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
27 #include "gtest_globals.h"
28 #include "utils.h"
29
main_global_default_serial()30 extern "C" int main_global_default_serial() {
31 return 3370318;
32 }
33
main_global_protected_serial()34 extern "C" int main_global_protected_serial() {
35 return 2716057;
36 }
37
38 // The following functions are defined in DT_NEEDED
39 // libdl_preempt_test.so library.
40
41 // This one calls main_global_default_serial
42 extern "C" int main_global_default_get_serial();
43
44 // This one calls main_global_protected_serial
45 extern "C" int main_global_protected_get_serial();
46
47 // This one calls lib_global_default_serial
48 extern "C" int lib_global_default_get_serial();
49
50 // This one calls lib_global_protected_serial
51 extern "C" int lib_global_protected_get_serial();
52
53 // This test verifies that the global default function
54 // main_global_default_serial() is preempted by
55 // the function defined above.
TEST(dl,main_preempts_global_default)56 TEST(dl, main_preempts_global_default) {
57 ASSERT_EQ(3370318, main_global_default_get_serial());
58 }
59
60 // This one makes sure that the global protected
61 // symbols do not get preempted
TEST(dl,main_does_not_preempt_global_protected)62 TEST(dl, main_does_not_preempt_global_protected) {
63 ASSERT_EQ(3370318, main_global_protected_get_serial());
64 }
65
66 // check same things for lib
TEST(dl,lib_preempts_global_default)67 TEST(dl, lib_preempts_global_default) {
68 ASSERT_EQ(3370318, lib_global_default_get_serial());
69 }
70
TEST(dl,lib_does_not_preempt_global_protected)71 TEST(dl, lib_does_not_preempt_global_protected) {
72 ASSERT_EQ(3370318, lib_global_protected_get_serial());
73 }
74
TEST(dl,exec_linker)75 TEST(dl, exec_linker) {
76 #if defined(__BIONIC__)
77 #if defined(__LP64__)
78 static constexpr const char* kPathToLinker = "/system/bin/linker64";
79 #else
80 static constexpr const char* kPathToLinker = "/system/bin/linker";
81 #endif
82 ExecTestHelper eth;
83 std::string expected_output = std::string("This is ") + kPathToLinker +
84 ", the helper program for dynamic executables.\n";
85 eth.SetArgs( { kPathToLinker, nullptr });
86 eth.Run([&]() { execve(kPathToLinker, eth.GetArgs(), eth.GetEnv()); }, 0, expected_output.c_str());
87 #endif
88 }
89
TEST(dl,preinit_system_calls)90 TEST(dl, preinit_system_calls) {
91 #if defined(__BIONIC__)
92 std::string helper = get_testlib_root() +
93 "/preinit_syscall_test_helper/preinit_syscall_test_helper";
94 chmod(helper.c_str(), 0755); // TODO: "x" lost in CTS, b/34945607
95 ExecTestHelper eth;
96 eth.SetArgs({ helper.c_str(), nullptr });
97 eth.Run([&]() { execve(helper.c_str(), eth.GetArgs(), eth.GetEnv()); }, 0, nullptr);
98 #endif
99 }
100
TEST(dl,xfail_preinit_getauxval)101 TEST(dl, xfail_preinit_getauxval) {
102 #if defined(__BIONIC__)
103 std::string helper = get_testlib_root() +
104 "/preinit_getauxval_test_helper/preinit_getauxval_test_helper";
105 chmod(helper.c_str(), 0755); // TODO: "x" lost in CTS, b/34945607
106 ExecTestHelper eth;
107 eth.SetArgs({ helper.c_str(), nullptr });
108 eth.Run([&]() { execve(helper.c_str(), eth.GetArgs(), eth.GetEnv()); }, 0, nullptr);
109 #endif
110 }
111
112 // TODO: Add tests for LD_PRELOADs
113