Line data    Source code

       1             : /* Return scope DIEs containing given DIE.
       2             :    Copyright (C) 2005, 2015 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             : #include "libdwP.h"
      33             : #include <assert.h>
      34             : #include <stdlib.h>
      35             : 
      36             : static int
      37     6679188 : scope_visitor (unsigned int depth, struct Dwarf_Die_Chain *die, void *arg)
      38             : {
      39     6679188 :   if (die->die.addr != *(void **) arg)
      40             :     return 0;
      41             : 
      42        8150 :   Dwarf_Die *scopes = malloc (depth * sizeof scopes[0]);
      43        8150 :   if (scopes == NULL)
      44             :     {
      45           0 :       __libdw_seterrno (DWARF_E_NOMEM);
      46           0 :       return -1;
      47             :     }
      48             : 
      49             :   unsigned int i = 0;
      50       41023 :   do
      51             :     {
      52       41023 :       scopes[i++] = die->die;
      53       41023 :       die = die->parent;
      54             :     }
      55       41023 :   while (die != NULL);
      56        8150 :   assert (i == depth);
      57             : 
      58        8150 :   *(void **) arg = scopes;
      59        8150 :   return depth;
      60             : }
      61             : 
      62             : int
      63        8150 : dwarf_getscopes_die (Dwarf_Die *die, Dwarf_Die **scopes)
      64             : {
      65        8150 :   if (die == NULL)
      66             :     return -1;
      67             : 
      68       16300 :   struct Dwarf_Die_Chain cu = { .die = CUDIE (die->cu), .parent = NULL };
      69        8150 :   void *info = die->addr;
      70        8150 :   int result = __libdw_visit_scopes (1, &cu, NULL, &scope_visitor, NULL, &info);
      71        8150 :   if (result > 0)
      72        8150 :     *scopes = info;
      73             :   return result;
      74             : }