Branch: refs/heads/Cog Home: https://github.com/OpenSmalltalk/opensmalltalk-vm Commit: 30d52787f7013aab83b6b811ee0ae94b004fa487 https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/30d52787f7013aab83b... Author: Eliot Miranda eliot.miranda@gmail.com Date: 2021-07-09 (Fri, 09 Jul 2021)

Changed paths: M build.macos64ARMv8/HowToBuild M build.macos64ARMv8/common/Makefile.rules M build.macos64ARMv8/common/Makefile.vm A spur64src/vm/_variable_order M spur64src/vm/cogit.h M spur64src/vm/cogitARMv8.c M spur64src/vm/cogitX64SysV.c M spur64src/vm/cogitX64WIN64.c M spur64src/vm/cointerp.c M spur64src/vm/cointerp.h M spur64src/vm/cointerpmt.c M spur64src/vm/cointerpmt.h M spur64src/vm/gcc3x-cointerp.c M spur64src/vm/gcc3x-cointerpmt.c A spur64src/vm/variable_order A spurlowcode64src/vm/_variable_order M spurlowcode64src/vm/cogit.h M spurlowcode64src/vm/cogitARMv8.c M spurlowcode64src/vm/cogitX64SysV.c M spurlowcode64src/vm/cogitX64WIN64.c M spurlowcode64src/vm/cointerp.c M spurlowcode64src/vm/cointerp.h M spurlowcode64src/vm/gcc3x-cointerp.c A spurlowcode64src/vm/variable_order A spurlowcodesrc/vm/_variable_order M spurlowcodesrc/vm/cogit.h M spurlowcodesrc/vm/cogitARMv5.c M spurlowcodesrc/vm/cogitIA32.c M spurlowcodesrc/vm/cogitMIPSEL.c M spurlowcodesrc/vm/cointerp.c M spurlowcodesrc/vm/cointerp.h M spurlowcodesrc/vm/gcc3x-cointerp.c A spurlowcodesrc/vm/variable_order M spurlowcodestack64src/vm/gcc3x-interp.c M spurlowcodestack64src/vm/interp.c M spurlowcodestacksrc/vm/gcc3x-interp.c M spurlowcodestacksrc/vm/interp.c A spursista64src/vm/_variable_order M spursista64src/vm/cogit.h M spursista64src/vm/cogitARMv8.c M spursista64src/vm/cogitX64SysV.c M spursista64src/vm/cogitX64WIN64.c M spursista64src/vm/cointerp.c M spursista64src/vm/cointerp.h M spursista64src/vm/gcc3x-cointerp.c A spursista64src/vm/variable_order A spursistasrc/vm/_variable_order M spursistasrc/vm/cogit.h M spursistasrc/vm/cogitARMv5.c M spursistasrc/vm/cogitIA32.c M spursistasrc/vm/cogitMIPSEL.c M spursistasrc/vm/cointerp.c M spursistasrc/vm/cointerp.h M spursistasrc/vm/gcc3x-cointerp.c A spursistasrc/vm/variable_order A spursrc/vm/_variable_order M spursrc/vm/cogit.h M spursrc/vm/cogitARMv5.c M spursrc/vm/cogitIA32.c M spursrc/vm/cogitMIPSEL.c M spursrc/vm/cointerp.c M spursrc/vm/cointerp.h M spursrc/vm/cointerpmt.c M spursrc/vm/cointerpmt.h M spursrc/vm/gcc3x-cointerp.c M spursrc/vm/gcc3x-cointerpmt.c A spursrc/vm/variable_order M spurstack64src/vm/gcc3x-interp.c M spurstack64src/vm/interp.c M spurstack64src/vm/validImage.c M spurstacksrc/vm/gcc3x-interp.c M spurstacksrc/vm/interp.c M spurstacksrc/vm/validImage.c A src/vm/_variable_order M src/vm/cogit.h M src/vm/cogitARMv5.c M src/vm/cogitIA32.c M src/vm/cogitMIPSEL.c M src/vm/cointerp.c M src/vm/cointerp.h M src/vm/gcc3x-cointerp.c A src/vm/variable_order M stacksrc/vm/gcc3x-interp.c M stacksrc/vm/interp.c

Log Message: ----------- CogVM source as per VMMaker.oscog-eem.2984

Apple M1 ARMv8 good enough to recompile the Compiler package and update an 8 month old trunk image (October 29th 2020). The major weakness right now is that this uses the Apple cache flush code, not the JITted code, which as yet does not work. I'll investigate soon.

Abstract setting codeModified & conditionally sending makeCodeZoneWritable/ pthread_jit_write_protect_np into setCodeModified, invoked from the relevant places. Not all places can rely on flushICacheFrom:to: to flip back into executability. Do so explicitly in these places.

CogARMv8Compiler: provide two ways to detect features (determine cache parameters and atomic instruction availability), one via direct access to system registers, the other hard-wired, but to be done via sysctl(3).

Make provision for Apple M1 using pthread_jit_write_protect_np. Experiments show that DUAL_MAPPED_CODE_ZONE will not work, but pthread_jit_write_protect_np does. The zone is switched into writability explicitly in relevant entry points (see senders of ensureWritableCodeZone). The zone is switched into executability as part of the compiler class's flushICacheFrom:to:, and explicitly when flushICacheFrom:to: is either conditional or unused.

Have CogARMv8Compiler>>detectFeatures introduce a noop before accessing a system register so an illegal instruction can easily be distinguished from lack of execute permission.

Nuke dead code (addAllToYoungReferrers sqMakeMemoryNotExecutableFrom:To: etc). Make a few methods static that don't need to be exported but do need to be retained (ceCPICMiss:receiver: et al).

Make kosherYoungReferrers more robust so it works mid method generation.

Slang:

Do a better job eliding dead code by including casts in sends that are effect free and broadening the range of arithmetic and conditional sends that are considered for being effect free, and in argument passing. Slang fixes (noMask et al shouldn't use bit and directly).

Generate a variable order file of variables accessed by the JIT (potentially via VarBaseReg) to guide linkers in clustering these variables (close to the var base). Use the variable_order file in the Apple M1 build.