nuttx-apps/testing/ostest/suspend.c

143 lines
4.2 KiB
C

/****************************************************************************
* apps/testing/ostest/suspend.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
****************************************************************************/
#include <sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <semaphore.h>
#include <signal.h>
#include <sched.h>
#include <errno.h>
#include "ostest.h"
/****************************************************************************
* Private Functions
****************************************************************************/
static int victim_main(int argc, char *argv[])
{
printf("victim_main: Victim started\n" );
for (; ; )
{
sleep(3);
printf("victim_main: Wasting time\n" );
FFLUSH();
}
return 0; /* Won't get here */
}
/****************************************************************************
* Public Functions
****************************************************************************/
void suspend_test(void)
{
struct sched_param param;
pid_t victim;
int ret;
/* Start victim thread */
printf("suspend_test: Starting victim task\n" );
ret = sched_getparam (0, &param);
if (ret < 0)
{
printf("suspend_test: ERROR sched_getparam() failed\n" );
param.sched_priority = PTHREAD_DEFAULT_PRIORITY;
}
victim = task_create("victim", param.sched_priority,
STACKSIZE, victim_main, NULL);
if (victim == ERROR)
{
printf("suspend_test: ERROR failed to start victim_main\n" );
}
else
{
printf("suspend_test: Started victim_main pid=%d\n", victim);
}
/* Wait a bit */
printf("suspend_test: Is the victim saying anything?\n")
FFLUSH();
sleep(10);
/* Then signal the victim thread. */
printf("suspend_test: Signaling pid=%d with SIGSTOP\n", victim);
ret = kill(victim, SIGSTOP);
if (ret < 0)
{
printf("suspend_test: ERROR kill() failed\n" );
}
printf("suspend_test: Is the victim still jabbering?\n")
FFLUSH();
sleep(10);
printf("suspend_test: Signaling pid=%d with SIGCONT\n", victim);
ret = kill(victim, SIGCONT);
if (ret < 0)
{
printf("suspend_test: ERROR kill() failed\n" );
}
printf("suspend_test: The victim should continue the rant.\n")
FFLUSH();
sleep(10);
printf("suspend_test: Signaling pid=%d with SIGKILL\n", victim);
ret = kill(victim, SIGKILL);
if (ret < 0)
{
printf("suspend_test: ERROR kill() failed\n" );
}
FFLUSH();
sleep(1);
ret = kill(victim, 0);
if (ret >= 0)
{
printf("suspend_test: ERROR kill() on the dead victim succeeded!\n" );
}
printf("suspend_test: done\n" );
FFLUSH();
}