runtime/platform/address_sanitizer.h

// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

#ifndef RUNTIME_PLATFORM_ADDRESS_SANITIZER_H_
#define RUNTIME_PLATFORM_ADDRESS_SANITIZER_H_

#include "platform/globals.h"

// Allow the use of ASan (AddressSanitizer). This is needed as ASan needs to be
// told about areas where the VM does the equivalent of a long-jump.
#if defined(__has_feature)

#if __has_feature(address_sanitizer)
extern "C" void __asan_unpoison_memory_region(void*, size_t);
extern "C" void __lsan_register_root_region(const void* p, size_t size);
extern "C" void __lsan_unregister_root_region(const void* p, size_t size);
#define ASAN_UNPOISON(ptr, len) __asan_unpoison_memory_region(ptr, len)
#define LSAN_REGISTER_ROOT_REGION(ptr, len)                                    \
  __lsan_register_root_region(ptr, len)
#define LSAN_UNREGISTER_ROOT_REGION(ptr, len)                                  \
  __lsan_unregister_root_region(ptr, len)
#else  // __has_feature(address_sanitizer)
#define ASAN_UNPOISON(ptr, len)                                                \
  do {                                                                         \
  } while (false && (ptr) == 0 && (len) == 0)
#define LSAN_REGISTER_ROOT_REGION(ptr, len)                                    \
  do {                                                                         \
  } while (false && (ptr) == 0 && (len) == 0)
#define LSAN_UNREGISTER_ROOT_REGION(ptr, len)                                  \
  do {                                                                         \
  } while (false && (ptr) == 0 && (len) == 0)
#endif  // __has_feature(address_sanitizer)

#else   // defined(__has_feature)

#define ASAN_UNPOISON(ptr, len)                                                \
  do {                                                                         \
  } while (false && (ptr) == 0 && (len) == 0)
#define LSAN_REGISTER_ROOT_REGION(ptr, len)                                    \
  do {                                                                         \
  } while (false && (ptr) == 0 && (len) == 0)
#define LSAN_UNREGISTER_ROOT_REGION(ptr, len)                                  \
  do {                                                                         \
  } while (false && (ptr) == 0 && (len) == 0)

#endif  // defined(__has_feature)

#endif  // RUNTIME_PLATFORM_ADDRESS_SANITIZER_H_