Lcov：无法收集分支覆盖率统计数据

Question

我使用

lcov

在我的项目中创建覆盖范围信息。但我只能得到线路覆盖率和功能覆盖率统计信息。

lcov version:1.10, gcov version:4.4.5

我使用的命令是：

 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

执行这两个命令后，我得到的结果是：

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**

因此没有分支覆盖结果。为什么？所以发生了什么事？这怎么可能发生？我在这里很困惑。

在第一个命令之后，我收到了很多这样的警告：

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!

Answer 1

我收到了 geninfo 的作者 Peter Oberparleiter 发来的电子邮件。我得到的答案如下。

LCOV 1.10 默认禁用分支覆盖。您可以通过修改 lcovrc 文件（请参阅

man lcovrc

）或在运行

--rc lcov_branch_coverage=1

时指定

lcov/genhtml

来启用它。

如果您没有使用 LCOV 1.10 并且仍然没有获得分支覆盖率，则可能是您的 GCC 版本不提供此信息。

(以上答案被作者错误添加到问题中。)

Answer 2

上面给出的解决方案：

--rc lcov_branch_coverage=1

同时用于 lcov 和 genhtml，对我有用。