[Bug sanitizer/80998] New: Implement -fsanitize=pointer-overflow

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80998

            Bug ID: 80998
           Summary: Implement -fsanitize=pointer-overflow
           Product: gcc
           Version: 7.0
               URL: https://reviews.llvm.org/rL304459
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                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,
                    marxin at gcc dot gnu.org, mpolacek at gcc dot gnu.org
  Target Milestone: ---

As LLVM recently did, we can also implement the same sanitizer:

https://wdtz.org/catching-pointer-overflow-bugs.html
https://reviews.llvm.org/D20322