Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 19979:f792b4270cb1
Truffle: simplify inAtomicBlock assertion.
author | Christian Humer <christian.humer@oracle.com> |
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date | Fri, 20 Mar 2015 19:00:50 +0100 |
parents | cd59085cf0d8 |
children | 8dc73c226c63 |
rev | line source |
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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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1 /* |
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2 * Copyright (c) 2012, 2015, 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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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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4 * |
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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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5 * This code is free software; you can redistribute it and/or modify it |
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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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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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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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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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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>
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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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>
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13 * 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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14 * version 2 for more details (a copy is included in the LICENSE file that |
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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>
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15 * accompanied this code). |
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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>
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16 * |
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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>
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17 * You should have received a copy of the GNU General Public License version |
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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>
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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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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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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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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24 */ |
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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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25 package com.oracle.truffle.api.nodes; |
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26 |
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27 import java.lang.annotation.*; |
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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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28 import java.util.*; |
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29 import java.util.concurrent.*; |
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30 |
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31 import com.oracle.truffle.api.*; |
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32 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal; |
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33 import com.oracle.truffle.api.instrument.*; |
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34 import com.oracle.truffle.api.instrument.ProbeNode.WrapperNode; |
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35 import com.oracle.truffle.api.source.*; |
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36 import com.oracle.truffle.api.utilities.*; |
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37 |
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38 /** |
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39 * Abstract base class for all Truffle nodes. |
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40 */ |
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41 public abstract class Node implements NodeInterface, Cloneable { |
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42 |
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43 @CompilationFinal private Node parent; |
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44 @CompilationFinal private SourceSection sourceSection; |
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45 |
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46 /** |
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47 * Marks array fields that are children of this node. |
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48 */ |
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49 @Retention(RetentionPolicy.RUNTIME) |
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50 @Target({ElementType.FIELD}) |
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51 public @interface Children { |
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52 } |
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53 |
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54 /** |
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55 * Marks fields that represent child nodes of this node. |
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56 */ |
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57 @Retention(RetentionPolicy.RUNTIME) |
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58 @Target({ElementType.FIELD}) |
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59 public @interface Child { |
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60 } |
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61 |
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62 protected Node() { |
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63 this(null); |
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64 } |
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65 |
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66 protected Node(SourceSection sourceSection) { |
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67 CompilerAsserts.neverPartOfCompilation(); |
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68 this.sourceSection = sourceSection; |
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69 if (TruffleOptions.TraceASTJSON) { |
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70 JSONHelper.dumpNewNode(this); |
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71 } |
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72 } |
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73 |
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74 /** |
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75 * Assigns a link to a guest language source section to this node. |
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76 * |
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77 * @param section the object representing a section in guest language source code |
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78 */ |
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79 public final void assignSourceSection(SourceSection section) { |
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80 if (sourceSection != null) { |
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81 // Patch this test during the transition to constructor-based |
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82 // source attribution, which would otherwise trigger this |
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83 // exception. This method will eventually be deprecated. |
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84 if (getSourceSection() != section) { |
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85 throw new IllegalStateException("Source section is already assigned. Old: " + getSourceSection() + ", new: " + section); |
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86 } |
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87 } |
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88 this.sourceSection = section; |
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89 } |
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90 |
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91 /** |
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92 * Returns a rough estimate for the cost of this {@link Node}. This estimate can be used by |
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93 * runtime systems or guest languages to implement heuristics based on Truffle ASTs. This method |
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94 * is intended to be overridden by subclasses. The default implementation returns the value of |
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95 * {@link NodeInfo#cost()} of the {@link NodeInfo} annotation declared at the subclass. If no |
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96 * {@link NodeInfo} annotation is declared the method returns {@link NodeCost#MONOMORPHIC} as a |
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97 * default value. |
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98 */ |
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99 public NodeCost getCost() { |
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100 NodeInfo info = getClass().getAnnotation(NodeInfo.class); |
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101 if (info != null) { |
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102 return info.cost(); |
