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