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diff --git a/Source/JavaScriptCore/runtime/JSGlobalData.h b/Source/JavaScriptCore/runtime/JSGlobalData.h
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+/*
+ * Copyright (C) 2008, 2009 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 "CachedTranscendentalFunction.h"
+#include "Collector.h"
+#include "DateInstanceCache.h"
+#include "ExecutableAllocator.h"
+#include "JITStubs.h"
+#include "JSValue.h"
+#include "MarkStack.h"
+#include "NumericStrings.h"
+#include "SmallStrings.h"
+#include "Terminator.h"
+#include "TimeoutChecker.h"
+#include "WeakRandom.h"
+#include <wtf/BumpPointerAllocator.h>
+#include <wtf/Forward.h>
+#include <wtf/HashMap.h>
+#include <wtf/RefCounted.h>
+#include <wtf/ThreadSpecific.h>
+#include <wtf/WTFThreadData.h>
+#if ENABLE(REGEXP_TRACING)
+#include <wtf/ListHashSet.h>
+#endif
+
+struct OpaqueJSClass;
+struct OpaqueJSClassContextData;
+
+namespace JSC {
+
+    class CodeBlock;
+    class CommonIdentifiers;
+    class IdentifierTable;
+    class Interpreter;
+    class JSGlobalObject;
+    class JSObject;
+    class Lexer;
+    class Parser;
+    class RegExpCache;
+    class Stringifier;
+    class Structure;
+    class UString;
+#if ENABLE(REGEXP_TRACING)
+    class RegExp;
+#endif
+
+    struct HashTable;
+    struct Instruction;    
+
+    struct DSTOffsetCache {
+        DSTOffsetCache()
+        {
+            reset();
+        }
+        
+        void reset()
+        {
+            offset = 0.0;
+            start = 0.0;
+            end = -1.0;
+            increment = 0.0;
+        }
+
+        double offset;
+        double start;
+        double end;
+        double increment;
+    };
+
+    enum ThreadStackType {
+        ThreadStackTypeLarge,
+        ThreadStackTypeSmall
+    };
+
+    class JSGlobalData : public RefCounted<JSGlobalData> {
+    public:
+        // WebCore has a one-to-one mapping of threads to JSGlobalDatas;
+        // either create() or createLeaked() should only be called once
+        // on a thread, this is the 'default' JSGlobalData (it uses the
+        // thread's default string uniquing table from wtfThreadData).
+        // API contexts created using the new context group aware interface
+        // create APIContextGroup objects which require less locking of JSC
+        // than the old singleton APIShared JSGlobalData created for use by
+        // the original API.
+        enum GlobalDataType { Default, APIContextGroup, APIShared };
+
+        struct ClientData {
+            virtual ~ClientData() = 0;
+        };
+
+        bool isSharedInstance() { return globalDataType == APIShared; }
+        bool usingAPI() { return globalDataType != Default; }
+        static bool sharedInstanceExists();
+        static JSGlobalData& sharedInstance();
+
+        static PassRefPtr<JSGlobalData> create(ThreadStackType);
+        static PassRefPtr<JSGlobalData> createLeaked(ThreadStackType);
+        static PassRefPtr<JSGlobalData> createContextGroup(ThreadStackType);
+        ~JSGlobalData();
+
+#if ENABLE(JSC_MULTIPLE_THREADS)
+        // Will start tracking threads that use the heap, which is resource-heavy.
