Auto-generate wasi-types from .wit files

Cargo.toml

@@ -45,6 +45,7 @@ members = [
     "lib/vm",
     "lib/wasi",
     "lib/wasi-types",
+    "lib/wasi-types/wasi-types-generator-extra",
     "lib/wasi-experimental-io-devices",
     "lib/wasi-local-networking",
     "lib/c-api/tests/wasmer-c-api-test-runner",

lib/api/src/js/externals/memory_view.rs

@@ -58,6 +58,35 @@ impl<'a> MemoryView<'a> {
         self.size
     }
 
+    // TODO: do we want a proper implementation here instead?
+    /// Retrieve a slice of the memory contents.
+    ///
+    /// # Safety
+    ///
+    /// Until the returned slice is dropped, it is undefined behaviour to
+    /// modify the memory contents in any way including by calling a wasm
+    /// function that writes to the memory or by resizing the memory.
+    #[doc(hidden)]
+    pub unsafe fn data_unchecked(&self) -> &[u8] {
+        unimplemented!("direct data pointer access is not possible in JavaScript");
+    }
+
+    // TODO: do we want a proper implementation here instead?
+    /// Retrieve a mutable slice of the memory contents.
+    ///
+    /// # Safety
+    ///
+    /// This method provides interior mutability without an UnsafeCell. Until
+    /// the returned value is dropped, it is undefined behaviour to read or
+    /// write to the pointed-to memory in any way except through this slice,
+    /// including by calling a wasm function that reads the memory contents or
+    /// by resizing this Memory.
+    #[allow(clippy::mut_from_ref)]
+    #[doc(hidden)]
+    pub unsafe fn data_unchecked_mut(&self) -> &mut [u8] {
+        unimplemented!("direct data pointer access is not possible in JavaScript");
+    }
+
     /// Returns the size (in [`Pages`]) of the `Memory`.
     ///
     /// # Example

lib/api/src/sys/module.rs

@@ -234,7 +234,9 @@ impl Module {
     }
 
     /// Serializes a module into a binary representation that the `Engine`
-    /// can later process via [`Module::deserialize`].
+    /// can later process via
+    #[cfg_attr(feature = "compiler", doc = "[`Module::deserialize`].")]
+    #[cfg_attr(not(feature = "compiler"), doc = "`Module::deserialize`.")]
     ///
     /// # Usage
     ///
@@ -252,7 +254,9 @@ impl Module {
     }
 
     /// Serializes a module into a file that the `Engine`
-    /// can later process via [`Module::deserialize_from_file`].
+    /// can later process via
+    #[cfg_attr(feature = "compiler", doc = "[`Module::deserialize_from_file`].")]
+    #[cfg_attr(not(feature = "compiler"), doc = "`Module::deserialize_from_file`.")]
     ///
     /// # Usage
     ///

lib/api/src/sys/store.rs

@@ -26,7 +26,9 @@ pub(crate) struct StoreInner {
 ///
 /// The `Store` holds the engine (that is —amongst many things— used to compile
 /// the Wasm bytes into a valid module artifact), in addition to the
-/// [`Tunables`] (that are used to create the memories, tables and globals).
+#[cfg_attr(feature = "compiler", doc = "[`Tunables`]")]
+#[cfg_attr(not(feature = "compiler"), doc = "`Tunables`")]
+/// (that are used to create the memories, tables and globals).
 ///
 /// Spec: <https://webassembly.github.io/spec/core/exec/runtime.html#store>
 pub struct Store {

lib/types/src/value.rs

@@ -98,6 +98,7 @@ macro_rules! primitives {
     )*)
 }
 primitives! {
+    bool
     i8 u8
     i16 u16
     i32 u32

lib/wasi-experimental-io-devices/Cargo.toml

@@ -16,8 +16,8 @@ maintenance = { status = "experimental" }
 [dependencies]
 wasmer-wasi = { version = "=3.0.0-beta.2", path = "../wasi", default-features=false }
 tracing = "0.1"
-minifb = { version = "0.19", optional = true }
-nix = "0.20.2"
+minifb = { version = "0.23", optional = true }
+nix = "0.25.0"
 ref_thread_local = "0.1"
 serde = "1"
 typetag = "0.1"

lib/wasi-experimental-io-devices/src/link-ext.rs

@@ -5,7 +5,10 @@ use std::collections::{BTreeSet, VecDeque};
 use std::convert::TryInto;
 use std::io::{Read, Seek, SeekFrom, Write};
 use tracing::debug;
-use wasmer_wasi::{types::*, WasiInodes};
+use wasmer_wasi::{
+    types::{wasi::Filesize, *},
+    WasiInodes,
+};
 use wasmer_wasi::{Fd, VirtualFile, WasiFs, WasiFsError, ALL_RIGHTS, VIRTUAL_ROOT_FD};
 
