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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* Copyright (C) 2017 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _UNISTD_H_
#error "Never include this file directly; instead, include <unistd.h>"
#endif
char* __getcwd_chk(char*, size_t, size_t) __INTRODUCED_IN(24);
ssize_t __pread_chk(int, void*, size_t, off_t, size_t) __INTRODUCED_IN(23);
ssize_t __pread_real(int, void*, size_t, off_t) __RENAME(pread);
ssize_t __pread64_chk(int, void*, size_t, off64_t, size_t) __INTRODUCED_IN(23);
ssize_t __pread64_real(int, void*, size_t, off64_t) __RENAME(pread64);
ssize_t __pwrite_chk(int, const void*, size_t, off_t, size_t) __INTRODUCED_IN(24);
ssize_t __pwrite_real(int, const void*, size_t, off_t) __RENAME(pwrite);
ssize_t __pwrite64_chk(int, const void*, size_t, off64_t, size_t) __INTRODUCED_IN(24);
ssize_t __pwrite64_real(int, const void*, size_t, off64_t) __RENAME(pwrite64);
ssize_t __read_chk(int, void*, size_t, size_t) __INTRODUCED_IN(21);
ssize_t __write_chk(int, const void*, size_t, size_t) __INTRODUCED_IN(24);
ssize_t __readlink_chk(const char*, char*, size_t, size_t) __INTRODUCED_IN(23);
ssize_t __readlinkat_chk(int dirfd, const char*, char*, size_t, size_t) __INTRODUCED_IN(23);
#if defined(__BIONIC_FORTIFY)
#if defined(__USE_FILE_OFFSET64)
#define __PREAD_PREFIX(x) __pread64_ ## x
#define __PWRITE_PREFIX(x) __pwrite64_ ## x
#else
#define __PREAD_PREFIX(x) __pread_ ## x
#define __PWRITE_PREFIX(x) __pwrite_ ## x
#endif
#define __error_if_overflows_ssizet(what, fn) \
__clang_error_if((what) > SSIZE_MAX, "in call to '" #fn "', '" #what "' must be <= SSIZE_MAX")
#define __error_if_overflows_objectsize(what, objsize, fn) \
__clang_error_if(__bos_unevaluated_lt((objsize), (what)), \
"in call to '" #fn "', '" #what "' bytes overflows the given object")
#define __bos_trivially_ge_no_overflow(bos_val, index) \
((__bos_dynamic_check_impl_and((bos_val), >=, (index), (bos_val) <= SSIZE_MAX) && \
__builtin_constant_p(index) && (index) <= SSIZE_MAX))
__BIONIC_FORTIFY_INLINE
char* getcwd(char* const __pass_object_size buf, size_t size)
__overloadable
__error_if_overflows_objectsize(size, __bos(buf), getcwd) {
#if __ANDROID_API__ >= 24 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos(buf);
if (!__bos_trivially_ge(bos, size)) {
return __getcwd_chk(buf, size, bos);
}
#endif
return __call_bypassing_fortify(getcwd)(buf, size);
}
#if !defined(__USE_FILE_OFFSET64)
__BIONIC_FORTIFY_INLINE
ssize_t pread(int fd, void* const __pass_object_size0 buf, size_t count, off_t offset)
__overloadable
__error_if_overflows_ssizet(count, pread)
__error_if_overflows_objectsize(count, __bos0(buf), pread) {
#if __ANDROID_API__ >= 23 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos0(buf);
if (!__bos_trivially_ge_no_overflow(bos, count)) {
return __PREAD_PREFIX(chk)(fd, buf, count, offset, bos);
}
#endif
return __PREAD_PREFIX(real)(fd, buf, count, offset);
}
#endif /* !defined(__USE_FILE_OFFSET64) */
__BIONIC_FORTIFY_INLINE
ssize_t pread64(int fd, void* const __pass_object_size0 buf, size_t count, off64_t offset)
__overloadable
__error_if_overflows_ssizet(count, pread64)
__error_if_overflows_objectsize(count, __bos0(buf), pread64) {
#if __ANDROID_API__ >= 23 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos0(buf);
if (!__bos_trivially_ge_no_overflow(bos, count)) {
