RFR: 8257831: Suspend with handshakes [v2]

[Robbin Ehn]

On Tue, 6 Apr 2021 18:53:54 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> Hi Robbin,
> I'm looking at it. I have a concern that it can significantly impact Loom implementation. There is a non-trivial update in Loom to support virtual threads in JVMTI Suspend/Resume. So we need to make sure your approach is going to work for virtual threads as well.

Hi Serguei, I looked at loom implementation.
I will help you do the merge. The main thing seem to split some logic into the handshake itself.

Thanks

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PR: https://git.openjdk.java.net/jdk/pull/3191