RFR: 8280422: thread_from_jni_environment can never return NULL [v2]

[David Holmes]

On Mon, 24 Jan 2022 02:21:34 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Analysing the code and its use (see JBS issue for gory details) we can see that `thread_from_jni_environment` can never actually return NULL, so we change it to not appear to do so and thus keep static analysis tools happy.  We also always validate the incoming JNIEnv for debug builds and scrap the unused `VerifyJNIEnvThread` flag.
>> 
>> Testing: tiers 1-5
>> 
>> Thanks,
>> David
>
> David Holmes has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright

Correct but this PR did not introduce that behaviour. I only changed the name of the local variable and added the comment.

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PR: https://git.openjdk.java.net/jdk/pull/7193