1*795d594fSAndroid Build Coastguard Worker /* 2*795d594fSAndroid Build Coastguard Worker * Copyright (C) 2015 The Android Open Source Project 3*795d594fSAndroid Build Coastguard Worker * 4*795d594fSAndroid Build Coastguard Worker * Licensed under the Apache License, Version 2.0 (the "License"); 5*795d594fSAndroid Build Coastguard Worker * you may not use this file except in compliance with the License. 6*795d594fSAndroid Build Coastguard Worker * You may obtain a copy of the License at 7*795d594fSAndroid Build Coastguard Worker * 8*795d594fSAndroid Build Coastguard Worker * http://www.apache.org/licenses/LICENSE-2.0 9*795d594fSAndroid Build Coastguard Worker * 10*795d594fSAndroid Build Coastguard Worker * Unless required by applicable law or agreed to in writing, software 11*795d594fSAndroid Build Coastguard Worker * distributed under the License is distributed on an "AS IS" BASIS, 12*795d594fSAndroid Build Coastguard Worker * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*795d594fSAndroid Build Coastguard Worker * See the License for the specific language governing permissions and 14*795d594fSAndroid Build Coastguard Worker * limitations under the License. 15*795d594fSAndroid Build Coastguard Worker */ 16*795d594fSAndroid Build Coastguard Worker 17*795d594fSAndroid Build Coastguard Worker import java.lang.reflect.Field; 18*795d594fSAndroid Build Coastguard Worker import java.lang.reflect.Method; 19*795d594fSAndroid Build Coastguard Worker import java.util.List; 20*795d594fSAndroid Build Coastguard Worker import p1.InP1; 21*795d594fSAndroid Build Coastguard Worker import p1.PlaceHolder; 22*795d594fSAndroid Build Coastguard Worker 23*795d594fSAndroid Build Coastguard Worker 24*795d594fSAndroid Build Coastguard Worker // Custom class loader to prevent loading while verifying. 25*795d594fSAndroid Build Coastguard Worker class MyClassLoader extends ClassLoader { MyClassLoader()26*795d594fSAndroid Build Coastguard Worker MyClassLoader() throws Exception { 27*795d594fSAndroid Build Coastguard Worker super(MyClassLoader.class.getClassLoader()); 28*795d594fSAndroid Build Coastguard Worker 29*795d594fSAndroid Build Coastguard Worker // Some magic to get access to the pathList field of BaseDexClassLoader. 30*795d594fSAndroid Build Coastguard Worker ClassLoader loader = getClass().getClassLoader(); 31*795d594fSAndroid Build Coastguard Worker Class<?> baseDexClassLoader = loader.getClass().getSuperclass(); 32*795d594fSAndroid Build Coastguard Worker Field f = baseDexClassLoader.getDeclaredField("pathList"); 33*795d594fSAndroid Build Coastguard Worker f.setAccessible(true); 34*795d594fSAndroid Build Coastguard Worker Object pathList = f.get(loader); 35*795d594fSAndroid Build Coastguard Worker 36*795d594fSAndroid Build Coastguard Worker // Some magic to get access to the dexField field of pathList. 37*795d594fSAndroid Build Coastguard Worker f = pathList.getClass().getDeclaredField("dexElements"); 38*795d594fSAndroid Build Coastguard Worker f.setAccessible(true); 39*795d594fSAndroid Build Coastguard Worker dexElements = (Object[]) f.get(pathList); 40*795d594fSAndroid Build Coastguard Worker dexFileField = dexElements[0].getClass().getDeclaredField("dexFile"); 41*795d594fSAndroid Build Coastguard Worker dexFileField.setAccessible(true); 42*795d594fSAndroid Build Coastguard Worker } 43*795d594fSAndroid Build Coastguard Worker 44*795d594fSAndroid Build Coastguard Worker Object[] dexElements; 45*795d594fSAndroid Build Coastguard Worker Field dexFileField; 46*795d594fSAndroid Build Coastguard Worker loadClass(String className, boolean resolve)47*795d594fSAndroid Build Coastguard Worker protected Class<?