Generate Call & Caller Graphs with Doxygen

Installation

Doxygen using dot from graphviz to generate graphs, install doxygen and its dependency:

sudo apt install doxygen -y
sudo apt-get install graphviz -y --allow-unauthenticated

Install with brew if using MacOS:

brew install doxygen
brew install graphviz

Configuration

Doxygen provides a self-explained example configuration file which can be generated with doxygen -g, it will create an example config file named Doxyfile.

Here we take android lmkd for example to generate call and caller graphs:

PROJECT_NAME           = "lmkd"

# generate output to doc
OUTPUT_DIRECTORY       = doc

EXTRACT_ALL            = YES
EXTRACT_STATIC         = YES

# disable latex output
GENERATE_LATEX         = NO

# call/caller graph need this to be enabled
HAVE_DOT               = YES

# generate call/caller graph
CALL_GRAPH             = YES
CALLER_GRAPH           = YES

# include body of functions into the documentation
INLINE_SOURCES         = YES

INLINE_SOURCES option is very useful, it will include the body of fuctions, classes and enums directly into the documentation, like this:

If the project has subdirectories, set RECURSIVE = YES.

Generate Call/Caller Graphs

Issue command doxygen Doxyfile will do the job for you, or just doxygen will be fine if you are using the default config file, here is an example call/caller graph taken from above generated doc: