1 /*-
2 *
3 * Copyright (C) 2023 NetApp, Inc.
4 *
5 * SPDX-License-Identifier: BSD-2-Clause
6 *
7 */
8
9 #include <dlfcn.h>
10
11 #include <atf-c.h>
12
13 int get_value(void);
14 void set_value(int);
15
16 #define APP_VALUE 5
17 #define LIB_VALUE 20
18
19 ATF_TC_WITHOUT_HEAD(deepbind_simple);
ATF_TC_BODY(deepbind_simple,tc)20 ATF_TC_BODY(deepbind_simple, tc)
21 {
22 void *hdl;
23 void (*proxy_set_value)(int);
24 int (*proxy_get_value)(void);
25 int app_value, lib_value;
26
27 set_value(APP_VALUE);
28
29 /*
30 * libdeep has a dependency on libval2.so, which is a rebuild of
31 * libval.so that provides get_value() and set_value() for both us and
32 * the lib. The lib's get_value() and set_value() should bind to the
33 * versions in libval2 instead of libval with RTLD_DEEPBIND.
34 */
35 hdl = dlopen("$ORIGIN/libdeep.so", RTLD_LAZY | RTLD_DEEPBIND);
36 ATF_REQUIRE(hdl != NULL);
37
38 proxy_set_value = dlsym(hdl, "proxy_set_value");
39 ATF_REQUIRE(proxy_set_value != NULL);
40
41 proxy_get_value = dlsym(hdl, "proxy_get_value");
42 ATF_REQUIRE(proxy_get_value != NULL);
43
44 (*proxy_set_value)(LIB_VALUE);
45
46 lib_value = (*proxy_get_value)();
47 app_value = get_value();
48
49 /*
50 * In the initial implementation or if libdeep.so is *not* linked
51 * against its own libval2, then these both return the later set
52 * LIB_VALUE (20) as they bind to the symbol provided by libval and
53 * use its .bss val.
54 */
55 ATF_REQUIRE_INTEQ(lib_value, LIB_VALUE);
56 ATF_REQUIRE_INTEQ(app_value, APP_VALUE);
57 }
58
ATF_TP_ADD_TCS(tp)59 ATF_TP_ADD_TCS(tp)
60 {
61
62 ATF_TP_ADD_TC(tp, deepbind_simple);
63
64 return atf_no_error();
65 }
66