[Bug translator/18673] New: .statement line-number-range slow for large ranges

fche at redhat dot com sourceware-bugzilla@sourceware.org
Tue Jul 14 18:54:00 GMT 2015


https://sourceware.org/bugzilla/show_bug.cgi?id=18673

            Bug ID: 18673
           Summary: .statement line-number-range slow for large ranges
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
          Assignee: systemtap at sourceware dot org
          Reporter: fche at redhat dot com
  Target Milestone: ---

We have at least two problems:

- that something like probe FOO.statement("*@*:1-99999999")  
  creates a very large linenos[] vector in dwarf_query::parse_function_spec

- and then in dwflpp::iterate_over_srcfile_lines, we iterate over each element
(line number) in collect_lines_for_single_lineno, repeating a large amount of
computation

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