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AthenaMP+AthenaMPTools: Allow SharedWriter to be debugged just like any other worker

Alaettin Serhan Mete requested to merge amete/athena:master-add-debug-support-to-sharedwriter into master

This MR allows passing the debug-worker flag to SharedWriter, just like the other workers. It should make debugging w/ gdb a bit easier. The following procedure seems to work OK for me:

Terminal #1

  • Run athena w/ the --debugWorker option, e.g. athena.py --debugWorker --stdcmalloc --nprocs=8 [...],
  • Workers will be stopped after fork, waiting for SIGUSR1 signal,
  • Find the PID of the worker you'd like to debug (e.g. SharedWriter).

Terminal #2

  • Attach gdb to the process to be debugged, i.e. gdb python PID,
  • Once the symbols are loaded, one can perform any gdb action, e.g. insert break points etc.
  • Once ready continue this process w/ signal SIGUSR1.

Terminal #3

  • Signal remaining workers so that they resume. Easiest way to achieve this is to use htop to tag multiple processes (space-bar) and send SIGUSR1 to all (F9).

I'm not sure if there is an easier way to achieve this. Let me tag @tsulaia and @gemmeren for insight. Many thanks.

Edited by Alaettin Serhan Mete

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