| |
| /*--------------------------------------------------------------------*/ |
| /*--- Ptrcheck: a pointer-use checker. pc_intercepts.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Ptrcheck, a Valgrind tool for checking pointer |
| use in programs. |
| |
| Copyright (C) 2003-2011 Nicholas Nethercote |
| njn@valgrind.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| /* Nothing actually in here. However it appears this file is needed |
| to make malloc intercepting work. (jrs, 2 july 08 -- not sure about |
| that). |
| */ |
| |
| #include "pub_tool_basics.h" |
| #include "pub_tool_hashtable.h" |
| #include "pub_tool_redir.h" |
| #include "pub_tool_tooliface.h" |
| #include "valgrind.h" |
| |
| |
| /* The following intercepts are copied verbatim from |
| memcheck/mc_replace_strmem.c. If you copy more in, please keep |
| them in the same order as in mc_replace_strmem.c. */ |
| |
| |
| #define STRRCHR(soname, fnname) \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* s, int c ); \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* s, int c ) \ |
| { \ |
| UChar ch = (UChar)((UInt)c); \ |
| UChar* p = (UChar*)s; \ |
| UChar* last = NULL; \ |
| while (True) { \ |
| if (*p == ch) last = p; \ |
| if (*p == 0) return last; \ |
| p++; \ |
| } \ |
| } |
| |
| // Apparently rindex() is the same thing as strrchr() |
| STRRCHR(VG_Z_LIBC_SONAME, strrchr) |
| STRRCHR(VG_Z_LIBC_SONAME, rindex) |
| #if defined(VGO_linux) |
| STRRCHR(VG_Z_LIBC_SONAME, __GI_strrchr) |
| STRRCHR(VG_Z_LD_LINUX_SO_2, rindex) |
| #elif defined(VGO_darwin) |
| STRRCHR(VG_Z_DYLD, strrchr) |
| STRRCHR(VG_Z_DYLD, rindex) |
| #endif |
| |
| |
| #define STRCHR(soname, fnname) \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* s, int c ); \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* s, int c ) \ |
| { \ |
| UChar ch = (UChar)((UInt)c); \ |
| UChar* p = (UChar*)s; \ |
| while (True) { \ |
| if (*p == ch) return p; \ |
| if (*p == 0) return NULL; \ |
| p++; \ |
| } \ |
| } |
| |
| // Apparently index() is the same thing as strchr() |
| STRCHR(VG_Z_LIBC_SONAME, strchr) |
| STRCHR(VG_Z_LIBC_SONAME, index) |
| #if defined(VGO_linux) |
| STRCHR(VG_Z_LIBC_SONAME, __GI_strchr) |
| STRCHR(VG_Z_LD_LINUX_SO_2, strchr) |
| STRCHR(VG_Z_LD_LINUX_SO_2, index) |
| STRCHR(VG_Z_LD_LINUX_X86_64_SO_2, strchr) |
| STRCHR(VG_Z_LD_LINUX_X86_64_SO_2, index) |
| #elif defined(VGO_darwin) |
| STRCHR(VG_Z_DYLD, strchr) |
| STRCHR(VG_Z_DYLD, index) |
| #endif |
| |
| |
| #define STRNLEN(soname, fnname) \ |
| SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* str, SizeT n ); \ |
| SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname) ( const char* str, SizeT n ) \ |
| { \ |
| SizeT i = 0; \ |
| while (i < n && str[i] != 0) i++; \ |
| return i; \ |
| } |
| |
| STRNLEN(VG_Z_LIBC_SONAME, strnlen) |
| |
| |
| // Note that this replacement often doesn't get used because gcc inlines |
| // calls to strlen() with its own built-in version. This can be very |
| // confusing if you aren't expecting it. Other small functions in this file |
| // may also be inline by gcc. |
| #define STRLEN(soname, fnname) \ |
| SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str ); \ |
| SizeT VG_REPLACE_FUNCTION_ZU(soname,fnname)( const char* str ) \ |
| { \ |
| SizeT i = 0; \ |
| while (str[i] != 0) i++; \ |
| return i; \ |
| } |
| |
| STRLEN(VG_Z_LIBC_SONAME, strlen) |
| #if defined(VGO_linux) |
| STRLEN(VG_Z_LIBC_SONAME, __GI_strlen) |
| STRLEN(VG_Z_LD_LINUX_SO_2, strlen) |
