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Unable to debug code loaded in more than one ALC

See original GitHub issue

Consider this setup:

Library1
Plugin1 (depend on Library1, via project reference)
Plugin2 (depend on Library1, via project reference)
Host (console app)

Host is using PluginLoader.CreateFromAssemblyFile(pluginPath) to load both plugin assemblies, and calls a “startup” method in them. Plugins call a common method in Library1.

No shared types and no custom options in use.

If I debug the host, I can step Host -> Plugin -> Library1 when the first plugin is loaded. But when the second one is, I can not step into method of Library1. Also, I see a message (in Debug Output) that Library1 from path of Plugin can’t load. (Using VS Code to debug, but tested VS 17 too). That part is also confusing, since why shouldn’t it load in the second ALC?

Let me know if you want me to craft a repro.

Issue Analytics

State:
Created 5 years ago
Comments:5 (5 by maintainers)

Top GitHub Comments

1reaction

natemcmastercommented, Nov 27, 2018

Thanks for sharing. I’m going to close this in favor of https://github.com/dotnet/coreclr/issues/20607

1reaction

natemcmastercommented, Nov 26, 2018

This seems like a bug in .NET Core itself and the way AssemblyLoadContext works. This library doesn’t do anything special with symbols, or do anything to prevent symbols from loading. If there is something this library needs to do to help IDE’s find symbols, I’m happy to add that, but I don’t know what that would be.

I would recommend opening a bug on github.com/dotnet/core to see if the coreclr team can help with this.

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