8361639: JFR: Incorrect top frame for I/O events

[egahlin]

Could I have a review of the change that ensures that the top frame for I/O events is not an internal JDK method, such as FileReadEvent::offer?

Testing: tier1 + jdk/jdk/jfr

Thanks
Erik

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Issue

• JDK-8361639: JFR: Incorrect top frame for I/O events (Bug - P3)

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[AlanBateman]

The other case is the socket adaptor, as in SocketChannel::socket.