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General Working PrinciplesTestwell CTC++ measures Code Coverage for desktop / host applications and for embedded software. It works in three fundamental steps: instrumenting, testing and reporting.
Code Coverage Measures Code coverage is a measure on how thoroughly the program code has been exercised during test. The different coverage levels Testwell CTC++ provides are described here.
Function Coverage Function coverage measures if functions are called during test.

Function Coverage

Function coverage measures if functions are called during test.

In the following example, full function coverage (2 / 2) is achieved as both functions, foo and main, have been called:

The function’s internal program flow is irrelevant for function coverage, hence it is a rather weak measure. As instrumentation mode, it is the most lightweight coverage measure.

Note: Function coverage is available as instrumentation mode with ctc option -i f. It is reported

with ctcreport: option -measures ...,f,...,
with ctcpost: option -ff.