[compiler-rt] [llvm] [ctxprof] Capture sampling info for context roots (PR #131201)

Fri Mar 14 21:19:28 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-x86_64-debian-dylib` running on `gribozavr4` while building `compiler-rt,llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/60/builds/22122

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
15.381 [2894/86/4233] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/minidump2yaml.cpp.o
15.381 [2894/85/4234] Building WindresOpts.inc...
15.382 [2894/84/4235] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/offload2yaml.cpp.o
15.383 [2894/83/4236] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/xcoff2yaml.cpp.o
15.383 [2894/82/4237] Building Opts.inc...
15.385 [2894/81/4238] Building StripOpts.inc...
15.389 [2894/80/4239] Building CXX object tools/yaml2obj/CMakeFiles/yaml2obj.dir/yaml2obj.cpp.o
15.391 [2894/79/4240] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/wasm2yaml.cpp.o
15.395 [2894/78/4241] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/VLASizeChecker.cpp.o
15.407 [2894/77/4242] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/ElimAvailExtern.cpp.o
FAILED: lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/ElimAvailExtern.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /usr/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/b/1/llvm-x86_64-debian-dylib/build/lib/Transforms/IPO -I/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/lib/Transforms/IPO -I/b/1/llvm-x86_64-debian-dylib/build/include -I/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/ElimAvailExtern.cpp.o -MF lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/ElimAvailExtern.cpp.o.d -o lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/ElimAvailExtern.cpp.o -c /b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/lib/Transforms/IPO/ElimAvailExtern.cpp
In file included from /b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/lib/Transforms/IPO/ElimAvailExtern.cpp:17:
In file included from /b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/Analysis/CtxProfAnalysis.h:17:
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/ProfileData/PGOCtxProfReader.h:109:3: warning: explicitly defaulted default constructor is implicitly deleted [-Wdefaulted-function-deleted]
  PGOCtxProfContext() = default;
  ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/ProfileData/PGOCtxProfReader.h:95:33: note: default constructor of 'PGOCtxProfContext' is implicitly deleted because field 'RootEntryCount' of const-qualified type 'const std::optional<uint64_t>' (aka 'const optional<unsigned long>') would not be initialized
  const std::optional<uint64_t> RootEntryCount;
                                ^
In file included from /b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/lib/Transforms/IPO/ElimAvailExtern.cpp:17:
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/Analysis/CtxProfAnalysis.h:33:5: error: call to implicitly-deleted default constructor of 'llvm::PGOCtxProfContext'
    FunctionInfo(StringRef Name) : Name(Name) {}
    ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/ProfileData/PGOCtxProfReader.h:109:3: note: explicitly defaulted function was implicitly deleted here
  PGOCtxProfContext() = default;
  ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/llvm/include/llvm/ProfileData/PGOCtxProfReader.h:95:33: note: default constructor of 'PGOCtxProfContext' is implicitly deleted because field 'RootEntryCount' of const-qualified type 'const std::optional<uint64_t>' (aka 'const optional<unsigned long>') would not be initialized
  const std::optional<uint64_t> RootEntryCount;
                                ^
1 warning and 1 error generated.
15.413 [2894/76/4243] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/WebKit/ForwardDeclChecker.cpp.o
15.414 [2894/75/4244] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/WebKit/RawPtrRefLocalVarsChecker.cpp.o
15.425 [2894/74/4245] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/WebKit/RetainPtrCtorAdoptChecker.cpp.o
15.433 [2894/73/4246] Building CXX object tools/clang/lib/StaticAnalyzer/Frontend/CMakeFiles/obj.clangStaticAnalyzerFrontend.dir/AnalyzerHelpFlags.cpp.o
15.466 [2894/72/4247] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/WebKit/RawPtrRefMemberChecker.cpp.o
15.475 [2894/71/4248] Building CXX object tools/clang/lib/StaticAnalyzer/Frontend/CMakeFiles/obj.clangStaticAnalyzerFrontend.dir/AnalysisConsumer.cpp.o
15.479 [2894/70/4249] Linking CXX executable bin/llvm-jitlink-executor
15.511 [2894/69/4250] Building CXX object tools/clang/lib/StaticAnalyzer/Frontend/CMakeFiles/obj.clangStaticAnalyzerFrontend.dir/ModelInjector.cpp.o
15.518 [2894/68/4251] Building CXX object tools/clang/tools/extra/clang-include-fixer/plugin/CMakeFiles/obj.clangIncludeFixerPlugin.dir/IncludeFixerPlugin.cpp.o
15.581 [2894/67/4252] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/ObjCMemberwiseInitializer.cpp.o
15.585 [2894/66/4253] Building CXX object tools/clang/tools/clang-fuzzer/handle-cxx/CMakeFiles/obj.clangHandleCXX.dir/handle_cxx.cpp.o
15.618 [2894/65/4254] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/DefineOutline.cpp.o
15.618 [2894/64/4255] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/RawStringLiteral.cpp.o
15.623 [2894/63/4256] Building CXX object tools/clang/lib/Interpreter/CMakeFiles/obj.clangInterpreter.dir/CodeCompletion.cpp.o
15.632 [2894/62/4257] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/DumpAST.cpp.o
15.633 [2894/61/4258] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/SwapIfBranches.cpp.o
15.636 [2894/60/4259] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/AnnotateHighlightings.cpp.o
15.641 [2894/59/4260] Building CXX object tools/clang/tools/extra/clangd/refactor/tweaks/CMakeFiles/obj.clangDaemonTweaks.dir/SpecialMembers.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/131201