2 /*--------------------------------------------------------------------*/
3 /*--- Ptrcheck: a pointer-use checker. pc_intercepts.c ---*/
4 /*--------------------------------------------------------------------*/
7 This file is part of Ptrcheck, a Valgrind tool for checking pointer
10 Copyright (C) 2003-2010 Nicholas Nethercote
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License as
15 published by the Free Software Foundation; either version 2 of the
16 License, or (at your option) any later version.
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 The GNU General Public License is contained in the file COPYING.
31 /* Nothing actually in here. However it appears this file is needed
32 to make malloc intercepting work. (jrs, 2 july 08 -- not sure about
36 #include "pub_tool_basics.h"
37 #include "pub_tool_hashtable.h"
38 #include "pub_tool_redir.h"
39 #include "pub_tool_tooliface.h"
43 /* The following intercepts are copied verbatim from
44 memcheck/mc_replace_strmem.c. If you copy more in, please keep
45 them in the same order as in mc_replace_strmem.c. */
48 #define STRRCHR(soname, fnname) \
49 char* VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* s, int c ); \
50 char* VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* s, int c ) \
52 UChar ch = (UChar)((UInt)c); \
53 UChar* p = (UChar*)s; \
56 if (*p == ch) last = p; \
57 if (*p == 0) return last; \
62 // Apparently rindex() is the same thing as strrchr()
63 STRRCHR(VG_Z_LIBC_SONAME, strrchr)
64 STRRCHR(VG_Z_LIBC_SONAME, rindex)
65 #if defined(VGO_linux)
66 STRRCHR(VG_Z_LIBC_SONAME, __GI_strrchr)
67 STRRCHR(VG_Z_LD_LINUX_SO_2, rindex)
68 #elif defined(VGO_darwin)
69 STRRCHR(VG_Z_DYLD, strrchr)
70 STRRCHR(VG_Z_DYLD, rindex)
74 #define STRCHR(soname, fnname) \
75 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* s, int c ); \
76 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* s, int c ) \
78 UChar ch = (UChar)((UInt)c); \
79 UChar* p = (UChar*)s; \
81 if (*p == ch) return p; \
82 if (*p == 0) return NULL; \
87 // Apparently index() is the same thing as strchr()
88 STRCHR(VG_Z_LIBC_SONAME, strchr)
89 STRCHR(VG_Z_LIBC_SONAME, index)
90 #if defined(VGO_linux)
91 STRCHR(VG_Z_LIBC_SONAME, __GI_strchr)
92 STRCHR(VG_Z_LD_LINUX_SO_2, strchr)
93 STRCHR(VG_Z_LD_LINUX_SO_2, index)
94 STRCHR(VG_Z_LD_LINUX_X86_64_SO_2, strchr)
95 STRCHR(VG_Z_LD_LINUX_X86_64_SO_2, index)
96 #elif defined(VGO_darwin)
97 STRCHR(VG_Z_DYLD, strchr)
98 STRCHR(VG_Z_DYLD, index)
102 #define STRNLEN(soname, fnname) \
103 SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* str, SizeT n ); \
104 SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* str, SizeT n ) \
107 while (i < n && str[i] != 0) i++; \
111 STRNLEN(VG_Z_LIBC_SONAME, strnlen)
114 // Note that this replacement often doesn't get used because gcc inlines
115 // calls to strlen() with its own built-in version. This can be very
116 // confusing if you aren't expecting it. Other small functions in this file
117 // may also be inline by gcc.
