[mythtv] mythfrontend segfault

[dave sailer]

Stuart Auchterlonie wrote:

>On Fri, Nov 18, 2005 at 02:23:26AM -0500, dave sailer wrote:
>  
>
>>dave sailer wrote:
>>
>>    
>>
>>>dave sailer wrote:
>>>
>>>      
>>>
>>>>i had a working mythfrontend that suddenly started to segfault while 
>>>>playing live tv. It plays recorded content ok. I'm using gentoo and 
>>>>the only  way i could figure out how to compile with debug was to 
>>>>download the tar and install from source so I have a gentoo/emerge 
>>>>version in /usr/bin/mythfrontend and the newly compiled from source 
>>>>version in /usr/local/bin/mythfrontend.  I followed the steps to 
>>>>compile for debug but I'm guessing it didn't work (missing symbol 
>>>>tables). Here is the output from the full test, which was simply 
>>>>starting the frontend and playing live tv. Live tv plays for about 3 
>>>>seconds before segfaulting...
>>>>
>>>>
>>>>
>>>>myth1 mythtv-0.18.1 # gdb /usr/local/bin/mythfrontend
>>>>GNU gdb 6.0
>>>>Copyright 2003 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 "i686-pc-linux-gnu"...Using host 
>>>>libthread_db library "/lib/libthread_db.so.1".
>>>>
>>>>
>>>>        
>>>>
>>>I noticed today that this may be related to use of he epg. I get the 
>>>same segfault if I try to schedule a recording with the epg.
>>>
>>>
>>>any hints at all?
>>>      
>>>
>
>Firstly make sure you have only one version installed.
>If you have /usr/bin/mythfrontend + /usr/local/bin/mythfrontend
>sort that out first, since you are testing, delete the one installed
>with your distro's package management.
>
>I've found trying to debug the frontend works better if you
>attach gdb to the frontend rather than trying to run it under
>the frontend.
>
>Start up the frontend (the debug build of course)
>Change to another window, or log in from a different machine.
>find the pid of the frontend. Then run
>
>gdb /usr/local/bin/mythfrontend <pid>
>
>then gdb will attach itself to the frontend. Do 'cont' instead
>of run then do whatever you do to cause it to break. Then you
>can get a backtrace.
>
>Finest backtrace method. (gdb commands)
>
>set logging file name-of-logfile-with-backtrace.txt
>set logging on
>thread apply all bt full
>set logging off
>
>
>Stuart
>
>  
>
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>
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>  
>
that didn't go too well. When I ran...
./configure --compile-type=debug

it seemed to run ok, generated a config.h and config.mak, but...


myth1 mythtv-0.18.1 # make
make: *** No targets specified and no makefile found.  Stop.