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1 /* | 1 /* |
2 * Copyright (C) 2014 Google Inc. All rights reserved. | 2 * Copyright (C) 2014 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #ifndef AddressSanitizer_h | 31 #ifndef AddressSanitizer_h |
32 #define AddressSanitizer_h | 32 #define AddressSanitizer_h |
33 | 33 |
34 // The following API isn't exposed by SyzyASan (current version of ASan on | 34 // The following API isn't exposed by SyzyASan (current version of ASan on |
35 // Windows). | 35 // Windows). |
36 // FIXME: Add Windows support here. | 36 // FIXME: Add Windows support here. |
37 #if defined(ADDRESS_SANITIZER) && !OS(WIN) | 37 #if defined(ADDRESS_SANITIZER) && !OS(WIN) |
38 extern "C" { | 38 #include <sanitizer/asan_interface.h> |
39 // Marks memory region [addr, addr+size) as unaddressable. | |
40 // This memory must be previously allocated by the user program. Accessing | |
41 // addresses in this region from instrumented code is forbidden until | |
42 // this region is unpoisoned. This function is not guaranteed to poison | |
43 // the whole region - it may poison only subregion of [addr, addr+size) due | |
44 // to ASan alignment restrictions. | |
45 // Method is NOT thread-safe in the sense that no two threads can | |
46 // (un)poison memory in the same memory region simultaneously. | |
47 void __asan_poison_memory_region(void const volatile*, size_t); | |
48 // Marks memory region [addr, addr+size) as addressable. | |
49 // This memory must be previously allocated by the user program. Accessing | |
50 // addresses in this region is allowed until this region is poisoned again. | |
51 // This function may unpoison a superregion of [addr, addr+size) due to | |
52 // ASan alignment restrictions. | |
53 // Method is NOT thread-safe in the sense that no two threads can | |
54 // (un)poison memory in the same memory region simultaneously. | |
55 void __asan_unpoison_memory_region(void const volatile*, size_t); | |
56 | |
57 // User code should use macros instead of functions. | |
58 #define ASAN_POISON_MEMORY_REGION(addr, size) \ | |
59 __asan_poison_memory_region((addr), (size)) | |
60 #define ASAN_UNPOISON_MEMORY_REGION(addr, size) \ | |
61 __asan_unpoison_memory_region((addr), (size)) | |
62 #define NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address)) | 39 #define NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address)) |
63 } | |
64 #else | 40 #else |
65 #define ASAN_POISON_MEMORY_REGION(addr, size) \ | 41 #define ASAN_POISON_MEMORY_REGION(addr, size) \ |
66 ((void)(addr), (void)(size)) | 42 ((void)(addr), (void)(size)) |
67 #define ASAN_UNPOISON_MEMORY_REGION(addr, size) \ | 43 #define ASAN_UNPOISON_MEMORY_REGION(addr, size) \ |
68 ((void)(addr), (void)(size)) | 44 ((void)(addr), (void)(size)) |
69 #define NO_SANITIZE_ADDRESS | 45 #define NO_SANITIZE_ADDRESS |
70 #endif | 46 #endif |
71 | 47 |
72 const size_t asanMagic = 0xabefeed0; | 48 const size_t asanMagic = 0xabefeed0; |
73 const size_t asanDeferMemoryReuseCount = 2; | 49 const size_t asanDeferMemoryReuseCount = 2; |
74 const size_t asanDeferMemoryReuseMask = 0x3; | 50 const size_t asanDeferMemoryReuseMask = 0x3; |
75 | 51 |
76 #endif | 52 #endif |
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