[clang] [clang][deps] Implement efficient in-process `ModuleCache` (PR #129751)

LLVM Continuous Integration via cfe-commits cfe-commits at lists.llvm.org
Tue Mar 18 14:05:05 PDT 2025 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `cross-project-tests-sie-ubuntu` running on `doug-worker-1a` while building `clang` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/181/builds/15783

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
46.208 [1887/8/3229] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/DylibVerifier.cpp.o
46.217 [1886/8/3230] Linking CXX static library lib/libclangIndexSerialization.a
46.243 [1885/8/3231] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/DirectoryScanner.cpp.o
46.272 [1884/8/3232] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/FileList.cpp.o
46.280 [1883/8/3233] Building CXX object tools/clang/lib/Index/CMakeFiles/obj.clangIndex.dir/IndexingContext.cpp.o
46.303 [1882/8/3234] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/HeaderFile.cpp.o
46.326 [1881/8/3235] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/Library.cpp.o
46.456 [1880/8/3236] Building CXX object tools/clang/lib/Index/CMakeFiles/obj.clangIndex.dir/IndexingAction.cpp.o
46.470 [1879/8/3237] Building CXX object tools/clang/lib/StaticAnalyzer/Core/CMakeFiles/obj.clangStaticAnalyzerCore.dir/APSIntType.cpp.o
46.561 [1878/8/3238] Building CXX object tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningService.cpp.o
FAILED: tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningService.cpp.o 
/opt/ccache/bin/g++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/tools/clang/lib/Tooling/DependencyScanning -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/tools/clang/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningService.cpp.o -MF tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningService.cpp.o.d -o tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningService.cpp.o -c /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningService.cpp
In file included from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningService.cpp:9:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningService.h:117:22: error: declaration of ‘clang::tooling::dependencies::ModuleCacheMutexes clang::tooling::dependencies::DependencyScanningService::ModuleCacheMutexes’ changes meaning of ‘ModuleCacheMutexes’ [-fpermissive]
  117 |   ModuleCacheMutexes ModuleCacheMutexes;
      |                      ^~~~~~~~~~~~~~~~~~
In file included from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningService.h:13,
                 from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningService.cpp:9:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/InProcessModuleCache.h:20:8: note: ‘ModuleCacheMutexes’ declared here as ‘struct clang::tooling::dependencies::ModuleCacheMutexes’
   20 | struct ModuleCacheMutexes {
      |        ^~~~~~~~~~~~~~~~~~
46.810 [1878/7/3239] Building CXX object tools/clang/lib/Index/CMakeFiles/obj.clangIndex.dir/IndexTypeSourceInfo.cpp.o
47.154 [1878/6/3240] Building CXX object tools/clang/lib/StaticAnalyzer/Core/CMakeFiles/obj.clangStaticAnalyzerCore.dir/AnalysisManager.cpp.o
47.184 [1878/5/3241] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/Visitor.cpp.o
47.271 [1878/4/3242] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/Frontend.cpp.o
54.221 [1878/3/3243] Building CXX object tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningTool.cpp.o
FAILED: tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningTool.cpp.o 
/opt/ccache/bin/g++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/tools/clang/lib/Tooling/DependencyScanning -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/tools/clang/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningTool.cpp.o -MF tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningTool.cpp.o.d -o tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningTool.cpp.o -c /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningTool.cpp
In file included from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningTool.h:12,
                 from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningTool.cpp:9:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningService.h:117:22: error: declaration of ‘clang::tooling::dependencies::ModuleCacheMutexes clang::tooling::dependencies::DependencyScanningService::ModuleCacheMutexes’ changes meaning of ‘ModuleCacheMutexes’ [-fpermissive]
  117 |   ModuleCacheMutexes ModuleCacheMutexes;
      |                      ^~~~~~~~~~~~~~~~~~
In file included from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningService.h:13,
                 from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningTool.h:12,
                 from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningTool.cpp:9:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/InProcessModuleCache.h:20:8: note: ‘ModuleCacheMutexes’ declared here as ‘struct clang::tooling::dependencies::ModuleCacheMutexes’
   20 | struct ModuleCacheMutexes {
      |        ^~~~~~~~~~~~~~~~~~
55.407 [1878/2/3244] Building CXX object tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/ModuleDepCollector.cpp.o
FAILED: tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/ModuleDepCollector.cpp.o 
/opt/ccache/bin/g++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/tools/clang/lib/Tooling/DependencyScanning -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/tools/clang/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/build/include -I/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/ModuleDepCollector.cpp.o -MF tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/ModuleDepCollector.cpp.o.d -o tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/ModuleDepCollector.cpp.o -c /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp
In file included from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/ModuleDepCollector.h:20,
                 from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp:9:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningService.h:117:22: error: declaration of ‘clang::tooling::dependencies::ModuleCacheMutexes clang::tooling::dependencies::DependencyScanningService::ModuleCacheMutexes’ changes meaning of ‘ModuleCacheMutexes’ [-fpermissive]
  117 |   ModuleCacheMutexes ModuleCacheMutexes;
      |                      ^~~~~~~~~~~~~~~~~~
In file included from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningService.h:13,
                 from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/clang/include/clang/Tooling/DependencyScanning/ModuleDepCollector.h:20,

```

</details>

https://github.com/llvm/llvm-project/pull/129751

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