1/* 2 * Copyright (C) 2013, 2014 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. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "DFGDesiredWriteBarriers.h" 28 29#if ENABLE(DFG_JIT) 30 31#include "CodeBlock.h" 32#include "JSCInlines.h" 33 34namespace JSC { namespace DFG { 35 36DesiredWriteBarrier::DesiredWriteBarrier(Type type, CodeBlock* codeBlock, unsigned index, JSCell* owner) 37 : m_owner(owner) 38 , m_type(type) 39 , m_codeBlock(codeBlock) 40{ 41 m_which.index = index; 42} 43 44DesiredWriteBarrier::DesiredWriteBarrier(Type type, CodeBlock* codeBlock, InlineCallFrame* inlineCallFrame, JSCell* owner) 45 : m_owner(owner) 46 , m_type(type) 47 , m_codeBlock(codeBlock) 48{ 49 m_which.inlineCallFrame = inlineCallFrame; 50} 51 52void DesiredWriteBarrier::trigger(VM& vm) 53{ 54 switch (m_type) { 55 case ConstantType: { 56 WriteBarrier<Unknown>& barrier = m_codeBlock->constants()[m_which.index]; 57 barrier.set(vm, m_owner, barrier.get()); 58 return; 59 } 60 61 case InlineCallFrameExecutableType: { 62 InlineCallFrame* inlineCallFrame = m_which.inlineCallFrame; 63 WriteBarrier<ScriptExecutable>& executable = inlineCallFrame->executable; 64 executable.set(vm, m_owner, executable.get()); 65 return; 66 } } 67 RELEASE_ASSERT_NOT_REACHED(); 68} 69 70void DesiredWriteBarrier::visitChildren(SlotVisitor& visitor) 71{ 72 switch (m_type) { 73 case ConstantType: { 74 WriteBarrier<Unknown>& barrier = m_codeBlock->constants()[m_which.index]; 75 visitor.append(&barrier); 76 return; 77 } 78 79 case InlineCallFrameExecutableType: { 80 InlineCallFrame* inlineCallFrame = m_which.inlineCallFrame; 81 WriteBarrier<ScriptExecutable>& executable = inlineCallFrame->executable; 82 visitor.append(&executable); 83 return; 84 } } 85 RELEASE_ASSERT_NOT_REACHED(); 86} 87 88DesiredWriteBarriers::DesiredWriteBarriers() 89{ 90} 91 92DesiredWriteBarriers::~DesiredWriteBarriers() 93{ 94} 95 96void DesiredWriteBarriers::trigger(VM& vm) 97{ 98 for (unsigned i = 0; i < m_barriers.size(); i++) 99 m_barriers[i].trigger(vm); 100} 101 102void DesiredWriteBarriers::visitChildren(SlotVisitor& visitor) 103{ 104 for (unsigned i = 0; i < m_barriers.size(); i++) 105 m_barriers[i].visitChildren(visitor); 106} 107 108} } // namespace JSC::DFG 109 110#endif // ENABLE(DFG_JIT) 111