gdb/testsuite/gdb.threads/watchpoint-fork-st.c

   1 /* Test case for forgotten hw-watchpoints after fork()-off of a process.
   2
   3    Copyright 2012-2019 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "watchpoint-fork.h"
  21
  22 #include <assert.h>
  23 #include <unistd.h>
  24 #include <sys/wait.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27
  28 volatile int var;
  29
  30 void
  31 marker (void)
  32 {
  33 }
  34
  35 static void
  36 mark_exit (void)
  37 {
  38 }
  39
  40 int
  41 main (void)
  42 {
  43   setbuf (stdout, NULL);
  44   printf ("main: %d\n", (int) getpid ());
  45
  46   /* General hardware breakpoints and watchpoints validity.  */
  47   marker ();
  48   var++;
  49   /* Hardware watchpoints got disarmed here.  */
  50   forkoff (1);
  51   /* This watchpoint got lost before.  */
  52   var++;
  53   /* A sanity check for double hardware watchpoints removal.  */
  54   forkoff (2);
  55   var++;
  56
  57   mark_exit ();
  58   return 0;
  59 }