public void IntPtrSizeTest()
{
IgnoreIfNotLinkAll();
var S8methods = new MethodInfo []
{
GetType().GetMethod(nameof(Size8Test), BindingFlags.NonPublic | BindingFlags.Instance),
GetType().GetMethod(nameof(Size8Test_Optimizable), BindingFlags.NonPublic | BindingFlags.Instance)
};
var S4methods = new MethodInfo []
{
GetType().GetMethod(nameof(Size4Test), BindingFlags.NonPublic | BindingFlags.Instance),
GetType().GetMethod(nameof(Size4Test_Optimizable), BindingFlags.NonPublic | BindingFlags.Instance)
};
MethodInfo[] passingMethods = null;
MethodInfo[] failingMethods = null;
switch (IntPtr.Size)
{
case 4:
Size4Test();
Size4Test_Optimizable();
Assert.Throws <NUnit.Framework.Internal.NUnitException> (Size8Test, "Size8Test");
Assert.Throws <NUnit.Framework.Internal.NUnitException> (Size8Test_Optimizable, "Size8Test_Optimizable");
passingMethods = S4methods;
failingMethods = S8methods;
break;
case 8:
Size8Test();
Size8Test_Optimizable();
Assert.Throws <NUnit.Framework.Internal.NUnitException> (Size4Test, "Size4Test");
Assert.Throws <NUnit.Framework.Internal.NUnitException> (Size4Test_Optimizable, "Size4Test_Optimizable");
passingMethods = S8methods;
failingMethods = S4methods;
break;
default:
Assert.Fail("Invalid size: {0}", IntPtr.Size);
break;
}
#if !DEBUG
// Verify that the passing method is completely empty (save for nop instructions and a final ret instruction).
// Unfortunately in debug mode csc produces IL sequences the optimizer doesn't understand (a lot of unnecessary instructions),
// which means we can only check this in release mode. Also on device this will probably always pass,
// since we strip assemblies (and the methods will always be empty), but running the test shouldn't hurt.
foreach (var passingMethod in passingMethods)
{
IEnumerable <ILInstruction> passingInstructions = new ILReader(passingMethod);
passingInstructions = passingInstructions.Where((v) => v.OpCode.Name != "nop");
Assert.AreEqual(1, passingInstructions.Count(), "empty body");
}
#else
// Verify that the failing methods are not completely empty (even excluding nop instructions and the final ret instruction).
// This can only be executed in debug mode, because in release mode the IL will be stripped away and the methods will be empty.
foreach (var failingMethod in failingMethods)
{
IEnumerable <ILInstruction> failingInstructions = new ILReader(failingMethod);
failingInstructions = failingInstructions.Where((v) => v.OpCode.Name != "nop");
Assert.That(failingInstructions.Count(), Is.GreaterThan(1), "non-empty body");
}
#endif
}