Daniel Hu

8312049: runtime/logging/ClassLoadUnloadTest can be improved

9

Backport that improves ClassLoadUnloadTest; already backported to [JDK21](https://github.com/openjdk/jdk21u-dev/pull/909) and [JDK17](https://github.com/openjdk/jdk17u-dev/pull/2806). Original commit does not apply cleanly due to the options "-Xlog:class+load+cause" "-Xlog:class+load+cause+native" were not added until a later [version](https://bugs.openjdk.org/browse/JDK-8193513), thus...

8303920: Avoid calling out to python in DataDescriptorSignatureMissing test

12

Clean backport that improves DataDescriptorSignatureMissing test; already backported to 17 and 21. Passes affected test in Linux x64. MacOS GHA failing due to unrelated deprecated code during compile --------- ###...

8316193: jdk/jfr/event/oldobject/TestListenerLeak.java java.lang.Exception: Could not find leak

12

Clean backport that makes TestListenerLeak more robust; already backported to 17 and 21. Passes affected test on Linux x64. MacOS GHA failing due to unrelated deprecated code during compile. ---------...

8316193: jdk/jfr/event/oldobject/TestListenerLeak.java java.lang.Exception: Could not find leak

3

clean backport --------- ### Progress - [ ] Change must be properly reviewed (1 review required, with at least 1 [Reviewer](https://openjdk.org/bylaws#reviewer)) - [x] Change must not contain extraneous whitespace -...