RFR: 8299240: rank of JvmtiVTMSTransition_lock can be safepoint

[David Holmes]

On Tue, 14 Feb 2023 05:37:51 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> The rank of JvmtiVTMSTransition_lock is better to be safepoint instead of nosafepoint.
> The fix includes removal of the function `check_vthread_and_suspend_at_safepoint` which is not needed anymore.
> 
> Testing:
> mach5 jobs are in progress:
>  Kitchensink, tiers1-6 (all JVMTI, JDWP, JDI and JDB tests have to be included)

Seems quite reasonable.

Thanks.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12550