src/hotspot/share/gc/z/zRootsIterator.hpp

Concurrent class unloading

   void weak_oops_do(BoolObjectClosure* is_alive, OopClosure* cl);
 };
 
 class ZRootsIterator {
 private:
+  bool                _strong_only;
   ZOopStorageIterator _vm_weak_handles_iter;
   ZOopStorageIterator _jni_handles_iter;
   ZOopStorageIterator _jni_weak_handles_iter;
   ZOopStorageIterator _string_table_iter;
 

@@ -92,10 +93,11
   void do_jvmti_export(OopClosure* cl);
   void do_jvmti_weak_export(OopClosure* cl);
   void do_jfr_weak(OopClosure* cl);
   void do_system_dictionary(OopClosure* cl);
   void do_class_loader_data_graph(OopClosure* cl);
+  void do_class_loader_data_graph_strong_only(OopClosure* cl);
   void do_threads(OopClosure* cl);
   void do_code_cache(OopClosure* cl);
   void do_string_table(OopClosure* cl);
 
   ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_universe>                  _universe;

@@ -107,16 +109,17
   ZSerialOopsDo<ZRootsIterator, &ZRootsIterator::do_system_dictionary>         _system_dictionary;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_vm_weak_handles>         _vm_weak_handles;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_jni_handles>             _jni_handles;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_jni_weak_handles>        _jni_weak_handles;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_class_loader_data_graph> _class_loader_data_graph;
+  ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_class_loader_data_graph_strong_only> _class_loader_data_graph_strong_only;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_threads>                 _threads;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_code_cache>              _code_cache;
   ZParallelOopsDo<ZRootsIterator, &ZRootsIterator::do_string_table>            _string_table;
 
 public:
-  ZRootsIterator();
+  ZRootsIterator(bool strong_only);
   ~ZRootsIterator();
 
   void oops_do(OopClosure* cl, bool visit_jvmti_weak_export = false);
 };