Re: [gtk-list] Re: GTK_ENTRY cast segfaults, I think

[Jeroen Benckhuijsen <jeroen benck demon nl>]

Ron Martin wrote:
> 
> > Segfault means your accessing memory you're not permitted to access.
> > Your problem is probably that the pointer stored in entry_temp is not
> > the pointer you want (the pointer to the entry-data). It will probably
> > just contain nonsense. Solution: check you're code where the pointer is
> > assigned, write it down, and compare it with the pointer you retrieve.
> > If they differ, you did something wrong, what is hard to say without the
> > code...
> 
> This was an excellent idea.  The pointers definatly do NOT reference the
> same address space.  I have decided to take a different approach,
> however.  Instead of storing the entry widgets in a list, I will just
> attach each entry widget individually, allowing me to reference them in
> the callback funtion rather than having to travers the linked list.  It
> would be easier for me to implement (easier == cleaner code IMHO).
> 
> > Also i think this code is very weird. You alloc memory for a
> > info_database and store
> > it in an other type of structure....
> >
> >         input_info = (struct conn_info *)malloc(sizeof(info_database));
> >         bzero(input_info, sizeof(info_database));
> >
> > Also you may want to add a check wheter the allocation was succesful
> > (input_info != NULL) or you'll get a segfault when the allocation fails.
> > Using g_malloc() solves this problem, but it exists you're app when it
> > fails, depends on you're choices..
> >
> 
> Fine points.  I honestly didn't realize I had that in there.  It was
> there when I first thought about the callback funtion, and somehow
> missed my deleting frenzy I had.  Ah well.
> > Jeroen
> >
> > --
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> 
> Thanks again for replying so quickly!
> 
> Ron Martin
> rmartin@cps.cmich.edu
> 
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Maybe an other piece of advise: I don't know which debugger you're using
currently, but i can recommend ddd (Data Display Debugger). It has a
nice way to show the values of variabeles, structures, etc

Jeroen