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103 } |
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104 return NodeCost.MONOMORPHIC; |
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105 } |
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106 |
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107 /** |
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108 * Clears any previously assigned guest language source code from this node. |
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109 */ |
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110 public final void clearSourceSection() { |
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111 this.sourceSection = null; |
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112 } |
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113 |
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114 /** |
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115 * Retrieves the guest language source code section that is currently assigned to this node. |
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116 * |
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117 * @return the assigned source code section |
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118 */ |
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119 public final SourceSection getSourceSection() { |
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120 return sourceSection; |
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121 } |
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122 |
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123 /** |
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124 * Retrieves the guest language source code section that is currently assigned to this node. |
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125 * |
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126 * @return the assigned source code section |
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127 */ |
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128 @ExplodeLoop |
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129 public final SourceSection getEncapsulatingSourceSection() { |
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130 Node current = this; |
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131 while (current != null) { |
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132 if (current.sourceSection != null) { |
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133 return current.sourceSection; |
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134 } |
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135 current = current.parent; |
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136 } |
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137 return null; |
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138 } |
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139 |
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140 /** |
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141 * Method that updates the link to the parent in the array of specified new child nodes to this |
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142 * node. |
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143 * |
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144 * @param newChildren the array of new children whose parent should be updated |
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145 * @return the array of new children |
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146 */ |
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147 protected final <T extends Node> T[] insert(final T[] newChildren) { |
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148 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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149 assert newChildren != null; |
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150 for (Node newChild : newChildren) { |
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151 adoptHelper(newChild); |
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152 } |
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153 return newChildren; |
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154 } |
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155 |
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156 /** |
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157 * Method that updates the link to the parent in the specified new child node to this node. |
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158 * |
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159 * @param newChild the new child whose parent should be updated |
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160 * @return the new child |
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161 */ |
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162 protected final <T extends Node> T insert(final T newChild) { |
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163 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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164 assert newChild != null; |
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165 adoptHelper(newChild); |
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166 return newChild; |
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167 } |
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168 |
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169 public final void adoptChildren() { |
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170 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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171 adoptHelper(); |
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172 } |
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173 |
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174 private void adoptHelper(final Node newChild) { |
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175 assert newChild != null; |
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176 if (newChild == this) { |
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177 throw new IllegalStateException("The parent of a node can never be the node itself."); |
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178 } |
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179 newChild.parent = this; |
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180 if (TruffleOptions.TraceASTJSON) { |
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181 JSONHelper.dumpNewChild(this, newChild); |
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182 } |
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183 newChild.adoptHelper(); |
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184 } |
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185 |
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186 private void adoptHelper() { |
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187 Iterable<Node> children = this.getChildren(); |
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188 for (Node child : children) { |
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189 if (child != null && child.getParent() != this) { |
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190 this.adoptHelper(child); |
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191 } |
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192 } |
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193 } |
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194 |
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195 private void adoptUnadoptedHelper(final Node newChild) { |
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196 assert newChild != null; |
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197 if (newChild == this) { |
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198 throw new IllegalStateException("The parent of a node can never be the node itself."); |
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199 } |
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200 newChild.parent = this; |
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201 newChild.adoptUnadoptedHelper(); |
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202 } |
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203 |
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204 private void adoptUnadoptedHelper() { |
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205 Iterable<Node> children = this.getChildren(); |
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206 for (Node child : children) { |
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207 if (child != null && child.getParent() == null) { |
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208 this.adoptUnadoptedHelper(child); |
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209 } |
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210 } |
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211 } |
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212 |
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213 /** |
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214 * Returns properties of this node interesting for debugging and can be overwritten by |
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215 * subclasses to add their own custom properties. |
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216 * |
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217 * @return the properties as a key/value hash map |
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218 */ |
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219 public Map<String, Object> getDebugProperties() { |
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220 Map<String, Object> properties = new HashMap<>(); |
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221 return properties; |
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222 } |
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223 |
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224 /** |
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225 * The current parent node of this node. |
