Support outputting branch coverage information in LCOV format about grcov HOT 6 CLOSED

should the block number be 0 as in coveralls?

Yes.

branch hit count is the number of times the taken value is non zero?

Yes, if by "branch hit count" you mean the "BRH" value.

from grcov.

From http://ltp.sourceforge.net/coverage/lcov/geninfo.1.php:

Branch coverage information is stored which one line per branch:

  BRDA:<line number>,<block number>,<branch number>,<taken>

Block number and branch number are gcc internal  IDs  for  the  branch.
Taken  is either '-' if the basic block containing the branch was never
executed or a number indicating how often that branch was taken.

Branch coverage summaries are stored in two lines:

  BRF:<number of branches found>
  BRH:<number of branches hit>

from grcov.

Dear @marco-c ,
I would like to work on the issue. I understand the issue and have gone through the resources mentioned. In README it is mentioned that we can output the code coverage information in lcov. Please, can you guide me through the necessary things to be done.

Thank you,
Sushma

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Hello @Sush0512. The output_lcov function in src/output.rs needs to be modified to support outputting branch information too (the format is described in my earlier comment).

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output_coveralls for example is outputting the branch information for the coveralls format.

from grcov.

Thank you for the information. I started working on the issue and want to clarify the following.

• should the block number be 0 as in coveralls?
• branch hit count is the number of times the taken value is non zero?

from grcov.