Function eval

crates/fuzzing/src/oracles/diff_v8.rs:273–292

Evaluates the JS `code` within `scope`, returning either the result of the computation or the stringified exception if one happened.

(scope: &mut v8::HandleScope<'s>, code: &str)

/// Evaluates the JS `code` within `scope`, returning either the result of the
/// computation or the stringified exception if one happened.
fn eval<'s>(scope: &mut v8::HandleScope<'s>, code: &str) -> Result<v8::Local<'s, v8::Value>> {
    let mut tc = v8::TryCatch::new(scope);
    let mut scope = v8::EscapableHandleScope::new(&mut tc);
    let source = v8::String::new(&mut scope, code).unwrap();
    let script = v8::Script::compile(&mut scope, source, None).unwrap();
    match script.run(&mut scope) {
        Some(val) => Ok(scope.escape(val)),
        None => {
            drop(scope);
            assert!(tc.has_caught());
            bail!(
                "{}",
                tc.message()
                    .unwrap()
                    .get(&mut tc)
                    .to_rust_string_lossy(&mut tc)
            )
        }
    }
}

fn get_diff_value(
    val: &v8::Local<'_, v8::Value>,