| /* |
| * Copyright (c) 2004, 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 |
| * @key stress gc |
| * |
| * @summary converted from VM Testbase gc/gctests/LargeObjects/large001. |
| * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, quick] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * The test checks that Garbage Collector correctly does not throw any |
| * unexpected exceptions/errors while allocating large objects (classes |
| * that have more than 65535 fields and classes that have less than 65535 |
| * fields). 65535 of fields is a limitation for JVM (see JVM specification |
| * Second edition 4.10). |
| * Since it is impossible to create one class with about 65535 of fields |
| * (javac cannot compile it), a child class extends a parent class, so the |
| * fields are devided into two subsets. However, the child class still has |
| * about 65535 of fields. |
| * The test starts a number of threads. This number is either set in *.cfg |
| * file or is calculated by the test itself based on the machine (see |
| * nsk.share.gc.Algorithms.getThreadsCount() method). As soon as all threads |
| * are started, each thread begins its checking. |
| * There are 13 classes to be loaded by each thread. These classes are |
| * generated by nsk.share.gc.Generator (see its javadoc for more details). |
| * Each class has a huge number of fields, but this number is less than the JVM |
| * limitation. |
| * The test loads the classes with nsk.share.gc.GCClassUnloader class that |
| * extends nsk.share.ClassUnloader and has a bit different algorith of eating |
| * heap. As soon as a class is loaded, the test creates an instance of |
| * it - allocates an object of that type. Then it drops references to the |
| * class and to the instance and tries to unload the class. The test does not |
| * expect any exceptions to be thrown. |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * |
| * @comment generate and compile nsk.share.gc.newclass.* classes |
| * @run driver nsk.share.gc.GenClassesBuilder |
| * |
| * @run main/othervm |
| * -XX:-UseGCOverheadLimit |
| * -Xlog:gc* |
| * gc.gctests.LargeObjects.large001.large001 |
| * -largeClassesPath classes |
| * -isOverLimitFields false |
| * -aggregationDepth 0 |
| * -t 1 |
| */ |
| |
| package gc.gctests.LargeObjects.large001; |
| |
| import java.lang.reflect.*; |
| import java.lang.ref.WeakReference; |
| import java.util.*; |
| import nsk.share.TestFailure; |
| |
| |
| import nsk.share.gc.*; |
| import nsk.share.*; |
| |
| public class large001 extends ThreadedGCTest { |
| |
| // Package of the classes to be loaded |
| final static String PREFIX = "nsk.share.gc.newclass."; |
| // A bunch of classes that have number of fields more than JVM limitation |
| final static String[] LCLASSES = {PREFIX + "private_int_lchild", |
| PREFIX + "protected_short_lchild", |
| PREFIX + "public_long_lchild", |
| PREFIX + "public_Object_lchild", |
| PREFIX + "static_byte_lchild", |
| PREFIX + "static_float_lchild", |
| PREFIX + "transient_boolean_lchild", |
| PREFIX + "volatile_double_lchild", |
| PREFIX + "protected_combination_lchild", |
| PREFIX + "public_combination_lchild", |
| PREFIX + "static_combination_lchild", |
| PREFIX + "transient_combination_lchild", |
| PREFIX + "volatile_combination_lchild" |
| }; |
| // A bunch of classes that have number of fields less than JVM limitation |
| final static String[] SCLASSES = {PREFIX + "private_int_schild", |
| PREFIX + "protected_short_schild", |
| PREFIX + "public_long_schild", |
| PREFIX + "public_Object_schild", |
| PREFIX + "static_byte_schild", |
| PREFIX + "static_float_schild", |
| PREFIX + "transient_boolean_schild", |
| PREFIX + "volatile_double_schild", |
| PREFIX + "protected_combination_schild", |
| PREFIX + "public_combination_schild", |
| PREFIX + "static_combination_schild", |
| PREFIX + "transient_combination_schild", |
| PREFIX + "volatile_combination_schild" |
| }; |
| boolean isOverLimitFields = true; |
| int aggregationDepth = 0; |
| String largeClassesPath; |
| |
| private class Worker implements Runnable { |
| |
| int id; |
| |
