1 /*
   2  * Copyright (c) 2014, 2015, 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 jdk.test.lib.Asserts;
  25 import java.lang.management.ManagementFactory;
  26 import java.lang.management.MemoryManagerMXBean;
  27 import java.util.HashMap;
  28 import java.util.List;
  29 import java.util.Map;
  30 import java.util.Optional;
  31 import sun.hotspot.code.BlobType;
  32 
  33 /**
  34  * @test MemoryPoolsPresenceTest
  35  * @library /testlibrary /test/lib
  36  * @modules java.management
  37  * @build MemoryPoolsPresenceTest
  38  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  39  *     sun.hotspot.WhiteBox$WhiteBoxPermission
  40  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  41  *     -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache MemoryPoolsPresenceTest
  42  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  43  *     -XX:+WhiteBoxAPI -XX:-SegmentedCodeCache MemoryPoolsPresenceTest
  44  * @summary verify that MemoryManagerMXBean exists for every code cache segment
  45  */
  46 public class MemoryPoolsPresenceTest {
  47 
  48     private static final String CC_MANAGER = "CodeCacheManager";
  49     private final Map<String, Integer> counters = new HashMap<>();
  50 
  51     public static void main(String args[]) {
  52         new MemoryPoolsPresenceTest().runTest();
  53     }
  54 
  55     protected void runTest() {
  56         List<MemoryManagerMXBean> beans
  57                 = ManagementFactory.getMemoryManagerMXBeans();
  58         Optional<MemoryManagerMXBean> any = beans
  59                 .stream()
  60                 .filter(bean -> CC_MANAGER.equals(bean.getName()))
  61                 .findAny();
  62         Asserts.assertTrue(any.isPresent(), "Bean not found: " + CC_MANAGER);
  63         MemoryManagerMXBean ccManager = any.get();
  64         Asserts.assertNotNull(ccManager, "Found null for " + CC_MANAGER);
  65         String names[] = ccManager.getMemoryPoolNames();
  66         for (String name : names) {
  67             counters.put(name, counters.containsKey(name)
  68                     ? counters.get(name) + 1 : 1);
  69         }
  70         for (BlobType btype : BlobType.getAvailable()) {
  71             Asserts.assertEQ(counters.get(btype.getMemoryPool().getName()), 1,
  72                     "Found unexpected amount of beans for pool "
  73                     + btype.getMemoryPool().getName());
  74         }
  75         Asserts.assertEQ(BlobType.getAvailable().size(),
  76                 counters.keySet().size(), "Unexpected amount of bean names");
  77     }
  78 }