/* * Copyright (c) 2017, 2020, 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 randomness * * @summary converted from VM Testbase nsk/monitoring/stress/classload/unload005. * VM Testbase keywords: [stress, monitoring, nonconcurrent, noJFR] * VM Testbase readme: * DESCRIPTION * The test checks up getAllClasses(), getLoadedClassCount(), * getTotalLoadedClassCount(), getUnloadedClassCount() methods when one * class is unloaded by 100 loaders, which are the instances of the same * ClassLoader class. * Access to the management metrics is accomplished through the MBeanServer. * The unload005 test is performed for the ClassLoadingMBean interface under * DEFAULT implementation of MBean server. * COMMENTS * Fixed the bug * 4976274 Regression: "OutOfMemoryError: Java heap space" when -XX:+UseParallelGC * * @library /vmTestbase * /test/lib * @comment generate and compile LoadableClassXXX classes * @run driver nsk.monitoring.stress.classload.GenClassesBuilder * @run main/othervm * -XX:-UseGCOverheadLimit * nsk.monitoring.stress.classload.unload001 * classes * -testMode=server * -singleClassloaderClass * -loadableClassCount=1 * -loadersCount=100 */