GDB unable to trace xchat on linux

GDB unable to trace xchat on linux

[mancha1]

Hello.

I am using GDB 7.5.1 and trying to trace xchat 2.8.8 compiled with
-ggdb and default configure options (see below).

To reproduce:

$ gdb /path/to/xchat
(gdb) r

xchat starts but hangs at "Looking up <insert server used here>".

xchat's faq (http://xchat.org/gdb/) suggests GDB has trouble debugging 
when a server hostname is used. As they suggest, I ran a local ircd and 
used 127.0.0.1. The problem remains.

Any linux GDB gurus out there that can offer some guidance on what the
problem is?

--mancha

PS. When in this hung state, ^C followed by "thread apply all bt" gives
the following stack. Also after SIGINT and quit from GDB in this state,
xchat's window stays open and the process is unkillable. ps x shows it
in state "t".

#0  0xb7fde424 in __kernel_vsyscall ()
#1  0xb7eed8bb in poll () from /lib/libc.so.6
#2  0xb6e481e6 in g_poll () from /usr/lib/libglib-2.0.so.0
#3  0xb6e3a3ad in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#4  0xb6e3aaef in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#5  0xb7b29fcb in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#6  0x08060da2 in fe_main () at fe-gtk.c:290
#7  0x080b4904 in main (argc=1, argv=0xbfffef14) at xchat.c:920

PPS. Default configuration on this system:

xchat 2.8.8

Building GTK+ Interface .... : yes
Building TEXT Interface .... : no

PLUGINS: Perl: yes Python: yes TCL: yes

mmx tinting ......... : yes     spelling .............. : libsexy
XShm tinting ........ : no      plugin interface ...... : yes
text backend ........ : pango   nls/gettext ........... : yes
openssl support ..... : yes     ipv6 support .......... : no
dbus support ........ : yes     msproxy ntlm (ISA) .... : no

Re: GDB unable to trace xchat on linux

[Sergio Durigan Junior]

On Tuesday, April 16 2013, mancha1@hush.com wrote:

> To reproduce:
>
> $ gdb /path/to/xchat
> (gdb) r
>
> xchat starts but hangs at "Looking up <insert server used here>".

What do you mean by "hangs"?  Is it unresponsible?  Can you still issue
commands on it?  Is it just waiting for the server to respond?

> xchat's faq (http://xchat.org/gdb/) suggests GDB has trouble debugging 
> when a server hostname is used. As they suggest, I ran a local ircd and 
> used 127.0.0.1. The problem remains.

The page doesn't suggest that.  It only suggests that you use the
server's IP address directly.  Anyway, have you tried that?  You could
try freenode's IP address (84.240.3.129) and see if it works.

-- 
Sergio

Re: GDB unable to trace xchat on linux

[mancha1]

On Tue, 16 Apr 2013 18:08:34 -0400 "Sergio Durigan Junior" 
<sergiodj@redhat.com> wrote:
>On Tuesday, April 16 2013, mancha1@hush.com wrote:
>
>> To reproduce:
>>
>> $ gdb /path/to/xchat
>> (gdb) r
>>
>> xchat starts but hangs at "Looking up <insert server used 
>here>".
>
>What do you mean by "hangs"?  Is it unresponsible?  Can you still 
>issue
>commands on it?  Is it just waiting for the server to respond?
>

By "hangs" I mean it doesn't progress beyond "Looking up...". I am
still able to navigate the menus and open pop-ups say via "About"
menus, etc. while in this state. However, it becomes totally
unresponsive if I Server->Disconnect or XChat->Quit.

>> xchat's faq (http://xchat.org/gdb/) suggests GDB has trouble 
>debugging 
>> when a server hostname is used. As they suggest, I ran a local 
>ircd and 
>> used 127.0.0.1. The problem remains.
>
>The page doesn't suggest that.  It only suggests that you use the
>server's IP address directly.  Anyway, have you tried that?  You 
>could
>try freenode's IP address (84.240.3.129) and see if it works.
>

I understood the FAQ. I ran an ircd locally to speed up my
debugging. No numeric IP works (freenode or otherwise).

To make this crystal clear: no connection progresses beyond the 
"looking up..." message: not hostname not IP, not local, not
remote, nor any permutations thereof.