RFR: 8265753: Remove manual JavaThread transitions to blocked [v6]

[Robbin Ehn]

On Mon, 24 May 2021 16:28:15 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Final fixes: last famous words
>
> src/hotspot/share/prims/jvmtiRawMonitor.cpp line 405:
> 
>> 403: 
>> 404:   guarantee(self == _owner, "invariant");
>> 405:   guarantee(save == _recursions, "invariant");
> 
> Since you just restored the `_recursions` field on L402, why do
> you need this guarantee() 2 code lines later?

I left it since if we do changes here those two should be true even after any changes.
I can remove it.

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PR: https://git.openjdk.java.net/jdk/pull/3875