author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 09:02:29 +0300 | |
changeset 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2007 Eric Seidel <eric@webkit.org> |
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* Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef JSGlobalObject_h |
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#define JSGlobalObject_h |
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#include "JSArray.h" |
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#include "JSGlobalData.h" |
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#include "JSVariableObject.h" |
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#include "JSWeakObjectMapRefInternal.h" |
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#include "NativeFunctionWrapper.h" |
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#include "NumberPrototype.h" |
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#include "StringPrototype.h" |
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#include <wtf/HashSet.h> |
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#include <wtf/OwnPtr.h> |
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namespace JSC { |
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class ArrayPrototype; |
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class BooleanPrototype; |
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class DatePrototype; |
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class Debugger; |
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class ErrorConstructor; |
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class FunctionPrototype; |
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class GlobalCodeBlock; |
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class GlobalEvalFunction; |
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class NativeErrorConstructor; |
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class ProgramCodeBlock; |
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class PrototypeFunction; |
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class RegExpConstructor; |
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class RegExpPrototype; |
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class RegisterFile; |
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struct ActivationStackNode; |
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struct HashTable; |
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typedef Vector<ExecState*, 16> ExecStateStack; |
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class JSGlobalObject : public JSVariableObject { |
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protected: |
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using JSVariableObject::JSVariableObjectData; |
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typedef HashSet<RefPtr<OpaqueJSWeakObjectMap> > WeakMapSet; |
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struct JSGlobalObjectData : public JSVariableObjectData { |
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// We use an explicit destructor function pointer instead of a |
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// virtual destructor because we want to avoid adding a vtable |
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// pointer to this struct. Adding a vtable pointer would force the |
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// compiler to emit costly pointer fixup code when casting from |
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// JSVariableObjectData* to JSGlobalObjectData*. |
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typedef void (*Destructor)(void*); |
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JSGlobalObjectData(Destructor destructor) |
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: JSVariableObjectData(&symbolTable, 0) |
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, destructor(destructor) |
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, registerArraySize(0) |
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, globalScopeChain(NoScopeChain()) |
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, regExpConstructor(0) |
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, errorConstructor(0) |
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, evalErrorConstructor(0) |
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, rangeErrorConstructor(0) |
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, referenceErrorConstructor(0) |
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, syntaxErrorConstructor(0) |
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, typeErrorConstructor(0) |
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, URIErrorConstructor(0) |
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, evalFunction(0) |
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, callFunction(0) |
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, applyFunction(0) |
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, objectPrototype(0) |
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, functionPrototype(0) |
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, arrayPrototype(0) |
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, booleanPrototype(0) |
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, stringPrototype(0) |
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, numberPrototype(0) |
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, datePrototype(0) |
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, regExpPrototype(0) |
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, methodCallDummy(0) |
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{ |
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} |
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Destructor destructor; |
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size_t registerArraySize; |
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JSGlobalObject* next; |
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JSGlobalObject* prev; |
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Debugger* debugger; |
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ScopeChain globalScopeChain; |
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Register globalCallFrame[RegisterFile::CallFrameHeaderSize]; |
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int recursion; |
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RegExpConstructor* regExpConstructor; |
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ErrorConstructor* errorConstructor; |
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NativeErrorConstructor* evalErrorConstructor; |
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NativeErrorConstructor* rangeErrorConstructor; |
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NativeErrorConstructor* referenceErrorConstructor; |
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NativeErrorConstructor* syntaxErrorConstructor; |
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NativeErrorConstructor* typeErrorConstructor; |
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NativeErrorConstructor* URIErrorConstructor; |
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GlobalEvalFunction* evalFunction; |
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NativeFunctionWrapper* callFunction; |
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NativeFunctionWrapper* applyFunction; |
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ObjectPrototype* objectPrototype; |
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FunctionPrototype* functionPrototype; |
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ArrayPrototype* arrayPrototype; |
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BooleanPrototype* booleanPrototype; |
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StringPrototype* stringPrototype; |
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NumberPrototype* numberPrototype; |
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DatePrototype* datePrototype; |
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RegExpPrototype* regExpPrototype; |
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JSObject* methodCallDummy; |
