[jdk17u-dev] RFR: 8289524: Add JFR JIT restart event

[Goetz Lindenmaier]

On Wed, 2 Nov 2022 09:13:56 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> backport of 8289524

Hi
I would second Matthias' pledge. 
The changes to non-jfr code by this change are minimal and trivial.
The risk of breaking something thus is small. 
The event is only a small improvement for side-case, if properly
setup a vm should not start and stop the JIT. Nevertheless it
might be useful analyzing systems in abnormal states.
Tools using JFR data should be able to handle added fields.
The cited "bug" nor really is a bug, it is about spelling of commands.
It should be backported, too. But it can not be taken as proof
for this being a complicated, risky change.

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PR: https://git.openjdk.org/jdk17u-dev/pull/853