freebsd-questions Digest, Vol 655, Issue 4

Manish Jain bourne.identity at
Thu Dec 22 13:56:30 UTC 2016

On 12/22/16 17:30, freebsd-questions-request at wrote:
> Hi, Manish,
> The best thing to do here is to open a PR with what details of the crash
> you can extract from the core dump.  You have a full system core, so you
> should be able to follow the instructions here, and extract a backtrace
> from the kernel:

Hello Matthew,

That URL says that first I have to 'locate the debug version of your 
kernel (normally called kernel.debug)'.

Now, I am running the standard generic kernel that was installed by the 
FreeBSD 11 amd64 setup CD. The command 'locate kernel.debug' returns an 
empty string.

Does that mean I have to build a debug version of my kernel before I can 
use kgdb ?

The previous time I had a crash (in  October), I filed a PR at FreeBSD 
bugzilla, but nobody followed up. I suppose nobody can devote too many 
resources to follow up on an isolated problem.

Thanks for your help
Manish Jain

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