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 "asan_interceptors_memintrinsics.h" 19 #include "interception/interception.h" 20 #include "sanitizer_common/sanitizer_platform_interceptors.h" 21 22 namespace __asan { 23 24 void InitializeAsanInterceptors(); 25 void InitializePlatformInterceptors(); 26 27 #define ENSURE_ASAN_INITED() \ 28 do { \ 29 CHECK(!asan_init_is_running); \ 30 if (UNLIKELY(!asan_inited)) { \ 31 AsanInitFromRtl(); \ 32 } \ 33 } while (0) 34 35 } // namespace __asan 36 37 // There is no general interception at all on Fuchsia and RTEMS. 38 // Only the functions in asan_interceptors_memintrinsics.h are 39 // really defined to replace libc functions. 40 #if !SANITIZER_FUCHSIA && !SANITIZER_RTEMS 41 42 // Use macro to describe if specific function should be 43 // intercepted on a given platform. 44 #if !SANITIZER_WINDOWS 45 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 1 46 # define ASAN_INTERCEPT__LONGJMP 1 47 # define ASAN_INTERCEPT_INDEX 1 48 # define ASAN_INTERCEPT_PTHREAD_CREATE 1 49 #else 50 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0 51 # define ASAN_INTERCEPT__LONGJMP 0 52 # define ASAN_INTERCEPT_INDEX 0 53 # define ASAN_INTERCEPT_PTHREAD_CREATE 0 54 #endif 55 56 #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD || \ 57 SANITIZER_SOLARIS 58 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1 59 #else 60 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0 61 #endif 62 63 #if (SANITIZER_LINUX && !SANITIZER_ANDROID) || SANITIZER_SOLARIS 64 # define ASAN_INTERCEPT_SWAPCONTEXT 1 65 #else 66 # define ASAN_INTERCEPT_SWAPCONTEXT 0 67 #endif 68 69 #if !SANITIZER_WINDOWS 70 # define ASAN_INTERCEPT_SIGLONGJMP 1 71 #else 72 # define ASAN_INTERCEPT_SIGLONGJMP 0 73 #endif 74 75 #if SANITIZER_LINUX && !SANITIZER_ANDROID 76 # define ASAN_INTERCEPT___LONGJMP_CHK 1 77 #else 78 # define ASAN_INTERCEPT___LONGJMP_CHK 0 79 #endif 80 81 #if ASAN_HAS_EXCEPTIONS && !SANITIZER_WINDOWS && !SANITIZER_SOLARIS && \ 82 !SANITIZER_NETBSD 83 # define ASAN_INTERCEPT___CXA_THROW 1 84 # define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 1 85 # if defined(_GLIBCXX_SJLJ_EXCEPTIONS) || (SANITIZER_IOS && defined(__arm__)) 86 # define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 1 87 # else 88 # define ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION 1 89 # endif 90 #else 91 # define ASAN_INTERCEPT___CXA_THROW 0 92 # define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 0 93 # define ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION 0 94 # define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 0 95 #endif 96 97 #if !SANITIZER_WINDOWS 98 # define ASAN_INTERCEPT___CXA_ATEXIT 1 99 #else 100 # define ASAN_INTERCEPT___CXA_ATEXIT 0 101 #endif 102 103 #if SANITIZER_LINUX && !SANITIZER_ANDROID 104 # define ASAN_INTERCEPT___STRDUP 1 105 #else 106 # define ASAN_INTERCEPT___STRDUP 0 107 #endif 108 109 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size) 110 DECLARE_REAL(char*, strchr, const char *str, int c) 111 DECLARE_REAL(SIZE_T, strlen, const char *s) 112 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size) 113 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen) 114 DECLARE_REAL(char*, strstr, const char *s1, const char *s2) 115 116 #if !SANITIZER_MAC 117 #define ASAN_INTERCEPT_FUNC(name) \ 118 do { \ 119 if ((!INTERCEPT_FUNCTION(name) || !REAL(name))) \ 120 VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \ 121 } while (0) 122 #define ASAN_INTERCEPT_FUNC_VER(name, ver) \ 123 do { \ 124 if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name))) \ 125 VReport( \ 126 1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \ 127 } while (0) 128 #else 129 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION. 130 #define ASAN_INTERCEPT_FUNC(name) 131 #endif // SANITIZER_MAC 132 133 #endif // !SANITIZER_FUCHSIA 134 135 #endif // ASAN_INTERCEPTORS_H 136