FIX: Error on Exit in IE when Using Java Serialization

• Microsoft Internet Explorer for Windows 95
• Microsoft Internet Explorer for Windows NT 4.0
• Microsoft SDK for Java, versions 2.0, 2.01

SYMPTOMS

A complex serialization scheme when used from Internet Explorer causes Internet Explorer to stop when exiting. Internet Explorer stops with a dialog box that reports:

Iexplore.exe - Application Error

The instruction at "0xSomeAddr" referenced memory at "0xOthrAddr". The memory could not be "read".

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in the Virtual Machine for Java distributed with Internet Explorer 4.01 Service Pack 1 and later.

MORE INFORMATION

Steps to Reproduce Behavior

1. Save this Java source to a file named Test2.java:

   
         import java.applet.*;
         import java.awt.*;
         import java.io.*;
   
         // this applet builds a serialized object which has the minimum
         // required complexity to reproduce a bug in IE 4.0x
   
         public class test2 extends Applet
   
         {
            Panel panel = new Panel();
            Button load = new Button("           ");
   
            public void init()
            {
               add(panel);
               panel.setLayout(new FlowLayout());
               panel.add(load);
               try
               {
                  serial();
               }
               catch (Exception x)
               {
                  System.out.println("Exception: " + x.getMessage());
               }
            }
   
            private void serial() throws IOException, ClassNotFoundException
            {
               ByteArrayOutputStream biff = new ByteArrayOutputStream();
               ObjectOutputStream out = new ObjectOutputStream(biff);
               out.writeObject(new level0());
               out.flush();
               out.close();
               byte[] temp = biff.toByteArray();
               ByteArrayInputStream joe = new ByteArrayInputStream(temp);
               ObjectInputStream in = new ObjectInputStream(joe);
               level0 obj = (level0)in.readObject();
               in.close();
               load.setLabel(obj.name);
            }
         }
   
         abstract class base
         implements java.io.Serializable
         {}
   
         class level0 extends base
         implements java.io.Serializable
         {
            level1 x = new level1();
            public String name = "Can exit";
         }
   
         class level1
         implements java.io.Serializable
         {
            level2 x = new level2();
         }
   
         class level2
         implements java.io.Serializable
         {
            level3 x = new level3();
         }
   
         class level3
         implements java.io.Serializable
         {} 




2. Compile the file.



3. Run the class "test2" as an applet in Internet Explorer 4.0x.



4. When you see the button with the label "Can exit," exit Internet Explorer.



5. The dialog box will appear telling you that IExplore.exe has an error.

Additional query words: java serialization

Keywords : IOPkg JVM
Version : WINDOWS:2.0,2.01
Platform : WINDOWS
Issue type : kbbug