I am primarily a C and C++ programmer and i often need to quickly comprehend the structure of very large code bases (gcc, linux kernel). I wonder if there are any tools to help in this regard. I am particularly interested in call graphs, data structure references across the project, include dependency graphs, quick symbol location, etc. I known about ctags and cscope but i am looking for something with more visualization like a call graph that allows to quickly locate definition of a function, root the graph at a particular call, inverting it (i.e. locating all calls to a given function), etc.
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