[mythtv] Reproducible Backend Crash (0.18.1)
John Patrick Poet
john at BlueSkyTours.com
Fri Jul 8 19:09:31 EDT 2005
I also saw this problem around the time 18.1 was release, but have not seen
it with the latest svn. If you can reproduce it with the latest svn, then
someone will likely take a look at the problem.
None of the developers are going to take the time to go back to old code to
reproduce a problem which is fixed in the current code.
John
On Fri, 8 Jul 2005, Dave Sp wrote:
> Lucas Meijer wrote:
> >> So it seems I can reproduce this issue at will. What can I enable, or
> >> how
> >> can I run the backend/frontend, to help debug this issue?
> >
> >
> > Install current svn, see if it still happens, if it does run it in debug
> > mode (in the documentation somewhere at the end), and send the results
> > to this list..
> >
> > Bye, Lucas
> > _______________________________________________
>
>
> Thank you, Lucas.
>
> Before trying the latest, I re-compiled 0.18.1 with debug enabled (as per
> the instructions found in the doc) and ran mythbackend from gdb. After
> watching a program, I hit "d" to delete it, chose "Yes, delete", and
> mythbackend crashed. Below is the result; let me know if it really would
> be more helpful to run the latest CVS.
>
> (gdb) run
> Starting program: /usr/local/bin/mythbackend -l /var/tmp/mythbackend.log
> [Thread debugging using libthread_db enabled]
> [New Thread 1100848512 (LWP 17740)]
> [New Thread 1110346672 (LWP 17746)]
> [New Thread 1118739376 (LWP 17748)]
> [New Thread 1127132080 (LWP 17749)]
> [New Thread 1135524784 (LWP 17750)]
> [New Thread 1145047984 (LWP 17751)]
> [New Thread 1153440688 (LWP 17752)]
> [New Thread 1161833392 (LWP 17753)]
> [New Thread 1170226096 (LWP 17754)]
> [New Thread 1178618800 (LWP 17755)]
> [New Thread 1187011504 (LWP 17756)]
> [New Thread 1195404208 (LWP 17776)]
> [New Thread 1203796912 (LWP 17783)]
> [Thread 1195404208 (LWP 17776) exited]
> [New Thread 1195404208 (LWP 17788)]
> [Thread 1203796912 (LWP 17783) exited]
> [Thread 1195404208 (LWP 17788) exited]
> [New Thread 1195404208 (LWP 17800)]
> [New Thread 1203796912 (LWP 17801)]
> [New Thread 1238707120 (LWP 17802)]
> [New Thread 1247099824 (LWP 17803)]
> [New Thread 1255492528 (LWP 17804)]
> [Thread 1238707120 (LWP 17802) exited]
> [Thread 1247099824 (LWP 17803) exited]
> [Thread 1255492528 (LWP 17804) exited]
> [Thread 1203796912 (LWP 17801) exited]
> [Thread 1195404208 (LWP 17800) exited]
> [New Thread 1195404208 (LWP 17809)]
> [New Thread 1203796912 (LWP 17810)]
> [New Thread 1255492528 (LWP 17811)]
> [New Thread 1247099824 (LWP 17812)]
> [New Thread 1234717616 (LWP 17813)]
> [New Thread 1308134320 (LWP 17820)]
> [Thread 1308134320 (LWP 17820) exited]
> [New Thread 1308134320 (LWP 17832)]
> [Thread 1308134320 (LWP 17832) exited]
> [New Thread 1308134320 (LWP 17846)]
> [Thread 1308134320 (LWP 17846) exited]
> [New Thread 1308134320 (LWP 17870)]
> [Thread 1308134320 (LWP 17870) exited]
> [New Thread 1308134320 (LWP 17896)]
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1100848512 (LWP 17740)]
> 0x41333fda in QMutex::lock () from /usr/lib/qt3/lib/libqt-mt.so.3
> Current language: auto; currently c
> (gdb) thread apply all bt full
>
> Thread 29 (Thread 1308134320 (LWP 17896)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x4df88b0c in ?? ()
> No symbol table info available.
