stdlib/tst-makecontext.c

   1 /* Copyright (C) 2006, 2007, 2008 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 <errno.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <ucontext.h>
  23
  24 ucontext_t ucp;
  25 char st1[8192];
  26 __thread int thr;
  27
  28 int somevar = -76;
  29 long othervar = -78L;
  30
  31 void
  32 cf (int i)
  33 {
  34   if (i != othervar || thr != 94)
  35     {
  36       printf ("i %d thr %d\n", i, thr);
  37       exit (1);
  38     }
  39   exit (0);
  40 }
  41
  42 int
  43 do_test (void)
  44 {
  45   if (getcontext (&ucp) != 0)
  46     {
  47       if (errno == ENOSYS)
  48         {
  49           puts ("context handling not supported");
  50           return 0;
  51         }
  52
  53       puts ("getcontext failed");
  54       return 1;
  55     }
  56   thr = 94;
  57   ucp.uc_link = NULL;
  58   ucp.uc_stack.ss_sp = st1;
  59   ucp.uc_stack.ss_size = sizeof st1;
  60   makecontext (&ucp, (void (*) (void)) cf, 1, somevar - 2);
  61   if (setcontext (&ucp) != 0)
  62     {
  63       puts ("setcontext failed");
  64       return 1;
  65     }
  66   return 2;
  67 }
  68
  69 #define TEST_FUNCTION do_test ()
  70 #include "../test-skeleton.c"