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34 lines
1.2 KiB
34 lines
1.2 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 wasmtime::*;
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fn main() -> Result<()> {
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// Enable epoch interruption code via `Config` which means that code will
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// get interrupted when `Engine::increment_epoch` happens.
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let engine = Engine::new(Config::new().epoch_interruption(true))?;
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let mut store = Store::new(&engine, ());
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store.set_epoch_deadline(1);
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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(&mut store, &module, &[])?;
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let run = instance.get_typed_func::<(), ()>(&mut store, "run")?;
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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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engine.increment_epoch();
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});
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println!("Entering infinite loop ...");
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let err = run.call(&mut store, ()).unwrap_err();
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println!("trap received...");
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assert_eq!(err.downcast::<Trap>()?, Trap::Interrupt);
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Ok(())
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}
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