[libc-commits] [libc] [libc] Implement process_mrelease (PR #117851)

[LLVM Continuous Integration via libc-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-riscv64-debian-dbg` running on `libc-riscv64-debian` while building `libc` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/188/builds/7380

<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)
...
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Performing Test HAVE_POSIX_REGEX -- success
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Performing Test HAVE_PTHREAD_AFFINITY -- failed to compile
-- Configuring done
-- Generating done
-- Build files have been written to: /home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/build
@@@BUILD_STEP build libc@@@
Running: ninja libc
[1/2] Building CXX object projects/libc/src/sys/mman/linux/CMakeFiles/libc.src.sys.mman.linux.process_mrelease.dir/process_mrelease.cpp.o
FAILED: projects/libc/src/sys/mman/linux/CMakeFiles/libc.src.sys.mman.linux.process_mrelease.dir/process_mrelease.cpp.o 
/usr/bin/clang++ -DLIBC_NAMESPACE=__llvm_libc_18_0_0_git -D_DEBUG -I/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/build/projects/libc/src/sys/mman/linux -I/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/llvm-project/libc/src/sys/mman/linux -I/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/llvm-project/libc -isystem /home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/build/projects/libc/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 -g -DLIBC_QSORT_IMPL=LIBC_QSORT_QUICK_SORT -DLIBC_ADD_NULL_CHECKS -fpie -fno-builtin -fno-exceptions -fno-lax-vector-conversions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -ftrivial-auto-var-init=pattern -fno-omit-frame-pointer -Wall -Wextra -Werror -Wconversion -Wno-sign-conversion -Wno-c99-extensions -Wno-gnu-imaginary-constant -Wno-pedantic -Wimplicit-fallthrough -Wwrite-strings -Wextra-semi -Wnewline-eof -Wnonportable-system-include-path -Wstrict-prototypes -Wthread-safety -Wglobal-constructors -DLIBC_COPT_PUBLIC_PACKAGING -std=c++17 -MD -MT projects/libc/src/sys/mman/linux/CMakeFiles/libc.src.sys.mman.linux.process_mrelease.dir/process_mrelease.cpp.o -MF projects/libc/src/sys/mman/linux/CMakeFiles/libc.src.sys.mman.linux.process_mrelease.dir/process_mrelease.cpp.o.d -o projects/libc/src/sys/mman/linux/CMakeFiles/libc.src.sys.mman.linux.process_mrelease.dir/process_mrelease.cpp.o -c /home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/llvm-project/libc/src/sys/mman/linux/process_mrelease.cpp
/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/llvm-project/libc/src/sys/mman/linux/process_mrelease.cpp:23:41: error: use of undeclared identifier 'SYS_process_mrelease'
      LIBC_NAMESPACE::syscall_impl<int>(SYS_process_mrelease, pidfd, flags);
                                        ^
1 error generated.
ninja: build stopped: subcommand failed.
['ninja', 'libc'] exited with return code 1.
The build step threw an exception...
Traceback (most recent call last):
  File "/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/build/../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py", line 162, in step
    yield
  File "/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/build/../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py", line 124, in main
    run_command(['ninja', 'libc'])
  File "/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/build/../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py", line 177, in run_command
    util.report_run_cmd(cmd, cwd=directory)
  File "/home/libc_worker/libc-riscv64-debian/libc-riscv64-debian-dbg/llvm-zorg/zorg/buildbot/builders/annotated/util.py", line 49, in report_run_cmd
    subprocess.check_call(cmd, shell=shell, *args, **kwargs)
  File "/usr/lib/python3.10/subprocess.py", line 369, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['ninja', 'libc']' returned non-zero exit status 1.
@@@STEP_FAILURE@@@
@@@BUILD_STEP libc-unit-tests@@@
Running: ninja libc-unit-tests

```

</details>

https://github.com/llvm/llvm-project/pull/117851