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/test03.

    28  * VM Testbase keywords: [jit, quick]

    29  *

    30  * @library /vmTestbase

    31  *          /test/lib

    32  * @run driver jdk.test.lib.FileInstaller . .

    33  * @build jit.deoptimization.test03.test03

    34  * @run driver ExecDriver --java jit.deoptimization.test03.test03

    35  */

    36 

    37 package jit.deoptimization.test03;

    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 test03 {

    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 - 1; index++) {

    74                         synchronized (extern_Lock) {

    75                                 foo(index);

    76                         }

    77                 }

    78         }

    79 

    80         Object extern_Lock = new Object();

    81 }

    82 

    83 class B extends A {

    84   public void foo(int index) {

    85     count--;

    86   }

    87 };