| public Worker(int id) { |
| this.id = id; |
| } |
| |
| public void run() { |
| try { |
| // Use special ClassUnloader to load/unload classes |
| ClassUnloader unloader = new ClassUnloader(); |
| String[] classes = isOverLimitFields ? LCLASSES : SCLASSES; |
| |
| for (String name : classes) { |
| // Load the class |
| log.debug(id + ": Loading class: " + name); |
| unloader.loadClass(name, largeClassesPath); |
| log.debug(id + ": Class loaded: " + name); |
| |
| Class loadedClass = unloader.getLoadedClass(); |
| Object loadedClassInstance = loadedClass.newInstance(); |
| |
| log.debug(id + ": Instance of the class: " + loadedClassInstance); |
| int depth = aggregationDepth; |
| List<WeakReference> refs = new ArrayList<WeakReference>(depth); |
| addObjRef(loadedClassInstance, loadedClass, depth, refs); |
| |
| // Drop all references to the class and try to unload it |
| Algorithms.eatMemory(getExecutionController()); |
| log.debug(id + ": Testing non-null after GC force for: " + name); |
| if (loadedClass == null || loadedClassInstance == null) { |
| throw new Exception("Null class"); |
| } |
| verifyObjRef(loadedClassInstance, depth); |
| for (WeakReference ref : refs) { |
| if (ref.get() == null) { |
| throw new Exception("Unexpected null reference"); |
| } |
| } |
| refs = null; |
| loadedClass = null; |
| loadedClassInstance = null; |
| |
| log.debug(id + ": Unloading class: " |
| + name); |
| boolean result = unloader.unloadClass(getExecutionController()); |
| log.debug(id + ": Result of uloading " |
| + "class " + name + ": " + result); |
| } |
| } catch (OutOfMemoryError oome) { |
| // just skip if we eat memory in several threads... |
| // rethrow in the case of one thread |
| if (runParams.getNumberOfThreads() == 1) { |
| throw oome; |
| } |
| } catch (Throwable t) { |
| throw new TestFailure("Unexpected exception: ", t); |
| } |
| } |
| |
| // This method recursively create chain of aggregated objects for given object |
| public void addObjRef(Object object, Class clazz, int count, List<WeakReference> list) throws Throwable { |
| if (count == 0) { |
| return; |
| } |
| |
| Field[] fields = object.getClass().getFields(); |
| for (Field field : fields) { |
| if (field.getName().startsWith("obj")) { |
| Object addedObject = clazz.newInstance(); |
| field.set(object, addedObject); |
| System.out.println("Added field " + field.getName() + " .... " + count); |
| addObjRef(addedObject, clazz, count - 1, list); |
| list.add(new WeakReference<Object>(addedObject)); |
| } |
| } |
| } |
| |
| // This method recursively verfiy chain of aggregated objects for given object. |
| // Throws null pointer exception of objP/C field is null |
| public void verifyObjRef(Object object, int count) throws Throwable { |
| if (count == 0) { |
| return; |
| } |
| |
| Field[] fields = object.getClass().getFields(); |
| for (Field field : fields) { |
| if (field.getName().startsWith("obj")) { |
| Object obj = field.get(object); |
| verifyObjRef(obj, count - 1); |
| } |
| } |
| } |
| } |
| |
| public large001(String[] args) { |
| for (int i = 0; i < args.length; i++) { |
| if (args[i].equals("-largeClassesPath")) { |
| largeClassesPath = args[++i]; |
| } else if (args[i].equals("-isOverLimitFields")) { |
| isOverLimitFields = Boolean.getBoolean(args[++i]); |
| } else if (args[i].equals("-aggregationDepth")) { |
| aggregationDepth = Integer.parseInt(args[++i]); |
| } |
| } |
| if (largeClassesPath == null || largeClassesPath.length() == 0) { |
| throw new TestFailure("No classpath for large classes is given"); |
| } |
| } |
| |
| @Override |
| protected Runnable createRunnable(int i) { |
| return new Worker(i); |
| } |
| |
| @Override |
| public void run() { |
| if (isOverLimitFields) { |
| log.debug("Loading classes that have number " |
| + "of fields over limitation (more " |
| + "than 65535)"); |
| } else { |
| log.debug("Loading classes that have number " |
| + "of fields under limitation (less " |
| + "than 65535)"); |
| } |
| super.run(); |
| } |
| |
| public static void main(String args[]) { |
| GC.runTest(new large001(args), args); |
| } |
| } |