[Bug analyzer/105899] RFE: -fanalyzer could complain about misuses of standard C string APIs

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105899

--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by David Malcolm <dmalc...@gcc.gnu.org>:

https://gcc.gnu.org/g:b51cde34d4e7504e821d935152c0ece0ce0dc74d

commit r14-3740-gb51cde34d4e7504e821d935152c0ece0ce0dc74d
Author: David Malcolm <dmalc...@redhat.com>
Date:   Wed Sep 6 09:32:01 2023 -0400

    analyzer: implement kf_strncpy [PR105899]

    gcc/analyzer/ChangeLog:
            PR analyzer/105899
            * kf.cc (class kf_strncpy): New.
            (kf_strncpy::impl_call_post): New.
            (register_known_functions): Register it.
            * region-model.cc (region_model::read_bytes): Handle unknown
            number of bytes.

    gcc/testsuite/ChangeLog:
            PR analyzer/105899
            * c-c++-common/analyzer/null-terminated-strings-2.c: New test.
            * c-c++-common/analyzer/overlapping-buffers.c: Update dg-bogus
            directives to avoid clashing with note from <string.h> that might
            happen to have the same line number.  Add strpncpy test coverage.
            * c-c++-common/analyzer/strncpy-1.c: New test.
            * gcc.dg/analyzer/null-terminated-strings-1.c
            (test_filled_nonzero): New.
            (void test_filled_zero): New.
            (test_filled_symbolic): New.

    Signed-off-by: David Malcolm <dmalc...@redhat.com>