1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <gtest/gtest.h>
18
19 #include <dlfcn.h>
20 #include <libgen.h>
21 #include <limits.h>
22 #include <stdio.h>
23 #include <stdint.h>
24
25 #include <string>
26
main_global_default_serial()27 extern "C" int main_global_default_serial() {
28 return 3370318;
29 }
30
main_global_protected_serial()31 extern "C" int main_global_protected_serial() {
32 return 2716057;
33 }
34
35 // The following functions are defined in DT_NEEDED
36 // libdl_preempt_test.so library.
37
38 // This one calls main_global_default_serial
39 extern "C" int main_global_default_get_serial();
40
41 // This one calls main_global_protected_serial
42 extern "C" int main_global_protected_get_serial();
43
44 // This one calls lib_global_default_serial
45 extern "C" int lib_global_default_get_serial();
46
47 // This one calls lib_global_protected_serial
48 extern "C" int lib_global_protected_get_serial();
49
50 // This test verifies that the global default function
51 // main_global_default_serial() is preempted by
52 // the function defined above.
TEST(dl,main_preempts_global_default)53 TEST(dl, main_preempts_global_default) {
54 ASSERT_EQ(3370318, main_global_default_get_serial());
55 }
56
57 // This one makes sure that the global protected
58 // symbols do not get preempted
TEST(dl,main_does_not_preempt_global_protected)59 TEST(dl, main_does_not_preempt_global_protected) {
60 ASSERT_EQ(3370318, main_global_protected_get_serial());
61 }
62
63 // check same things for lib
TEST(dl,lib_preempts_global_default)64 TEST(dl, lib_preempts_global_default) {
65 ASSERT_EQ(3370318, lib_global_default_get_serial());
66 }
67
TEST(dl,lib_does_not_preempt_global_protected)68 TEST(dl, lib_does_not_preempt_global_protected) {
69 ASSERT_EQ(3370318, lib_global_protected_get_serial());
70 }
71
72 // TODO: Add tests for LD_PRELOADs
73