gcov - lcov 无法正常覆盖

Question

我正在尝试使用 gcc 4.8.2 和 lcov 1.10 获取 html 覆盖率以进行测试。我确定我的源文件、对象和 gcov 文件位于同一位置，并且我正在从我运行编译器的目录中运行 lcov。

我收到以下错误:

$ lcov --capture --directory "objs/i386/MinGW/Os_SingleCore_SC3
/IocTest_tests_SingleCore_SC3" --output-file coverage.info
Capturing coverage data from objs/i386/MinGW/Os_SingleCore_SC3/IocTest_tests_SingleCore_SC3
Found gcov version: 4.8.2
Scanning objs/i386/MinGW/Os_SingleCore_SC3/IocTest_tests_SingleCore_SC3 for .gcda files ...
Found 3 data files in objs/i386/MinGW/Os_SingleCore_SC3/IocTest_tests_SingleCore_SC3
Processing IocTest_tests_SingleCore_SC3/IocTest.gcda
geninfo: WARNING: cannot find an entry for objs#i386#MinGW#Os_SingleCore_SC3#IocTest_tests_SingleCore_SC3#IocTest.c.gcov in .gcno file, skipping file!
geninfo: WARNING: no data found for /cygdrive/e/testRepo/WinPort-Os-cd354a27d1d9/WinPort/Os/Tests/OS_REQ/objs\i386\MinGW\Os_SingleCore_SC3\IocTest_tests_SingleCore_SC3\IocTest.c
Processing IocTest_tests_SingleCore_SC3/OS_REQ.gcda
geninfo: WARNING: cannot find an entry for objs#i386#MinGW#Os_SingleCore_SC3#IocTest_tests_SingleCore_SC3#OS_REQ.c.gcov in .gcno file, skipping file!
geninfo: WARNING: no data found for /cygdrive/e/testRepo/WinPort-Os-cd354a27d1d9/WinPort/Os/Tests/OS_REQ/objs\i386\MinGW\Os_SingleCore_SC3\IocTest_tests_SingleCore_SC3\OS_REQ.c
Processing IocTest_tests_SingleCore_SC3/TestMain.gcda
geninfo: WARNING: cannot find an entry for objs#i386#MinGW#Os_SingleCore_SC3#IocTest_tests_SingleCore_SC3#TestMain.c.gcov in .gcno file, skipping file!
geninfo: WARNING: no data found for /cygdrive/e/testRepo/WinPort-Os-cd354a27d1d9/WinPort/Os/Tests/OS_REQ/objs\i386\MinGW\Os_SingleCore_SC3\IocTest_tests_SingleCore_SC3\TestMain.c
Finished .info-file creation

Answer 1

首先，我建议检查 gcov 是否返回正确的覆盖率数据。意味着需要运行 gcov 工具并检查 *.gcov 文件以获得实际结果。如果它返回任何覆盖范围。

其次你可以使用--base-directory，例如

$ lcov --base-directory .  --directory . -c -o gcov/lcov.info