Heaptrack mostly works out of the box with Rust and is very helpful. However, there's one snag -- it doesn't demangle Rust symbols automatically. It would be great if it did this though! 

There's a C library which implements Rust demangling here: https://github.com/LykenSol/rust-demangle.c

And https://github.com/rui314/mold/issues/371 might contain some more useful context.