[Bug analyzer/105898] New: RFE: -fanalyzer should complain about overlapping args to memcpy and mempcpy

[dmalcolm at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105898

            Bug ID: 105898
           Summary: RFE: -fanalyzer should complain about overlapping args
                    to memcpy and mempcpy
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: analyzer
          Assignee: dmalcolm at gcc dot gnu.org
          Reporter: dmalcolm at gcc dot gnu.org
            Blocks: 105887
  Target Milestone: ---

See:
 
https://clang.llvm.org/docs/analyzer/checkers.html#alpha-unix-cstring-bufferoverlap-c

Seems fairly easy to detect the "definitely overlaps" case with the region
model.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105887
[Bug 105887] RFE: clang analyzer warnings that GCC's -fanalyzer could implement