RFR: Trim unused code from Shenandoah SA

[Aleksey Shipilev]

On 11/30/18 1:43 PM, Roman Kennke wrote:
>>> There's quite a lot of code that can be trimmed out of Shenandoah SA
>>> code, now that the broken heap walking is out.
>>>
>>> Testing: manual jstack test, hotspot_gc_shenandoah (ongoing)
>>>
>>> http://cr.openjdk.java.net/~rkennke/trim-shenandoah-sa/webrev.00/
>>
>> Looks okay, *but* field renames should go in separately.
>>
>> Look at it this way: we have to have the possibility to plainly revert all these changesets when
>> heap iteration is back in order. Doing so with your current patch would revert the field renames too.
> 
> I don't think the heap walking code can be done like it is now, but
> instead needs a clean object walking interface like using
> CollectedHeap::object_iterate() or so, but anyway, here's the patch,
> without the renames, but also removing the corresponding vmStructs stuff:
> 
> http://cr.openjdk.java.net/~rkennke/trim-shenandoah-sa/webrev.01/

OK.

-Aleksey