[mythtv] Re: Re: SIGSEGV at end of recording
Michael J. Sherman
msherman at dsbox.com
Sun May 22 14:01:37 UTC 2005
> > I have also been seeing this exact behavior. My backtrace looks
> > exactly like yours below. Today I completely cleaned out my DB,
> > installed a fresh Myth, and even reinstalled ivtv and upgraded all
> FC3
> > packages via apt. Still the problem persists.
> >
> > The crash is in QMutex::lock. I have Fedora Core 3 with an AverMedia
> > M179. Seems like it was working until late April, and ever since then
> > (I do CVS updates weekly) it will crash often after recordings
> finish.
>
> Is this with _current_ cvs? A commit of mine from a day ago may have
> had
> caused this to change for the better (or not)..
CVS pulled at 11:13am on May 21 (Saturday). I also got a similar crash
not after the recording finished, but after the commercial flagging
finished. But the crash was still with the QMutex::lock. Checking
back through the archives, it seems a few folks have been getting this
crash after recordings finish, after commercial flagging, and after
deleting via MythWeb.
Below is the complete backtrace of a crash after a recording finished.
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208822080 (LWP 21729)]
0x04d8af4c in QMutex::lock () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
(gdb) thread apply all bt full
Thread 14 (Thread -1223775312 (LWP 22662)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x0024631b in __waitpid_nocancel () from /lib/tls/libpthread.so.0
No symbol table info available.
#2 0x00f57597 in myth_system (command=@0xb70ea3e0, flags=0) at
util.cpp:724
status = 3929
lirc_lock = {events_locked = false}
joystick_lock = {events_locked = false}
child = 22663
#3 0x009b3671 in JobQueue::DoFlagCommercialsThread (this=0x97b1398) at
jobqueue.cpp:1678
key = {static null = {static null = <same as static member of
an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x9822958,
static shared_null = 0x978e0c0}
logDesc = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x9813af0,
static shared_null = 0x978e0c0}
msg = {static null = {static null = <same as static member of
an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x981d6b0,
static shared_null = 0x978e0c0}
program_info = (ProgramInfo *) 0x982bc60
controlFlagging = 0
jobID = 4
stillRecording = false
breaksFound = 0
cmd = {static null = {static null = <same as static member of
an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x9820368,
static shared_null = 0x978e0c0}
#4 0x009b25bb in JobQueue::FlagCommercialsThread (param=0x97b1398) at
jobqueue.cpp:1613
theFlagger = (JobQueue *) 0x97b1398
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
Thread 11 (Thread -1211184208 (LWP 21749)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x00242a86 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/libpthread.so.0
No symbol table info available.
#2 0x04d8c3e5 in QWaitCondition::wait () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#3 0x0809d931 in ProcessRequestThread::run (this=0x97b4918) at
mainserver.cpp:73
No locals.
#4 0x04a90431 in QThreadInstance::start () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
Thread 10 (Thread 156253104 (LWP 21748)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x00242a86 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/libpthread.so.0
No symbol table info available.
#2 0x04d8c3e5 in QWaitCondition::wait () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#3 0x0809d931 in ProcessRequestThread::run (this=0x97ba180) at
mainserver.cpp:73
No locals.
#4 0x04a90431 in QThreadInstance::start () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
Thread 9 (Thread 119761840 (LWP 21747)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x00242a86 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/libpthread.so.0
No symbol table info available.
#2 0x04d8c3e5 in QWaitCondition::wait () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#3 0x0809d931 in ProcessRequestThread::run (this=0x97b0668) at
mainserver.cpp:73
No locals.
#4 0x04a90431 in QThreadInstance::start () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
Thread 8 (Thread 93682608 (LWP 21746)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x00242a86 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/libpthread.so.0
No symbol table info available.
#2 0x04d8c3e5 in QWaitCondition::wait () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#3 0x0809d931 in ProcessRequestThread::run (this=0x97b58f0) at
mainserver.cpp:73
No locals.
#4 0x04a90431 in QThreadInstance::start () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
Thread 7 (Thread 56138672 (LWP 21745)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x00242a86 in pthread_cond_wait@@GLIBC_2.3.2 () from
/lib/tls/libpthread.so.0
No symbol table info available.
#2 0x04d8c3e5 in QWaitCondition::wait () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#3 0x0809d931 in ProcessRequestThread::run (this=0x97acd58) at
mainserver.cpp:73
No locals.
