1/* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2022-2023 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 <pthread.h> 19#include <unistd.h> 20#include <sys/syscall.h> 21 22#define NUM_THREADS 32 23 24pthread_barrier_t barrier; 25 26static void 27do_exit (int exitcode) 28{ 29 /* Synchronize all threads up to here so that they all exit at 30 roughly the same time. */ 31 pthread_barrier_wait (&barrier); 32 33 /* All threads exit with SYS_exit, even the main thread, to avoid 34 exiting with a group-exit syscall, as that syscall changes the 35 exit status of all still-alive threads, thus potentially masking 36 a bug. */ 37 syscall (SYS_exit, exitcode); 38} 39 40static void * 41start (void *arg) 42{ 43 int thread_return_value = *(int *) arg; 44 45 do_exit (thread_return_value); 46} 47 48int 49main(void) 50{ 51 pthread_t threads[NUM_THREADS]; 52 int thread_return_val[NUM_THREADS]; 53 int i; 54 55 pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1); 56 57 for (i = 0; i < NUM_THREADS; ++i) 58 { 59 thread_return_val[i] = i + 2; 60 pthread_create (&threads[i], NULL, start, &thread_return_val[i]); 61 } 62 63 do_exit (1); 64} 65