src/hotspot/share/oops/instanceMirrorKlass.inline.hpp

*** 50,11 ***
  
    if (Devirtualizer::do_metadata(closure)) {
      Klass* klass = java_lang_Class::as_Klass_raw(obj);
      // We'll get NULL for primitive mirrors.
      if (klass != NULL) {
!       if (klass->is_instance_klass() && klass->class_loader_data()->has_class_mirror_holder()) {
          // A non-strong hidden class or an unsafe anonymous class doesn't have its own class loader,
          // so when handling the java mirror for the class we need to make sure its class
          // loader data is claimed, this is done by calling do_cld explicitly.
          // For non-anonymous classes the call to do_cld is made when the class
          // loader itself is handled.
--- 50,17 ---
  
    if (Devirtualizer::do_metadata(closure)) {
      Klass* klass = java_lang_Class::as_Klass_raw(obj);
      // We'll get NULL for primitive mirrors.
      if (klass != NULL) {
!       if (klass->class_loader_data() == NULL) {
+         // This is a mirror that belongs to a shared class that has not be loaded yet.
+         // It's only reachable via HeapShared::roots(). All of its fields should be zero
+         // so there's no need to scan.
+         assert(klass->is_shared(), "must be");
+         return;
+       } else if (klass->is_instance_klass() && klass->class_loader_data()->has_class_mirror_holder()) {
          // A non-strong hidden class or an unsafe anonymous class doesn't have its own class loader,
          // so when handling the java mirror for the class we need to make sure its class
          // loader data is claimed, this is done by calling do_cld explicitly.
          // For non-anonymous classes the call to do_cld is made when the class
          // loader itself is handled.