author | ohair |
Wed, 06 Apr 2011 22:06:11 -0700 | |
changeset 9035 | 1255eb81cc2f |
parent 8552 | f36470084574 |
child 10419 | 12c063b39232 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.misc; |
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||
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import java.io.File; |
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import java.io.IOException; |
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import java.io.FilePermission; |
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import java.net.URL; |
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import java.net.URLClassLoader; |
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import java.net.MalformedURLException; |
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import java.net.URLStreamHandler; |
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import java.net.URLStreamHandlerFactory; |
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import java.util.HashSet; |
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import java.util.StringTokenizer; |
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import java.util.Set; |
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import java.util.Vector; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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import java.security.PrivilegedExceptionAction; |
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import java.security.AccessControlContext; |
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import java.security.PermissionCollection; |
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import java.security.Permissions; |
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import java.security.Permission; |
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47 |
import java.security.ProtectionDomain; |
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import java.security.CodeSource; |
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import sun.security.util.SecurityConstants; |
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import sun.net.www.ParseUtil; |
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||
52 |
/** |
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53 |
* This class is used by the system to launch the main application. |
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54 |
Launcher */ |
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55 |
public class Launcher { |
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56 |
private static URLStreamHandlerFactory factory = new Factory(); |
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57 |
private static Launcher launcher = new Launcher(); |
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private static String bootClassPath = |
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System.getProperty("sun.boot.class.path"); |
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public static Launcher getLauncher() { |
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return launcher; |
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} |
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private ClassLoader loader; |
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66 |
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67 |
public Launcher() { |
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68 |
// Create the extension class loader |
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69 |
ClassLoader extcl; |
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70 |
try { |
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extcl = ExtClassLoader.getExtClassLoader(); |
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} catch (IOException e) { |
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throw new InternalError( |
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74 |
"Could not create extension class loader"); |
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} |
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||
77 |
// Now create the class loader to use to launch the application |
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78 |
try { |
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79 |
loader = AppClassLoader.getAppClassLoader(extcl); |
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80 |
} catch (IOException e) { |
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81 |
throw new InternalError( |
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"Could not create application class loader"); |
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} |
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||
85 |
// Also set the context class loader for the primordial thread. |
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Thread.currentThread().setContextClassLoader(loader); |
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||
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// Finally, install a security manager if requested |
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String s = System.getProperty("java.security.manager"); |
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if (s != null) { |
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SecurityManager sm = null; |
|
92 |
if ("".equals(s) || "default".equals(s)) { |
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sm = new java.lang.SecurityManager(); |
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} else { |
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try { |
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sm = (SecurityManager)loader.loadClass(s).newInstance(); |
