gecko-dev/js/jsd/classes/netscape/jsdebug/InstructionHook.java

60 строки
1.6 KiB
Java

/* -*- 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;
/**
* InstructionHook must be subclassed to respond to hooks
* at a particular program instruction.
*
* @author John Bandhauer
* @author Nick Thompson
* @version 1.0
* @since 1.0
*/
public class InstructionHook extends Hook {
private PC pc;
/**
* Create an InstructionHook at the given PC value.
*/
public InstructionHook(PC pc) {
this.pc = pc;
}
/**
* Get the instruction that the hook is set at.
*/
public PC getPC() {
return pc;
}
/**
* Override this method to respond just before a thread
* reaches a particular instruction.
*/
/* jband - 03/31/97 - I made this public to allow chaining */
public void aboutToExecute(ThreadStateBase debug) {
// defaults to no action
}
}