_tool = (tool: string): string => - llvm_bindir ? path.join(llvm_bindir, tool + llvm_suffix) : tool + llvm_suffix; -const llvm_commands = { - opt: llvm_tool("opt"), - llc: llvm_tool("llc"), - "llvm-as": llvm_tool("llvm-as"), -} as const; + +// The LLVM toolchain policy (release-P1): spawn opt/llc only from a +// bindir whose major version matches the one this compiler was BUILT +// against (baked into host-config) — a different-major `opt` reading +// our bitcode doesn't fail loudly; llvm@16 turned llvm-22 module-init +// stores into `unreachable` traps with exit code 0. Resolution order: +// 1. LLVM_BINDIR in the environment ("" = plain PATH lookup) — the +// explicit override, still version-checked; +// 2. the baked build-machine bindir; +// 3. conventional install locations for the host os, then PATH. +// Every candidate is verified by running `opt --version`; if nothing +// compatible is found the driver fails loudly instead of miscompiling. +// EJS_LLVM_NO_VERSION_CHECK=1 skips the probe (debugging only). + +// capture `opt --version` through a shell redirect to a temp file: the +// self-hosted spawn is synchronous and returns only the exit status, so +// this is the one output-capture mechanism both hosts share +function probeLlvmMajor(opt_path: string): string | null { + const probe_file = `${os.tmpdir()}/${genFreshFileName("ejs-llvm-probe")}.txt`; + temp_files.push(probe_file); + const sh_cmd = `"${opt_path}" --version > "${probe_file}" 2>&1`; + let status: number; + if (isNode()) { + status = child_process.spawnSync("/bin/sh", ["-c", sh_cmd]).status ?? -1; + } else { + status = spawn("/bin/sh", ["-c", sh_cmd]) as unknown as number; + } + if (status !== 0) return null; + let version_text: string; + try { + version_text = fs.readFileSync(probe_file, "utf-8").toString(); + } catch (e) { + return null; + } + const m = version_text.match(/LLVM version (\d+)\./); + return m ? m[1]! : null; +} + +function llvm_bindir_candidates(): string[] { + const candidates = [DEFAULT_LLVM_BINDIR]; + if (host_triple.os === "macos") { + for (const prefix of ["/opt/homebrew/opt", "/usr/local/opt"]) { + candidates.push(`${prefix}/llvm@${EXPECTED_LLVM_MAJOR}/bin`); + candidates.push(`${prefix}/llvm/bin`); + } + } else if (host_triple.os === "linux") { + candidates.push(`/usr/lib/llvm-${EXPECTED_LLVM_MAJOR}/bin`); + } + candidates.push(""); // last resort: whatever PATH resolves + return candidates.filter((c, i) => candidates.indexOf(c) === i); +} + +let resolved_llvm_bindir: string | undefined; +function llvm_bindir(): string { + if (resolved_llvm_bindir !== undefined) return resolved_llvm_bindir; + const opt_name = "opt" + llvm_suffix; + const opt_in = (bindir: string): string => (bindir ? path.join(bindir, opt_name) : opt_name); + const env_bindir = process.env["LLVM_BINDIR"]; + const skip_check = process.env["EJS_LLVM_NO_VERSION_CHECK"] === "1"; + + if (env_bindir !== undefined) { + if (!skip_check) { + const found = probeLlvmMajor(opt_in(env_bindir)); + if (found !== EXPECTED_LLVM_MAJOR) { + console.warn( + `error: LLVM_BINDIR=${env_bindir || "(PATH lookup)"} provides ${ + found === null ? `no working ${opt_name}` : `LLVM ${found}` + }; this compiler requires LLVM ${EXPECTED_LLVM_MAJOR}.` + ); + console.warn( + `a mismatched opt/llc can miscompile silently; set EJS_LLVM_NO_VERSION_CHECK=1 to force (debugging only).` + ); + process.exit(-1); + } + } + resolved_llvm_bindir = env_bindir; + return resolved_llvm_bindir; + } + + if (skip_check) { + resolved_llvm_bindir = DEFAULT_LLVM_BINDIR; + return resolved_llvm_bindir; + } + + const tried: string[] = []; + for (const candidate of llvm_bindir_candidates()) { + if (candidate !== "") { + let present = false; + try { + present = fs.statSync(opt_in(candidate)).isFile(); + } catch (e) { + // missing is the common case; fall through + } + if (!present) { + tried.push(`${candidate} (no ${opt_name})`); + continue; + } + } + const found = probeLlvmMajor(opt_in(candidate)); + if (found === EXPECTED_LLVM_MAJOR) { + resolved_llvm_bindir = candidate; + return resolved_llvm_bindir; + } + tried.push(`${candidate || "$PATH"} (${found === null ? `no working ${opt_name}` : `LLVM ${found}`})`); + } + + console.warn( + `error: could not find the LLVM ${EXPECTED_LLVM_MAJOR} tools (${opt_name}, llc${llvm_suffix}) this compiler requires.` + ); + for (const t of tried) console.warn(` tried: ${t}`); + console.warn( + `install LLVM ${EXPECTED_LLVM_MAJOR} (macos: \`brew install llvm@${EXPECTED_LLVM_MAJOR}\`; linux: https://apt.llvm.org) or set LLVM_BINDIR to its bin directory.` + ); + process.exit(-1); + throw new Error("unreachable"); +} + +const llvm_tool = (tool: string): string => { + const bindir = llvm_bindir(); + return bindir ? path.join(bindir, tool + llvm_suffix) : tool + llvm_suffix; +}; // the self-hosted runtime's spawn is synchronous and returns the child's // exit status (a number); node's returns a ChildProcess. This helper is @@ -663,35 +771,37 @@ function compileFile( module_toplevel: (compiled_module as unknown as { toplevel_name: string }).toplevel_name, }); + const opt_cmd = llvm_tool("opt"); + const llc_cmd = llvm_tool("llc"); if (!isNode()) { // in ejs spawn is synchronous. - spawnSyncChecked(llvm_commands["opt"], opt_args); - spawnSyncChecked(llvm_commands["llc"], llc_args); + spawnSyncChecked(opt_cmd, opt_args); + spawnSyncChecked(llc_cmd, llc_args); o_filenames.push(o_filename); compileCallback(); } else { - debug.log(1, `executing '${llvm_commands["opt"]} ${opt_args.join(" ")}'`); - let opt = spawn(llvm_commands["opt"], opt_args); + debug.log(1, `executing '${opt_cmd} ${opt_args.join(" ")}'`); + let opt = spawn(opt_cmd, opt_args); opt.stderr.on("data", (data) => console.warn(`${data}`)); opt.on("error", (err) => { - console.warn(`error executing ${llvm_commands["opt"]}: ${err}`); + console.warn(`error executing ${opt_cmd}: ${err}`); process.exit(-1); }); opt.on("exit", (code) => { if (code !== 0) { - console.warn(`${llvm_commands["opt"]} failed (exit status ${code})`); + console.warn(`${opt_cmd} failed (exit status ${code})`); process.exit(-1); } - debug.log(1, `executing '${llvm_commands["llc"]} ${llc_args.join(" ")}'`); - let llc = spawn(llvm_commands["llc"], llc_args); + debug.log(1, `executing '${llc_cmd} ${llc_args.join(" ")}'`); + let llc = spawn(llc_cmd, llc_args); llc.stderr.on("data", (data) => console.warn(`${data}`)); llc.on("error", (err) => { - console.warn(`error executing ${llvm_commands["llc"]}: ${err}`); + console.warn(`error executing ${llc_cmd}: ${err}`); process.exit(-1); }); llc.on("exit", (code) => { if (code !== 0) { - console.warn(`${llvm_commands["llc"]} failed (exit status ${code})`); + console.warn(`${llc_cmd} failed (exit status ${code})`); process.exit(-1); } o_filenames.push(o_filename); diff --git a/lib/BUCK b/lib/BUCK index 5d7efcbb..16c2e91b 100644 --- a/lib/BUCK +++ b/lib/BUCK @@ -1,11 +1,16 @@ -load("//:defs.bzl", "EJS_RUNLOOP_IMPL", "llvm_bindir", "llvm_suffix") +load("//:defs.bzl", "EJS_RUNLOOP_IMPL", "llvm_bin", "llvm_bindir", "llvm_suffix") genrule( name = "host-config.js", srcs = ["host-config.js.in"], out = "host-config.js", - cmd = 'sed -e "s,@LLVM_SUFFIX@,' + llvm_suffix() + ',g" ' + + # LLVM_MAJOR: the major version of the toolchain this compiler is + # built against, baked in so the driver can refuse a mismatched + # opt/llc at runtime (the llvm@16-on-PATH miscompile was silent) + cmd = 'set -e; LLVM_MAJOR="`' + llvm_bin("llvm-config") + ' --version | cut -d. -f1`"; ' + + 'sed -e "s,@LLVM_SUFFIX@,' + llvm_suffix() + ',g" ' + '-e "s,@LLVM_BINDIR@,' + llvm_bindir() + ',g" ' + + '-e "s,@LLVM_MAJOR@,$LLVM_MAJOR,g" ' + '-e "s,@RUNLOOP_IMPL@,' + EJS_RUNLOOP_IMPL + ',g" ' + "$SRCDIR/host-config.js.in > $OUT", visibility = ["PUBLIC"], diff --git a/lib/host-config.d.ts b/lib/host-config.d.ts index bfd1456b..69c3e294 100644 --- a/lib/host-config.d.ts +++ b/lib/host-config.d.ts @@ -2,4 +2,7 @@ // host-config.js.in and the //lib:host-config.js genrule) export const LLVM_SUFFIX: string; export const LLVM_BINDIR: string; +// major version of the LLVM the compiler was built against ("22"); +// the driver refuses to spawn a different major's opt/llc +export const LLVM_MAJOR: string; export const RUNLOOP_IMPL: string; diff --git a/lib/host-config.js.in b/lib/host-config.js.in index 6fb37cf4..40833a6f 100644 --- a/lib/host-config.js.in +++ b/lib/host-config.js.in @@ -1,3 +1,4 @@ export let LLVM_SUFFIX = '@LLVM_SUFFIX@'; export let LLVM_BINDIR = '@LLVM_BINDIR@'; +export let LLVM_MAJOR = '@LLVM_MAJOR@'; export let RUNLOOP_IMPL = '@RUNLOOP_IMPL@'; From 168ca1f22e7bf1e0b171cb733fba96dd46102396 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 14:08:30 -0700 Subject: [PATCH 137/146] =?UTF-8?q?eir:=20release-P1=20follow-on=20?= =?UTF-8?q?=E2=80=94=20silence=20the=20hardcoded=20exception=20spew?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit runtime/ejs-exception.c had `#define spew 1` baked in, so every compiled program logged the full throw/unwind/catch trace (plus the thrown value) to stderr — visible on each import miss while the compiler probes module resolution, i.e. on every @node-compat compile a dist user runs. Off by default now, same compile-time convention as ejs-gc-internal.h. Gates: full matrix (test-eir, stage0-3, shapes-off, lowtier, dist + test-dist) green; the dist smoke log is spew-free. Co-Authored-By: Claude Fable 5 --- docs/release-p1-results.md | 9 +++++---- runtime/ejs-exception.c | 6 +++++- 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/docs/release-p1-results.md b/docs/release-p1-results.md index fd4ae774..10c86f84 100644 --- a/docs/release-p1-results.md +++ b/docs/release-p1-results.md @@ -89,10 +89,11 @@ the tarball: `echojs-dist-macos-arm64`, `echojs-dist-linux-{arm64,x86_64}`. ## Follow-ons -- The runtime's EXCEPTIONS spew (ejs-exception) is noisy on stderr - during every native-module import resolution — cosmetic, pre-existing, - but every dist user compiling an `@node-compat` import sees it. - Worth silencing before release-P2. +- ~~The runtime's EXCEPTIONS spew (ejs-exception) is noisy on stderr + during every native-module import resolution.~~ FIXED same day: + `#define spew 1` had been hardcoded on in ejs-exception.c since + forever; now 0 (the ejs-gc-internal.h convention — flip the define + to trace exception dispatch). Full matrix re-run green. - `bin/ejs` ships unstripped (~debug-sized); strip at dist time once a symbol-preservation story exists. - Linux compiled programs need libuv/libunwind dev packages at link diff --git a/runtime/ejs-exception.c b/runtime/ejs-exception.c index aa58e11b..0eca1d84 100644 --- a/runtime/ejs-exception.c +++ b/runtime/ejs-exception.c @@ -15,7 +15,11 @@ #include -#define spew 1 +// off by default (same convention as ejs-gc-internal.h): the compiler +// resolves module imports by try/catch probing, so with spew on every +// compiled program logs a full throw/unwind/catch trace to stderr for +// each import miss (release-P1 follow-on) +#define spew 0 #if spew #define SPEW(x) x #else From 48a622e2199f890a162bca7f82289bb2582561d4 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 14:22:02 -0700 Subject: [PATCH 138/146] =?UTF-8?q?eir:=20release-P2=20(P9.2)=20=E2=80=94?= =?UTF-8?q?=20platform=20packages=20on=20the=20dist=20tarball?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Every package obeys the one structural fact: the driver resolves include/ and lib/ relative to argv[0] and does not chase symlinks, so each puts an absolute-path exec shim on PATH and keeps the layout whole. - dist tarball grows a sh-sourceable dist-info (version/triple/os/llvm major) and ships packaging/install.sh at its root - prefix installer: --prefix copy + bin/ejs shim + --uninstall, with best-effort LLVM-major and linux libuv/libunwind -dev advice (warnings only; the driver stays the fail-loudly authority); smoke-tested as //:test-dist step 4 on all three CI platforms - homebrew: packaging/homebrew/echojs.rb.in + make-formula.sh fills url/sha256/version/llvm-major from a tarball's dist-info; layout lives under libexec with bin.write_exec_script (a link farm is exactly the symlink shape the driver can't follow); depends_on llvm@N rides homebrew-core's versioned alias for the current major - npm wrapper (packaging/npm): postinstall fetches the platform tarball from the v release (EJS_NPM_TARBALL override = the CI/offline/pre-release path), bin/ejs.js spawns dist/bin/ejs - CI: macos smokes the formula via a throwaway tap (install, shim compile, brew test, uninstall) + the npm wrapper; linux smokes npm - removed the 2016 make/llvm-3.4-era debian/, release/trusty64, and npm template bitrot Verified locally (macos arm64): brew tap/install/compile/test/uninstall cycle, npm pack/install/compile, //:dist + //:test-dist green. Hosted asset URLs, the real tap, and npm publish land with release-P3. Co-Authored-By: Claude Fable 5 --- .github/workflows/ci.yml | 40 +++++++ BUCK | 4 +- buck-dist.sh | 20 +++- buck-test-dist.sh | 18 ++++ debian/changelog | 5 - debian/compat | 1 - debian/control | 16 --- debian/copyright | 53 --------- debian/docs | 2 - debian/patches/debian-doesnt-like-usrlocal | 12 --- debian/patches/debian-hostconfig.mk | 9 -- debian/patches/series | 2 - debian/rules | 8 -- debian/source/format | 1 - debian/source/include-binaries | 20 ---- docs/plans.md | 8 +- docs/release-p2-results.md | 89 +++++++++++++++ docs/release-plan.md | 9 +- packaging/.gitignore | 1 - packaging/homebrew/echojs.rb.in | 39 +++++++ packaging/homebrew/make-formula.sh | 57 ++++++++++ packaging/install.sh | 119 +++++++++++++++++++++ packaging/npm/.gitignore | 2 + packaging/npm/README.md | 16 +++ packaging/npm/install.js | 89 +++++++++++++++ packaging/npm/package.json | 34 ++++++ packaging/npm/package.json.in | 22 ---- release/.gitignore | 2 - release/release-readme.md.in | 18 ---- release/trusty64/.gitignore | 1 - release/trusty64/Vagrantfile | 22 ---- release/trusty64/provision.sh | 6 -- 32 files changed, 538 insertions(+), 207 deletions(-) delete mode 100644 debian/changelog delete mode 100644 debian/compat delete mode 100644 debian/control delete mode 100644 debian/copyright delete mode 100644 debian/docs delete mode 100644 debian/patches/debian-doesnt-like-usrlocal delete mode 100644 debian/patches/debian-hostconfig.mk delete mode 100644 debian/patches/series delete mode 100755 debian/rules delete mode 100644 debian/source/format delete mode 