Extend -fstack-protector-strong to cover calls with return slot

[Florian Weimer]

On 01/08/2014 03:57 PM, Florian Weimer wrote:

> What about the attached version?  It still does not exactly match your
> original suggestion because gimple_call_lhs (stmt) can be NULL_TREE if
> the result is ignored and this case needs instrumentation, as you
> explained, so I use the function return type in the aggregate_value_p
> check.
>
> Testing is still under way, but looks good so far.  I'm bootstrapping
> with BOOT_CFLAGS="-O2 -g -fstack-protector-strong" with Ada enabled, for
> additional coverage.

Testing passed without new regressions.  Is this okay for trunk?

-- 
Florian Weimer / Red Hat Product Security Team