Review request for 4917309 and 6864003 (original) (raw)

Mandy Chung Mandy.Chung at Sun.COM
Thu Jul 23 23:53:58 UTC 2009

This review request is for both the HotSpot runtime and the core libs teams.

Fixed 4917309: (cl) Reduce internal usage of ClassNotFoundExceptions during class-loading Fixed 6864003: Modify JVM_FindClassFromBootLoader to return null if class not found

Summary: o Fix java.lang.ClassLoader to use the new VM entry point JVM_FindClassFromBootLoader for load a system class from the bootstrap classloader that will reduce the number of ClassNotFoundException objects thrown by the application class loader by 50%. The remaining half of the ClassNotFoundException objects are thrown by the extension class loader which is the parent of the application class loader. o ClassLoader.loadClass and ClassLoader.findSystemClass will throw ClassNotFoundException as they are specified. o JVM_FindClassFromBootLoader is currently not used (going to used by the java launcher see 6864028). There is no issue of changing it to return null instead of throwing CNFE.

Webrev: http://cr.openjdk.java.net/~mchung/4917309/hotspot-webrev/ http://cr.openjdk.java.net/~mchung/4917309/jdk-webrev/

Thanks Mandy

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