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Date:      Thu, 31 May 2012 11:28:00 -0400
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-current@freebsd.org
Cc:        Sergey Dyatko <sergey.dyatko@gmail.com>
Subject:   Re: ctfmerge core dump
Message-ID:  <201205311128.00955.jhb@freebsd.org>
In-Reply-To: <CAJ0WZYCd5Mmen1jDwwa-p=H7nLFoCMaob9C-2aj7idkJVJhUZA@mail.gmail.com>
References:  <CAGFTUwOX1bM1i1a6e1c3AgpV0KCfbc7gbvkdRLq4MwdZ6QnY9A@mail.gmail.com> <d5d975e08424161e16b594f521b73c1d.squirrel@mouf.net> <CAJ0WZYCd5Mmen1jDwwa-p=H7nLFoCMaob9C-2aj7idkJVJhUZA@mail.gmail.com>

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On Thursday, May 24, 2012 4:10:59 pm Sergey Dyatko wrote:
> 2012/5/7 Steve Wills <swills@freebsd.org>
> 
> > > On 2012/5/6 5:08, b. f. wrote:
> > >> On 5/5/12, Steve Wills<swills@freebsd.org>  wrote:
> > >>> Thanks for the info. I took a look at the dump and see this:
> > >>>
> > >>> % sudo gdb /usr/bin/ctfmerge ctfmerge.core
> > >>> [GDB will not be able to debug user-mode threads: Undefined symbol
> > >>> "td_thr_getxmmregs"]
> > >
> > > Hmm, is the thread debugging broken on amd64 now ?  td_thr_getxmmregs
> > > resides
> > > in libthread_db and /usr/src/gnu/usr.bin/gdb/libgdb is complaining about
> > > the missing
> > > symbol.
> > >
> >
> > Maybe or maybe I have done something wrong on my system. FWIW, I do all my
> > builds with debugging enabled.
> >
> > BTW, just to confirm, I was able to work around the original issue once I
> > updated past r235068. I had to disable DTrace build and build and install
> > a new libthr, then was able to re-enable DTrace and everything was fine.
> >
> > Thanks,
> > Steve
> >
> >
> >
> hm.. looks like problem is still here. I'm trying update my r234992 to
> r235887
> http://pastebin.com/stm7b8hQ

I believe this was fixed by 235563 in HEAD.

-- 
John Baldwin



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