Integrated: 8378194: Protect process_pending_interp_only() work with JvmtiThreadState_lock

[Serguei Spitsyn]

On Wed, 18 Feb 2026 19:50:11 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> The function `JvmtiThreadState::process_pending_interp_only()` should protect the check with `state->is_pending_interp_only_mode()` and call to `JvmtiEventController::enter_interp_only_mode(state)` with the `JvmtiThreadState_lock`. Some level of optimization with a check of `seen_interp_only_mode()` is used as the code path of the `process_pending_interp_only()` is hot. Then the `seen_interp_only_mode()` has to be set somewhat earlier when the `is_pending_interp_only_mode()` is set.
> This issue was discovered when in the work on the PR update of https://bugs.openjdk.org/browse/JDK-8373367 .
> 
> Testing:
>  - TBD: mach5 tiers 1-5

This pull request has now been integrated.

Changeset: d6044d3e
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/d6044d3e280dc8bb988a6dd7ab6c9a65b1735608
Stats:     18 lines in 3 files changed: 10 ins; 1 del; 7 mod

8378194: Protect process_pending_interp_only() work with JvmtiThreadState_lock

Reviewed-by: amenkov, lmesnik

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PR: https://git.openjdk.org/jdk/pull/29800