LCOV - code coverage report
Current view: top level - elfutils/libelf - elf_getscn.c (source / functions) Hit Total Coverage
Test: lcov.out Lines: 14 17 82.4 %
Date: 2013-03-08 Functions: 1 1 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 7 10 70.0 %

           Branch data     Line data    Source code
       1                 :            : /* Get section at specific index.
       2                 :            :    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
       5                 :            : 
       6                 :            :    This file is free software; you can redistribute it and/or modify
       7                 :            :    it under the terms of either
       8                 :            : 
       9                 :            :      * the GNU Lesser General Public License as published by the Free
      10                 :            :        Software Foundation; either version 3 of the License, or (at
      11                 :            :        your option) any later version
      12                 :            : 
      13                 :            :    or
      14                 :            : 
      15                 :            :      * the GNU General Public License as published by the Free
      16                 :            :        Software Foundation; either version 2 of the License, or (at
      17                 :            :        your option) any later version
      18                 :            : 
      19                 :            :    or both in parallel, as here.
      20                 :            : 
      21                 :            :    elfutils is distributed in the hope that it will be useful, but
      22                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24                 :            :    General Public License for more details.
      25                 :            : 
      26                 :            :    You should have received copies of the GNU General Public License and
      27                 :            :    the GNU Lesser General Public License along with this program.  If
      28                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      29                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include <config.h>
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include <assert.h>
      35                 :            : #include <stddef.h>
      36                 :            : #include <stdlib.h>
      37                 :            : 
      38                 :            : #include "libelfP.h"
      39                 :            : 
      40                 :            : 
      41                 :            : Elf_Scn *
      42                 :  382795325 : elf_getscn (elf, idx)
      43                 :            :      Elf *elf;
      44                 :            :      size_t idx;
      45                 :            : {
      46         [ +  - ]:  382795325 :   if (elf == NULL)
      47                 :            :     return NULL;
      48                 :            : 
      49         [ -  + ]:  382795325 :   if (unlikely (elf->kind != ELF_K_ELF))
      50                 :            :     {
      51                 :          0 :       __libelf_seterrno (ELF_E_INVALID_HANDLE);
      52                 :          0 :       return NULL;
      53                 :            :     }
      54                 :            : 
      55                 :            :   rwlock_rdlock (elf->lock);
      56                 :            : 
      57                 :  382795325 :   Elf_Scn *result = NULL;
      58                 :            : 
      59                 :            :   /* Find the section in the list.  */
      60                 :  382795325 :   Elf_ScnList *runp = (elf->class == ELFCLASS32
      61                 :            :                        || (offsetof (struct Elf, state.elf32.scns)
      62                 :            :                            == offsetof (struct Elf, state.elf64.scns))
      63                 :            :                        ? &elf->state.elf32.scns : &elf->state.elf64.scns);
      64                 :            :   while (1)
      65                 :            :     {
      66         [ +  + ]:  382795856 :       if (idx < runp->max)
      67                 :            :         {
      68         [ +  - ]:  382795319 :           if (idx < runp->cnt)
      69                 :  382795319 :             result = &runp->data[idx];
      70                 :            :           else
      71                 :          0 :             __libelf_seterrno (ELF_E_INVALID_INDEX);
      72                 :            :           break;
      73                 :            :         }
      74                 :            : 
      75                 :        537 :       idx -= runp->max;
      76                 :            : 
      77                 :        537 :       runp = runp->next;
      78         [ +  + ]:        537 :       if (runp == NULL)
      79                 :            :         {
      80                 :          6 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
      81                 :          6 :           break;
      82                 :            :         }
      83                 :            :     }
      84                 :            : 
      85                 :            :   rwlock_unlock (elf->lock);
      86                 :            : 
      87                 :  382795325 :   return result;
      88                 :            : }
      89                 :            : INTDEF(elf_getscn)

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