rust-callgraph

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• rust-callgraph

Computes the callgraph of rust programs.

Based on [[https://github.com/nrc/callgraph.rs]], updated to be compilable with the current rustc API.

• Usage #+BEGIN_SRC sh cargo +nightly r -- example_code/fun_method.rs --sysroot /usr/local/ #+END_SRC

Adapt the path of the sysroot, e. g. ~/home/felix/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/~.

The arguments are passed to a call to rustc.

• How it works

Using the rustc interface, run the compiler until after analysis stage, walk the expanded syntax tree and remember function and method definitions and resolved calls.

• Features Extracts all kinds of calls:

• function defs
• struct associated impl methods
• trait method declarations
• trait method default impl
• trait method implementations
• statically dispatched calls
• dynamically dispatched calls

Missing features:

• requires a nightly toolchain (this will not change since the rustc interface will not be stabilized)
• runs a single rustc commandline, no support to build a whole cargo project
• rudimentary debugging output, no real output