1 /*
   2  * Copyright (c) 2008, 2018, 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  *
  27  * @summary converted from VM Testbase jit/deoptimization/test02.
  28  * VM Testbase keywords: [jit, quick]
  29  *
  30  * @library /vmTestbase
  31  *          /test/lib
  32  * @run driver jdk.test.lib.FileInstaller . .
  33  * @build jit.deoptimization.test02.test02
  34  * @run driver ExecDriver --java jit.deoptimization.test02.test02
  35  */
  36 
  37 package jit.deoptimization.test02;
  38 
  39 import nsk.share.TestFailure;
  40 
  41 /*
  42  *      Simple loop causes the optimizer to deoptimize
  43  *      foo methos when an instance of class B is created.
  44  *
  45  *      run with the -XX:TraceDeoptimization to observ the result.
  46  */
  47 
  48 class test02 {
  49   public static void main (String[] args) {
  50     A obj = new A();
  51     for (int index = 0; index < 100; index++) {
  52       obj.used_alot();
  53     }
  54   }
  55 }
  56 
  57 class A {
  58         protected final int counter = 25000;
  59         protected int count = 0;
  60         public void foo(int index) {
  61                 count++;
  62 
  63                 if (index == counter - 1) {
  64                         try {
  65                                 ((B)Class.forName("B").newInstance()).foo(index);
  66                         }
  67                         catch(Exception e) {
  68                         }
  69                 }
  70         }
  71 
  72         public synchronized void used_alot() {
  73                 for (int index = 0; index < counter; index++) {
  74                         foo(index);
  75                 }
  76         }
  77 }
  78 
  79 class B extends A {
  80   public void foo(int index) {
  81     count--;
  82   }
  83 };