libtests/stackchk/blow.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*  task1.c
0004  *
0005  *  This set of three tasks do some simple task switching for about
0006  *  15 seconds and then call a routine to "blow the stack".
0007  *
0008  *  COPYRIGHT (c) 1989-2012.
0009  *  On-Line Applications Research Corporation (OAR).
0010  *
0011  * Redistribution and use in source and binary forms, with or without
0012  * modification, are permitted provided that the following conditions
0013  * are met:
0014  * 1. Redistributions of source code must retain the above copyright
0015  *    notice, this list of conditions and the following disclaimer.
0016  * 2. Redistributions in binary form must reproduce the above copyright
0017  *    notice, this list of conditions and the following disclaimer in the
0018  *    documentation and/or other materials provided with the distribution.
0019  *
0020  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0021  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0022  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0023  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0024  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0025  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0026  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0027  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0028  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0029  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0030  * POSSIBILITY OF SUCH DAMAGE.
0031  */
0032
0033 #ifdef HAVE_CONFIG_H
0034 #include "config.h"
0035 #endif
0036
0037 #include <rtems/stackchk.h>
0038
0039 #include "system.h"
0040
0041 void blow_stack(void)
0042 {
0043   Thread_Control *executing;
0044   char *area;
0045   volatile uintptr_t *low;
0046   volatile uintptr_t *high;
0047
0048   executing = _Thread_Get_executing();
0049
0050   /*
0051    *  Destroy the first and last 4 words of our stack area... Hope it
0052    *  does not cause problems :)
0053    */
0054
0055   area = (char *) executing->Start.Initial_stack.area;
0056   low  = (uintptr_t *) area;
0057   high = (uintptr_t *)
0058     (area + executing->Start.Initial_stack.size - 4 * sizeof(*high));
0059
0060   low[0] = 0x11111111;
0061   low[1] = 0x22222222;
0062   low[2] = 0x33333333;
0063   low[3] = 0x44444444;
0064
0065   high[0] = 0x55555555;
0066   high[1] = 0x66666666;
0067   high[2] = 0x77777777;
0068   high[3] = 0x88888888;
0069
0070   rtems_stack_checker_report_usage();
0071 }