[llvm] [llvm][dwarfdump] Add --child-tags option to filter by DWARF tags (PR #165720)

Tue Nov 4 03:40:59 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-amdgpu-runtime-2` running on `rocm-worker-hw-02` while building `llvm` at step 5 "compile-openmp".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/10/builds/16635

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

```
Step 5 (compile-openmp) failure: build (failure)
...
44.110 [52/38/4685] Linking CXX executable bin/llvm-readobj
44.122 [51/38/4686] Generating ../../bin/llvm-readelf
44.163 [51/37/4687] Linking CXX executable bin/llvm-dwp
44.484 [51/36/4688] Building CXX object tools/llvm-cfi-verify/CMakeFiles/llvm-cfi-verify.dir/llvm-cfi-verify.cpp.o
44.495 [50/36/4689] Building CXX object tools/llvm-gsymutil/CMakeFiles/llvm-gsymutil.dir/llvm-gsymutil.cpp.o
44.559 [49/36/4690] Linking CXX executable bin/llvm-cfi-verify
44.616 [49/35/4691] Linking CXX executable bin/llvm-gsymutil
44.714 [49/34/4692] Building CXX object tools/lld/MachO/CMakeFiles/lldMachO.dir/SyntheticSections.cpp.o
44.911 [49/33/4693] Building CXX object tools/llvm-dwarfdump/CMakeFiles/llvm-dwarfdump.dir/llvm-dwarfdump.cpp.o
44.969 [48/33/4694] Linking CXX executable bin/llvm-dwarfdump
FAILED: bin/llvm-dwarfdump 
: && /usr/bin/c++ -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-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 -O3 -DNDEBUG -Wl,-rpath-link,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/./lib  -Wl,--gc-sections tools/llvm-dwarfdump/CMakeFiles/llvm-dwarfdump.dir/SectionSizes.cpp.o tools/llvm-dwarfdump/CMakeFiles/llvm-dwarfdump.dir/Statistics.cpp.o tools/llvm-dwarfdump/CMakeFiles/llvm-dwarfdump.dir/llvm-dwarfdump.cpp.o -o bin/llvm-dwarfdump  -Wl,-rpath,"\$ORIGIN/../lib:/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/lib:"  lib/libLLVMX86Desc.so.22.0git  lib/libLLVMAMDGPUDesc.so.22.0git  lib/libLLVMX86Info.so.22.0git  lib/libLLVMAMDGPUInfo.so.22.0git  lib/libLLVMDebugInfoDWARF.so.22.0git  lib/libLLVMObject.so.22.0git  lib/libLLVMMC.so.22.0git  lib/libLLVMDebugInfoDWARFLowLevel.so.22.0git  lib/libLLVMTargetParser.so.22.0git  lib/libLLVMSupport.so.22.0git  -Wl,-rpath-link,/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/lib && :
/usr/bin/ld: tools/llvm-dwarfdump/CMakeFiles/llvm-dwarfdump.dir/llvm-dwarfdump.cpp.o: undefined reference to symbol '_ZN4llvm5dwarf6getTagENS_9StringRefE'
/usr/bin/ld: /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/./lib/libLLVMBinaryFormat.so.22.0git: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
44.974 [48/32/4695] Building CXX object tools/lld/ELF/CMakeFiles/lldELF.dir/InputSection.cpp.o
45.123 [48/31/4696] Building CXX object tools/llvm-profgen/CMakeFiles/llvm-profgen.dir/llvm-profgen.cpp.o
45.294 [48/30/4697] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/ELFDump.cpp.o
45.705 [48/29/4698] Building CXX object tools/lld/MachO/CMakeFiles/lldMachO.dir/DriverUtils.cpp.o
45.721 [48/28/4699] Building CXX object tools/llvm-profgen/CMakeFiles/llvm-profgen.dir/MissingFrameInferrer.cpp.o
45.778 [48/27/4700] Building CXX object tools/dsymutil/CMakeFiles/dsymutil.dir/MachOUtils.cpp.o
45.836 [48/26/4701] Building CXX object tools/llvm-rtdyld/CMakeFiles/llvm-rtdyld.dir/llvm-rtdyld.cpp.o
45.900 [48/25/4702] Linking CXX shared library lib/libclang-cpp.so.22.0git
46.038 [48/24/4703] Building CXX object tools/lld/MachO/CMakeFiles/lldMachO.dir/LTO.cpp.o
46.315 [48/23/4704] Building CXX object tools/llvm-dwarfutil/CMakeFiles/llvm-dwarfutil.dir/DebugInfoLinker.cpp.o
46.477 [48/22/4705] Building CXX object tools/llvm-profgen/CMakeFiles/llvm-profgen.dir/CSPreInliner.cpp.o
46.570 [48/21/4706] Building CXX object tools/sancov/CMakeFiles/sancov.dir/sancov.cpp.o
46.575 [48/20/4707] Building CXX object tools/lld/COFF/CMakeFiles/lldCOFF.dir/SymbolTable.cpp.o
46.606 [48/19/4708] Building CXX object tools/llvm-nm/CMakeFiles/llvm-nm.dir/llvm-nm.cpp.o
46.617 [48/18/4709] Building CXX object tools/lld/ELF/CMakeFiles/lldELF.dir/Relocations.cpp.o
47.135 [48/17/4710] Building CXX object tools/dsymutil/CMakeFiles/dsymutil.dir/dsymutil.cpp.o
47.238 [48/16/4711] Building CXX object tools/llvm-dwarfutil/CMakeFiles/llvm-dwarfutil.dir/llvm-dwarfutil.cpp.o
47.372 [48/15/4712] Building CXX object tools/lld/ELF/CMakeFiles/lldELF.dir/Writer.cpp.o
47.828 [48/14/4713] Building CXX object tools/dsymutil/CMakeFiles/dsymutil.dir/DwarfLinkerForBinary.cpp.o
47.967 [48/13/4714] Building CXX object tools/lld/COFF/CMakeFiles/lldCOFF.dir/InputFiles.cpp.o
48.261 [48/12/4715] Building CXX object tools/llvm-profgen/CMakeFiles/llvm-profgen.dir/PerfReader.cpp.o
48.857 [48/11/4716] Building CXX object tools/llvm-profgen/CMakeFiles/llvm-profgen.dir/ProfileGenerator.cpp.o
49.014 [48/10/4717] Building CXX object tools/lld/MachO/CMakeFiles/lldMachO.dir/InputFiles.cpp.o
49.025 [48/9/4718] Building CXX object tools/lld/MachO/CMakeFiles/lldMachO.dir/Driver.cpp.o
49.158 [48/8/4719] Building CXX object tools/llvm-profgen/CMakeFiles/llvm-profgen.dir/ProfiledBinary.cpp.o
49.248 [48/7/4720] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/MachODump.cpp.o
50.467 [48/6/4721] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/llvm-objdump.cpp.o
51.439 [48/5/4722] Building CXX object tools/clang/tools/clang-repl/CMakeFiles/clang-repl.dir/ClangRepl.cpp.o
51.488 [48/4/4723] Building CXX object tools/lld/ELF/CMakeFiles/lldELF.dir/InputFiles.cpp.o
53.153 [48/3/4724] Building CXX object tools/lld/ELF/CMakeFiles/lldELF.dir/SyntheticSections.cpp.o
53.219 [48/2/4725] Building CXX object tools/lld/ELF/CMakeFiles/lldELF.dir/Driver.cpp.o
54.411 [48/1/4726] Building CXX object tools/llvm-jitlink/CMakeFiles/llvm-jitlink.dir/llvm-jitlink.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/165720