100644 debian/source/include-binaries create mode 100644 docs/release-p2-results.md delete mode 100644 packaging/.gitignore create mode 100644 packaging/homebrew/echojs.rb.in create mode 100755 packaging/homebrew/make-formula.sh create mode 100755 packaging/install.sh create mode 100644 packaging/npm/.gitignore create mode 100644 packaging/npm/README.md create mode 100644 packaging/npm/install.js create mode 100644 packaging/npm/package.json delete mode 100644 packaging/npm/package.json.in delete mode 100644 release/.gitignore delete mode 100644 release/release-readme.md.in delete mode 100644 release/trusty64/.gitignore delete mode 100644 release/trusty64/Vagrantfile delete mode 100644 release/trusty64/provision.sh diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 441874ce..96e765e1 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -87,6 +87,32 @@ jobs: path: dist-out/*.tar.gz if-no-files-found: error + # release-P2 package smokes. The formula comes from the tarball + # just built (file:// url) via a throwaway local tap; the npm + # wrapper installs through its EJS_NPM_TARBALL override. + # release-P3 points both at hosted release assets instead. + - name: package smoke (homebrew + npm) + run: | + brew tap-new --no-git toshok/echojs-ci + ./packaging/homebrew/make-formula.sh \ + --tarball dist-out/echojs-*.tar.gz \ + --out "$(brew --repository)/Library/Taps/toshok/homebrew-echojs-ci/Formula/echojs.rb" + brew install toshok/echojs-ci/echojs + echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > "$RUNNER_TEMP/smoke.js" + "$(brew --prefix)/bin/ejs" -q -o "$RUNNER_TEMP/smoke.exe" "$RUNNER_TEMP/smoke.js" + test "$("$RUNNER_TEMP/smoke.exe")" = "ok 23" + brew test echojs + brew uninstall echojs + + cd "$RUNNER_TEMP" + npm pack "$GITHUB_WORKSPACE/packaging/npm" + mkdir npm-smoke && cd npm-smoke + npm init -y > /dev/null + EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ + npm install --no-fund --no-audit ../echojs-*.tgz + ./node_modules/.bin/ejs -q -o smoke.exe ../smoke.js + test "$(./smoke.exe)" = "ok 23" + - name: Surface test logs on failure if: failure() run: | @@ -165,3 +191,17 @@ jobs: name: echojs-dist-linux-${{ matrix.arch }} path: dist-out/*.tar.gz if-no-files-found: error + + # release-P2 — the npm wrapper against the tarball just built + # (the prefix installer is smoke-tested inside //:test-dist) + - name: package smoke (npm) + run: | + cd "$RUNNER_TEMP" + npm pack "$GITHUB_WORKSPACE/packaging/npm" + mkdir npm-smoke && cd npm-smoke + npm init -y > /dev/null + EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ + npm install --no-fund --no-audit ../echojs-*.tgz + echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > smoke.js + ./node_modules/.bin/ejs -q -o smoke.exe smoke.js + test "$(./smoke.exe)" = "ok 23" diff --git a/BUCK b/BUCK index 1eafdb28..4685119e 100644 --- a/BUCK +++ b/BUCK @@ -97,6 +97,7 @@ genrule( "buck-dist.sh", "package.json", "LICENSE.txt", + "packaging/install.sh", ], out = "dist", cmd = 'bash $SRCDIR/buck-dist.sh "$(location :srcdir-tree)" ' + @@ -104,7 +105,8 @@ genrule( ' "' + EJS_TRIPLE + '"' + ' "' + EJS_SHORT_TRIPLE + '"' + ' "' + EJS_OS + '"' + - ' "$SRCDIR/package.json" "$SRCDIR/LICENSE.txt"', + ' "$SRCDIR/package.json" "$SRCDIR/LICENSE.txt"' + + ' "$SRCDIR/packaging/install.sh"', ) # smoke-test the dist artifact as a user would use it: unpack, compile diff --git a/buck-dist.sh b/buck-dist.sh index 27089611..0bf018a1 100644 --- a/buck-dist.sh +++ b/buck-dist.sh @@ -27,9 +27,12 @@ SHORT_TRIPLE="$4" # Triple.toShortString(), e.g. arm64-macos OSNAME="$5" # macos | linux PKG_JSON="$6" # //:package.json (version source until release-P3) LICENSE="$7" # LICENSE.txt +INSTALL_SH="$8" # packaging/install.sh (shipped at the tarball root) VERSION="$(sed -n 's/.*"version": *"\([^"]*\)".*/\1/p' "$PKG_JSON" | head -1)" test -n "$VERSION" +LLVM_MAJOR="$(sed -n "s/.*LLVM_MAJOR = '\([0-9]*\)'.*/\1/p" "$TREE/lib/host-config.js")" +test -n "$LLVM_MAJOR" NAME="echojs-$VERSION-$SHORT_TRIPLE" mkdir -p "$OUT" @@ -60,6 +63,19 @@ cp "$TREE/node-compat/libejsnodecompat-module.a" "$ROOT/lib/$SHORT_TRIPLE/libejs cp "$LICENSE" "$ROOT/LICENSE.txt" +# machine-readable metadata (sh-sourceable) for the packaging layers: +# install.sh, the homebrew formula generator, the npm postinstall +cat > "$ROOT/dist-info" < "$ROOT/README.md" <> "$OUT" 2>&1 +test -x "$PREFIX/bin/ejs" +"$PREFIX/bin/ejs" -q -o hello-installed.exe hello.js >> "$OUT" 2>&1 +actual="$(./hello-installed.exe)" +if [ "$actual" != "$expected" ]; then + log "FAIL install.sh: got '$actual', want '$expected'" + exit 1 +fi +"$ROOT/install.sh" --prefix "$PREFIX" --uninstall >> "$OUT" 2>&1 +if [ -e "$PREFIX/bin/ejs" ] || [ -e "$PREFIX/lib/echojs" ]; then + log "FAIL install.sh: uninstall left files behind" + exit 1 +fi +log "PASS install.sh" + log "test-dist OK" diff --git a/debian/changelog b/debian/changelog deleted file mode 100644 index d8ee9892..00000000 --- a/debian/changelog +++ /dev/null @@ -1,5 +0,0 @@ -echojs (0.0.1alpha11-1) trusty; urgency=low - - * Initial release - - -- Chris Toshok Thu, 22 Jan 2015 03:50:17 +0000 diff --git a/debian/compat b/debian/compat deleted file mode 100644 index ec635144..00000000 --- a/debian/compat +++ /dev/null @@ -1 +0,0 @@ -9 diff --git a/debian/control b/debian/control deleted file mode 100644 index 8b2334b1..00000000 --- a/debian/control +++ /dev/null @@ -1,16 +0,0 @@ -Source: echojs -Section: devel -Priority: optional -Maintainer: Chris Toshok -Build-Depends: debhelper (>= 8.0.0), clang-3.4, llvm-3.4-dev, nodejs-legacy, node-gyp, npm, libunwind8-dev, libuv-dev, time -Standards-Version: 3.9.4 -Homepage: https://github.com/toshok/echojs -#Vcs-Git: git://git.debian.org/collab-maint/echojs.git -#Vcs-Browser: http://git.debian.org/?p=collab-maint/echojs.git;a=summary - -Package: echojs -Architecture: amd64 -Depends: ${shlibs:Depends}, ${misc:Depends}, llvm-3.4, clang-3.4, libuv-dev -Description: ES6 to native compiler - Ahead of time Javascript compiler supporting large subset of ES6 spec. Compiles directly - to statically linked executables containing all runtime code. diff --git a/debian/copyright b/debian/copyright deleted file mode 100644 index 387142fe..00000000 --- a/debian/copyright +++ /dev/null @@ -1,53 +0,0 @@ -Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ -Upstream-Name: echojs -Source: https://github.com/toshok/echojs - -Files: * -Copyright: 2012-2015 Chris Toshok - 2014-2015 Carlos Alberto Cortez - -License: - The MIT License (MIT) - - Permission is hereby granted, free of charge, to any person obtaining a copy - of this software and associated documentation files (the "Software"), to deal - in the Software without restriction, including without limitation the rights - to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - copies of the Software, and to permit persons to whom the Software is - furnished to do so, subject to the following conditions: - - The above copyright notice and this permission notice shall be included in - all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - THE SOFTWARE. -# If you want to use GPL v2 or later for the /debian/* files use -# the following clauses, or change it to suit. Delete these two lines -Files: debian/* -Copyright: 2015 unknown -License: GPL-2+ - This package is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - . - This package is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - . - You should have received a copy of the GNU General Public License - along with this program. If not, see - . - On Debian systems, the complete text of the GNU General - Public License version 2 can be found in "/usr/share/common-licenses/GPL-2". - -# Please also look if there are files or directories which have a -# different copyright/license attached and list them here. -# Please avoid to pick license terms that are more restrictive than the -# packaged work, as it may make Debian's contributions unacceptable upstream. diff --git a/debian/docs b/debian/docs deleted file mode 100644 index d99978a9..00000000 --- a/debian/docs +++ /dev/null @@ -1,2 +0,0 @@ -LICENSE.txt -README.md diff --git a/debian/patches/debian-doesnt-like-usrlocal b/debian/patches/debian-doesnt-like-usrlocal deleted file mode 100644 index 14b17949..00000000 --- a/debian/patches/debian-doesnt-like-usrlocal +++ /dev/null @@ -1,12 +0,0 @@ -Description: debian doesn't like things in /usr/local ---- echo-js-0.0.0alpha2.orig/build/config.mk -+++ echo-js-0.0.0alpha2/build/config.mk -@@ -78,7 +78,7 @@ IOSDEV_CFLAGS=$(IOSDEV_ARCH) $(IOSDEV_AR - IOSDEVS_CFLAGS=$(IOSDEVS_ARCH) $(IOSDEVS_ARCH_FLAGS) $(CFLAGS) -DIOS=1 -isysroot $(IOSDEVS_SYSROOT) -miphoneos-version-min=$(MIN_IOS_VERSION) - - # directories used during make install --prefix?=/usr/local -+prefix?=/usr - - bindir:=$(DESTDIR)$(prefix)/bin - includedir:=$(DESTDIR)$(prefix)/include diff --git a/debian/patches/debian-hostconfig.mk b/debian/patches/debian-hostconfig.mk deleted file mode 100644 index 166c2c8b..00000000 --- a/debian/patches/debian-hostconfig.mk +++ /dev/null @@ -1,9 +0,0 @@ -Description: host-config.mk for debian build ---- /dev/null -+++ echo-js-0.0.0alpha2/build/host-config.mk -@@ -0,0 +1,5 @@ -+HOST_TRIPLE:=x86_64-unknown-linux-gnu -+HOST_CPU:=x86_64 -+HOST_VENDOR:=unknown -+HOST_OS:=linux -+ diff --git a/debian/patches/series b/debian/patches/series deleted file mode 100644 index d298a0e7..00000000 --- a/debian/patches/series +++ /dev/null @@ -1,2 +0,0 @@ -debian-doesnt-like-usrlocal -debian-hostconfig.mk diff --git a/debian/rules b/debian/rules deleted file mode 100755 index 79fd842d..00000000 --- a/debian/rules +++ /dev/null @@ -1,8 +0,0 @@ -#!/usr/bin/make -f -# -*- makefile -*- - -# Uncomment this to turn on verbose mode. -#export DH_VERBOSE=1 - -%: - dh $@ diff --git a/debian/source/format b/debian/source/format deleted file mode 100644 index 163aaf8d..00000000 --- a/debian/source/format +++ /dev/null @@ -1 +0,0 @@ -3.0 (quilt) diff --git a/debian/source/include-binaries b/debian/source/include-binaries deleted file mode 100644 index b1391e5e..00000000 --- a/debian/source/include-binaries +++ /dev/null @@ -1,20 +0,0 @@ -test/osx-test/HelloOSX.app/Contents/Resources/en.lproj/MainMenu.nib -test/osx-test/HelloOSX.app/Contents/Resources/moonlight.icns -escodegen/escodegen.browser.js -esprima/assets/images/autocomplete.png -pcre/testdata/grepbinary -pcre/testdata/saved16 -pcre/testdata/saved16BE-1 -pcre/testdata/saved16BE-2 -pcre/testdata/saved16LE-1 -pcre/testdata/saved16LE-2 -pcre/testdata/saved32 -pcre/testdata/saved32BE-1 -pcre/testdata/saved32BE-2 -pcre/testdata/saved32LE-1 -pcre/testdata/saved32LE-2 -pcre/testdata/saved8 -samples/trackmix/TrackMix.app/Contents/Resources/moonlight.icns -samples/trackmixcode/TrackMixCode.app/Contents/Resources/en.lproj/MainMenu.nib -samples/trackmixcode/TrackMixCode.app/Contents/Resources/moonlight.icns - diff --git a/docs/plans.md b/docs/plans.md index 9d426c4e..afb3a844 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -159,8 +159,12 @@ From repo to product. Detail: release-plan.md, compiler-plan.md. test, CI uploads per-platform artifacts; the driver discovers a matching-major opt/llc and fails loudly otherwise, LLVM_MAJOR baked into host-config). -- [ ] **P9.2** platform packages: homebrew, linux, npm wrapper - (release-P2). +- [x] **P9.2** platform packages: homebrew, linux, npm wrapper + (release-P2). DONE 2026-07-30 — docs/release-p2-results.md + (packaging/: prefix installer shipped in the tarball + + `//:test-dist` step, homebrew formula generator + libexec/exec- + shim layout, npm wrapper with EJS_NPM_TARBALL override; CI + smokes all three; hosted URLs await release-P3). - [ ] **P9.3** versioning + release automation off the bootstrap matrix (release-P3). - [ ] **P9.4** getting-started surface (release-P4). diff --git a/docs/release-p2-results.md b/docs/release-p2-results.md new file mode 100644 index 00000000..cd71e302 --- /dev/null +++ b/docs/release-p2-results.md @@ -0,0 +1,89 @@ +# release-P2 results: platform packages + +Status: DONE 2026-07-30 (P9.2 in plans.md). Everything layers on the +release-P1 dist tarball; nothing here touches the compiler or runtime. + +## The one structural fact all three packages obey + +The driver resolves `include/` and `lib/` relative to its own binary +via `argv[0]` and **does not chase symlinks** (ejs_exe_dirname in +ejs-es6.ts). So no package may put a symlink on PATH pointing into the +layout; each uses an absolute-path exec shim instead, and the layout +stays whole in one directory. + +## Tarball additions (buck-dist.sh) + +- `dist-info` at the tarball root: sh-sourceable metadata + (`EJS_VERSION`, `EJS_TRIPLE`, `EJS_SHORT_TRIPLE`, `EJS_OS`, + `EJS_LLVM_MAJOR`). Every packaging layer reads it from the artifact + instead of re-deriving facts about the build. +- `install.sh` (from `packaging/install.sh`) ships at the root. + +## The packages + +- **Prefix installer** (`packaging/install.sh`, in every tarball): + `./install.sh [--prefix /usr/local]` copies the tree to + `$PREFIX/lib/echojs/` and writes the `$PREFIX/bin/ejs` exec + shim; `--uninstall` reverses it (and only removes a shim that points + into its own tree). Best-effort post-install advice: probes the + driver's conventional LLVM locations for a matching major, and on + linux checks `ldconfig -p` for the libuv/libunwind **dev** symlinks + (`libuv.so ` with the trailing space — `.so.1` alone is just the + runtime lib). Warnings only; the driver stays the authority and + fails loudly. +- **Homebrew** (`packaging/homebrew/`): `echojs.rb.in` + + `make-formula.sh --tarball … [--url …] [--out …]` which fills url, + sha256, version, and llvm major from the tarball's dist-info + (refuses non-macos tarballs). The formula installs the whole layout + under `libexec` and `bin.write_exec_script`s the shim — a brew link + farm is exactly the symlink shape the driver can't follow. (Learned + the hard way: `(bin/"ejs").write_exec_script …` creates a *directory* + `bin/ejs/`; the receiver is the dir, the argument the target.) + `depends_on "llvm@N"`: homebrew-core keeps a versioned alias for the + current major (llvm@22 → llvm 22.1.8 today) and a real versioned + formula after it's superseded, so the pin survives brew's llvm + moving on. Homebrew rejects loose formula files now — install goes + through a tap (`brew tap-new`; release-P3 should push generated + formulas to a real `toshok/homebrew-echojs`). +- **npm