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} catch (IllegalAccessException e) { |
|
98 |
} catch (InstantiationException e) { |
|
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} catch (ClassNotFoundException e) { |
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} catch (ClassCastException e) { |
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} |
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} |
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if (sm != null) { |
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System.setSecurityManager(sm); |
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} else { |
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throw new InternalError( |
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"Could not create SecurityManager: " + s); |
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} |
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} |
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} |
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112 |
/* |
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* Returns the class loader used to launch the main application. |
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*/ |
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public ClassLoader getClassLoader() { |
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return loader; |
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} |
|
118 |
||
119 |
/* |
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* The class loader used for loading installed extensions. |
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*/ |
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122 |
static class ExtClassLoader extends URLClassLoader { |
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static { |
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ClassLoader.registerAsParallelCapable(); |
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} |
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/** |
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* create an ExtClassLoader. The ExtClassLoader is created |
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* within a context that limits which files it can read |
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131 |
*/ |
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132 |
public static ExtClassLoader getExtClassLoader() throws IOException |
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{ |
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final File[] dirs = getExtDirs(); |
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try { |
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137 |
// Prior implementations of this doPrivileged() block supplied |
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// aa synthesized ACC via a call to the private method |
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// ExtClassLoader.getContext(). |
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140 |
||
51 | 141 |
return AccessController.doPrivileged( |
142 |
new PrivilegedExceptionAction<ExtClassLoader>() { |
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public ExtClassLoader run() throws IOException { |
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int len = dirs.length; |
145 |
for (int i = 0; i < len; i++) { |
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146 |
MetaIndex.registerDirectory(dirs[i]); |
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} |
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return new ExtClassLoader(dirs); |
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} |
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}); |
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} catch (java.security.PrivilegedActionException e) { |
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throw (IOException) e.getException(); |
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} |
154 |
} |
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156 |
void addExtURL(URL url) { |
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super.addURL(url); |
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} |
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/* |
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* Creates a new ExtClassLoader for the specified directories. |
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*/ |
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public ExtClassLoader(File[] dirs) throws IOException { |
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super(getExtURLs(dirs), null, factory); |
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165 |
} |
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||
167 |
private static File[] getExtDirs() { |
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168 |
String s = System.getProperty("java.ext.dirs"); |
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169 |
File[] dirs; |
|
170 |
if (s != null) { |
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171 |
StringTokenizer st = |
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172 |
new StringTokenizer(s, File.pathSeparator); |
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173 |
int count = st.countTokens(); |
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174 |
dirs = new File[count]; |
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175 |
for (int i = 0; i < count; i++) { |
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176 |
dirs[i] = new File(st.nextToken()); |
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177 |
} |
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178 |
} else { |
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dirs = new File[0]; |
