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1 /*
2  * Copyright (C) 2016 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 package art;
18 
19 import java.util.Base64;
20 import java.util.concurrent.Semaphore;
21 
22 public class Test951 {
23 
24   static class Transform {
sayHi(Runnable r)25     public void sayHi(Runnable r) {
26       System.out.println("hello");
27       r.run();
28       System.out.println("goodbye");
29     }
30   }
31 
32   // static class Transform {
33   //   public void sayHi(Runnable r) {
34   //     System.out.println("Hello - Transformed");
35   //     r.run();
36   //     System.out.println("Goodbye - Transformed");
37   //   }
38   // }
39   private static final byte[] CLASS_BYTES = Base64.getDecoder().decode(
40     "yv66vgAAADQAKAoACAARCQASABMIABQKABUAFgsAFwAYCAAZBwAbBwAeAQAGPGluaXQ+AQADKClW" +
41     "AQAEQ29kZQEAD0xpbmVOdW1iZXJUYWJsZQEABXNheUhpAQAXKExqYXZhL2xhbmcvUnVubmFibGU7" +
42     "KVYBAApTb3VyY2VGaWxlAQAMVGVzdDk1MS5qYXZhDAAJAAoHAB8MACAAIQEAE0hlbGxvIC0gVHJh" +
43     "bnNmb3JtZWQHACIMACMAJAcAJQwAJgAKAQAVR29vZGJ5ZSAtIFRyYW5zZm9ybWVkBwAnAQAVYXJ0" +
44     "L1Rlc3Q5NTEkVHJhbnNmb3JtAQAJVHJhbnNmb3JtAQAMSW5uZXJDbGFzc2VzAQAQamF2YS9sYW5n" +
45     "L09iamVjdAEAEGphdmEvbGFuZy9TeXN0ZW0BAANvdXQBABVMamF2YS9pby9QcmludFN0cmVhbTsB" +
46     "ABNqYXZhL2lvL1ByaW50U3RyZWFtAQAHcHJpbnRsbgEAFShMamF2YS9sYW5nL1N0cmluZzspVgEA" +
47     "EmphdmEvbGFuZy9SdW5uYWJsZQEAA3J1bgEAC2FydC9UZXN0OTUxACAABwAIAAAAAAACAAAACQAK" +
48     "AAEACwAAAB0AAQABAAAABSq3AAGxAAAAAQAMAAAABgABAAAABQABAA0ADgABAAsAAAA7AAIAAgAA" +
49     "ABeyAAISA7YABCu5AAUBALIAAhIGtgAEsQAAAAEADAAAABIABAAAAAcACAAIAA4ACQAWAAoAAgAP" +
50     "AAAAAgAQAB0AAAAKAAEABwAaABwACA==");
51   private static final byte[] DEX_BYTES = Base64.getDecoder().decode(
52     "ZGV4CjAzNQBom/JeAAAAAAAAAAAAAAAAAAAAAAAAAAA8BAAAcAAAAHhWNBIAAAAAAAAAAHgDAAAX" +
53     "AAAAcAAAAAoAAADMAAAAAwAAAPQAAAABAAAAGAEAAAUAAAAgAQAAAQAAAEgBAADUAgAAaAEAAGgB" +
54     "AABwAQAAhwEAAJwBAAC1AQAAxAEAAOgBAAAIAgAAHwIAADMCAABJAgAAXQIAAHECAAB/AgAAigIA" +
55     "AI0CAACRAgAAngIAAKQCAACpAgAAsgIAALcCAAC+AgAAAwAAAAQAAAAFAAAABgAAAAcAAAAIAAAA" +
56     "CQAAAAoAAAALAAAADgAAAA4AAAAJAAAAAAAAAA8AAAAJAAAAyAIAAA8AAAAJAAAA0AIAAAgABAAS" +
57     "AAAAAAAAAAAAAAAAAAEAFQAAAAQAAgATAAAABQAAAAAAAAAGAAAAFAAAAAAAAAAAAAAABQAAAAAA" +
58     "AAAMAAAAaAMAADwDAAAAAAAABjxpbml0PgAVR29vZGJ5ZSAtIFRyYW5zZm9ybWVkABNIZWxsbyAt" +
59     "IFRyYW5zZm9ybWVkABdMYXJ0L1Rlc3Q5NTEkVHJhbnNmb3JtOwANTGFydC9UZXN0OTUxOwAiTGRh" +
60     "bHZpay9hbm5vdGF0aW9uL0VuY2xvc2luZ0NsYXNzOwAeTGRhbHZpay9hbm5vdGF0aW9uL0lubmVy" +
