1#!/usr/bin/python3
2# Test that glibc's sys/mman.h constants match the kernel's.
3# Copyright (C) 2018-2022 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
20import argparse
21import sys
22
23import glibcextract
24import glibcsyscalls
25
26
27def 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 = (5, 18)
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.
51        'MAP_HUGE_[0-9].*|MAP_UNINITIALIZED|MAP_FAILED|MAP_ANON'
52        '|MAP_RENAME|MAP_AUTOGROW|MAP_LOCAL|MAP_AUTORSRV|MAP_INHERIT',
53        linux_version_glibc > linux_version_headers,
54        linux_version_headers > linux_version_glibc))
55
56if __name__ == '__main__':
57    main()
58