/* Copyright (C) 2003-2018 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 <errno.h> #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <time.h> #include <unistd.h> static void wait_code (void) { struct timespec ts = { .tv_sec = 0, .tv_nsec = 200000000 }; while (nanosleep (&ts, &ts) < 0) ; } #ifdef WAIT_IN_CHILD static pthread_barrier_t b; #endif static void * tf1 (void *arg) { #ifdef WAIT_IN_CHILD int e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); exit (1); } wait_code (); #endif pthread_join ((pthread_t) arg, NULL); exit (42); } static void * tf2 (void *arg) { #ifdef WAIT_IN_CHILD int e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); exit (1); } wait_code (); #endif pthread_join ((pthread_t) arg, NULL); exit (43); } static int do_test (void) { #ifdef WAIT_IN_CHILD if (pthread_barrier_init (&b, NULL, 2) != 0) { puts ("barrier_init failed"); return 1; } #endif pthread_t th; int err = pthread_join (pthread_self (), NULL); if (err == 0) { puts ("1st circular join succeeded"); return 1; } if (err != EDEADLK) { printf ("1st circular join %d, not EDEADLK\n", err); return 1; } if (pthread_create (&th, NULL, tf1, (void *) pthread_self ()) != 0) { puts ("1st create failed"); return 1; } #ifndef WAIT_IN_CHILD wait_code (); #endif if (pthread_cancel (th) != 0) { puts ("cannot cancel 1st thread"); return 1; } #ifdef WAIT_IN_CHILD int e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); return 1; } #endif void *r; err = pthread_join (th, &r); if (err != 0) { printf ("cannot join 1st thread: %d\n", err); return 1; } if (r != PTHREAD_CANCELED) { puts ("1st thread not canceled"); return 1; } err = pthread_join (pthread_self (), NULL); if (err == 0) { puts ("2nd circular join succeeded"); return 1; } if (err != EDEADLK) { printf ("2nd circular join %d, not EDEADLK\n", err); return 1; } if (pthread_create (&th, NULL, tf2, (void *) pthread_self ()) != 0) { puts ("2nd create failed"); return 1; } #ifndef WAIT_IN_CHILD wait_code (); #endif if (pthread_cancel (th) != 0) { puts ("cannot cancel 2nd thread"); return 1; } #ifdef WAIT_IN_CHILD e = pthread_barrier_wait (&b); if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) { printf ("%s: barrier_wait failed\n", __func__); return 1; } #endif if (pthread_join (th, &r) != 0) { puts ("cannot join 2nd thread"); return 1; } if (r != PTHREAD_CANCELED) { puts ("2nd thread not canceled"); return 1; } err = pthread_join (pthread_self (), NULL); if (err == 0) { puts ("3rd circular join succeeded"); return 1; } if (err != EDEADLK) { printf ("3rd circular join %d, not EDEADLK\n", err); return 1; } return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"