RFR 8199868: Support JNI critical functions in object pinning API

[Zhengyu Gu]

Hi Andrew,

Thanks for reviewing.


On 07/31/2018 07:10 AM, Andrew Dinn wrote:
> 
> Zhengyu, I think you need to add an explanation of how this test will
> catch errors that might arise in pinning and, in doing so, perhaps
> comment on a few details of what the test does, viz: What is the point
> of allocating the garbage arrays? What is the point of using
> THREAD_PER_CASE * 2 threads. Why make the run methods iterate CYCLES times?

I added comments as you suggested.

Updated webrev: http://cr.openjdk.java.net/~zgu/8199868/webrev.04/

-Zhengyu

> 
> regards,
> 
> 
> Andrew Dinn
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