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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 20131:4b12d5355811

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Truffle: do not use iterators for visitors.
author Christian Humer <christian.humer@gmail.com>
date Thu, 02 Apr 2015 01:27:27 +0200
parents 8dc73c226c63
children f6f3f44a1830
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.nodes;
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26
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27 import java.lang.annotation.*;
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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 private final NodeClass nodeClass;
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44 @CompilationFinal private Node parent;
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45 @CompilationFinal private SourceSection sourceSection;
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46
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47 /**
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48 * Marks array fields that are children of this node.
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49 */
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50 @Retention(RetentionPolicy.RUNTIME)
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51 @Target({ElementType.FIELD})
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52 public @interface Children {
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53 }
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54
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55 /**
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56 * Marks fields that represent child nodes of this node.
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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 Child {
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61 }
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62
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63 protected Node() {
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64 this(null);
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65 }
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66
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67 protected Node(SourceSection sourceSection) {
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68 CompilerAsserts.neverPartOfCompilation();
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69 this.sourceSection = sourceSection;
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70 this.nodeClass = NodeClass.get(getClass());
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71 if (TruffleOptions.TraceASTJSON) {
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72 JSONHelper.dumpNewNode(this);
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73 }
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74 }
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75
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76 /**
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77 * Assigns a link to a guest language source section to this node.
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78 *
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79 * @param section the object representing a section in guest language source code
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80 */
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81 public final void assignSourceSection(SourceSection section) {
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82 if (sourceSection != null) {
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83 // Patch this test during the transition to constructor-based
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84 // source attribution, which would otherwise trigger this
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85 // exception. This method will eventually be deprecated.
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86 if (getSourceSection() != section) {
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87 throw new IllegalStateException("Source section is already assigned. Old: " + getSourceSection() + ", new: " + section);
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88 }
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89 }
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90 this.sourceSection = section;
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91 }
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92
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93 NodeClass getNodeClass() {
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94 return nodeClass;
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95 }
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96
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97 /**
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98 * Returns a rough estimate for the cost of this {@link Node}. This estimate can be used by
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99 * runtime systems or guest languages to implement heuristics based on Truffle ASTs. This method
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100 * is intended to be overridden by subclasses. The default implementation returns the value of
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101 * {@link NodeInfo#cost()} of the {@link NodeInfo} annotation declared at the subclass. If no
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102 * {@link NodeInfo} annotation is declared the method returns {@link NodeCost#MONOMORPHIC} as a
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103 * default value.
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104 */
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105 public NodeCost getCost() {
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106 NodeInfo info = getClass().getAnnotation(NodeInfo.class);
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107 if (info != null) {
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108 return info.cost();
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109 }
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110 return NodeCost.MONOMORPHIC;
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111 }
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112
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113 /**
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114 * Clears any previously assigned guest language source code from this node.
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115 */
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116 public final void clearSourceSection() {
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117 this.sourceSection = null;
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118 }
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119
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120 /**
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121 * Retrieves the guest language source code section that is currently assigned to this node.
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122 *
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123 * @return the assigned source code section
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124 */
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125 public final SourceSection getSourceSection() {
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126 return sourceSection;
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127 }
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128
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129 /**
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130 * Retrieves the guest language source code section that is currently assigned to this node.
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131 *
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132 * @return the assigned source code section
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133 */
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134 @ExplodeLoop
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135 public final SourceSection getEncapsulatingSourceSection() {
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136 Node current = this;
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137 while (current != null) {
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138 if (current.sourceSection != null) {
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139 return current.sourceSection;
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140 }
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141 current = current.parent;
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142 }
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143 return null;
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144 }
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145
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146 /**
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147 * Method that updates the link to the parent in the array of specified new child nodes to this
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148 * node.
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149 *
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150 * @param newChildren the array of new children whose parent should be updated
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151 * @return the array of new children
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152 */
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153 protected final <T extends Node> T[] insert(final T[] newChildren) {
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154 CompilerDirectives.transferToInterpreterAndInvalidate();
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155 assert newChildren != null;
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156 for (Node newChild : newChildren) {
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157 adoptHelper(newChild);
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158 }
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159 return newChildren;
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160 }
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161
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162 /**
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163 * Method that updates the link to the parent in the specified new child node to this node.
