libsanitizer/asan/asan_interceptors.h

   1 //===-- asan_interceptors.h -------------------------------------*- C++ -*-===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of AddressSanitizer, an address sanity checker.
   9 //
  10 // ASan-private header for asan_interceptors.cc
  11 //===----------------------------------------------------------------------===//
  12 #ifndef ASAN_INTERCEPTORS_H
  13 #define ASAN_INTERCEPTORS_H
  14
  15 #include "asan_internal.h"
  16 #include "asan_interceptors_memintrinsics.h"
  17 #include "interception/interception.h"
  18 #include "sanitizer_common/sanitizer_platform_interceptors.h"
  19
  20 namespace __asan {
  21
  22 void InitializeAsanInterceptors();
  23 void InitializePlatformInterceptors();
  24
  25 #define ENSURE_ASAN_INITED()      \
  26   do {                            \
  27     CHECK(!asan_init_is_running); \
  28     if (UNLIKELY(!asan_inited)) { \
  29       AsanInitFromRtl();          \
  30     }                             \
  31   } while (0)
  32
  33 }  // namespace __asan
  34
  35 // There is no general interception at all on Fuchsia.
  36 // Only the functions in asan_interceptors_memintrinsics.h are
  37 // really defined to replace libc functions.
  38 #if !SANITIZER_FUCHSIA
  39
  40 // Use macro to describe if specific function should be
  41 // intercepted on a given platform.
  42 #if !SANITIZER_WINDOWS
  43 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 1
  44 # define ASAN_INTERCEPT__LONGJMP 1
  45 # define ASAN_INTERCEPT_INDEX 1
  46 # define ASAN_INTERCEPT_PTHREAD_CREATE 1
  47 # define ASAN_INTERCEPT_FORK 1
  48 #else
  49 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0
  50 # define ASAN_INTERCEPT__LONGJMP 0
  51 # define ASAN_INTERCEPT_INDEX 0
  52 # define ASAN_INTERCEPT_PTHREAD_CREATE 0
  53 # define ASAN_INTERCEPT_FORK 0
  54 #endif
  55
  56 #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD
  57 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1
  58 #else
  59 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0
  60 #endif
  61
  62 #if SANITIZER_LINUX && !SANITIZER_ANDROID
  63 # define ASAN_INTERCEPT_SWAPCONTEXT 1
  64 #else
  65 # define ASAN_INTERCEPT_SWAPCONTEXT 0
  66 #endif
  67
  68 #if !SANITIZER_WINDOWS
  69 # define ASAN_INTERCEPT_SIGLONGJMP 1
  70 #else
  71 # define ASAN_INTERCEPT_SIGLONGJMP 0
  72 #endif
  73
  74 #if SANITIZER_LINUX && !SANITIZER_ANDROID
  75 # define ASAN_INTERCEPT___LONGJMP_CHK 1
  76 #else
  77 # define ASAN_INTERCEPT___LONGJMP_CHK 0
  78 #endif
  79
  80 // Android bug: https://code.google.com/p/android/issues/detail?id=61799
  81 #if ASAN_HAS_EXCEPTIONS && !SANITIZER_WINDOWS && \
  82     !(SANITIZER_ANDROID && defined(__i386))
  83 # define ASAN_INTERCEPT___CXA_THROW 1
  84 #else
  85 # define ASAN_INTERCEPT___CXA_THROW 0
  86 #endif
  87
  88 #if !SANITIZER_WINDOWS
  89 # define ASAN_INTERCEPT___CXA_ATEXIT 1
  90 #else
  91 # define ASAN_INTERCEPT___CXA_ATEXIT 0
  92 #endif
  93
  94 #if SANITIZER_LINUX && !SANITIZER_ANDROID
  95 # define ASAN_INTERCEPT___STRDUP 1
  96 #else
  97 # define ASAN_INTERCEPT___STRDUP 0
  98 #endif
  99
 100 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size)
 101 DECLARE_REAL(char*, strchr, const char *str, int c)
 102 DECLARE_REAL(SIZE_T, strlen, const char *s)
 103 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
 104 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
 105 DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
 106 struct sigaction;
 107 DECLARE_REAL(int, sigaction, int signum, const struct sigaction *act,
 108                              struct sigaction *oldact)
 109
 110 #if !SANITIZER_MAC
 111 #define ASAN_INTERCEPT_FUNC(name)                                        \
 112   do {                                                                   \
 113     if ((!INTERCEPT_FUNCTION(name) || !REAL(name)))                      \
 114       VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \
 115   } while (0)
 116 #define ASAN_INTERCEPT_FUNC_VER(name, ver)                                     \
 117   do {                                                                         \
 118     if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name)))                   \
 119       VReport(                                                                 \
 120           1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
 121   } while (0)
 122 #else
 123 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION.
 124 #define ASAN_INTERCEPT_FUNC(name)
 125 #endif  // SANITIZER_MAC
 126
 127 #endif  // !SANITIZER_FUCHSIA
 128
 129 #endif  // ASAN_INTERCEPTORS_H