2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0.
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 package gov.nasa.jpf.vm;
22 * base class for atomic field updaters
24 public class AtomicFieldUpdater extends NativePeer {
27 protected FieldInfo getFieldInfo (ElementInfo eiUpdater, ElementInfo eiTarget){
28 int fidx = eiUpdater.getIntField("fieldId");
29 return eiTarget.getClassInfo().getInstanceField(fidx);
33 * note - we are not interested in sharedness/interleaving of the AtomicUpdater object
34 * but in the object that is accessed by the updater
36 protected boolean reschedulesAccess (ThreadInfo ti, ElementInfo ei, FieldInfo fi){
37 Scheduler scheduler = ti.getScheduler();
38 Instruction insn = ti.getPC();
40 if (scheduler.canHaveSharedObjectCG( ti, insn, ei, fi)){
41 ei = scheduler.updateObjectSharedness( ti, ei, fi);
42 return scheduler.setsSharedObjectCG( ti, insn, ei, fi);