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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 19979:f792b4270cb1

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Truffle: simplify inAtomicBlock assertion.
author Christian Humer <christian.humer@oracle.com>
date Fri, 20 Mar 2015 19:00:50 +0100
parents cd59085cf0d8
children 8dc73c226c63
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 @CompilationFinal private Node parent;
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44 @CompilationFinal private SourceSection sourceSection;
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45
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46 /**
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47 * Marks array fields that are children of this node.
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48 */
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49 @Retention(RetentionPolicy.RUNTIME)
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50 @Target({ElementType.FIELD})
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51 public @interface Children {
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52 }
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53
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54 /**
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55 * Marks fields that represent child nodes of this node.
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56 */
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57 @Retention(RetentionPolicy.RUNTIME)
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58 @Target({ElementType.FIELD})
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59 public @interface Child {
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60 }
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61
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62 protected Node() {
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63 this(null);
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64 }
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65
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66 protected Node(SourceSection sourceSection) {
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67 CompilerAsserts.neverPartOfCompilation();
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68 this.sourceSection = sourceSection;
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69 if (TruffleOptions.TraceASTJSON) {
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70 JSONHelper.dumpNewNode(this);
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71 }
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72 }
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73
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74 /**
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75 * Assigns a link to a guest language source section to this node.
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76 *
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77 * @param section the object representing a section in guest language source code
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78 */
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79 public final void assignSourceSection(SourceSection section) {
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80 if (sourceSection != null) {
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81 // Patch this test during the transition to constructor-based
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82 // source attribution, which would otherwise trigger this
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83 // exception. This method will eventually be deprecated.
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84 if (getSourceSection() != section) {
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85 throw new IllegalStateException("Source section is already assigned. Old: " + getSourceSection() + ", new: " + section);
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86 }
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87 }
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88 this.sourceSection = section;
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89 }
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90
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91 /**
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92 * Returns a rough estimate for the cost of this {@link Node}. This estimate can be used by
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93 * runtime systems or guest languages to implement heuristics based on Truffle ASTs. This method
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94 * is intended to be overridden by subclasses. The default implementation returns the value of
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95 * {@link NodeInfo#cost()} of the {@link NodeInfo} annotation declared at the subclass. If no
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96 * {@link NodeInfo} annotation is declared the method returns {@link NodeCost#MONOMORPHIC} as a
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97 * default value.
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98 */
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99 public NodeCost getCost() {
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100 NodeInfo info = getClass().getAnnotation(NodeInfo.class);
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101 if (info != null) {
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102 return info.cost();
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103 }
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104 return NodeCost.MONOMORPHIC;
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105 }
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106
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107 /**
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108 * Clears any previously assigned guest language source code from this node.
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109 */
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110 public final void clearSourceSection() {
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111 this.sourceSection = null;
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112 }
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113
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114 /**
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115 * Retrieves the guest language source code section that is currently assigned to this node.
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116 *
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117 * @return the assigned source code section
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118 */
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119 public final SourceSection getSourceSection() {
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120 return sourceSection;
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121 }
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122
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123 /**
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124 * Retrieves the guest language source code section that is currently assigned to this node.
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125 *
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126 * @return the assigned source code section
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127 */
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128 @ExplodeLoop
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129 public final SourceSection getEncapsulatingSourceSection() {
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130 Node current = this;
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131 while (current != null) {
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132 if (current.sourceSection != null) {
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133 return current.sourceSection;
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134 }
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135 current = current.parent;
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136 }
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137 return null;
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138 }
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139
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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140 /**
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141 * Method that updates the link to the parent in the array of specified new child nodes to this
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142 * node.
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143 *
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144 * @param newChildren the array of new children whose parent should be updated
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145 * @return the array of new children
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146 */
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147 protected final <T extends Node> T[] insert(final T[] newChildren) {
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148 CompilerDirectives.transferToInterpreterAndInvalidate();
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149 assert newChildren != null;
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150 for (Node newChild : newChildren) {
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151 adoptHelper(newChild);
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152 }
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153 return newChildren;
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154 }
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155
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156 /**
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157 * Method that updates the link to the parent in the specified new child node to this node.
