public static int ManagedDoubleInNativeCallback(int n)
{
// This callback is designed to test if the JIT handles
// cases where a P/Invoke is inlined into a function
// marked with UnmanagedCallersOnly.
return(UnmanagedCallersOnlyDll.DoubleImplNative(n));
}
public static void NegativeTest_NonStaticMethod()
{
Console.WriteLine($"Running {nameof(NegativeTest_NonStaticMethod)}...");
int n = 12345;
Assert.Throws <InvalidProgramException>(() => { UnmanagedCallersOnlyDll.CallManagedProc(Callbacks.GetNonStaticCallbackFunctionPointer(), n); });
}
public static void NegativeTest_NonBlittable()
{
Console.WriteLine($"Running {nameof(NegativeTest_NonBlittable)}...");
int n = 12345;
// Try invoking method
Assert.Throws <InvalidProgramException>(() => { UnmanagedCallersOnlyDll.CallManagedProc((IntPtr)(delegate * unmanaged <bool, int>) & CallbackMethodNonBlittable, n); });
Assert.Throws <InvalidProgramException>(() => { UnmanagedCallersOnlyDll.CallManagedProc(UnmanagedCallersOnlyWithByRefs.GetWithByRefFunctionPointer(), n); });
Assert.Throws <InvalidProgramException>(() => { UnmanagedCallersOnlyDll.CallManagedProc(UnmanagedCallersOnlyWithByRefs.GetWithByRefInFunctionPointer(), n); });
Assert.Throws <InvalidProgramException>(() => { UnmanagedCallersOnlyDll.CallManagedProc(UnmanagedCallersOnlyWithByRefs.GetWithByRefOutFunctionPointer(), n); });
}
public static void TestPInvokeMarkedWithUnmanagedCallersOnly()
{
Console.WriteLine($"Running {nameof(TestPInvokeMarkedWithUnmanagedCallersOnly)}...");
// Call P/Invoke directly
Assert.Throws <NotSupportedException>(() => UnmanagedCallersOnlyDll.PInvokeMarkedWithUnmanagedCallersOnly(0));
// Call P/Invoke via reflection
var method = typeof(UnmanagedCallersOnlyDll).GetMethod(nameof(UnmanagedCallersOnlyDll.PInvokeMarkedWithUnmanagedCallersOnly));
Assert.Throws <NotSupportedException>(() => method.Invoke(null, BindingFlags.DoNotWrapExceptions, null, new[] { (object)0 }, null));
// Call P/Invoke as a function pointer
/*
* void TestPInvokeMarkedWithUnmanagedCallersOnly_Throws()
* {
* .locals init (native int V_0)
* IL_0000: nop
* IL_0001: ldftn int UnmanagedCallersOnlyDll.PInvokeMarkedWithUnmanagedCallersOnly(int32)
* IL_0007: stloc.0
*
* IL_0008: ldc.i4 1234
* IL_000d: ldloc.0
* IL_000e: calli int32 stdcall(int32)
*
* IL_0014: ret
* }
*/
DynamicMethod testUnmanagedCallersOnly = new DynamicMethod("TestPInvokeMarkedWithUnmanagedCallersOnly_Throws", typeof(int), null, typeof(Program).Module);
ILGenerator il = testUnmanagedCallersOnly.GetILGenerator();
il.DeclareLocal(typeof(IntPtr));
il.Emit(OpCodes.Nop);
// Get native function pointer of the callback
il.Emit(OpCodes.Ldftn, method);
il.Emit(OpCodes.Stloc_0);
int n = 1234;
il.Emit(OpCodes.Ldc_I4, n);
il.Emit(OpCodes.Ldloc_0);
il.EmitCalli(OpCodes.Calli, CallingConvention.StdCall, typeof(int), new Type[] { typeof(int) });
il.Emit(OpCodes.Ret);
IntNativeMethodInvoker testNativeMethod = (IntNativeMethodInvoker)testUnmanagedCallersOnly.CreateDelegate(typeof(IntNativeMethodInvoker));
Assert.Throws <NotSupportedException>(() => testNativeMethod());
}