Re: crashinfo fails on 'version'

On Mon, 2 Oct 2023 20:15:30 +0000 (UTC)
"Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> wrote:

> On Fri, 29 Sep 2023, Bjoern A. Zeeb wrote:
>
> > On Fri, 29 Sep 2023, Warner Losh wrote:
> >
> >> On Fri, Sep 29, 2023, 3:56 PM Bjoern A. Zeeb
> >> <bzeeb-lists@lists.zabbadoz.net>
> >> wrote:
> >>
> >>> Hi,
> >>>
> >>> saveinfo wrote a good core, but crashinfo bails on it:
> >>>
> >>> 'version' has unknown type; cast it to its declared type
> >>> 'version' has unknown type; cast it to its declared type
> >>> Unable to find matching kernel for /var/crash/vmcore.1
> >>>
> >>> I've got gdb-13.1_3 installed.
> >>>
> >>> Anyone any insights?
> >>>
> >>
> >> What does kgdb say? Iirc crashinfo uses lldb for this.
> >
> > I would hope the latter was true but:
> >
> > % grep -i lldb /usr/sbin/crashinfo %
> >
> > at least on the version here still very much gdb.
> >
> >
> > I have started to trace and manually called the same commands crashinfo
> > seems to run (without batch).
> >
> > It seems the real problem might be that it cannot find debug symbols
> > inside the VM.
> >
> > I am wondering if there was a way to check for that to make the error
> > messages less cryptic (e.g., maintenance print symbols empty if it does
> > what I would think; I'll hopefully see soon).
> >
> > Also turns out /etc/src.conf on the provided host had WITHOUT_DEBUG_FILES=
> > and even building and installing with -DWITH_DEBUG_FILES does not seem
> > to override that (probably by design), which likely was the reason for
> > no symbols in first place.
> >
> >
> > I'll hopefully have more answers in 20 minutes.  Remote debugging wifi
> > less fun than I hoped.
>
> Well things in src.conf commented out, also tried with
> -DWITHOUT_SPLIT_KERNEL_DEBUG, ... I still get no debugging symbols
> with a main amd64 GENERIC installed.  Neither in /usr/lib/debug not
> /boot/kernel/kernel.  I am totally confused as to why currently.
>
> Build host is 14.0-ALPHA1 from mid August.
>
> Anyone any idea?
>

This is weird since GENERIC has:

GENERIC:makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols

Maybe you also need makeoptions DEBUG+=-O0 to get all the debug symbols?

--
Gary Jennejohn