aarch64-linux-gnu-gcov-tool man page

gcov-tool — offline gcda profile processing tool

Synopsis

gcov-tool [-v|--version] [-h|--help]

gcov-tool merge [merge-options] directory1 directory2
    [-v|--verbose]
    [-o| --output directory]
    [-w|--weight w1,w2]

gcov-tool rewrite [rewrite-options] directory
    [-v|--verbose]
    [-o|--output directory]
    [-s|--scale float_or_simple-frac_value]
    [-n|--normalize long_long_value]

gcov-tool overlap [overlap-options] directory1 directory2
    [-v|--verbose]
    [-h|--hotonly]
    [-f|--function]
    [-F|--fullname]
    [-o|--object]
    [-t|--hot_threshold] float

Description

gcov-tool is an offline tool to process gcc's gcda profile files.

Current gcov-tool supports the following functionalities:

Examples of the use cases for this tool are:

Note that for the merging operation, this profile generated offline may contain slight different values from the online merged profile. Here are a list of typical differences:

Options

-h
--help

Display help about using gcov-tool (on the standard output), and exit without doing any further processing.

-v
--version

Display the gcov-tool version number (on the standard output), and exit without doing any further processing.

merge

Merge two profile directories.

-v
--verbose

Set the verbose mode.

-o directory
--output directory

Set the output profile directory. Default output directory name is merged_profile.

-w w1,w2
--weight w1,w2

Set the merge weights of the directory1 and directory2, respectively. The default weights are 1 for both.

rewrite

Read the specified profile directory and rewrite to a new directory.

-v
--verbose

Set the verbose mode.

-o directory
--output directory

Set the output profile directory. Default output name is rewrite_profile.

-s float_or_simple-frac_value
--scale float_or_simple-frac_value

Scale the profile counters. The specified value can be in floating point value, or simple fraction value form, such 1, 2, 2/3, and 5/3.

-n long_long_value
--normalize <long_long_value>

Normalize the profile. The specified value is the max counter value in the new profile.

overlap

Compute the overlap score between the two specified profile directories. The overlap score is computed based on the arc profiles. It is defined as the sum of min (p1_counter[i] / p1_sum_all, p2_counter[i] / p2_sum_all), for all arc counter i, where p1_counter[i] and p2_counter[i] are two matched counters and p1_sum_all and p2_sum_all are the sum of counter values in profile 1 and profile 2, respectively.

-v
--verbose

Set the verbose mode.

-h
--hotonly

Only print info for hot objects/functions.

-f
--function

Print function level overlap score.

-F
--fullname

Print full gcda filename.

-o
--object

Print object level overlap score.

-t float
--hot_threshold <float>

Set the threshold for hot counter value.

See Also

gpl(7), gfdl(7), fsf-funding(7), gcc(1), gcov(1) and the Info entry for gcc.

Info

2017-06-22 gcc-7 GNU