Mercurial > hg > graal-compiler

annotate graal/com.oracle.max.graal.hotspot/src/com/oracle/graal/hotspot/server/ReplacingStreams.java @ 5060:4ed4295ce15f

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Update import statements.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 08 Mar 2012 19:11:12 +0100
parents ed559a528128
children
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1 /*
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2 * Copyright (c) 2011, 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.graal.hotspot.server;
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24
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25 import java.io.*;
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26 import java.lang.reflect.*;
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27 import java.util.*;
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28
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29 import com.oracle.max.cri.ci.*;
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30 import com.oracle.graal.hotspot.*;
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31
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32 public class ReplacingStreams {
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33
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34 private IdentityHashMap<Object, Placeholder> objectMap = new IdentityHashMap<>();
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35 private ArrayList<Object> objectList = new ArrayList<>();
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36
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37 private ReplacingOutputStream output;
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38 private ReplacingInputStream input;
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39
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40 private InvocationSocket invocation;
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41
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42 public ReplacingStreams(OutputStream outputStream, InputStream inputStream) throws IOException {
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43 output = new ReplacingOutputStream(new BufferedOutputStream(outputStream));
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44 // required, because creating an ObjectOutputStream writes a header, but doesn't flush the stream
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45 output.flush();
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46 input = new ReplacingInputStream(new BufferedInputStream(inputStream));
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47 invocation = new InvocationSocket(output, input);
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48
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49 addStaticObject(CiValue.IllegalValue);
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50 addStaticObject(HotSpotProxy.DUMMY_CONSTANT_OBJ);
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51 }
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52
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53 public void setInvocationSocket(InvocationSocket invocation) {
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54 this.invocation = invocation;
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55 }
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56
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57 public ReplacingOutputStream getOutput() {
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58 return output;
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59 }
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60
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61 public ReplacingInputStream getInput() {
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62 return input;
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63 }
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64
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65 public InvocationSocket getInvocation() {
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66 return invocation;
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67 }
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68
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69 private void addStaticObject(Object obj) {
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70 int id = objectList.size();
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71 objectList.add(obj);
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72 objectMap.put(obj, new Placeholder(id));
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73 }
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74
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75 public static class Placeholder implements Serializable {
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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 private static final long serialVersionUID = 6071894297788156945L;
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81 public final int id;
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82
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83 public Placeholder(int id) {
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84 this.id = id;
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85 }
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86
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87 @Override
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88 public String toString() {
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89 return "#<" + id + ">";
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90 }
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91 }
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92
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93 public static class NewRemoteCallPlaceholder implements Serializable {
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94
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95 /**
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96 *
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97 */
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98 private static final long serialVersionUID = 3084101671389500206L;
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99 public final Class<?>[] interfaces;
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100
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101 public NewRemoteCallPlaceholder(Class<?>[] interfaces) {
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102 this.interfaces = interfaces;
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103 }
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104 }
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105
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106 public static class NewDummyPlaceholder implements Serializable {
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107
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108 /**
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109 *
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110 */
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111 private static final long serialVersionUID = 2692666726573532288L;
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112 }
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113
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114 /**
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115 * Replaces certain cir objects that cannot easily be made Serializable.
