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 "SymbolTable.h" 35 #include "Nodes.h" 36 37 namespace JSC { 38 39 class Arguments; 40 class Register; 41 42 class JSActivation : public JSVariableObject { 43 typedef JSVariableObject Base; 44 public: 45 JSActivation(CallFrame*, FunctionExecutable*); 46 virtual ~JSActivation(); 47 48 virtual void markChildren(MarkStack&); 49 50 virtual bool isDynamicScope(bool& requiresDynamicChecks) const; 51 isActivationObject()52 virtual bool isActivationObject() const { return true; } 53 54 virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&); 55 virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode); 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 virtual JSValue toStrictThisObject(ExecState*) const; 64 65 void copyRegisters(JSGlobalData&); 66 67 static const ClassInfo s_info; 68 createStructure(JSGlobalData & globalData,JSValue proto)69 static Structure* createStructure(JSGlobalData& globalData, JSValue proto) { return Structure::create(globalData, proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info); } 70 71 protected: 72 static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags; 73 74 private: 75 bool symbolTableGet(const Identifier&, PropertySlot&); 76 bool symbolTableGet(const Identifier&, PropertyDescriptor&); 77 bool symbolTableGet(const Identifier&, PropertySlot&, bool& slotIsWriteable); 78 bool symbolTablePut(JSGlobalData&, const Identifier&, JSValue); 79 bool symbolTablePutWithAttributes(JSGlobalData&, const Identifier&, JSValue, unsigned attributes); 80 81 static JSValue argumentsGetter(ExecState*, JSValue, const Identifier&); 82 NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter(); 83 84 int m_numParametersMinusThis; 85 int m_numCapturedVars : 31; 86 bool m_requiresDynamicChecks : 1; 87 int m_argumentsRegister; 88 }; 89 90 JSActivation* asActivation(JSValue); 91 asActivation(JSValue value)92 inline JSActivation* asActivation(JSValue value) 93 { 94 ASSERT(asObject(value)->inherits(&JSActivation::s_info)); 95 return static_cast<JSActivation*>(asObject(value)); 96 } 97 activation()98 ALWAYS_INLINE JSActivation* Register::activation() const 99 { 100 return asActivation(jsValue()); 101 } 102 103 } // namespace JSC 104 105 #endif // JSActivation_h 106