Introduce UNIV_BLOB_NULL_DEBUG for temporarily hiding Bug#12650861.

Some ut_a(!rec_offs_any_null_extern()) assertion failures are indicating
genuine BLOB bugs, others are bogus failures when rolling back incomplete
transactions at crash recovery. This needs more work, and until I get a
chance to work on it, other testing must not be disrupted by this.

storage/innobase/btr/btr0cur.c

@@ -1592,9 +1592,9 @@ btr_cur_optimistic_update(
 
 	heap = mem_heap_create(1024);
 	offsets = rec_get_offsets(rec, index, NULL, ULINT_UNDEFINED, &heap);
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 	ut_a(!rec_offs_any_null_extern(rec, offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 #ifdef UNIV_DEBUG
 	if (btr_cur_print_record_ops && thr) {

storage/innobase/include/rem0rec.h

@@ -339,7 +339,7 @@ rec_offs_any_extern(
 /*================*/
 				/* out: TRUE if a field is stored externally */
 	const ulint*	offsets);/* in: array returned by rec_get_offsets() */
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 /********************************************************
 Determine if the offsets are for a record containing null BLOB pointers. */
 UNIV_INLINE
@@ -351,7 +351,7 @@ rec_offs_any_null_extern(
 					or NULL if none found */
 	rec_t*		rec,		/*!< in: record */
 	const ulint*	offsets);	/*!< in: rec_get_offsets(rec) */
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 /***************************************************************
 Sets the value of the ith field extern storage bit. */
 UNIV_INLINE

storage/innobase/include/rem0rec.ic

@@ -1021,7 +1021,7 @@ rec_offs_any_extern(
 	return(FALSE);
 }
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 /********************************************************
 Determine if the offsets are for a record containing null BLOB pointers. */
 UNIV_INLINE
@@ -1055,7 +1055,7 @@ rec_offs_any_null_extern(
 
 	return(NULL);
 }
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 /***************************************************************
 Sets the value of the ith field extern storage bit. */

storage/innobase/include/univ.i

@@ -88,8 +88,8 @@ memory is read outside the allocated blocks. */
 #if 0
 #define UNIV_DEBUG_VALGRIND			/* Enable extra
 						Valgrind instrumentation */
-#define UNIV_BLOB_LIGHT_DEBUG			/* Enable off-page column
-						debugging without UNIV_DEBUG */
+#define UNIV_BLOB_NULL_DEBUG			/* Enable deep off-page
+						column debugging */
 #define UNIV_DEBUG				/* Enable ut_ad() assertions */
 #define UNIV_LIST_DEBUG				/* debug UT_LIST_ macros */
 #define UNIV_MEM_DEBUG				/* detect memory leaks etc */

storage/innobase/row/row0row.c

@@ -210,13 +210,13 @@ row_build(
 		ut_ad(rec_offs_validate(rec, index, offsets));
 	}
 
-#if 0/* defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG*/
+#if 0 && defined UNIV_BLOB_NULL_DEBUG
 	/* This one can fail in trx_rollback_or_clean_all_without_sess()
 	if the server crashed during an insert before the
 	btr_store_big_rec_extern_fields() did mtr_commit()
 	all BLOB pointers to the clustered index record. */
 	ut_a(!rec_offs_any_null_extern(rec, offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* 0 && UNIV_BLOB_NULL_DEBUG */
 
 	if (type != ROW_COPY_POINTERS) {
 		/* Take a copy of rec to heap */
@@ -310,10 +310,10 @@ row_rec_to_index_entry(
 		rec = rec_copy(buf, rec, offsets);
 		/* Avoid a debug assertion in rec_offs_validate(). */
 		rec_offs_make_valid(rec, index, offsets);
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 	} else {
 		ut_a(!rec_offs_any_null_extern(rec, offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 	}
 
 	rec_len = rec_offs_n_fields(offsets);

storage/innobase/row/row0vers.c

@@ -473,10 +473,10 @@ row_vers_build_for_consistent_read(
 				/* The view already sees this version: we can
 				copy it to in_heap and return */
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#if defined UNIV_BLOB_NULL_DEBUG
 				ut_a(!rec_offs_any_null_extern(
 					     version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 				buf = mem_heap_alloc(in_heap,
 						     rec_offs_size(*offsets));
@@ -511,9 +511,9 @@ row_vers_build_for_consistent_read(
 		*offsets = rec_get_offsets(prev_version, index, *offsets,
 					   ULINT_UNDEFINED, offset_heap);
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 		ut_a(!rec_offs_any_null_extern(prev_version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 		trx_id = row_get_rec_trx_id(prev_version, index, *offsets);
 
