RFR: 8299089: Instrument global jni handles with tag to make them distinguishable

[David Holmes]

On Tue, 20 Dec 2022 11:44:33 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> Today there is no cheap way of distinguishing global jni handles from local jni handles.

So is the code you added "cheap"? Else what is the performance hit for adding this? Thanks.

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PR: https://git.openjdk.org/jdk/pull/11740