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drd: Add strrchr(), memchr(), memrchr() and memcmp() intercepts (#326623)

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git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13696
This commit is contained in:
Bart Van Assche 2013-10-25 12:08:36 +00:00
parent 1b09dba092
commit 635f963b8c
1 changed files with 124 additions and 0 deletions
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124
drd/drd_strmem_intercepts.c
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@ -37,6 +37,40 @@
#include "pub_tool_clreq.h"
/*---------------------- strrchr ----------------------*/
#define STRRCHR(soname, fnname) \
char* VG_REPLACE_FUNCTION_EZU(20010,soname,fnname)( const char* s, int c ); \
char* VG_REPLACE_FUNCTION_EZU(20010,soname,fnname)( const char* s, int c ) \
{ \
HChar ch = (HChar)c; \
const HChar* p = s; \
const HChar* last = NULL; \
while (True) { \
if (*p == ch) last = p; \
if (*p == 0) return (HChar *)last; \
p++; \
} \
}
// Apparently rindex() is the same thing as strrchr()
#if defined(VGO_linux)
STRRCHR(VG_Z_LIBC_SONAME, strrchr)
STRRCHR(VG_Z_LIBC_SONAME, rindex)
STRRCHR(VG_Z_LIBC_SONAME, __GI_strrchr)
STRRCHR(VG_Z_LD_LINUX_SO_2, rindex)
#if defined(VGPV_arm_linux_android) || defined(VGPV_x86_linux_android)
STRRCHR(NONE, __dl_strrchr); /* in /system/bin/linker */
#endif
#elif defined(VGO_darwin)
//STRRCHR(VG_Z_LIBC_SONAME, strrchr)
//STRRCHR(VG_Z_LIBC_SONAME, rindex)
//STRRCHR(VG_Z_DYLD, strrchr)
//STRRCHR(VG_Z_DYLD, rindex)
STRRCHR(VG_Z_LIBC_SONAME, strrchr)
#endif
/*---------------------- strchr ----------------------*/
#define STRCHR(soname, fnname) \
@ -162,6 +196,55 @@
#endif
/*---------------------- memchr ----------------------*/
#define MEMCHR(soname, fnname) \
void* VG_REPLACE_FUNCTION_EZU(20170,soname,fnname) \
(const void *s, int c, SizeT n); \
void* VG_REPLACE_FUNCTION_EZU(20170,soname,fnname) \
(const void *s, int c, SizeT n) \
{ \
SizeT i; \
UChar c0 = (UChar)c; \
UChar* p = (UChar*)s; \
for (i = 0; i < n; i++) \
if (p[i] == c0) return (void*)(&p[i]); \
return NULL; \
}
#if defined(VGO_linux)
MEMCHR(VG_Z_LIBC_SONAME, memchr)
MEMCHR(VG_Z_LIBC_SONAME, __GI_memchr)
#elif defined(VGO_darwin)
//MEMCHR(VG_Z_LIBC_SONAME, memchr)
//MEMCHR(VG_Z_DYLD, memchr)
#endif
/*---------------------- memrchr ----------------------*/
#define MEMRCHR(soname, fnname) \
void* VG_REPLACE_FUNCTION_EZU(20360,soname,fnname) \
(const void *s, int c, SizeT n); \
void* VG_REPLACE_FUNCTION_EZU(20360,soname,fnname) \
(const void *s, int c, SizeT n) \
{ \
SizeT i; \
UChar c0 = (UChar)c; \
UChar* p = (UChar*)s; \
for (i = 0; i < n; i++) \
if (p[n-1-i] == c0) return (void*)(&p[n-1-i]); \
return NULL; \
}
#if defined(VGO_linux)
MEMRCHR(VG_Z_LIBC_SONAME, memrchr)
#elif defined(VGO_darwin)
//MEMRCHR(VG_Z_LIBC_SONAME, memrchr)
//MEMRCHR(VG_Z_DYLD, memrchr)
#endif
/*---------------------- memcpy ----------------------*/
#define MEMCPY(soname, fnname) \
@ -236,6 +319,7 @@
#if defined(VGO_linux)
MEMCPY(VG_Z_LIBC_SONAME, memcpy)
MEMCPY(VG_Z_LIBC_SONAME, __GI_memcpy)
MEMCPY(VG_Z_LD_SO_1, memcpy) /* ld.so.1 */
MEMCPY(VG_Z_LD64_SO_1, memcpy) /* ld64.so.1 */
/* icc9 blats these around all over the place. Not only in the main
@ -258,6 +342,46 @@
#endif
/*---------------------- memcmp ----------------------*/
#define MEMCMP(soname, fnname) \
int VG_REPLACE_FUNCTION_EZU(20190,soname,fnname) \
(const void *s1V, const void *s2V, SizeT n); \
int VG_REPLACE_FUNCTION_EZU(20190,soname,fnname) \
(const void *s1V, const void *s2V, SizeT n) \
{ \
int res; \
UChar a0; \
UChar b0; \
const UChar* s1 = s1V; \
const UChar* s2 = s2V; \
\
while (n != 0) { \
a0 = s1[0]; \
b0 = s2[0]; \
s1 += 1; \
s2 += 1; \
res = ((int)a0) - ((int)b0); \
if (res != 0) \
return res; \
n -= 1; \
} \
return 0; \
}
#if defined(VGO_linux)
MEMCMP(VG_Z_LIBC_SONAME, memcmp)
MEMCMP(VG_Z_LIBC_SONAME, __GI_memcmp)
MEMCMP(VG_Z_LIBC_SONAME, bcmp)
MEMCMP(VG_Z_LD_SO_1, bcmp)
#elif defined(VGO_darwin)
//MEMCMP(VG_Z_LIBC_SONAME, memcmp)
//MEMCMP(VG_Z_LIBC_SONAME, bcmp)
//MEMCMP(VG_Z_DYLD, memcmp)
//MEMCMP(VG_Z_DYLD, bcmp)
#endif
/*---------------------- stpcpy ----------------------*/
/* Copy SRC to DEST, returning the address of the terminating '\0' in