RFR: 8255883: Avoid duplicated GeneratedMethodAccessor when reflect method invoked from different threads

[Hui Shi]

On Sat, 14 Nov 2020 00:28:58 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> @JornVernee 
>> Could you please help approve and start  tier1 test?
>> This is same PR with https://github.com/openjdk/jdk/pull/1070
>
> @huishi-hs Testing should start automatically, and will appear here when you push to any branch in your fork that is not `master`: https://github.com/huishi-hs/jdk/actions (unless you disabled this in the repo settings).
> 
> As I said, the `/test` command does not work at this time.

@JornVernee  Thanks!  I didn't enable https://github.com/huishi-hs/jdk/actions. Now it works.

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PR: https://git.openjdk.java.net/jdk/pull/1213