| STRLEN(VG_Z_LD_LINUX_X86_64_SO_2, strlen) |
| STRLEN(VG_Z_LD_SO_1, strlen) |
| #endif |
| |
| |
| #define STRCPY(soname, fnname) \ |
| char* VG_REPLACE_FUNCTION_ZU(soname, fnname) ( char* dst, const char* src ); \ |
| char* VG_REPLACE_FUNCTION_ZU(soname, fnname) ( char* dst, const char* src ) \ |
| { \ |
| Char* dst_orig = dst; \ |
| \ |
| while (*src) *dst++ = *src++; \ |
| *dst = 0; \ |
| \ |
| return dst_orig; \ |
| } |
| |
| STRCPY(VG_Z_LIBC_SONAME, strcpy) |
| #if defined(VGO_linux) |
| STRCPY(VG_Z_LIBC_SONAME, __GI_strcpy) |
| #elif defined(VGO_darwin) |
| STRCPY(VG_Z_DYLD, strcpy) |
| #endif |
| |
| |
| #define STRNCMP(soname, fnname) \ |
| int VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| ( const char* s1, const char* s2, SizeT nmax ); \ |
| int VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| ( const char* s1, const char* s2, SizeT nmax ) \ |
| { \ |
| SizeT n = 0; \ |
| while (True) { \ |
| if (n >= nmax) return 0; \ |
| if (*s1 == 0 && *s2 == 0) return 0; \ |
| if (*s1 == 0) return -1; \ |
| if (*s2 == 0) return 1; \ |
| \ |
| if (*(unsigned char*)s1 < *(unsigned char*)s2) return -1; \ |
| if (*(unsigned char*)s1 > *(unsigned char*)s2) return 1; \ |
| \ |
| s1++; s2++; n++; \ |
| } \ |
| } |
| |
| STRNCMP(VG_Z_LIBC_SONAME, strncmp) |
| #if defined(VGO_linux) |
| STRNCMP(VG_Z_LIBC_SONAME, __GI_strncmp) |
| #elif defined(VGO_darwin) |
| STRNCMP(VG_Z_DYLD, strncmp) |
| #endif |
| |
| |
| #define STRCMP(soname, fnname) \ |
| int VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| ( const char* s1, const char* s2 ); \ |
| int VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| ( const char* s1, const char* s2 ) \ |
| { \ |
| register unsigned char c1; \ |
| register unsigned char c2; \ |
| while (True) { \ |
| c1 = *(unsigned char *)s1; \ |
| c2 = *(unsigned char *)s2; \ |
| if (c1 != c2) break; \ |
| if (c1 == 0) break; \ |
| s1++; s2++; \ |
| } \ |
| if ((unsigned char)c1 < (unsigned char)c2) return -1; \ |
| if ((unsigned char)c1 > (unsigned char)c2) return 1; \ |
| return 0; \ |
| } |
| |
| STRCMP(VG_Z_LIBC_SONAME, strcmp) |
| #if defined(VGO_linux) |
| STRCMP(VG_Z_LIBC_SONAME, __GI_strcmp) |
| STRCMP(VG_Z_LD_LINUX_X86_64_SO_2, strcmp) |
| STRCMP(VG_Z_LD64_SO_1, strcmp) |
| #endif |
| |
| |
| #define MEMCHR(soname, fnname) \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const void *s, int c, SizeT n); \ |
| void* VG_REPLACE_FUNCTION_ZU(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; \ |
| } |
| |
| MEMCHR(VG_Z_LIBC_SONAME, memchr) |
| #if defined(VGO_darwin) |
| MEMCHR(VG_Z_DYLD, memchr) |
| #endif |
| |
| |
| #define MEMCPY(soname, fnname) \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| ( void *dst, const void *src, SizeT sz ); \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| ( void *dest, const void *src, SizeT sz ) \ |
| { \ |
| const UChar* s = (const UChar*)src; \ |
| UChar* d = (UChar*)dest; \ |
| const UWord* sW = (const UWord*)src; \ |
| UWord* dW = (UWord*)dest; \ |
| const UWord al = sizeof(UWord)-1; \ |
| \ |
| if (0 == (((UWord)dW) & al) && 0 == (((UWord)sW) & al)) { \ |
| while (sz >= 4 * sizeof(UWord)) { \ |
| dW[0] = sW[0]; \ |
| dW[1] = sW[1]; \ |
| dW[2] = sW[2]; \ |
| dW[3] = sW[3]; \ |
| sz -= 4 * sizeof(UWord); \ |
| dW += 4; \ |
| sW += 4; \ |
| } \ |
| if (sz == 0) \ |
| return dest; \ |
| while (sz >= 1 * sizeof(UWord)) { \ |
| dW[0] = sW[0]; \ |
| sz -= 1 * sizeof(UWord); \ |
| dW += 1; \ |
| sW += 1; \ |
| } \ |
| if (sz == 0) \ |
| return dest; \ |
| s = (const UChar*)sW; \ |
