LCOV - code coverage report
Current view: top level - libelf - elf32_getehdr.c (source / functions) Hit Total Coverage
Test: elfutils-0.189 Lines: 16 26 61.5 %
Date: 2023-10-03 16:45:27 Functions: 4 5 80.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 5 12 41.7 %

           Branch data     Line data    Source code
       1                 :            : /* Get ELF header.
       2                 :            :    Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Written 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 <libelf.h>
      35                 :            : #include <stddef.h>
      36                 :            : 
      37                 :            : #include "libelfP.h"
      38                 :            : 
      39                 :            : #ifndef LIBELFBITS
      40                 :            : # define LIBELFBITS 32
      41                 :            : #endif
      42                 :            : 
      43                 :            : 
      44                 :            : static ElfW2(LIBELFBITS,Ehdr) *
      45                 :       1412 : getehdr_impl (Elf *elf, int wrlock)
      46                 :            : {
      47         [ -  + ]:       1412 :   if (elf == NULL)
      48                 :            :     return NULL;
      49                 :            : 
      50         [ -  + ]:       1412 :   if (unlikely (elf->kind != ELF_K_ELF))
      51                 :            :     {
      52                 :          0 :       __libelf_seterrno (ELF_E_INVALID_HANDLE);
      53                 :          0 :       return NULL;
      54                 :            :     }
      55                 :            : 
      56                 :       1412 :  again:
      57         [ -  + ]:       1412 :   if (elf->class == 0)
      58                 :            :     {
      59         [ #  # ]:          0 :       if (!wrlock)
      60                 :            :         {
      61                 :          0 :           rwlock_unlock (elf->lock);
      62                 :          0 :           rwlock_wrlock (elf->lock);
      63                 :          0 :           wrlock = 1;
      64                 :          0 :           goto again;
      65                 :            :         }
      66                 :          0 :       elf->class = ELFW(ELFCLASS,LIBELFBITS);
      67                 :            :     }
      68         [ -  + ]:       1412 :   else if (unlikely (elf->class != ELFW(ELFCLASS,LIBELFBITS)))
      69                 :            :     {
      70                 :          0 :       __libelf_seterrno (ELF_E_INVALID_CLASS);
      71                 :          0 :       return NULL;
      72                 :            :     }
      73                 :            : 
      74                 :       1412 :   return elf->state.ELFW(elf,LIBELFBITS).ehdr;
      75                 :            : }
      76                 :            : 
      77                 :            : ElfW2(LIBELFBITS,Ehdr) *
      78                 :            : internal_function
      79                 :       1400 : __elfw2(LIBELFBITS,getehdr_wrlock) (Elf *elf)
      80                 :            : {
      81                 :       1400 :   return getehdr_impl (elf, 1);
      82                 :            : }
      83                 :            : 
      84                 :            : ElfW2(LIBELFBITS,Ehdr) *
      85                 :         12 : elfw2(LIBELFBITS,getehdr) (Elf *elf)
      86                 :            : {
      87                 :         12 :   ElfW2(LIBELFBITS,Ehdr) *result;
      88         [ +  - ]:         12 :   if (elf == NULL)
      89                 :            :     return NULL;
      90                 :            : 
      91                 :         12 :   rwlock_rdlock (elf->lock);
      92                 :         12 :   result = getehdr_impl (elf, 0);
      93                 :         12 :   rwlock_unlock (elf->lock);
      94                 :            : 
      95                 :         12 :   return result;
      96                 :            : }

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