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/*
* Copyright (C) 2021 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 dalvik.system.PathClassLoader;
import java.io.File;
import java.lang.reflect.Method;
import java.nio.file.Files;
import java.util.Arrays;
public class Main {
public static void main(String[] args) throws Exception {
System.loadLibrary(args[0]);
// Enable hidden API checks in case they are disabled by default.
init();
// Put the classes with hiddenapi bits in the boot classpath.
appendToBootClassLoader(DEX_PARENT_BOOT, /* isCorePlatform */ false);
// Create a new class loader so the TestCase class sees the InheritAbstract classes in the boot
// classpath.
ClassLoader childLoader = new PathClassLoader(DEX_CHILD, Object.class.getClassLoader());
Class<?> cls = Class.forName("TestCase", true, childLoader);
Method m = cls.getDeclaredMethod("test");
m.invoke(null);
// Create a new native library which 'childLoader' can load.
String absoluteLibraryPath = getNativeLibFileName(args[0]);
// Do the test for JNI code.
m = cls.getDeclaredMethod("testNative", String.class);
m.invoke(null, createNativeLibCopy(absoluteLibraryPath));
}
// Tries to find the absolute path of the native library whose basename is 'arg'.
private static String getNativeLibFileName(String arg) throws Exception {
String libName = System.mapLibraryName(arg);
Method libPathsMethod = Runtime.class.getDeclaredMethod("getLibPaths");
libPathsMethod.setAccessible(true);
String[] libPaths = (String[]) libPathsMethod.invoke(Runtime.getRuntime());
String nativeLibFileName = null;
for (String p : libPaths) {
String candidate = p + libName;
if (new File(candidate).exists()) {
nativeLibFileName = candidate;
break;
}
}
if (nativeLibFileName == null) {
throw new IllegalStateException("Didn't find " + libName + " in " +
Arrays.toString(libPaths));
}
return nativeLibFileName;
}
// Copy native library to a new file with a unique name so it does not
// conflict with other loaded instance of the same binary file.
private static String createNativeLibCopy(String nativeLibFileName) throws Exception {
String tempFileName = System.mapLibraryName("hiddenapitest");
File tempFile = new File(System.getenv("DEX_LOCATION"), tempFileName);
Files.copy(new File(nativeLibFileName).toPath(), tempFile.toPath());
return tempFile.getAbsolutePath();
}
private static final String DEX_PARENT_BOOT =
new File(new File(System.getenv("DEX_LOCATION"), "res"), "boot.jar").getAbsolutePath();
private static final String DEX_CHILD =
new File(System.getenv("DEX_LOCATION"), "817-hiddenapi-ex.jar").getAbsolutePath();
private static native int appendToBootClassLoader(String dexPath, boolean isCorePlatform);
private static native void init();
}