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
|
//===-- sanitizer_wrappers.cpp ----------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Redirect some functions to sanitizer interceptors.
//
//===----------------------------------------------------------------------===//
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include <tuple>
namespace __sanitizer {
unsigned long internal_open(const char *filename, int flags);
unsigned long internal_open(const char *filename, int flags, unsigned mode);
unsigned long internal_close(int fd);
unsigned long internal_stat(const char *path, void *buf);
unsigned long internal_lstat(const char *path, void *buf);
unsigned long internal_fstat(int fd, void *buf);
size_t internal_strlen(const char *s);
unsigned long internal_mmap(void *addr, uintptr_t length, int prot, int flags,
int fd, unsigned long long offset);
void *internal_memcpy(void *dest, const void *src, unsigned long n);
// Used to propagate errno.
bool internal_iserror(uintptr_t retval, int *rverrno = 0);
} // namespace __sanitizer
namespace {
template <typename T>
struct GetTypes;
template <typename R, typename... Args>
struct GetTypes<R(Args...)> {
using Result = R;
template <size_t i>
struct Arg {
using Type = typename std::tuple_element<i, std::tuple<Args...>>::type;
};
};
#define LLVM_SYMBOLIZER_GET_FUNC(Function) \
((__interceptor_##Function) \
? (__interceptor_##Function) \
: reinterpret_cast<decltype(&Function)>(dlsym(RTLD_NEXT, #Function)))
#define LLVM_SYMBOLIZER_INTERCEPTOR1(Function, ...) \
GetTypes<__VA_ARGS__>::Result __interceptor_##Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type) __attribute__((weak)); \
GetTypes<__VA_ARGS__>::Result Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type arg0) { \
return LLVM_SYMBOLIZER_GET_FUNC(Function)(arg0); \
}
#define LLVM_SYMBOLIZER_INTERCEPTOR2(Function, ...) \
GetTypes<__VA_ARGS__>::Result __interceptor_##Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type, \
GetTypes<__VA_ARGS__>::Arg<1>::Type) __attribute__((weak)); \
GetTypes<__VA_ARGS__>::Result Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type arg0, \
GetTypes<__VA_ARGS__>::Arg<1>::Type arg1) { \
return LLVM_SYMBOLIZER_GET_FUNC(Function)(arg0, arg1); \
}
#define LLVM_SYMBOLIZER_INTERCEPTOR3(Function, ...) \
GetTypes<__VA_ARGS__>::Result __interceptor_##Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type, \
GetTypes<__VA_ARGS__>::Arg<1>::Type, \
GetTypes<__VA_ARGS__>::Arg<2>::Type) __attribute__((weak)); \
GetTypes<__VA_ARGS__>::Result Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type arg0, \
GetTypes<__VA_ARGS__>::Arg<1>::Type arg1, \
GetTypes<__VA_ARGS__>::Arg<2>::Type arg2) { \
return LLVM_SYMBOLIZER_GET_FUNC(Function)(arg0, arg1, arg2); \
}
#define LLVM_SYMBOLIZER_INTERCEPTOR4(Function, ...) \
GetTypes<__VA_ARGS__>::Result __interceptor_##Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type, \
GetTypes<__VA_ARGS__>::Arg<1>::Type, \
GetTypes<__VA_ARGS__>::Arg<2>::Type, \
GetTypes<__VA_ARGS__>::Arg<3>::Type) __attribute__((weak)); \
GetTypes<__VA_ARGS__>::Result Function( \
GetTypes<__VA_ARGS__>::Arg<0>::Type arg0, \
GetTypes<__VA_ARGS__>::Arg<1>::Type arg1, \
GetTypes<__VA_ARGS__>::Arg<2>::Type arg2, \
GetTypes<__VA_ARGS__>::Arg<3>::Type arg3) { \
return LLVM_SYMBOLIZER_GET_FUNC(Function)(arg0, arg1, arg2, arg3); \
}
} // namespace
// C-style interface around internal sanitizer libc functions.
