1 files changed, 26 insertions, 0 deletions
diff --git a/src/libraries/Common/tests/TestUtilities/System/Buffers/PoisonPagePlacement.cs b/src/libraries/Common/tests/TestUtilities/System/Buffers/PoisonPagePlacement.cs
new file mode 100644
index 00000000000..ea2caa3136b
--- /dev/null
+++ b/src/libraries/Common/tests/TestUtilities/System/Buffers/PoisonPagePlacement.cs
@@ -0,0 +1,26 @@
+// 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.
+
+namespace System.Buffers
+{
+    /// <summary>
+    /// Dictates where the poison page should be placed.
+    /// </summary>
+    public enum PoisonPagePlacement
+    {
+        /// <summary>
+        /// The poison page should be placed immediately after the memory region.
+        /// Attempting to access the memory page immediately following the
+        /// span will result in an AV.
+        /// </summary>
+        After,
+
+        /// <summary>
+        /// The poison page should be placed immediately before the memory region.
+        /// Attempting to access the memory page immediately before the
+        /// span will result in an AV.
+        /// </summary>
+        Before,
+    }
+}
+\ No newline at end of file