RFR: 8282475: SafeFetch should not rely on existence of Thread::current [v6]

[Anton Kozlov]

On Wed, 9 Mar 2022 20:25:02 GMT, Johannes Bechberger <duke at openjdk.java.net> wrote:

> Interesting. But I would nonetheless create an assertion that checks that there is no nesting in the case without a Thread object. I would this using a thread local nesting counter in the ThreadWXEnable class (incremented in the constructor and decremented in the destructor).

Hmm, yes. And the assert would need to check the native thread still don't have a Thread object, i.e. the either Thread or TLS is used for tracking. This looks rather complicated, I agree.

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PR: https://git.openjdk.java.net/jdk/pull/7727