1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // MemorySanitizer support. 6 7 #ifndef V8_BASE_SANITIZER_MSAN_H_ 8 #define V8_BASE_SANITIZER_MSAN_H_ 9 10 #include "src/base/macros.h" 11 #include "src/base/memory.h" 12 13 #ifdef V8_USE_MEMORY_SANITIZER 14 15 #include <sanitizer/msan_interface.h> 16 17 // Marks a memory range as uninitialized, as if it was allocated here. 18 #define MSAN_ALLOCATED_UNINITIALIZED_MEMORY(start, size) \ 19 __msan_allocated_memory(reinterpret_cast<const void*>(start), (size)) 20 21 // Marks a memory range as initialized. 22 #define MSAN_MEMORY_IS_INITIALIZED(start, size) \ 23 __msan_unpoison(reinterpret_cast<const void*>(start), (size)) 24 25 #else // !V8_USE_MEMORY_SANITIZER 26 27 #define MSAN_ALLOCATED_UNINITIALIZED_MEMORY(start, size) \ 28 static_assert((std::is_pointer<decltype(start)>::value || \ 29 std::is_same<v8::base::Address, decltype(start)>::value), \ 30 "static type violation"); \ 31 static_assert(std::is_convertible<decltype(size), size_t>::value, \ 32 "static type violation"); \ 33 USE(start, size) 34 35 #define MSAN_MEMORY_IS_INITIALIZED(start, size) \ 36 MSAN_ALLOCATED_UNINITIALIZED_MEMORY(start, size) 37 38 #endif // V8_USE_MEMORY_SANITIZER 39 40 #endif // V8_BASE_SANITIZER_MSAN_H_ 41