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From: Ernst de Haan <znerd@freebsd.org>
To: huang wen hui <huanghwh@yahoo.com>, freebsd-java@freebsd.org
Subject: Re: GC is not work in jdk1.3.1p5+OpenJIT1.1.16
Date: Mon, 26 Nov 2001 10:09:49 +0100
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Hi,

I think submitting a PR with a CC to both java@freebsd.org and the maintainer 
of the corresponding port is the right thing to do.

Ernst

On Sunday 25 November 2001 07:10, huang wen hui wrote:
> hi,
>  Here is the sample code:
> -----------------------------------------
> import java.util.LinkedList;
> import java.util.List;
> import javax.swing.event.EventListenerList;
>
> public class FixQueue extends Object{
>   protected EventListenerList listenerList = new
> EventListenerList();
>
>   private FixQueueException fixQueueExcep
>           = new FixQueueException("Queue's
> MaxQueueLength is Exceed");
>   private LinkedList list;
>   private int maxQueueSize;
>   protected String queueID ="";
>
>   public FixQueue(int newMaxQueueSize, String queueID)
> {
>     maxQueueSize = newMaxQueueSize;
>     this.queueID = queueID;
>     list = new LinkedList ();
>   }
>
>   public synchronized int getListenerCount() {
>     return listenerList.getListenerCount();
>   }
>
>
>   public void addBack(Object obj) {
>     list.addLast (obj);
>     if ( list.size () > maxQueueSize ){
>       list.removeFirst ();
>     }
>   }
>
>   protected void addBackNoNotify(Object obj){
>     list.addLast (obj);
>     if ( list.size () > maxQueueSize ){
>       list.removeFirst ();
>     }
>   }
>
>   public Object getFront() {
>     return list.getFirst ();
>   }
>
>   public Object getBack() {
>     return list.getLast ();
>   }
>
>   public boolean isEmpty() {
>     return list.isEmpty ();
>   }
>
>   public void popFront() {
>     list.removeFirst ();
>   }
>
>   public Object at(int index) {
>     return list.get (index);
>   }
>
>   public int getSize(){
>     return list.size();
>   }
>
>   public int getMaxQueueSize(){
>     return maxQueueSize;
>   }
>
>   public String getQueueID(){
>     return queueID;
>   }
>
>
>   public static void main( String[] argv ){
>     FixQueue fixQueue = new FixQueue(4096,"ID");
>     while(true) {
>     	fixQueue.addBack(new byte[4096]);
>     }
>   }
>
> }
>
> class FixQueueException extends Exception {
>
>   public FixQueueException() {
>     super();
>   }
>
>   public FixQueueException(String s) {
>     super(s);
>   }
> }
> -----------------------------------------
> when run under jdk1.3.1p5 that enable OpenJIT1.1.16,
> the program will eat a lot of memory as posible as it
> can. and error msg is :
> Exception in thread "main"
> java.lang.StackOverflowError
>         at
> java.util.LinkedList.addBefore(LinkedList.java,
> Compiled Code)
>         at
> java.util.LinkedList.addLast(LinkedList.java, Compiled
> Code)
>         at FixQueue.addBack(FixQueue.java, Compiled
> Code)
>         at FixQueue.main(FixQueue.java, Compiled Code)
>
>
> If disable OpenJIT, it worked as expected.
>
> --hwh
>
>
>
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-- 
Ernst de Haan
EuroNet Internet B.V.

    "Come to me all who are weary and burdened
        and I will give you rest" -- Jesus Christ

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