1 /*
2 * Copyright (C) 2020 The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <android/dlext.h>
30 #include <dlfcn.h>
31 #include <stdlib.h>
32
33 #include <string>
34
35 #include "../core_shared_libs.h"
36 #include "../dlext_private.h"
37
38 extern "C" void global_function();
39 extern "C" void internal_function();
40
main(int argc,char * argv[])41 int main(int argc, char* argv[]) {
42 if (argc != 2) {
43 fprintf(stderr, "usage: %s NS_PATH\n", argv[0]);
44 fprintf(stderr, "NS_PATH path to the ns_hidden_child_app directory\n");
45 exit(1);
46 }
47
48 // Ensure that -Wl,--needed doesn't break the test by removing DT_NEEDED entries.
49 global_function();
50 internal_function();
51
52 const char* app_lib_dir = argv[1];
53 android_namespace_t* app_ns =
54 android_create_namespace("app", nullptr, app_lib_dir, ANDROID_NAMESPACE_TYPE_ISOLATED,
55 nullptr, nullptr);
56 if (app_ns == nullptr) {
57 fprintf(stderr, "android_create_namespace failed: %s\n", dlerror());
58 exit(1);
59 }
60
61 std::string public_libs = std::string(kCoreSharedLibs) + ":libns_hidden_child_public.so";
62 if (!android_link_namespaces(app_ns, nullptr, public_libs.c_str())) {
63 fprintf(stderr, "android_link_namespaces failed: %s\n", dlerror());
64 exit(1);
65 }
66
67 android_dlextinfo ext = {
68 .flags = ANDROID_DLEXT_USE_NAMESPACE,
69 .library_namespace = app_ns,
70 };
71 void* app_lib = android_dlopen_ext("libns_hidden_child_app.so", RTLD_NOW | RTLD_LOCAL, &ext);
72 if (app_lib == nullptr) {
73 fprintf(stderr, "android_dlopen_ext failed: %s\n", dlerror());
74 exit(1);
75 }
76
77 auto app_function = reinterpret_cast<void(*)()>(dlsym(app_lib, "app_function"));
78 if (app_function == nullptr) {
79 fprintf(stderr, "dlsym failed to find app_function: %s\n", dlerror());
80 exit(1);
81 }
82
83 app_function();
84 return 0;
85 }
86