RFR: Do we still need ParallelCodeCacheIterator?

[Aleksey Shipilev]

On 08/31/2018 10:37 PM, Roman Kennke wrote:
> See subject.
> 
> And if we do, can we move it to shenandoahCodeRoots.hpp/cpp ?

We kinda do need it: it is our fallback code rootss style, in case our default one is broken. But we
can move the bulk of the code into shenandoahCodeRoots indeed (still need to be friends with
CodeCache, so upstream exposure is not null):
  http://cr.openjdk.java.net/~shade/shenandoah/codecache-move-inside/webrev.01/

Testing: tier3_gc_shenandoah, adhoc runs with -XX:ShenandoahCodeRootsStyle=1

Thanks,
-Aleksey