[mythtv-users] Mytharchive problems

[SpEnT]

On 7/3/06, Paul Harrison <mythtv at dsl.pipex.com> wrote:
>
>
> SpEnT wrote:
> > On 7/3/06, Paul Harrison <mythtv at dsl.pipex.com> wrote:
> >
> >> OK, that makes more sense. You need to recompile mytharchive with
> >> debugging information then run mytharchivehelper under gdb to get a back
> >> trace. Basically do a make distclean then re-run ./configure adding the
> >> --compile-type=debug option then compile and install mytharchive as
> >> normal. Then  run
> >> mytharchivehelper under gdb like this:
> >> There's a more detailed description of how to get a bt here
> >> http://www.mythtv.org/docs/mythtv-HOWTO-22.html#ss22.2
> >>
> >
> > Following the instructions from the above link I get(and compiling
> > mytharchive with debug on):
> >
> > (no debugging symbols found)...(no debugging symbols found)...[Thread
> > debugging using libthread_db enabled]
> > [New Thread 1109785312 (LWP 15266)]
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 1109785312 (LWP 15266)]
> > 0x00000029 in ?? ()
> >
> > Thread 1 (Thread 1109785312 (LWP 15266)):
> > #0  0x00000029 in ?? ()
> > No symbol table info available.
> > #1  0x4144c948 in QMutex::~QMutex () from /usr/lib/qt3/lib/libqt-mt.so.3
> > No symbol table info available.
> > #2  0x00000000 in ?? ()
> > No symbol table info available.
> > #3  0x402ee950 in ?? () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #4  0x401fa42d in ErrorCatcher () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #5  0x4193dec8 in __cxa_finalize () from /lib/tls/libc.so.6
> > No symbol table info available.
> > #6  0x400cc823 in ?? () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #7  0x402cb000 in ?? () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #8  0x0000002e in ?? ()
> > No symbol table info available.
> > #9  0x0000002f in ?? ()
> > No symbol table info available.
> > #10 0x40015ff4 in ?? () from /lib/ld-linux.so.2
> > No symbol table info available.
> > #11 0x40dc122f in ?? ()
> > No symbol table info available.
> > #12 0x402ee950 in ?? () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #13 0xbffff698 in ?? ()
> > No symbol table info available.
> > #14 0x40261156 in _fini () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #15 0x40261156 in _fini () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #16 0x4000bfae in _dl_fini () at dl-fini.c:238
> >     i = 4
> >     l = /root/gdbcommands:7: Error in sourced command file:
> > Variable "l" is not available.
> >
> > Now where it says no debug symbols found I'm assuming it means from
> > myth itself so I rebuilt everything with debug: (and only ran it with
> > the lines you supplied to get rid of that error)
> > # gdb mytharchivehelper
> > GNU gdb 6.2-2.1.101mdk (Mandrakelinux)
> > Copyright 2004 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 "i586-mandrake-linux-gnu"...Using host
> > libthread_db library "/lib/tls/libthread_db.so.1".
> >
> > (gdb) run -p out
> > Starting program: /usr/local/bin/mytharchivehelper -p out
> > [Thread debugging using libthread_db enabled]
> > [New Thread 1110407904 (LWP 26327)]
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 1110407904 (LWP 26327)]
> > 0x00000029 in ?? ()
> > Current language:  auto; currently c
> > (gdb) thread apply all bt full
> >
> > Thread 1 (Thread 1110407904 (LWP 26327)):
> > #0  0x00000029 in ?? ()
> > No symbol table info available.
> > #1  0x41520948 in QMutex::~QMutex () from /usr/lib/qt3/lib/libqt-mt.so.3
> > No symbol table info available.
> > #2  0x40325fa8 in __JCR_LIST__ () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #3  0x40325fa8 in __JCR_LIST__ () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #4  0x4022acf0 in __tcf_1 () at util-x11.h:22
> > No locals.
> > #5  0x41a11ec8 in __cxa_finalize () from /lib/tls/libc.so.6
> > No symbol table info available.
> > #6  0x4010a0c3 in __do_global_dtors_aux () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #7  0x4028da06 in _fini () from /usr/local/lib/libmyth-0.19.so.0
> > No symbol table info available.
> > #8  0x4000bfae in _dl_fini () at dl-fini.c:238
> >         i = 4
> >         l = Variable "l" is not available.
> >
> > --
> > Lonny
> >
> The segfault is not in mytharchivehelper itself but in the destructor
> for QMutex which is part of QT. Its the extern QMutex x11_lock in
> util-x11.h which is part of  libmyth that is causing the problem. Why
> that is I've no idea I'm afraid :-(
>

Well either way I know what's wrong now :-) ... I'll try a new QT and
if that falls on its' face ... I'll just backup my database and
rebuild the machine with the latest Mandriva Powerpack. Gopefully I
can stay mostly RPM based and if not ... I just wont be able to stay
in "SVN" mode anymore ... I really wanted mytharchive working so I
could do a clean whipe and not lose any of my recordings but I can
suck it up ;-)

Anyway thanks for al lthe help Paul, I'll let you and anyone reading
this thread know how it goes.

--
Lonny

PS: This is my current levels of QT;
libqt3-devel-3.3.3-27.1.101mdk
qt3-common-3.3.3-27.1.101mdk
libqt3-mysql-3.3.3-31.mdk10.1.thac
libqt3-3.3.3-27.1.101mdk