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164 *
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165 * @param newChild the new child whose parent should be updated
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166 * @return the new child
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167 */
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168 protected final <T extends Node> T insert(final T newChild) {
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169 CompilerDirectives.transferToInterpreterAndInvalidate();
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170 assert newChild != null;
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171 adoptHelper(newChild);
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172 return newChild;
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173 }
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174
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175 public final void adoptChildren() {
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176 CompilerDirectives.transferToInterpreterAndInvalidate();
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177 adoptHelper();
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178 }
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179
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180 private void adoptHelper(final Node newChild) {
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181 assert newChild != null;
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182 if (newChild == this) {
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183 throw new IllegalStateException("The parent of a node can never be the node itself.");
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184 }
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185 newChild.parent = this;
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186 if (TruffleOptions.TraceASTJSON) {
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187 JSONHelper.dumpNewChild(this, newChild);
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188 }
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189 newChild.adoptHelper();
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190 }
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191
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192 private void adoptHelper() {
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193 Iterable<Node> children = this.getChildren();
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194 for (Node child : children) {
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195 if (child != null && child.getParent() != this) {
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196 this.adoptHelper(child);
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197 }
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198 }
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199 }
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200
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201 private void adoptUnadoptedHelper(final Node newChild) {
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202 assert newChild != null;
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203 if (newChild == this) {
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204 throw new IllegalStateException("The parent of a node can never be the node itself.");
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205 }
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206 newChild.parent = this;
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207 newChild.adoptUnadoptedHelper();
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208 }
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209
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210 private void adoptUnadoptedHelper() {
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211 Iterable<Node> children = this.getChildren();
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212 for (Node child : children) {
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213 if (child != null && child.getParent() == null) {
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214 this.adoptUnadoptedHelper(child);
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215 }
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216 }
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217 }
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218
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219 /**
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220 * Returns properties of this node interesting for debugging and can be overwritten by
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221 * subclasses to add their own custom properties.
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222 *
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223 * @return the properties as a key/value hash map
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224 */
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225 public Map<String, Object> getDebugProperties() {
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226 Map<String, Object> properties = new HashMap<>();
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227 return properties;
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228 }
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229
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230 /**
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231 * The current parent node of this node.
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232 *
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233 * @return the parent node
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234 */
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235 public final Node getParent() {
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236 return parent;
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237 }
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238
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239 /**
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240 * Replaces this node with another node. If there is a source section (see
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241 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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242 *
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243 * @param newNode the new node that is the replacement
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244 * @param reason a description of the reason for the replacement
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245 * @return the new node
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246 */
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247 public final <T extends Node> T replace(final T newNode, final CharSequence reason) {
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248 CompilerDirectives.transferToInterpreterAndInvalidate();
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249 atomic(new Runnable() {
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250 public void run() {
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251 replaceHelper(newNode, reason);
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252 }
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253 });
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254 return newNode;
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255 }
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256
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257 /**
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258 * Replaces this node with another node. If there is a source section (see
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259 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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260 *
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261 * @param newNode the new node that is the replacement
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262 * @return the new node
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263 */
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264 public final <T extends Node> T replace(T newNode) {
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265 return replace(newNode, "");
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266 }
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267
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268 final void replaceHelper(Node newNode, CharSequence reason) {
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269 CompilerAsserts.neverPartOfCompilation();
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270 assert inAtomicBlock();
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271 if (this.getParent() == null) {
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272 throw new IllegalStateException("This node cannot be replaced, because it does not yet have a parent.");
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273 }
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274 if (sourceSection != null && newNode.getSourceSection() == null) {
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275 // Pass on the source section to the new node.
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276 newNode.assignSourceSection(sourceSection);
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277 }
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278 // (aw) need to set parent *before* replace, so that (unsynchronized) getRootNode()
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279 // will always find the root node
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280 newNode.parent = this.parent;
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281 if (NodeUtil.replaceChild(this.parent, this, newNode)) {
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282 this.parent.adoptHelper(newNode);
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283 } else {
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284 this.parent.adoptUnadoptedHelper(newNode);
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285 }
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286 reportReplace(this, newNode, reason);
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287 onReplace(newNode, reason);
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288 }
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289
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290 /**
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291 * Checks if this node can be replaced by another node: tree structure & type.
