A few basic Lisp commands while in debugger (gdb)?

Hi, I remember vaguely that there have been added a few useful, simple functions for Lisp, which can be used during a gdb session, but I can't currently find them... Could anybody please point me to them? Thanks, Paul P.S. This would probably help debugging an android thread issue, happening only on a few recent devices; at least I already figured how to run gdbserver on android, and debug from the PC.