tests/test-366.cs

   1 //
   2 // Check that the empty field we produce on empty structs with LayoutKind.Explicit
   3 // has a FieldOffset of zero, or the .NET runtime complains
   4 //
   5 using System;
   6 using System.Reflection;
   7 using System.Runtime.InteropServices;
   8
   9 [StructLayout(LayoutKind.Explicit)]
  10 struct foo2 {
  11 }
  12
  13 class C
  14 {
  15         static int Main ()
  16         {
  17                 foo2 f = new foo2 ();
  18
  19                 // On .NET if we got this far, we run
  20                 // On Mono, we are going to actually use an internal routine to check if the offset is there
  21                 //
  22                 Type fit = typeof (FieldInfo);
  23                 MethodInfo gfo = fit.GetMethod ("GetFieldOffset", BindingFlags.Instance | BindingFlags.NonPublic);
  24                 if (gfo == null){
  25                         Console.WriteLine ("PASS: On MS runtime, Test OK");
  26                         return 0;
  27                 }
  28
  29                 Type t = typeof (foo2);
  30                 FieldInfo fi = t.GetField ("$PRIVATE$", BindingFlags.Instance | BindingFlags.NonPublic);
  31
  32                 object res = gfo.Invoke (fi, null);
  33                 if (res.GetType () != typeof (Int32))
  34                         return 1;
  35                 int r = (int) res;
  36                 if (r != 0){
  37                         Console.WriteLine ("FAIL: Offset is not zero");
  38                         return 1;
  39                 }
  40                 Console.WriteLine ("PASS: Test passes on Mono");
  41                 return 0;
  42     }
  43 }
  44
  45