1 /* 2 * Copyright (c) 2021, 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 java.lang.ref.WeakReference; 25 26 /* 27 * @test 28 * @bug 8260473 29 * @summary Handle leak might cause object not collected as expected 30 * 31 * @run main/othervm -XX:-Inline -XX:-TieredCompilation -XX:CompileCommand=compileonly,UncommonTrapLeak.foo 32 * -XX:CompileThreshold=100 -XX:-BackgroundCompilation UncommonTrapLeak 33 * 34 * @author Hui Shi 35 */ 36 public class UncommonTrapLeak { 37 static WeakReference<Object> ref = null; 38 static int val = 0; main(String args[])39 public static void main(String args[]) { 40 for (int i = 0; i < 300; i++) { 41 val++; 42 foo(i); 43 System.gc(); 44 if (ref.get() != null) { 45 throw new RuntimeException("Failed: referent not collected after trap " + ref.get()); 46 } 47 if (i % 100 == 0) { 48 System.out.println(i); 49 } 50 } 51 } 52 foo(int i)53 static void foo(int i) { 54 Object o = new Object(); 55 ref = new WeakReference<Object>(o); 56 if (val == 200) { 57 // trigger Deoptimization::uncommon_trap 58 if (o instanceof UncommonTrapLeak) { 59 } 60 } 61 } 62 } 63 64