1 /*
2  * Copyright (C) 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 import java.io.File;
18 import java.lang.reflect.Constructor;
19 import java.lang.reflect.Method;
20 
21 final class Main {
main(String[] args)22   public static void main(String[] args) throws Exception {
23     System.loadLibrary(args[0]);
24     MyLocalClass.callMethod();
25     pkg1.SubClass.callMethod();
26     loadClass();
27   }
28 
loadClass()29   public static void loadClass() throws Exception {
30     Class<?> pathClassLoader = Class.forName("dalvik.system.PathClassLoader");
31     if (pathClassLoader == null) {
32       throw new AssertionError("Couldn't find path class loader class");
33     }
34     Constructor<?> constructor =
35        pathClassLoader.getDeclaredConstructor(String.class, String.class, ClassLoader.class);
36     ClassLoader loader = (ClassLoader) constructor.newInstance(
37         DEX_FILE, LIBRARY_SEARCH_PATH, ClassLoader.getSystemClassLoader());
38     Class<?> otherClass = loader.loadClass("Caller");
39 
40     // Run the method in interpreter / AOT mode.
41     otherClass.getMethod("doCall").invoke(null);
42 
43     // Run the method  in JIT mode.
44     ensureJitCompiled(otherClass, "doCall");
45     otherClass.getMethod("doCall").invoke(null);
46   }
47 
48   private static final String LIBRARY_SEARCH_PATH = System.getProperty("java.library.path");
49   private static final String DEX_LOCATION = System.getenv("DEX_LOCATION");
50   private static final String DEX_FILE =
51       new File(DEX_LOCATION, "827-resolve-method-ex.jar").getAbsolutePath();
52 
ensureJitCompiled(Class<?> cls, String methodName)53   private static native void ensureJitCompiled(Class<?> cls, String methodName);
54 }
55 
56 class MyLocalClass extends pkg1.SubClass {
57 }
58