RFR: 8341273: JVMTI is not properly hiding some continuation related methods [v5]

[Serguei Spitsyn]

On Thu, 17 Oct 2024 09:16:31 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> This fixes a problem in the VTMS (Virtual Thread Mount State) transition frames hiding mechanism.
>> Please, see a fix description in the first comment.
>> 
>> Testing:
>>  - Verified with new test `vthread/CheckHiddenFrames`
>>  - Mach5 tiers 1-6 are passed
>
> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review: moved notifyJvmtiStart/notifyJvmtiEnd calls from VirtualThread.run to the caller

I believe, I've resolved almost all review comments.
Please, let me know if anything is missed or there are some issues in my latest updates.
The mach5 tiers 1-6 are good.

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PR Comment: https://git.openjdk.org/jdk/pull/21397#issuecomment-2419922957