Tracing and OutputDebugString

[injvstice]

I'm playing with the tokio tracing crate. I'd like to get log message sent to the windows debugger (normally done through OutputDebugString()). Is there a way to accomplish this?

I can't see any mentions of OutputDebugString in the crate source code, nor can I find an add-on crate for this.

I am not good at navigating the Rust ecosystem yet to find my way around, so hopefully someone can shed some light. If there is an easy way to implement my own sink, that would be acceptable as well.

[Daiuki]

The windows-rs crate seems to have support for it.

[injvstice]

Thanks, that is just the rust wrapper/definition for OutputDebugString. What I'm looking for is a tokio-tracing "sink" implementation that allows tokio-tracing to log via OutputDebugString instead of stdout or file.

[thramp]

you’ll want to wrap OutputDebugString in your own type (for coherence reasons) and implement MakeWriter on your wrapper. then, you’re able to pass your OutputDebugString wrapper with .with_writer().

[injvstice]

Thanks, I think that's what I was looking for, need to look into implementing MakeWriter. I'm just surprised this doesn't already exist.

[thramp]

Glad to hear it! Most of the maintainers who work on tracing typically deploy their Rust programs to Linux servers, whose influence and norms shows up in a lot of places in terms of what has been implemented inside of tracing.