conform/glibcconform.py

   1 #!/usr/bin/python
   2 # Shared code for glibc conformance tests.
   3 # Copyright (C) 2018 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 # <http://www.gnu.org/licenses/>.
  19
  20 import os.path
  21 import re
  22 import subprocess
  23 import tempfile
  24
  25
  26 # Compiler options for each standard.
  27 CFLAGS = {'ISO': '-ansi',
  28           'ISO99': '-std=c99',
  29           'ISO11': '-std=c11',
  30           'POSIX': '-D_POSIX_C_SOURCE=199506L -ansi',
  31           'XPG4': '-ansi -D_XOPEN_SOURCE',
  32           'XPG42': '-ansi -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED',
  33           'UNIX98': '-ansi -D_XOPEN_SOURCE=500',
  34           'XOPEN2K': '-std=c99 -D_XOPEN_SOURCE=600',
  35           'XOPEN2K8': '-std=c99 -D_XOPEN_SOURCE=700',
  36           'POSIX2008': '-std=c99 -D_POSIX_C_SOURCE=200809L'}
  37
  38
  39 def list_exported_functions(cc, standard, header):
  40     """Return the set of functions exported by a header, empty if an
  41     include of the header does not compile.
  42
  43     """
  44     cc_all = '%s -D_ISOMAC %s' % (cc, CFLAGS[standard])
  45     with tempfile.TemporaryDirectory() as temp_dir:
  46         c_file_name = os.path.join(temp_dir, 'test.c')
  47         aux_file_name = os.path.join(temp_dir, 'test.c.aux')
  48         with open(c_file_name, 'w') as c_file:
  49             c_file.write('#include <%s>\n' % header)
  50         fns = set()
  51         cmd = ('%s -c %s -o /dev/null -aux-info %s'
  52                % (cc_all, c_file_name, aux_file_name))
  53         try:
  54             subprocess.check_call(cmd, shell=True)
  55         except subprocess.CalledProcessError:
  56             return fns
  57         with open(aux_file_name, 'r') as aux_file:
  58             for line in aux_file:
  59                 line = re.sub(r'/\*.*?\*/', '', line)
  60                 line = line.strip()
  61                 if line:
  62                     # The word before a '(' that isn't '(*' is the
  63                     # function name before the argument list (not
  64                     # fully general, but sufficient for -aux-info
  65                     # output on standard headers).
  66                     m = re.search(r'([A-Za-z0-9_]+) *\([^*]', line)
  67                     if m:
  68                         fns.add(m.group(1))
  69                     else:
  70                         raise ValueError("couldn't parse -aux-info output: %s"
  71                                          % line)
  72     return fns