dfg/DFGDesiredWatchpoints.cpp

   1 /*
   2  * Copyright (C) 2013-2015 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 "DFGDesiredWatchpoints.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "ArrayBufferNeuteringWatchpoint.h"
  32 #include "CodeBlock.h"
  33 #include "JSCInlines.h"
  34
  35 namespace JSC { namespace DFG {
  36
  37 void ArrayBufferViewWatchpointAdaptor::add(
  38     CodeBlock* codeBlock, JSArrayBufferView* view, Watchpoint* watchpoint)
  39 {
  40     ArrayBufferNeuteringWatchpoint* neuteringWatchpoint =
  41         ArrayBufferNeuteringWatchpoint::create(*codeBlock->vm());
  42     neuteringWatchpoint->set()->add(watchpoint);
  43     codeBlock->addConstant(neuteringWatchpoint);
  44     codeBlock->vm()->heap.addReference(neuteringWatchpoint, view->buffer());
  45 }
  46
  47 void InferredValueAdaptor::add(
  48     CodeBlock* codeBlock, InferredValue* inferredValue, Watchpoint* watchpoint)
  49 {
  50     codeBlock->addConstant(inferredValue); // For common users, it doesn't really matter if it's weak or not. If references to it go away, we go away, too.
  51     inferredValue->add(watchpoint);
  52 }
  53
  54 DesiredWatchpoints::DesiredWatchpoints() { }
  55 DesiredWatchpoints::~DesiredWatchpoints() { }
  56
  57 void DesiredWatchpoints::addLazily(WatchpointSet* set)
  58 {
  59     m_sets.addLazily(set);
  60 }
  61
  62 void DesiredWatchpoints::addLazily(InlineWatchpointSet& set)
  63 {
  64     m_inlineSets.addLazily(&set);
  65 }
  66
  67 void DesiredWatchpoints::addLazily(InferredValue* inferredValue)
  68 {
  69     m_inferredValues.addLazily(inferredValue);
  70 }
  71
  72 void DesiredWatchpoints::addLazily(JSArrayBufferView* view)
  73 {
  74     m_bufferViews.addLazily(view);
  75 }
  76
  77 bool DesiredWatchpoints::consider(Structure* structure)
  78 {
  79     if (!structure->dfgShouldWatch())
  80         return false;
  81     addLazily(structure->transitionWatchpointSet());
  82     return true;
  83 }
  84
  85 void DesiredWatchpoints::reallyAdd(CodeBlock* codeBlock, CommonData& commonData)
  86 {
  87     m_sets.reallyAdd(codeBlock, commonData);
  88     m_inlineSets.reallyAdd(codeBlock, commonData);
  89     m_inferredValues.reallyAdd(codeBlock, commonData);
  90     m_bufferViews.reallyAdd(codeBlock, commonData);
  91 }
  92
  93 bool DesiredWatchpoints::areStillValid() const
  94 {
  95     return m_sets.areStillValid()
  96         && m_inlineSets.areStillValid()
  97         && m_inferredValues.areStillValid()
  98         && m_bufferViews.areStillValid();
  99 }
 100
 101 } } // namespace JSC::DFG
 102
 103 #endif // ENABLE(DFG_JIT)
 104