1# VCSToChangeLog Quirks for the GNU C Library.
2
3# Copyright (C) 2019-2022 Free Software Foundation, Inc.
4#
5# The GNU C Library is free software; you can redistribute it and/or
6# modify it under the terms of the GNU Lesser General Public
7# License as published by the Free Software Foundation; either
8# version 2.1 of the License, or (at your option) any later version.
9#
10# The GNU C Library is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13# Lesser General Public License for more details.
14#
15# You should have received a copy of the GNU Lesser General Public
16# License along with the GNU C Library; if not, see
17# <http://www.gnu.org/licenses/>.
18
19from frontend_c import Frontend
20from projectquirks import ProjectQuirks
21import re
22
23class GlibcProjectQuirks(ProjectQuirks):
24    repo = 'git'
25
26    IGNORE_LIST = [
27        'ChangeLog',
28        'sysdeps/x86_64/dl-trampoline.h'
29    ]
30
31    MACRO_QUIRKS = \
32        [{'orig': r'ElfW\((\w+)\)', 'sub': r'\1__ELF_NATIVE_CLASS_t'},
33         {'orig': r'(libc_freeres_fn)\s*\((\w+)\)', 'sub': r'static void \1__\2 (void)'},
34         {'orig': r'(IMPL)\s*\((\w+), .*\)$', 'sub': r'static void \1__\2 (void) {}'},
35         {'orig': r'__(BEGIN|END)_DECLS', 'sub': r''},
36         {'orig': 'weak_function', 'sub': '__attribute__ ((weak))'},
37         {'orig': r'ATTRIBUTE_(CONST|MALLOC|PURE|FORMAT)',
38          'sub': r'__attribute__ ((\1))'},
39         {'orig': r'__THROW', 'sub': r'__attribute__ ((__nothrow__ __LEAF))'},
40         {'orig': r'__THROWNL', 'sub': r'__attribute__ ((__nothrow__))'},
41         {'orig': r'__nonnull \(\(([^)]+)\)\)',
42          'sub': r'__attribute__ ((__nonnull__ \1))'},
43         {'orig': r'([^_])attribute_(\w+)', 'sub': r'\1__attribute__ ((\2))'},
44         {'orig': r'^attribute_(\w+)', 'sub': r'__attribute__ ((\1))'}]
45
46    def __init__(self, debug):
47        self.debug = debug
48        ''' Build a list of macro calls used for symbol versioning and attributes.
49
50        glibc uses a set of macro calls that do not end with a semi-colon and hence
51        breaks our parser.  Identify those calls from include/libc-symbols.h and
52        filter them out.
53        '''
54        with open('include/libc-symbols.h') as macrofile:
55            op = macrofile.readlines()
56            op = Frontend.remove_comments(self, op)
57            self.C_MACROS = [re.sub(r'.*define (\w+).*', r'\1', x[:-1]) for x in op \
58                             if 'define ' in x]
59
60        super().__init__()
61
62def get_project_quirks(debug):
63    ''' Accessor function.
64    '''
65    return GlibcProjectQuirks(debug)
66