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 83DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size) 84DECLARE_REAL(void*, memcpy, void *to, const void *from, uptr size) 85DECLARE_REAL(void*, memset, void *block, int c, uptr size) 86DECLARE_REAL(char*, strchr, const char *str, int c) 87DECLARE_REAL(SIZE_T, strlen, const char *s) 88DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size) 89DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen) 90DECLARE_REAL(char*, strstr, const char *s1, const char *s2) 91struct sigaction; 92DECLARE_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 112namespace __asan { 113 114void InitializeAsanInterceptors(); 115void 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