Line data    Source code

       1             : /* Return tag of given DIE.
       2             :    Copyright (C) 2003-2011, 2014 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2003.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include "libdwP.h"
      35             : 
      36             : 
      37             : Dwarf_Abbrev *
      38             : internal_function
      39    36214644 : __libdw_findabbrev (struct Dwarf_CU *cu, unsigned int code)
      40             : {
      41             :   Dwarf_Abbrev *abb;
      42             : 
      43             :   /* Abbreviation code can never have a value of 0.  */
      44    36214644 :   if (unlikely (code == 0))
      45             :     return DWARF_END_ABBREV;
      46             : 
      47             :   /* See whether the entry is already in the hash table.  */
      48    36214641 :   abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code, NULL);
      49    36214641 :   if (abb == NULL)
      50      622445 :     while (cu->last_abbrev_offset != (size_t) -1l)
      51             :       {
      52             :         size_t length;
      53             : 
      54             :         /* Find the next entry.  It gets automatically added to the
      55             :            hash table.  */
      56      622443 :         abb = __libdw_getabbrev (cu->dbg, cu, cu->last_abbrev_offset, &length,
      57             :                                  NULL);
      58      622443 :         if (abb == NULL || abb == DWARF_END_ABBREV)
      59             :           {
      60             :             /* Make sure we do not try to search for it again.  */
      61           1 :             cu->last_abbrev_offset = (size_t) -1l;
      62           1 :             return DWARF_END_ABBREV;
      63             :           }
      64             : 
      65      622442 :         cu->last_abbrev_offset += length;
      66             : 
      67             :         /* Is this the code we are looking for?  */
      68      622442 :         if (abb->code == code)
      69             :           break;
      70             :       }
      71             : 
      72             :   /* This is our second (or third, etc.) call to __libdw_findabbrev
      73             :      and the code is invalid.  */
      74    36214640 :   if (unlikely (abb == NULL))
      75           2 :     abb = DWARF_END_ABBREV;
      76             : 
      77    36214640 :   return abb;
      78             : }
      79             : 
      80             : 
      81             : int
      82    51375088 : dwarf_tag (Dwarf_Die *die)
      83             : {
      84             :   /* Find the abbreviation entry.  */
      85    51375088 :   Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL);
      86    51375088 :   if (unlikely (abbrevp == DWARF_END_ABBREV))
      87             :     {
      88        4409 :       __libdw_seterrno (DWARF_E_INVALID_DWARF);
      89        4409 :       return DW_TAG_invalid;
      90             :     }
      91             : 
      92    51370679 :   return abbrevp->tag;
      93             : }
      94             : INTDEF(dwarf_tag)