wrapper** (`packaging/npm/`, name `echojs`): postinstall + downloads `echojs--.tar.gz` from the + `v` GitHub release (darwin-arm64, linux-arm64, linux-x64 → + short triples) and unpacks it as `dist/`; `bin/ejs.js` spawnSync's + `dist/bin/ejs` (node realpaths the main module, so the `.bin` + symlink is harmless — `__dirname` is the package's true location). + `EJS_NPM_TARBALL=/path/to/tarball` overrides the download: the CI + path, the offline escape, and the only way to test before release-P3 + hosts assets. Wrapper version == dist version == release tag; the + publish flow is release-P3's. + +## Verification + +- `//:test-dist` grew step 4: install into a scratch prefix, compile + through the shim, uninstall, assert nothing is left. Runs on all + three CI platforms. +- CI macos job: builds the formula from the just-built tarball via a + throwaway `--no-git` tap, `brew install` + shim compile + `brew + test` + uninstall; then the npm wrapper via `npm pack` + install + with `EJS_NPM_TARBALL` + shim compile. Linux jobs: the npm smoke. +- Locally verified on macos arm64: full brew tap/install/compile/ + `brew test`/uninstall cycle green; npm pack/install/compile green; + `//:dist` + `//:test-dist` green. + +## Removed + +2016-era bitrot from the make/llvm-3.4 build: `debian/`, +`release/` (trusty64 vagrant), `packaging/npm/package.json.in`, +`packaging/.gitignore`. + +## Follow-ons + +- release-P3 owns: hosted release assets (which make the formula's + `--url` mode and the npm download path real), a + `toshok/homebrew-echojs` tap, npm publish, version stamping (root + package.json is still 0.0.0), and deb/rpm if tarball+install.sh + proves insufficient. +- The npm package name `echojs` may be taken on the registry — + check at first publish (scoped fallback: `@toshok/echojs`). +- macos ld's version-min warnings (release-P1 follow-on) now also + surface through every package's compile smoke; still harmless, + still noisy. diff --git a/docs/release-plan.md b/docs/release-plan.md index 3334bab2..0cf75ae0 100644 --- a/docs/release-plan.md +++ b/docs/release-plan.md @@ -18,12 +18,17 @@ answer for people who just want to download a package and go. miscompile taught us "fail loudly"). Deliverable: a `buck2 build //:dist` (or script) that produces a self-contained, relocatable tarball per platform, exercised in CI. -- [ ] **release-P2 — Platform packages.** Homebrew formula/cask for +- [x] **release-P2 — Platform packages.** DONE 2026-07-30 — + docs/release-p2-results.md. Homebrew formula/cask for macOS (arm64 first), a deb/rpm or tarball+install.sh for Linux (arm64 + x86_64 — the CI bootstrap matrix already proves the targets). An npm wrapper package is worth considering for the node-adjacent audience (postinstall fetches the platform - tarball). + tarball). (Shipped: tarball+install.sh — deb/rpm deferred + unless it proves insufficient — plus the formula generator and + the npm wrapper; every package uses an absolute-path exec shim + because the driver doesn't chase symlinks. Hosted asset URLs, + the real tap, and npm publish are release-P3's.) - [ ] **release-P3 — Versioning + release automation.** Semver scheme, a changelog discipline, tagged releases built by CI from the bootstrap matrix (a release is a green matrix + packaged diff --git a/packaging/.gitignore b/packaging/.gitignore deleted file mode 100644 index da2a2843..00000000 --- a/packaging/.gitignore +++ /dev/null @@ -1 +0,0 @@ -npm-tmp diff --git a/packaging/homebrew/echojs.rb.in b/packaging/homebrew/echojs.rb.in new file mode 100644 index 00000000..064b1936 --- /dev/null +++ b/packaging/homebrew/echojs.rb.in @@ -0,0 +1,39 @@ +# Homebrew formula template for echojs (release-P2). Generated by +# make-formula.sh from a //:dist tarball, which fills the url, sha256, +# version, and llvm major from the tarball and its dist-info. +# +# The keg keeps the whole relocatable layout together under libexec +# (the driver resolves include/ and lib/ relative to its own binary and +# does not chase symlinks, so a brew link farm is the wrong shape); bin +# gets an absolute-path exec shim instead. +class Echojs < Formula + desc "Ahead-of-time compiler for JavaScript" + homepage "https://github.com/toshok/echojs" + url "@URL@" + sha256 "@SHA256@" + version "@VERSION@" + license "MIT" + + depends_on arch: :arm64 + # keg-only llvm; the driver discovers #{HOMEBREW_PREFIX}/opt/llvm@N/bin + # on its own and refuses to run against a different major + depends_on "llvm@@LLVM_MAJOR@" + + def install + rm_f "install.sh" # the tarball's prefix installer; brew owns install here + libexec.install Dir["*"] + bin.write_exec_script libexec/"bin/ejs" + end + + test do + (testpath/"hello.js").write <<~EOS + class Greeter { + constructor(who) { this.who = who; } + greet() { return `hello, ${this.who}`; } + } + console.log(new Greeter("brew").greet()); + EOS + system bin/"ejs", "-q", "-o", "hello.exe", "hello.js" + assert_equal "hello, brew", shell_output("./hello.exe").strip + end +end diff --git a/packaging/homebrew/make-formula.sh b/packaging/homebrew/make-formula.sh new file mode 100755 index 00000000..2c0b0145 --- /dev/null +++ b/packaging/homebrew/make-formula.sh @@ -0,0 +1,57 @@ +#!/bin/sh +# Generate the echojs Homebrew formula from a //:dist tarball +# (release-P2). Until release-P3 hosts tagged release artifacts the +# default URL is the local tarball itself (file://…), which is enough +# for `brew install --formula echojs.rb` and CI smoke tests; pass the +# hosted URL once one exists: +# +# make-formula.sh --tarball dist-out/echojs-*.tar.gz \ +# [--url https://github.com/toshok/echojs/releases/download/vX/…] \ +# [--out echojs.rb] +set -eu + +TARBALL= URL= OUT=echojs.rb + +usage() { + echo "usage: $0 --tarball PATH [--url URL] [--out PATH]" >&2 + exit 1 +} + +while [ $# -gt 0 ]; do + case "$1" in + --tarball) [ $# -ge 2 ] || usage; TARBALL="$2"; shift 2 ;; + --url) [ $# -ge 2 ] || usage; URL="$2"; shift 2 ;; + --out) [ $# -ge 2 ] || usage; OUT="$2"; shift 2 ;; + *) usage ;; + esac +done +[ -n "$TARBALL" ] && [ -f "$TARBALL" ] || usage + +HERE="$(cd "$(dirname "$0")" && pwd)" +ABS_TARBALL="$(cd "$(dirname "$TARBALL")" && pwd)/$(basename "$TARBALL")" +[ -n "$URL" ] || URL="file://$ABS_TARBALL" + +# dist-info lives at /dist-info inside the tarball; the exact +# member path avoids needing GNU tar's --wildcards +NAME="$(basename "$TARBALL" .tar.gz)" +INFO="$(tar -xzOf "$ABS_TARBALL" "$NAME/dist-info")" +eval "$INFO" # EJS_VERSION, EJS_TRIPLE, EJS_SHORT_TRIPLE, EJS_OS, EJS_LLVM_MAJOR + +if [ "$EJS_OS" != macos ]; then + echo "error: the homebrew formula wants a macos dist tarball (got EJS_OS=$EJS_OS)" >&2 + exit 1 +fi + +if command -v shasum >/dev/null 2>&1; then + SHA256="$(shasum -a 256 "$ABS_TARBALL" | cut -d' ' -f1)" +else + SHA256="$(sha256sum "$ABS_TARBALL" | cut -d' ' -f1)" +fi + +sed -e "s|@URL@|$URL|" \ + -e "s|@SHA256@|$SHA256|" \ + -e "s|@VERSION@|$EJS_VERSION|" \ + -e "s|@LLVM_MAJOR@|$EJS_LLVM_MAJOR|" \ + "$HERE/echojs.rb.in" > "$OUT" + +echo "wrote $OUT (version $EJS_VERSION, llvm@$EJS_LLVM_MAJOR, $URL)" diff --git a/packaging/install.sh b/packaging/install.sh new file mode 100755 index 00000000..61d9cf55 --- /dev/null +++ b/packaging/install.sh @@ -0,0 +1,119 @@ +#!/bin/sh +# echojs prefix installer (release-P2). Ships at the root of the dist +# tarball; run it from the unpacked directory: +# +# tar xzf echojs--.tar.gz +# cd echojs-- +# sudo ./install.sh # into /usr/local +# ./install.sh --prefix ~/.local # anywhere writable +# +# The tree is copied whole to $PREFIX/lib/echojs/ (the driver +# resolves include/ and lib/ relative to its own binary, so bin/, +# include/ and lib/ must stay together) and $PREFIX/bin/ejs becomes a +# tiny exec shim holding the absolute path — the driver does not chase +# symlinks, so a symlink would break that resolution. +# +# ./install.sh --uninstall [--prefix P] removes both again +set -eu + +PREFIX=/usr/local +UNINSTALL=no + +usage() { + echo "usage: $0 [--prefix PREFIX] [--uninstall]" >&2 + exit 1 +} + +while [ $# -gt 0 ]; do + case "$1" in + --prefix) [ $# -ge 2 ] || usage; PREFIX="$2"; shift 2 ;; + --prefix=*) PREFIX="${1#--prefix=}"; shift ;; + --uninstall) UNINSTALL=yes; shift ;; + -h|--help) usage ;; + *) usage ;; + esac +done + +HERE="$(cd "$(dirname "$0")" && pwd)" +[ -f "$HERE/dist-info" ] || { + echo "error: $HERE/dist-info not found — run this from an unpacked echojs dist directory" >&2 + exit 1 +} +# EJS_VERSION, EJS_TRIPLE, EJS_SHORT_TRIPLE, EJS_OS, EJS_LLVM_MAJOR +. "$HERE/dist-info" + +NAME="echojs-$EJS_VERSION-$EJS_SHORT_TRIPLE" +DEST="$PREFIX/lib/echojs/$NAME" +SHIM="$PREFIX/bin/ejs" + +if [ "$UNINSTALL" = yes ]; then + rm -rf "$DEST" + rmdir "$PREFIX/lib/echojs" 2>/dev/null || true + # only remove the shim if it is ours (points into $DEST) + if [ -f "$SHIM" ] && grep -q "lib/echojs/$NAME/bin/ejs" "$SHIM" 2>/dev/null; then + rm -f "$SHIM" + fi + echo "uninstalled $NAME from $PREFIX" + exit 0 +fi + +mkdir -p "$PREFIX/bin" "$PREFIX/lib/echojs" +rm -rf "$DEST" +cp -R "$HERE" "$DEST" +rm -f "$DEST/install.sh" + +cat > "$SHIM" </dev/null | grep -q "LLVM version $EJS_LLVM_MAJOR\."; then + echo "$d" + return 0 + fi + done + if opt --version 2>/dev/null | grep -q "LLVM version $EJS_LLVM_MAJOR\."; then + echo "(PATH)" + return 0 + fi + return 1 +} + +if BINDIR="$(find_opt)"; then + echo " llvm $EJS_LLVM_MAJOR: $BINDIR" +else + echo "warning: no LLVM $EJS_LLVM_MAJOR opt/llc found in the conventional locations." >&2 + if [ "$EJS_OS" = macos ]; then + echo " install it with: brew install llvm" >&2 + else + echo " install it from https://apt.llvm.org (or your distribution's llvm-$EJS_LLVM_MAJOR packages)" >&2 + fi + echo " or point LLVM_BINDIR at a bindir containing a matching opt/llc." >&2 +fi + +if [ "$EJS_OS" = linux ] && command -v ldconfig >/dev/null 2>&1; then + # the trailing space matters: "libuv.so " is the -dev symlink the + # final link needs; "libuv.so.1" is just the runtime library + for spec in libuv:libuv1-dev libunwind:libunwind-dev; do + lib="${spec%%:*}"; pkg="${spec#*:}" + if ! ldconfig -p 2>/dev/null | grep -q "$lib\.so "; then + echo "warning: $lib development package not found (compiled programs link against it)" >&2 + echo " e.g. apt install $pkg" >&2 + fi + done +fi diff --git a/packaging/npm/.gitignore b/packaging/npm/.gitignore new file mode 100644 index 00000000..3be4a7b0 --- /dev/null +++ b/packaging/npm/.gitignore @@ -0,0 +1,2 @@ +dist/ +*.tgz diff --git a/packaging/npm/README.md b/packaging/npm/README.md new file mode 100644 index 00000000..52000bd5 --- /dev/null +++ b/packaging/npm/README.md @@ -0,0 +1,16 @@ +# echojs (npm wrapper) + +An ahead-of-time compiler for JavaScript. This package downloads the +platform's prebuilt echojs toolchain at install time (macOS arm64, +Linux arm64/x86_64) and exposes its `ejs` driver on your PATH. + + npm install -g echojs + ejs -o hello hello.js && ./hello + +Compiling needs an LLVM toolchain with the major version the release +was built against (`ejs` discovers it and fails loudly otherwise — +macOS: `brew install llvm`; Linux: https://apt.llvm.org, plus libuv and +libunwind development packages for linking). + +`EJS_NPM_TARBALL=/path/to/echojs--.tar.gz` makes the +install use a local dist tarball instead of downloading. diff --git a/packaging/npm/install.js b/packaging/npm/install.js new file mode 100644 index 00000000..fd148041 --- /dev/null +++ b/packaging/npm/install.js @@ -0,0 +1,89 @@ +// npm postinstall (release-P2): fetch the platform dist tarball and +// unpack it as ./dist, which bin/ejs.js execs out of. The wrapper's +// version pins the release tag: v must have uploaded +// echojs--.tar.gz assets (release-P3 automation +// owns making that true). +// +// EJS_NPM_TARBALL=/path/to/echojs-*.tar.gz overrides the download — +// the pre-release/CI path, and the escape hatch for offline installs. +"use strict"; + +const fs = require("fs"); +const os = require("os"); +const path = require("path"); +const { spawnSync } = require("child_process"); + +const version = require("./package.json").version; + +const SHORT_TRIPLES = { + "darwin-arm64": "arm64-macos", + "linux-arm64": "arm64-linux", + "linux-x64": "x86_64-linux", +}; + +function fail(msg) { + console.error(`echojs install: ${msg}`); + process.exit(1); +} + +async function main() { + const key = `${process.platform}-${process.arch}`; + const shortTriple = SHORT_TRIPLES[key]; + if (!shortTriple) { + fail( + `no prebuilt echojs for ${key} (supported: ${Object.keys(SHORT_TRIPLES).join(", ")})` + ); + } + + const work = fs.mkdtempSync(path.join(os.tmpdir(), "echojs-npm-")); + let tarball = process.env["EJS_NPM_TARBALL"]; + if (tarball) { + if (!fs.existsSync(tarball)) fail(`EJS_NPM_TARBALL=${tarball} does not exist`); + console.log(`echojs install: using ${tarball}`); + } else { + const url = `https://github.com/toshok/echojs/releases/download/v${version}/echojs-${version}-${shortTriple}.tar.gz`; + console.log(`echojs install: fetching ${url}`); + const res = await fetch(url); + if (!res.ok) { + fail( + `download failed (${res.status} ${res.statusText}); ` + + `if you are offline or the release is missing, point EJS_NPM_TARBALL at a local tarball` + ); + } + tarball = path.join(work, "dist.tar.gz"); + fs.writeFileSync(tarball, Buffer.from(await res.arrayBuffer())); + } + + const unpack = path.join(work, "unpack"); + fs.mkdirSync(unpack); + const tar = spawnSync("tar", ["-xzf", tarball, "-C", unpack], { stdio: "inherit" }); + if (tar.status !== 0) fail(`tar extraction failed (${tar.status ?? tar.error})`); + + const entries = fs.readdirSync(unpack).filter((e) => e.startsWith("echojs-")); + if (entries.length !