contrib/compiler-rt/lib/asan/asan_interceptors.h

   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_INDEX 1
  27 # define ASAN_INTERCEPT_PTHREAD_CREATE 1
  28 # define ASAN_INTERCEPT_FORK 1
  29 #else
  30 # define ASAN_INTERCEPT_ATOLL_AND_STRTOLL 0
  31 # define ASAN_INTERCEPT__LONGJMP 0
  32 # define ASAN_INTERCEPT_INDEX 0
  33 # define ASAN_INTERCEPT_PTHREAD_CREATE 0
  34 # define ASAN_INTERCEPT_FORK 0
  35 #endif
  36
  37 #if SANITIZER_FREEBSD || SANITIZER_LINUX
  38 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 1
  39 #else
  40 # define ASAN_USE_ALIAS_ATTRIBUTE_FOR_INDEX 0
  41 #endif
  42
  43 #if SANITIZER_LINUX && !SANITIZER_ANDROID
  44 # define ASAN_INTERCEPT_SWAPCONTEXT 1
  45 #else
  46 # define ASAN_INTERCEPT_SWAPCONTEXT 0
  47 #endif
  48
  49 #if !SANITIZER_WINDOWS
  50 # define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 1
  51 #else
  52 # define ASAN_INTERCEPT_SIGNAL_AND_SIGACTION 0
  53 #endif
  54
  55 #if !SANITIZER_WINDOWS
  56 # define ASAN_INTERCEPT_SIGLONGJMP 1
  57 #else
  58 # define ASAN_INTERCEPT_SIGLONGJMP 0
  59 #endif
  60
  61 // Android bug: https://code.google.com/p/android/issues/detail?id=61799
  62 #if ASAN_HAS_EXCEPTIONS && !SANITIZER_WINDOWS && \
  63     !(SANITIZER_ANDROID && defined(__i386))
  64 # define ASAN_INTERCEPT___CXA_THROW 1
  65 #else
  66 # define ASAN_INTERCEPT___CXA_THROW 0
  67 #endif
  68
  69 #if !SANITIZER_WINDOWS
  70 # define ASAN_INTERCEPT___CXA_ATEXIT 1
  71 #else
  72 # define ASAN_INTERCEPT___CXA_ATEXIT 0
  73 #endif
  74
  75 #if SANITIZER_LINUX && !SANITIZER_ANDROID
  76 # define ASAN_INTERCEPT___STRDUP 1
  77 #else
  78 # define ASAN_INTERCEPT___STRDUP 0
  79 #endif
  80
  81 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size)
  82 DECLARE_REAL(void*, memcpy, void *to, const void *from, uptr size)
  83 DECLARE_REAL(void*, memset, void *block, int c, uptr size)
  84 DECLARE_REAL(char*, strchr, const char *str, int c)
  85 DECLARE_REAL(SIZE_T, strlen, const char *s)
  86 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
  87 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
  88 DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
  89 struct sigaction;
  90 DECLARE_REAL(int, sigaction, int signum, const struct sigaction *act,
  91                              struct sigaction *oldact)
  92
  93 #if !SANITIZER_MAC
  94 #define ASAN_INTERCEPT_FUNC(name)                                        \
  95   do {                                                                   \
  96     if ((!INTERCEPT_FUNCTION(name) || !REAL(name)))                      \
  97       VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \
  98   } while (0)
  99 #define ASAN_INTERCEPT_FUNC_VER(name, ver)                                     \
 100   do {                                                                         \
 101     if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name)))                   \
 102       VReport(                                                                 \
 103           1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
 104   } while (0)
 105 #else
 106 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION.
 107 #define ASAN_INTERCEPT_FUNC(name)
 108 #endif  // SANITIZER_MAC
 109
 110 namespace __asan {
 111
 112 void InitializeAsanInterceptors();
 113 void InitializePlatformInterceptors();
 114
 115 #define ENSURE_ASAN_INITED() do { \
 116   CHECK(!asan_init_is_running); \
 117   if (UNLIKELY(!asan_inited)) { \
 118     AsanInitFromRtl(); \
 119   } \
 120 } while (0)
 121
 122 }  // namespace __asan
 123
 124 #endif  // ASAN_INTERCEPTORS_H