From owner-freebsd-hackers  Thu Jun 27 12:45:47 1996
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.5/8.7.3) id MAA19473
          for hackers-outgoing; Thu, 27 Jun 1996 12:45:47 -0700 (PDT)
Received: from relay-4.mail.demon.net (relay-4.mail.demon.net [158.152.1.108])
          by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id MAA19456
          for <hackers@freebsd.org>; Thu, 27 Jun 1996 12:45:33 -0700 (PDT)
Received: from post.demon.co.uk ([158.152.1.72]) by relay-4.mail.demon.net
          id ae26974; 27 Jun 96 19:28 GMT
Received: from jraynard.demon.co.uk ([158.152.42.77]) by relay-3.mail.demon.net
          id aa26994; 27 Jun 96 18:09 +0100
Received: (from fhackers@localhost) by jraynard.demon.co.uk (8.6.12/8.6.12) id JAA00671; Thu, 27 Jun 1996 09:49:26 GMT
Date: Thu, 27 Jun 1996 09:49:26 GMT
Message-Id: <199606270949.JAA00671@jraynard.demon.co.uk>
From: James Raynard <fhackers@jraynard.demon.co.uk>
To: alk@think.com
CC: jkh@time.cdrom.com, hackers@freebsd.org
In-reply-to: <199606270638.BAA00387@compound.Think.COM> (message from Tony
	Kimball on Thu, 27 Jun 1996 01:38:17 -0500 (CDT))
Subject: Re: longstanding, woeful inadeqacy
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

> : Fork is an easier case since you don't need to swap the debugger's
> : executable out - just attach to the new process.
> 
> Easier in what sense?  It is essentially impossible to debug anything
> that forks, since by the time you can attach to it, it has gone
> veering wildly out of control.

Not if you put a sleep loop in it:-

int PauseMode = 1;

if (fork())	/* parent */
	....
else {		/* child */
	while (PauseMode)
		sleep(5);
	...
}

and then set PauseMode to 0 when you attach.

-- 
James Raynard, Edinburgh, Scotland
james@jraynard.demon.co.uk