Subject: Re: Autosave of panic backtraces (was Re: Getting into the debugger)
To: Brian C. Grayson <firstname.lastname@example.org>
From: Chris G. Demetriou <email@example.com>
Date: 01/17/1999 00:31:40
"Brian C. Grayson" <firstname.lastname@example.org> writes:
> Maybe it's just me/pilot-error, but crashdumps just haven't
> gotten along with me:
> 1. savecore sometimes says "/dev/wd0e busy" even when dumpdev
> is wd0b and /var/crash is wd0f.
i've seen that when the kernel being booted wasn't /netbsd...
> 2. savecore sometimes prints some message about a completely
> bogus device number and gives up.
> 4. When I invoke "gdb netbsd.gdb" and use "target kcore
> netbsd.5.core", I couldn't get a backtrace (because it
> thought the IP was 0???). I tried using
> "proc curproc", but that failed trying to access 0x0
> (invalid PDE). Is there some crucial step I'm missing? This
> happened on more than one crashdump, and I still have some
> of them lying around in /var/crash, so hints could help
> me send better info to Bill S.
i dunnot what the deal is with this, but, in my opinion:
if the way to get a trace of the thing that cause the kernel to die
isn't the default when you get a backtrace, or how to get it isn't
painfully obvious and way over-documented, that's a bug. please file
a PR. 8-)
Chris Demetriou - email@example.com - http://www.netbsd.org/People/Pages/cgd.html
Disclaimer: Not speaking for NetBSD, just expressing my own opinion.