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Avoid false positives w/ overlapping memcpy args with _FORTIFY_SOURCE's
memcpy_chk.
https://src.fedoraproject.org/rpms/valgrind/raw/rawhide/f/valgrind-3.21.0-no-memcpy-replace-check.patch
https://bugs.kde.org/show_bug.cgi?id=402833
https://bugs.kde.org/show_bug.cgi?id=453084
--- a/shared/vg_replace_strmem.c
+++ b/shared/vg_replace_strmem.c
@@ -1128,7 +1128,7 @@ static inline void my_exit ( int x )
MEMMOVE_OR_MEMCPY(20181, soname, fnname, 0)
#define MEMCPY(soname, fnname) \
- MEMMOVE_OR_MEMCPY(20180, soname, fnname, 1)
+ MEMMOVE_OR_MEMCPY(20180, soname, fnname, 0) /* See KDE bug #402833 */
#if defined(VGO_linux)
/* For older memcpy we have to use memmove-like semantics and skip
@@ -1714,8 +1714,6 @@ static inline void my_exit ( int x )
RECORD_COPY(len); \
if (len == 0) \
return dst; \
- if (is_overlap(dst, src, len, len)) \
- RECORD_OVERLAP_ERROR("memcpy_chk", dst, src, len); \
if ( dst > src ) { \
d = (HChar *)dst + len - 1; \
s = (const HChar *)src + len - 1; \
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