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116 */
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117 public class ReplacingInputStream extends ObjectInputStream {
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118
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119 public ReplacingInputStream(InputStream in) throws IOException {
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120 super(in);
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121 enableResolveObject(true);
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122 }
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123
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124 @Override
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125 protected Object resolveObject(Object obj) throws IOException {
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126 // see ReplacingInputStream.replaceObject for details on when these types of objects are created
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127
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128 if (obj instanceof Placeholder) {
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129 Placeholder placeholder = (Placeholder) obj;
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130 Object resolvedObj = objectList.get(placeholder.id);
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131 return resolvedObj;
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132 }
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133
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134 if (obj instanceof NewRemoteCallPlaceholder) {
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135 NewRemoteCallPlaceholder newPlaceholder = (NewRemoteCallPlaceholder) obj;
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136 Placeholder placeholder = new Placeholder(objectList.size());
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137 Object resolvedObj = Proxy.newProxyInstance(getClass().getClassLoader(), newPlaceholder.interfaces, invocation.new Handler(placeholder));
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138 objectMap.put(resolvedObj, placeholder);
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139 objectList.add(resolvedObj);
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140 return resolvedObj;
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141 }
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142
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143 if (obj instanceof NewDummyPlaceholder) {
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144 Object resolvedObj = new Placeholder(objectList.size());
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145 objectMap.put(resolvedObj, (Placeholder) resolvedObj);
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146 objectList.add(resolvedObj);
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147 return resolvedObj;
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148 }
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149
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150 return obj;
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151 }
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152 }
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153
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154 /**
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155 * Replaces certain cir objects that cannot easily be made Serializable.
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156 */
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157 public class ReplacingOutputStream extends ObjectOutputStream {
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158
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159 public ReplacingOutputStream(OutputStream out) throws IOException {
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160 super(out);
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161 enableReplaceObject(true);
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162 }
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163
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164 @Override
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165 protected Object replaceObject(Object obj) throws IOException {
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166 // is the object a known instance?
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167 Placeholder placeholder = objectMap.get(obj);
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168 if (placeholder != null) {
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169 return placeholder;
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170 }
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171
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172 // is the object an instance of a class that will always be executed remotely?
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173 if (obj instanceof Remote) {
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174 return createRemoteCallPlaceholder(obj);
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175 }
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176
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177 // is the object a constant of object type?
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178 if (obj.getClass() == CiConstant.class) {
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179 CiConstant constant = (CiConstant) obj;
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180 if (constant.kind != CiKind.Object) {
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181 return obj;
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182 }
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183 Object contents = constant.asObject();
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184 if (contents == null) {
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185 return obj;
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186 }
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187 // don't replace if the object already is a placeholder
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188 if (contents instanceof Placeholder || contents instanceof Long) {
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189 return obj;
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190 }
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191 placeholder = objectMap.get(contents);
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192 if (placeholder != null) {
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193 return CiConstant.forObject(placeholder);
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194 }
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195 if (contents instanceof Remote) {
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196 return CiConstant.forObject(createRemoteCallPlaceholder(contents));
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197 }
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198 return CiConstant.forObject(createDummyPlaceholder(contents));
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199 }
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200 return obj;
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201 }
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202 }
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203
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204 public static Class<?>[] getAllInterfaces(Class<?> clazz) {
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205 HashSet<Class< ? >> interfaces = new HashSet<>();
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206 getAllInterfaces(clazz, interfaces);
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207 return interfaces.toArray(new Class<?>[interfaces.size()]);
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208 }
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209
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210 private static void getAllInterfaces(Class<?> clazz, HashSet<Class<?>> interfaces) {
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211 for (Class< ? > iface : clazz.getInterfaces()) {
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212 if (!interfaces.contains(iface)) {
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213 interfaces.add(iface);
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214 getAllInterfaces(iface, interfaces);
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215 }
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216 }
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217 if (clazz.getSuperclass() != null) {
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218 getAllInterfaces(clazz.getSuperclass(), interfaces);
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219 }
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220 }
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221
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222 private Object createRemoteCallPlaceholder(Object obj) {
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223 // collect all interfaces that this object's class implements (proxies only support interfaces)
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224 objectMap.put(obj, new Placeholder(objectList.size()));
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225 objectList.add(obj);
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226 return new NewRemoteCallPlaceholder(getAllInterfaces(obj.getClass()));
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227 }
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228
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229 public Object createDummyPlaceholder(Object obj) {
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230 objectMap.put(obj, new Placeholder(objectList.size()));
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diff changeset
231 objectList.add(obj);
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diff changeset
232 return new NewDummyPlaceholder();
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diff changeset
233 }
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diff changeset
234 }