| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2002-2013 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| This file is copied from schedlock.c. */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <pthread.h> |
| |
| void *thread_function (void *arg); /* Function executed by each thread. */ |
| |
| #define NUM 5 |
| |
| unsigned int args[NUM+1]; |
| |
| int |
| main () |
| { |
| int res; |
| pthread_t threads[NUM]; |
| void *thread_result; |
| long i; |
| |
| /* To keep the test determinative, initialize args first, |
| then start all the threads. Otherwise, the way watchthreads.exp |
| is written, we have to worry about things like threads[0] getting |
| to 29 hits of args[0] before args[1] gets changed. */ |
| |
| for (i = 0; i < NUM; i++) |
| { |
| /* The call to usleep is so that when the watchpoint triggers, |
| the pc is still on the same line. */ |
| args[i] = 1; usleep (1); /* Init value. */ |
| } |
| |
| for (i = 0; i < NUM; i++) |
| { |
| res = pthread_create (&threads[i], |
| NULL, |
| thread_function, |
| (void *) i); |
| } |
| |
| args[i] = 1; |
| thread_function ((void *) i); |
| |
| exit (EXIT_SUCCESS); |
| } |
| |
| void * |
| thread_function (void *arg) |
| { |
| int my_number = (long) arg; |
| int *myp = (int *) &args[my_number]; |
| |
| /* Don't run forever. Run just short of it :) */ |
| while (*myp > 0) |
| { |
| (*myp) ++; usleep (1); /* Loop increment. */ |
| } |
| |
| pthread_exit (NULL); |
| } |
| |