RFR: Mark-compact and heuristics should consistently process refs and unload classes

[Aleksey Shipilev]

On 05/30/2017 09:59 AM, Aleksey Shipilev wrote:
> We have copied the random block from Aggressive policy to Passive one. The goal
> for random selection in Aggressive is to exercise all paths. For Passive, we are
> better off being consistent:

Actually, let's also cover mark-compact parts:
  http://cr.openjdk.java.net/~shade/shenandoah/passive-ur-cu/webrev.01/

-Aleksey