зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.4 KiB
C
72 строки
2.4 KiB
C
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
||
|
|
/* 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 http://mozilla.org/MPL/2.0/. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(MOZ_ASAN) || defined(MOZ_VALGRIND)
|
||
|
|
#define MOZ_HAVE_MEM_CHECKS 1
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#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)
|
||
|
|
__attribute__((visibility("default")));
|
||
|
|
void __asan_unpoison_memory_region(void const volatile *addr, size_t size)
|
||
|
|
__attribute__((visibility("default")));
|
||
|
|
|
||
|
|
#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) \
|
||
|
|
VALGRIND_MAKE_MEM_NOACCESS((addr), (size))
|
||
|
|
|
||
|
|
#define MOZ_MAKE_MEM_UNDEFINED(addr, size) \
|
||
|
|
VALGRIND_MAKE_MEM_UNDEFINED((addr), (size))
|
||
|
|
|
||
|
|
#define MOZ_MAKE_MEM_DEFINED(addr, size) \
|
||
|
|
VALGRIND_MAKE_MEM_DEFINED((addr), (size))
|
||
|
|
#else
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
#endif /* mozilla_MemoryChecking_h_ */
|