0N/A/*
2362N/A * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
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0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 4982301
0N/A * @summary Sanity Test for GarbageCollectorMXBean.getLastGcInfo().
0N/A * @author Mandy Chung
0N/A *
0N/A * @run main LastGCInfo
0N/A */
0N/A
0N/Aimport java.lang.management.ManagementFactory;
0N/Aimport java.lang.management.MemoryUsage;
0N/Aimport java.lang.management.MemoryPoolMXBean;
0N/Aimport java.util.*;
0N/Aimport com.sun.management.GcInfo;
0N/Aimport com.sun.management.GarbageCollectorMXBean;
0N/A
0N/Apublic class LastGCInfo {
0N/A public static void main(String[] argv) throws Exception {
0N/A boolean hasGcInfo = false;
0N/A
0N/A System.gc();
0N/A List mgrs = ManagementFactory.getGarbageCollectorMXBeans();
0N/A for (ListIterator iter = mgrs.listIterator(); iter.hasNext(); ) {
0N/A Object mgr = iter.next();
0N/A if (mgr instanceof GarbageCollectorMXBean) {
0N/A GarbageCollectorMXBean gc = (GarbageCollectorMXBean) mgr;
0N/A GcInfo info = gc.getLastGcInfo();
0N/A if (info != null) {
0N/A checkGcInfo(gc.getName(), info);
0N/A hasGcInfo = true;
0N/A }
0N/A }
0N/A }
0N/A
0N/A if (! hasGcInfo) {
0N/A throw new RuntimeException("No GcInfo returned");
0N/A }
0N/A System.out.println("Test passed.");
0N/A }
0N/A
0N/A private static void checkGcInfo(String name, GcInfo info) throws Exception {
0N/A System.out.println("GC statistic for : " + name);
0N/A System.out.print("GC #" + info.getId());
0N/A System.out.print(" start:" + info.getStartTime());
0N/A System.out.print(" end:" + info.getEndTime());
0N/A System.out.println(" (" + info.getDuration() + "ms)");
0N/A Map usage = info.getMemoryUsageBeforeGc();
0N/A
0N/A List pnames = new ArrayList();
0N/A for (Iterator iter = usage.entrySet().iterator(); iter.hasNext(); ) {
0N/A Map.Entry entry = (Map.Entry) iter.next();
0N/A String poolname = (String) entry.getKey();
0N/A pnames.add(poolname);
0N/A MemoryUsage busage = (MemoryUsage) entry.getValue();
0N/A MemoryUsage ausage = (MemoryUsage) info.getMemoryUsageAfterGc().get(poolname);
0N/A if (ausage == null) {
0N/A throw new RuntimeException("After Gc Memory does not exist" +
0N/A " for " + poolname);
0N/A }
0N/A System.out.println("Usage for pool " + poolname);
0N/A System.out.println(" Before GC: " + busage);
0N/A System.out.println(" After GC: " + ausage);
0N/A }
0N/A
0N/A // check if memory usage for all memory pools are returned
0N/A List pools = ManagementFactory.getMemoryPoolMXBeans();
0N/A for (Iterator iter = pools.iterator(); iter.hasNext(); ) {
0N/A MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
0N/A if (!pnames.contains(p.getName())) {
0N/A throw new RuntimeException("GcInfo does not contain " +
0N/A "memory usage for pool " + p.getName());
0N/A }
0N/A }
0N/A }
0N/A}