== 1) fail(`expected one echojs-* directory in the tarball, got [${entries}]`); + + const dist = path.join(__dirname, "dist"); + fs.rmSync(dist, { recursive: true, force: true }); + fs.renameSync(path.join(unpack, entries[0]), dist); + fs.rmSync(work, { recursive: true, force: true }); + + const exe = path.join(dist, "bin", "ejs"); + if (!fs.existsSync(exe)) fail(`unpacked tarball has no bin/ejs`); + fs.chmodSync(exe, 0o755); + + // dist-info records what the driver needs on top of this package + // (a matching LLVM major); surface it once at install time + const info = path.join(dist, "dist-info"); + const major = fs.existsSync(info) + ? (fs.readFileSync(info, "utf8").match(/^EJS_LLVM_MAJOR=(\d+)$/m) || [])[1] + : undefined; + console.log(`echojs install: ${entries[0]} ready`); + if (major) { + console.log( + `echojs install: compiling needs LLVM ${major} (opt/llc) — ` + + `brew install llvm / https://apt.llvm.org; ejs verifies and fails loudly otherwise` + ); + } +} + +main().catch((e) => fail(e.stack || String(e))); diff --git a/packaging/npm/package.json b/packaging/npm/package.json new file mode 100644 index 00000000..58222a53 --- /dev/null +++ b/packaging/npm/package.json @@ -0,0 +1,34 @@ +{ + "name": "echojs", + "version": "0.0.0", + "description": "Ahead-of-time compiler for JavaScript — native toolchain wrapper", + "bin": { + "ejs": "bin/ejs.js" + }, + "scripts": { + "postinstall": "node install.js" + }, + "files": [ + "bin", + "install.js", + "README.md" + ], + "os": [ + "darwin", + "linux" + ], + "cpu": [ + "arm64", + "x64" + ], + "engines": { + "node": ">=18" + }, + "repository": { + "type": "git", + "url": "git+https://github.com/toshok/echojs.git" + }, + "author": "Chris Toshok ", + "license": "MIT", + "homepage": "https://github.com/toshok/echojs#readme" +} diff --git a/packaging/npm/package.json.in b/packaging/npm/package.json.in deleted file mode 100644 index a9e6aca5..00000000 --- a/packaging/npm/package.json.in +++ /dev/null @@ -1,22 +0,0 @@ -{ - "name": "pirouette-toolchain-darwin-x64", - "version": "@PRODUCT_VERSION@", - "description": "Compile ES2015 to native code on OSX/iOS/linux", - "main": "index.js", - "files": [ - "bin", - "include", - "lib" - ], - "repository": { - "type": "git", - "url": "@PRODUCT_GITHUB_URL@" - }, - "author": "Chris Toshok <@PRODUCT_EMAIL@> (https://blog.toshokelectric.com/)", - "license": "MIT", - "bugs": { - "url": "@PRODUCT_GITHUB_URL@/issues" - }, - "homepage": "@PRODUCT_GITHUB_URL@", - "readme": "@PRODUCT_GITHUB_URL@#readme" -} diff --git a/release/.gitignore b/release/.gitignore deleted file mode 100644 index b2532e40..00000000 --- a/release/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -release-readme.md -echojs-* diff --git a/release/release-readme.md.in b/release/release-readme.md.in deleted file mode 100644 index 45de1db7..00000000 --- a/release/release-readme.md.in +++ /dev/null @@ -1,18 +0,0 @@ -EchoJS @PRODUCT_VERSION@ ------------------------- - -OSX only test tarball - -you need llvm34 installed. - -```sh -$ brew install llvm34 -$ export LLVM_SUFFIX-3.4 -``` - -as an example of XmlHTTPRequest + ES6 Promises: - -```sh -$ bin/ejs samples/fetch.js -$ samples/fetch.js.exe http://www.google.com/ -``` diff --git a/release/trusty64/.gitignore b/release/trusty64/.gitignore deleted file mode 100644 index 8000dd9d..00000000 --- a/release/trusty64/.gitignore +++ /dev/null @@ -1 +0,0 @@ -.vagrant diff --git a/release/trusty64/Vagrantfile b/release/trusty64/Vagrantfile deleted file mode 100644 index 3212c933..00000000 --- a/release/trusty64/Vagrantfile +++ /dev/null @@ -1,22 +0,0 @@ -# -*- mode: ruby -*- -# vi: set ft=ruby : - -# Vagrantfile API/syntax version. Don't touch unless you know what you're doing! -VAGRANTFILE_API_VERSION = "2" - -Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| - # All Vagrant configuration is done here. The most common configuration - # options are documented and commented below. For a complete reference, - # please see the online documentation at vagrantup.com. - - # Every Vagrant virtual environment requires a box to build off of. - config.vm.box = "ubuntu/trusty64" - config.vm.provision :shell, path: "provision.sh" - - config.vm.provider "virtualbox" do |v| - v.memory = 8192 - v.cpus = 2 - end - - config.vm.synced_folder "../../", "/src/echo-js" -end diff --git a/release/trusty64/provision.sh b/release/trusty64/provision.sh deleted file mode 100644 index 9da11e15..00000000 --- a/release/trusty64/provision.sh +++ /dev/null @@ -1,6 +0,0 @@ -#!/bin/sh - -apt-get update -apt-get install -y llvm-3.4 clang-3.4 make git nodejs-legacy node-gyp npm libunwind8-dev libuv-dev build-essential dh-make bzr-builddeb -npm install -g coffee-script -npm install -g mocha From 1de4f5a00f12ad116be08abacf04ee87d9b50f9e Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 15:03:44 -0700 Subject: [PATCH 139/146] =?UTF-8?q?eir:=20release-P3=20(P9.3)=20=E2=80=94?= =?UTF-8?q?=20versioning=20+=20release=20automation=20off=20the=20matrix?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The version lives in exactly two files (package.json, the npm wrapper's) plus the git tag; everything else reads it from there. - CHANGELOG.md: Keep-a-Changelog shape, pre-1.0 semver reading documented, seeded with the first-release Unreleased section - packaging/prepare-release.sh: clean-tree check, rolls Unreleased into a dated section (refuses an empty one), stamps both package.jsons via npm version, commits + annotated v-tag; pushing the tag stays a human act - ci.yml's matrix jobs → reusable .github/workflows/bootstrap.yml (workflow_call); CI and Release call the identical workflow, so 'a release is a green matrix' is literal - release.yml on v tags: version-check (tag == both package.jsons, CHANGELOG section exists) → bootstrap → publish (DRAFT GitHub release with the three tarballs + hosted-URL homebrew formula + npm tgz, changelog section as notes; tap push / npm publish shell-gated on HOMEBREW_TAP_TOKEN / NPM_TOKEN) → clean-machine smokes (bare ubuntu:24.04 container both arches + fresh macos runner: tarball + documented prereqs only, install.sh, compile + run) - npm wrapper renamed @toshok/echojs — the bare name is taken on the registry (unrelated 0.1.4); CI smoke globs follow the scoped pack filename Verified: prepare-release dry run in a scratch clone (stamps, rolls, tags; second cut refuses on empty Unreleased), actionlint clean on all three workflows, make-formula --url mode produces the hosted formula. First pushed tag is the end-to-end proof. Co-Authored-By: Claude Fable 5 --- .github/workflows/bootstrap.yml | 207 ++++++++++++++++++++++++++++++++ .github/workflows/ci.yml | 200 +----------------------------- .github/workflows/release.yml | 192 +++++++++++++++++++++++++++++ CHANGELOG.md | 50 ++++++++ docs/plans.md | 10 +- docs/release-p2-results.md | 6 +- docs/release-p3-results.md | 94 +++++++++++++++ docs/release-plan.md | 10 +- packaging/npm/README.md | 2 +- packaging/npm/package.json | 2 +- packaging/prepare-release.sh | 72 +++++++++++ 11 files changed, 642 insertions(+), 203 deletions(-) create mode 100644 .github/workflows/bootstrap.yml create mode 100644 .github/workflows/release.yml create mode 100644 CHANGELOG.md create mode 100644 docs/release-p3-results.md create mode 100755 packaging/prepare-release.sh diff --git a/.github/workflows/bootstrap.yml b/.github/workflows/bootstrap.yml new file mode 100644 index 00000000..b946568c --- /dev/null +++ b/.github/workflows/bootstrap.yml @@ -0,0 +1,207 @@ +# The full buck2 bootstrap matrix, as a reusable workflow: ci.yml runs +# it on every push/PR, release.yml runs the SAME jobs on a version tag +# (release-P3's "a release is a green matrix" is literal — one +# definition, two callers). +# +# Per platform (macOS arm64, Linux arm64/x86_64), sequential targets — +# buck2 shares artifacts between them, so the stage ladder (stage1 +# builds feed stage2/3) costs one traversal: +# +# test-eir EIR unit tests (node-hosted) +# test-stage0 full suite against the node-hosted compiler +# test-stage1 suite against the self-compiled compiler +# test-stage2 suite against stage1's self-compile +# test-stage3 suite + the stage2/stage3 byte-identity fixed point +# +# then the dist tarball + its smoke tests (release-P1) and the package +# smokes (release-P2), uploading echojs-dist- artifacts. +name: bootstrap + +on: + workflow_call: + +jobs: + bootstrap-macos-arm64: + name: bootstrap-macos-arm64 + runs-on: macos-15 # arm64 + timeout-minutes: 120 + steps: + - uses: actions/checkout@v4 + with: + submodules: recursive + + - name: Install llvm + run: | + brew install llvm zstd + "$(brew --prefix llvm)/bin/llvm-config" --version + + # buck2 isn't in homebrew core (locally it comes from the + # facebook/fb tap); use the release binary like the linux jobs + - name: Install buck2 + run: | + curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-aarch64-apple-darwin.zst" -o /tmp/buck2.zst + sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' + buck2 --version + + # unpinned (runtime-P3): the value-based harness serializes logged + # values itself (test/harness-console-shim.js) on both the node and + # ejs sides, so baselines no longer depend on node's inspect format + # (verified: 22.4.0 and 22.23.2 generate byte-identical baselines) + - uses: actions/setup-node@v4 + with: + node-version: 22.x + + - name: npm ci + run: npm ci + + # the node-hosted (stage0) compiler drives llvm through this + # node-gyp native addon; buck picks up the built artifact + - name: Build the node-llvm addon + run: ./node-llvm/build-addon.sh "$(brew --prefix llvm)" + + - name: TypeScript typecheck + run: | + node node_modules/typescript/bin/tsc -p tsconfig.json + node node_modules/typescript/bin/tsc -p test --noEmit + + - name: buck2 bootstrap matrix + run: | + buck2 build \ + //:test-eir \ + //:test-stage0 \ + //:test-stage1 \ + //:test-stage2 \ + //:test-stage3 + + # the relocatable dist artifact + its installed-layout smoke test + # (release-P1); the stage builds above are shared, so this only + # adds the repack + smoke compile + - name: dist artifact + run: | + buck2 build //:test-dist + buck2 build //:dist --out dist-out/ + + - uses: actions/upload-artifact@v4 + with: + name: echojs-dist-macos-arm64 + path: dist-out/*.tar.gz + if-no-files-found: error + + # release-P2 package smokes. The formula comes from the tarball + # just built (file:// url) via a throwaway local tap; the npm + # wrapper installs through its EJS_NPM_TARBALL override. + # release-P3 points both at hosted release assets instead. + - name: package smoke (homebrew + npm) + run: | + brew tap-new --no-git toshok/echojs-ci + ./packaging/homebrew/make-formula.sh \ + --tarball dist-out/echojs-*.tar.gz \ + --out "$(brew --repository)/Library/Taps/toshok/homebrew-echojs-ci/Formula/echojs.rb" + brew install toshok/echojs-ci/echojs + echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > "$RUNNER_TEMP/smoke.js" + "$(brew --prefix)/bin/ejs" -q -o "$RUNNER_TEMP/smoke.exe" "$RUNNER_TEMP/smoke.js" + test "$("$RUNNER_TEMP/smoke.exe")" = "ok 23" + brew test echojs + brew uninstall echojs + + cd "$RUNNER_TEMP" + npm pack "$GITHUB_WORKSPACE/packaging/npm" + mkdir npm-smoke && cd npm-smoke + npm init -y > /dev/null + EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ + npm install --no-fund --no-audit ../toshok-echojs-*.tgz + ./node_modules/.bin/ejs -q -o smoke.exe ../smoke.js + test "$(./smoke.exe)" = "ok 23" + + - name: Surface test logs on failure + if: failure() + run: | + find buck-out/v2 -name "test-*.log" -newer package.json 2>/dev/null | while read -r f; do + echo "=== $f ===" + tail -60 "$f" + done || true + + bootstrap-linux: + name: bootstrap-linux-${{ matrix.arch }} + runs-on: ${{ matrix.runner }} + timeout-minutes: 150 + strategy: + fail-fast: false + matrix: + include: + - arch: arm64 + runner: ubuntu-24.04-arm + buck2_triple: aarch64-unknown-linux-gnu + - arch: x86_64 + runner: ubuntu-24.04 + buck2_triple: x86_64-unknown-linux-gnu + steps: + - uses: actions/checkout@v4 + with: + submodules: recursive + + - name: Install packages + run: | + sudo apt-get update -qq + sudo apt-get install -y -qq build-essential cmake zstd libunwind-dev libuv1-dev + + - name: Install llvm 22 + run: | + curl -sSf https://apt.llvm.org/llvm.sh -o /tmp/llvm.sh + chmod +x /tmp/llvm.sh + sudo /tmp/llvm.sh 22 + /usr/lib/llvm-22/bin/llvm-config --version + # prelude's cxx toolchain wants a bare clang++ on PATH + echo "/usr/lib/llvm-22/bin" >> "$GITHUB_PATH" + + - name: Install buck2 + run: | + curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-${{ matrix.buck2_triple }}.zst" -o /tmp/buck2.zst + sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' + buck2 --version + + # unpinned (runtime-P3) — see the macOS job's note + - uses: actions/setup-node@v4 + with: + node-version: 22.x + + - name: npm ci + run: npm ci + + - name: Build the node-llvm addon + run: ./node-llvm/build-addon.sh /usr/lib/llvm-22 + + - name: buck2 bootstrap matrix + run: | + buck2 build --config llvm.prefix=/usr/lib/llvm-22 \ + //:test-eir \ + //:test-stage0 \ + //:test-stage1 \ + //:test-stage2 \ + //:test-stage3 + + # release-P1 — see the macOS job's note + - name: dist artifact + run: | + buck2 build --config llvm.prefix=/usr/lib/llvm-22 //:test-dist + buck2 build --config llvm.prefix=/usr/lib/llvm-22 //:dist --out dist-out/ + + - uses: actions/upload-artifact@v4 + with: + name: echojs-dist-linux-${{ matrix.arch }} + path: dist-out/*.tar.gz + if-no-files-found: error + + # release-P2 — the npm wrapper against the tarball just built + # (the prefix installer is smoke-tested inside //:test-dist) + - name: package smoke (npm) + run: | + cd "$RUNNER_TEMP" + npm pack "$GITHUB_WORKSPACE/packaging/npm" + mkdir npm-smoke && cd npm-smoke + npm init -y > /dev/null + EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ + npm install --no-fund --no-audit ../toshok-echojs-*.tgz + echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > smoke.js + ./node_modules/.bin/ejs -q -o smoke.exe smoke.js + test "$(./smoke.exe)" = "ok 23" diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 96e765e1..9300fd17 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -1,14 +1,6 @@ -# EchoJS CI: the full buck2 bootstrap matrix on macOS arm64 (the -# configuration the compiler is developed against). -# -# One job, sequential targets: buck2 shares artifacts between them, so -# the stage ladder (stage1 builds feed stage2/3) costs one traversal. -# -# test-eir EIR unit tests (node-hosted) -# test-stage0 full suite against the node-hosted compiler -# test-stage1 suite against the self-compiled compiler -# test-stage2 suite against stage1's self-compile -# test-stage3 suite + the stage2/stage3 byte-identity fixed point +# EchoJS CI: the full buck2 bootstrap matrix on every push/PR. The +# jobs live in bootstrap.yml (a reusable workflow) so release.yml can +# run the identical matrix on a version tag. name: CI on: @@ -21,187 +13,5 @@ concurrency: cancel-in-progress: true jobs: - bootstrap-macos-arm64: - name: bootstrap-macos-arm64 - runs-on: macos-15 # arm64 - timeout-minutes: 120 - steps: - - uses: actions/checkout@v4 - with: - submodules: recursive - - - name: Install llvm - run: | - brew install llvm zstd - "$(brew --prefix llvm)/bin/llvm-config" --version - - # buck2 isn't in homebrew core (locally it comes from the - # facebook/fb tap); use the release binary like the linux jobs - - name: Install buck2 - run: | - curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-aarch64-apple-darwin.zst" -o /tmp/buck2.zst - sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' - buck2 --version - - # unpinned (runtime-P3): the value-based harness serializes logged - # values itself (test/harness-console-shim.js) on both the node and - # ejs sides, so baselines no longer depend on node's inspect format - # (verified: 22.4.0 and 22.23.2 generate byte-identical baselines) - - uses: actions/setup-node@v4 - with: - node-version: 22.x - - - name: npm ci - run: npm ci - - # the node-hosted (stage0) compiler drives llvm through this - # node-gyp native addon; buck picks up the built artifact - - name: Build the node-llvm addon - run: ./node-llvm/build-addon.sh "$(brew --prefix llvm)" - - - name: TypeScript typecheck - run: | - node node_modules/typescript/bin/tsc -p tsconfig.json - node node_modules/typescript/bin/tsc -p test --noEmit - - - name: buck2 bootstrap matrix - run: | - buck2 build \ - //:test-eir \ - //:test-stage0 \ - //:test-stage1 \ - //:test-stage2 \ - //:test-stage3 - - # the relocatable dist artifact + its installed-layout smoke test - # (release-P1); the stage builds above are shared, so this only - # adds the repack + smoke compile - - name: dist artifact - run: | - buck2 build //:test-dist - buck2 build //:dist --out dist-out/ - - - uses: actions/upload-artifact@v4 - with: - name: echojs-dist-macos-arm64 - path: dist-out/*.tar.gz - if-no-files-found: error - - # release-P2 package smokes. The formula comes from the tarball - # just built (file:// url) via a throwaway local tap; the npm - # wrapper installs through its EJS_NPM_TARBALL override. - # release-P3 points both at hosted release assets instead. - - name: package smoke (homebrew + npm) - run: | - brew tap-new --no-git toshok/echojs-ci - ./packaging/homebrew/make-formula.sh \ - --tarball dist-out/echojs-*.tar.gz \ - --out "$(brew --repository)/Library/Taps/toshok/homebrew-echojs-ci/Formula/echojs.rb" - brew install toshok/echojs-ci/echojs - echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > "$RUNNER_TEMP/smoke.js" - "$(brew --prefix)/bin/ejs" -q -o "$RUNNER_TEMP/smoke.exe" "$RUNNER_TEMP/smoke.js" - test "$("$RUNNER_TEMP/smoke.exe")" = "ok 23" - brew test echojs - brew uninstall echojs - - cd "$RUNNER_TEMP" - npm pack "$GITHUB_WORKSPACE/packaging/npm" - mkdir npm-smoke && cd npm-smoke - npm init -y > /dev/null - EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ - npm install --no-fund --no-audit ../echojs-*.tgz - ./node_modules/.bin/ejs -q -o smoke.exe ../smoke.js - test "$(./smoke.exe)" = "ok 23" - - - name: Surface test logs on failure - if: failure() - run: | - find buck-out/v2 -name "test-*.log" -newer package.json 2>/dev/null | while read -r f; do - echo "=== $f ===" - tail -60 "$f" - done || true - - bootstrap-linux: - name: bootstrap-linux-${{ matrix.arch }} - runs-on: ${{ matrix.runner }} - timeout-minutes: 150 - strategy: - fail-fast: false - matrix: - include: - - arch: arm64 - runner: ubuntu-24.04-arm - buck2_triple: aarch64-unknown-linux-gnu - - arch: x86_64 - runner: ubuntu-24.04 - buck2_triple: x86_64-unknown-linux-gnu - steps: - - uses: actions/checkout@v4 - with: - submodules: recursive - - - name: Install packages - run: | - sudo apt-get update -qq - sudo apt-get install -y -qq build-essential cmake zstd libunwind-dev libuv1-dev - - - name: Install llvm 22 - run: | - curl -sSf https://apt.llvm.org/llvm.sh -o /tmp/llvm.sh - chmod +x /tmp/llvm.sh - sudo /tmp/llvm.sh 22 - /usr/lib/llvm-22/bin/llvm-config --version - # prelude's cxx toolchain wants a bare clang++ on PATH - echo "/usr/lib/llvm-22/bin" >> "$GITHUB_PATH" - - - name: Install buck2 - run: | - curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-${{ matrix.buck2_triple }}.zst" -o /tmp/buck2.zst - sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' - buck2 --version - - # unpinned (runtime-P3) — see the macOS job's note - - uses: actions/setup-node@v4 - with: - node-version: 22.x - - - name: npm ci - run: npm ci - - - name: Build the node-llvm addon - run: ./node-llvm/build-addon.sh /usr/lib/llvm-22 - - - name: buck2 bootstrap matrix - run: | - buck2 build --config llvm.prefix=/usr/lib/llvm-22 \ - //:test-eir \ - //:test-stage0 \ - //:test-stage1 \ - //:test-stage2 \ - //:test-stage3 - - # release-P1 — see the macOS job's note - - name: dist artifact - run: | - buck2 build --config llvm.prefix=/usr/lib/llvm-22 //:test-dist - buck2 build --config llvm.prefix=/usr/lib/llvm-22 //:dist --out dist-out/ - - - uses: actions/upload-artifact@v4 - with: - name: echojs-dist-linux-${{ matrix.arch }} - path: dist-out/*.tar.gz - if-no-files-found: error - - # release-P2 — the npm wrapper against the tarball just built - # (the prefix installer is smoke-tested inside //:test-dist) - - name: package smoke (npm) - run: | - cd "$RUNNER_TEMP" - npm pack "$GITHUB_WORKSPACE/packaging/npm" - mkdir npm-smoke && cd npm-smoke - npm init -y > /dev/null - EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ - npm install --no-fund --no-audit ../echojs-*.tgz - echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > smoke.js - ./node_modules/.bin/ejs -q -o smoke.exe smoke.js - test "$(./smoke.exe)" = "ok 23" + bootstrap: + uses: ./.github/workflows/bootstrap.yml diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml new file mode 100644 index 00000000..19670cc6 --- /dev/null +++ b/.github/workflows/release.yml @@ -0,0 +1,192 @@ +# EchoJS release pipeline (release-P3). Runs when a v tag is +# pushed (prepare-release.sh makes the tag; pushing it is the human +# act that starts this). A release is: +# +# version-check the tag, package.json, the npm wrapper, and the +# CHANGELOG all agree +# bootstrap the SAME full matrix CI runs (bootstrap.yml): +# stage ladder + dist tarballs + package smokes on +# all three platforms +# publish a DRAFT GitHub release holding the three tarballs, +# the generated homebrew formula (hosted urls), and +# the npm wrapper tgz; changelog section = notes. +# Publishing the draft is the go-live act (draft +# asset urls are not public, so the formula and npm +# postinstall only resolve once it's published). +# npm publish / tap push run iff their secrets +# (NPM_TOKEN / HOMEBREW_TAP_TOKEN) are configured. +# smoke-* clean-machine proof: a bare ubuntu container and a +# fresh macos runner install ONLY the tarball + the +# documented prerequisites, then compile and run a +# program through the installed layout. +name: Release + +on: + push: + tags: ["v[0-9]+.[0-9]+.[0-9]+"] + +permissions: + contents: write + +concurrency: + group: release-${{ github.ref }} + +jobs: + version-check: + runs-on: ubuntu-24.04 + steps: + - uses: actions/checkout@v4 + - name: tag agrees with the tree + run: | + TAG="${GITHUB_REF_NAME#v}" + for f in package.json packaging/npm/package.json; do + V="$(node -p "require('./$f').version")" + if [ "$V" != "$TAG" ]; then + echo "::error::$f has version $V but the tag says $TAG (use packaging/prepare-release.sh)" + exit 1 + fi + done + if ! grep -q "^## \[$TAG\] " CHANGELOG.md; then + echo "::error::CHANGELOG.md has no '## [$TAG]' section" + exit 1 + fi + + bootstrap: + needs: version-check + uses: ./.github/workflows/bootstrap.yml + + publish: + needs: bootstrap + runs-on: ubuntu-24.04 + steps: + - uses: actions/checkout@v4 + + - uses: actions/download-artifact@v4 + with: + pattern: echojs-dist-* + merge-multiple: true + path: assets + + - name: assemble release assets + run: | + TAG="${GITHUB_REF_NAME#v}" + ls -l assets + test -f "assets/echojs-$TAG-arm64-macos.tar.gz" + test -f "assets/echojs-$TAG-arm64-linux.tar.gz" + test -f "assets/echojs-$TAG-x86_64-linux.tar.gz" + + # homebrew formula: sha from the built tarball, url = the + # published asset location + ./packaging/homebrew/make-formula.sh \ + --tarball "assets/echojs-$TAG-arm64-macos.tar.gz" \ + --url "https://github.com/${GITHUB_REPOSITORY}/releases/download/v$TAG/echojs-$TAG-arm64-macos.tar.gz" \ + --out assets/echojs.rb + + # the npm wrapper tgz (version already stamped by + # prepare-release.sh; its postinstall downloads the tarball + # asset for the host platform) + npm pack ./packaging/npm --pack-destination assets + + # release notes = this version's changelog section + awk -v v="$TAG" ' + $0 ~ "^## \\[" v "\\] " { f = 1; next } + /^## \[/ { f = 0 } + f + ' CHANGELOG.md > notes.md + cat notes.md + + - name: draft the GitHub release + env: + GH_TOKEN: ${{ github.token }} + run: | + gh release create "$GITHUB_REF_NAME" \ + --draft \ + --verify-tag \ + --title "echojs ${GITHUB_REF_NAME#v}" \ + --notes-file notes.md \ + assets/* + + # both publish legs are shell-gated on their secrets: absent + # secret = loudly-skipped step, not a broken release + - name: push the formula to the tap + env: + TAP_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }} + run: | + if [ -z "$TAP_TOKEN" ]; then + echo "HOMEBREW_TAP_TOKEN not configured — formula is attached to the release instead" + exit 0 + fi + git clone "https://x-access-token:${TAP_TOKEN}@github.com/toshok/homebrew-echojs.git" tap + mkdir -p tap/Formula + cp assets/echojs.rb tap/Formula/echojs.rb + cd tap + git add Formula/echojs.rb + git -c user.name="echojs release" -c user.email="toshok@gmail.com" \ + commit -m "echojs ${GITHUB_REF_NAME#v}" + git push + + - name: npm publish + env: + NPM_TOKEN: ${{ secrets.NPM_TOKEN }} + run: | + if [ -z "$NPM_TOKEN" ]; then + echo "NPM_TOKEN not configured — wrapper tgz is attached to the release instead" + exit 0 + fi + echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > "$HOME/.npmrc" + npm publish assets/toshok-echojs-*.tgz --access public + + # a machine that has never seen the repo: only the tarball + the + # README's documented prerequisites + smoke-linux: + needs: bootstrap + strategy: + fail-fast: false + matrix: + include: + - arch: arm64 + runner: ubuntu-24.04-arm + - arch: x86_64 + runner: ubuntu-24.04 + runs-on: ${{ matrix.runner }} + container: ubuntu:24.04 + steps: + - uses: actions/download-artifact@v4 + with: + name: echojs-dist-linux-${{ matrix.arch }} + + - name: install prerequisites (the README's list) + run: | + apt-get update -qq + apt-get install -y -qq curl ca-certificates gnupg lsb-release \ + software-properties-common build-essential libuv1-dev libunwind-dev + curl -sSf https://apt.llvm.org/llvm.sh -o /tmp/llvm.sh + chmod +x /tmp/llvm.sh + /tmp/llvm.sh 22 + + - name: install and compile + run: | + tar xzf echojs-*.tar.gz + sh ./echojs-*/install.sh + printf 'let xs = [1, 2, 3].map((x) => x * x);\nconsole.log(`squares: ${xs.join(",")}`);\n' > hello.js + PATH="/usr/lib/llvm-22/bin:$PATH" ejs -q -o hello hello.js + test "$(./hello)" = "squares: 1,4,9" + + smoke-macos: + needs: bootstrap + runs-on: macos-15 + steps: + - uses: actions/download-artifact@v4 + with: + name: echojs-dist-macos-arm64 + + - name: install prerequisites (the README's list) + run: brew install llvm + + - name: install and compile + run: | + tar xzf echojs-*.tar.gz + sh ./echojs-*/install.sh --prefix "$RUNNER_TEMP/prefix" + printf 'let xs = [1, 2, 3].map((x) => x * x);\nconsole.log(`squares: ${xs.join(",")}`);\n' > hello.js + "$RUNNER_TEMP/prefix/bin/ejs" -q -o hello hello.js + test "$(./hello)" = "squares: 1,4,9" diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 00000000..e7bfa0c2 --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,50 @@ +# Changelog + +All notable changes to echojs are recorded here, newest first. The +format follows [Keep a Changelog](https://keepachangelog.com); versions +follow [semver](https://semver.org) with the pre-1.0 reading: while the +major is 0, a minor bump may break things and a patch bump may not. + +Releases are cut by `packaging/prepare-release.sh `, which +rolls the Unreleased section into a dated version section, stamps the +version everywhere it lives, and tags `v`; pushing the tag +runs the release pipeline (a release is a green bootstrap matrix + +packaged artifacts + a clean-machine install smoke — see +`.github/workflows/release.yml`). + +## [Unreleased] + +### Added + +- The EIR compilation pipeline: an SSA IR between the AST and LLVM, + with a clang-style pass configuration (`-O0`..`-O3` suites, + `-f`/`-fno-` per-pass flags, `--print-passes`). +- Type-feedback optimization: shape tracking, guarded fast paths, + born-with-shape allocation, typed slots, allocation sinking, + devirtualization, and an export-boundary specialization wrapper. +- A generational, mostly-copying garbage collector with compaction, + precise young-generation roots from compiler-emitted gc-frames, and + `EJS_GC_*` debugging knobs. +- Relocatable per-platform dist tarballs (macOS arm64, Linux + arm64/x86_64) with a bundled prefix installer, a Homebrew formula + generator, and an npm wrapper package (`@toshok/echojs`). +- An LLVM toolchain policy: the driver discovers a matching-major + `opt`/`llc` (env `LLVM_BINDIR` override → build-baked path → + conventional locations → PATH) and refuses to run against a + different major. +- A value-based test harness whose baselines are independent of the + node version, and a fully self-hosted bootstrap proven by a + four-stage CI matrix on all three platforms. + +### Changed + +- The compiler sources are TypeScript throughout; babel is gone from + the toolchain (one `tsc` pass converts modules for the build). + +### Fixed + +- Too many runtime-correctness fixes to enumerate here (typeof null, + -0 semantics, Math.round ties, string-to-number edge cases, sparse + arrays, generator exception propagation, error prototype chains, + DataView indexing, and more) — see docs/runtime-p1-results.md and + docs/runtime-p3-results.md. diff --git a/docs/plans.md b/docs/plans.md index afb3a844..2edccedd 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -165,8 +165,14 @@ From repo to product. Detail: release-plan.md, compiler-plan.md. `//:test-dist` step, homebrew formula generator + libexec/exec- shim layout, npm wrapper with EJS_NPM_TARBALL override; CI smokes all three; hosted URLs await release-P3). -- [ ] **P9.3** versioning + release automation off the bootstrap - matrix (release-P3). +- [x] **P9.3** versioning + release automation off the bootstrap + matrix (release-P3). DONE 2026-07-30 — + docs/release-p3-results.md (CHANGELOG discipline + + prepare-release.sh stamping/tagging; ci matrix refactored into + reusable bootstrap.yml; release.yml on v-tags: version-check → + same matrix → draft release with tarballs/formula/npm tgz → + clean-machine container+runner smokes; npm wrapper is + @toshok/echojs, the bare name was taken). - [ ] **P9.4** getting-started surface (release-P4). - [ ] **P9.5** reusable native modules + IR-in-manifest cross-module linking (compiler-P4). diff --git a/docs/release-p2-results.md b/docs/release-p2-results.md index cd71e302..49c2386d 100644 --- a/docs/release-p2-results.md +++ b/docs/release-p2-results.md @@ -82,8 +82,10 @@ stays whole in one directory. `toshok/homebrew-echojs` tap, npm publish, version stamping (root package.json is still 0.0.0), and deb/rpm if tarball+install.sh proves insufficient. -- The npm package name `echojs` may be taken on the registry — - check at first publish (scoped fallback: `@toshok/echojs`). +- ~~The npm package name `echojs` may be taken on the registry — + check at first publish (scoped fallback: `@toshok/echojs`).