1 /*-
2 * Copyright (c) 2016 Maksym Sobolyev
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/stat.h>
31 #include <dlfcn.h>
32 #include <errno.h>
33 #include <fcntl.h>
34 #include <signal.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <unistd.h>
38
39 #include <atf-c.h>
40
41 static const char *funname;
42 static char *soname;
43
44 static void
sigsegv_handler(int sig __unused)45 sigsegv_handler(int sig __unused)
46 {
47 unlink(soname);
48 free(soname);
49 atf_tc_fail("got SIGSEGV in the %s(3)", funname);
50 }
51
52 ATF_TC(dlopen_empty_test);
ATF_TC_HEAD(dlopen_empty_test,tc)53 ATF_TC_HEAD(dlopen_empty_test, tc)
54 {
55 atf_tc_set_md_var(tc, "descr", "Tests the dlopen() of an empty file "
56 "returns an error");
57 }
ATF_TC_BODY(dlopen_empty_test,tc)58 ATF_TC_BODY(dlopen_empty_test, tc)
59 {
60 char tempname[] = "/tmp/temp.XXXXXX";
61 char *fname;
62 int fd;
63 void *dlh;
64 struct sigaction act, oact;
65
66 fname = mktemp(tempname);
67 ATF_REQUIRE_MSG(fname != NULL, "mktemp failed; errno=%d", errno);
68 asprintf(&soname, "%s.so", fname);
69 ATF_REQUIRE_MSG(soname != NULL, "asprintf failed; errno=%d", ENOMEM);
70 fd = open(soname, O_WRONLY | O_CREAT | O_TRUNC, DEFFILEMODE);
71 ATF_REQUIRE_MSG(fd != -1, "open(\"%s\") failed; errno=%d", soname, errno);
72 close(fd);
73
74 act.sa_handler = sigsegv_handler;
75 act.sa_flags = 0;
76 sigemptyset(&act.sa_mask);
77 ATF_CHECK_MSG(sigaction(SIGSEGV, &act, &oact) != -1,
78 "sigaction() failed");
79
80 funname = "dlopen";
81 dlh = dlopen(soname, RTLD_LAZY);
82 if (dlh != NULL) {
83 funname = "dlclose";
84 dlclose(dlh);
85 }
86 ATF_REQUIRE_MSG(dlh == NULL, "dlopen(\"%s\") did not fail", soname);
87 unlink(soname);
88 free(soname);
89 }
90
ATF_TP_ADD_TCS(tp)91 ATF_TP_ADD_TCS(tp)
92 {
93
94 ATF_TP_ADD_TC(tp, dlopen_empty_test);
95
96 return (atf_no_error());
97 }
98