Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.services/src/jdk/vm/ci/services/JVMCIClassLoaderFactory.java @ 23700:9e1235406b59
[Findbugs] various warnings reported for JVMCI sources (JDK-8159613)
author | Doug Simon <doug.simon@oracle.com> |
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date | Sat, 18 Jun 2016 13:19:01 +0200 |
parents | f84a5ac3be22 |
children | 450e0bafd83d |
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1 /* |
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2 * Copyright (c) 2014, 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 jdk.vm.ci.services; |
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24 |
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25 import java.io.File; |
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26 import java.net.MalformedURLException; |
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27 import java.net.URL; |
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28 import java.net.URLClassLoader; |
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29 import java.util.ArrayList; |
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30 import java.util.List; |
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31 |
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32 import sun.misc.VM; |
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33 |
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34 /** |
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35 * Utility called from the VM to create and register a separate class loader for loading JVMCI |
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36 * classes (i.e., those in found in lib/jvmci/*.jar) as well as those available on the class path in |
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37 * the {@code "jvmci.class.path.append"} system property. |
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38 */ |
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39 class JVMCIClassLoaderFactory { |
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40 |
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41 /** |
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42 * Copy of the {@code UseJVMCIClassLoader} VM option. Set by the VM before the static |
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43 * initializer is called. |
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44 */ |
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45 private static boolean useJVMCIClassLoader; |
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46 |
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47 /** |
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48 * Registers the JVMCI class loader in the VM. |
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49 */ |
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50 private static native void init(ClassLoader loader); |
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51 |
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52 static { |
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53 init(useJVMCIClassLoader ? newClassLoader() : null); |
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54 } |
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55 |
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56 /** |
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57 * Creates a new class loader for loading JVMCI classes. |
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58 */ |
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59 private static ClassLoader newClassLoader() { |
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60 URL[] urls = getJVMCIJarsUrls(); |
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61 ClassLoader parent = null; |
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62 return URLClassLoader.newInstance(urls, parent); |
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63 } |
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64 |
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65 /** |
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66 * Gets the URLs for lib/jvmci/*.jar. |
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67 */ |
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68 private static URL[] getJVMCIJarsUrls() { |
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69 File javaHome = new File(System.getProperty("java.home")); |
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70 File lib = new File(javaHome, "lib"); |
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71 File jvmci = new File(lib, "jvmci"); |
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72 if (!jvmci.isDirectory()) { |
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73 throw new InternalError(jvmci + " does not exist or is not a directory"); |
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74 } |
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75 |
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76 List<URL> urls = new ArrayList<>(); |
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77 for (String fileName : jvmci.list()) { |
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78 if (fileName.endsWith(".jar")) { |
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79 File file = new File(jvmci, fileName); |
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80 if (file.isDirectory()) { |
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81 continue; |
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82 } |
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83 try { |
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84 urls.add(file.toURI().toURL()); |
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85 } catch (MalformedURLException e) { |
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86 throw new InternalError(e); |
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87 } |
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88 } |
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89 } |
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90 |
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91 String append = VM.getSavedProperty("jvmci.class.path.append"); |
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92 if (append != null) { |
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93 for (String entry : append.split(File.pathSeparator)) { |
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94 File file = new File(entry); |
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95 try { |
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96 urls.add(file.toURI().toURL()); |
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97 } catch (MalformedURLException e) { |
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98 throw new InternalError(e); |
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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 return urls.toArray(new URL[urls.size()]); |
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104 } |
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105 } |