[jdk20] RFR: 8298162: Test PrintClasses hits assert when run with code that retransform classes [v2]

[Coleen Phillimore]

On Tue, 20 Dec 2022 02:58:10 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Allow scratch class to print InstanceKlass fields and not crash.  We might enhance InstanceKlass::print_on() to print more of the misc_flags information in the future so this output (rarely seen) doesn't confuse people.
>> Tested with failing test case, and tier1-4.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add requires vm.hasJFR

Thanks for reviewing David and Markus, and thanks for the info on @key jfr.  Also thanks for the diagnosis in the bug, Markus.

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PR: https://git.openjdk.org/jdk20/pull/57