tests/lib/libc/sys/t_getcontext.c

   1 /* $NetBSD: t_getcontext.c,v 1.3 2011/07/14 04:59:14 jruoho Exp $ */
   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: t_getcontext.c,v 1.3 2011/07/14 04:59:14 jruoho Exp $");
  33
  34 #include <atf-c.h>
  35 #include <errno.h>
  36 #include <stdarg.h>
  37 #include <stdlib.h>
  38 #include <ucontext.h>
  39
  40 #define STACKSZ (10*1024)
  41 #define DEPTH 3
  42
  43 static int calls;
  44
  45 static void
  46 run(int n, ...)
  47 {
  48         va_list va;
  49         int i, ia;
  50
  51         ATF_REQUIRE_EQ(n, DEPTH - calls - 1);
  52
  53         va_start(va, n);
  54         for (i = 0; i < 9; i++) {
  55                 ia = va_arg(va, int);
  56                 ATF_REQUIRE_EQ(i, ia);
  57         }
  58         va_end(va);
  59
  60         calls++;
  61 }
  62
  63 ATF_TC(getcontext_err);
  64 ATF_TC_HEAD(getcontext_err, tc)
  65 {
  66         atf_tc_set_md_var(tc, "descr", "Test errors from getcontext(2)");
  67 }
  68
  69 ATF_TC_BODY(getcontext_err, tc)
  70 {
  71
  72         errno = 0;
  73         ATF_REQUIRE_ERRNO(EFAULT, getcontext((void *)-1) == -1);
  74 }
  75
  76 ATF_TC(setcontext_err);
  77 ATF_TC_HEAD(setcontext_err, tc)
  78 {
  79         atf_tc_set_md_var(tc, "descr", "Test errors from setcontext(2)");
  80 }
  81
  82 ATF_TC_BODY(setcontext_err, tc)
  83 {
  84
  85         errno = 0;
  86         ATF_REQUIRE_ERRNO(EFAULT, setcontext((void *)-1) == -1);
  87 }
  88
  89 ATF_TC(setcontext_link);
  90 ATF_TC_HEAD(setcontext_link, tc)
  91 {
  92
  93         atf_tc_set_md_var(tc, "descr",
  94         "Checks get/make/setcontext(), context linking via uc_link(), "
  95             "and argument passing to the new context");
  96 }
  97
  98 ATF_TC_BODY(setcontext_link, tc)
  99 {
 100         ucontext_t uc[DEPTH];
 101         ucontext_t save;
 102         volatile int i = 0; /* avoid longjmp clobbering */
 103
 104         for (i = 0; i < DEPTH; ++i) {
 105                 ATF_REQUIRE_EQ(getcontext(&uc[i]), 0);
 106
 107                 uc[i].uc_stack.ss_sp = malloc(STACKSZ);
 108                 uc[i].uc_stack.ss_size = STACKSZ;
 109                 uc[i].uc_link = (i > 0) ? &uc[i - 1] : &save;
 110
 111                 makecontext(&uc[i], (void *)run, 10, i,
 112                         0, 1, 2, 3, 4, 5, 6, 7, 8);
 113         }
 114
 115         ATF_REQUIRE_EQ(getcontext(&save), 0);
 116
 117         if (calls == 0)
 118                 ATF_REQUIRE_EQ(setcontext(&uc[DEPTH-1]), 0);
 119 }
 120
 121 ATF_TP_ADD_TCS(tp)
 122 {
 123
 124         ATF_TP_ADD_TC(tp, getcontext_err);
 125         ATF_TP_ADD_TC(tp, setcontext_err);
 126         ATF_TP_ADD_TC(tp, setcontext_link);
 127
 128         return atf_no_error();
 129 }