Branch data     Line data    Source code

       1                 :            : /* Peel type aliases and qualifier tags from a type DIE.
       2                 :            :    Copyright (C) 2014, 2015, 2016 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 "libdwP.h"
      34                 :            : #include <dwarf.h>
      35                 :            : #include <string.h>
      36                 :            : 
      37                 :            : 
      38                 :            : int
      39                 :     167222 : dwarf_peel_type (Dwarf_Die *die, Dwarf_Die *result)
      40                 :            : {
      41                 :     167222 :   int tag;
      42                 :            : 
      43                 :            :   /* Ignore previous errors.  */
      44         [ +  + ]:     167222 :   if (die == NULL)
      45                 :            :     return -1;
      46                 :            : 
      47                 :       9616 :   *result = *die;
      48                 :       9616 :   tag = INTUSE (dwarf_tag) (result);
      49                 :            : 
      50                 :            : /* Stack 8 of all these modifiers, after that it gets silly.  */
      51                 :            : #define MAX_DEPTH (8 * 8)
      52                 :       9616 :   int max_depth = MAX_DEPTH;
      53                 :       9616 :   while ((tag == DW_TAG_typedef
      54         [ +  + ]:      12787 :           || tag == DW_TAG_const_type
      55                 :       9637 :           || tag == DW_TAG_volatile_type
      56         [ +  + ]:       9637 :           || tag == DW_TAG_restrict_type
      57                 :       9616 :           || tag == DW_TAG_atomic_type
      58         [ +  - ]:       9616 :           || tag == DW_TAG_immutable_type
      59                 :       9616 :           || tag == DW_TAG_packed_type
      60         [ -  + ]:       9616 :           || tag == DW_TAG_shared_type)
      61         [ +  - ]:       3171 :         && max_depth-- > 0)
      62                 :            :     {
      63                 :       3171 :       Dwarf_Attribute attr_mem;
      64                 :       3171 :       Dwarf_Attribute *attr = INTUSE (dwarf_attr_integrate) (result, DW_AT_type,
      65                 :            :                                                              &attr_mem);
      66         [ +  - ]:       3171 :       if (attr == NULL)
      67                 :          0 :         return 1;
      68                 :            : 
      69         [ +  - ]:       3171 :       if (INTUSE (dwarf_formref_die) (attr, result) == NULL)
      70                 :            :         return -1;
      71                 :            : 
      72                 :       3171 :       tag = INTUSE (dwarf_tag) (result);
      73                 :            :     }
      74                 :            : 
      75         [ -  + ]:       9616 :   if (tag == DW_TAG_invalid || max_depth <= 0)
      76                 :          0 :     return -1;
      77                 :            : 
      78                 :            :   return 0;
      79                 :            : }
      80                 :            : INTDEF(dwarf_peel_type)