Method init

hail-fuzz/src/i2s/replacement.rs:27–58

(fuzzer: &mut Fuzzer)

impl I2SRandomReplacement {
    pub fn init(fuzzer: &mut Fuzzer) -> Option<Self> {
        let input_id = fuzzer.input_id?;
        tracing::debug!("[{input_id}] multi-stream extend input-to-state stage");

        Snapshot::restore_initial(fuzzer);
        fuzzer.state.input.seek_to_start();

        let (_, comparisons) = finder::capture_comparisons(fuzzer)?;
        if fuzzer.debug.cmplog && fuzzer.global.is_main_instance() {
            if let Some(cmplog) = fuzzer.cmplog {
                let _ = log_cmplog_data(
                    &mut fuzzer.vm,
                    cmplog,
                    &fuzzer.workdir.join(format!("cmplog/{input_id}.ext.cmplog.txt")),
                );
            }
        }

        let mut streams = get_non_empty_streams(&fuzzer.state.input);
        streams.retain(|&(addr, _)| !crate::utils::is_interrupt_stream(addr));
        if streams.is_empty() {
            return None;
        }
        let stream_distr = get_stream_weights(fuzzer, input_id, &streams);

        Some(Self {
            comparisons,
            finder: ReplacementFinder::new(fuzzer.features.strided_int_matches),
            streams,
            stream_distr,
        })
    }

    pub fn random_replace(&mut self, fuzzer: &mut Fuzzer) -> Option<()> {
        const MAX_REPLACEMENT_ATTEMPTS: usize = 100;