/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.lang.reflect.Constructor;
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public class Main {
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static final String DEX_FILE =
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System.getenv("DEX_LOCATION") + "/661-classloader-allocator-ex.jar";
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static final String LIBRARY_SEARCH_PATH = System.getProperty("java.library.path");
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private static void doUnloading() {
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// Stop the JIT to ensure its threads and work queue are not keeping classes
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// artifically alive.
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stopJit();
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// Do multiple GCs to prevent rare flakiness if some other thread is keeping the
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// classloader live.
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for (int i = 0; i < 5; ++i) {
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Runtime.getRuntime().gc();
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}
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startJit();
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}
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public static void main(String[] args) throws Exception {
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System.loadLibrary(args[0]);
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loadClass();
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doUnloading();
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// fetchProfiles iterate over the ProfilingInfo, we used to crash in the presence
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// of unloaded copied methods.
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fetchProfiles();
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}
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public static void loadClass() throws Exception {
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Class<?> pathClassLoader = Class.forName("dalvik.system.PathClassLoader");
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if (pathClassLoader == null) {
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throw new AssertionError("Couldn't find path class loader class");
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}
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Constructor<?> constructor =
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pathClassLoader.getDeclaredConstructor(String.class, String.class, ClassLoader.class);
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ClassLoader loader = (ClassLoader) constructor.newInstance(
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DEX_FILE, LIBRARY_SEARCH_PATH, ClassLoader.getSystemClassLoader());
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Class<?> otherClass = loader.loadClass("p1.OtherClass");
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ensureJitCompiled(otherClass, "foo");
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}
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public static native void ensureJitCompiled(Class<?> cls, String methodName);
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public static native void fetchProfiles();
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public static native void stopJit();
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public static native void startJit();
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}
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