[Bug gdb/12616] gdb does not implement DW_AT_data_bit_offset

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

https://sourceware.org/bugzilla/show_bug.cgi?id=12616

--- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andreas Arnez <arnez@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=da5b30da2d1167591aa8d71b543f97bfdc2ec2a2

commit da5b30da2d1167591aa8d71b543f97bfdc2ec2a2
Author: Andreas Arnez <arnez@linux.vnet.ibm.com>
Date:   Thu Nov 24 17:48:03 2016 +0100

    Fix PR12616 - gdb does not implement DW_AT_data_bit_offset

    The DW_AT_data_bit_offset attribute was introduced by DWARF V4 and
    allows specifying the offset of a data member within its containing
    entity.  But although the new attribute was intended to replace
    DW_AT_bit_offset for this purpose, GDB ignores it, and thus GCC still
    emits DW_AT_bit_offset instead.  See also
    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71669.

    This change fixes GDB's lack of support for DW_AT_data_bit_offset and
    adds an appropriate test case.

    gdb/ChangeLog:

        PR gdb/12616
        * dwarf2read.c (dwarf2_add_field): Handle the DWARF V4 attribute
        DW_AT_data_bit_offset.

    gdb/testsuite/ChangeLog:

        PR gdb/12616
        * gdb.dwarf2/nonvar-access.exp: New testcase.  Check that GDB
        respects the DW_AT_data_bit_offset attribute.

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