[mono] FullAOT compilation of Microsoft.iOS.dll crashes with managed static registrar

[ivanpovazan]

Problem

Managed static registrar - (MSR further in the text), is a new Xamarin feature being introduced via: dotnet/macios#18268

The feature is been tested in the PR and works correctly with .NET7. However, when using the current - .NET8 preview 5 version of the MonoAOT compiler and MSR, AOT compilation of Microsoft.iOS.dll crashes with the following error message:

mono-aot-cross(68995,0x1df9cdb40) malloc: Incorrect checksum for freed object 0x12674acd8: probably modified after being freed.
Corrupt value: 0x1311c010120041c

Repro

1. Merge: https://github.com/rolfbjarne/xamarin-macios/tree/msr into https://github.com/xamarin/xamarin-macios/tree/main
2. Merge: https://github.com/xamarin/xamarin-macios/tree/main into https://github.com/xamarin/xamarin-macios/tree/net8.0
3. Build the repo:

make world

4. Navigate to MySingleView sample:

cd tests/dotnet/MySingleView

5. Build the sample:

../../../builds/downloads/dotnet-sdk-8.0.100-preview.5.23258.8/dotnet build -c Debug /bl /t:Run -r ios-arm64 -p:MtouchExtraArgs=--registrar:managed-static

6. The build should fail with:

Tool /Users/ivan/repos/xamarin/xamarin-macios/builds/downloads/dotnet-sdk-8.0.100-preview.5.23258.8/packs/Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.ios-arm64/8.0.0-preview.5.23252.13/Sdk/../tools/mono-aot-cross execution finished (exit code = 134).
          
/Users/ivan/repos/xamarin/xamarin-macios/builds/downloads/dotnet-sdk-8.0.100-preview.5.23258.8/packs/Microsoft.iOS.Sdk/16.4.8451-ci.net8-0-msr/targets/Xamarin.Shared.Sdk.targets(1082,3): error : Failed to AOT compile aot-instances.dll, the AOT compiler exited with code 134 [/Users/ivan/repos/xamarin/xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj]
  Tool /Users/ivan/repos/xamarin/xamarin-macios/builds/downloads/dotnet-sdk-8.0.100-preview.5.23258.8/packs/Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.ios-arm64/8.0.0-preview.5.23252.13/Sdk/../tools/mono-aot-cross execution finished (exit code = 139).
          
/Users/ivan/repos/xamarin/xamarin-macios/builds/downloads/dotnet-sdk-8.0.100-preview.5.23258.8/packs/Microsoft.iOS.Sdk/16.4.8451-ci.net8-0-msr/targets/Xamarin.Shared.Sdk.targets(1082,3): error : Failed to AOT compile Microsoft.iOS.dll, the AOT compiler exited with code 139 [/Users/ivan/repos/xamarin/xamarin-macios/tests/dotnet/MySingleView/MySingleView.csproj]

Build FAILED.

7. Set MONO_PATH

export MONO_PATH=/Users/ivan/repos/xamarin/xamarin-macios/tests/dotnet/MySingleView/obj/Debug/net8.0-ios/ios-arm64/linked

8. AOT Compile Microsoft.iOS.dll with:

/Users/ivan/repos/xamarin/xamarin-macios/builds/downloads/dotnet-sdk-8.0.100-preview.5.23258.8/packs/Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.ios-arm64/8.0.0-preview.5.23252.13/Sdk/../tools/mono-aot-cross --aot=mtriple=arm64-ios,data-outfile=obj/Debug/net8.0-ios/ios-arm64/nativelibraries/aot-output/arm64/Microsoft.iOS.aotdata,static,asmonly,dedup-skip,direct-icalls,full,readonly-value=ObjCRuntime.Runtime.Arch=i4/0,dwarfdebug,no-direct-calls,outfile=obj/Debug/net8.0-ios/ios-arm64/nativelibraries/aot-output/arm64/Microsoft.iOS.dll.s --debug -O=gsharedvt /Users/ivan/repos/xamarin/xamarin-macios/tests/dotnet/MySingleView/obj/Debug/net8.0-ios/ios-arm64/linked/Microsoft.iOS.dll

9. AOT compiler throws with:

Mono Ahead of Time compiler - compiling assembly /Users/ivan/repos/xamarin/xamarin-macios/tests/dotnet/MySingleView/obj/Debug/net8.0-ios/ios-arm64/linked/Microsoft.iOS.dll
AOTID 5D36E7A7-60A5-F99E-9CCD-F2A9D006C9A5
mono-aot-cross(2918,0x203a1f280) malloc: Incorrect checksum for freed object 0x7fa39b047bd0: probably modified after being freed.
Corrupt value: 0x9000000000071112
mono-aot-cross(2918,0x203a1f280) malloc: *** set a breakpoint in malloc_error_break to debug

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/cc: @rolfbjarne @filipnavara @kotlarmilos