1/* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16/* 17 * Description: 18 * 1. This code tests the lazy deoptimization that occurs in ldobjbyname. 19 * After the JIT code for function 'Test2' is compiled, 20 * modifying an HClass invalidates the function, 21 * and subsequent accesses to it will detect this invalidation. 22 * 2. Test2 call ChangePrototypeValue inlined. 23 * 3. Test GC effect. 24 */ 25 26// Modify the value of property 'x' on a specific level in the prototype chain of the object. 27function ChangePrototypeValue(obj, shouldChange) { 28 print("ChangeProto start."); 29 let foo = {} 30 Object.defineProperty(foo, 'x', { 31 get: function () { 32 obj.__proto__.x = 2; 33 return "Set success."; 34 }, 35 enumerable: true, 36 configurable: true 37 }); 38 if (shouldChange) { 39 // Change the property 'x' at the second level of the prototype chain, 40 // triggering lazy deoptimization of the JIT-compiled 'Test2' function. 41 print(foo.x); 42 } 43 ArkTools.forceFullGC(); 44 let arr = new Array(100000); 45 let sum = 0; 46 for (let i = 0; i < 100000; i++) { 47 arr[i] = 233; 48 } 49 for (let i = 0; i < 100000; i++) { 50 sum += arr[i]; 51 } 52 print("sum:", sum); 53 print("ChangeProto end."); 54} 55 56 57// Test function that calls ChangePrototypeValue and prints the value of obj.x. 58function Test2(obj, shouldChange) { 59 print("Test2 start."); 60 ChangePrototypeValue(obj, shouldChange); 61 print("Test2 obj.x :", obj.x); 62 print("Test2 end."); 63} 64 65class A {} 66class B extends A {} 67class C extends B {} 68 69// Set the initial value of property x through A.prototype. 70A.prototype.x = 1; 71 72const c = new C(); 73 74// Initial call to test without changing the prototype's property. 75Test2(c, false); 76 77ArkTools.jitCompileAsync(Test2); 78print(ArkTools.waitJitCompileFinish(Test2)); 79 80print("------------------------------------------------------"); 81// Call test with the flag set to true to modify the prototype property, triggering lazy deoptimization. 82Test2(c, true);