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17968
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @bug 8011646
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27 * @summary SEGV in compiled code with loop predication
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28 * @run main/othervm -XX:-TieredCompilation -XX:CompileOnly=TestHashCode.m1,Object.hashCode TestHashCode
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29 *
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30 */
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31
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32 public class TestHashCode {
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33 static class A {
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34 int i;
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35 }
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36
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37 static class B extends A {
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38 }
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39
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40 static boolean crash = false;
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41
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42 static A m2() {
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43 if (crash) {
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44 return null;
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45 }
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46 return new A();
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47 }
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48
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49 static int m1(A aa) {
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50 int res = 0;
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51 for (int i = 0; i < 10; i++) {
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52 A a = m2();
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53 int j = a.i;
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54 if (aa instanceof B) {
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55 }
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56 res += a.hashCode();
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57 }
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58 return res;
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59 }
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60
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61 public static void main(String[] args) {
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62 A a = new A();
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63 for (int i = 0; i < 20000; i++) {
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64 m1(a);
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65 }
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66 crash = true;
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67 try {
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68 m1(a);
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69 } catch (NullPointerException e) {
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70 System.out.println("Test passed");
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71 }
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72 }
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73 }
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