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//===-- asan_internal.h -----------------------------------------*- C++ -*-===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// ASan-private header which defines various general utilities.
//===----------------------------------------------------------------------===//
#ifndef ASAN_INTERNAL_H
#define ASAN_INTERNAL_H
#include "asan_flags.h"
#include "asan_interface_internal.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
#include "sanitizer_common/sanitizer_libc.h"
#define ASAN_DEFAULT_FAILURE_EXITCODE 1
#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
# error "The AddressSanitizer run-time should not be"
" instrumented by AddressSanitizer"
#endif
// Build-time configuration options.
// If set, asan will install its own SEGV signal handler.
#ifndef ASAN_NEEDS_SEGV
# if SANITIZER_ANDROID == 1
# define ASAN_NEEDS_SEGV 0
# else
# define ASAN_NEEDS_SEGV 1
# endif
#endif
// If set, asan will intercept C++ exception api call(s).
#ifndef ASAN_HAS_EXCEPTIONS
# define ASAN_HAS_EXCEPTIONS 1
#endif
// If set, asan uses the values of SHADOW_SCALE and SHADOW_OFFSET
// provided by the instrumented objects. Otherwise constants are used.
#ifndef ASAN_FLEXIBLE_MAPPING_AND_OFFSET
# define ASAN_FLEXIBLE_MAPPING_AND_OFFSET 0
#endif
// If set, values like allocator chunk size, as well as defaults for some flags
// will be changed towards less memory overhead.
#ifndef ASAN_LOW_MEMORY
#if SANITIZER_WORDSIZE == 32
# define ASAN_LOW_MEMORY 1
#else
# define ASAN_LOW_MEMORY 0
# endif
#endif
#ifndef ASAN_USE_PREINIT_ARRAY
# define ASAN_USE_PREINIT_ARRAY (SANITIZER_LINUX && !SANITIZER_ANDROID)
#endif
// All internal functions in asan reside inside the __asan namespace
// to avoid namespace collisions with the user programs.
// Seperate namespace also makes it simpler to distinguish the asan run-time
// functions from the instrumented user code in a profile.
namespace __asan {
class AsanThread;
using __sanitizer::StackTrace;
// asan_rtl.cc
void NORETURN ShowStatsAndAbort();
void ReplaceOperatorsNewAndDelete();
// asan_malloc_linux.cc / asan_malloc_mac.cc
void ReplaceSystemMalloc();
// asan_linux.cc / asan_mac.cc / asan_win.cc
void *AsanDoesNotSupportStaticLinkage();
void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp);
void MaybeReexec();
bool AsanInterceptsSignal(int signum);
void SetAlternateSignalStack();
void UnsetAlternateSignalStack();
void InstallSignalHandlers();
void ReadContextStack(void *context, uptr *stack, uptr *ssize);
void AsanPlatformThreadInit();
void StopInitOrderChecking();
// Wrapper for TLS/TSD.
void AsanTSDInit(void (*destructor)(void *tsd));
void *AsanTSDGet();
void AsanTSDSet(void *tsd);
void PlatformTSDDtor(void *tsd);
void AppendToErrorMessageBuffer(const char *buffer);
// Platfrom-specific options.
#if SANITIZER_MAC
bool PlatformHasDifferentMemcpyAndMemmove();
# define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE \
(PlatformHasDifferentMemcpyAndMemmove())
#else
# define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE true
#endif // SANITIZER_MAC
// Add convenient macro for interface functions that may be represented as
// weak hooks.
#define ASAN_MALLOC_HOOK(ptr, size) \
if (&__asan_malloc_hook) __asan_malloc_hook(ptr, size)
#define ASAN_FREE_HOOK(ptr) \
if (&__asan_free_hook) __asan_free_hook(ptr)
#define ASAN_ON_ERROR() \
if (&__asan_on_error) __asan_on_error()
extern int asan_inited;
// Used to avoid infinite recursion in __asan_init().
extern bool asan_init_is_running;
extern void (*death_callback)(void);
// These magic values are written to shadow for better error reporting.
const int kAsanHeapLeftRedzoneMagic = 0xfa;
const int kAsanHeapRightRedzoneMagic = 0xfb;
const int kAsanHeapFreeMagic = 0xfd;
const int kAsanStackLeftRedzoneMagic = 0xf1;
const int kAsanStackMidRedzoneMagic = 0xf2;
const int kAsanStackRightRedzoneMagic = 0xf3;
const int kAsanStackPartialRedzoneMagic = 0xf4;
const int kAsanStackAfterReturnMagic = 0xf5;
const int kAsanInitializationOrderMagic = 0xf6;
const int kAsanUserPoisonedMemoryMagic = 0xf7;
const int kAsanContiguousContainerOOBMagic = 0xfc;
const int kAsanStackUseAfterScopeMagic = 0xf8;
const int kAsanGlobalRedzoneMagic = 0xf9;
const int kAsanInternalHeapMagic = 0xfe;
static const uptr kCurrentStackFrameMagic = 0x41B58AB3;
static const uptr kRetiredStackFrameMagic = 0x45E0360E;
} // namespace __asan
#endif // ASAN_INTERNAL_H
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