M2 spine: ob_* AOT runtime + JitOb scaffolds (North Star 2) - #1876
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…#1492) Add native output-buffer runtime (phpc_ob.c) and LLVM JitOb* lowering classes for self-host AOT link. Bundle four ob Jit* units in compiler_lib_spine_smoke (589/593 inventory). Register __phpc_ob_* externals for JIT modules. JIT call() for debug_backtrace/ob_* remains deferred (MCJIT runtime segfault on nested hashtables / ob stack — follow stream_context_create enablement). Closes #1492 (batch). Refs #1378, #118, #1419. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
phpc_ob.c,phpc_ob_storage.c) and link it fromlib/AOT/Linker.phpfor AOT/self-host binaries.JitObStart,JitObGetLevel,JitObGetClean,JitObEndFlush) and register__phpc_ob_*externals viaObOutput::registerExternals().compiler_lib_spine_smokebundle (+4 units) and sync North Star 2 footnotes to 589 / 593 inventory.JIT
call()fordebug_backtrace/ob_*remains deferred (MCJIT runtime segfault on this harness — same class of issue as pre-enablementstream_context_create/ nested frame hashtables in #1854). VM paths unchanged.Closes #1492
Test plan
php script/audit-stdlib-jit.php/php script/capability-matrix.phpcheck-wave3-roadmap-sync/check-selfhost-spine-count-sync(589/593)BootstrapSelfhostBundleTest(spine require_once count)BOOTSTRAP_LIB_SPINE_SMOKE=1 make bootstrap-selfhost-lib-spine-smoke(needs host LLVM 9 / 22.04-dev image)./script/ci-local.shfull gate on a machine with working MCJITMade with Cursor