[Bug analyzer/112977] -Wanalyzer-tainted-offset false positive seen on Linux kernel's drivers/scsi/aacraid/aachba.c

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112977

--- Comment #2 from GCC 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:e503f9aca9192654d83f141ae7865a3c9d90bf0d

commit r14-8391-ge503f9aca9192654d83f141ae7865a3c9d90bf0d
Author: David Malcolm <dmalc...@redhat.com>
Date:   Wed Jan 24 10:11:35 2024 -0500

    analyzer: fix taint false +ve due to overzealous state purging [PR112977]

    gcc/analyzer/ChangeLog:
            PR analyzer/112977
            * engine.cc (impl_region_model_context::on_liveness_change): Pass
            m_ext_state to sm_state_map::on_liveness_change.
            * program-state.cc (sm_state_map::on_svalue_leak): Guard removal
            of map entry based on can_purge_p.
            (sm_state_map::on_liveness_change): Add ext_state param.  Add
            workaround for bad interaction between state purging and
            alt-inherited sm-state.
            * program-state.h (sm_state_map::on_liveness_change): Add
            ext_state param.
            * sm-taint.cc
            (taint_state_machine::has_alt_get_inherited_state_p): New.
            (taint_state_machine::can_purge_p): Return false for "has_lb" and
            "has_ub".
            * sm.h (state_machine::has_alt_get_inherited_state_p): New vfunc.

    gcc/testsuite/ChangeLog:
            PR analyzer/112977
            * gcc.dg/plugin/plugin.exp: Add taint-pr112977.c.
            * gcc.dg/plugin/taint-pr112977.c: New test.

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