Date: Tue, 27 Jun 2006 17:34:46 +0400 From: Yar Tikhiy <yar@comp.chem.msu.su> To: Maxim Konovalov <maxim@macomnet.ru> Cc: Denis Shaposhnikov <dsh@vlink.ru>, freebsd-current@freebsd.org, Gleb Smirnoff <glebius@freebsd.org> Subject: Re: broken stack trace (Was: carp kernel trap) Message-ID: <20060627133446.GB40621@comp.chem.msu.su> In-Reply-To: <20060627171415.V87634@mp2.macomnet.net> References: <87fyhwf6z0.fsf@neva.vlink.ru> <20060627111334.GE36941@comp.chem.msu.su> <20060627171415.V87634@mp2.macomnet.net>
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On Tue, Jun 27, 2006 at 05:17:15PM +0400, Maxim Konovalov wrote:
> Btw, Yar, while working on this panic I noticed the trace is not
> correct. gdb shows sin=0x0 but oviously it is not. Any ideas why?
>
> > #12 0xc054733a in carp_set_addr (sc=0xc115bc00, sin=0x0) at ../../../netinet/ip_carp.c:1439
> > ifp = (struct ifnet *) 0xc1291000
> > cif = (struct carp_if *) 0x6b5
> > ia = (struct in_ifaddr *) 0xc12a4500
> > ia_if = (struct in_ifaddr *) 0xc1291000
> > imo = (struct ip_moptions *) 0xc115bc0c
> > addr = {s_addr = 301990112}
> > iaddr = 3239427084
> > own = 0
> > error = -1066976812
It must be fallout from optimization by gcc. Alas, absolutely
reliable debugging of function arguments and automatic variables
is possible only after -O0 was specified explicitly to gcc, according
to my experience with gcc and gdb.
--
Yar
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