1 /* 2 * Copyright (C) 2021 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 #ifndef ART_LIBNATIVELOADER_NATIVE_LOADER_TEST_H_ 18 #define ART_LIBNATIVELOADER_NATIVE_LOADER_TEST_H_ 19 20 #include <string.h> 21 22 #include <memory> 23 24 #include "gmock/gmock.h" 25 #include "jni.h" 26 27 namespace android { 28 namespace nativeloader { 29 30 class MockJni { 31 public: ~MockJni()32 virtual ~MockJni() {} 33 MOCK_METHOD1(JniObject_getParent, const char*(const char*)); 34 }; 35 36 static std::unique_ptr<MockJni> jni_mock; 37 38 // A very simple JNI mock. 39 // jstring is a pointer to utf8 char array. We don't need utf16 char here. 40 // jobject, jclass, and jmethodID are also a pointer to utf8 char array 41 // Only a few JNI methods that are actually used in libnativeloader are mocked. CreateJNINativeInterface()42 JNINativeInterface* CreateJNINativeInterface() { 43 JNINativeInterface* inf = new JNINativeInterface(); 44 memset(inf, 0, sizeof(JNINativeInterface)); 45 46 inf->GetStringUTFChars = [](JNIEnv*, jstring s, jboolean*) -> const char* { 47 return reinterpret_cast<const char*>(s); 48 }; 49 50 inf->ReleaseStringUTFChars = [](JNIEnv*, jstring, const char*) -> void { return; }; 51 52 inf->NewStringUTF = [](JNIEnv*, const char* bytes) -> jstring { 53 return reinterpret_cast<jstring>(const_cast<char*>(bytes)); 54 }; 55 56 inf->FindClass = [](JNIEnv*, const char* name) -> jclass { 57 return reinterpret_cast<jclass>(const_cast<char*>(name)); 58 }; 59 60 inf->CallObjectMethodV = [](JNIEnv*, jobject obj, jmethodID mid, va_list) -> jobject { 61 if (strcmp("getParent", reinterpret_cast<const char*>(mid)) == 0) { 62 // JniObject_getParent can be a valid jobject or nullptr if there is 63 // no parent classloader. 64 const char* ret = jni_mock->JniObject_getParent(reinterpret_cast<const char*>(obj)); 65 return reinterpret_cast<jobject>(const_cast<char*>(ret)); 66 } 67 return nullptr; 68 }; 69 70 inf->GetMethodID = [](JNIEnv*, jclass, const char* name, const char*) -> jmethodID { 71 return reinterpret_cast<jmethodID>(const_cast<char*>(name)); 72 }; 73 74 inf->NewWeakGlobalRef = [](JNIEnv*, jobject obj) -> jobject { return obj; }; 75 76 inf->IsSameObject = [](JNIEnv*, jobject a, jobject b) -> jboolean { 77 return strcmp(reinterpret_cast<const char*>(a), reinterpret_cast<const char*>(b)) == 0; 78 }; 79 80 return inf; 81 } 82 83 } // namespace nativeloader 84 } // namespace android 85 86 #endif // ART_LIBNATIVELOADER_NATIVE_LOADER_TEST_H_ 87