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158 *
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159 * @param newChild the new child whose parent should be updated
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160 * @return the new child
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161 */
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162 protected final <T extends Node> T insert(final T newChild) {
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163 CompilerDirectives.transferToInterpreterAndInvalidate();
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164 assert newChild != null;
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165 adoptHelper(newChild);
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166 return newChild;
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167 }
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168
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169 public final void adoptChildren() {
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170 CompilerDirectives.transferToInterpreterAndInvalidate();
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171 adoptHelper();
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172 }
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173
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174 private void adoptHelper(final Node newChild) {
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175 assert newChild != null;
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176 if (newChild == this) {
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177 throw new IllegalStateException("The parent of a node can never be the node itself.");
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178 }
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179 newChild.parent = this;
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180 if (TruffleOptions.TraceASTJSON) {
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181 JSONHelper.dumpNewChild(this, newChild);
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182 }
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183 newChild.adoptHelper();
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184 }
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185
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186 private void adoptHelper() {
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187 Iterable<Node> children = this.getChildren();
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188 for (Node child : children) {
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189 if (child != null && child.getParent() != this) {
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190 this.adoptHelper(child);
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191 }
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192 }
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193 }
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194
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195 private void adoptUnadoptedHelper(final Node newChild) {
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196 assert newChild != null;
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197 if (newChild == this) {
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198 throw new IllegalStateException("The parent of a node can never be the node itself.");
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199 }
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200 newChild.parent = this;
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201 newChild.adoptUnadoptedHelper();
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202 }
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203
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204 private void adoptUnadoptedHelper() {
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205 Iterable<Node> children = this.getChildren();
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206 for (Node child : children) {
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207 if (child != null && child.getParent() == null) {
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208 this.adoptUnadoptedHelper(child);
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209 }
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210 }
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211 }
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212
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213 /**
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214 * Returns properties of this node interesting for debugging and can be overwritten by
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215 * subclasses to add their own custom properties.
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216 *
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217 * @return the properties as a key/value hash map
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218 */
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219 public Map<String, Object> getDebugProperties() {
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220 Map<String, Object> properties = new HashMap<>();
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221 return properties;
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222 }
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223
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224 /**
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225 * The current parent node of this node.
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226 *
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227 * @return the parent node
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228 */
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229 public final Node getParent() {
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230 return parent;
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231 }
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232
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233 /**
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234 * Replaces this node with another node. If there is a source section (see
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235 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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236 *
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237 * @param newNode the new node that is the replacement
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238 * @param reason a description of the reason for the replacement
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239 * @return the new node
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240 */
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241 public final <T extends Node> T replace(final T newNode, final CharSequence reason) {
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242 CompilerDirectives.transferToInterpreterAndInvalidate();
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243 atomic(new Runnable() {
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244 public void run() {
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245 replaceHelper(newNode, reason);
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246 }
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247 });
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248 return newNode;
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249 }
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250
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251 /**
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252 * Replaces this node with another node. If there is a source section (see
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253 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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254 *
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255 * @param newNode the new node that is the replacement
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256 * @return the new node
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257 */
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258 public final <T extends Node> T replace(T newNode) {
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259 return replace(newNode, "");
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260 }
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261
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262 final void replaceHelper(Node newNode, CharSequence reason) {
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263 CompilerAsserts.neverPartOfCompilation();
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264 assert inAtomicBlock();
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265 if (this.getParent() == null) {
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266 throw new IllegalStateException("This node cannot be replaced, because it does not yet have a parent.");
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267 }
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268 if (sourceSection != null && newNode.getSourceSection() == null) {
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269 // Pass on the source section to the new node.
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270 newNode.assignSourceSection(sourceSection);
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271 }
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272 // (aw) need to set parent *before* replace, so that (unsynchronized) getRootNode()
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273 // will always find the root node
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274 newNode.parent = this.parent;
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275 if (NodeUtil.replaceChild(this.parent, this, newNode)) {
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276 this.parent.adoptHelper(newNode);
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277 } else {
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278 this.parent.adoptUnadoptedHelper(newNode);
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279 }
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280 reportReplace(this, newNode, reason);
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281 onReplace(newNode, reason);
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282 }
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283
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284 /**
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285 * Checks if this node can be replaced by another node: tree structure & type.
