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Re: [PATCH][RFA] Fix -fstack-check with really big frames on aarch64
On Thu, Jun 22, 2017 at 08:42:54PM +0200, Richard Biener wrote:
> >The thought of scanning the assembly code or RTL is too painful to
> >contemplate. THus I've been pondering having the prologue expanders
> >emit notes into the dump file about what they did and why WRT probing.
> >Or maybe we should use the unit testing framewhere here. Hmmm....
> I've been thinking that for Linux the kernel should have a way (/proc/pid controlled) to only extend the stack mapping for faults to the page exactly below the current end of the mapping. So we'd get a segfault for any missed probe.
> Just for QA purposes of course, I expect too many false positives in a full system.
Or valgrind could have such a tool or option.