gdb/testsuite/gdb.threads/names.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2015-2016 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 #define _GNU_SOURCE
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <pthread.h>
  22 #include <assert.h>
  23
  24 #define NUM_THREADS 3
  25
  26 struct thread_data
  27 {
  28   const char *name;
  29   pthread_barrier_t *barrier;
  30 };
  31
  32 static void *
  33 thread_func (void *varg)
  34 {
  35   struct thread_data *arg = (struct thread_data *) varg;
  36   int res;
  37
  38   res = pthread_setname_np (pthread_self (), arg->name);
  39   assert (res == 0);
  40
  41   pthread_barrier_wait (arg->barrier);
  42
  43   pthread_barrier_wait (arg->barrier);
  44
  45   return NULL;
  46 }
  47
  48 static void
  49 all_threads_ready (void)
  50 {
  51 }
  52
  53 int
  54 main (int argc, char **argv)
  55 {
  56   pthread_t threads[NUM_THREADS];
  57   struct thread_data args[NUM_THREADS];
  58   pthread_barrier_t barrier;
  59   int i, res;
  60   const char *names[] = { "carrot", "potato", "celery" };
  61
  62   alarm (20);
  63
  64   /* Make sure that NAMES contains NUM_THREADS elements.  */
  65   assert (sizeof (names) / sizeof (names[0]) == NUM_THREADS);
  66
  67   res = pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
  68   assert (res == 0);;
  69
  70   res = pthread_setname_np (pthread_self (), "main");
  71   assert (res == 0);
  72
  73   for (i = 0; i < NUM_THREADS; i++)
  74     {
  75       struct thread_data *arg = &args[i];
  76
  77       arg->name = names[i];
  78       arg->barrier = &barrier;
  79
  80       res = pthread_create (&threads[i], NULL, thread_func, arg);
  81       assert (res == 0);
  82     }
  83
  84   pthread_barrier_wait (&barrier);
  85
  86   all_threads_ready ();
  87
  88   pthread_barrier_wait (&barrier);
  89
  90   for (i = 0; i < NUM_THREADS; i++)
  91     {
  92       res = pthread_join (threads[i], NULL);
  93       assert (res == 0);
  94     }
  95
  96   return 0;
  97 }