Re: Segfault after upgrade.

[Paul Theodoropoulos]

On 5/23/2020 22:29 PM, David J Taylor wrote:
> Yo David!
>
> On Sat, 23 May 2020 19:16:17 +0100
>
> ======================================
>
> Thanks, Paul and Gary.  I checked and the gpsd is indeed a 32-bit 
> program. My new commands for the day learnt!
>
> So why does 3.20 run on a Raspberry Pi 4B and not a 1B?  Has it been 
> tested on a 1B?
>
> I ask these questions because many users will not attempt github and 
> just expect things to work.  The want to run program and not develop or 
> debug them.  They use apt or apt-get to install software, not compile it.
>
> Cheers,
> David

The next step would be to run the command under strace -

    strace -f <path to gpsd>/gpsd <and whatever options you are feeding it>

At least, that's the form I always use, the -f means it 'follows' child 
processes that are created by the main process. Beware that strace can 
generate scads of output, and much of it can appear near incomprehensible. 
You can direct the output to a file using the -o option.

I can never remember whether strace is part of the default installation, 
so you may have to 'apt install strace'.

Despite the inscrutable nature of the output, when something is 
segfaulting, the clues tend to stick out, either by breaking a pattern in 
the output that you can perceive, or in a rather blatant chunk of output 
at the very end before it exits.

--
Paul Theodoropoulos
www.anastrophe.com