Re: gdk events stuff debugging

[Manu TM <manutm007 gmail com>]

Thanks for the links. I'm gonna try parasite and will compile gtk from
source with debugging enabled.

What made me think that maybe there was a mess with events is that I have
one dialog in the app to setup preferences. This dialog have a lot of entries
and extra buttons. And I have another dialog with one entry, a tree view to
select urls and extra buttons as well. Then I have to catch double-clicks on
the tree view and do several things when clicking on buttons. So I had to write
event handlers to achieve this. I also need to catch <esc_key> pressed. And the
app only crashes when I'm in these dialogs. So, do I need to mess with events or
not? I really don't know yet.

Anyways, I hope debugging with a recompiled version of gtk will make things
clearer...


Emmanuel Thomas-Maurin


Boggess Rod wrote:
> Let me say this right up front, debugging threaded applications is
> tricky in any platform using any tool. That said, anything and
> everything is a suspect until it's not.
>
> The gtk_widget_set_events() function allows you to specify a mask to
> filter events received by a widget. Unless you're writing something that
> requires you to turn off events to in-built widgets or creating your own
> widgets, you probably don't want to mess with that.  If you're not doing
> either of the aforementioned activities, it shouldn't be a source of the
> problem.
>
> My use of GTK is very limited; HPUX and Windows. I see that there's a
> new tool out called Parasite (MIT public license) from VMWare
> specifically for debugging GTK. 
>
> Someone else on this list would have more experience with GDB and any
> tools to assist with GTK, but here are two helpful links you might check
> out for some guidance. If you like, you can google the list's archives
> (http://www.google.com/custom?hq=inurl:/archives/gtk-list/&hl=en&domains
> =mail.gnome.org&q=debugger&btnG=Search&sitesearch=mail.gnome.org) -- I
> know debugging using gdb has been discussed on here before.
>
> http://www.gtk.org/api/2.6/gtk/gtk-running.html
> http://code.google.com/p/chromium/wiki/LinuxDebuggingGtk
>
>
> -----Original Message-----
> From: Manu TM [mailto:manutm007 gmail com] 
> Sent: Wednesday, January 27, 2010 4:11 PM
> To: Boggess Rod
> Cc: GTK mailing list
> Subject: Re: gdk events stuff debugging
>
> I'm using gcc (v4.4.1) on ubuntu (linux kernel 2.6.31-18.)
>
> By the way, I was just reading the gtk doc on events when I found
> something saying that it was a common mistake to forget to use
> gtk_widget_set_events(). well, I've actually never used this function.
> Could this be the reason of the mess?
>
>
> Emmanuel Thomas-Maurin
>
>
> Boggess Rod wrote:
>   
> > I don't know the answer, but I do know that, since gtk is a
> > cross-platform library, the answer will require knowing what platform,
> > and probably what compiler you're using. You might want to repost with
> > that information.
> >
> > -----Original Message-----
> > From: gtk-app-devel-list-bounces gnome org
> > [mailto:gtk-app-devel-list-bounces gnome org] On Behalf Of Manu TM
> > Sent: Wednesday, January 27, 2010 1:29 PM
> > To: GTK mailing list
> > Subject: gdk events stuff debugging
> >
> > Hi,
> >
> > This may be a not specific enough question but what's the best way to
> > debug a gtk app? I've been debugging one without much success for
> >     
> about
>   
> > 2 weeks now and I think there are problems related to callbacks and
> >     
> gdk
>   
> > events handlers because I always get segfaults from
> > gkd_events_dispatch().
> > And I've been checking my code again and again. This is becoming a big
> > problem now because I really need to have my app working fine very
> >     
> soon.
>   
> > So far, gdb and valgrind haven't be usefull enough so I guess I will
> > have
> > to go to the "printf" debugging stuff. But I don't how to check all
> >     
> this
>   
> > gdk
> > events stuff. Any idea?
> >
> > Any hints will be highly appreciated and I'm ready to try out anything
> > possible.
> > Many thanks in advance.
> >
> >   
> >