143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/****************************************************************************
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* apps/testing/ostest/suspend.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#include <sys/types.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <semaphore.h>
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#include <signal.h>
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#include <sched.h>
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#include <errno.h>
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#include "ostest.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int victim_main(int argc, char *argv[])
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{
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printf("victim_main: Victim started\n" );
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for (; ; )
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{
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sleep(3);
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printf("victim_main: Wasting time\n" );
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FFLUSH();
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}
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return 0; /* Won't get here */
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void suspend_test(void)
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{
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struct sched_param param;
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pid_t victim;
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int ret;
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/* Start victim thread */
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printf("suspend_test: Starting victim task\n" );
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ret = sched_getparam (0, ¶m);
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if (ret < 0)
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{
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printf("suspend_test: ERROR sched_getparam() failed\n" );
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param.sched_priority = PTHREAD_DEFAULT_PRIORITY;
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}
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victim = task_create("victim", param.sched_priority,
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STACKSIZE, victim_main, NULL);
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if (victim == ERROR)
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{
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printf("suspend_test: ERROR failed to start victim_main\n" );
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}
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else
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{
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printf("suspend_test: Started victim_main pid=%d\n", victim);
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}
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/* Wait a bit */
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printf("suspend_test: Is the victim saying anything?\n")
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FFLUSH();
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sleep(10);
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/* Then signal the victim thread. */
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printf("suspend_test: Signaling pid=%d with SIGSTOP\n", victim);
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ret = kill(victim, SIGSTOP);
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if (ret < 0)
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{
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printf("suspend_test: ERROR kill() failed\n" );
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}
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printf("suspend_test: Is the victim still jabbering?\n")
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FFLUSH();
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sleep(10);
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printf("suspend_test: Signaling pid=%d with SIGCONT\n", victim);
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ret = kill(victim, SIGCONT);
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if (ret < 0)
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{
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printf("suspend_test: ERROR kill() failed\n" );
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}
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printf("suspend_test: The victim should continue the rant.\n")
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FFLUSH();
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sleep(10);
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printf("suspend_test: Signaling pid=%d with SIGKILL\n", victim);
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ret = kill(victim, SIGKILL);
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if (ret < 0)
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{
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printf("suspend_test: ERROR kill() failed\n" );
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}
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FFLUSH();
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sleep(1);
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ret = kill(victim, 0);
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if (ret >= 0)
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{
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printf("suspend_test: ERROR kill() on the dead victim succeeded!\n" );
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}
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printf("suspend_test: done\n" );
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FFLUSH();
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}
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