#4 0x04a90431 in QThreadInstance::start () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
Thread 6 (Thread 42953648 (LWP 21743)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x046581a6 in __nanosleep_nocancel () from /lib/tls/libc.so.6
No symbol table info available.
#2 0x04657fac in sleep () from /lib/tls/libc.so.6
No symbol table info available.
#3 0x009a61a0 in JobQueue::ProcessQueue (this=0x97b1398) at
jobqueue.cpp:470
queueStartTimeStr = {static null = {
static null = <same as static member of an already seen type>, d =
0x978e0c0,
static shared_null = 0x978e0c0}, d = 0x98dc7a8, static shared_null
= 0x978e0c0}
queueStartTime = 0
atMax = true
status = 4
hostname = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x98a78f0,
static shared_null = 0x978e0c0}
---Type <return> to continue, or q <return> to quit---
maxJobs = 1
queueEndTimeStr = {static null = {
static null = <same as static member of an already seen type>, d =
0x978e0c0,
static shared_null = 0x978e0c0}, d = 0x98be110, static shared_null
= 0x978e0c0}
message = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x9832918,
static shared_null = 0x978e0c0}
tmpStr = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x9843358,
static shared_null = 0x978e0c0}
inTimeWindow = true
type = 2
id = 4
jobStatus = {sh = 0x97de100}
curQTime = {ds = 85343751}
starttime = {d = {jd = 2453512}, t = {ds = 83100000}}
flags = 0
sleepTime = 60
curTime = 2342
startedJobAlready = false
chanid = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x984a7d8,
static shared_null = 0x978e0c0}
startts = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x98a7858,
static shared_null = 0x978e0c0}
cmds = 0
queueEndTime = 2359
jobs = {sh = 0x97d7fe0}
#4 0x009a0d3c in JobQueue::RunQueueProcesser (this=0x97b1398) at
jobqueue.cpp:136
No locals.
#5 0x009a0d65 in JobQueue::QueueProcesserThread (param=0x97b1398) at
jobqueue.cpp:142
jobqueue = (JobQueue *) 0x97b1398
#6 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#7 0x04694fee in clone () from /lib/tls/libc.so.6
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
Thread 5 (Thread 145763248 (LWP 21742)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x046581a6 in __nanosleep_nocancel () from /lib/tls/libc.so.6
No symbol table info available.
#2 0x04657fac in sleep () from /lib/tls/libc.so.6
No symbol table info available.
#3 0x080ba283 in HouseKeeper::RunHouseKeeping (this=0x97ad828) at
housekeeper.cpp:175
period = 0
maxhr = 0
minhr = 0
dbTag = {static null = {static null = <same as static member of
an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x988fcd0,
static shared_null = 0x978e0c0}
#4 0x080badb1 in HouseKeeper::doHouseKeepingThread (param=0x97ad828)
at housekeeper.cpp:236
hkeeper = (HouseKeeper *) 0x97ad828
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
Thread 4 (Thread 30002096 (LWP 21741)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x046581a6 in __nanosleep_nocancel () from /lib/tls/libc.so.6
No symbol table info available.
#2 0x04657fac in sleep () from /lib/tls/libc.so.6
No symbol table info available.
#3 0x080587e1 in AutoExpire::RunExpirer (this=0x97b1560) at
autoexpire.cpp:158
statbuf = {f_type = 61267, f_bsize = 4096, f_blocks = 38458713,
f_bfree = 9770161,
f_bavail = 7816557, f_files = 19546112, f_ffree = 19545921, f_fsid =
{__val = {0, 0}},
---Type <return> to continue, or q <return> to quit---
f_namelen = 255, f_frsize = 4096, f_spare = {0, 0, 0, 0, 0}}
freespace = 29
minFree = 2
recordfileprefix = {static null = {
static null = <same as static member of an already seen type>, d =
0x978e0c0,
static shared_null = 0x978e0c0}, d = 0x97b0608, static shared_null
= 0x978e0c0}
#4 0x08058ddf in AutoExpire::ExpirerThread (param=0x97b1560) at
autoexpire.cpp:200
expirer = (AutoExpire *) 0x97b1560
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
Thread 3 (Thread 109271984 (LWP 21740)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x00242cfc in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/lib/tls/libpthread.so.0
No symbol table info available.
