RFR: 8265919: RunThese30M fails "assert((!(((((JfrTraceIdBits::load(value)) & ((1 << 4) << 8)) != 0))))) failed: invariant"

[Erik Gahlin]

On Fri, 25 Jun 2021 09:34:49 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

> Thanks Erik. I don't think there is anything to fix "properly". This is the state reset code that runs when JFR starts, JfrTypeSet::clear(). It is just that it built on an invalid assumption (that no class unload will happen in-between the last rotate() and end_recording()).

Great! I got the impression in JIRA that it could result in a reference being null (in the file), but I may have misunderstood.

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PR: https://git.openjdk.java.net/jdk/pull/4583