[Bug c/78666] conflicting attribute alloc_size accepted

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78666

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:

https://gcc.gnu.org/g:71ad0b5dde449ee1f6b755a99f5c52152e375835

commit r11-3239-g71ad0b5dde449ee1f6b755a99f5c52152e375835
Author: Martin Sebor <msebor@redhat.com>
Date:   Wed Sep 16 14:04:01 2020 -0600

    Detect conflicts between incompatible uses of the same attribute (PR
c/78666).

    Resolves:
    PR c/78666 - conflicting attribute alloc_size accepted
    PR c/96126 - conflicting attribute section accepted on redeclaration

    gcc/c-family/ChangeLog:

            PR c/78666
            PR c/96126
            * c-attribs.c (validate_attr_args): New function.
            (validate_attr_arg): Same.
            (handle_section_attribute): Call it.  Introduce a local variable.
            (handle_alloc_size_attribute):  Same.
            (handle_alloc_align_attribute): Same.

    gcc/testsuite/ChangeLog:

            PR c/78666
            PR c/96126
            * gcc.dg/attr-alloc_align-5.c: New test.
            * gcc.dg/attr-alloc_size-13.c: New test.
            * gcc.dg/attr-section.c: New test.
            * c-c++-common/builtin-has-attribute-3.c: Add xfails due to
expected
            warnings to be cleaned up.