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