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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [gdb/] [testsuite/] [gdb.threads/] [watchthreads2.c] - Blame information for rev 330

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1 330 jeremybenn
/* 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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