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29 #ifndef JSActivation_h
30 #define JSActivation_h
32 #include "CodeBlock.h"
33 #include "JSVariableObject.h"
34 #include "SymbolTable.h"
42 class JSActivation : public JSVariableObject {
44 JSActivation(CallFrame*, FunctionExecutable*);
47 typedef JSVariableObject Base;
49 static JSActivation* create(JSGlobalData& globalData, CallFrame* callFrame, FunctionExecutable* funcExec)
51 JSActivation* activation = new (allocateCell<JSActivation>(globalData.heap)) JSActivation(callFrame, funcExec);
52 activation->finishCreation(callFrame);
56 virtual ~JSActivation();
58 virtual void visitChildren(SlotVisitor&);
60 virtual bool isDynamicScope(bool& requiresDynamicChecks) const;
62 virtual bool isActivationObject() const { return true; }
64 virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
65 virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode);
67 virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
69 virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
70 virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
72 virtual JSObject* toThisObject(ExecState*) const;
73 virtual JSValue toStrictThisObject(ExecState*) const;
75 void copyRegisters(JSGlobalData&);
77 static const ClassInfo s_info;
79 static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto) { return Structure::create(globalData, globalObject, proto, TypeInfo(ObjectType, StructureFlags), &s_info); }
82 void finishCreation(CallFrame*);
83 static const unsigned StructureFlags = IsEnvironmentRecord | OverridesGetOwnPropertySlot | OverridesVisitChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
86 bool symbolTableGet(const Identifier&, PropertySlot&);
87 bool symbolTableGet(const Identifier&, PropertyDescriptor&);
88 bool symbolTableGet(const Identifier&, PropertySlot&, bool& slotIsWriteable);
89 bool symbolTablePut(JSGlobalData&, const Identifier&, JSValue);
90 bool symbolTablePutWithAttributes(JSGlobalData&, const Identifier&, JSValue, unsigned attributes);
92 static JSValue argumentsGetter(ExecState*, JSValue, const Identifier&);
93 NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter();
95 int m_numParametersMinusThis;
96 int m_numCapturedVars : 31;
97 bool m_requiresDynamicChecks : 1;
98 int m_argumentsRegister;
101 JSActivation* asActivation(JSValue);
103 inline JSActivation* asActivation(JSValue value)
105 ASSERT(asObject(value)->inherits(&JSActivation::s_info));
106 return static_cast<JSActivation*>(asObject(value));
109 ALWAYS_INLINE JSActivation* Register::activation() const
111 return asActivation(jsValue());
116 #endif // JSActivation_h