Function num_bytes_mapped

examples/mpk.rs:230–256

()

/// We parse the start and end addresses: <start>-<end> [ignore the rest].
#[cfg(target_os = "linux")]
fn num_bytes_mapped() -> Result<usize> {
    use std::fs::File;
    use std::io::{BufRead, BufReader};

    let file = File::open("/proc/self/maps")?;
    let reader = BufReader::new(file);
    let mut total = 0;
    for line in reader.lines() {
        let line = line?;
        let range = line
            .split_whitespace()
            .next()
            .ok_or(format_err!("parse failure: expected whitespace"))?;
        let mut addresses = range.split("-");
        let start = addresses.next().ok_or(format_err!(
            "parse failure: expected dash-separated address"
        ))?;
        let start = usize::from_str_radix(start, 16)?;
        let end = addresses.next().ok_or(format_err!(
            "parse failure: expected dash-separated address"
        ))?;
        let end = usize::from_str_radix(end, 16)?;

        total += end - start;
    }
    Ok(total)
}

#[cfg(not(target_os = "linux"))]
fn num_bytes_mapped() -> Result<usize> {