How to debug MPI with CLion?

Question

How to debug mpi program with Clion?
Executable is set mpirun, that's why I can not debug as usual, I think, so how to do it? Thanks

Answer 1

As Zulan already mentioned,

1. Add these lines before your breakpoint and rebuild your application (from OpenMPI)

    int i = 0;
    while(0==i)
       sleep(5);
   

2. Launch your program from the terminal with mpirun

$mpirun -np 4 ./Application

3. Attach LLDB or GDB to a local process

Run-> Attach to Process

4. Pause Program (the program will pause on sleep(5))

5. Set i!=0 and Resume Program

6. Happy debugging

You may need to connect to your other processes to set i!=0 and continue debugging.