1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2019-2020 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 <pthread.h> 20 #include <unistd.h> 21 22 /* A place to record the thread. */ 23 pthread_t the_thread; 24 25 /* The worker thread just spins forever. */ 26 void* 27 thread_worker (void *payload) 28 { 29 while (1) 30 { 31 sleep (1); 32 } 33 34 return NULL; 35 } 36 37 /* Create a worker thread. */ 38 int 39 spawn_thread () 40 { 41 if (pthread_create (&the_thread, NULL, thread_worker, NULL)) 42 { 43 fprintf (stderr, "Unable to create thread.\n"); 44 return 0; 45 } 46 return 1; 47 } 48 49 /* A place for GDB to place a breakpoint. */ 50 void __attribute__((used)) 51 breakpt () 52 { 53 /* Nothing. */ 54 } 55 56 /* Create a worker thread that just spins forever, then enter a loop 57 periodically calling the BREAKPT function. */ 58 int 59 main() 60 { 61 /* Ensure we stop if GDB crashes and DejaGNU fails to kill us. */ 62 alarm (10); 63 64 spawn_thread (); 65 66 while (1) 67 { 68 sleep (1); 69 70 breakpt (); 71 } 72 73 return 0; 74 } 75