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/*
* 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;
import p1.InP1;
import p1.PlaceHolder;
// Custom class loader to prevent loading while verifying.
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 {
if (className.equals("p1.OtherInP1") && !p1.PlaceHolder.entered) {
// The request comes from the verifier. Return null to get the access check entry
// point in the compiled code.
return null;
}
// 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 getParent().loadClass(className);
}
}
public class Main {
public static void main(String[] args) throws Exception {
MyClassLoader o = new MyClassLoader();
Class<?> foo = o.loadClass("LoadedByMyClassLoader");
Method m = foo.getDeclaredMethod("main");
m.invoke(null);
}
}
class LoadedByMyClassLoader {
public static void main() throws Exception {
for (int i = 0; i < 10000; ++i) {
// Warm up the JIT.
doTheCall(i);
}
// Sleep a while to let the JIT compile things.
// TODO(ngeoffray): Remove the sleep. b/25414532
Thread.sleep(2000);
doTheCall(10001);
}
public static void doTheCall(int i) {
InP1.$inline$AllocateOtherInP1(i);
InP1.$inline$AllocateArrayOtherInP1(i);
InP1.$inline$UseStaticFieldOtherInP1(i);
InP1.$inline$SetStaticFieldOtherInP1(i);
InP1.$inline$UseInstanceFieldOtherInP1(i);
InP1.$inline$SetInstanceFieldOtherInP1(i);
InP1.$inline$LoadOtherInP1(i);
InP1.$inline$StaticCallOtherInP1(i);
InP1.$inline$InstanceCallOtherInP1(i);
}
}
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