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 KeepAliveSoftReference 26 * @summary This test case uses a java.lang.ref.SoftReference referencing a class instance to keep a class alive. 27 * @modules java.base/jdk.internal.misc 28 * @library /testlibrary /test/lib /runtime/testlibrary 29 * @library classes 30 * @build KeepAliveSoftReference test.Empty 31 * @build ClassUnloadCommon 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveSoftReference 35 */ 36 37 import java.lang.ref.SoftReference; 38 import sun.hotspot.WhiteBox; 39 40 /** 41 * Test that verifies that classes are not unloaded when specific types of references are kept to them. 42 */ 43 public class KeepAliveSoftReference { 44 private static final String className = "test.Empty"; 45 private static final WhiteBox wb = WhiteBox.getWhiteBox(); 46 47 public static void main(String... args) throws Exception { 48 ClassLoader cl = ClassUnloadCommon.newClassLoader(); 49 Class<?> c = cl.loadClass(className); 50 Object o = c.newInstance(); 51 SoftReference<Object> sr = new SoftReference(o); | 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test KeepAliveSoftReference 26 * @summary This test case uses a java.lang.ref.SoftReference referencing a class instance to keep a class alive. 27 * @modules java.base/jdk.internal.misc 28 * @library /test/lib /runtime/testlibrary 29 * @library classes 30 * @build sun.hotspot.WhiteBox test.Empty 31 * @run main ClassFileInstaller sun.hotspot.WhiteBox 32 * sun.hotspot.WhiteBox$WhiteBoxPermission 33 * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveSoftReference 34 */ 35 36 import java.lang.ref.SoftReference; 37 import sun.hotspot.WhiteBox; 38 39 /** 40 * Test that verifies that classes are not unloaded when specific types of references are kept to them. 41 */ 42 public class KeepAliveSoftReference { 43 private static final String className = "test.Empty"; 44 private static final WhiteBox wb = WhiteBox.getWhiteBox(); 45 46 public static void main(String... args) throws Exception { 47 ClassLoader cl = ClassUnloadCommon.newClassLoader(); 48 Class<?> c = cl.loadClass(className); 49 Object o = c.newInstance(); 50 SoftReference<Object> sr = new SoftReference(o); |