/* * Copyright (C) 2017 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 #include "AlignedMemoryAllocator.h" #include <wtf/DebugHeap.h> #include <wtf/FastBitVector.h> #include <wtf/HashMap.h> #include <wtf/Vector.h> namespace JSC { class IsoAlignedMemoryAllocator final : public AlignedMemoryAllocator { public: IsoAlignedMemoryAllocator(CString); ~IsoAlignedMemoryAllocator() final; void* tryAllocateAlignedMemory(size_t alignment, size_t size) final; void freeAlignedMemory(void*) final; void dump(PrintStream&) const final; void* tryAllocateMemory(size_t) final; void freeMemory(void*) final; void* tryReallocateMemory(void*, size_t) final; private: #if ENABLE(MALLOC_HEAP_BREAKDOWN) // If breakdown is enabled, we do not ensure Iso-feature. This is totally OK since breakdown is memory bloat debugging feature. WTF::DebugHeap m_debugHeap; #else Vector<void*> m_blocks; HashMap<void*, unsigned> m_blockIndices; FastBitVector m_committed; unsigned m_firstUncommitted { 0 }; Lock m_lock; #endif }; } // namespace JSC