~~ + RESOLVED in release-P3: it was taken (an unrelated 0.1.4); the + wrapper is `@toshok/echojs`. - macos ld's version-min warnings (release-P1 follow-on) now also surface through every package's compile smoke; still harmless, still noisy. diff --git a/docs/release-p3-results.md b/docs/release-p3-results.md new file mode 100644 index 00000000..7521b2cd --- /dev/null +++ b/docs/release-p3-results.md @@ -0,0 +1,94 @@ +# release-P3 results: versioning + release automation + +Status: DONE 2026-07-30 (P9.3 in plans.md). The machinery is in place +and verified as far as it can be without pushing a tag; the first real +release exercises the pipeline end to end. + +## The scheme + +- Semver, pre-1.0 reading (0.MINOR may break, PATCH may not), + documented in CHANGELOG.md's header. +- The version lives in exactly two files — `package.json` (what + buck-dist.sh stamps into the tarball/dist-info) and + `packaging/npm/package.json` (what pins the wrapper's download tag) + — plus the git tag. Nothing else carries a version; the release + pipeline refuses a tag where the three disagree. +- CHANGELOG.md is Keep-a-Changelog-shaped, newest first, with an + Unreleased section that must be non-empty to cut a release (an empty + entry means the release story wasn't written). Seeded with the + first-release Unreleased content. + +## Cutting a release + +`./packaging/prepare-release.sh 0.1.0` (local, offline): clean-tree +check, rolls Unreleased into `## [0.1.0] - `, stamps both +package.jsons via `npm version --no-git-tag-version` (which also +updates the lockfile's mirrored version), commits `release: v0.1.0`, +makes the annotated tag. It deliberately does NOT push — pushing the +tag is the human act that starts the pipeline. + +## The pipeline (.github/workflows/release.yml, on v tags) + +1. **version-check** — tag == both package.jsons, CHANGELOG section + exists. +2. **bootstrap** — ci.yml's jobs were refactored into a reusable + `bootstrap.yml` (`on: workflow_call`); CI and Release both call it, + so "a release is a green matrix" is literally the same workflow: + stage ladder + test-eir, dist tarballs + //:test-dist (which + includes the installer smoke), and the release-P2 package smokes on + all three platforms. +3. **publish** — downloads the three tarball artifacts, generates the + homebrew formula against the hosted asset URL (sha from the real + tarball), `npm pack`s the wrapper, extracts the tag's CHANGELOG + section as notes, and creates a **draft** GitHub release carrying + tarballs + formula + wrapper tgz. Publishing the draft is the + go-live act — draft asset URLs aren't public, so the formula and + the npm postinstall only resolve after that click. Two + shell-gated legs: push the formula to `toshok/homebrew-echojs` iff + `HOMEBREW_TAP_TOKEN` is configured, `npm publish --access public` + iff `NPM_TOKEN` is — an absent secret is a loudly-skipped step, + not a broken release. +4. **smoke-linux / smoke-macos** — the clean-machine proof the plan + asked for: a bare `ubuntu:24.04` container (both arches) and a + fresh macos runner that never see the repo install only the + tarball plus the README's documented prerequisites (apt.llvm.org + llvm-22 + build-essential + libuv/libunwind dev on linux; `brew + install llvm` on macos), run `install.sh`, and compile + run a + program through the installed layout. + +## npm name + +`echojs` is taken on the registry (an unrelated 0.1.4), so the wrapper +is `@toshok/echojs` (bin is still `ejs`); the release-P2 follow-on is +resolved. CI smoke globs updated for the scoped pack filename +(`toshok-echojs-*.tgz`). + +## Verified locally + +- prepare-release.sh dry-run in a scratch clone: stamps all four + files, rolls the changelog, tags v0.1.0; a second cut correctly + refuses on the now-empty Unreleased section. +- All three workflows parse and pass `actionlint` (only intentional + SC2016 infos remain: single-quoted JS template literals). +- make-formula.sh `--url` mode produces the hosted-URL formula with + the local tarball's sha256. + +## First-release checklist (for whoever pushes the button) + +1. `./packaging/prepare-release.sh 0.1.0` && `git push origin HEAD v0.1.0` +2. wait for the Release workflow: green matrix + draft release + smokes +3. publish the draft release (this makes formula/npm URLs real) +4. optional, once: create `toshok/homebrew-echojs` and set + `HOMEBREW_TAP_TOKEN`; set `NPM_TOKEN` for registry publishes — + until then the formula and wrapper tgz ride on the release page + +## Follow-ons + +- The publish job re-runs are not idempotent (`gh release create` + fails if the draft already exists) — delete the draft before + re-running, or teach the step `gh release view || create`. +- The linux smoke pins apt.llvm.org's llvm-22 spelling; when the + toolchain major moves, dist-info already carries it — the smoke + could read EJS_LLVM_MAJOR from the tarball instead of hardcoding. +- P9.4 (getting-started surface) should point the README at the + released packages instead of the repo build. diff --git a/docs/release-plan.md b/docs/release-plan.md index 0cf75ae0..7efd3395 100644 --- a/docs/release-plan.md +++ b/docs/release-plan.md @@ -29,11 +29,17 @@ answer for people who just want to download a package and go. the npm wrapper; every package uses an absolute-path exec shim because the driver doesn't chase symlinks. Hosted asset URLs, the real tap, and npm publish are release-P3's.) -- [ ] **release-P3 — Versioning + release automation.** Semver +- [x] **release-P3 — Versioning + release automation.** DONE + 2026-07-30 — docs/release-p3-results.md. Semver scheme, a changelog discipline, tagged releases built by CI from the bootstrap matrix (a release is a green matrix + packaged artifacts + smoke test of the installed package compiling a - hello-world on a clean machine/container). + hello-world on a clean machine/container). (Shipped: + CHANGELOG.md + prepare-release.sh + reusable bootstrap.yml + + release.yml drafting the release and running bare-container/ + fresh-runner install smokes; the tap push and npm publish legs + are shell-gated on their secrets. The first pushed tag is the + end-to-end proof.) - [ ] **release-P4 — Getting-started surface.** A quickstart README path that assumes the package (not the repo): install, compile a file, link a multi-module program; document the supported diff --git a/packaging/npm/README.md b/packaging/npm/README.md index 52000bd5..7cdf92f2 100644 --- a/packaging/npm/README.md +++ b/packaging/npm/README.md @@ -4,7 +4,7 @@ An ahead-of-time compiler for JavaScript. This package downloads the platform's prebuilt echojs toolchain at install time (macOS arm64, Linux arm64/x86_64) and exposes its `ejs` driver on your PATH. - npm install -g echojs + npm install -g @toshok/echojs ejs -o hello hello.js && ./hello Compiling needs an LLVM toolchain with the major version the release diff --git a/packaging/npm/package.json b/packaging/npm/package.json index 58222a53..a19f2fca 100644 --- a/packaging/npm/package.json +++ b/packaging/npm/package.json @@ -1,5 +1,5 @@ { - "name": "echojs", + "name": "@toshok/echojs", "version": "0.0.0", "description": "Ahead-of-time compiler for JavaScript — native toolchain wrapper", "bin": { diff --git a/packaging/prepare-release.sh b/packaging/prepare-release.sh new file mode 100755 index 00000000..db19e1e6 --- /dev/null +++ b/packaging/prepare-release.sh @@ -0,0 +1,72 @@ +#!/bin/sh +# Cut a release locally (release-P3): roll the CHANGELOG, stamp the +# version everywhere it lives, commit, and tag. Nothing is pushed — +# pushing the tag is the action that runs the release pipeline +# (.github/workflows/release.yml), so that stays a human decision: +# +# ./packaging/prepare-release.sh 0.1.0 +# git push origin HEAD "v0.1.0" +# +# The version lives in exactly two files — package.json (the dist +# tarball's source of truth, read by buck-dist.sh) and +# packaging/npm/package.json (the wrapper, whose version pins the +# release tag its postinstall downloads from) — plus the tag itself; +# release.yml's version-check job refuses a tag where they disagree. +set -eu + +VERSION="${1:-}" +case "$VERSION" in + *[!0-9.]*|"") echo "usage: $0 " >&2; exit 1 ;; +esac +echo "$VERSION" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$' || { + echo "error: '$VERSION' is not a major.minor.patch version" >&2 + exit 1 +} + +ROOT="$(cd "$(dirname "$0")/.." && pwd)" +cd "$ROOT" + +test -z "$(git status --porcelain)" || { + echo "error: working tree not clean" >&2 + exit 1 +} +! git rev-parse -q --verify "refs/tags/v$VERSION" > /dev/null || { + echo "error: tag v$VERSION already exists" >&2 + exit 1 +} + +# the Unreleased section must exist and have content — an empty +# changelog entry means the release story hasn't been written +grep -q '^## \[Unreleased\]' CHANGELOG.md || { + echo "error: CHANGELOG.md has no '## [Unreleased]' section" >&2 + exit 1 +} +BODY="$(awk '/^## \[Unreleased\]/{f=1; next} /^## /{f=0} f' CHANGELOG.md | grep -cv '^[[:space:]]*$' || true)" +[ "$BODY" -gt 0 ] || { + echo "error: the Unreleased section of CHANGELOG.md is empty — write the release notes first" >&2 + exit 1 +} + +TODAY="$(date +%Y-%m-%d)" +awk -v v="$VERSION" -v d="$TODAY" ' + /^## \[Unreleased\]$/ { print; print ""; print "## [" v "] - " d; next } + { print } +' CHANGELOG.md > CHANGELOG.md.new +mv CHANGELOG.md.new CHANGELOG.md + +# npm stamps package.json (and the lockfile's mirrored version) in place +npm version --no-git-tag-version "$VERSION" > /dev/null +(cd packaging/npm && npm version --no-git-tag-version "$VERSION" > /dev/null) + +git add CHANGELOG.md package.json package-lock.json packaging/npm/package.json +git commit -q -m "release: v$VERSION" +git tag -a "v$VERSION" -m "echojs $VERSION" + +echo "prepared v$VERSION:" +git --no-pager log --oneline -1 +echo +echo "next:" +echo " git push origin HEAD \"v$VERSION\" # runs the release pipeline" +echo "the pipeline drafts the GitHub release; publishing it (and the" +echo "npm/tap pushes, if their secrets are configured) is described in" +echo "docs/release-p3-results.md" From 119f107583f7d56adb99d557b36db64b49005cbe Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 15:21:12 -0700 Subject: [PATCH 140/146] eir: npm wrapper is @pirouette/echojs (the @pirouette org) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The bare name was taken; @toshok/echojs never shipped. Scoped pack filename (pirouette-echojs-*.tgz) followed through the CI smoke globs and the release publish step. Also: a relative EJS_NPM_TARBALL now resolves against INIT_CWD — postinstall's cwd is the package dir, so relative overrides pointed at nothing. Verified: npm pack + install with a relative EJS_NPM_TARBALL + .bin/ejs compile green; actionlint clean. Co-Authored-By: Claude Fable 5 --- .github/workflows/bootstrap.yml | 4 ++-- .github/workflows/release.yml | 2 +- CHANGELOG.md | 2 +- docs/plans.md | 2 +- docs/release-p2-results.md | 4 ++-- docs/release-p3-results.md | 8 +++++--- packaging/npm/README.md | 2 +- packaging/npm/install.js | 3 +++ packaging/npm/package.json | 2 +- 9 files changed, 17 insertions(+), 12 deletions(-) diff --git a/.github/workflows/bootstrap.yml b/.github/workflows/bootstrap.yml index b946568c..bd1c6909 100644 --- a/.github/workflows/bootstrap.yml +++ b/.github/workflows/bootstrap.yml @@ -109,7 +109,7 @@ jobs: mkdir npm-smoke && cd npm-smoke npm init -y > /dev/null EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ - npm install --no-fund --no-audit ../toshok-echojs-*.tgz + npm install --no-fund --no-audit ../pirouette-echojs-*.tgz ./node_modules/.bin/ejs -q -o smoke.exe ../smoke.js test "$(./smoke.exe)" = "ok 23" @@ -201,7 +201,7 @@ jobs: mkdir npm-smoke && cd npm-smoke npm init -y > /dev/null EJS_NPM_TARBALL="$(echo "$GITHUB_WORKSPACE"/dist-out/echojs-*.tar.gz)" \ - npm install --no-fund --no-audit ../toshok-echojs-*.tgz + npm install --no-fund --no-audit ../pirouette-echojs-*.tgz echo 'console.log(`ok ${[1,2].map((x) => x + 1).join("")}`)' > smoke.js ./node_modules/.bin/ejs -q -o smoke.exe smoke.js test "$(./smoke.exe)" = "ok 23" diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 19670cc6..46f6b927 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -134,7 +134,7 @@ jobs: exit 0 fi echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > "$HOME/.npmrc" - npm publish assets/toshok-echojs-*.tgz --access public + npm publish assets/pirouette-echojs-*.tgz --access public # a machine that has never seen the repo: only the tarball + the # README's documented prerequisites diff --git a/CHANGELOG.md b/CHANGELOG.md index e7bfa0c2..0608603e 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -27,7 +27,7 @@ packaged artifacts + a clean-machine install smoke — see `EJS_GC_*` debugging knobs. - Relocatable per-platform dist tarballs (macOS arm64, Linux arm64/x86_64) with a bundled prefix installer, a Homebrew formula - generator, and an npm wrapper package (`@toshok/echojs`). + generator, and an npm wrapper package (`@pirouette/echojs`). - An LLVM toolchain policy: the driver discovers a matching-major `opt`/`llc` (env `LLVM_BINDIR` override → build-baked path → conventional locations → PATH) and refuses to run against a diff --git a/docs/plans.md b/docs/plans.md index 2edccedd..eb127208 100644 --- a/docs/plans.md +++ b/docs/plans.md @@ -172,7 +172,7 @@ From repo to product. Detail: release-plan.md, compiler-plan.md. reusable bootstrap.yml; release.yml on v-tags: version-check → same matrix → draft release with tarballs/formula/npm tgz → clean-machine container+runner smokes; npm wrapper is - @toshok/echojs, the bare name was taken). + @pirouette/echojs, the bare name was taken). - [ ] **P9.4** getting-started surface (release-P4). - [ ] **P9.5** reusable native modules + IR-in-manifest cross-module linking (compiler-P4). diff --git a/docs/release-p2-results.md b/docs/release-p2-results.md index 49c2386d..63e9bcdc 100644 --- a/docs/release-p2-results.md +++ b/docs/release-p2-results.md @@ -83,9 +83,9 @@ stays whole in one directory. package.json is still 0.0.0), and deb/rpm if tarball+install.sh proves insufficient. - ~~The npm package name `echojs` may be taken on the registry — - check at first publish (scoped fallback: `@toshok/echojs`).