| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "IsolatedSplitApp" |
| |
| #include <android/log.h> |
| #include <dlfcn.h> |
| #include <stdio.h> |
| |
| #include "jni.h" |
| |
| #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__) |
| #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__) |
| |
| static jint add(JNIEnv* env, jobject thiz, jint numA, jint numB) { |
| return numA + numB; |
| } |
| |
| typedef int (*pFuncGetNumber)(); |
| |
| static jint get_number_from_other_library(const char* library_file_name, |
| const char* function_name) { |
| void* handle; |
| char* error; |
| handle = dlopen(library_file_name, RTLD_LAZY); |
| if (!handle) { |
| LOGE("Can't load %s: %s\n", library_file_name, dlerror()); |
| return -1; |
| } |
| pFuncGetNumber functionGetNumber = (pFuncGetNumber)dlsym(handle, function_name); |
| if ((error = dlerror()) != NULL) { |
| LOGE("Can't load function %s: %s\n", function_name, error); |
| dlclose(handle); |
| return -2; |
| } |
| int ret = functionGetNumber(); |
| dlclose(handle); |
| |
| return ret; |
| } |
| |
| static jint get_number_a_via_proxy(JNIEnv* env, jobject thiz) { |
| return get_number_from_other_library("libsplitapp_number_proxy.so", "get_number_a"); |
| } |
| |
| static jint get_number_b_via_proxy(JNIEnv* env, jobject thiz) { |
| return get_number_from_other_library("libsplitapp_number_proxy.so", "get_number_b"); |
| } |
| |
| static jint get_number_a_from_provider(JNIEnv* env, jobject thiz) { |
| return get_number_from_other_library("libsplitapp_number_provider_a.so", "get_number"); |
| } |
| |
| static jint get_number_b_from_provider(JNIEnv* env, jobject thiz) { |
| return get_number_from_other_library("libsplitapp_number_provider_b.so", "get_number"); |
| } |
| |
| static const char* classPathName = "com/android/cts/isolatedsplitapp/Native"; |
| |
| static JNINativeMethod methods[] = { |
| {"add", "(II)I", reinterpret_cast<void*>(add)}, |
| {"getNumberAViaProxy", "()I", reinterpret_cast<void**>(get_number_a_via_proxy)}, |
| {"getNumberBViaProxy", "()I", reinterpret_cast<void**>(get_number_b_via_proxy)}, |
| {"getNumberADirectly", "()I", reinterpret_cast<void**>(get_number_a_from_provider)}, |
| {"getNumberBDirectly", "()I", reinterpret_cast<void**>(get_number_b_from_provider)}, |
| }; |
| |
| static int registerNativeMethods(JNIEnv* env, const char* className, JNINativeMethod* gMethods, |
| int numMethods) { |
| jclass clazz; |
| |
| clazz = env->FindClass(className); |
| if (clazz == NULL) { |
| LOGE("Native registration unable to find class '%s'", className); |
| return JNI_FALSE; |
| } |
| if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) { |
| LOGE("RegisterNatives failed for '%s'", className); |
| return JNI_FALSE; |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| static int registerNatives(JNIEnv* env) { |
| if (!registerNativeMethods(env, classPathName, methods, sizeof(methods) / sizeof(methods[0]))) { |
| return JNI_FALSE; |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| jint JNI_OnLoad(JavaVM* vm, void* reserved) { |
| JNIEnv* env = NULL; |
| |
| LOGI("JNI_OnLoad %s", classPathName); |
| |
| if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) { |
| LOGE("ERROR: GetEnv failed"); |
| return JNI_ERR; |
| } |
| |
| if (registerNatives(env) != JNI_TRUE) { |
| LOGE("ERROR: registerNatives failed"); |
| return JNI_ERR; |
| } |
| |
| return JNI_VERSION_1_6; |
| } |