[Xastir-dev] Segfault on list close

[Jason Godfrey]

I looked at it a bit tonight. I wasn't able to figure out what is going on.
I did find that when I set the environment variable MallocScribble I can't
reproduce the problem. It makes me wonder if the station list is just the
canary, as opposed to the source of the problem.

I am going to see if I can get valgrind to work and see if that sheds any
light on the situation. I haven't used valgrind before but have heard good
things. Should be interesting.

- Jason


On Wed, Jul 28, 2010 at 3:14 AM, John Ronan <jpronans at gmail.com> wrote:

>
> On 28 Jul 2010, at 07:55, Curt, WE7U wrote:
>
> > On Thu, 22 Jul 2010, Robert Mead wrote:
> >
> >> Using the latest CVS of Xastir, I get a segfault on closing any of
> >> the station list dialog boxes. I'm running Mac OS X 10.6.4 on a
> >> multiprocessor machine, which I mention since it seems to be
> >> related to threading. While doing a GDB step-through of
> >> list_gui.c:station_list_destroy_shell, it does not crash.
> >>
> >> I can't find the offending line, since I think I'm segfaulting
> >> somewhere in the Xt code after something's been mistakenly free'd
> >> and my gdb-fu is not strong.
> >
> > Any Mac people seeing the same, or can help him debug this?
> I can confirm it's happening with me as well (10.6.4).  I don't normally go
> in there, so I hadn't spotted it up to now.
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x000000000000002b
> 0x0000000100dc643f in SortChildren ()
> (gdb) bt
> #0  0x0000000100dc643f in SortChildren ()
> #1  0x0000000100fdbb8b in XtPhase2Destroy ()
> #2  0x0000000100fdbd62 in _XtDoPhase2Destroy ()
> #3  0x0000000100fdf46f in XtDispatchEvent ()
> #4  0x0000000100fdf571 in XtAppMainLoop ()
> #5  0x00000001000bdf77 in main (argc=1, argv=0x7fff5fbff8f8, envp=<value
> temporarily unavailable, due to optimizations>) at
> ../../xastir/src/main.c:27950
> (gdb)
>
>
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