Sender:	rich AT phekda DOT freeserve DOT co DOT uk
Message-ID:	<3D0913C9.5419EBCE@phekda.freeserve.co.uk>
Date:	Thu, 13 Jun 2002 22:51:05 +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: unixy sbrk and win2k
References:	<10206121508 DOT AA22074 AT clio DOT rice DOT edu>
Reply-To:	djgpp-workers AT delorie DOT com

Hello.

Charles Sandmann wrote:
[snip]
> Do this (important test).  Launch cmd.exe.  If you launch the task manager,
> sort by image name, check the number of NTVDM.EXE images.  Run emacs,
> you should see a new NTVDM.  Record it's PID.  Do the CTRL thing, does it's
> PID go away when it exits?  The cmd window will remain.  Do you get any
> other info, or just dropped back to command line (when NTVDM aborts you
> typically just go back to the prompt with no message).
> 
> This test determines if it happens without nesting (important fact), if
> there is any crash info (important fact), if NTVDM dies (important).
> Does it go away if you are not using unixy sbrk?
> 
> If it happens standalone, and NTVDM dies, then it indicates something
> in the hardware interrupt routine isn't quite right.

Here's my testing method: Start up Emacs, holding down Ctrl. Then go to the
scratch buffer, select the text, copy and paste it lots of times (Ctrl+Y),
move around a bit using the cursors (pressing Ctrl fairly often to skip
words), try transposing a bit (Ctrl+T).

Here are the results with Emacs CVS built against DJGPP 2.03 refresh++
pre-release:

Emacs run from cmd.exe does not crash on start-up, when I hold down Ctrl. I
does bomb out after pressing Ctrl 20-30 times, say (maybe more, maybe less).
NTVDM disappears from the Task Manager. I don't get a traceback.

Emacs run directly from a shortcut seems pretty stable. I spent a couple
minutes doing operations involving Ctrl and it did not crash.

This is all with Unixy sbrk. If I disable Unixy sbrk, then Emacs works fine.

So, is this a nesting problem? What else can I do to help diagnose the
problem?

Bye, Rich =]

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

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