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). ------------- Commit messages: - Merge branch 'master' into 8389938_follow_up_removed_use_omt - Renamed UseObjectMonitorTableTest.java to ObjectMonitorTableTest.java - 8389938: Follow up after removing UseObjectMonitorTable flag Changes: https://git.openjdk.org/jdk/pull/32471/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=32471&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8389938 Stats: 138 lines in 18 files changed: 0 ins; 109 del; 29 mod Patch: https://git.openjdk.org/jdk/pull/32471.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/32471/head:pull/32471 PR: https://git.openjdk.org/jdk/pull/32471
