gdb/testsuite/gdb.threads/local-watch-wrong-thread.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include <unistd.h>
  22 #include <stdlib.h>
  23 #include <pthread.h>
  24
  25 unsigned int args[2];
  26 int trigger = 0;
  27
  28 void *
  29 thread_function0 (void *arg)
  30 {
  31   int my_number =  (long) arg;
  32   volatile int *myp = (volatile int *) &args[my_number];
  33
  34   while (*myp > 0)
  35     {
  36       (*myp) ++;
  37       usleep (1);  /* Loop increment 1.  */
  38     }
  39
  40   return NULL;
  41 }
  42
  43 void *
  44 thread_function0_1 (void *arg)
  45 {
  46   void *ret = thread_function0 (arg);
  47
  48   return ret; /* set breakpoint here */
  49 }
  50
  51 void *
  52 thread_function1 (void *arg)
  53 {
  54   int my_number =  (long) arg;
  55
  56   volatile int *myp = (volatile int *) &args[my_number];
  57
  58   while (*myp > 0)
  59     {
  60       (*myp) ++;
  61       usleep (1);  /* Loop increment 2.  */
  62     }
  63
  64   return NULL;
  65 }
  66
  67 int
  68 main ()
  69 {
  70   int res;
  71   pthread_t threads[2];
  72   void *thread_result;
  73   long i = 0;
  74
  75   args[i] = 1; /* Init value.  */
  76   res = pthread_create (&threads[i], NULL,
  77                         thread_function0_1,
  78                         (void *) i);
  79
  80   i++;
  81   args[i] = 1; /* Init value.  */
  82   res = pthread_create(&threads[i], NULL,
  83                        thread_function1,
  84                        (void *) i);
  85
  86   pthread_join (threads[0], &thread_result);
  87   pthread_join (threads[1], &thread_result);
  88   exit(EXIT_SUCCESS);
  89 }