--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/jvm/bytecode/PUTSTATIC.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,132 @@
+/*
+ * 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.jvm.bytecode;
+
+import gov.nasa.jpf.util.InstructionState;
+import gov.nasa.jpf.vm.ClassInfo;
+import gov.nasa.jpf.vm.ElementInfo;
+import gov.nasa.jpf.vm.FieldInfo;
+import gov.nasa.jpf.vm.Instruction;
+import gov.nasa.jpf.vm.LoadOnJPFRequired;
+import gov.nasa.jpf.vm.MJIEnv;
+import gov.nasa.jpf.vm.Scheduler;
+import gov.nasa.jpf.vm.StackFrame;
+import gov.nasa.jpf.vm.ThreadInfo;
+import gov.nasa.jpf.vm.bytecode.WriteInstruction;
+
+
+/**
+ * Set static field in class
+ * ..., value => ...
+ */
+public class PUTSTATIC extends JVMStaticFieldInstruction implements WriteInstruction {
+
+  public PUTSTATIC(String fieldName, String clsDescriptor, String fieldDescriptor){
+    super(fieldName, clsDescriptor, fieldDescriptor);
+  }
+
+  /**
+   * where do we get the value from?
+   * NOTE: only makes sense in a executeInstruction() context 
+   */
+  @Override
+  public int getValueSlot (StackFrame frame){
+    return frame.getTopPos();
+  }
+    
+  @Override
+  public Instruction execute (ThreadInfo ti) {
+    StackFrame frame = ti.getModifiableTopFrame();
+    FieldInfo fieldInfo;
+    
+    //--- check if this causes a class load by a user defined classloader
+    try {
+      fieldInfo = getFieldInfo();
+    } catch (LoadOnJPFRequired lre) {
+      return ti.getPC();
+    }
+    
+    if (fieldInfo == null) {
+      return ti.createAndThrowException("java.lang.NoSuchFieldError", (className + '.' + fname));
+    }
+
+    //--- check if this has to trigger class initialization
+    ClassInfo ciField = fieldInfo.getClassInfo();
+    if (!mi.isClinit(ciField) && ciField.pushRequiredClinits(ti)) {
+      return ti.getPC(); // this returns the next insn in the topmost clinit that just got pushed
+    }
+    ElementInfo eiFieldOwner = ciField.getModifiableStaticElementInfo();
+
+    //--- check scheduling point due to shared class access
+    Scheduler scheduler = ti.getScheduler();
+    if (scheduler.canHaveSharedClassCG( ti, this, eiFieldOwner, fieldInfo)){
+      eiFieldOwner = scheduler.updateClassSharedness(ti, eiFieldOwner, fi);
+      if (scheduler.setsSharedClassCG( ti, this, eiFieldOwner, fieldInfo)){
+        return this; // re-execute
+      }
+    }
+    
+    // check if this gets re-executed from a exposure CG (which already did the assignment
+    if (frame.getAndResetFrameAttr(InstructionState.class) == null){
+      lastValue = PutHelper.setField(ti, frame, eiFieldOwner, fieldInfo);
+    }
+      
+    //--- check scheduling point due to exposure through shared class
+    if (isReferenceField()){
+      int refValue = frame.peek();
+      if (refValue != MJIEnv.NULL){
+        ElementInfo eiExposed = ti.getElementInfo(refValue);
+        if (scheduler.setsSharedClassExposureCG(ti,this,eiFieldOwner,fieldInfo,eiExposed)){
+          frame.addFrameAttr( InstructionState.processed);
+          return this; // re-execute AFTER assignment
+        }
+      }        
+    }
+    
+    popOperands(frame);      
+    return getNext();
+  }
+  
+  protected void popOperands (StackFrame frame){
+    if (size == 1){
+      frame.pop(); // .. val => ..
+    } else {
+      frame.pop(2);  // .. highVal, lowVal => ..
+    }
+  }
+  
+  @Override
+  public int getLength() {
+    return 3; // opcode, index1, index2
+  }
+
+  @Override
+  public int getByteCode () {
+    return 0xB3;
+  }
+
+  @Override
+  public boolean isRead() {
+    return false;
+  }
+  
+  @Override
+  public void accept(JVMInstructionVisitor insVisitor) {
+	  insVisitor.visit(this);
+  }
+}