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.lang.reflect.Method; 20 import java.util.Base64; 21 22 public class Test1958 { 23 static class Runner { doSayHi()24 public static String doSayHi() { 25 return sayHiHelper(true); 26 } 27 dontSayHi()28 public static String dontSayHi() { 29 return sayHiHelper(false); 30 } 31 32 // We are trying to get the definition of Transform.sayHi inlined into this function. sayHiHelper(boolean sayHi)33 public static String sayHiHelper(boolean sayHi) { 34 if (sayHi) { 35 return Transform.sayHi(); 36 } else { 37 return "NOPE!"; 38 } 39 } 40 } 41 42 static class Transform { sayHi()43 public static String sayHi() { 44 // Use lower 'h' to make sure the string will have a different string id 45 // than the transformation (the transformation code is the same except 46 // the actual printed String, which was making the test inacurately passing 47 // in JIT mode when loading the string from the dex cache, as the string ids 48 // of the two different strings were the same). 49 // We know the string ids will be different because lexicographically: 50 // "Goodbye" < "LTransform;" < "hello". 51 return "hello"; 52 } 53 } 54 55 /** 56 * base64 encoded class/dex file for 57 * static class Transform { 58 * public static String sayHi() { 59 * return "Goodbye"; 60 * } 61 * } 62 */ 63 private static final byte[] CLASS_BYTES = Base64.getDecoder().decode( 64 "yv66vgAAADUAFQoABAANCAAOBwAQBwATAQAGPGluaXQ+AQADKClWAQAEQ29kZQEAD0xpbmVOdW1i" + 65 "ZXJUYWJsZQEABXNheUhpAQAUKClMamF2YS9sYW5nL1N0cmluZzsBAApTb3VyY2VGaWxlAQANVGVz" + 66 "dDE5NTguamF2YQwABQAGAQAHR29vZGJ5ZQcAFAEAFmFydC9UZXN0MTk1OCRUcmFuc2Zvcm0BAAlU" + 67 "cmFuc2Zvcm0BAAxJbm5lckNsYXNzZXMBABBqYXZhL2xhbmcvT2JqZWN0AQAMYXJ0L1Rlc3QxOTU4" + 68 "ACAAAwAEAAAAAAACAAAABQAGAAEABwAAAB0AAQABAAAABSq3AAGxAAAAAQAIAAAABgABAAAABgAJ" + 69 "AAkACgABAAcAAAAbAAEAAAAAAAMSArAAAAABAAgAAAAGAAEAAAAIAAIACwAAAAIADAASAAAACgAB" + 70 "AAMADwARAAg="); 71 private static final byte[] DEX_BYTES = Base64.getDecoder().decode( 72 "ZGV4CjAzNQCRmEaLPLzpKe+CHcDM8YhIJCPWwcFR5yegAwAAcAAAAHhWNBIAAAAAAAAAAPQCAAAR" + 73 "AAAAcAAAAAcAAAC0AAAAAgAAANAAAAAAAAAAAAAAAAMAAADoAAAAAQAAAAABAACAAgAAIAEAAFgB" + 74 "AABgAQAAaQEAAGwBAACGAQAAlgEAALoBAADaAQAA7gEAAAICAAARAgAAHAIAAB8CAAAsAgAAMgIA" + 75 "ADkCAABAAgAAAwAAAAQAAAAFAAAABgAAAAcAAAAIAAAACwAAAAIAAAAFAAAAAAAAAAsAAAAGAAAA" + 76 "AAAAAAAAAQAAAAAAAAAAAA4AAAAEAAEAAAAAAAAAAAAAAAAABAAAAAAAAAAJAAAA5AIAAMYCAAAA" + 77 "AAAAAQAAAAAAAABUAQAAAwAAABoAAQARAAAAAQABAAEAAABQAQAABAAAAHAQAgAAAA4ABgAOAAgA" + 78 "DgAGPGluaXQ+AAdHb29kYnllAAFMABhMYXJ0L1Rlc3QxOTU4JFRyYW5zZm9ybTsADkxhcnQvVGVz" + 79 "dDE5NTg7ACJMZGFsdmlrL2Fubm90YXRpb24vRW5jbG9zaW5nQ2xhc3M7AB5MZGFsdmlrL2Fubm90" + 80 "YXRpb24vSW5uZXJDbGFzczsAEkxqYXZhL2xhbmcvT2JqZWN0OwASTGphdmEvbGFuZy9TdHJpbmc7" + 81 "AA1UZXN0MTk1OC5qYXZhAAlUcmFuc2Zvcm0AAVYAC2FjY2Vzc0ZsYWdzAARuYW1lAAVzYXlIaQAF" + 82 "dmFsdWUAdX5+RDh7ImNvbXBpbGF0aW9uLW1vZGUiOiJkZWJ1ZyIsIm1pbi1hcGkiOjEsInNoYS0x" + 83 "IjoiNTFjYWNlMWFiZGQwOGIzMjBmMjVmYjgxMTZjMjQzMmIwMmYwOTI5NSIsInZlcnNpb24iOiIx" + 84 "LjQuNS1kZXYifQACAgEPGAECAwIMBAgNFwoAAAIAAICABLgCAQmgAgAAAAACAAAAtwIAAL0CAADY" + 85 "AgAAAAAAAAAAAAAAAAAADgAAAAAAAAABAAAAAAAAAAEAAAARAAAAcAAAAAIAAAAHAAAAtAAAAAMA" + 86 "AAACAAAA0AAAAAUAAAADAAAA6AAAAAYAAAABAAAAAAEAAAEgAAACAAAAIAEAAAMgAAACAAAAUAEA" + 87 "AAIgAAARAAAAWAEAAAQgAAACAAAAtwIAAAAgAAABAAAAxgIAAAMQAAACAAAA1AIAAAYgAAABAAAA" + 88 "5AIAAAAQAAABAAAA9AIAAA=="); 89 run()90 public static void run() throws Exception { 91 Redefinition.setTestConfiguration(Redefinition.Config.COMMON_REDEFINE); 92 Method doSayHi = Runner.class.getDeclaredMethod("doSayHi"); 93 Method dontSayHi = Runner.class.getDeclaredMethod("dontSayHi"); 94 // Run the method enough times that the jit thinks it's interesting (default 10000). 95 for (int i = 0; i < 20000; i++) { 96 doSayHi.invoke(null); 97 dontSayHi.invoke(null); 98 } 99 // Sleep for 10 seconds to let the jit finish any work it's doing. 100 Thread.sleep(10 * 1000); 101 // Check what we get right now. 102 System.out.println("Before redefinition: " + doSayHi.invoke(null)); 103 Redefinition.doCommonClassRedefinition(Transform.class, CLASS_BYTES, DEX_BYTES); 104 System.out.println("After redefinition: " + doSayHi.invoke(null)); 105 } 106 } 107