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38 lines
1.3 KiB
38 lines
1.3 KiB
//! Small example of how you can interrupt the execution of a wasm module to
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//! ensure that it doesn't run for too long.
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// You can execute this example with `cargo run --example interrupt`
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use anyhow::Result;
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use wasmtime::*;
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fn main() -> Result<()> {
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// Enable interruptable code via `Config` and then create an interrupt
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// handle which we'll use later to interrupt running code.
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let engine = Engine::new(Config::new().interruptable(true));
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let store = Store::new(&engine);
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let interrupt_handle = store.interrupt_handle()?;
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// Compile and instantiate a small example with an infinite loop.
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let module = Module::from_file(&engine, "examples/interrupt.wat")?;
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let instance = Instance::new(&store, &module, &[])?;
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let run = instance
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.get_func("run")
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.ok_or(anyhow::format_err!("failed to find `run` function export"))?
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.get0::<()>()?;
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// Spin up a thread to send us an interrupt in a second
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std::thread::spawn(move || {
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std::thread::sleep(std::time::Duration::from_secs(1));
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println!("Interrupting!");
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interrupt_handle.interrupt();
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});
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println!("Entering infinite loop ...");
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let trap = run().unwrap_err();
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println!("trap received...");
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assert!(trap.to_string().contains("wasm trap: interrupt"));
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Ok(())
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}
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