> #2 0x00000002 in ?? ()
> No symbol table info available.
> #3 0x415d10fe in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.0
> No symbol table info available.
>
> Thread 24 (Thread 1234717616 (LWP 17813)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x49984a88 in ?? ()
> No symbol table info available.
> #2 0x00000000 in ?? ()
> No symbol table info available.
> #3 0x49984960 in ?? ()
> No symbol table info available.
> #4 0x4178f981 in select () from /lib/tls/libc.so.6
> No symbol table info available.
> #5 0x403c5b85 in NuppelVideoRecorder::doVbiThread (this=0x817a378) at NuppelVideoRecorder.cpp:3140
> tv = {tv_sec = 4, tv_usec = 974000}
> rdset = {fds_bits = {131072, 0 <repeats 31 times>}}
> vbi = (vbi *) 0x0
> cc = (cc *) 0x8588ac0
> vbifd = 17
> vbicallbackdata = {nvr = 0x817a378, teletextpage = {pgno = 0, subno = 0, lang = 0, flags = 0,
> errors = 0, lines = 0, data = {'\0' <repeats 39 times> <repeats 25 times>}, flof = 0, link = {{
> pgno = 0, subno = 0}, {pgno = 0, subno = 0}, {pgno = 0, subno = 0}, {pgno = 0, subno = 0}, {
> pgno = 0, subno = 0}, {pgno = 0, subno = 0}}}, foundteletextpage = false}
> #6 0x403c094b in NuppelVideoRecorder::VbiThread (param=0x817a378) at NuppelVideoRecorder.cpp:2076
> nvr = (NuppelVideoRecorder *) 0x817a378
> #7 0x415ccb3c in start_thread () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #8 0x4179692a in clone () from /lib/tls/libc.so.6
> No symbol table info available.
>
> Thread 23 (Thread 1247099824 (LWP 17812)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x4a553790 in ?? ()
> No symbol table info available.
> #2 0x0000004f in ?? ()
> No symbol table info available.
> #3 0x41733490 in _IO_do_write () from /lib/tls/libc.so.6
> No symbol table info available.
> #4 0x4173342e in _IO_do_write () from /lib/tls/libc.so.6
> No symbol table info available.
> #5 0x41734122 in _IO_file_sync () from /lib/tls/libc.so.6
> No symbol table info available.
> #6 0x4172922c in fflush () from /lib/tls/libc.so.6
> No symbol table info available.
> #7 0x4164d9c0 in std::time_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::put ()
> from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #8 0x4164fe54 in std::ostream::flush () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #9 0x4164feed in std::flush<char, std::char_traits<char> > () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #10 0x41651daa in std::endl<char, std::char_traits<char> > () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #11 0x4164f0ef in std::ostream::operator<< () from /usr/lib/libstdc++.so.6
> No symbol table info available.
> #12 0x403c1d1f in NuppelVideoRecorder::doAudioThread (this=0x817a378) at NuppelVideoRecorder.cpp:2168
> dtmp = {d = {jd = 2453560}, t = {ds = 61114662}}
> dtime = {static null = {static null = <same as static member of an already seen type>,
> d = 0x80d0fc0, static shared_null = 0x80d0fc0}, d = 0x8703a40, static shared_null = 0x80d0fc0}
> verbose_macro_tmp = <incomplete type>
> afmt = 16
> afd = 16
> buffer = (
> unsigned char *) 0x8598c90 "\fî\212\002¶óá\003 ÷3\f&øõ\004\033ö÷ÿ¼÷g\002wø¿ÿÉúëûcø\006ù¸úe÷8ûÙùàùRû×þÝùnüëüà\001ûÿ@\003³ûWÿ\026õ\\ý\202ös\0026ïÅý\023îHõúêàð\033éâó^ïQõ\037ô\226ñlñ¼ï"
> trigger = 1
> act = 190
> lastread = 1984
> frag = 524298
> anow = {tv_sec = 1120859914, tv_usec = 571930}
> blocksize = 4096
> ispace = {fragments = 1, fragstotal = 2, fragsize = 1024, bytes = 1952}
> #13 0x403c091d in NuppelVideoRecorder::AudioThread (param=0x817a378) at NuppelVideoRecorder.cpp:2067
> nvr = (NuppelVideoRecorder *) 0x817a378
> #14 0x415ccb3c in start_thread () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #15 0x4179692a in clone () from /lib/tls/libc.so.6
> No symbol table info available.