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180 |
} |
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181 |
return dirs; |
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182 |
} |
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183 |
||
184 |
private static URL[] getExtURLs(File[] dirs) throws IOException { |
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51 | 185 |
Vector<URL> urls = new Vector<URL>(); |
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for (int i = 0; i < dirs.length; i++) { |
187 |
String[] files = dirs[i].list(); |
|
188 |
if (files != null) { |
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189 |
for (int j = 0; j < files.length; j++) { |
|
190 |
if (!files[j].equals("meta-index")) { |
|
191 |
File f = new File(dirs[i], files[j]); |
|
192 |
urls.add(getFileURL(f)); |
|
193 |
} |
|
194 |
} |
|
195 |
} |
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196 |
} |
|
197 |
URL[] ua = new URL[urls.size()]; |
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198 |
urls.copyInto(ua); |
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return ua; |
|
200 |
} |
|
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||
202 |
/* |
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203 |
* Searches the installed extension directories for the specified |
|
204 |
* library name. For each extension directory, we first look for |
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205 |
* the native library in the subdirectory whose name is the value |
|
206 |
* of the system property <code>os.arch</code>. Failing that, we |
|
207 |
* look in the extension directory itself. |
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208 |
*/ |
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209 |
public String findLibrary(String name) { |
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210 |
name = System.mapLibraryName(name); |
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URL[] urls = super.getURLs(); |
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File prevDir = null; |
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for (int i = 0; i < urls.length; i++) { |
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// Get the ext directory from the URL |
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File dir = new File(urls[i].getPath()).getParentFile(); |
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if (dir != null && !dir.equals(prevDir)) { |
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// Look in architecture-specific subdirectory first |
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// Read from the saved system properties to avoid deadlock |
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String arch = VM.getSavedProperty("os.arch"); |
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if (arch != null) { |
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File file = new File(new File(dir, arch), name); |
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if (file.exists()) { |
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223 |
return file.getAbsolutePath(); |
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224 |
} |
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225 |
} |
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// Then check the extension directory |
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227 |
File file = new File(dir, name); |
2 | 228 |
if (file.exists()) { |
229 |
return file.getAbsolutePath(); |
|
230 |
} |
|
231 |
} |
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232 |
prevDir = dir; |
2 | 233 |
} |
234 |
return null; |
|
235 |
} |
|
236 |
||
237 |
private static AccessControlContext getContext(File[] dirs) |
|
238 |
throws IOException |
|
239 |
{ |
|
240 |
PathPermissions perms = |
|
241 |
new PathPermissions(dirs); |
|
242 |
||
243 |
ProtectionDomain domain = new ProtectionDomain( |
|
244 |
new CodeSource(perms.getCodeBase(), |
|
245 |
(java.security.cert.Certificate[]) null), |
|
246 |
perms); |
|
247 |
||
248 |
AccessControlContext acc = |
|
249 |
new AccessControlContext(new ProtectionDomain[] { domain }); |
|
250 |
||
251 |
return acc; |
|
252 |
} |
|
253 |
} |
|
254 |
||
255 |
/** |
|
256 |
* The class loader used for loading from java.class.path. |
|
257 |
* runs in a restricted security context. |
|
258 |
*/ |
|
259 |
static class AppClassLoader extends URLClassLoader { |
|
260 |
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261 |
static { |
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262 |
ClassLoader.registerAsParallelCapable(); |
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|
263 |
} |
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|
264 |
|
2 | 265 |
public static ClassLoader getAppClassLoader(final ClassLoader extcl) |
266 |
throws IOException |
|
267 |
{ |
|
268 |
final String s = System.getProperty("java.class.path"); |
|
269 |
final File[] path = (s == null) ? new File[0] : getClassPath(s); |
|
270 |
||
271 |
// Note: on bugid 4256530 |
|
272 |
// Prior implementations of this doPrivileged() block supplied |
|
273 |
// a rather restrictive ACC via a call to the private method |
|
274 |
// AppClassLoader.getContext(). This proved overly restrictive |
|
275 |
// when loading classes. Specifically it prevent |
|
276 |
// accessClassInPackage.sun.* grants from being honored. |
|
277 |
// |
|
51 | 278 |
return AccessController.doPrivileged( |
279 |
new PrivilegedAction<AppClassLoader>() { |
|
280 |
public AppClassLoader run() { |
|
2 | 281 |
URL[] urls = |
282 |
(s == null) ? new URL[0] : pathToURLs(path); |
|
283 |
return new AppClassLoader(urls, extcl); |
|
284 |
} |
|
285 |
}); |
|
