DDFgraph: a tool for dynamic data flow graphs visualization

DDFgraph allows extraction and visualization of dynamic data-flow graphs computed at runtime. It currently relies on a Lisp interpreter modified to monitor data use (both of global and local variables) during program execution and to detect the corresponding data flow, namely the value of variables ´flowing´ from one point of the program to another. A companion database stores this flow and produces, on demand, its representation as a graph for dot. Furthermore, the flow graph can be manipulated, in order to reduce the size of the graph, through extraction of some parts of particular interest and/or through compaction of given subparts leaving visible only global flow.