10812 ctf tools shouldn't add blank labels
10813 ctf symbol mapping needs work
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

*** 23,33 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  /*
!  * Copyright (c) 2015, Joyent, Inc.
   */
  
  #include <sys/sysmacros.h>
  #include <sys/param.h>
  #include <sys/mman.h>
--- 23,33 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  /*
!  * Copyright (c) 2019, Joyent, Inc.
   */
  
  #include <sys/sysmacros.h>
  #include <sys/param.h>
  #include <sys/mman.h>
*** 2124,2133 ****
--- 2124,2134 ----
          if ((dld->dld_name = ctf_strdup(name)) == NULL) {
                  ctf_free(dld, sizeof (ctf_dldef_t));
                  return (ctf_set_errno(fp, EAGAIN));
          }
  
+         ctf_dprintf("adding label %s, %ld\n", name, type);
          dld->dld_type = type;
          fp->ctf_dtstrlen += strlen(name) + 1;
          ctf_dld_insert(fp, dld, position);
          fp->ctf_flags |= LCTF_DIRTY;