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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 14991:64dcb92ee75a

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Truffle: Change signature for Truffle calls from (PackedFrame, Arguments) to (Object[]).
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 06 Apr 2014 17:46:24 +0200
parents ba52fbec5b6c
children 1cd02b4d90d1
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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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.nodes;
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26
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27 import java.io.*;
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28 import java.lang.annotation.*;
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29 import java.util.*;
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30 import java.util.concurrent.*;
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31
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32 import com.oracle.truffle.api.*;
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33
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34 /**
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35 * Abstract base class for all Truffle nodes.
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36 */
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37 public abstract class Node implements Cloneable {
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38
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39 private Node parent;
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40
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41 private SourceSection sourceSection;
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42
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43 /**
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44 * Marks array fields that are children of this node.
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45 */
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46 @Retention(RetentionPolicy.RUNTIME)
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47 @Target({ElementType.FIELD})
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48 public @interface Children {
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49 }
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50
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51 /**
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52 * Marks fields that represent child nodes of this node.
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53 */
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54 @Retention(RetentionPolicy.RUNTIME)
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55 @Target({ElementType.FIELD})
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56 public @interface Child {
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57 }
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58
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59 protected Node() {
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60 CompilerAsserts.neverPartOfCompilation();
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61 }
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62
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63 protected Node(SourceSection sourceSection) {
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64 CompilerAsserts.neverPartOfCompilation();
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65 this.sourceSection = sourceSection;
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66 }
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67
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68 /**
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69 * Assigns a link to a guest language source section to this node.
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70 *
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71 * @param section the object representing a section in guest language source code
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72 */
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73 public final void assignSourceSection(SourceSection section) {
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74 if (sourceSection != null) {
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75 // Patch this test during the transition to constructor-based
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76 // source attribution, which would otherwise trigger this
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77 // exception. This method will eventually be deprecated.
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78 if (getSourceSection() != section) {
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79 throw new IllegalStateException("Source section is already assigned. Old: " + getSourceSection() + ", new: " + section);
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80 }
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81 }
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82 this.sourceSection = section;
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83 }
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84
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85 /**
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86 * Returns a rough estimate for the cost of this {@link Node}. This estimate can be used by
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87 * runtime systems or guest languages to implement heuristics based on Truffle ASTs. This method
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88 * is intended to be overridden by subclasses. The default implementation returns the value of
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89 * {@link NodeInfo#cost()} of the {@link NodeInfo} annotation declared at the subclass. If no
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91 * default value.
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92 */
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93 public NodeCost getCost() {
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94 NodeInfo info = getClass().getAnnotation(NodeInfo.class);
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95 if (info != null) {
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96 return info.cost();
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97 }
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98 return NodeCost.MONOMORPHIC;
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99 }
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100
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101 /**
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102 * Clears any previously assigned guest language source code from this node.
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103 */
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104 public final void clearSourceSection() {
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105 this.sourceSection = null;
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106 }
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107
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108 /**
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109 * Retrieves the guest language source code section that is currently assigned to this node.
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110 *
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111 * @return the assigned source code section
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112 */
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113 public final SourceSection getSourceSection() {
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114 return sourceSection;
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115 }
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116
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117 /**
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118 * Retrieves the guest language source code section that is currently assigned to this node.
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119 *
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120 * @return the assigned source code section
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121 */
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122 @CompilerDirectives.SlowPath
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123 public final SourceSection getEncapsulatingSourceSection() {
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124 if (sourceSection == null && getParent() != null) {
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125 return getParent().getEncapsulatingSourceSection();
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126 }
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127 return sourceSection;
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128 }
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129
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130 /**
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131 * Method that updates the link to the parent in the array of specified new child nodes to this
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132 * node.
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133 *
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134 * @param newChildren the array of new children whose parent should be updated
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135 * @return the array of new children
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136 */
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137 @SuppressWarnings("static-method")
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138 @Deprecated
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139 protected final <T extends Node> T[] adoptChildren(final T[] newChildren) {
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140 return newChildren;
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141 }
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142
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143 /**
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144 * Method that updates the link to the parent in the specified new child node to this node.
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145 *
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146 * @param newChild the new child whose parent should be updated
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147 * @return the new child
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148 */
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149 @SuppressWarnings("static-method")
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150 @Deprecated
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151 protected final <T extends Node> T adoptChild(final T newChild) {
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152 return newChild;
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153 }
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154
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155 /**
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156 * Method that updates the link to the parent in the array of specified new child nodes to this
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157 * node.
