Mercurial > hg > truffle
annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 22325:414e82b9fc35
Release 0.9 is out, let's remove deprecated elements from the API
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Fri, 23 Oct 2015 20:23:00 +0200 |
parents | 0d36601f233e |
children | 0d4b0e4263ee |
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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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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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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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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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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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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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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14 * version 2 for more details (a copy is included in the LICENSE file that |
a4b84ba6dc2e
Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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 |
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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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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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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20 * |
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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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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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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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22 * or visit www.oracle.com if you need additional information or have any |
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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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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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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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26 |
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27 import java.lang.annotation.ElementType; |
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28 import java.lang.annotation.Retention; |
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29 import java.lang.annotation.RetentionPolicy; |
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30 import java.lang.annotation.Target; |
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31 import java.util.HashMap; |
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32 import java.util.Iterator; |
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33 import java.util.Map; |
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34 import java.util.concurrent.Callable; |
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35 |
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36 import com.oracle.truffle.api.CallTarget; |
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37 import com.oracle.truffle.api.CompilerAsserts; |
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38 import com.oracle.truffle.api.CompilerDirectives; |
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39 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal; |
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40 import com.oracle.truffle.api.ReplaceObserver; |
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41 import com.oracle.truffle.api.TruffleLanguage; |
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42 import com.oracle.truffle.api.TruffleOptions; |
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43 import com.oracle.truffle.api.impl.Accessor; |
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44 import com.oracle.truffle.api.source.SourceSection; |
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45 import com.oracle.truffle.api.utilities.JSONHelper; |
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46 |
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47 /** |
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48 * Abstract base class for all Truffle nodes. |
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49 */ |
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50 public abstract class Node implements NodeInterface, Cloneable { |
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51 private final NodeClass nodeClass; |
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52 @CompilationFinal private Node parent; |
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53 @CompilationFinal private SourceSection sourceSection; |
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54 |
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55 /** |
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56 * Marks array fields that are children of this node. |
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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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57 */ |
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58 @Retention(RetentionPolicy.RUNTIME) |
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59 @Target({ElementType.FIELD}) |
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60 public @interface Children { |
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61 } |
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62 |
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63 /** |
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64 * Marks fields that represent child nodes of this node. |
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65 */ |
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66 @Retention(RetentionPolicy.RUNTIME) |
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67 @Target({ElementType.FIELD}) |
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68 public @interface Child { |
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69 } |
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70 |
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71 protected Node() { |
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72 this(null); |
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73 } |
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74 |
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75 protected Node(SourceSection sourceSection) { |
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76 CompilerAsserts.neverPartOfCompilation(); |
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77 this.sourceSection = sourceSection; |
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78 this.nodeClass = NodeClass.get(getClass()); |
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79 if (TruffleOptions.TraceASTJSON) { |
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80 JSONHelper.dumpNewNode(this); |
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81 } |
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82 } |
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83 |
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84 /** |
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85 * Assigns a link to a guest language source section to this node. |
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86 * |
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87 * @param section the object representing a section in guest language source code |
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88 */ |
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89 public void assignSourceSection(SourceSection section) { |
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90 if (sourceSection != null) { |
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91 // Patch this test during the transition to constructor-based |
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92 // source attribution, which would otherwise trigger this |
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93 // exception. This method will eventually be deprecated. |
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94 if (getSourceSection() != section) { |
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95 throw new IllegalStateException("Source section is already assigned. Old: " + getSourceSection() + ", new: " + section); |
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96 } |
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97 } |
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98 this.sourceSection = section; |
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99 } |
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100 |
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101 NodeClass getNodeClass() { |
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102 return nodeClass; |
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103 } |
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104 |
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105 /** |
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106 * Returns a rough estimate for the cost of this {@link Node}. This estimate can be used by |
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107 * runtime systems or guest languages to implement heuristics based on Truffle ASTs. This method |
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108 * is intended to be overridden by subclasses. The default implementation returns the value of |
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109 * {@link NodeInfo#cost()} of the {@link NodeInfo} annotation declared at the subclass. If no |
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110 * {@link NodeInfo} annotation is declared the method returns {@link NodeCost#MONOMORPHIC} as a |
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111 * default value. |
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112 */ |
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113 public NodeCost getCost() { |
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114 NodeInfo info = getClass().getAnnotation(NodeInfo.class); |
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115 if (info != null) { |
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116 return info.cost(); |
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117 } |
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118 return NodeCost.MONOMORPHIC; |
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119 } |
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120 |
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121 /** |
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122 * Clears any previously assigned guest language source code from this node. |
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123 */ |
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124 public void clearSourceSection() { |
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125 this.sourceSection = null; |
