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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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.
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