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//! Example of enabling debuginfo for wasm code which allows interactive
//! debugging of the wasm code. When using recent versions of LLDB
//! you can debug this executable and set breakpoints in wasm code and look at
//! the rust source code as input.
// To execute this example you'll need to run two commands:
//
// cargo build -p example-fib-debug-wasm --target wasm32-unknown-unknown
// cargo run --example fib-debug
use wasmtime::*;
fn main() -> Result<()> {
// Load our previously compiled wasm file (built previously with Cargo) and
// also ensure that we generate debuginfo so this executable can be
// debugged in GDB.
let engine = Engine::new(
Config::new()
.debug_info(true)
.cranelift_opt_level(OptLevel::None),
)?;
let mut store = Store::new(&engine, ());
let module = Module::from_file(&engine, "target/wasm32-unknown-unknown/debug/fib.wasm")?;
let instance = Instance::new(&mut store, &module, &[])?;
// Invoke `fib` export
let fib = instance.get_typed_func::<i32, i32>(&mut store, "fib")?;
println!("fib(6) = {}", fib.call(&mut store, 6)?);
Ok(())
}
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