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