Name: gm110360 Date: 04/25/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

Java(TM) Plug-in: Version 1.4.0

FULL OPERATING SYSTEM VERSION :
Windows NT Version 4.0

A DESCRIPTION OF THE PROBLEM :
Internet explorer crashes when the applet does a javascript
callback, passing a Hashtable as a parameter.

  From Javascript, the following code works fine :
var customData = test.arguments[0];
var val = customData.get("key1");

if you try accessing the hashtable's enumeration interface
methods, like the following :
var en = customData.elements();
The browser crashes.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Open the HTML page instanciating the applet
2. The applet loads
3. The browser crashes as soon as the first callback occurs

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected : The javascript callbacks to be execute without
crashing

Actual : The Browser crashes before the callback function
finishes.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : unknown exception code occurred at PC=0x77F1D479
Function=RaiseException+0x6A
Library=C:\WINNT\system32\KERNEL32.dll

Current Java thread:
at sun.beans.ole.OleDispatchInterface.nativeStoreParm(Native Method)
at sun.beans.ole.JavaObjectInterface.storeParm(Unknown Source)
at sun.beans.ole.JavaObjectInterface.invoke(Unknown Source)

Dynamic libraries:
0x00400000 - 0x00412000 C:\PROGRA~1\Plus!\MICROS~1\iexplore.exe
0x77F60000 - 0x77FBE000 C:\WINNT\System32\ntdll.dll
0x77F00000 - 0x77F5E000 C:\WINNT\system32\KERNEL32.dll
0x77E70000 - 0x77EC5000 C:\WINNT\system32\USER32.dll
0x77ED0000 - 0x77EFC000 C:\WINNT\system32\GDI32.dll
0x77DC0000 - 0x77DFF000 C:\WINNT\system32\ADVAPI32.dll
0x77E10000 - 0x77E67000 C:\WINNT\system32\RPCRT4.dll
0x70BD0000 - 0x70C1C000 C:\WINNT\system32\SHLWAPI.dll
0x10000000 - 0x1000D000 C:\WINNT\EQNHOOK.DLL
0x00760000 - 0x00767000 C:\WINNT\System32\VDDFIFO.dll
0x779D0000 - 0x779E5000 C:\WINNT\System32\MSVCRT40.dll
0x78000000 - 0x78043000 C:\WINNT\system32\MSVCRT.dll
0x780A0000 - 0x780B2000 C:\WINNT\System32\MSVCIRT.dll
0x70FE0000 - 0x710FB000 C:\WINNT\System32\shdocvw.dll
0x71700000 - 0x7178A000 C:\WINNT\system32\COMCTL32.dll
0x77C40000 - 0x77D7C000 C:\WINNT\system32\SHELL32.dll
0x718A0000 - 0x71902000 C:\WINNT\System32\shdoclc.dll
0x00910000 - 0x00919000 C:\WINNT\System32\PGPhk.dll
0x77B20000 - 0x77BD7000 C:\WINNT\System32\ole32.dll
0x71110000 - 0x711D9000 C:\WINNT\System32\BROWSEUI.dll
0x71920000 - 0x7192B000 C:\WINNT\System32\browselc.dll
0x779B0000 - 0x779B9000 C:\WINNT\System32\LinkInfo.dll
0x77720000 - 0x77731000 C:\WINNT\system32\MPR.dll
0x77A40000 - 0x77A4D000 C:\WINNT\System32\ntshrui.dll
0x77800000 - 0x7783A000 C:\WINNT\system32\NETAPI32.dll
0x77840000 - 0x77849000 C:\WINNT\system32\NETRAP.dll
0x777E0000 - 0x777ED000 C:\WINNT\system32\SAMLIB.dll
0x00C00000 - 0x00C08000 C:\Program Files\Adobe\Acrobat 5.0
\Reader\ActiveX\AcroIEHelper.ocx
0x65340000 - 0x653DB000 C:\WINNT\system32\OLEAUT32.dll
0x71290000 - 0x71296000 C:\WINNT\system32\MSIDLE.DLL
0x70290000 - 0x70303000 C:\WINNT\System32\urlmon.dll
0x77A90000 - 0x77A9B000 C:\WINNT\system32\VERSION.dll
0x779C0000 - 0x779C8000 C:\WINNT\system32\LZ32.dll
0x77BF0000 - 0x77BF7000 C:\WINNT\System32\rpcltc1.dll
0x70440000 - 0x704CF000 C:\WINNT\System32\mlang.dll
0x70C30000 - 0x70ED1000 C:\WINNT\System32\mshtml.dll
0x4A000000 - 0x4A02C000 C:\WINNT\System32\PDM.DLL
0x4AA00000 - 0x4AA15000 C:\WINNT\System32\MSDBG.DLL
0x70200000 - 0x70277000 C:\WINNT\System32\WININET.DLL
0x74A10000 - 0x74A2F000 C:\WINNT\system32\TAPI32.dll
0x76AB0000 - 0x76AB5000 C:\WINNT\System32\IMM32.DLL
0x712B0000 - 0x71337000 C:\WINNT\System32\jscript.dll
0x01820000 - 0x01835000 C:\Program Files\Java\j2re1.4.0\bin\npjpi140.dll
0x01840000 - 0x0185C000 C:\Program Files\Java\j2re1.4.0\bin\beans.ocx
0x776D0000 - 0x776D8000 C:\WINNT\System32\wsock32.dll
0x776B0000 - 0x776C4000 C:\WINNT\system32\WS2_32.dll
0x776A0000 - 0x776A7000 C:\WINNT\system32\WS2HELP.dll
0x74FF0000 - 0x74FFE000 C:\WINNT\System32\rnr20.dll
0x01860000 - 0x01875000 C:\Program Files\Java\j2re1.4.0\bin\jpishare.dll
0x6D330000 - 0x6D442000 C:\PROGRA~1\Java\J2RE14~1.0\bin\client\jvm.dll
0x77FD0000 - 0x77FFA000 C:\WINNT\System32\WINMM.dll
0x6BD00000 - 0x6BD21000 C:\WINNT\System32\cwbaudll.dll
0x6D1D0000 - 0x6D1D7000 C:\PROGRA~1\Java\J2RE14~1.0\bin\hpi.dll
0x6D300000 - 0x6D30D000 C:\PROGRA~1\Java\J2RE14~1.0\bin\verify.dll
0x6D210000 - 0x6D228000 C:\PROGRA~1\Java\J2RE14~1.0\bin\java.dll
0x6D320000 - 0x6D32D000 C:\PROGRA~1\Java\J2RE14~1.0\bin\zip.dll
0x0DC80000 - 0x0DC8D000 C:\Program Files\Java\j2re1.4.0\bin\zip.dll
0x6D000000 - 0x6D0F6000 C:\Program Files\Java\j2re1.4.0\bin\awt.dll
0x77C00000 - 0x77C18000 C:\WINNT\System32\WINSPOOL.DRV
0x6D180000 - 0x6D1D0000 C:\Program Files\Java\j2re1.4.0
\bin\fontmanager.dll
0x77130000 - 0x77156000 C:\WINNT\System32\ddraw.dll
0x6D2D0000 - 0x6D2DD000 C:\Program Files\Java\j2re1.4.0\bin\net.dll
0x71A20000 - 0x71A28000 C:\WINNT\System32\shfolder.dll
0x77660000 - 0x7766F000 C:\WINNT\system32\msafd.dll
0x77690000 - 0x77699000 C:\WINNT\System32\wshtcpip.dll
0x48080000 - 0x480A8000 C:\WINNT\System32\MSLS31.DLL
0x0EB10000 - 0x0EB1A000 C:\Program Files\Java\j2re1.4.0\bin\packager.dll
0x76AC0000 - 0x76ADD000 C:\WINNT\System32\imagehlp.dll
0x6D130000 - 0x6D152000 C:\Program Files\Java\j2re1.4.0\bin\dcpr.dll
0x71DC0000 - 0x71DCA000 C:\WINNT\System32\PSAPI.DLL

