RFR: 8282883: Use JVM_LEAF to avoid ThreadStateTransition for some simple JVM entries

[Aleksey Shipilev]

On Wed, 9 Mar 2022 15:28:29 GMT, Yi Yang <yyang at openjdk.org> wrote:

> Some existing JVM_ENTRY routines are behavioral simple, they do not lock, GC or throw exceptions, we could use JVM_LEAF instead of JVM_ENTRY, to avoid ThreadStateTransition and safepoint checks.

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/7760