77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
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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 dalvik.system.InMemoryDexClassLoader;
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import java.io.InputStream;
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import java.lang.reflect.Method;
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import java.nio.ByteBuffer;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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public class Main {
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public static void main(String[] args) throws Exception {
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// Extract Dex file contents from the secondary Jar file.
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String jarFilename =
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System.getenv("DEX_LOCATION") + "/656-annotation-lookup-generic-jni-ex.jar";
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ZipFile zipFile = new ZipFile(jarFilename);
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ZipEntry zipEntry = zipFile.getEntry("classes.dex");
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InputStream inputStream = zipFile.getInputStream(zipEntry);
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int dexFileSize = (int) zipEntry.getSize();
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byte[] dexFileContents = new byte[dexFileSize];
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inputStream.read(dexFileContents, 0, dexFileSize);
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// Create class loader from secondary Dex file.
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ByteBuffer dexBuffer = ByteBuffer.wrap(dexFileContents);
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ClassLoader classLoader = createUnquickenedDexClassLoader(dexBuffer);
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// Load and initialize the Test class.
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Class<?> testClass = classLoader.loadClass("Test");
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Method initialize = testClass.getMethod("initialize", String.class);
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initialize.invoke(null, args[0]);
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// Invoke Test.nativeMethodWithAnnotation().
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Method nativeMethodWithAnnotation = testClass.getMethod("nativeMethodWithAnnotation");
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// Invoking the native method Test.nativeMethodWithAnnotation used
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// to crash the Generic JNI trampoline during the resolution of
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// the method's annotations (SampleAnnotation) (see b/38454151).
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nativeMethodWithAnnotation.invoke(null);
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zipFile.close();
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System.out.println("passed");
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}
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// Create a class loader loading a Dex file in memory
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// *without creating an Oat file*. This way, the Dex file won't be
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// quickened and JNI stubs won't be compiled, thus forcing the use
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// of Generic JNI when invoking the native method
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// Test.nativeMethodWithAnnotation.
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static ClassLoader createUnquickenedDexClassLoader(ByteBuffer dexBuffer) {
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InMemoryDexClassLoader cl = new InMemoryDexClassLoader(dexBuffer, getBootClassLoader());
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return cl;
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}
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static ClassLoader getBootClassLoader() {
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ClassLoader cl = Main.class.getClassLoader();
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while (cl.getParent() != null) {
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cl = cl.getParent();
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}
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return cl;
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}
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}
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