JSC should support SharedArrayBuffer
[WebKit-https.git] / Source / JavaScriptCore / dfg / DFGDesiredWatchpoints.cpp
1 /*
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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, CommonData& common)
39 {
40     Watchpoint* watchpoint = common.watchpoints.add(codeBlock);
41     ArrayBufferNeuteringWatchpoint* neuteringWatchpoint =
42         ArrayBufferNeuteringWatchpoint::create(*codeBlock->vm());
43     neuteringWatchpoint->set()->add(watchpoint);
44     codeBlock->addConstant(neuteringWatchpoint);
45     // FIXME: We don't need to set this watchpoint at all for shared buffers.
46     // https://bugs.webkit.org/show_bug.cgi?id=164108
47     codeBlock->vm()->heap.addReference(neuteringWatchpoint, view->possiblySharedBuffer());
48 }
49
50 void InferredValueAdaptor::add(
51     CodeBlock* codeBlock, InferredValue* inferredValue, CommonData& common)
52 {
53     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.
54     inferredValue->add(common.watchpoints.add(codeBlock));
55 }
56
57 void AdaptiveStructureWatchpointAdaptor::add(
58     CodeBlock* codeBlock, const ObjectPropertyCondition& key, CommonData& common)
59 {
60     switch (key.kind()) {
61     case PropertyCondition::Equivalence:
62         common.adaptiveInferredPropertyValueWatchpoints.add(key, codeBlock)->install();
63         break;
64     default:
65         common.adaptiveStructureWatchpoints.add(key, codeBlock)->install();
66         break;
67     }
68 }
69
70 void InferredTypeAdaptor::add(CodeBlock* codeBlock, const DesiredInferredType& key, CommonData& common)
71 {
72     key.add(common.watchpoints.add(codeBlock));
73 }
74
75 DesiredWatchpoints::DesiredWatchpoints() { }
76 DesiredWatchpoints::~DesiredWatchpoints() { }
77
78 void DesiredWatchpoints::addLazily(WatchpointSet* set)
79 {
80     m_sets.addLazily(set);
81 }
82
83 void DesiredWatchpoints::addLazily(InlineWatchpointSet& set)
84 {
85     m_inlineSets.addLazily(&set);
86 }
87
88 void DesiredWatchpoints::addLazily(InferredValue* inferredValue)
89 {
90     m_inferredValues.addLazily(inferredValue);
91 }
92
93 void DesiredWatchpoints::addLazily(JSArrayBufferView* view)
94 {
95     m_bufferViews.addLazily(view);
96 }
97
98 void DesiredWatchpoints::addLazily(const ObjectPropertyCondition& key)
99 {
100     m_adaptiveStructureSets.addLazily(key);
101 }
102
103 void DesiredWatchpoints::addLazily(const DesiredInferredType& key)
104 {
105     m_inferredTypes.addLazily(key);
106 }
107
108 bool DesiredWatchpoints::consider(Structure* structure)
109 {
110     if (!structure->dfgShouldWatch())
111         return false;
112     addLazily(structure->transitionWatchpointSet());
113     return true;
114 }
115
116 void DesiredWatchpoints::reallyAdd(CodeBlock* codeBlock, CommonData& commonData)
117 {
118     m_sets.reallyAdd(codeBlock, commonData);
119     m_inlineSets.reallyAdd(codeBlock, commonData);
120     m_inferredValues.reallyAdd(codeBlock, commonData);
121     m_bufferViews.reallyAdd(codeBlock, commonData);
122     m_adaptiveStructureSets.reallyAdd(codeBlock, commonData);
123     m_inferredTypes.reallyAdd(codeBlock, commonData);
124 }
125
126 bool DesiredWatchpoints::areStillValid() const
127 {
128     return m_sets.areStillValid()
129         && m_inlineSets.areStillValid()
130         && m_inferredValues.areStillValid()
131         && m_bufferViews.areStillValid()
132         && m_adaptiveStructureSets.areStillValid()
133         && m_inferredTypes.areStillValid();
134 }
135
136 void DesiredWatchpoints::dumpInContext(PrintStream& out, DumpContext* context) const
137 {
138     out.print("Desired watchpoints:\n");
139     out.print("    Watchpoint sets: ", inContext(m_sets, context), "\n");
140     out.print("    Inline watchpoint sets: ", inContext(m_inlineSets, context), "\n");
141     out.print("    Inferred values: ", inContext(m_inferredValues, context), "\n");
142     out.print("    Buffer views: ", inContext(m_bufferViews, context), "\n");
143     out.print("    Object property conditions: ", inContext(m_adaptiveStructureSets, context), "\n");
144     out.print("    Inferred types: ", inContext(m_inferredTypes, context), "\n");
145 }
146
147 } } // namespace JSC::DFG
148
149 #endif // ENABLE(DFG_JIT)
150