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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug analyzer/106300] RFE: analyzer support for more ways of
 obtaining an open file descriptor
Date: Mon, 24 Oct 2022 20:49:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106300

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

https://gcc.gnu.org/g:792f039fc37faa3446725a643c8018f084e8ccab

commit r13-3466-g792f039fc37faa3446725a643c8018f084e8ccab
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Mon Oct 24 16:38:22 2022 -0400

    analyzer: handle "pipe" and "pipe2" [PR106300]

    gcc/analyzer/ChangeLog:
            PR analyzer/106300
            * engine.cc (impl_region_model_context::get_fd_map): New.
            * exploded-graph.h (impl_region_model_context::get_fd_map): New
            decl.
            * region-model-impl-calls.cc (region_model::impl_call_pipe): Ne=
w.
            * region-model.cc (region_model::update_for_int_cst_return): Ne=
w,
            based on...
            (region_model::update_for_zero_return): ...this.  Reimplement in
            terms of the former.
            (region_model::on_call_pre): Handle "pipe" and "pipe2".
            (region_model::on_call_post): Likewise.
            * region-model.h (region_model::impl_call_pipe): New decl.
            (region_model::update_for_int_cst_return): New decl.
            (region_model::mark_as_valid_fd): New decl.
            (region_model_context::get_fd_map): New pure virtual fn.
            (noop_region_model_context::get_fd_map): New.
            (region_model_context_decorator::get_fd_map): New.
            * sm-fd.cc: Include "analyzer/program-state.h".
            (fd_state_machine::describe_state_change): Handle transitions f=
rom
            start state to valid states.
            (fd_state_machine::mark_as_valid_fd): New.
            (fd_state_machine::on_stmt): Add missing return for "creat".
            (region_model::mark_as_valid_fd): New.

    gcc/ChangeLog:
            PR analyzer/106300
            * doc/invoke.texi (Static Analyzer Options): Add "pipe" and
            "pipe2" to the list of functions the analyzer has hardcoded
            knowledge of.

    gcc/testsuite/ChangeLog:
            PR analyzer/106300
            * gcc.dg/analyzer/pipe-1.c: New test.
            * gcc.dg/analyzer/pipe-glibc.c: New test.
            * gcc.dg/analyzer/pipe-manpages.c: New test.
            * gcc.dg/analyzer/pipe2-1.c: New test.

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