How to have gdb exit if program succeeds, break if program crashes?

Question

I seem to have some kind of multithreading bug in my code that makes it crash once every 30 runs of its test suite. The test suite is non-interactive. I want to run my test

Answer 1

Make it dump core when it crashes. If you're on linux, read the man core man page and also the ulimit builtin if you're running bash.

This way when it crashes you'll find a nice corefile that you can feed to gdb:

$ ulimit -c unlimited
$ ... run program ..., gopher coffee (or reddit ;)
$ gdb progname corefile