Local Time = Thu Apr 18 15:57:50 2002
Elapsed Time = 4
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.0-b92 mixed mode)
#

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.applet.Applet;
import java.util.Hashtable;
import java.util.Date;
import netscape.javascript.JSObject ;

/**
 *
 * <p>Title: Browser Overload applet</p>
 * <p>Description: </p>
 * This applet calls back a Javascript function, passing it a hashtable
 * Parameters can be used to set :
 * the interval between 2 callbacks
 * the number of callbacks to execute
 * the name of the javascript function to be called
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */
public class browseroverloadapplet extends Applet {

  final static String PARAM_INTERVAL = "interval";
  final static String PARAM_TRIES = "tries";
  final static String PARAM_CALLBACK = "callback";
  final static String PARAM_SUMMARY = "summary";
  final static String PARAM_MODE = "mode";

  int javaCallCount = 0;
  Date sd, ed;

  public void init()
  {

  }

  public void start()
  {
try
{
JSObject window = JSObject.getWindow(this);
final String key = "key";
final String push = "push";

int interval = Integer.parseInt(getParameter(PARAM_INTERVAL));
int tries = Integer.parseInt(getParameter(PARAM_TRIES));
String mode = getParameter(PARAM_MODE);

if (!push.equals(mode))
{
return;
}


//Compute the elapsed time
sd = new Date();

for (int i=0; i<tries; i++)
{
Hashtable h = new Hashtable();
h.put("key1", "firstvalue_" + i);
h.put("key2", "secondvalue_" + i);
Object [] param = new Object[] {h};
window.call(getParameter(PARAM_CALLBACK), param);
//Call the Javascript function
if (interval==-1)
Thread.yield();
if (interval > 0)
Thread.sleep((long)interval);
}
ed = new Date();

//Call the Javascript Summary function
window.call(getParameter(PARAM_SUMMARY), new Object [] {"" +
(ed.getTime() - sd.getTime())});

}
catch(Exception e)
{
e.printStackTrace();
}

  }

  public int javaCall()
  {
System.out.println(javaCallCount);
return javaCallCount++;
  }

  public void startTiming()
  {
System.out.println("Starting Timer");
sd = new Date();
  }

  public long endTiming()
  {
ed = new Date();
System.out.println("Ending Timer - Time Elapsed : " + (ed.getTime() -
sd.getTime()));
return ed.getTime() - sd.getTime();
  }

}




/*-------------------------------------------------------------------------
HTML Page Sample

<html>
<head>
<title>Browser Overload Applet</title>
<SCRIPT language="Javascript1.2">
var callscount=0;

function test()
{
var customData = test.arguments[0];
var en = customData.elements();
        //Does not crash with the code below
var val = customData.get("key1");//en.nextElement();
var customValue = customData.get("key2");//en.nextElement();
}

function summary()
{
var elapsed = summary.arguments[0];
}
</SCRIPT>
</head>
<body>
<APPLET name="BrowserOverload"
code="browseroverloadapplet.browseroverloadapplet.class"
archive="browseroverload.jar" height="0" width="0" scriptable="true"
mayscript="true">
<param name="interval" value="5"/>
<param name="tries" value="1000"/>
<param name="callback" value="test"/>
<param name="summary" value="summary"/>
<param name="mode" value="push"/>
</APPLET>
</body>
</html>


-------------------------------------------------------------------------*/






---------- END SOURCE ----------
(Review ID: 145597)
======================================================================