Mercurial > hg > graal-jvmci-8
diff jvmci/jdk.vm.ci.services/src/jdk/vm/ci/services/JVMCIClassLoaderFactory.java @ 22761:f2206f5bb62e
removed @ServiceProvider mechanism (GRAAL-1380)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 30 Dec 2015 17:55:07 +0100 |
parents | jvmci/jdk.vm.ci.service/src/jdk/vm/ci/service/JVMCIClassLoaderFactory.java@1bbd4a7c274b |
children | f84a5ac3be22 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jvmci/jdk.vm.ci.services/src/jdk/vm/ci/services/JVMCIClassLoaderFactory.java Wed Dec 30 17:55:07 2015 +0100 @@ -0,0 +1,90 @@ +/* + * 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; + +/** + * 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()]); + } +}