Simplify Out-Of-Process JIT case - #940
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vgvassilev merged 2 commits intoApr 26, 2026
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Out-of-process JIT needs `liborc_rt*.a` (fed to
`IncrementalExecutorBuilder::OrcRuntimePath`) and
`llvm-jitlink-executor`. Upstream's auto-discovery validates the
runtime path against `parent_path(D.Dir)`, which only matches when
`libclangCppInterOp.so` lives inside the LLVM install tree -- test
binaries under `<build>/unittests/...` trip the safety check.
Bundle both artifacts under `<libdir>/cppinterop-rt/` via a new
`FindLLVMOrcRuntime` cmake module and configure_file/install rules,
and hand the paths to `IncrementalExecutorBuilder` directly with a
no-op `UpdateOrcRuntimePathCB`. The locations are baked at build
time (`CPPINTEROP_RUNTIME_{BUILD,INSTALL}_DIR`); when the runtime
parts are missing the OOP path falls back to in-process JIT with a
logged warning. Relocatable-install support (sysadmin-overridable
runtime dir, `dladdr`-based self-DSO probe) is a separate follow-up
PR layered on top of this baked probe.
Drops the now-unused `LLVM_BUILT_WITH_OOP_JIT` cmake option and the
`LLVM_BINARY_LIB_DIR` define (its only consumer was the old
hand-built executor path); README, InstallationAndUsage.rst, and
DevelopersDocumentation.rst are updated to describe auto-detection.
Activates the bundling design from `[jit] Self-contain the OOP-JIT runtime in CppInterOp's distribution.`: - `Build_LLVM/action.yml`: for non-cling rows with `clang-runtime >= 22`, set `LLVM_ENABLE_PROJECTS="clang;compiler-rt"` and ninja `llvm-jitlink-executor` plus every `orc_rt*` target ninja exposes (other compiler-rt components are turned off so build cost is bounded to the ORC runtime). The matrix `llvm_enable_projects` override is no longer load-bearing: the projects list is now picked entirely from `NEED_OOP`. - `Build_and_Test_CppInterOp/action.yml`: drop `-DLLVM_BUILT_WITH_OOP_JIT`; CppInterOp auto-detects via `find_package(LLVMOrcRuntime)`. The Valgrind suppression file selection moves from `matrix.oop-jit` to `clang-runtime >= 22`, matching the auto-detect condition that now drives OOP at runtime. Adds two post-build assertions: (a) the typed-test fixtures registered match the source-side gate -- the `OutOfProcessJIT` fixture must NOT be present on `clang-runtime <= 21`, catching accidental regressions of the `LLVM_VERSION_MAJOR > 21` guard in `unittests/CppInterOp/Utils.h`; (b) an install-layout smoke test that installs into a scratch prefix and asserts `<libdir>/cppinterop-rt/liborc_rt.a` is shipped and `llvm-jitlink-executor` retains its executable bit, catching install(FILES/PROGRAMS) destination/mode regressions. - `main.yml`: drop the `-oop` cache-key suffix and the `oop-jit` matrix dimension along with its rows. `osx26-arm-clang-llvm22-oop` was a duplicate of `osx26-arm-clang-llvm22` once the OOP knob retired; `ubu24-x86-gcc12-llvm22-oop-vg` was unique only for its Valgrind axis and is renamed to `ubu24-x86-gcc12-llvm22-vg`. OOP and in-process rows on the same axes now share a cache slot; existing entries match the new key but need a refresh to gain the runtime parts -- transitional rows fall back to in-process JIT with a logged warning.
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #940 +/- ##
==========================================
+ Coverage 80.87% 81.67% +0.79%
==========================================
Files 15 15
Lines 4707 4743 +36
==========================================
+ Hits 3807 3874 +67
+ Misses 900 869 -31
... and 1 file with indirect coverage changes
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| #if defined(_WIN32) || !defined(LLVM_BUILT_WITH_OOP_JIT) | ||
| outOfProcess = false; | ||
| #else | ||
| #if LLVM_VERSION_MAJOR > 21 && !defined(_WIN32) |
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warning: no header providing "LLVM_VERSION_MAJOR" is directly included [misc-include-cleaner]
lib/CppInterOp/CppInterOpInterpreter.h:38:
+ #include <llvm/Config/llvm-config.h>
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The failure seems a glitch. Test coming in the next pr. |
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The asan-ubsan CI row started exercising the OOP-JIT path after `[ci] Build the bundled OOP-JIT runtime in non-cling LLVM>=22 caches.` (compiler-research#940) made OOP run by default for every llvm22+ row. `EnumReflection_GetEnums` then trips the assertion at `llvm/lib/ExecutionEngine/Orc/Core.cpp:2800`: Resolving symbol with incorrect flags ASan instruments globals with extra metadata that changes the `JITSymbolFlags` declared in the host process; when the EPC-based out-of-process executor reports back the resolved flags, they don't match. The in-process JIT path doesn't compare across an IPC boundary so it's unaffected, and other OOP tests don't define the kinds of common symbols that hit the resolution path. Skip just this test under OOP-when-sanitized rather than disabling the OOP fixture wholesale -- the remaining OOP tests on the asan-ubsan row keep running. Likely upstream LLVM bug; can be removed once the EPC symbol-flag tracking is fixed.