extern "C" {
#define RETURN_OR_SET_ERRNO(T, res) \
int rverrno; \
if (__sanitizer::internal_iserror(res, &rverrno)) { \
errno = rverrno; \
return (T)-1; \
} \
return (T)res;
int open(const char *filename, int flags, ...) {
unsigned long res;
if (flags | O_CREAT) {
va_list va;
va_start(va, flags);
unsigned mode = va_arg(va, unsigned);
va_end(va);
res = __sanitizer::internal_open(filename, flags, mode);
} else {
res = __sanitizer::internal_open(filename, flags);
}
RETURN_OR_SET_ERRNO(int, res);
}
int close(int fd) {
unsigned long res = __sanitizer::internal_close(fd);
RETURN_OR_SET_ERRNO(int, res);
}
#define STAT(func, arg, buf) \
unsigned long res = __sanitizer::internal_##func(arg, buf); \
RETURN_OR_SET_ERRNO(int, res);
int stat(const char *path, struct stat *buf) { STAT(stat, path, buf); }
int lstat(const char *path, struct stat *buf) { STAT(lstat, path, buf); }
int fstat(int fd, struct stat *buf) { STAT(fstat, fd, buf); }
// Redirect versioned stat functions to the __sanitizer::internal() as well.
int __xstat(int version, const char *path, struct stat *buf) {
STAT(stat, path, buf);
}
int __lxstat(int version, const char *path, struct stat *buf) {
STAT(lstat, path, buf);
}
int __fxstat(int version, int fd, struct stat *buf) { STAT(fstat, fd, buf); }
size_t strlen(const char *s) { return __sanitizer::internal_strlen(s); }
void *mmap(void *addr, size_t length, int prot, int flags, int fd,
off_t offset) {
unsigned long res =
__sanitizer::internal_mmap(addr, length, prot, flags, fd, offset);
RETURN_OR_SET_ERRNO(void *, res);
}
LLVM_SYMBOLIZER_INTERCEPTOR3(read, ssize_t(int, void *, size_t))
LLVM_SYMBOLIZER_INTERCEPTOR4(pread, ssize_t(int, void *, size_t, off_t))
LLVM_SYMBOLIZER_INTERCEPTOR4(pread64, ssize_t(int, void *, size_t, off64_t))
LLVM_SYMBOLIZER_INTERCEPTOR2(realpath, char *(const char *, char *))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_cond_broadcast, int(pthread_cond_t *))
LLVM_SYMBOLIZER_INTERCEPTOR2(pthread_cond_wait,
int(pthread_cond_t *, pthread_mutex_t *))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_mutex_lock, int(pthread_mutex_t *))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_mutex_unlock, int(pthread_mutex_t *))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_mutex_destroy, int(pthread_mutex_t *))
LLVM_SYMBOLIZER_INTERCEPTOR2(pthread_mutex_init,
int(pthread_mutex_t *,
const pthread_mutexattr_t *))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_mutexattr_destroy,
int(pthread_mutexattr_t *))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_mutexattr_init, int(pthread_mutexattr_t *))
LLVM_SYMBOLIZER_INTERCEPTOR2(pthread_mutexattr_settype,
int(pthread_mutexattr_t *, int))
LLVM_SYMBOLIZER_INTERCEPTOR1(pthread_getspecific, void *(pthread_key_t))
LLVM_SYMBOLIZER_INTERCEPTOR2(pthread_key_create,
int(pthread_key_t *, void (*)(void *)))
LLVM_SYMBOLIZER_INTERCEPTOR2(pthread_once,
int(pthread_once_t *, void (*)(void)))
LLVM_SYMBOLIZER_INTERCEPTOR2(pthread_setspecific,
int(pthread_key_t, const void *))
LLVM_SYMBOLIZER_INTERCEPTOR3(pthread_sigmask,
int(int, const sigset_t *, sigset_t *))
} // extern "C"
|
