| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2009-2016 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/>. |
| |
| Check that watchpoints get propagated to all existing threads when the |
| watchpoint is created. |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <pthread.h> |
| |
| #ifndef NR_THREADS |
| #define NR_THREADS 4 |
| #endif |
| |
| #ifndef X_INCR_COUNT |
| #define X_INCR_COUNT 10 |
| #endif |
| |
| void *thread_function (void *arg); /* Function executed by each thread. */ |
| |
| pthread_mutex_t x_mutex; |
| int x; |
| |
| /* Used to hold threads back until watchthreads2.exp is ready. */ |
| int test_ready = 0; |
| |
| int |
| main () |
| { |
| int res; |
| pthread_t threads[NR_THREADS]; |
| int i; |
| |
| pthread_mutex_init (&x_mutex, NULL); |
| |
| for (i = 0; i < NR_THREADS; ++i) |
| { |
| res = pthread_create (&threads[i], |
| NULL, |
| thread_function, |
| (void *) (intptr_t) i); |
| if (res != 0) |
| { |
| fprintf (stderr, "error in thread %d create\n", i); |
| abort (); |
| } |
| } |
| |
| for (i = 0; i < NR_THREADS; ++i) |
| { |
| res = pthread_join (threads[i], NULL); |
| if (res != 0) |
| { |
| fprintf (stderr, "error in thread %d join\n", i); |
| abort (); |
| } |
| } |
| |
| exit (EXIT_SUCCESS); |
| } |
| |
| /* Easy place for a breakpoint. |
| watchthreads2.exp uses this to track when all threads are running |
| instead of, for example, the program keeping track |
| because we don't need the program to know when all threads are running, |
| instead we need gdb to know when all threads are running. |
| There is a delay between when a thread has started and when the thread |
| has been registered with gdb. */ |
| |
| void |
| thread_started () |
| { |
| } |
| |
| void * |
| thread_function (void *arg) |
| { |
| int i; |
| |
| thread_started (); |
| |
| /* Don't start incrementing X until watchthreads2.exp is ready. */ |
| while (! test_ready) |
| usleep (1); |
| |
| for (i = 0; i < X_INCR_COUNT; ++i) |
| { |
| pthread_mutex_lock (&x_mutex); |
| /* For debugging. */ |
| printf ("Thread %ld changing x %d -> %d\n", (long) arg, x, x + 1); |
| /* The call to usleep is so that when the watchpoint triggers, |
| the pc is still on the same line. */ |
| ++x; usleep (1); /* X increment. */ |
| pthread_mutex_unlock (&x_mutex); |
| } |
| |
| pthread_exit (NULL); |
| } |