RFR: 8266593: vmTestbase/nsk/jvmti/PopFrame/popframe011 fails with "assert(java_thread == _state->get_thread()) failed: Must be" [v3]

[David Holmes]

On Thu, 18 Nov 2021 09:34:13 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> The test fails when the target JavaThread has is_exiting() status. In such a case the JvmtiExport::cleanup_thread(this) has already made a clean up of its jvmtiThreadState, so the JavaThread address returned by _state->get_thread() is 0xbabababababababa.
>> The fix is to add a check for is_exiting() status into handshake closure do_thread() early.
>> There following handshake closures are fixed by this update:
>>   - UpdateForPopTopFrameClosure
>>  - SetForceEarlyReturn
>>  - SetFramePopClosure
>
> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   get rid of the checks in jvmti handshakes: java_thread->threadObj() == NULL

Hi Serguei,

I still feel the bug here can be fixed simply by moving assertions, rather than by introducing a change in behaviour as to what error code would be returned.

But I'll leave to serviceability folk to decide.

Thanks,
David

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PR: https://git.openjdk.java.net/jdk/pull/6440