1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* Copyright (C) 2004-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _STRING_H
# error "Never use <bits/string3.h> directly; include <string.h> instead."
#endif
#if !__GNUC_PREREQ (5,0)
__warndecl (__warn_memset_zero_len,
"memset used with constant zero length parameter; this could be due to transposed parameters");
#endif
#ifndef __cplusplus
/* XXX This is temporarily. We should not redefine any of the symbols
and instead integrate the error checking into the original
definitions. */
# undef memcpy
# undef memmove
# undef memset
# undef strcat
# undef strcpy
# undef strncat
# undef strncpy
# ifdef __USE_GNU
# undef mempcpy
# undef stpcpy
# endif
# ifdef __USE_MISC
# undef bcopy
# undef bzero
# endif
#endif
__fortify_function void *
__NTH (memcpy (void *__restrict __dest, const void *__restrict __src,
size_t __len))
{
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
}
__fortify_function void *
__NTH (memmove (void *__dest, const void *__src, size_t __len))
{
return __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest));
}
#ifdef __USE_GNU
__fortify_function void *
__NTH (mempcpy (void *__restrict __dest, const void *__restrict __src,
size_t __len))
{
return __builtin___mempcpy_chk (__dest, __src, __len, __bos0 (__dest));
}
#endif
/* The first two tests here help to catch a somewhat common problem
where the second and third parameter are transposed. This is
especially problematic if the intended fill value is zero. In this
case no work is done at all. We detect these problems by referring
non-existing functions. */
__fortify_function void *
__NTH (memset (void *__dest, int __ch, size_t __len))
{
/* GCC-5.0 and newer implements these checks in the compiler, so we don't
need them here. */
#if !__GNUC_PREREQ (5,0)
if (__builtin_constant_p (__len) && __len == 0
&& (!__builtin_constant_p (__ch) || __ch != 0))
{
__warn_memset_zero_len ();
return __dest;
}
#endif
return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest));
}
#ifdef __USE_MISC
__fortify_function void
__NTH (bcopy (const void *__src, void *__dest, size_t __len))
{
(void) __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest));
}
__fortify_function void
__NTH (bzero (void *__dest, size_t __len))
{
(void) __builtin___memset_chk (__dest, '\0', __len, __bos0 (__dest));
}
#endif
__fortify_function char *
__NTH (strcpy (char *__restrict __dest, const char *__restrict __src))
{
return __builtin___strcpy_chk (__dest, __src, __bos (__dest));
}
#ifdef __USE_GNU
__fortify_function char *
__NTH (stpcpy (char *__restrict __dest, const char *__restrict __src))
{
return __builtin___stpcpy_chk (__dest, __src, __bos (__dest));
}
#endif
__fortify_function char *
__NTH (strncpy (char *__restrict __dest, const char *__restrict __src,
size_t __len))
{
return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
}
// XXX We have no corresponding builtin yet.
extern char *__stpncpy_chk (char *__dest, const char *__src, size_t __n,
size_t __destlen) __THROW;
extern char *__REDIRECT_NTH (__stpncpy_alias, (char *__dest, const char *__src,
size_t __n), stpncpy);
__fortify_function char *
__NTH (stpncpy (char *__dest, const char *__src, size_t __n))
{
if (__bos (__dest) != (size_t) -1
&& (!__builtin_constant_p (__n) || __n <= __bos (__dest)))
return __stpncpy_chk (__dest, __src, __n, __bos (__dest));
return __stpncpy_alias (__dest, __src, __n);
}
__fortify_function char *
__NTH (strcat (char *__restrict __dest, const char *__restrict __src))
{
return __builtin___strcat_chk (__dest, __src, __bos (__dest));
}
__fortify_function char *
__NTH (strncat (char *__restrict __dest, const char *__restrict __src,
size_t __len))
{
return __builtin___strncat_chk (__dest, __src, __len, __bos (__dest));
}
|
