public void TestDynamicMethodEmitCalliNonBlittable()
{
string input = "Test string!", result = "!gnirts tseT";
Type returnType = typeof(string);
var dynamicMethod = new DynamicMethod("F", returnType, new Type[] { typeof(IntPtr), typeof(string) });
ILGenerator il = dynamicMethod.GetILGenerator();
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldarg_0);
il.EmitCalli(OpCodes.Calli, CallingConvention.Cdecl, returnType, new Type[] { typeof(string) });
il.Emit(OpCodes.Ret);
var del = new StringReverseCdecl(StringReverse);
IntPtr funcPtr = Marshal.GetFunctionPointerForDelegate(del);
object resultValue = dynamicMethod
.Invoke(null, new object[] { funcPtr, input });
GC.KeepAlive(del);
Assert.IsType(returnType, resultValue);
Assert.Equal(result, resultValue);
}
public void TestEmitCalliNonBlittable()
{
string input = "Test string!", result = "!gnirts tseT";
ModuleBuilder moduleBuilder = Helpers.DynamicModule();
TypeBuilder typeBuilder = moduleBuilder.DefineType("T", TypeAttributes.Public);
Type returnType = typeof(string);
MethodBuilder methodBuilder = typeBuilder.DefineMethod("F",
MethodAttributes.Public | MethodAttributes.Static, returnType, new Type[] { typeof(IntPtr), typeof(string) });
methodBuilder.SetImplementationFlags(MethodImplAttributes.NoInlining);
ILGenerator il = methodBuilder.GetILGenerator();
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldarg_0);
il.EmitCalli(OpCodes.Calli, CallingConvention.Cdecl, returnType, new Type[] { typeof(string) });
il.Emit(OpCodes.Ret);
Type dynamicType = typeBuilder.CreateType();
var del = new StringReverseCdecl(StringReverse);
IntPtr funcPtr = Marshal.GetFunctionPointerForDelegate(del);
object resultValue = dynamicType
.GetMethod("F", BindingFlags.Public | BindingFlags.Static)
.Invoke(null, new object[] { funcPtr, input });
GC.KeepAlive(del);
Assert.IsType(returnType, resultValue);
Assert.Equal(result, resultValue);
}
