RFR: 8222001: JFR event for heap dumps written

[Erik Gahlin]

|Hi,

Could I have a review of a change that writes an event when a heap dump 
has been written.|

|The tests checks that it works by invoking the dump over JMX, but I 
have also verified manually that it works on command line 
(-XX:+HeapDumpOnOutOfMemoryError) and using jcmd (GC.heap_dump).

Bug:
https://bugs.openjdk.java.net/browse/JDK-8222001

Webrev:
http://cr.openjdk.java.net/~egahlin/8222001/

Testing:
tier1 + tier2, jdk/jdk/jfr

Thanks
Erik
|