glibc pthread_join freezing on sarge

From: B. Bogart (ben_at_ekran.org)
Date: 08/31/05

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    Date: Tue, 30 Aug 2005 23:14:11 -0400
To: debian-user-digest@lists.debian.org

    Hello all,

    I'm running a stock sarge machine with the 32bit 2.6.8 kernel on a AMD64
    3200+ machine. I'm using some unstable and demudi packages.

    Problem I'm having is that a few apps (actually almost all my v4l apps)
    crash when I try and capture video. Actually there is no fault, but the
    software hangs. I traced it down to the use of pthread_join() which is
    where the code hangs. (I've been doing a backtrace after manually
    killing the application)

    I tried upgrading my libc6 to 2.3.2.ds1-22.d still getting the same
    crash. Here are a couple examples of traces:

    (gdb) bt
    #0 0xffffe410 in __kernel_vsyscall ()
    #1 0x40128f18 in pthread_join () from /lib/tls/i686/cmov/libpthread.so.0
    #2 0x44bd97bd in videoV4L::stopTransfer () from
    /usr/lib/pd/extra/Gem.pd_linux
    #3 0x44bd504c in pix_videoNEW::stopRendering ()
        from /usr/lib/pd/extra/Gem.pd_linux
    #4 0x44b0111e in GemBase::gem_startstopMess ()
        from /usr/lib/pd/extra/Gem.pd_linux
    #5 0x44b01382 in GemBase::gem_MessCallback ()
        from /usr/lib/pd/extra/Gem.pd_linux
    #6 0x0809ba47 in pd_typedmess ()
    #7 0x00000000 in ?? ()

    (gdb) bt
    #0 0xffffe410 in __kernel_vsyscall ()
    #1 0x40128f18 in pthread_join () from /lib/tls/i686/cmov/libpthread.so.0
    #2 0x42a86440 in pdp_sdl_setup () from /usr/lib/pd/extra/pdp.pd_linux

    So what should I do to try and solve this? What version of libc6 should
    I be using? Are there known bugs with my configuration and pthreads?

    I'm dependant on getting this machine working, so I hope someone has a
    suggestion. I'd be happy to do whatever tests to break the issue down
    further.

    Thanks all.

    B. 

    


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