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 8143157
  27  * @summary vmoperation=debug should have logging output
  28  * @library /testlibrary
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @build jdk.test.lib.OutputAnalyzer jdk.test.lib.ProcessTools
  32  * @run driver VMOperationTest
  33  */
  34 
  35 import java.lang.ref.WeakReference;
  36 import jdk.test.lib.OutputAnalyzer;
  37 import jdk.test.lib.ProcessTools;
  38 
  39 public class VMOperationTest {
  40     public static void main(String[] args) throws Exception {
  41         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:vmoperation=debug",
  42                                                                   "-Xmx64m",
  43                                                                   "-Xms64m",
  44                                                                   InternalClass.class.getName());
  45         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  46         output.shouldContain("VM_Operation (");
  47         output.shouldHaveExitValue(0);
  48     }
  49 
  50     public static class InternalClass {
  51         public static byte[] garbage;
  52         public static volatile WeakReference<Object> weakref;
  53 
  54         public static void createweakref() {
  55             Object o = new Object();
  56             weakref = new WeakReference<>(o);
  57         }

   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 8143157
  27  * @summary vmoperation=debug should have logging output
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management

  31  * @run driver VMOperationTest
  32  */
  33 
  34 import java.lang.ref.WeakReference;
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 import jdk.test.lib.process.ProcessTools;
  37 
  38 public class VMOperationTest {
  39     public static void main(String[] args) throws Exception {
  40         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:vmoperation=debug",
  41                                                                   "-Xmx64m",
  42                                                                   "-Xms64m",
  43                                                                   InternalClass.class.getName());
  44         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  45         output.shouldContain("VM_Operation (");
  46         output.shouldHaveExitValue(0);
  47     }
  48 
  49     public static class InternalClass {
  50         public static byte[] garbage;
  51         public static volatile WeakReference<Object> weakref;
  52 
  53         public static void createweakref() {
  54             Object o = new Object();
  55             weakref = new WeakReference<>(o);
  56         }