Intercept __memcpy_chk, which appears in glibc-2.6.1. Also fix some

backslash uglyness.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7155

memcheck/mc_replace_strmem.c

@@ -171,7 +171,7 @@ STRCHR(m_ld_linux_x86_64_so_2, index)
       while (*dst) dst++; \
       while (*src) *dst++ = *src++; \
       *dst = 0; \
- \
+      \
       /* This is a bit redundant, I think;  any overlap and the strcat will */ \
       /* go forever... or until a seg fault occurs. */ \
       if (is_overlap(dst_orig,  \
@@ -179,7 +179,7 @@ STRCHR(m_ld_linux_x86_64_so_2, index)
                      (Addr)dst-(Addr)dst_orig+1,  \
                      (Addr)src-(Addr)src_orig+1)) \
          RECORD_OVERLAP_ERROR("strcat", dst_orig, src_orig, 0); \
- \
+      \
       return dst_orig; \
    }
 
@@ -195,11 +195,11 @@ STRCAT(m_libc_soname, strcat)
       const Char* src_orig = src; \
             Char* dst_orig = dst; \
       SizeT m = 0; \
- \
+      \
       while (*dst) dst++; \
       while (m < n && *src) { m++; *dst++ = *src++; } /* concat <= n chars */ \
       *dst = 0;                                       /* always add null   */ \
- \
+      \
       /* This checks for overlap after copying, unavoidable without */ \
       /* pre-counting lengths... should be ok */ \
       if (is_overlap(dst_orig,  \
@@ -207,7 +207,7 @@ STRCAT(m_libc_soname, strcat)
                      (Addr)dst-(Addr)dst_orig+1,  \
                      (Addr)src-(Addr)src_orig+1)) \
          RECORD_OVERLAP_ERROR("strncat", dst_orig, src_orig, n); \
- \
+      \
       return dst_orig; \
    }
 
@@ -250,10 +250,10 @@ STRLEN(m_ld_linux_x86_64_so_2, strlen)
    { \
       const Char* src_orig = src; \
             Char* dst_orig = dst; \
- \
+      \
       while (*src) *dst++ = *src++; \
       *dst = 0; \
- \
+      \
       /* This checks for overlap after copying, unavoidable without */ \
       /* pre-counting length... should be ok */ \
       if (is_overlap(dst_orig,  \
@@ -261,7 +261,7 @@ STRLEN(m_ld_linux_x86_64_so_2, strlen)
                      (Addr)dst-(Addr)dst_orig+1,  \
                      (Addr)src-(Addr)src_orig+1)) \
          RECORD_OVERLAP_ERROR("strcpy", dst_orig, src_orig, 0); \
- \
+      \
       return dst_orig; \
    }
 
@@ -277,7 +277,7 @@ STRCPY(m_libc_soname, strcpy)
       const Char* src_orig = src; \
             Char* dst_orig = dst; \
       SizeT m = 0; \
- \
+      \
       while (m   < n && *src) { m++; *dst++ = *src++; } \
       /* Check for overlap after copying; all n bytes of dst are relevant, */ \
       /* but only m+1 bytes of src if terminator was found */ \
@@ -303,10 +303,10 @@ STRNCPY(m_libc_soname, strncpy)
          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++; \
       } \
    }
@@ -362,13 +362,13 @@ MEMCHR(m_libc_soname, memchr)
    { \
       register char *d; \
       register char *s; \
- \
+      \
       if (len == 0) \
          return dst; \
- \
+      \
       if (is_overlap(dst, src, len, len)) \
          RECORD_OVERLAP_ERROR("memcpy", dst, src, len); \
- \
+      \
       if ( dst > src ) { \
          d = (char *)dst + len - 1; \
          s = (char *)src + len - 1; \
@@ -423,7 +423,7 @@ MEMCPY(NONE, _intel_fast_memcpy)
       unsigned char b0; \
       unsigned char* s1 = (unsigned char*)s1V; \
       unsigned char* s2 = (unsigned char*)s2V; \
- \
+      \
       while (n != 0) { \
          a0 = s1[0]; \
          b0 = s2[0]; \
@@ -450,10 +450,10 @@ MEMCMP(m_ld_so_1, bcmp)
    { \
       const Char* src_orig = src; \
             Char* dst_orig = dst; \
- \
+      \
       while (*src) *dst++ = *src++; \
       *dst = 0; \
- \
+      \
       /* This checks for overlap after copying, unavoidable without */ \
       /* pre-counting length... should be ok */ \
       if (is_overlap(dst_orig,  \
@@ -461,7 +461,7 @@ MEMCMP(m_ld_so_1, bcmp)
                      (Addr)dst-(Addr)dst_orig+1,  \
                      (Addr)src-(Addr)src_orig+1)) \
          RECORD_OVERLAP_ERROR("stpcpy", dst_orig, src_orig, 0); \
- \
+      \
       return dst; \
    }
 
@@ -677,6 +677,50 @@ GLIBC25_MEMPCPY(m_libc_soname, mempcpy)
 GLIBC25_MEMPCPY(m_ld_so_1,     mempcpy) /* ld.so.1 */
 
 
+#define GLIBC26___MEMCPY_CHK(soname, fnname) \
+   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
+            (void* dst, const void* src, SizeT len, SizeT dstlen ); \
+   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
+            (void* dst, const void* src, SizeT len, SizeT dstlen ) \
+   { \
+      extern void _exit(int status); \
+      register char *d; \
+      register char *s; \
+      \
+      if (dstlen < len) goto badness; \
+      \
+      if (len == 0) \
+         return dst; \
+      \
+      if (is_overlap(dst, src, len, len)) \
+         RECORD_OVERLAP_ERROR("memcpy_chk", dst, src, len); \
+      \
+      if ( dst > src ) { \
+         d = (char *)dst + len - 1; \
+         s = (char *)src + len - 1; \
+         while ( len-- ) { \
+            *d-- = *s--; \
+         } \
+      } else if ( dst < src ) { \
+         d = (char *)dst; \
+         s = (char *)src; \
+         while ( len-- ) { \
+            *d++ = *s++; \
+         } \
+      } \
+      return dst; \
+     badness: \
+      VALGRIND_PRINTF_BACKTRACE( \
+         "*** memcpy_chk: buffer overflow detected ***: " \
+         "program terminated"); \
+     _exit(127); \
+     /*NOTREACHED*/ \
+     return NULL; \
+   }
+
+GLIBC26___MEMCPY_CHK(m_libc_soname, __memcpy_chk)
+
+
 /*------------------------------------------------------------*/
 /*--- Improve definedness checking of process environment  ---*/
 /*------------------------------------------------------------*/