gdb: set a breakpoint for a SIGBUS handler

Question

I\'m trying to debug a simple stop-and-copy garbage collector (written in C) using GDB. The GC works by handling SIGBUS. I\'ve set a breakpoint at the top of my SIGBUS signal ha

Answer 1

The same code (modified to handle SIGSEGV too) works as expected in GDB on Linux; it may be a bug in OS X or GDB's port to that platform.

Googling finds broken OS X behavior just like yours all the way back on 10.1, with a sort-of workaround (set inferior-bind-exception-port off before running the program).

(There's a similar bug on Windows.)