author Kyle Huey <>
Sat, 15 Mar 2014 12:00:15 -0700
changeset 190962 32f48d6d3389ea5db45cfc6e452ec52595c11a43
parent 151964 f55906cadf07a9ef44cc4ce2574fe35f3dc85672
child 210314 cf068fd95d3cef2e75205ae37c937bfaee01506f
permissions -rw-r--r--
Bug 967364: Rename already_AddRefed::get to take. r=bsmedberg

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at */

 * Provides a common interface to the ASan (AddressSanitizer) and Valgrind 
 * functions used to mark memory in certain ways. In detail, the following
 * three macros are provided:
 *   MOZ_MAKE_MEM_NOACCESS  - Mark memory as unsafe to access (e.g. freed)
 *   MOZ_MAKE_MEM_UNDEFINED - Mark memory as accessible, with content undefined
 *   MOZ_MAKE_MEM_DEFINED - Mark memory as accessible, with content defined
 * With Valgrind in use, these directly map to the three respective Valgrind
 * macros. With ASan in use, the NOACCESS macro maps to poisoning the memory,
 * while the UNDEFINED/DEFINED macros unpoison memory.
 * With no memory checker available, all macros expand to the empty statement.

#ifndef mozilla_MemoryChecking_h
#define mozilla_MemoryChecking_h

#if defined(MOZ_VALGRIND)
#include "valgrind/memcheck.h"

#if defined(MOZ_ASAN) || defined(MOZ_VALGRIND)

#if defined(MOZ_ASAN)
#include <stddef.h>

extern "C" {
  /* These definitions are usually provided through the 
   * sanitizer/asan_interface.h header installed by ASan.
  void __asan_poison_memory_region(void const volatile *addr, size_t size)
  void __asan_unpoison_memory_region(void const volatile *addr, size_t size)

#define MOZ_MAKE_MEM_NOACCESS(addr, size) \
  __asan_poison_memory_region((addr), (size))

#define MOZ_MAKE_MEM_UNDEFINED(addr, size) \
  __asan_unpoison_memory_region((addr), (size))

#define MOZ_MAKE_MEM_DEFINED(addr, size) \
  __asan_unpoison_memory_region((addr), (size))
#elif defined(MOZ_VALGRIND)
#define MOZ_MAKE_MEM_NOACCESS(addr, size) \

#define MOZ_MAKE_MEM_UNDEFINED(addr, size) \

#define MOZ_MAKE_MEM_DEFINED(addr, size) \

#define MOZ_MAKE_MEM_NOACCESS(addr, size) do {} while(0)
#define MOZ_MAKE_MEM_UNDEFINED(addr, size) do {} while(0)
#define MOZ_MAKE_MEM_DEFINED(addr, size) do {} while(0)


#endif /* mozilla_MemoryChecking_h */