libsanitizer/asan/asan_interceptors.h

   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 # if ! defined(ASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION) \
  85      || ASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION
  86 #   define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 1
  87 # else
  88 #   define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 0
  89 # endif
  90 # if defined(_GLIBCXX_SJLJ_EXCEPTIONS) || (SANITIZER_IOS && defined(__arm__))
  91 #  define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 1
  92 # else
  93 #  define ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION 1
  94 # endif
  95 #else
  96 # define ASAN_INTERCEPT___CXA_THROW 0
  97 # define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 0
  98 # define ASAN_INTERCEPT__UNWIND_RAISEEXCEPTION 0
  99 # define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 0
 100 #endif
 101
 102 #if !SANITIZER_WINDOWS
 103 # define ASAN_INTERCEPT___CXA_ATEXIT 1
 104 #else
 105 # define ASAN_INTERCEPT___CXA_ATEXIT 0
 106 #endif
 107
 108 #if SANITIZER_NETBSD
 109 # define ASAN_INTERCEPT_ATEXIT 1
 110 #else
 111 # define ASAN_INTERCEPT_ATEXIT 0
 112 #endif
 113
 114 #if SANITIZER_GLIBC
 115 # define ASAN_INTERCEPT___STRDUP 1
 116 #else
 117 # define ASAN_INTERCEPT___STRDUP 0
 118 #endif
 119
 120 #if SANITIZER_LINUX &&                                                \
 121     (defined(__arm__) || defined(__aarch64__) || defined(__i386__) || \
 122      defined(__x86_64__) || SANITIZER_RISCV64)
 123 # define ASAN_INTERCEPT_VFORK 1
 124 #else
 125 # define ASAN_INTERCEPT_VFORK 0
 126 #endif
 127
 128 #if SANITIZER_NETBSD
 129 # define ASAN_INTERCEPT_PTHREAD_ATFORK 1
 130 #else
 131 # define ASAN_INTERCEPT_PTHREAD_ATFORK 0
 132 #endif
 133
 134 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size)
 135 DECLARE_REAL(char*, strchr, const char *str, int c)
 136 DECLARE_REAL(SIZE_T, strlen, const char *s)
 137 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
 138 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
 139 DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
 140
 141 #  if !SANITIZER_MAC
 142 #    define ASAN_INTERCEPT_FUNC(name)                                        \
 143       do {                                                                   \
 144         if (!INTERCEPT_FUNCTION(name))                                       \
 145           VReport(1, "AddressSanitizer: failed to intercept '%s'\n", #name); \
 146       } while (0)
 147 #    define ASAN_INTERCEPT_FUNC_VER(name, ver)                           \
 148       do {                                                               \
 149         if (!INTERCEPT_FUNCTION_VER(name, ver))                          \
 150           VReport(1, "AddressSanitizer: failed to intercept '%s@@%s'\n", \
 151                   #name, ver);                                           \
 152       } while (0)
 153 #    define ASAN_INTERCEPT_FUNC_VER_UNVERSIONED_FALLBACK(name, ver)           \
 154       do {                                                                    \
 155         if (!INTERCEPT_FUNCTION_VER(name, ver) && !INTERCEPT_FUNCTION(name))  \
 156           VReport(1,                                                          \
 157                   "AddressSanitizer: failed to intercept '%s@@%s' or '%s'\n", \
 158                   #name, ver, #name);                                         \
 159       } while (0)
 160
 161 #  else
 162 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION.
 163 #    define ASAN_INTERCEPT_FUNC(name)
 164 #  endif  // SANITIZER_MAC
 165
 166 #endif  // !SANITIZER_FUCHSIA
 167
 168 #endif  // ASAN_INTERCEPTORS_H