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176671f604
A desired hugetlb page size can be encoded in the flags parameter of system calls such as mmap() and shmget(). The Linux UAPI headers have included explicit definitions for these encodings since v4.14. This patch adds these definitions that are used along with MAP_HUGETLB and SHM_HUGETLB flags as specified in the corresponding man pages. This relieves programs from having to duplicate and/or compute the encodings manually. Additionally, the filter on these definitions in tst-mman-consts.py is removed, as suggested by Florian. I then ran this tests successfully, confirming the alignment with the kernel headers. PASS: misc/tst-mman-consts original exit status 0 Signed-off-by: Carlos Llamas <cmllamas@google.com> Tested-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Florian Weimer <fweimer@redhat.com>
58 lines
2.3 KiB
Python
58 lines
2.3 KiB
Python
#!/usr/bin/python3
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# Test that glibc's sys/mman.h constants match the kernel's.
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# Copyright (C) 2018-2024 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/mman.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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linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
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linux_version_glibc = (6, 9)
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sys.exit(glibcextract.compare_macro_consts(
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'#define _GNU_SOURCE 1\n'
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'#include <sys/mman.h>\n',
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'#define _GNU_SOURCE 1\n'
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'#include <linux/mman.h>\n',
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args.cc,
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'MAP_.*',
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# MAP_UNINITIALIZED is defined by the kernel but not by glibc.
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# MAP_FAILED is not a MAP_* flag and is glibc-only, as is the
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# MAP_ANON alias for MAP_ANONYMOUS. MAP_RENAME, MAP_AUTOGROW,
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# MAP_LOCAL and MAP_AUTORSRV are in the kernel header for
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# MIPS, marked as "not used by linux"; SPARC has MAP_INHERIT
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# in the kernel header, but does not use it. The kernel
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# header for HPPA removed a define of MAP_VARIABLE to 0 in
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# Linux 6.2.
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'MAP_UNINITIALIZED|MAP_FAILED|MAP_ANON|MAP_RENAME|MAP_AUTOGROW'
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'|MAP_LOCAL|MAP_AUTORSRV|MAP_INHERIT|MAP_VARIABLE',
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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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