59   _has_finalizer = access_flags.has_finalizer();
  60   _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
  61   _init_state = ik->init_state();
  62   _nonstatic_field_size = ik->nonstatic_field_size();
  63   _has_nonstatic_fields = ik->has_nonstatic_fields();
  64   _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
  65   _is_unsafe_anonymous = ik->is_unsafe_anonymous();
  66   _is_hidden = ik->is_hidden();
  67   _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
  68   _has_injected_fields = -1;
  69   _implementor = NULL; // we will fill these lazily
  70 
  71   // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
  72   // This is primarily useful for metadata which is considered as weak roots
  73   // by the GC but need to be strong roots if reachable from a current compilation.
  74   // InstanceKlass are created for both weak and strong metadata.  Ensuring this metadata
  75   // alive covers the cases where there are weak roots without performance cost.
  76   oop holder = ik->klass_holder();
  77   if (ik->class_loader_data()->has_class_mirror_holder()) {
  78     // Though ciInstanceKlass records class loader oop, it's not enough to keep
  79     // VM weak hidden and unsafe anonymous classes alive (loader == NULL). Klass holder should
  80     // be used instead. It is enough to record a ciObject, since cached elements are never removed
  81     // during ciObjectFactory lifetime. ciObjectFactory itself is created for
  82     // every compilation and lives for the whole duration of the compilation.
  83     assert(holder != NULL, "holder of hidden or unsafe anonymous class is the mirror which is never null");
  84     (void)CURRENT_ENV->get_object(holder);
  85   }
  86 
  87   Thread *thread = Thread::current();
  88   if (ciObjectFactory::is_initialized()) {
  89     _loader = JNIHandles::make_local(thread, ik->class_loader());
  90     _protection_domain = JNIHandles::make_local(thread,
  91                                                 ik->protection_domain());
  92     _is_shared = false;
  93   } else {
  94     Handle h_loader(thread, ik->class_loader());
  95     Handle h_protection_domain(thread, ik->protection_domain());
  96     _loader = JNIHandles::make_global(h_loader);
  97     _protection_domain = JNIHandles::make_global(h_protection_domain);
  98     _is_shared = true;
  99   }

  59   _has_finalizer = access_flags.has_finalizer();
  60   _has_subklass = flags().is_final() ? subklass_false : subklass_unknown;
  61   _init_state = ik->init_state();
  62   _nonstatic_field_size = ik->nonstatic_field_size();
  63   _has_nonstatic_fields = ik->has_nonstatic_fields();
  64   _has_nonstatic_concrete_methods = ik->has_nonstatic_concrete_methods();
  65   _is_unsafe_anonymous = ik->is_unsafe_anonymous();
  66   _is_hidden = ik->is_hidden();
  67   _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
  68   _has_injected_fields = -1;
  69   _implementor = NULL; // we will fill these lazily
  70 
  71   // Ensure that the metadata wrapped by the ciMetadata is kept alive by GC.
  72   // This is primarily useful for metadata which is considered as weak roots
  73   // by the GC but need to be strong roots if reachable from a current compilation.
  74   // InstanceKlass are created for both weak and strong metadata.  Ensuring this metadata
  75   // alive covers the cases where there are weak roots without performance cost.
  76   oop holder = ik->klass_holder();
  77   if (ik->class_loader_data()->has_class_mirror_holder()) {
  78     // Though ciInstanceKlass records class loader oop, it's not enough to keep
  79     // non-strong hidden classes and VM unsafe anonymous classes alive (loader == NULL). Klass holder should
  80     // be used instead. It is enough to record a ciObject, since cached elements are never removed
  81     // during ciObjectFactory lifetime. ciObjectFactory itself is created for
  82     // every compilation and lives for the whole duration of the compilation.
  83     assert(holder != NULL, "holder of hidden or unsafe anonymous class is the mirror which is never null");
  84     (void)CURRENT_ENV->get_object(holder);
  85   }
  86 
  87   Thread *thread = Thread::current();
  88   if (ciObjectFactory::is_initialized()) {
  89     _loader = JNIHandles::make_local(thread, ik->class_loader());
  90     _protection_domain = JNIHandles::make_local(thread,
  91                                                 ik->protection_domain());
  92     _is_shared = false;
  93   } else {
  94     Handle h_loader(thread, ik->class_loader());
  95     Handle h_protection_domain(thread, ik->protection_domain());
  96     _loader = JNIHandles::make_global(h_loader);
  97     _protection_domain = JNIHandles::make_global(h_protection_domain);
  98     _is_shared = true;
  99   }