1 /*
   2  * Copyright (c) 2014, 2016, 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 /**
  25  * @test MemoryPoolsPresenceTest
  26  * @summary verify that MemoryManagerMXBean exists for every code cache segment

  27  * @modules java.base/jdk.internal.misc
  28  *          java.management
  29  * @library /test/lib
  30  *
  31  * @build sun.hotspot.WhiteBox
  32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  33  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  35  *     -XX:+WhiteBoxAPI
  36  *     -XX:+SegmentedCodeCache
  37  *     compiler.codecache.jmx.MemoryPoolsPresenceTest
  38  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  39  *     -XX:+WhiteBoxAPI
  40  *     -XX:-SegmentedCodeCache
  41  *     compiler.codecache.jmx.MemoryPoolsPresenceTest
  42  */
  43 
  44 package compiler.codecache.jmx;
  45 
  46 import jdk.test.lib.Asserts;
  47 import sun.hotspot.code.BlobType;
  48 
  49 import java.lang.management.ManagementFactory;
  50 import java.lang.management.MemoryManagerMXBean;
  51 import java.util.HashMap;
  52 import java.util.List;
  53 import java.util.Map;
  54 import java.util.Optional;
  55 
  56 public class MemoryPoolsPresenceTest {
  57 
  58     private static final String CC_MANAGER = "CodeCacheManager";
  59     private final Map<String, Integer> counters = new HashMap<>();
  60 
  61     public static void main(String args[]) {
  62         new MemoryPoolsPresenceTest().runTest();
  63     }
  64 
  65     protected void runTest() {
  66         List<MemoryManagerMXBean> beans
  67                 = ManagementFactory.getMemoryManagerMXBeans();
  68         Optional<MemoryManagerMXBean> any = beans
  69                 .stream()
  70                 .filter(bean -> CC_MANAGER.equals(bean.getName()))
  71                 .findAny();
  72         Asserts.assertTrue(any.isPresent(), "Bean not found: " + CC_MANAGER);
  73         MemoryManagerMXBean ccManager = any.get();
  74         Asserts.assertNotNull(ccManager, "Found null for " + CC_MANAGER);
  75         String names[] = ccManager.getMemoryPoolNames();
  76         for (String name : names) {
  77             counters.put(name, counters.containsKey(name)
  78                     ? counters.get(name) + 1 : 1);
  79         }
  80         for (BlobType btype : BlobType.getAvailable()) {
  81             Asserts.assertEQ(counters.get(btype.getMemoryPool().getName()), 1,
  82                     "Found unexpected amount of beans for pool "
  83                     + btype.getMemoryPool().getName());
  84         }
  85         Asserts.assertEQ(BlobType.getAvailable().size(),
  86                 counters.keySet().size(), "Unexpected amount of bean names");
  87     }
  88 }
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