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* Copyright (C) 2011 Apple Inc. All rights reserved.
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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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* 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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* 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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#include "DFGCodeBlocks.h"
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#include "CodeBlock.h"
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#include "SlotVisitor.h"
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#include <wtf/Vector.h>
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DFGCodeBlocks::DFGCodeBlocks() { }
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DFGCodeBlocks::~DFGCodeBlocks()
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Vector<CodeBlock*, 16> toRemove;
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for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) {
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if ((*iter)->m_dfgData->isJettisoned)
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toRemove.append(*iter);
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WTF::deleteAllValues(toRemove);
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void DFGCodeBlocks::jettison(PassOwnPtr<CodeBlock> codeBlockPtr)
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// We don't want to delete it now; we just want its pointer.
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CodeBlock* codeBlock = codeBlockPtr.leakPtr();
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ASSERT(codeBlock->getJITType() == JITCode::DFGJIT);
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// It should not have already been jettisoned.
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ASSERT(!codeBlock->m_dfgData->isJettisoned);
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// We should have this block already.
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ASSERT(m_set.find(codeBlock) != m_set.end());
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codeBlock->m_dfgData->isJettisoned = true;
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void DFGCodeBlocks::clearMarks()
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for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) {
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(*iter)->m_dfgData->mayBeExecuting = false;
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(*iter)->m_dfgData->visitAggregateHasBeenCalled = false;
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void DFGCodeBlocks::deleteUnmarkedJettisonedCodeBlocks()
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Vector<CodeBlock*, 16> toRemove;
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for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) {
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if ((*iter)->m_dfgData->isJettisoned && !(*iter)->m_dfgData->mayBeExecuting)
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toRemove.append(*iter);
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WTF::deleteAllValues(toRemove);
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void DFGCodeBlocks::traceMarkedCodeBlocks(SlotVisitor& visitor)
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for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) {
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if ((*iter)->m_dfgData->mayBeExecuting)
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(*iter)->visitAggregate(visitor);
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#else // ENABLE(DFG_JIT)
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void DFGCodeBlocks::jettison(PassOwnPtr<CodeBlock>)
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#endif // ENABLE(DFG_JIT)