Code coverage plays an important role as criterion for the decision to stop testing the code.
Code coverage criteria are condition coverage, decision coverage, and modified condition/decision coverage.
To measure code coverage, the source code has to be instrumented.
Code coverage measurement in TPT is indirectly possible by means of other tools like CTC++ and Gcov.
For Simulink models you can use the Verification and Validation Toolbox (V&V-Toolbox) or TargetLink.
The results of the code coverage analysis can be integrated in the TPT report.