| /* |
| * Copyright (c) 2017, 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 |
| * |
| * @summary converted from VM Testbase nsk/monitoring/stress/lowmem/lowmem012. |
| * VM Testbase keywords: [stress, monitoring, nonconcurrent] |
| * VM Testbase readme: |
| * DESCRIPTION |
| * The test checks that enabling of low memory detection does not lead to |
| * unexpected behaviour: crashes of the VM and undocumented exceptions. |
| * The test enables low memory detection: it adds NotificationListener |
| * to the MemoryMBean for notification mechanism of monitoring, or starts |
| * a special thread for polling mechanism. After that, it starts eating memory. |
| * Objects are allocated, if "heap" memory is tested; classes are loaded, |
| * if "nonheap" memory is tested; objects are allocated and classes are |
| * loaded, if "mixed" memory is tested. |
| * Notifications are received by the listener in notification mechanism and |
| * crossing of thresholds are detected in polling mechanism. The thresholds |
| * are updated as soon as notification is received, or crossing of a threshold |
| * is detected. |
| * The test also checks stderr to be empty. Otherwise, it fails. The test |
| * exits as soon as OutOfMemoryError is caught (if heap memory is tested) or |
| * all classes are loaded (if nonheap or mixed memory is tested). |
| * All options of the test are specified in *.cfg file. this particular test |
| * - performs access to the MBeans' method through custom MBeanServer; |
| * - fills heap memory; |
| * - implements polling mechanism of monitoring; |
| * - tests usage thresholds. |
| * COMMENTS |
| * Fixed the bug |
| * 4969687 TEST_BUG: The spec is updated accoring to 4956978, 4957000, 4959889 |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm |
| * -XX:-UseGCOverheadLimit |
| * nsk.monitoring.stress.lowmem.lowmem001 |
| * -testMode=server |
| * -MBeanServer=custom |
| * -memory=heap |
| * -monitoring=polling |
| * -threshold=usage |
| */ |
| |
