3715e19c67
* Reactor support. This implements the new WASI ABI described here: https://github.com/WebAssembly/WASI/blob/master/design/application-abi.md It adds APIs to `Instance` and `Linker` with support for running WASI programs, and also simplifies the process of instantiating WASI API modules. This currently only includes Rust API support. * Add comments and fix a typo in a comment. * Fix a rustdoc warning. * Tidy an unneeded `mut`. * Factor out instance initialization with `NewInstance`. This also separates instantiation from initialization in a manner similar to https://github.com/bytecodealliance/lucet/pull/506. * Update fuzzing oracles for the API changes. * Remove `wasi_linker` and clarify that Commands/Reactors aren't connected to WASI. * Move Command/Reactor semantics into the Linker. * C API support. * Fix fuzzer build. * Update usage syntax from "::" to "=". * Remove `NewInstance` and `start()`. * Elaborate on Commands and Reactors and add a spec link. * Add more comments. * Fix wat syntax. * Fix wat. * Use the `Debug` formatter to format an anyhow::Error. * Fix wat.
27 lines
870 B
Rust
27 lines
870 B
Rust
//! Example of instantiating of instantiating a wasm module which uses WASI
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//! imports.
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// You can execute this example with `cargo run --example wasi`
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use anyhow::Result;
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use wasmtime::*;
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use wasmtime_wasi::{Wasi, WasiCtx};
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fn main() -> Result<()> {
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let store = Store::default();
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let mut linker = Linker::new(&store);
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// Create an instance of `Wasi` which contains a `WasiCtx`. Note that
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// `WasiCtx` provides a number of ways to configure what the target program
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// will have access to.
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let wasi = Wasi::new(&store, WasiCtx::new(std::env::args())?);
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wasi.add_to_linker(&mut linker)?;
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// Instantiate our module with the imports we've created, and run it.
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let module = Module::from_file(&store, "target/wasm32-wasi/debug/wasi.wasm")?;
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linker.module("", &module)?;
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linker.get_default("")?.get0::<()>()?()?;
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Ok(())
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}
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