[libc-commits] [libc] [libc] Remove _Exit proxy func header and use LIBC_NAMESPACE::_Exit in tests (PR #114904)

[LLVM Continuous Integration via libc-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-x86_64-debian-gcc-fullbuild-dbg` running on `libc-x86_64-debian-fullbuild` while building `libc` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/131/builds/9925

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

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py ...' (failure)
...
[1088/1095] Running unit test libc.test.src.math.smoke.lrintl_test.__unit__
[==========] Running 3 tests from 1 test suite.
[ RUN      ] LlvmLibcRoundToIntegerTest.InfinityAndNaN
[       OK ] LlvmLibcRoundToIntegerTest.InfinityAndNaN (6 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.RoundNumbers
[       OK ] LlvmLibcRoundToIntegerTest.RoundNumbers (8 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.SubnormalRange
[       OK ] LlvmLibcRoundToIntegerTest.SubnormalRange (1381 ms)
Ran 3 tests.  PASS: 3  FAIL: 0
[1089/1095] Building CXX object projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.atexit_test.__unit__.__build__.dir/atexit_test.cpp.o
FAILED: projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.atexit_test.__unit__.__build__.dir/atexit_test.cpp.o 
/usr/bin/g++ -DLIBC_NAMESPACE=__llvm_libc_19_0_0_git -D_DEBUG -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/build/projects/libc/test/src/stdlib -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc -isystem /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/build/projects/libc/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -fpie -DLIBC_FULL_BUILD -ffreestanding -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -fext-numeric-literals -Wno-pedantic -std=c++17 -MD -MT projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.atexit_test.__unit__.__build__.dir/atexit_test.cpp.o -MF projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.atexit_test.__unit__.__build__.dir/atexit_test.cpp.o.d -o projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.atexit_test.__unit__.__build__.dir/atexit_test.cpp.o -c /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/atexit_test.cpp
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/atexit_test.cpp: In lambda function:
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/atexit_test.cpp:36:50: error: ‘_Exit’ is not a member of ‘__llvm_libc_19_0_0_git’; did you mean ‘_Exit’?
   36 |     LIBC_NAMESPACE::atexit(+[] { LIBC_NAMESPACE::_Exit(1); });
      |                                                  ^~~~~
In file included from /usr/lib/gcc/x86_64-linux-gnu/12/include/mm_malloc.h:27,
                 from /usr/lib/gcc/x86_64-linux-gnu/12/include/xmmintrin.h:34,
                 from /usr/lib/gcc/x86_64-linux-gnu/12/include/immintrin.h:31,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/string/memory_utils/op_x86.h:26,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/string/memory_utils/x86_64/inline_memcpy.h:14,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/string/memory_utils/inline_memcpy.h:22,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/__support/CPP/string.h:18,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/UnitTest/LibcTest.h:29,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/UnitTest/Test.h:37,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/atexit_test.cpp:13:
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/build/projects/libc/include/stdlib.h:101:16: note: ‘_Exit’ declared here
  101 | _Noreturn void _Exit(int) __NOEXCEPT;
      |                ^~~~~
[1090/1095] Running unit test libc.test.src.time.nanosleep_test.__unit__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcNanosleep.SmokeTest
[       OK ] LlvmLibcNanosleep.SmokeTest (35 us)
Ran 1 tests.  PASS: 1  FAIL: 0
[1091/1095] Building CXX object projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.at_quick_exit_test.__unit__.__build__.dir/at_quick_exit_test.cpp.o
FAILED: projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.at_quick_exit_test.__unit__.__build__.dir/at_quick_exit_test.cpp.o 
/usr/bin/g++ -DLIBC_NAMESPACE=__llvm_libc_19_0_0_git -D_DEBUG -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/build/projects/libc/test/src/stdlib -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib -I/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc -isystem /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/build/projects/libc/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -fpie -DLIBC_FULL_BUILD -ffreestanding -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -fext-numeric-literals -Wno-pedantic -std=c++17 -MD -MT projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.at_quick_exit_test.__unit__.__build__.dir/at_quick_exit_test.cpp.o -MF projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.at_quick_exit_test.__unit__.__build__.dir/at_quick_exit_test.cpp.o.d -o projects/libc/test/src/stdlib/CMakeFiles/libc.test.src.stdlib.at_quick_exit_test.__unit__.__build__.dir/at_quick_exit_test.cpp.o -c /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/at_quick_exit_test.cpp
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/at_quick_exit_test.cpp: In lambda function:
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/src/stdlib/at_quick_exit_test.cpp:36:57: error: ‘_Exit’ is not a member of ‘__llvm_libc_19_0_0_git’; did you mean ‘_Exit’?
   36 |     LIBC_NAMESPACE::at_quick_exit(+[] { LIBC_NAMESPACE::_Exit(1); });
      |                                                         ^~~~~
In file included from /usr/lib/gcc/x86_64-linux-gnu/12/include/mm_malloc.h:27,
                 from /usr/lib/gcc/x86_64-linux-gnu/12/include/xmmintrin.h:34,
                 from /usr/lib/gcc/x86_64-linux-gnu/12/include/immintrin.h:31,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/string/memory_utils/op_x86.h:26,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/string/memory_utils/x86_64/inline_memcpy.h:14,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/string/memory_utils/inline_memcpy.h:22,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/src/__support/CPP/string.h:18,
                 from /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-gcc-fullbuild-dbg/llvm-project/libc/test/UnitTest/LibcTest.h:29,

```

</details>

https://github.com/llvm/llvm-project/pull/114904