--- old/src/share/vm/classfile/moduleEntry.hpp	2017-03-23 14:05:07.106147730 -0400
+++ new/src/share/vm/classfile/moduleEntry.hpp	2017-03-23 14:05:06.598147709 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -65,6 +65,7 @@
   bool _can_read_all_unnamed;
   bool _has_default_read_edges;        // JVMTI redefine/retransform support
   bool _must_walk_reads;               // walk module's reads list at GC safepoints to purge out dead modules
+  bool _is_open;                       // whether the packages in the module are all unqualifiedly exported
   bool _is_patched;                    // whether the module is patched via --patch-module
   TRACE_DEFINE_TRACE_ID_FIELD;
   enum {MODULE_READS_SIZE = 101};      // Initial size of list of modules that the module can read.
@@ -81,6 +82,7 @@
     _has_default_read_edges = false;
     _must_walk_reads = false;
     _is_patched = false;
+    _is_open = false;
   }
 
   Symbol*          name() const                        { return literal(); }
@@ -112,6 +114,9 @@
   void             add_read(ModuleEntry* m);
   void             set_read_walk_required(ClassLoaderData* m_loader_data);
 
+  bool             is_open() const                     { return _is_open; }
+  void             set_is_open(bool is_open);
+
   bool             is_named() const                    { return (name() != NULL); }
 
   bool can_read_all_unnamed() const {
@@ -193,8 +198,8 @@
   static ModuleEntry* _javabase_module;
   ModuleEntry* _unnamed_module;
 
-  ModuleEntry* new_entry(unsigned int hash, Handle module_handle, Symbol* name, Symbol* version,
-                         Symbol* location, ClassLoaderData* loader_data);
+  ModuleEntry* new_entry(unsigned int hash, Handle module_handle, bool is_open,
+                         Symbol* name, Symbol* version, Symbol* location, ClassLoaderData* loader_data);
   void add_entry(int index, ModuleEntry* new_entry);
 
   int entry_size() const { return BasicHashtable<mtModule>::entry_size(); }
@@ -217,6 +222,7 @@
   // Create module in loader's module entry table, if already exists then
   // return null.  Assume Module_lock has been locked by caller.
   ModuleEntry* locked_create_entry_or_null(Handle module_handle,
+                                           bool is_open,
                                            Symbol* module_name,
                                            Symbol* module_version,
                                            Symbol* module_location,