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C#•2y ago

❔ ✅ Unhandled Exception: EETypeRva:0x0017C798: Reflection_Disabled on startup?

Hi all! I'm trying to build an AOT-compiled project with reflection disabled, using <IlcDisableReflection>true</IlcDisableReflection>. However, I'm getting the following exception on startup:

Unhandled Exception: EETypeRva:0x0017C798: Reflection_Disabled
   at Internal.Reflection.RuntimeTypeInfo.get_GUID() + 0x33
   at SharpGenModuleInitializer.Initialize() + 0x3c9
   at Internal.Runtime.CompilerHelpers.StartupCodeHelpers.RunInitializers(TypeManagerHandle, ReadyToRunSectionType) + 0x45
   at Internal.Runtime.CompilerHelpers.StartupCodeHelpers.RunModuleInitializers() + 0x39
   at [PROJECT NAME]!<BaseAddress>+0x128c3e

Unhandled Exception: EETypeRva:0x0017C798: Reflection_Disabled
   at Internal.Reflection.RuntimeTypeInfo.get_GUID() + 0x33
   at SharpGenModuleInitializer.Initialize() + 0x3c9
   at Internal.Runtime.CompilerHelpers.StartupCodeHelpers.RunInitializers(TypeManagerHandle, ReadyToRunSectionType) + 0x45
   at Internal.Runtime.CompilerHelpers.StartupCodeHelpers.RunModuleInitializers() + 0x39
   at [PROJECT NAME]!<BaseAddress>+0x128c3e

The project compiles fine without IlcDisableReflection. This exception only appeared when I added GUI functionality to my project with the help of ImGui.NET. The NuGet packages I'm using are:

ImGui.NET
SixLabors.ImageSharp
Vortice.D3DCompiler
Vortice.Direct3D11
Vortice.DXGI

ImGui.NET
SixLabors.ImageSharp
Vortice.D3DCompiler
Vortice.Direct3D11
Vortice.DXGI

Can anyone help me out? Thanks in advance! catlove

catlove

40 Replies

ascpixiOP•2y ago

hmmm, looks like this comes from a generated class in here: https://github.com/SharpGenTools/SharpGenTools/blob/461a942deb05c6f82489d11eccfb3c05b2d85def/SharpGen.Generator/SharpGenModuleGenerator.GenerateModule.cs#L237

GitHub

SharpGenTools/SharpGenModuleGenerator.GenerateModule.cs at 461a942d...

Accurate and high performance C++ interop code generator for C#. - SharpGenTools/SharpGenModuleGenerator.GenerateModule.cs at 461a942deb05c6f82489d11eccfb3c05b2d85def · SharpGenTools/SharpGenTools

reflectronic•2y ago

if i may, i would suggest using TerraFX.Introp.Windows instead of Vortice it does not do any reflection

ascpixiOP•2y ago

i looked into it but Vortice simplified a lot of things

ascpixiOP•2y ago

like i'm not sure what to do here

ascpixiOP•2y ago

(i mean what's the "correct" way to get IDXGIFactory)

reflectronic•2y ago

using ComPtr<IDXGIDevice> dxgiDevice = default;
HRESULT hr = device.QueryInterface(Windows.__uuidof<IDXGIDevice>(), (void**)dxgiDevice.GetAddressOf());

using ComPtr<IDXGIDevice> dxgiDevice = default;
HRESULT hr = device.QueryInterface(Windows.__uuidof<IDXGIDevice>(), (void**)dxgiDevice.GetAddressOf());

ascpixiOP•2y ago

thats kinda scary but thanks! :p

reflectronic•2y ago

or, rather using var dxgiDevice = device.As<IDXGIDevice>() sorry, i forgot about that uh

using ComPtr<IDXGIDevice> dxgiDevice = default;
HRESULT hr = device.As(&dxgiDevice);

using ComPtr<IDXGIDevice> dxgiDevice = default;
HRESULT hr = device.As(&dxgiDevice);

that's what i meant it has been a while

ascpixiOP•2y ago

uuuum i don't have an As method ^^'>

reflectronic•2y ago

oh

ascpixiOP•2y ago

i'm porting this from vortice code so the types remained the same

ascpixiOP•2y ago

(for context)

reflectronic•2y ago

oh, i see yeah, it's going to be painful

ascpixiOP•2y ago

:( i was thinking of making an IL weaving shim that just replaces all System.Type.GUID accesses with a GUID that's generated using the runtime type handle lol

