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) 2000-2011 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#if defined(VGO_linux)
52 STRNLEN(VG_Z_LIBC_SONAME, strnlen)
53#elif defined(VGO_darwin)
54 STRNLEN(VG_Z_LIBC_SONAME, strnlen)
55#endif
56
57
58// Note that this replacement often doesn't get used because gcc inlines
59// calls to strlen() with its own built-in version.  This can be very
60// confusing if you aren't expecting it.  Other small functions in this file
61// may also be inline by gcc.
62#define STRLEN(soname, fnname)                                          \
63   SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str );      \
64   SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str )       \
65   {                                                                    \
66      SizeT i = 0;                                                      \
67      while (str[i] != 0) i++;                                          \
68      return i;                                                         \
69   }
70
71#if defined(VGO_linux)
72 STRLEN(VG_Z_LIBC_SONAME,          strlen)
73 STRLEN(VG_Z_LD_LINUX_SO_2,        strlen)
74 STRLEN(VG_Z_LD_LINUX_X86_64_SO_2, strlen)
75#elif defined(VGO_darwin)
76 STRLEN(VG_Z_LIBC_SONAME,          strlen)
77#endif
78
79/*--------------------------------------------------------------------*/
80/*--- end                                                          ---*/
81/*--------------------------------------------------------------------*/
82