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From: "david.marchand at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug default/28060] [libabigail] Invalid offset for bitfields
Date: Wed, 07 Jul 2021 09:31:31 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28060

--- Comment #1 from David Marchand <david.marchand at redhat dot com> ---
pahole before_plop.o
struct bigstruct {
        char                       name[128];            /*     0   128 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        uint8_t                    bitfield0:1;          /*   128: 7  1 */

        /* size: 129, cachelines: 3, members: 2 */
        /* bit_padding: 7 bits */
        /* last cacheline: 1 bytes */
};

pahole after_plop.o
struct bigstruct {
        char                       name[128];            /*     0   128 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        uint8_t                    bitfield0:1;          /*   128: 7  1 */
        uint8_t                    bitfield1:1;          /*   128: 6  1 */

        /* size: 129, cachelines: 3, members: 3 */
        /* bit_padding: 6 bits */
        /* last cacheline: 1 bytes */
};

--=20
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