gdb/testsuite/gdb.base/attach-twice.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2011-2022 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 <stdlib.h>
  20 #include <unistd.h>
  21 #include <sys/types.h>
  22 #include <sys/ptrace.h>
  23 #include <errno.h>
  24
  25 #ifndef PTRACE_ATTACH
  26 #define PTRACE_ATTACH PT_ATTACH
  27 #endif
  28
  29 int
  30 main (void)
  31 {
  32   long l;
  33
  34   switch (fork ())
  35   {
  36     case -1:
  37       perror ("fork");
  38       exit (1);
  39     case 0:
  40       errno = 0;
  41       /* The 4th argument to ptrace () is 0 on purpose, as it is compatible
  42          between kernels that accept void* (like Linux) and int (NetBSD).  */
  43       ptrace (PTRACE_ATTACH, getppid (), NULL, 0);
  44       if (errno != 0)
  45         perror ("PTRACE_ATTACH");
  46       break;
  47   }
  48   sleep (600);
  49   return 0;
  50 }