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Date: Mon, 11 Apr 2005 09:51:46 -0700
From: Sam Leffler <sam@errno.com>
Organization: Errno Consulting
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To: Pawel Jakub Dawidek <pjd@freebsd.org>
References: <20050411085956.Y28571@mail.chesapeake.net>
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cc: Jeff Roberson <jroberson@chesapeake.net>
cc: hackers@freebsd.org
Subject: Re: JKH Task: Stack saving/tracing functionality.
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Pawel Jakub Dawidek wrote:
> On Mon, Apr 11, 2005 at 09:08:33AM -0400, Jeff Roberson wrote:
> +> I have proprietary code from a previous employer of mine that implements
> +> some really useful debugging features.  I'm looking for someone who is
> +> interested in cleaning it up, making it architecture indepenent, and
> +> getting it running on current.  The code basically allows you to save and
> +> manipulate stack information.
> +> 
> +> This would be very useful for things like lockmgr, which right now we
> +> can't really pass file:line information down to without making #ifdef mess
> +> of all of the APIs as options DEBUG_LOCKs does somewhat today.  Lockmgr
> +> would have a buffer which contained the last N EIPs up the callstack, and
> +> this information could be queried and printed using a simple api.
> +> 
> +> Interested parties please email me.  We can discuss this and I can provide
> +> source.
> 
> It would be probably useful for wintess, so when first order is stored,
> it can be stored with stack and on LOR, both backtraces can be shown.
> 

There is a similar #ifdef mess in net80211 for refcnt debugging.

	Sam