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158 *
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159 * @param newChildren the array of new children whose parent should be updated
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160 * @return the array of new children
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161 */
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162 protected final <T extends Node> T[] insert(final T[] newChildren) {
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163 CompilerDirectives.transferToInterpreterAndInvalidate();
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164 assert newChildren != null;
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165 for (Node newChild : newChildren) {
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166 adoptHelper(newChild);
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167 }
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168 return newChildren;
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169 }
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170
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171 /**
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172 * Method that updates the link to the parent in the specified new child node to this node.
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173 *
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174 * @param newChild the new child whose parent should be updated
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175 * @return the new child
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176 */
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177 protected final <T extends Node> T insert(final T newChild) {
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178 CompilerDirectives.transferToInterpreterAndInvalidate();
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179 assert newChild != null;
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180 adoptHelper(newChild);
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181 return newChild;
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182 }
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183
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184 public final void adoptChildren() {
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185 CompilerDirectives.transferToInterpreterAndInvalidate();
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186 adoptHelper();
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187 }
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188
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189 private void adoptHelper(final Node newChild) {
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190 assert newChild != null;
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191 if (newChild == this) {
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192 throw new IllegalStateException("The parent of a node can never be the node itself.");
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193 }
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194 newChild.parent = this;
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195 newChild.adoptHelper();
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196 }
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197
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198 private void adoptHelper() {
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199 Iterable<Node> children = this.getChildren();
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200 for (Node child : children) {
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201 if (child != null && child.getParent() != this) {
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202 this.adoptHelper(child);
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203 }
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204 }
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205 }
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206
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207 private void adoptUnadoptedHelper(final Node newChild) {
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208 assert newChild != null;
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209 if (newChild == this) {
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210 throw new IllegalStateException("The parent of a node can never be the node itself.");
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211 }
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212 newChild.parent = this;
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213 newChild.adoptUnadoptedHelper();
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214 }
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215
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216 private void adoptUnadoptedHelper() {
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217 Iterable<Node> children = this.getChildren();
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218 for (Node child : children) {
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219 if (child != null && child.getParent() == null) {
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220 this.adoptUnadoptedHelper(child);
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221 }
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222 }
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223 }
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224
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225 /**
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226 * Returns properties of this node interesting for debugging and can be overwritten by
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227 * subclasses to add their own custom properties.
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228 *
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229 * @return the properties as a key/value hash map
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230 */
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231 public Map<String, Object> getDebugProperties() {
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232 Map<String, Object> properties = new HashMap<>();
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233 return properties;
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234 }
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235
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236 /**
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237 * The current parent node of this node.
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238 *
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239 * @return the parent node
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240 */
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241 public final Node getParent() {
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242 return parent;
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243 }
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244
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245 /**
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246 * Replaces this node with another node. If there is a source section (see
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247 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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248 *
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249 * @param newNode the new node that is the replacement
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250 * @param reason a description of the reason for the replacement
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251 * @return the new node
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252 */
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253 public final <T extends Node> T replace(final T newNode, final CharSequence reason) {
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254 CompilerDirectives.transferToInterpreterAndInvalidate();
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255 atomic(new Runnable() {
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256 public void run() {
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257 replaceHelper(newNode, reason);
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258 }
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259 });
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260 return newNode;
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261 }
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262
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263 /**
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264 * Replaces this node with another node. If there is a source section (see
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265 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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266 *
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267 * @param newNode the new node that is the replacement
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268 * @return the new node
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269 */
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270 public final <T extends Node> T replace(T newNode) {
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271 return replace(newNode, "");
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272 }
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273
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274 private void replaceHelper(Node newNode, CharSequence reason) {
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275 CompilerAsserts.neverPartOfCompilation();
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276 if (this.getParent() == null) {
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277 throw new IllegalStateException("This node cannot be replaced, because it does not yet have a parent.");
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278 }
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279 if (sourceSection != null && newNode.getSourceSection() == null) {
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280 // Pass on the source section to the new node.
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281 newNode.assignSourceSection(sourceSection);
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282 }
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283 // (aw) need to set parent *before* replace, so that (unsynchronized) getRootNode()
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284 // will always find the root node
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285 newNode.parent = this.parent;
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286 if (NodeUtil.replaceChild(this.parent, this, newNode)) {
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287 this.parent.adoptHelper(newNode);
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288 } else {
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289 this.parent.adoptUnadoptedHelper(newNode);
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290 }
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291 reportReplace(this, newNode, reason);
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292 onReplace(newNode, reason);
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293 }
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294
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295 /**
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296 * Checks if this node is properly adopted by a parent and can be replaced.
