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Ensure materialized frame is really materialized
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 30 Sep 2015 10:59:40 +0200
parents dc83cc1f94f2
children 71ec6de11cea
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1 /*
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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12 * version 2 for more details (a copy is included in the LICENSE file that
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.api.test;
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24
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25 import com.oracle.truffle.api.CallTarget;
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26 import com.oracle.truffle.api.Truffle;
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27 import com.oracle.truffle.api.TruffleRuntime;
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28 import com.oracle.truffle.api.frame.Frame;
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29 import com.oracle.truffle.api.frame.FrameDescriptor;
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30 import com.oracle.truffle.api.frame.FrameInstance;
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31 import com.oracle.truffle.api.frame.FrameSlot;
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32 import com.oracle.truffle.api.frame.FrameSlotKind;
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33 import com.oracle.truffle.api.frame.FrameSlotTypeException;
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34 import com.oracle.truffle.api.frame.MaterializedFrame;
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35 import com.oracle.truffle.api.frame.VirtualFrame;
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36 import com.oracle.truffle.api.nodes.Node;
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37 import com.oracle.truffle.api.nodes.RootNode;
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38 import org.junit.Assert;
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39 import static org.junit.Assert.assertEquals;
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40 import static org.junit.Assert.assertTrue;
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41 import org.junit.Test;
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42
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43 /**
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44 * <h3>Storing Values in Frame Slots</h3>
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45 *
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46 * <p>
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47 * The frame is the preferred data structure for passing values between nodes. It can in particular
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48 * be used for storing the values of local variables of the guest language. The
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49 * {@link FrameDescriptor} represents the current structure of the frame. The method
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50 * {@link FrameDescriptor#addFrameSlot(Object, FrameSlotKind)} can be used to create predefined
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51 * frame slots. The setter and getter methods in the {@link Frame} class can be used to access the
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52 * current value of a particular frame slot. Values can be removed from a frame via the
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53 * {@link FrameDescriptor#removeFrameSlot(Object)} method.
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54 * </p>
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55 *
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56 * <p>
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57 * There are five primitive types for slots available: {@link java.lang.Boolean},
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58 * {@link java.lang.Integer}, {@link java.lang.Long}, {@link java.lang.Float}, and
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59 * {@link java.lang.Double} . It is encouraged to use those types whenever possible. Dynamically
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60 * typed languages can speculate on the type of a value fitting into a primitive (see
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61 * {@link FrameSlotTypeSpecializationTest}). When a frame slot is of one of those particular
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62 * primitive types, its value may only be accessed with the respectively typed getter method (
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63 * {@link Frame#getBoolean}, {@link Frame#getInt}, {@link Frame#getLong}, {@link Frame#getFloat}, or
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64 * {@link Frame#getDouble}) or setter method ({@link Frame#setBoolean}, {@link Frame#setInt},
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65 * {@link Frame#setLong}, {@link Frame#setFloat}, or {@link Frame#setDouble}) in the {@link Frame}
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66 * class.
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67 * </p>
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68 *
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69 * <p>
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70 * The next part of the Truffle API introduction is at
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71 * {@link com.oracle.truffle.api.test.FrameSlotTypeSpecializationTest}.
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72 * </p>
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73 */
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74 public class FrameTest {
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76 @Test
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77 public void test() {
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78 TruffleRuntime runtime = Truffle.getRuntime();
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79 FrameDescriptor frameDescriptor = new FrameDescriptor();
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80 String varName = "localVar";
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81 FrameSlot slot = frameDescriptor.addFrameSlot(varName, FrameSlotKind.Int);
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82 TestRootNode rootNode = new TestRootNode(frameDescriptor, new AssignLocal(slot), new ReadLocal(slot));
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83 CallTarget target = runtime.createCallTarget(rootNode);
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84 Object result = target.call();
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85 Assert.assertEquals(42, result);
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86 frameDescriptor.removeFrameSlot(varName);
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87 boolean slotMissing = false;
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88 try {
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89 result = target.call();
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90 } catch (IllegalArgumentException iae) {
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91 slotMissing = true;
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92 }
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93 Assert.assertTrue(slotMissing);
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94 }
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95
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96 class TestRootNode extends RootNode {
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97
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98 @Child TestChildNode left;
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99 @Child TestChildNode right;
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100
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101 public TestRootNode(FrameDescriptor descriptor, TestChildNode left, TestChildNode right) {
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102 super(TestingLanguage.class, null, descriptor);
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103 this.left = left;
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104 this.right = right;
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105 }
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106
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107 @Override
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108 public Object execute(VirtualFrame frame) {
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109 return left.execute(frame) + right.execute(frame);
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110 }
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111 }
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112
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113 abstract class TestChildNode extends Node {
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114
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115 public TestChildNode() {
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116 super(null);
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117 }
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118
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119 abstract int execute(VirtualFrame frame);
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120 }
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121
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122 abstract class FrameSlotNode extends TestChildNode {
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123
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124 protected final FrameSlot slot;
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125
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126 public FrameSlotNode(FrameSlot slot) {
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127 this.slot = slot;
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128 }
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129 }
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130
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131 class AssignLocal extends FrameSlotNode {
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132
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133 AssignLocal(FrameSlot slot) {
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134 super(slot);
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135 }
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136
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137 @Override
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138 int execute(VirtualFrame frame) {
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139 frame.setInt(slot, 42);
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140 return 0;
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141 }
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142 }
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143
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144 class ReadLocal extends FrameSlotNode {
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145
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146 ReadLocal(FrameSlot slot) {
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147 super(slot);
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148 }
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149
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150 @Override
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151 int execute(VirtualFrame frame) {
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152 try {
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153 return frame.getInt(slot);
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154 } catch (FrameSlotTypeException e) {
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155 throw new IllegalStateException(e);
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156 }
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157 }
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158 }
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159
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160 @Test
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161 public void framesCanBeMaterialized() {
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162 final TruffleRuntime runtime = Truffle.getRuntime();
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163
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164 class FrameRootNode extends RootNode {
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165
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166 public FrameRootNode() {
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167 super(TestingLanguage.class, null, null);
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168 }
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169
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170 @Override
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171 public Object execute(VirtualFrame frame) {
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172 FrameInstance frameInstance = runtime.getCurrentFrame();
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173 Frame readWrite = frameInstance.getFrame(FrameInstance.FrameAccess.READ_WRITE, true);
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174 Frame materialized = frameInstance.getFrame(FrameInstance.FrameAccess.MATERIALIZE, true);
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175
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176 assertTrue("Really materilized: " + materialized, materialized instanceof MaterializedFrame);
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177 assertEquals("It's my frame", frame, readWrite);
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178 return this;
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179 }
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180 }
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181
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182 FrameRootNode frn = new FrameRootNode();
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183 Object ret = Truffle.getRuntime().createCallTarget(frn).call();
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184 assertEquals("Returns itself", frn, ret);
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185 }
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186 }