| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.util.List; |
| |
| class MyClassLoader extends ClassLoader { |
| MyClassLoader() throws Exception { |
| super(MyClassLoader.class.getClassLoader()); |
| |
| // Some magic to get access to the pathList field of BaseDexClassLoader. |
| ClassLoader loader = getClass().getClassLoader(); |
| Class<?> baseDexClassLoader = loader.getClass().getSuperclass(); |
| Field f = baseDexClassLoader.getDeclaredField("pathList"); |
| f.setAccessible(true); |
| Object pathList = f.get(loader); |
| |
| // Some magic to get access to the dexField field of pathList. |
| f = pathList.getClass().getDeclaredField("dexElements"); |
| f.setAccessible(true); |
| dexElements = (Object[]) f.get(pathList); |
| dexFileField = dexElements[0].getClass().getDeclaredField("dexFile"); |
| dexFileField.setAccessible(true); |
| } |
| |
| Object[] dexElements; |
| Field dexFileField; |
| |
| protected Class<?> loadClass(String className, boolean resolve) throws ClassNotFoundException { |
| System.out.println("Request for " + className); |
| |
| // We're only going to handle LoadedByMyClassLoader. |
| if (className != "LoadedByMyClassLoader") { |
| return getParent().loadClass(className); |
| } |
| |
| // Mimic what DexPathList.findClass is doing. |
| try { |
| for (Object element : dexElements) { |
| Object dex = dexFileField.get(element); |
| Method method = dex.getClass().getDeclaredMethod( |
| "loadClassBinaryName", String.class, ClassLoader.class, List.class); |
| |
| if (dex != null) { |
| Class clazz = (Class)method.invoke(dex, className, this, null); |
| if (clazz != null) { |
| return clazz; |
| } |
| } |
| } |
| } catch (Exception e) { /* Ignore */ } |
| return null; |
| } |
| } |
| |
| class LoadedByMyClassLoader { |
| /// CHECK-START: void LoadedByMyClassLoader.bar() inliner (before) |
| /// CHECK: LoadClass |
| /// CHECK-NEXT: ClinitCheck |
| /// CHECK-NEXT: InvokeStaticOrDirect |
| /// CHECK-NEXT: LoadClass |
| /// CHECK-NEXT: ClinitCheck |
| /// CHECK-NEXT: StaticFieldGet |
| /// CHECK-NEXT: LoadString |
| /// CHECK-NEXT: NullCheck |
| /// CHECK-NEXT: InvokeVirtual |
| |
| /// CHECK-START: void LoadedByMyClassLoader.bar() inliner (after) |
| /// CHECK: LoadClass |
| /// CHECK-NEXT: ClinitCheck |
| /* We inlined Main.$inline$bar */ |
| /// CHECK-NEXT: LoadClass |
| /// CHECK-NEXT: ClinitCheck |
| /// CHECK-NEXT: StaticFieldGet |
| /// CHECK-NEXT: LoadString |
| /// CHECK-NEXT: NullCheck |
| /// CHECK-NEXT: InvokeVirtual |
| |
| /// CHECK-START: void LoadedByMyClassLoader.bar() register (before) |
| /* Load and initialize Main */ |
| /// CHECK: LoadClass gen_clinit_check:true |
| /* Load and initialize System */ |
| /// CHECK-NEXT: LoadClass gen_clinit_check:true |
| /// CHECK-NEXT: StaticFieldGet |
| /// CHECK-NEXT: LoadString |
| /// CHECK-NEXT: NullCheck |
| /// CHECK-NEXT: InvokeVirtual |
| public static void bar() { |
| Main.$inline$bar(); |
| System.out.println("In between the two calls."); |
| Main.$noinline$bar(); |
| } |
| } |
| |
| class Main { |
| public static void main(String[] args) throws Exception { |
| MyClassLoader o = new MyClassLoader(); |
| Class foo = o.loadClass("LoadedByMyClassLoader"); |
| Method m = foo.getDeclaredMethod("bar"); |
| m.invoke(null); |
| } |
| |
| public static void $inline$bar() { |
| } |
| |
| public static void $noinline$bar() { |
| try { |
| System.out.println("In $noinline$bar"); |
| } catch (Throwable t) { /* Ignore */ } |
| } |
| } |