Imported Upstream version 1.0.0.9127upstream/1.0.0.9127

1 files changed, 60 insertions, 0 deletions

diff --git a/tests/src/baseservices/compilerservices/FixedAddressValueType/FixedAddressValueType.cs b/tests/src/baseservices/compilerservices/FixedAddressValueType/FixedAddressValueType.cs
new file mode 100644
index 0000000000..bf10d817e5
--- /dev/null
+++ b/tests/src/baseservices/compilerservices/FixedAddressValueType/FixedAddressValueType.cs
@@ -0,0 +1,60 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+//
+using System;
+using System.Runtime.CompilerServices;
+
+public struct Age {
+   public int years;
+   public int months;
+}
+
+public class FreeClass
+{
+   public static Age FreeAge;
+
+   public static unsafe IntPtr AddressOfFreeAge()
+   { 
+      fixed (Age* pointer = &FreeAge) 
+      { return (IntPtr) pointer; } 
+   }
+}
+
+public class FixedClass
+{
+   [FixedAddressValueType]
+   public static Age FixedAge;
+
+   public static unsafe IntPtr AddressOfFixedAge()
+   { 
+      fixed (Age* pointer = &FixedAge) 
+      { return (IntPtr) pointer; } 
+   }   
+}
+
+public class Example
+{
+   public static int Main()
+   {
+      // Get addresses of static Age fields.
+      IntPtr freePtr1 = FreeClass.AddressOfFreeAge();
+
+      IntPtr fixedPtr1 = FixedClass.AddressOfFixedAge();
+
+      // Garbage collection.
+      GC.Collect(3, GCCollectionMode.Forced, true, true);
+      GC.WaitForPendingFinalizers();
+      
+      // Get addresses of static Age fields after garbage collection.
+      IntPtr freePtr2 = FreeClass.AddressOfFreeAge();
+      IntPtr fixedPtr2 = FixedClass.AddressOfFixedAge();
+
+      if(freePtr1 != freePtr2 && fixedPtr1 == fixedPtr2)
+      {
+          return 100;
+      }
+
+      return -1;
+   }
+}