iOS: Attempting to JIT compile method '(wrapper native-to-managed) void System.Net.NetworkInformation.BsdNetworkInterface/<>c__DisplayClass5_0:<GetBsdNetworkInterfaces>b__0 (intptr,Interop/Sys/IpAddressInfo*)' while running in aot-only mode.

[rolfbjarne]

Description

The following code throws an exception at runtime when running on an iOS device:

NetworkInterface.GetAllNetworkInterfaces ();

Exception:

System.ExecutionEngineException: Attempting to JIT compile method '(wrapper native-to-managed) void System.Net.NetworkInformation.BsdNetworkInterface/<>c__DisplayClass5_0:<GetBsdNetworkInterfaces>b__0 (intptr,Interop/Sys/IpAddressInfo*)' while running in aot-only mode. See https://docs.microsoft.com/xamarin/ios/internals/limitations for more information.
    at System.Net.NetworkInformation.BsdNetworkInterface.GetBsdNetworkInterfaces()
    at System.Net.NetworkInformation.NetworkInterfacePal.GetAllNetworkInterfaces()
    at System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()
    at MySingleView.AppDelegate.FinishedLaunching(UIApplication app, NSDictionary options) in /Users/rolf/work/maccore/onedotnet/xamarin-macios/tests/dotnet/MySingleView/AppDelegate.cs:line 43

Repro:

git clone https://github.com/rolfbjarne/xamarin-macios
cd xamarin-macios
git checkout dotnet-attempting-to-jit-compile-method-GetBsdNetworkInterfaces
./configure --enable-dotnet
make reset
make all -j8
make install -j8
make singleview -C tests/dotnet

Complete output

Configuration

.NET 6.0.100-alpha.1.21060.3

Binlog:
MySingleView.binlog.zip

Regression?

No (new feature)

[ghost]

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Issue Details

---

Description

The following code throws an exception at runtime when running on an iOS device:

NetworkInterface.GetAllNetworkInterfaces ();

Exception:

System.ExecutionEngineException: Attempting to JIT compile method '(wrapper native-to-managed) void System.Net.NetworkInformation.BsdNetworkInterface/<>c__DisplayClass5_0:<GetBsdNetworkInterfaces>b__0 (intptr,Interop/Sys/IpAddressInfo*)' while running in aot-only mode. See https://docs.microsoft.com/xamarin/ios/internals/limitations for more information.
    at System.Net.NetworkInformation.BsdNetworkInterface.GetBsdNetworkInterfaces()
    at System.Net.NetworkInformation.NetworkInterfacePal.GetAllNetworkInterfaces()
    at System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()
    at MySingleView.AppDelegate.FinishedLaunching(UIApplication app, NSDictionary options) in /Users/rolf/work/maccore/onedotnet/xamarin-macios/tests/dotnet/MySingleView/AppDelegate.cs:line 43

Repro:

git clone https://github.com/rolfbjarne/xamarin-macios
cd xamarin-macios
git checkout dotnet-attempting-to-jit-compile-method-GetBsdNetworkInterfaces
./configure --enable-dotnet
make reset
make all -j8
make install -j8
make singleview -C tests/dotnet

Complete output

Configuration

.NET 6.0.100-alpha.1.21060.3

Binlog:
MySingleView.binlog.zip

Regression?

No (new feature)

Author:	rolfbjarne
Assignees:	-
Labels:	area-System.Net, untriaged
Milestone:	-

[lambdageek]

This is similar to #55736 - It's not an AOT compiler problem, it's a problem in the libraries not using [UnmanagedCallersOnly] or [MonoPInvokeCallback] to tell the AOT compiler that a managed function will be passed to native code and invoked from there.

This particular issue looks like it was fixed by #52192 which switched from passing lambdas to the native method, to using unmanaged function pointers.