Function parseThreadSample

profile/legacy_profile.go:925–955

parseThreadSample parses a symbolized or unsymbolized stack trace. Returns the first line after the traceback, the sample (or nil if it hits a 'same-as-previous' marker) and an error.

(s *bufio.Scanner)

// Returns the first line after the traceback, the sample (or nil if
// it hits a 'same-as-previous' marker) and an error.
func parseThreadSample(s *bufio.Scanner) (nextl string, addrs []uint64, err error) {
	var line string
	sameAsPrevious := false
	for s.Scan() {
		line = strings.TrimSpace(s.Text())
		if line == "" {
			continue
		}

		if strings.HasPrefix(line, "---") {
			break
		}
		if strings.Contains(line, "same as previous thread") {
			sameAsPrevious = true
			continue
		}

		curAddrs, err := parseHexAddresses(line)
		if err != nil {
			return "", nil, fmt.Errorf("malformed sample: %s: %v", line, err)
		}
		addrs = append(addrs, curAddrs...)
	}
	if err := s.Err(); err != nil {
		return "", nil, err
	}
	if sameAsPrevious {
		return line, nil, nil
	}
	return line, addrs, nil
}

// parseAdditionalSections parses any additional sections in the
// profile, ignoring any unrecognized sections.