> Classes in the `java.lang.ref` package would benefit from an update to bring > the spec in line with how the VM already behaves. The changes would focus on > _happens-before_ edges at some key points during reference processing. > > A couple key things we want to be able to say are: > - `Reference.reachabilityFence(x)` _happens-before_ reference processing > occurs for 'x'. > - `Cleaner.register()` _happens-before_ the Cleaner thread runs the > registered cleaning action. > > This will bring Cleaner in line (or close) with the memory visibility > guarantees made for finalizers in [JLS > 17.4.5](https://docs.oracle.com/javase/specs/jls/se18/html/jls-17.html#jls-17.4.5): > _"There is a happens-before edge from the end of a constructor of an object > to the start of a finalizer (ยง12.6) for that object."_
Brent Christian has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 69 commits: - Merge branch 'master' into refDocs2 - add link to Thread.isAlive() - small review tweaks; shorten MemoryConsistency links - small grammar fixes - new section for finalizer memviz - add memviz bullet for finalization - remove quotes from dequeue - package spec updates, mostly about reference queues and dequeueing - move reachability section before notification; update section header - add details on use of reference queues; swap reachability/memviz sections - ... and 59 more: https://git.openjdk.org/jdk/compare/7bf1989f...d7cbf0d3 ------------- Changes: https://git.openjdk.org/jdk/pull/16644/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16644&range=31 Stats: 226 lines in 4 files changed: 132 ins; 19 del; 75 mod Patch: https://git.openjdk.org/jdk/pull/16644.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16644/head:pull/16644 PR: https://git.openjdk.org/jdk/pull/16644
