Using gcov and lcov
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This document discusses how to use gcov and lcov to generate code coverage reports from C/C++ code. It explains that gcov collects coverage data during program execution, while lcov generates HTML reports from this data and source code files. The document then provides steps for compiling code with coverage collection enabled, running the code to generate coverage data files, and using lcov to produce an HTML report annotating the source with coverage information. An example is included, and the document closes with a Q&A section and thanks.
Using gcov and lcov
- 1. Using gcov and lcovMagus [email protected]://magustest.com/blog/
- 2. AgendagcovlcovHow to apply gcov on adsUsing lcov generate reportExample2
- 3. Introduction to gcovA test coverage programWorks only on code compiled with GCCCollect code coverage data and generate plain text coverage report3
- 4. Introduction to lcovLCOV is a graphical front-end for GCC's coverage testing tool gcov. It collects gcov data for multiple source files and creates HTML pages containing the source code annotated with coverage information. It also adds overview pages for easy navigation within the file structure. LCOV supports statement, function and branch coverage measurement.4
- 5. How to apply gcov on adsBuild adserver with option “--coverage”This option is used to compile and link code instrumented for coverage analysis. The option is a synonym for -fprofile-arcs-ftest-coverage (when compiling) and -lgcov (when linking).5
- 6. How to apply gcov on adsCopy ads binary to your own environment Export two envGCOV_PREFIX and GCOV_PREFIX_STRIP Run adsSend requestTo generate code coverage data, exit the program normally (using kill, not kill -9)Some .gcda file is generated6
- 7. How to generate html reportCopy all source files and .gcno files from build server to your own environmentCopy all .gcda file to your own environmentlcov -t 'Adserver regression' -o ads_test.info -c -d .-t title-o output file name-c capture coverage data-d use data files in DIR7
- 8. How to generate html reportgenhtml -o result ads_test.info -o output folder of the all html contentsads_test.info INFO FILE name8
- 9. How to view the HTML reportApache httpd/etc/init.d/httpd startCopy or link the result folder under /var/www/html/Lighttpd/usr/local/sbin/lighttpd -f lighttpd_jchen.confCopy or link the result folder under server.document-root9
- 10. Example10
- 11. Q & A11
- 12. Thank you