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- // Copyright 2014 The Chromium 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 "base/mac/scoped_mach_vm.h"
- #include "base/mac/mach_logging.h"
- namespace base::mac {
- void ScopedMachVM::reset(vm_address_t address, vm_size_t size) {
- DCHECK_EQ(address % PAGE_SIZE, 0u);
- DCHECK_EQ(size % PAGE_SIZE, 0u);
- reset_unaligned(address, size);
- }
- void ScopedMachVM::reset_unaligned(vm_address_t address, vm_size_t size) {
- if (size_) {
- if (address_ < address) {
- kern_return_t kr = vm_deallocate(mach_task_self(), address_,
- std::min(size_, address - address_));
- MACH_DCHECK(kr == KERN_SUCCESS, kr) << "vm_deallocate";
- }
- if (address_ + size_ > address + size) {
- vm_address_t deallocate_start = std::max(address_, address + size);
- kern_return_t kr = vm_deallocate(mach_task_self(), deallocate_start,
- address_ + size_ - deallocate_start);
- MACH_DCHECK(kr == KERN_SUCCESS, kr) << "vm_deallocate";
- }
- }
- address_ = address;
- size_ = size;
- }
- } // namespace base::mac
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