RFR: Adapt upstream object pinning API

[Roman Kennke]

Am 04.04.2018 um 19:52 schrieb Zhengyu Gu:
> 
> 
> On 04/04/2018 01:49 PM, Roman Kennke wrote:
>> Am 04.04.2018 um 19:39 schrieb Zhengyu Gu:
>>> On 04/04/2018 01:33 PM, Roman Kennke wrote:
>>>> Am 04.04.2018 um 19:02 schrieb Zhengyu Gu:
>>>>> Adapted upstream object pinning API, also made adjustment to critical
>>>>> native support to use new API.
>>>>>
>>>>>
>>>>> Webrev:
>>>>> http://cr.openjdk.java.net/~zgu/shenandoah/pin_interface/webrev.00/
>>>>>
>>>>> Test:
>>>>>
>>>>>     hotspot_gc_shenandoah on Linux x64 and Windows x64 (release +
>>>>> fastdebug)
>>>>>
>>>>>
>>>>> Thanks,
>>>>>
>>>>> -Zhengyu
>>>>
>>>> I was about to merge from upstream jdk/jdk in the next few days. Maybe
>>>> that would get it in anyway?
>>>
>>> Yes, it will work. I did this for testing, to make sure that it actually
>>> works.
>>>
>>> I withdraw this patch.
>>
>> We should consider this. Critical pinning with upstream API depends on
>> JDK-8200429 which is in jdk/hs but not yet jdk/jdk. I usually only merge
>> from jdk/jdk. It may take a little while until we get it through regular
>> means. You can also cherry pick this if you like.
> 
> Just be aware that we already has critical native pinning code in
> Shenandoah with different API, merge from upstream won't be clean merge.

Ah yes. Well then please go ahead with this cherry-pick :-)

Thanks, Roman