RFR: 8316401: sun/tools/jhsdb/JStackStressTest.java failed with "InternalError: We should have found a thread that owns the anonymous lock"

Tue Sep 26 02:30:10 UTC 2023

On Tue, 26 Sep 2023 02:14:40 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Ah! I guess we get used to talking about "at a safepoint" when we really mean "at a fixed point in time". So the VM is not necessarily at a safepoint, but everything is fixed. So invariants may not hold, but the state cannot change.

Correct!

> So in the current context the anonymous owner should be found ...

That's what I concluded based on Roman's description of how things work.

>  I guess the question to be answered is how the code tries to find an anonymous owner? I'm not sure how you can find it.

I'm not sure yet. I'll need to have a look.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15907#discussion_r1336555978