Should there be a gdb_test_backtrace?

[Andrew Cagney]

> I think gdb_test_backtrace would be an interesting idea.
> Also, it could implement an output limit.  Sometimes
> gdb goes into an infinite backtrace and it would be nice
> if gdb_test_backtrace gave a special FAIL when it saw
> stack frame #1000 and killed gdb.

Supplemental question :-)  Should there be a gdb_test_list to go with / 
supersede gdb_expect_list?

Andrew