[jdk21] RFR: 8300051: assert(JvmtiEnvBase::environments_might_exist()) failed: to enter event controller, JVM TI environments must exist

[Chris Plummer]

On Fri, 21 Jul 2023 22:32:29 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> This is a clean 21 backport of the 22 fix:
>   [JDK-8300051](https://bugs.openjdk.org/browse/JDK-8300051): assert(JvmtiEnvBase::environments_might_exist()) failed: to enter event controller, JVM TI environments must exist
> 
> Testing:
>  - TBD: mach5 tiers 1-5

Looks good.

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Marked as reviewed by cjplummer (Reviewer).

PR Review: https://git.openjdk.org/jdk21/pull/143#pullrequestreview-1544008750