| d = (UChar*)dW; \ |
| } \ |
| \ |
| while (sz--) \ |
| *d++ = *s++; \ |
| \ |
| return dest; \ |
| } |
| |
| MEMCPY(VG_Z_LIBC_SONAME, memcpy) |
| #if defined(VGO_linux) |
| MEMCPY(VG_Z_LD_SO_1, memcpy) /* ld.so.1 */ |
| MEMCPY(VG_Z_LD64_SO_1, memcpy) /* ld64.so.1 */ |
| #endif |
| |
| |
| /* Copy SRC to DEST, returning the address of the terminating '\0' in |
| DEST. (minor variant of strcpy) */ |
| #define STPCPY(soname, fnname) \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( char* dst, const char* src ); \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname) ( char* dst, const char* src ) \ |
| { \ |
| while (*src) *dst++ = *src++; \ |
| *dst = 0; \ |
| \ |
| return dst; \ |
| } |
| |
| STPCPY(VG_Z_LIBC_SONAME, stpcpy) |
| #if defined(VGO_linux) |
| STPCPY(VG_Z_LD_LINUX_SO_2, stpcpy) |
| STPCPY(VG_Z_LD_LINUX_X86_64_SO_2, stpcpy) |
| #endif |
| |
| |
| /* Find the first occurrence of C in S. */ |
| #define GLIBC232_RAWMEMCHR(soname, fnname) \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const char* s, int c_in); \ |
| char* VG_REPLACE_FUNCTION_ZU(soname,fnname) (const char* s, int c_in) \ |
| { \ |
| unsigned char c = (unsigned char) c_in; \ |
| unsigned char* char_ptr = (unsigned char *)s; \ |
| while (1) { \ |
| if (*char_ptr == c) return char_ptr; \ |
| char_ptr++; \ |
| } \ |
| } |
| |
| GLIBC232_RAWMEMCHR(VG_Z_LIBC_SONAME, rawmemchr) |
| #if defined (VGO_linux) |
| GLIBC232_RAWMEMCHR(VG_Z_LIBC_SONAME, __GI___rawmemchr) |
| #endif |
| |
| |
| #define STRSTR(soname, fnname) \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| (void* haystack, void* needle); \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| (void* haystack, void* needle) \ |
| { \ |
| UChar* h = (UChar*)haystack; \ |
| UChar* n = (UChar*)needle; \ |
| \ |
| /* find the length of n, not including terminating zero */ \ |
| UWord nlen = 0; \ |
| while (n[nlen]) nlen++; \ |
| \ |
| /* if n is the empty string, match immediately. */ \ |
| if (nlen == 0) return h; \ |
| \ |
| /* assert(nlen >= 1); */ \ |
| UChar n0 = n[0]; \ |
| \ |
| while (1) { \ |
| UChar hh = *h; \ |
| if (hh == 0) return NULL; \ |
| if (hh != n0) { h++; continue; } \ |
| \ |
| UWord i; \ |
| for (i = 0; i < nlen; i++) { \ |
| if (n[i] != h[i]) \ |
| break; \ |
| } \ |
| /* assert(i >= 0 && i <= nlen); */ \ |
| if (i == nlen) \ |
| return h; \ |
| \ |
| h++; \ |
| } \ |
| } |
| |
| #if defined(VGO_linux) |
| STRSTR(VG_Z_LIBC_SONAME, strstr) |
| #endif |
| |
| |
| #define STRPBRK(soname, fnname) \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| (void* sV, void* acceptV); \ |
| void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \ |
| (void* sV, void* acceptV) \ |
| { \ |
| UChar* s = (UChar*)sV; \ |
| UChar* accept = (UChar*)acceptV; \ |
| \ |
| /* find the length of 'accept', not including terminating zero */ \ |
| UWord nacc = 0; \ |
| while (accept[nacc]) nacc++; \ |
| \ |
| /* if n is the empty string, fail immediately. */ \ |
| if (nacc == 0) return NULL; \ |
| \ |
| /* assert(nacc >= 1); */ \ |
| while (1) { \ |
| UWord i; \ |
| UChar sc = *s; \ |
| if (sc == 0) \ |
| break; \ |
| for (i = 0; i < nacc; i++) { \ |
| if (sc == accept[i]) \ |
| return s; \ |
| } \ |
| s++; \ |
| } \ |
| \ |
| return NULL; \ |
| } |
| |
| #if defined(VGO_linux) |
| STRPBRK(VG_Z_LIBC_SONAME, strpbrk) |
| #endif |
| |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end pc_intercepts.c ---*/ |
| /*--------------------------------------------------------------------*/ |
