Investigate issues with identifying active files in the current solution.
All of my coding sessions show that I am using zero files, and my debugging sessions seem to only log files external to my solution, such as C++ standard library header files. I think this may be an issue handling files which are not in the solution's root directory. All of my files are in <project-root>/src/, instead of just <project-root>/. There are also nested sub-directories in /src/ which could be aggravating the problem.
C++ support at the moment is not supporting the measurement at the language construct lever. It is in the short term roadmap.