[mythtv] [BT] of segfault related to In-progress recording and
GetNextFreeRecorder..
Oscar Carlsson
oscar.carlsson at home.se
Fri Feb 27 05:39:19 EST 2004
Hello Development,
at least that's what i think it's about..
This happens if i'm at card 1 (i've got two cards), watching live tv, bring up
the epg and start a recording on something. Strange thing is that it works
sometimes, and it does seem to work better when run under gdb, took a while to
get a segfault.
If I first switch to card 2, then do the rec from the epg, it doesn't seem to
happen. Also, i see the getnextfreerecorder return -1, is it supposed to do
that? (when there's a card left not in use)
Below is the trace.
mythtv at dragon mythtv $ gdb mythbackend
GNU gdb 6.0
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
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Type "show copying" to see the conditions.
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This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/local/bin/mythbackend
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 2059)]
Starting up as the master server.
[New Thread 32769 (LWP 2068)]
[New Thread 16386 (LWP 2069)]
[New Thread 32771 (LWP 2071)]
[New Thread 49156 (LWP 2072)]
[New Thread 65541 (LWP 2073)]
[New Thread 81926 (LWP 2074)]
2004-02-27 11:29:36 mythbackend version: 0.15.20040225-1 www.mythtv.org
2004-02-27 11:29:36 Enabled verbose msgs : important general
[New Thread 98311 (LWP 2075)]
[New Thread 114696 (LWP 2076)]
[New Thread 131081 (LWP 2077)]
[New Thread 147466 (LWP 2078)]
[New Thread 163851 (LWP 2079)]
2004-02-27 11:29:36 Found changes in the todo list.
2004-02-27 11:29:37 Started recording "Tune in" on channel: 8 on cardid: 1, sourceid 1
[New Thread 180236 (LWP 2080)]
2004-02-27 11:29:37 Changing from None to RecordingOnly
[New Thread 196621 (LWP 2081)]
2004-02-27 11:30:01 MainServer::HandleAnnounce Playback
2004-02-27 11:30:01 adding: dragon as a client (events: 0)
2004-02-27 11:30:01 MainServer::HandleAnnounce Playback
2004-02-27 11:30:01 adding: dragon as a client (events: 1)
2004-02-27 11:30:04 Changing from RecordingOnly to None
[New Thread 213006 (LWP 2092)]
2004-02-27 11:30:04 Found changes in the todo list.
2004-02-27 11:30:06 Getting next free recorder : -1
2004-02-27 11:30:06 MainServer::HandleAnnounce Playback
2004-02-27 11:30:06 adding: dragon as a client (events: 0)
[New Thread 229391 (LWP 2095)]
2004-02-27 11:30:06 MainServer::HandleAnnounce Playback
2004-02-27 11:30:06 adding: dragon as a client (events: 0)
2004-02-27 11:30:06 adding: dragon as a remote ringbuffer
2004-02-27 11:30:08 Changing from None to WatchingLiveTV
[New Thread 245776 (LWP 2096)]
2004-02-27 11:30:22 Found changes in the todo list.
2004-02-27 11:30:23 Changing from WatchingLiveTV to None
2004-02-27 11:30:23 Started recording "Hitparad" on channel: 6 on cardid: 1, sourceid 1
[New Thread 262161 (LWP 2102)]
2004-02-27 11:30:24 Changing from None to RecordingOnly
[New Thread 278546 (LWP 2103)]
2004-02-27 11:30:24 MainServer::HandleAnnounce Playback
2004-02-27 11:30:24 adding: dragon as a client (events: 0)
2004-02-27 11:30:24 MainServer::HandleAnnounce Playback
2004-02-27 11:30:24 adding: dragon as a client (events: 0)
2004-02-27 11:31:17 Getting next free recorder : -1
2004-02-27 11:31:17 MainServer::HandleAnnounce Playback
2004-02-27 11:31:17 adding: dragon as a client (events: 0)
[New Thread 294931 (LWP 2110)]
2004-02-27 11:31:17 MainServer::HandleAnnounce Playback
2004-02-27 11:31:17 adding: dragon as a client (events: 0)
2004-02-27 11:31:17 adding: dragon as a remote ringbuffer
2004-02-27 11:31:19 Changing from None to WatchingLiveTV
[New Thread 311316 (LWP 2111)]
2004-02-27 11:31:24 Changing from WatchingLiveTV to None
2004-02-27 11:31:24 Getting next free recorder : 2
2004-02-27 11:31:24 MainServer::HandleAnnounce Playback
2004-02-27 11:31:24 adding: dragon as a client (events: 0)
[New Thread 327701 (LWP 2116)]
2004-02-27 11:31:24 MainServer::HandleAnnounce Playback
2004-02-27 11:31:24 adding: dragon as a client (events: 0)
2004-02-27 11:31:24 adding: dragon as a remote ringbuffer
2004-02-27 11:31:26 Changing from None to WatchingLiveTV
[New Thread 344086 (LWP 2117)]
2004-02-27 11:31:32 Changing from WatchingLiveTV to None
2004-02-27 11:31:37 Changing from RecordingOnly to None
2004-02-27 11:31:37 Found changes in the todo list.
