1 /* |
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2 * Copyright (c) 2003, 2013, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package build.tools.makeclasslist; |
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27 |
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28 import java.io.*; |
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29 import java.util.*; |
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30 import java.util.jar.*; |
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31 |
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32 /** Reads a set of files containing the output of java |
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33 -XX:+TraceClassLoadingPreorder runs. Finds all classes that were |
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34 loaded from the bootstrap class path by comparing the prefix of |
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35 the load path to the current JRE's java.home system property. |
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36 Prints the names of these classes to stdout. |
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37 */ |
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38 |
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39 public class MakeClasslist { |
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40 public static void main(String[] args) throws IOException { |
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41 List<String> classes = new ArrayList<>(); |
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42 String origJavaHome = System.getProperty("java.home"); |
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43 String javaHome = origJavaHome.toLowerCase(); |
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44 if (javaHome.endsWith("jre")) { |
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45 origJavaHome = origJavaHome.substring(0, origJavaHome.length() - 4); |
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46 javaHome = javaHome.substring(0, javaHome.length() - 4); |
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47 } |
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48 for (int i = 0; i < args.length; i++) { |
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49 try { |
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50 File file = new File(args[i]); |
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51 BufferedReader reader = new BufferedReader(new FileReader(file)); |
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52 String line = null; |
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53 while ((line = reader.readLine()) != null) { |
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54 StringTokenizer tok = new StringTokenizer(line, "[ \t\n\r\f"); |
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55 if (tok.hasMoreTokens()) { |
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56 String t = tok.nextToken(); |
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57 // Understand only "Loading" from -XX:+TraceClassLoadingPreorder. |
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58 // This ignores old "Loaded" from -verbose:class to force correct |
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59 // classlist generation on Mustang. |
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60 if (t.equals("Loading")) { |
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61 t = tok.nextToken(); |
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62 t = t.replace('.', '/'); |
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63 |
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64 // Check to make sure it came from the boot class path |
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65 if (tok.hasMoreTokens()) { |
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66 String tmp = tok.nextToken(); |
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67 if (tmp.equals("from")) { |
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68 if (tok.hasMoreTokens()) { |
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69 tmp = tok.nextToken().toLowerCase(); |
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70 // System.err.println("Loaded " + t + " from " + tmp); |
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71 if (tmp.startsWith(javaHome)) { |
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72 // OK, remember this class for later |
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73 classes.add(t); |
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74 } |
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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 } catch (IOException e) { |
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82 System.err.println("Error reading file " + args[i]); |
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83 throw(e); |
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84 } |
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85 } |
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86 |
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87 Set<String> seenClasses = new HashSet<>(); |
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88 |
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89 for (String str : classes) { |
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90 if (seenClasses.add(str)) { |
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91 System.out.println(str); |
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92 } |
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93 } |
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94 |
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95 // Try to complete certain packages |
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96 // Note: not using this new code yet; need to consider whether the |
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97 // footprint increase is worth any startup gains |
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98 // Note also that the packages considered below for completion are |
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99 // (obviously) platform-specific |
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100 // JarFile rtJar = new JarFile(origJavaHome + File.separator + |
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101 // "jre" + File.separator + |
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102 // "lib" + File.separator + |
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103 // "rt.jar"); |
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104 // completePackage(seenClasses, rtJar, "java/awt"); |
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105 // completePackage(seenClasses, rtJar, "sun/awt"); |
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106 // completePackage(seenClasses, rtJar, "sun/awt/X11"); |
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107 // completePackage(seenClasses, rtJar, "java/awt/im/spi"); |
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108 // completePackage(seenClasses, rtJar, "java/lang"); |
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109 } |
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110 |
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111 private static void completePackage(Set<String> seenClasses, |
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112 JarFile jar, |
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113 String packageName) { |
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114 int len = packageName.length(); |
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115 Enumeration<JarEntry> entries = jar.entries(); |
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116 while (entries.hasMoreElements()) { |
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117 JarEntry entry = entries.nextElement(); |
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118 String name = entry.getName(); |
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119 if (name.startsWith(packageName) && |
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120 name.endsWith(".class") && |
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121 name.lastIndexOf('/') == len) { |
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122 // Trim ".class" from end |
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123 name = name.substring(0, name.length() - 6); |
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124 if (seenClasses.add(name)) { |
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125 System.out.println(name); |
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126 } |
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127 } |
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128 } |
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129 } |
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130 } |
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