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226 * |
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227 * @return the parent node |
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228 */ |
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229 public final Node getParent() { |
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230 return parent; |
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231 } |
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232 |
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233 /** |
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234 * Replaces this node with another node. If there is a source section (see |
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235 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node. |
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236 * |
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237 * @param newNode the new node that is the replacement |
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238 * @param reason a description of the reason for the replacement |
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239 * @return the new node |
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240 */ |
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241 public final <T extends Node> T replace(final T newNode, final CharSequence reason) { |
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242 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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243 atomic(new Runnable() { |
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244 public void run() { |
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245 replaceHelper(newNode, reason); |
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246 } |
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247 }); |
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248 return newNode; |
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249 } |
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250 |
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251 /** |
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252 * Replaces this node with another node. If there is a source section (see |
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253 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node. |
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254 * |
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255 * @param newNode the new node that is the replacement |
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256 * @return the new node |
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257 */ |
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258 public final <T extends Node> T replace(T newNode) { |
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259 return replace(newNode, ""); |
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260 } |
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261 |
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262 final void replaceHelper(Node newNode, CharSequence reason) { |
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263 CompilerAsserts.neverPartOfCompilation(); |
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264 assert inAtomicBlock(); |
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265 if (this.getParent() == null) { |
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266 throw new IllegalStateException("This node cannot be replaced, because it does not yet have a parent."); |
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267 } |
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268 if (sourceSection != null && newNode.getSourceSection() == null) { |
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269 // Pass on the source section to the new node. |
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270 newNode.assignSourceSection(sourceSection); |
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271 } |
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272 // (aw) need to set parent *before* replace, so that (unsynchronized) getRootNode() |
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273 // will always find the root node |
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274 newNode.parent = this.parent; |
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275 if (NodeUtil.replaceChild(this.parent, this, newNode)) { |
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276 this.parent.adoptHelper(newNode); |
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277 } else { |
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278 this.parent.adoptUnadoptedHelper(newNode); |
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279 } |
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280 reportReplace(this, newNode, reason); |
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281 onReplace(newNode, reason); |
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282 } |
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283 |
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284 /** |
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285 * Checks if this node can be replaced by another node: tree structure & type. |
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286 */ |
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287 public final boolean isSafelyReplaceableBy(Node newNode) { |
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288 return NodeUtil.isReplacementSafe(getParent(), this, newNode); |
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289 } |
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290 |
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291 private void reportReplace(Node oldNode, Node newNode, CharSequence reason) { |
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292 Node node = this; |
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293 while (node != null) { |
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294 if (node instanceof ReplaceObserver) { |
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295 ((ReplaceObserver) node).nodeReplaced(oldNode, newNode, reason); |
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296 } else if (node instanceof RootNode) { |
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297 CallTarget target = ((RootNode) node).getCallTarget(); |
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298 if (target instanceof ReplaceObserver) { |
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299 ((ReplaceObserver) target).nodeReplaced(oldNode, newNode, reason); |
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300 } |
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301 } |
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302 node = node.getParent(); |
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303 } |
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304 if (TruffleOptions.TraceRewrites) { |
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305 NodeUtil.traceRewrite(this, newNode, reason); |
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306 } |
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307 if (TruffleOptions.TraceASTJSON) { |
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308 JSONHelper.dumpReplaceChild(this, newNode, reason); |
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309 } |
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310 } |
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311 |
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312 /** |
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313 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the |
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314 * node is rewritten. This method is invoked before the actual replace has happened. |
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315 * |
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316 * @param newNode the replacement node |
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317 * @param reason the reason the replace supplied |
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318 */ |
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319 protected void onReplace(Node newNode, CharSequence reason) { |
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320 // empty default |
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321 } |
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322 |
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323 /** |
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324 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all |
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325 * child nodes. |
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326 * |
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327 * @param nodeVisitor the visitor |
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328 */ |
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329 public final void accept(NodeVisitor nodeVisitor) { |
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330 if (nodeVisitor.visit(this)) { |
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331 for (Node child : this.getChildren()) { |
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332 if (child != null) { |
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333 child.accept(nodeVisitor); |
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334 } |
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335 } |
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336 } |
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337 } |
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338 |
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339 /** |
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340 * Iterator over the children of this node. |
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341 * |
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342 * @return the iterator |
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343 */ |
