RFR: 8318757: VM_ThreadDump asserts in interleaved ObjectMonitor::deflate_monitor calls [v11]

[Aleksey Shipilev]

On Wed, 15 Nov 2023 09:46:21 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> A safepointed monitor deflation pass can run interleaved with a paused async monitor deflation pass. The code is not written to handle that situation and asserts when it finds a DEFLATER_MARKER in the owner field. @pchilano also found other issues with having to monitor deflation passes interleaved. More info below ...
>
> Stefan Karlsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   More tweaks to the test

Still good. Are we waiting for some other reviews to integrate this? I have a related fix in pipeline that is blocked by this :)

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16519#pullrequestreview-1734410630