1 /*
2 * Copyright (c) 2005, 2015, 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
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
26 * @bug 6314913
27 * @summary Basic Test for HotSpotDiagnosticMXBean.setVMOption()
28 * and getDiagnosticOptions().
29 * @author Mandy Chung
30 * @author Jaroslav Bachorik
31 *
32 * @run main/othervm -XX:+HeapDumpOnOutOfMemoryError SetVMOption
33 */
34
35 import java.lang.management.ManagementFactory;
36 import java.util.*;
37 import com.sun.management.HotSpotDiagnosticMXBean;
38 import com.sun.management.VMOption;
39 import com.sun.management.VMOption.Origin;
40
41 public class SetVMOption {
42 private static final String HEAP_DUMP_ON_OOM = "HeapDumpOnOutOfMemoryError";
43 private static final String EXPECTED_VALUE = "true";
44 private static final String BAD_VALUE = "yes";
45 private static final String NEW_VALUE = "false";
46 private static final String MANAGEMENT_SERVER = "ManagementServer";
47 private static HotSpotDiagnosticMXBean mbean;
48
49 public static void main(String[] args) throws Exception {
50 mbean =
51 ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
52
53 VMOption option = findHeapDumpOnOomOption();
54 if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) {
55 throw new RuntimeException("Unexpected value: " +
56 option.getValue() + " expected: " + EXPECTED_VALUE);
57 }
58 if (option.getOrigin() != Origin.VM_CREATION) {
59 throw new RuntimeException("Unexpected origin: " +
60 option.getOrigin() + " expected: VM_CREATION");
61 }
62 if (!option.isWriteable()) {
63 throw new RuntimeException("Expected " + HEAP_DUMP_ON_OOM +
64 " to be writeable");
65 }
66
67 // set VM option to a new value
68 mbean.setVMOption(HEAP_DUMP_ON_OOM, NEW_VALUE);
69
70 option = findHeapDumpOnOomOption();
71 if (!option.getValue().equalsIgnoreCase(NEW_VALUE)) {
72 throw new RuntimeException("Unexpected value: " +
73 option.getValue() + " expected: " + NEW_VALUE);
74 }
75 if (option.getOrigin() != Origin.MANAGEMENT) {
76 throw new RuntimeException("Unexpected origin: " +
77 option.getOrigin() + " expected: MANAGEMENT");
78 }
79 VMOption o = mbean.getVMOption(HEAP_DUMP_ON_OOM);
80 if (!option.getValue().equals(o.getValue())) {
81 throw new RuntimeException("Unmatched value: " +
82 option.getValue() + " expected: " + o.getValue());
83 }
84 if (!option.getValue().equals(o.getValue())) {
85 throw new RuntimeException("Unmatched value: " +
86 option.getValue() + " expected: " + o.getValue());
87 }
88 if (option.getOrigin() != o.getOrigin()) {
89 throw new RuntimeException("Unmatched origin: " +
90 option.getOrigin() + " expected: " + o.getOrigin());
91 }
92 if (option.isWriteable() != o.isWriteable()) {
93 throw new RuntimeException("Unmatched writeable: " +
94 option.isWriteable() + " expected: " + o.isWriteable());
95 }
96
97 // check if ManagementServer is not writeable
98 List<VMOption> options = mbean.getDiagnosticOptions();
99 VMOption mgmtServerOption = null;
100 for (VMOption o1 : options) {
101 if (o1.getName().equals(MANAGEMENT_SERVER)) {
102 mgmtServerOption = o1;
103 break;
104 }
105 }
106 if (mgmtServerOption != null) {
107 throw new RuntimeException(MANAGEMENT_SERVER +
108 " is not expected to be writeable");
109 }
110 mgmtServerOption = mbean.getVMOption(MANAGEMENT_SERVER);
111 if (mgmtServerOption == null) {
112 throw new RuntimeException(MANAGEMENT_SERVER +
113 " should exist.");
114 }
115 if (mgmtServerOption.getOrigin() != Origin.DEFAULT) {
116 throw new RuntimeException(MANAGEMENT_SERVER +
117 " should have the default value.");
118 }
119 if (mgmtServerOption.isWriteable()) {
120 throw new RuntimeException(MANAGEMENT_SERVER +
121 " is not expected to be writeable");
122 }
123 }
124
125 public static VMOption findHeapDumpOnOomOption() {
126 List<VMOption> options = mbean.getDiagnosticOptions();
127 VMOption gcDetails = null;
128 for (VMOption o : options) {
129 if (o.getName().equals(HEAP_DUMP_ON_OOM)) {
130 gcDetails = o;
131 break;
132 }
133 }
134 if (gcDetails == null) {
135 throw new RuntimeException("VM option " + HEAP_DUMP_ON_OOM +
136 " not found");
137 }
138 return gcDetails;
139 }
140 }