[LAD] memory leak assistance

[hermann]

Am Mittwoch, den 30.12.2009, 04:54 +1100 schrieb Patrick Shirkey:

> 
> Thanks. That's a nicer way of doing things but this call segfaults
> 
> pango_layout_new(style->font_desc)
> 
> gcc tells me this:
> 
> note: expected ‘struct PangoContext *’ but argument is of type ‘struct 
> PangoFontDescription *’
> 
> I have replaced it with this:
> 
> pl = pango_layout_new(gtk_widget_get_pango_context(widget));
> 
Ah, okay, I didn't really use pango_layout_new, were for do you use it ?
You have already set the Font style, why don't simply label it ?
Do you use the rect afterwards ?


> 
> But still get a memory leak. This makes it happen faster than the 
> previous method I was using. Back down to a couple of minutes before I 
> see the leak from 10 previously.
> 
> 
> 
> 
> Patrick Shirkey
> Boost Hardware Ltd
> 
> 
> 
> >
> > Am Mittwoch, den 30.12.2009, 01:18 +1100 schrieb Patrick Shirkey:
> >    
> >> Hi,
> >>
> >> I have some code in gtk2 that is leaking and I can't fix it. Over the
> >> past two nights I have managed to get the leak down from 200MB/minute to
> >> 200MB/10 minutes but I can't get rid of it completely. It's annoying
> >> because it increments in 200MB blocks so I have to wait for up to 10
> >> mins to see if it is fixed or not. I have tried valgrind but it doesn't
> >> really like jack and did not give me any useful output. I have traced
> >> the leak through normal debugging and have verified that it does not
> >> happen if I disable this offending code.
> >>
> >> This code is run in the widgets realize event and the event is triggered
> >> every 500ms.
> >>
> >>
> >>     PangoContext *pc = gtk_widget_get_pango_context(widget);
> >>     PangoLayout *pl;
> >>     PangoFontDescription *pfd;
> >>     PangoRectangle rect;
> >>
> >>     pfd = pango_font_description_new();
> >>     pango_font_description_set_family(pfd, "sans");
> >>     pango_font_description_set_size(pfd, 8 * PANGO_SCALE);
> >>     pango_context_set_font_description(pc, pfd);
> >>     pl = pango_layout_new(pc);
> >>     pango_layout_set_text(pl, "99", -1);
> >>     pango_layout_get_pixel_extents(pl,&rect, NULL);
> >>
> >>     pango_font_description_free(pfd);
> >>     g_object_unref(pc);
> >>
> >>
> >> If I add another
> >>
> >>        g_object_unref(pl) ;
> >>
> >>
> >> The app code will compile but when I run it I get this segfault:
> >>
> >> *** glibc detected *** ./src/jackeq: free(): invalid pointer:
> >> 0x0000000001b87a60 ***
> >>
> >>
> >> I can have one g_object_unref for either pl or pc without segfaulting
> >> but not both.
> >>
> >>
> >> I'm pretty sure this is the last leak I have to catch for the merged
> >> gtkmeter.c/gtkmeterscale.c and I can't release jackeq until it is fixed.
> >> Any assistance with this one is appreciated.
> >>
> >>
> >> Cheers.
> >>
> >>      
> >    
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