Arm DDT and MHD Debugging

Arm DDT

With help some nice folks at Arm I figured out how to display device arrays in host code, see this post for details.

In preparation for presenting on Arm Forge next week I submitted two PRs (#187 and #188) so that the main and dev branches were always using the C++ version we wanted and so that debug builds would work with the debugger.

MHD Debugging

Now that we have a good debugger I spent some time removing the debugging instrumentation from the MHD code. In the process I found one bug in the magnetic field update kernel and a broken test, both have been fixed.