--- a/hotspot/src/share/vm/oops/markOop.cpp	Mon Feb 16 08:47:39 2015 -0800
+++ b/hotspot/src/share/vm/oops/markOop.cpp	Tue Feb 17 13:54:53 2015 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, 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
@@ -25,17 +25,40 @@
 #include "precompiled.hpp"
 #include "oops/markOop.hpp"
 #include "runtime/thread.inline.hpp"
+#include "runtime/objectMonitor.inline.hpp"
 
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 
 void markOopDesc::print_on(outputStream* st) const {
-  if (is_locked()) {
-    st->print("locked(" INTPTR_FORMAT ")->", value());
-    markOop(*(markOop*)value())->print_on(st);
+  if (is_marked()) {
+    st->print(" marked(" INTPTR_FORMAT ")", value());
+  } else if (is_locked()) {
+    st->print(" locked(" INTPTR_FORMAT ")->", value());
+    if (is_neutral()) {
+      st->print("is_neutral");
+      if (has_no_hash()) st->print(" no_hash");
+      else st->print(" hash=" INTPTR_FORMAT, hash());
+      st->print(" age=%d", age());
+    } else if (has_bias_pattern()) {
+      st->print("is_biased");
+      JavaThread* jt = biased_locker();
+      st->print(" biased_locker=" INTPTR_FORMAT, p2i(jt));
+    } else if (has_monitor()) {
+      ObjectMonitor* mon = monitor();
+      if (mon == NULL)
+        st->print("monitor=NULL");
+      else {
+        BasicLock * bl = (BasicLock *) mon->owner();
+        st->print("monitor={count="INTPTR_FORMAT",waiters="INTPTR_FORMAT",recursions="INTPTR_FORMAT",owner="INTPTR_FORMAT"}",
+                mon->count(), mon->waiters(), mon->recursions(), p2i(bl));
+      }
+    } else {
+      st->print("??");
+    }
   } else {
     assert(is_unlocked() || has_bias_pattern(), "just checking");
     st->print("mark(");
-    if (has_bias_pattern())  st->print("biased,");
+    if (has_bias_pattern()) st->print("biased,");
     st->print("hash %#lx,", hash());
     st->print("age %d)", age());
   }