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RefPtr<Structure> argumentsStructure; |
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RefPtr<Structure> arrayStructure; |
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RefPtr<Structure> booleanObjectStructure; |
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RefPtr<Structure> callbackConstructorStructure; |
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RefPtr<Structure> callbackFunctionStructure; |
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RefPtr<Structure> callbackObjectStructure; |
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RefPtr<Structure> dateStructure; |
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RefPtr<Structure> emptyObjectStructure; |
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RefPtr<Structure> errorStructure; |
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RefPtr<Structure> functionStructure; |
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RefPtr<Structure> numberObjectStructure; |
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RefPtr<Structure> prototypeFunctionStructure; |
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RefPtr<Structure> regExpMatchesArrayStructure; |
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RefPtr<Structure> regExpStructure; |
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RefPtr<Structure> stringObjectStructure; |
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SymbolTable symbolTable; |
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unsigned profileGroup; |
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RefPtr<JSGlobalData> globalData; |
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HashSet<GlobalCodeBlock*> codeBlocks; |
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WeakMapSet weakMaps; |
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}; |
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public: |
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void* operator new(size_t, JSGlobalData*); |
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explicit JSGlobalObject() |
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: JSVariableObject(JSGlobalObject::createStructure(jsNull()), new JSGlobalObjectData(destroyJSGlobalObjectData)) |
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{ |
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COMPILE_ASSERT(JSGlobalObject::AnonymousSlotCount == 1, JSGlobalObject_has_only_a_single_slot); |
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putAnonymousValue(0, this); |
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init(this); |
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} |
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explicit JSGlobalObject(NonNullPassRefPtr<Structure> structure) |
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: JSVariableObject(structure, new JSGlobalObjectData(destroyJSGlobalObjectData)) |
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{ |
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COMPILE_ASSERT(JSGlobalObject::AnonymousSlotCount == 1, JSGlobalObject_has_only_a_single_slot); |
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putAnonymousValue(0, this); |
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init(this); |
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} |
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protected: |
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JSGlobalObject(NonNullPassRefPtr<Structure> structure, JSGlobalObjectData* data, JSObject* thisValue) |
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: JSVariableObject(structure, data) |
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{ |
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COMPILE_ASSERT(JSGlobalObject::AnonymousSlotCount == 1, JSGlobalObject_has_only_a_single_slot); |
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putAnonymousValue(0, this); |
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init(thisValue); |
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} |
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public: |
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virtual ~JSGlobalObject(); |
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virtual void markChildren(MarkStack&); |
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virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&); |
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virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); |
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virtual bool hasOwnPropertyForWrite(ExecState*, const Identifier&); |
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virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&); |
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virtual void putWithAttributes(ExecState*, const Identifier& propertyName, JSValue value, unsigned attributes); |
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virtual void defineGetter(ExecState*, const Identifier& propertyName, JSObject* getterFunc, unsigned attributes); |
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virtual void defineSetter(ExecState*, const Identifier& propertyName, JSObject* setterFunc, unsigned attributes); |
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// Linked list of all global objects that use the same JSGlobalData. |
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JSGlobalObject*& head() { return d()->globalData->head; } |
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JSGlobalObject* next() { return d()->next; } |
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// The following accessors return pristine values, even if a script |
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// replaces the global object's associated property. |
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RegExpConstructor* regExpConstructor() const { return d()->regExpConstructor; } |
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ErrorConstructor* errorConstructor() const { return d()->errorConstructor; } |
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NativeErrorConstructor* evalErrorConstructor() const { return d()->evalErrorConstructor; } |
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NativeErrorConstructor* rangeErrorConstructor() const { return d()->rangeErrorConstructor; } |
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NativeErrorConstructor* referenceErrorConstructor() const { return d()->referenceErrorConstructor; } |
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NativeErrorConstructor* syntaxErrorConstructor() const { return d()->syntaxErrorConstructor; } |
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NativeErrorConstructor* typeErrorConstructor() const { return d()->typeErrorConstructor; } |
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NativeErrorConstructor* URIErrorConstructor() const { return d()->URIErrorConstructor; } |
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GlobalEvalFunction* evalFunction() const { return d()->evalFunction; } |
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ObjectPrototype* objectPrototype() const { return d()->objectPrototype; } |
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FunctionPrototype* functionPrototype() const { return d()->functionPrototype; } |
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ArrayPrototype* arrayPrototype() const { return d()->arrayPrototype; } |
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BooleanPrototype* booleanPrototype() const { return d()->booleanPrototype; } |
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StringPrototype* stringPrototype() const { return d()->stringPrototype; } |
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NumberPrototype* numberPrototype() const { return d()->numberPrototype; } |
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DatePrototype* datePrototype() const { return d()->datePrototype; } |
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RegExpPrototype* regExpPrototype() const { return d()->regExpPrototype; } |
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JSObject* methodCallDummy() const { return d()->methodCallDummy; } |
