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1 /* |
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2 * CDDL HEADER START |
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3 * |
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4 * The contents of this file are subject to the terms of the |
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
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7 * |
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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9 * or http://www.opensolaris.org/os/licensing. |
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10 * See the License for the specific language governing permissions |
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11 * and limitations under the License. |
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12 * |
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13 * When distributing Covered Code, include this CDDL HEADER in each |
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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15 * If applicable, add the following below this CDDL HEADER, with the |
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16 * fields enclosed by brackets "[]" replaced with your own identifying |
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17 * information: Portions Copyright [yyyy] [name of copyright owner] |
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18 * |
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19 * CDDL HEADER END |
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20 */ |
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21 |
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22 /* |
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23 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
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24 */ |
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25 |
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26 package com.oracle.solaris.vp.util.misc; |
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27 |
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28 import java.io.File; |
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29 import java.net.*; |
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30 import java.security.CodeSource; |
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31 |
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32 /** |
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33 * Common functionality for all com.oracle.solaris subpackages. |
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34 */ |
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35 public class LibraryUtil |
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36 { |
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37 public interface LibraryLoader |
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38 { |
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39 /** |
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40 * A function that calls System.load(filename). |
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41 * Must be implemented in a class loaded by the |
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42 * classloader the native library should be loaded by. |
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43 */ |
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44 public void load(String filename); |
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45 } |
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46 |
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47 /** |
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48 * If the given class comes from jar file with a path of the |
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49 * form path/lib/java/jarfile.jar, returns path/lib. This lets |
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50 * us cleaning find co-located native libraries (i.e. without |
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51 * employing a LD_LIBRARY_PATH-setting wrapper script). |
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52 */ |
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53 static private String classdir(Class c) |
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54 { |
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55 try { |
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56 CodeSource cs = c.getProtectionDomain().getCodeSource(); |
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57 if (cs == null) |
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58 return (null); |
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59 File f = new File(cs.getLocation().toURI()); |
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60 if (!f.getName().endsWith(".jar")) |
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61 return (null); |
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62 |
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63 /* |
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64 * We could obtain the absolute file here, |
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65 * but I don't think we should care about |
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66 * people setting relative class paths while |
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67 * running in lib/ or lib/java/. There's |
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68 * probably greater hazard in assuming we can |
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69 * traverse the absolute path. |
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70 */ |
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71 f = f.getParentFile(); |
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72 if (f == null || !(f.getName() != "java")) |
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73 return (null); |
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74 f = f.getParentFile(); |
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75 if (f == null || !(f.getName() != "lib")) |
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76 return (null); |
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77 |
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78 /* |
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79 * We made it. Return the path. |
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80 * |
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81 * XXX: Contrary to the above comment, |
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82 * Runtime.load() insists that this path be |
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83 * absolute. |
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84 */ |
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85 return (f.getPath()); |
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86 } catch (SecurityException e) { |
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87 /* Couldn't access the protection domain. */ |
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88 return (null); |
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89 } catch (IllegalArgumentException e) { |
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90 /* Code source wasn't a file. */ |
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91 return (null); |
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92 } catch (URISyntaxException e) { |
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93 /* Code source wasn't a file. */ |
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94 return (null); |
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95 } |
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96 } |
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97 |
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98 static private void loadLibrary(LibraryLoader loader, String paths[], |
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99 String name, boolean debug) |
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100 { |
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101 StringBuilder buffer = new StringBuilder(); |
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102 buffer.append("Unable to find ").append(name).append(':'); |
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103 |
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104 for (String p : paths) { |
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105 try { |
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106 String path = p + "/" + name; |
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107 if (loader != null) |
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108 loader.load(path); |
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109 else |
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110 System.load(path); |
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111 if (debug) |
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112 System.err.println("loaded " + name + |
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113 " from " + p); |
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114 return; |
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115 } catch (UnsatisfiedLinkError e) { |
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116 /* |
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117 * Unfortunately, there are many |
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118 * reasons why we might get an |
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119 * UnsatisfiedLinkError, but there is |
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120 * no way to distinguish them other |
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121 * than to case off of their messages. |
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122 * (Of particular interest is the |
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123 * "already loaded" error.) |
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124 * |
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125 * Until we are ready to soil our hands |
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126 * doing so, callers of loadLibrary |
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127 * will get a single, conflated |
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128 * exception. Sigh. |
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129 */ |
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130 buffer.append("\n ").append(p).append(": "). |
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131 append(e.getMessage()); |
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132 |
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133 } |
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134 } |
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135 throw (new UnsatisfiedLinkError(buffer.toString())); |
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136 } |
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137 |
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138 /** |
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139 * Loads a library. |
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140 * <p> |
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141 * System.load() always loads the specified library in the |
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142 * caller's classloader. To permit loading native libraries in |
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143 * classloaders other than LibraryUtil's, the caller may supply |
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144 * an implementation of LibraryLoader defined by the desired |
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145 * classloader. |
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146 */ |
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147 static public void loadLibrary(Class c, LibraryLoader loader, |
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148 String name, boolean debug) |
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149 { |
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150 String path = System.getProperty("java.library.path"); |
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151 String classdir = classdir(c); |
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152 if (classdir != null) |
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153 path = classdir + ":" + classdir + "/64:" + path; |
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154 path = path + ":/usr/lib/64"; /* XXX: Java bug 6254947 */ |
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155 String[] paths = path.split(":"); |
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156 |
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157 if (debug) { |
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158 String root = System.getenv("ROOT"); |
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159 if (root != null && root.length() > 0) { |
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160 System.err.println( |
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161 "Prepending $ROOT to library path."); |
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162 String[] npaths = new String[paths.length * 2]; |
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163 for (int i = 0; i < paths.length; i++) { |
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164 npaths[i] = root + "/" + paths[i]; |
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165 npaths[i + paths.length] = paths[i]; |
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166 } |
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167 paths = npaths; |
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168 } |
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169 } |
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170 |
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171 loadLibrary(loader, paths, name, debug); |
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172 } |
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173 } |