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diff --git a/Source/JavaScriptCore/interpreter/Interpreter.h b/Source/JavaScriptCore/interpreter/Interpreter.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 Interpreter_h
+#define Interpreter_h
+
+#include "ArgList.h"
+#include "FastAllocBase.h"
+#include "JSCell.h"
+#include "JSValue.h"
+#include "JSObject.h"
+#include "Opcode.h"
+#include "RegisterFile.h"
+
+#include <wtf/HashMap.h>
+
+namespace JSC {
+
+    class CodeBlock;
+    class EvalExecutable;
+    class FunctionExecutable;
+    class JSFunction;
+    class JSGlobalObject;
+    class ProgramExecutable;
+    class Register;
+    class ScopeChainNode;
+    class SamplingTool;
+    struct CallFrameClosure;
+    struct HandlerInfo;
+    struct Instruction;
+    
+    enum DebugHookID {
+        WillExecuteProgram,
+        DidExecuteProgram,
+        DidEnterCallFrame,
+        DidReachBreakpoint,
+        WillLeaveCallFrame,
+        WillExecuteStatement
+    };
+
+    enum { MaxLargeThreadReentryDepth = 256, MaxSmallThreadReentryDepth = 32 };
+
+    class Interpreter : public FastAllocBase {
+        friend class JIT;
+        friend class CachedCall;
+    public:
+        Interpreter();
+
+        RegisterFile& registerFile() { return m_registerFile; }
+        
+        Opcode getOpcode(OpcodeID id)
+        {
+            #if ENABLE(COMPUTED_GOTO_INTERPRETER)
+                return m_opcodeTable[id];
+            #else
+                return id;
+            #endif
+        }
+
+        OpcodeID getOpcodeID(Opcode opcode)
+        {
+            #if ENABLE(COMPUTED_GOTO_INTERPRETER)
+                ASSERT(isOpcode(opcode));
+                return m_opcodeIDTable.get(opcode);
+            #else
+                return opcode;
+            #endif
+        }
+
+        bool isOpcode(Opcode);
+
+        JSValue execute(ProgramExecutable*, CallFrame*, ScopeChainNode*, JSObject* thisObj);
+        JSValue executeCall(CallFrame*, JSObject* function, CallType, const CallData&, JSValue thisValue, const ArgList&);
+        JSObject* executeConstruct(CallFrame*, JSObject* function, ConstructType, const ConstructData&, const ArgList&);
+        JSValue execute(EvalExecutable* evalNode, CallFrame* exec, JSObject* thisObj, ScopeChainNode* scopeChain);
+
+        JSValue retrieveArguments(CallFrame*, JSFunction*) const;
+        JSValue retrieveCaller(CallFrame*, JSFunction*) const;
+        void retrieveLastCaller(CallFrame*, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const;
+        
+        void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
+        
+        SamplingTool* sampler() { return m_sampler.get(); }
+
+        NEVER_INLINE JSValue callEval(CallFrame*, RegisterFile*, Register* argv, int argc, int registerOffset);
+        NEVER_INLINE HandlerInfo* throwException(CallFrame*&, JSValue&, unsigned bytecodeOffset);
+        NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine);
+
+        void dumpSampleData(ExecState* exec);
+        void startSampling();
+        void stopSampling();
+    private:
+        enum ExecutionFlag { Normal, InitializeAndReturn };
+
+        CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, JSFunction*, int argCount, ScopeChainNode*);
+        void endRepeatCall(CallFrameClosure&);
+        JSValue execute(CallFrameClosure&);
+
+        JSValue execute(EvalExecutable*, CallFrame*, JSObject* thisObject, int globalRegisterOffset, ScopeChainNode*);
+
+#if ENABLE(INTERPRETER)
+        NEVER_INLINE bool resolve(CallFrame*, Instruction*, JSValue& exceptionValue);
+        NEVER_INLINE bool resolveSkip(CallFrame*, Instruction*, JSValue& exceptionValue);
+        NEVER_INLINE bool resolveGlobal(CallFrame*, Instruction*, JSValue& exceptionValue);
+        NEVER_INLINE bool resolveGlobalDynamic(CallFrame*, Instruction*, JSValue& exceptionValue);
+        NEVER_INLINE void resolveBase(CallFrame*, Instruction* vPC);
+        NEVER_INLINE bool resolveBaseAndProperty(CallFrame*, Instruction*, JSValue& exceptionValue);
+        NEVER_INLINE ScopeChainNode* createExceptionScope(CallFrame*, const Instruction* vPC);
+
+        void tryCacheGetByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const Identifier& propertyName, const PropertySlot&);
+        void uncacheGetByID(CodeBlock*, Instruction* vPC);
+        void tryCachePutByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const PutPropertySlot&);
+        void uncachePutByID(CodeBlock*, Instruction* vPC);        
+#endif // ENABLE(INTERPRETER)
+
+        NEVER_INLINE bool unwindCallFrame(CallFrame*&, JSValue, unsigned& bytecodeOffset, CodeBlock*&);
+
+        static ALWAYS_INLINE CallFrame* slideRegisterWindowForCall(CodeBlock*, RegisterFile*, CallFrame*, size_t registerOffset, int argc);
+
+        static CallFrame* findFunctionCallFrame(CallFrame*, JSFunction*);
+
+        JSValue privateExecute(ExecutionFlag, RegisterFile*, CallFrame*);
+
+        void dumpCallFrame(CallFrame*);
+        void dumpRegisters(CallFrame*);
+        
+        bool isCallBytecode(Opcode opcode) { return opcode == getOpcode(op_call) || opcode == getOpcode(op_construct) || opcode == getOpcode(op_call_eval); }
+
+        void enableSampler();
+        int m_sampleEntryDepth;
+        OwnPtr<SamplingTool> m_sampler;
+
+        int m_reentryDepth;
+
+        RegisterFile m_registerFile;
+        
+#if ENABLE(COMPUTED_GOTO_INTERPRETER)
+        Opcode m_opcodeTable[numOpcodeIDs]; // Maps OpcodeID => Opcode for compiling
+        HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling
+#endif
+    };
+    
+} // namespace JSC
+
+#endif // Interpreter_h