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126 } |
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127 |
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128 /** |
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129 * Retrieves the segment of guest language source code that is represented by this Node. |
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130 * |
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131 * @return the source code represented by this Node |
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132 */ |
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133 public SourceSection getSourceSection() { |
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134 return sourceSection; |
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135 } |
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136 |
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137 /** |
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138 * Retrieves the segment of guest language source code that is represented by this Node, if |
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139 * present; otherwise retrieves the segment represented by the nearest AST ancestor that has |
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140 * this information. |
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141 * |
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142 * @return an approximation of the source code represented by this Node |
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143 */ |
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144 @ExplodeLoop |
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145 public SourceSection getEncapsulatingSourceSection() { |
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146 Node current = this; |
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147 while (current != null) { |
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148 if (current.sourceSection != null) { |
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149 return current.sourceSection; |
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150 } |
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151 current = current.parent; |
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152 } |
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153 return null; |
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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 array of specified new child nodes to this |
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158 * node. |
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159 * |
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160 * @param newChildren the array of new children whose parent should be updated |
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161 * @return the array of new children |
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162 */ |
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163 protected final <T extends Node> T[] insert(final T[] newChildren) { |
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164 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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165 assert newChildren != null; |
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166 for (Node newChild : newChildren) { |
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167 adoptHelper(newChild); |
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168 } |
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169 return newChildren; |
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170 } |
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171 |
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172 /** |
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173 * Method that updates the link to the parent in the specified new child node to this node. |
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174 * |
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175 * @param newChild the new child whose parent should be updated |
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176 * @return the new child |
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177 */ |
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178 protected final <T extends Node> T insert(final T newChild) { |
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179 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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180 assert newChild != null; |
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181 adoptHelper(newChild); |
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182 return newChild; |
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183 } |
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184 |
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185 public final void adoptChildren() { |
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186 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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187 adoptHelper(); |
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188 } |
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189 |
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190 void adoptHelper(final Node newChild) { |
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191 assert newChild != null; |
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192 if (newChild == this) { |
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193 throw new IllegalStateException("The parent of a node can never be the node itself."); |
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194 } |
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195 newChild.parent = this; |
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196 if (TruffleOptions.TraceASTJSON) { |
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197 JSONHelper.dumpNewChild(this, newChild); |
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198 } |
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199 newChild.adoptHelper(); |
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200 } |
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201 |
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202 private void adoptHelper() { |
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203 NodeUtil.forEachChild(this, new NodeVisitor() { |
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204 public boolean visit(Node child) { |
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205 if (child != null && child.getParent() != Node.this) { |
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206 Node.this.adoptHelper(child); |
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207 } |
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208 return true; |
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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 private void adoptUnadoptedHelper(final Node newChild) { |
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214 assert newChild != null; |
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215 if (newChild == this) { |
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216 throw new IllegalStateException("The parent of a node can never be the node itself."); |
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217 } |
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218 newChild.parent = this; |
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219 newChild.adoptUnadoptedHelper(); |
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220 } |
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221 |
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222 private void adoptUnadoptedHelper() { |
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223 NodeUtil.forEachChild(this, new NodeVisitor() { |
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224 public boolean visit(Node child) { |
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225 if (child != null && child.getParent() == null) { |
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226 Node.this.adoptUnadoptedHelper(child); |
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227 } |
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228 return true; |
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229 } |
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230 }); |
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231 } |
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232 |
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233 /** |
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234 * Returns properties of this node interesting for debugging and can be overwritten by |
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235 * subclasses to add their own custom properties. |
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236 * |
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237 * @return the properties as a key/value hash map |
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238 */ |
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239 public Map<String, Object> getDebugProperties() { |
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240 Map<String, Object> properties = new HashMap<>(); |
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241 return properties; |
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242 } |
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243 |
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244 /** |
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245 * The current parent node of this node. |
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246 * |
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247 * @return the parent node |
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248 */ |
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249 public final Node getParent() { |
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250 return parent; |
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251 } |
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252 |
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253 /** |
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254 * Replaces this node with another node. If there is a source section (see |
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255 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node. |
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256 * |
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257 * @param newNode the new node that is the replacement |
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258 * @param reason a description of the reason for the replacement |
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259 * @return the new node |
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260 */ |
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261 public final <T extends Node> T replace(final T newNode, final CharSequence reason) { |
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262 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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263 atomic(new Runnable() { |
