blob: cdb7992e132e58e95a59f41364492fe272a1c104 [file] [log] [blame]
/*
* 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 : public AlignedMemoryAllocator {
public:
IsoAlignedMemoryAllocator(CString);
~IsoAlignedMemoryAllocator();
void* tryAllocateAlignedMemory(size_t alignment, size_t size) override;
void freeAlignedMemory(void*) override;
void dump(PrintStream&) const override;
void* tryAllocateMemory(size_t) override;
void freeMemory(void*) override;
void* tryReallocateMemory(void*, size_t) override;
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