Date: Wed, 5 Mar 2008 03:20:03 GMT From: David Xu <davidxu@FreeBSD.org> To: freebsd-threads@FreeBSD.org Subject: Re: threads/121343: pthread_cond_wait hanging in libthr Message-ID: <200803050320.m253K3vP020870@freefall.freebsd.org>
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The following reply was made to PR threads/121343; it has been noted by GNATS. From: David Xu <davidxu@FreeBSD.org> To: josh.carroll@gmail.com Cc: freebsd-gnats-submit@FreeBSD.org Subject: Re: threads/121343: pthread_cond_wait hanging in libthr Date: Wed, 05 Mar 2008 11:14:56 +0800 Josh Carroll wrote: >> This should not happen, I am not sure if there is memory problem in the >> program. >> >> Regards, >> David Xu >> > > Here is what I see when gdb first starts, libthr/error emphasized by > inserting blank lines around those parts of the gdb output: > > Attaching to program: /usr/local/bin/ushare, process 68900 > Reading symbols from /usr/local/lib/libupnp.so.3...done. > Loaded symbols for /usr/local/lib/libupnp.so.3 > Reading symbols from /usr/local/lib/libthreadutil.so.4...done. > Loaded symbols for /usr/local/lib/libthreadutil.so.4 > Reading symbols from /usr/local/lib/libixml.so.2...done. > Loaded symbols for /usr/local/lib/libixml.so.2 > Reading symbols from /lib/libc.so.7...done. > Loaded symbols for /lib/libc.so.7 > > Reading symbols from /lib/libthr.so.3...done. > [New Thread 0x40e01290 (LWP 100363)] > Error while reading shared library symbols: > Cannot get thread info: invalid key > > Reading symbols from /usr/lib/liblwres.so.30...done. > Loaded symbols for /usr/lib/liblwres.so.30 > Reading symbols from /libexec/ld-elf.so.1...done. > Loaded symbols for /libexec/ld-elf.so.1 > 0x00000000409d08da in _umtx_op () from /lib/libc.so.7 > > Perhaps I need to rebuild libthr? > > Josh > I don't know what really happened, but if your program is using threads, it is better to link it with thread library directly. Can you dump ldd result ? ldd /usr/local/bin/ushare I have ushare up and running: apple# ps xaHl | grep ushare 0 5235 1 0 8 0 5560 1768 nanslp Ss ?? 0:00.01 /usr/local/bin/ushare --daemon 0 5235 1 0 60 0 5560 1768 ucond Ss ?? 0:00.00 /usr/local/bin/ushare --daemon 0 5235 1 0 47 0 5560 1768 ucond Ss ?? 0:00.00 /usr/local/bin/ushare --daemon 0 5235 1 0 47 0 5560 1768 ucond Ss ?? 0:00.00 /usr/local/bin/ushare --daemon 0 5235 1 0 61 0 5560 1768 select Ss ?? 0:00.00 /usr/local/bin/ushare --daemon 0 5235 1 0 48 0 5560 1768 ucond Ss ?? 0:00.00 /usr/local/bin/ushare --daemon 0 5235 1 0 55 0 5560 1768 ucond Ss ?? 0:00.00 /usr/local/bin/ushare --daemon apple# sockstat -4l USER COMMAND PID FD PROTO LOCAL ADDRESS FOREIGN ADDRESS root ushare 5235 4 tcp4 *:49152 *:* root ushare 5235 5 udp4 127.0.0.1:62809 *:* root ushare 5235 6 udp4 *:* *:* root ushare 5235 7 udp4 *:1900 *:* ... Regards, David Xu
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