RFR: 8334781: JFR crash: assert(((((JfrTraceIdBits::load(klass)) & ((JfrTraceIdEpoch::this_epoch_method_and_class_bits()))) != 0))) failed: invariant

[Erik Gahlin]

On Sat, 13 Jul 2024 14:47:21 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

> Greetings,
> 
> Please help review this adjustment, which fixes rare situations where methods that have been retransformed or redefined can be perceived as being tagged by JFR when they, in fact, are not. The fix unconditionally sets the metatag clear bits on artefact initialization and adds assertions about the JFR bit tag state machine.
> 
> Testing: jdk_jfr, stress testing
> 
> Thanks
> Markus

Marked as reviewed by egahlin (Reviewer).

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

PR Review: https://git.openjdk.org/jdk/pull/20171#pullrequestreview-2176439194