2210: Tracing printouts for FFI calls #2211
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jplatte
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Aug 9, 2024
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Added the `uniffi:ffi-trace` feature. If enabled, UniFFI will printout tracing-level logs for FFI calls. I hooked up the futures code to this, in the future we could also log more stuff. Lowering/lifting/cloning arcs is the first example that comes to mind. To see tracing, use the `--features=ffi-trace` when running a tests, for example: - `cd fixtures/futures/src` - `cargo test --features=ffi-trace` Here's an example of the tracing printouts when running tests from the futures fixtures: ``` rust_future_new: Handle(94402427620656) rust_future_poll: Handle(94402427620656) RustFuture::wake called rust_future_poll: Handle(94402427620656) RustFuture::poll is ready (canceled: false) rust_future_complete: Handle(94402427620656) rust_future_free: Handle(94402427620656) ```
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Added the
uniffi:ffi-tracefeature. If enabled, UniFFI will printout tracing-level logs for FFI calls. I hooked up the futures code to this, in the future we could also log more stuff. Lowering/lifting/cloning arcs is the first example that comes to mind.To see tracing, use the
--features=ffi-tracewhen running a tests, for example:cd fixtures/futures/srccargo test --features=ffi-traceHere's an example of the tracing printouts when running tests from the futures fixtures: