xref: /aosp_15_r20/art/test/542-unresolved-access-check/src/Main.java (revision 795d594fd825385562da6b089ea9b2033f3abf5a)
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