RFR: 8343177: JFR: Remove critical section for thread id assignment [v2]

[Markus Grönlund]

On Thu, 31 Oct 2024 04:53:20 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> If the primordial thread ID assignment is changed from 1 to 3, then that will have to be updated, of course.
>
> 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?

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PR Review Comment: https://git.openjdk.org/jdk/pull/21756#discussion_r1824206872