mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
132 lines
4.2 KiB
C++
132 lines
4.2 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "IsoAlignedMemoryAllocator.h"
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#include "MarkedBlock.h"
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namespace JSC {
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IsoAlignedMemoryAllocator::IsoAlignedMemoryAllocator(CString name)
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#if ENABLE(MALLOC_HEAP_BREAKDOWN)
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: m_debugHeap(name.data())
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#endif
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{
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UNUSED_PARAM(name);
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}
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IsoAlignedMemoryAllocator::~IsoAlignedMemoryAllocator()
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{
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#if !ENABLE(MALLOC_HEAP_BREAKDOWN)
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for (unsigned i = 0; i < m_blocks.size(); ++i) {
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void* block = m_blocks[i];
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if (!m_committed[i])
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WTF::fastCommitAlignedMemory(block, MarkedBlock::blockSize);
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fastAlignedFree(block);
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}
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#endif
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}
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void* IsoAlignedMemoryAllocator::tryAllocateAlignedMemory(size_t alignment, size_t size)
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{
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// Since this is designed specially for IsoSubspace, we know that we will only be asked to
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// allocate MarkedBlocks.
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RELEASE_ASSERT(alignment == MarkedBlock::blockSize);
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RELEASE_ASSERT(size == MarkedBlock::blockSize);
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#if ENABLE(MALLOC_HEAP_BREAKDOWN)
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return m_debugHeap.memalign(MarkedBlock::blockSize, MarkedBlock::blockSize, true);
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#else
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auto locker = holdLock(m_lock);
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m_firstUncommitted = m_committed.findBit(m_firstUncommitted, false);
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if (m_firstUncommitted < m_blocks.size()) {
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m_committed[m_firstUncommitted] = true;
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void* result = m_blocks[m_firstUncommitted];
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WTF::fastCommitAlignedMemory(result, MarkedBlock::blockSize);
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return result;
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}
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void* result = tryFastAlignedMalloc(MarkedBlock::blockSize, MarkedBlock::blockSize);
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if (!result)
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return nullptr;
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unsigned index = m_blocks.size();
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m_blocks.append(result);
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m_blockIndices.add(result, index);
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if (m_blocks.capacity() != m_committed.size())
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m_committed.resize(m_blocks.capacity());
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m_committed[index] = true;
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return result;
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#endif
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}
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void IsoAlignedMemoryAllocator::freeAlignedMemory(void* basePtr)
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{
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#if ENABLE(MALLOC_HEAP_BREAKDOWN)
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m_debugHeap.free(basePtr);
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#else
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auto locker = holdLock(m_lock);
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auto iter = m_blockIndices.find(basePtr);
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RELEASE_ASSERT(iter != m_blockIndices.end());
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unsigned index = iter->value;
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m_committed[index] = false;
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m_firstUncommitted = std::min(index, m_firstUncommitted);
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WTF::fastDecommitAlignedMemory(basePtr, MarkedBlock::blockSize);
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#endif
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}
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void IsoAlignedMemoryAllocator::dump(PrintStream& out) const
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{
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out.print("Iso(", RawPointer(this), ")");
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}
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void* IsoAlignedMemoryAllocator::tryAllocateMemory(size_t size)
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{
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#if ENABLE(MALLOC_HEAP_BREAKDOWN)
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return m_debugHeap.malloc(size);
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#else
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return FastMalloc::tryMalloc(size);
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#endif
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}
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void IsoAlignedMemoryAllocator::freeMemory(void* pointer)
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{
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#if ENABLE(MALLOC_HEAP_BREAKDOWN)
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m_debugHeap.free(pointer);
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#else
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FastMalloc::free(pointer);
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#endif
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}
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void* IsoAlignedMemoryAllocator::tryReallocateMemory(void*, size_t)
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{
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// In IsoSubspace-managed PreciseAllocation, we must not perform realloc.
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RELEASE_ASSERT_NOT_REACHED();
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}
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} // namespace JSC
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