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; 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
