1 /* 2 * Copyright (c) 2014, 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 /* 25 * @test 26 * @bug 8011646 27 * @summary SEGV in compiled code with loop predication 28 * @run main/othervm -XX:-TieredCompilation -XX:CompileOnly=TestHashCode.m1,Object.hashCode TestHashCode 29 * 30 */ 31 32 public class TestHashCode { 33 static class A { 34 int i; 35 } 36 37 static class B extends A { 38 } 39 40 static boolean crash = false; 41 42 static A m2() { 43 if (crash) { 44 return null; 45 } 46 return new A(); 47 } 48 49 static int m1(A aa) { 50 int res = 0; 51 for (int i = 0; i < 10; i++) { 52 A a = m2(); 53 int j = a.i; 54 if (aa instanceof B) { 55 } 56 res += a.hashCode(); 57 } 58 return res; 59 } 60 61 public static void main(String[] args) { 62 A a = new A(); 63 for (int i = 0; i < 20000; i++) { 64 m1(a); 65 } 66 crash = true; 67 try { 68 m1(a); 69 } catch (NullPointerException e) { 70 System.out.println("Test passed"); 71 } 72 } 73 }