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 public class InlinedArrayCloneTestCase implements Runnable {
  25     private Test_ia32 executionController;
  26 
  27     public InlinedArrayCloneTestCase(Test_ia32 executionController) {
  28         this.executionController = executionController;
  29     }
  30 
  31     /*
  32      * Please leave following two methods (invokeArrayClone and verifyArguments)
  33      * static.
  34      *
  35      * It does not really matter if these methods are static or instance,
  36      * original issue could be reproduced in both cases, but if these methods
  37      * are static then it is much easier to understand that reproduced issue
  38      * is actually interpreter's stack corruption.
  39      *
  40      * If these methods are non-static, then interpreter's stack will contain
  41      * invalid 'this' pointer required for instance's method call and
  42      * verifyArguments' call may throw NullPointerException. There was another
  43      * issue w/ NPE after deoptimization addressed by JDK-6833129, so NPE looks
  44      * a little bit confusing.
  45      *
  46      * If these methods are static then after deptimization we'll get incorrect
  47      * arguments values in verifyArguments.
  48      * Something like "2, -1289936896, 3, 4" instead of "1, 2, 3, 4".
  49      * This information tells much more about actual issue comparing to NPE,
  50      * so it's preferable to leave these methods static.
  51      */
  52     private static int verifyArguments(int i1, int i2, LoadedClass[] arr,
  53             int i3, int i4) {
  54         if (!(i1==1 && i2==2 && i3==3 && i4==4)) {
  55             throw new RuntimeException(String.format(
  56                     "Arguments have unexpected values: %d, %d, %d, %d",
  57                     i1, i2, i3, i4));
  58         }
  59         return arr.length;
  60     }
  61 
  62     private static int invokeArrayClone(LoadedClass[] a) {
  63         return InlinedArrayCloneTestCase.verifyArguments(1, 2, a.clone(), 3, 4);
  64     }
  65 
  66     @Override
  67     public void run() {
  68         LoadedClass[] array = executionController.getArray();
  69         int length;
  70 
  71         while (executionController.continueExecution()) {
  72             try {
  73                 length = InlinedArrayCloneTestCase.invokeArrayClone(array);
  74             } catch (Throwable e) {
  75                 e.printStackTrace();
  76                 executionController.setTestFailed();
  77                 return;
  78             }
  79             if (length != array.length) {
  80                 System.out.println(String.format("f(array) returned %d "
  81                         + "instead of %d.", length, array.length));
  82                 executionController.setTestFailed();
  83             }
  84         }
  85     }
  86 }