Re: filtering of commands during async operation

[Daniel Jacobowitz <drow@mvista.com>]

On Fri, Nov 07, 2003 at 11:00:20AM -0500, Newman, Mark (N-Superior Technical Resource Inc) wrote:
> 
> 
> > From: Elena Zannoni [mailto:ezannoni@redhat.com]
> .....
> > 
> >  > Next a request - Could you add "tfind", "tdump", "tstart", 
> > and "tstop"
> >  > to the list of acceptable commands?  I know that if I am using
> >  > tracepoints to monitor what is going on in a system I 
> > don't want to wait
> >  > and hope that whatever event I am monitoring for occurs.  
> > I want to be
> >  > able to look at the tracepoints while they are occurring.
> >  > 
> > 
> > 
> > It sounds like a sensible change, however I'd like to know a bit more
> > about the direction you are headed. Surely such a change would be a
> > candidate for a patch.
> > 
> 
> I am not certain what you mean by where I am headed.  My near term
> objective is to get tracepoints running in the background and to provide
> some additions that I typically put in a debugger. 
> 
> I added some support for tracepoints in gdbserver.  I then tested that
> in the foreground.  It seemed that everyone writing to the lists at the
> time was doing that. That resulted in couple (3) of bug finds that were
> fixed.
> 
> I provided a patch and a bug report (actually an enhancement - which I
> cannot find now) that allows tracepoints to run while in async mode.  I
> am now looking at running tracepoints in the background.  That resulted
> in this thread.
> 
> I am headed at getting tracepoints to the point where I can start a
> remote target running, establish tracepoints, and then go in and peek
> and poke through those tracepoints without disturbing the remote process
> (as Jim's and Michael's Heisenberg paper talked about).  I am trying to
> go a step further than their paper by allowing one to inspect the
> tracepoints while the remote is running, collecting, and hopefully not
> being perturbed.  This is something I have done in the past with some
> commercial debuggers and I am tired of doing and redoing it.

Hi Mark,

Are you planning to also contribute the gdbserver support for these
feature?  I'd love to see it added.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer