DotnetFuzzing doesn't compile on linux succesfully

[personnumber3377]

Description

After building dotnet with ./build.sh -subset clr+libs -configuration Release -runtimeConfiguration Debug and then trying to run dotnet build with the compiled binary in the fuzzers directory, I am hit with the following error:

~/runtime/src/libraries/Fuzzing/DotnetFuzzing$ dotnet build

  Determining projects to restore...
  Restored /home/oof/runtime/src/libraries/System.Reflection.Metadata/src/System.Reflection.Metadata.csproj (in 390 ms).
  Restored /home/oof/runtime/src/tools/illink/src/ILLink.Tasks/ILLink.Tasks.csproj (in 377 ms).
  Restored /home/oof/runtime/src/libraries/System.Runtime.InteropServices/gen/Microsoft.Interop.SourceGeneration/Microsoft.Interop.SourceGeneration.csproj (in 379 ms).
  Restored /home/oof/runtime/src/libraries/System.Collections.Immutable/src/System.Collections.Immutable.csproj (in 390 ms).
  Restored /home/oof/runtime/src/libraries/System.Formats.Nrbf/src/System.Formats.Nrbf.csproj (in 389 ms).
  Restored /home/oof/runtime/src/libraries/System.Collections.Immutable/ref/System.Collections.Immutable.csproj (in 377 ms).
  Restored /home/oof/runtime/src/tools/illink/src/linker/Mono.Linker.csproj (in 377 ms).
  Restored /home/oof/runtime/src/libraries/System.Reflection.Metadata/ref/System.Reflection.Metadata.csproj (in 377 ms).
  Restored /home/oof/runtime/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceGenerator.csproj (in 379 ms).
  Restored /home/oof/runtime/src/tools/illink/src/linker/ref/Mono.Linker.csproj (in 377 ms).
  Restored /home/oof/runtime/src/libraries/System.Collections/ref/System.Collections.csproj (in 377 ms).
  Restored /home/oof/runtime/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.csproj (in 379 ms).
  Restored /home/oof/runtime/src/libraries/System.Runtime/ref/System.Runtime.csproj (in 3 ms).
  Restored /home/oof/runtime/src/tools/illink/src/ILLink.CodeFix/ILLink.CodeFixProvider.csproj (in 8 ms).
  Restored /home/oof/runtime/src/tools/illink/src/ILLink.RoslynAnalyzer/ILLink.RoslynAnalyzer.csproj (in 10 ms).
  Restored /home/oof/runtime/src/libraries/System.Formats.Nrbf/ref/System.Formats.Nrbf.csproj (in 24 ms).
  Restored /home/oof/runtime/src/libraries/Fuzzing/DotnetFuzzing/DotnetFuzzing.csproj (in 25 ms).
  Restored /home/oof/runtime/src/libraries/System.Runtime.InteropServices/gen/DownlevelLibraryImportGenerator/DownlevelLibraryImportGenerator.csproj (in 8 ms).
/home/oof/runtime/.dotnet/sdk/10.0.100-preview.3.25125.5/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(515,5): error NETSDK1112: The runtime pack for Microsoft.NETCore.App.Runtime.win-x64 was not downloaded. Try running a NuGet restore with the RuntimeIdentifier 'win-x64'. [/home/oof/runtime/src/libraries/Fuzzing/DotnetFuzzing/DotnetFuzzing.csproj]

Build FAILED.

/home/oof/runtime/.dotnet/sdk/10.0.100-preview.3.25125.5/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(515,5): error NETSDK1112: The runtime pack for Microsoft.NETCore.App.Runtime.win-x64 was not downloaded. Try running a NuGet restore with the RuntimeIdentifier 'win-x64'. [/home/oof/runtime/src/libraries/Fuzzing/DotnetFuzzing/DotnetFuzzing.csproj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:03.22

The runtime isn't finding the sdk for some reason.

Reproduction Steps

Repro explained in previous step

Expected behavior

Should compile fuzzers succesfully

Actual behavior

Doesn't compile succesfully. Exits with error.

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response

[MihaZupan]

The setup is currently specific to Windows.

See note in https://github.com/dotnet/runtime/tree/main/src/libraries/Fuzzing readme

Note

The instructions assume you are running on Windows as that is what the continuous fuzzing runs currently use.

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[danmoseley]

Is it something fixable @MihaZupan

[MihaZupan]

Sure, it should be possible, it's "just work".
Having the option to run with AFL or similar could also be interesting (we're using libFuzzer currently).

Other than dev inner loop for Linux, I don't think there's a pressing need for it given that the things we're currently testing shouldn't differ much by OS.

[personnumber3377]

I mean the readme just says that it assumes that you are running windows, not that the fuzzer is windows only. I think it is poorly worded. I am new to dotnet development and I don't really know how to make it work with linux. And I agree that this isn't really needed, but this would be convenient because you don't need to work with visual studio etc. on linux platforms.

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