11.2 Invoking gcov-tool

     gcov-tool [
      global-options
      ]
 SUB_COMMAND [
      sub_command-options
      ]
 profile_dir

gcov-tool accepts the following 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
Computer 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.