1 // 2 // GCTest.cs - NUnit Test Cases for GC 3 // 4 // Authors: 5 // Marek Safar <marek.safar@gmail.com> 6 // 7 // Copyright (C) 2016 Xamarin Inc (http://www.xamarin.com) 8 // 9 // Permission is hereby granted, free of charge, to any person obtaining 10 // a copy of this software and associated documentation files (the 11 // "Software"), to deal in the Software without restriction, including 12 // without limitation the rights to use, copy, modify, merge, publish, 13 // distribute, sublicense, and/or sell copies of the Software, and to 14 // permit persons to whom the Software is furnished to do so, subject to 15 // the following conditions: 16 // 17 // The above copyright notice and this permission notice shall be 18 // included in all copies or substantial portions of the Software. 19 // 20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 27 // 28 29 using System; 30 using System.Threading; 31 using System.Threading.Tasks; 32 33 using NUnit.Framework; 34 35 namespace MonoTests.System { 36 37 [TestFixture] 38 public class GCTest { 39 40 class MyFinalizeObject 41 { 42 public volatile static int finalized; 43 ~MyFinalizeObject()44 ~MyFinalizeObject () 45 { 46 if (finalized++ == 0) { 47 GC.ReRegisterForFinalize (this); 48 } 49 } 50 } 51 Run_ReRegisterForFinalizeTest()52 static void Run_ReRegisterForFinalizeTest () 53 { 54 var m = new WeakReference<MyFinalizeObject> (new MyFinalizeObject ()); 55 m.SetTarget (null); 56 } 57 58 [Test] 59 [Category ("InterpreterNotWorking")] ReRegisterForFinalizeTest()60 public void ReRegisterForFinalizeTest () 61 { 62 var thread = new Thread (Run_ReRegisterForFinalizeTest); 63 thread.Start (); 64 thread.Join (); 65 66 var t = Task.Factory.StartNew (() => { 67 do { 68 GC.Collect (); 69 GC.WaitForPendingFinalizers (); 70 Task.Yield (); 71 } while (MyFinalizeObject.finalized != 2); 72 }); 73 74 Assert.IsTrue (t.Wait (5000)); 75 } 76 } 77 } 78