286 |
} |
|
287 |
||
288 |
/* |
|
289 |
* Creates a new AppClassLoader |
|
290 |
*/ |
|
291 |
AppClassLoader(URL[] urls, ClassLoader parent) { |
|
292 |
super(urls, parent, factory); |
|
293 |
} |
|
294 |
||
295 |
/** |
|
296 |
* Override loadClass so we can checkPackageAccess. |
|
297 |
*/ |
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298 |
public Class loadClass(String name, boolean resolve) |
2 | 299 |
throws ClassNotFoundException |
300 |
{ |
|
301 |
int i = name.lastIndexOf('.'); |
|
302 |
if (i != -1) { |
|
303 |
SecurityManager sm = System.getSecurityManager(); |
|
304 |
if (sm != null) { |
|
305 |
sm.checkPackageAccess(name.substring(0, i)); |
|
306 |
} |
|
307 |
} |
|
308 |
return (super.loadClass(name, resolve)); |
|
309 |
} |
|
310 |
||
311 |
/** |
|
312 |
* allow any classes loaded from classpath to exit the VM. |
|
313 |
*/ |
|
314 |
protected PermissionCollection getPermissions(CodeSource codesource) |
|
315 |
{ |
|
316 |
PermissionCollection perms = super.getPermissions(codesource); |
|
317 |
perms.add(new RuntimePermission("exitVM")); |
|
318 |
return perms; |
|
319 |
} |
|
320 |
||
321 |
/** |
|
322 |
* This class loader supports dynamic additions to the class path |
|
323 |
* at runtime. |
|
324 |
* |
|
325 |
* @see java.lang.instrument.Instrumentation#appendToSystemClassPathSearch |
|
326 |
*/ |
|
327 |
private void appendToClassPathForInstrumentation(String path) { |
|
328 |
assert(Thread.holdsLock(this)); |
|
329 |
||
330 |
// addURL is a no-op if path already contains the URL |
|
331 |
super.addURL( getFileURL(new File(path)) ); |
|
332 |
} |
|
333 |
||
334 |
/** |
|
335 |
* create a context that can read any directories (recursively) |
|
336 |
* mentioned in the class path. In the case of a jar, it has to |
|
337 |
* be the directory containing the jar, not just the jar, as jar |
|
338 |
* files might refer to other jar files. |
|
339 |
*/ |
|
340 |
||
341 |
private static AccessControlContext getContext(File[] cp) |
|
342 |
throws java.net.MalformedURLException |
|
343 |
{ |
|
344 |
PathPermissions perms = |
|
345 |
new PathPermissions(cp); |
|
346 |
||
347 |
ProtectionDomain domain = |
|
348 |
new ProtectionDomain(new CodeSource(perms.getCodeBase(), |
|
349 |
(java.security.cert.Certificate[]) null), |
|
350 |
perms); |
|
351 |
||
352 |
AccessControlContext acc = |
|
353 |
new AccessControlContext(new ProtectionDomain[] { domain }); |
|
354 |
||
355 |
return acc; |
|
356 |
} |
|
357 |
} |
|
358 |
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359 |
private static class BootClassPathHolder { |
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360 |
static final URLClassPath bcp; |
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361 |
static { |
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362 |
URL[] urls; |
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|
363 |
if (bootClassPath != null) { |
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|
364 |
urls = AccessController.doPrivileged( |
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365 |
new PrivilegedAction<URL[]>() { |
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|
366 |
public URL[] run() { |
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File[] classPath = getClassPath(bootClassPath); |
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368 |
int len = classPath.length; |
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369 |
Set<File> seenDirs = new HashSet<File>(); |
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370 |
for (int i = 0; i < len; i++) { |
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371 |
File curEntry = classPath[i]; |
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372 |
// Negative test used to properly handle |
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373 |
// nonexistent jars on boot class path |
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374 |
if (!curEntry.isDirectory()) { |
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375 |
curEntry = curEntry.getParentFile(); |
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376 |
} |
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377 |
if (curEntry != null && seenDirs.add(curEntry)) { |
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|
378 |
MetaIndex.registerDirectory(curEntry); |
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379 |
} |
2 | 380 |
} |
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381 |
return pathToURLs(classPath); |
2 | 382 |
} |
383 |
} |
|
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|
384 |
); |
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|
385 |
} else { |
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386 |
urls = new URL[0]; |
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387 |
} |
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388 |
bcp = new URLClassPath(urls, factory); |
2 | 389 |
} |
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390 |
} |
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|
391 |
|
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392 |
public static URLClassPath getBootstrapClassPath() { |
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|
393 |
return BootClassPathHolder.bcp; |
2 | 394 |
} |
395 |
||
396 |
private static URL[] pathToURLs(File[] path) { |
|
397 |
URL[] urls = new URL[path.length]; |
|
398 |
for (int i = 0; i < path.length; i++) { |
|
399 |
urls[i] = getFileURL(path[i]); |
|
400 |
} |
|
401 |
// DEBUG |
|
402 |
//for (int i = 0; i < urls.length; i++) { |
|
403 |
// System.out.println("urls[" + i + "] = " + '"' + urls[i] + '"'); |
|
404 |
//} |
|
405 |
return urls; |
|
406 |
} |
|
407 |
||
408 |
private static File[] getClassPath(String cp) { |
|
409 |
