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 stobjbyname. 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 if (shouldChange) { 30 // Change the property 'x' at the second level of the prototype chain, 31 // triggering lazy deoptimization of the JIT-compiled 'Test2' function. 32 Object.defineProperty(obj.__proto__.__proto__, 'x', { 33 set: function (value) { 34 this._x = 2; 35 print("Set value to 2."); 36 }, 37 enumerable: true, 38 configurable: true 39 }); 40 } 41 ArkTools.forceFullGC(); 42 let arr = new Array(100000); 43 let sum = 0; 44 for (let i = 0; i < 100000; i++) { 45 arr[i] = 233; 46 } 47 for (let i = 0; i < 100000; i++) { 48 sum += arr[i]; 49 } 50 print("sum:", sum); 51 print("ChangeProto end."); 52} 53 54 55// Test function that calls ChangePrototypeValue and prints the value of obj.x. 56function Test2(obj, shouldChange) { 57 print("Test2 start."); 58 ChangePrototypeValue(obj, shouldChange); 59 obj.x = 1; 60 print("Test2 obj.x :", obj.x); 61 print("Test2 end."); 62} 63 64class A {} 65class B extends A {} 66class C extends B {} 67 68// Set the initial value of property x through A.prototype. 69A.prototype.x = 1; 70 71const c = new C(); 72 73// Initial call to test without changing the prototype's property. 74Test2(c, false); 75 76ArkTools.jitCompileAsync(Test2); 77print(ArkTools.waitJitCompileFinish(Test2)); 78 79print("------------------------------------------------------"); 80// Call test with the flag set to true to modify the prototype property, triggering lazy deoptimization. 81const c2 = new C(); 82Test2(c2, true);