1 /*
   2  * Copyright (c) 2013, 2018, 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 package metaspace.stressHierarchy.common;
  24 
  25 import nsk.share.test.ExecutionController;
  26 import nsk.share.test.Tests;
  27 import metaspace.stressHierarchy.common.classloader.tree.Tree;
  28 
  29 /**
  30  * Test checks that ancestors will not be reclaimed while references on descenders are alive.
  31  * We create hierarchy of classes, each loaded by dedicated classloader. Then we cleanup
  32  * references to all nodes except those that are in bottom level. Finally we check that classes
  33  * in bottom level are alive.
  34  */
  35 public class StressHierarchy1 extends StressHierarchyBaseClass {
  36 
  37     public static void main(String[] args) {
  38         try {
  39             StressHierarchyBaseClass.args = args;
  40             Tests.runTest(new StressHierarchy1(), args);
  41         } catch (OutOfMemoryError error) {
  42             System.out.print("Got OOME: " + error.getMessage());
  43         }
  44     }
  45 
  46     @Override
  47     protected void runTestLogic(Tree tree, ExecutionController stresser)
  48             throws Throwable {
  49 
  50         for (int cleanupLevel = tree.getMaxLevel() - 1; cleanupLevel > 1; cleanupLevel--) {
  51             tree.cleanupLevel(cleanupLevel);
  52             log.info("cleanupLevel=" + cleanupLevel);
  53             triggerUnloadingHelper.triggerUnloading(stresser);
  54             if (!stresser.continueExecution()) {
  55                 // pass test
  56                 return;
  57             }
  58         }
  59 
  60         log.info("Check bottom level");
  61         performChecksHelper.checkLevelAlive(tree, tree.getMaxLevel());
  62     }
  63 
  64 }