Function parse_perf_script

src/commands/hot_blocks.rs:514–524

Parse `perf script -F ip,sym,symoff,dso` output to extract samples that come from a perf map (i.e. compiled WebAssembly code and trampolines).

(output: &str)

/// Parse `perf script -F ip,sym,symoff,dso` output to extract samples that
/// come from a perf map (i.e. compiled WebAssembly code and trampolines).
fn parse_perf_script(output: &str) -> (Vec<PerfSample>, usize) {
    let mut samples = Vec::new();
    let mut total_samples = 0;
    for line in output.lines() {
        total_samples += 1;
        if let Some(sample) = parse_perf_script_line(line.trim()) {
            samples.push(sample);
        }
    }
    (samples, total_samples)
}

fn parse_perf_script_line(line: &str) -> Option<PerfSample> {
    // perf script -F ip,sym,symoff,dso gives lines like: