RFR: 8378194: Protect process_pending_interp_only() work with JvmtiThreadState_lock [v5]

[Serguei Spitsyn]

On Thu, 26 Feb 2026 00:02:21 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:

>> Okay, thanks. Replaced with `load_acquire`/`release_store`.
>
> Well, I think that load_relaxed should be enough here. 
> 
> The `_seen_interp_only_mode` and `_pending_interp_only_mode` are updated with the JvmtiThreadState_lock and changes should be visible together after lock is released.
> 
> So even `_seen_interp_only_mode` is relaxed load/store and might be reordered with `_pending_interp_only_mode`, it is not possible that 
> `_pending_interp_only_mode` is true  in the `JvmtiThreadState::enter_interp_only_mode()`
> while
> `_seen_interp_only_mode`
> is still false.
> 
> It might be possible that it becomes 'true' while the recompute enabled is still in process, but it is ok.

Thank you, Leonid. I have already pushed the update. Keeping `load_acquire/release_store` should be okay for now.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29800#discussion_r2856731478