SafeStack in base

[Ed Schouten]

Hi Conrad,

2016-07-28 2:02 GMT+02:00 Conrad Meyer <cem at freebsd.org>:
> The problem appears to be an upstream limitation of
> -fsanitize=safe-stack: "Most programs, static libraries, or individual
> files can be compiled with SafeStack as is. … Linking a DSO with
> SafeStack is not currently supported." [0]

I'm not sure, but I thought the reason for this is due to the fact
that SafeStack uses some kind of additional library to wrap around
pthread_create() to create threads that have SafeStack properly set
up.

If we were to actually integrate this functionality into our C
runtime/pthread library to create threads with two stacks by default,
then I couldn't think of a reason why it shouldn't work with DSOs.
SafeStack merely depends on an additional TLS variable -- nothing
else.

-- 
Ed Schouten <ed at nuxi.nl>
Nuxi, 's-Hertogenbosch, the Netherlands
KvK-nr.: 62051717