1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.util.List;
  25 import java.lang.management.*;
  26 import com.oracle.java.testlibrary.*;
  27 import static com.oracle.java.testlibrary.Asserts.*;
  28 
  29 /* @test TestMetaspaceMemoryPool
  30  * @bug 8000754
  31  * @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a
  32  *          MemoryManagerMXBean is created.
  33  * @library /testlibrary
  34  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool
  35  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool
  36  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers TestMetaspaceMemoryPool
  37  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:CompressedClassSpaceSize=60m TestMetaspaceMemoryPool
  38  */
  39 public class TestMetaspaceMemoryPool {
  40     public static void main(String[] args) {
  41         verifyThatMetaspaceMemoryManagerExists();
  42 
  43         boolean isMetaspaceMaxDefined = InputArguments.containsPrefix("-XX:MaxMetaspaceSize");
  44         verifyMemoryPool(getMemoryPool("Metaspace"), isMetaspaceMaxDefined);
  45 
  46         if (Platform.is64bit()) {
  47             if (InputArguments.contains("-XX:+UseCompressedOops")) {
  48                 MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space");
  49                 verifyMemoryPool(cksPool, true);
  50             }
  51         }
  52     }
  53 
  54     private static void verifyThatMetaspaceMemoryManagerExists() {
  55         List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
  56         for (MemoryManagerMXBean manager : managers) {
  57             if (manager.getName().equals("Metaspace Manager")) {
  58                 return;
  59             }
  60         }
  61 
  62         throw new RuntimeException("Expected to find a metaspace memory manager");
  63     }
  64 
  65     private static MemoryPoolMXBean getMemoryPool(String name) {
  66         List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
  67         for (MemoryPoolMXBean pool : pools) {
  68             if (pool.getName().equals(name)) {
  69                 return pool;
  70             }
  71         }
  72 
  73         throw new RuntimeException("Expected to find a memory pool with name " + name);
  74     }
  75 
  76     private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) {
  77         MemoryUsage mu = pool.getUsage();
  78         long init = mu.getInit();
  79         long used = mu.getUsed();
  80         long committed = mu.getCommitted();
  81         long max = mu.getMax();
  82 
  83         assertGTE(init, 0L);
  84         assertGTE(used, init);
  85         assertGTE(committed, used);
  86 
  87         if (isMaxDefined) {
  88             assertGTE(max, committed);
  89         } else {
  90             assertEQ(max, -1L);
  91         }
  92     }
  93 }