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      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 "asan_interceptors_memintrinsics.h"
     19 #include "interception/interception.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 and RTEMS.
     38 // Only the functions in asan_interceptors_memintrinsics.h are
     39 // really defined to replace libc functions.
     40 #if !SANITIZER_FUCHSIA && !SANITIZER_RTEMS
     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_LINUX && !SANITIZER_ANDROID) || 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_LINUX && !SANITIZER_ANDROID
     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_LINUX && !SANITIZER_ANDROID
    104 # define ASAN_INTERCEPT___STRDUP 1
    105 #else
    106 # define ASAN_INTERCEPT___STRDUP 0
    107 #endif
    108 
    109 DECLARE_REAL(int, memcmp, const void *a1, const void *a2, uptr size)
    110 DECLARE_REAL(char*, strchr, const char *str, int c)
    111 DECLARE_REAL(SIZE_T, strlen, const char *s)
    112 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
    113 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
    114 DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
    115 
    116 #if !SANITIZER_MAC
    117 #define ASAN_INTERCEPT_FUNC(name)                                        \
    118   do {                                                                   \
    119     if ((!INTERCEPT_FUNCTION(name) || !REAL(name)))                      \
    120       VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \
    121   } while (0)
    122 #define ASAN_INTERCEPT_FUNC_VER(name, ver)                                     \
    123   do {                                                                         \
    124     if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name)))                   \
    125       VReport(                                                                 \
    126           1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
    127   } while (0)
    128 #else
    129 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION.
    130 #define ASAN_INTERCEPT_FUNC(name)
    131 #endif  // SANITIZER_MAC
    132 
    133 #endif  // !SANITIZER_FUCHSIA
    134 
    135 #endif  // ASAN_INTERCEPTORS_H
    136