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annotate test/compiler/jsr292/LongReferenceCastingTest.java @ 24024:649f01d13b2d

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8156836: SIGSEGV: Test test/compiler/jsr292/VMAnonymousClasses.java fails with JTREG 4.2 b02 Summary: Need to specify /othervm in annotation section if jvm command line option -Xbatch is specified. Reviewed-by: kvn
author shshahma
date Mon, 27 Jun 2016 11:27:57 +0000
parents 55c8792fe214
children
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1 /*
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2 * Copyright (c) 2016, 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 import java.lang.invoke.*;
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26
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27 /**
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28 * @test
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29 * @bug 8148752
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30 * @summary Test correct casting of MH arguments during inlining.
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31 * @run main LongReferenceCastingTest
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32 */
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33 public class LongReferenceCastingTest {
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34 static final String MY_STRING = "myString";
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35 static final MethodHandle MH;
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36
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37 static {
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38 try {
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39 MethodHandles.Lookup lookup = MethodHandles.lookup();
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40 MethodType mt = MethodType.methodType(String.class, long.class, Object.class, String.class);
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41 MH = lookup.findVirtual(LongReferenceCastingTest.class, "myMethod", mt);
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42 } catch (Exception e) {
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43 throw new Error(e);
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44 }
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45 }
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46
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47 public String myMethod(long l, Object o, String s) {
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48 // The long argument occupies two stack slots, causing C2 to treat it as
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49 // two arguments and casting the fist one two long and the second one to Object.
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50 // As a result, Object o is casted to String and the o.toString() call is
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51 // inlined as String::toString(). We fail at runtime because 'o' is not a String.
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52 return o.toString();
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53 }
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54
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55 public String toString() {
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56 return MY_STRING;
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57 }
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58
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59 public static void main(String[] args) throws Exception {
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60 LongReferenceCastingTest test = new LongReferenceCastingTest();
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61 try {
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62 for (int i = 0; i < 20_000; ++i) {
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63 if (!test.invoke().equals(MY_STRING)) {
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64 throw new RuntimeException("Invalid string");
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65 }
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66 }
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67 } catch (Throwable t) {
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68 throw new RuntimeException("Test failed", t);
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69 }
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70 }
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71
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72 public String invoke() throws Throwable {
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73 return (String) MH.invokeExact(this, 0L, (Object)this, MY_STRING);
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74 }
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75 }