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

   1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/shared/specialized_oop_closures.hpp"
  27 #include "oops/access.inline.hpp"
  28 #include "oops/objArrayKlass.hpp"
  29 #include "oops/objArrayOop.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 
  32 oop objArrayOopDesc::atomic_compare_exchange_oop(int index, oop exchange_value,
  33                                                  oop compare_value) {
  34   volatile HeapWord* dest;
  35   if (UseCompressedOops) {
  36     dest = (HeapWord*)obj_at_addr<narrowOop>(index);
  37   } else {
  38     dest = (HeapWord*)obj_at_addr<oop>(index);
  39   }
  40   return HeapAccess<>::oop_atomic_cmpxchg(exchange_value, dest, compare_value);
  41 }
  42 
  43 Klass* objArrayOopDesc::element_klass() {
  44   return ObjArrayKlass::cast(klass())->element_klass();
  45 }
  46 
  47 #define ObjArrayOop_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)                    \
  48                                                                                    \
  49 void objArrayOopDesc::oop_iterate_range(OopClosureType* blk, int start, int end) {  \
  50   ((ObjArrayKlass*)klass())->oop_oop_iterate_range##nv_suffix(this, blk, start, end); \
  51 }
  52 
  53 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayOop_OOP_ITERATE_DEFN)
  54 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayOop_OOP_ITERATE_DEFN)
--- EOF ---