[compiler-rt] [sanitizer] Print diagnostic if ptrace syscall fails (PR #151406)

Mon Aug 4 15:51:30 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `amdgpu-offload-rhel-8-cmake-build-only` running on `rocm-docker-rhel-8` while building `compiler-rt` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/204/builds/17749

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

```
Step 4 (annotate) failure: '../llvm-zorg/zorg/buildbot/builders/annotated/amdgpu-offload-cmake.py --jobs=32' (failure)
...
[8/117] Building LLVM bitcode Kernel.cpp-amdgpu.o
[9/117] Building LLVM bitcode Configuration.cpp-amdgpu.o
[10/117] Building include/OffloadInfo.inc...
[11/117] Building include/OffloadErrcodes.inc...
[12/97] Building generated/OffloadAPI.h.gen...
[13/97] Building generated/OffloadFuncs.inc.gen...
[14/96] Building generated/OffloadEntryPoints.inc.gen...
[15/96] Building generated/OffloadPrint.hpp.gen...
[16/96] Building generated/OffloadImplFuncDecls.inc.gen...
[17/96] Building CXX object compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o
FAILED: compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o 
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE_RPC_XDR_H=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/.. -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -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 -Wall -Wno-unused-parameter -O3 -DNDEBUG -std=c++17 -m64 -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fno-stack-protector -fno-sanitize=safe-stack -fvisibility=hidden -fno-lto -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -O3 -gline-tables-only -Wno-gnu -Wno-variadic-macros -Wno-c99-extensions -ftrivial-auto-var-init=pattern -nostdinc++ -Wno-format -fno-rtti -Wframe-larger-than=570 -Wglobal-constructors -MD -MT compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -MF compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o.d -o compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -c /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:429:5: error: use of undeclared identifier '_exit'
  429 |     _exit(-1);
      |     ^~~~~
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:435:5: error: use of undeclared identifier '_exit'
  435 |     _exit(0);
      |     ^~~~~
2 errors generated.
[18/96] Building LLVM bitcode Reduction.cpp-amdgpu.o
[19/96] Building CXX object compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o
FAILED: compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o 
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE_RPC_XDR_H=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/.. -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -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 -Wall -Wno-unused-parameter -O3 -DNDEBUG -std=c++17 -m64 -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fno-stack-protector -fno-sanitize=safe-stack -fvisibility=hidden -fno-lto -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -O3 -gline-tables-only -Wno-gnu -Wno-variadic-macros -Wno-c99-extensions -ftrivial-auto-var-init=pattern -nostdinc++ -Wno-format -fno-rtti -Wframe-larger-than=570 -Wglobal-constructors -DSANITIZER_SUPPORTS_WEAK_HOOKS=0 -MD -MT compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -MF compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o.d -o compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -c /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:429:5: error: use of undeclared identifier '_exit'
  429 |     _exit(-1);
      |     ^~~~~
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:435:5: error: use of undeclared identifier '_exit'
  435 |     _exit(0);
      |     ^~~~~
2 errors generated.
[20/96] Building LLVM bitcode Mapping.cpp-amdgpu.o
[21/96] Building LLVM bitcode Synchronization.cpp-amdgpu.o
[22/96] Generating OffloadImplFuncDecls.inc
[23/96] Generating OffloadPrint.hpp
[24/96] Generating OffloadAPI.h
[25/91] Building LLVM bitcode Misc.cpp-amdgpu.o
[26/91] Generating OffloadEntryPoints.inc
[27/90] Building LLVM bitcode State.cpp-amdgpu.o
[28/90] Linking CXX shared library /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/lib/libomptarget.so.22.0git
[29/90] Generating /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/compile_commands.json
[30/90] Building LLVM bitcode Workshare.cpp-amdgpu.o
[31/90] Building LLVM bitcode Parallelism.cpp-amdgpu.o
ninja: build stopped: subcommand failed.
FAILED: runtimes/runtimes-stamps/runtimes-build /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/runtimes/runtimes-stamps/runtimes-build 
cd /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/runtimes/runtimes-bins && /usr/bin/cmake --build .
