JavaScriptCore/runtime/ExceptionHelpers.cpp

/*
 * 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;
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 */

#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."; }
};

JSValue 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."; }
};

JSValue 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.");
}

JSValue 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;
}

JSValue 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;
}

JSNotAnObjectErrorStub* createNotAnObjectErrorStub(ExecState* exec, bool isNull)
{
    return new (exec) JSNotAnObjectErrorStub(exec, isNull);
}

JSObject* createNotAnObjectError(ExecState* exec, JSNotAnObjectErrorStub* error, unsigned bytecodeOffset, CodeBlock* codeBlock)
{
    // Both op_create_this and op_instanceof require a use of op_get_by_id to get
    // the prototype property from an object. The exception messages for exceptions
    // thrown by these instances op_get_by_id need to reflect this.
    OpcodeID followingOpcodeID;
    if (codeBlock->getByIdExceptionInfoForBytecodeOffset(exec, bytecodeOffset, followingOpcodeID)) {
        ASSERT(followingOpcodeID == op_create_this || followingOpcodeID == op_instanceof);
        if (followingOpcodeID == op_create_this)
            return createNotAConstructorError(exec, error->isNull() ? jsNull() : jsUndefined());
        return createInvalidParamError(exec, "instanceof", error->isNull() ? jsNull() : jsUndefined());
    }

    JSValue value = error->isNull() ? jsNull() : jsUndefined();
    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