facebook/hhvm — pull request #4544 by rrh (2014-12-30 06:15:43+00:00)
Title: Enable the profiler in server mode.  Don't dump profiler data if it is n...

...ull.

Some kinds of external profilers will want to run in server mode.

Some kinds of profilers don't have any meaningful data to report back to the
CLI, so if the profiler returns a null variant (presumably from a