Re: [RFA/testsuite] Workaround timeout in default.exp

[Daniel Jacobowitz <drow@false.org>]

On Wed, May 19, 2004 at 06:48:11PM -0700, Joel Brobecker wrote:
> > > 2004-05-18  J. Brobecker  <brobecker@gnat.com>
> > > 
> > > 	* gdb.base/default.exp: Rewrite a couple of tests to work-around
> > > 	a problem that causes this test and all the following tests to
> > > 	timeout.
> > > 
> > > Tested on AIX 5.1 and x86-linux. Would that be OK to apply?
> > 
> > Rather than adding a FIXME, let me try to explain what is going on.
> 
> OK.
> 
> > The first part is a guess.  For some reason, the pattern "\(gdb\) $"
> > never matches on GNU/Linux but does on AIX and Solaris.  I presume this
> > is because of some difference in the pseudo-TTY layer or in the
> > standard I/O library, which causes characters to be send in smaller
> > batches.  So at some point on those systems, the buffer ends with the
> > prompt.
> 
> There may be a crack in your theory, because there something it doesn't
> explain. When I use the simple send_gdb/gdb_expect sequence, then I get
> the whole output, ie the differences you are mentioning do not come into
> play. I verified this by using expect_out.
> 
> I tried your suggestion, without much luck so far. Here is what I have
> tried:

If you're trying to debug expect matching, I recommend "exp_internal 1"
before the block (and maybe "exp_internal 0" after).  That will let you
see exactly what's going on, and why my crackpot theory is wrong :)

-- 
Daniel Jacobowitz