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

[David Holmes]

On Mon, 19 Dec 2022 18:56:57 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.

Fix looks good but test needs a tweak. Thanks.

test/hotspot/jtreg/runtime/CommandLine/PrintClasses.java line 38:

> 36:  * @summary Test jcmd VM.classes
> 37:  * @library /test/lib
> 38:  * @run main/othervm -XX:StartFlightRecording PrintClasses

I think if you want to run JFR you also need:

 * @requires vm.hasJFR
 ```
and possibly:

* @key jfr

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Marked as reviewed by dholmes (Reviewer).

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