+        void makeUsableFromMultipleThreads() { heap.makeUsableFromMultipleThreads(); }
+#endif
+
+        GlobalDataType globalDataType;
+        ClientData* clientData;
+
+        const HashTable* arrayTable;
+        const HashTable* dateTable;
+        const HashTable* jsonTable;
+        const HashTable* mathTable;
+        const HashTable* numberTable;
+        const HashTable* regExpTable;
+        const HashTable* regExpConstructorTable;
+        const HashTable* stringTable;
+        
+        RefPtr<Structure> activationStructure;
+        RefPtr<Structure> interruptedExecutionErrorStructure;
+        RefPtr<Structure> terminatedExecutionErrorStructure;
+        RefPtr<Structure> staticScopeStructure;
+        RefPtr<Structure> strictEvalActivationStructure;
+        RefPtr<Structure> stringStructure;
+        RefPtr<Structure> notAnObjectStructure;
+        RefPtr<Structure> propertyNameIteratorStructure;
+        RefPtr<Structure> getterSetterStructure;
+        RefPtr<Structure> apiWrapperStructure;
+        RefPtr<Structure> dummyMarkableCellStructure;
+
+        static void storeVPtrs();
+        static JS_EXPORTDATA void* jsArrayVPtr;
+        static JS_EXPORTDATA void* jsByteArrayVPtr;
+        static JS_EXPORTDATA void* jsStringVPtr;
+        static JS_EXPORTDATA void* jsFunctionVPtr;
+
+        IdentifierTable* identifierTable;
+        CommonIdentifiers* propertyNames;
+        const MarkedArgumentBuffer* 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;
+        NumericStrings numericStrings;
+        DateInstanceCache dateInstanceCache;
+        
+#if ENABLE(ASSEMBLER)
+        ExecutableAllocator executableAllocator;
+        ExecutableAllocator regexAllocator;
+#endif
+
+#if !ENABLE(JIT)
+        bool canUseJIT() { return false; } // interpreter only
+#elif !ENABLE(INTERPRETER)
+        bool canUseJIT() { return true; } // jit only
+#else
+        bool canUseJIT() { return m_canUseJIT; }
+#endif
+
+        const StackBounds& stack()
+        {
+            return (globalDataType == Default)
+                ? m_stack
+                : wtfThreadData().stack();
+        }
+
+        Lexer* lexer;
+        Parser* parser;
+        Interpreter* interpreter;
+#if ENABLE(JIT)
+        OwnPtr<JITThunks> jitStubs;
+        MacroAssemblerCodePtr getCTIStub(ThunkGenerator generator)
+        {
+            return jitStubs->ctiStub(this, generator);
+        }
+        PassRefPtr<NativeExecutable> getHostFunction(NativeFunction function);
+        PassRefPtr<NativeExecutable> getHostFunction(NativeFunction function, ThunkGenerator generator);
+#endif
+        TimeoutChecker timeoutChecker;
+        Terminator terminator;
+        Heap heap;
+
+        JSValue exception;
+#if ENABLE(JIT)
+        ReturnAddressPtr exceptionLocation;
+#endif
+
+        HashMap<OpaqueJSClass*, OpaqueJSClassContextData*> opaqueJSClassData;
+
+        JSGlobalObject* head;
+        JSGlobalObject* dynamicGlobalObject;
+
+        HashSet<JSObject*> arrayVisitedElements;
+
+        Stringifier* firstStringifierToMark;
+
+        MarkStack markStack;
+
+        double cachedUTCOffset;
+        DSTOffsetCache dstOffsetCache;
+        
+        UString cachedDateString;
+        double cachedDateStringValue;
+
+        int maxReentryDepth;
+
+        RegExpCache* m_regExpCache;
+
+        BumpPointerAllocator m_regexAllocator;
+
+#if ENABLE(REGEXP_TRACING)
+        typedef ListHashSet<RefPtr<RegExp> > RTTraceList;
+        RTTraceList* m_rtTraceList;
+#endif
+
+#ifndef NDEBUG
+        ThreadIdentifier exclusiveThread;
+#endif
+
+        CachedTranscendentalFunction<sin> cachedSin;
+
+        void resetDateCache();
+
+        void startSampling();
+        void stopSampling();
+        void dumpSampleData(ExecState* exec);
+        void recompileAllJSFunctions();
+        RegExpCache* regExpCache() { return m_regExpCache; }
+#if ENABLE(REGEXP_TRACING)
+        void addRegExpToTrace(PassRefPtr<RegExp> regExp);
+#endif
+        void dumpRegExpTrace();
+    private:
+        JSGlobalData(GlobalDataType, ThreadStackType);
+        static JSGlobalData*& sharedInstanceInternal();
+        void createNativeThunk();
+#if ENABLE(JIT) && ENABLE(INTERPRETER)
+        bool m_canUseJIT;
+#endif
+        StackBounds m_stack;
+    };
+
+} // namespace JSC
+
+#endif // JSGlobalData_h