RFR: 8297600: Check current thread in selected JRT_LEAF methods [v2]

[Aleksey Shipilev]

On Sat, 26 Nov 2022 08:18:42 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Unclear for many JVMCI functions that the thread argument is actually intended/required to be the current thread. It seems unused in many cases so why is it passed?

Yes, I agree the initial patch over-reached in some places. Please see new commit, which reduces it. I left `thread == JavaThread::current()` checks where I can argue the threads are expected to be current.

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PR: https://git.openjdk.org/jdk/pull/11359