| 1 | /*
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| 2 | * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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| 14 | * its contributors may be used to endorse or promote products derived
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| 15 | * from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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| 18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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| 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef JSActivation_h
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| 30 | #define JSActivation_h
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| 31 |
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| 32 | #include "CodeBlock.h"
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| 33 | #include "JSVariableObject.h"
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| 34 | #include "RegisterFile.h"
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| 35 | #include "SymbolTable.h"
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| 36 | #include "Nodes.h"
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| 37 |
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| 38 | namespace JSC {
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| 39 |
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| 40 | class Arguments;
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| 41 | class Register;
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| 42 |
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| 43 | class JSActivation : public JSVariableObject {
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| 44 | typedef JSVariableObject Base;
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| 45 | public:
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| 46 | JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>);
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| 47 | virtual ~JSActivation();
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| 48 |
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| 49 | virtual void markChildren(MarkStack&);
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| 50 |
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| 51 | virtual bool isDynamicScope() const;
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| 52 |
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| 53 | virtual bool isActivationObject() const { return true; }
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| 54 |
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| 55 | virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
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| 56 |
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| 57 | virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
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| 58 |
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| 59 | virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
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| 60 | virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
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| 61 |
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| 62 | virtual JSObject* toThisObject(ExecState*) const;
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| 63 |
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| 64 | void copyRegisters(Arguments* arguments);
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| 65 |
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| 66 | virtual const ClassInfo* classInfo() const { return &info; }
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| 67 | static const ClassInfo info;
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| 68 |
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| 69 | static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags)); }
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| 70 |
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| 71 | protected:
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| 72 | static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
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| 73 |
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| 74 | private:
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| 75 | struct JSActivationData : public JSVariableObjectData {
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| 76 | JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers)
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| 77 | : JSVariableObjectData(_functionExecutable->generatedBytecode().symbolTable(), registers)
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| 78 | , functionExecutable(_functionExecutable)
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| 79 | {
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| 80 | // We have to manually ref and deref the symbol table as JSVariableObjectData
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| 81 | // doesn't know about SharedSymbolTable
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| 82 | functionExecutable->generatedBytecode().sharedSymbolTable()->ref();
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| 83 | }
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| 84 | ~JSActivationData()
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| 85 | {
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| 86 | static_cast<SharedSymbolTable*>(symbolTable)->deref();
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| 87 | }
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| 88 |
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| 89 | RefPtr<FunctionExecutable> functionExecutable;
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| 90 | };
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| 91 |
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| 92 | static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&);
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| 93 | NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter();
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| 94 |
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| 95 | JSActivationData* d() const { return static_cast<JSActivationData*>(JSVariableObject::d); }
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| 96 | };
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| 97 |
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| 98 | JSActivation* asActivation(JSValue);
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| 99 |
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| 100 | inline JSActivation* asActivation(JSValue value)
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| 101 | {
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| 102 | ASSERT(asObject(value)->inherits(&JSActivation::info));
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| 103 | return static_cast<JSActivation*>(asObject(value));
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| 104 | }
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| 105 |
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| 106 | } // namespace JSC
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| 107 |
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| 108 | #endif // JSActivation_h
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