1 /* 2 * Copyright (C) 2008, 2009 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef JSActivation_h 30 #define JSActivation_h 31 32 #include "CodeBlock.h" 33 #include "JSVariableObject.h" 34 #include "RegisterFile.h" 35 #include "SymbolTable.h" 36 #include "Nodes.h" 37 38 namespace JSC { 39 40 class Arguments; 41 class Register; 42 43 class JSActivation : public JSVariableObject { 44 typedef JSVariableObject Base; 45 public: 46 JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>); 47 virtual ~JSActivation(); 48 49 virtual void markChildren(MarkStack&); 50 51 virtual bool isDynamicScope() const; 52 isActivationObject()53 virtual bool isActivationObject() const { return true; } 54 55 virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&); 56 57 virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&); 58 59 virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes); 60 virtual bool deleteProperty(ExecState*, const Identifier& propertyName); 61 62 virtual JSObject* toThisObject(ExecState*) const; 63 64 void copyRegisters(Arguments* arguments); 65 classInfo()66 virtual const ClassInfo* classInfo() const { return &info; } 67 static const ClassInfo info; 68 createStructure(JSValue proto)69 static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); } 70 71 protected: 72 static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags; 73 74 private: 75 struct JSActivationData : public JSVariableObjectData { JSActivationDataJSActivationData76 JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers) 77 : JSVariableObjectData(_functionExecutable->generatedBytecode().symbolTable(), registers) 78 , functionExecutable(_functionExecutable) 79 { 80 // We have to manually ref and deref the symbol table as JSVariableObjectData 81 // doesn't know about SharedSymbolTable 82 functionExecutable->generatedBytecode().sharedSymbolTable()->ref(); 83 } ~JSActivationDataJSActivationData84 ~JSActivationData() 85 { 86 static_cast<SharedSymbolTable*>(symbolTable)->deref(); 87 } 88 89 RefPtr<FunctionExecutable> functionExecutable; 90 }; 91 92 static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&); 93 NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter(); 94 d()95 JSActivationData* d() const { return static_cast<JSActivationData*>(JSVariableObject::d); } 96 }; 97 98 JSActivation* asActivation(JSValue); 99 asActivation(JSValue value)100 inline JSActivation* asActivation(JSValue value) 101 { 102 ASSERT(asObject(value)->inherits(&JSActivation::info)); 103 return static_cast<JSActivation*>(asObject(value)); 104 } 105 106 } // namespace JSC 107 108 #endif // JSActivation_h 109