LCOV 如何過濾iostream等系統函數的覆蓋率資訊

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最近在做cppunit test相關工作，用gcov和lcov工具來查看每行代碼的覆蓋率，個人感覺lcov真棒，看起來很舒服，點起來也很爽！~~

閑聊至此，如題：

我使用的是lcov的 --remove命令

Remove / filter out remaining unwanted stuff from tracefile

Now we can remove the (remaining) stuff that we aren‘t interested in from the tracefile.

lcov --remove /tmp/libreoffice_total.info ‘/usr/include/*‘ ‘/usr/lib/*‘ ‘/usr/local/src/libreoffice/*/UnpackedTarball/*‘ ‘/usr/local/src/libreoffice/workdir/*‘ ‘/usr/local/src/libreoffice/instdir/*‘ ‘/usr/local/src/libreoffice/external/*‘ -o /tmp/libreoffice_filtered.info

/usr/include/*和/usr/lib/*這兩個路徑加上就可以過濾掉那些系統函數的覆蓋資訊了（iostream等），如果想過濾其他路徑，那就自己加吧！~~

 

PS: 手冊中說--extract命令貌似也可以，不過我沒試。

 -e tracefile pattern       --extract tracefile pattern              Extract data from tracefile.              Use this switch if you want to extract coverage data for only  a              particular  set  of  files  from a tracefile. Additional command              line parameters will be interpreted as shell  wildcard  patterns              (note  that  they  may need to be escaped accordingly to prevent              the shell from expanding  them  first).   Every  file  entry  in              tracefile  which  matches at least one of those patterns will be              extracted.

 

參考連結：https://wiki.documentfoundation.org/Development/Lcov#patch_.27geninfo.27

lcov manual：http://ltp.sourceforge.net/coverage/lcov/lcov.1.php