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Date: Fri, 23 May 2003 10:30:18 -0400 (EDT)
From: John Baldwin <jhb@FreeBSD.org>
To: Jun Kuriyama <kuriyama@imgsrc.co.jp>
cc: Current <freebsd-current@FreeBSD.org>
Subject: Re: Panic in _mtx_lock_flags+0x40
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On 23-May-2003 Jun Kuriyama wrote:
> At Thu, 22 May 2003 16:35:33 +0000 (UTC),
> John Baldwin wrote:
>> The real bug is probably here, probably a NULL pointer dereference.
>> I would use gdb to figure out what this file:line is and send the
>> report to Søren.
> 
> Unfortunatelly, I cannot dump a core of my kernel for there months.
> I'm using dumpdev="/dev/ad4s1b", but my box will freeze after
> resetting ata2 (ad4) bus.  I don't know where the problem is...

You don't need a dump, just do this:

% gdb -k kernel.debug
gdb> l *functoin+0xYYYYY

and you will get the file and line matching that frame in the DDB
trace.

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/