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// 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.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ObjectiveC;
using Microsoft.DotNet.RemoteExecutor;
using Xunit;
using static System.Runtime.InteropServices.ObjectiveC.ObjectiveCMarshal;
namespace System.Runtime.InteropServices.Tests
{
[PlatformSpecific(TestPlatforms.OSX)]
[SkipOnMono("Not currently implemented on Mono")]
public unsafe class MessageSendTests
{
private static int s_count = 1;
private static bool s_callbackInvoked = false;
[UnmanagedCallersOnly]
private static IntPtr ObjCMsgSend(IntPtr inst, IntPtr sel) => ReturnPtr(MessageSendFunction.MsgSend);
[UnmanagedCallersOnly]
private static IntPtr ObjCMsgSendFpret(IntPtr inst, IntPtr sel) => ReturnPtr(MessageSendFunction.MsgSendFpret);
[UnmanagedCallersOnly]
private static void ObjCMsgSendStret(IntPtr* ret, IntPtr inst, IntPtr sel) => *ret = ReturnPtr(MessageSendFunction.MsgSendStret);
[UnmanagedCallersOnly]
private static IntPtr ObjCMsgSendSuper(IntPtr inst, IntPtr sel) => ReturnPtr(MessageSendFunction.MsgSendSuper);
[UnmanagedCallersOnly]
private static void ObjCMsgSendSuperStret(IntPtr* ret, IntPtr inst, IntPtr sel) => *ret = ReturnPtr(MessageSendFunction.MsgSendSuperStret);
private static IntPtr ReturnPtr(MessageSendFunction msgSendFunc)
{
s_callbackInvoked = true;
return new IntPtr(s_count + (int)msgSendFunc);
}
private static (MessageSendFunction MsgSend, IntPtr Func)[] msgSendOverrides =
{
(MessageSendFunction.MsgSend, (IntPtr)(delegate* unmanaged<IntPtr, IntPtr, IntPtr>)&ObjCMsgSend),
(MessageSendFunction.MsgSendFpret, (IntPtr)(delegate* unmanaged<IntPtr, IntPtr, IntPtr>)&ObjCMsgSendFpret),
(MessageSendFunction.MsgSendStret, (IntPtr)(delegate* unmanaged<IntPtr*, IntPtr, IntPtr, void>)&ObjCMsgSendStret),
(MessageSendFunction.MsgSendSuper, (IntPtr)(delegate* unmanaged<IntPtr, IntPtr, IntPtr>)&ObjCMsgSendSuper),
(MessageSendFunction.MsgSendSuperStret, (IntPtr)(delegate* unmanaged<IntPtr*, IntPtr, IntPtr, void>)&ObjCMsgSendSuperStret),
};
[Fact]
public void SetMessageSendCallback_NullCallback()
{
Assert.Throws<ArgumentNullException>(() => ObjectiveCMarshal.SetMessageSendCallback(MessageSendFunction.MsgSend, IntPtr.Zero));
}
[Fact]
public void SetMessageSendCallback_InvalidMessageSendFunction()
{
Assert.Throws<ArgumentOutOfRangeException>(() => ObjectiveCMarshal.SetMessageSendCallback((MessageSendFunction)100, msgSendOverrides[0].Func));
}
[ConditionalFact(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]
public void SetMessageSendCallback_AlreadySet()
{
RemoteExecutor.Invoke(() =>
{
var (msgSend, func) = msgSendOverrides[0];
ObjectiveCMarshal.SetMessageSendCallback(msgSend, func);
Assert.Throws<InvalidOperationException>(() => ObjectiveCMarshal.SetMessageSendCallback(msgSend, func));
}).Dispose();
}
public static IEnumerable<object[]> MessageSendFunctionsToOverride()
{
yield return new[] { (MessageSendFunction[])Enum.GetValues<MessageSendFunction>() };
yield return new[] { new MessageSendFunction[]{ MessageSendFunction.MsgSend, MessageSendFunction.MsgSendStret } };
}
[ConditionalTheory(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]
[MemberData(nameof(MessageSendFunctionsToOverride))]
public void SetMessageSendCallback(MessageSendFunction[] funcsToOverride)
{
// Pass functions to override as a string for remote execution
RemoteExecutor.Invoke((string funcsToOverrideAsStr) =>
{
string[] msgSendStrArray = funcsToOverrideAsStr.Split(';');
MessageSendFunction[] msgSendArray = new MessageSendFunction[msgSendStrArray.Length];
for (int i = 0; i < msgSendStrArray.Length; i++)
{
MessageSendFunction msgSend = Enum.Parse<MessageSendFunction>(msgSendStrArray[i]);
Assert.True(Enum.IsDefined<MessageSendFunction>(msgSend));
msgSendArray[i] = msgSend;
}
SetMessageSendCallbackImpl(msgSendArray);
}, string.Join(';', funcsToOverride)).Dispose();
}
private static void SetMessageSendCallbackImpl(MessageSendFunction[] funcsToOverride)
{
foreach (var (msgSend, func) in msgSendOverrides)
{
if (!LibObjC.SupportedOnPlatform(msgSend))
{
continue;
}
bool shouldOverride = Array.IndexOf(funcsToOverride, msgSend) >= 0;
IntPtr expected;
IntPtr inst = IntPtr.Zero;
IntPtr sel = IntPtr.Zero;
if (shouldOverride)
{
// Override message send function
ObjectiveCMarshal.SetMessageSendCallback(msgSend, func);
expected = (IntPtr)(s_count + (int)msgSend);
}
else
{
if (msgSend == MessageSendFunction.MsgSendSuper || msgSend == MessageSendFunction.MsgSendSuperStret)
{
// Calling super message functions requires a valid superclass and selector
var super = new LibObjC.objc_super()
{
receiver = IntPtr.Zero,
super_class = LibObjC.objc_getClass("NSObject")
};
inst = (IntPtr)(&super);
sel = LibObjC.sel_getUid("self");
}
// Sending message to nil should return nil
expected = IntPtr.Zero;
}
// Call message send function through P/Invoke
IntPtr ret = LibObjC.CallPInvoke(msgSend, inst, sel);
Assert.Equal(shouldOverride, s_callbackInvoked);
Assert.Equal(expected, ret);
s_count++;
s_callbackInvoked = false;
}
}
}
}
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