1 /* $NetBSD: t_minherit.c,v 1.1 2014/07/18 12:34:52 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_minherit.c,v 1.1 2014/07/18 12:34:52 christos Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/mman.h> 36 #include <sys/sysctl.h> 37 #include <sys/wait.h> 38 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include <atf-c.h> 46 47 static long page; 48 49 static void * 50 makemap(int v, int f) { 51 void *map = mmap(NULL, page, PROT_READ|PROT_WRITE, 52 MAP_SHARED|MAP_ANON, -1, 0); 53 ATF_REQUIRE(map != MAP_FAILED); 54 memset(map, v, page); 55 if (f != 666) 56 ATF_REQUIRE(minherit(map, page, f) == 0); 57 else 58 ATF_REQUIRE(minherit(map, page, f) == -1); 59 return map; 60 } 61 62 ATF_TC(minherit_copy); 63 ATF_TC_HEAD(minherit_copy, tc) 64 { 65 atf_tc_set_md_var(tc, "descr", 66 "Test for MAP_INHERIT_COPY from minherit(2)"); 67 } 68 69 ATF_TC_BODY(minherit_copy, tc) 70 { 71 void *map1 = makemap(1, MAP_INHERIT_COPY); 72 void *map2 = makemap(1, MAP_INHERIT_COPY); 73 switch (fork()) { 74 default: 75 ATF_REQUIRE(wait(NULL) != -1); 76 ATF_REQUIRE(memcmp(map1, map2, page) == 0); 77 break; 78 case -1: 79 ATF_REQUIRE(0); 80 break; 81 case 0: 82 ATF_REQUIRE(memcmp(map1, map2, page) == 0); 83 memset(map1, 0, page); 84 exit(0); 85 } 86 } 87 88 ATF_TC(minherit_share); 89 ATF_TC_HEAD(minherit_share, tc) 90 { 91 atf_tc_set_md_var(tc, "descr", 92 "Test for MAP_INHERIT_SHARE from minherit(2)"); 93 } 94 95 ATF_TC_BODY(minherit_share, tc) 96 { 97 void *map1 = makemap(1, MAP_INHERIT_SHARE); 98 void *map2 = makemap(1, MAP_INHERIT_SHARE); 99 100 switch (fork()) { 101 default: 102 ATF_REQUIRE(wait(NULL) != -1); 103 memset(map2, 0, page); 104 ATF_REQUIRE(memcmp(map1, map2, page) == 0); 105 break; 106 case -1: 107 ATF_REQUIRE(0); 108 break; 109 case 0: 110 ATF_REQUIRE(memcmp(map1, map2, page) == 0); 111 memset(map1, 0, page); 112 exit(0); 113 } 114 } 115 116 static void 117 segv(int n) { 118 _exit(n); 119 } 120 121 ATF_TC(minherit_none); 122 ATF_TC_HEAD(minherit_none, tc) 123 { 124 atf_tc_set_md_var(tc, "descr", 125 "Test for MAP_INHERIT_NONE from minherit(2)"); 126 } 127 128 ATF_TC_BODY(minherit_none, tc) 129 { 130 void *map1 = makemap(0, MAP_INHERIT_NONE); 131 int status; 132 133 switch (fork()) { 134 default: 135 ATF_REQUIRE(wait(&status) != -1); 136 ATF_REQUIRE(WEXITSTATUS(status) == SIGSEGV); 137 break; 138 case -1: 139 ATF_REQUIRE(0); 140 break; 141 case 0: 142 ATF_REQUIRE(signal(SIGSEGV, segv) != SIG_ERR); 143 memset(map1, 0, page); 144 exit(0); 145 } 146 } 147 148 ATF_TC(minherit_zero); 149 ATF_TC_HEAD(minherit_zero, tc) 150 { 151 atf_tc_set_md_var(tc, "descr", 152 "Test for MAP_INHERIT_ZERO from minherit(2)"); 153 } 154 155 ATF_TC_BODY(minherit_zero, tc) 156 { 157 void *map1 = makemap(1, MAP_INHERIT_ZERO); 158 void *map2 = makemap(0, MAP_INHERIT_SHARE); 159 160 switch (fork()) { 161 default: 162 ATF_REQUIRE(wait(NULL) != -1); 163 memset(map2, 1, page); 164 ATF_REQUIRE(memcmp(map1, map2, page) == 0); 165 break; 166 case -1: 167 ATF_REQUIRE(0); 168 break; 169 case 0: 170 ATF_REQUIRE(memcmp(map1, map2, page) == 0); 171 memset(map1, 2, page); 172 exit(0); 173 } 174 } 175 176 ATF_TC(minherit_bad); 177 ATF_TC_HEAD(minherit_bad, tc) 178 { 179 atf_tc_set_md_var(tc, "descr", 180 "Test for bad minherit(2)"); 181 } 182 183 ATF_TC_BODY(minherit_bad, tc) 184 { 185 (void)makemap(0, 666); 186 } 187 188 ATF_TP_ADD_TCS(tp) 189 { 190 page = sysconf(_SC_PAGESIZE); 191 ATF_REQUIRE(page >= 0); 192 193 ATF_TP_ADD_TC(tp, minherit_copy); 194 ATF_TP_ADD_TC(tp, minherit_share); 195 ATF_TP_ADD_TC(tp, minherit_none); 196 ATF_TP_ADD_TC(tp, minherit_zero); 197 ATF_TP_ADD_TC(tp, minherit_bad); 198 199 return atf_no_error(); 200 } 201
Indexes created Sat Sep 20 22:09:52 GMT 2025