[Bug analyzer/106003] RFE: -fanalyzer could complain about misuse of file-descriptors

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106003

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Immad Mir <mir@gcc.gnu.org>:

https://gcc.gnu.org/g:97baacba963c06e3d0e33cde04e7e687671e60e7

commit r13-1404-g97baacba963c06e3d0e33cde04e7e687671e60e7
Author: Immad Mir <mirimmad17@gmail.com>
Date:   Sat Jul 2 22:09:37 2022 +0530

    analyzer: implement five new warnings for misuse of POSIX file descriptor
APIs [PR106003].

    This patch adds a new state machine to the analyzer for checking usage of
POSIX file descriptor
    APIs with five new warnings.

    It adds:
    - check for FD leaks (CWE 775).
    - check for double "close" of a FD (CWE-1341).
    - check for read/write of a closed file descriptor.
    - check whether a file descriptor was used without being checked for
validity.
    - check for read/write of a descriptor opened for just writing/reading.

    gcc/ChangeLog:
            PR analyzer/106003
            * Makefile.in (ANALYZER_OBJS): Add sm-fd.o.
            * doc/invoke.texi:  Add -Wanalyzer-fd-double-close,
-Wanalyzer-fd-leak,
            -Wanalyzer-fd-access-mode-mismatch,
-Wanalyzer-fd-use-without-check,
            -Wanalyzer-fd-use-after-close.

    gcc/analyzer/ChangeLog:
            PR analyzer/106003
            * analyzer.opt (Wanalyzer-fd-leak): New option.
            (Wanalyzer-fd-access-mode-mismatch): New option.
            (Wanalyzer-fd-use-without-check): New option.
            (Wanalyzer-fd-double-close): New option.
            (Wanalyzer-fd-use-after-close): New option.
            * sm.h (make_fd_state_machine): New decl.
            * sm.cc (make_checkers): Call make_fd_state_machine.
            * sm-fd.cc: New file.

    gcc/testsuite/ChangeLog:
            PR analyzer/106003
            * gcc.dg/analyzer/fd-1.c: New test.
            * gcc.dg/analyzer/fd-2.c: New test.
            * gcc.dg/analyzer/fd-3.c: New test.
            * gcc.dg/analyzer/fd-4.c: New test.