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344 public final Iterable<Node> getChildren() { |
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345 return new Iterable<Node>() { |
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346 public Iterator<Node> iterator() { |
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347 return NodeUtil.makeIterator(Node.this); |
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348 } |
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349 }; |
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350 } |
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351 |
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352 /** |
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353 * Creates a shallow copy of this node. |
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354 * |
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355 * @return the new copy |
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356 */ |
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357 public Node copy() { |
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358 try { |
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359 return (Node) super.clone(); |
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360 } catch (CloneNotSupportedException e) { |
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361 throw new AssertionError(e); |
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362 } |
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363 } |
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364 |
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365 /** |
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366 * Creates a deep copy of this node. |
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367 * |
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368 * @return the new deep copy |
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369 */ |
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370 public Node deepCopy() { |
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371 return NodeUtil.deepCopyImpl(this); |
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372 } |
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373 |
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374 /** |
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375 * This method must never be called. It enforces that {@link Object#clone} is not directly |
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376 * called by subclasses. Use the {@link #copy()} method instead. |
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377 */ |
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378 @Override |
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379 @Deprecated |
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380 protected final Object clone() throws CloneNotSupportedException { |
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381 throw new IllegalStateException("This method should never be called, use the copy method instead!"); |
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382 } |
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383 |
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384 /** |
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385 * Get the root node of the tree a node belongs to. |
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386 * |
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387 * @return the {@link RootNode} or {@code null} if there is none. |
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388 */ |
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389 public final RootNode getRootNode() { |
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390 Node rootNode = this; |
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391 while (rootNode.getParent() != null) { |
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392 assert !(rootNode instanceof RootNode) : "root node must not have a parent"; |
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393 rootNode = rootNode.getParent(); |
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394 } |
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395 if (rootNode instanceof RootNode) { |
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396 return (RootNode) rootNode; |
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397 } |
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398 return null; |
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399 } |
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400 |
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401 /** |
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402 * Any node for which this is {@code true} can be "instrumented" by installing a {@link Probe} |
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403 * that intercepts execution events at the node and routes them to any {@link Instrument}s that |
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404 * have been attached to the {@link Probe}. Only one {@link Probe} may be installed at each |
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405 * node; subsequent calls return the one already installed. |
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406 * <p> |
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407 * <b>Note:</b> instrumentation requires a appropriate {@link WrapperNode}, which must be |
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408 * provided by {@link #createWrapperNode()}. |
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409 * |
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410 * @see Instrument |
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411 */ |
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412 public boolean isInstrumentable() { |
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413 return false; |
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414 } |
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415 |
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416 /** |
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417 * For any node that {@link #isInstrumentable()}, this method must return a {@link Node} that: |
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418 * <ol> |
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419 * <li>implements {@link WrapperNode}</li> |
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420 * <li>has {@code this} as it's child, and</li> |
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421 * <li>whose type is safe for replacement of {@code this} in the parent.</li> |
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422 * </ol> |
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423 * |
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424 * @return an appropriately typed {@link WrapperNode} if {@link #isInstrumentable()}. |
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425 */ |
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426 public WrapperNode createWrapperNode() { |
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427 return null; |
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428 } |
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429 |
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430 /** |
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431 * Enables {@linkplain Instrument instrumentation} of a node, where the node is presumed to be |
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432 * part of a well-formed Truffle AST that is not being executed. If this node has not already |
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433 * been probed, modifies the AST by inserting a {@linkplain WrapperNode wrapper node} between |
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434 * the node and its parent; the wrapper node must be provided by implementations of |
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435 * {@link #createWrapperNode()}. No more than one {@link Probe} may be associated with a node, |
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436 * so a {@linkplain WrapperNode wrapper} may not wrap another {@linkplain WrapperNode wrapper}. |
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437 * |
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438 * @return a (possibly newly created) {@link Probe} associated with this node. |
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439 * @throws ProbeException (unchecked) when a probe cannot be created, leaving the AST unchanged |
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440 */ |
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441 public final Probe probe() { |
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442 |
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443 if (this instanceof WrapperNode) { |
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444 throw new ProbeException(ProbeFailure.Reason.WRAPPER_NODE, null, this, null); |
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445 } |
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446 |
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447 if (parent == null) { |
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448 throw new ProbeException(ProbeFailure.Reason.NO_PARENT, null, this, null); |
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449 } |
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450 |
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451 if (parent instanceof WrapperNode) { |
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452 return ((WrapperNode) parent).getProbe(); |
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453 } |
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454 |
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455 if (!isInstrumentable()) { |
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456 throw new ProbeException(ProbeFailure.Reason.NOT_INSTRUMENTABLE, parent, this, null); |
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457 } |
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458 |
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459 // Create a new wrapper/probe with this node as its child. |