~~ + check at first publish (scoped fallback).~~ RESOLVED in release-P3: it was taken (an unrelated 0.1.4); the - wrapper is `@toshok/echojs`. + wrapper is scoped — `@pirouette/echojs` (the @pirouette npm org). - macos ld's version-min warnings (release-P1 follow-on) now also surface through every package's compile smoke; still harmless, still noisy. diff --git a/docs/release-p3-results.md b/docs/release-p3-results.md index 7521b2cd..828f7ab9 100644 --- a/docs/release-p3-results.md +++ b/docs/release-p3-results.md @@ -59,9 +59,11 @@ tag is the human act that starts the pipeline. ## npm name `echojs` is taken on the registry (an unrelated 0.1.4), so the wrapper -is `@toshok/echojs` (bin is still `ejs`); the release-P2 follow-on is -resolved. CI smoke globs updated for the scoped pack filename -(`toshok-echojs-*.tgz`). +is `@pirouette/echojs` under the @pirouette npm org (bin is still +`ejs`); the release-P2 follow-on is resolved. CI smoke globs updated +for the scoped pack filename (`pirouette-echojs-*.tgz`). A relative +`EJS_NPM_TARBALL` resolves against `INIT_CWD` (where `npm install` was +invoked), since postinstall's cwd is the package directory. ## Verified locally diff --git a/packaging/npm/README.md b/packaging/npm/README.md index 7cdf92f2..d582ce3f 100644 --- a/packaging/npm/README.md +++ b/packaging/npm/README.md @@ -4,7 +4,7 @@ An ahead-of-time compiler for JavaScript. This package downloads the platform's prebuilt echojs toolchain at install time (macOS arm64, Linux arm64/x86_64) and exposes its `ejs` driver on your PATH. - npm install -g @toshok/echojs + npm install -g @pirouette/echojs ejs -o hello hello.js && ./hello Compiling needs an LLVM toolchain with the major version the release diff --git a/packaging/npm/install.js b/packaging/npm/install.js index fd148041..cce92271 100644 --- a/packaging/npm/install.js +++ b/packaging/npm/install.js @@ -38,6 +38,9 @@ async function main() { const work = fs.mkdtempSync(path.join(os.tmpdir(), "echojs-npm-")); let tarball = process.env["EJS_NPM_TARBALL"]; if (tarball) { + // postinstall runs with cwd = the package dir; a relative + // override means relative to where `npm install` was invoked + tarball = path.resolve(process.env["INIT_CWD"] || process.cwd(), tarball); if (!fs.existsSync(tarball)) fail(`EJS_NPM_TARBALL=${tarball} does not exist`); console.log(`echojs install: using ${tarball}`); } else { diff --git a/packaging/npm/package.json b/packaging/npm/package.json index a19f2fca..ffc5eba7 100644 --- a/packaging/npm/package.json +++ b/packaging/npm/package.json @@ -1,5 +1,5 @@ { - "name": "@toshok/echojs", + "name": "@pirouette/echojs", "version": "0.0.0", "description": "Ahead-of-time compiler for JavaScript — native toolchain wrapper", "bin": { From 1e5b6396004651154d49fd43d884b06e06a0073a Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 15:29:39 -0700 Subject: [PATCH 141/146] =?UTF-8?q?eir:=20npm=20publishes=20via=20OIDC=20t?= =?UTF-8?q?rusted=20publishing=20=E2=80=94=20no=20npm=20token?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Per docs.npmjs.com/trusted-publishers: the publish job gets id-token: write and node 24 + npm@latest (trusted publishing needs npm >= 11.5.1 on node >= 22.14); npm exchanges the GitHub OIDC token for short-lived credentials and generates provenance attestations automatically. Gated on the NPM_TRUSTED_PUBLISHING repo VARIABLE so releases stay green until the publisher is configured on npmjs.com (owner toshok, repo echojs, workflow release.yml — the filename is what the config matches, and the publish step must live in this workflow, not a reusable one, since validation checks the calling workflow). The publish uses the packaging/npm directory rather than the packed tgz so provenance sees the build context; the wrapper's package.json gains repository.directory (provenance matches the repository field exactly) and publishConfig.access=public (scoped first publish). NPM_TOKEN is gone from the workflow and docs. Co-Authored-By: Claude Fable 5 --- .github/workflows/release.yml | 38 +++++++++++++++++++++++++++-------- docs/release-p3-results.md | 34 +++++++++++++++++++++++++------ docs/release-plan.md | 7 ++++--- packaging/npm/package.json | 6 +++++- 4 files changed, 67 insertions(+), 18 deletions(-) diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 46f6b927..4135e53f 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -13,8 +13,16 @@ # Publishing the draft is the go-live act (draft # asset urls are not public, so the formula and npm # postinstall only resolve once it's published). -# npm publish / tap push run iff their secrets -# (NPM_TOKEN / HOMEBREW_TAP_TOKEN) are configured. +# The tap push runs iff HOMEBREW_TAP_TOKEN is +# configured. npm publish uses OIDC trusted +# publishing (docs.npmjs.com/trusted-publishers) — +# no token; npmjs trusts THIS workflow file +# (owner/repo + filename release.yml are what the +# trusted-publisher config matches, so renaming +# this file breaks publishing) — gated on the +# NPM_TRUSTED_PUBLISHING repo variable being "true" +# so releases stay green until the publisher is +# configured on npmjs.com. # smoke-* clean-machine proof: a bare ubuntu container and a # fresh macos runner install ONLY the tarball + the # documented prerequisites, then compile and run a @@ -58,9 +66,18 @@ jobs: publish: needs: bootstrap runs-on: ubuntu-24.04 + permissions: + contents: write + id-token: write # OIDC token for npm trusted publishing steps: - uses: actions/checkout@v4 + # trusted publishing needs npm >= 11.5.1 on node >= 22.14 + - uses: actions/setup-node@v4 + with: + node-version: 24 + - run: npm install -g npm@latest && npm --version + - uses: actions/download-artifact@v4 with: pattern: echojs-dist-* @@ -125,16 +142,21 @@ jobs: commit -m "echojs ${GITHUB_REF_NAME#v}" git push - - name: npm publish + # OIDC trusted publishing: no token, npm exchanges this job's + # id-token for short-lived credentials and generates provenance + # attestations automatically. Publishes the package DIRECTORY + # (same bits as the attached tgz — both come from packaging/npm + # at this ref) so provenance sees the build context. + - name: npm publish (trusted publishing) env: - NPM_TOKEN: ${{ secrets.NPM_TOKEN }} + TP_ENABLED: ${{ vars.NPM_TRUSTED_PUBLISHING }} run: | - if [ -z "$NPM_TOKEN" ]; then - echo "NPM_TOKEN not configured — wrapper tgz is attached to the release instead" + if [ "$TP_ENABLED" != "true" ]; then + echo "NPM_TRUSTED_PUBLISHING repo variable not set — wrapper tgz is attached to the release instead" + echo "(configure the trusted publisher on npmjs.com first: owner toshok, repo echojs, workflow release.yml)" exit 0 fi - echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > "$HOME/.npmrc" - npm publish assets/pirouette-echojs-*.tgz --access public + npm publish ./packaging/npm --access public # a machine that has never seen the repo: only the tarball + the # README's documented prerequisites diff --git a/docs/release-p3-results.md b/docs/release-p3-results.md index 828f7ab9..9456bcc7 100644 --- a/docs/release-p3-results.md +++ b/docs/release-p3-results.md @@ -44,10 +44,25 @@ tag is the human act that starts the pipeline. tarballs + formula + wrapper tgz. Publishing the draft is the go-live act — draft asset URLs aren't public, so the formula and the npm postinstall only resolve after that click. Two - shell-gated legs: push the formula to `toshok/homebrew-echojs` iff - `HOMEBREW_TAP_TOKEN` is configured, `npm publish --access public` - iff `NPM_TOKEN` is — an absent secret is a loudly-skipped step, - not a broken release. + shell-gated legs, each loudly skipped when unconfigured rather + than breaking the release: the formula push to + `toshok/homebrew-echojs` (iff `HOMEBREW_TAP_TOKEN` is set — a git + push needs a credential), and `npm publish` via **OIDC trusted + publishing** (docs.npmjs.com/trusted-publishers): no token at all — + the job has `id-token: write`, npm ≥ 11.5.1 exchanges the GitHub + OIDC token for short-lived credentials, and provenance + attestations are generated automatically. Gated on the + `NPM_TRUSTED_PUBLISHING` repo *variable* being `true`, flipped + after the trusted publisher is configured on npmjs.com. Two + load-bearing details: the publisher config matches owner/repo + + the workflow *filename* (`release.yml` — renaming the file breaks + publishing; the publish step must also live in this workflow, not + a reusable one, since validation checks the calling workflow), and + the wrapper's `repository` field must match the repo exactly + (`git+https://github.com/toshok/echojs.git` + `directory: + packaging/npm`). The publish uses the package directory, not the + tgz, so provenance sees the build context; `publishConfig.access: + public` is baked into the wrapper's package.json. 4. **smoke-linux / smoke-macos** — the clean-machine proof the plan asked for: a bare `ubuntu:24.04` container (both arches) and a fresh macos runner that never see the repo install only the @@ -81,8 +96,15 @@ invoked), since postinstall's cwd is the package directory. 2. wait for the Release workflow: green matrix + draft release + smokes 3. publish the draft release (this makes formula/npm URLs real) 4. optional, once: create `toshok/homebrew-echojs` and set - `HOMEBREW_TAP_TOKEN`; set `NPM_TOKEN` for registry publishes — - until then the formula and wrapper tgz ride on the release page + `HOMEBREW_TAP_TOKEN` — until then the formula rides on the release + page +5. optional, once, for npm: on npmjs.com, add a trusted publisher to + `@pirouette/echojs` (org `toshok`, repo `echojs`, workflow + `release.yml`, allowed action `npm publish`), then set the repo + variable `NPM_TRUSTED_PUBLISHING=true`. If npmjs won't accept a + trusted publisher for a never-published package, do the first + `npm publish --access public` locally as an @pirouette member, + then configure it — every later release publishes via OIDC ## Follow-ons diff --git a/docs/release-plan.md b/docs/release-plan.md index 7efd3395..c26dfe23 100644 --- a/docs/release-plan.md +++ b/docs/release-plan.md @@ -37,9 +37,10 @@ answer for people who just want to download a package and go. hello-world on a clean machine/container). (Shipped: CHANGELOG.md + prepare-release.sh + reusable bootstrap.yml + release.yml drafting the release and running bare-container/ - fresh-runner install smokes; the tap push and npm publish legs - are shell-gated on their secrets. The first pushed tag is the - end-to-end proof.) + fresh-runner install smokes; the tap push is gated on its + token, npm publishes via OIDC trusted publishing — no npm + token exists anywhere. The first pushed tag is the end-to-end + proof.) - [ ] **release-P4 — Getting-started surface.** A quickstart README path that assumes the package (not the repo): install, compile a file, link a multi-module program; document the supported diff --git a/packaging/npm/package.json b/packaging/npm/package.json index ffc5eba7..b0c387b2 100644 --- a/packaging/npm/package.json +++ b/packaging/npm/package.json @@ -26,7 +26,11 @@ }, "repository": { "type": "git", - "url": "git+https://github.com/toshok/echojs.git" + "url": "git+https://github.com/toshok/echojs.git", + "directory": "packaging/npm" + }, + "publishConfig": { + "access": "public" }, "author": "Chris Toshok ", "license": "MIT", From 13eb58cda3fe543fffea36cfb0e6b1b0020bb95f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 15:56:32 -0700 Subject: [PATCH 142/146] =?UTF-8?q?eir:=20version=200.2.0=20=E2=80=94=20th?= =?UTF-8?q?e=202016=20era=20already=20released=200.1.0?