RFR: 8306034: add support of virtual threads to JVMTI StopThread [v3]

[Serguei Spitsyn]

On Sat, 22 Apr 2023 00:09:27 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> For the JDI tests I added, I execute them in both modes, with the appropriate adjustments to account for the errors we except for virtual threads. We should be testing to make sure that StopThread works with platform threads under a variety of situations.
>
> Extending this test to cover platform threads does not look natural and is going to be a little ugly.
> But I can extend it to provide coverage for BoundVirtualThread case
> which is highjacking the platform thread implementation.
> Would it help?
> We should have pretty good coverage of the JVMTI `StopThread` for platform threads in `nsk.jvmti` test suite.
> It includes:
>   - `stopthrd006` and `stopthrd007`
>   - a number of `scenarios/capability/CM01 `tests
> 
> Also, this extension does not touch the code path of platform threads support.

I've extended the test to cover platform threads as well.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13546#discussion_r1175995443