Question regarding multiple threads and segfaults

Question

What happens when two threads of the same process running on different logical cpu hit a seg fault?

Answer 1

Default action is for the process to exit. If you handle the segfault, I suppose you could try to arrange for just the thread where it happened to terminate. However, since the only things which cause a segfault to occur naturally (as opposed to raise or kill) stem from undefined behavior, the program is in an indeterminate state and you can't rely on being able to recover anything.