RFR: 8262454: Handshake timeout improvements, single target, kill unfinished thread [v5]

[Daniel D.Daugherty]

On Thu, 11 Mar 2021 19:52:24 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> When executing a single target handshake we do not have a timeout.
>> When we timeout we should crash the thread with the non-completed handshake operation.
>> 
>> VM_Handshake only had one implementer so I remove it.
>> 
>> Passes t1-5.
>
> Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Sorted imports

Thumbs up.

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Marked as reviewed by dcubed (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2743