Stuck CLOSED sockets / sshd / zombies...
John Baldwin
jhb at freebsd.org
Tue Apr 8 16:20:11 UTC 2014
On Tuesday, April 08, 2014 11:33:03 am Karl Pielorz wrote:
>
> --On 08 April 2014 09:36 -0400 John Baldwin <jhb at freebsd.org> wrote:
>
> > Humm, it needs to build new ones with debug symbols. If it doesn't,
> > you'll need to do 'make clean' before the other makes. I think you
> > should be fine to do that (make clean then the command above) for those
> > directories and restart gdb without having to restart your sshd. Please
> > also add '/usr/src/libexec/rtld-elf' to the list of directories where you
> > do this. Then do 'detach' in gdb, exit gdb and restart it.
>
> Ok, it hit an issue with libc (complained it couldn't find yp.h - but I
> fixed that) and it compiled up OK then. The rest all recompiled / installed
> OK, and I included the rtld-elf code.
>
> > Hmmm, that is useful even though the debug symbols aren't there. Please
> > do the rebuilds I asked for above and re-attach gdb and get 'bt' again.
>
> Ok, that now nets:
>
> "
> ...
> [Switching to LWP 100218]
> 0x00000008038ea89c in __error () from /lib/libthr.so.3
> (gdb) bt
> #0 0x00000008038ea89c in __error () from /lib/libthr.so.3
> #1 0x00000008038e104f in __thr_rwlock_rdlock (rwlock=0x803af9480,
> flags=<value optimized out>, tsp=<value optimized out>)
> at /usr/src/lib/libthr/thread/thr_umtx.c:277
> #2 0x00000008038e821c in _thr_rtld_rlock_acquire (lock=0x803af9480) at
> atomic.h:143
> #3 0x000000080064f9a2 in rlock_acquire (lock=0x80085fe00,
> lockstate=0x7fffffffba68) at /usr/src/libexec/rtld-elf/rtld_lock.c:197
> #4 0x00000008006498c9 in _rtld_bind (obj=0x800662000, reloff=13008) at
> /usr/src/libexec/rtld-elf/rtld.c:675
> #5 0x00000008006470cd in _rtld_bind_start () at
> /usr/src/libexec/rtld-elf/amd64/rtld_start.S:99
> #6 0x0000000000000246 in ?? ()
> #7 0x0000000000000000 in ?? ()
> "
Can you do 'frame 3' and ' p *lock' as well as 'frame 1' and 'p *rwlock'?
--
John Baldwin
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