Jakub Jelinek <[email protected]> writes:
> On Mon, Nov 11, 2013 at 03:01:53PM +0100, Dodji Seketeli wrote:
>> Since a couple of days I am seeing failure on the tests above on my
>> Fedora system. The errors look like:
>>
>> FAIL: c-c++-common/asan/memcmp-1.c -O0 output pattern test, is
>> =================================================================
>> ==21832==ERROR: AddressSanitizer: stack-buffer-overflow on address
>> 0x7fff75df96f4 at pc 0x7f98ecbab68b bp 0x7fff75df96b0 sp
>> 0x7fff75df95b8
>> READ of size 6 at 0x7fff75df96f4 thread T0
>> #0 0x7f98ecbab68a in __interceptor_memcmp
>> /home/dodji/git/gcc/master/libsanitizer/asan/asan_interceptors.cc:295
>> (discriminator 7)
>> #1 0x7f98ecbb6393 in __asan_report_error
>> /home/dodji/git/gcc/master/libsanitizer/asan/asan_report.cc:774
>> (discriminator 9)
>> #2 0x7f98ecbab6d0 in __interceptor_memcmp
>> /home/dodji/git/gcc/master/libsanitizer/asan/asan_interceptors.cc:295
>> (discriminator 7)
>> #3 0x400b0a in main
>> /home/dodji/git/gcc/master/gcc/testsuite/c-c++-common/asan/memcmp-1.c:14
>
> That looks like a bug in libasan, __asan_report_error doesn't call memcmp
> again. So something is wrong with getting proper backtrace it seems.
Correct. I'll need to get familiar with the backtracing part then,
unless someone beats me to it.
--
Dodji
