What is gcov code coverage?

DESCRIPTION. gcov is a test coverage program. Use it in concert with GCC to analyze your programs to help create more efficient, faster running code and to discover untested parts of your program. You can use gcov as a profiling tool to help discover where your optimization efforts will best affect your code.

What is LCOV code coverage?

LCOV is a graphical tool for GCC’s coverage testing with gcov. It creates HTML pages containing the source code annotated with coverage information by collecting gcov data from multiple source files. LCOV supports “Lines coverage” and “Functions coverage” measurement.

What is the output of gcov?

One . gcov file is produced for each source (or header) file containing code, which was compiled to produce the data files. The mangledname part of the output file name is usually simply the source file name, but can be something more complicated if the ‘ -l ‘ or ‘ -p ‘ options are given.

What is gcov in GCC?

gcov is a test coverage program. Use it in concert with GCC to analyze your programs to help create more efficient, faster running code and to discover untested parts of your program. You can use gcov as a profiling tool to help discover where your optimization efforts will best affect your code.

How do you use gcov?

To use Gcov, perform the following steps:

  1. Compile the code with the -fprofile-arcs and -ftest-coverage flags, for example: $ gcc -fprofile-arcs -ftest-coverage test.c.
  2. Run the instrumented binary and perform functional testing.
  3. Generate a report file based on the data that is stored in the profile output files:

What is Genhtml?

Description. Create an HTML view of coverage data found in tracefile. Note that tracefile may also be a list of filenames. HTML output files are created in the current working directory unless the –output-directory option is used.

What is GCNO and Gcda files?

gcno file is generated when the source file is compiled with the GCC -ftest-coverage option. It contains information to reconstruct the basic block graphs and assign source line numbers to blocks. The . gcda file is generated when a program containing object files built with the GCC -fprofile-arcs option is executed.

How do I create a LCOV report?

Pre-requisites

  1. Set up build environment.
  2. Install lcov.
  3. patch ‘geninfo’
  4. Create lcovrc file.
  5. Create a storage directory.
  6. Retrieve software version.
  7. Create reports.

How install LCOV Linux?

Pre-requisites

  1. Set up build environment. Follow the guidelines at : How to Build to set up your LibreOffice build environment.
  2. Install lcov. You need to use lcov 1.10 or higher.
  3. patch ‘geninfo’
  4. Create lcovrc file.
  5. Create a storage directory.
  6. Retrieve software version.
  7. Create reports.

How do I open a gcov file?