1 /*
   2  * Copyright (c) 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.event.oldobject;
  27 
  28 import java.util.ArrayList;
  29 import java.util.List;
  30 
  31 import jdk.jfr.Recording;
  32 import jdk.jfr.consumer.RecordedEvent;
  33 import jdk.test.lib.jfr.EventNames;
  34 import jdk.test.lib.jfr.Events;
  35 
  36 /**
  37  * @test
  38  * @key jfr
  39  *
  40  *
  41  * @library /lib /
  42  * @summary Purpose of this test is to run leak profiler without command line tweaks or WhiteBox hacks until we succeed
  43  * @run main/othervm jdk.jfr.event.oldobject.TestSanityDefault
  44  */
  45 public class TestSanityDefault {
  46 
  47     static private class FindMe {
  48     }
  49 
  50     public static List<FindMe> list = new ArrayList<>(OldObjects.MIN_SIZE);
  51 
  52     public static void main(String[] args) throws Exception {
  53         // Should not use WhiteBox API, we want to execute actual code paths
  54 
  55         // Trigger c2 compilation, so we get sample
  56         for (long i = 0; i < 100_000_000; i++) {
  57             allocateFindMe(true);
  58         }
  59 
  60 
  61         // It's hard to get samples with interpreter / C1 so loop until we do
  62         while (true) {
  63             try (Recording r = new Recording()) {
  64                 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
  65                 r.start();
  66                 allocateFindMe(false);
  67                 System.gc();
  68                 r.stop();
  69                 List<RecordedEvent> events = Events.fromRecording(r);
  70                 if (OldObjects.countMatchingEvents(events, FindMe.class, null, null, -1, "allocateFindMe") > 0) {
  71                     return;
  72                 }
  73                 // no events found, retry
  74             }
  75         }
  76     }
  77 
  78     public static void allocateFindMe(boolean doNothing) {
  79         if (doNothing) {
  80             return;
  81         }
  82         for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
  83             // Purposely don't allocate array, so we at least
  84             // in one old-object test check an ordinary object.
  85             list.add(new FindMe());
  86         }
  87     }
  88 }