signal-command-multiple-signals-pending.c revision 1.4
1/* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2014-2016 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18#include <stdio.h> 19#include <unistd.h> 20#include <stdlib.h> 21#include <pthread.h> 22#include <signal.h> 23 24pthread_barrier_t barrier; 25sig_atomic_t got_sigusr1; 26sig_atomic_t got_sigusr2; 27 28void 29handler_sigusr1 (int sig) 30{ 31 got_sigusr1 = 1; 32} 33 34void 35handler_sigusr2 (int sig) 36{ 37 got_sigusr2 = 1; 38} 39 40void * 41thread_function (void *arg) 42{ 43 volatile unsigned int count = 1; 44 45 pthread_barrier_wait (&barrier); 46 47 while (count++ != 0) 48 { 49 if (got_sigusr1 && got_sigusr2) 50 break; 51 usleep (1); 52 } 53} 54 55void 56all_threads_started (void) 57{ 58} 59 60void 61all_threads_signalled (void) 62{ 63} 64 65void 66end (void) 67{ 68} 69 70int 71main (void) 72{ 73 pthread_t child_thread[2]; 74 int i; 75 76 signal (SIGUSR1, handler_sigusr1); 77 signal (SIGUSR2, handler_sigusr2); 78 79 for (i = 0; i < 2; i++) 80 { 81 pthread_barrier_init (&barrier, NULL, 2); 82 pthread_create (&child_thread[i], NULL, thread_function, NULL); 83 pthread_barrier_wait (&barrier); 84 pthread_barrier_destroy (&barrier); 85 } 86 87 all_threads_started (); 88 89 pthread_kill (child_thread[0], SIGUSR1); 90 pthread_kill (child_thread[1], SIGUSR2); 91 92 all_threads_signalled (); 93 94 for (i = 0; i < 2; i++) 95 pthread_join (child_thread[i], NULL); 96 97 end (); 98 return 0; 99} 100