[New Thread 360471 (LWP 2122)]
2004-02-27 11:31:39 Getting next free recorder : -1
2004-02-27 11:31:39 MainServer::HandleAnnounce Playback
2004-02-27 11:31:39 adding: dragon as a client (events: 0)
[New Thread 376856 (LWP 2125)]
2004-02-27 11:31:39 MainServer::HandleAnnounce Playback
2004-02-27 11:31:39 adding: dragon as a client (events: 0)
2004-02-27 11:31:39 adding: dragon as a remote ringbuffer
2004-02-27 11:31:41 Changing from None to WatchingLiveTV
[New Thread 393241 (LWP 2126)]
2004-02-27 11:31:45 Changing from WatchingLiveTV to None
2004-02-27 11:31:46 Getting next free recorder : 1
2004-02-27 11:31:46 MainServer::HandleAnnounce Playback
2004-02-27 11:31:46 adding: dragon as a client (events: 0)
[New Thread 409626 (LWP 2131)]
2004-02-27 11:31:46 MainServer::HandleAnnounce Playback
2004-02-27 11:31:46 adding: dragon as a client (events: 0)
2004-02-27 11:31:46 adding: dragon as a remote ringbuffer
2004-02-27 11:31:48 Changing from None to WatchingLiveTV
[New Thread 426011 (LWP 2132)]
2004-02-27 11:31:58 Found changes in the todo list.
2004-02-27 11:31:58 Started recording "Dr Phil" on channel: 4 on cardid: 1, sourceid 1
[New Thread 442396 (LWP 2138)]
2004-02-27 11:31:58 Changing from None to RecordingOnly
[New Thread 458781 (LWP 2139)]
2004-02-27 11:32:21 Changing from WatchingLiveTV to None
2004-02-27 11:32:25 Changing from RecordingOnly to None
[New Thread 475166 (LWP 2140)]
2004-02-27 11:32:26 Found changes in the todo list.
2004-02-27 11:32:28 Getting next free recorder : -1
2004-02-27 11:32:28 MainServer::HandleAnnounce Playback
2004-02-27 11:32:28 adding: dragon as a client (events: 0)
[New Thread 491551 (LWP 2143)]
2004-02-27 11:32:28 MainServer::HandleAnnounce Playback
2004-02-27 11:32:28 adding: dragon as a client (events: 0)
2004-02-27 11:32:28 adding: dragon as a remote ringbuffer
2004-02-27 11:32:29 Changing from None to WatchingLiveTV
[New Thread 507936 (LWP 2144)]
2004-02-27 11:32:39 Found changes in the todo list.
2004-02-27 11:32:59 Changing from WatchingLiveTV to None
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 147466 (LWP 2078)]
0x0805a7b8 in RingBuffer::GetStopReads() (this=0x0) at RingBuffer.h:50
50 RingBuffer.h: No such file or directory.
in RingBuffer.h
(gdb) thread apply all bt full
Thread 12 (Thread 163851 (LWP 2079)):
#0 0x410cb724 in __pthread_sigsuspend () from /lib/libpthread.so.0
No symbol table info available.
#1 0x410cb568 in __pthread_wait_for_restart_signal () from /lib/libpthread.so.0
No symbol table info available.
#2 0x410ccd80 in __pthread_alt_lock () from /lib/libpthread.so.0
No symbol table info available.
#3 0x410c9e57 in pthread_mutex_lock () from /lib/libpthread.so.0
No symbol table info available.
#4 0x40ef898c in QRecursiveMutexPrivate::lock() () from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x40ef8d94 in QMutex::lock() () from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
#6 0x0808b94f in QMutexLocker (this=0x44e94804, m=0x80d0da8) at qmutex.h:96
No locals.
#7 0x08080d0b in Scheduler::getAllPending(QStringList&) (this=0x80d8330, strList=@0x44e94854)
at scheduler.cpp:519
lockit = {mtx = 0x80d0da8}
now = {d = {jd = 0}, t = {ds = 1091358331}}
i = {<_List_iterator_base> = {_M_node = 0x410d3d78}, <No data fields>}
#8 0x0806b91e in MainServer::HandleGetPendingRecordings(PlaybackSock*) (this=0x80d8148,
pbs=0x80db520) at mainserver.cpp:1329
pbssock = (struct QSocket *) 0x8104a00
strList = {<QValueList<QString>> = {sh = 0x4730f160}, <No data fields>}
#9 0x080616a9 in MainServer::ProcessRequest(QSocket*) (this=0x80d8148, sock=0x8104a00)
at mainserver.cpp:266
listline = {<QValueList<QString>> = {sh = 0x4730f1e0}, <No data fields>}
line = {static null = {static null = <same as static member of an already seen type>,
d = 0x80a8aa0, static shared_null = 0x80a8aa0}, d = 0x4730f950,
static shared_null = 0x80a8aa0}
tokens = {<QValueList<QString>> = {sh = 0x4730edf0}, <No data fields>}
command = {static null = {static null = <same as static member of an already seen type>,
d = 0x80a8aa0, static shared_null = 0x80a8aa0}, d = 0x4730f950,
static shared_null = 0x80a8aa0}
pbs = (PlaybackSock *) 0x80db520
#10 0x0807c110 in ProcessRequestThread::run() (this=0x80cfc50) at mainserver.cpp:66
No locals.