return __pread64_chk(fd, buf, count, offset, bos);
}
#endif
return __pread64_real(fd, buf, count, offset);
}
#if !defined(__USE_FILE_OFFSET64)
__BIONIC_FORTIFY_INLINE
ssize_t pwrite(int fd, const void* const __pass_object_size0 buf, size_t count, off_t offset)
__overloadable
__error_if_overflows_ssizet(count, pwrite)
__error_if_overflows_objectsize(count, __bos0(buf), pwrite) {
#if __ANDROID_API__ >= 24 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos0(buf);
if (!__bos_trivially_ge_no_overflow(bos, count)) {
return __PWRITE_PREFIX(chk)(fd, buf, count, offset, bos);
}
#endif
return __PWRITE_PREFIX(real)(fd, buf, count, offset);
}
#endif /* !defined(__USE_FILE_OFFSET64) */
__BIONIC_FORTIFY_INLINE
ssize_t pwrite64(int fd, const void* const __pass_object_size0 buf, size_t count, off64_t offset)
__overloadable
__error_if_overflows_ssizet(count, pwrite64)
__error_if_overflows_objectsize(count, __bos0(buf), pwrite64) {
#if __ANDROID_API__ >= 24 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos0(buf);
if (!__bos_trivially_ge_no_overflow(bos, count)) {
return __pwrite64_chk(fd, buf, count, offset, bos);
}
#endif
return __pwrite64_real(fd, buf, count, offset);
}
__BIONIC_FORTIFY_INLINE
ssize_t read(int fd, void* const __pass_object_size0 buf, size_t count)
__overloadable
__error_if_overflows_ssizet(count, read)
__error_if_overflows_objectsize(count, __bos0(buf), read) {
#if __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos0(buf);
if (!__bos_trivially_ge_no_overflow(bos, count)) {
return __read_chk(fd, buf, count, bos);
}
#endif
return __call_bypassing_fortify(read)(fd, buf, count);
}
__BIONIC_FORTIFY_INLINE
ssize_t write(int fd, const void* const __pass_object_size0 buf, size_t count)
__overloadable
__error_if_overflows_ssizet(count, write)
__error_if_overflows_objectsize(count, __bos0(buf), write) {
#if __ANDROID_API__ >= 24 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos0(buf);
if (!__bos_trivially_ge_no_overflow(bos, count)) {
return __write_chk(fd, buf, count, bos);
}
#endif
return __call_bypassing_fortify(write)(fd, buf, count);
}
__BIONIC_FORTIFY_INLINE
ssize_t readlink(const char* path, char* const __pass_object_size buf, size_t size)
__overloadable
__error_if_overflows_ssizet(size, readlink)
__error_if_overflows_objectsize(size, __bos(buf), readlink) {
#if __ANDROID_API__ >= 23 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos(buf);
if (!__bos_trivially_ge_no_overflow(bos, size)) {
return __readlink_chk(path, buf, size, bos);
}
#endif
return __call_bypassing_fortify(readlink)(path, buf, size);
}
__BIONIC_FORTIFY_INLINE
ssize_t readlinkat(int dirfd, const char* path, char* const __pass_object_size buf, size_t size)
__overloadable
__error_if_overflows_ssizet(size, readlinkat)
__error_if_overflows_objectsize(size, __bos(buf), readlinkat) {
#if __ANDROID_API__ >= 23 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
size_t bos = __bos(buf);
if (!__bos_trivially_ge_no_overflow(bos, size)) {
return __readlinkat_chk(dirfd, path, buf, size, bos);
}
#endif
return __call_bypassing_fortify(readlinkat)(dirfd, path, buf, size);
}
#undef __bos_trivially_ge_no_overflow
#undef __enable_if_no_overflow_ssizet
#undef __error_if_overflows_objectsize
#undef __error_if_overflows_ssizet
#undef __PREAD_PREFIX
#undef __PWRITE_PREFIX
#endif /* defined(__BIONIC_FORTIFY) */
|
