blob: 62bfea1dea1ce61e338347b237bff92beec3a82b [file] [log] [blame]
Nicolas Geoffrayd9309292015-10-31 22:21:31 +00001/*
2 * Copyright (C) 2015 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
17import java.lang.reflect.Field;
18import java.lang.reflect.Method;
19import java.util.List;
20import p1.InP1;
21import p1.PlaceHolder;
22
23
24// Custom class loader to prevent loading while verifying.
25class MyClassLoader extends ClassLoader {
26 MyClassLoader() throws Exception {
27 super(MyClassLoader.class.getClassLoader());
28
29 // Some magic to get access to the pathList field of BaseDexClassLoader.
30 ClassLoader loader = getClass().getClassLoader();
31 Class<?> baseDexClassLoader = loader.getClass().getSuperclass();
32 Field f = baseDexClassLoader.getDeclaredField("pathList");
33 f.setAccessible(true);
34 Object pathList = f.get(loader);
35
36 // Some magic to get access to the dexField field of pathList.
37 f = pathList.getClass().getDeclaredField("dexElements");
38 f.setAccessible(true);
39 dexElements = (Object[]) f.get(pathList);
40 dexFileField = dexElements[0].getClass().getDeclaredField("dexFile");
41 dexFileField.setAccessible(true);
42 }
43
44 Object[] dexElements;
45 Field dexFileField;
46
47 protected Class<?> loadClass(String className, boolean resolve) throws ClassNotFoundException {
48 if (className.equals("p1.OtherInP1") && !p1.PlaceHolder.entered) {
49 // The request comes from the verifier. Return null to get the access check entry
50 // point in the compiled code.
51 return null;
52 }
53 // Mimic what DexPathList.findClass is doing.
54 try {
55 for (Object element : dexElements) {
56 Object dex = dexFileField.get(element);
57 Method method = dex.getClass().getDeclaredMethod(
58 "loadClassBinaryName", String.class, ClassLoader.class, List.class);
59
60 if (dex != null) {
Andreas Gampe166aaee2016-07-18 08:27:23 -070061 Class<?> clazz = (Class<?>)method.invoke(dex, className, this, null);
Nicolas Geoffrayd9309292015-10-31 22:21:31 +000062 if (clazz != null) {
63 return clazz;
64 }
65 }
66 }
67 } catch (Exception e) { /* Ignore */ }
68 return getParent().loadClass(className);
69 }
70}
71
72public class Main {
73 public static void main(String[] args) throws Exception {
74 MyClassLoader o = new MyClassLoader();
Andreas Gampe166aaee2016-07-18 08:27:23 -070075 Class<?> foo = o.loadClass("LoadedByMyClassLoader");
Nicolas Geoffrayd9309292015-10-31 22:21:31 +000076 Method m = foo.getDeclaredMethod("main");
77 m.invoke(null);
78 }
79}
80
81class LoadedByMyClassLoader {
82 public static void main() throws Exception {
83 for (int i = 0; i < 10000; ++i) {
84 // Warm up the JIT.
85 doTheCall(i);
86 }
87 // Sleep a while to let the JIT compile things.
88 // TODO(ngeoffray): Remove the sleep. b/25414532
89 Thread.sleep(2000);
90 doTheCall(10001);
91 }
92
93 public static void doTheCall(int i) {
94 InP1.$inline$AllocateOtherInP1(i);
95 InP1.$inline$AllocateArrayOtherInP1(i);
96 InP1.$inline$UseStaticFieldOtherInP1(i);
97 InP1.$inline$SetStaticFieldOtherInP1(i);
98 InP1.$inline$UseInstanceFieldOtherInP1(i);
99 InP1.$inline$SetInstanceFieldOtherInP1(i);
100 InP1.$inline$LoadOtherInP1(i);
101 InP1.$inline$StaticCallOtherInP1(i);
102 InP1.$inline$InstanceCallOtherInP1(i);
103 }
104}