#2 0x04d8c3ad in QWaitCondition::wait () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#3 0x080a5791 in Scheduler::RunScheduler (this=0x97ba8f8) at
scheduler.cpp:903
statuschanged = false
recIter = {_M_node = 0x98adf08}
curtime = {d = {jd = 2453512}, t = {ds = 85388929}}
secsleft = 245812
nexttv = (EncoderLink *) 0x97adc08
nextRecording = (ProgramInfo *) 0x97e33c8
nextrectime = {d = {jd = 2453515}, t = {ds = 72000000}}
startIter = {_M_node = 0x98adf08}
idleSince = {d = {jd = 0}, t = {ds = 0}}
matchTime = 0.000172
blockShutdown = true
---Type <return> to continue, or q <return> to quit---
idleTimeoutSecs = 0
idleWaitForRecordingTime = 15
fillstart = {tv_sec = 1116732600, tv_usec = 66712}
prerollseconds = 0
lastupdate = {d = {jd = 2453512}, t = {ds = 84599182}}
recordfileprefix = {static null = {
static null = <same as static member of an already seen type>, d =
0x978e0c0,
static shared_null = 0x978e0c0}, d = 0x97ad140, static shared_null
= 0x978e0c0}
firstRun = false
fillend = {tv_sec = 1116732600, tv_usec = 231807}
placeTime = 0.165095001
#4 0x080a90ed in Scheduler::SchedulerThread (param=0x97ba8f8) at
scheduler.cpp:1318
sched = (Scheduler *) 0x97ba8f8
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
No symbol table info available.
Thread 2 (Thread 66911152 (LWP 21738)):
#0 0x002fe7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1 0x046581a6 in __nanosleep_nocancel () from /lib/tls/libc.so.6
No symbol table info available.
#2 0x0468e31a in usleep () from /lib/tls/libc.so.6
No symbol table info available.
#3 0x009fad2c in TVRec::RunTV (this=0xb7ced008) at tv_rec.cpp:944
No locals.
#4 0x009faacb in TVRec::EventThread (param=0xb7ced008) at
tv_rec.cpp:919
thetv = (TVRec *) 0xb7ced008
#5 0x00240341 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6 0x04694fee in clone () from /lib/tls/libc.so.6
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
Thread 1 (Thread -1208822080 (LWP 21729)):
#0 0x04d8af4c in QMutex::lock () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#1 0x080978b8 in RefSocket::Lock (this=0x9823680) at server.h:22
No locals.
#2 0x0807555a in MainServer::customEvent (this=0x97b4c58, e=0x9814390)
at mainserver.cpp:622
pbs = (PlaybackSock *) 0x98ecea8
sock = (RefSocket *) 0x9823680
sendGlobal = false
sentSet = {<QGList> = {<> = {<No data fields>}, firstNode =
0xb7101118, lastNode = 0xb71009a0,
curNode = 0xb71009a0, curIndex = 2, numNodes = 3, iterators = 0x0},
<No data fields>}
iter = {_M_current = 0x97be040}
broadcast = {<QValueList<QString>> = {sh = 0xb7100ff0}, <No
data fields>}
sendstuff = true
#3 0x04af47be in QObject::event () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#4 0x04a98539 in QApplication::internalNotify () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#5 0x04a986ca in QApplication::notify () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#6 0x04a99696 in QApplication::sendPostedEvents () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#7 0x04a99722 in QApplication::sendPostedEvents () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#8 0x04a481c8 in QEventLoop::processEvents () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#9 0x04aadb85 in QEventLoop::enterLoop () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#10 0x04aadade in QEventLoop::exec () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#11 0x04a9773b in QApplication::exec () from
/usr/lib/qt-3.3/lib/libqt-mt.so.3
No symbol table info available.
#12 0x0806d7bf in main (argc=1, argv=0xbff75344) at main.cpp:599
a = <incomplete type>
logfile = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x97a38e8,
static shared_null = 0x978e0c0}
resched = false
nosched = false
printexpire = false
logfd = -1
port = 6543
fatal_error = false
verboseString = {static null = {static null = <same as static
member of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x97a24d0,
static shared_null = 0x978e0c0}
runsched = true
binname = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x97a3920,
static shared_null = 0x978e0c0}
daemonize = false
printsched = false
masterip = {static null = {static null = <same as static member
of an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x97ad000,
static shared_null = 0x978e0c0}
testsched = false
pidfs = <incomplete type>
statusport = 6544
myip = {static null = {static null = <same as static member of
an already seen type>,
d = 0x978e0c0, static shared_null = 0x978e0c0}, d = 0x97ace60,
static shared_null = 0x978e0c0}
ismaster = true
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