RFR: 8369622: GlobalChunkPoolMutex needs to be recursive [v2]

[Coleen Phillimore]

On Tue, 14 Oct 2025 05:10:41 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> But you can't use that one because we may not have a current thread and we don't want safepoint interactions for JavaThreads IIUC.
>
> It is a `RecursiveMutex` not `RecursivePlatformMutex`

RecursiveMutex has safepoint interactions only if the current thread is a JavaThread.  It could be modified to have a no-owner sentinel and maybe use os::current_thread() like this equivalent one does.

With this deferred static mechanism, I think it can allocate the semaphore which might not be allowed to be allocated with static linkage.

This code is almost a copy of that.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27759#discussion_r2433781074