Get loader-classname lock for calls to findLoadedClass #700
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I do not plan to merge this until when the development branches open for 2025-03. At that time I will need to bump the version of org.eclipse.osgi. |
This is related to Open J9 issue eclipse-openj9/openj9#20444 There is a concern that the initial call to findLoadedClass by Equinox is not protected by the same loader-classname lock as the later calls to findLoadedClass/defineClass are. There are concerns that the unprotected findLoadedClass call could catch the JVM in an invalid state if there is another thread in the middle of defining the class. This change replaces the clunky way of doing loader-classname locks with a more efficient strategy. This way we can use this lock around the initial call to findLoadedClass without too much concern over the performance impact. This change also removes some of the old code that still supported Java 6. It is always assumed we now can register the class loaders as parallel capable.
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