1/* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "DFGCodeBlocks.h" 28 29#include "CodeBlock.h" 30#include "SlotVisitor.h" 31#include <wtf/Vector.h> 32 33namespace JSC { 34 35#if ENABLE(DFG_JIT) 36 37DFGCodeBlocks::DFGCodeBlocks() { } 38 39DFGCodeBlocks::~DFGCodeBlocks() 40{ 41 Vector<OwnPtr<CodeBlock>, 16> toRemove; 42 43 for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) { 44 if ((*iter)->m_dfgData->isJettisoned) 45 toRemove.append(adoptPtr(*iter)); 46 } 47} 48 49void DFGCodeBlocks::jettison(PassOwnPtr<CodeBlock> codeBlockPtr) 50{ 51 // We don't want to delete it now; we just want its pointer. 52 CodeBlock* codeBlock = codeBlockPtr.leakPtr(); 53 54 ASSERT(codeBlock); 55 ASSERT(codeBlock->getJITType() == JITCode::DFGJIT); 56 57 // It should not have already been jettisoned. 58 ASSERT(!codeBlock->m_dfgData->isJettisoned); 59 60 // We should have this block already. 61 ASSERT(m_set.find(codeBlock) != m_set.end()); 62 63 codeBlock->m_dfgData->isJettisoned = true; 64} 65 66void DFGCodeBlocks::clearMarks() 67{ 68 for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) { 69 (*iter)->m_dfgData->mayBeExecuting = false; 70 (*iter)->m_dfgData->visitAggregateHasBeenCalled = false; 71 } 72} 73 74void DFGCodeBlocks::deleteUnmarkedJettisonedCodeBlocks() 75{ 76 Vector<OwnPtr<CodeBlock>, 16> toRemove; 77 78 for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) { 79 if ((*iter)->m_dfgData->isJettisoned && !(*iter)->m_dfgData->mayBeExecuting) 80 toRemove.append(adoptPtr(*iter)); 81 } 82} 83 84void DFGCodeBlocks::traceMarkedCodeBlocks(SlotVisitor& visitor) 85{ 86 for (HashSet<CodeBlock*>::iterator iter = m_set.begin(); iter != m_set.end(); ++iter) { 87 if ((*iter)->m_dfgData->mayBeExecuting) 88 (*iter)->visitAggregate(visitor); 89 } 90} 91 92#else // ENABLE(DFG_JIT) 93 94void DFGCodeBlocks::jettison(PassOwnPtr<CodeBlock>) 95{ 96} 97 98#endif // ENABLE(DFG_JIT) 99 100} // namespace JSC 101 102 103