61     "Q2xhc3M7ABVMamF2YS9pby9QcmludFN0cmVhbTsAEkxqYXZhL2xhbmcvT2JqZWN0OwAUTGphdmEv" +
62     "bGFuZy9SdW5uYWJsZTsAEkxqYXZhL2xhbmcvU3RyaW5nOwASTGphdmEvbGFuZy9TeXN0ZW07AAxU" +
63     "ZXN0OTUxLmphdmEACVRyYW5zZm9ybQABVgACVkwAC2FjY2Vzc0ZsYWdzAARuYW1lAANvdXQAB3By" +
64     "aW50bG4AA3J1bgAFc2F5SGkABXZhbHVlAAAAAAEAAAAGAAAAAQAAAAcAAAAFAAcOAAcBAAcOAQgP" +
65     "AQMPAQgPAAEAAQABAAAA2AIAAAQAAABwEAMAAAAOAAQAAgACAAAA3QIAABQAAABiAAAAGwECAAAA" +
66     "biACABAAchAEAAMAYgAAABsBAQAAAG4gAgAQAA4AAAABAQCAgATsBQEBhAYAAAICARYYAQIDAhAE" +
67     "CBEXDQACAAAATAMAAFIDAABcAwAAAAAAAAAAAAAAAAAAEAAAAAAAAAABAAAAAAAAAAEAAAAXAAAA" +
68     "cAAAAAIAAAAKAAAAzAAAAAMAAAADAAAA9AAAAAQAAAABAAAAGAEAAAUAAAAFAAAAIAEAAAYAAAAB" +
69     "AAAASAEAAAIgAAAXAAAAaAEAAAEQAAACAAAAyAIAAAMgAAACAAAA2AIAAAEgAAACAAAA7AIAAAAg" +
70     "AAABAAAAPAMAAAQgAAACAAAATAMAAAMQAAABAAAAXAMAAAYgAAABAAAAaAMAAAAQAAABAAAAeAMA" +
71     "AA==");
72 
run()73   public static void run() {
74     // Semaphores to let each thread know where the other is. We could use barriers but semaphores
75     // mean we don't need to have the worker thread be waiting around.
76     final Semaphore sem_redefine_start = new Semaphore(0);
77     final Semaphore sem_redefine_end = new Semaphore(0);
78     // Create a thread to do the actual redefinition. We will just communicate through an
79     // atomic-integer.
80     new Thread(() -> {
81       try {
82         // Wait for the other thread to ask for redefinition.
83         sem_redefine_start.acquire();
84         // Do the redefinition.
85         Redefinition.doCommonClassRedefinition(Transform.class, CLASS_BYTES, DEX_BYTES);
86         // Allow the other thread to wake up if it is waiting.
87         sem_redefine_end.release();
88       } catch (InterruptedException e) {
89         throw new Error("unable to do redefinition", e);
90       }
91     }).start();
92 
93     Transform t = new Transform();
94     t.sayHi(() -> { System.out.println("Not doing anything here"); });
95     t.sayHi(() -> {
96       try {
97         System.out.println("transforming calling function");
98         // Wake up the waiting thread.
99         sem_redefine_start.release();
100         // Wait for the other thread to finish with redefinition.
101         sem_redefine_end.acquire();
102       } catch (InterruptedException e) {
103         throw new Error("unable to do redefinition", e);
104       }
105     });
106     t.sayHi(() -> { System.out.println("Not doing anything here"); });
107   }
108 }
109