[clang] [llvm] [llvm][clang] Allocate a new stack instead of spawning a new thread to get more stack space (PR #133173)

Tue Apr 15 13:01:12 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-expensive-checks-ubuntu` running on `as-builder-4` while building `clang,llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/187/builds/5424

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
...
7.008 [152/66/542] Building CXX object unittests/Target/AMDGPU/CMakeFiles/AMDGPUTests.dir/PALMetadata.cpp.o
7.017 [151/66/543] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/MemoryBufferRefTest.cpp.o
7.105 [150/66/544] Building CXX object unittests/Target/RISCV/CMakeFiles/RISCVTests.dir/MCInstrAnalysisTest.cpp.o
7.204 [149/66/545] Building CXX object unittests/Frontend/CMakeFiles/LLVMFrontendTests.dir/OpenMPContextTest.cpp.o
7.227 [148/66/546] Building CXX object unittests/DebugInfo/DWARF/CMakeFiles/DebugInfoDWARFTests.dir/DWARFDebugAbbrevTest.cpp.o
7.228 [147/66/547] Building CXX object unittests/Target/RISCV/CMakeFiles/RISCVTests.dir/RISCVInstrInfoTest.cpp.o
7.273 [146/66/548] Building CXX object unittests/Target/SPIRV/CMakeFiles/SPIRVTests.dir/SPIRVConvergenceRegionAnalysisTests.cpp.o
7.284 [145/66/549] Building CXX object unittests/DebugInfo/DWARF/CMakeFiles/DebugInfoDWARFTests.dir/DWARFDebugArangeSetTest.cpp.o
7.327 [144/66/550] Building CXX object unittests/Target/SPIRV/CMakeFiles/SPIRVTests.dir/SPIRVSortBlocksTests.cpp.o
7.334 [143/66/551] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o
FAILED: unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /usr/bin/c++ -DEXPENSIVE_CHECKS -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/unittests/Support -I/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/unittests/Support -I/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/include -I/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include -I/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/third-party/unittest/googletest/include -I/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/third-party/unittest/googlemock/include -U_GLIBCXX_DEBUG -Wno-misleading-indentation -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g  -Wno-dangling-else -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -gsplit-dwarf -Wno-suggest-override -std=c++17 -MD -MT unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o -MF unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o.d -o unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o -c /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp
/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp: In member function ‘virtual void ProgramStackTest_runOnNewStack_Test::TestBody()’:
/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp:33:16: error: call of overloaded ‘runOnNewStack(int, llvm::function_ref<void(int&)>, int&)’ is ambiguous
   33 |   runOnNewStack(0, function_ref<void(int &)>(func2), A);
      |   ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp:9:
/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/Support/ProgramStack.h:48:3: note: candidate: ‘R llvm::runOnNewStack(unsigned int, llvm::function_ref<Ret(Params ...)>, Ts&& ...) [with R = void; Ts = {int&}]’
   48 | R runOnNewStack(unsigned StackSize, function_ref<R(Ts...)> Fn, Ts &&...Args) {
      |   ^~~~~~~~~~~~~
/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/Support/ProgramStack.h:55:6: note: candidate: ‘void llvm::runOnNewStack(unsigned int, llvm::function_ref<void(Ts ...)>, Ts&& ...) [with Ts = {int&}]’
   55 | void runOnNewStack(unsigned StackSize, function_ref<void(Ts...)> Fn,
      |      ^~~~~~~~~~~~~
7.335 [143/65/552] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/OptimizedStructLayoutTest.cpp.o
7.351 [143/64/553] Building CXX object unittests/Target/SPIRV/CMakeFiles/SPIRVTests.dir/SPIRVPartialOrderingVisitorTests.cpp.o
7.353 [143/63/554] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/TrailingObjectsTest.cpp.o
7.364 [143/62/555] Building CXX object unittests/Target/SPIRV/CMakeFiles/SPIRVTests.dir/SPIRVAPITest.cpp.o
7.391 [143/61/556] Building CXX object unittests/DebugInfo/PDB/CMakeFiles/DebugInfoPDBTests.dir/StringTableBuilderTest.cpp.o
7.392 [143/60/557] Building CXX object unittests/CGData/CMakeFiles/CGDataTests.dir/StableFunctionMapTest.cpp.o
7.413 [143/59/558] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/SetOperationsTest.cpp.o
7.465 [143/58/559] Building CXX object unittests/Target/PowerPC/CMakeFiles/PowerPCTests.dir/AIXRelocModelTest.cpp.o
7.468 [143/57/560] Linking CXX executable unittests/SandboxIR/SandboxIRTests
7.523 [143/56/561] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CachePruningTest.cpp.o
7.590 [143/55/562] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/ConstantRangeListTest.cpp.o
7.627 [143/54/563] Building CXX object unittests/Analysis/CMakeFiles/AnalysisTests.dir/MLModelRunnerTest.cpp.o
7.677 [143/53/564] Building CXX object unittests/Object/CMakeFiles/ObjectTests.dir/SymbolicFileTest.cpp.o
7.977 [143/52/565] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/CrashRecoveryTest.cpp.o
8.045 [143/51/566] Building CXX object unittests/MC/CMakeFiles/MCTests.dir/DwarfLineTables.cpp.o
8.070 [143/50/567] Building CXX object unittests/DebugInfo/MSF/CMakeFiles/DebugInfoMSFTests.dir/MappedBlockStreamTest.cpp.o
8.279 [143/49/568] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/SourceMgrTest.cpp.o
8.388 [143/48/569] Linking CXX executable unittests/Debuginfod/DebuginfodTests
/usr/bin/ld.gold: warning: lib/libLLVMMCParser.a(MCAsmParserExtension.cpp.o): top level DIE is not DW_TAG_compile_unit or DW_TAG_type_unit
/usr/bin/ld.gold: warning: lib/libLLVMMC.a(MCSectionWasm.cpp.o): top level DIE is not DW_TAG_compile_unit or DW_TAG_type_unit
8.635 [143/47/570] Linking CXX executable unittests/DebugInfo/GSYM/DebugInfoGSYMTests
/usr/bin/ld.gold: warning: lib/libLLVMDebugInfoGSYM.a(LineTable.cpp.o): top level DIE is not DW_TAG_compile_unit or DW_TAG_type_unit
/usr/bin/ld.gold: warning: lib/libLLVMMCParser.a(MCAsmParserExtension.cpp.o): top level DIE is not DW_TAG_compile_unit or DW_TAG_type_unit
/usr/bin/ld.gold: warning: lib/libLLVMMC.a(MCSectionWasm.cpp.o): top level DIE is not DW_TAG_compile_unit or DW_TAG_type_unit
8.894 [143/46/571] Building CXX object unittests/DebugInfo/DWARF/CMakeFiles/DebugInfoDWARFTests.dir/DWARFDataExtractorTest.cpp.o
8.913 [143/45/572] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/LockFileManagerTest.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/133173