#11 0x40c0a60a in QThreadInstance::start(void*) () from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
#12 0x410c8f60 in pthread_start_thread () from /lib/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#13 0x410c9062 in pthread_start_thread_event () from /lib/libpthread.so.0
No symbol table info available.
#14 0x412cd6ba in clone () from /lib/libc.so.6
No symbol table info available.
Thread 11 (Thread 147466 (LWP 2078)):
#0 0x0805a7b8 in RingBuffer::GetStopReads() (this=0x0) at RingBuffer.h:50
No locals.
#1 0x40307ad6 in TVRec::RequestRingBufferBlock(int) (this=0x80d03b8, size=256000)
at tv_rec.cpp:2014
buffer = "\000\000\001ºD\002w÷\204\001\0013\237ø\000\000\001à\aì\200\000\001ÿ¢I¶©ÅÝ\204;\204ð\025\000\177\001øg\000\036\030NLú\212!\205¨A¬}iù\aN×\235\207.ö\211Ôçùø\233\006/ÿ½\226F\035y°\23416G¢\211Ðg*$\202\f(5\030¼«Æ\024 ñ@\eK\214\023èq(2ï\e[B¨qL\"ü]ÝæÆ|q÷\224Pd\025å\205µ\035À\a\222¨\222\001\216Â!\026,°\224\203\027ÿÓ\203I\016\235W\\\a©'½2\230TÁ-p\000\000\001\0272\025<\036Dp\r@쳨m6\032°Ô?=\016\"¥½*Ü*\2305KÞÈßÏ"...
tot = 0
ret = 0
#2 0x08059e70 in EncoderLink::RequestRingBufferBlock(int) (this=0x80d3578, size=256000)
at encoderlink.cpp:609
No locals.
#3 0x08070d55 in MainServer::HandleRecorderQuery(QStringList&, QStringList&, PlaybackSock*) (
this=0x80d8148, slist=@0x44c94a14, commands=@0x44c949f4, pbs=0x4730d4f0)
at mainserver.cpp:1944
size = 256000
ret = 1
pbssock = (struct QSocket *) 0x8110cf0
recnum = 1
iter = {node = 0x80ba060}
enc = (EncoderLink *) 0x80d3578
command = {static null = {static null = <same as static member of an already seen type>,
d = 0x80a8aa0, static shared_null = 0x80a8aa0}, d = 0x80e4680, static shared_null = 0x80a8aa0}
retlist = {<QValueList<QString>> = {sh = 0x8105338}, <No data fields>}
#4 0x08061a6d in MainServer::ProcessRequest(QSocket*) (this=0x80d8148, sock=0x8110cf0)
at mainserver.cpp:292
listline = {<QValueList<QString>> = {sh = 0x8105420}, <No data fields>}
line = {static null = {static null = <same as static member of an already seen type>,
d = 0x80a8aa0, static shared_null = 0x80a8aa0}, d = 0x80db0e8, static shared_null = 0x80a8aa0}
tokens = {<QValueList<QString>> = {sh = 0x811b088}, <No data fields>}
command = {static null = {static null = <same as static member of an already seen type>,
d = 0x80a8aa0, static shared_null = 0x80a8aa0}, d = 0x80fc088, static shared_null = 0x80a8aa0}
---Type <return> to continue, or q <return> to quit---
pbs = (PlaybackSock *) 0x4730d4f0
#5 0x0807c110 in ProcessRequestThread::run() (this=0x80ceb60) at mainserver.cpp:66
No locals.
#6 0x40c0a60a in QThreadInstance::start(void*) () from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
#7 0x410c8f60 in pthread_start_thread () from /lib/libpthread.so.0
No symbol table info available.
#8 0x410c9062 in pthread_start_thread_event () from /lib/libpthread.so.0
No symbol table info available.
#9 0x412cd6ba in clone () from /lib/libc.so.6
No symbol table info available.
Thread 10 (Thread 131081 (LWP 2077)):
#0 0x410cb724 in __pthread_sigsuspend () from /lib/libpthread.so.0
No symbol table info available.
#1 0x410cb568 in __pthread_wait_for_restart_signal () from /lib/libpthread.so.0
No symbol table info available.
#2 0x410c7f3b in pthread_cond_wait at GLIBC_2.0 () from /lib/libpthread.so.0
No symbol table info available.
#3 0x40ef9dc8 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
#4 0x080d84bc in ?? ()
No symbol table info available.
#5 0x44a94a1c in ?? ()
No symbol table info available.
#6 0x40ef84d2 in QRealMutexPrivate::lock() () from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
Previous frame inner to this frame (corrupt stack?)
0x0805a7b8 50 in RingBuffer.h
(gdb)
/Oscar
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