1/*
2 * Copyright (C) 2013-2016 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 "ArrayBufferNeuteringWatchpointSet.h"
32#include "CodeBlock.h"
33#include "JSCInlines.h"
34
35namespace JSC { namespace DFG {
36
37void ArrayBufferViewWatchpointAdaptor::add(
38 CodeBlock* codeBlock, JSArrayBufferView* view, CommonData& common)
39{
40 VM& vm = *codeBlock->vm();
41 Watchpoint* watchpoint = common.watchpoints.add(codeBlock);
42 ArrayBufferNeuteringWatchpointSet* neuteringWatchpoint =
43 ArrayBufferNeuteringWatchpointSet::create(vm);
44 neuteringWatchpoint->set().add(watchpoint);
45 codeBlock->addConstant(neuteringWatchpoint);
46 // FIXME: We don't need to set this watchpoint at all for shared buffers.
47 // https://bugs.webkit.org/show_bug.cgi?id=164108
48 vm.heap.addReference(neuteringWatchpoint, view->possiblySharedBuffer());
49}
50
51void InferredValueAdaptor::add(
52 CodeBlock* codeBlock, InferredValue* inferredValue, CommonData& common)
53{
54 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.
55 inferredValue->add(common.watchpoints.add(codeBlock));
56}
57
58void AdaptiveStructureWatchpointAdaptor::add(
59 CodeBlock* codeBlock, const ObjectPropertyCondition& key, CommonData& common)
60{
61 VM& vm = *codeBlock->vm();
62 switch (key.kind()) {
63 case PropertyCondition::Equivalence:
64 common.adaptiveInferredPropertyValueWatchpoints.add(key, codeBlock)->install(vm);
65 break;
66 default:
67 common.adaptiveStructureWatchpoints.add(key, codeBlock)->install(vm);
68 break;
69 }
70}
71
72DesiredWatchpoints::DesiredWatchpoints() { }
73DesiredWatchpoints::~DesiredWatchpoints() { }
74
75void DesiredWatchpoints::addLazily(WatchpointSet* set)
76{
77 m_sets.addLazily(set);
78}
79
80void DesiredWatchpoints::addLazily(InlineWatchpointSet& set)
81{
82 m_inlineSets.addLazily(&set);
83}
84
85void DesiredWatchpoints::addLazily(InferredValue* inferredValue)
86{
87 m_inferredValues.addLazily(inferredValue);
88}
89
90void DesiredWatchpoints::addLazily(JSArrayBufferView* view)
91{
92 m_bufferViews.addLazily(view);
93}
94
95void DesiredWatchpoints::addLazily(const ObjectPropertyCondition& key)
96{
97 m_adaptiveStructureSets.addLazily(key);
98}
99
100bool DesiredWatchpoints::consider(Structure* structure)
101{
102 if (!structure->dfgShouldWatch())
103 return false;
104 addLazily(structure->transitionWatchpointSet());
105 return true;
106}
107
108void DesiredWatchpoints::reallyAdd(CodeBlock* codeBlock, CommonData& commonData)
109{
110 m_sets.reallyAdd(codeBlock, commonData);
111 m_inlineSets.reallyAdd(codeBlock, commonData);
112 m_inferredValues.reallyAdd(codeBlock, commonData);
113 m_bufferViews.reallyAdd(codeBlock, commonData);
114 m_adaptiveStructureSets.reallyAdd(codeBlock, commonData);
115}
116
117bool DesiredWatchpoints::areStillValid() const
118{
119 return m_sets.areStillValid()
120 && m_inlineSets.areStillValid()
121 && m_inferredValues.areStillValid()
122 && m_bufferViews.areStillValid()
123 && m_adaptiveStructureSets.areStillValid();
124}
125
126void DesiredWatchpoints::dumpInContext(PrintStream& out, DumpContext* context) const
127{
128 out.print("Desired watchpoints:\n");
129 out.print(" Watchpoint sets: ", inContext(m_sets, context), "\n");
130 out.print(" Inline watchpoint sets: ", inContext(m_inlineSets, context), "\n");
131 out.print(" Inferred values: ", inContext(m_inferredValues, context), "\n");
132 out.print(" Buffer views: ", inContext(m_bufferViews, context), "\n");
133 out.print(" Object property conditions: ", inContext(m_adaptiveStructureSets, context), "\n");
134}
135
136} } // namespace JSC::DFG
137
138#endif // ENABLE(DFG_JIT)
139
140