Feature Requests item #3553772, was opened at 2012-08-02 14:01
Message generated for change (Tracker Item Submitted) made by robld
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Category: Tools
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Robert Luberda (robld)
Assigned to: Nobody/Anonymous (nobody)
Summary: lcov: source files matching during *.info files creation
Initial Comment:
Hi
geninfo iterates in the following loop over all files generated by gcov:
foreach $gcov_file (sort(@gcov_list))
{
my $i;
my $num;
($source, $object) = read_gcov_header($gcov_file);
if (defined($source))
{
$source = solve_relative_path($base_dir, $source);
It would be nice if geninfo would have an option to ignore $source that does
not match certain file name pattern, i.e. if the next line would be something
like
next unless matches_requested_filename_patterns($source)
This obvoiusly work similar quite to --extract option of lcov, but I belive it
would result in a big performance improvement, as gcov tends to generate lots
of useless (from our point of view) files containg coverage data for system or
external library headers. Then geninfo reads all the files, and wastes time and
processor cycles to generate huge info file, most of which will be removed by
lcov --extract. For a big C++ project the whole process of generating unit test
coverage data takes several hours. I hope using the proposed approach will
reduce the time significantly.
The simillar thing can be done for reading gcno files for gathering initial
coverage data.
I can try to create a patch, if you are interested in.
Thanks a lot,
robert
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