115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2009, 2010 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Check that watchpoints get propagated to all existing threads when the
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watchpoint is created.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <pthread.h>
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#ifndef NR_THREADS
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#define NR_THREADS 4
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#endif
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#ifndef X_INCR_COUNT
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#define X_INCR_COUNT 10
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#endif
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void *thread_function (void *arg); /* Function executed by each thread. */
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pthread_mutex_t x_mutex;
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int x;
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/* Used to hold threads back until watchthreads2.exp is ready. */
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int test_ready = 0;
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int
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main ()
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{
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int res;
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pthread_t threads[NR_THREADS];
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int i;
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pthread_mutex_init (&x_mutex, NULL);
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for (i = 0; i < NR_THREADS; ++i)
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{
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res = pthread_create (&threads[i],
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NULL,
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thread_function,
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(void *) (intptr_t) i);
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if (res != 0)
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{
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fprintf (stderr, "error in thread %d create\n", i);
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abort ();
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}
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}
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for (i = 0; i < NR_THREADS; ++i)
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{
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res = pthread_join (threads[i], NULL);
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if (res != 0)
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{
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fprintf (stderr, "error in thread %d join\n", i);
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abort ();
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}
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}
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exit (EXIT_SUCCESS);
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}
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/* Easy place for a breakpoint.
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watchthreads2.exp uses this to track when all threads are running
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instead of, for example, the program keeping track
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because we don't need the program to know when all threads are running,
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instead we need gdb to know when all threads are running.
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There is a delay between when a thread has started and when the thread
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has been registered with gdb. */
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void
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thread_started ()
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{
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}
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void *
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thread_function (void *arg)
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{
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int i;
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thread_started ();
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/* Don't start incrementing X until watchthreads2.exp is ready. */
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while (! test_ready)
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usleep (1);
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for (i = 0; i < X_INCR_COUNT; ++i)
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{
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pthread_mutex_lock (&x_mutex);
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/* For debugging. */
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printf ("Thread %ld changing x %d -> %d\n", (long) arg, x, x + 1);
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/* The call to usleep is so that when the watchpoint triggers,
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the pc is still on the same line. */
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++x; usleep (1); /* X increment. */
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pthread_mutex_unlock (&x_mutex);
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}
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pthread_exit (NULL);
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}
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