[Gambas-devel] Some wierd gdb behaviour (I think)

[Ron]

Ron schreef:
>
> Hi,
>
> Been trying to debug my program, because after adding some 
> functionality every now and then it crashes (gambas), before that it 
> was rock stable.
> But upgraded from 2.8.1 to 2.8.2 in the meantime also...
>
> I compile and start my program like the website says, this is what I get:
>
> -----------------
> ron at ...218...:~/domotiga/DomotiGa$ gdb gbx2
> GNU gdb 6.4.90-debian
> Copyright (C) 2006 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and 
> you are
> welcome to change it and/or distribute copies of it under certain 
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for 
> details.
> This GDB was configured as "i486-linux-gnu"...Using host libthread_db 
> library "/lib/tls/i686/cmov/libthread_db.so.1".
>
> (gdb) set args -p
> (gdb) run
> Starting program: /usr/local/bin/gbx2 -p
> Failed to read a valid object file image from memory.
> [Thread debugging using libthread_db enabled]
> [New Thread -1209992992 (LWP 8372)]
> [New Thread -1231660112 (LWP 8376)]
> [New Thread -1242149968 (LWP 8377)]
> [Thread -1242149968 (zombie) exited]
> [Thread -1231660112 (LWP 8376) exited]
> [New Thread -1231660112 (LWP 8378)]
> [New Thread -1242149968 (LWP 8379)]
> [New Thread -1250542672 (LWP 8380)]
> [Thread -1250542672 (zombie) exited]
> [New Thread -1250542672 (LWP 8381)]
> open /dev/sequencer: No such file or directory
> Qt: gdb: -nograb added to command-line options.
>         Use the -dograb option to enforce grabbing.
> [New Thread -1266635856 (LWP 8385)]
> [Thread -1266635856 (LWP 8385) exited]
> [New Thread -1266635856 (LWP 8386)]
> [Thread -1266635856 (LWP 8386) exited]
> [New Thread -1266635856 (LWP 8390)]
> [Thread -1266635856 (LWP 8390) exited]
> [New Thread -1266635856 (LWP 8391)]
> [Thread -1266635856 (LWP 8391) exited]
> Segmentation fault (core dumped)
> ron at ...218...:~/domotiga/DomotiGa$
> --------
>
> the first thing that worries me, are the 2 zombie threads in the 
> beginning, is this normal?
>
> Then when I click a certain menu, which lanches a part of my program 
> which calls rrdtool to generate graphs (SHELL sRRDCmd2 WAIT) were 
> sRRDCmd2 is a large command string which calls rrdtool graph...
>
> the gdb session gives Segmentation fault (core dumped)
> ron at ...218...:~/domotiga/DomotiGa$
> and the gdb session is closed, my program continues to run...
>
> Is this normal? Because I started another program in the shell? My 
> gambas program still runs and functions ok after this...
> What is wrong? This way I cannot debug my program without removing 
> some functionality first.
> Did I overlook something?
>
> Gambas 2.8.2 on Debian 4.0etch3
>
> Wanted to run it as root, but it's a headless server, and cannot get X 
> to run remote for root... will have to look tomorrow...
> Do you need to run it as root to get the debugging info (see the 
> Failed to read a valid object file image from memory. error)
>
> Regards,
> Ron_2nd
>
>

No one with any help/pointers?

Gambas 2 (even latest svn) crashes every few minutes here with signal 
11, even older versions of my project.
Debian etch's gdb is f at ...610...&* up, so it doesn't give me a backtrace... it  
even drops me to the shell prompt with my program still running.

My project development has halted for a week now, still trying to 
pinpoint with project part is giving me troubles.
I'm even considering abandoning gambas alltogether, it's simply not 
stable/usable anymore.
Would be a pitty...

Regards,
Ron