SEGFAULT: Getting more information

PLCnext Technology & PLCnext Controls
1

Hi Support,
We have many realtime programs running on our PLC (AXCF 3152, 2023.0). Given that we develop our programs in C++, our code can have SEGFAULTs from time to time. The main problem is when this occurs, we have to play a guessing game to work out which realtime program has the issue, which can be tricky if the problematic programs are stable for days on end, but can sporadically fail.
Hence:

                              * Can we setup a detailed stack trace to catch more information on where the error occurred? 
                              * Could we build debug symbols to assist with this?
                              * Could we use a tool like LTTng (from our other conversations) which dumps information about what tasks were running at the time of a PLC error so we can narrow down where we should be looking?
                              * Do you have any other suggestions?

Thanks again for your continued support.
Kind Regards,
Joshua

2

Hello Joshua,
I would like to recommend to attach the**** debugger to a process at plcnext runtime.Iif you would like to use this option I can provide you the detailed description. You can start the debugger during plc operation. Please give me a short feedback if we can proceed this case via our Ticket System, I think it will be more efficient.
Thanks & BR
Eduard

3

Hi Eduard,
The debugger approach sounds great, please send through more information through the ticket system.
Kind Regards,
Joshua