Abstract: In recent years,many safety-critical software system have been running under domestic Linux operating systems,most of which are developed with C++.As C++ is expanding to new revision of the C++ ISO/IEC stan-dards,the existing source code instrumentation tools for coverage analysis cannot satisfy user’s requirements.In this paper,an approach to C++ source code instrumentation for coverage analysis with Clang/LLVM was proposed.Employing the Clang/LLVM library in open source community,which provides C++ source code parsing and manipulation functions,a framework of C++ coverage analysis for statement coverage,branch coverage and MC/DC coverage was constructed.Coverage information was collected in real-time,and was analyzed and exported to reports.Case study shows that the proposed approach is very convenient and practical in real world software testing activities.

Key words: C++,Clang,Code instrumentation,Coverage analysis