/* Copyright (C) 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. 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 <pthread.h> #include <signal.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #define N 2 static pthread_barrier_t bar; static struct { void *p; pthread_t s; } ti[N]; static int sig1; static void handler (int sig) { pthread_t self = pthread_self (); size_t i; for (i = 0; i < N; ++i) if (ti[i].s == self) { if ((uintptr_t) ti[i].p <= (uintptr_t) &self && (uintptr_t) ti[i].p + 2 * MINSIGSTKSZ > (uintptr_t) &self) { puts ("alt stack not used"); exit (1); } printf ("thread %zu used alt stack for signal %d\n", i, sig); return; } puts ("handler: thread not found"); exit (1); } static void * tf (void *arg) { size_t nr = (uintptr_t) arg; if (nr >= N) { puts ("wrong nr parameter"); exit (1); } sigset_t ss; sigemptyset (&ss); size_t i; for (i = 0; i < N; ++i) if (i != nr) if (sigaddset (&ss, sig1 + i) != 0) { puts ("tf: sigaddset failed"); exit (1); } if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0) { puts ("tf: sigmask failed"); exit (1); } void *p = malloc (2 * MINSIGSTKSZ); if (p == NULL) { puts ("tf: malloc failed"); exit (1); } stack_t s; s.ss_sp = p; s.ss_size = 2 * MINSIGSTKSZ; s.ss_flags = 0; if (sigaltstack (&s, NULL) != 0) { puts ("tf: sigaltstack failed"); exit (1); } ti[nr].p = p; ti[nr].s = pthread_self (); pthread_barrier_wait (&bar); pthread_barrier_wait (&bar); return NULL; } static int do_test (void) { sig1 = SIGRTMIN; if (sig1 + N > SIGRTMAX) { puts ("too few RT signals"); return 0; } struct sigaction sa; sa.sa_handler = handler; sa.sa_flags = 0; sigemptyset (&sa.sa_mask); if (sigaction (sig1, &sa, NULL) != 0 || sigaction (sig1 + 1, &sa, NULL) != 0 || sigaction (sig1 + 2, &sa, NULL) != 0) { puts ("sigaction failed"); return 1; } if (pthread_barrier_init (&bar, NULL, 1 + N) != 0) { puts ("barrier_init failed"); return 1; } pthread_t th[N]; size_t i; for (i = 0; i < N; ++i) if (pthread_create (&th[i], NULL, tf, (void *) (long int) i) != 0) { puts ("create failed"); return 1; } /* Block the three signals. */ sigset_t ss; sigemptyset (&ss); for (i = 0; i <= N; ++i) sigaddset (&ss, sig1 + i); if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0) { puts ("main: sigmask failed"); return 1; } pthread_barrier_wait (&bar); /* Send some signals. */ pid_t me = getpid (); kill (me, sig1 + N); for (i = 0; i < N; ++i) kill (me, sig1 + i); kill (me, sig1 + N); /* Give the signals a chance to be worked on. */ sleep (1); pthread_barrier_wait (&bar); for (i = 0; i < N; ++i) if (pthread_join (th[i], NULL) != 0) { puts ("join failed"); return 1; } return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"