[PATCH] D19170: [safestack] Link SafeStack runtime only when not using separate stack segment

[Michael LeMay via cfe-commits]

mlemay-intel added a comment.

In http://reviews.llvm.org/D19170#402861, @eugenis wrote:

> Test, please.


Do you know of any examples of the sort of test that you would like to see for a feature like this?

> Where is this runtime support implemented? Some platform's libc, or an external library?


In my experience, supporting a separate stack segment seems to require a modified libc.  The whole program, including libc routines, needs to be recompiled to direct memory accesses to the appropriate segment.  This requires setting up an unsafe stack early enough that those recompiled routines can run successfully.


http://reviews.llvm.org/D19170