Use instrument in generated call_ functions

crates/component-macro/tests/expanded.rs

@@ -14,6 +14,13 @@ macro_rules! genexpand {
             async: true,
             stringify: true,
         }))?;
+
+        process_expanded($path, "_tracing_async", wasmtime::component::bindgen!({
+            path: $path,
+            async: true,
+            tracing: true,
+            stringify: true,
+        }))?;
     };
 }
 

crates/component-macro/tests/expanded/dead-code_tracing_async.rs

@@ -0,0 +1,313 @@
+/// Auto-generated bindings for a pre-instantiated version of a
+/// component which implements the world `imports`.
+///
+/// This structure is created through [`ImportsPre::new`] which
+/// takes a [`InstancePre`](wasmtime::component::InstancePre) that
+/// has been created through a [`Linker`](wasmtime::component::Linker).
+///
+/// For more information see [`Imports`] as well.
+pub struct ImportsPre<T> {
+    instance_pre: wasmtime::component::InstancePre<T>,
+    indices: ImportsIndices,
+}
+impl<T> Clone for ImportsPre<T> {
+    fn clone(&self) -> Self {
+        Self {
+            instance_pre: self.instance_pre.clone(),
+            indices: self.indices.clone(),
+        }
+    }
+}
+impl<_T> ImportsPre<_T> {
+    /// Creates a new copy of `ImportsPre` bindings which can then
+    /// be used to instantiate into a particular store.
+    ///
+    /// This method may fail if the component behind `instance_pre`
+    /// does not have the required exports.
+    pub fn new(
+        instance_pre: wasmtime::component::InstancePre<_T>,
+    ) -> wasmtime::Result<Self> {
+        let indices = ImportsIndices::new(instance_pre.component())?;
+        Ok(Self { instance_pre, indices })
+    }
+    pub fn engine(&self) -> &wasmtime::Engine {
+        self.instance_pre.engine()
+    }
+    pub fn instance_pre(&self) -> &wasmtime::component::InstancePre<_T> {
+        &self.instance_pre
+    }
+    /// Instantiates a new instance of [`Imports`] within the
+    /// `store` provided.
+    ///
+    /// This function will use `self` as the pre-instantiated
+    /// instance to perform instantiation. Afterwards the preloaded
+    /// indices in `self` are used to lookup all exports on the
+    /// resulting instance.
+    pub async fn instantiate_async(
+        &self,
+        mut store: impl wasmtime::AsContextMut<Data = _T>,
+    ) -> wasmtime::Result<Imports>
+    where
+        _T: Send,
+    {
+        let mut store = store.as_context_mut();
+        let instance = self.instance_pre.instantiate_async(&mut store).await?;
+        self.indices.load(&mut store, &instance)
+    }
+}
+/// Auto-generated bindings for index of the exports of
+/// `imports`.
+///
+/// This is an implementation detail of [`ImportsPre`] and can
+/// be constructed if needed as well.
+///
+/// For more information see [`Imports`] as well.
+#[derive(Clone)]
+pub struct ImportsIndices {}
+/// Auto-generated bindings for an instance a component which
+/// implements the world `imports`.
+///
+/// This structure can be created through a number of means
+/// depending on your requirements and what you have on hand:
+///
+/// * The most convenient way is to use
+///   [`Imports::instantiate_async`] which only needs a
+///   [`Store`], [`Component`], and [`Linker`].
+///
+/// * Alternatively you can create a [`ImportsPre`] ahead of
+///   time with a [`Component`] to front-load string lookups
+///   of exports once instead of per-instantiation. This
+///   method then uses [`ImportsPre::instantiate_async`] to
+///   create a [`Imports`].
+///
+/// * If you've instantiated the instance yourself already
+///   then you can use [`Imports::new`].
+///
+/// * You can also access the guts of instantiation through
+///   [`ImportsIndices::new_instance`] followed
+///   by [`ImportsIndices::load`] to crate an instance of this
+///   type.
+///
+/// These methods are all equivalent to one another and move
+/// around the tradeoff of what work is performed when.
+///
+/// [`Store`]: wasmtime::Store
+/// [`Component`]: wasmtime::component::Component
+/// [`Linker`]: wasmtime::component::Linker
+pub struct Imports {}
+const _: () = {
+    #[allow(unused_imports)]
+    use wasmtime::component::__internal::anyhow;
+    impl ImportsIndices {
+        /// Creates a new copy of `ImportsIndices` bindings which can then
+        /// be used to instantiate into a particular store.
+        ///
+        /// This method may fail if the component does not have the
+        /// required exports.
+        pub fn new(
+            component: &wasmtime::component::Component,
+        ) -> wasmtime::Result<Self> {
+            let _component = component;
+            Ok(ImportsIndices {})
+        }
+        /// Creates a new instance of [`ImportsIndices`] from an
+        /// instantiated component.
+        ///
+        /// This method of creating a [`Imports`] will perform string
+        /// lookups for all exports when this method is called. This
+        /// will only succeed if the provided instance matches the
+        /// requirements of [`Imports`].
+        pub fn new_instance(
+            mut store: impl wasmtime::AsContextMut,
+            instance: &wasmtime::component::Instance,
+        ) -> wasmtime::Result<Self> {
+            let _instance = instance;
+            Ok(ImportsIndices {})
+        }
+        /// Uses the indices stored in `self` to load an instance