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264 public void run() { |
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265 replaceHelper(newNode, reason); |
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266 } |
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267 }); |
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268 return newNode; |
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269 } |
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270 |
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271 /** |
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272 * Replaces this node with another node. If there is a source section (see |
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273 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node. |
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274 * |
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275 * @param newNode the new node that is the replacement |
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276 * @return the new node |
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277 */ |
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278 public final <T extends Node> T replace(T newNode) { |
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279 return replace(newNode, ""); |
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280 } |
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281 |
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282 final void replaceHelper(Node newNode, CharSequence reason) { |
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283 CompilerAsserts.neverPartOfCompilation(); |
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284 assert inAtomicBlock(); |
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285 if (this.getParent() == null) { |
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286 throw new IllegalStateException("This node cannot be replaced, because it does not yet have a parent."); |
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287 } |
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288 if (sourceSection != null && newNode.getSourceSection() == null) { |
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289 // Pass on the source section to the new node. |
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290 newNode.assignSourceSection(sourceSection); |
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291 } |
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292 // (aw) need to set parent *before* replace, so that (unsynchronized) getRootNode() |
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293 // will always find the root node |
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294 newNode.parent = this.parent; |
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295 if (!NodeUtil.replaceChild(this.parent, this, newNode, true)) { |
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296 this.parent.adoptUnadoptedHelper(newNode); |
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297 } |
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298 reportReplace(this, newNode, reason); |
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299 onReplace(newNode, reason); |
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300 } |
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301 |
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302 /** |
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303 * Checks if this node can be replaced by another node: tree structure & type. |
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304 */ |
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305 public final boolean isSafelyReplaceableBy(Node newNode) { |
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306 return NodeUtil.isReplacementSafe(getParent(), this, newNode); |
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307 } |
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308 |
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309 private void reportReplace(Node oldNode, Node newNode, CharSequence reason) { |
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310 Node node = this; |
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311 while (node != null) { |
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312 boolean consumed = false; |
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313 if (node instanceof ReplaceObserver) { |
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314 consumed = ((ReplaceObserver) node).nodeReplaced(oldNode, newNode, reason); |
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315 } else if (node instanceof RootNode) { |
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316 CallTarget target = ((RootNode) node).getCallTarget(); |
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317 if (target instanceof ReplaceObserver) { |
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318 consumed = ((ReplaceObserver) target).nodeReplaced(oldNode, newNode, reason); |
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319 } |
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320 } |
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321 if (consumed) { |
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322 break; |
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323 } |
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324 node = node.getParent(); |
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325 } |
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326 if (TruffleOptions.TraceRewrites) { |
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327 NodeUtil.traceRewrite(this, newNode, reason); |
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328 } |
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329 if (TruffleOptions.TraceASTJSON) { |
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330 JSONHelper.dumpReplaceChild(this, newNode, reason); |
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331 } |
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332 } |
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333 |
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334 /** |
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335 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the |
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336 * node is rewritten. This method is invoked before the actual replace has happened. |
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337 * |
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338 * @param newNode the replacement node |
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339 * @param reason the reason the replace supplied |
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340 */ |
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341 protected void onReplace(Node newNode, CharSequence reason) { |
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342 // empty default |
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343 } |
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344 |
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345 /** |
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346 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all |
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347 * child nodes. |
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348 * |
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349 * @param nodeVisitor the visitor |
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350 */ |
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351 public final void accept(NodeVisitor nodeVisitor) { |
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352 if (nodeVisitor.visit(this)) { |
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353 NodeUtil.forEachChildRecursive(this, nodeVisitor); |
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354 } |
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355 } |
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356 |
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357 /** |
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358 * Iterator over the children of this node. |
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359 * |
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360 * @return the iterator |
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361 */ |
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362 public final Iterable<Node> getChildren() { |
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363 return new Iterable<Node>() { |
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364 public Iterator<Node> iterator() { |
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365 return getNodeClass().makeIterator(Node.this); |
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366 } |
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367 }; |
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368 } |
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369 |
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370 /** |
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371 * Creates a shallow copy of this node. |
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372 * |
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373 * @return the new copy |
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374 */ |
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375 public Node copy() { |
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376 CompilerAsserts.neverPartOfCompilation(); |
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377 |
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378 try { |
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379 return (Node) super.clone(); |
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380 } catch (CloneNotSupportedException e) { |
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381 throw new AssertionError(e); |
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382 } |
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383 } |
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384 |
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385 /** |
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386 * Creates a deep copy of this node. |
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387 * |
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388 * @return the new deep copy |
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389 */ |
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390 public Node deepCopy() { |
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391 return NodeUtil.deepCopyImpl(this); |
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392 } |
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393 |
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394 /** |
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395 * Get the root node of the tree a node belongs to. |
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396 * |
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397 * @return the {@link RootNode} or {@code null} if there is none. |
