stdlib/tst-makecontext.c

   1 /* Copyright (C) 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <ucontext.h>
  22
  23 ucontext_t ucp;
  24 char st1[8192];
  25 __thread int thr;
  26
  27 void
  28 cf (int i)
  29 {
  30   if (i != 78 || thr != 94)
  31     {
  32       printf ("i %d thr %d\n", i, thr);
  33       exit (1);
  34     }
  35   exit (0);
  36 }
  37
  38 int
  39 main (void)
  40 {
  41   if (getcontext (&ucp) != 0)
  42     {
  43       puts ("getcontext failed");
  44       return 1;
  45     }
  46   thr = 94;
  47   ucp.uc_link = NULL;
  48   ucp.uc_stack.ss_sp = st1;
  49   ucp.uc_stack.ss_size = sizeof st1;
  50   makecontext (&ucp, (void (*) ()) cf, 1, 78);
  51   if (setcontext (&ucp) != 0)
  52     {
  53       puts ("setcontext failed");
  54       return 1;
  55     }
  56   return 2;
  57 }