Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/jvm/JVMSystemClassLoaderInfo.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
parents
children 6774e2e08d37
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18 package gov.nasa.jpf.jvm;
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19
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20 import gov.nasa.jpf.Config;
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21 import gov.nasa.jpf.JPF;
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22 import gov.nasa.jpf.util.JPFLogger;
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23 import gov.nasa.jpf.vm.ClassFileContainer;
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24 import gov.nasa.jpf.vm.ClassInfo;
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25 import gov.nasa.jpf.vm.ClassLoaderInfo;
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26 import gov.nasa.jpf.vm.ClassParseException;
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27 import gov.nasa.jpf.vm.MethodInfo;
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28 import gov.nasa.jpf.vm.SystemClassLoaderInfo;
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29 import gov.nasa.jpf.vm.VM;
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30 import java.io.File;
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31 import java.io.IOException;
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32
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33 /**
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34 * a SystemClassLoaderInfo that reads standard Java classfiles from *.class and *.jar files, and creates code using a concrete
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35 * value JVM instruction set
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36 */
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37 public class JVMSystemClassLoaderInfo extends SystemClassLoaderInfo {
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38
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39 static JPFLogger log = JPF.getLogger("class");
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40 protected JVMCodeBuilder defaultCodeBuilder;
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41
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42 public JVMSystemClassLoaderInfo (VM vm, int appId) {
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43 super(vm, appId);
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44
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45 defaultCodeBuilder = createDefaultCodeBuilder(config, appId);
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46
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47 // now we can notify
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48 vm.registerClassLoader(this);
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49 }
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50
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51 /**
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52 * override this if you need a different default CodeBuilder
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53 */
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54 protected JVMCodeBuilder createDefaultCodeBuilder (Config config, int appId) {
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55 String key = config.getIndexableKey("jvm.insn_factory.class", appId);
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56 JVMInstructionFactory insnFactory = config.getEssentialInstance(key, JVMInstructionFactory.class);
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57 return new JVMCodeBuilder(insnFactory);
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58 }
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59
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60 @Override
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61 protected ClassFileContainer createClassFileContainer (String spec) {
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62 int i = spec.indexOf(".jar");
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63 if (i > 0) {
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64 // its a jar
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65 int j = i + 4;
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66 int len = spec.length();
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67 String jarPath;
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68 String pathPrefix = null;
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69 File jarFile;
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70 if (j == len) {
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71 // no path prefix, plain jar
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72 jarPath = spec;
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73 } else {
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74 if (spec.charAt(j) == '/') {
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75 pathPrefix = spec.substring(j);
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76 jarPath = spec.substring(0, j);
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77 } else {
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78 return null;
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79 }
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80 }
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81 jarFile = new File(jarPath);
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82 if (jarFile.isFile()) {
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83 try {
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84 return new JarClassFileContainer(jarFile, pathPrefix);
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85 } catch (IOException ix) {
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86 return null;
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87 }
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88 } else {
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89 return null;
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90 }
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91
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92 } else {
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93 // a dir
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94 File dir = new File(spec);
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95 if (dir.isDirectory()) {
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96 return new DirClassFileContainer(dir);
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97 } else {
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98 return null;
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99 }
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100 }
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101 }
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102
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103 protected void addSystemBootClassPath () {
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104 String v = System.getProperty("sun.boot.class.path");
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105 if (v != null) {
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106 for (String pn : v.split(File.pathSeparator)) {
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107 if (pn != null && !pn.isEmpty()) {
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108 ClassFileContainer cfc = createClassFileContainer(pn);
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109 if (cfc != null) {
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110 cp.addClassFileContainer(cfc);
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111 }
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112 }
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113 }
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114 } else {
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115 // Hmm, maybe we are not executing on OpenJDK
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116 }
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117 }
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118
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119 /**
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120 * this is the main method to create the ClassPath, which is called from the ctor
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121 */
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122 @Override
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123 protected void initializeSystemClassPath (VM vm, int appId) {
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124 Config conf = vm.getConfig();
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125 File[] pathElements;
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126
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127 // explicit "classpath[.id]" settings have precedence
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128 pathElements = getPathElements(conf, "classpath", appId);
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129 if (pathElements != null) {
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130 for (File f : pathElements) {
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131 addClassPathElement(f.getAbsolutePath());
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132 }
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133 }
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134
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135 // we optionally append boot_classpath
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136 pathElements = getPathElements(conf, "vm.boot_classpath", appId);
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137 if (pathElements != null) {
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138 for (File f : pathElements) {
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139 if (f.getName().equals("<system>")) {
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140 addSystemBootClassPath();
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141 } else {
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142 addClassPathElement( f.getAbsolutePath());
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143 }
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144 }
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145 }
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146
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147 log.info("collected system classpath: ", cp);
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148 }
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149
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150 /**
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151 * override this if you have different CodeBuilders for different types
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152 * NOTE - this CodeBuilder is not completely initialized yet, clients still have to call startMethod(mi) on it
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153 */
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154 protected JVMCodeBuilder getCodeBuilder (String clsName) {
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155 return defaultCodeBuilder;
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156 }
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157
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158 /**
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159 * used for automatically created code such as AnnotationProxies, direct calls, native calls and run starts
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160 * NOTE - this cannot be called recursively or concurrently
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161 */
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162 protected JVMCodeBuilder getSystemCodeBuilder (ClassFile cf, MethodInfo mi) {
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163 defaultCodeBuilder.reset(cf, mi);
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164 return defaultCodeBuilder;
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165 }
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166
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167 @Override
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168 protected ClassInfo createClassInfo (String clsName, String url, byte[] data, ClassLoaderInfo definingLoader) throws ClassParseException {
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169 ClassFile cf = new ClassFile(data);
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170 JVMCodeBuilder cb = getCodeBuilder(clsName);
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171 ClassInfo ci = new JVMClassInfo(clsName, definingLoader, cf, url, cb);
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172 setAttributes(ci);
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173
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174 return ci;
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175 }
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176 }