After analysing a function and pressing
VV to go into graph mode, is it somehow possible to export/render the whole graph to an image?
I have some huge main functions and it would be nice to have it all in an image for better exploring it.
ag command and subcommands can help you to output the visual graph into Graphviz format.
[0x00000000]> ag? Usage: ag<graphtype><format> [addr] Graph commands: | aga[format] Data references graph .... | agf[format] Basic blocks function graph .... Output formats: | <blank> Ascii art | * r2 commands | d Graphviz dot | g Graph Modelling Language (gml) | j json ('J' for formatted disassembly) | k SDB key-value | t Tiny ascii art | v Interactive ascii art | w [path] Write to path or display graph image (see graph.gv.format and graph.web)
For example, you can output the visual graph as a dot file and then convert it to PNG. Here's an example to create an image from the main function of /bin/ls:
$ r2 /bin/ls [0x004049a0]> aa [x] Analyze all flags starting with sym. and entry0 (aa) [0x004049a0]> agfd main > graph.dot [0x004049a0]> !!dot -Tpng -o graph.png graph.dot
dot utility is part of the Graphviz software which can be installed using
sudo apt-get install graphviz.
You can also output the graph into ascii-graph using the
[0x004049a0]> s main [0x00402a00]> agf > ascii_graph.txt
Moreover, if you are just searching for a comfort way to view the graph you can simply open the dot file inside Graphviz or use an online Graphviz viewer instead of converting it to an image file.