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Integrate RKTracer with C# projects with dotnet build and generate code coverage

The application should be built and testable

You should be able to build and test the application using the dotnet build command in the command line mode. To generate code coverage for the dotnet based application, you need to prefix rktracer to dotnet build command.

dotnet build prime.csproj


 rktracer dotnet build prime.csproj

RKTracer tool makes internal adjustments to dotnet build to instrument all the source files compiled. By default, rktracer instruments for multiple-condition code coverage, and you see the following code coverage information in the HTML report.

  • Function Coverage
  • Line Coverage 
  • Statement Coverage
  • Multi-Condition Code Coverage

Example dotnet build:

Step 1: Enable RKTracer Tool

Before you enable the RKTracer tool for instrumentation, you need to clean the project, as the RKTracer tool will instrument the project at the source code level.

dotnet build prime.csproj


rktracer dotnet build prime.csproj

  • RKTracer instruments C# source file with “c:\rktracer/lib/librkliz-x86_64-w64-mingw32.exe ” and writes out the instrumented file to the “prime.cs” file in a preprocessed directory. Also, it stores the metadata, structure of instrumentation, and copy of source file content in JSON file. The tool will refer rktracer.config for internal configuration at the time of instrumentation.
  • RKTracer automatically adds runtime library to dotnet build.

Step 2: Test instrumented application. 

You can do unit testing/functional testing. In this case, it’s functional testing.

Post-testing the RKTracer tool will save coverage data to the rk-coverage.txt file. In case if your testing instrumented application in a server machine you need to copy the rk-coverage.txt file from the server to the application working folder to build the machine.


Step 3: Generate Code Coverage HTML reports.

Once you have the rk-coverage.txt file, you need to run the command “rkresults” to generate HTML reports. Ensure that you run the “rkresults” command in the project root folder or where we have the “rktracer” folder.


rkresults command will search coverage data file “rk-coverage.txt” and map with JSON files (generated during instrumentation) in the rktracer folder and generate html reports. You can manually open the HTML report using index.html.

Generate code coverage for selected functions/files/folder

Generate coverage reports  for the selected folders






Suppose you need code coverage for source files from three different folders, i.e., core, keys, power, and ignore coverage for folders firmware_loader and lockdown. Edit rktracer.config in the RKTracer installation folder and go to the end of the file add the following information. 

ignore *.cs

instrument */power/* */core/* */keys/*

never */firmware_loader/* */lockdown/*

ignore *.cs = Ignores all C# source files from instrumentation

Instrument = Instrument source files from given folders

never = ignore selected folder  

Generate coverage reports only for selected functions from three different files.

fun_X() in source-file-X 

fun_Y() in source-file-Y

fun_Z() in source-file-Z

Suppose you need code coverage for selected functions from three different files. Edit rktracer.config in the RKTracer installation folder and go to the end of the file and set the following variables as shown below.  

ignore *.cs

instrument *source-file-X.cs *source-file-Y.cs *source-file-Z.cs

function-ignore *

function-instrument fun_X() fun_Y() fun_Z()

ignore *.cs = Ignore all C# programming source files

instrument *file-X.cs *file-Y.cs *file-Z.cs   = Instrument only these three source files.

function-ignore * = Then ignore all functions in the above three files.

function-instrument fun_X() fun_Y() fun_Z() = Don’t ignore these three functions from these three files from instrumentation.

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