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460 final WrapperNode wrapper = createWrapperNode(); |
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461 |
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462 if (wrapper == null || !(wrapper instanceof Node)) { |
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463 throw new ProbeException(ProbeFailure.Reason.NO_WRAPPER, parent, this, wrapper); |
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464 } |
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465 |
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466 final Node wrapperNode = (Node) wrapper; |
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467 |
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468 if (!this.isSafelyReplaceableBy(wrapperNode)) { |
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469 throw new ProbeException(ProbeFailure.Reason.WRAPPER_TYPE, parent, this, wrapper); |
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470 } |
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471 |
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472 // Connect it to a Probe |
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473 final Probe probe = ProbeNode.insertProbe(wrapper); |
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474 |
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475 // Replace this node in the AST with the wrapper |
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476 this.replace(wrapperNode); |
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477 |
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478 return probe; |
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479 } |
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480 |
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481 /** |
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482 * Converts this node to a textual representation useful for debugging. |
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483 */ |
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484 @Override |
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485 public String toString() { |
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486 StringBuilder sb = new StringBuilder(getClass().getSimpleName()); |
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487 Map<String, Object> properties = getDebugProperties(); |
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488 boolean hasProperties = false; |
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489 for (Map.Entry<String, Object> entry : properties.entrySet()) { |
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490 sb.append(hasProperties ? "," : "<"); |
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491 hasProperties = true; |
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492 sb.append(entry.getKey()).append("=").append(entry.getValue()); |
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493 } |
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494 if (hasProperties) { |
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495 sb.append(">"); |
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496 } |
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497 sb.append("@").append(Integer.toHexString(hashCode())); |
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498 return sb.toString(); |
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499 } |
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500 |
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501 public final void atomic(Runnable closure) { |
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502 RootNode rootNode = getRootNode(); |
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503 synchronized (rootNode != null ? rootNode : GIL) { |
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504 assert enterAtomic(); |
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505 try { |
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506 closure.run(); |
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507 } finally { |
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508 assert exitAtomic(); |
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509 } |
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510 } |
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511 } |
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512 |
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513 public final <T> T atomic(Callable<T> closure) { |
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514 try { |
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515 RootNode rootNode = getRootNode(); |
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516 synchronized (rootNode != null ? rootNode : GIL) { |
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517 assert enterAtomic(); |
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518 try { |
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519 return closure.call(); |
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520 } finally { |
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521 assert exitAtomic(); |
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522 } |
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523 } |
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524 } catch (RuntimeException | Error e) { |
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525 throw e; |
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526 } catch (Exception e) { |
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527 throw new RuntimeException(e); |
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528 } |
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529 } |
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530 |
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531 /** |
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532 * Returns a user-readable description of the purpose of the Node, or "" if no description is |
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533 * available. |
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534 */ |
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535 public String getDescription() { |
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536 NodeInfo info = getClass().getAnnotation(NodeInfo.class); |
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537 if (info != null) { |
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538 return info.description(); |
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539 } |
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540 return ""; |
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541 } |
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542 |
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543 /** |
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544 * Returns a string representing the language this node has been implemented for. If the |
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545 * language is unknown, returns "". |
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546 */ |
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547 public String getLanguage() { |
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548 NodeInfo info = getClass().getAnnotation(NodeInfo.class); |
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549 if (info != null && info.language() != null && info.language().length() > 0) { |
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550 return info.language(); |
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551 } |
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552 if (parent != null) { |
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553 return parent.getLanguage(); |
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554 } |
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555 return ""; |
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556 } |
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557 |
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558 private static final Object GIL = new Object(); |
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559 |
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560 private static final ThreadLocal<Integer> IN_ATOMIC_BLOCK = new ThreadLocal<Integer>() { |
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561 @Override |
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562 protected Integer initialValue() { |
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563 return 0; |
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564 } |
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565 }; |
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566 |
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567 private static boolean inAtomicBlock() { |
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568 return IN_ATOMIC_BLOCK.get() > 0; |
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569 } |
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570 |
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571 private static boolean enterAtomic() { |
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572 IN_ATOMIC_BLOCK.set(IN_ATOMIC_BLOCK.get() + 1); |
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573 return true; |
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574 } |
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575 |
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576 private static boolean exitAtomic() { |
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577 IN_ATOMIC_BLOCK.set(IN_ATOMIC_BLOCK.get() - 1); |
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578 return true; |
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Truffle: add assertion to always be in atomic blocks for replaces as it now may be violated by NodeUtil#nonAtomicReplace.
Christian Humer <christian.humer@gmail.com>
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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>
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580 } |