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 extern "C" int main_global_default_serial() { 28 return 3370318; 29 } 30 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. 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 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 64 TEST(dl, lib_preempts_global_default) { 65 ASSERT_EQ(3370318, lib_global_default_get_serial()); 66 } 67 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
