Re: thread debugging problem

[Daniel Jacobowitz <drow@mvista.com>]

On Fri, Sep 12, 2003 at 09:15:01AM +0200, Andreas Westin wrote:
> >  > Hi,
> >  > 
> >  > I'm trying to debug a multithreaded program in linux, but I'm not
> > able 
> >  > to get any kind of thread info while running the program in gdb.
> >  > I've tested with gdb 5.3, 5.3.91 and cvs from yesterday (10th) not
> > any 
> >  > of them works.
> >  > info thread shows nothing and the program stops with signal 32 when a
> > 
> >  > new thread starts.
> >  > 
> > 
> > Hmmm, this usually indicates that there is no thread support
> > available.  Maybe the version of the Kernel you are using has some
> > missing pieces. How about glibc-kernheaders?
> > 
> > Do you get a message at gdb startu saying something about using
> > libthread_db?
> > 
> >  > I'm using Trustix 2.0 with gcc 3.3 and glibc 2.3.2.
> >  > 
> > 
> > Not sure what Trustix is.
> > But those versions seem roughly ok.
> > 
> > Can you post a gdb session?
> > 
> 
> This is the kernel installed.
> root@labb ~# uname -a
> Linux labb.mobilecity.nu 2.4.21-13trfirewall #1 Thu Jul 10 15:57:32 CEST 2003 
> i686 unknown unknown GNU/Linux
> 
> I have installed the glibc-devel rpms so the headers should be included.
> 
> Trustix is small firewall/gateway dist, http://www.trustix.net/
> 
> A sample gdb session, I do not see any message about libthread_db though.

Does trustix even ship /lib/libthread_db.so.1?  If not, thread
debugging won't work.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer