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

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2002-2013 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 */
  19
  20 #include <unistd.h>
  21 #include <stdlib.h>
  22 #include <pthread.h>
  23
  24 unsigned int args[2];
  25 int trigger = 0;
  26
  27 void *
  28 thread_function0 (void *arg)
  29 {
  30   int my_number =  (long) arg;
  31   volatile int *myp = (volatile int *) &args[my_number];
  32
  33   while (*myp > 0)
  34     {
  35       (*myp) ++;
  36       usleep (1);  /* Loop increment 1.  */
  37     }
  38
  39   return NULL;
  40 }
  41
  42 void *
  43 thread_function0_1 (void *arg)
  44 {
  45   void *ret = thread_function0 (arg);
  46
  47   return ret; /* set breakpoint here */
  48 }
  49
  50 void *
  51 thread_function1 (void *arg)
  52 {
  53   int my_number =  (long) arg;
  54
  55   volatile int *myp = (volatile int *) &args[my_number];
  56
  57   while (*myp > 0)
  58     {
  59       (*myp) ++;
  60       usleep (1);  /* Loop increment 2.  */
  61     }
  62
  63   return NULL;
  64 }
  65
  66 int
  67 main ()
  68 {
  69   int res;
  70   pthread_t threads[2];
  71   void *thread_result;
  72   long i = 0;
  73
  74   args[i] = 1; /* Init value.  */
  75   res = pthread_create (&threads[i], NULL,
  76                         thread_function0_1,
  77                         (void *) i);
  78
  79   i++;
  80   args[i] = 1; /* Init value.  */
  81   res = pthread_create(&threads[i], NULL,
  82                        thread_function1,
  83                        (void *) i);
  84
  85   pthread_join (threads[0], &thread_result);
  86   pthread_join (threads[1], &thread_result);
  87   exit(EXIT_SUCCESS);
  88 }