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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_SANITIZER_MSAN_H_
8 #define V8_SANITIZER_MSAN_H_
9 
10 #include "src/base/macros.h"
11 #include "src/common/globals.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(p, s) \
19   __msan_allocated_memory(reinterpret_cast<const void*>(p), (s))
20 // Marks a memory range as initialized.
21 #define MSAN_MEMORY_IS_INITIALIZED(p, s) \
22   __msan_unpoison(reinterpret_cast<const void*>(p), (s))
23 
24 #else  // !V8_USE_MEMORY_SANITIZER
25 
26 #define MSAN_ALLOCATED_UNINITIALIZED_MEMORY(p, s)                            \
27   static_assert((std::is_pointer<decltype(p)>::value ||                      \
28                  std::is_same<v8::internal::Address, decltype(p)>::value) && \
29                     std::is_convertible<decltype(s), size_t>::value,         \
30                 "static type violation")
31 #define MSAN_MEMORY_IS_INITIALIZED(p, s) \
32   MSAN_ALLOCATED_UNINITIALIZED_MEMORY(p, s)
33 
34 #endif  // V8_USE_MEMORY_SANITIZER
35 
36 #endif  // V8_SANITIZER_MSAN_H_
37