ninja: build stopped: subcommand failed.
['ninja'] exited with return code 1.
The build step threw an exception...
Traceback (most recent call last):
Step 7 (build cmake config) failure: build cmake config (failure)
...
[8/117] Building LLVM bitcode Kernel.cpp-amdgpu.o
[9/117] Building LLVM bitcode Configuration.cpp-amdgpu.o
[10/117] Building include/OffloadInfo.inc...
[11/117] Building include/OffloadErrcodes.inc...
[12/97] Building generated/OffloadAPI.h.gen...
[13/97] Building generated/OffloadFuncs.inc.gen...
[14/96] Building generated/OffloadEntryPoints.inc.gen...
[15/96] Building generated/OffloadPrint.hpp.gen...
[16/96] Building generated/OffloadImplFuncDecls.inc.gen...
[17/96] Building CXX object compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o
FAILED: compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o 
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE_RPC_XDR_H=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/.. -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -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 -Wall -Wno-unused-parameter -O3 -DNDEBUG -std=c++17 -m64 -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fno-stack-protector -fno-sanitize=safe-stack -fvisibility=hidden -fno-lto -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -O3 -gline-tables-only -Wno-gnu -Wno-variadic-macros -Wno-c99-extensions -ftrivial-auto-var-init=pattern -nostdinc++ -Wno-format -fno-rtti -Wframe-larger-than=570 -Wglobal-constructors -MD -MT compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -MF compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o.d -o compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -c /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:429:5: error: use of undeclared identifier '_exit'
  429 |     _exit(-1);
      |     ^~~~~
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:435:5: error: use of undeclared identifier '_exit'
  435 |     _exit(0);
      |     ^~~~~
2 errors generated.
[18/96] Building LLVM bitcode Reduction.cpp-amdgpu.o
[19/96] Building CXX object compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o
FAILED: compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o 
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE_RPC_XDR_H=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/.. -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -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 -Wall -Wno-unused-parameter -O3 -DNDEBUG -std=c++17 -m64 -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fno-stack-protector -fno-sanitize=safe-stack -fvisibility=hidden -fno-lto -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -O3 -gline-tables-only -Wno-gnu -Wno-variadic-macros -Wno-c99-extensions -ftrivial-auto-var-init=pattern -nostdinc++ -Wno-format -fno-rtti -Wframe-larger-than=570 -Wglobal-constructors -DSANITIZER_SUPPORTS_WEAK_HOOKS=0 -MD -MT compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -MF compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o.d -o compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibcNoHooks.x86_64.dir/sanitizer_stoptheworld_linux_libcdep.cpp.o -c /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:429:5: error: use of undeclared identifier '_exit'
  429 |     _exit(-1);
      |     ^~~~~
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:435:5: error: use of undeclared identifier '_exit'
  435 |     _exit(0);
      |     ^~~~~
2 errors generated.
[20/96] Building LLVM bitcode Mapping.cpp-amdgpu.o
[21/96] Building LLVM bitcode Synchronization.cpp-amdgpu.o
[22/96] Generating OffloadImplFuncDecls.inc
[23/96] Generating OffloadPrint.hpp
[24/96] Generating OffloadAPI.h
[25/91] Building LLVM bitcode Misc.cpp-amdgpu.o
[26/91] Generating OffloadEntryPoints.inc
[27/90] Building LLVM bitcode State.cpp-amdgpu.o
[28/90] Linking CXX shared library /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/lib/libomptarget.so.22.0git
[29/90] Generating /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/compile_commands.json
[30/90] Building LLVM bitcode Workshare.cpp-amdgpu.o
[31/90] Building LLVM bitcode Parallelism.cpp-amdgpu.o
ninja: build stopped: subcommand failed.
FAILED: runtimes/runtimes-stamps/runtimes-build /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/runtimes/runtimes-stamps/runtimes-build 
cd /home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/runtimes/runtimes-bins && /usr/bin/cmake --build .
ninja: build stopped: subcommand failed.
['ninja'] exited with return code 1.
The build step threw an exception...
Traceback (most recent call last):

```

</details>

https://github.com/llvm/llvm-project/pull/151406