[webkit-help] [webkit-dev] NPAPI plugin crashes while calling npnfuncs->invoke in GtkLauncher

souvik.datta at wipro.com souvik.datta at wipro.com
Thu Mar 15 10:27:26 PDT 2012

Yes I am aware of that. That is why I am using npnfuncs->pluginthreadasynccall(). Kindly note  that this same plugin working fine on Firefox.
Can you please tell me whether one should do anything specific for developing a NPAPI plugin for Webkit? 

My understanding is that the plugin that I developed for Firefox should also just work for Webkit (GtkLauncher ). For Webkit,  I have only replaced the header files that I had for Firefox with the ones available in path: WebCore/plugins/

-rw-r--r-- 1 souvik souvik 29209 2012-03-15 19:36 npapi.h
-rw-r--r-- 1 souvik souvik 11899 2011-09-27 02:25 npfunctions.h
-rw-r--r-- 1 souvik souvik 16392 2011-09-27 02:25 npruntime.h
-rw-r--r-- 1 souvik souvik  3846 2011-09-27 02:25 nptypes.h

From: Sergio Villar Senin [svillar at igalia.com]
Sent: Thursday, March 15, 2012 10:14 PM
To: Souvik Datta (WT01 - PES-Auto-Practice)
Subject: Re: [webkit-dev] NPAPI plugin crashes while calling npnfuncs->invoke in GtkLauncher

En 15/03/12 17:32, souvik.datta at wipro.com escribiu:
> Actually that argument is not used and is purposefully sent as NULL. Please find the source code:
> Please find the source code:
> The following function is handler passed to : npnfuncs->pluginthreadasynccall(savedinstance,threadImplementation,NULL); <==== This NULL is  *msg

Just a question, are you using threads in your NPAPI plugin? Because the
NPAPI is not thread-safe, so you cannot call back the browser in a
different thread than the one used by the browser to communicate with
your plugin.


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