--- old/src/share/vm/oops/oop.inline.hpp	2017-06-20 16:28:35.210263052 -0400
+++ new/src/share/vm/oops/oop.inline.hpp	2017-06-20 16:28:34.610260077 -0400
@@ -31,6 +31,7 @@
 #include "gc/shared/collectedHeap.inline.hpp"
 #include "gc/shared/genCollectedHeap.hpp"
 #include "gc/shared/generation.hpp"
+#include "memory/vtBuffer.hpp"
 #include "oops/arrayKlass.hpp"
 #include "oops/arrayOop.hpp"
 #include "oops/klass.inline.hpp"
@@ -547,7 +548,12 @@
 bool oopDesc::is_oop(bool ignore_mark_word) const {
   oop obj = (oop) this;
   if (!check_obj_alignment(obj)) return false;
-  if (!Universe::heap()->is_in_reserved(obj)) return false;
+  if (!Universe::heap()->is_in_reserved(obj)) {
+    assert(obj->klass()->is_value(), "Only value type can be outside of the Java heap");
+    VTBufferChunk* chunk = VTBufferChunk::chunk(obj);
+    assert(chunk->is_valid(), "if not in the heap, should a buffered VT");
+    if (!VTBuffer::is_in_vt_buffer(obj)) return false;
+  }
   // obj is aligned and accessible in heap
   if (Universe::heap()->is_in_reserved(obj->klass_or_null())) return false;
 
@@ -561,7 +567,8 @@
   if (mark() != NULL) {
     return true;
   }
-  return !SafepointSynchronize::is_at_safepoint();
+  return !SafepointSynchronize::is_at_safepoint()
+    || (obj->klass()->is_value() && !Universe::heap()->is_in_reserved(obj)) ;
 }