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

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Tue Apr 15 12:26:20 PDT 2025 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `clang,llvm` at step 6 "build-stage1-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/10911

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

```
Step 6 (build-stage1-unified-tree) failure: build (failure)
...
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~~~~~~~~~
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h: In member function ‘std::vector<llvm::InstrProfValueSiteRecord>& llvm::InstrProfRecord::getOrCreateValueSitesForKind(uint32_t)’:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h:977:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~~~~~~~~~
146.961 [3659/752/2141] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ManagedStatic.cpp.o
146.976 [3659/751/2142] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/CodeGenDAGPatterns.cpp.o
146.985 [3659/750/2143] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineSSAContext.cpp.o
146.987 [3659/749/2144] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o
FAILED: unittests/Support/CMakeFiles/SupportTests.dir/ProgramStackTest.cpp.o 
ccache /usr/lib64/ccache/c++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/unittests/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/unittests/Support -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/third-party/unittest/googletest/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/third-party/unittest/googlemock/include -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-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -Wno-dangling-else -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -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/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp: In member function ‘virtual void ProgramStackTest_runOnNewStack_Test::TestBody()’:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp:33:55: error: call of overloaded ‘runOnNewStack(int, llvm::function_ref<void(int&)>, int&)’ is ambiguous
   runOnNewStack(0, function_ref<void(int &)>(func2), A);
                                                       ^
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/unittests/Support/ProgramStackTest.cpp:9:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/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&}]’
 R runOnNewStack(unsigned StackSize, function_ref<R(Ts...)> Fn, Ts &&...Args) {
   ^~~~~~~~~~~~~
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/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&}]’
 void runOnNewStack(unsigned StackSize, function_ref<void(Ts...)> Fn,
      ^~~~~~~~~~~~~
146.990 [3659/748/2145] Building CXX object lib/ProfileData/Coverage/CMakeFiles/LLVMCoverage.dir/CoverageMappingWriter.cpp.o
In file included from /usr/include/c++/8/cassert:44,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h:39,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h:27,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h:19,
                 from /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/ProfileData/Coverage/CoverageMappingWriter.cpp:14:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h: In member function ‘llvm::ArrayRef<llvm::InstrProfValueSiteRecord> llvm::InstrProfRecord::getValueSitesForKind(uint32_t) const’:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h:968:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~~~~~~~~~
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h: In member function ‘std::vector<llvm::InstrProfValueSiteRecord>& llvm::InstrProfRecord::getOrCreateValueSitesForKind(uint32_t)’:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/ProfileData/InstrProf.h:977:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~~~~~~~~~
147.050 [3659/747/2146] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/Function.cpp.o
147.059 [3659/746/2147] Linking CXX static library lib/libLLVMTargetParser.a
147.065 [3659/745/2148] Building CXX object lib/Linker/CMakeFiles/LLVMLinker.dir/LinkModules.cpp.o
147.072 [3659/744/2149] Building CXX object lib/DebugInfo/Symbolize/CMakeFiles/LLVMSymbolize.dir/SymbolizableObjectFile.cpp.o
147.082 [3659/743/2150] Building CXX object lib/DebugInfo/DWARF/CMakeFiles/LLVMDebugInfoDWARF.dir/DWARFDebugLine.cpp.o
147.094 [3659/742/2151] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DJBTest.cpp.o
147.118 [3659/741/2152] Building CXX object unittests/Remarks/CMakeFiles/RemarksTests.dir/RemarksStrTabParsingTest.cpp.o
147.123 [3659/740/2153] Building CXX object lib/MC/CMakeFiles/LLVMMC.dir/WinCOFFObjectWriter.cpp.o
147.153 [3659/739/2154] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/DebugTest.cpp.o
147.162 [3659/738/2155] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/ToolOutputFileTest.cpp.o
147.170 [3659/737/2156] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/LoopUnrollAnalyzer.cpp.o
147.173 [3659/736/2157] Building CXX object lib/CGData/CMakeFiles/LLVMCGData.dir/StableFunctionMap.cpp.o

```

</details>

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

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