RFR: 8257831: Suspend with handshakes [v2]

[Robbin Ehn]

On Wed, 31 Mar 2021 05:53:43 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Robbin Ehn has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
>> 
>>  - Merge branch 'master' into SuspendInHandshake
>>  - 8257831: Suspend with handshake (review baseline)
>
> src/hotspot/share/runtime/handshake.hpp line 148:
> 
>> 146:   // Called from the async handshake (the trap)
>> 147:   // to stop a thread from continuing executing when suspended.
>> 148:   void suspend_in_handshake();
> 
> I'm finding the terminology very confusing here: handshake_suspend versus suspend_in_handshake ? It isn't at all clear which method is used in which part of the protocol. The same goes for the different closures.

Fixing

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