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/*
* Copyright (c) 2004, Bull S.A.. All rights reserved.
* Created by: Sebastien Decugis
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* This stress test aims to test the following assertion:
* The init_routine from pthread_once never execute
* more or less than once.
* The steps are:
* -> Create several threads
* -> All threads call pthread_once at the same time
* -> Check the init_routine executed once.
*/
/********************************************************************************************/
/****************************** standard includes *****************************************/
/********************************************************************************************/
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
/********************************************************************************************/
/****************************** Test framework *****************************************/
/********************************************************************************************/
#include "testfrmw.h"
#include "testfrmw.c"
/* This header is responsible for defining the following macros:
* UNRESOLVED(ret, descr);
* where descr is a description of the error and ret is an int (error code for example)
* FAILED(descr);
* where descr is a short text saying why the test has failed.
* PASSED();
* No parameter.
*
* Both three macros shall terminate the calling process.
* The testcase shall not terminate in any other maneer.
*
* The other file defines the functions
* void output_init()
* void output(char * string, ...)
*
* Those may be used to output information.
*/
/********************************************************************************************/
/********************************** Configuration ******************************************/
/********************************************************************************************/
#ifndef VERBOSE
#define VERBOSE 1
#endif
#define NTHREADS 30
/********************************************************************************************/
/*********************************** Test cases *****************************************/
/********************************************************************************************/
char do_it = 1;
long long iterations = 0;
/* Handler for user request to terminate */
void sighdl(int sig)
{
do {
do_it = 0;
}
while (do_it);
}
pthread_once_t once_ctl;
int once_chk;
pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
void init_routine(void)
{
int ret = 0;
ret = pthread_mutex_lock(&mtx);
if (ret != 0) {
UNRESOLVED(ret, "Failed to lock mutex in initializer");
}
once_chk++;
ret = pthread_mutex_unlock(&mtx);
if (ret != 0) {
UNRESOLVED(ret, "Failed to unlock mutex in initializer");
}
return;
}
/* Thread function */
void *threaded(void *arg)
{
int ret = 0;
/* Wait for all threads being created */
ret = pthread_barrier_wait(arg);
if ((ret != 0) && (ret != PTHREAD_BARRIER_SERIAL_THREAD)) {
UNRESOLVED(ret, "Barrier wait failed");
}
/* Call init routine */
ret = pthread_once(&once_ctl, init_routine);
if (ret != 0) {
UNRESOLVED(ret, "pthread_once failed");
}
return NULL;
}
/* Main function */
int main(int argc, char *argv[])
{
int ret = 0, i;
struct sigaction sa;
pthread_barrier_t bar;
pthread_t th[NTHREADS];
/* Initialize output routine */
output_init();
/* Initialize barrier */
ret = pthread_barrier_init(&bar, NULL, NTHREADS);
if (ret != 0) {
UNRESOLVED(ret, "Failed to init barrier");
}
/* Register the signal handler for SIGUSR1 */
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = sighdl;
if ((ret = sigaction(SIGUSR1, &sa, NULL))) {
UNRESOLVED(ret, "Unable to register signal handler");
}
if ((ret = sigaction(SIGALRM, &sa, NULL))) {
UNRESOLVED(ret, "Unable to register signal handler");
}
#if VERBOSE > 1
output("[parent] Signal handler registered\n");
#endif
while (do_it) {
/* Reinitialize once handler & check value */
once_ctl = PTHREAD_ONCE_INIT;
once_chk = 0;
/* create the threads */
for (i = 0; i < NTHREADS; i++) {
ret = pthread_create(&th[i], NULL, threaded, &bar);
if (ret != 0) {
UNRESOLVED(ret, "Failed to create a thread");
}
}
/* Then join */
for (i = 0; i < NTHREADS; i++) {
ret = pthread_join(th[i], NULL);
if (ret != 0) {
UNRESOLVED(ret, "Failed to join a thread");
}
}
/* check the value */
ret = pthread_mutex_lock(&mtx);
if (ret != 0) {
UNRESOLVED(ret, "Failed to lock mutex in initializer");
}
if (once_chk != 1) {
output("Control: %d\n", once_chk);
FAILED("The initializer function did not execute once");
}
ret = pthread_mutex_unlock(&mtx);
if (ret != 0) {
UNRESOLVED(ret,
"Failed to unlock mutex in initializer");
}
iterations++;
}
/* We've been asked to stop */
output("pthread_once stress test PASSED -- %llu iterations\n",
iterations);
ret = pthread_barrier_destroy(&bar);
if (ret != 0) {
UNRESOLVED(ret, "Failed to destroy the barrier");
}
PASSED;
}
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