| /* |
| * Copyright (c) 2013, 2018, 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. |
| */ |
| |
| /* |
| * @test |
| * |
| * @summary converted from VM Testbase metaspace/stressDictionary. |
| * VM Testbase keywords: [nonconcurrent, javac] |
| * |
| * @library /vmTestbase /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-CMSPrecleaningEnabled metaspace.stressDictionary.StressDictionary -stressTime 30 |
| */ |
| |
| package metaspace.stressDictionary; |
| |
| import java.util.*; |
| import java.lang.management.ManagementFactory; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.concurrent.*; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import nsk.share.gc.GCTestBase; |
| import nsk.share.test.*; |
| import vm.share.InMemoryJavaCompiler; |
| |
| /** |
| * There is a data structure named "dictionary" in class BlockFreelist. It stores |
| * information about free memory blocks for further reusing. Allocation of new block goes |
| * from dictionary only if dictionary is fat enough. (At the moment of test creation this limit is 64K.) |
| * So to stress dictionary we should fill it permanently. The easiest way to fill the dictionary |
| * is to fail class loading. This failed action will return allocated blocks to dictionary. |
| * |
| * There are two type of threads in this test: threads, failing classloading and threads, |
| * loading regular classes and checking they work properly. |
| */ |
| public class StressDictionary extends GCTestBase { |
| |
| private static byte[] bytecode; |
| |
| private class FillingDictionaryWorker implements Callable<Object> { |
| @Override |
| public Object call() throws Exception { |
| while (stresser.continueExecution()) { |
| try { |
| byte[] badBytecode = bytecode.clone(); |
| badBytecode[random.nextInt(badBytecode.length)] = (byte) 42; |
| classloader.define(badBytecode); |
| } catch (Throwable e) { |
| // We can get ClassFormatError, ClassNotFoundException or anything else here |
| } |
| } |
| return null; |
| } |
| } |
| |
| private class RegularWorker implements Callable<Object> { |
| @Override |
| public Object call() throws Exception { |
| while (stresser.continueExecution()) { |
| Class<?> c = classloader.define(bytecode); |
| testClass(c); |
| } |
| return null; |
| } |
| } |
| |
| private static String[] args; |
| |
| private static final String methodName = "myMethod"; |
| |
| private static final int NUMBER_OF_CORRUPTING_THREADS = 10; |
| |
| private static final int NUMBER_OF_METHOD_CALLS = 50; |
| |
| private static final int NUMBER_OF_NOT_CORRUPTING_THREADS = 10; |
| |
| private AtomicLong classesCounter = new AtomicLong(0); |
| |
| private volatile ClassloaderUnderTest classloader = new ClassloaderUnderTest(); |
| |
| private Random random; |
| |
| private ExecutionController stresser; |
| |
| public static void main(String[] args) { |
| StressDictionary.args = args; |
| Tests.runTest(new StressDictionary(), args); |
| } |
| |
| public void run() { |
| random = new Random(runParams.getSeed()); |
| stresser = new Stresser(args); |
| stresser.start(1); |
| // Generate some bytecodes. |
| bytecode = generateAndCompile(); |
| List<Callable<Object>> tasks = new LinkedList<Callable<Object>>(); |
| for (int i = 0; i < NUMBER_OF_CORRUPTING_THREADS; i++) { |
| tasks.add(this.new FillingDictionaryWorker()); |
| } |
| for (int i = 0; i < NUMBER_OF_NOT_CORRUPTING_THREADS; i++) { |
| tasks.add(this.new RegularWorker()); |
| } |
| ExecutorService executorService = Executors.newCachedThreadPool(); |
| try { |
| executorService.invokeAll(tasks); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| private byte[] generateAndCompile() { |
| Map<String, CharSequence> sources = new HashMap<String, CharSequence>(); |
| String className = "MyClass" + classesCounter.incrementAndGet(); |
| sources.put(className, generateSource(className)); |
| return InMemoryJavaCompiler.compile(sources).values().iterator().next(); |
| } |
| |
| private CharSequence generateSource(String className) { |
| return "public class " + className + " { " + |
| "public static String s1 = \"s1" + random.nextInt() + "\"; " + |
| "public String s2 = \"s2" + random.nextInt() + "\"; " + |
| "public String " + methodName + "() {return s1 + s2; } " + |
| "}"; |
| } |
| |
| private void testClass(Class<?> clazz) { |
| try { |
| for (Method m : clazz.getMethods()) { |
| if (m.getName().equals(methodName)) { |
| for (int j = 0; j < NUMBER_OF_METHOD_CALLS; j++) { |
| m.invoke(clazz.newInstance()); |
| } |
| } |
| } |
| } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) { |
| log.error("Class check failed: " + e.getMessage()); |
| e.printStackTrace(); |
| setFailed(true); |
| } |
| |
| } |
| |
| } |