1 /*
 2  * Copyright (c) 2020, 2025, 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 package jdk.jfr.event.oldobject;
25 
26 import java.util.ArrayList;
27 import java.util.List;
28 
29 import jdk.jfr.Recording;
30 import jdk.jfr.consumer.RecordedEvent;
31 import jdk.jfr.internal.test.WhiteBox;
32 import jdk.test.lib.jfr.EventNames;
33 import jdk.test.lib.jfr.Events;
34 
35 /**
36  * @test

37  * @requires vm.flagless
38  * @requires vm.hasJFR & vm.gc.Z
39  * @requires vm.opt.final.UseCompactObjectHeaders == false
40  * @summary Test leak profiler with ZGC
41  * @library /test/lib /test/jdk
42  * @modules jdk.jfr/jdk.jfr.internal.test
43  * @run main/othervm  -XX:TLABSize=2k -XX:+UseZGC jdk.jfr.event.oldobject.TestZ
44  */
45 
46 public class TestZ {
47 
48     static private class FindMe {
49     }
50 
51     public static List<FindMe[]> list = new ArrayList<>(OldObjects.MIN_SIZE);
52 
53     public static void main(String[] args) throws Exception {
54         WhiteBox.setWriteAllObjectSamples(true);
55 
56         while (true) {
57             try (Recording r = new Recording()) {
58                 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
59                 r.start();
60                 allocateFindMe();
61                 System.gc();
62                 r.stop();
63                 List<RecordedEvent> events = Events.fromRecording(r);
64                 System.out.println(events);
65                 if (OldObjects.countMatchingEvents(events, FindMe[].class, null, null, -1, "allocateFindMe") > 0) {
66                     return;
67                 }
68                 System.out.println("Could not find leaking object, retrying...");
69             }
70             list.clear();
71         }
72     }
73 
74     public static void allocateFindMe() {
75         for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
76             // Allocate array to trigger sampling code path for interpreter / c1
77             list.add(new FindMe[0]);
78         }
79     }
80 
81 }
--- EOF ---