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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/InvocationSocket.java @ 1423:760213a60e8b

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* rewrite of the code installation * partial support for safepoints * macro-based CiTargetMethod interface * code stub support
author Lukas Stadler <lukas.stadler@oracle.com>
date Mon, 16 Aug 2010 18:59:36 -0700
parents
children 9e5e83ca2259
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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 that is
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5 * described in this document. In particular, and without limitation, these intellectual property rights may include one
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6 * or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent
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7 * 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 Microsystems, Inc. standard
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10 * license agreement and applicable provisions of the FAR and its supplements.
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11 *
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12 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or registered
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13 * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks are used under license and
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14 * are trademarks or registered trademarks of SPARC International, Inc. in the U.S. and other countries.
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15 *
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16 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open Company, Ltd.
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17 */
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18 package com.sun.hotspot.c1x;
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19
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20 import java.io.*;
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21 import java.lang.reflect.*;
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22
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23 import com.sun.hotspot.c1x.logging.*;
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24
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25 /**
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26 * A java.lang.reflect proxy that communicates over a socket connection.
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27 *
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28 * Calling a method sends the method name and the parameters through the socket. Afterwards this class waits for a result.
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29 * 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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30 * Method invocation can thus be recursive.
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31 *
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32 * @author Lukas Stadler
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33 */
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34 public class InvocationSocket implements InvocationHandler {
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35
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36 private final ObjectOutputStream output;
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37 private final ObjectInputStream input;
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38 private Object delegate;
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39
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40 public InvocationSocket(ObjectOutputStream output, ObjectInputStream input) {
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41 this.output = output;
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42 this.input = input;
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43 }
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44
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45 public void setDelegate(Object delegate) {
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46 this.delegate = delegate;
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47 }
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48
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49 private static class Invocation implements Serializable {
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50
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51 public String methodName;
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52 public Object[] args;
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53
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54 public Invocation(String methodName, Object[] args) {
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55 this.methodName = methodName;
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56 this.args = args;
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57 }
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58 }
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59
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60 private static class Result implements Serializable {
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61
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62 public Object result;
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63
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64 public Result(Object result) {
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65 this.result = result;
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66 }
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67 }
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68
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69 @Override
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70 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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71 try {
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72 Logger.startScope("invoking remote " + method.getName());
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73 output.writeObject(new Invocation(method.getName(), args));
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74 output.flush();
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75 return waitForResult();
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76 } catch (Throwable t) {
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77 t.printStackTrace();
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78 throw t;
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79 } finally {
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80 Logger.endScope("");
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81 }
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82 }
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83
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84 public Object waitForResult() throws IOException, ClassNotFoundException {
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85 while (true) {
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86 Object in = input.readObject();
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87 if (in instanceof Result)
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88 return ((Result) in).result;
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89 if (in instanceof RuntimeException)
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90 throw (RuntimeException) in;
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91 if (in instanceof Throwable)
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92 throw new RuntimeException((Throwable) in);
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93
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94 Invocation invoke = (Invocation) in;
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95 Method method = null;
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96 for (Method m : delegate.getClass().getDeclaredMethods()) {
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97 if (invoke.methodName.equals(m.getName())) {
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98 method = m;
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99 break;
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100 }
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101 }
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102 if (method == null) {
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103 Exception e = new UnsupportedOperationException("unknown method " + invoke.methodName);
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104 e.printStackTrace();
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105 output.writeObject(e);
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106 output.flush();
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107 } else {
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108 Object result;
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109 try {
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110 Logger.startScope("invoking local " + invoke.methodName);
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111 if (invoke.args == null) {
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112 result = method.invoke(delegate);
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113 } else {
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114 result = method.invoke(delegate, invoke.args);
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115 }
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116 result = new Result(result);
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117 } catch (IllegalArgumentException e) {
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118 System.out.println("error while invoking " + invoke.methodName);
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119 e.getCause().printStackTrace();
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120 result = e.getCause();
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121 } catch (InvocationTargetException e) {
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122 System.out.println("error while invoking " + invoke.methodName);
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123 e.getCause().printStackTrace();
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124 result = e.getCause();
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125 } catch (IllegalAccessException e) {
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126 System.out.println("error while invoking " + invoke.methodName);
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127 e.getCause().printStackTrace();
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128 result = e.getCause();
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129 } finally {
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130 Logger.endScope("");
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131 }
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132 output.writeObject(result);
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133 output.flush();
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134 }
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135 }
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136 }
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137
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138 }