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Structure* argumentsStructure() const { return d()->argumentsStructure.get(); } |
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Structure* arrayStructure() const { return d()->arrayStructure.get(); } |
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Structure* booleanObjectStructure() const { return d()->booleanObjectStructure.get(); } |
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Structure* callbackConstructorStructure() const { return d()->callbackConstructorStructure.get(); } |
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Structure* callbackFunctionStructure() const { return d()->callbackFunctionStructure.get(); } |
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Structure* callbackObjectStructure() const { return d()->callbackObjectStructure.get(); } |
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Structure* dateStructure() const { return d()->dateStructure.get(); } |
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Structure* emptyObjectStructure() const { return d()->emptyObjectStructure.get(); } |
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Structure* errorStructure() const { return d()->errorStructure.get(); } |
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Structure* functionStructure() const { return d()->functionStructure.get(); } |
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Structure* numberObjectStructure() const { return d()->numberObjectStructure.get(); } |
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Structure* prototypeFunctionStructure() const { return d()->prototypeFunctionStructure.get(); } |
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Structure* regExpMatchesArrayStructure() const { return d()->regExpMatchesArrayStructure.get(); } |
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Structure* regExpStructure() const { return d()->regExpStructure.get(); } |
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Structure* stringObjectStructure() const { return d()->stringObjectStructure.get(); } |
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|
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void setProfileGroup(unsigned value) { d()->profileGroup = value; } |
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unsigned profileGroup() const { return d()->profileGroup; } |
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Debugger* debugger() const { return d()->debugger; } |
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void setDebugger(Debugger* debugger) { d()->debugger = debugger; } |
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virtual bool supportsProfiling() const { return false; } |
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int recursion() { return d()->recursion; } |
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void incRecursion() { ++d()->recursion; } |
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void decRecursion() { --d()->recursion; } |
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ScopeChain& globalScopeChain() { return d()->globalScopeChain; } |
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virtual bool isGlobalObject() const { return true; } |
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virtual ExecState* globalExec(); |
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virtual bool shouldInterruptScript() const { return true; } |
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virtual bool allowsAccessFrom(const JSGlobalObject*) const { return true; } |
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virtual bool isDynamicScope(bool& requiresDynamicChecks) const; |
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HashSet<GlobalCodeBlock*>& codeBlocks() { return d()->codeBlocks; } |
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void copyGlobalsFrom(RegisterFile&); |
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void copyGlobalsTo(RegisterFile&); |
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void resetPrototype(JSValue prototype); |
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JSGlobalData* globalData() { return d()->globalData.get(); } |
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JSGlobalObjectData* d() const { return static_cast<JSGlobalObjectData*>(JSVariableObject::d); } |
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static PassRefPtr<Structure> createStructure(JSValue prototype) |
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{ |
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return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); |
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} |
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void registerWeakMap(OpaqueJSWeakObjectMap* map) |
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{ |
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d()->weakMaps.add(map); |
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} |
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void deregisterWeakMap(OpaqueJSWeakObjectMap* map) |
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{ |
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d()->weakMaps.remove(map); |
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} |
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protected: |
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static const unsigned AnonymousSlotCount = JSVariableObject::AnonymousSlotCount + 1; |
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static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags; |
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struct GlobalPropertyInfo { |
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GlobalPropertyInfo(const Identifier& i, JSValue v, unsigned a) |
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: identifier(i) |
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, value(v) |
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, attributes(a) |
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{ |
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} |
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|
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const Identifier identifier; |
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JSValue value; |
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unsigned attributes; |
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}; |
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void addStaticGlobals(GlobalPropertyInfo*, int count); |
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316 |
|
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private: |
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static void destroyJSGlobalObjectData(void*); |
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319 |
|
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// FIXME: Fold reset into init. |
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void init(JSObject* thisValue); |
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void reset(JSValue prototype); |
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323 |
|
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void setRegisters(Register* registers, Register* registerArray, size_t count); |
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325 |
|
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void* operator new(size_t); // can only be allocated with JSGlobalData |
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}; |
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|
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JSGlobalObject* asGlobalObject(JSValue); |
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330 |
|
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inline JSGlobalObject* asGlobalObject(JSValue value) |
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332 |
{ |
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ASSERT(asObject(value)->isGlobalObject()); |
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return static_cast<JSGlobalObject*>(asObject(value)); |
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} |
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336 |
|
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inline void JSGlobalObject::setRegisters(Register* registers, Register* registerArray, size_t count) |
