1 //===-- asan_interceptors.h -------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of AddressSanitizer, an address sanity checker. 10 // 11 // ASan-private header for asan_interceptors.cpp 12 //===----------------------------------------------------------------------===// 13 #ifndef ASAN_INTERCEPTORS_H 14 #define ASAN_INTERCEPTORS_H 15 16 #include "asan_interceptors_memintrinsics.h" 17 #include "asan_internal.h" 18 #include "interception/interception.h" 19 #include "sanitizer_common/sanitizer_platform.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. 38 // Only the functions in asan_interceptors_memintrinsics.h are 39 // really defined to replace libc functions. 40 #if !SANITIZER_FUCHSIA 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_GLIBC || 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_GLIBC 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_NETBSD 104 # define ASAN_INTERCEPT_ATEXIT 1 105 #else 106 # define ASAN_INTERCEPT_ATEXIT 0 107 #endif 108 109 #if SANITIZER_GLIBC 110 # define ASAN_INTERCEPT___STRDUP 1 111 #else 112 # define ASAN_INTERCEPT___STRDUP 0 113 #endif 114 115 #if SANITIZER_LINUX && \ 116 (defined(__arm__) || defined(__aarch64__) || defined(__i386__) || \ 117 defined(__x86_64__) || SANITIZER_RISCV64) 118 # define ASAN_INTERCEPT_VFORK 1 119 #else 120 # define ASAN_INTERCEPT_VFORK 0 121 #endif 122 123 #if SANITIZER_NETBSD 124 # define ASAN_INTERCEPT_PTHREAD_ATFORK 1 125 #else 126 # define ASAN_INTERCEPT_PTHREAD_ATFORK 0 127 #endif 128 129 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size) 130 DECLARE_REAL(char*, strchr, const char *str, int c) 131 DECLARE_REAL(SIZE_T, strlen, const char *s) 132 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size) 133 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen) 134 DECLARE_REAL(char*, strstr, const char *s1, const char *s2) 135 136 # if !SANITIZER_MAC 137 # define ASAN_INTERCEPT_FUNC(name) \ 138 do { \ 139 if (!INTERCEPT_FUNCTION(name)) \ 140 VReport(1, "AddressSanitizer: failed to intercept '%s'\n", #name); \ 141 } while (0) 142 # define ASAN_INTERCEPT_FUNC_VER(name, ver) \ 143 do { \ 144 if (!INTERCEPT_FUNCTION_VER(name, ver)) \ 145 VReport(1, "AddressSanitizer: failed to intercept '%s@@%s'\n", \ 146 #name, ver); \ 147 } while (0) 148 # define ASAN_INTERCEPT_FUNC_VER_UNVERSIONED_FALLBACK(name, ver) \ 149 do { \ 150 if (!INTERCEPT_FUNCTION_VER(name, ver) && !INTERCEPT_FUNCTION(name)) \ 151 VReport(1, \ 152 "AddressSanitizer: failed to intercept '%s@@%s' or '%s'\n", \ 153 #name, ver, #name); \ 154 } while (0) 155 156 # else 157 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION. 158 # define ASAN_INTERCEPT_FUNC(name) 159 # endif // SANITIZER_MAC 160 161 #endif // !SANITIZER_FUCHSIA 162 163 #endif // ASAN_INTERCEPTORS_H 164