The "PInvokeTableGenerator" task failed unexpectedly when using delegate* in [DllImport]
#60802
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ghost
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area-Interop-coreclr
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lambdageek
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arch-wasm
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Tagging subscribers to 'arch-wasm': @lewing Issue DetailsDescriptionThis code results in an error: extern static void my_class_set_callback(nint obj, delegate* unmanaged<bool, nint, void> callback, nint state);I tried Reproduction Steps
Expected behaviorNo error. I am trying to replicate this code without the MyClass myInstance = new MyClass();
unsafe class MyClass
{
private nint handle;
public MyClass()
{
handle = my_class_new();
var callbackState = (IntPtr)1234;
my_class_set_callback(handle, OnCallbackProxy, callbackState);
my_class_set_value(handle, 10);
}
[DllImport("library")] extern static nint my_class_new();
[DllImport("library")] extern static void my_class_set_value(nint obj, int value);
[DllImport("library")] extern static void my_class_set_callback(nint obj, MyCallback callback, nint state);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
delegate void MyCallback([MarshalAs(UnmanagedType.I1)] bool is10x, nint state);
[MonoPInvokeCallback(typeof(MyCallback))]
static void OnCallback([MarshalAs(UnmanagedType.I1)] bool is10x, nint state)
{
Console.WriteLine($"Here! {is10x} and {state}");
}
static readonly MyCallback OnCallbackProxy = OnCallback;
}
[AttributeUsage(AttributeTargets.Method)]
internal sealed class MonoPInvokeCallbackAttribute : Attribute
{
public MonoPInvokeCallbackAttribute(Type type)
{
Type = type;
}
public Type Type { get; private set; }
}Actual behaviorError. Using this: MyClass myInstance = new MyClass();
unsafe class MyClass
{
private nint handle;
public MyClass()
{
handle = my_class_new();
var callbackState = (IntPtr)1234;
delegate* unmanaged<bool, nint, void> proxy = &OnCallbackUnmanagedOnly;
my_class_set_callback(handle, (void*)proxy, callbackState);
my_class_set_value(handle, 10);
}
[DllImport("library")] extern static nint my_class_new();
[DllImport("library")] extern static void my_class_set_value(nint obj, int value);
[DllImport("library")] extern static void my_class_set_callback(nint obj, void* callback, nint state);
//[DllImport("library")] extern static void my_class_set_callback(nint obj, delegate* unmanaged<bool, nint, void> callback, nint state);
[UnmanagedCallersOnly]
static void OnCallbackUnmanagedOnly(bool is10x, nint state)
{
Console.WriteLine($"Here! {is10x} and {state}");
}
}Regression?No response Known WorkaroundsUse the old Configuration
Other information
|
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The pinvoke table generator can't handle unmanaged function pointers, because |
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Thank you for sharing the code, which I can use in a test case. This is a dupe of #56145 . |
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Description
This code results in an error:
I tried
void*in there just in case it was something to do with thedelegate*, but I now get a runtime error:Reproduction Steps
Expected behavior
No error. I am trying to replicate this code without the
MonoPInvokeCallbackAttribute:Actual behavior
Error.
Using this:
Regression?
No response
Known Workarounds
Use the old
[MonoPInvokeCallback]formatConfiguration
Other information
BlazorApp6.zip
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