diff -r 01960eec4570 -r a7bc87a63dd8 src/hotspot/share/classfile/systemDictionary.cpp
--- a/src/hotspot/share/classfile/systemDictionary.cpp	Tue Apr 10 08:15:40 2018 -0400
+++ b/src/hotspot/share/classfile/systemDictionary.cpp	Tue Apr 10 10:06:42 2018 -0400
@@ -44,6 +44,7 @@
 #include "code/codeCache.hpp"
 #include "compiler/compileBroker.hpp"
 #include "gc/shared/gcTraceTime.inline.hpp"
+#include "gc/shared/oopStorage.inline.hpp"
 #include "interpreter/bytecodeStream.hpp"
 #include "interpreter/interpreter.hpp"
 #include "logging/log.hpp"
@@ -117,6 +118,8 @@
 
 const int defaultProtectionDomainCacheSize = 1009;
 
+OopStorage* SystemDictionary::_vm_weak_oop_storage = NULL;
+
 
 // ----------------------------------------------------------------------------
 // Java-level SystemLoader and PlatformLoader
@@ -1012,7 +1015,9 @@
                                                       CHECK_NULL);
 
   if (host_klass != NULL && k != NULL) {
-    // If it's anonymous, initialize it now, since nobody else will.
+    // Anonymous classes must update ClassLoaderData holder (was host_klass loader)
+    // so that they can be unloaded when the mirror is no longer referenced.
+    k->class_loader_data()->initialize_holder(Handle(THREAD, k->java_mirror()));
 
     {
       MutexLocker mu_r(Compile_lock, THREAD);
@@ -1032,6 +1037,8 @@
     if (cp_patches != NULL) {
       k->constants()->patch_resolved_references(cp_patches);
     }
+
+    // If it's anonymous, initialize it now, since nobody else will.
     k->eager_initialize(CHECK_NULL);
 
     // notify jvmti
@@ -1848,6 +1855,10 @@
                                     GCTimer* gc_timer,
                                     bool do_cleaning) {
 
+  {
+    GCTraceTime(Debug, gc, phases) t("SystemDictionary WeakHandle cleaning", gc_timer);
+    vm_weak_oop_storage()->weak_oops_do(is_alive, &do_nothing_cl);
+  }
 
   bool unloading_occurred;
   {
@@ -1896,9 +1907,11 @@
     // Only the protection domain oops contain references into the heap. Iterate
     // over all of them.
     _pd_cache_table->oops_do(strong);
+    vm_weak_oop_storage()->oops_do(strong);
   } else {
    if (weak != NULL) {
      _pd_cache_table->oops_do(weak);
+     vm_weak_oop_storage()->oops_do(weak);
    }
   }
 
@@ -1924,6 +1937,8 @@
   invoke_method_table()->oops_do(f);
 
   ResolvedMethodTable::oops_do(f);
+
+  vm_weak_oop_storage()->oops_do(f);
 }
 
 // CDS: scan and relocate all classes in the system dictionary.
@@ -3105,3 +3120,15 @@
   return (loader_data->class_loader() == NULL ? "<bootloader>" :
           SystemDictionary::loader_name(loader_data->class_loader()));
 }
+
+void SystemDictionary::initialize_oop_storage() {
+  _vm_weak_oop_storage =
+    new OopStorage("VM Weak Oop Handles",
+                   VMWeakAlloc_lock,
+                   VMWeakActive_lock);
+}
+
+OopStorage* SystemDictionary::vm_weak_oop_storage() {
+  assert(_vm_weak_oop_storage != NULL, "Uninitialized");
+  return _vm_weak_oop_storage;
+}