[LTP] [RFC PATCH 1/9] lib: Add support for guarded buffers

[Cyril Hrubis]

Hi!
> >> This commit adds a support for guarder buffers. Guarded buffer is a
> >> buffer allocated so that there is PROT_NONE page immediatelly after the
> >> end of the buffer i.e. any access after the buffer generates
> >> SEGFAULT/EFAULT etc.
> >> 
> >> The library is hooked into the tst_test structure so that all you need
> >> is to fill up an NULL terminated array of buffer pointers and sizes to
> >> get the respective buffers allocated. The library supports allocating
> >> memory in test runtime as well as well as allocating more complex
> >> buffers, which currently are iovec vectors.
> >
> > Runtime alloc in loop could be an issue, do we need also runtime free?
> 
> I think tst_alloc needs a bit more documentation at the least.

I will write an paragraph to test-writing-guidelines.txt about this
functionality.

> If we have runtime free then we need to figure out which map the
> address belongs to or what its offset is (if any).

That's easy, we will store the returned pointer to the map structure
and use it for comparsion...

-- 
Cyril Hrubis
chrubis@suse.cz