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  * @key gc
  27  * @bug 8049831
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @build sun.hotspot.WhiteBox
  32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestCapacityUntilGCWrapAround
  35  */
  36 
  37 import sun.hotspot.WhiteBox;
  38 
  39 import jdk.test.lib.Asserts;
  40 import jdk.test.lib.Platform;
  41 
  42 public class TestCapacityUntilGCWrapAround {
  43     private static long MB = 1024 * 1024;
  44     private static long GB = 1024 * MB;
  45     private static long MAX_UINT = 4 * GB - 1; // On 32-bit platforms
  46 
  47     public static void main(String[] args) {
  48         if (Platform.is32bit()) {
  49             WhiteBox wb = WhiteBox.getWhiteBox();
  50 
  51             long before = wb.metaspaceCapacityUntilGC();
  52             // Now force possible overflow of capacity_until_GC.
  53             long after = wb.incMetaspaceCapacityUntilGC(MAX_UINT);
  54 

  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  * @key gc
  27  * @bug 8049831
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @build sun.hotspot.WhiteBox
  32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xlog:safepoint+stats=debug:gc.log TestCapacityUntilGCWrapAround
  35  */
  36 
  37 import sun.hotspot.WhiteBox;
  38 
  39 import jdk.test.lib.Asserts;
  40 import jdk.test.lib.Platform;
  41 
  42 public class TestCapacityUntilGCWrapAround {
  43     private static long MB = 1024 * 1024;
  44     private static long GB = 1024 * MB;
  45     private static long MAX_UINT = 4 * GB - 1; // On 32-bit platforms
  46 
  47     public static void main(String[] args) {
  48         if (Platform.is32bit()) {
  49             WhiteBox wb = WhiteBox.getWhiteBox();
  50 
  51             long before = wb.metaspaceCapacityUntilGC();
  52             // Now force possible overflow of capacity_until_GC.
  53             long after = wb.incMetaspaceCapacityUntilGC(MAX_UINT);
  54