[clang] [clang][bytecode] Add support for typeid pointers (PR #121251)

Sat Dec 28 05:11:48 PST 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-android` running on `sanitizer-buildbot-android` while building `clang` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/186/builds/5214

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
[3895/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVAsmPrinter.cpp.o
[3896/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/Sema.cpp.o
[3897/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVCallingConv.cpp.o
[3898/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaAttr.cpp.o
[3899/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVConstantPoolValue.cpp.o
[3900/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVCodeGenPrepare.cpp.o
[3901/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVExpandAtomicPseudoInsts.cpp.o
[3902/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVDeadRegisterDefinitions.cpp.o
[3903/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVMakeCompressible.cpp.o
[3904/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o
FAILED: tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build0/bin/clang++ -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/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/tools/clang/lib/AST -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/tools/clang/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -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 -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o -MF tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o.d -o tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o -c /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
  319 |   case Storage::Typeid:
      |   ^
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
  319 |   case Storage::Typeid:
      |   ^
      |   LLVM_FALLTHROUGH; 
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: note: insert 'break;' to avoid fall-through
  319 |   case Storage::Typeid:
      |   ^
      |   break; 
1 error generated.
[3905/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVExpandPseudoInsts.cpp.o
[3906/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVFrameLowering.cpp.o
[3907/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaAvailability.cpp.o
[3908/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVGatherScatterLowering.cpp.o
[3909/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaCast.cpp.o
[3910/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/PrimType.cpp.o
[3911/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Program.cpp.o
[3912/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/MemberPointer.cpp.o
[3913/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/State.cpp.o
[3914/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTContext.cpp.o
[3915/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/EvalEmitter.cpp.o
[3916/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ExprConstant.cpp.o
[3917/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Interp.cpp.o
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild

@@@STEP_FAILURE@@@
Step 8 (bootstrap clang) failure: bootstrap clang (failure)
...
[3895/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVAsmPrinter.cpp.o
[3896/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/Sema.cpp.o
[3897/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVCallingConv.cpp.o
[3898/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaAttr.cpp.o
[3899/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVConstantPoolValue.cpp.o
[3900/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVCodeGenPrepare.cpp.o
[3901/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVExpandAtomicPseudoInsts.cpp.o
[3902/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVDeadRegisterDefinitions.cpp.o
[3903/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVMakeCompressible.cpp.o
[3904/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o
FAILED: tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build0/bin/clang++ -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/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/tools/clang/lib/AST -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/tools/clang/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -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 -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o -MF tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o.d -o tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Pointer.cpp.o -c /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
  319 |   case Storage::Typeid:
      |   ^
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
  319 |   case Storage::Typeid:
      |   ^
      |   LLVM_FALLTHROUGH; 
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/clang/lib/AST/ByteCode/Pointer.cpp:319:3: note: insert 'break;' to avoid fall-through
  319 |   case Storage::Typeid:
      |   ^
      |   break; 
1 error generated.
[3905/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVExpandPseudoInsts.cpp.o
[3906/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVFrameLowering.cpp.o
[3907/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaAvailability.cpp.o
[3908/5341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVGatherScatterLowering.cpp.o
[3909/5341] Building CXX object tools/clang/lib/Sema/CMakeFiles/obj.clangSema.dir/SemaCast.cpp.o
[3910/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/PrimType.cpp.o
[3911/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Program.cpp.o
[3912/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/MemberPointer.cpp.o
[3913/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/State.cpp.o
[3914/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTContext.cpp.o
[3915/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/EvalEmitter.cpp.o
[3916/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ExprConstant.cpp.o
[3917/5341] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ByteCode/Interp.cpp.o
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild
program finished with exit code 2
elapsedTime=207.206368

```

</details>

https://github.com/llvm/llvm-project/pull/121251