32 lines
1.0 KiB
Rust
32 lines
1.0 KiB
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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tracing_subscriber::FmtSubscriber::builder()
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.with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
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.with_ansi(true)
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.init();
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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.engine(), "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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