Re: [Opalvoip-devel] Procyon crash

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It really cured my case too. Many thanks.

On 23.04.2016 16:13, Robert Jongbloed wrote:
> RE: [Opalvoip-devel] Procyon crash
> Thank you, I have applied this patch to the stable code.
>
> ----------
> *Robert Jongbloed*
> /Vox Lucida Pty. Ltd./
>
>     -----Original message-----
>     *From:* Harald Karner
>     *Sent:* Thursday, 21st April 2016, 7:40
>     *To:* Alexander Sbitnev; opa...@li...
>     *Subject:* Re: [Opalvoip-devel] Procyon crash
>
>     Hello Alexander!
>
>     I encountered a similar problem recently. But in my case it the crash
>     occurred in every call. It turned out it was caused by the H.281/FECC
>     rtp stream, since H.281/FECC has no regular RTP frames, m_frameTime is
>     initialized with a value of 0.
>     Adding a  "if (m_frameTime != 0) " for
>     "timestamp += ((20*GetMediaFormat().GetTimeUnits() + m_frameTime -
>     1)/m_frameTime) * m_frameTime;"
>     did the trick for me (see attached patch).
>     And looking at your trace log, one of the last things happening there is
>     the opening of the FECC channel...
>
>     Regards
>     Harald
>
>     On 20.04.2016 15:06, Alexander Sbitnev wrote:
>     >    Got myself a crash with Procyon console sample during call initiating
>     > with Polycom RealPresence Group 700.
>     >    Some times call initiated without problem. Sometimes it crashing with
>     > divide by null operation (SIGFPE).
>     > By some strange coincidence I was able to get crash dump without
>     > building debug version. Normally without debug build little info can be
>     > salvaged, but this time normal build debugging as a debug one. But still
>     > I've rebuild with debug and re-examine situation.
>     > Here is my preliminary findings on the matter of crash.
>     > Coredump I've got:
>     >
>     > Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
>     > Core was generated by `obj_linux_x86_64_d/conopal --no-sip --no-fast
>     > --video-size 1280x720 --grabber-d'.
>     > Program terminated with signal SIGFPE, Arithmetic exception.
>     > #0  0x00007f5f9abab924 in OpalRTPMediaStream::ReadPacket
>     > (this=0x7f5f684f8e10, packet=...) at
>     > /home/shuras/Procyon/opal-3.16.1/src/rtp/rtp_stream.cxx:324
>     > 324          timestamp += ((20*GetMediaFormat().GetTimeUnits() +
>     > m_frameTime - 1)/m_frameTime) * m_frameTime;
>     > [Current thread is 1 (Thread 0x7f5f8a9d4700 (LWP 11457))]
>     > (gdb) bt
>     > #0  0x00007f5f9abab924 in OpalRTPMediaStream::ReadPacket
>     > (this=0x7f5f684f8e10, packet=...) at
>     > /home/shuras/Procyon/opal-3.16.1/src/rtp/rtp_stream.cxx:324
>     > #1  0x00007f5f9ab72944 in OpalMediaPatch::Main (this=0x7f5f684d65e0) at
>     > /home/shuras/Procyon/opal-3.16.1/src/opal/patch.cxx:780
>     > #2  0x00007f5f9ab79bf1 in PThreadObj<OpalMediaPatch>::Main
>     > (this=0x7f5f6808a730) at /usr/local/include/ptlib/thread.h:737
>     > #3  0x00007f5f99f2a5fc in PThread::PX_ThreadMain (arg=0x7f5f6808a730) at
>     > /home/shuras/Procyon/ptlib-2.16.1/src/ptlib/unix/tlibthrd.cxx:348
>     > #4  0x00007f5f9719b6aa in start_thread (arg=0x7f5f8a9d4700) at
>     > pthread_create.c:333
>     > #5  0x00007f5f9941ce9d in clone () at
>     > ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
>     > (gdb) print m_frameTime
>     > $1 = 0
>     >
>     > Log file attached.
>     > I didn't find anything suspicious in the log yet. I suppose it must be
>     > some race condition.
>     >
>     >
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