118 #define STRLEN(soname, fnname) \
119 SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str ); \
120 SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str ) \
123 while (str[i] != 0) i++; \
127 STRLEN(VG_Z_LIBC_SONAME, strlen)
128 #if defined(VGO_linux)
129 STRLEN(VG_Z_LD_LINUX_SO_2, strlen)
130 STRLEN(VG_Z_LD_LINUX_X86_64_SO_2, strlen)
131 STRLEN(VG_Z_LD_SO_1, strlen)
135 #define STRCMP(soname, fnname) \
136 int VG_REPLACE_FUNCTION_ZU(soname,fnname) \
137 ( const char* s1, const char* s2 ); \
138 int VG_REPLACE_FUNCTION_ZU(soname,fnname) \
139 ( const char* s1, const char* s2 ) \
141 register unsigned char c1; \
142 register unsigned char c2; \
144 c1 = *(unsigned char *)s1; \
145 c2 = *(unsigned char *)s2; \
146 if (c1 != c2) break; \
147 if (c1 == 0) break; \
150 if ((unsigned char)c1 < (unsigned char)c2) return -1; \
151 if ((unsigned char)c1 > (unsigned char)c2) return 1; \
155 STRCMP(VG_Z_LIBC_SONAME, strcmp)
156 #if defined(VGO_linux)
157 STRCMP(VG_Z_LD_LINUX_X86_64_SO_2, strcmp)
158 STRCMP(VG_Z_LD64_SO_1, strcmp)
162 #define MEMCHR(soname, fnname) \
163 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const void *s, int c, SizeT n); \
164 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const void *s, int c, SizeT n) \
167 UChar c0 = (UChar)c; \
168 UChar* p = (UChar*)s; \
169 for (i = 0; i < n; i++) \
170 if (p[i] == c0) return (void*)(&p[i]); \
174 MEMCHR(VG_Z_LIBC_SONAME, memchr)
175 #if defined(VGO_darwin)
176 MEMCHR(VG_Z_DYLD, memchr)
180 #define MEMCPY(soname, fnname) \
181 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
182 ( void *dst, const void *src, SizeT sz ); \
183 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
184 ( void *dest, const void *src, SizeT sz ) \
186 const UChar* s = (const UChar*)src; \
187 UChar* d = (UChar*)dest; \
188 const UWord* sW = (const UWord*)src; \
189 UWord* dW = (UWord*)dest; \
190 const UWord al = sizeof(UWord)-1; \
192 if (0 == (((UWord)dW) & al) && 0 == (((UWord)sW) & al)) { \
193 while (sz >= 4 * sizeof(UWord)) { \
198 sz -= 4 * sizeof(UWord); \
204 while (sz >= 1 * sizeof(UWord)) { \
206 sz -= 1 * sizeof(UWord); \
212 s = (const UChar*)sW; \
222 MEMCPY(VG_Z_LIBC_SONAME, memcpy)
223 #if defined(VGO_linux)
224 MEMCPY(VG_Z_LD_SO_1, memcpy) /* ld.so.1 */
225 MEMCPY(VG_Z_LD64_SO_1, memcpy) /* ld64.so.1 */
229 /* Copy SRC to DEST, returning the address of the terminating '\0' in
230 DEST. (minor variant of strcpy) */
231 #define STPCPY(soname, fnname) \
232 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( char* dst, const char* src ); \
233 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( char* dst, const char* src ) \
235 while (*src) *dst++ = *src++; \
241 STPCPY(VG_Z_LIBC_SONAME, stpcpy)
242 #if defined(VGO_linux)
243 STPCPY(VG_Z_LD_LINUX_SO_2, stpcpy)
244 STPCPY(VG_Z_LD_LINUX_X86_64_SO_2, stpcpy)
248 /* Find the first occurrence of C in S. */
249 #define GLIBC232_RAWMEMCHR(soname, fnname) \
250 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const char* s, int c_in); \
251 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const char* s, int c_in) \
253 unsigned char c = (unsigned char) c_in; \
254 unsigned char* char_ptr = (unsigned char *)s; \
256 if (*char_ptr == c) return char_ptr; \
261 GLIBC232_RAWMEMCHR(VG_Z_LIBC_SONAME, rawmemchr)
262 #if defined (VGO_linux)
263 GLIBC232_RAWMEMCHR(VG_Z_LIBC_SONAME, __GI___rawmemchr)
267 /*--------------------------------------------------------------------*/
268 /*--- end pc_intercepts.c ---*/
269 /*--------------------------------------------------------------------*/