RFR: 8261160: Add a deserialization JFR event

[Daniel Fuchs]

On Tue, 9 Feb 2021 12:35:27 GMT, Chris Hegarty <chegar at openjdk.org> wrote:

> This issue adds a new event to improve diagnostic information of Java deserialization. The event captures the details of deserialization activity from ObjectInputStream. The event details are similar to that of the serial filter, but is agnostic of whether a filter is installed or not. The event also captures the filter status, if there is one.

src/jdk.jfr/share/classes/jdk/jfr/events/DeserializationEvent.java line 35:

> 33: 
> 34: @Category({"Java Development Kit", "Serialization"})
> 35: @Label("Deserialization events")

This seems to differ from the format of other event labels defined in this package, e.g:

@Label("Process Start")
@Label("File Read")
...

What would you think of changing it to one of:

 @Label("Deserialization")
 @Label("Deserialized Object")

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PR: https://git.openjdk.java.net/jdk/pull/2479