However, I found the way to get this to work. I have presented the steps that work with the sample project below. The steps work for Linux/Mac. Similar steps would work even on Windows once you have installed lcov. On Mac, you can install lcov using Mac Ports. Go to the Debug folder of the sample project. App description: Graphical front-end for GCC's coverage testing tool (gcov). Mac, iMac, Macbook, OSX, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard.
This is about how to run your C/C++ code using gcov to gather coverage metrics.
Note
These instructions have been tested on Mac OS X 10.9 (Mavericks).They may or may not work on other OS's
gcov under Mac OS X¶
Configuring Xcode¶
This document tells you how to configure Xcode for gcov (actually llvm-cov).
Running and Analysing Code Coverage¶
In Xcode select Product->Run then once that has completed note the GCov_build directory in Xcode by selecting Products-> in the left hand pane. In the right hand pane under ‘Identity and Type' you should see ‘Full Path' of something like:
However, I found the way to get this to work. I have presented the steps that work with the sample project below. The steps work for Linux/Mac. Similar steps would work even on Windows once you have installed lcov. On Mac, you can install lcov using Mac Ports. Go to the Debug folder of the sample project. App description: Graphical front-end for GCC's coverage testing tool (gcov). Mac, iMac, Macbook, OSX, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard.
This is about how to run your C/C++ code using gcov to gather coverage metrics.
Note
These instructions have been tested on Mac OS X 10.9 (Mavericks).They may or may not work on other OS's
gcov under Mac OS X¶
Configuring Xcode¶
This document tells you how to configure Xcode for gcov (actually llvm-cov).
Running and Analysing Code Coverage¶
In Xcode select Product->Run then once that has completed note the GCov_build directory in Xcode by selecting Products-> in the left hand pane. In the right hand pane under ‘Identity and Type' you should see ‘Full Path' of something like:
Traktor pro 2 trial. In the Terminal navigate to the ‘Build' directory:
Now navigate to the Intermediates/ directory and in there you should find the code coverage data in a path such as this:
In there the interesting file has a .gcno extension. To convert this into something readable we need to run gcov on it. We can use xcrun to find gcov and this gives an overall code coverage number for each file (and its includes):
This has now generated a detailed file TimeBDT.cpp.gcov that contains line by line coverage:
The first snippet shows that line 210 is executed 6000000 times. In the second snippet the ##### shows that lines 290-293 have not executed at all.
Using gcov on CPython Extensions¶
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Whilst it is common to track code coverage in Python test code it gets a bit more tricky with Cpython extensions as Python code coverage tools can not track C/C++ extension code. The solution is to use gcov and run the tests in a C/C++ process by embedding the Python interpreter.
Dying light crack. Next: Cross-profiling, Previous: Gcov and Optimization, Up: Gcov [Contents][Index]
10.4 Brief Description of gcov Data Files
gcov uses two files for profiling. The names of these filesare derived from the original object file by substituting thefile suffix with either .gcno, or .gcda. The filescontain coverage and profile data stored in a platform-independent format.The .gcno files are placed in the same directory as the objectfile. By default, the .gcda files are also stored in the samedirectory as the object file, but the GCC -fprofile-dir optionmay be used to store the .gcda files in a separate directory.
The .gcno notes file is generated when the source file is compiledwith the GCC -ftest-coverage option. It contains information toreconstruct the basic block graphs and assign source line numbers toblocks.
Gcov For Macbook Pro
The .gcda count data file is generated when a program containingobject files built with the GCC -fprofile-arcs option is executed.A separate .gcda file is created for each object file compiled withthis option. It contains arc transition counts, value profile counts, andsome summary information.
Gcov Macros
It is not recommended to access the coverage files directly.Consumers should use the intermediate format that is providedby gcov tool via --json-format option.