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398 */ |
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399 public final RootNode getRootNode() { |
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400 Node rootNode = this; |
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401 while (rootNode.getParent() != null) { |
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402 assert !(rootNode instanceof RootNode) : "root node must not have a parent"; |
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403 rootNode = rootNode.getParent(); |
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404 } |
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405 if (rootNode instanceof RootNode) { |
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406 return (RootNode) rootNode; |
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407 } |
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408 return null; |
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409 } |
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410 |
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411 /** |
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412 * Converts this node to a textual representation useful for debugging. |
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413 */ |
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414 @Override |
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415 public String toString() { |
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416 StringBuilder sb = new StringBuilder(getClass().getSimpleName()); |
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417 Map<String, Object> properties = getDebugProperties(); |
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418 boolean hasProperties = false; |
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419 for (Map.Entry<String, Object> entry : properties.entrySet()) { |
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420 sb.append(hasProperties ? "," : "<"); |
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421 hasProperties = true; |
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422 sb.append(entry.getKey()).append("=").append(entry.getValue()); |
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423 } |
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424 if (hasProperties) { |
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425 sb.append(">"); |
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426 } |
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427 sb.append("@").append(Integer.toHexString(hashCode())); |
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428 return sb.toString(); |
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429 } |
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430 |
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431 public final void atomic(Runnable closure) { |
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432 RootNode rootNode = getRootNode(); |
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433 synchronized (rootNode != null ? rootNode : GIL) { |
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434 assert enterAtomic(); |
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435 try { |
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436 closure.run(); |
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437 } finally { |
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438 assert exitAtomic(); |
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439 } |
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440 } |
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441 } |
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442 |
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443 public final <T> T atomic(Callable<T> closure) { |
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444 try { |
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445 RootNode rootNode = getRootNode(); |
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446 synchronized (rootNode != null ? rootNode : GIL) { |
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447 assert enterAtomic(); |
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448 try { |
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449 return closure.call(); |
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450 } finally { |
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451 assert exitAtomic(); |
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452 } |
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453 } |
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454 } catch (RuntimeException | Error e) { |
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455 throw e; |
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456 } catch (Exception e) { |
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457 throw new RuntimeException(e); |
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458 } |
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459 } |
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460 |
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461 /** |
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462 * Returns a user-readable description of the purpose of the Node, or "" if no description is |
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463 * available. |
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464 */ |
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465 public String getDescription() { |
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466 NodeInfo info = getClass().getAnnotation(NodeInfo.class); |
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467 if (info != null) { |
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468 return info.description(); |
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469 } |
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470 return ""; |
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471 } |
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472 |
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473 /** |
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474 * Returns a string representing the language this node has been implemented for. If the |
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475 * language is unknown, returns "". |
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476 */ |
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477 public String getLanguage() { |
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478 NodeInfo info = getClass().getAnnotation(NodeInfo.class); |
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479 if (info != null && info.language() != null && info.language().length() > 0) { |
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480 return info.language(); |
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481 } |
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482 if (parent != null) { |
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483 return parent.getLanguage(); |
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484 } |
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485 return ""; |
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486 } |
19606
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Truffle: Node cleanup
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487 |
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488 private static final Object GIL = new Object(); |
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489 |
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490 private static final ThreadLocal<Integer> IN_ATOMIC_BLOCK = new ThreadLocal<Integer>() { |
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491 @Override |
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492 protected Integer initialValue() { |
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493 return 0; |
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494 } |
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495 }; |
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496 |
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497 private static boolean inAtomicBlock() { |
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498 return IN_ATOMIC_BLOCK.get() > 0; |
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499 } |
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500 |
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501 private static boolean enterAtomic() { |
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502 IN_ATOMIC_BLOCK.set(IN_ATOMIC_BLOCK.get() + 1); |
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503 return true; |
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504 } |
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505 |
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506 private static boolean exitAtomic() { |
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507 IN_ATOMIC_BLOCK.set(IN_ATOMIC_BLOCK.get() - 1); |
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508 return true; |
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509 } |
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Making debugger always on for each TruffleVM execution. Introducing EventConsumer to process such debugger events. Requesting each RootNode to be associated with a TruffleLanguage, so debugger can find out proper context for each Node where executions gets suspended.
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510 |
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511 static final class AccessorNodes extends Accessor { |
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Clearly separating the TruffleLanguage definition from context used during its execution. TruffleLanguage now has to have public static field INSTANCE and override createContext method.
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512 @SuppressWarnings("rawtypes") |
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513 @Override |
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514 protected Class<? extends TruffleLanguage> findLanguage(RootNode n) { |
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515 return n.language; |
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516 } |
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517 |
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518 @Override |
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519 protected void probeAST(RootNode rootNode) { |
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520 super.probeAST(rootNode); |
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521 } |
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522 } |
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523 |
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524 // registers into Accessor.NODES |
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525 static final AccessorNodes ACCESSOR = new AccessorNodes(); |
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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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526 } |