1 /*

     2  * Copyright (c) 2017, 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  * @summary Test user threads with various stack sizes.

    27  * @run main/othervm TestThreadStackSizes

    28  */

    29 

    30 public class TestThreadStackSizes extends Thread {

    31     static final int K = 1024;

    32 

    33     public TestThreadStackSizes(long stackSize) {

    34         super(null, null, "TestThreadStackSizes" + stackSize, stackSize);

    35     }

    36 

    37     @Override

    38     public void run() {

    39     }

    40 

    41     public static void createThread(long stackSize) {

    42         System.out.println("StackSize: " + stackSize);

    43         try {

    44             TestThreadStackSizes testThreadStackSize = new TestThreadStackSizes(stackSize);

    45             testThreadStackSize.start();

    46             try {

    47                 testThreadStackSize.join();

    48             } catch (InterruptedException e) {

    49                 throw new Error("InterruptedException in main thread", e);

    50             }

    51         } catch (Error e) {  // we sometimes get OutOfMemoryError for very large stacks

    52             System.out.println("Got exception for stack size " + stackSize  + ": " + e);

    53         }

    54     }

    55 

    56     public static void main(String[] args) throws Error {

    57         // Try every stack size from 0k to 320k.

    58         for (int i = 0; i <= 320; i++) {

    59             createThread(i * K);

    60         }

    61         // Try a few other potentially problematic stack sizes.

    62         createThread(500*K);

    63         createThread(501*K);

    64         createThread(-1);

    65         createThread(500*K*K);

    66         createThread(9223372036854774784L);

    67     }

    68 }