l4/pkg/valgrind/src/valgrind-3.6.0-svn/drd/drd_strmem_intercepts.c

   1 /* -*- mode: C; c-basic-offset: 3; indent-tabs-mode: nil; -*- */
   2
   3 /*--------------------------------------------------------------------*/
   4 /*--- Replacements for strlen() and strnlen(), which run on the    ---*/
   5 /*--- simulated CPU.                                               ---*/
   6 /*--------------------------------------------------------------------*/
   7
   8 /*
   9   This file is part of DRD, a heavyweight Valgrind tool for
  10   detecting threading errors. The code below has been extracted
  11   from memchec/mc_replace_strmem.c, which has the following copyright
  12   notice:
  13
  14   Copyright (C) 2000-2010 Julian Seward
  15   jseward@acm.org
  16
  17   This program is free software; you can redistribute it and/or
  18   modify it under the terms of the GNU General Public License as
  19   published by the Free Software Foundation; either version 2 of the
  20   License, or (at your option) any later version.
  21
  22   This program is distributed in the hope that it will be useful, but
  23   WITHOUT ANY WARRANTY; without even the implied warranty of
  24   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25   General Public License for more details.
  26
  27   You should have received a copy of the GNU General Public License
  28   along with this program; if not, write to the Free Software
  29   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  30   02111-1307, USA.
  31
  32   The GNU General Public License is contained in the file COPYING.
  33 */
  34
  35 #include "pub_tool_basics.h"
  36 #include "pub_tool_hashtable.h"
  37 #include "pub_tool_redir.h"
  38 #include "pub_tool_tooliface.h"
  39 #include "valgrind.h"
  40
  41
  42 #define STRNLEN(soname, fnname)                                         \
  43    SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* str, SizeT n ); \
  44    SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* str, SizeT n ) \
  45    {                                                                    \
  46       SizeT i = 0;                                                      \
  47       while (i < n && str[i] != 0) i++;                                 \
  48       return i;                                                         \
  49    }
  50
  51 STRNLEN(VG_Z_LIBC_SONAME, strnlen)
  52
  53
  54 // Note that this replacement often doesn't get used because gcc inlines
  55 // calls to strlen() with its own built-in version.  This can be very
  56 // confusing if you aren't expecting it.  Other small functions in this file
  57 // may also be inline by gcc.
  58 #define STRLEN(soname, fnname)                                          \
  59    SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str );      \
  60    SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str )       \
  61    {                                                                    \
  62       SizeT i = 0;                                                      \
  63       while (str[i] != 0) i++;                                          \
  64       return i;                                                         \
  65    }
  66
  67 STRLEN(VG_Z_LIBC_SONAME,          strlen)
  68 #if defined(VGO_linux)
  69 STRLEN(VG_Z_LD_LINUX_SO_2,        strlen)
  70 STRLEN(VG_Z_LD_LINUX_X86_64_SO_2, strlen)
  71 #endif
  72
  73 /*--------------------------------------------------------------------*/
  74 /*--- end                                                          ---*/
  75 /*--------------------------------------------------------------------*/