php-in-php: GethostbyaddrRuntime NestedJIT → JitVmHelperLink::ensureCompiled (#1492)

[PurHur]

Category

php-in-php · runtime-shrink (#1492, peer #22355 CheckdnsrrRuntime / #22313 PasswordRandomBytesRuntime)

Problem

lib/JIT/Builtin/GethostbyaddrRuntime.php still hand-rolls NestedJitCompileScope::run + parseAndCompile + new JIT() for GethostbyaddrJitHelper.php. Peer runtimes route helper compile through JitVmHelperLink::ensureCompiled for consistent user-script env clearing, insert-block restore, and helper-runtime cache.

php-src reference

• php/php-src ext/standard/dns.c — PHP_FUNCTION(gethostbyaddr) (semantics unchanged; compile-path only)

PHP implementation target

• lib/JIT/Builtin/GethostbyaddrRuntime.php — replace ensureJitHelperCompiled body with JitVmHelperLink::ensureCompiled; use lookupCompiled; drop unused use NestedJitCompileScope / use JIT
• test/unit/GethostbyaddrRuntimeShrinkTest.php — guard JitVmHelperLink::ensureCompiled, no hand-rolled NestedJitCompileScope::run / parseAndCompile / new JIT(

Repro

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit test/unit/GethostbyaddrRuntimeShrinkTest.php'
make bootstrap-selfhost-vm-driver-execute-probe

Done when

• GethostbyaddrRuntime uses JitVmHelperLink::ensureCompiled only
• Shrink unit test green
• make bootstrap-selfhost-vm-driver-execute-probe green
• PR body cites lines removed

Refs #1492, #9474, #22355, #22313

[PurHur]

claim: PHP Runtime → PHP — starting this run

Trust gates (pre-claim)

Gate	Result
bootstrap-selfhost-link (docker-exec)	OK /compiler/build/selfhost
php script/bootstrap-inventory.php --check	OK 6415/6415
./script/release-readiness.sh --json	user_release_ready: yes (mode=quick); north-star5-fast + vm-driver-probe ok
php bin/vm.php examples/000-HelloWorld/example.php	Hello World
make bootstrap-selfhost-helloworld	EXIT 0 (DEGRADED native-prelinked-sidecar emit; stdout Hello World)

Migrating GethostbyaddrRuntime NestedJIT hand-roll → JitVmHelperLink::ensureCompiled (peer #22355).

[PurHur]

Merged via #22375

Verification

• vendor/bin/phpunit test/unit/GethostbyaddrRuntimeShrinkTest.php → OK (6 tests)
• GethostbyaddrBuiltinTest + GethostbyaddrRuntimeStandaloneTest → OK (3 tests)
• make bootstrap-selfhost-vm-driver-execute-probe → OK

Shrink: GethostbyaddrRuntime.php 178→135 lines; hand-rolled NestedJIT → JitVmHelperLink::ensureCompiled (−56/+23 overall).