File[] path; |
|
410 |
if (cp != null) { |
|
411 |
int count = 0, maxCount = 1; |
|
412 |
int pos = 0, lastPos = 0; |
|
413 |
// Count the number of separators first |
|
414 |
while ((pos = cp.indexOf(File.pathSeparator, lastPos)) != -1) { |
|
415 |
maxCount++; |
|
416 |
lastPos = pos + 1; |
|
417 |
} |
|
418 |
path = new File[maxCount]; |
|
419 |
lastPos = pos = 0; |
|
420 |
// Now scan for each path component |
|
421 |
while ((pos = cp.indexOf(File.pathSeparator, lastPos)) != -1) { |
|
422 |
if (pos - lastPos > 0) { |
|
423 |
path[count++] = new File(cp.substring(lastPos, pos)); |
|
424 |
} else { |
|
425 |
// empty path component translates to "." |
|
426 |
path[count++] = new File("."); |
|
427 |
} |
|
428 |
lastPos = pos + 1; |
|
429 |
} |
|
430 |
// Make sure we include the last path component |
|
431 |
if (lastPos < cp.length()) { |
|
432 |
path[count++] = new File(cp.substring(lastPos)); |
|
433 |
} else { |
|
434 |
path[count++] = new File("."); |
|
435 |
} |
|
436 |
// Trim array to correct size |
|
437 |
if (count != maxCount) { |
|
438 |
File[] tmp = new File[count]; |
|
439 |
System.arraycopy(path, 0, tmp, 0, count); |
|
440 |
path = tmp; |
|
441 |
} |
|
442 |
} else { |
|
443 |
path = new File[0]; |
|
444 |
} |
|
445 |
// DEBUG |
|
446 |
//for (int i = 0; i < path.length; i++) { |
|
447 |
// System.out.println("path[" + i + "] = " + '"' + path[i] + '"'); |
|
448 |
//} |
|
449 |
return path; |
|
450 |
} |
|
451 |
||
452 |
private static URLStreamHandler fileHandler; |
|
453 |
||
454 |
static URL getFileURL(File file) { |
|
455 |
try { |
|
456 |
file = file.getCanonicalFile(); |
|
457 |
} catch (IOException e) {} |
|
458 |
||
459 |
try { |
|
460 |
return ParseUtil.fileToEncodedURL(file); |
|
461 |
} catch (MalformedURLException e) { |
|
462 |
// Should never happen since we specify the protocol... |
|
463 |
throw new InternalError(); |
|
464 |
} |
|
465 |
} |
|
466 |
||
467 |
/* |
|
468 |
* The stream handler factory for loading system protocol handlers. |
|
469 |
*/ |
|
470 |
private static class Factory implements URLStreamHandlerFactory { |
|
471 |
private static String PREFIX = "sun.net.www.protocol"; |
|
472 |
||
473 |
public URLStreamHandler createURLStreamHandler(String protocol) { |
|
474 |
String name = PREFIX + "." + protocol + ".Handler"; |
|
475 |
try { |
|
476 |
Class c = Class.forName(name); |
|
477 |
return (URLStreamHandler)c.newInstance(); |
|
478 |
} catch (ClassNotFoundException e) { |
|
479 |
e.printStackTrace(); |
|
480 |
} catch (InstantiationException e) { |
|
481 |
e.printStackTrace(); |
|
482 |
} catch (IllegalAccessException e) { |
|
483 |
e.printStackTrace(); |
|
484 |
} |
|
485 |
throw new InternalError("could not load " + protocol + |
|
486 |
"system protocol handler"); |
|
487 |
} |
|
488 |
} |
|
489 |
} |
|
490 |
||
491 |
class PathPermissions extends PermissionCollection { |
|
492 |
// use serialVersionUID from JDK 1.2.2 for interoperability |
|
493 |
private static final long serialVersionUID = 8133287259134945693L; |
|
494 |
||
495 |
private File path[]; |
|
496 |
private Permissions perms; |
|
497 |
||
498 |
URL codeBase; |
|
499 |
||
500 |
PathPermissions(File path[]) |
|
501 |
{ |
|
502 |
this.path = path; |
|
503 |
this.perms = null; |
|
504 |
this.codeBase = null; |
|
505 |
} |
|
506 |
||
507 |
URL getCodeBase() |
|
508 |
{ |
|
509 |
return codeBase; |
|
510 |
} |
|
511 |
||
512 |
public void add(java.security.Permission permission) { |
|
513 |
throw new SecurityException("attempt to add a permission"); |
|
514 |
} |
|
515 |
||
516 |
private synchronized void init() |
|
517 |
{ |
|
518 |
if (perms != null) |
|
519 |
return; |
|
520 |
||
521 |
perms = new Permissions(); |
|
522 |
||
523 |
// this is needed to be able to create the classloader itself! |
|
524 |
perms.add(SecurityConstants.CREATE_CLASSLOADER_PERMISSION); |
|
525 |
||
526 |
// add permission to read any "java.*" property |
|
527 |
perms.add(new java.util.PropertyPermission("java.*", |
|
528 |
SecurityConstants.PROPERTY_READ_ACTION)); |
|
529 |
||
51 | 530 |
AccessController.doPrivileged(new PrivilegedAction<Void>() { |
531 |
public Void run() { |
|
2 | 532 |
for (int i=0; i < path.length; i++) { |
533 |
File f = path[i]; |
|
534 |
String path; |
|
535 |
try { |
|
536 |
path = f.getCanonicalPath(); |
|
537 |
} catch (IOException ioe) { |
|
538 |
path = f.getAbsolutePath(); |
|
539 |
} |
|
540 |
if (i == 0) { |
|
541 |
codeBase = Launcher.getFileURL(new File(path)); |
|
542 |
} |
|
543 |
if (f.isDirectory()) { |
|
544 |
if (path.endsWith(File.separator)) { |
|
545 |
perms.add(new FilePermission(path+"-", |
|
546 |
SecurityConstants.FILE_READ_ACTION)); |
|
547 |
} else { |
|
548 |
perms.add(new FilePermission( |
|
549 |
path + File.separator+"-", |
|
550 |
SecurityConstants.FILE_READ_ACTION)); |
|
551 |
} |
|
552 |
} else { |
|
553 |
int endIndex = path.lastIndexOf(File.separatorChar); |
|
554 |
if (endIndex != -1) { |
|
555 |
path = path.substring(0, endIndex+1) + "-"; |
|
556 |
perms.add(new FilePermission(path, |
|
557 |
SecurityConstants.FILE_READ_ACTION)); |
|
558 |
} else { |
|
559 |
// XXX? |
|
560 |
} |
|
561 |
} |
|
562 |
} |
|
563 |
return null; |
|
564 |
} |
|
565 |
}); |
|
566 |
} |
|
567 |
||
568 |
public boolean implies(java.security.Permission permission) { |
|
569 |
if (perms == null) |
|
570 |
init(); |
|
571 |
return perms.implies(permission); |
|
572 |
} |
|
573 |
||
51 | 574 |
public java.util.Enumeration<Permission> elements() { |
2 | 575 |
if (perms == null) |
576 |
init(); |
|
577 |
synchronized (perms) { |
|
578 |
return perms.elements(); |
|
579 |
} |
|
580 |
} |
|
581 |
||
582 |
public String toString() { |
|
583 |
if (perms == null) |
|
584 |
init(); |
|
585 |
return perms.toString(); |
|
586 |
} |
|
587 |
} |