src/hotspot/share/oops/objArrayOop.cpp

rev 49674 : 8201442: objArrayOopDesc::atomic_compare_exchange_oop() must use obj+offset in HeapAccess call

@@ -29,17 +29,17 @@
 #include "oops/objArrayOop.inline.hpp"
 #include "oops/oop.inline.hpp"
 
 oop objArrayOopDesc::atomic_compare_exchange_oop(int index, oop exchange_value,
                                                  oop compare_value) {
-  volatile HeapWord* dest;
+  ptrdiff_t offs;
   if (UseCompressedOops) {
-    dest = (HeapWord*)obj_at_addr<narrowOop>(index);
+    offs = objArrayOopDesc::obj_at_offset<narrowOop>(index);
   } else {
-    dest = (HeapWord*)obj_at_addr<oop>(index);
+    offs = objArrayOopDesc::obj_at_offset<oop>(index);
   }
-  return HeapAccess<>::oop_atomic_cmpxchg(exchange_value, dest, compare_value);
+  return HeapAccess<>::oop_atomic_cmpxchg_at(exchange_value, as_oop(), offs, compare_value);
 }
 
 Klass* objArrayOopDesc::element_klass() {
   return ObjArrayKlass::cast(klass())->element_klass();
 }