[Bug sanitizer/70717] New: -fsanitize=object-size as warning

["aleks at physik dot tu-berlin.de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70717

            Bug ID: 70717
           Summary: -fsanitize=object-size as warning
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: aleks at physik dot tu-berlin.de
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
  Target Milestone: ---

a new warning could detect problems earlier than "-fsanitize=object-size".
The following code is wrong, should be detected by "-fsanitize=object-size",
but it could be detected already at compile-time, especially for
memset/memcpy/memcmp .

char a[8], b[16]; memcpy(a,b,sizeof(b)); // write out of bounds, a[8..15] does
not exist

Thanks for reading