RFR(XS) 8224679: Shenandoah: Make ShenandoahParallelCodeCacheIterator noncopyable

[Roman Kennke]

>> Are there no users of iterator() and cset_iterator()? Or which part am I
>> missing?
> 
> We no longer use them since SRP refactor.

If we don't use them, why bother? Why not remove it instead?

Roman

> 
> -Zhengyu
> 
>>
>> Roman
>>
>>
>>> Copies may cause its member '_iters' to be freed multiple times.
>>>
>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8224679
>>> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8224679/webrev.00/
>>>
>>> Test:
>>>    hotspot_gc_shenandoah (fastdebug and release)
>>>
>>> Thanks,
>>>
>>> -Zhengyu
>>