RFR: 8296492: Remove ObjectLocker in JVMTI get_subgroups call [v5]

[Coleen Phillimore]

On Tue, 8 Nov 2022 23:35:47 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Forgot a null check.
>
> src/hotspot/share/prims/jvmtiEnvBase.cpp line 540:
> 
>> 538: 
>> 539: jthread *
>> 540: JvmtiEnvBase::new_jthreadArray(int length, Handle *handles) {
> 
> Shouldn't this method need to cast the return value to `jthread*`? And potentially shouldn't all the jobject's now be jthread's?

jthread and jthreadGroup are typedefs to jobject in JVMTI spec.
https://docs.oracle.com/en/java/javase/11/docs/specs/jvmti.html#jthread

But I updated the code to have the more specific types.

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PR: https://git.openjdk.org/jdk/pull/11033