From owner-freebsd-hackers  Fri Feb 23 16:35:57 1996
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To: "Kaleb S. KEITHLEY" <kaleb@x.org>
cc: hackers@freefall.FreeBSD.org
Subject: Re: Whither ddb 
In-reply-to: Your message of "Fri, 23 Feb 1996 19:21:56 EDT."
             <199602240021.AAA00739@exalt.x.org> 
From: David Greenman <davidg@Root.COM>
Reply-To: davidg@Root.COM
Date: Fri, 23 Feb 1996 16:35:58 -0800
Sender: owner-hackers@FreeBSD.ORG
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>Color me ignorant. I've jumped into kernel hacking on my 2.1R system 
>with both feet and but now I've run into a roadblock.
>
>`man -k debug` hints at ddb. `man ddb` says it's a better replacement for 
>kdb. I've built ddb support into my kernel? Is there supposed to be a
>separate ddb program? If so there's no such beast on my system. A cursory 
>look at FreeBSD-stable on WC didn't reveal sources for a separate ddb 
>program either. The ddb man page says a lot about how to use ddb once 
>running but???
>
>What exactly is the strategy for debugging a kernel?

   Either use the debugger escape sequence (ctrl-alt-esc or ctrl-printscrn),
or wait for the system to panic - it will drop into the debugger at that time.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project