gdb/testsuite/gdb.threads/step-over-lands-on-breakpoint.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2014-2015 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 #include <pthread.h>
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21
  22 pthread_barrier_t barrier;
  23 pthread_t child_thread;
  24
  25 volatile unsigned int counter = 1;
  26
  27 void *
  28 child_function (void *arg)
  29 {
  30   pthread_barrier_wait (&barrier);
  31
  32   while (counter > 0)
  33     {
  34       counter++;
  35
  36       asm ("    nop"); /* set breakpoint child here */
  37       asm ("    nop"); /* set breakpoint after step-over here */
  38       usleep (1);
  39     }
  40
  41   pthread_exit (NULL);
  42 }
  43
  44 static int
  45 wait_threads (void)
  46 {
  47   return 1; /* in wait_threads */
  48 }
  49
  50 int
  51 main ()
  52 {
  53   int res;
  54   long i;
  55
  56   pthread_barrier_init (&barrier, NULL, 2);
  57
  58   res = pthread_create (&child_thread, NULL, child_function, NULL);
  59   pthread_barrier_wait (&barrier);
  60   wait_threads (); /* set wait-thread breakpoint here */
  61
  62   pthread_join (child_thread, NULL);
  63
  64   exit (EXIT_SUCCESS);
  65 }