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 22namespace __asan { 23 24void InitializeAsanInterceptors(); 25void InitializePlatformInterceptors(); 26 27} // namespace __asan 28 29// There is no general interception at all on Fuchsia. 30// Only the functions in asan_interceptors_memintrinsics.h are 31// really defined to replace libc functions. 32#if !SANITIZER_FUCHSIA 33 34// Use macro to describe if specific function should be 35// intercepted on a given platform. 36#if !SANITIZER_WINDOWS 37# define ASAN_INTERCEPT__LONGJMP 1 38# define ASAN_INTERCEPT_INDEX 1 39# define ASAN_INTERCEPT_PTHREAD_CREATE 1 40#else 41# define ASAN_INTERCEPT__LONGJMP 0 42# define ASAN_INTERCEPT_INDEX 0 43# define ASAN_INTERCEPT_PTHREAD_CREATE 0 44#endif 45 46#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD || \ 47 SANITIZER_SOLARIS 48# define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1 49#else 50# define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0 51#endif 52 53#if SANITIZER_GLIBC || SANITIZER_SOLARIS 54# define ASAN_INTERCEPT_SWAPCONTEXT 1 55#else 56# define ASAN_INTERCEPT_SWAPCONTEXT 0 57#endif 58 59#if !SANITIZER_WINDOWS 60# define ASAN_INTERCEPT_SIGLONGJMP 1 61#else 62# define ASAN_INTERCEPT_SIGLONGJMP 0 63#endif 64 65#if SANITIZER_GLIBC 66# define ASAN_INTERCEPT___LONGJMP_CHK 1 67#else 68# define ASAN_INTERCEPT___LONGJMP_CHK 0 69#endif 70 71#if ASAN_HAS_EXCEPTIONS && !SANITIZER_SOLARIS && !SANITIZER_NETBSD && \ 72 (!SANITIZER_WINDOWS || (defined(__MINGW32__) && defined(__i386__))) 73# define ASAN_INTERCEPT___CXA_THROW 1 74# define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 1 75# if defined(_GLIBCXX_SJLJ_EXCEPTIONS) || (SANITIZER_IOS && defined(__arm__)) 76# define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 1 77# else 78# define ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION 1 79# endif 80#else 81# define ASAN_INTERCEPT___CXA_THROW 0 82# define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 0 83# define ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION 0 84# define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 0 85#endif 86 87#if !SANITIZER_WINDOWS 88# define ASAN_INTERCEPT___CXA_ATEXIT 1 89#else 90# define ASAN_INTERCEPT___CXA_ATEXIT 0 91#endif 92 93#if SANITIZER_NETBSD 94# define ASAN_INTERCEPT_ATEXIT 1 95#else 96# define ASAN_INTERCEPT_ATEXIT 0 97#endif 98 99#if SANITIZER_GLIBC 100# define ASAN_INTERCEPT___STRDUP 1 101#else 102# define ASAN_INTERCEPT___STRDUP 0 103#endif 104 105#if SANITIZER_GLIBC && ASAN_INTERCEPT_PTHREAD_CREATE 106# define ASAN_INTERCEPT_TIMEDJOIN 1 107# define ASAN_INTERCEPT_TRYJOIN 1 108#else 109# define ASAN_INTERCEPT_TIMEDJOIN 0 110# define ASAN_INTERCEPT_TRYJOIN 0 111#endif 112 113#if SANITIZER_LINUX && \ 114 (defined(__arm__) || defined(__aarch64__) || defined(__i386__) || \ 115 defined(__x86_64__) || SANITIZER_RISCV64 || SANITIZER_LOONGARCH64) 116# define ASAN_INTERCEPT_VFORK 1 117#else 118# define ASAN_INTERCEPT_VFORK 0 119#endif 120 121#if SANITIZER_NETBSD 122# define ASAN_INTERCEPT_PTHREAD_ATFORK 1 123#else 124# define ASAN_INTERCEPT_PTHREAD_ATFORK 0 125#endif 126 127DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size) 128DECLARE_REAL(char*, strchr, const char *str, int c) 129DECLARE_REAL(SIZE_T, strlen, const char *s) 130DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size) 131DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen) 132DECLARE_REAL(char*, strstr, const char *s1, const char *s2) 133 134# if !SANITIZER_APPLE 135# define ASAN_INTERCEPT_FUNC(name) \ 136 do { \ 137 if (!INTERCEPT_FUNCTION(name)) \ 138 VReport(1, "AddressSanitizer: failed to intercept '%s'\n", #name); \ 139 } while (0) 140# define ASAN_INTERCEPT_FUNC_VER(name, ver) \ 141 do { \ 142 if (!INTERCEPT_FUNCTION_VER(name, ver)) \ 143 VReport(1, "AddressSanitizer: failed to intercept '%s@@%s'\n", \ 144 #name, ver); \ 145 } while (0) 146# define ASAN_INTERCEPT_FUNC_VER_UNVERSIONED_FALLBACK(name, ver) \ 147 do { \ 148 if (!INTERCEPT_FUNCTION_VER(name, ver) && !INTERCEPT_FUNCTION(name)) \ 149 VReport(1, \ 150 "AddressSanitizer: failed to intercept '%s@@%s' or '%s'\n", \ 151 #name, ver, #name); \ 152 } while (0) 153 154# else 155// OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION. 156# define ASAN_INTERCEPT_FUNC(name) 157# endif // SANITIZER_APPLE 158 159#define ASAN_INTERCEPTOR_ENTER(ctx, func) \ 160 AsanInterceptorContext _ctx = {#func}; \ 161 ctx = (void *)&_ctx; \ 162 (void) ctx; 163#define COMMON_INTERCEPT_FUNCTION(name) ASAN_INTERCEPT_FUNC(name) 164 165#endif // !SANITIZER_FUCHSIA 166 167#endif // ASAN_INTERCEPTORS_H 168