1 /*
2  * Copyright (c) 2021, 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
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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
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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
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22  */
23 
24 import java.lang.ref.WeakReference;
25 
26 /*
27  * @test
28  * @bug 8260473
29  * @summary Handle leak might cause object not collected as expected
30  *
31  * @run main/othervm -XX:-Inline -XX:-TieredCompilation -XX:CompileCommand=compileonly,UncommonTrapLeak.foo
32  *                   -XX:CompileThreshold=100 -XX:-BackgroundCompilation UncommonTrapLeak
33  *
34  * @author Hui Shi
35  */
36 public class UncommonTrapLeak {
37     static WeakReference<Object> ref = null;
38     static int val = 0;
main(String args[])39     public static void main(String args[]) {
40         for (int i = 0; i < 300; i++) {
41             val++;
42             foo(i);
43             System.gc();
44             if (ref.get() != null) {
45                 throw new RuntimeException("Failed: referent not collected after trap " + ref.get());
46             }
47             if (i % 100 == 0) {
48                 System.out.println(i);
49             }
50         }
51     }
52 
foo(int i)53     static void foo(int i) {
54         Object o = new Object();
55         ref = new WeakReference<Object>(o);
56         if (val == 200) {
57             // trigger Deoptimization::uncommon_trap
58             if (o instanceof UncommonTrapLeak) {
59             }
60         }
61     }
62 }
63 
64