RFR: 8223312: Utilize handshakes instead of is_thread_fully_suspended [v2]

[Richard Reingruber]

On Tue, 20 Oct 2020 14:18:57 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

> 
> 
> > Hi,
> > this is a good change, because it is a simplification and it it makes the stack walks safe by doing them as part of a
> > handshake. The change conflicts with #119 though. This one is ready to be pushed since last week but was delayed due to
> > other interferences. Would you mind me integrating #119 first? After integration it would be needed to pull 2
> > EscapeBarriers out of handshakes. Of course I would help do that. Thanks, Richard.
> 
> Hey Richard, go ahead and integrate your 119 first, I'll hold off and do the merge once you integrated.

Thanks Robbin!

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PR: https://git.openjdk.java.net/jdk/pull/729