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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/InvocationSocket.java @ 2295:160aacf936ad

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removed last instances of RiType.javaClass, small changes to InvocationSocket and ReplacingStreams to make remote compilation work
author Lukas Stadler <lukas.stadler@jku.at>
date Tue, 12 Apr 2011 16:58:56 +0200
parents 6190d20bd6d6
children 34354e2e40a3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 import java.util.*;
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26
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27 import com.sun.hotspot.c1x.logging.*;
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28
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29 /**
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30 * A collection of java.lang.reflect proxies that communicate over a socket connection.
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31 *
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32 * Calling a method sends the method name and the parameters through the socket. Afterwards this class waits for a
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33 * result. While waiting for a result three types of objects can arrive through the socket: a method invocation, a
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34 * method result or an exception. Method invocation can thus be recursive.
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35 *
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36 * @author Lukas Stadler
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37 */
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38 public class InvocationSocket {
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39
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40 private static final boolean DEBUG = false;
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41 private static final boolean COUNT_CALLS = false;
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42
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43 private static final HashSet<String> cachedMethodNames = new HashSet<String>();
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44 private static final HashSet<String> forbiddenMethodNames = new HashSet<String>();
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45
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46 static {
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47 cachedMethodNames.add("name");
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48 cachedMethodNames.add("kind");
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49 cachedMethodNames.add("isResolved");
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50 cachedMethodNames.add("getVMEntries");
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51 cachedMethodNames.add("exactType");
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52 cachedMethodNames.add("isInitialized");
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53 forbiddenMethodNames.add("javaClass");
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54 }
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55
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56 private final ObjectOutputStream output;
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57 private final ObjectInputStream input;
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58
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59 private final Map<String, Integer> counts = new HashMap<String, Integer>();
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60
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61 public InvocationSocket(ObjectOutputStream output, ObjectInputStream input) {
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62 this.output = output;
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63 this.input = input;
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64
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65 if (COUNT_CALLS) {
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66 Runtime.getRuntime().addShutdownHook(new Thread() {
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67 @Override
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68 public void run() {
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69 SortedMap<Integer, String> sorted = new TreeMap<Integer, String>();
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70 for (Map.Entry<String, Integer> entry : counts.entrySet()) {
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71 sorted.put(entry.getValue(), entry.getKey());
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72 }
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73 for (Map.Entry<Integer, String> entry : sorted.entrySet()) {
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74 System.out.println(entry.getKey() + ": " + entry.getValue());
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75 }
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76 }
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77 });
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78 }
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79 }
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80
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81 /**
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82 * Represents one invocation of a method that is transferred via the socket connection.
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83 *
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84 * @author Lukas Stadler
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85 */
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86 private static class Invocation implements Serializable {
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87
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88 public Object receiver;
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89 public String methodName;
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90 public Object[] args;
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91
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92 public Invocation(Object receiver, String methodName, Object[] args) {
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93 this.receiver = receiver;
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94 this.methodName = methodName;
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95 this.args = args;
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96 }
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97 }
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98
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99 /**
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100 * Represents the result of an invocation that is transferred via the socket connection.
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101 *
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102 * @author Lukas Stadler
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103 */
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104 private static class Result implements Serializable {
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105
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106 public Object result;
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107
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108 public Result(Object result) {
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109 this.result = result;
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110 }
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111 }
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112
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113 private void incCount(String name, Object[] args) {
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114 if (COUNT_CALLS) {
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115 name = name + (args == null ? 0 : args.length);
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116 if (counts.get(name) != null) {
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diff changeset
117 counts.put(name, counts.get(name) + 1);
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118 } else {
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diff changeset
119 counts.put(name, 1);
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120 }
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121 }
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122 }
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diff changeset
123
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124 /**
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125 * Each instance of this class handles remote invocations for one instance of a Remote class. It will forward all
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126 * interface methods to the other end of the socket and cache the results of calls to certain methods.
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127 *
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128 * @author Lukas Stadler
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129 */
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130 public class Handler implements InvocationHandler {
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131
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132 private final Object receiver;
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133 private final HashMap<String, Object> cache = new HashMap<String, Object>();
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134
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135 public Handler(Object receiver) {
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136 this.receiver = receiver;
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137 }
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138
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139 @Override
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140 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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141 // only interface methods can be transferred, java.lang.Object methods
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142 if (method.getDeclaringClass() == Object.class) {
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143 return method.invoke(receiver, args);
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144 }
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145 String methodName = method.getName();
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146 // check if the result of this zero-arg method was cached
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147 if (args == null || args.length == 0) {
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148 if (cache.containsKey(methodName)) {
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diff changeset
149 return cache.get(methodName);
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150 }
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151 }
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diff changeset
152 if (forbiddenMethodNames.contains(methodName)) {
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153 throw new IllegalAccessException(methodName + " not allowed");
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154 }
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diff changeset
155 try {
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diff changeset
156 if (DEBUG) {
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diff changeset
157 Logger.startScope("invoking remote " + methodName);
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158 }
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diff changeset
159 incCount(methodName, args);
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diff changeset
160
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diff changeset
161 output.writeObject(new Invocation(receiver, methodName, args));
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162 output.flush();
2295
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diff changeset
163 Object result = waitForResult();
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diff changeset
164
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165 // result caching for selected methods
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diff changeset
166 if ((args == null || args.length == 0) && cachedMethodNames.contains(methodName)) {
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diff changeset
167 cache.put(methodName, result);
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168 }
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diff changeset
169 return result;
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diff changeset
170 } catch (Throwable t) {
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diff changeset
171 t.printStackTrace();
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diff changeset
172 throw t;
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diff changeset
173 } finally {
2295
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diff changeset
174 if (DEBUG) {
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diff changeset
175 Logger.endScope("");
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diff changeset
176 }
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177 }
1423
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diff changeset
178 }
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parents:
diff changeset
179 }
760213a60e8b * rewrite of the code installation
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parents:
diff changeset
180
2295
160aacf936ad removed last instances of RiType.javaClass, small changes to InvocationSocket and ReplacingStreams to make remote compilation work
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diff changeset
181 /**
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diff changeset
182 * Waits for the result of a remote method invocation. Invocations that should be executed in this VM might arrive
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diff changeset
183 * while waiting for the result, and these invocations will be executed before again waiting fort he result.
