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     1174350 : dwarf_attr_integrate (Dwarf_Die *die, unsigned int search_name,
      38             :                       Dwarf_Attribute *result)
      39             : {
      40             :   Dwarf_Die die_mem;
      41      696570 :   int chain = 16; /* Largest DIE ref chain we will follow.  */
      42             :   do
      43             :     {
      44      778099 :       Dwarf_Attribute *attr = INTUSE(dwarf_attr) (die, search_name, result);
      45      778099 :       if (attr != NULL)
      46             :         return attr;
      47             : 
      48      320419 :       attr = INTUSE(dwarf_attr) (die, DW_AT_abstract_origin, result);
      49      320419 :       if (attr == NULL)
      50      238933 :         attr = INTUSE(dwarf_attr) (die, DW_AT_specification, result);
      51      320419 :       if (attr == NULL)
      52             :         break;
      53             : 
      54       81529 :       die = INTUSE(dwarf_formref_die) (attr, &die_mem);
      55             :     }
      56       81529 :   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      716670 :   if (die != NULL && is_cudie (die)
      62          96 :       && die->cu->unit_type == DW_UT_split_compile)
      63             :     {
      64         498 :       Dwarf_CU *skel_cu = __libdw_find_split_unit (die->cu);
      65          83 :       if (skel_cu != NULL)
      66             :         {
      67         581 :           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)