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Re: How to identify the version of the LLVM AddressSanitizer integrated to GCC 4.9.3 and after


On 31/03/16 18:20, Gayan Pathirage wrote:
Hi Maxim,

Thanks a lot for the information. I find it very useful for my future tests.

Also I found this page maintained by ASAN developers
https://github.com/google/sanitizers/wiki/AddressSanitizerClangVsGCC
which lists some of the differences.

Yes, but please note, that this page describes differences between two particular revisions. For current trunk (and release) GCC and LLVM versions the situation might be different.


Finally any plans to integrate other sanitizer tools by LLVM in to
GCC, like Memory Sanitizer, Data Flow Sanitizer ?

AFAIK, there aren't any plans on porting MSan and DFSan to GCC (see https://gcc.gnu.org/ml/gcc/2014-10/msg00000.html for MSan). TSan and UBSan are already present in GCC.

-Maxim


Best Regards,

Gayan

On Thu, Mar 31, 2016 at 4:40 PM, Maxim Ostapenko
<m.ostapenko@samsung.com> wrote:
Hi.

On 31/03/16 12:52, Gayan Pathirage wrote:
Hi,

I find it difficult to locate the information regarding the version of
the sanitizers (i.e. LLVM Sanitizers) integrated with GCC 4.9.3. Could
anyone suggest me a location where I can find this information.

This is indeed difficult. AFAIK, there isn't any mapping between LLVM and
GCC ASan releases, we just merge sanitizer library from upstream to GCC
source tree from time to time. GCC wiki doesn't have a dedicated page for
AddressSanitizer, so I suppose that the most appropriate method for
discovering such an information is just looking into ASan source code.

My question is due to some of the run time flags defined in ASAN is
not recognized in GCC based binary (i.e. GCC 4.9.3). e.g.
ASAN_OPTIONS=help=1:halt_on_error=0

ASAN_OPTIONS=help=1 was introduced in GCC 5 and ASAN_OPTIONS=halt_on_error
will be available in GCC 6.

Also what is the GCC policy behind updating LLVM sanitizers to their
latest version?

As I mentioned above, we merge sanitizer library from upstream to GCC source
tree from time to time during the active development stage (stage 1, see
https://gcc.gnu.org/develop.html).

-Maxim

Rgds,

Gayan





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