[master] RFR: Implement Shenandoah support [v22]

Wed Apr 20 12:46:11 UTC 2022

On Wed, 20 Apr 2022 12:32:48 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> Any comments on this? Why does it relevant?
>
> Ah yes. We must coordinate with concurrent monitor deflation. Specifically, we must prevent monitors from being deflated while we try to get hold of the object mark word for fetching the object size during evacuation. The protocol is relatively simple: relevant threads must respond to safepoint and/or suspension requests.
> See also: https://github.com/openjdk/lilliput/blob/47392f37f85747c0e82d21ee475ffa2935c17a0b/src/hotspot/share/runtime/synchronizer.cpp#L1590

I meant why it is relevant to this PR? Should this be fixed upstream first?

-------------

PR: https://git.openjdk.java.net/lilliput/pull/32