On Thu, 20 Aug 2026 14:13:27 GMT, Fredrik Bredberg <[email protected]> 
wrote:

> This PR is a follow-up to 
> [JDK-8389325](https://bugs.openjdk.org/browse/JDK-8389325) ("Remove the 
> UseObjectMonitorTable flag and related code"). It:
> - Removes obsolete mark-word and monitor-pointer support.
> - Removes displaced-mark related code in garbage collectors (G1, Parallel GC 
> and Shenandoah).
> - Renames UseObjectMonitorTableTest to ObjectMonitorTableTest.
> - Addresses all the leftover review comments from 
> [JDK-8389325](https://bugs.openjdk.org/browse/JDK-8389325).
> 
> Passes tier1-5 tests successfully on supported platforms.
> 
> ---------
> - [x] I confirm that I make this contribution in accordance with the [OpenJDK 
> Interim AI Policy](https://openjdk.org/legal/ai).

There is still a stale comment in one of our test frameworks:

https://github.com/openjdk/jdk/blob/dba3cffb73f8eec4c102a2fdfa68a035923d8edb/test/hotspot/jtreg/vmTestbase/nsk/share/gc/gp/misc/HashedGarbageProducer.java#L34-L48

I think removing the first paragraph and rewriting the second one to just 
mention GC mark word preservation is enough to explain why this code still does 
`System.identityHashCode(obj);`

-------------

PR Review: https://git.openjdk.org/jdk/pull/32471#pullrequestreview-5005343067

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