IcedTea6-plugin PluginAppletSecurityContext NullPointers

[Deepak Bhole]

* Xerxes Rånby <xerxes at zafena.se> [2009-02-12 05:37]:
> Xerxes Rånby wrote:
>> Hello oliver!
>>
>> Oliver May wrote:
>>> Hi all!
>>>
>>> I am having some difficulties with icedtea-6-plugin on debian (armel). I 
>>> am working on a java applet for communication between a browser 
>>> (iceweasel) and hardware (gpsd) on the neo freerunner phone.
>>>
>> Do you have a url to this applet and its sourcecode? without it it is 
>> really hard to see whats going on.
>> It would be great if you happen to have a small testcase based on code 
>> from the applet that exposes this bug so that it can be fixed properly on  
>> ARM armel platforms.
>>> The problem lies mainly in the communication between the browser and the 
>>> applet, I am calling java methods from javascript code. Whenever I try to 
>>> call a method on a java object I get following errors:
>>>
>>> java.lang.NullPointerException:
>>>     at 
>>> sun.applet.PluginAppletSecurityContext.checkPermission(PluginAppletSecurityContext.java:1002)
>>>     at 
>>> sun.applet.PluginAppletSecurityContext.handleMessage(PluginAppletSecurityContext.java:658)
>
> Deepak where do the PluginDebug.debug post its debug messages? It might 
> shine some light on what calling method is used on what object in 
> checkPermission above.
>
> *snip from PluginAppletSecurityContext.java:658*
>              PluginDebug.debug("Calling method " + m + " on object " + o
>                                                + " with " + arguments);
>
>                                AccessControlContext acc = callContext != 
> null ? callContext : getClosedAccessControlContext();
>                                checkPermission(src, o.getClass(), acc);
> *snap*
>
>
>>>     at 
>>> sun.applet.AppletSecurityContextManager.handleMessage(AppletSecurityContextManager.java:31)
>>>     at 
>>> sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:248)
>>>     at 
>>> sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:34)
>>>
>>> Occasionally I also get following error:
>>> IcedTeaPlugin.cc:4735: Error: parse int
>>>
>
> In IcedTeaPlugin.cc:4735  a lookup to a object seems to have failed in your 
> case. We need to know what string was used here for the lookup.
> I dont want to guess but the errors you have experienced might be related.
>
> *snip from PluginAppletSecurityContext.java:4735*
>  case jobject_type:
>      // Have we referred to this object before?
>      id = str.ToInteger (&conversionResult);
>      PLUGIN_CHECK ("parse int", conversionResult);
>      retval.l = factory->references.ReferenceObject (id);
>      break;
> *snap*
>
>

Hi!

What website do you see this error on?

As for PluginDebug.debug() ... its messages go to STDERR. However,
debug() prints only if you have set ICEDTEAPLUGIN_DEBUG=true, and in
that case, all OUT/ERR is redirected to /tmp/java.stdout and
/tmp/java.stderr

Cheers,
Deepak


> Cheers and have a great day!
> Xerxes