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Date: Fri, 15 Apr 2016 12:13:47 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: "freebsd-sparc64@freebsd.org" <freebsd-sparc64@freebsd.org>
Subject: Re: qemu-system-sparc64: entering the debugger
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On Thu, Apr 14, 2016 at 02:41:25PM +0100, Mark Cave-Ayland wrote:
> On 12/04/16 13:51, Mark Cave-Ayland wrote:
> > The NULL pointer reference occurs here:
> > 
> > 0x00000000c0122008:  ldx  [ %l2 + 0x3d8 ], %g1     ! %g1 = 0
> > 0x00000000c012200c:  ldx  [ %g1 + 0x18 ], %g1      !
> > 0x00000000c0122010:  brz,pn   %g1, 0xc0122050
> > 0x00000000c0122014:  nop
> > 
> > AFAICT the corresponding part of db_ps.c is this:
> > 
> > if (p->p_session != NULL && SESS_LEADER(p))
> >     strlcat(state, "s", sizeof(state));
> > 
> > Here p->p_session expands to p->p_pgrp->pg_session which gives us the
> > exception because p->p_pgrp is set to NULL. So I guess this is a bug,
> > but not the bug I'm looking for...
I fixed this in r298043, thank you for the report.