CODEWITHSUNDEEP
ctestingbranchcode-coveragelcov
user1823629
user1823629

Reputation: 261

Lcov: can not collect branch coverage statistics

I used the lcov to create coverage information in my project. But I only can get line coverage and function coverage statistics information. 

lcov version:1.10, gcov version:4.4.5

The commands I used is:

 lcov -d $OSPL_HOME/src -d $OSPL_OUTER_HOME/src  -c -o /work/li/log/lcov-raw.info

lcov -r /work/li/log/lcov-raw.info "*.ll" "*.yy" "*.yy.c" yaccpar "TAO161*" "/usr/include/*"  "*/testsuite/*" -o /work/li/log/lcov.info

After these two commands, I got the results is: 

Deleted 23 files

Writing data to /work/li/log/lcov.info

Summary coverage rate:

  lines......: 45.4% (65087 of 143496 lines)

   functions..: 46.1% (5575 of 12102 functions)

  **branches...: no data found**

So there were no branches coverage results. Why? So what happened? And how can this happen? I am confused here.

After the first command, I got lots of warnings like these:

geninfo: WARNING: cannot find an entry for ..#..#code#accum.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#at.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#autodef.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#copyof.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#debug.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#define.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#dump.c.gcov in .gcno file,skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#error.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#expand.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#expr.c.gcov in .gcno file,skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#if.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#include.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#io.c.gcov in .gcno file, s kipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#is.c.gcov in .gcno file, s kipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#line.c.gcov in .gcno file,skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#pragma.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#preprocess.c.gcov in .gcnofile, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#set.c.gcov in .gcno file,skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#sharp.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#symtbl.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#undef.c.gcov in .gcno file, skipping file!
 geninfo: WARNING: cannot find an entry for ..#..#code#while.c.gcov in .gcno file , skipping file!

Upvotes: 26

Views: 12488

Answers (2)

Fabrice LARRIBE
Fabrice LARRIBE

Reputation: 332

the solution given above :

--rc lcov_branch_coverage=1

used both for lcov and genhtml, worked for me.

Upvotes: 13

Duncan Jones
Duncan Jones

Reputation: 69329

I got the email from Peter Oberparleiter, the author of geninfo. I got the answer as following.

LCOV 1.10 has branch coverage disabled per default. You can enable it by modifying the lcovrc file (see man lcovrc) or by specifying --rc lcov_branch_coverage=1 when running lcov/genhtml.

If you're not using LCOV 1.10 and still don't get branch coverage, it may be that you're version of GCC does not provide this information.

(The above answer was erroneously added to the question by the author.)

Upvotes: 35

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