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diff --git a/Source/JavaScriptCore/runtime/ExceptionHelpers.cpp b/Source/JavaScriptCore/runtime/ExceptionHelpers.cpp
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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.
+ */
+
+#include "config.h"
+#include "ExceptionHelpers.h"
+
+#include "CodeBlock.h"
+#include "CallFrame.h"
+#include "ErrorInstance.h"
+#include "JSGlobalObjectFunctions.h"
+#include "JSObject.h"
+#include "JSNotAnObject.h"
+#include "Interpreter.h"
+#include "Nodes.h"
+#include "UStringConcatenate.h"
+
+namespace JSC {
+
+class InterruptedExecutionError : public JSObject {
+public:
+    InterruptedExecutionError(JSGlobalData* globalData)
+        : JSObject(globalData->interruptedExecutionErrorStructure)
+    {
+    }
+
+    virtual ComplType exceptionType() const { return Interrupted; }
+
+    virtual UString toString(ExecState*) const { return "JavaScript execution exceeded timeout."; }
+};
+
+JSObject* createInterruptedExecutionException(JSGlobalData* globalData)
+{
+    return new (globalData) InterruptedExecutionError(globalData);
+}
+
+class TerminatedExecutionError : public JSObject {
+public:
+    TerminatedExecutionError(JSGlobalData* globalData)
+        : JSObject(globalData->terminatedExecutionErrorStructure)
+    {
+    }
+
+    virtual ComplType exceptionType() const { return Terminated; }
+
+    virtual UString toString(ExecState*) const { return "JavaScript execution terminated."; }
+};
+
+JSObject* createTerminatedExecutionException(JSGlobalData* globalData)
+{
+    return new (globalData) TerminatedExecutionError(globalData);
+}
+
+JSObject* createStackOverflowError(ExecState* exec)
+{
+    return createRangeError(exec, "Maximum call stack size exceeded.");
+}
+
+JSObject* createStackOverflowError(JSGlobalObject* globalObject)
+{
+    return createRangeError(globalObject, "Maximum call stack size exceeded.");
+}
+
+JSObject* createUndefinedVariableError(ExecState* exec, const Identifier& ident)
+{
+    UString message(makeUString("Can't find variable: ", ident.ustring()));
+    return createReferenceError(exec, message);
+}
+    
+JSObject* createInvalidParamError(ExecState* exec, const char* op, JSValue value)
+{
+    UString errorMessage = makeUString("'", value.toString(exec), "' is not a valid argument for '", op, "'");
+    JSObject* exception = createTypeError(exec, errorMessage);
+    ASSERT(exception->isErrorInstance());
+    static_cast<ErrorInstance*>(exception)->setAppendSourceToMessage();
+    return exception;
+}
+
+JSObject* createNotAConstructorError(ExecState* exec, JSValue value)
+{
+    UString errorMessage = makeUString("'", value.toString(exec), "' is not a constructor");
+    JSObject* exception = createTypeError(exec, errorMessage);
+    ASSERT(exception->isErrorInstance());
+    static_cast<ErrorInstance*>(exception)->setAppendSourceToMessage();
+    return exception;
+}
+
+JSObject* createNotAFunctionError(ExecState* exec, JSValue value)
+{
+    UString errorMessage = makeUString("'", value.toString(exec), "' is not a function");
+    JSObject* exception = createTypeError(exec, errorMessage);
+    ASSERT(exception->isErrorInstance());
+    static_cast<ErrorInstance*>(exception)->setAppendSourceToMessage();
+    return exception;
+}
+
+JSObject* createNotAnObjectError(ExecState* exec, JSValue value)
+{
+    UString errorMessage = makeUString("'", value.toString(exec), "' is not an object");
+    JSObject* exception = createTypeError(exec, errorMessage);
+    ASSERT(exception->isErrorInstance());
+    static_cast<ErrorInstance*>(exception)->setAppendSourceToMessage();
+    return exception;
+}
+
+JSObject* createErrorForInvalidGlobalAssignment(ExecState* exec, const UString& propertyName)
+{
+    return createReferenceError(exec, makeUString("Strict mode forbids implicit creation of global property '", propertyName, "'"));
+}    
+
+JSObject* throwOutOfMemoryError(ExecState* exec)
+{
+    return throwError(exec, createError(exec, "Out of memory"));
+}
+
+JSObject* throwStackOverflowError(ExecState* exec)
+{
+    return throwError(exec, createStackOverflowError(exec));
+}
+
+} // namespace JSC