php-in-php: unlink() JIT via UnlinkJitHelper PHP — drop libc LLVM in JitUnlink.php

[PurHur]

Category

php-in-php · refs #1492

Problem

ext/standard/JitUnlink.php lowers JIT unlink() through libc unlink(2) LLVM. VM SSOT is VmFs::unlink() (VmFsUnlinkPure, #12194). JIT should compile the same PHP helper, not duplicate libc.

php-src reference

• php/php-src ext/standard/filestat.c — php_unlink

Repro (architectural)

grep "lookupFunction('unlink')" ext/standard/JitUnlink.php

Scope

Path	Work
ext/standard/UnlinkJitHelper.php	invokeArgv() → VmFs::unlink() + TriggerErrorJitHelper warning
lib/JIT/Builtin/StringUnlink.php	Thin ABI __phpc_jit_unlink bridge
ext/standard/JitUnlink.php	Thin wrapper like JitChmod.php
Tests	test/unit/UnlinkRuntimeShrinkTest.php

Done when

• No lookupFunction('unlink') in JitUnlink.php
• UnlinkJitHelper matches VM on temp file unlink
• ./script/ci-fast.sh --filter UnlinkRuntimeShrink green

Related

#12194 · #15458 · #1492

[PurHur]

claim: PHP Runtime → PHP — starting this run

[PurHur]

Merged via #15472.

Verification:

• grep "lookupFunction('unlink')" ext/standard/JitUnlink.php — no matches
• vendor/bin/phpunit --filter UnlinkRuntimeShrink — OK (4 tests)
• php script/check-selfhost-spine-coverage-sync.php — OK
• make bootstrap-selfhost-vm-driver-execute-probe — OK

C shrink: JIT unlink() no longer lowers through libc unlink(2); routes through UnlinkJitHelper → VmFs::unlink() (pairs VM #12194, chmod #15458 pattern).