Fixed "double-checked-locking" bug in `ReferenceImplType.classObject()`. Details in the first comment. Tested with the following: - com/sun/jdi - nsk/jdi - nsk/jdwp - nsk/jdb
------------- Commit messages: - Update copyright - Unified 'worst case' comment. - Fix volatile issue with classObject() API. Changes: https://git.openjdk.org/jdk/pull/19439/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19439&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8328611 Stats: 26 lines in 1 file changed: 2 ins; 13 del; 11 mod Patch: https://git.openjdk.org/jdk/pull/19439.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19439/head:pull/19439 PR: https://git.openjdk.org/jdk/pull/19439
