[GEM-dev] glibc pthread_join freezing on sarge using pd/pdp/gem

[IOhannes m zmoelnig]

B. Bogart wrote:
> Hi all again,
> 
> Time is running out for this machine...
> 
> After spending some time on debian-glibc it seems they are not convinced
> that it is pthread crashing on my machine, but something happening in
> the other threads.

just to make sure: do other threaded objects work (like [readsf~] ?)

> 
> So lets get to the tracing...
> 
> after I manually kill PD this is what I'm seeing in gdb:
> 
> Program received signal SIGTERM, Terminated.
> [Switching to Thread 1076308992 (LWP 9384)]
> 0xffffe410 in __kernel_vsyscall ()
> (gdb)
> (gdb) bt
> #0  0xffffe410 in __kernel_vsyscall ()
> #1  0x4012f288 in pthread_join () from /lib/tls/i686/cmov/libpthread.so.0


i see you are using libc6-i686
could you try deinstalling it ?

> 
> What I'm confused about it how this libc differs from /lib/libc.so.6:

yours should be optimized for i686, while the normal lib6 is just generic.

> 
> So why is /lib/tls/i686/cmov/libc.so.6 used and not /lib/libc.so.6 ?

i guess that /etc/ld.so.conf is overriding /lib/ (but my guess might be 
pretty nonsense; anyhow it should be something like that)



what i would do (if the above doesn't help) is to add post()s in the 
videoV4L.cpp code and random/strategic positions to see what it is doing 
(e.g. whether it is really hanging at pthread_join())



another solution would be to make the use of threads optional (if 
pthreads are the problem) but this would make video really not smooth


mfg.a.frew
IOhannes