1 /*

     2  * Copyright (c) 2009, 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 /**

    26  * @test

    27  * @bug 6885584

    28  * @summary A particular class structure causes large allocation spike for jit

    29  *

    30  * @run main/othervm -Xbatch compiler.c2.Test6885584

    31  */

    32 

    33 package compiler.c2;

    34 

    35 public class Test6885584 {

    36    static private int i1;

    37    static private int i2;

    38    static private int i3;

    39 

    40     static int limit = Integer.MAX_VALUE - 8;

    41 

    42    public static void main(String args[]) {

    43        // Run long enough to trigger an OSR

    44        for(int j = 200000; j != 0; j--) {

    45        }

    46 

    47        // This must reference a field

    48        i1 = i2;

    49 

    50        // The resource leak is roughly proportional to this initial value

    51        for(int k = Integer.MAX_VALUE - 1; k != 0; k--) {

    52            // Make sure the body does some work

    53            if(i2 > i3)i1 = k;

    54            if (k <= limit) break;

    55        }

    56    }

    57 

    58 }