RFR: 8359472: JVM crashes when attaching a dynamic agent before JVMTI_PHASE_LIVE [v9]

[David Holmes]

On Thu, 16 Oct 2025 22:54:35 GMT, Francesco Andreuzzi <fandreuzzi at openjdk.org> wrote:

>> In this PR I add a check to prevent debug builds to crash when an agent tries to attach while the JVM is not in live phase.
>> 
>> Passes tier1 and tier2 (fastdebug).
>
> Francesco Andreuzzi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   check jcmd exist

Note that while a PR is in draft mode, no emails get generated.

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PR Comment: https://git.openjdk.org/jdk/pull/27766#issuecomment-3413501278