File: simple-wasi_tracing_async.rs

package info (click to toggle)
rust-wasmtime 26.0.1%2Bdfsg-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 48,492 kB
  • sloc: ansic: 4,003; sh: 561; javascript: 542; cpp: 254; asm: 175; ml: 96; makefile: 55
file content (380 lines) | stat: -rw-r--r-- 15,040 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
/// Auto-generated bindings for a pre-instantiated version of a
/// component which implements the world `wasi`.
///
/// This structure is created through [`WasiPre::new`] which
/// takes a [`InstancePre`](wasmtime::component::InstancePre) that
/// has been created through a [`Linker`](wasmtime::component::Linker).
///
/// For more information see [`Wasi`] as well.
pub struct WasiPre<T> {
    instance_pre: wasmtime::component::InstancePre<T>,
    indices: WasiIndices,
}
impl<T> Clone for WasiPre<T> {
    fn clone(&self) -> Self {
        Self {
            instance_pre: self.instance_pre.clone(),
            indices: self.indices.clone(),
        }
    }
}
impl<_T> WasiPre<_T> {
    /// Creates a new copy of `WasiPre` 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 = WasiIndices::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 [`Wasi`] 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<Wasi>
    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
/// `wasi`.
///
/// This is an implementation detail of [`WasiPre`] and can
/// be constructed if needed as well.
///
/// For more information see [`Wasi`] as well.
#[derive(Clone)]
pub struct WasiIndices {}
/// Auto-generated bindings for an instance a component which
/// implements the world `wasi`.
///
/// 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
///   [`Wasi::instantiate_async`] which only needs a
///   [`Store`], [`Component`], and [`Linker`].
///
/// * Alternatively you can create a [`WasiPre`] ahead of
///   time with a [`Component`] to front-load string lookups
///   of exports once instead of per-instantiation. This
///   method then uses [`WasiPre::instantiate_async`] to
///   create a [`Wasi`].
///
/// * If you've instantiated the instance yourself already
///   then you can use [`Wasi::new`].
///
/// * You can also access the guts of instantiation through
///   [`WasiIndices::new_instance`] followed
///   by [`WasiIndices::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 Wasi {}
const _: () = {
    #[allow(unused_imports)]
    use wasmtime::component::__internal::anyhow;
    impl WasiIndices {
        /// Creates a new copy of `WasiIndices` 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(WasiIndices {})
        }
        /// Creates a new instance of [`WasiIndices`] from an
        /// instantiated component.
        ///
        /// This method of creating a [`Wasi`] will perform string
        /// lookups for all exports when this method is called. This
        /// will only succeed if the provided instance matches the
        /// requirements of [`Wasi`].
        pub fn new_instance(
            mut store: impl wasmtime::AsContextMut,
            instance: &wasmtime::component::Instance,
        ) -> wasmtime::Result<Self> {
            let _instance = instance;
            Ok(WasiIndices {})
        }
        /// Uses the indices stored in `self` to load an instance
        /// of [`Wasi`] 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<Wasi> {
            let _instance = instance;
            Ok(Wasi {})
        }
    }
    impl Wasi {
        /// Convenience wrapper around [`WasiPre::new`] and
        /// [`WasiPre::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<Wasi>
        where
            _T: Send,
        {
            let pre = linker.instantiate_pre(component)?;
            WasiPre::new(pre)?.instantiate_async(store).await
        }
        /// Convenience wrapper around [`WasiIndices::new_instance`] and
        /// [`WasiIndices::load`].
        pub fn new(
            mut store: impl wasmtime::AsContextMut,
            instance: &wasmtime::component::Instance,
        ) -> wasmtime::Result<Wasi> {
            let indices = WasiIndices::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: foo::foo::wasi_filesystem::Host + foo::foo::wall_clock::Host + Send,
        {
            foo::foo::wasi_filesystem::add_to_linker(linker, get)?;
            foo::foo::wall_clock::add_to_linker(linker, get)?;
            Ok(())
        }
    }
};
pub mod foo {
    pub mod foo {
        #[allow(clippy::all)]
        pub mod wasi_filesystem {
            #[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 DescriptorStat {}
            impl core::fmt::Debug for DescriptorStat {
                fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
                    f.debug_struct("DescriptorStat").finish()
                }
            }
            const _: () = {
                assert!(
                    0 == < DescriptorStat as wasmtime::component::ComponentType >::SIZE32
                );
                assert!(
                    1 == < DescriptorStat as wasmtime::component::ComponentType
                    >::ALIGN32
                );
            };
            #[derive(wasmtime::component::ComponentType)]
            #[derive(wasmtime::component::Lift)]
            #[derive(wasmtime::component::Lower)]
            #[component(enum)]
            #[derive(Clone, Copy, Eq, PartialEq)]
            #[repr(u8)]
            pub enum Errno {
                #[component(name = "e")]
                E,
            }
            impl Errno {
                pub fn name(&self) -> &'static str {
                    match self {
                        Errno::E => "e",
                    }
                }
                pub fn message(&self) -> &'static str {
                    match self {
                        Errno::E => "",
                    }
                }
            }
            impl core::fmt::Debug for Errno {
                fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
                    f.debug_struct("Errno")
                        .field("code", &(*self as i32))
                        .field("name", &self.name())
                        .field("message", &self.message())
                        .finish()
                }
            }
            impl core::fmt::Display for Errno {
                fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
                    write!(f, "{} (error {})", self.name(), * self as i32)
                }
            }
            impl std::error::Error for Errno {}
            const _: () = {
                assert!(1 == < Errno as wasmtime::component::ComponentType >::SIZE32);
                assert!(1 == < Errno as wasmtime::component::ComponentType >::ALIGN32);
            };
            #[wasmtime::component::__internal::async_trait]
            pub trait Host: Send {
                async fn create_directory_at(&mut self) -> Result<(), Errno>;
                async fn stat(&mut self) -> Result<DescriptorStat, Errno>;
            }
            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("foo:foo/wasi-filesystem")?;
                inst.func_wrap_async(
                    "create-directory-at",
                    move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
                        use tracing::Instrument;
                        let span = tracing::span!(
                            tracing::Level::TRACE, "wit-bindgen import", module =
                            "wasi-filesystem", function = "create-directory-at",
                        );
                        wasmtime::component::__internal::Box::new(
                            async move {
                                tracing::event!(tracing::Level::TRACE, "call");
                                let host = &mut host_getter(caller.data_mut());
                                let r = Host::create_directory_at(host).await;
                                tracing::event!(
                                    tracing::Level::TRACE, result = tracing::field::debug(& r),
                                    "return"
                                );
                                Ok((r,))
                            }
                                .instrument(span),
                        )
                    },
                )?;
                inst.func_wrap_async(
                    "stat",
                    move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
                        use tracing::Instrument;
                        let span = tracing::span!(
                            tracing::Level::TRACE, "wit-bindgen import", module =
                            "wasi-filesystem", function = "stat",
                        );
                        wasmtime::component::__internal::Box::new(
                            async move {
                                tracing::event!(tracing::Level::TRACE, "call");
                                let host = &mut host_getter(caller.data_mut());
                                let r = Host::stat(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 create_directory_at(&mut self) -> Result<(), Errno> {
                    Host::create_directory_at(*self).await
                }
                async fn stat(&mut self) -> Result<DescriptorStat, Errno> {
                    Host::stat(*self).await
                }
            }
        }
        #[allow(clippy::all)]
        pub mod wall_clock {
            #[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("foo:foo/wall-clock")?;
                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 {}
        }
    }
}