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comparison: mfbt/MemoryChecking.h
mfbt/MemoryChecking.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:51f7ec19fcb2 |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /* | |
| 8 * Provides a common interface to the ASan (AddressSanitizer) and Valgrind | |
| 9 * functions used to mark memory in certain ways. In detail, the following | |
| 10 * three macros are provided: | |
| 11 * | |
| 12 * MOZ_MAKE_MEM_NOACCESS - Mark memory as unsafe to access (e.g. freed) | |
| 13 * MOZ_MAKE_MEM_UNDEFINED - Mark memory as accessible, with content undefined | |
| 14 * MOZ_MAKE_MEM_DEFINED - Mark memory as accessible, with content defined | |
| 15 * | |
| 16 * With Valgrind in use, these directly map to the three respective Valgrind | |
| 17 * macros. With ASan in use, the NOACCESS macro maps to poisoning the memory, | |
| 18 * while the UNDEFINED/DEFINED macros unpoison memory. | |
| 19 * | |
| 20 * With no memory checker available, all macros expand to the empty statement. | |
| 21 */ | |
| 22 | |
| 23 #ifndef mozilla_MemoryChecking_h | |
| 24 #define mozilla_MemoryChecking_h | |
| 25 | |
| 26 #if defined(MOZ_VALGRIND) | |
| 27 #include "valgrind/memcheck.h" | |
| 28 #endif | |
| 29 | |
| 30 #if defined(MOZ_ASAN) || defined(MOZ_VALGRIND) | |
| 31 #define MOZ_HAVE_MEM_CHECKS 1 | |
| 32 #endif | |
| 33 | |
| 34 #if defined(MOZ_ASAN) | |
| 35 #include <stddef.h> | |
| 36 | |
| 37 extern "C" { | |
| 38 /* These definitions are usually provided through the | |
| 39 * sanitizer/asan_interface.h header installed by ASan. | |
| 40 */ | |
| 41 void __asan_poison_memory_region(void const volatile *addr, size_t size) | |
| 42 __attribute__((visibility("default"))); | |
| 43 void __asan_unpoison_memory_region(void const volatile *addr, size_t size) | |
| 44 __attribute__((visibility("default"))); | |
| 45 | |
| 46 #define MOZ_MAKE_MEM_NOACCESS(addr, size) \ | |
| 47 __asan_poison_memory_region((addr), (size)) | |
| 48 | |
| 49 #define MOZ_MAKE_MEM_UNDEFINED(addr, size) \ | |
| 50 __asan_unpoison_memory_region((addr), (size)) | |
| 51 | |
| 52 #define MOZ_MAKE_MEM_DEFINED(addr, size) \ | |
| 53 __asan_unpoison_memory_region((addr), (size)) | |
| 54 } | |
| 55 #elif defined(MOZ_VALGRIND) | |
| 56 #define MOZ_MAKE_MEM_NOACCESS(addr, size) \ | |
| 57 VALGRIND_MAKE_MEM_NOACCESS((addr), (size)) | |
| 58 | |
| 59 #define MOZ_MAKE_MEM_UNDEFINED(addr, size) \ | |
| 60 VALGRIND_MAKE_MEM_UNDEFINED((addr), (size)) | |
| 61 | |
| 62 #define MOZ_MAKE_MEM_DEFINED(addr, size) \ | |
| 63 VALGRIND_MAKE_MEM_DEFINED((addr), (size)) | |
| 64 #else | |
| 65 | |
| 66 #define MOZ_MAKE_MEM_NOACCESS(addr, size) do {} while(0) | |
| 67 #define MOZ_MAKE_MEM_UNDEFINED(addr, size) do {} while(0) | |
| 68 #define MOZ_MAKE_MEM_DEFINED(addr, size) do {} while(0) | |
| 69 | |
| 70 #endif | |
| 71 | |
| 72 #endif /* mozilla_MemoryChecking_h */ |