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286 */
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287 public final boolean isSafelyReplaceableBy(Node newNode) {
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288 return NodeUtil.isReplacementSafe(getParent(), this, newNode);
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289 }
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290
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291 private void reportReplace(Node oldNode, Node newNode, CharSequence reason) {
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292 Node node = this;
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293 while (node != null) {
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294 if (node instanceof ReplaceObserver) {
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295 ((ReplaceObserver) node).nodeReplaced(oldNode, newNode, reason);
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296 } else if (node instanceof RootNode) {
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297 CallTarget target = ((RootNode) node).getCallTarget();
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298 if (target instanceof ReplaceObserver) {
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299 ((ReplaceObserver) target).nodeReplaced(oldNode, newNode, reason);
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300 }
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301 }
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302 node = node.getParent();
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303 }
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304 if (TruffleOptions.TraceRewrites) {
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305 NodeUtil.traceRewrite(this, newNode, reason);
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306 }
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307 if (TruffleOptions.TraceASTJSON) {
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308 JSONHelper.dumpReplaceChild(this, newNode, reason);
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309 }
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310 }
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311
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312 /**
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313 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the
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314 * node is rewritten. This method is invoked before the actual replace has happened.
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315 *
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316 * @param newNode the replacement node
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317 * @param reason the reason the replace supplied
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318 */
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319 protected void onReplace(Node newNode, CharSequence reason) {
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320 // empty default
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321 }
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322
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323 /**
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324 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all
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325 * child nodes.
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326 *
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327 * @param nodeVisitor the visitor
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328 */
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329 public final void accept(NodeVisitor nodeVisitor) {
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330 if (nodeVisitor.visit(this)) {
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331 for (Node child : this.getChildren()) {
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332 if (child != null) {
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333 child.accept(nodeVisitor);
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334 }
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335 }
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336 }
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337 }
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338
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339 /**
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340 * Iterator over the children of this node.
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341 *
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342 * @return the iterator
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343 */
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344 public final Iterable<Node> getChildren() {
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345 return new Iterable<Node>() {
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346 public Iterator<Node> iterator() {
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347 return NodeUtil.makeIterator(Node.this);
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348 }
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349 };
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350 }
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351
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352 /**
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353 * Creates a shallow copy of this node.
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354 *
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355 * @return the new copy
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356 */
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357 public Node copy() {
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358 try {
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359 return (Node) super.clone();
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360 } catch (CloneNotSupportedException e) {
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361 throw new AssertionError(e);
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362 }
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363 }
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364
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365 /**
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366 * Creates a deep copy of this node.
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367 *
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368 * @return the new deep copy
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369 */
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370 public Node deepCopy() {
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371 return NodeUtil.deepCopyImpl(this);
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372 }
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373
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374 /**
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375 * This method must never be called. It enforces that {@link Object#clone} is not directly
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376 * called by subclasses. Use the {@link #copy()} method instead.
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377 */
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378 @Override
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379 @Deprecated
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380 protected final Object clone() throws CloneNotSupportedException {
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381 throw new IllegalStateException("This method should never be called, use the copy method instead!");
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382 }
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383
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384 /**
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385 * Get the root node of the tree a node belongs to.
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386 *
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387 * @return the {@link RootNode} or {@code null} if there is none.
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388 */
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389 public final RootNode getRootNode() {
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390 Node rootNode = this;
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391 while (rootNode.getParent() != null) {
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392 assert !(rootNode instanceof RootNode) : "root node must not have a parent";
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393 rootNode = rootNode.getParent();
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394 }
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395 if (rootNode instanceof RootNode) {
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396 return (RootNode) rootNode;
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397 }
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398 return null;
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399 }
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400
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401 /**
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402 * Any node for which this is {@code true} can be "instrumented" by installing a {@link Probe}
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403 * that intercepts execution events at the node and routes them to any {@link Instrument}s that
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404 * have been attached to the {@link Probe}. Only one {@link Probe} may be installed at each
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405 * node; subsequent calls return the one already installed.
