find-leak.rs

use std::io::{BufRead, BufReader};

fn extract_preloader(line: &str) -> u64 {
    let hex = line.split("(").nth(1).unwrap().split(",").next().unwrap();
    let hex = hex.trim_start_matches("0x");
    u64::from_str_radix(hex, 16).unwrap()
}


fn main() {
    let file = std::fs::File::open("/home/emilio/src/moz/gecko/log-unmarked").unwrap();
    let mut map = std::collections::HashMap::<u64, Vec<String>>::new();
    for line in BufReader::new(file).lines() {
        let line = line.unwrap();
        if line.starts_with("PreloaderBase::~PreloaderBase") {
            map.remove(&extract_preloader(&line));
        }
        if line.starts_with("PreloaderBase::NotifyOpen") {
            let preloader = extract_preloader(&line);
            map.entry(preloader).or_default().push(line);
        }
    }

    for (_, values) in map {
        for value in values {
            println!("{}", value);
        }
    }
}