RFR 8221507: Implement JFR Events for Shenandoah

[Severin Gehwolf]

cc'ing hotspot-gc-dev as this also touches GC code (shenandoah).

On Fri, 2019-05-03 at 10:44 -0400, Ken Dobson wrote:
> Hi all,
> 
> Please review this patch that adds support for two new JFR events
> ShenandoahHeapRegionStateChange and ShenandoahHeapRegionInformation.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8221507
> Webrev: http://cr.openjdk.java.net/~kdobson/53476/webrev/
> 
> The Shenandoah team has also reviewed this patch and approved it from their
> end.
> 
> Thanks,
> 
> Ken Dobson