The compiler can generate multiple outlined routines from a single parallel region. This means that a single line of source code can generate multiple blocks of machine code inside different functions.

You can’t single step into or out of a parallel region. Instead, set a breakpoint inside the parallel region and let the process run to it. After execution reaches the parallel region, you can single step in it.

OpenMP programs are multi-threaded programs, so the rules for debugging multi-threaded programs apply.