The fix was suggested/provided by @AlanBateman. Continuation should use Unsafe.compareAndSetReference rather than a VH here. We had to change CHM and VT back to Unsafe for similar reasons.
Testing: Mach5 runs of tiers 1-6 are in progress ------------- Commit messages: - 8304448: Kitchensink failed: assert(!thread->is_in_any_VTMS_transition()) failed: class prepare events are not allowed in any VTMS transition Changes: https://git.openjdk.org/jdk/pull/13154/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13154&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8304448 Stats: 14 lines in 1 file changed: 1 ins; 10 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/13154.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13154/head:pull/13154 PR: https://git.openjdk.org/jdk/pull/13154
