--- a/hotspot/src/share/vm/prims/jvmtiEnv.cpp	Thu Apr 25 03:58:53 2013 -0700
+++ b/hotspot/src/share/vm/prims/jvmtiEnv.cpp	Thu Apr 25 12:55:49 2013 -0700
@@ -259,7 +259,8 @@
       // bytes to the InstanceKlass here because they have not been
       // validated and we're not at a safepoint.
       constantPoolHandle  constants(current_thread, ikh->constants());
-      MonitorLockerEx ml(constants->lock());    // lock constant pool while we query it
+      oop cplock = constants->lock();
+      ObjectLocker ol(cplock, current_thread, cplock != NULL);    // lock constant pool while we query it
 
       JvmtiClassFileReconstituter reconstituter(ikh);
       if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
@@ -2417,7 +2418,8 @@
 
   instanceKlassHandle ikh(thread, k_oop);
   constantPoolHandle  constants(thread, ikh->constants());
-  MonitorLockerEx ml(constants->lock());    // lock constant pool while we query it
+  oop cplock = constants->lock();
+  ObjectLocker ol(cplock, thread, cplock != NULL);    // lock constant pool while we query it
 
   JvmtiConstantPoolReconstituter reconstituter(ikh);
   if (reconstituter.get_error() != JVMTI_ERROR_NONE) {