dfg/DFGDesiredTransitions.cpp

   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 "DFGDesiredTransitions.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "CodeBlock.h"
  32 #include "DFGCommonData.h"
  33 #include "JSCInlines.h"
  34
  35 namespace JSC { namespace DFG {
  36
  37 DesiredTransition::DesiredTransition(CodeBlock* codeBlock, ScriptExecutable* codeOriginOwner, Structure* oldStructure, Structure* newStructure)
  38     : m_codeBlock(codeBlock)
  39     , m_codeOriginOwner(codeOriginOwner)
  40     , m_oldStructure(oldStructure)
  41     , m_newStructure(newStructure)
  42 {
  43 }
  44
  45 void DesiredTransition::reallyAdd(VM& vm, CommonData* common)
  46 {
  47     common->transitions.append(
  48         WeakReferenceTransition(
  49             vm, m_codeBlock->ownerExecutable(),
  50             m_codeOriginOwner,
  51             m_oldStructure, m_newStructure));
  52 }
  53
  54 void DesiredTransition::visitChildren(SlotVisitor& visitor)
  55 {
  56     visitor.appendUnbarrieredPointer(&m_codeOriginOwner);
  57     visitor.appendUnbarrieredPointer(&m_oldStructure);
  58     visitor.appendUnbarrieredPointer(&m_newStructure);
  59 }
  60
  61 DesiredTransitions::DesiredTransitions()
  62 {
  63 }
  64
  65 DesiredTransitions::~DesiredTransitions()
  66 {
  67 }
  68
  69 void DesiredTransitions::addLazily(CodeBlock* codeBlock, ScriptExecutable* codeOriginOwner, Structure* oldStructure, Structure* newStructure)
  70 {
  71     m_transitions.append(DesiredTransition(codeBlock, codeOriginOwner, oldStructure, newStructure));
  72 }
  73
  74 void DesiredTransitions::reallyAdd(VM& vm, CommonData* common)
  75 {
  76     for (unsigned i = 0; i < m_transitions.size(); i++)
  77         m_transitions[i].reallyAdd(vm, common);
  78 }
  79
  80 void DesiredTransitions::visitChildren(SlotVisitor& visitor)
  81 {
  82     for (unsigned i = 0; i < m_transitions.size(); i++)
  83         m_transitions[i].visitChildren(visitor);
  84 }
  85
  86 } } // namespace JSC::DFG
  87
  88 #endif // ENABLE(DFG_JIT)