How to work with graphiz along retdec?

[MBilalQureshi]

I have installed retdec, what i want the graphical representation of code that is decompiled in C, how can i do this using graphiz as i am new to this work, can someone kindly explain.

[s3rvac]

Hi. First of all, you have to install Graphviz. Then, run decompilations with parameters --backend-emit-cfg and --backend-emit-cg, e.g.

python retdec-decompiler.py --backend-emit-cfg --backend-emit-cg file.exe

The former parameter enables the generation of control-flow graphs while the latter enables the generation of a call graph.

After the decompilation finishes, you should see PNG images in the same directory where the input file is located, which are the control-flow and call graphs. If you do not see any images, it either means there was an error (probably Graphviz has not been installed properly) or there are no functions in the file you are trying to decompile.

BTW, if you want something else than a PNG image, you can use the --graph-format parameter, whose value can be png, pdf, or svg.

[MBilalQureshi]

@s3rvac thank you so much i knew you would reply, Its says please install graphviz to generate graphics where as it is already installed but is in Program files folder do i need to put it in retdec folder if yes than in retdec which folder.

[s3rvac]

You will need to add the folder containing dot.exe etc. into Path so that RetDec can find it (HOWTO).

BTW, in commit fe27942, I have added this piece of information into the error message to make this fact more obvious for people who stumble upon it in the future.

[MBilalQureshi]

@s3rvac thank you so much this helped me alot, sorry for late reply. I will contact you if i found any more issue again thank you :)