RFR: 8313816: Accessing jmethodID might lead to spurious crashes

[Coleen Phillimore]

On Thu, 16 Nov 2023 03:11:04 GMT, Jaroslav Bachorik <jbachorik at openjdk.org> wrote:

>> src/hotspot/share/oops/method.cpp line 2277:
>> 
>>> 2275:   }
>>> 2276: }
>>> 2277: 
>> 
>> Can this race with redefinition?
>
> The cleanup of previous versions is executed in VM_Operation at a safepoint - therefore we should be safe against races with class redefinitions. 
> I am adding an assert to `clear_jmethod_id()` to check for being at a safepoint.

Yes, these are cleaned at a safepoint.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16662#discussion_r1399798259