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406 * <p>
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407 * <b>Note:</b> instrumentation requires a appropriate {@link WrapperNode}, which must be
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408 * provided by {@link #createWrapperNode()}.
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409 *
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410 * @see Instrument
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411 */
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412 public boolean isInstrumentable() {
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413 return false;
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414 }
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415
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416 /**
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417 * For any node that {@link #isInstrumentable()}, this method must return a {@link Node} that:
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418 * <ol>
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419 * <li>implements {@link WrapperNode}</li>
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420 * <li>has {@code this} as it's child, and</li>
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421 * <li>whose type is safe for replacement of {@code this} in the parent.</li>
18985
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422 * </ol>
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423 *
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424 * @return an appropriately typed {@link WrapperNode} if {@link #isInstrumentable()}.
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425 */
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426 public WrapperNode createWrapperNode() {
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427 return null;
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parents: 18750
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428 }
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429
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parents: 18750
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430 /**
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parents: 18750
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431 * Enables {@linkplain Instrument instrumentation} of a node, where the node is presumed to be
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
432 * part of a well-formed Truffle AST that is not being executed. If this node has not already
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parents: 18750
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433 * been probed, modifies the AST by inserting a {@linkplain WrapperNode wrapper node} between
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parents: 18750
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434 * the node and its parent; the wrapper node must be provided by implementations of
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parents: 18750
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435 * {@link #createWrapperNode()}. No more than one {@link Probe} may be associated with a node,
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parents: 18750
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436 * so a {@linkplain WrapperNode wrapper} may not wrap another {@linkplain WrapperNode wrapper}.
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437 *
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
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438 * @return a (possibly newly created) {@link Probe} associated with this node.
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parents: 18750
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439 * @throws ProbeException (unchecked) when a probe cannot be created, leaving the AST unchanged
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440 */
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441 public final Probe probe() {
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442
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443 if (this instanceof WrapperNode) {
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444 throw new ProbeException(ProbeFailure.Reason.WRAPPER_NODE, null, this, null);
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445 }
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446
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447 if (parent == null) {
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448 throw new ProbeException(ProbeFailure.Reason.NO_PARENT, null, this, null);
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449 }
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450
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451 if (parent instanceof WrapperNode) {
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452 return ((WrapperNode) parent).getProbe();
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453 }
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454
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parents: 18750
diff changeset
455 if (!isInstrumentable()) {
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456 throw new ProbeException(ProbeFailure.Reason.NOT_INSTRUMENTABLE, parent, this, null);
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
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457 }
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458
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459 // Create a new wrapper/probe with this node as its child.
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parents: 18750
diff changeset
460 final WrapperNode wrapper = createWrapperNode();
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461
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parents: 18750
diff changeset
462 if (wrapper == null || !(wrapper instanceof Node)) {
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
463 throw new ProbeException(ProbeFailure.Reason.NO_WRAPPER, parent, this, wrapper);
867058575979 Truffle: Improved support for "probing" AST nodes:
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464 }
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465
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
466 final Node wrapperNode = (Node) wrapper;
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467
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
468 if (!this.isSafelyReplaceableBy(wrapperNode)) {
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
469 throw new ProbeException(ProbeFailure.Reason.WRAPPER_TYPE, parent, this, wrapper);
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470 }
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diff changeset
471
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
472 // Connect it to a Probe
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
473 final Probe probe = ProbeNode.insertProbe(wrapper);
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
474
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
475 // Replace this node in the AST with the wrapper
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
476 this.replace(wrapperNode);
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477
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diff changeset
478 return probe;
867058575979 Truffle: Improved support for "probing" AST nodes:
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parents: 18750
diff changeset
479 }
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480
867058575979 Truffle: Improved support for "probing" AST nodes:
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diff changeset
481 /**
7267
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parents:
diff changeset
482 * Converts this node to a textual representation useful for debugging.
