Date: Tue, 08 Apr 2014 16:33:03 +0100 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Stuck CLOSED sockets / sshd / zombies... Message-ID: <63EFBCBD259A410BB4D71742@Mail-PC.tdx.co.uk> In-Reply-To: <201404080936.30651.jhb@freebsd.org> References: <3FE645E9723756F22EF901AE@Mail-PC.tdx.co.uk> <201404071148.10157.jhb@freebsd.org> <9647C5438B5CD4A3058AB1A2@Mail-PC.tdx.co.uk> <201404080936.30651.jhb@freebsd.org>
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--On 08 April 2014 09:36 -0400 John Baldwin <jhb@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 ?? ()
"
-Karl
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