Martin Stjernholm | c15e7e4 | 2020-12-02 22:50:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ART_LIBARTBASE_BASE_MEMORY_TOOL_H_ |
| 18 | #define ART_LIBARTBASE_BASE_MEMORY_TOOL_H_ |
| 19 | |
| 20 | #include <stddef.h> |
| 21 | |
| 22 | namespace art { |
| 23 | |
| 24 | #if !defined(__has_feature) |
| 25 | # define __has_feature(x) 0 |
| 26 | #endif |
| 27 | |
| 28 | #if __has_feature(address_sanitizer) |
| 29 | |
| 30 | # include <sanitizer/asan_interface.h> |
| 31 | # define ADDRESS_SANITIZER |
| 32 | |
| 33 | # ifdef ART_ENABLE_ADDRESS_SANITIZER |
| 34 | # define MEMORY_TOOL_MAKE_NOACCESS(p, s) __asan_poison_memory_region(p, s) |
| 35 | # define MEMORY_TOOL_MAKE_UNDEFINED(p, s) __asan_unpoison_memory_region(p, s) |
| 36 | # define MEMORY_TOOL_MAKE_DEFINED(p, s) __asan_unpoison_memory_region(p, s) |
| 37 | constexpr bool kMemoryToolIsAvailable = true; |
| 38 | # else |
| 39 | # define MEMORY_TOOL_MAKE_NOACCESS(p, s) do { (void)(p); (void)(s); } while (0) |
| 40 | # define MEMORY_TOOL_MAKE_UNDEFINED(p, s) do { (void)(p); (void)(s); } while (0) |
| 41 | # define MEMORY_TOOL_MAKE_DEFINED(p, s) do { (void)(p); (void)(s); } while (0) |
| 42 | constexpr bool kMemoryToolIsAvailable = false; |
| 43 | # endif |
| 44 | |
| 45 | extern "C" void __asan_handle_no_return(); |
| 46 | |
| 47 | # define ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address, noinline)) |
| 48 | # define MEMORY_TOOL_HANDLE_NO_RETURN __asan_handle_no_return() |
| 49 | constexpr bool kRunningOnMemoryTool = true; |
| 50 | constexpr bool kMemoryToolDetectsLeaks = true; |
| 51 | constexpr bool kMemoryToolAddsRedzones = true; |
| 52 | constexpr size_t kMemoryToolStackGuardSizeScale = 2; |
| 53 | |
| 54 | #else |
| 55 | |
| 56 | # define MEMORY_TOOL_MAKE_NOACCESS(p, s) do { (void)(p); (void)(s); } while (0) |
| 57 | # define MEMORY_TOOL_MAKE_UNDEFINED(p, s) do { (void)(p); (void)(s); } while (0) |
| 58 | # define MEMORY_TOOL_MAKE_DEFINED(p, s) do { (void)(p); (void)(s); } while (0) |
| 59 | # define ATTRIBUTE_NO_SANITIZE_ADDRESS |
| 60 | # define MEMORY_TOOL_HANDLE_NO_RETURN do { } while (0) |
| 61 | constexpr bool kRunningOnMemoryTool = false; |
| 62 | constexpr bool kMemoryToolIsAvailable = false; |
| 63 | constexpr bool kMemoryToolDetectsLeaks = false; |
| 64 | constexpr bool kMemoryToolAddsRedzones = false; |
| 65 | constexpr size_t kMemoryToolStackGuardSizeScale = 1; |
| 66 | |
| 67 | #endif |
| 68 | |
| 69 | #if __has_feature(hwaddress_sanitizer) |
| 70 | # define HWADDRESS_SANITIZER |
| 71 | // NB: The attribute also implies NO_INLINE. If inlined, the hwasan attribute would be lost. |
| 72 | // If method is also separately marked as ALWAYS_INLINE, the NO_INLINE takes precedence. |
| 73 | # define ATTRIBUTE_NO_SANITIZE_HWADDRESS __attribute__((no_sanitize("hwaddress"), noinline)) |
| 74 | #else |
| 75 | # define ATTRIBUTE_NO_SANITIZE_HWADDRESS |
| 76 | #endif |
| 77 | |
| 78 | // Removes the hwasan tag from the pointer (the top eight bits). |
| 79 | // Those bits are used for verification by hwasan and they are ignored by normal ARM memory ops. |
| 80 | template<typename PtrType> |
| 81 | static inline PtrType* HWASanUntag(PtrType* p) { |
| 82 | #if __has_feature(hwaddress_sanitizer) && defined(__aarch64__) |
| 83 | return reinterpret_cast<PtrType*>(reinterpret_cast<uintptr_t>(p) & ((1ULL << 56) - 1)); |
| 84 | #else |
| 85 | return p; |
| 86 | #endif |
| 87 | } |
| 88 | |
| 89 | } // namespace art |
| 90 | |
| 91 | #endif // ART_LIBARTBASE_BASE_MEMORY_TOOL_H_ |