/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

package netscape.jsdebug;

/**
* This interface provides access to the execution stack of a thread.
* It has several subclasses to distinguish between different kinds of
* stack frames: these currently include activations of Java methods
* or JavaScript functions.
* It is possible that synchronize blocks and try blocks deserve their own
* stack frames - to allow for later extensions a debugger should skip over
* stack frames it doesn't understand.
* Note that this appears very Java-specific.  However, multiple threads and
* exceptions are relevant to JavaScript as well because of its
* interoperation with Java.
*
* @author  John Bandhauer
* @version 1.0
* @since   1.0
*/
public final class JSStackFrameInfo extends StackFrameInfo
{
    public JSStackFrameInfo(JSThreadState threadState) {
        super(threadState);
    }

    protected native StackFrameInfo getCaller0()
        throws InvalidInfoException;

    public native PC getPC()
        throws InvalidInfoException;

    private int     _nativePtr;     // used internally
}