| // Copyright 2017 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/base/page-allocator.h" |
| |
| #include "src/base/platform/platform.h" |
| |
| namespace v8 { |
| namespace base { |
| |
| #define STATIC_ASSERT_ENUM(a, b) \ |
| static_assert(static_cast<int>(a) == static_cast<int>(b), \ |
| "mismatching enum: " #a) |
| |
| STATIC_ASSERT_ENUM(PageAllocator::kNoAccess, |
| base::OS::MemoryPermission::kNoAccess); |
| STATIC_ASSERT_ENUM(PageAllocator::kReadWrite, |
| base::OS::MemoryPermission::kReadWrite); |
| STATIC_ASSERT_ENUM(PageAllocator::kReadWriteExecute, |
| base::OS::MemoryPermission::kReadWriteExecute); |
| STATIC_ASSERT_ENUM(PageAllocator::kReadExecute, |
| base::OS::MemoryPermission::kReadExecute); |
| |
| #undef STATIC_ASSERT_ENUM |
| |
| PageAllocator::PageAllocator() |
| : allocate_page_size_(base::OS::AllocatePageSize()), |
| commit_page_size_(base::OS::CommitPageSize()) {} |
| |
| void PageAllocator::SetRandomMmapSeed(int64_t seed) { |
| base::OS::SetRandomMmapSeed(seed); |
| } |
| |
| void* PageAllocator::GetRandomMmapAddr() { |
| return base::OS::GetRandomMmapAddr(); |
| } |
| |
| void* PageAllocator::AllocatePages(void* address, size_t size, size_t alignment, |
| PageAllocator::Permission access) { |
| return base::OS::Allocate(address, size, alignment, |
| static_cast<base::OS::MemoryPermission>(access)); |
| } |
| |
| bool PageAllocator::FreePages(void* address, size_t size) { |
| return base::OS::Free(address, size); |
| } |
| |
| bool PageAllocator::ReleasePages(void* address, size_t size, size_t new_size) { |
| DCHECK_LT(new_size, size); |
| return base::OS::Release(reinterpret_cast<uint8_t*>(address) + new_size, |
| size - new_size); |
| } |
| |
| bool PageAllocator::SetPermissions(void* address, size_t size, |
| PageAllocator::Permission access) { |
| return base::OS::SetPermissions( |
| address, size, static_cast<base::OS::MemoryPermission>(access)); |
| } |
| |
| bool PageAllocator::DiscardSystemPages(void* address, size_t size) { |
| return base::OS::DiscardSystemPages(address, size); |
| } |
| |
| } // namespace base |
| } // namespace v8 |