kgdb assert while loading a kernel core

[Weike.Chen at Dell.com]

> -----Original Message-----
> From: Cy Schubert <Cy.Schubert at cschubert.com>
> Sent: Tuesday, July 30, 2019 3:49 AM
> To: Chen, Alvin W <Weike_Chen at Dell.com>
> Cc: freebsd-current at freebsd.org
> Subject: Re: kgdb assert while loading a kernel core
> 
> 
> [EXTERNAL EMAIL]
> 
> In message
> <e07d7daaa7d2442b87f794b8629bc578 at KULX13MDC127.APAC.DELL.COM>
> , Weike
> .Chen at Dell.com writes:
> >  Hi all,
> >
> >  I try to do some debugging for the FreeBSD kernel crash.
> >  My system is FreeBSD 12. And I have a kernel core file, and while I
> > load it by kgdb. It reports the following error:
> >
> >  Inferior.c: 287: internal-error: struct inferior
> > *find_inferior_pid(int): As sertion 'pid != 0' failed.
> >
> >  And I also try the gdb in ports/devel, and got the same error.
> >
> >  Any workaround for the error?
> 
> Which kgdb are you using? The /usr/libexec one or the port?
> 
I use the kgdb in port, and I also try the kgdb in /usr/libexec, but it reports error "Cannot access memory at address 0x0" while loading my core file.


> 
> --
> Cheers,
> Cy Schubert <Cy.Schubert at cschubert.com>
> FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  http://www.FreeBSD.org
> 
> 	The need of the many outweighs the greed of the few.
>