6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23 /*
24 * @test TestHumongous
25 * @summary test reclaim of humongous object
26 * @run main/othervm -Xint -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=1M -XX:+ShenandoahLogConfig TestHumongous
27 */
28
29 public class TestHumongous {
30 // Shenandoah heap memory region size = 1 M
31 private static int M = 1024 * 1024;
32 public static void main(String[] args) {
33 // Construct a humongous object (oop) just fits multiple regions
34 // 8 bytes for object header, 8 bytes for brooks pointer
35 int size = 2 * M - 8 - 8;
36 // The oop spans 2 regions
37 char[] ch = new char[size];
38 for (int index = 0; index < 10; index ++) {
39 ch[index] = 'A';
40 }
41
42 System.out.print(ch[1]);
43 ch = null;
44 // Force a GC to clean up above object
45 System.gc();
46 }
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6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23 /*
24 * @test TestHumongous
25 * @summary test reclaim of humongous object
26 * @run main/othervm -Xint -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=1M TestHumongous
27 */
28
29 public class TestHumongous {
30 // Shenandoah heap memory region size = 1 M
31 private static int M = 1024 * 1024;
32 public static void main(String[] args) {
33 // Construct a humongous object (oop) just fits multiple regions
34 // 8 bytes for object header, 8 bytes for brooks pointer
35 int size = 2 * M - 8 - 8;
36 // The oop spans 2 regions
37 char[] ch = new char[size];
38 for (int index = 0; index < 10; index ++) {
39 ch[index] = 'A';
40 }
41
42 System.out.print(ch[1]);
43 ch = null;
44 // Force a GC to clean up above object
45 System.gc();
46 }
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