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292 */
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293 public final boolean isSafelyReplaceableBy(Node newNode) {
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294 return NodeUtil.isReplacementSafe(getParent(), this, newNode);
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295 }
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296
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297 private void reportReplace(Node oldNode, Node newNode, CharSequence reason) {
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298 Node node = this;
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299 while (node != null) {
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300 if (node instanceof ReplaceObserver) {
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301 ((ReplaceObserver) node).nodeReplaced(oldNode, newNode, reason);
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302 } else if (node instanceof RootNode) {
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303 CallTarget target = ((RootNode) node).getCallTarget();
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304 if (target instanceof ReplaceObserver) {
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305 ((ReplaceObserver) target).nodeReplaced(oldNode, newNode, reason);
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306 }
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307 }
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308 node = node.getParent();
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309 }
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310 if (TruffleOptions.TraceRewrites) {
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311 NodeUtil.traceRewrite(this, newNode, reason);
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312 }
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313 if (TruffleOptions.TraceASTJSON) {
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314 JSONHelper.dumpReplaceChild(this, newNode, reason);
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315 }
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316 }
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317
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318 /**
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319 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the
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320 * node is rewritten. This method is invoked before the actual replace has happened.
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321 *
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322 * @param newNode the replacement node
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323 * @param reason the reason the replace supplied
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324 */
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325 protected void onReplace(Node newNode, CharSequence reason) {
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326 // empty default
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327 }
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328
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329 /**
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330 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all
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331 * child nodes.
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332 *
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333 * @param nodeVisitor the visitor
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334 */
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335 public final void accept(NodeVisitor nodeVisitor) {
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336 if (nodeVisitor.visit(this)) {
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337 NodeUtil.forEachChildRecursive(this, nodeVisitor);
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338 }
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339 }
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340
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341 /**
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342 * Iterator over the children of this node.
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343 *
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344 * @return the iterator
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345 */
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346 public final Iterable<Node> getChildren() {
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347 return new Iterable<Node>() {
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348 public Iterator<Node> iterator() {
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349 return nodeClass.makeIterator(Node.this);
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350 }
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351 };
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352 }
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353
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354 /**
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355 * Creates a shallow copy of this node.
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356 *
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357 * @return the new copy
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358 */
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359 public Node copy() {
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360 try {
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361 return (Node) super.clone();
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362 } catch (CloneNotSupportedException e) {
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363 throw new AssertionError(e);
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364 }
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365 }
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366
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367 /**
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368 * Creates a deep copy of this node.
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369 *
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370 * @return the new deep copy
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371 */
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372 public Node deepCopy() {
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373 return NodeUtil.deepCopyImpl(this);
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374 }
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375
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376 /**
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377 * This method must never be called. It enforces that {@link Object#clone} is not directly
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378 * called by subclasses. Use the {@link #copy()} method instead.
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379 */
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380 @Override
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381 @Deprecated
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382 protected final Object clone() throws CloneNotSupportedException {
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383 throw new IllegalStateException("This method should never be called, use the copy method instead!");
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384 }
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385
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386 /**
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387 * Get the root node of the tree a node belongs to.
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388 *
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389 * @return the {@link RootNode} or {@code null} if there is none.
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390 */
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391 public final RootNode getRootNode() {
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392 Node rootNode = this;
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393 while (rootNode.getParent() != null) {
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394 assert !(rootNode instanceof RootNode) : "root node must not have a parent";
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395 rootNode = rootNode.getParent();
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396 }
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397 if (rootNode instanceof RootNode) {
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398 return (RootNode) rootNode;
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399 }
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400 return null;
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401 }
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402
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403 /**
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404 * Any node for which this is {@code true} can be "instrumented" by installing a {@link Probe}
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405 * that intercepts execution events at the node and routes them to any {@link Instrument}s that
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406 * have been attached to the {@link Probe}. Only one {@link Probe} may be installed at each
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407 * node; subsequent calls return the one already installed.
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408 * <p>
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409 * <b>Note:</b> instrumentation requires a appropriate {@link WrapperNode}, which must be
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410 * provided by {@link #createWrapperNode()}.
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411 *
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412 * @see Instrument
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413 */
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414 public boolean isInstrumentable() {
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415 return false;
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416 }
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417
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418 /**
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419 * For any node that {@link #isInstrumentable()}, this method must return a {@link Node} that:
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420 * <ol>
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421 * <li>implements {@link WrapperNode}</li>
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422 * <li>has {@code this} as it's child, and</li>
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423 * <li>whose type is safe for replacement of {@code this} in the parent.</li>
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424 * </ol>
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425 *
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426 * @return an appropriately typed {@link WrapperNode} if {@link #isInstrumentable()}.
