From: Tom Hughes <tom@compton.nu>
Date: Mon, 23 Aug 2004 18:39:09 +0000 (+0000)
Subject: Prevent a memcpy of zero bytes from complaining if one or both of the
X-Git-Tag: svn/VALGRIND_2_2_0~28
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=090cf06f43ff782b2b49035dfc340b6c5f525e50;p=thirdparty%2Fvalgrind.git

Prevent a memcpy of zero bytes from complaining if one or both of the
pointers given as arguments is uninitialised.

CCMAIL: 86989-done@bugs.kde.org


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2608
---

diff --git a/memcheck/mac_replace_strmem.c b/memcheck/mac_replace_strmem.c
index 560343089c..037b989ff0 100644
--- a/memcheck/mac_replace_strmem.c
+++ b/memcheck/mac_replace_strmem.c
@@ -273,9 +273,12 @@ void* memcpy( void *dst, const void *src, unsigned int len )
    register char *d;
    register char *s;
 
+   if (len == 0)
+      return dst;
+
    if (is_overlap(dst, src, len, len))
       complain3("memcpy", dst, src, len);
-      
+
    if ( dst > src ) {
       d = (char *)dst + len - 1;
       s = (char *)src + len - 1;