Branch data     Line data    Source code

       1                 :            : /* Return specific DWARF attribute of a DIE, integrating indirections.
       2                 :            :    Copyright (C) 2005, 2018 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            : 
       5                 :            :    This file is free software; you can redistribute it and/or modify
       6                 :            :    it under the terms of either
       7                 :            : 
       8                 :            :      * the GNU Lesser General Public License as published by the Free
       9                 :            :        Software Foundation; either version 3 of the License, or (at
      10                 :            :        your option) any later version
      11                 :            : 
      12                 :            :    or
      13                 :            : 
      14                 :            :      * the GNU General Public License as published by the Free
      15                 :            :        Software Foundation; either version 2 of the License, or (at
      16                 :            :        your option) any later version
      17                 :            : 
      18                 :            :    or both in parallel, as here.
      19                 :            : 
      20                 :            :    elfutils is distributed in the hope that it will be useful, but
      21                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23                 :            :    General Public License for more details.
      24                 :            : 
      25                 :            :    You should have received copies of the GNU General Public License and
      26                 :            :    the GNU Lesser General Public License along with this program.  If
      27                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      28                 :            : 
      29                 :            : #ifdef HAVE_CONFIG_H
      30                 :            : # include <config.h>
      31                 :            : #endif
      32                 :            : 
      33                 :            : #include <dwarf.h>
      34                 :            : #include "libdwP.h"
      35                 :            : 
      36                 :            : Dwarf_Attribute *
      37                 :     892468 : dwarf_attr_integrate (Dwarf_Die *die, unsigned int search_name,
      38                 :            :                       Dwarf_Attribute *result)
      39                 :            : {
      40                 :     892468 :   Dwarf_Die die_mem;
      41                 :     892468 :   int chain = 16; /* Largest DIE ref chain we will follow.  */
      42                 :     968942 :   do
      43                 :            :     {
      44                 :     968942 :       Dwarf_Attribute *attr = INTUSE(dwarf_attr) (die, search_name, result);
      45         [ +  + ]:     968942 :       if (attr != NULL)
      46                 :     557358 :         return attr;
      47                 :            : 
      48                 :     411584 :       attr = INTUSE(dwarf_attr) (die, DW_AT_abstract_origin, result);
      49         [ +  + ]:     411584 :       if (attr == NULL)
      50                 :     335195 :         attr = INTUSE(dwarf_attr) (die, DW_AT_specification, result);
      51         [ +  + ]:     411584 :       if (attr == NULL)
      52                 :            :         break;
      53                 :            : 
      54                 :      76474 :       die = INTUSE(dwarf_formref_die) (attr, &die_mem);
      55                 :            :     }
      56   [ +  -  +  - ]:      76474 :   while (die != NULL && chain-- != 0);
      57                 :            : 
      58                 :            :   /* Not NULL if it didn't have abstract_origin and specification
      59                 :            :      attributes.  If it is a split CU then see if the skeleton
      60                 :            :      has it.  */
      61   [ +  -  +  + ]:     335110 :   if (die != NULL && is_cudie (die)
      62         [ +  + ]:         98 :       && die->cu->unit_type == DW_UT_split_compile)
      63                 :            :     {
      64                 :         83 :       Dwarf_CU *skel_cu = __libdw_find_split_unit (die->cu);
      65         [ +  - ]:         83 :       if (skel_cu != NULL)
      66                 :            :         {
      67                 :         83 :           Dwarf_Die skel_die = CUDIE (skel_cu);
      68                 :         83 :           return INTUSE(dwarf_attr) (&skel_die, search_name, result);
      69                 :            :         }
      70                 :            :     }
      71                 :            :   return NULL;
      72                 :            : }
      73                 :            : INTDEF (dwarf_attr_integrate)