elf_symbolizer.py 文件源码

def _ProcessSymbolOutput(self, lines):
      """Parses an addr2line symbol output and triggers the client callback."""
      (_, callback_arg, _) = self._request_queue.popleft()
      self.queue_size -= 1

      innermost_sym_info = None
      sym_info = None
      for (line1, line2) in lines:
        prev_sym_info = sym_info
        name = line1 if not line1.startswith('?') else None
        source_path = None
        source_line = None
        m = ELFSymbolizer.Addr2Line.SYM_ADDR_RE.match(line2)
        if m:
          if not m.group(1).startswith('?'):
            source_path = m.group(1)
            if not m.group(2).startswith('?'):
              source_line = int(m.group(2))
        else:
          logging.warning('Got invalid symbol path from addr2line: %s', line2)

        # In case disambiguation is on, and needed
        was_ambiguous = False
        disambiguated = False
        if self._symbolizer.disambiguate:
          if source_path and not posixpath.isabs(source_path):
            path = self._symbolizer.disambiguation_table.get(source_path)
            was_ambiguous = True
            disambiguated = path is not None
            source_path = path if disambiguated else source_path

          # Use absolute paths (so that paths are consistent, as disambiguation
          # uses absolute paths)
          if source_path and not was_ambiguous:
            source_path = os.path.abspath(source_path)

        if source_path and self._symbolizer.strip_base_path:
          # Strip the base path
          source_path = re.sub('^' + self._symbolizer.strip_base_path,
              self._symbolizer.source_root_path or '', source_path)

        sym_info = ELFSymbolInfo(name, source_path, source_line, was_ambiguous,
                                 disambiguated)
        if prev_sym_info:
          prev_sym_info.inlined_by = sym_info
        if not innermost_sym_info:
          innermost_sym_info = sym_info

      self._processed_symbols_count += 1
      self._symbolizer.callback(innermost_sym_info, callback_arg)