[clang] [llvm] [clang] Use the VFS in `ModuleDependencyCollector` (PR #160944)

Mon Sep 29 09:53:43 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-m68k-linux-cross` running on `suse-gary-m68k-cross` while building `clang,llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/16765

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

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
...
[112/392] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/tweaks/TweakTesting.cpp.o
[113/392] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/tweaks/TweakTests.cpp.o
[114/392] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/TUSchedulerTests.cpp.o
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/clangd/unittests/TUSchedulerTests.cpp: In member function ‘virtual void clang::clangd::{anonymous}::TUSchedulerTests_PublishWithStalePreamble_Test::TestBody()::BlockPreambleThread::onPreambleAST(clang::clangd::PathRef, llvm::StringRef, clang::clangd::CapturedASTCtx, std::shared_ptr<const clang::include_cleaner::PragmaIncludes>)’:
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/clangd/unittests/TUSchedulerTests.cpp:1219:10: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wdangling-else]
 1219 |       if (BuildBefore)
      |          ^
[115/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Driver/ToolChainTest.cpp.o
[116/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/CloneDetectionTest.cpp.o
[117/392] Building CXX object tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/TransformerClangTidyCheckTest.cpp.o
FAILED: tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/TransformerClangTidyCheckTest.cpp.o 
/usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/tools/clang/tools/extra/unittests/clang-tidy -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/unittests/clang-tidy -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/unittests/clang-tidy/../../include-cleaner/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/tools/clang/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/clang-tidy -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/third-party/unittest/googletest/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/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-dangling-reference -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -O3 -DNDEBUG -std=c++17  -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -MD -MT tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/TransformerClangTidyCheckTest.cpp.o -MF tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/TransformerClangTidyCheckTest.cpp.o.d -o tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/TransformerClangTidyCheckTest.cpp.o -c /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/unittests/clang-tidy/TransformerClangTidyCheckTest.cpp
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
[118/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/StaticAnalyzer/BlockEntranceCallbackTest.cpp.o
[119/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/CFGMatchSwitchTest.cpp.o
[120/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DebugSupportTest.cpp.o
[121/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DeterminismTest.cpp.o
[122/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/LoggerTest.cpp.o
[123/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/MatchSwitchTest.cpp.o
[124/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/MultiVarConstantPropagationTest.cpp.o
[125/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/SmartPointerAccessorCachingTest.cpp.o
[126/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/StaticAnalyzer/APSIntTypeTest.cpp.o
[127/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/StaticAnalyzer/ConflictingEvalCallsTest.cpp.o
[128/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/StaticAnalyzer/CallEventTest.cpp.o
[129/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/ASTOpsTest.cpp.o
[130/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/RecordOpsTest.cpp.o
[131/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/WatchedLiteralsSolverTest.cpp.o
[132/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/TestingSupport.cpp.o
[133/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/TransferBranchTest.cpp.o
[134/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/CFGTest.cpp.o
[135/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/ChromiumCheckModelTest.cpp.o
[136/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/StaticAnalyzer/CallDescriptionTest.cpp.o
[137/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/SignAnalysisTest.cpp.o
[138/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/CFGDominatorTree.cpp.o
[139/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/StaticAnalyzer/BugReportInterestingnessTest.cpp.o
[140/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/CachedConstAccessorsLatticeTest.cpp.o
[141/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DataflowEnvironmentTest.cpp.o
[142/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/IntervalPartitionTest.cpp.o
[143/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/UncheckedOptionalAccessModelTest.cpp.o
[144/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/SimplifyConstraintsTest.cpp.o
[145/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/LifetimeSafetyTest.cpp.o
[146/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/TestingSupportTest.cpp.o
[147/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/SingleVarConstantPropagationTest.cpp.o
[148/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/ExprMutationAnalyzerTest.cpp.o
[149/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/TypeErasedDataflowAnalysisTest.cpp.o
[150/392] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/TransferTest.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/160944