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       1                 :             : /* Return function name in line.
       2                 :             :    This file is part of elfutils.
       3                 :             :    Written by John Mellor-Crummey <johnmc@rice.edu>, 2021.
       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 <string.h>
      34                 :             : #include "libdwP.h"
      35                 :             : 
      36                 :             : 
      37                 :             : const char *
      38                 :          26 : dwarf_linefunctionname (Dwarf *dbg, Dwarf_Line *line)
      39                 :             : {
      40         [ +  - ]:          26 :   if (dbg == NULL || line == NULL)
      41                 :             :     return NULL;
      42         [ +  - ]:          26 :   if (line->context == 0)
      43                 :             :     return NULL;
      44                 :             : 
      45                 :          26 :   Elf_Data *str_data = dbg->sectiondata[IDX_debug_str];
      46   [ +  -  +  - ]:          26 :   if (str_data == NULL || line->function_name >= str_data->d_size
      47         [ -  + ]:          26 :       || memchr (str_data->d_buf + line->function_name, '\0',
      48                 :             :                  str_data->d_size - line->function_name) == NULL)
      49                 :           0 :     return NULL;
      50                 :             : 
      51                 :             :   return (char *) str_data->d_buf + line->function_name;
      52                 :             : }