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427 */
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428 public WrapperNode createWrapperNode() {
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429 return null;
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430 }
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431
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432 /**
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433 * Enables {@linkplain Instrument instrumentation} of a node, where the node is presumed to be
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diff changeset
434 * part of a well-formed Truffle AST that is not being executed. If this node has not already
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parents: 18750
diff changeset
435 * been probed, modifies the AST by inserting a {@linkplain WrapperNode wrapper node} between
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parents: 18750
diff changeset
436 * the node and its parent; the wrapper node must be provided by implementations of
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diff changeset
437 * {@link #createWrapperNode()}. No more than one {@link Probe} may be associated with a node,
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438 * so a {@linkplain WrapperNode wrapper} may not wrap another {@linkplain WrapperNode wrapper}.
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439 *
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440 * @return a (possibly newly created) {@link Probe} associated with this node.
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441 * @throws ProbeException (unchecked) when a probe cannot be created, leaving the AST unchanged
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442 */
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443 public final Probe probe() {
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444
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445 if (this instanceof WrapperNode) {
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446 throw new ProbeException(ProbeFailure.Reason.WRAPPER_NODE, null, this, null);
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447 }
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448
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449 if (parent == null) {
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450 throw new ProbeException(ProbeFailure.Reason.NO_PARENT, null, this, null);
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451 }
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452
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453 if (parent instanceof WrapperNode) {
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454 return ((WrapperNode) parent).getProbe();
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455 }
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456
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diff changeset
457 if (!isInstrumentable()) {
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458 throw new ProbeException(ProbeFailure.Reason.NOT_INSTRUMENTABLE, parent, this, null);
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459 }
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460
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461 // Create a new wrapper/probe with this node as its child.
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462 final WrapperNode wrapper = createWrapperNode();
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463
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diff changeset
464 if (wrapper == null || !(wrapper instanceof Node)) {
867058575979 Truffle: Improved support for "probing" AST nodes:
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465 throw new ProbeException(ProbeFailure.Reason.NO_WRAPPER, parent, this, wrapper);
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466 }
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467
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diff changeset
468 final Node wrapperNode = (Node) wrapper;
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469
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
470 if (!this.isSafelyReplaceableBy(wrapperNode)) {
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
471 throw new ProbeException(ProbeFailure.Reason.WRAPPER_TYPE, parent, this, wrapper);
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472 }
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473
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
474 // Connect it to a Probe
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
475 final Probe probe = ProbeNode.insertProbe(wrapper);
867058575979 Truffle: Improved support for "probing" AST nodes:
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476
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
477 // Replace this node in the AST with the wrapper
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diff changeset
478 this.replace(wrapperNode);
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479
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diff changeset
480 return probe;
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diff changeset
481 }
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482
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
483 /**
7267
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484 * Converts this node to a textual representation useful for debugging.
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485 */
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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486 @Override
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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diff changeset
487 public String toString() {
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diff changeset
488 StringBuilder sb = new StringBuilder(getClass().getSimpleName());
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489 Map<String, Object> properties = getDebugProperties();
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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490 boolean hasProperties = false;
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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diff changeset
491 for (Map.Entry<String, Object> entry : properties.entrySet()) {
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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492 sb.append(hasProperties ? "," : "<");
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493 hasProperties = true;
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diff changeset
494 sb.append(entry.getKey()).append("=").append(entry.getValue());
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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495 }
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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496 if (hasProperties) {
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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diff changeset
497 sb.append(">");
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diff changeset
498 }
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499 sb.append("@").append(Integer.toHexString(hashCode()));
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500 return sb.toString();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
501 }
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Andreas Woess <andreas.woess@jku.at>
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diff changeset
502
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503 public final void atomic(Runnable closure) {
ba52fbec5b6c Truffle: atomic node rewriting
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504 RootNode rootNode = getRootNode();
19606
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diff changeset
505 synchronized (rootNode != null ? rootNode : GIL) {
19767
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parents: 19758
diff changeset
506 assert enterAtomic();
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parents: 19758
diff changeset
507 try {
e6a4ba0980dd Truffle: add assertion to always be in atomic blocks for replaces as it now may be violated by NodeUtil#nonAtomicReplace.
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parents: 19758
diff changeset
508 closure.run();
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diff changeset
509 } finally {
e6a4ba0980dd Truffle: add assertion to always be in atomic blocks for replaces as it now may be violated by NodeUtil#nonAtomicReplace.