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338 |
{ |
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JSVariableObject::setRegisters(registers, registerArray); |
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d()->registerArraySize = count; |
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} |
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342 |
|
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inline void JSGlobalObject::addStaticGlobals(GlobalPropertyInfo* globals, int count) |
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344 |
{ |
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size_t oldSize = d()->registerArraySize; |
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size_t newSize = oldSize + count; |
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Register* registerArray = new Register[newSize]; |
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if (d()->registerArray) |
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memcpy(registerArray + count, d()->registerArray.get(), oldSize * sizeof(Register)); |
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setRegisters(registerArray + newSize, registerArray, newSize); |
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351 |
|
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for (int i = 0, index = -static_cast<int>(oldSize) - 1; i < count; ++i, --index) { |
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GlobalPropertyInfo& global = globals[i]; |
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ASSERT(global.attributes & DontDelete); |
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SymbolTableEntry newEntry(index, global.attributes); |
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symbolTable().add(global.identifier.ustring().rep(), newEntry); |
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registerAt(index) = global.value; |
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} |
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} |
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360 |
|
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inline bool JSGlobalObject::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) |
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362 |
{ |
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if (JSVariableObject::getOwnPropertySlot(exec, propertyName, slot)) |
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return true; |
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return symbolTableGet(propertyName, slot); |
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} |
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367 |
|
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inline bool JSGlobalObject::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor) |
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369 |
{ |
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if (symbolTableGet(propertyName, descriptor)) |
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return true; |
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return JSVariableObject::getOwnPropertyDescriptor(exec, propertyName, descriptor); |
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} |
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|
374 |
|
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inline bool JSGlobalObject::hasOwnPropertyForWrite(ExecState* exec, const Identifier& propertyName) |
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376 |
{ |
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PropertySlot slot; |
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if (JSVariableObject::getOwnPropertySlot(exec, propertyName, slot)) |
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return true; |
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bool slotIsWriteable; |
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return symbolTableGet(propertyName, slot, slotIsWriteable); |
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382 |
} |
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|
383 |
|
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inline JSValue Structure::prototypeForLookup(ExecState* exec) const |
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385 |
{ |
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if (typeInfo().type() == ObjectType) |
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return m_prototype; |
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|
388 |
|
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#if USE(JSVALUE32) |
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if (typeInfo().type() == StringType) |
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return exec->lexicalGlobalObject()->stringPrototype(); |
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392 |
|
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ASSERT(typeInfo().type() == NumberType); |
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return exec->lexicalGlobalObject()->numberPrototype(); |
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#else |
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396 |
ASSERT(typeInfo().type() == StringType); |
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397 |
return exec->lexicalGlobalObject()->stringPrototype(); |
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#endif |
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399 |
} |
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|
400 |
|
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401 |
inline StructureChain* Structure::prototypeChain(ExecState* exec) const |
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402 |
{ |
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403 |
// We cache our prototype chain so our clients can share it. |
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404 |
if (!isValid(exec, m_cachedPrototypeChain.get())) { |
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JSValue prototype = prototypeForLookup(exec); |
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|
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m_cachedPrototypeChain = StructureChain::create(prototype.isNull() ? 0 : asObject(prototype)->structure()); |
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|
407 |
} |
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408 |
return m_cachedPrototypeChain.get(); |
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|
409 |
} |
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|
410 |
|
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|
411 |
inline bool Structure::isValid(ExecState* exec, StructureChain* cachedPrototypeChain) const |
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|
412 |
{ |
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|
413 |
if (!cachedPrototypeChain) |
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|
414 |
return false; |
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|
415 |
|
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|
416 |
JSValue prototype = prototypeForLookup(exec); |
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|
417 |
RefPtr<Structure>* cachedStructure = cachedPrototypeChain->head(); |
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|
418 |
while(*cachedStructure && !prototype.isNull()) { |
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|
419 |
if (asObject(prototype)->structure() != *cachedStructure) |
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|
420 |
return false; |
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|
421 |
++cachedStructure; |
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|
422 |
prototype = asObject(prototype)->prototype(); |
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|
423 |
} |
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|
424 |
return prototype.isNull() && !*cachedStructure; |
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|
425 |
} |
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diff
changeset
|
426 |
|
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|
427 |
inline JSGlobalObject* ExecState::dynamicGlobalObject() |
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|
428 |
{ |
