tests/kernel/t_ucontext.c

   1 /* $NetBSD$ */
   2
   3 /*
   4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __COPYRIGHT("@(#) Copyright (c) 2008\
  31  The NetBSD Foundation, inc. All rights reserved.");
  32 __RCSID("$NetBSD$");
  33
  34 #include <stdio.h>
  35 #include <ucontext.h>
  36
  37 #include <atf-c.h>
  38
  39 ATF_TC(ucontext);
  40 ATF_TC_HEAD(ucontext, tc)
  41 {
  42         atf_tc_set_md_var(tc, "descr", "Checks {get,set}context(2)");
  43 }
  44 ATF_TC_BODY(ucontext, tc)
  45 {
  46         ucontext_t u, v, w;
  47         volatile int x, y;
  48
  49         x = 0;
  50         y = 0;
  51
  52         printf("Start\n");
  53
  54         getcontext(&u);
  55         y++;
  56
  57         printf("x == %d\n", x);
  58
  59         getcontext(&v);
  60
  61         if ( x < 20 ) {
  62                 x++;
  63                 getcontext(&w);
  64                 setcontext(&u);
  65         }
  66
  67         printf("End, y = %d\n", y);
  68         ATF_REQUIRE_EQ(y, 21);
  69 }
  70
  71 ATF_TP_ADD_TCS(tp)
  72 {
  73         ATF_TP_ADD_TC(tp, ucontext);
  74
  75         return atf_no_error();
  76 }