Class MultiStreamExtendStage

hail-fuzz/src/extension.rs:15–50

};

pub(crate) struct MultiStreamExtendStage {
    /// The different addresses that the program has finished executing at, used for discovering
    /// new inputs for further mutations.
    end_addrs: HashSet<u64>,

    /// The rarest ending address seen for the current input.
    rare_input: Option<(u64, MultiStream)>,

    /// Inputs that we found that end with new mmio address.
    new_starting_inputs: VecDeque<(u32, MultiStream)>,

    /// The input we are extending.
    current_input: MultiStream,

    /// The number of inputs that we fuzzed in order to reach `current_input`.
    local_depth: u32,

    /// The maximum number of extensions to apply per stream.
    log2_max_extensions: u32,

    /// The set of streams that have been observed to be read after `current_input`
    streams_to_mutate: HashMap<StreamKey, f64>,

    /// Data used for input-to-state random replacement.
    i2s_data: Option<i2s::I2SRandomReplacement>,

    /// The number of remaining attempts when to try i2s random replacement for.
    i2s_replacement_attempts: i32,

    /// The amount of energy assigned to this input.
    energy: usize,

    /// The remaining attempts to try for the current input.
    attempts: usize,
    extension_limit: usize,
}

impl MultiStreamExtendStage {
    fn start(fuzzer: &mut Fuzzer) -> Result<Self, StageExit> {