--- a/hotspot/src/share/vm/memory/metaspaceShared.cpp	Fri Apr 08 12:26:29 2016 -0700
+++ b/hotspot/src/share/vm/memory/metaspaceShared.cpp	Thu Apr 07 22:03:04 2016 -0700
@@ -59,6 +59,8 @@
 bool MetaspaceShared::_check_classes_made_progress;
 bool MetaspaceShared::_has_error_classes;
 bool MetaspaceShared::_archive_loading_failed = false;
+address MetaspaceShared::_cds_i2i_entry_code_buffers = NULL;
+size_t MetaspaceShared::_cds_i2i_entry_code_buffers_size = 0;
 SharedMiscRegion MetaspaceShared::_mc;
 SharedMiscRegion MetaspaceShared::_md;
 
@@ -129,6 +131,21 @@
   soc->do_tag(666);
 }
 
+address MetaspaceShared::cds_i2i_entry_code_buffers(size_t total_size) {
+  if (DumpSharedSpaces) {
+    if (_cds_i2i_entry_code_buffers == NULL) {
+      _cds_i2i_entry_code_buffers = (address)misc_data_space_alloc(total_size);
+      _cds_i2i_entry_code_buffers_size = total_size;
+    }
+  } else if (UseSharedSpaces) {
+    assert(_cds_i2i_entry_code_buffers != NULL, "must already been initialized");
+  } else {
+    return NULL;
+  }
+
+  assert(_cds_i2i_entry_code_buffers_size == total_size, "must not change");
+  return _cds_i2i_entry_code_buffers;
+}
 
 // CDS code for dumping shared archive.
 
@@ -576,6 +593,8 @@
                                      &md_top, md_end,
                                      &mc_top, mc_end);
 
+  guarantee(md_top <= md_end, "Insufficient space for vtables.");
+
   // Reorder the system dictionary.  (Moving the symbols affects
   // how the hash table indices are calculated.)
   // Not doing this either.
@@ -668,6 +687,8 @@
   FileMapInfo* mapinfo = new FileMapInfo();
   mapinfo->populate_header(MetaspaceShared::max_alignment());
   mapinfo->set_misc_data_patching_start((char*)vtbl_list);
+  mapinfo->set_cds_i2i_entry_code_buffers(MetaspaceShared::cds_i2i_entry_code_buffers());
+  mapinfo->set_cds_i2i_entry_code_buffers_size(MetaspaceShared::cds_i2i_entry_code_buffers_size());
 
   for (int pass=1; pass<=2; pass++) {
     if (pass == 1) {
@@ -686,7 +707,7 @@
     mapinfo->write_region(MetaspaceShared::md, _md_vs.low(),
                           pointer_delta(md_top, _md_vs.low(), sizeof(char)),
                           SharedMiscDataSize,
-                          false, false);
+                          false, true);
     mapinfo->write_region(MetaspaceShared::mc, _mc_vs.low(),
                           pointer_delta(mc_top, _mc_vs.low(), sizeof(char)),
                           SharedMiscCodeSize,
@@ -980,6 +1001,11 @@
   return UseSharedSpaces && FileMapInfo::current_info()->is_in_shared_space(p);
 }
 
+// Return true if given address is in the misc data region
+bool MetaspaceShared::is_in_shared_region(const void* p, int idx) {
+  return UseSharedSpaces && FileMapInfo::current_info()->is_in_shared_region(p, idx);
+}
+
 bool MetaspaceShared::is_string_region(int idx) {
   return (idx >= MetaspaceShared::first_string &&
           idx < MetaspaceShared::first_string + MetaspaceShared::max_strings);
@@ -1053,6 +1079,8 @@
 
 void MetaspaceShared::initialize_shared_spaces() {
   FileMapInfo *mapinfo = FileMapInfo::current_info();
+  _cds_i2i_entry_code_buffers = mapinfo->cds_i2i_entry_code_buffers();
+  _cds_i2i_entry_code_buffers_size = mapinfo->cds_i2i_entry_code_buffers_size();
   char* buffer = mapinfo->misc_data_patching_start();
 
   // Skip over (reserve space for) a list of addresses of C++ vtables