On Thu, Mar 04, 2021 at 07:02:27AM -0500, Carol Bouchard wrote:
> It's going to require more than removing the hack due to the following:
>
> /* Storage for the alternate signal stack. */
> static union
> {
> char buffer[SIGSTKSZ];
>
> /* These other members are for proper alignment. There's no
> standard way to guarantee stack alignment, but this seems enough
> in practice. */
> long double ld;
> long l;
> void *p;
> } alternate_signal_stack;
A "simple" option is to just stop using SIGSTKSZ here, and define
your own constant - pick it based on worst case real world SIGSTKSZ
that you'll expect. Perhaps stick in an assert in the code too, to
abort the process at runtime if the real value is larger.
A alternative solution is to stop statically allocating the
struct and instead malloc it at startup. If there's no convenient
place todo the alloc, you could possibly use an __attribute__(constructor)
function that will get invoked by the dyn loader at startup for you,
before main() even runs.
Regards,
Daniel
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