RFR: 8273608: Deadlock when jcmd of OnError attaches to itself [v4]

[Xin Liu]

On Tue, 5 Oct 2021 18:07:35 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> Xin Liu has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Cleanup: remove a statment of debugging.
>
> src/hotspot/share/runtime/mutexLocker.cpp line 376:
> 
>> 374: }
>> 375: 
>> 376: void unlock_locks_on_error(JavaThread* thread) {
> 
> Does this have to live in mutexLocker.cpp? Seems to be highly specific to error handling and would make more sense as a function local static in vmError.cpp.

`unlock_locks_on_error` refers to `_mutex_array`, which is a static variable.

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PR: https://git.openjdk.java.net/jdk/pull/5590