On Thu, 3 Sep 2026 11:29:46 GMT, Fredrik Bredberg <[email protected]> wrote:
>> Since [JDK-8389325](https://bugs.openjdk.org/browse/JDK-8389325) >> `ObjectMonitor::_metadata` only contains a copy of the object’s hash code. >> But: >> >> 1. A `ObjectMonitorTable` lookup get the hash directly from the object’s >> mark word, and ... >> 2. ... no synchronization code uses the copy stored in the monitor. >> >> Therefore this PR removes the redundant `_metadata` field and its related >> metadata/hash accessors, diagnostics, and serviceability support. >> >> 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). > > Fredrik Bredberg has updated the pull request with a new target base due to a > merge or a rebase. The incremental webrev excludes the unrelated changes > brought in by the merge/rebase. The pull request contains four additional > commits since the last revision: > > - For David and Axel > - Merge branch 'master' into 8390970_remove_object_monitor_metadata > - Updated after review > - 8390970: Remove ObjectMonitor::_metadata Re-approved but I specifically did not ask for that change, so don't blame it on me. :) ------------- Marked as reviewed by dholmes (Reviewer). PR Review: https://git.openjdk.org/jdk/pull/32573#pullrequestreview-5108031091
