RFR: Fix object iteration over limit

[Aleksey Shipilev]

On 10/17/2017 09:13 PM, Zhengyu Gu wrote:
> When iterating object using bitmap, we may pass TAMS limit if remaining oops under TAMS are not marked.
> 
> http://cr.openjdk.java.net/~zgu/shenandoah/obj_itr/webrev.00/

I agree this is the bug (and a serious one, at that) -- thanks for catching this!
I understand the fix, but let me see if there is a more concise solution.

-Aleksey