sysdeps/unix/sysv/linux/tst-mman-consts.py

   1 #!/usr/bin/python3
   2 # Test that glibc's sys/mman.h constants match the kernel's.
   3 # Copyright (C) 2018-2023 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5 #
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2.1 of the License, or (at your option) any later version.
  10 #
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with the GNU C Library; if not, see
  18 # <https://www.gnu.org/licenses/>.
  19
  20 import argparse
  21 import sys
  22
  23 import glibcextract
  24 import glibcsyscalls
  25
  26
  27 def main():
  28     """The main entry point."""
  29     parser = argparse.ArgumentParser(
  30         description="Test that glibc's sys/mman.h constants "
  31         "match the kernel's.")
  32     parser.add_argument('--cc', metavar='CC',
  33                         help='C compiler (including options) to use')
  34     args = parser.parse_args()
  35     linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
  36     linux_version_glibc = (6, 6)
  37     sys.exit(glibcextract.compare_macro_consts(
  38         '#define _GNU_SOURCE 1\n'
  39         '#include <sys/mman.h>\n',
  40         '#define _GNU_SOURCE 1\n'
  41         '#include <linux/mman.h>\n',
  42         args.cc,
  43         'MAP_.*',
  44         # A series of MAP_HUGE_<size> macros are defined by the kernel
  45         # but not by glibc.  MAP_UNINITIALIZED is kernel-only.
  46         # MAP_FAILED is not a MAP_* flag and is glibc-only, as is the
  47         # MAP_ANON alias for MAP_ANONYMOUS.  MAP_RENAME, MAP_AUTOGROW,
  48         # MAP_LOCAL and MAP_AUTORSRV are in the kernel header for
  49         # MIPS, marked as "not used by linux"; SPARC has MAP_INHERIT
  50         # in the kernel header, but does not use it.  The kernel
  51         # header for HPPA removed a define of MAP_VARIABLE to 0 in
  52         # Linux 6.2.
  53         'MAP_HUGE_[0-9].*|MAP_UNINITIALIZED|MAP_FAILED|MAP_ANON'
  54         '|MAP_RENAME|MAP_AUTOGROW|MAP_LOCAL|MAP_AUTORSRV|MAP_INHERIT'
  55         '|MAP_VARIABLE',
  56         linux_version_glibc > linux_version_headers,
  57         linux_version_headers > linux_version_glibc))
  58
  59 if __name__ == '__main__':
  60     main()