>
> Thread 22 (Thread 1255492528 (LWP 17811)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x4ad54908 in ?? ()
> No symbol table info available.
> #2 0x405969a8 in __JCR_LIST__ () from /usr/local/lib/libmythtv-0.18.1.so.0
> No symbol table info available.
> #3 0x00000000 in ?? ()
> No symbol table info available.
> #4 0x41760956 in nanosleep () from /lib/tls/libc.so.6
> No symbol table info available.
> #5 0x4179024a in usleep () from /lib/tls/libc.so.6
> No symbol table info available.
> #6 0x403c648e in NuppelVideoRecorder::doWriteThread (this=0x817a378) at NuppelVideoRecorder.cpp:3284
> action = NuppelVideoRecorder::ACTION_NONE
> firsttimecode = -1
> #7 0x403c08ef in NuppelVideoRecorder::WriteThread (param=0x817a378) at NuppelVideoRecorder.cpp:2058
> nvr = (NuppelVideoRecorder *) 0x817a378
> #8 0x415ccb3c in start_thread () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #9 0x4179692a in clone () from /lib/tls/libc.so.6
> No symbol table info available.
>
> Thread 21 (Thread 1203796912 (LWP 17810)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x47c04c38 in ?? ()
> No symbol table info available.
> #2 0x00000024 in ?? ()
> No symbol table info available.
> #3 0x41734b29 in _IO_file_xsputn () from /lib/tls/libc.so.6
> No symbol table info available.
> #4 0x41714b7d in vfprintf () from /lib/tls/libc.so.6
> No symbol table info available.
> #5 0x41710a05 in vfprintf () from /lib/tls/libc.so.6
> No symbol table info available.
> #6 0x4171951f in fprintf () from /lib/tls/libc.so.6
> No symbol table info available.
> #7 0x41726f24 in perror () from /lib/tls/libc.so.6
> No symbol table info available.
> #8 0x403bc1ed in NuppelVideoRecorder::StartRecording (this=0x817a378) at NuppelVideoRecorder.cpp:1152
> vc = {name = "BT878 video (ATI TV-Wonder)\000\000\000\000", type = 171, channels = 3,
> audios = 1, maxwidth = 768, maxheight = 480, minwidth = 48, minheight = 32}
> buf = (
> unsigned char *) 0x4b5eb000 '\020' <repeats 11 times>, "\024\026\022\020\020\021\023\023\022\021\021\023\024\023\023\021\024\027\027\025\022\020\020\022\023\024\030\027\030\021\021\020\024\027\027\025\022\021\020\021\022\024\026\026\025\022\024\025\031\031\026\023\023\025\025\023\022\021\021\023\022\026\027\030\030\027\026\024\024\022\022\024\024\026\025\025\026\030\031\030\032\031\033\027\022\020\020\022\027\032\030\024\022\022\022\025\026\031\030\030\025\022\023\023\026\025\026\024\025\022\022\021\023\024\026\031\030\027\022\020\020\020\021\023\030\030\031\031\032\030\026\024\024\023\023\025\024\026\026\021\022\020\024\027\031\026\023\021\024\026\023\024\025\030\032\032\030\027\026\022\020\022\027\032\030\022\021\024\027\030\023\021\020\021\025\030\032\027\022\020\020\024\025\022\020\020\023\026\024"...
