Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/listener/OverlappingMethodAnalyzer.java @ 0:61d41facf527

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author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 package gov.nasa.jpf.listener;
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20
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21 import gov.nasa.jpf.Config;
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22 import gov.nasa.jpf.JPF;
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23 import gov.nasa.jpf.vm.ElementInfo;
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24 import gov.nasa.jpf.vm.MethodInfo;
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25 import gov.nasa.jpf.vm.ThreadInfo;
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26
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27 import java.io.PrintWriter;
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28 import java.util.ArrayDeque;
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29 import java.util.Deque;
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30 import java.util.HashMap;
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31 import java.util.Iterator;
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32 import java.util.Map;
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33
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34 /**
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35 * this is a specialized MethodAnalyzer that looks for overlapping method
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36 * calls on the same object from different threads.
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37 *
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38 * <2do> transition reporting does not work yet
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39 */
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40 public class OverlappingMethodAnalyzer extends MethodAnalyzer {
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41
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42 public OverlappingMethodAnalyzer (Config config, JPF jpf){
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43 super(config,jpf);
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44 }
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45
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46 MethodOp getReturnOp (MethodOp op, boolean withinSameThread){
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47 MethodInfo mi = op.mi;
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48 int stateId = op.stateId;
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49 int stackDepth = op.stackDepth;
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50 ElementInfo ei = op.ei;
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51 ThreadInfo ti = op.ti;
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52
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53 for (MethodOp o = op.p; o != null; o = o.p){
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54 if (withinSameThread && o.ti != ti){
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55 break;
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56 }
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57
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58 if ((o.mi == mi) && (o.ti == ti) && (o.stackDepth == stackDepth) && (o.ei == ei)){
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59 return o;
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60 }
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61 }
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62
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63 return null;
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64 }
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65
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66 // check if there is an open exec from another thread for the same ElementInfo
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67 boolean isOpenExec (HashMap<ThreadInfo,Deque<MethodOp>> openExecs, MethodOp op){
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68 ThreadInfo ti = op.ti;
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69 ElementInfo ei = op.ei;
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70
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71 for (Map.Entry<ThreadInfo, Deque<MethodOp>> e : openExecs.entrySet()) {
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72 if (e.getKey() != ti) {
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73 Deque<MethodOp> s = e.getValue();
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74 for (Iterator<MethodOp> it = s.descendingIterator(); it.hasNext();) {
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75 MethodOp o = it.next();
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76 if (o.ei == ei) {
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77 return true;
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78 }
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79 }
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80 }
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81 }
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82
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83 return false;
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84 }
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85
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86 // clean up (if necessary) - both RETURNS and exceptions
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87 void cleanUpOpenExec (HashMap<ThreadInfo,Deque<MethodOp>> openExecs, MethodOp op){
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88 ThreadInfo ti = op.ti;
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89 int stackDepth = op.stackDepth;
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90
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91 Deque<MethodOp> stack = openExecs.get(ti);
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92 if (stack != null && !stack.isEmpty()) {
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93 for (MethodOp o = stack.peek(); o != null && o.stackDepth >= stackDepth; o = stack.peek()) {
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94 stack.pop();
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95 }
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96 }
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97 }
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98
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99 void addOpenExec (HashMap<ThreadInfo,Deque<MethodOp>> openExecs, MethodOp op){
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100 ThreadInfo ti = op.ti;
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101 Deque<MethodOp> stack = openExecs.get(ti);
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102
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103 if (stack == null){
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104 stack = new ArrayDeque<MethodOp>();
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105 stack.push(op);
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106 openExecs.put(ti, stack);
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107
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108 } else {
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109 stack.push(op);
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110 }
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111 }
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112
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113 @Override
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114 void printOn (PrintWriter pw) {
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115 MethodOp start = firstOp;
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116
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117 HashMap<ThreadInfo,Deque<MethodOp>> openExecs = new HashMap<ThreadInfo,Deque<MethodOp>>();
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118
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119 int lastStateId = -1;
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120 int lastTid = start.ti.getId();
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121
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122 for (MethodOp op = start; op != null; op = op.p) {
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123
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124 cleanUpOpenExec(openExecs, op);
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125
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126 if (op.isMethodEnter()) { // EXEC or CALL_EXEC
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127 MethodOp retOp = getReturnOp(op, true);
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128 if (retOp != null) { // completed, skip
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129 if (!isOpenExec(openExecs, op)) {
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130 op = retOp;
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131 lastStateId = op.stateId;
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132 continue;
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133 }
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134 } else { // this is an open method exec, record it
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135 addOpenExec(openExecs, op);
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136 }
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137 }
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138
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139 op = consolidateOp(op);
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140
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141 if (showTransition) {
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142 if (op.stateId != lastStateId) {
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143 if (lastStateId >= 0){
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144 pw.print("------------------------------------------ #");
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
145 pw.println(lastStateId);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
146 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
147 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
148 lastStateId = op.stateId;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
149
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
150 } else {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
151 int tid = op.ti.getId();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
152 if (tid != lastTid) {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
153 lastTid = tid;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
154 pw.println("------------------------------------------");
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
155 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
156 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
157
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
158 op.printOn(pw, this);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
159 pw.println();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
160 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
161 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
162
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
163 MethodOp consolidateOp (MethodOp op){
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
164 for (MethodOp o = op.p; o != null; o = o.p){
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
165 if (showTransition && (o.stateId != op.stateId)){
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
166 break;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
167 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
168 if (o.isSameMethod(op)){
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
169 switch (o.type) {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
170 case RETURN:
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
171 switch (op.type){
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
172 case CALL_EXECUTE:
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
173 op = o.clone(OpType.CALL_EXEC_RETURN); break;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
174 case EXECUTE:
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
175 op = o.clone(OpType.EXEC_RETURN); break;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
176 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
177 break;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
178 case EXEC_RETURN:
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
179 switch (op.type){
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
180 case CALL:
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
181 op = o.clone(OpType.CALL_EXEC_RETURN); break;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
182 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
183 break;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
184 case CALL_EXECUTE: // simple loop
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
185 switch (op.type){
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
186 case CALL_EXEC_RETURN:
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
187 op = o;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
188 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
189 break;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
190 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
191 } else {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
192 break;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
193 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
194 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
195
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
196 return op;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
197 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
198 }