pahole: Allow --compile to work with DWARF in addition to with BTF

The recent changes allow for that.

Generating a type in openvswitch and all it needs, recursively, from the
DWARF info for that project, then printing it out from the compileable
pahole output does a full circle and gets us back with the types pahole
generated from DWARF:

  $ pahole -C ovsrec_ssl --compile /usr/lib/debug/.dwz/openvswitch-2.17.0-3.fc36.x86_64 > ovs.c ; echo "static struct ovsrec_ssl foo;" >> ovs.c ; gcc -g -c ovs.c
  $ file ovs.o
  ovs.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), with debug_info, not stripped
  $ pahole ovs.o
  struct hmap_node {
  	size_t                     hash;                 /*     0     8 */
  	struct hmap_node *         next;                 /*     8     8 */

  	/* size: 16, cachelines: 1, members: 2 */
  	/* last cacheline: 16 bytes */
  };
  struct uuid {
  	uint32_t                   parts[4];             /*     0    16 */

  	/* size: 16, cachelines: 1, members: 1 */
  	/* last cacheline: 16 bytes */
  };
  struct ovs_list {
  	struct ovs_list *          prev;                 /*     0     8 */
  	struct ovs_list *          next;                 /*     8     8 */

  	/* size: 16, cachelines: 1, members: 2 */
  	/* last cacheline: 16 bytes */
  };
  struct ovsdb_idl_row {
  	struct hmap_node           hmap_node;            /*     0    16 */
  	struct uuid                uuid;                 /*    16    16 */
  	struct ovs_list            src_arcs;             /*    32    16 */
  	struct ovs_list            dst_arcs;             /*    48    16 */
  	/* --- cacheline 1 boundary (64 bytes) --- */
  	struct ovsdb_idl_table *   table;                /*    64     8 */
  	struct ovsdb_datum *       old_datum;            /*    72     8 */
  	_Bool                      parsed;               /*    80     1 */

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

  	struct ovs_list            reparse_node;         /*    88    16 */
  	struct ovsdb_datum *       new_datum;            /*   104     8 */
  	long unsigned int *        prereqs;              /*   112     8 */
  	long unsigned int *        written;              /*   120     8 */
  	/* --- cacheline 2 boundary (128 bytes) --- */
  	struct hmap_node           txn_node;             /*   128    16 */
  	long unsigned int *        map_op_written;       /*   144     8 */
  	struct map_op_list * *     map_op_lists;         /*   152     8 */
  	long unsigned int *        set_op_written;       /*   160     8 */
  	struct set_op_list * *     set_op_lists;         /*   168     8 */
  	unsigned int               change_seqno[3];      /*   176    12 */

  	/* XXX 4 bytes hole, try to pack */

  	/* --- cacheline 3 boundary (192 bytes) --- */
  	struct ovs_list            track_node;           /*   192    16 */
  	long unsigned int *        updated;              /*   208     8 */
  	struct ovsdb_datum *       tracked_old_datum;    /*   216     8 */

  	/* size: 224, cachelines: 4, members: 20 */
  	/* sum members: 213, holes: 2, sum holes: 11 */
  	/* last cacheline: 32 bytes */
  };
  struct hmap {
  	struct hmap_node * *       buckets;              /*     0     8 */
  	struct hmap_node *         one;                  /*     8     8 */
  	size_t                     mask;                 /*    16     8 */
  	size_t                     n;                    /*    24     8 */

  	/* size: 32, cachelines: 1, members: 4 */
  	/* last cacheline: 32 bytes */
  };
  struct smap {
  	struct hmap                map;                  /*     0    32 */

  	/* size: 32, cachelines: 1, members: 1 */
  	/* last cacheline: 32 bytes */
  };
  struct ovsrec_ssl {
  	struct ovsdb_idl_row       header_;              /*     0   224 */
  	/* --- cacheline 3 boundary (192 bytes) was 32 bytes ago --- */
  	_Bool                      bootstrap_ca_cert;    /*   224     1 */

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

  	char *                     ca_cert;              /*   232     8 */
  	char *                     certificate;          /*   240     8 */
  	struct smap                external_ids;         /*   248    32 */
  	/* --- cacheline 4 boundary (256 bytes) was 24 bytes ago --- */
  	char *                     private_key;          /*   280     8 */

  	/* size: 288, cachelines: 5, members: 6 */
  	/* sum members: 281, holes: 1, sum holes: 7 */
  	/* last cacheline: 32 bytes */
  };
  $

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

1 files changed, 0 insertions, 5 deletions

diff --git a/pahole.c b/pahole.c
index 9d9bf47f..1f844e3f 100644
--- a/pahole.c
+++ b/pahole.c
@@ -2999,11 +2999,6 @@ static enum load_steal_kind pahole_stealer(struct cu *cu,
 {
 	int ret = LSK__DELETE;
 
-	if (compilable && strcmp(cu->dfops->name, "btf")) {
-		fprintf(stderr, "pahole: --compile currently only works with BTF.\n");
-		return LSK__STOP_LOADING;
-	}
-
 	if (!cu__filter(cu))
 		goto filter_it;