Branch data     Line data    Source code

       1                 :            : /* Check whether given DIE has specific attribute.
       2                 :            :    Copyright (C) 2003, 2005, 2014, 2017 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 <dwarf.h>
      35                 :            : #include "libdwP.h"
      36                 :            : 
      37                 :            : 
      38                 :            : int
      39                 :   24700596 : dwarf_hasattr (Dwarf_Die *die, unsigned int search_name)
      40                 :            : {
      41         [ +  - ]:   24700596 :   if (die == NULL)
      42                 :            :     return 0;
      43                 :            : 
      44                 :            :   /* Find the abbreviation entry.  */
      45                 :   24700596 :   Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL);
      46         [ -  + ]:   24700596 :   if (unlikely (abbrevp == DWARF_END_ABBREV))
      47                 :            :     {
      48                 :          0 :       __libdw_seterrno (DWARF_E_INVALID_DWARF);
      49                 :          0 :       return 0;
      50                 :            :     }
      51                 :            : 
      52                 :            :   /* Search the name attribute.  Dwarf_Abbrev was checked when created,
      53                 :            :      so we can read unchecked here.  */
      54                 :   24700596 :   const unsigned char *attrp = abbrevp->attrp;
      55                 :  122521156 :   while (1)
      56                 :            :     {
      57                 :            :       /* Get attribute name and form.  */
      58                 :  122521156 :       unsigned int attr_name;
      59                 :  122521156 :       get_uleb128_unchecked (attr_name, attrp);
      60                 :  122521156 :       unsigned int attr_form;
      61                 :  122521156 :       get_uleb128_unchecked (attr_form, attrp);
      62                 :            : 
      63                 :            :       /* We can stop if we found the end of the attribute list.  */
      64         [ +  + ]:  122521156 :       if (attr_name == 0 && attr_form == 0)
      65                 :            :         return 0;
      66                 :            : 
      67         [ +  + ]:   98004966 :       if (attr_name == search_name)
      68                 :            :         return 1;
      69                 :            : 
      70         [ +  + ]:   97820560 :       if (attr_form == DW_FORM_implicit_const)
      71                 :            :         {
      72                 :     437882 :           int64_t attr_value __attribute__ ((unused));
      73                 :     437882 :           get_sleb128_unchecked (attr_value, attrp);
      74                 :            :         }
      75                 :            :     }
      76                 :            : }
      77                 :            : INTDEF (dwarf_hasattr)