Some objects in the archive heap contain native pointers. E.g., archived java.lang.Class objects contains a pointer to its Klass* metadata.

At runtime, if the archived metadata are mapped at an alternative address, all of the Klass* pointers must be relocated, Currently this is done in an ad-hoc way

https://github.com/openjdk/jdk/blob/3ac91b08cbe16bc1a347178f853513f930ffeaf3/src/hotspot/share/classfile/javaClasses.cpp#L1275-L1285

void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) {
  if (MetaspaceShared::relocation_delta() != 0) {

    Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
    if (ak != NULL) {
      archived_mirror->metadata_field_put(_array_klass_offset,
          (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
    }

Proposal:

Mark all native pointers using a bitmap so they can be relocated at runtime. This also makes it easy to support new types of archived objects that have native pointers. E.g., java.lang.invoke.ResolvedMethodName, which has a pointer to the Method*.