RFR: 8307153: JVMTI GetThreadState on carrier should return STATE_WAITING [v3]

[Serguei Spitsyn]

On Tue, 6 Jun 2023 15:43:02 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Okay, I see you point. Unfortunately, I've always referred the platform thread with an executed FJP schedular as a carrier thread. The term 'carrier' with this meaning is everywhere in the JVMTI code. It looks very confusing to call a thread to be a carrier thread only during some phases of its execution.
>
>> Okay, I see you point. Unfortunately, I've always referred the platform thread with an executed FJP schedular as a carrier thread. The term 'carrier' with this meaning is everywhere in the JVMTI code. It looks very confusing to call a thread to be a carrier thread only during some phases of its execution.
> 
> Okay, I'm just pointing out that is_passive_carrier_thread looks a bit strange here as it is testing if a JavaThread is carrying a virtual thread oop -  it's not testing if the thread is owned by the virtual thread scheduler.

I'm still thinking what identifier to use instead of `is_passive_carrier_thread`.
Just `is_carrier_thread` is going to be confusing as well.
What about `is_carrier_thread_waiting_for_virtual` or `is_carrier_thread_waiting_for_virtual_to_unmount`?

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/14298#discussion_r1220435738