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|
429 |
if (this == lexicalGlobalObject()->globalExec()) |
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|
430 |
return lexicalGlobalObject(); |
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|
431 |
|
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|
432 |
// For any ExecState that's not a globalExec, the |
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|
433 |
// dynamic global object must be set since code is running |
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|
434 |
ASSERT(globalData().dynamicGlobalObject); |
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|
435 |
return globalData().dynamicGlobalObject; |
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|
436 |
} |
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|
437 |
|
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|
438 |
inline JSObject* constructEmptyObject(ExecState* exec) |
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|
439 |
{ |
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Revision: 201037
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|
440 |
return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure()); |
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|
441 |
} |
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|
442 |
|
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|
443 |
inline JSObject* constructEmptyObject(ExecState* exec, JSGlobalObject* globalObject) |
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|
444 |
{ |
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|
445 |
return new (exec) JSObject(globalObject->emptyObjectStructure()); |
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|
446 |
} |
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|
447 |
|
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Revision: 201037
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|
448 |
inline JSArray* constructEmptyArray(ExecState* exec) |
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|
449 |
{ |
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|
450 |
return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure()); |
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|
451 |
} |
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|
452 |
|
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|
453 |
inline JSArray* constructEmptyArray(ExecState* exec, JSGlobalObject* globalObject) |
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|
454 |
{ |
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Revision: 201037
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|
455 |
return new (exec) JSArray(globalObject->arrayStructure()); |
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|
456 |
} |
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|
457 |
|
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Revision: 201037
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|
458 |
inline JSArray* constructEmptyArray(ExecState* exec, unsigned initialLength) |
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|
459 |
{ |
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Revision: 201037
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|
460 |
return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), initialLength, CreateInitialized); |
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|
461 |
} |
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Revision: 201037
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|
462 |
|
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Revision: 201037
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|
463 |
inline JSArray* constructArray(ExecState* exec, JSValue singleItemValue) |
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|
464 |
{ |
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Revision: 201037
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|
465 |
MarkedArgumentBuffer values; |
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|
466 |
values.append(singleItemValue); |
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|
467 |
return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), values); |
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|
468 |
} |
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changeset
|
469 |
|
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Revision: 201037
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|
470 |
inline JSArray* constructArray(ExecState* exec, const ArgList& values) |
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|
471 |
{ |
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|
472 |
return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), values); |
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|
473 |
} |
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|
474 |
|
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Revision: 201037
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|
475 |
class DynamicGlobalObjectScope : public Noncopyable { |
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|
476 |
public: |
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Revision: 201037
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|
477 |
DynamicGlobalObjectScope(CallFrame* callFrame, JSGlobalObject* dynamicGlobalObject) |
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|
478 |
: m_dynamicGlobalObjectSlot(callFrame->globalData().dynamicGlobalObject) |
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Revision: 201037
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|
479 |
, m_savedDynamicGlobalObject(m_dynamicGlobalObjectSlot) |
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|
480 |
{ |
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Revision: 201037
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|
481 |
if (!m_dynamicGlobalObjectSlot) { |
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Revision: 201037
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|
482 |
m_dynamicGlobalObjectSlot = dynamicGlobalObject; |
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|
483 |
|
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Revision: 201037
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|
484 |
// Reset the date cache between JS invocations to force the VM |
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Revision: 201037
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|
485 |
// to observe time zone changes. |
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Revision: 201037
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|
486 |
callFrame->globalData().resetDateCache(); |
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|
487 |
} |
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|
488 |
} |
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|
489 |
|
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Revision: 201037
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|
490 |
~DynamicGlobalObjectScope() |
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|
491 |
{ |
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Revision: 201037
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|
492 |
m_dynamicGlobalObjectSlot = m_savedDynamicGlobalObject; |
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|
493 |
} |
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|
494 |
|
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Revision: 201037
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|
495 |
private: |
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Revision: 201037
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|
496 |
JSGlobalObject*& m_dynamicGlobalObjectSlot; |
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|
497 |
JSGlobalObject* m_savedDynamicGlobalObject; |
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|
498 |
}; |
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|
499 |
|
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Revision: 201037
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|
500 |
} // namespace JSC |
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|
501 |
|
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Revision: 201037
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|
502 |
#endif // JSGlobalObject_h |