Re: rt/tst-aio7 weirdness on ppc

[Daniel Jacobowitz <drow at mvista dot com>]

On Sun, Sep 29, 2002 at 10:18:59PM -0700, Roland McGrath wrote:
> > Roland,
> >     Well if I go into powerpc-linux/obj/rt and do...
> > 
> > ../testrun.sh ./tst-aio7 &
> > 
> > I immediately see...
> > 
> >  0 1 2 3 4 5 6 7 
> > 
> > however the prompt never returns unless I hit a carriage return.
> > which produces this output and a prompt
> > 
> > [1]+  Stopped                 ../testrun.sh ./tst-aio7
> > 
> > Perhaps that is what you were seeing?
> 
> Looks like it.  Use jobs -l to see that actual signal, which was SIGTTIN
> for me.  (I don't know when shells started printing "Stopped" for all stop
> signals instead of the signal text, but it's damned annoying.)
> 
> When I tried to attach gdb to the stopped process, the gdb got wedged.  So
> I have no idea where this process was stopped.  There is no reason it
> should do anything that could provoke a SIGTTIN.  If you have any more luck
> in ascertaining any details about what is happening than I did earlier,
> please post any information you uncover.

When this happens you want to do the attach, then manually send a
SIGCONT to the process GDB is attaching to; then it should successfully
attach and stop immediately.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer