[patch] JFR profiler

[Aleksey Shipilev]

On 8/6/20 5:47 AM, Jason Zaugg wrote:
> I'd like to contribute a profiler that collects Java Flight Recorder profiles.

Thank you!

I did a few polishings here:
  https://cr.openjdk.java.net/~shade/jmh/jfr-profiler-polish.patch

If those polishings look good for you, I can push the whole thing. I also verified it works with
OpenJDK 8u that recently got JFR (and which does not require -XX:+UnlockCommercialFeatures).

One substantial change is dropping -XX:+IgnoreUnrecognizedVMOptions. I believe profiler should just
fail hard if target VM does not accept -XX:+FlightRecorder. Or maybe I am missing something?

-- 
Thanks,
-Aleksey