> loadClass(String className, boolean resolve) throws ClassNotFoundException { 48*795d594fSAndroid Build Coastguard Worker if (className.equals("p1.OtherInP1") && !p1.PlaceHolder.entered) { 49*795d594fSAndroid Build Coastguard Worker // The request comes from the verifier. Return null to get the access check entry 50*795d594fSAndroid Build Coastguard Worker // point in the compiled code. 51*795d594fSAndroid Build Coastguard Worker return null; 52*795d594fSAndroid Build Coastguard Worker } 53*795d594fSAndroid Build Coastguard Worker // Mimic what DexPathList.findClass is doing. 54*795d594fSAndroid Build Coastguard Worker try { 55*795d594fSAndroid Build Coastguard Worker for (Object element : dexElements) { 56*795d594fSAndroid Build Coastguard Worker Object dex = dexFileField.get(element); 57*795d594fSAndroid Build Coastguard Worker Method method = dex.getClass().getDeclaredMethod( 58*795d594fSAndroid Build Coastguard Worker "loadClassBinaryName", String.class, ClassLoader.class, List.class); 59*795d594fSAndroid Build Coastguard Worker 60*795d594fSAndroid Build Coastguard Worker if (dex != null) { 61*795d594fSAndroid Build Coastguard Worker Class<?> clazz = (Class<?>)method.invoke(dex, className, this, null); 62*795d594fSAndroid Build Coastguard Worker if (clazz != null) { 63*795d594fSAndroid Build Coastguard Worker return clazz; 64*795d594fSAndroid Build Coastguard Worker } 65*795d594fSAndroid Build Coastguard Worker } 66*795d594fSAndroid Build Coastguard Worker } 67*795d594fSAndroid Build Coastguard Worker } catch (Exception e) { /* Ignore */ } 68*795d594fSAndroid Build Coastguard Worker return getParent().loadClass(className); 69*795d594fSAndroid Build Coastguard Worker } 70*795d594fSAndroid Build Coastguard Worker } 71*795d594fSAndroid Build Coastguard Worker 72*795d594fSAndroid Build Coastguard Worker public class Main { main(String[] args)73*795d594fSAndroid Build Coastguard Worker public static void main(String[] args) throws Exception { 74*795d594fSAndroid Build Coastguard Worker MyClassLoader o = new MyClassLoader(); 75*795d594fSAndroid Build Coastguard Worker Class<?> foo = o.loadClass("LoadedByMyClassLoader"); 76*795d594fSAndroid Build Coastguard Worker Method m = foo.getDeclaredMethod("main"); 77*795d594fSAndroid Build Coastguard Worker m.invoke(null); 78*795d594fSAndroid Build Coastguard Worker } 79*795d594fSAndroid Build Coastguard Worker } 80*795d594fSAndroid Build Coastguard Worker 81*795d594fSAndroid Build Coastguard Worker class LoadedByMyClassLoader { main()82*795d594fSAndroid Build Coastguard Worker public static void main() throws Exception { 83*795d594fSAndroid Build Coastguard Worker for (int i = 0; i < 10000; ++i) { 84*795d594fSAndroid Build Coastguard Worker // Warm up the JIT. 85*795d594fSAndroid Build Coastguard Worker doTheCall(i); 86*795d594fSAndroid Build Coastguard Worker } 87*795d594fSAndroid Build Coastguard Worker // Sleep a while to let the JIT compile things. 88*795d594fSAndroid Build Coastguard Worker // TODO(ngeoffray): Remove the sleep. b/25414532 89*795d594fSAndroid Build Coastguard Worker Thread.sleep(2000); 90*795d594fSAndroid Build Coastguard Worker doTheCall(10001); 91*795d594fSAndroid Build Coastguard Worker } 92*795d594fSAndroid Build Coastguard Worker doTheCall(int i)93*795d594fSAndroid Build Coastguard Worker public static void doTheCall(int i) { 94*795d594fSAndroid Build Coastguard Worker InP1.$inline$AllocateOtherInP1(i); 95*795d594fSAndroid Build Coastguard Worker InP1.$inline$AllocateArrayOtherInP1(i); 96*795d594fSAndroid Build Coastguard Worker InP1.$inline$UseStaticFieldOtherInP1(i); 97*795d594fSAndroid Build Coastguard Worker InP1.$inline$SetStaticFieldOtherInP1(i); 98*795d594fSAndroid Build Coastguard Worker InP1.$inline$UseInstanceFieldOtherInP1(i); 99*795d594fSAndroid Build Coastguard Worker InP1.$inline$SetInstanceFieldOtherInP1(i); 100*795d594fSAndroid Build Coastguard Worker InP1.$inline$LoadOtherInP1(i); 101*795d594fSAndroid Build Coastguard Worker InP1.$inline$StaticCallOtherInP1(i); 102*795d594fSAndroid Build Coastguard Worker InP1.$inline$InstanceCallOtherInP1(i); 103*795d594fSAndroid Build Coastguard Worker } 104*795d594fSAndroid Build Coastguard Worker } 105