Add a test

src/tests/JIT/Regression/JitBlue/Runtime_65937/Runtime_65937.cs

@@ -0,0 +1,71 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+public unsafe class Runtime_65937
+{
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    public static int Main()
+    {
+        if (!OperatingSystem.IsLinux())
+        {
+            return 100;
+        }
+
+        const int PROT_NONE = 0x0;
+        const int PROT_READ = 0x1;
+        const int PROT_WRITE = 0x2;
+        const int MAP_PRIVATE = 0x02;
+        const int MAP_ANONYMOUS = 0x20;
+        const int PAGE_SIZE = 0x1000;
+
+        byte* pages = (byte*)mmap(null, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+
+        if (pages == (byte*)-1)
+        {
+            Console.WriteLine("Failed to allocate two pages, errno is {0}, giving up on the test", Marshal.GetLastSystemError());
+            return 100;
+        }
+
+        if (mprotect(pages + PAGE_SIZE, PAGE_SIZE, PROT_NONE) != 0)
+        {
+            Console.WriteLine("Failed to protect the second page, errno is {0}, giving up on the test", Marshal.GetLastSystemError());
+            munmap(pages, 2 * PAGE_SIZE);
+            return 100;
+        }
+
+        CallWithStkArg(0, 0, 0, 0, 0, 0, *(StructWithNineBytes*)(pages + PAGE_SIZE - sizeof(StructWithNineBytes)));
+
+        munmap(pages, 2 * PAGE_SIZE);
+
+        return 100;
+    }
+
+    struct StructWithNineBytes
+    {
+        byte ByteOne;
+        byte ByteTwo;
+        byte ByteThree;
+        byte ByteFour;
+        byte ByteFive;
+        byte ByteSix;
+        byte ByteSeven;
+        byte ByteEight;
+        byte ByteNine;
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private static void CallWithStkArg(int a, int b, int c, int d, int e, int f, StructWithNineBytes stkArg) { }
+
+    [DllImport("libc")]
+    private static extern void* mmap(void* addr, nuint length, int prot, int flags, int fd, nuint offset);
+
+    [DllImport("libc")]
+    private static extern int mprotect(void* addr, nuint len, int prot);
+
+    [DllImport("libc")]
+    private static extern int munmap(void* addr, nuint length);
+}

src/tests/JIT/Regression/JitBlue/Runtime_65937/Runtime_65937.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <DebugType>None</DebugType>
+    <Optimize>True</Optimize>
+    <OutputType>Exe</OutputType>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+</Project>