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      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 }
    130