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297 *
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298 * @return {@code true} if it is safe to replace this node.
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299 */
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300 public final boolean isReplaceable() {
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301 if (getParent() != null) {
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302 for (Node sibling : getParent().getChildren()) {
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303 if (sibling == this) {
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304 return true;
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305 }
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306 }
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307 }
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308 return false;
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309 }
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310
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311 private void reportReplace(Node oldNode, Node newNode, CharSequence reason) {
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312 RootNode rootNode = getRootNode();
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313 if (rootNode != null) {
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314 CallTarget target = rootNode.getCallTarget();
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315 if (target instanceof ReplaceObserver) {
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316 ((ReplaceObserver) target).nodeReplaced(oldNode, newNode, reason);
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317 }
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318 }
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319 }
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320
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321 /**
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322 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the
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323 * node is rewritten. This method is invoked before the actual replace has happened.
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 14629
diff changeset
324 *
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parents: 9256
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325 * @param newNode the replacement node
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parents: 9256
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326 * @param reason the reason the replace supplied
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
327 */
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Andreas Woess <andreas.woess@jku.at>
parents: 14566
diff changeset
328 protected void onReplace(Node newNode, CharSequence reason) {
12692
ffd4b6b4ae68 Truffle Node class refactoring.
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parents: 12495
diff changeset
329 if (TruffleOptions.TraceRewrites) {
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
330 traceRewrite(newNode, reason);
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
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331 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
332 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
333
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Andreas Woess <andreas.woess@jku.at>
parents: 14566
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334 private void traceRewrite(Node newNode, CharSequence reason) {
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
335
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diff changeset
336 if (TruffleOptions.TraceRewritesFilterFromCost != null) {
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
337 if (filterByKind(this, TruffleOptions.TraceRewritesFilterFromCost)) {
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
338 return;
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8c570011b86f Truffle: when a node is replaced, notify optimized call target and delay compilation.
Andreas Woess <andreas.woess@jku.at>
parents: 10846
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339 }
8c570011b86f Truffle: when a node is replaced, notify optimized call target and delay compilation.
Andreas Woess <andreas.woess@jku.at>
parents: 10846
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340 }
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parents: 10481
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341
14564
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342 if (TruffleOptions.TraceRewritesFilterToCost != null) {
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
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343 if (filterByKind(newNode, TruffleOptions.TraceRewritesFilterToCost)) {
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
344 return;
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
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parents: 10481
diff changeset
345 }
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
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346 }
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diff changeset
347
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Andreas Woess <andreas.woess@jku.at>
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348 String filter = TruffleOptions.TraceRewritesFilterClass;
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349 Class<? extends Node> from = getClass();
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350 Class<? extends Node> to = newNode.getClass();
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Andreas Woess <andreas.woess@jku.at>
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351 if (filter != null && (filterByContainsClassName(from, filter) || filterByContainsClassName(to, filter))) {
ffd4b6b4ae68 Truffle Node class refactoring.
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352 return;
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Christian Humer <christian.humer@gmail.com>
parents: 10481
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353 }
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Andreas Woess <andreas.woess@jku.at>
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354
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
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355 PrintStream out = System.out;
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356 out.printf("[truffle] rewrite %-50s |From %-40s |To %-40s |Reason %s.%n", this.toString(), formatNodeInfo(this), formatNodeInfo(newNode), reason);
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parents: 10481
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357 }
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
358
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parents: 14073
diff changeset
359 private static String formatNodeInfo(Node node) {
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
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360 String cost = "?";
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
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diff changeset
361 switch (node.getCost()) {
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362 case NONE:
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363 cost = "G";
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parents: 14073
diff changeset
364 break;
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Christian Humer <christian.humer@gmail.com>
parents: 14073
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365 case MONOMORPHIC:
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366 cost = "M";
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Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
367 break;
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
368 case POLYMORPHIC:
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Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
369 cost = "P";
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Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
370 break;
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parents: 14073
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371 case MEGAMORPHIC:
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diff changeset
372 cost = "G";
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Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
373 break;
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Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
374 default:
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
375 cost = "?";
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
376 break;
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
377 }
14564
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
378 return cost + " " + node.getClass().getSimpleName();
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
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parents: 10481
diff changeset
379 }
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
380
14564
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
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parents: 14073
diff changeset
381 private static boolean filterByKind(Node node, NodeCost cost) {
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diff changeset
382 return node.getCost() == cost;
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parents: 10481
diff changeset
383 }
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
384
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
385 private static boolean filterByContainsClassName(Class<? extends Node> from, String filter) {
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
386 Class<?> currentFrom = from;
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
387 while (currentFrom != null) {
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
388 if (currentFrom.getName().contains(filter)) {
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
389 return false;
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
390 }
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
391 currentFrom = currentFrom.getSuperclass();
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
392 }
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
393 return true;
9782
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
394 }
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
395
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
396 /**
7530
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parents: 7267
diff changeset
397 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all
5e3d1a68664e applied mx eclipseformat to all Java files
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parents: 7267
diff changeset
398 * child nodes.
