----- Original Message -----
From: "John Baldwin" <j...@freebsd.org>
For the hang it seems you have a thread waiting in a blocking read(), a thread
waiting in a blocking accept(), and lots of threads creating condition
variables. However, the pthread_cond_init() in libpthread (libthr on FreeBSD)
doesn't call pthread_cleanup_push(), so your stack trace doesn't make sense to
me. However, that may be gdb getting confused. The pthread_cleanup_push()
frame may be cond_init(). However, it doesn't call umtx_op() (the
_thr_umutex_init() call it makes just initializes the structure, it doesn't
make a _umtx_op() system call). You might try posting on threads@ to try to
get more info on this, but your pthread_cond_init() stack traces don't really
make sense. Can you rebuild libc and libthr with debug symbols?
For example:
# cd /usr/src/lib/libc
# make clean
# make DEBUG_FLAGS=-g
# make DEBUG_FLAGS=-g install
However, if you are hanging in read(), that usually means you have a socket
that just doesn't have data. That might be an application bug of some sort.
The segv trace doesn't include the first part of GDB messages which show which
thread actually had a seg fault. It looks like it was the thread that was
throwing an exception. However, nanosleep() doesn't throw exceptions, so that
stack trace doesn't really make sense either. Perhaps that stack is hosed by
the exception handling code?
I've uploaded a two more traces for the oxt test failure / segv.
http://code.google.com/p/phusion-passenger/issues/detail?id=441#c1
From looking at the test case it testing the capture of failures and its ability
to create a stack trace output so that may give others some indication where
the issue may be?
I will look to do the same on for the hang issue but that's on a live site so
will need to schedule some downtime before I can get those rebuilt and then
wait for it to hang again, which could be quite some time :(
Regards
Steve
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