src/share/vm/classfile/javaClasses.cpp

rev 11483 : [mq]: webrev.01

@@ -869,16 +869,20 @@
   java_lang_Class::set_module(k->java_mirror(), module());
 }
 
 int  java_lang_Class::oop_size(oop java_class) {
   assert(_oop_size_offset != 0, "must be set");
-  return java_class->int_field(_oop_size_offset);
+  int size = java_class->int_field(_oop_size_offset);
+  assert(size > 0, "size not set or stomped on: %d", size);
+  return size;
 }
 void java_lang_Class::set_oop_size(oop java_class, int size) {
   assert(_oop_size_offset != 0, "must be set");
+  assert(size > 0, "total object size must be positive: %d", size);
   java_class->int_field_put(_oop_size_offset, size);
 }
+
 int  java_lang_Class::static_oop_field_count(oop java_class) {
   assert(_static_oop_field_count_offset != 0, "must be set");
   return java_class->int_field(_static_oop_field_count_offset);
 }
 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {