6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   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 UnloadTest
  26  * @library /runtime/testlibrary /testlibrary /testlibrary/whitebox
  27  * @library classes
  28  * @build ClassUnloadCommon test.Empty
  29  * @build UnloadTest
  30  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  32  * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI UnloadTest
  33  */
  34 import sun.hotspot.WhiteBox;
  35 
  36 /**
  37  * Test that verifies that classes are unloaded when they are no longer reachable.
  38  *
  39  * The test creates a class loader, uses the loader to load a class and creates an instance
  40  * of that class. The it nulls out all the references to the instance, class and class loader
  41  * and tries to trigger class unloading. Then it verifies that the class is no longer
  42  * loaded by the VM.
  43  */
  44 public class UnloadTest {
  45     private static String className = "test.Empty";
  46 
  47     public static void main(String... args) throws Exception {
  48        run();
  49     }
  50 
  51     private static void run() throws Exception {
  52         final WhiteBox wb = WhiteBox.getWhiteBox();
  53 
  54         ClassUnloadCommon.failIf(wb.isClassAlive(className), "is not expected to be alive yet");

   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   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 UnloadTest
  26  * @library /runtime/testlibrary /testlibrary /../../test/lib
  27  * @library classes
  28  * @build ClassUnloadCommon test.Empty
  29  * @build UnloadTest
  30  * @run main ClassFileInstaller jdk.testlib.WhiteBox
  31  *                              jdk.testlib.WhiteBox$WhiteBoxPermission
  32  * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI UnloadTest
  33  */
  34 import jdk.testlib.WhiteBox;
  35 
  36 /**
  37  * Test that verifies that classes are unloaded when they are no longer reachable.
  38  *
  39  * The test creates a class loader, uses the loader to load a class and creates an instance
  40  * of that class. The it nulls out all the references to the instance, class and class loader
  41  * and tries to trigger class unloading. Then it verifies that the class is no longer
  42  * loaded by the VM.
  43  */
  44 public class UnloadTest {
  45     private static String className = "test.Empty";
  46 
  47     public static void main(String... args) throws Exception {
  48        run();
  49     }
  50 
  51     private static void run() throws Exception {
  52         final WhiteBox wb = WhiteBox.getWhiteBox();
  53 
  54         ClassUnloadCommon.failIf(wb.isClassAlive(className), "is not expected to be alive yet");