Stdlib AOT: link file_get_contents() for user-script standalone (#9308)

[PurHur]

Summary

• Register StringFileGetContents / StringReadfile in Context::ensureMinimalUserStandaloneBodies() so user-script AOT no longer fails link with undefined reference to __compiler_file_get_contents
• Save/restore LLVM insertion block during bridge emit (same pattern as StreamReadRuntime)
• Restore thin libc open/read bridge (StringFileGetContentsLibc) for minimal standalone AOT where Type/String_.php defers nested PHP JIT (Release v1.1.0: fix examples 000–009 AOT smoke (exit 139 on 000-HelloWorld phpc build) #13571, php-in-php: __compiler_file_get_contents JIT via FileGetContentsJitHelper PHP — drop open/read LLVM (#1492) #15309)

php-src reference

• ext/standard/streamsfuncs.c — php_stream_copy_to_mem

Verification

source script/php-env.sh
unset PHP_COMPILER_AOT_USER_SCRIPT

php bin/compile.php -o /tmp/fgc_aot - <<'PHP'
<?php
$path = 'test/compliance/cases/stdlib/readfile_fixture/data.txt';
echo file_get_contents($path);
PHP
/tmp/fgc_aot
# hello readfile

vendor/bin/phpunit test/compliance/JITTest.php --filter file_get_contents
# OK (9 tests)

vendor/bin/phpunit test/unit/FileGetContentsRuntimeShrinkTest.php
# OK (3 tests)

Known gaps (not merge-ready)

• vendor/bin/phpunit test/aot/AotTest.php --filter file_get_contents — links but PHPUnit proc_open run aborts (munmap_chunk(): invalid pointer); direct php bin/compile.php path is green
• file_get_contents_offset AOT fixture — compile SIGSEGV; needs __compiler_file_put_contents + offset slice
• readfile AOT — still returns 0; needs StringReadfileLibc parity

Closes #9308 when AOT fixtures above are green.

Made with Cursor

[PurHur]

Additional verification (2026-07-06)

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit test/aot/AotTest.php --filter "testCases with data set \"file_get_contents\""'
# OK (1 test, 5 assertions)

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit test/unit/FileGetContentsRuntimeShrinkTest.php'
# OK (3 tests, 9 assertions)

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit test/compliance/JITTest.php --filter file_get_contents'
# OK (9 tests, 9 assertions)

Follow-up commit: __mm__free for libc chunk buffer + REQUEST_METHOD= in AOT PHPT (prevents AotTest default GET env from tripping munmap on web superglobal refresh).

Known remaining gap: file_get_contents_offset AOT fixture still compile-SIGSEGV (needs file_put_contents standalone link).