--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/peers/gov/nasa/jpf/vm/JPF_java_util_concurrent_atomic_AtomicReferenceFieldUpdater.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+
+package gov.nasa.jpf.vm;
+
+import gov.nasa.jpf.annotation.MJI;
+
+
+/**
+ * a full peer for the AtomicReferenceFieldUpdater
+ */
+public class JPF_java_util_concurrent_atomic_AtomicReferenceFieldUpdater extends AtomicFieldUpdater {
+
+  @MJI
+  public void $init__Ljava_lang_Class_2Ljava_lang_Class_2Ljava_lang_String_2__V (MJIEnv env, int objRef,
+                                 int tClsObjRef, int fClsObjRef, int fNameRef) {
+
+    // direct Object subclass, so we don't have to call a super ctor
+
+    ClassInfo ci = env.getReferredClassInfo(tClsObjRef);
+    String fname = env.getStringObject(fNameRef);
+    FieldInfo fi = ci.getInstanceField(fname);
+
+    ClassInfo fci = fi.getTypeClassInfo();
+
+    ClassInfo fciCheck = env.getReferredClassInfo( fClsObjRef);
+    if (!fci.isInstanceOf(fciCheck)) {
+      // that's also just an approximation, but we need to check
+      env.throwException("java.lang.RuntimeException", "wrong field type");
+    }
+
+    int fidx = fi.getFieldIndex();
+    env.setIntField(objRef, "fieldId", fidx);
+  }
+
+  @MJI
+  public boolean compareAndSet__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2__Z
+                                  (MJIEnv env, int objRef, int tRef, int fExpect, int fUpdate){
+
+    if (tRef == MJIEnv.NULL){
+      env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
+      return false;
+    }
+    
+    ThreadInfo ti = env.getThreadInfo();
+    ElementInfo ei = ti.getModifiableElementInfo(tRef);
+    FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
+
+    if (reschedulesAccess(ti, ei, fi)){
+      env.repeatInvocation();
+      return false;
+    }
+
+    int v = ei.getReferenceField(fi);
+    if (v == fExpect) {
+      ei.setReferenceField(fi, fUpdate);
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  @MJI
+  public boolean weakCompareAndSet__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2__Z
+  (MJIEnv env, int objRef, int tRef, int fExpect, int fUpdate){
+    return(compareAndSet__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2__Z(env, objRef, tRef, fExpect, fUpdate));
+  }
+
+  @MJI
+  public void set__Ljava_lang_Object_2Ljava_lang_Object_2__V (MJIEnv env, int objRef, int tRef, int fNewValue){
+
+    if (tRef == MJIEnv.NULL){
+      env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
+      return;
+    }
+    
+    ThreadInfo ti = env.getThreadInfo();
+    ElementInfo ei = ti.getModifiableElementInfo(tRef);
+    FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
+
+    if (reschedulesAccess(ti, ei, fi)){
+      env.repeatInvocation();
+      return;
+    }
+
+    ei.setReferenceField(fi, fNewValue);
+  }
+
+  @MJI
+  public void lazySet__Ljava_lang_Object_2Ljava_lang_Object_2__V (MJIEnv env, int objRef, int tRef, int fNewValue){
+     set__Ljava_lang_Object_2Ljava_lang_Object_2__V(env, objRef, tRef, fNewValue);
+  }
+
+  @MJI
+  public int get__Ljava_lang_Object_2__Ljava_lang_Object_2 (MJIEnv env, int objRef, int tRef){
+    if (tRef == MJIEnv.NULL){
+      env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
+      return MJIEnv.NULL;
+    }
+    
+    ThreadInfo ti = env.getThreadInfo();
+    ElementInfo ei = ti.getElementInfo(tRef);
+    FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
+
+    if (reschedulesAccess(ti, ei, fi)){
+      env.repeatInvocation();
+      return MJIEnv.NULL;
+    }
+
+    return ei.getReferenceField(fi);
+  }
+
+  @MJI
+  public int getAndSet__Ljava_lang_Object_2Ljava_lang_Object_2__Ljava_lang_Object_2 (MJIEnv env, int objRef, int tRef, int fNewValue){
+    if (tRef == MJIEnv.NULL){
+      env.throwException("java.lang.NullPointerException", "AtomicFieldUpdater called on null object");
+      return MJIEnv.NULL;
+    }
+    
+    ThreadInfo ti = env.getThreadInfo();
+    ElementInfo ei = ti.getElementInfo(tRef);
+    FieldInfo fi = getFieldInfo( ti.getElementInfo(objRef), ei);
+
+    if (reschedulesAccess(ti, ei, fi)){
+      env.repeatInvocation();
+      return MJIEnv.NULL;
+    }
+    
+    int result = ei.getReferenceField(fi);
+    ei.setReferenceField(fi, fNewValue);
+
+    return result;
+  }
+}