1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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.
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  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 }