gdb/testsuite/gdb.base/watchpoint-hw-attach.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2018-2021 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 <stdio.h>
  19 #include <sys/types.h>
  20 #include <unistd.h>
  21
  22 /* This is set to 1 by the debugger post attach to continue to the
  23  watchpoint trigger.  */
  24 volatile int should_continue = 0;
  25 /* The variable to place a watchpoint on.  */
  26 volatile int watched_variable = 0;
  27
  28 int
  29 main (void)
  30 {
  31   unsigned int counter = 1;
  32   int mypid = getpid ();
  33
  34   /* Wait for the debugger to attach, but not indefinitely so this
  35      test program is not left hanging around.  */
  36   for (counter = 0; !should_continue && counter < 100; counter++)
  37     sleep (1);                  /* pidacquired */
  38
  39   /* Trigger a watchpoint.  */
  40   watched_variable = 4;
  41   printf ("My variable is %d\n", watched_variable);
  42   return 0;
  43 }