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_INDEX 1 27 # define ASAN_INTERCEPT_PTHREAD_CREATE 1 28 # define ASAN_INTERCEPT_FORK 1 29 #else 30 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0 31 # define ASAN_INTERCEPT__LONGJMP 0 32 # define ASAN_INTERCEPT_INDEX 0 33 # define ASAN_INTERCEPT_PTHREAD_CREATE 0 34 # define ASAN_INTERCEPT_FORK 0 35 #endif 36 37 #if SANITIZER_FREEBSD || SANITIZER_LINUX 38 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1 39 #else 40 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0 41 #endif 42 43 #if SANITIZER_LINUX && !SANITIZER_ANDROID 44 # define ASAN_INTERCEPT_SWAPCONTEXT 1 45 #else 46 # define ASAN_INTERCEPT_SWAPCONTEXT 0 47 #endif 48 49 #if !SANITIZER_WINDOWS 50 # define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 1 51 #else 52 # define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 0 53 #endif 54 55 #if !SANITIZER_WINDOWS 56 # define ASAN_INTERCEPT_SIGLONGJMP 1 57 #else 58 # define ASAN_INTERCEPT_SIGLONGJMP 0 59 #endif 60 61 // Android bug: https://code.google.com/p/android/issues/detail?id=61799 62 #if ASAN_HAS_EXCEPTIONS && !SANITIZER_WINDOWS && \ 63 !(SANITIZER_ANDROID && defined(__i386)) 64 # define ASAN_INTERCEPT___CXA_THROW 1 65 #else 66 # define ASAN_INTERCEPT___CXA_THROW 0 67 #endif 68 69 #if !SANITIZER_WINDOWS 70 # define ASAN_INTERCEPT___CXA_ATEXIT 1 71 #else 72 # define ASAN_INTERCEPT___CXA_ATEXIT 0 73 #endif 74 75 #if SANITIZER_LINUX && !SANITIZER_ANDROID 76 # define ASAN_INTERCEPT___STRDUP 1 77 #else 78 # define ASAN_INTERCEPT___STRDUP 0 79 #endif 80 81 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size) 82 DECLARE_REAL(void*, memcpy, void *to, const void *from, uptr size) 83 DECLARE_REAL(void*, memset, void *block, int c, uptr size) 84 DECLARE_REAL(char*, strchr, const char *str, int c) 85 DECLARE_REAL(SIZE_T, strlen, const char *s) 86 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size) 87 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen) 88 DECLARE_REAL(char*, strstr, const char *s1, const char *s2) 89 struct sigaction; 90 DECLARE_REAL(int, sigaction, int signum, const struct sigaction *act, 91 struct sigaction *oldact) 92 93 #if !SANITIZER_MAC 94 #define ASAN_INTERCEPT_FUNC(name) \ 95 do { \ 96 if ((!INTERCEPT_FUNCTION(name) || !REAL(name))) \ 97 VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \ 98 } while (0) 99 #define ASAN_INTERCEPT_FUNC_VER(name, ver) \ 100 do { \ 101 if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name))) \ 102 VReport( \ 103 1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \ 104 } while (0) 105 #else 106 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION. 107 #define ASAN_INTERCEPT_FUNC(name) 108 #endif // SANITIZER_MAC 109 110 namespace __asan { 111 112 void InitializeAsanInterceptors(); 113 void InitializePlatformInterceptors(); 114 115 #define ENSURE_ASAN_INITED() do { \ 116 CHECK(!asan_init_is_running); \ 117 if (UNLIKELY(!asan_inited)) { \ 118 AsanInitFromRtl(); \ 119 } \ 120 } while (0) 121 122 } // namespace __asan 123 124 #endif // ASAN_INTERCEPTORS_H 125
