Sender:	rich AT phekda DOT freeserve DOT co DOT uk
Message-ID:	<3D3A740A.55604E14@phekda.freeserve.co.uk>
Date:	Sun, 21 Jul 2002 09:42:50 +0100
From:	Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
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To:	djgpp-workers AT delorie DOT com
Subject:	Re: Emacs CVS and Windows NT 4
References:	<10207201605 DOT AA21517 AT clio DOT rice DOT edu>
Reply-To:	djgpp-workers AT delorie DOT com

Hello.

Charles Sandmann wrote:
> 
> > As I've said in another mail, it was crashing on a cli instruction in
> > brk_common.
> 
> Which was the fix which worked for me under Windows 2000 on a small
> test program.  Didn't have time to test on NT4.
> 
> > I discovered that I wasn't running a "pure" copy of CVS. So I've
> > reverted the changes to src/libc/crt0 and rebuilt.
> 
> What changes were those?
 
It was your cli fix. So for my first mail about debugging Emacs, the cli fix
was in place. But I wanted to know how "pure" CVS crashed, so I removed the
cli fix.

[snip]
> > It seems to be sensitive to how much keyboard activity there is. I haven't
> > worked out the relation between keypresses and crashes yet.
> 
> Right - it needs to be a hardware interrupt, and happen between the time
> we resize/move the memory area and the selector is updated with the new
> memory base.
> 
> Try the program I provided in email dated 19 May 2002 15:36 - small and
> easy to debug.  The upstroke keyboard interrupt is very easy to cause an
> interrupt in the sbrk and cause a crash.
[snip]

It seems to crash in the same way with and without the cli fix. I tried:

    <program name> 100 500 1000 10000 100

and it crashed every time after five key presses irrespective of how fast I
press the keys.

Bye, Rich =]

-- 
Richard Dawe [ http://www.phekda.freeserve.co.uk/richdawe/ ]

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