1 /*
   2  * Copyright (c) 2015, 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 
  24 /*
  25  * @test
  26  * @summary Test checks output displayed with jstat -gc.
  27  *          Test scenario:
  28  *          test forces debuggee application eat ~70% of heap and runs jstat.
  29  *          jstat should show actual usage of old gen (OC/OU ~= old gen usage).
  30  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  31  * @requires vm.gc != "Z"
  32  * @modules java.base/jdk.internal.misc
  33  * @library /test/lib
  34  * @library ../share
  35  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-VerifyDependencies
  36                      -XX:+UsePerfData -XX:MaxNewSize=4m -XX:MaxHeapSize=128M -XX:MaxMetaspaceSize=128M GcTest02
  37  */
  38 import utils.*;
  39 
  40 public class GcTest02 {
  41 
  42     public static void main(String[] args) throws Exception {
  43         // This test produces more than 90_000 classes until it eats up ~70% of the 128M meta space.
  44         // We turn off VerifyDependencies because it slows down the test considerably in debug builds.
  45         new GarbageProducerTest(new JstatGcTool(ProcessHandle.current().pid())).run();
  46     }
  47 }