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fprintf: Print __attribute__((__aligned__(N))) for structs/classes 

For instance:

  $ pahole -C kern_ipc_perm /home/acme/git/build/v5.0-rc2+/ipc/util.o
  struct kern_ipc_perm {
        spinlock_t                 lock;                 /*     0     4 */
        bool                       deleted;              /*     4     1 */

        /* XXX 3 bytes hole, try to pack */

        int                        id;                   /*     8     4 */
        key_t                      key;                  /*    12     4 */
        kuid_t                     uid;                  /*    16     4 */
        kgid_t                     gid;                  /*    20     4 */
        kuid_t                     cuid;                 /*    24     4 */
        kgid_t                     cgid;                 /*    28     4 */
        umode_t                    mode;                 /*    32     2 */

        /* XXX 6 bytes hole, try to pack */

        long unsigned int          seq;                  /*    40     8 */
        void *                     security;             /*    48     8 */
        struct rhash_head          khtnode;              /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct callback_head       rcu __attribute__((__aligned__(8))); /*    64    16 */
        refcount_t                 refcount;             /*    80     4 */

        /* size: 128, cachelines: 2, members: 14 */
        /* sum members: 75, holes: 2, sum holes: 9 */
        /* padding: 44 */
        /* forced alignments: 1 */
  } __attribute__((__aligned__(64)));
  $

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2019-04-09 17:03:54 -03:00
parent 1c9c1d6bbd
commit b42d77b0bb
1 changed files with 7 additions and 2 deletions
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9
dwarves_fprintf.c
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@ -1608,8 +1608,13 @@ static size_t __class__fprintf(struct class *class, const struct cu *cu,
cconf.indent, tabs,
type->size, sum_bytes, sum_bits, sum_holes, sum_bit_holes, size_diff);
out:
return printed + fprintf(fp, "%.*s}%s%s", indent, tabs,
cconf.suffix ? " ": "", cconf.suffix ?: "");
printed += fprintf(fp, "%.*s}%s%s", indent, tabs, cconf.suffix ? " ": "", cconf.suffix ?: "");
if (type->alignment != 0)
printed += fprintf(fp, " __attribute__((__aligned__(%u)))", type->alignment);
return printed;
}
size_t class__fprintf(struct class *class, const struct cu *cu, FILE *fp)