RFR: 8003216: Add JFR event indicating explicit System.gc() cal

[mikhailo.seledtsov at oracle.com]

Looks good to me,

Misha

On 2/26/20 4:50 AM, Erik Gahlin wrote:
> Hi,
>
> Could I have a review of a JFR event that is emitted when System.gc() 
> is called.
>
> Purpose is to collect the stack trace. It is not sufficient with the 
> cause field that the GarbageCollection event has today.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8003216
>
> Webrev:
> http://cr.openjdk.java.net/~egahlin/8003216/
>
> Testing:
> tier1+tier2+jdk/jdk/jfr
>
> Thanks
> Erik
>
>