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glibc/nptl/tst-signal3.c
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/* Copyright (C) 2002-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <pthread.h> | |
#include <semaphore.h> | |
#include <signal.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#ifdef SIGRTMIN | |
/* Number of different signals to use. Also is the number of threads. */ | |
# define N 10 | |
/* Maximum number of threads in flight at any one time. */ | |
# define INFLIGHT 5 | |
/* Number of signals sent in total. */ | |
# define ROUNDS 10000 | |
static int received[N][N]; | |
static int nsig[N]; | |
static pthread_t th[N]; | |
static sem_t sem; | |
static pthread_mutex_t lock[N]; | |
static pthread_t th_main; | |
static int sig0; | |
static void | |
handler (int sig) | |
{ | |
int i; | |
for (i = 0; i < N; ++i) | |
if (pthread_equal (pthread_self (), th[i])) | |
break; | |
if (i == N) | |
{ | |
if (pthread_equal (pthread_self (), th_main)) | |
puts ("signal received by main thread"); | |
else | |
printf ("signal received by unknown thread (%lx)\n", | |
(unsigned long int) pthread_self ()); | |
exit (1); | |
} | |
++received[i][sig - sig0]; | |
sem_post (&sem); | |
} | |
static void * | |
tf (void *arg) | |
{ | |
int idx = (long int) arg; | |
sigset_t ss; | |
sigemptyset (&ss); | |
int i; | |
for (i = 0; i <= idx; ++i) | |
sigaddset (&ss, sig0 + i); | |
if (pthread_sigmask (SIG_UNBLOCK, &ss, NULL) != 0) | |
{ | |
printf ("thread %d: pthread_sigmask failed\n", i); | |
exit (1); | |
} | |
pthread_mutex_lock (&lock[idx]); | |
return NULL; | |
} | |
static int | |
do_test (void) | |
{ | |
/* Block all signals. */ | |
sigset_t ss; | |
sigfillset (&ss); | |
th_main = pthread_self (); | |
sig0 = SIGRTMIN; | |
if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0) | |
{ | |
puts ("1st pthread_sigmask failed"); | |
exit (1); | |
} | |
/* Install the handler. */ | |
int i; | |
for (i = 0; i < N; ++i) | |
{ | |
struct sigaction sa = | |
{ | |
.sa_handler = handler, | |
.sa_flags = 0 | |
}; | |
sigfillset (&sa.sa_mask); | |
if (sigaction (sig0 + i, &sa, NULL) != 0) | |
{ | |
printf ("sigaction for signal %d failed\n", i); | |
exit (1); | |
} | |
} | |
if (sem_init (&sem, 0, INFLIGHT) != 0) | |
{ | |
puts ("sem_init failed"); | |
exit (1); | |
} | |
pthread_attr_t a; | |
if (pthread_attr_init (&a) != 0) | |
{ | |
puts ("attr_init failed"); | |
exit (1); | |
} | |
if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0) | |
{ | |
puts ("attr_setstacksize failed"); | |
return 1; | |
} | |
for (i = 0; i < N; ++i) | |
{ | |
if (pthread_mutex_init (&lock[i], NULL) != 0) | |
{ | |
printf ("mutex_init[%d] failed\n", i); | |
} | |
if (pthread_mutex_lock (&lock[i]) != 0) | |
{ | |
printf ("mutex_lock[%d] failed\n", i); | |
} | |
if (pthread_create (&th[i], &a, tf, (void *) (long int) i) != 0) | |
{ | |
printf ("create of thread %d failed\n", i); | |
exit (1); | |
} | |
} | |
if (pthread_attr_destroy (&a) != 0) | |
{ | |
puts ("attr_destroy failed"); | |
exit (1); | |
} | |
int result = 0; | |
unsigned int r = 42; | |
pid_t pid = getpid (); | |
for (i = 0; i < ROUNDS; ++i) | |
{ | |
if (TEMP_FAILURE_RETRY (sem_wait (&sem)) != 0) | |
{ | |
printf ("sem_wait round %d failed: %m\n", i); | |
exit (1); | |
} | |
int s = rand_r (&r) % N; | |
kill (pid, sig0 + s); | |
} | |
void *status; | |
for (i = 0; i < N; ++i) | |
{ | |
if (pthread_mutex_unlock (&lock[i]) != 0) | |
{ | |
printf ("unlock %d failed\n", i); | |
exit (1); | |
} | |
if (pthread_join (th[i], &status) != 0) | |
{ | |
printf ("join %d failed\n", i); | |
result = 1; | |
} | |
else if (status != NULL) | |
{ | |
printf ("%d: result != NULL\n", i); | |
result = 1; | |
} | |
} | |
int total = 0; | |
for (i = 0; i < N; ++i) | |
{ | |
int j; | |
for (j = 0; j <= i; ++j) | |
total += received[i][j]; | |
for (j = i + 1; j < N; ++j) | |
if (received[i][j] != 0) | |
{ | |
printf ("thread %d received signal SIGRTMIN+%d\n", i, j); | |
result = 1; | |
} | |
} | |
if (total != ROUNDS) | |
{ | |
printf ("total number of handled signals is %d, expected %d\n", | |
total, ROUNDS); | |
result = 1; | |
} | |
printf ("A total of %d signals sent and received\n", total); | |
for (i = 0; i < N; ++i) | |
{ | |
printf ("thread %2d:", i); | |
int j; | |
for (j = 0; j <= i; ++j) | |
{ | |
printf (" %5d", received[i][j]); | |
nsig[j] += received[i][j]; | |
} | |
putchar ('\n'); | |
} | |
printf ("\nTotal :"); | |
for (i = 0; i < N; ++i) | |
printf (" %5d", nsig[i]); | |
putchar ('\n'); | |
return result; | |
} | |
# define TIMEOUT 10 | |
# define TEST_FUNCTION do_test () | |
#else | |
# define TEST_FUNCTION 0 | |
#endif | |
#include "../test-skeleton.c" |