1 // Copyright 2018 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef BASE_ALLOCATOR_PARTITION_ALLOCATOR_PARTITION_COOKIE_H_
6 #define BASE_ALLOCATOR_PARTITION_ALLOCATOR_PARTITION_COOKIE_H_
7
8 #include "base/allocator/partition_allocator/partition_alloc_base/compiler_specific.h"
9 #include "base/allocator/partition_allocator/partition_alloc_base/debug/debugging_buildflags.h"
10 #include "base/allocator/partition_allocator/partition_alloc_check.h"
11
12 namespace partition_alloc::internal {
13
14 static constexpr size_t kCookieSize = 16;
15
16 // Cookie is enabled for debug builds.
17 #if BUILDFLAG(PA_DCHECK_IS_ON)
18
19 inline constexpr unsigned char kCookieValue[kCookieSize] = {
20 0xDE, 0xAD, 0xBE, 0xEF, 0xCA, 0xFE, 0xD0, 0x0D,
21 0x13, 0x37, 0xF0, 0x05, 0xBA, 0x11, 0xAB, 0x1E};
22
23 constexpr size_t kPartitionCookieSizeAdjustment = kCookieSize;
24
PartitionCookieCheckValue(unsigned char * cookie_ptr)25 PA_ALWAYS_INLINE void PartitionCookieCheckValue(unsigned char* cookie_ptr) {
26 for (size_t i = 0; i < kCookieSize; ++i, ++cookie_ptr) {
27 PA_DCHECK(*cookie_ptr == kCookieValue[i]);
28 }
29 }
30
PartitionCookieWriteValue(unsigned char * cookie_ptr)31 PA_ALWAYS_INLINE void PartitionCookieWriteValue(unsigned char* cookie_ptr) {
32 for (size_t i = 0; i < kCookieSize; ++i, ++cookie_ptr) {
33 *cookie_ptr = kCookieValue[i];
34 }
35 }
36
37 #else
38
39 constexpr size_t kPartitionCookieSizeAdjustment = 0;
40
PartitionCookieCheckValue(unsigned char * address)41 PA_ALWAYS_INLINE void PartitionCookieCheckValue(unsigned char* address) {}
42
PartitionCookieWriteValue(unsigned char * cookie_ptr)43 PA_ALWAYS_INLINE void PartitionCookieWriteValue(unsigned char* cookie_ptr) {}
44
45 #endif // BUILDFLAG(PA_DCHECK_IS_ON)
46
47 } // namespace partition_alloc::internal
48
49 #endif // BASE_ALLOCATOR_PARTITION_ALLOCATOR_PARTITION_COOKIE_H_
50