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 TestEagerReclaimHumongousRegionsWithRefs
  26  * @bug 8048179
  27  * @summary Test to make sure that eager reclaim of humongous objects that have previously
  28  * been referenced by other old gen regions work. We simply try to fill
  29  * up the heap with humongous objects and create a remembered set entry from an object by
  30  * referencing that we know is in the old gen. After changing this reference, the object
  31  * should still be eagerly reclaimable to avoid Full GC.
  32  * @key gc
  33  * @library /testlibrary
  34  * @modules java.base/jdk.internal.misc
  35  *          java.management
  36  */
  37 
  38 import java.util.regex.Pattern;
  39 import java.util.regex.Matcher;
  40 import java.util.LinkedList;
  41 
  42 import jdk.test.lib.OutputAnalyzer;
  43 import jdk.test.lib.ProcessTools;
  44 import static jdk.test.lib.Asserts.*;
  45 
  46 class RefHolder {
  47   Object ref;
  48 }
  49 
  50 class ReclaimRegionFast {
  51 
  52     public static final int M = 1024*1024;
  53 
  54     public static LinkedList<Object> garbageList = new LinkedList<Object>();
  55 
  56     public static void genGarbage() {
  57         for (int i = 0; i < 32*1024; i++) {
  58             garbageList.add(new int[100]);
  59         }
  60         garbageList.clear();
  61     }
  62 
  63 

  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 TestEagerReclaimHumongousRegionsWithRefs
  26  * @bug 8048179
  27  * @summary Test to make sure that eager reclaim of humongous objects that have previously
  28  * been referenced by other old gen regions work. We simply try to fill
  29  * up the heap with humongous objects and create a remembered set entry from an object by
  30  * referencing that we know is in the old gen. After changing this reference, the object
  31  * should still be eagerly reclaimable to avoid Full GC.
  32  * @key gc
  33  * @library /test/lib
  34  * @modules java.base/jdk.internal.misc
  35  *          java.management
  36  */
  37 
  38 import java.util.regex.Pattern;
  39 import java.util.regex.Matcher;
  40 import java.util.LinkedList;
  41 
  42 import jdk.test.lib.process.OutputAnalyzer;
  43 import jdk.test.lib.process.ProcessTools;
  44 import static jdk.test.lib.Asserts.*;
  45 
  46 class RefHolder {
  47   Object ref;
  48 }
  49 
  50 class ReclaimRegionFast {
  51 
  52     public static final int M = 1024*1024;
  53 
  54     public static LinkedList<Object> garbageList = new LinkedList<Object>();
  55 
  56     public static void genGarbage() {
  57         for (int i = 0; i < 32*1024; i++) {
  58             garbageList.add(new int[100]);
  59         }
  60         garbageList.clear();
  61     }
  62 
  63