186 lines
5.5 KiB
C++
186 lines
5.5 KiB
C++
//===-- asan_internal.h -----------------------------------------*- C++ -*-===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// ASan-private header which defines various general utilities.
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_INTERNAL_H
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#define ASAN_INTERNAL_H
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#include "asan_flags.h"
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#include "asan_interface_internal.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#if !defined(__linux__) && !defined(__APPLE__) && !defined(_WIN32)
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# error "This operating system is not supported by AddressSanitizer"
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#endif
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#define ASAN_DEFAULT_FAILURE_EXITCODE 1
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#if defined(__linux__)
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# define ASAN_LINUX 1
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#else
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# define ASAN_LINUX 0
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#endif
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#if defined(__APPLE__)
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# define ASAN_MAC 1
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#else
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# define ASAN_MAC 0
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#endif
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#if defined(_WIN32)
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# define ASAN_WINDOWS 1
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#else
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# define ASAN_WINDOWS 0
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#endif
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#if defined(__ANDROID__) || defined(ANDROID)
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# define ASAN_ANDROID 1
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#else
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# define ASAN_ANDROID 0
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#endif
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#define ASAN_POSIX (ASAN_LINUX || ASAN_MAC)
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#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
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# error "The AddressSanitizer run-time should not be"
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" instrumented by AddressSanitizer"
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#endif
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// Build-time configuration options.
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// If set, asan will install its own SEGV signal handler.
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#ifndef ASAN_NEEDS_SEGV
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# if ASAN_ANDROID == 1
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# define ASAN_NEEDS_SEGV 0
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# else
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# define ASAN_NEEDS_SEGV 1
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# endif
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#endif
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// If set, asan will intercept C++ exception api call(s).
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#ifndef ASAN_HAS_EXCEPTIONS
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# define ASAN_HAS_EXCEPTIONS 1
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#endif
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// If set, asan uses the values of SHADOW_SCALE and SHADOW_OFFSET
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// provided by the instrumented objects. Otherwise constants are used.
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#ifndef ASAN_FLEXIBLE_MAPPING_AND_OFFSET
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# define ASAN_FLEXIBLE_MAPPING_AND_OFFSET 0
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#endif
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// If set, values like allocator chunk size, as well as defaults for some flags
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// will be changed towards less memory overhead.
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#ifndef ASAN_LOW_MEMORY
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#if SANITIZER_WORDSIZE == 32
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# define ASAN_LOW_MEMORY 1
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#else
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# define ASAN_LOW_MEMORY 0
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# endif
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#endif
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#ifndef ASAN_USE_PREINIT_ARRAY
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# define ASAN_USE_PREINIT_ARRAY (ASAN_LINUX && !ASAN_ANDROID)
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#endif
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// All internal functions in asan reside inside the __asan namespace
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// to avoid namespace collisions with the user programs.
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// Seperate namespace also makes it simpler to distinguish the asan run-time
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// functions from the instrumented user code in a profile.
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namespace __asan {
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class AsanThread;
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using __sanitizer::StackTrace;
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// asan_rtl.cc
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void NORETURN ShowStatsAndAbort();
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void ReplaceOperatorsNewAndDelete();
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// asan_malloc_linux.cc / asan_malloc_mac.cc
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void ReplaceSystemMalloc();
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// asan_linux.cc / asan_mac.cc / asan_win.cc
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void *AsanDoesNotSupportStaticLinkage();
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void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp);
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void MaybeReexec();
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bool AsanInterceptsSignal(int signum);
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void SetAlternateSignalStack();
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void UnsetAlternateSignalStack();
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void InstallSignalHandlers();
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void ReadContextStack(void *context, uptr *stack, uptr *ssize);
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void AsanPlatformThreadInit();
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// Wrapper for TLS/TSD.
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void AsanTSDInit(void (*destructor)(void *tsd));
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void *AsanTSDGet();
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void AsanTSDSet(void *tsd);
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void AppendToErrorMessageBuffer(const char *buffer);
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// asan_poisoning.cc
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// Poisons the shadow memory for "size" bytes starting from "addr".
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void PoisonShadow(uptr addr, uptr size, u8 value);
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// Poisons the shadow memory for "redzone_size" bytes starting from
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// "addr + size".
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void PoisonShadowPartialRightRedzone(uptr addr,
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uptr size,
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uptr redzone_size,
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u8 value);
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// Platfrom-specific options.
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#ifdef __APPLE__
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bool PlatformHasDifferentMemcpyAndMemmove();
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# define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE \
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(PlatformHasDifferentMemcpyAndMemmove())
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#else
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# define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE true
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#endif // __APPLE__
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// Add convenient macro for interface functions that may be represented as
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// weak hooks.
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#define ASAN_MALLOC_HOOK(ptr, size) \
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if (&__asan_malloc_hook) __asan_malloc_hook(ptr, size)
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#define ASAN_FREE_HOOK(ptr) \
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if (&__asan_free_hook) __asan_free_hook(ptr)
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#define ASAN_ON_ERROR() \
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if (&__asan_on_error) __asan_on_error()
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extern int asan_inited;
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// Used to avoid infinite recursion in __asan_init().
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extern bool asan_init_is_running;
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extern void (*death_callback)(void);
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// These magic values are written to shadow for better error reporting.
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const int kAsanHeapLeftRedzoneMagic = 0xfa;
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const int kAsanHeapRightRedzoneMagic = 0xfb;
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const int kAsanHeapFreeMagic = 0xfd;
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const int kAsanStackLeftRedzoneMagic = 0xf1;
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const int kAsanStackMidRedzoneMagic = 0xf2;
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const int kAsanStackRightRedzoneMagic = 0xf3;
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const int kAsanStackPartialRedzoneMagic = 0xf4;
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const int kAsanStackAfterReturnMagic = 0xf5;
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const int kAsanInitializationOrderMagic = 0xf6;
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const int kAsanUserPoisonedMemoryMagic = 0xf7;
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const int kAsanStackUseAfterScopeMagic = 0xf8;
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const int kAsanGlobalRedzoneMagic = 0xf9;
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const int kAsanInternalHeapMagic = 0xfe;
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static const uptr kCurrentStackFrameMagic = 0x41B58AB3;
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static const uptr kRetiredStackFrameMagic = 0x45E0360E;
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} // namespace __asan
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#endif // ASAN_INTERNAL_H
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