t_getcontext.c revision 313498
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 43static int calls; 44 45static void 46run(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#if defined(__FreeBSD__) && defined(__amd64__) 55 for (i = 0; i < 5; i++) { 56#elif defined(__FreeBSD__) && defined(__mips__) 57 for (i = 0; i < 5; i++) { 58#else 59 for (i = 0; i < 9; i++) { 60#endif 61 ia = va_arg(va, int); 62 ATF_REQUIRE_EQ(i, ia); 63 } 64 va_end(va); 65 66 calls++; 67} 68 69ATF_TC(getcontext_err); 70ATF_TC_HEAD(getcontext_err, tc) 71{ 72 atf_tc_set_md_var(tc, "descr", "Test errors from getcontext(2)"); 73} 74 75ATF_TC_BODY(getcontext_err, tc) 76{ 77 78 errno = 0; 79 ATF_REQUIRE_ERRNO(EFAULT, getcontext((void *)-1) == -1); 80} 81 82ATF_TC(setcontext_err); 83ATF_TC_HEAD(setcontext_err, tc) 84{ 85 atf_tc_set_md_var(tc, "descr", "Test errors from setcontext(2)"); 86} 87 88ATF_TC_BODY(setcontext_err, tc) 89{ 90 91 errno = 0; 92 ATF_REQUIRE_ERRNO(EFAULT, setcontext((void *)-1) == -1); 93} 94 95ATF_TC(setcontext_link); 96ATF_TC_HEAD(setcontext_link, tc) 97{ 98 99 atf_tc_set_md_var(tc, "descr", 100 "Checks get/make/setcontext(), context linking via uc_link(), " 101 "and argument passing to the new context"); 102} 103 104ATF_TC_BODY(setcontext_link, tc) 105{ 106 ucontext_t uc[DEPTH]; 107 ucontext_t save; 108 volatile int i = 0; /* avoid longjmp clobbering */ 109 110 for (i = 0; i < DEPTH; ++i) { 111 ATF_REQUIRE_EQ(getcontext(&uc[i]), 0); 112 113 uc[i].uc_stack.ss_sp = malloc(STACKSZ); 114 uc[i].uc_stack.ss_size = STACKSZ; 115 uc[i].uc_link = (i > 0) ? &uc[i - 1] : &save; 116 117#if defined(__FreeBSD__) && defined(__amd64__) 118 /* FreeBSD/amd64 only permits up to 6 arguments. */ 119 makecontext(&uc[i], (void *)run, 6, i, 120 0, 1, 2, 3, 4); 121#elif defined(__FreeBSD__) && defined(__mips__) 122 /* FreeBSD/mips only permits up to 6 arguments. */ 123 makecontext(&uc[i], (void *)run, 6, i, 124 0, 1, 2, 3, 4); 125#else 126 makecontext(&uc[i], (void *)run, 10, i, 127 0, 1, 2, 3, 4, 5, 6, 7, 8); 128#endif 129 } 130 131 ATF_REQUIRE_EQ(getcontext(&save), 0); 132 133 if (calls == 0) 134 ATF_REQUIRE_EQ(setcontext(&uc[DEPTH-1]), 0); 135} 136 137ATF_TP_ADD_TCS(tp) 138{ 139 140 ATF_TP_ADD_TC(tp, getcontext_err); 141 ATF_TP_ADD_TC(tp, setcontext_err); 142 ATF_TP_ADD_TC(tp, setcontext_link); 143 144 return atf_no_error(); 145} 146