Mercurial > hg > truffle
diff graal/com.oracle.jvmci.service/src/com/oracle/jvmci/service/JVMCIClassLoaderFactory.java @ 21607:71b338926f2e
moved JVMCI classes into their own distributions (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 29 May 2015 22:27:38 +0200 |
parents | graal/com.oracle.jvmci.hotspot.loader/src/com/oracle/jvmci/hotspot/loader/Factory.java@47bebae7454f |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.service/src/com/oracle/jvmci/service/JVMCIClassLoaderFactory.java Fri May 29 22:27:38 2015 +0200 @@ -0,0 +1,87 @@ +/* + * 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 com.oracle.jvmci.service; + +import java.io.*; +import java.net.*; +import java.util.*; + +/** + * 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). + */ +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.exists()) { + throw new InternalError(jvmci + " does not exist"); + } + + 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); + } + } + } + + return urls.toArray(new URL[urls.size()]); + } +}