Integrated: 8319137: release _object in ObjectMonitor dtor to avoid races

[Patricio Chilano Mateo]

On Mon, 20 Nov 2023 14:44:08 GMT, Patricio Chilano Mateo <pchilanomate at openjdk.org> wrote:

> Please review the following fix which moves the release of the _object WeakHandle back to the ObjectMonitor dtor. Releasing it earlier as we do today introduces a race which can lead to crashes. Tested running tiers123 in mach5.
> 
> This fix is an effective backout of [JDK-8256302](https://bugs.openjdk.org/browse/JDK-8256302).
> 
> Thanks,
> Patricio

This pull request has now been integrated.

Changeset: c39d001c
Author:    Patricio Chilano Mateo <pchilanomate at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/c39d001c7a1ae9eb322a7bb621a03e18c9bf02a1
Stats:     46 lines in 3 files changed: 4 ins; 36 del; 6 mod

8319137: release _object in ObjectMonitor dtor to avoid races

Reviewed-by: stefank, aboldtch, shade, dcubed, eosterlund

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PR: https://git.openjdk.org/jdk/pull/16738