14991
64dcb92ee75a Truffle: Change signature for Truffle calls from (PackedFrame, Arguments) to (Object[]).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 14629
diff changeset
399 *
7267
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diff changeset
400 * @param nodeVisitor the visitor
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
401 */
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diff changeset
402 public final void accept(NodeVisitor nodeVisitor) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
403 if (nodeVisitor.visit(this)) {
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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parents:
diff changeset
404 for (Node child : this.getChildren()) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
405 if (child != null) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
406 child.accept(nodeVisitor);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
407 }
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
408 }
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
409 }
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
410 }
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
411
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
412 /**
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
413 * Iterator over the children of this node.
14991
64dcb92ee75a Truffle: Change signature for Truffle calls from (PackedFrame, Arguments) to (Object[]).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 14629
diff changeset
414 *
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
415 * @return the iterator
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
416 */
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
417 public final Iterable<Node> getChildren() {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
418 final Node node = this;
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diff changeset
419 return new Iterable<Node>() {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
420
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
421 public Iterator<Node> iterator() {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
422 return new NodeUtil.NodeIterator(node);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
423 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
424 };
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
425 }
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
426
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
427 /**
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
428 * Creates a shallow copy of this node.
14991
64dcb92ee75a Truffle: Change signature for Truffle calls from (PackedFrame, Arguments) to (Object[]).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 14629
diff changeset
429 *
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diff changeset
430 * @return the new copy
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diff changeset
431 */
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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432 public Node copy() {
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433 try {
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434 return (Node) super.clone();
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435 } catch (CloneNotSupportedException e) {
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436 return null;
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437 }
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438 }
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439
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440 /**
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441 * This method must never be called. It enforces that {@link Object#clone} is not directly
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442 * called by subclasses. Use the {@link #copy()} method instead.
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443 */
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444 @Override
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445 @Deprecated
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446 protected final Object clone() throws CloneNotSupportedException {
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447 throw new IllegalStateException("This method should never be called, use the copy method instead!");
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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448 }
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449
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450 /**
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451 * Get the root node of the tree a node belongs to.
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452 *
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453 * @return the {@link RootNode} or {@code null} if there is none.
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454 */
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455 public final RootNode getRootNode() {
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456 Node rootNode = this;
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457 while (rootNode.getParent() != null) {
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458 assert !(rootNode instanceof RootNode) : "root node must not have a parent";
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459 rootNode = rootNode.getParent();
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460 }
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461 if (rootNode instanceof RootNode) {
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462 return (RootNode) rootNode;
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463 }
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464 return null;
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465 }
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466
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467 /**
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468 * Converts this node to a textual representation useful for debugging.
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469 */
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470 @Override
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471 public String toString() {
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472 StringBuilder sb = new StringBuilder(getClass().getSimpleName());
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473 Map<String, Object> properties = getDebugProperties();
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474 boolean hasProperties = false;
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475 for (Map.Entry<String, Object> entry : properties.entrySet()) {
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476 sb.append(hasProperties ? "," : "<");
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477 hasProperties = true;
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478 sb.append(entry.getKey()).append("=").append(entry.getValue());
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479 }
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480 if (hasProperties) {
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481 sb.append(">");
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482 }
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483 sb.append("@").append(Integer.toHexString(hashCode()));
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484 return sb.toString();
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485 }
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486
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487 public final void atomic(Runnable closure) {
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488 RootNode rootNode = getRootNode();
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489 if (rootNode != null) {
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490 synchronized (rootNode) {
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491 closure.run();
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492 }
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493 } else {
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494 closure.run();
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495 }
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496 }
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497
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498 public final <T> T atomic(Callable<T> closure) {
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499 try {
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500 RootNode rootNode = getRootNode();
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501 if (rootNode != null) {
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502 synchronized (rootNode) {
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503 return closure.call();
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504 }
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505 } else {
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506 return closure.call();
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507 }
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508 } catch (RuntimeException e) {
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509 throw e;
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510 } catch (Exception e) {
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511 throw new RuntimeException(e);
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512 }
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513 }
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514 }