/* * Copyright (C) 2017 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. */ import libcore.util.EmptyArray; public class Main { public static void main(String[] args) { try { // Check if we're running dalvik or RI. Class class_loader_class = Class.forName("dalvik.system.PathClassLoader"); System.loadLibrary(args[0]); } catch (ClassNotFoundException e) { usingRI = true; // Add expected JNI_OnLoad log line to match expected-stdout.txt. System.out.println("JNI_OnLoad called"); } try { // Initialize all classes needed for old java.lang.Void.TYPE initialization. Runnable.class.getMethod("run", EmptyArray.CLASS).getReturnType(); } catch (Exception e) { throw new Error(e); } // Clear the resolved types of the ojluni dex file to make sure there is no entry // for "V", i.e. void. clearResolvedTypes(Integer.class); // With java.lang.Void being compile-time verified but uninitialized, initialize // it now. Previously, this would indirectly initialize TYPE with the current, // i.e. zero-initialized, value of TYPE. The only thing that could prevent the // series of calls leading to this was a cache hit in Class.getDexCacheType() // which we have prevented by clearing the cache above. Class voidClass = void.class; System.out.println("void.class = " + voidClass); } public static void clearResolvedTypes(Class c) { if (!usingRI) { nativeClearResolvedTypes(c); } } public static native void nativeClearResolvedTypes(Class c); static boolean usingRI = false; }