libsanitizer/asan/asan_internal.h

   1 //===-- asan_internal.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 which defines various general utilities.
  11 //===----------------------------------------------------------------------===//
  12 #ifndef ASAN_INTERNAL_H
  13 #define ASAN_INTERNAL_H
  14
  15 #include "asan_flags.h"
  16 #include "asan_interface_internal.h"
  17 #include "sanitizer_common/sanitizer_common.h"
  18 #include "sanitizer_common/sanitizer_internal_defs.h"
  19 #include "sanitizer_common/sanitizer_stacktrace.h"
  20 #include "sanitizer_common/sanitizer_libc.h"
  21
  22 #if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
  23 # error "The AddressSanitizer run-time should not be"
  24         " instrumented by AddressSanitizer"
  25 #endif
  26
  27 // Build-time configuration options.
  28
  29 // If set, asan will intercept C++ exception api call(s).
  30 #ifndef ASAN_HAS_EXCEPTIONS
  31 # define ASAN_HAS_EXCEPTIONS 1
  32 #endif
  33
  34 // If set, values like allocator chunk size, as well as defaults for some flags
  35 // will be changed towards less memory overhead.
  36 #ifndef ASAN_LOW_MEMORY
  37 #if SANITIZER_WORDSIZE == 32
  38 #  define ASAN_LOW_MEMORY 1
  39 #else
  40 #  define ASAN_LOW_MEMORY 0
  41 # endif
  42 #endif
  43
  44 #ifndef ASAN_DYNAMIC
  45 # ifdef PIC
  46 #  define ASAN_DYNAMIC 1
  47 # else
  48 #  define ASAN_DYNAMIC 0
  49 # endif
  50 #endif
  51
  52 // All internal functions in asan reside inside the __asan namespace
  53 // to avoid namespace collisions with the user programs.
  54 // Separate namespace also makes it simpler to distinguish the asan run-time
  55 // functions from the instrumented user code in a profile.
  56 namespace __asan {
  57
  58 class AsanThread;
  59 using __sanitizer::StackTrace;
  60
  61 void AsanInitFromRtl();
  62
  63 // asan_rtl.cc
  64 void NORETURN ShowStatsAndAbort();
  65
  66 // asan_malloc_linux.cc / asan_malloc_mac.cc
  67 void ReplaceSystemMalloc();
  68
  69 // asan_linux.cc / asan_mac.cc / asan_win.cc
  70 void *AsanDoesNotSupportStaticLinkage();
  71 void AsanCheckDynamicRTPrereqs();
  72 void AsanCheckIncompatibleRT();
  73
  74 void AsanOnDeadlySignal(int, void *siginfo, void *context);
  75
  76 void DisableReexec();
  77 void MaybeReexec();
  78 void ReadContextStack(void *context, uptr *stack, uptr *ssize);
  79 void StopInitOrderChecking();
  80
  81 // Wrapper for TLS/TSD.
  82 void AsanTSDInit(void (*destructor)(void *tsd));
  83 void *AsanTSDGet();
  84 void AsanTSDSet(void *tsd);
  85 void PlatformTSDDtor(void *tsd);
  86
  87 void AppendToErrorMessageBuffer(const char *buffer);
  88
  89 void *AsanDlSymNext(const char *sym);
  90
  91 void ReserveShadowMemoryRange(uptr beg, uptr end, const char *name);
  92
  93 // Platform-specific options.
  94 #if SANITIZER_MAC
  95 bool PlatformHasDifferentMemcpyAndMemmove();
  96 # define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE \
  97     (PlatformHasDifferentMemcpyAndMemmove())
  98 #else
  99 # define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE true
 100 #endif  // SANITIZER_MAC
 101
 102 // Add convenient macro for interface functions that may be represented as
 103 // weak hooks.
 104 #define ASAN_MALLOC_HOOK(ptr, size) \
 105   if (&__sanitizer_malloc_hook) __sanitizer_malloc_hook(ptr, size)
 106 #define ASAN_FREE_HOOK(ptr) \
 107   if (&__sanitizer_free_hook) __sanitizer_free_hook(ptr)
 108 #define ASAN_ON_ERROR() \
 109   if (&__asan_on_error) __asan_on_error()
 110
 111 extern int asan_inited;
 112 // Used to avoid infinite recursion in __asan_init().
 113 extern bool asan_init_is_running;
 114 extern void (*death_callback)(void);
 115
 116 // These magic values are written to shadow for better error reporting.
 117 const int kAsanHeapLeftRedzoneMagic = 0xfa;
 118 const int kAsanHeapRightRedzoneMagic = 0xfb;
 119 const int kAsanHeapFreeMagic = 0xfd;
 120 const int kAsanStackLeftRedzoneMagic = 0xf1;
 121 const int kAsanStackMidRedzoneMagic = 0xf2;
 122 const int kAsanStackRightRedzoneMagic = 0xf3;
 123 const int kAsanStackPartialRedzoneMagic = 0xf4;
 124 const int kAsanStackAfterReturnMagic = 0xf5;
 125 const int kAsanInitializationOrderMagic = 0xf6;
 126 const int kAsanUserPoisonedMemoryMagic = 0xf7;
 127 const int kAsanContiguousContainerOOBMagic = 0xfc;
 128 const int kAsanStackUseAfterScopeMagic = 0xf8;
 129 const int kAsanGlobalRedzoneMagic = 0xf9;
 130 const int kAsanInternalHeapMagic = 0xfe;
 131 const int kAsanArrayCookieMagic = 0xac;
 132 const int kAsanIntraObjectRedzone = 0xbb;
 133 const int kAsanAllocaLeftMagic = 0xca;
 134 const int kAsanAllocaRightMagic = 0xcb;
 135
 136 static const uptr kCurrentStackFrameMagic = 0x41B58AB3;
 137 static const uptr kRetiredStackFrameMagic = 0x45E0360E;
 138
 139 }  // namespace __asan
 140
 141 #endif  // ASAN_INTERNAL_H