nes-proj/examples/libs/stack-check/example-stack-check.c
2017-12-01 13:35:06 +00:00

89 lines
3.0 KiB
C

/*
* Copyright (c) 2017, University of Bristol - http://www.bris.ac.uk/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/**
* \file
* Test of Contiki system's stack checker functionality
* \author
* Atis Elsts <atis.elsts@bristol.ac.uk>
*/
#include "contiki.h"
#include "sys/stack-check.h"
#include "random.h"
#include <stdio.h>
#include <string.h>
#include <alloca.h>
/*---------------------------------------------------------------------------*/
PROCESS(example_process, "Stack check example");
AUTOSTART_PROCESSES(&example_process);
/*---------------------------------------------------------------------------*/
static void
nested_function(void)
{
printf("stack usage: %u permitted: %u\n",
stack_check_get_usage(), stack_check_get_reserved_size());
}
/*---------------------------------------------------------------------------*/
static void
test_function(void)
{
void *p;
uint16_t s;
/* allocate and fill some random bytes */
s = random_rand() % 1000;
printf("allocating %u bytes on the stack\n", s);
p = alloca(s);
memset(p, 0, s);
/* call the nested function to print stack usage */
nested_function();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(example_process, ev, data)
{
static struct etimer et;
PROCESS_BEGIN();
while(1) {
etimer_set(&et, CLOCK_SECOND * 2);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
test_function();
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/