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glibc  2.9
tst-makecontext.c
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00001 /* Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <stdlib.h>
00021 #include <stdio.h>
00022 #include <ucontext.h>
00023 
00024 ucontext_t ucp;
00025 char st1[8192];
00026 __thread int thr;
00027 
00028 int somevar = -76;
00029 long othervar = -78L;
00030 
00031 void
00032 cf (int i)
00033 {
00034   if (i != othervar || thr != 94)
00035     {
00036       printf ("i %d thr %d\n", i, thr);
00037       exit (1);
00038     }
00039   exit (0);
00040 }
00041 
00042 int
00043 do_test (void)
00044 {
00045   if (getcontext (&ucp) != 0)
00046     {
00047       if (errno == ENOSYS)
00048        {
00049          puts ("context handling not supported");
00050          return 0;
00051        }
00052 
00053       puts ("getcontext failed");
00054       return 1;
00055     }
00056   thr = 94;
00057   ucp.uc_link = NULL;
00058   ucp.uc_stack.ss_sp = st1;
00059   ucp.uc_stack.ss_size = sizeof st1;
00060   makecontext (&ucp, (void (*) (void)) cf, 1, somevar - 2);
00061   if (setcontext (&ucp) != 0)
00062     {
00063       puts ("setcontext failed");
00064       return 1;
00065     }
00066   return 2;
00067 }
00068 
00069 #define TEST_FUNCTION do_test ()
00070 #include "../test-skeleton.c"