45 lines
1.7 KiB
Java
45 lines
1.7 KiB
Java
/*
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* Copyright (C) 2021 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 dalvik.system.PathClassLoader;
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public class Main {
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static String DEX_FILE = System.getenv("DEX_LOCATION") + "/833-background-verification.jar";
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static String DEX_FILE_EX = System.getenv("DEX_LOCATION") + "/833-background-verification-ex.jar";
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public static void main(String[] args) throws Exception {
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runTest(new UnknownLoader(DEX_FILE_EX));
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runTest(new PathClassLoader(DEX_FILE_EX, new UnknownLoader(DEX_FILE)));
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}
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public static void runTest(ClassLoader loader) throws Exception {
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// Use the class that will be verified the last by the background verifier. This maximises our
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// chance of hitting the race. We load it now so that the background verifier can also load
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// it.
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Class<?> clsa = loader.loadClass("Classa");
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Class<?> cls1 = Class.forName("Class1", true, loader);
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// Give some time for the background verification to verify "Classa".
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Thread.sleep(1000);
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clsa.newInstance();
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}
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}
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class UnknownLoader extends PathClassLoader {
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public UnknownLoader(String dexFile) {
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super(dexFile, Object.class.getClassLoader());
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}
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}
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