--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/management/MemoryMXBean/MemoryTest.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2003-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 4530538
+ * @summary Basic unit test of MemoryMXBean.getMemoryPools() and
+ * MemoryMXBean.getMemoryManager().
+ * @author Mandy Chung
+ *
+ * @run main MemoryTest 2
+ */
+
+/*
+ * NOTE: This expected result is hardcoded in this test and this test
+ * will be affected if the heap memory layout is changed in
+ * the future implementation.
+ */
+
+import java.lang.management.*;
+import java.util.*;
+
+public class MemoryTest {
+ private static boolean testFailed = false;
+ private static MemoryMXBean mm = ManagementFactory.getMemoryMXBean();
+ private static final int HEAP = 0;
+ private static final int NONHEAP = 1;
+ private static final int NUM_TYPES = 2;
+
+ // WARNING: if the number of pools changes in the future,
+ // this test needs to be modified to handle different version of VMs.
+
+ // Hotspot VM 1.5 expected to have
+ // heap memory pools = 3 (Eden, Survivor spaces, Old gen)
+ // non-heap memory pools = 2 (Perm gen, Code cache)
+ // or 4 if Class Sharing is enabled.
+ // Number of memory managers = 3
+ // They are: Copy/Scavenger + MSC + CodeCache manager
+ // (or equivalent for other collectors)
+ // Number of GC memory managers = 2
+ private static int[] expectedMinNumPools = {3, 2};
+ private static int[] expectedMaxNumPools = {3, 4};
+ private static int expectedNumGCMgrs = 2;
+ private static int expectedNumMgrs = expectedNumGCMgrs + 1;
+ private static String[] types = { "heap", "non-heap" };
+
+ public static void main(String args[]) throws Exception {
+ Integer value = new Integer(args[0]);
+ expectedNumGCMgrs = value.intValue();
+ expectedNumMgrs = expectedNumGCMgrs + 1;
+
+ checkMemoryPools();
+ checkMemoryManagers();
+ if (testFailed)
+ throw new RuntimeException("TEST FAILED.");
+
+ System.out.println("Test passed.");
+
+ }
+
+ private static void checkMemoryPools() throws Exception {
+ List pools = ManagementFactory.getMemoryPoolMXBeans();
+
+ int[] numPools = new int[NUM_TYPES];
+ for (ListIterator iter = pools.listIterator(); iter.hasNext();) {
+ MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next();
+ if (pool.getType() == MemoryType.HEAP) {
+ numPools[HEAP]++;
+ }
+ if (pool.getType() == MemoryType.NON_HEAP) {
+ numPools[NONHEAP]++;
+ }
+ }
+
+ // Check the number of Memory pools
+ for (int i = 0; i < NUM_TYPES; i++) {
+ if (numPools[i] < expectedMinNumPools[i] ||
+ numPools[i] > expectedMaxNumPools[i]) {
+ throw new RuntimeException("TEST FAILED: " +
+ "Number of " + types[i] + " pools = " + numPools[i] +
+ " but expected <= " + expectedMaxNumPools[i] +
+ " and >= " + expectedMinNumPools[i]);
+ }
+ }
+ }
+
+ private static void checkMemoryManagers() throws Exception {
+ List mgrs = ManagementFactory.getMemoryManagerMXBeans();
+
+ int numGCMgr = 0;
+
+ // Check the number of Memory Managers
+ for (ListIterator iter = mgrs.listIterator(); iter.hasNext();) {
+ MemoryManagerMXBean mgr = (MemoryManagerMXBean) iter.next();
+ String[] poolNames = mgr.getMemoryPoolNames();
+ if (poolNames == null || poolNames.length == 0) {
+ throw new RuntimeException("TEST FAILED: " +
+ "Expected to have one or more pools for " +
+ mgr.getName() + "manager.");
+ }
+
+ if (mgr instanceof GarbageCollectorMXBean) {
+ numGCMgr++;
+ } else {
+ for (int i = 0; i < poolNames.length; i++) {
+ checkPoolType(poolNames[i], MemoryType.NON_HEAP);
+ }
+ }
+ }
+
+ if (mgrs.size() != expectedNumMgrs) {
+ throw new RuntimeException("TEST FAILED: " +
+ "Number of memory managers = " + mgrs.size() +
+ " but expected = " + expectedNumMgrs);
+ }
+ if (numGCMgr != expectedNumGCMgrs) {
+ throw new RuntimeException("TEST FAILED: " +
+ "Number of GC managers = " + numGCMgr + " but expected = " +
+ expectedNumGCMgrs);
+ }
+ }
+ private static List pools = ManagementFactory.getMemoryPoolMXBeans();
+ private static void checkPoolType(String name, MemoryType type)
+ throws Exception {
+ for (ListIterator iter = pools.listIterator(); iter.hasNext(); ) {
+ MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next();
+ if (pool.getName().equals(name)) {
+ if (pool.getType() != type) {
+ throw new RuntimeException("TEST FAILED: " +
+ "Pool " + pool.getName() + " is of type " +
+ pool.getType() + " but expected to be " + type);
+ } else {
+ return;
+ }
+ }
+ }
+ throw new RuntimeException("TEST FAILED: " +
+ "Pool " + name + " is of type " + type +
+ " not found");
+ }
+}