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c0c9524a11
The pidfd interface was extended with:
* PIDFD_GET_INFO and pidfd_info (along with related extra flags) to
allow get information about the process without the need to parse
/proc (commit cdda1f26e74ba, Linux 6.13).
* PIDFD_SELF_{THREAD,THREAD_GROUP,SELF,SELF_PROCESS} to allow
pidfd_send_signal refer to the own process or thread lead groups
without the need of allocating a file descriptor (commit f08d0c3a71114,
Linux 6.15).
* PIDFD_INFO_COREDUMP that extends PIDFD_GET_INFO to obtain coredump
information.
Linux uAPI header defines both PIDFD_SELF_THREAD and
PIDFD_SELF_THREAD_GROUP on linux/fcntl.h (since they reserve part of the
AT_* values), however for glibc I do not see any good reason to add pidfd
definitions on fcntl-linux.h.
The tst-pidfd.c is extended with some PIDFD_SELF_* tests and a new
‘tst-pidfd_getinfo.c’ test is added to check PIDFD_GET_INFO. The
PIDFD_INFO_COREDUMP tests would require very large and complex tests
that are already covered by kernel tests.
Checked on aarch64-linux-gnu and x86_64-linux-gnu on kernels 6.8 and
6.17.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
#!/usr/bin/python3
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# Test that glibc's sys/pidfd.h constants match the kernel's.
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# Copyright (C) 2022-2025 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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import argparse
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import sys
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import glibcextract
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import glibcsyscalls
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def main():
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"""The main entry point."""
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parser = argparse.ArgumentParser(
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description="Test that glibc's sys/pidfd.h constants "
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"match the kernel's.")
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parser.add_argument('--cc', metavar='CC',
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help='C compiler (including options) to use')
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args = parser.parse_args()
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if glibcextract.compile_c_snippet(
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'#include <linux/pidfd.h>',
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args.cc).returncode != 0:
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sys.exit (77)
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linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
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linux_version_glibc = (6, 17)
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sys.exit(glibcextract.compare_macro_consts(
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'#include <sys/pidfd.h>\n',
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'#include <asm/fcntl.h>\n'
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'#include <linux/pidfd.h>\n',
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args.cc,
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'PIDFD_.*',
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None,
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linux_version_glibc > linux_version_headers,
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linux_version_headers > linux_version_glibc))
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if __name__ == '__main__':
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main()
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