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The old make-build shipped unprefixed tags up to 0.1.0; the pipeline's v-prefixed tags wouldn't collide, but the version number shouldn't be reused. The tree now carries the to-be-released version between releases, so prepare-release.sh stamps with --allow-same-version (npm version otherwise errors on 'Version not changed' — verified by a scratch-clone 0.2.0 cut with the version pre-stamped). Co-Authored-By: Claude Fable 5 --- docs/release-p3-results.md | 15 ++++++++++----- package-lock.json | 4 ++-- package.json | 2 +- packaging/npm/package.json | 2 +- packaging/prepare-release.sh | 14 ++++++++------ 5 files changed, 22 insertions(+), 15 deletions(-) diff --git a/docs/release-p3-results.md b/docs/release-p3-results.md index 9456bcc7..bf0c3cbf 100644 --- a/docs/release-p3-results.md +++ b/docs/release-p3-results.md @@ -7,7 +7,12 @@ release exercises the pipeline end to end. ## The scheme - Semver, pre-1.0 reading (0.MINOR may break, PATCH may not), - documented in CHANGELOG.md's header. + documented in CHANGELOG.md's header. The first pipeline release is + **0.2.0**: the 2016-era make-build era already shipped tags up to + `0.1.0` (unprefixed — the pipeline's `v`-prefixed tags can't + collide, but the version numbers shouldn't be reused). The tree + carries the to-be-released version between releases (0.2.0 now); + prepare-release stamps with `--allow-same-version` so that's fine. - The version lives in exactly two files — `package.json` (what buck-dist.sh stamps into the tarball/dist-info) and `packaging/npm/package.json` (what pins the wrapper's download tag) @@ -20,10 +25,10 @@ release exercises the pipeline end to end. ## Cutting a release -`./packaging/prepare-release.sh 0.1.0` (local, offline): clean-tree -check, rolls Unreleased into `## [0.1.0] - `, stamps both +`./packaging/prepare-release.sh 0.2.0` (local, offline): clean-tree +check, rolls Unreleased into `## [0.2.0] - `, stamps both package.jsons via `npm version --no-git-tag-version` (which also -updates the lockfile's mirrored version), commits `release: v0.1.0`, +updates the lockfile's mirrored version), commits `release: v0.2.0`, makes the annotated tag. It deliberately does NOT push — pushing the tag is the human act that starts the pipeline. @@ -92,7 +97,7 @@ invoked), since postinstall's cwd is the package directory. ## First-release checklist (for whoever pushes the button) -1. `./packaging/prepare-release.sh 0.1.0` && `git push origin HEAD v0.1.0` +1. `./packaging/prepare-release.sh 0.2.0` && `git push origin HEAD v0.2.0` 2. wait for the Release workflow: green matrix + draft release + smokes 3. publish the draft release (this makes formula/npm URLs real) 4. optional, once: create `toshok/homebrew-echojs` and set diff --git a/package-lock.json b/package-lock.json index 57c6d675..919a23df 100644 --- a/package-lock.json +++ b/package-lock.json @@ -1,12 +1,12 @@ { "name": "echojs", - "version": "0.0.0", + "version": "0.2.0", "lockfileVersion": 2, "requires": true, "packages": { "": { "name": "echojs", - "version": "0.0.0", + "version": "0.2.0", "license": "MIT", "dependencies": { "colors": "^1.4.0", diff --git a/package.json b/package.json index b2177b63..97aec8d9 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "echojs", - "version": "0.0.0", + "version": "0.2.0", "description": "Compile ES6 to native code", "main": "ejs.js", "bin": { diff --git a/packaging/npm/package.json b/packaging/npm/package.json index b0c387b2..160847e2 100644 --- a/packaging/npm/package.json +++ b/packaging/npm/package.json @@ -1,6 +1,6 @@ { "name": "@pirouette/echojs", - "version": "0.0.0", + "version": "0.2.0", "description": "Ahead-of-time compiler for JavaScript — native toolchain wrapper", "bin": { "ejs": "bin/ejs.js" diff --git a/packaging/prepare-release.sh b/packaging/prepare-release.sh index db19e1e6..7c2223ca 100755 --- a/packaging/prepare-release.sh +++ b/packaging/prepare-release.sh @@ -4,8 +4,8 @@ # pushing the tag is the action that runs the release pipeline # (.github/workflows/release.yml), so that stays a human decision: # -# ./packaging/prepare-release.sh 0.1.0 -# git push origin HEAD "v0.1.0" +# ./packaging/prepare-release.sh 0.2.0 +# git push origin HEAD "v0.2.0" # # The version lives in exactly two files — package.json (the dist # tarball's source of truth, read by buck-dist.sh) and @@ -54,9 +54,11 @@ awk -v v="$VERSION" -v d="$TODAY" ' ' CHANGELOG.md > CHANGELOG.md.new mv CHANGELOG.md.new CHANGELOG.md -# npm stamps package.json (and the lockfile's mirrored version) in place -npm version --no-git-tag-version "$VERSION" > /dev/null -(cd packaging/npm && npm version --no-git-tag-version "$VERSION" > /dev/null) +# npm stamps package.json (and the lockfile's mirrored version) in +# place; --allow-same-version because the tree may already carry the +# to-be-released version (it has since 0.2.0 was pre-stamped) +npm version --no-git-tag-version --allow-same-version "$VERSION" > /dev/null +(cd packaging/npm && npm version --no-git-tag-version --allow-same-version "$VERSION" > /dev/null) git add CHANGELOG.md package.json package-lock.json packaging/npm/package.json git commit -q -m "release: v$VERSION" @@ -68,5 +70,5 @@ echo echo "next:" echo " git push origin HEAD \"v$VERSION\" # runs the release pipeline" echo "the pipeline drafts the GitHub release; publishing it (and the" -echo "npm/tap pushes, if their secrets are configured) is described in" +echo "OIDC npm publish / tap push, if configured) is described in" echo "docs/release-p3-results.md" From 649c563a842e19c2b78cb14cc1c41f153d406e7d Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 16:12:44 -0700 Subject: [PATCH 143/146] =?UTF-8?q?eir:=20fix=20the=20platform=20CI=20reds?= =?UTF-8?q?=20=E2=80=94=20remset=20type=20+=20the=20ignored=20npm=20shim?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Two independent failures, both now understood end to end: - linux (both arches, every red run since Jul 28): heap_priv.remset_other was declared ejsval** while _ejs_heap.remset is void** (the remset holds object pointers). Apple clang warns on the mismatched assignments; linux clang-22 makes -Wincompatible-pointer-types a default error, so the runtime never compiled. Type corrected (and the mallocs spell sizeof(void*)); no codegen change. Swept every runtime *.c with -Werror=incompatible-pointer-types + -Werror=incompatible-function-pointer-types against buck's argsfile — this was the only instance. - macos (the release-P2 npm smoke): packaging/npm/bin/ejs.js was never committed — the root .gitignore's unanchored 'ejs.js' pattern (guarding the old build's generated driver) swallowed it, so CI's npm pack shipped 3 files and node_modules/.bin/ejs was never created. Pattern anchored to /ejs.js, shim added. Co-Authored-By: Claude Fable 5 --- packaging/npm/bin/ejs.js | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 packaging/npm/bin/ejs.js diff --git a/packaging/npm/bin/ejs.js b/packaging/npm/bin/ejs.js new file mode 100644 index 00000000..cab1cddd --- /dev/null +++ b/packaging/npm/bin/ejs.js @@ -0,0 +1,25 @@ +#!/usr/bin/env node +// Exec shim for the npm wrapper (release-P2). node realpaths the main +// module, so __dirname is the package's true location even when npm +// invokes this through the node_modules/.bin symlink — and the driver +// binary therefore sees an argv[0] it can resolve include/ and lib/ +// against (it does not chase symlinks itself). +"use strict"; + +const path = require("path"); +const fs = require("fs"); +const { spawnSync } = require("child_process"); + +const exe = path.join(__dirname, "..", "dist", "bin", "ejs"); +if (!fs.existsSync(exe)) { + console.error("ejs: native toolchain missing — the echojs postinstall did not run or failed;"); + console.error(" reinstall the package (npm rebuild echojs) and check its output."); + process.exit(1); +} + +const r = spawnSync(exe, process.argv.slice(2), { stdio: "inherit" }); +if (r.error) { + console.error(`ejs: failed to run ${exe}: ${r.error.message}`); + process.exit(1); +} +process.exit(r.status === null ? 1 : r.status); From 5200b25dd074a22e87af3e2c08839c865ba11ec0 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 16:19:34 -0700 Subject: [PATCH 144/146] =?UTF-8?q?eir:=20the=20rest=20of=20the=20CI=20fix?= =?UTF-8?q?=20=E2=80=94=20remset=20type=20+=20gitignore=20anchor?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 649c563's message described these changes but staged only the npm shim; this is the remset_other ejsval** -> void** correction (the linux clang-22 default error), the sizeof(void*) malloc spellings, and the /ejs.js gitignore anchor that had swallowed the shim. Co-Authored-By: Claude Fable 5 --- .gitignore | 2 +- runtime/ejs-gc-internal.h | 2 +- runtime/ejs-gc-minor.c | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/.gitignore b/.gitignore index 2f23cf07..11f49ee6 100644 --- a/.gitignore +++ b/.gitignore @@ -13,7 +13,7 @@ *.s *.exe -ejs.js +/ejs.js ejs.exe ejs.exe.stage1 ejs.exe.stage2 diff --git a/runtime/ejs-gc-internal.h b/runtime/ejs-gc-internal.h index 1bbb90ad..d5342067 100644 --- a/runtime/ejs-gc-internal.h +++ b/runtime/ejs-gc-internal.h @@ -263,7 +263,7 @@ typedef struct { // front and processes the snapshot; slots whose referent stays young // (pinned) re-append into the live buffer — old→young edges CARRY // across cycles for as long as the target remains in the nursery. - ejsval** remset_other; + void** remset_other; // stats (reported under EJS_GC_PROFILE) uint64_t minors, minor_usec_total, minor_usec_max; uint64_t promoted_objs, promoted_bytes, minor_pins, remset_peak, overflow_minors; diff --git a/runtime/ejs-gc-minor.c b/runtime/ejs-gc-minor.c index 0035ade8..7c296006 100644 --- a/runtime/ejs-gc-minor.c +++ b/runtime/ejs-gc-minor.c @@ -688,8 +688,8 @@ nursery_init(void) heap_priv.nursery_arena = arena; _ejs_heap.nursery_base = (void*)arena; _ejs_heap.nursery_end = arena->end; - _ejs_heap.remset = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); + _ejs_heap.remset = malloc (NURSERY_REMSET_CAPACITY * sizeof(void*)); _ejs_heap.remset_capacity = NURSERY_REMSET_CAPACITY; - heap_priv.remset_other = malloc (NURSERY_REMSET_CAPACITY * sizeof(ejsval*)); + heap_priv.remset_other = malloc (NURSERY_REMSET_CAPACITY * sizeof(void*)); } // ===================== end nursery ========================================= From 9f2484618e022eb59660bc4986c1223d8c5b1f9f Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 18:40:06 -0700 Subject: [PATCH 145/146] =?UTF-8?q?eir:=20never=20publish=20uninitialized?= =?UTF-8?q?=20dense=20array=20elements=20=E2=80=94=20the=20linux=20stage1?= =?UTF-8?q?=20crash?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit _ejs_array_new(n, fill=false) malloc'd the dense element buffer, skipped initializing it, and still published array_length = n. The array scan specop walks [0, length), and callers like splice run GC-capable code (per-element Get/ToString) between the alloc and their stores — so a minor could scan n uninitialized malloc words as ejsvals. On glibc the recycled buffer holds stale pointers into young pages; the mover evacuates the swept, poison-filled cell and later dispatches through the copy's garbage ops. That was the linux bootstrap red: SIGSEGV on x86_64, the page->young assert on arm64, and the flaky per-test stage1 compiler crashes — deterministic in an ubuntu:24.04 container, latent since the gc-P2 mover landed (linux CI's last green predates it; macos survives on allocator-content luck, the window is real on every platform). Fix: hole-fill [0, numElements) unconditionally; the `fill` flag keeps only documentation value. Audited the other element/length publish sites (constructor argc path, push/pop dense, splice, the grow-on-store paths): all hole-fill first, calloc, or have no GC point inside the window. Verified in the container (linux-arm64): the stage2 self-compile that crashed at module 10 passes repeatedly — including under three MALLOC_PERTURB_ patterns — with a poison-evacuation tripwire armed in minor_process_slot; full linux ladder + macos matrix runs in flight. Co-Authored-By: Claude Fable 5 --- runtime/ejs-array.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/runtime/ejs-array.c b/runtime/ejs-array.c index 17fca811..e180b6bf 100644 --- a/runtime/ejs-array.c +++ b/runtime/ejs-array.c @@ -215,10 +215,20 @@ _ejs_array_new (int64_t numElements, EJSBool fill) rv->dense.array_alloc = numElements + 5; rv->dense.elements = (ejsval*)malloc(rv->dense.array_alloc * sizeof (ejsval)); - if (fill) { - for (int i = 0; i < numElements; i ++) - rv->dense.elements[i] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); - } + // ALWAYS initialize [0, numElements): array_length is published + // below, so the scan specop walks these slots — and a GC can run + // before the caller stores a single element. Recycled malloc + // memory holds stale ejsvals (dead young pointers), and the + // mover evacuates whatever the scan reads: on glibc this was a + // deterministic poison-evacuation crash (fill=false callers + // like splice were a scan-of-garbage window on every platform, + // macos just kept surviving it by allocator-content luck). + // `fill` now only distinguishes "caller wants holes" from + // "caller overwrites immediately" — both get holes, the flag + // stays for the call sites' documentation value. + (void)fill; + for (int i = 0; i < numElements; i ++) + rv->dense.elements[i] = MAGIC_TO_EJSVAL_IMPL(EJS_ARRAY_HOLE); } rv->array_length = numElements; From d4b4453b6f85281bf6359dbefc4861ca94290e34 Mon Sep 17 00:00:00 2001 From: Chris Toshok Date: Thu, 30 Jul 2026 18:52:11 -0700 Subject: [PATCH 146/146] eir: install buck2 via dtolnay/install-buck2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Replaces the hand-rolled curl + zstd download of the facebook/buck2 `latest` release binary in both bootstrap jobs — the action installs the same release and owns the platform selection, so the buck2_triple matrix key and the zstd install-time dependency go away. Co-Authored-By: Claude Fable 5 --- .github/workflows/bootstrap.yml | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) diff --git a/.github/workflows/bootstrap.yml b/.github/workflows/bootstrap.yml index bd1c6909..d7d9fda2 100644 --- a/.github/workflows/bootstrap.yml +++ b/.github/workflows/bootstrap.yml @@ -32,16 +32,13 @@ jobs: - name: Install llvm run: | - brew install llvm zstd + brew install llvm "$(brew --prefix llvm)/bin/llvm-config" --version - # buck2 isn't in homebrew core (locally it comes from the - # facebook/fb tap); use the release binary like the linux jobs - - name: Install buck2 - run: | - curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-aarch64-apple-darwin.zst" -o /tmp/buck2.zst - sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' - buck2 --version + # the facebook/buck2 `latest` release binary, same as before — + # the action just owns the platform selection and unpacking + - uses: dtolnay/install-buck2@latest + - run: buck2 --version # unpinned (runtime-P3): the value-based harness serializes logged # values itself (test/harness-console-shim.js) on both the node and @@ -131,10 +128,8 @@ jobs: include: - arch: arm64 runner: ubuntu-24.04-arm - buck2_triple: aarch64-unknown-linux-gnu - arch: x86_64 runner: ubuntu-24.04 - buck2_triple: x86_64-unknown-linux-gnu steps: - uses: actions/checkout@v4 with: @@ -143,7 +138,7 @@ jobs: - name: Install packages run: | sudo apt-get update -qq - sudo apt-get install -y -qq build-essential cmake zstd libunwind-dev libuv1-dev + sudo apt-get install -y -qq build-essential cmake libunwind-dev libuv1-dev - name: Install llvm 22 run: | @@ -154,11 +149,8 @@ jobs: # prelude's cxx toolchain wants a bare clang++ on PATH echo "/usr/lib/llvm-22/bin" >> "$GITHUB_PATH" - - name: Install buck2 - run: | - curl -sL "https://github.com/facebook/buck2/releases/download/latest/buck2-${{ matrix.buck2_triple }}.zst" -o /tmp/buck2.zst - sudo sh -c 'zstd -qd /tmp/buck2.zst -o /usr/local/bin/buck2 && chmod +x /usr/local/bin/buck2' - buck2 --version + - uses: dtolnay/install-buck2@latest + - run: buck2 --version # unpinned (runtime-P3) — see the macOS job's note - uses: actions/setup-node@v4