Integrated: 8308978: regression with a deadlock involving FollowReferences

[Alex Menkov]

On Tue, 30 May 2023 22:58:58 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The change fixes regression from JDK-8299414.
> There is a deadlock between JvmtiVTMSTransitionDisabler and EscapeBarrier when virtual threads are in mount/unmount transition:
> EscapeBarrier requests deoptimization which requires thread suspension.
> JvmtiVTMSTransitionDisabler ctor waits until all in progress VTMS transitions complete, but they cannot be completed as thread is suspended.
> To avoid the deadlock mount/unmount transitions should be completed before EscapeBarrier stuff.

This pull request has now been integrated.

Changeset: 62c935d4
Author:    Alex Menkov <amenkov at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/62c935d4fa09ed557d301bc28d9bf1480b344989
Stats:     22 lines in 2 files changed: 6 ins; 16 del; 0 mod

8308978: regression with a deadlock involving FollowReferences

Reviewed-by: sspitsyn, lmesnik

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PR: https://git.openjdk.org/jdk/pull/14233