1 //===-- asan_interceptors.h -------------------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file is a part of AddressSanitizer, an address sanity checker.
11 //
12 // ASan-private header for asan_interceptors.cc
13 //===----------------------------------------------------------------------===//
14 #ifndef ASAN_INTERCEPTORS_H
15 #define ASAN_INTERCEPTORS_H
16
17 #include "asan_internal.h"
18 #include "interception/interception.h"
19 #include "sanitizer_common/sanitizer_platform_interceptors.h"
20
21 // Use macro to describe if specific function should be
22 // intercepted on a given platform.
23 #if !SANITIZER_WINDOWS
24 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 1
25 # define ASAN_INTERCEPT__LONGJMP 1
26 # define ASAN_INTERCEPT_STRDUP 1
27 # define ASAN_INTERCEPT_INDEX 1
28 # define ASAN_INTERCEPT_PTHREAD_CREATE 1
29 # define ASAN_INTERCEPT_FORK 1
30 #else
31 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0
32 # define ASAN_INTERCEPT__LONGJMP 0
33 # define ASAN_INTERCEPT_STRDUP 0
34 # define ASAN_INTERCEPT_INDEX 0
35 # define ASAN_INTERCEPT_PTHREAD_CREATE 0
36 # define ASAN_INTERCEPT_FORK 0
37 #endif
38
39 #if SANITIZER_FREEBSD || SANITIZER_LINUX
40 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1
41 #else
42 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0
43 #endif
44
45 #if !SANITIZER_MAC
46 # define ASAN_INTERCEPT_STRNLEN 1
47 #else
48 # define ASAN_INTERCEPT_STRNLEN 0
49 #endif
50
51 #if SANITIZER_LINUX && !SANITIZER_ANDROID
52 # define ASAN_INTERCEPT_SWAPCONTEXT 1
53 #else
54 # define ASAN_INTERCEPT_SWAPCONTEXT 0
55 #endif
56
57 #if !SANITIZER_WINDOWS
58 # define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 1
59 #else
60 # define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 0
61 #endif
62
63 #if !SANITIZER_WINDOWS
64 # define ASAN_INTERCEPT_SIGLONGJMP 1
65 #else
66 # define ASAN_INTERCEPT_SIGLONGJMP 0
67 #endif
68
69 // Android bug: https://code.google.com/p/android/issues/detail?id=61799
70 #if ASAN_HAS_EXCEPTIONS && !SANITIZER_WINDOWS && \
71 !(SANITIZER_ANDROID && defined(__i386))
72 # define ASAN_INTERCEPT___CXA_THROW 1
73 #else
74 # define ASAN_INTERCEPT___CXA_THROW 0
75 #endif
76
77 #if !SANITIZER_WINDOWS
78 # define ASAN_INTERCEPT___CXA_ATEXIT 1
79 #else
80 # define ASAN_INTERCEPT___CXA_ATEXIT 0
81 #endif
82
83 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size)
84 DECLARE_REAL(void*, memcpy, void *to, const void *from, uptr size)
85 DECLARE_REAL(void*, memset, void *block, int c, uptr size)
86 DECLARE_REAL(char*, strchr, const char *str, int c)
87 DECLARE_REAL(SIZE_T, strlen, const char *s)
88 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
89 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
90 DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
91 struct sigaction;
DECLARE_REAL(int,sigaction,int signum,const struct sigaction * act,struct sigaction * oldact)92 DECLARE_REAL(int, sigaction, int signum, const struct sigaction *act,
93 struct sigaction *oldact)
94
95 #if !SANITIZER_MAC
96 #define ASAN_INTERCEPT_FUNC(name) \
97 do { \
98 if ((!INTERCEPT_FUNCTION(name) || !REAL(name))) \
99 VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \
100 } while (0)
101 #define ASAN_INTERCEPT_FUNC_VER(name, ver) \
102 do { \
103 if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name))) \
104 VReport( \
105 1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
106 } while (0)
107 #else
108 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION.
109 #define ASAN_INTERCEPT_FUNC(name)
110 #endif // SANITIZER_MAC
111
112 namespace __asan {
113
114 void InitializeAsanInterceptors();
115 void InitializePlatformInterceptors();
116
117 #define ENSURE_ASAN_INITED() do { \
118 CHECK(!asan_init_is_running); \
119 if (UNLIKELY(!asan_inited)) { \
120 AsanInitFromRtl(); \
121 } \
122 } while (0)
123
124 } // namespace __asan
125
126 #endif // ASAN_INTERCEPTORS_H
127