Handle Debugging

Based on https://github.com/jsquyres/ompi/blob/topic/mpiforum-tools-wg-handle-introspection/ompi/debuggers/mpihandles_interface.h and OMPD

• Bootstrapping (C&P from OMPD)

• Debugger-provided Callbacks (OMPD will add callbacks for stepping)

• Queries

  • Communicator queries
  • Request queries
  • Op queries
  • Status queries
  • Type queries
  • File queries
  • Window queries
  • Group queries
  • Session queries
  • Error queries

• Identify internal MPI threads?

• Use cases