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diff --git a/JavaScriptCore/runtime/JSGlobalData.h b/JavaScriptCore/runtime/JSGlobalData.h
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+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer. 
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef JSGlobalData_h
+#define JSGlobalData_h
+
+#include <wtf/Forward.h>
+#include <wtf/HashMap.h>
+#include <wtf/RefCounted.h>
+#include "collector.h"
+#include "SmallStrings.h"
+
+struct OpaqueJSClass;
+struct OpaqueJSClassContextData;
+
+namespace JSC {
+
+    class ArgList;
+    class CommonIdentifiers;
+    class Heap;
+    class IdentifierTable;
+    class JSGlobalObject;
+    class JSObject;
+    class Lexer;
+    class Machine;
+    class Parser;
+    class ParserRefCounted;
+    class StructureID;
+    class UString;
+    struct HashTable;
+
+    class JSGlobalData : public RefCounted<JSGlobalData> {
+    public:
+        static bool sharedInstanceExists();
+        static JSGlobalData& sharedInstance();
+
+        static PassRefPtr<JSGlobalData> create();
+        static PassRefPtr<JSGlobalData> createLeaked();
+        ~JSGlobalData();
+
+        Machine* machine;
+
+        JSValue* exception;
+#if ENABLE(CTI)
+        void* throwReturnAddress;
+#endif
+
+        const HashTable* arrayTable;
+        const HashTable* dateTable;
+        const HashTable* mathTable;
+        const HashTable* numberTable;
+        const HashTable* regExpTable;
+        const HashTable* regExpConstructorTable;
+        const HashTable* stringTable;
+        
+        RefPtr<StructureID> activationStructureID;
+        RefPtr<StructureID> interruptedExecutionErrorStructure;
+        RefPtr<StructureID> staticScopeStructureID;
+        RefPtr<StructureID> stringStructureID;
+        RefPtr<StructureID> notAnObjectErrorStubStructure;
+        RefPtr<StructureID> notAnObjectStructure;
+        RefPtr<StructureID> numberStructureID;
+
+        IdentifierTable* identifierTable;
+        CommonIdentifiers* propertyNames;
+        const ArgList* emptyList; // Lists are supposed to be allocated on the stack to have their elements properly marked, which is not the case here - but this list has nothing to mark.
+
+        SmallStrings smallStrings;
+        
+        HashMap<OpaqueJSClass*, OpaqueJSClassContextData*> opaqueJSClassData;
+
+        HashSet<ParserRefCounted*>* newParserObjects;
+        HashCountedSet<ParserRefCounted*>* parserObjectExtraRefCounts;
+
+        Lexer* lexer;
+        Parser* parser;
+
+        JSGlobalObject* head;
+        JSGlobalObject* dynamicGlobalObject;
+
+        bool isSharedInstance;
+
+        struct ClientData {
+            virtual ~ClientData() = 0;
+        };
+
+        ClientData* clientData;
+
+        HashSet<JSObject*> arrayVisitedElements;
+
+        Heap heap;
+
+    private:
+        JSGlobalData(bool isShared = false);
+
+        static JSGlobalData*& sharedInstanceInternal();
+    };
+
+}
+
+#endif