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diff changeset
184 */
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diff changeset
185 public Object waitForResult() throws IOException, ClassNotFoundException {
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diff changeset
186 while (true) {
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diff changeset
187 Object in = input.readObject();
1437
9e5e83ca2259 Enabled -C1X:OPTIONS when running HotSpot/C1X. Enabled checkstyle for the HotSpotVM Java project.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents: 1423
diff changeset
188 if (in instanceof Result) {
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diff changeset
189 return ((Result) in).result;
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diff changeset
190 } else if (in instanceof RuntimeException) {
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diff changeset
191 throw (RuntimeException) in;
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diff changeset
192 } else if (in instanceof Throwable) {
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diff changeset
193 throw new RuntimeException((Throwable) in);
1437
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diff changeset
194 }
1423
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195
760213a60e8b * rewrite of the code installation
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diff changeset
196 Invocation invoke = (Invocation) in;
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diff changeset
197 Method method = null;
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198 for (Class<?> clazz = invoke.receiver.getClass(); clazz != null; clazz = clazz.getSuperclass()) {
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diff changeset
199 for (Method m : clazz.getDeclaredMethods()) {
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diff changeset
200 if (invoke.methodName.equals(m.getName())) {
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diff changeset
201 method = m;
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diff changeset
202 break;
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diff changeset
203 }
1423
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diff changeset
204 }
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parents:
diff changeset
205 }
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parents:
diff changeset
206 if (method == null) {
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parents:
diff changeset
207 Exception e = new UnsupportedOperationException("unknown method " + invoke.methodName);
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diff changeset
208 e.printStackTrace();
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diff changeset
209 output.writeObject(e);
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diff changeset
210 output.flush();
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parents:
diff changeset
211 } else {
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parents:
diff changeset
212 Object result;
760213a60e8b * rewrite of the code installation
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parents:
diff changeset
213 try {
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parents:
diff changeset
214 if (invoke.args == null) {
2295
160aacf936ad removed last instances of RiType.javaClass, small changes to InvocationSocket and ReplacingStreams to make remote compilation work
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diff changeset
215 if (DEBUG) {
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diff changeset
216 Logger.startScope("invoking local " + invoke.methodName);
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diff changeset
217 }
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diff changeset
218 result = method.invoke(invoke.receiver);
1423
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diff changeset
219 } else {
2295
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diff changeset
220 if (Logger.ENABLED && DEBUG) {
2289
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parents: 2288
diff changeset
221 StringBuilder str = new StringBuilder();
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
222 str.append("invoking local " + invoke.methodName + "(");
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
223 for (int i = 0; i < invoke.args.length; i++) {
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
224 str.append(i == 0 ? "" : ", ");
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
225 str.append(Logger.pretty(invoke.args[i]));
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
226 }
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
227 str.append(")");
Lukas Stadler <lukas.stadler@jku.at>
parents: 2288
diff changeset
228 Logger.startScope(str.toString());
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diff changeset
229 }
8c426c2891c8 client/server: new interface Remote marks classes that should not be serialized, but called remotely
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diff changeset
230 result = method.invoke(invoke.receiver, invoke.args);
1423
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parents:
diff changeset
231 }
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232 result = new Result(result);
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233 } catch (IllegalArgumentException e) {
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234 System.out.println("error while invoking " + invoke.methodName);
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235 e.getCause().printStackTrace();
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236 result = e.getCause();
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237 } catch (InvocationTargetException e) {
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238 System.out.println("error while invoking " + invoke.methodName);
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239 e.getCause().printStackTrace();
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240 result = e.getCause();
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241 } catch (IllegalAccessException e) {
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242 System.out.println("error while invoking " + invoke.methodName);
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243 e.getCause().printStackTrace();
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244 result = e.getCause();
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245 } finally {
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246 if (DEBUG) {
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247 Logger.endScope("");
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248 }
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249 }
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250 output.writeObject(result);
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251 output.flush();
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252 }
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253 }
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254 }
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255
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256 /**
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257 * Sends a result without invoking a method, used by CompilationServer startup code.
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258 */
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259 public void sendResult(Object obj) throws IOException {
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260 output.writeObject(new Result(obj));
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261 output.flush();
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262 }
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263 }