Nicolas Geoffray | d930929 | 2015-10-31 22:21:31 +0000 | [diff] [blame] | 1 | /* |
| 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 | |
| 17 | import java.lang.reflect.Field; |
| 18 | import java.lang.reflect.Method; |
| 19 | import java.util.List; |
| 20 | import p1.InP1; |
| 21 | import p1.PlaceHolder; |
| 22 | |
| 23 | |
| 24 | // Custom class loader to prevent loading while verifying. |
| 25 | class 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 Gampe | 166aaee | 2016-07-18 08:27:23 -0700 | [diff] [blame] | 61 | Class<?> clazz = (Class<?>)method.invoke(dex, className, this, null); |
Nicolas Geoffray | d930929 | 2015-10-31 22:21:31 +0000 | [diff] [blame] | 62 | if (clazz != null) { |
| 63 | return clazz; |
| 64 | } |
| 65 | } |
| 66 | } |
| 67 | } catch (Exception e) { /* Ignore */ } |
| 68 | return getParent().loadClass(className); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | public class Main { |
| 73 | public static void main(String[] args) throws Exception { |
| 74 | MyClassLoader o = new MyClassLoader(); |
Andreas Gampe | 166aaee | 2016-07-18 08:27:23 -0700 | [diff] [blame] | 75 | Class<?> foo = o.loadClass("LoadedByMyClassLoader"); |
Nicolas Geoffray | d930929 | 2015-10-31 22:21:31 +0000 | [diff] [blame] | 76 | Method m = foo.getDeclaredMethod("main"); |
| 77 | m.invoke(null); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | class 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 | } |