src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ObjectMonitor.java

@@ -77,10 +77,14 @@
        return true;
      }
      return false;
    }
  
+   public boolean isOwnedAnonymous() {
+     return addr.getAddressAt(ownerFieldOffset).asLongValue() == 1;
+   }
+ 
    public Address owner() { return addr.getAddressAt(ownerFieldOffset); }
    // FIXME
    //  void      set_owner(void* owner);
  
    public int    waiters() { return (int)waitersField.getValue(this); }