Awesome Code Coverage

A curated list of code coverage resources. Only free tools are included.

What is code coverage?

Code coverage is the process of measuring the percentage of the source code lines that are executed during testing.

Commonly, code coverage tools are implemented by these ways.

• Instrumentation at compile time, insert addtional codes to collect code coverage.
• Act as a debugger, insert break points at runtime, collect code coverage.
• Use existing instrumetation/debug interface provided by the language, collect code coverage (e.g., Lua, Python).

Contents

• Tools
• Documentations
• Papers
• Blogs

Tools

C & C++

Tools	Supported OS	Implementation	Branch Coverage
gcov	All OS supported by gcc	Instrumentation	YES
kcov	FreeBSD/Linux/MacOS	Debugger	NO
OpenCppCoverage	Windows	Debugger	NO

Go

Tools	Supported OS	Implementation	Branch Coverage
go cover	All OS supported by Go	Instrumentation	NO
goc	All OS supported by Go	Instrumentation	NO
gobco	All OS supported by Go	Instrumentation	YES
kcov	FreeBSD/Linux/MacOS	Debugger	NO

Java

Tools	Supported OS	Implementation	Branch Coverage
JaCoCo	All OS supported by JVM	Instrumentation (at runtime by java agent)	YES
cobertura	All OS supported by JVM	Instrumentation	YES

Smali

Tools	Supported OS	Implementation	Branch Coverage
acvtool	Android	Instrumentation	NO

Lua

Tools	Supported OS	Implementation	Branch Coverage
luacov	All OS supported by Lua	Debug Interface (debug module)	Partial

Documentations

• LLVM - Source-based Code Coverage

Papers

• Smali - Fine-grained code coverage measurement in automated black-box Android testing

Blogs

• Go - Coverage profiling support for integration tests
• What is Wrong with Statement Coverage