| /* |
| * Copyright (C) 2018 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE_PHYSICAL_PAGE_MAP |
| |
| #include "VMAllocate.h" |
| #include <unordered_set> |
| |
| namespace bmalloc { |
| |
| // This class is useful for debugging bmalloc's footprint. |
| class PhysicalPageMap { |
| public: |
| |
| void commit(void* ptr, size_t size) |
| { |
| forEachPhysicalPage(ptr, size, [&] (void* ptr) { |
| m_physicalPages.insert(ptr); |
| }); |
| } |
| |
| void decommit(void* ptr, size_t size) |
| { |
| forEachPhysicalPage(ptr, size, [&] (void* ptr) { |
| m_physicalPages.erase(ptr); |
| }); |
| } |
| |
| size_t footprint() |
| { |
| return static_cast<size_t>(m_physicalPages.size()) * vmPageSizePhysical(); |
| } |
| |
| private: |
| template <typename F> |
| void forEachPhysicalPage(void* ptr, size_t size, F f) |
| { |
| char* begin = roundUpToMultipleOf(vmPageSizePhysical(), static_cast<char*>(ptr)); |
| char* end = roundDownToMultipleOf(vmPageSizePhysical(), static_cast<char*>(ptr) + size); |
| while (begin < end) { |
| f(begin); |
| begin += vmPageSizePhysical(); |
| } |
| } |
| |
| std::unordered_set<void*> m_physicalPages; |
| }; |
| |
| } // namespace bmalloc |
| |
| #endif // ENABLE_PHYSICAL_PAGE_MAP |