1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 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 import jdk.test.lib.Asserts; 25 26 /* 27 * @test 28 * @key cte_test 29 * @bug 4784641 30 * @summary -Xcheck:jni overly strict in JNI method IsSameObject 31 * Fixed in JDK1.3.1_10 32 * Fixed in JDK1.4.1_07 33 * @modules java.base/jdk.internal.misc 34 * @library /test/lib 35 * @run main/othervm/native -Xcheck:jni SameObject 36 */ 37 public class SameObject { 38 39 public Object obj = new Object(); 40 41 static { 42 System.loadLibrary("SameObject"); 43 } 44 45 public native void createWeakRef(Object obj); 46 47 public native int checkWeakRef(); 48 49 public static void main(String[] args) throws Exception { 50 SameObject sameObject = new SameObject(); 51 52 int result = sameObject.test(); 53 Asserts.assertEquals(result, 0, "WeakRef still alive"); 54 } 55 56 public int test() { 57 createWeakRef(obj); 58 obj = null; 59 System.gc(); 60 try { 61 Thread.sleep(2000); 62 } catch (InterruptedException ex) { 63 System.out.println("Interrupted"); 64 } 65 66 return checkWeakRef(); 67 } 68 }