libdtrace: attempt to resolve FORWARD types to concrete types

*** 39,48 ****
--- 39,49 ----
  #include <assert.h>
  #include <errno.h>
  
  #include <dt_impl.h>
  #include <dt_grammar.h>
+ #include <dt_module.h>
  #include <dt_parser.h>
  #include <dt_provider.h>
  
  static void dt_cg_node(dt_node_t *, dt_irlist_t *, dt_regset_t *);
  
*** 68,89 ****
   * the actual definition and then call ctf_member_info on the result.
   */
  static ctf_file_t *
  dt_cg_membinfo(ctf_file_t *fp, ctf_id_t type, const char *s, ctf_membinfo_t *mp)
  {
!         while (ctf_type_kind(fp, type) == CTF_K_FORWARD) {
!                 char n[DT_TYPE_NAMELEN];
!                 dtrace_typeinfo_t dtt;
! 
!                 if (ctf_type_name(fp, type, n, sizeof (n)) == NULL ||
!                     dt_type_lookup(n, &dtt) == -1 || (
!                     dtt.dtt_ctfp == fp && dtt.dtt_type == type))
!                         break; /* unable to improve our position */
! 
!                 fp = dtt.dtt_ctfp;
!                 type = ctf_type_resolve(fp, dtt.dtt_type);
!         }
  
          if (ctf_member_info(fp, type, s, mp) == CTF_ERR)
                  return (NULL); /* ctf_errno is set for us */
  
          return (fp);
--- 69,79 ----
   * the actual definition and then call ctf_member_info on the result.
   */
  static ctf_file_t *
  dt_cg_membinfo(ctf_file_t *fp, ctf_id_t type, const char *s, ctf_membinfo_t *mp)
  {
!         dt_resolve_forward_decl(&fp, &type);
  
          if (ctf_member_info(fp, type, s, mp) == CTF_ERR)
                  return (NULL); /* ctf_errno is set for us */
  
          return (fp);