1 /*
2 * Copyright (c) 2017, 2018, Red Hat, Inc. 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 /*
26 * @test id=passive
27 * @summary Check that Shenandoah cleans up interned strings
28 * @requires vm.gc.Shenandoah
29 *
30 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
31 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
32 * -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify
33 * TestStringInternCleanup
34 *
35 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
36 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
37 * -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify
38 * TestStringInternCleanup
39 *
40 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
41 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
42 * -XX:+ShenandoahDegeneratedGC
43 * TestStringInternCleanup
44 *
45 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
46 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
47 * -XX:-ShenandoahDegeneratedGC
48 * TestStringInternCleanup
49 */
50
51 /*
52 * @test id=default
53 * @summary Check that Shenandoah cleans up interned strings
54 * @requires vm.gc.Shenandoah
55 *
56 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
57 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
58 * TestStringInternCleanup
59 *
60 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
61 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
62 * -XX:+ShenandoahVerify
63 * TestStringInternCleanup
64 *
65 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
66 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
67 * TestStringInternCleanup
68 *
69 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
70 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
71 * TestStringInternCleanup
72 *
73 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:-ClassUnloadingWithConcurrentMark
74 * -XX:+UseShenandoahGC
75 * TestStringInternCleanup
76 */
77
78 public class TestStringInternCleanup {
79
80 static final int COUNT = 1_000_000;
81 static final int WINDOW = 1_000;
82
83 static final String[] reachable = new String[WINDOW];
84
85 public static void main(String[] args) throws Exception {
86 int rIdx = 0;
87 for (int c = 0; c < COUNT; c++) {
88 reachable[rIdx] = ("LargeInternedString" + c).intern();
89 rIdx++;
90 if (rIdx >= WINDOW) {
91 rIdx = 0;
92 }
93 }
94 }
95
96 }