| /* |
| * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2018, SAP SE. 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. |
| */ |
| |
| /* |
| * @test |
| * @summary Test of diagnostic command VM.classloaders |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.compiler |
| * java.management |
| * jdk.internal.jvmstat/sun.jvmstat.monitor |
| * @run testng ClassLoaderHierarchyTest |
| */ |
| |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.dcmd.CommandExecutor; |
| import jdk.test.lib.dcmd.JMXExecutor; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.FileChannel; |
| |
| public class ClassLoaderHierarchyTest { |
| |
| //+-- <bootstrap> |
| // | |
| // +-- "platform", jdk.internal.loader.ClassLoaders$PlatformClassLoader |
| // | | |
| // | +-- "app", jdk.internal.loader.ClassLoaders$AppClassLoader |
| // | |
| // +-- jdk.internal.reflect.DelegatingClassLoader |
| // | |
| // +-- "Kevin", ClassLoaderHierarchyTest$TestClassLoader |
| // | |
| // +-- ClassLoaderHierarchyTest$TestClassLoader |
| // | |
| // +-- "Bill", ClassLoaderHierarchyTest$TestClassLoader |
| |
| public void run(CommandExecutor executor) throws ClassNotFoundException { |
| |
| ClassLoader unnamed_cl = new TestClassLoader(null, null); |
| Class<?> c1 = Class.forName("TestClass2", true, unnamed_cl); |
| if (c1.getClassLoader() != unnamed_cl) { |
| Assert.fail("TestClass defined by wrong classloader: " + c1.getClassLoader()); |
| } |
| |
| ClassLoader named_cl = new TestClassLoader("Kevin", null); |
| Class<?> c2 = Class.forName("TestClass2", true, named_cl); |
| if (c2.getClassLoader() != named_cl) { |
| Assert.fail("TestClass defined by wrong classloader: " + c2.getClassLoader()); |
| } |
| |
| ClassLoader named_child_cl = new TestClassLoader("Bill", unnamed_cl); |
| Class<?> c3 = Class.forName("TestClass2", true, named_child_cl); |
| if (c3.getClassLoader() != named_child_cl) { |
| Assert.fail("TestClass defined by wrong classloader: " + c3.getClassLoader()); |
| } |
| |
| // First test: simple output, no classes displayed |
| OutputAnalyzer output = executor.execute("VM.classloaders"); |
| output.shouldContain("<bootstrap>"); |
| output.shouldMatch(".*TestClassLoader"); |
| output.shouldMatch("Kevin.*TestClassLoader"); |
| output.shouldMatch("Bill.*TestClassLoader"); |
| |
| // Second test: print with classes. |
| output = executor.execute("VM.classloaders show-classes"); |
| output.shouldContain("<bootstrap>"); |
| output.shouldContain("java.lang.Object"); |
| output.shouldMatch(".*TestClassLoader"); |
| output.shouldMatch("Kevin.*TestClassLoader"); |
| output.shouldMatch("Bill.*TestClassLoader"); |
| output.shouldContain("TestClass2"); |
| } |
| |
| static class TestClassLoader extends ClassLoader { |
| |
| public TestClassLoader() { |
| super(); |
| } |
| |
| public TestClassLoader(String name, ClassLoader parent) { |
| super(name, parent); |
| } |
| |
| public static final String CLASS_NAME = "TestClass2"; |
| |
| static ByteBuffer readClassFile(String name) |
| { |
| File f = new File(System.getProperty("test.classes", "."), |
| name); |
| try (FileInputStream fin = new FileInputStream(f); |
| FileChannel fc = fin.getChannel()) |
| { |
| return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()); |
| } catch (IOException e) { |
| Assert.fail("Can't open file: " + name, e); |
| } |
| |
| /* Will not reach here as Assert.fail() throws exception */ |
| return null; |
| } |
| |
| protected Class<?> loadClass(String name, boolean resolve) |
| throws ClassNotFoundException |
| { |
| Class<?> c; |
| if (!CLASS_NAME.equals(name)) { |
| c = super.loadClass(name, resolve); |
| } else { |
| // should not delegate to the system class loader |
| c = findClass(name); |
| if (resolve) { |
| resolveClass(c); |
| } |
| } |
| return c; |
| } |
| |
| protected Class<?> findClass(String name) |
| throws ClassNotFoundException |
| { |
| if (!CLASS_NAME.equals(name)) { |
| throw new ClassNotFoundException("Unexpected class: " + name); |
| } |
| return defineClass(name, readClassFile(name + ".class"), null); |
| } |
| |
| } |
| |
| @Test |
| public void jmx() throws ClassNotFoundException { |
| run(new JMXExecutor()); |
| } |
| |
| } |
| |
| class TestClass2 { |
| static { |
| Runnable r = () -> System.out.println("Hello"); |
| r.run(); |
| } |
| } |
| |