agent/src/share/classes/sun/jvm/hotspot/utilities/HeapGXLWriter.java

rev 146 : [mq]: mixa.layout.patch

*** 174,183 ****
--- 174,184 ----
                  writeAttribute("class-name", "string", name.asString());
              }
              if (isInstanceKlass) {
                  // write object-size as an attribute
                  long sizeInBytes = reflectedType.getLayoutHelper();
+                 sizeInBytes &= ~Bits.rightNBits(Klass.LH_SIZE_LOW_BITS);
                  writeAttribute("object-size", "int",
                                 Long.toString(sizeInBytes));
                  // write static fields of this class.
                  writeObjectFields(reflectedType);
              }