LCOV - code coverage report
Current view: top level - libdw - dwarf_get_units.c (source / functions) Coverage Total Hit
Test: elfutils-0.193 Lines: 87.2 % 39 34
Test Date: 2025-08-30 14:31:09 Functions: 100.0 % 1 1
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
Branches: 81.6 % 38 31

             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                 :       21360 : 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         [ +  - ]:       21360 :   if (dwarf == NULL)
      45                 :             :     return -1;
      46                 :             : 
      47                 :       21360 :   Dwarf_Off off;
      48                 :       21360 :   bool v4type;
      49         [ +  + ]:       21360 :   if (cu == NULL)
      50                 :             :     {
      51                 :             :       off = 0;
      52                 :             :       v4type = false;
      53                 :             :     }
      54                 :             :   else
      55                 :             :     {
      56                 :       16264 :       off = cu->end;
      57                 :       16264 :       v4type = cu->sec_idx != IDX_debug_info;
      58                 :             : 
      59                 :             :       /* Make sure we got a real (not fake) CU.  */
      60         [ -  + ]:       16264 :       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         [ +  + ]:       16264 :       if (! v4type)
      68                 :             :         {
      69         [ +  + ]:       16232 :           if (off >= cu->dbg->sectiondata[IDX_debug_info]->d_size)
      70                 :             :             {
      71         [ +  + ]:         532 :               if (cu->dbg->sectiondata[IDX_debug_types] == NULL)
      72                 :             :                 return 1;
      73                 :             : 
      74                 :             :               off = 0;
      75                 :             :               v4type = true;
      76                 :             :             }
      77                 :             :         }
      78                 :             :       else
      79         [ +  + ]:          32 :         if (off >= cu->dbg->sectiondata[IDX_debug_types]->d_size)
      80                 :             :           return 1;
      81                 :             :     }
      82                 :             : 
      83                 :       20830 :   *next_cu = __libdw_findcu (dwarf, off, v4type);
      84         [ +  + ]:       20830 :   if (*next_cu == NULL)
      85                 :             :     return -1;
      86                 :             : 
      87                 :       20812 :   Dwarf_CU *next = (*next_cu);
      88                 :             : 
      89         [ +  + ]:       20812 :   if (version != NULL)
      90                 :        6194 :     *version = next->version;
      91                 :             : 
      92         [ +  + ]:       20812 :   if (unit_type != NULL)
      93                 :       13580 :     *unit_type = next->unit_type;
      94                 :             : 
      95         [ +  + ]:       20812 :   if (cudie != NULL)
      96                 :             :     {
      97         [ +  - ]:       11232 :       if (next->version >= 2 && next->version <= 5
      98         [ +  - ]:       11232 :           && next->unit_type >= DW_UT_compile
      99         [ +  - ]:       11232 :           && next->unit_type <= DW_UT_split_type)
     100                 :       11232 :         *cudie = CUDIE (next);
     101                 :             :       else
     102                 :           0 :         memset (cudie, '\0', sizeof (Dwarf_Die));
     103                 :             :     }
     104                 :             : 
     105         [ +  + ]:       20812 :   if (subdie != NULL)
     106                 :             :     {
     107         [ +  - ]:        9816 :       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                 :        9816 :           if (next->unit_type == DW_UT_type
     113         [ +  + ]:        9816 :               || next->unit_type == DW_UT_split_type)
     114                 :          16 :             *subdie = SUBDIE(next);
     115         [ +  + ]:        9800 :           else if (next->unit_type == DW_UT_skeleton)
     116                 :             :             {
     117                 :         102 :               Dwarf_CU *split_cu = __libdw_find_split_unit (next);
     118         [ +  - ]:         102 :               if (split_cu != NULL)
     119                 :         102 :                 *subdie = CUDIE(split_cu);
     120                 :             :               else
     121                 :           0 :                 memset (subdie, '\0', sizeof (Dwarf_Die));
     122                 :             :             }
     123                 :             :           else
     124                 :        9698 :             memset (subdie, '\0', sizeof (Dwarf_Die));
     125                 :             :         }
     126                 :             :       else
     127                 :           0 :         memset (subdie, '\0', sizeof (Dwarf_Die));
     128                 :             :     }
     129                 :             : 
     130                 :             :   return 0;
     131                 :             : }
     132                 :             : INTDEF(dwarf_get_units)
        

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