Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/jvm/bytecode/PutHelper.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
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
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
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.
17 */
18
19 package gov.nasa.jpf.jvm.bytecode;
20
21 import gov.nasa.jpf.vm.ElementInfo;
22 import gov.nasa.jpf.vm.FieldInfo;
23 import gov.nasa.jpf.vm.StackFrame;
24 import gov.nasa.jpf.vm.ThreadInfo;
25
26 /**
27 * helper class to factor out common PUT code
28 *
29 * <2do> This is going to be moved into a Java 8 interface with default methods
30 */
31 public class PutHelper {
32
33 protected static boolean hasNewValue (ThreadInfo ti, StackFrame frame, ElementInfo eiFieldOwner, FieldInfo fi){
34 Object valAttr = null;
35 int fieldSize = fi.getStorageSize();
36
37 if (fieldSize == 1){
38 valAttr = frame.getOperandAttr();
39 int val = frame.peek();
40 if (eiFieldOwner.get1SlotField(fi) != val){
41 return true;
42 }
43
44 } else {
45 valAttr = frame.getLongOperandAttr();
46 long val = frame.peekLong();
47 if (eiFieldOwner.get2SlotField(fi) != val){
48 return true;
49 }
50 }
51
52 if (eiFieldOwner.getFieldAttr(fi) != valAttr){
53 return true;
54 }
55
56 return false;
57 }
58
59 protected static int setReferenceField (ThreadInfo ti, StackFrame frame, ElementInfo eiFieldOwner, FieldInfo fi){
60 Object valAttr = frame.getOperandAttr();
61 int val = frame.peek();
62 eiFieldOwner.set1SlotField(fi, val);
63 eiFieldOwner.setFieldAttr(fi, valAttr);
64 return val;
65 }
66
67 protected static long setField (ThreadInfo ti, StackFrame frame, ElementInfo eiFieldOwner, FieldInfo fi){
68 int fieldSize = fi.getStorageSize();
69
70 if (fieldSize == 1){
71 Object valAttr = frame.getOperandAttr();
72 int val = frame.peek();
73 eiFieldOwner.set1SlotField(fi, val);
74 eiFieldOwner.setFieldAttr(fi, valAttr);
75 return val;
76
77 } else {
78 Object valAttr = frame.getLongOperandAttr();
79 long val = frame.peekLong();
80 eiFieldOwner.set2SlotField(fi, val);
81 eiFieldOwner.setFieldAttr(fi, valAttr);
82 return val;
83 }
84 }
85 }