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_LIBC_SONAME, __GI_strlen)
130 STRLEN(VG_Z_LD_LINUX_SO_2, strlen)
131 STRLEN(VG_Z_LD_LINUX_X86_64_SO_2, strlen)
132 STRLEN(VG_Z_LD_SO_1, strlen)
136 #define STRCPY(soname, fnname) \
137 char* VG_REPLACE_FUNCTION_ZU(soname, fnname) ( char* dst, const char* src ); \
138 char* VG_REPLACE_FUNCTION_ZU(soname, fnname) ( char* dst, const char* src ) \
140 Char* dst_orig = dst; \
142 while (*src) *dst++ = *src++; \
148 STRCPY(VG_Z_LIBC_SONAME, strcpy)
149 #if defined(VGO_linux)
150 STRCPY(VG_Z_LIBC_SONAME, __GI_strcpy)
151 #elif defined(VGO_darwin)
152 STRCPY(VG_Z_DYLD, strcpy)
156 #define STRNCMP(soname, fnname) \
157 int VG_REPLACE_FUNCTION_ZU(soname,fnname) \
158 ( const char* s1, const char* s2, SizeT nmax ); \
159 int VG_REPLACE_FUNCTION_ZU(soname,fnname) \
160 ( const char* s1, const char* s2, SizeT nmax ) \
164 if (n >= nmax) return 0; \
165 if (*s1 == 0 && *s2 == 0) return 0; \
166 if (*s1 == 0) return -1; \
167 if (*s2 == 0) return 1; \
169 if (*(unsigned char*)s1 < *(unsigned char*)s2) return -1; \
170 if (*(unsigned char*)s1 > *(unsigned char*)s2) return 1; \
176 STRNCMP(VG_Z_LIBC_SONAME, strncmp)
177 #if defined(VGO_linux)
178 STRNCMP(VG_Z_LIBC_SONAME, __GI_strncmp)
179 #elif defined(VGO_darwin)
180 STRNCMP(VG_Z_DYLD, strncmp)
184 #define STRCMP(soname, fnname) \
185 int VG_REPLACE_FUNCTION_ZU(soname,fnname) \
186 ( const char* s1, const char* s2 ); \
187 int VG_REPLACE_FUNCTION_ZU(soname,fnname) \
188 ( const char* s1, const char* s2 ) \
190 register unsigned char c1; \
191 register unsigned char c2; \
193 c1 = *(unsigned char *)s1; \
194 c2 = *(unsigned char *)s2; \
195 if (c1 != c2) break; \
196 if (c1 == 0) break; \
199 if ((unsigned char)c1 < (unsigned char)c2) return -1; \
200 if ((unsigned char)c1 > (unsigned char)c2) return 1; \
204 STRCMP(VG_Z_LIBC_SONAME, strcmp)
205 #if defined(VGO_linux)
206 STRCMP(VG_Z_LIBC_SONAME, __GI_strcmp)
207 STRCMP(VG_Z_LD_LINUX_X86_64_SO_2, strcmp)
208 STRCMP(VG_Z_LD64_SO_1, strcmp)
212 #define MEMCHR(soname, fnname) \
213 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const void *s, int c, SizeT n); \
214 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const void *s, int c, SizeT n) \
217 UChar c0 = (UChar)c; \
218 UChar* p = (UChar*)s; \
219 for (i = 0; i < n; i++) \
220 if (p[i] == c0) return (void*)(&p[i]); \
224 MEMCHR(VG_Z_LIBC_SONAME, memchr)
225 #if defined(VGO_darwin)
226 MEMCHR(VG_Z_DYLD, memchr)
230 #define MEMCPY(soname, fnname) \
231 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
232 ( void *dst, const void *src, SizeT sz ); \
233 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
234 ( void *dest, const void *src, SizeT sz ) \
236 const UChar* s = (const UChar*)src; \
237 UChar* d = (UChar*)dest; \
238 const UWord* sW = (const UWord*)src; \
239 UWord* dW = (UWord*)dest; \
240 const UWord al = sizeof(UWord)-1; \
242 if (0 == (((UWord)dW) & al) && 0 == (((UWord)sW) & al)) { \
243 while (sz >= 4 * sizeof(UWord)) { \
248 sz -= 4 * sizeof(UWord); \
254 while (sz >= 1 * sizeof(UWord)) { \
256 sz -= 1 * sizeof(UWord); \
262 s = (const UChar*)sW; \
272 MEMCPY(VG_Z_LIBC_SONAME, memcpy)
273 #if defined(VGO_linux)
274 MEMCPY(VG_Z_LD_SO_1, memcpy) /* ld.so.1 */
275 MEMCPY(VG_Z_LD64_SO_1, memcpy) /* ld64.so.1 */
279 /* Copy SRC to DEST, returning the address of the terminating '\0' in
280 DEST. (minor variant of strcpy) */
281 #define STPCPY(soname, fnname) \
282 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( char* dst, const char* src ); \
283 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( char* dst, const char* src ) \
285 while (*src) *dst++ = *src++; \
291 STPCPY(VG_Z_LIBC_SONAME, stpcpy)
292 #if defined(VGO_linux)
293 STPCPY(VG_Z_LD_LINUX_SO_2, stpcpy)
294 STPCPY(VG_Z_LD_LINUX_X86_64_SO_2, stpcpy)
298 /* Find the first occurrence of C in S. */
299 #define GLIBC232_RAWMEMCHR(soname, fnname) \
300 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const char* s, int c_in); \
301 char* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const char* s, int c_in) \
303 unsigned char c = (unsigned char) c_in; \
304 unsigned char* char_ptr = (unsigned char *)s; \
306 if (*char_ptr == c) return char_ptr; \
311 GLIBC232_RAWMEMCHR(VG_Z_LIBC_SONAME, rawmemchr)
312 #if defined (VGO_linux)
313 GLIBC232_RAWMEMCHR(VG_Z_LIBC_SONAME, __GI___rawmemchr)
317 #define STRSTR(soname, fnname) \
318 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
319 (void* haystack, void* needle); \
320 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
321 (void* haystack, void* needle) \
323 UChar* h = (UChar*)haystack; \
324 UChar* n = (UChar*)needle; \
326 /* find the length of n, not including terminating zero */ \
328 while (n[nlen]) nlen++; \
330 /* if n is the empty string, match immediately. */ \
331 if (nlen == 0) return h; \
333 /* assert(nlen >= 1); */ \
338 if (hh == 0) return NULL; \
339 if (hh != n0) { h++; continue; } \
342 for (i = 0; i < nlen; i++) { \
346 /* assert(i >= 0 && i <= nlen); */ \
354 #if defined(VGO_linux)
355 STRSTR(VG_Z_LIBC_SONAME, strstr)
359 #define STRPBRK(soname, fnname) \
360 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
361 (void* sV, void* acceptV); \
362 void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
363 (void* sV, void* acceptV) \
365 UChar* s = (UChar*)sV; \
366 UChar* accept = (UChar*)acceptV; \
368 /* find the length of 'accept', not including terminating zero */ \
370 while (accept[nacc]) nacc++; \
372 /* if n is the empty string, fail immediately. */ \
373 if (nacc == 0) return NULL; \
375 /* assert(nacc >= 1); */ \
381 for (i = 0; i < nacc; i++) { \
382 if (sc == accept[i]) \
391 #if defined(VGO_linux)
392 STRPBRK(VG_Z_LIBC_SONAME, strpbrk)
396 /*--------------------------------------------------------------------*/
397 /*--- end pc_intercepts.c ---*/
398 /*--------------------------------------------------------------------*/