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 import java.lang.management.ManagementFactory;
  25 import java.lang.management.MemoryPoolMXBean;
  26 import java.util.Objects;
  27 import java.util.Optional;
  28 import java.util.regex.Matcher;
  29 import java.util.regex.Pattern;
  30 
  31 import com.oracle.java.testlibrary.Asserts;
  32 import com.sun.management.ThreadMXBean;
  33 import sun.hotspot.WhiteBox;
  34 import sun.misc.Unsafe;
  35 
  36 /**
  37  * Main class for tests on {@code SurvivorAlignmentInBytes} option.
  38  *
  39  * Typical usage is to obtain instance using fromArgs method, allocate objects
  40  * and verify that actual memory usage in tested heap space is close to
  41  * expected.
  42  */
  43 public class SurvivorAlignmentTestMain {
  44     enum HeapSpace {
  45         EDEN,
  46         SURVIVOR,
  47         TENURED
  48     }
  49 
  50     public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  51 
  52     public static final long MAX_TENURING_THRESHOLD = Optional.ofNullable(
  53             SurvivorAlignmentTestMain.WHITE_BOX.getIntxVMFlag(

  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 import java.lang.management.ManagementFactory;
  25 import java.lang.management.MemoryPoolMXBean;
  26 import java.util.Objects;
  27 import java.util.Optional;
  28 import java.util.regex.Matcher;
  29 import java.util.regex.Pattern;
  30 
  31 import com.oracle.java.testlibrary.Asserts;
  32 import com.sun.management.ThreadMXBean;
  33 import jdk.testlib.WhiteBox;
  34 import sun.misc.Unsafe;
  35 
  36 /**
  37  * Main class for tests on {@code SurvivorAlignmentInBytes} option.
  38  *
  39  * Typical usage is to obtain instance using fromArgs method, allocate objects
  40  * and verify that actual memory usage in tested heap space is close to
  41  * expected.
  42  */
  43 public class SurvivorAlignmentTestMain {
  44     enum HeapSpace {
  45         EDEN,
  46         SURVIVOR,
  47         TENURED
  48     }
  49 
  50     public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  51 
  52     public static final long MAX_TENURING_THRESHOLD = Optional.ofNullable(
  53             SurvivorAlignmentTestMain.WHITE_BOX.getIntxVMFlag(