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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/InvocationSocket.java @ 2284:569d3fe7d65c

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non-static VMEntries and VMExits, CompilationServer simplifications
author Lukas Stadler <lukas.stadler@jku.at>
date Thu, 07 Apr 2011 15:32:25 +0200
parents 9e5e83ca2259
children 8c426c2891c8
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1 /*
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2 * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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5 * that is described in this document. In particular, and without limitation, these intellectual property
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6 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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7 * more additional patents or pending patent applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
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10 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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11 * supplements.
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12 *
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13 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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14 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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15 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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16 * U.S. and other countries.
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17 *
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18 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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19 * Company, Ltd.
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20 */
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21 package com.sun.hotspot.c1x;
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22
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23 import java.io.*;
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24 import java.lang.reflect.*;
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25
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26 import com.sun.hotspot.c1x.logging.*;
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27
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28 /**
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29 * A java.lang.reflect proxy that communicates over a socket connection.
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30 *
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31 * Calling a method sends the method name and the parameters through the socket. Afterwards this class waits for a result.
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32 * While waiting for a result three types of objects can arrive through the socket: a method invocation, a method result or an exception.
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33 * Method invocation can thus be recursive.
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34 *
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35 * @author Lukas Stadler
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36 */
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37 public class InvocationSocket implements InvocationHandler {
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38
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39 private final ObjectOutputStream output;
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40 private final ObjectInputStream input;
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41 private Object delegate;
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42 private DelegateCallback callback;
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43
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44 public InvocationSocket(ObjectOutputStream output, ObjectInputStream input) {
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45 this.output = output;
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46 this.input = input;
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47 }
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48
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49 public void setDelegate(Object delegate) {
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50 this.delegate = delegate;
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51 }
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52
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53 public static interface DelegateCallback {
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54 public Object getDelegate();
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55 }
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56
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57 public void setDelegateCallback(DelegateCallback callback) {
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58 this.callback = callback;
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59 }
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60
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61 private static class Invocation implements Serializable {
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62
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63 public String methodName;
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64 public Object[] args;
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65
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66 public Invocation(String methodName, Object[] args) {
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67 this.methodName = methodName;
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68 this.args = args;
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69 }
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70 }
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71
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72 private static class Result implements Serializable {
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73
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74 public Object result;
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75
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76 public Result(Object result) {
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77 this.result = result;
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78 }
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79 }
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80
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81 @Override
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82 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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83 try {
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84 Logger.startScope("invoking remote " + method.getName());
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85 output.writeObject(new Invocation(method.getName(), args));
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86 output.flush();
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87 return waitForResult();
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88 } catch (Throwable t) {
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89 t.printStackTrace();
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90 throw t;
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91 } finally {
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92 Logger.endScope("");
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93 }
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94 }
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95
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96 public Object waitForResult() throws IOException, ClassNotFoundException {
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97 while (true) {
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98 Object in = input.readObject();
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99 if (in instanceof Result) {
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100 return ((Result) in).result;
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101 } else if (in instanceof RuntimeException) {
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102 throw (RuntimeException) in;
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103 } else if (in instanceof Throwable) {
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104 throw new RuntimeException((Throwable) in);
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105 }
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106
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107 if (delegate == null) {
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108 delegate = callback.getDelegate();
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109 callback = null;
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110 }
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111
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112 Invocation invoke = (Invocation) in;
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113 Method method = null;
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114 for (Method m : delegate.getClass().getDeclaredMethods()) {
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115 if (invoke.methodName.equals(m.getName())) {
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116 method = m;
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117 break;
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118 }
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119 }
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120 if (method == null) {
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121 Exception e = new UnsupportedOperationException("unknown method " + invoke.methodName);
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122 e.printStackTrace();
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123 output.writeObject(e);
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124 output.flush();
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125 } else {
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126 Object result;
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127 try {
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128 Logger.startScope("invoking local " + invoke.methodName);
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129 if (invoke.args == null) {
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130 result = method.invoke(delegate);
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131 } else {
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132 result = method.invoke(delegate, invoke.args);
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133 }
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134 result = new Result(result);
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135 } catch (IllegalArgumentException e) {
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136 System.out.println("error while invoking " + invoke.methodName);
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137 e.getCause().printStackTrace();
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138 result = e.getCause();
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139 } catch (InvocationTargetException e) {
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140 System.out.println("error while invoking " + invoke.methodName);
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141 e.getCause().printStackTrace();
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142 result = e.getCause();
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143 } catch (IllegalAccessException e) {
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144 System.out.println("error while invoking " + invoke.methodName);
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145 e.getCause().printStackTrace();
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146 result = e.getCause();
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147 } finally {
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148 Logger.endScope("");
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149 }
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150 output.writeObject(result);
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151 output.flush();
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152 }
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153 }
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154 }
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155
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156 }