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parents: 19758
diff changeset
510 assert exitAtomic();
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parents: 19758
diff changeset
511 }
14629
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512 }
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
513 }
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
514
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
515 public final <T> T atomic(Callable<T> closure) {
ba52fbec5b6c Truffle: atomic node rewriting
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diff changeset
516 try {
ba52fbec5b6c Truffle: atomic node rewriting
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diff changeset
517 RootNode rootNode = getRootNode();
19606
d344d76b7b6d Truffle: Node cleanup
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diff changeset
518 synchronized (rootNode != null ? rootNode : GIL) {
19767
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parents: 19758
diff changeset
519 assert enterAtomic();
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diff changeset
520 try {
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parents: 19758
diff changeset
521 return closure.call();
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diff changeset
522 } finally {
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parents: 19758
diff changeset
523 assert exitAtomic();
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parents: 19758
diff changeset
524 }
14629
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525 }
19606
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Andreas Woess <andreas.woess@oracle.com>
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diff changeset
526 } catch (RuntimeException | Error e) {
14629
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diff changeset
527 throw e;
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diff changeset
528 } catch (Exception e) {
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diff changeset
529 throw new RuntimeException(e);
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Andreas Woess <andreas.woess@jku.at>
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530 }
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
531 }
15775
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diff changeset
532
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
533 /**
4293efaaab76 Add description and language to the NodeInfo annotation
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parents: 15474
diff changeset
534 * Returns a user-readable description of the purpose of the Node, or "" if no description is
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
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diff changeset
535 * available.
4293efaaab76 Add description and language to the NodeInfo annotation
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parents: 15474
diff changeset
536 */
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
537 public String getDescription() {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
538 NodeInfo info = getClass().getAnnotation(NodeInfo.class);
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
539 if (info != null) {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
540 return info.description();
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
541 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
542 return "";
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
543 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
544
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
545 /**
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
546 * Returns a string representing the language this node has been implemented for. If the
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
547 * language is unknown, returns "".
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
548 */
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
549 public String getLanguage() {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
550 NodeInfo info = getClass().getAnnotation(NodeInfo.class);
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
551 if (info != null && info.language() != null && info.language().length() > 0) {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
552 return info.language();
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
553 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
554 if (parent != null) {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
555 return parent.getLanguage();
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
556 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
557 return "";
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
558 }
19606
d344d76b7b6d Truffle: Node cleanup
Andreas Woess <andreas.woess@oracle.com>
parents: 19247
diff changeset
559
d344d76b7b6d Truffle: Node cleanup
Andreas Woess <andreas.woess@oracle.com>
parents: 19247
diff changeset
560 private static final Object GIL = new Object();
19767
e6a4ba0980dd 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>
parents: 19758
diff changeset
561
19979
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
562 private static final ThreadLocal<Integer> IN_ATOMIC_BLOCK = new ThreadLocal<Integer>() {
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
563 @Override
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
564 protected Integer initialValue() {
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
565 return 0;
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
566 }
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
567 };
19767
e6a4ba0980dd 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>
parents: 19758
diff changeset
568
e6a4ba0980dd 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>
parents: 19758
diff changeset
569 private static boolean inAtomicBlock() {
19979
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
570 return IN_ATOMIC_BLOCK.get() > 0;
19767
e6a4ba0980dd 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>
parents: 19758
diff changeset
571 }
e6a4ba0980dd 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>
parents: 19758
diff changeset
572
e6a4ba0980dd 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>
parents: 19758
diff changeset
573 private static boolean enterAtomic() {
19979
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
574 IN_ATOMIC_BLOCK.set(IN_ATOMIC_BLOCK.get() + 1);
19767
e6a4ba0980dd 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>
parents: 19758
diff changeset
575 return true;
e6a4ba0980dd 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>
parents: 19758
diff changeset
576 }
e6a4ba0980dd 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>
parents: 19758
diff changeset
577
e6a4ba0980dd 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>
parents: 19758
diff changeset
578 private static boolean exitAtomic() {
e6a4ba0980dd 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>
parents: 19758
diff changeset
579 IN_ATOMIC_BLOCK.set(IN_ATOMIC_BLOCK.get() - 1);
e6a4ba0980dd 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>
parents: 19758
diff changeset
580 return true;
e6a4ba0980dd 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>
parents: 19758
diff changeset
581 }
7267
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
582 }