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