Stuck CLOSED sockets / sshd / zombies...

[Karl Pielorz]

--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 ?? ()
"

-Karl