| /* 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #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" |