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The asan-ubsan CI row started exercising the OOP-JIT path after `[ci] Build the bundled OOP-JIT runtime in non-cling LLVM>=22 caches.` (compiler-research#940) made OOP run by default for every llvm22+ row. Two tests then trip the assertion at `llvm/lib/ExecutionEngine/Orc/Core.cpp:2800`: Resolving symbol with incorrect flags ASan instruments globals with extra metadata that changes the `JITSymbolFlags` declared in the host process; when the EPC-based out-of-process executor reports back the resolved flags, they don't match. The in-process JIT path doesn't compare across an IPC boundary so it's unaffected, and other OOP tests don't define the kinds of common symbols that hit the resolution path. Skip the failing tests under OOP-when-sanitized rather than disabling the OOP fixture wholesale -- the remaining OOP tests on the asan-ubsan row keep running: - `EnumReflection_GetEnums` - `FunctionReflection_InstantiateTemplateFunctionFromString` Likely upstream LLVM bug; can be removed once the EPC symbol-flag tracking is fixed.
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#942) * [jit] Add a layered probe chain for relocatable OOP runtime discovery. The bake-at-build-time install path from `[jit] Self-contain the OOP-JIT runtime in CppInterOp's distribution.` is fragile under relocation: an installed CppInterOp moved to a different prefix (rpm `--prefix`, conda relocation, AppImage) can't find the runtime parts because the macro holds the original `CMAKE_INSTALL_FULL_LIBDIR`. `configureBundledOOPRuntime` now probes a layered list, most-reliable first, before falling back to the baked path: 1. `$CPPINTEROP_RUNTIME_DIR` -- sysadmin override; trumps every other source so packagers can point CppInterOp at a runtime extracted to a separate location. 2. `<dir of libclangCppInterOp>/cppinterop-rt` -- self-DSO discovery via `dladdr` (POSIX). Works for any non-static link: if the `.so` moves, the runtime moves with it, no env-var needed. 3. `CPPINTEROP_RUNTIME_BUILD_DIR` -- in-tree test runs. 4. `CPPINTEROP_RUNTIME_INSTALL_DIR` -- baked install path; last resort when self-DSO discovery isn't available (Windows, or CppInterOp statically linked into a host binary). Windows has no self-DSO discovery yet -- a `GetModuleHandleEx` port can be added when Windows OOP support arrives. The clang resource directory (`CLANG_RESOURCE_DIR`) suffers the same bake-at-build-time-vs-relocation problem and would benefit from the same layering; left as follow-up. * [ci] Verify the OOP runtime probe chain via relocation + env-var. The layered probe chain in `configureBundledOOPRuntime` from `[jit] Add a layered probe chain for relocatable OOP runtime discovery.` adds two new lookup layers (`CPPINTEROP_RUNTIME_DIR` env-var override and `dladdr`-based self-DSO probe) that the existing in-tree test path doesn't exercise -- in-tree the baked `CPPINTEROP_RUNTIME_BUILD_DIR` probe wins first, so a regression in either new layer would be silent. After the install-layout assertion succeeds, move the install to a fresh prefix and re-run the OOP-tagged tests with `DYLD_LIBRARY_PATH`/`LD_LIBRARY_PATH` pointing at the moved tree: the `dladdr` probe must follow the relocated `.so` and find the runtime alongside it. Then stage the runtime parts at a third location, wipe the moved `cppinterop-rt/` subdir, and re-run with `CPPINTEROP_RUNTIME_DIR` set to the staged copy: only the env-var probe can win. Both runs assert that the `[CreateClangInterpreter]: --use-oop-jit requested but the bundled OOP runtime ... is missing` fallback warning does NOT appear in the test output. Negative-control verified locally -- with all probe locations wiped the warning does fire, confirming the assertion isn't dead. Filter is `CppInterOpTest/OutOfProcessJIT.Jit_StreamRedirectJIT`, the only OOP-tagged test that calls `CreateInterpreter()` before its skip check; the test itself fails with a preexisting `stdio.h not found` issue in the OOP child interpreter, which is orthogonal to the probe chain and doesn't trip the bundling warning. * [test] Skip OOP+sanitizer-incompatible reflection tests. The asan-ubsan CI row started exercising the OOP-JIT path after `[ci] Build the bundled OOP-JIT runtime in non-cling LLVM>=22 caches.` (#940) made OOP run by default for every llvm22+ row. Two tests then trip the assertion at `llvm/lib/ExecutionEngine/Orc/Core.cpp:2800`: Resolving symbol with incorrect flags ASan instruments globals with extra metadata that changes the `JITSymbolFlags` declared in the host process; when the EPC-based out-of-process executor reports back the resolved flags, they don't match. The in-process JIT path doesn't compare across an IPC boundary so it's unaffected, and other OOP tests don't define the kinds of common symbols that hit the resolution path. Skip the failing tests under OOP-when-sanitized rather than disabling the OOP fixture wholesale -- the remaining OOP tests on the asan-ubsan row keep running: - `EnumReflection_GetEnums` - `FunctionReflection_InstantiateTemplateFunctionFromString` Likely upstream LLVM bug; can be removed once the EPC symbol-flag tracking is fixed.
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