--- old/src/hotspot/share/prims/methodHandles.cpp	2017-12-19 18:23:39.000000000 +0300
+++ new/src/hotspot/share/prims/methodHandles.cpp	2017-12-19 18:23:38.000000000 +0300
@@ -122,6 +122,48 @@
   ALL_KINDS      = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE
 };
 
+int MethodHandles::ref_kind_to_flags(int ref_kind) {
+  assert(ref_kind_is_valid(ref_kind), "%d", ref_kind);
+  int flags = (ref_kind << REFERENCE_KIND_SHIFT);
+  if (ref_kind_is_field(ref_kind)) {
+    flags |= IS_FIELD;
+  } else if (ref_kind_is_method(ref_kind)) {
+    flags |= IS_METHOD;
+  } else if (ref_kind == JVM_REF_newInvokeSpecial) {
+    flags |= IS_CONSTRUCTOR;
+  }
+  return flags;
+}
+
+Handle MethodHandles::resolve_MemberName_type(Handle mname, Klass* caller, TRAPS) {
+  Handle empty;
+  Handle type(THREAD, java_lang_invoke_MemberName::type(mname()));
+  if (!java_lang_String::is_instance_inlined(type())) {
+    return type; // already resolved
+  }
+  Symbol* signature = java_lang_String::as_symbol_or_null(type());
+  if (signature == NULL) {
+    return empty;  // no such signature exists in the VM
+  }
+  Handle resolved;
+  int flags = java_lang_invoke_MemberName::flags(mname());
+  switch (flags & ALL_KINDS) {
+    case IS_METHOD:
+    case IS_CONSTRUCTOR:
+      resolved = SystemDictionary::find_method_handle_type(signature, caller, CHECK_(empty));
+      break;
+    case IS_FIELD:
+      resolved = SystemDictionary::find_field_handle_type(signature, caller, CHECK_(empty));
+      break;
+    default:
+      THROW_MSG_(vmSymbols::java_lang_InternalError(), "unrecognized MemberName format", empty);
+  }
+  if (resolved.is_null()) {
+    THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MemberName type", empty);
+  }
+  return resolved;
+}
+
 oop MethodHandles::init_MemberName(Handle mname, Handle target, TRAPS) {
   // This method is used from java.lang.invoke.MemberName constructors.
   // It fills in the new MemberName from a java.lang.reflect.Member.