> vm = {size = 34078720, frames = 16, offsets = {0, 2129920, 4259840, 6389760, 8519680, 10649600,
> 12779520, 14909440, 17039360, 19169280, 21299200, 23429120, 25559040, 27688960, 29818880, 31948800,
> 0 <repeats 16 times>}}
> va = {audio = 0, volume = 58981, bass = 32768, treble = 32768, flags = 30,
> name = "Television\000\000\000\000\000", mode = 3, balance = 32768, step = 0}
> channelinput = 0
> frame = 1
> mm = {frame = 1, height = 480, width = 720, format = 15}
> vchan = {channel = 0, name = "Television", '\0' <repeats 21 times>, tuners = 1, flags = 3,
> type = 1, norm = 1}
> vt = {tuner = 0, name = '\0' <repeats 31 times>, rangelow = 0, rangehigh = 0, flags = 0,
> mode = 0, signal = 0}
> syncerrors = 9
> #9 0x403cbe3a in SpawnEncode (param=0x817a378) at tv_rec.cpp:48
> nvr = (class RecorderBase *) 0x817a378
> #10 0x415ccb3c in start_thread () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #11 0x4179692a in clone () from /lib/tls/libc.so.6
> No symbol table info available.
>
> Thread 20 (Thread 1195404208 (LWP 17809)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x47406a48 in ?? ()
> No symbol table info available.
> #2 0x000118de in ?? ()
> No symbol table info available.
> #3 0x47c08008 in ?? ()
> No symbol table info available.
> #4 0x415d133b in __write_nocancel () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #5 0x402622a0 in safe_write (fd=15, data=0x47c08008, sz=71902) at RingBuffer.cpp:91
> ret = 203382
> tot = 0
> errcnt = 0
> #6 0x40263073 in ThreadedFileWriter::DiskLoop (this=0x8115718) at RingBuffer.cpp:299
> first_chunk_size = 203382
> second_chunk_size = 71902
> size = 203382
> written = 297632
> timer = {ds = 61114509}
> #7 0x4026234d in ThreadedFileWriter::boot_writer (wotsit=0x8115718) at RingBuffer.cpp:120
> fw = (ThreadedFileWriter *) 0x8115718
> #8 0x415ccb3c in start_thread () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #9 0x4179692a in clone () from /lib/tls/libc.so.6
> No symbol table info available.
>
> Thread 11 (Thread 1187011504 (LWP 17756)):
> #0 0xffffe410 in ?? ()
> No symbol table info available.
> #1 0x080f7538 in ?? ()
> No symbol table info available.
> #2 0x00000131 in ?? ()
> No symbol table info available.
> #3 0x00000000 in ?? ()
> No symbol table info available.
> #4 0x415ceb22 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
> No symbol table info available.
> #5 0x413357db in QWaitCondition::wait () from /usr/lib/qt3/lib/libqt-mt.so.3
> No symbol table info available.
> #6 0x080f75c0 in ?? ()
> No symbol table info available.
> #7 0x080f759c in ?? ()
> No symbol table info available.
> #8 0x46c05a58 in ?? ()
> No symbol table info available.
> #9 0x413342fe in QRealMutexPrivate::unlock () from /usr/lib/qt3/lib/libqt-mt.so.3
> No symbol table info available.
> #10 0x46c05a64 in ?? ()
> No symbol table info available.
> #11 0x414e0aa8 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
> No symbol table info available.
> #12 0x41334002 in QMutex::unlock () from /usr/lib/qt3/lib/libqt-mt.so.3
> No symbol table info available.
> #13 0x080f70a0 in ?? ()
> No symbol table info available.
> #14 0x414e0aa8 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
> No symbol table info available.
> #15 0x46c05a58 in ?? ()
> No symbol table info available.
> #16 0x414e0aa8 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
> No symbol table info available.
> #17 0x080f754c in ?? ()
> No symbol table info available.
> #18 0x46c05a90 in ?? ()
> No symbol table info available.
> #19 0x46c05a78 in ?? ()
> No symbol table info available.
> #20 0x0809866f in ProcessRequestThread::run (this=0x1) at mainserver.cpp:69
> No locals.
> Previous frame inner to this frame (corrupt stack?)
> #0 0x41333fda in QMutex::lock () from /usr/lib/qt3/lib/libqt-mt.so.3
> (gdb)
>
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