1 /*
2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 /*
27 * @test id=passive
28 * @summary Check that Shenandoah cleans up interned strings
29 * @requires vm.gc.Shenandoah
30 *
31 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
32 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
33 * -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify
34 * TestStringInternCleanup
35 *
36 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
37 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
38 * -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify
39 * TestStringInternCleanup
40 *
41 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
42 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
43 * -XX:+ShenandoahDegeneratedGC
44 * TestStringInternCleanup
45 *
46 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
47 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
48 * -XX:-ShenandoahDegeneratedGC
49 * TestStringInternCleanup
50 */
51
52 /*
53 * @test id=default
54 * @summary Check that Shenandoah cleans up interned strings
55 * @requires vm.gc.Shenandoah
56 *
57 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
58 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
59 * TestStringInternCleanup
60 *
61 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
62 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
63 * -XX:+ShenandoahVerify
64 * TestStringInternCleanup
65 *
66 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
67 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
68 * TestStringInternCleanup
69 *
70 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
71 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
72 * TestStringInternCleanup
73 *
74 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:-ClassUnloadingWithConcurrentMark
75 * -XX:+UseShenandoahGC
76 * TestStringInternCleanup
77 */
78
79 /*
80 * @test id=generational
81 * @summary Check that Shenandoah cleans up interned strings
82 * @requires vm.gc.Shenandoah
83 *
84 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
85 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive -XX:ShenandoahGCMode=generational
86 * -XX:+ShenandoahVerify
87 * TestStringInternCleanup
88 *
89 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
90 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive -XX:ShenandoahGCMode=generational
91 * TestStringInternCleanup
92 */
93
94
95 /*
96 * @test id=iu
97 * @summary Check that Shenandoah cleans up interned strings
98 * @requires vm.gc.Shenandoah
99 *
100 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
101 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
102 * -XX:+ShenandoahVerify
103 * TestStringInternCleanup
104 *
105 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
106 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
107 * -XX:+ShenandoahVerify
108 * TestStringInternCleanup
109 *
110 * @run main/othervm -Xmx64m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+ClassUnloadingWithConcurrentMark
111 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
112 * TestStringInternCleanup
113 */
114
115 public class TestStringInternCleanup {
116
117 static final int COUNT = 1_000_000;
118 static final int WINDOW = 1_000;
119
120 static final String[] reachable = new String[WINDOW];
121
122 public static void main(String[] args) throws Exception {
123 int rIdx = 0;
124 for (int c = 0; c < COUNT; c++) {
125 reachable[rIdx] = ("LargeInternedString" + c).intern();
126 rIdx++;
127 if (rIdx >= WINDOW) {
128 rIdx = 0;
129 }
130 }
131 }
132
133 }