Fixed bugs found by valgrind

- Some of the bug fixes are backports from 10.5!
- The fix in innobase/fil/fil0fil.cc is just a backport to get less
  error messages in mysqld.1.err when running with valgrind.
- Renamed HAVE_valgrind_or_MSAN to HAVE_valgrind

1 files changed, 2 insertions, 0 deletions

diff --git a/include/my_sys.h b/include/my_sys.h
index 61551d38337..60f5613eec1 100644
--- a/include/my_sys.h
+++ b/include/my_sys.h
@@ -535,6 +535,7 @@ static inline int my_b_read(IO_CACHE *info, uchar *Buffer, size_t Count)
 
 static inline int my_b_write(IO_CACHE *info, const uchar *Buffer, size_t Count)
 {
+  MEM_CHECK_DEFINED(Buffer, Count);
   if (info->write_pos + Count <= info->write_end)
   {
     memcpy(info->write_pos, Buffer, Count);
@@ -556,6 +557,7 @@ static inline int my_b_get(IO_CACHE *info)
 
 static inline my_bool my_b_write_byte(IO_CACHE *info, uchar chr)
 {
+  MEM_CHECK_DEFINED(&chr, 1);
   if (info->write_pos >= info->write_end)
     if (my_b_flush_io_cache(info, 1))
       return 1;