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 30 extern "C" int main_global_default_serial() { 31 return 3370318; 32 } 33 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. 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 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 67 TEST(dl, lib_preempts_global_default) { 68 ASSERT_EQ(3370318, lib_global_default_get_serial()); 69 } 70 71 TEST(dl, lib_does_not_preempt_global_protected) { 72 ASSERT_EQ(3370318, lib_global_protected_get_serial()); 73 } 74 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 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 } 100 101 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
