Date: Sun, 3 Aug 2003 09:37:27 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Eivind Olsen <eivind@aminor.no> Cc: current@freebsd.org Subject: Re: Yet another crash in FreeBSD 5.1 Message-ID: <20030803000727.GG95375@wantadilla.lemis.com> In-Reply-To: <1886375.1059842833@[192.168.0.2]> References: <1079.192.168.0.3.1059811884.squirrel@webmail.aminor.no> <3F2B803C.21D38E0B@mindspring.com> <1886375.1059842833@[192.168.0.2]>
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--xjyYRNSh/RebjC6o Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Saturday, 2 August 2003 at 16:47:13 +0200, Eivind Olsen wrote: > --On 2. august 2003 02:11 -0700 Terry Lambert <tlambert2@mindspring.com> > wrote: >>> db> trace >>> g_dev_strategy(c2156024,c2153800,0,cfb528d0,c2099eca) at >>> g_dev_strategy+0x29 launch_requests(c299bf00,0,10000,ffffffff,47) at >>> launch_requests+0x448 vinumstart(c5ada2d0,0,c22ab000,cfb5294c,c02e5bc6) >>> at vinumstart+0x2b2 >> gdb -k kernel.debug >> (gdb) list *(g_dev_strategy+29) >> [ ... ] >> (gdb) list *(launch_requests+448) >> [ ... ] >> (gdb) list *(vinumstart+2b2) >> [ ... ] >> Will give you the exact source lines involved, assuming you >> built a debug kernel. > > I did. At least I've tried to. :) > (I have a kernel.debug which was compiled at the same time as the real > kernel I'm using, and it's approx. 30MB in size). > >> You don't actually need a crash dump to debug a stack traceback. > > This is what I found by using those commands you mentioned: > > eivind@vimes:~/tmp/debug > gdb -k kernel.debug > GNU gdb 5.2.1 (FreeBSD) > Copyright 2002 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you = are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for detail= s. > This GDB was configured as "i386-undermydesk-freebsd"... > (kgdb) list *(g_dev_strategy+29) This is almost certainly the wrong function. At the very list you should look at the arguments passed to it. > (kgdb) list *(launch_requests+448) > No symbol "launch_requests" in current context. > (kgdb) list *(vinumstart+2b2) > No symbol "vinumstart" in current context. > (kgdb) Read the links I just sent you. You haven't loaded the Vinum symbols. > If anyone wants to take a look at this themselves I've put the compressed > (gzip) debug-kernel available on > http://eivind.aminor.no/debug/kernel.debug.gz > NOTE! It's approx. 13MB compressed! The kernel's not much use by itself. =20 Greg -- See complete headers for address and phone numbers --xjyYRNSh/RebjC6o Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQE/LFI/IubykFB6QiMRAopKAKCf2G3x37Ydoc8imOpr+io7M9K1QwCeIimH 2dYcP+7C1iWau/SLgabPiR8= =LFJw -----END PGP SIGNATURE----- --xjyYRNSh/RebjC6o--
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