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 * @modules jdk.management 33 * @run main/othervm -XX:+HeapDumpOnOutOfMemoryError SetVMOption 34 */ 35 36 import java.lang.management.ManagementFactory; 37 import java.util.*; 38 import com.sun.management.HotSpotDiagnosticMXBean; 39 import com.sun.management.VMOption; 40 import com.sun.management.VMOption.Origin; 41 42 public class SetVMOption { 43 private static final String HEAP_DUMP_ON_OOM = "HeapDumpOnOutOfMemoryError"; 44 private static final String EXPECTED_VALUE = "true"; 45 private static final String BAD_VALUE = "yes"; 46 private static final String NEW_VALUE = "false"; 47 private static final String MANAGEMENT_SERVER = "ManagementServer"; 48 private static HotSpotDiagnosticMXBean mbean; 49 50 public static void main(String[] args) throws Exception { 51 mbean = 52 ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class); 53 54 VMOption option = findHeapDumpOnOomOption(); 55 if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) { 56 throw new RuntimeException("Unexpected value: " + 57 option.getValue() + " expected: " + EXPECTED_VALUE); 58 } 59 if (option.getOrigin() != Origin.VM_CREATION) { 60 throw new RuntimeException("Unexpected origin: " + 61 option.getOrigin() + " expected: VM_CREATION"); 62 } 63 if (!option.isWriteable()) { 64 throw new RuntimeException("Expected " + HEAP_DUMP_ON_OOM + 65 " to be writeable"); 66 } 67 68 // set VM option to a new value 69 mbean.setVMOption(HEAP_DUMP_ON_OOM, NEW_VALUE); 70 71 option = findHeapDumpOnOomOption(); 72 if (!option.getValue().equalsIgnoreCase(NEW_VALUE)) { 73 throw new RuntimeException("Unexpected value: " + 74 option.getValue() + " expected: " + NEW_VALUE); 75 } 76 if (option.getOrigin() != Origin.MANAGEMENT) { 77 throw new RuntimeException("Unexpected origin: " + 78 option.getOrigin() + " expected: MANAGEMENT"); 79 } 80 VMOption o = mbean.getVMOption(HEAP_DUMP_ON_OOM); 81 if (!option.getValue().equals(o.getValue())) { 82 throw new RuntimeException("Unmatched value: " + 83 option.getValue() + " expected: " + o.getValue()); 84 } 85 if (!option.getValue().equals(o.getValue())) { 86 throw new RuntimeException("Unmatched value: " + 87 option.getValue() + " expected: " + o.getValue()); 88 } 89 if (option.getOrigin() != o.getOrigin()) { 90 throw new RuntimeException("Unmatched origin: " + 91 option.getOrigin() + " expected: " + o.getOrigin()); 92 } 93 if (option.isWriteable() != o.isWriteable()) { 94 throw new RuntimeException("Unmatched writeable: " + 95 option.isWriteable() + " expected: " + o.isWriteable()); 96 } 97 98 // check if ManagementServer is not writeable 99 List<VMOption> options = mbean.getDiagnosticOptions(); 100 VMOption mgmtServerOption = null; 101 for (VMOption o1 : options) { 102 if (o1.getName().equals(MANAGEMENT_SERVER)) { 103 mgmtServerOption = o1; 104 break; 105 } 106 } 107 if (mgmtServerOption != null) { 108 throw new RuntimeException(MANAGEMENT_SERVER + 109 " is not expected to be writeable"); 110 } 111 mgmtServerOption = mbean.getVMOption(MANAGEMENT_SERVER); 112 if (mgmtServerOption == null) { 113 throw new RuntimeException(MANAGEMENT_SERVER + 114 " should exist."); 115 } 116 if (mgmtServerOption.getOrigin() != Origin.DEFAULT) { 117 throw new RuntimeException(MANAGEMENT_SERVER + 118 " should have the default value."); 119 } 120 if (mgmtServerOption.isWriteable()) { 121 throw new RuntimeException(MANAGEMENT_SERVER + 122 " is not expected to be writeable"); 123 } 124 } 125 126 public static VMOption findHeapDumpOnOomOption() { 127 List<VMOption> options = mbean.getDiagnosticOptions(); 128 VMOption gcDetails = null; 129 for (VMOption o : options) { 130 if (o.getName().equals(HEAP_DUMP_ON_OOM)) { 131 gcDetails = o; 132 break; 133 } 134 } 135 if (gcDetails == null) { 136 throw new RuntimeException("VM option " + HEAP_DUMP_ON_OOM + 137 " not found"); 138 } 139 return gcDetails; 140 } 141 }