 use minifb::{Key, KeyRepeat, MouseButton, Scale, Window, WindowOptions};
@@ -417,7 +420,7 @@ impl VirtualFile for FrameBuffer {
     fn size(&self) -> u64 {
         0
     }
-    fn set_len(&mut self, _new_size: __wasi_filesize_t) -> Result<(), WasiFsError> {
+    fn set_len(&mut self, _new_size: Filesize) -> Result<(), WasiFsError> {
         Ok(())
     }
     fn unlink(&mut self) -> Result<(), WasiFsError> {

lib/wasi-types/.gitignore

@@ -0,0 +1 @@
+wit-bindgen/

lib/wasi-types/Cargo.toml

@@ -10,12 +10,24 @@ license = "MIT"
 readme = "README.md"
 edition = "2018"
 
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
 [dependencies]
+wasmer = { default-features = false, path = "../api", version = "3.0.0-beta" }
+wit-bindgen-rust = { package = "wasmer-wit-bindgen-rust", version = "0.1.1" }
+wit-bindgen-rust-wasm = { package = "wasmer-wit-bindgen-gen-rust-wasm", version = "0.1.1" }
+wit-bindgen-core = { package = "wasmer-wit-bindgen-gen-core", version = "0.1.1" }
+wit-parser = { package = "wasmer-wit-parser", version = "0.1.1" }
 wasmer-types = { path = "../types", version = "=3.0.0-beta.2" }
 wasmer-derive = { path = "../derive", version = "=3.0.0-beta.2" }
 serde = { version = "1.0", features = ["derive"], optional = true }
 byteorder = "1.3"
 time = "0.2"
 
+[dev-dependencies.pretty_assertions]
+version = "1.3.0"
+
 [features]
 enable-serde = ["serde", "wasmer-types/serde"]
+js = ["wasmer/js"]
+sys = ["wasmer/sys"]

lib/wasi-types/README.md

@@ -1,3 +1,11 @@
 # `wasmer-wasi-types` [![Build Status](https://github.com/wasmerio/wasmer/workflows/build/badge.svg?style=flat-square)](https://github.com/wasmerio/wasmer/actions?query=workflow%3Abuild) [![Join Wasmer Slack](https://img.shields.io/static/v1?label=Slack&message=join%20chat&color=brighgreen&style=flat-square)](https://slack.wasmer.io) [![MIT License](https://img.shields.io/github/license/wasmerio/wasmer.svg?style=flat-square)](https://github.com/wasmerio/wasmer/blob/master/LICENSE) [![crates.io](https://img.shields.io/crates/v/wasmer-wasi-types.svg)](https://crates.io/crates/wasmer-wasi-types)
 
 This crate contains the WASI types necessary for `wasmer-wasi`. Please check this crate to learn more!
+
+---
+
+Run `regenerate.sh` to regenerate the wasi-types from
+the `wasi-clean/typenames.wit` into the final Rust bindings.
+
+The `wasi-types-generator-extra` generates some extra code
+that wit-bindgen currently can't provide.

lib/wasi-types/regenerate.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+BASEDIR=$(dirname "$0")
+
+rm -f \
+    "$BASEDIR"/src/bindings.rs \
+    "$BASEDIR"/src/*/bindings.rs
+
+cat "$BASEDIR"/wit-clean/typenames.wit "$BASEDIR"/wit-clean/wasi_unstable.wit > "$BASEDIR"/wit-clean/output.wit
+
+git clone https://github.com/wasmerio/wit-bindgen --branch force-generate-structs --single-branch
+git pull origin force-generate-structs
+cd wit-bindgen
+cargo build
+cd ..
+
+./wit-bindgen/target/debug/wit-bindgen rust-wasm \
+    --import "$BASEDIR"/wit-clean/output.wit \
+    --force-generate-structs \
+    --out-dir "$BASEDIR"/src/wasi \
+
+awk '{sub(/mod output/,"pub mod output")}1' src/wasi/bindings.rs > src/wasi/bindings2.rs
+cargo fmt --all
+cp src/wasi/bindings2.rs src/wasi/bindings.rs
+rm src/wasi/bindings2.rs
+
+cd ./wasi-types-generator-extra
+cargo build
+pwd
+../../../target/debug/wasi-types-generator-extra
+cd ..
+
+cargo fmt --all