Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.services/src/jdk/vm/ci/services/JVMCIClassLoaderFactory.java @ 23712:66059526b021 jvmci-0.16
8160177: [JVMCI] race condition in HotSpotMemoryAccessProviderImpl.verifyReadRawObject
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Thu, 23 Jun 2016 16:49:32 +0200 |
parents | 9e1235406b59 |
children | 450e0bafd83d |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.vm.ci.services; import java.io.File; import java.net.MalformedURLException; import java.net.URL; import java.net.URLClassLoader; import java.util.ArrayList; import java.util.List; import sun.misc.VM; /** * Utility called from the VM to create and register a separate class loader for loading JVMCI * classes (i.e., those in found in lib/jvmci/*.jar) as well as those available on the class path in * the {@code "jvmci.class.path.append"} system property. */ class JVMCIClassLoaderFactory { /** * Copy of the {@code UseJVMCIClassLoader} VM option. Set by the VM before the static * initializer is called. */ private static boolean useJVMCIClassLoader; /** * Registers the JVMCI class loader in the VM. */ private static native void init(ClassLoader loader); static { init(useJVMCIClassLoader ? newClassLoader() : null); } /** * Creates a new class loader for loading JVMCI classes. */ private static ClassLoader newClassLoader() { URL[] urls = getJVMCIJarsUrls(); ClassLoader parent = null; return URLClassLoader.newInstance(urls, parent); } /** * Gets the URLs for lib/jvmci/*.jar. */ private static URL[] getJVMCIJarsUrls() { File javaHome = new File(System.getProperty("java.home")); File lib = new File(javaHome, "lib"); File jvmci = new File(lib, "jvmci"); if (!jvmci.isDirectory()) { throw new InternalError(jvmci + " does not exist or is not a directory"); } List<URL> urls = new ArrayList<>(); for (String fileName : jvmci.list()) { if (fileName.endsWith(".jar")) { File file = new File(jvmci, fileName); if (file.isDirectory()) { continue; } try { urls.add(file.toURI().toURL()); } catch (MalformedURLException e) { throw new InternalError(e); } } } String append = VM.getSavedProperty("jvmci.class.path.append"); if (append != null) { for (String entry : append.split(File.pathSeparator)) { File file = new File(entry); try { urls.add(file.toURI().toURL()); } catch (MalformedURLException e) { throw new InternalError(e); } } } return urls.toArray(new URL[urls.size()]); } }