+        /// of [`Imports`] from the instance provided.
+        ///
+        /// Note that at this time this method will additionally
+        /// perform type-checks of all exports.
+        pub fn load(
+            &self,
+            mut store: impl wasmtime::AsContextMut,
+            instance: &wasmtime::component::Instance,
+        ) -> wasmtime::Result<Imports> {
+            let _instance = instance;
+            Ok(Imports {})
+        }
+    }
+    impl Imports {
+        /// Convenience wrapper around [`ImportsPre::new`] and
+        /// [`ImportsPre::instantiate_async`].
+        pub async fn instantiate_async<_T>(
+            mut store: impl wasmtime::AsContextMut<Data = _T>,
+            component: &wasmtime::component::Component,
+            linker: &wasmtime::component::Linker<_T>,
+        ) -> wasmtime::Result<Imports>
+        where
+            _T: Send,
+        {
+            let pre = linker.instantiate_pre(component)?;
+            ImportsPre::new(pre)?.instantiate_async(store).await
+        }
+        /// Convenience wrapper around [`ImportsIndices::new_instance`] and
+        /// [`ImportsIndices::load`].
+        pub fn new(
+            mut store: impl wasmtime::AsContextMut,
+            instance: &wasmtime::component::Instance,
+        ) -> wasmtime::Result<Imports> {
+            let indices = ImportsIndices::new_instance(&mut store, instance)?;
+            indices.load(store, instance)
+        }
+        pub fn add_to_linker<T, U>(
+            linker: &mut wasmtime::component::Linker<T>,
+            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        ) -> wasmtime::Result<()>
+        where
+            T: Send,
+            U: a::b::interface_with_live_type::Host
+                + a::b::interface_with_dead_type::Host + Send,
+        {
+            a::b::interface_with_live_type::add_to_linker(linker, get)?;
+            a::b::interface_with_dead_type::add_to_linker(linker, get)?;
+            Ok(())
+        }
+    }
+};
+pub mod a {
+    pub mod b {
+        #[allow(clippy::all)]
+        pub mod interface_with_live_type {
+            #[allow(unused_imports)]
+            use wasmtime::component::__internal::anyhow;
+            #[derive(wasmtime::component::ComponentType)]
+            #[derive(wasmtime::component::Lift)]
+            #[derive(wasmtime::component::Lower)]
+            #[component(record)]
+            #[derive(Clone, Copy)]
+            pub struct LiveType {
+                #[component(name = "a")]
+                pub a: u32,
+            }
+            impl core::fmt::Debug for LiveType {
+                fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+                    f.debug_struct("LiveType").field("a", &self.a).finish()
+                }
+            }
+            const _: () = {
+                assert!(4 == < LiveType as wasmtime::component::ComponentType >::SIZE32);
+                assert!(
+                    4 == < LiveType as wasmtime::component::ComponentType >::ALIGN32
+                );
+            };
+            #[wasmtime::component::__internal::async_trait]
+            pub trait Host: Send {
+                async fn f(&mut self) -> LiveType;
+            }
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()>
+            where
+                T: Send,
+            {
+                let mut inst = linker.instance("a:b/interface-with-live-type")?;
+                inst.func_wrap_async(
+                    "f",
+                    move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
+                        use tracing::Instrument;
+                        let span = tracing::span!(
+                            tracing::Level::TRACE, "wit-bindgen import", module =
+                            "interface-with-live-type", function = "f",
+                        );
+                        wasmtime::component::__internal::Box::new(
+                            async move {
+                                tracing::event!(tracing::Level::TRACE, "call");
+                                let host = &mut host_getter(caller.data_mut());
+                                let r = Host::f(host).await;
+                                tracing::event!(
+                                    tracing::Level::TRACE, result = tracing::field::debug(& r),
+                                    "return"
+                                );
+                                Ok((r,))
+                            }
+                                .instrument(span),
+                        )
+                    },
+                )?;
+                Ok(())
+            }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn f(&mut self) -> LiveType {
+                    Host::f(*self).await
+                }
+            }
+        }
+        #[allow(clippy::all)]
+        pub mod interface_with_dead_type {
+            #[allow(unused_imports)]
+            use wasmtime::component::__internal::anyhow;
+            #[wasmtime::component::__internal::async_trait]
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()>
+            where
+                T: Send,
+            {
+                let mut inst = linker.instance("a:b/interface-with-dead-type")?;
+                Ok(())
+            }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
+        }
+    }
+}