Trucov is an open source code coverage analysis tool for GCC versions 4.0 and later[1] that aims to be a gcov replacement.
Trucov improves upon gcov by providing more granular and machine readable output, such as DOT Files representing control-flow graph of the program.
The use of DOT Files allows for other common tools like GraphViz to be used to produce coverage graphs.
Trucov was developed as a senior design project[2] at Washington State University.