RFR: 8343177: JFR: Remove critical section for thread id assignment [v3]

[Coleen Phillimore]

On Thu, 31 Oct 2024 10:12:47 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

>> Hopefully the value will be available via the ObjectMonitor API so this code can use it symbolically.
>
> What happens to ID 1 and 2? Other threads that need to be tracked, and receive special treatment in a similar manner?

There will be no Java thread-id 1 and 2.  Those values are used as values for deflated-marker and anonymous-owner for ObjectMonitor see https://github.com/openjdk/jdk/pull/21565

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PR Review Comment: https://git.openjdk.org/jdk/pull/21756#discussion_r1824361414