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       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                 :    34391311 : __libdw_findabbrev (struct Dwarf_CU *cu, unsigned int code)
      40                 :             : {
      41                 :    34391311 :   Dwarf_Abbrev *abb;
      42                 :             : 
      43                 :             :   /* Abbreviation code can never have a value of 0.  */
      44         [ +  + ]:    34391311 :   if (unlikely (code == 0))
      45                 :             :     return DWARF_END_ABBREV;
      46                 :             : 
      47                 :             :   /* See whether the entry is already in the hash table.  */
      48                 :    34391305 :   abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code);
      49         [ +  + ]:    34391305 :   if (abb == NULL)
      50         [ +  + ]:     2599503 :     while (cu->last_abbrev_offset != (size_t) -1l)
      51                 :             :       {
      52                 :     2599499 :         size_t length;
      53                 :             : 
      54                 :             :         /* Find the next entry.  It gets automatically added to the
      55                 :             :            hash table.  */
      56                 :     2599499 :         mutex_lock (cu->abbrev_lock);
      57                 :     2599499 :         abb = __libdw_getabbrev (cu->dbg, cu, cu->last_abbrev_offset, &length);
      58                 :             : 
      59         [ +  + ]:     2599499 :         if (abb == NULL || abb == DWARF_END_ABBREV)
      60                 :             :           {
      61                 :             :             /* Make sure we do not try to search for it again.  */
      62                 :           2 :             cu->last_abbrev_offset = (size_t) -1l;
      63                 :           2 :             mutex_unlock (cu->abbrev_lock);
      64                 :           2 :             return DWARF_END_ABBREV;
      65                 :             :           }
      66                 :             : 
      67                 :     2599497 :         cu->last_abbrev_offset += length;
      68                 :     2599497 :         mutex_unlock (cu->abbrev_lock);
      69                 :             : 
      70                 :             :         /* Is this the code we are looking for?  */
      71         [ +  + ]:     2599497 :         if (abb->code == code)
      72                 :             :           break;
      73                 :             :       }
      74                 :             : 
      75                 :             :   /* This is our second (or third, etc.) call to __libdw_findabbrev
      76                 :             :      and the code is invalid.  */
      77         [ +  + ]:      535003 :   if (unlikely (abb == NULL))
      78                 :          12 :     abb = DWARF_END_ABBREV;
      79                 :             : 
      80                 :             :   return abb;
      81                 :             : }
      82                 :             : 
      83                 :             : 
      84                 :             : int
      85                 :    53429497 : dwarf_tag (Dwarf_Die *die)
      86                 :             : {
      87                 :             :   /* Find the abbreviation entry.  */
      88                 :    53429497 :   Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL);
      89         [ +  + ]:    53429497 :   if (unlikely (abbrevp == DWARF_END_ABBREV))
      90                 :             :     {
      91                 :       12138 :       __libdw_seterrno (DWARF_E_INVALID_DWARF);
      92                 :       12138 :       return DW_TAG_invalid;
      93                 :             :     }
      94                 :             : 
      95                 :    53417359 :   return abbrevp->tag;
      96                 :             : }
      97                 :             : INTDEF(dwarf_tag)