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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultTruffleRuntime.java @ 16916:534a87f866dc

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Truffle: new experimental LoopNode API.
author Christian Humer <christian.humer@gmail.com>
date Sat, 23 Aug 2014 19:31:40 +0200
parents ada0a7729b6f
children 5a1d764f6afc
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1 /*
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2 * Copyright (c) 2012, 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.impl;
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26
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27 import java.util.*;
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29 import com.oracle.truffle.api.*;
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30 import com.oracle.truffle.api.frame.*;
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31 import com.oracle.truffle.api.nodes.*;
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32
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33 /**
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34 * Default implementation of the Truffle runtime if the virtual machine does not provide a better
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35 * performing alternative.
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36 * <p>
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37 * This is an implementation-specific class. Do not use or instantiate it. Instead, use
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38 * {@link Truffle#getRuntime()} to retrieve the current {@link TruffleRuntime}.
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39 */
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40 public final class DefaultTruffleRuntime implements TruffleRuntime {
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41
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42 private ThreadLocal<LinkedList<FrameInstance>> stackTraces = new ThreadLocal<>();
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43 private ThreadLocal<FrameInstance> currentFrames = new ThreadLocal<>();
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44
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45 public DefaultTruffleRuntime() {
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46 if (Truffle.getRuntime() != null) {
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47 throw new IllegalArgumentException("Cannot instantiate DefaultTruffleRuntime. Use Truffle.getRuntime() instead.");
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48 }
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49 }
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50
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51 @Override
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52 public String getName() {
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53 return "Default Truffle Runtime";
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54 }
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56 @Override
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57 public RootCallTarget createCallTarget(RootNode rootNode) {
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58 return new DefaultCallTarget(rootNode, this);
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59 }
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60
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61 public DirectCallNode createDirectCallNode(CallTarget target) {
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62 return new DefaultDirectCallNode(target, this);
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63 }
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64
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65 public IndirectCallNode createIndirectCallNode() {
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66 return new DefaultIndirectCallNode();
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67 }
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68
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69 @Override
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70 public VirtualFrame createVirtualFrame(Object[] arguments, FrameDescriptor frameDescriptor) {
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71 return new DefaultVirtualFrame(frameDescriptor, arguments);
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72 }
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73
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74 @Override
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75 public MaterializedFrame createMaterializedFrame(Object[] arguments) {
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76 return createMaterializedFrame(arguments, new FrameDescriptor());
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77 }
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79 @Override
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80 public MaterializedFrame createMaterializedFrame(Object[] arguments, FrameDescriptor frameDescriptor) {
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81 return new DefaultMaterializedFrame(new DefaultVirtualFrame(frameDescriptor, arguments));
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82 }
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83
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84 @Override
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85 public Assumption createAssumption() {
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86 return createAssumption(null);
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87 }
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88
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89 @Override
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90 public Assumption createAssumption(String name) {
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91 return new DefaultAssumption(name);
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92 }
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93
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94 private LinkedList<FrameInstance> getThreadLocalStackTrace() {
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95 LinkedList<FrameInstance> result = stackTraces.get();
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96 if (result == null) {
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97 result = new LinkedList<>();
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98 stackTraces.set(result);
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99 }
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100 return result;
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101 }
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102
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103 public FrameInstance setCurrentFrame(FrameInstance newValue) {
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104 FrameInstance oldValue = currentFrames.get();
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105 currentFrames.set(newValue);
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106 return oldValue;
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107 }
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108
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109 public void pushFrame(FrameInstance frame) {
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110 getThreadLocalStackTrace().addFirst(frame);
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111 }
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112
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113 public void popFrame() {
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114 getThreadLocalStackTrace().removeFirst();
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115 }
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116
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117 @Override
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118 public <T> T iterateFrames(FrameInstanceVisitor<T> visitor) {
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119 T result = null;
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120 for (FrameInstance frameInstance : getThreadLocalStackTrace()) {
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121 result = visitor.visitFrame(frameInstance);
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122 if (result != null) {
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123 return result;
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124 }
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125 }
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126 return result;
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127 }
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128
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129 @Override
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130 public FrameInstance getCallerFrame() {
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131 return getThreadLocalStackTrace().peekFirst();
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132 }
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133
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134 @Override
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135 public FrameInstance getCurrentFrame() {
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136 return currentFrames.get();
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137 }
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138
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139 public void notifyTransferToInterpreter() {
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140 }
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141
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142 public LoopNode createLoopNode(RepeatingNode repeating) {
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143 if (!(repeating instanceof Node)) {
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144 throw new IllegalArgumentException("Repeating node must be of type Node.");
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145 }
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146 return new DefaultLoopNode(repeating);
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147 }
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148 }