On Fri, Dec 06, 2013 at 03:28:50PM +0400, Yury Gribov wrote:
> Hi all,
>
> GCC version of Asan currently lacks options for detailed control
> over code instrumentation. These are not usually necessary but for
> embedded systems with scarce system resources Asan memory overhead
> of 2x-3x may often be unacceptable.
>
This is implementation detail and may be gone with more effective
implementation of shadow memory. Then patch to add these may cease to be
usefull.
> It seems that LLVM provides some options to allow programmer select
> which part of his code/memory he's interested in:
> * -asan-instrument-reads
> * -asan-instrument-writes
> * -asan-memintrin
> * -asan-stack
> * -asan-globals
> * -blacklist
> These options allow one to selectively turn on Asan for separate
> parts of code / classes of memory thus reducing the net overhead.
>
> Would GCC community be interested of similiar functionality? We
> could start with implementing above options in 4.9.
>
