RFR: In update-refs, update all code-roots when in degen-gc

[Aleksey Shipilev]

On 09/12/2018 01:02 PM, Roman Kennke wrote:
> http://cr.openjdk.java.net/~rkennke/fix-assert-fwd/webrev.00/

You also need to have the per-root block following the degen_gc_update_roots declaration. See e.g.:

 207     // Per-thread timer block, should have "roots" counters in consistent order
 208     final_traversal_update_roots,
 209     final_traversal_update_thread_roots,
  ....

Otherwise ShenandoahPhaseTimings::record_workers_end would screw up adjacent counters.

-Aleksey