1 /*
2 * Copyright (c) 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 /* @test id=passive
26 * @summary Test that garbage in the pinned region does not crash VM
27 * @key randomness
28 * @requires vm.gc.Shenandoah
29 * @library /test/lib
30 *
31 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m
32 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
33 * -XX:+ShenandoahVerify -XX:+ShenandoahDegeneratedGC
34 * TestPinnedGarbage
35 *
36 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m
37 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
38 * -XX:+ShenandoahVerify -XX:-ShenandoahDegeneratedGC
39 * TestPinnedGarbage
40 */
41
42 /* @test id=aggressive
43 * @summary Test that garbage in the pinned region does not crash VM
44 * @key randomness
45 * @requires vm.gc.Shenandoah
46 * @library /test/lib
47 *
48 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m
49 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
50 * TestPinnedGarbage
51 */
52
53 /* @test id=verify
54 * @summary Test that garbage in the pinned region does not crash VM
55 * @key randomness
56 * @requires vm.gc.Shenandoah
57 * @library /test/lib
58 * @run main/othervm/native -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx128m
59 * -XX:+UseShenandoahGC
60 * -XX:+ShenandoahVerify
61 * TestPinnedGarbage
62 */
63
64 import java.util.Arrays;
65 import java.util.Random;
66 import jdk.test.lib.Utils;
67
68 public class TestPinnedGarbage {
69 static {
70 System.loadLibrary("TestPinnedGarbage");
71 }
72
73 private static final int NUM_RUNS = 1_000;
74 private static final int OBJS_COUNT = 1 << 10;
75 private static final int GARBAGE_COUNT = 1 << 18;
76
77 private static native void pin(int[] a);
78 private static native void unpin(int[] a);
79
80 public static void main(String[] args) {
81 Random rng = Utils.getRandomInstance();
82 for (int i = 0; i < NUM_RUNS; i++) {
83 test(rng);
84 }
85 }
86
87 private static void test(Random rng) {
88 Object[] objs = new Object[OBJS_COUNT];
89 for (int i = 0; i < OBJS_COUNT; i++) {
90 objs[i] = new MyClass();
91 }
92
93 int[] cog = new int[10];
94 int cogIdx = rng.nextInt(OBJS_COUNT);
95 objs[cogIdx] = cog;
96 pin(cog);
97
98 for (int i = 0; i < GARBAGE_COUNT; i++) {
99 int rIdx = rng.nextInt(OBJS_COUNT);
100 if (rIdx != cogIdx) {
101 objs[rIdx] = new MyClass();
102 }
103 }
104
105 unpin(cog);
106 }
107
108 public static class MyClass {
109 public Object ref = new Object();
110 }
111
112 }