1 /*
   2  * Copyright (c) 2002-2013, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2011 SAP AG.  All Rights Reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 class TestMT {
  26 
  27     static boolean loadLib(String libName) {
  28         try {
  29             System.loadLibrary(libName);
  30             System.out.println("Loaded library "+ libName + ".");
  31             return true;
  32         } catch (SecurityException e) {
  33             System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n");
  34         } catch (UnsatisfiedLinkError e) {
  35             System.out.println("loadLibrary(\"" + libName + "\") throws: " + e + "\n");
  36         }
  37         return false;
  38     }
  39 
  40     public static int counter        = 1;
  41     static int Runner() {
  42         counter = counter * -1;
  43         int i = counter;
  44         if (counter < 2) counter += Runner();
  45         return i;
  46     }
  47 
  48     public static int run(String msg) {
  49         try {
  50             Runner();
  51         } catch (StackOverflowError e) {
  52             System.out.println(msg + " caught stack overflow error.");
  53             return 0;
  54         } catch (OutOfMemoryError e) {
  55             return 0;
  56         }
  57         return 2;
  58     }
  59 
  60     public static void main(String argv[]) {
  61         try {
  62             for (int i = 0; i < 20; i++) {
  63                 Thread t = new DoStackOverflow("SpawnedThread " + i);
  64                 t.start();
  65             }
  66             run("Main thread");
  67             loadLib("test-rwx");
  68             run("Main thread");
  69         } catch (Exception e) {
  70             System.out.println(e);
  71         }
  72     }
  73 
  74     static class DoStackOverflow extends Thread {
  75         public DoStackOverflow(String name) {
  76             super(name);
  77         }
  78         public void run() {
  79             for (int i = 0; i < 10; ++i) {
  80                 TestMT.run(getName());
  81                 yield();
  82             }
  83         }
  84     }
  85 }