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

   1 /* Test case for forgotten hw-watchpoints after fork()-off of a process.
   2
   3    Copyright 2012-2021 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 <string.h>
  21 #include <errno.h>
  22 #include <sys/types.h>
  23 #include <unistd.h>
  24 #include <assert.h>
  25 #include <stdio.h>
  26 #include <sys/wait.h>
  27
  28 #include "watchpoint-fork.h"
  29
  30 void
  31 forkoff (int nr)
  32 {
  33   pid_t child, pid_got;
  34   int exit_code = 42 + nr;
  35   int status, i;
  36
  37   child = fork ();
  38   switch (child)
  39     {
  40     case -1:
  41       assert (0);
  42     case 0:
  43 #if DEBUG
  44       printf ("child%d: %d\n", nr, (int) getpid ());
  45       /* Delay to get both the "child%d" and "parent%d" message printed without
  46          a race breaking expect by its endless wait on `$gdb_prompt$':
  47          Breakpoint 3, marker () at ../../../gdb/testsuite/gdb.threads/watchpoint-fork.c:33
  48          33      }
  49          (gdb) parent2: 14223  */
  50       i = sleep (1);
  51       assert (i == 0);
  52 #endif
  53
  54       /* We must not get caught here (against a forgotten breakpoint).  */
  55       var++;
  56       marker ();
  57
  58       _exit (exit_code);
  59     default:
  60 #if DEBUG
  61       printf ("parent%d: %d\n", nr, (int) child);
  62       /* Delay to get both the "child%d" and "parent%d" message printed, see
  63          above.  */
  64       i = sleep (1);
  65       assert (i == 0);
  66 #endif
  67
  68       pid_got = wait (&status);
  69       assert (pid_got == child);
  70       assert (WIFEXITED (status));
  71       assert (WEXITSTATUS (status) == exit_code);
  72
  73       /* We must get caught here (against a false watchpoint removal).  */
  74       marker ();
  75     }
  76 }