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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLContext.java @ 16958:997899955e72

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Instrumentation: removed ExecutionContext parameter from probe method in Instrumentable SL/Instrumentation: SLRootNode's now store SLContext. New method added to SLStatementNode to find the root node and get its SLContext
author David Piorkowski <david.piorkowski@oracle.com>
date Tue, 26 Aug 2014 11:00:30 -0700
parents 7661cc464239
children e01b0b9a5f88
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, 2014, 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.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl.runtime;
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24
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25 import java.io.*;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.dsl.*;
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29 import com.oracle.truffle.api.frame.*;
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30 import com.oracle.truffle.api.instrument.*;
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31 import com.oracle.truffle.api.nodes.*;
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32 import com.oracle.truffle.api.source.*;
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33 import com.oracle.truffle.sl.*;
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34 import com.oracle.truffle.sl.builtins.*;
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35 import com.oracle.truffle.sl.nodes.*;
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36 import com.oracle.truffle.sl.nodes.local.*;
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37 import com.oracle.truffle.sl.parser.*;
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38
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39 /**
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40 * The run-time state of SL during execution. One context is instantiated before any source code is
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41 * parsed, and this context is passed around to all methods that need access to it. For example, the
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42 * context is used during {@link SLNodeFactory parsing} and by {@link SLBuiltinNode#getContext()
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43 * builtin functions}.
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44 * <p>
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45 * It would be an error to have two different context instances during the execution of one script.
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46 * However, if two separate scripts run in one Java VM at the same time, they have a different
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47 * context. Therefore, the context is not a singleton.
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48 */
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49 public final class SLContext extends ExecutionContext {
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50 private final BufferedReader input;
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51 private final PrintStream output;
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52 private final SLFunctionRegistry functionRegistry;
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53 private SourceCallback sourceCallback = null;
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54
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55 public SLContext(BufferedReader input, PrintStream output) {
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56 this.input = input;
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57 this.output = output;
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58 this.functionRegistry = new SLFunctionRegistry();
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59 installBuiltins();
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60 }
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61
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62 @Override
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63 public String getLanguageShortName() {
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64 return "Simple";
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65 }
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66
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67 @Override
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68 public void setSourceCallback(SourceCallback sourceCallback) {
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69 this.sourceCallback = sourceCallback;
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70 }
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71
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72 /**
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73 * Returns the default input, i.e., the source for the {@link SLReadlnBuiltin}. To allow unit
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74 * testing, we do not use {@link System#in} directly.
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75 */
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76 public BufferedReader getInput() {
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77 return input;
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78 }
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79
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80 /**
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81 * The default default, i.e., the output for the {@link SLPrintlnBuiltin}. To allow unit
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82 * testing, we do not use {@link System#out} directly.
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83 */
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84 public PrintStream getOutput() {
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85 return output;
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86 }
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87
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88 /**
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89 * Returns the registry of all functions that are currently defined.
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90 */
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91 public SLFunctionRegistry getFunctionRegistry() {
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92 return functionRegistry;
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93 }
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94
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95 public SourceCallback getSourceCallback() {
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96 return sourceCallback;
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97 }
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98
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99 /**
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100 * Adds all builtin functions to the {@link SLFunctionRegistry}. This method lists all
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101 * {@link SLBuiltinNode builtin implementation classes}.
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102 */
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103 private void installBuiltins() {
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104 installBuiltin(SLReadlnBuiltinFactory.getInstance());
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105 installBuiltin(SLPrintlnBuiltinFactory.getInstance());
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106 installBuiltin(SLNanoTimeBuiltinFactory.getInstance());
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107 installBuiltin(SLDefineFunctionBuiltinFactory.getInstance());
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108 installBuiltin(SLStackTraceBuiltinFactory.getInstance());
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109 installBuiltin(SLHelloEqualsWorldBuiltinFactory.getInstance());
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110 }
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111
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112 private void installBuiltin(NodeFactory<? extends SLBuiltinNode> factory) {
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113 /*
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114 * The builtin node factory is a class that is automatically generated by the Truffle DSL.
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115 * The signature returned by the factory reflects the signature of the @Specialization
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116 * methods in the builtin classes.
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117 */
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118 int argumentCount = factory.getExecutionSignature().size();
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119 SLExpressionNode[] argumentNodes = new SLExpressionNode[argumentCount];
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120 /*
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121 * Builtin functions are like normal functions, i.e., the arguments are passed in as an
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122 * Object[] array encapsulated in SLArguments. A SLReadArgumentNode extracts a parameter
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123 * from this array.
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124 */
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125 for (int i = 0; i < argumentCount; i++) {
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126 argumentNodes[i] = new SLReadArgumentNode(null, i);
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127 }
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128 /* Instantiate the builtin node. This node performs the actual functionality. */
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129 SLBuiltinNode builtinBodyNode = factory.createNode(argumentNodes, this);
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130 /* The name of the builtin function is specified via an annotation on the node class. */
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131 String name = builtinBodyNode.getClass().getAnnotation(NodeInfo.class).shortName();
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132 /* Wrap the builtin in a RootNode. Truffle requires all AST to start with a RootNode. */
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133 SLRootNode rootNode = new SLRootNode(this, new FrameDescriptor(), builtinBodyNode, name);
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134
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135 /* Register the builtin function in our function registry. */
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136 getFunctionRegistry().register(name, rootNode);
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137 }
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138
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139 /**
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140 * This function will parse the given source code, parse the code using the {@link Parser}, and
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141 * then execute the function named main. To use this method with instrumentation,
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142 * setASTNodeProber must have been already called. There is currently no guard to check if this
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143 * is the case. <br/>
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144 * Due to the experimental nature of the instrumentation framework, the parse that happens in
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145 * this method will remove any previously added instrumentation.
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146 *
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147 * @param source The {@link Source} to execute.
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148 */
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149 public void executeMain(Source source) {
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150
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151 if (sourceCallback != null) {
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152 sourceCallback.startLoading(source);
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153 }
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154
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155 Parser.parseSL(this, source);
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156
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157 if (sourceCallback != null) {
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158 sourceCallback.endLoading(source);
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159 }
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160
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161 SLFunction main = getFunctionRegistry().lookup("main");
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162 if (main.getCallTarget() == null) {
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163 throw new SLException("No function main() defined in SL source file.");
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164 }
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165 main.getCallTarget().call();
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166 }
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167 }