1 // Copyright 2017 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 #include "src/base/page-allocator.h"
6
7 #include "src/base/platform/platform.h"
8
9 namespace v8 {
10 namespace base {
11
12 #define STATIC_ASSERT_ENUM(a, b) \
13 static_assert(static_cast<int>(a) == static_cast<int>(b), \
14 "mismatching enum: " #a)
15
16 STATIC_ASSERT_ENUM(PageAllocator::kNoAccess,
17 base::OS::MemoryPermission::kNoAccess);
18 STATIC_ASSERT_ENUM(PageAllocator::kReadWrite,
19 base::OS::MemoryPermission::kReadWrite);
20 STATIC_ASSERT_ENUM(PageAllocator::kReadWriteExecute,
21 base::OS::MemoryPermission::kReadWriteExecute);
22 STATIC_ASSERT_ENUM(PageAllocator::kReadExecute,
23 base::OS::MemoryPermission::kReadExecute);
24
25 #undef STATIC_ASSERT_ENUM
26
AllocatePageSize()27 size_t PageAllocator::AllocatePageSize() {
28 return base::OS::AllocatePageSize();
29 }
30
CommitPageSize()31 size_t PageAllocator::CommitPageSize() { return base::OS::CommitPageSize(); }
32
SetRandomMmapSeed(int64_t seed)33 void PageAllocator::SetRandomMmapSeed(int64_t seed) {
34 base::OS::SetRandomMmapSeed(seed);
35 }
36
GetRandomMmapAddr()37 void* PageAllocator::GetRandomMmapAddr() {
38 return base::OS::GetRandomMmapAddr();
39 }
40
AllocatePages(void * address,size_t size,size_t alignment,PageAllocator::Permission access)41 void* PageAllocator::AllocatePages(void* address, size_t size, size_t alignment,
42 PageAllocator::Permission access) {
43 return base::OS::Allocate(address, size, alignment,
44 static_cast<base::OS::MemoryPermission>(access));
45 }
46
FreePages(void * address,size_t size)47 bool PageAllocator::FreePages(void* address, size_t size) {
48 return base::OS::Free(address, size);
49 }
50
ReleasePages(void * address,size_t size,size_t new_size)51 bool PageAllocator::ReleasePages(void* address, size_t size, size_t new_size) {
52 DCHECK_LT(new_size, size);
53 return base::OS::Release(reinterpret_cast<uint8_t*>(address) + new_size,
54 size - new_size);
55 }
56
SetPermissions(void * address,size_t size,PageAllocator::Permission access)57 bool PageAllocator::SetPermissions(void* address, size_t size,
58 PageAllocator::Permission access) {
59 return base::OS::SetPermissions(
60 address, size, static_cast<base::OS::MemoryPermission>(access));
61 }
62
63 } // namespace base
64 } // namespace v8
65