Mercurial > hg > truffle

annotate test/compiler/6478991/NullCheckTest.java @ 18408:2c3666f44855

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Truffle: initial commit of object API implementation
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 23:19:43 +0100
parents 15559220ce79
children
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1 /*
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2 * Copyright (c) 2011, 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 /**
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26 * @test
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27 * @bug 6478991
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28 * @summary C1 NullCheckEliminator yields incorrect exceptions
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29 *
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30 * @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest
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31 */
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32
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33 public class NullCheckTest {
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34 static class A {
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35 int f;
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36
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37 public final void inlined(A a) {
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38 // This cast is intended to fail.
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39 B b = ((B) a);
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40 }
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41 }
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42
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43 static class B extends A {
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44 }
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45
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46
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47 private static void test(A a1, A a2) {
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48 // Inlined call must do a null check on a1.
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49 // However, the exlipcit NullCheck instruction is eliminated and
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50 // the null check is folded into the field load below, so the
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51 // exception in the inlined method is thrown before the null check
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52 // and the NullPointerException is not thrown.
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53 a1.inlined(a2);
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54
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55 int x = a1.f;
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56 }
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57
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58 public static void main(String[] args) {
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59 // load classes
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60 new B();
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61 try {
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62 test(null, new A());
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63
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64 throw new InternalError("FAILURE: no exception");
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65 } catch (NullPointerException ex) {
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66 System.out.println("CORRECT: NullPointerException");
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67 } catch (ClassCastException ex) {
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68 System.out.println("FAILURE: ClassCastException");
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69 throw ex;
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70 }
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71 }
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72 }