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144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/* Copyright (C) 2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* This test checks that TLS in a dlopened object works when first accessed
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from a signal handler. */
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#include <assert.h>
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#include <atomic.h>
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#include <dlfcn.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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void *
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spin (void *ignored)
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{
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while (1)
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{
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/* busywork */
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free (malloc (128));
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}
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/* never reached */
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return NULL;
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}
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static void (*tls7mod_action) (int, siginfo_t *, void *);
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static void
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action (int signo, siginfo_t *info, void *ignored)
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{
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sem_t *sem = info->si_value.sival_ptr;
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atomic_read_barrier ();
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assert (tls7mod_action != NULL);
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(*tls7mod_action) (signo, info, ignored);
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/* This sem_post may trigger dlclose, which will invalidate tls7mod_action.
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It is important to do that only after tls7mod_action is no longer
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active. */
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sem_post (sem);
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}
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int
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do_test (void)
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{
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pthread_t th[10];
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for (int i = 0; i < 10; ++i)
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{
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if (pthread_create (&th[i], NULL, spin, NULL))
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{
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puts ("pthread_create failed");
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exit (1);
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}
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}
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#define NITERS 75
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for (int i = 0; i < NITERS; ++i)
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{
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void *h = dlopen ("tst-tls7mod.so", RTLD_LAZY);
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if (h == NULL)
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{
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puts ("dlopen failed");
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exit (1);
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}
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tls7mod_action = dlsym (h, "action");
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if (tls7mod_action == NULL)
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{
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puts ("dlsym for action failed");
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exit (1);
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}
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atomic_write_barrier ();
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struct sigaction sa;
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sa.sa_sigaction = action;
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sigemptyset (&sa.sa_mask);
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sa.sa_flags = SA_SIGINFO;
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if (sigaction (SIGUSR1, &sa, NULL))
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{
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puts ("sigaction failed");
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exit (1);
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}
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sem_t sem;
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if (sem_init (&sem, 0, 0))
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{
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puts ("sem_init failed");
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}
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sigval_t val;
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val.sival_ptr = &sem;
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for (int i = 0; i < 10; ++i)
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{
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if (pthread_sigqueue (th[i], SIGUSR1, val))
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{
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puts ("pthread_sigqueue failed");
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}
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}
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for (int i = 0; i < 10; ++i)
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{
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if (sem_wait (&sem))
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{
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puts ("sem_wait failed");
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}
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}
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/* Paranoia. */
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tls7mod_action = NULL;
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if (dlclose (h))
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{
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puts ("dlclose failed");
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exit (1);
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}
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}
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return 0;
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}
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#define TIMEOUT 4
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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