Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.services/src/jdk/vm/ci/services/JVMCIClassLoaderFactory.java @ 23776:450e0bafd83d

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use VM.getSavedProperty instead of System.getProperty for "java.home"
author Doug Simon <doug.simon@oracle.com>
date Tue, 04 Oct 2016 22:02:07 +0200
parents 9e1235406b59
children d4858e92c9b1
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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(VM.getSavedProperty("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 }