pretty printing rust with rr

rust-rr-pp.md

using rust pretty printers with rr

rr is a great debugging tool. it records a trace of a program's execution, as well as the results of any syscalls it executes, so that you can "rewind" while you debug, and get deterministic forward and reverse instrumented playback. it works with rust, but by default if you try it out, it could be pretty ugly when you inspect variables.

install

steps:

1. get the rust pretty printer python script
2. configure gdb to automatically load it

~/.gdbinit:

python                                                                                                                                                                                                                                                         
import sys  

# set this to the path of the pretty printer
sys.path.insert(0, '/path/to/src/rust/src/etc/')

import gdb_rust_pretty_printing                                                                                                                                                                                                                                

gdb_rust_pretty_printing.register_printers(gdb)                                                                                                                                                                                                                
end