reflectronic•2y ago

is there a reason you want to use IlcDisableReflection

ascpixiOP•2y ago

but then i noticed it has so much more reflection code scattered everywhere mainly to protect the source code, i guess w/ a hex editor i noticed that all type names and stuff like that are included in the executable (which is expected behavior of course) it would be nice to have something like "partial reflection" XD maybe something like a [DontReflect] attribute so i could mark my codebase as "please dont include type info of this assembly ty <3" i guess i could use an obfuscator..... but i figured that i'd try doing it without reflection first

reflectronic•2y ago

to be clear, the NativeAOT compiler only keeps required reflection metadata so if it's in the executable it's because there are codepaths that will use it

ascpixiOP•2y ago

sooo if i just obfuscate the names of all members + types + namespaces, that would be enough to protect something from reverse engineering? (i know that with enough patience everything can be reverse engineered but i just want to dismay casual onlookers i guess lol)

reflectronic•2y ago

the casual onlookers will already be dismayed because there is no IL and the native code will be incomprehensible in any binary reverse engineering toolkit you can find, becuase none of them are tuned for RyuJIT. which will dismay almost all of the less casual ones i mean. renaming everything is free and easy. so, sure, why not but you are already reaching the tail end of protections here

ascpixiOP•2y ago

yeah i already have IL weaving set-up for string encryption so i think i can easily plug member name obfuscation in there i guess i was a bit paranoid about reflection giving away a bit too much info lol alright, thanks for the help!!

reflectronic•2y ago

you can probably try to debug why the reflection metadata is being preserved

ascpixiOP•2y ago

i mean stuff that wasnt used wasnt included so that was working correctly

reflectronic•2y ago

stuff that is used but not by reflection should not be included

ascpixiOP•2y ago

it was just that it included names of internal classes so i was a bit spooked ;P

reflectronic•2y ago

the compiler will remove the name and metadata for a method while keeping its native code if it sees that the method is never accessed with reflection. (same for classes and so on) so if it's there, something is keeping it there. which means reflection-free was broken anyway (and, i know this is a bit of a dumb question, but... are you sure you turned off stack trace metadata as well)

ascpixiOP•2y ago

uuuuuuuuuhhh weeelll lets just say i forgot to do that because i disabled reflection and that took care of it XD

reflectronic•2y ago

you may want to try with <IlcGenerateStackTraceData>false</IlcGenerateStackTraceData> and see how many strings are there it is harmless, your exception stack traces will just be mostly offsets instead of names

ascpixiOP•2y ago

i see theres a lot of fancy properties like that

ascpixiOP•2y ago

is there documentation that lists them?

reflectronic•2y ago

everything that begins with Ilc is not "officially" supported but there is some "internal" documentation about the flags here https://github.com/dotnet/runtime/tree/c32bee11a457151e5c400107ababed54dcd70438/src/coreclr/nativeaot/docs

ascpixiOP•2y ago

yeye i saw that but i couldnt find any docs about IlcScanReflection for example IlcGenerateStackData was on the optimization page

reflectronic•2y ago

the reflection-free mode is sort of a dud. it breaks all sorts of code that is not even related to reflection, like HttpClient, Process.Start, some crypto stuff, there's more. if you can get it to work without using it then your day will be much brighter and you will be able to use Vortice

ascpixiOP•2y ago

oh, i see...

reflectronic•2y ago

i mean. it breaks them because they use reflection. it's just that you wouldn't expect it

ascpixiOP•2y ago

yeah i've given up on reflection-free mode, it'll be less painful to use reflection rather than try to port all the DX code I have from Vortice to TerraFX lol

reflectronic•2y ago

honestly i would rather spend a day tweaking build properties than spending a day rewriting everything in TerraFX it's just painful, i would rather use C or C++ for these the documentation is the source code IlcScanReflection controls the thing that scans for reflection patterns (the thing that determines whether to keep reflection metadata for each member). i don't know what will happen if you set it to false

ascpixiOP•2y ago

eh i mean i'm used to reading the runtime docs at this point when i was writing my own bare metal runtime xd

reflectronic•2y ago

it won't burn your computer so i suppose there is no harm in trying it

ascpixiOP•2y ago

(it still would be nicer to have a markdown file listing it just sayiinggggg ⚆_⚆)

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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