PathDB is already used in production on Linux by many PathScale customers for x86 and x86_64. The project has been dormant for the past few years, but recently open sourced under the CDDL. By using C++ the original author was able to build a GDB-like command line interface with a fraction of the code required for GDB itself. An early port to FreeBSD now exists and there’s progress for it to be ported to every major platform. Please visit the Wishlist page and let us know what you need.