Zeitschriftenartikel: Advanced chopping of sequential and concurrent programs

A chop for a source statement s and a target statement t reveals the program parts involved in conveying effects from s to t. While precise chopping algorithms for sequential programs are known, no chopping algorithm for concurrent programs has been reported at all. This work introduces six chopping algorithms for concurrent programs, which offer different degrees of precision, ranging from imprecise over context-sensitive to time-sensitive. Our evaluation on concurrent Java programs shows that context-sensitive and time-sensitive chopping reduces chop sizes significantly. We further present an extensive evaluation of chopping algorithms for sequential programs and describe a new, easy to implement chopping technique for sequential programs that computes fast and almost context-sensitive chops.