87 lines
3.4 KiB
Java
87 lines
3.4 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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import java.io.File;
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import java.lang.reflect.Method;
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import java.nio.file.Files;
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import java.util.Arrays;
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public class Main {
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public static void main(String[] args) throws Exception {
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System.loadLibrary(args[0]);
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// Enable hidden API checks in case they are disabled by default.
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init();
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// Put the classes with hiddenapi bits in the boot classpath.
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appendToBootClassLoader(DEX_PARENT_BOOT, /* isCorePlatform */ false);
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// Create a new class loader so the TestCase class sees the InheritAbstract classes in the boot
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// classpath.
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ClassLoader childLoader = new PathClassLoader(DEX_CHILD, Object.class.getClassLoader());
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Class<?> cls = Class.forName("TestCase", true, childLoader);
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Method m = cls.getDeclaredMethod("test");
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m.invoke(null);
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// Create a new native library which 'childLoader' can load.
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String absoluteLibraryPath = getNativeLibFileName(args[0]);
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// Do the test for JNI code.
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m = cls.getDeclaredMethod("testNative", String.class);
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m.invoke(null, createNativeLibCopy(absoluteLibraryPath));
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}
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// Tries to find the absolute path of the native library whose basename is 'arg'.
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private static String getNativeLibFileName(String arg) throws Exception {
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String libName = System.mapLibraryName(arg);
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Method libPathsMethod = Runtime.class.getDeclaredMethod("getLibPaths");
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libPathsMethod.setAccessible(true);
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String[] libPaths = (String[]) libPathsMethod.invoke(Runtime.getRuntime());
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String nativeLibFileName = null;
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for (String p : libPaths) {
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String candidate = p + libName;
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if (new File(candidate).exists()) {
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nativeLibFileName = candidate;
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break;
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}
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}
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if (nativeLibFileName == null) {
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throw new IllegalStateException("Didn't find " + libName + " in " +
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Arrays.toString(libPaths));
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}
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return nativeLibFileName;
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}
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// Copy native library to a new file with a unique name so it does not
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// conflict with other loaded instance of the same binary file.
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private static String createNativeLibCopy(String nativeLibFileName) throws Exception {
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String tempFileName = System.mapLibraryName("hiddenapitest");
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File tempFile = new File(System.getenv("DEX_LOCATION"), tempFileName);
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Files.copy(new File(nativeLibFileName).toPath(), tempFile.toPath());
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return tempFile.getAbsolutePath();
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}
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private static final String DEX_PARENT_BOOT =
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new File(new File(System.getenv("DEX_LOCATION"), "res"), "boot.jar").getAbsolutePath();
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private static final String DEX_CHILD =
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new File(System.getenv("DEX_LOCATION"), "817-hiddenapi-ex.jar").getAbsolutePath();
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private static native int appendToBootClassLoader(String dexPath, boolean isCorePlatform);
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private static native void init();
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}
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