Date: Sat, 30 May 1998 22:21:00 -0700 From: Amancio Hasty <hasty@rah.star-gate.com> To: John Birrell <jb@cimlogic.com.au> Cc: current@FreeBSD.ORG Subject: Re: pthreads and thread-specific? Message-ID: <199805310521.WAA19570@rah.star-gate.com> In-Reply-To: Your message of "Sun, 31 May 1998 15:09:57 %2B1000." <199805310509.PAA13433@cimlogic.com.au>
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{hasty} ldd Barrier_Test
Barrier_Test:
libACE.so => /usr/lib/libACE.so (0x28052000)
libc_r.so.3 => /usr/lib/libc_r.so.3 (0x2815b000)
libstdc++.so.2 => /usr/lib/libstdc++.so.2 (0x281e3000)
libg++.so.4 => /usr/lib/libg++.so.4 (0x2821a000)
libm.so.2 => /usr/lib/libm.so.2 (0x28257000)
libc.so.3 => /usr/lib/libc.so.3 (0x28271000)
libc_r.so.3 => /usr/lib/libc_r.so.3 (0x2815b000)
libstdc++.so.2 => /usr/lib/libstdc++.so.2 (0x281e3000)
libg++.so.4 => /usr/lib/libg++.so.4 (0x2821a000)
libm.so.2 => /usr/lib/libm.so.2 (0x28257000)
Looks like I am pulling the right libraries. I will browse at the
code a little bit more.
Tnks,
amancio
> Amancio Hasty wrote:
> > Hi John,
> >
> > It looks like the threads are waiting on a dead thread...
> >
> > I stuck this in uthread_info:
> [...]
>
> I don't think you needed the outer loop. Chuckle.
>
> > for (itr = 0; itr < PTHREAD_DESTRUCTOR_ITERATIONS; itr++) {
> [...]
> >
> > DEAD THREADS
> >
> > Thread 0x8050800 prio 64 [/usr/src/lib/libc_r/uthread/uthread_exit.c:176]
>
> Hmmm, so Elvis really isn't dead. He's just deadlocked waiting on a
> spinlock. 8-)
>
> For the thread to be dead, it must have completed the cleanup. There is
> only one place where it sets it's state to PS_DEAD and that is after all
> exit processing has been completed and it has removed itself from the
> list of active threads. As far as I can see, the _spinlock/_atomic_unlock
> calls are correctly paired in src/lib/libc_r/uthread/uthread_spec.c,
> so it looks like the _atomic_unlock call hasn't done it's job. Is the
> _atomic_unlock linked into the process from libc_r, or has another
> function of the same name been linked in first? You are linking with
> gcc -pthread on a -current system, aren't you?
>
> --
> John Birrell - jb@cimlogic.com.au; jb@freebsd.org http://www.cimlogic.com.au/
> CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137
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