Branch data     Line data    Source code

       1                 :            : /* Iterate through the CU units for a given Dwarf.
       2                 :            :    Copyright (C) 2016, 2017 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                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include <config.h>
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include <string.h>
      35                 :            : 
      36                 :            : #include "libdwP.h"
      37                 :            : 
      38                 :            : int
      39                 :      19856 : dwarf_get_units (Dwarf *dwarf, Dwarf_CU *cu, Dwarf_CU **next_cu,
      40                 :            :                  Dwarf_Half *version, uint8_t *unit_type,
      41                 :            :                  Dwarf_Die *cudie, Dwarf_Die *subdie)
      42                 :            : {
      43                 :            :   /* Handle existing error.  */
      44         [ +  - ]:      19856 :   if (dwarf == NULL)
      45                 :            :     return -1;
      46                 :            : 
      47                 :      19856 :   Dwarf_Off off;
      48                 :      19856 :   bool v4type;
      49         [ +  + ]:      19856 :   if (cu == NULL)
      50                 :            :     {
      51                 :            :       off = 0;
      52                 :            :       v4type = false;
      53                 :            :     }
      54                 :            :   else
      55                 :            :     {
      56                 :      15116 :       off = cu->end;
      57                 :      15116 :       v4type = cu->sec_idx != IDX_debug_info;
      58                 :            : 
      59                 :            :       /* Make sure we got a real (not fake) CU.  */
      60         [ -  + ]:      15116 :       if (cu->sec_idx != IDX_debug_info && cu->sec_idx != IDX_debug_types)
      61                 :            :         {
      62                 :          0 :           __libdw_seterrno (DWARF_E_INVALID_OFFSET);
      63                 :          0 :           return -1;
      64                 :            :         }
      65                 :            : 
      66                 :            :       /* Do we have to switch to the other section, or are we at the end?  */
      67         [ +  + ]:      15116 :       if (! v4type)
      68                 :            :         {
      69         [ +  + ]:      15092 :           if (off >= cu->dbg->sectiondata[IDX_debug_info]->d_size)
      70                 :            :             {
      71         [ +  + ]:        356 :               if (cu->dbg->sectiondata[IDX_debug_types] == NULL)
      72                 :            :                 return 1;
      73                 :            : 
      74                 :            :               off = 0;
      75                 :            :               v4type = true;
      76                 :            :             }
      77                 :            :         }
      78                 :            :       else
      79         [ +  + ]:         24 :         if (off >= cu->dbg->sectiondata[IDX_debug_types]->d_size)
      80                 :            :           return 1;
      81                 :            :     }
      82                 :            : 
      83                 :      19502 :   *next_cu = __libdw_findcu (dwarf, off, v4type);
      84         [ +  + ]:      19502 :   if (*next_cu == NULL)
      85                 :            :     return -1;
      86                 :            : 
      87                 :      19484 :   Dwarf_CU *next = (*next_cu);
      88                 :            : 
      89         [ +  + ]:      19484 :   if (version != NULL)
      90                 :       5858 :     *version = next->version;
      91                 :            : 
      92         [ +  + ]:      19484 :   if (unit_type != NULL)
      93                 :      12784 :     *unit_type = next->unit_type;
      94                 :            : 
      95         [ +  + ]:      19484 :   if (cudie != NULL)
      96                 :            :     {
      97         [ +  - ]:      10584 :       if (next->version >= 2 && next->version <= 5
      98         [ +  - ]:      10584 :           && next->unit_type >= DW_UT_compile
      99         [ +  - ]:      10584 :           && next->unit_type <= DW_UT_split_type)
     100                 :      10584 :         *cudie = CUDIE (next);
     101                 :            :       else
     102                 :          0 :         memset (cudie, '\0', sizeof (Dwarf_Die));
     103                 :            :     }
     104                 :            : 
     105         [ +  + ]:      19484 :   if (subdie != NULL)
     106                 :            :     {
     107         [ +  - ]:       9226 :       if (next->version >= 2 && next->version <= 5)
     108                 :            :         {
     109                 :            :           /* For types, return the actual type DIE.  For skeletons,
     110                 :            :              find the associated split compile unit and return its
     111                 :            :              DIE.  */
     112                 :       9226 :           if (next->unit_type == DW_UT_type
     113         [ +  + ]:       9226 :               || next->unit_type == DW_UT_split_type)
     114                 :         16 :             *subdie = SUBDIE(next);
     115         [ +  + ]:       9210 :           else if (next->unit_type == DW_UT_skeleton)
     116                 :            :             {
     117                 :         40 :               Dwarf_CU *split_cu = __libdw_find_split_unit (next);
     118         [ +  - ]:         40 :               if (split_cu != NULL)
     119                 :         40 :                 *subdie = CUDIE(split_cu);
     120                 :            :               else
     121                 :          0 :                 memset (subdie, '\0', sizeof (Dwarf_Die));
     122                 :            :             }
     123                 :            :           else
     124                 :       9170 :             memset (subdie, '\0', sizeof (Dwarf_Die));
     125                 :            :         }
     126                 :            :       else
     127                 :          0 :         memset (subdie, '\0', sizeof (Dwarf_Die));
     128                 :            :     }
     129                 :            : 
     130                 :            :   return 0;
     131                 :            : }