On Fri, 28 Aug 2026 12:48:42 GMT, Alan Bateman <[email protected]> wrote:
> I worry this is a significant behavior change that will blind some heap
> analysis tools. As part of "I'm still working on this", would you mind
> looking into synthesizing these refs so that tools using FollowReferences
> will follow refs to the loaded classes?
Rather than relying on the ArrayList of Class objects in ClassLoader to provide
the reference links, can we update the `VM_HeapWalkOperation` used by JVMTI
FollowReferences to treat ClassLoaders specially?
The `VM_HeapWalkOperation::visit` operation in jvmtiTagMap.cpp can add a case
for classloaders to iterate them specially:
if (klass->is_class_loader_instance_klass()) {
return iterate_over_classloader(o);
}
where `iterate_over_classloader` fetches the ClassLoaderData and then iterates
over its _klasses?
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PR Comment: https://git.openjdk.org/jdk/pull/32519#issuecomment-5456302430
