MEM_CHECK_DEFINED: replace HAVE_valgrind

HAVE_valgrind_or_MSAN to HAVE_valgrind was incorrect in
af784385b4.

In my_valgrind.h when clang exists (hence no __has_feature(memory_sanitizer),
and -DWITH_VALGRIND=1, but without memcheck.h, we end up with a MEM_CHECK_DEFINED
being empty.

If we are also doing a CMAKE_BUILD_TYPE=Debug this results a number of
[-Werror,-Wunused-variable] errors because MEM_CHECK_DEFINED is empty.
With MEM_CHECK_DEFINED empty, there becomes no uses of this of the
fixed field and innodb variables in this patch.

So we stop using HAVE_valgrind as catchall and use the name
HAVE_CHECK_MEM to indicate that a CHECK_MEM_DEFINED function exists.

Reviewer: Monty

Corrects: af784385b4

include/my_valgrind.h

@@ -27,6 +27,7 @@
 #if __has_feature(memory_sanitizer)
 # include <sanitizer/msan_interface.h>
 # define HAVE_valgrind
+# define HAVE_MEM_CHECK
 # define MEM_UNDEFINED(a,len) __msan_allocated_memory(a,len)
 # define MEM_MAKE_ADDRESSABLE(a,len) MEM_UNDEFINED(a,len)
 # define MEM_MAKE_DEFINED(a,len) __msan_unpoison(a,len)
@@ -38,6 +39,7 @@
 # define REDZONE_SIZE 8
 #elif defined(HAVE_VALGRIND_MEMCHECK_H) && defined(HAVE_valgrind)
 # include <valgrind/memcheck.h>
+# define HAVE_MEM_CHECK
 # define MEM_UNDEFINED(a,len) VALGRIND_MAKE_MEM_UNDEFINED(a,len)
 # define MEM_MAKE_ADDRESSABLE(a,len) MEM_UNDEFINED(a,len)
 # define MEM_MAKE_DEFINED(a,len) VALGRIND_MAKE_MEM_DEFINED(a,len)

sql/field.cc

@@ -7854,7 +7854,7 @@ bool Field_varstring::send(Protocol *protocol)
 }
 
 
-#ifdef HAVE_valgrind
+#ifdef HAVE_MEM_CHECK
 void Field_varstring::mark_unused_memory_as_defined()
 {
   uint used_length= get_length();

sql/field.h

@@ -998,7 +998,7 @@ public:
   */
   virtual int store_from_statistical_minmax_field(Field *field, String *str);
 
-#ifdef HAVE_valgrind
+#ifdef HAVE_MEM_CHECK
   /**
     Mark unused memory in the field as defined. Mainly used to ensure
     that if we write full field to disk (for example in
@@ -4161,7 +4161,7 @@ public:
   }
   int  store(const char *to,size_t length,CHARSET_INFO *charset) override;
   using Field_str::store;
-#ifdef HAVE_valgrind
+#ifdef HAVE_MEM_CHECK
   void mark_unused_memory_as_defined() override;
 #endif
   double val_real() override;

storage/innobase/include/srv0mon.h

@@ -637,14 +637,14 @@ Use MONITOR_DEC if appropriate mutex protection exists.
 		}							\
 	}
 
-#ifdef HAVE_valgrind
+#ifdef HAVE_MEM_CHECK
 # define MONITOR_CHECK_DEFINED(value) do {	\
 	mon_type_t m = value;			\
 	MEM_CHECK_DEFINED(&m, sizeof m);	\
 } while (0)
-#else /* HAVE_valgrind */
+#else /* HAVE_MEM_CHECK */
 # define MONITOR_CHECK_DEFINED(value) (void) 0
-#endif /* HAVE_valgrind */
+#endif /* HAVE_MEM_CHECK */
 
 #define	MONITOR_INC_VALUE(monitor, value)				\
 	MONITOR_CHECK_DEFINED(value);					\

storage/innobase/page/page0cur.cc

@@ -1311,7 +1311,7 @@ page_cur_insert_rec_low(
   /* 1. Get the size of the physical record in the page */
   const ulint rec_size= rec_offs_size(offsets);
 
-#ifdef HAVE_valgrind
+#ifdef HAVE_MEM_CHECK
   {
     const void *rec_start= rec - rec_offs_extra_size(offsets);
     ulint extra_size= rec_offs_extra_size(offsets) -
@@ -1323,7 +1323,7 @@ page_cur_insert_rec_low(
     /* The variable-length header must be valid. */
     MEM_CHECK_DEFINED(rec_start, extra_size);
   }
-#endif /* HAVE_valgrind */
+#endif /* HAVE_MEM_CHECK */
 
   /* 2. Try to find suitable space from page memory management */
   bool reuse= false;
@@ -1717,7 +1717,7 @@ page_cur_insert_rec_zip(
   /* 1. Get the size of the physical record in the page */
   const ulint rec_size= rec_offs_size(offsets);
 
-#ifdef HAVE_valgrind
+#ifdef HAVE_MEM_CHECK
   {
     const void *rec_start= rec - rec_offs_extra_size(offsets);
     ulint extra_size= rec_offs_extra_size(offsets) - REC_N_NEW_EXTRA_BYTES;
@@ -1726,7 +1726,7 @@ page_cur_insert_rec_zip(
     /* The variable-length header must be valid. */
     MEM_CHECK_DEFINED(rec_start, extra_size);
   }
-#endif /* HAVE_valgrind */
+#endif /* HAVE_MEM_CHECK */
   const bool reorg_before_insert= page_has_garbage(cursor->block->frame) &&
     rec_size > page_get_max_insert_size(cursor->block->frame, 1) &&
     rec_size <= page_get_max_insert_size_after_reorganize(cursor->block->frame,