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
483 */
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
484 @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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
485 public String toString() {
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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parents:
diff changeset
486 StringBuilder sb = new StringBuilder(getClass().getSimpleName());
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parents:
diff changeset
487 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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
488 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>
parents:
diff changeset
489 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.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
490 sb.append(hasProperties ? "," : "<");
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parents:
diff changeset
491 hasProperties = true;
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diff changeset
492 sb.append(entry.getKey()).append("=").append(entry.getValue());
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
493 }
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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parents:
diff changeset
494 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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parents:
diff changeset
495 sb.append(">");
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diff changeset
496 }
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diff changeset
497 sb.append("@").append(Integer.toHexString(hashCode()));
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498 return sb.toString();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
499 }
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ba52fbec5b6c Truffle: atomic node rewriting
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diff changeset
500
ba52fbec5b6c Truffle: atomic node rewriting
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501 public final void atomic(Runnable closure) {
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502 RootNode rootNode = getRootNode();
19606
d344d76b7b6d Truffle: Node cleanup
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diff changeset
503 synchronized (rootNode != null ? rootNode : GIL) {
19767
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parents: 19758
diff changeset
504 assert enterAtomic();
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diff changeset
505 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
506 closure.run();
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parents: 19758
diff changeset
507 } 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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diff changeset
508 assert exitAtomic();
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parents: 19758
diff changeset
509 }
14629
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diff changeset
510 }
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
511 }
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
512
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
513 public final <T> T atomic(Callable<T> closure) {
ba52fbec5b6c Truffle: atomic node rewriting
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diff changeset
514 try {
ba52fbec5b6c Truffle: atomic node rewriting
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diff changeset
515 RootNode rootNode = getRootNode();
19606
d344d76b7b6d Truffle: Node cleanup
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diff changeset
516 synchronized (rootNode != null ? rootNode : GIL) {
19767
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diff changeset
517 assert enterAtomic();
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diff changeset
518 try {
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parents: 19758
diff changeset
519 return closure.call();
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diff changeset
520 } 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
521 assert exitAtomic();
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diff changeset
522 }
14629
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diff changeset
523 }
19606
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Andreas Woess <andreas.woess@oracle.com>
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diff changeset
524 } catch (RuntimeException | Error e) {
14629
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diff changeset
525 throw e;
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diff changeset
526 } catch (Exception e) {
ba52fbec5b6c Truffle: atomic node rewriting
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diff changeset
527 throw new RuntimeException(e);
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diff changeset
528 }
ba52fbec5b6c Truffle: atomic node rewriting
Andreas Woess <andreas.woess@jku.at>
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diff changeset
529 }
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diff changeset
530
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
531 /**
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
532 * 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
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parents: 15474
diff changeset
533 * available.
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
534 */
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
535 public String getDescription() {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
536 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
537 if (info != null) {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
538 return info.description();
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
539 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
540 return "";
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
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 * 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
545 * language is unknown, returns "".
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
546 */
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
547 public String getLanguage() {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
548 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
549 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
550 return info.language();
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
551 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
552 if (parent != null) {
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
553 return parent.getLanguage();
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
554 }
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
555 return "";
4293efaaab76 Add description and language to the NodeInfo annotation
Christian Wirth <christian.wirth@oracle.com>
parents: 15474
diff changeset
556 }
19606
d344d76b7b6d Truffle: Node cleanup
Andreas Woess <andreas.woess@oracle.com>
parents: 19247
diff changeset
557
d344d76b7b6d Truffle: Node cleanup
Andreas Woess <andreas.woess@oracle.com>
parents: 19247
diff changeset
558 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
559
19979
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
560 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
561 @Override
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
562 protected Integer initialValue() {
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
563 return 0;
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
564 }
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
565 };
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
566
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
567 private static boolean inAtomicBlock() {
19979
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
568 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
569 }
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
570
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 private static boolean enterAtomic() {
19979
f792b4270cb1 Truffle: simplify inAtomicBlock assertion.
Christian Humer <christian.humer@oracle.com>
parents: 19975
diff changeset
572 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
573 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
574 }
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
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 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
577 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
578 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
579 }
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
580 }