RFR: 8245877: assert(_value != __null) failed: resolving NULL _value in JvmtiExport::post_compiled_method_load [v3]

[David Holmes]

On Tue, 29 Jun 2021 16:38:28 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:

>> The crash happens because nmethod might become a zombie before it is enqueued in JvmtiDeferredEventQueue or after it is dequeued from it. The crash is reproduced by serviceability/jvmti/CompiledMethodLoad/Zombie.java. However, it takes ~3K  runs to hit it. I verified the fix by running this test >100K on each platform. Also, I verified that protecting in 'void JvmtiDeferredEventQueue::post(JvmtiEnv* env)' is not enough.
>
> Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:
> 
>   post updated.

Looks good!

Thanks,
David

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4602