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 KeepAliveClassLoader 26 * @summary This test case uses a java.lang.ClassLoader instance to keep a class alive. 27 * @library /testlibrary /testlibrary/whitebox /runtime/testlibrary 28 * @library classes 29 * @build KeepAliveClassLoader test.Empty 30 * @build ClassUnloadCommon 31 * @run main ClassFileInstaller sun.hotspot.WhiteBox 32 * sun.hotspot.WhiteBox$WhiteBoxPermission 33 * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveClassLoader 34 */ 35 36 import sun.hotspot.WhiteBox; 37 38 /** 39 * Test that verifies that classes are not unloaded when specific types of references are kept to them. 40 */ 41 public class KeepAliveClassLoader { 42 private static final String className = "test.Empty"; 43 private static final WhiteBox wb = WhiteBox.getWhiteBox(); 44 public static Object escape = null; 45 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 o = null; c = null; 52 escape = cl; 53 54 { 55 boolean isAlive = wb.isClassAlive(className); 56 System.out.println("testClassLoader (1) alive: " + isAlive); | 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 KeepAliveClassLoader 26 * @summary This test case uses a java.lang.ClassLoader instance to keep a class alive. 27 * @library /testlibrary /../../test/lib /runtime/testlibrary 28 * @library classes 29 * @build KeepAliveClassLoader test.Empty 30 * @build ClassUnloadCommon 31 * @run main ClassFileInstaller jdk.testlib.WhiteBox 32 * jdk.testlib.WhiteBox$WhiteBoxPermission 33 * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveClassLoader 34 */ 35 36 import jdk.testlib.WhiteBox; 37 38 /** 39 * Test that verifies that classes are not unloaded when specific types of references are kept to them. 40 */ 41 public class KeepAliveClassLoader { 42 private static final String className = "test.Empty"; 43 private static final WhiteBox wb = WhiteBox.getWhiteBox(); 44 public static Object escape = null; 45 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 o = null; c = null; 52 escape = cl; 53 54 { 55 boolean isAlive = wb.isClassAlive(className); 56 System.out.println("testClassLoader (1) alive: " + isAlive); |