1 /*
2 * Copyright (c) 2017, 2020, 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=aggressive
27 * @summary Tests JVMTI heap dumps
28 * @requires vm.gc.Shenandoah
29 * @requires vm.jvmti
30 * @compile TestHeapDump.java
31 * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump
32 * -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
33 * -XX:+UseShenandoahGC -Xmx128m
34 * -XX:ShenandoahGCHeuristics=aggressive
35 * TestHeapDump
36 *
37 */
38
39 /**
40 * @test id=no-coops-aggressive
41 * @summary Tests JVMTI heap dumps
42 * @requires vm.gc.Shenandoah
43 * @requires vm.jvmti
44 * @requires vm.bits == "64"
45 * @compile TestHeapDump.java
46 * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump
47 * -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
48 * -XX:+UseShenandoahGC -Xmx128m
49 * -XX:ShenandoahGCHeuristics=aggressive
50 * -XX:-UseCompressedOops TestHeapDump
51 */
52
53 /**
54 * @test id=aggressive-strdedup
55 * @summary Tests JVMTI heap dumps
56 * @requires vm.gc.Shenandoah
57 * @requires vm.jvmti
58 * @compile TestHeapDump.java
59 * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump
60 * -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
61 * -XX:+UseShenandoahGC -Xmx128m
62 * -XX:ShenandoahGCHeuristics=aggressive
63 * -XX:+UseStringDeduplication TestHeapDump
64 */
65
66 import java.lang.ref.Reference;
67
68 public class TestHeapDump {
69
70 private static final int NUM_ITER = 10000;
71
72 private static final int ARRAY_SIZE = 1000;
73
74 private static final int EXPECTED_OBJECTS =
75 ARRAY_SIZE + // array reachable from instance field
76 1 + // static field root
77 1; // local field root
78
79 static {
80 try {
81 System.loadLibrary("TestHeapDump");
82 } catch (UnsatisfiedLinkError ule) {
83 System.err.println("Could not load TestHeapDump library");
84 System.err.println("java.library.path: "
85 + System.getProperty("java.library.path"));
86 throw ule;
87 }
88 }
89
90 native static int heapdump(Class<?> filterClass);
91
92 public static void main(String args[]) {
93 new TestHeapDump().run();
94 }
95
96 // This root needs to be discovered
97 static Object root = new TestObject();
98
99 // This field needs to be discovered
100 TestObject[] array;
101
102 public void run() {
103 array = new TestObject[ARRAY_SIZE];
104 for (int i = 0; i < ARRAY_SIZE; i++) {
105 array[i] = new TestObject();
106 }
107 TestObject localRoot = new TestObject();
108 for (int i = 0; i < NUM_ITER; i++) {
109 int numObjs = heapdump(TestObject.class);
110 if (numObjs != EXPECTED_OBJECTS) {
111 throw new RuntimeException("Expected " + EXPECTED_OBJECTS + " objects, but got " + numObjs);
112 }
113 }
114 Reference.reachabilityFence(array);
115 Reference.reachabilityFence(localRoot);
116 }
117
118 // We look for the instances of this class during the heap scan
119 public static class TestObject {}
120 }