1 /*
2  * Copyright (C) 2017 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.lang.reflect.Constructor;
18 import java.lang.reflect.Method;
19 
20 public class Main {
21     public static String TEST_NAME = "164-resolution-trampoline-dex-cache";
22 
main(String[] args)23     public static void main(String[] args) {
24         // Load the test JNI for ensureJitCompiled(). Note that classes Main loaded
25         // by other class loaders do not have the binding, so we need to pass the
26         // current Main.class around and call ensureJitCompiled() via reflection.
27         System.loadLibrary(args[0]);
28         try {
29             String dex_location = System.getenv("DEX_LOCATION");
30             ClassLoader systemLoader = ClassLoader.getSystemClassLoader().getParent();
31             ClassLoader baseLoader = getClassLoaderFor(dex_location, systemLoader, /* ex */ false);
32             ClassLoader mainLoader = getClassLoaderFor(dex_location, baseLoader, /* ex */ true);
33 
34             Class<?> tc = Class.forName("MostDerived", true, mainLoader);
35             Method m = tc.getDeclaredMethod("test", Class.class);
36             m.invoke(null, Main.class);
37         } catch (Throwable t) {
38             t.printStackTrace(System.out);
39         }
40     }
41 
getClassLoaderFor(String location, ClassLoader parent, boolean ex)42     public static ClassLoader getClassLoaderFor(String location, ClassLoader parent, boolean ex)
43             throws Exception {
44         try {
45             Class<?> class_loader_class = Class.forName("dalvik.system.PathClassLoader");
46             Constructor<?> ctor =
47                     class_loader_class.getConstructor(String.class, ClassLoader.class);
48             String path = location + "/" + TEST_NAME + (ex ? "-ex.jar" : ".jar");
49             return (ClassLoader)ctor.newInstance(path, parent);
50         } catch (ClassNotFoundException e) {
51             // Running on RI. Use URLClassLoader.
52             String url = "file://" + location + (ex ? "/classes-ex/" : "/classes/");
53             return new java.net.URLClassLoader(
54                     new java.net.URL[] { new java.net.URL(url) }, parent);
55         }
56     }
57 
ensureJitCompiled(Class<?> klass, String method_name)58     public static native void ensureJitCompiled(Class<?> klass, String method_name);
59 }
60