new option --readnever & script gstack?

[Frank Ch. Eigler]

eliz wrote:

> It sounds like the -readnever option you propose would be useful only
> in the pstack-like situation.  So how about adding a -pstack option
> which will do whatever it takes for GDB to emulate pstack, i.e. avoid
> reading the symbols, produce a backtrace, and then detach from the
> process?

Or alternately, could the "asneeded" setting stay as it is, but extend
gdb's backtrace command to have a sufficiently non-symbolic mode,
where the "asneeded" data would not be needed and thus not loaded?

- FChE