fprintf: Pretty print struct members that are pointers to nameless structs

I.e. to structs defined inside other structs, without a name:

Before:

  $ pahole -C parsed_partitions /home/acme/git/build/v5.1-rc4+/block/partitions/check.o
  struct parsed_partitions {
  	struct block_device *      bdev;                 /*     0     8 */
  	char                       name[32];             /*     8    32 */
  	struct  *                  parts;                /*    40     8 */
  	int                        next;                 /*    48     4 */
  	int                        limit;                /*    52     4 */
  	bool                       access_beyond_eod;    /*    56     1 */

  	/* XXX 7 bytes hole, try to pack */

  	/* --- cacheline 1 boundary (64 bytes) --- */
  	char *                     pp_buf;               /*    64     8 */

  	/* size: 72, cachelines: 2, members: 7 */
  	/* sum members: 65, holes: 1, sum holes: 7 */
  	/* last cacheline: 8 bytes */
  };
  $

After:

  $ pahole -C parsed_partitions /home/acme/git/build/v5.1-rc4+/block/partitions/check.o
  struct parsed_partitions {
  	struct block_device * bdev;                      /*     0     8 */
  	char                       name[32];             /*     8    32 */
  	struct {
  		sector_t           from;                 /*    40     8 */
  		sector_t           size;                 /*    48     8 */
  		int                flags;                /*    56     4 */
  		bool               has_info;             /*    60     1 */
  		struct partition_meta_info info;         /*    61   101 */
  	} * parts; /*    40     8 */
  	int                        next;                 /*    48     4 */
  	int                        limit;                /*    52     4 */
  	bool                       access_beyond_eod;    /*    56     1 */

  	/* XXX 7 bytes hole, try to pack */

  	/* --- cacheline 1 boundary (64 bytes) --- */
  	char *                     pp_buf;               /*    64     8 */

  	/* size: 72, cachelines: 2, members: 7 */
  	/* sum members: 65, holes: 1, sum holes: 7 */
  	/* last cacheline: 8 bytes */
  };
  $

Still need to align that offsets, leave this for later.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 file changed