@@ -615,9 +615,9 @@ row_vers_build_for_semi_consistent_read(
 			/* We found a version that belongs to a
 			committed transaction: return it. */
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 			ut_a(!rec_offs_any_null_extern(version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 			if (rec == version) {
 				*old_vers = rec;
@@ -676,9 +676,9 @@ row_vers_build_for_semi_consistent_read(
 		version = prev_version;
 		*offsets = rec_get_offsets(version, index, *offsets,
 					   ULINT_UNDEFINED, offset_heap);
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 		ut_a(!rec_offs_any_null_extern(version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 	}/* for (;;) */
 
 	if (heap) {

storage/innobase/trx/trx0rec.c

@@ -1397,9 +1397,9 @@ trx_undo_prev_version_build(
 		return(DB_ERROR);
 	}
 
-# if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+# ifdef UNIV_BLOB_NULL_DEBUG
 	ut_a(!rec_offs_any_null_extern(rec, offsets));
-# endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+# endif /* UNIV_BLOB_NULL_DEBUG */
 
 	if (row_upd_changes_field_size_or_external(index, offsets, update)) {
 		ulint*	ext_vect;

storage/innodb_plugin/btr/btr0cur.c

@@ -1871,9 +1871,9 @@ btr_cur_optimistic_update(
 
 	heap = mem_heap_create(1024);
 	offsets = rec_get_offsets(rec, index, NULL, ULINT_UNDEFINED, &heap);
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 	ut_a(!rec_offs_any_null_extern(rec, offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 #ifdef UNIV_DEBUG
 	if (btr_cur_print_record_ops && thr) {

storage/innodb_plugin/include/rem0rec.h

@@ -480,7 +480,7 @@ ulint
 rec_offs_any_extern(
 /*================*/
 	const ulint*	offsets);/*!< in: array returned by rec_get_offsets() */
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 /******************************************************//**
 Determine if the offsets are for a record containing null BLOB pointers.
 @return	first field containing a null BLOB pointer, or NULL if none found */
@@ -491,7 +491,7 @@ rec_offs_any_null_extern(
 	const rec_t*	rec,		/*!< in: record */
 	const ulint*	offsets)	/*!< in: rec_get_offsets(rec) */
 	__attribute__((nonnull, warn_unused_result));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 /******************************************************//**
 Returns nonzero if the extern bit is set in nth field of rec.
 @return	nonzero if externally stored */

storage/innodb_plugin/include/rem0rec.ic

@@ -1088,7 +1088,7 @@ rec_offs_any_extern(
 	return(UNIV_UNLIKELY(*rec_offs_base(offsets) & REC_OFFS_EXTERNAL));
 }
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 /******************************************************//**
 Determine if the offsets are for a record containing null BLOB pointers.
 @return	first field containing a null BLOB pointer, or NULL if none found */
@@ -1124,7 +1124,7 @@ rec_offs_any_null_extern(
 
 	return(NULL);
 }
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 /******************************************************//**
 Returns nonzero if the extern bit is set in nth field of rec.

storage/innodb_plugin/include/univ.i

@@ -179,6 +179,8 @@ command. Not tested on Windows. */
 						debugging without UNIV_DEBUG */
 #define UNIV_BLOB_LIGHT_DEBUG			/* Enable off-page column
 						debugging without UNIV_DEBUG */
+#define UNIV_BLOB_NULL_DEBUG			/* Enable deep off-page
+						column debugging */
 #define UNIV_DEBUG				/* Enable ut_ad() assertions
 						and disable UNIV_INLINE */
 #define UNIV_DEBUG_LOCK_VALIDATE		/* Enable

storage/innodb_plugin/row/row0row.c

@@ -231,13 +231,13 @@ row_build(
 		ut_ad(rec_offs_validate(rec, index, offsets));
 	}
 
-#if 0 /* defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG */
+#if 0 && defined UNIV_BLOB_NULL_DEBUG
 	/* This one can fail in trx_rollback_active() if
 	the server crashed during an insert before the
 	btr_store_big_rec_extern_fields() did mtr_commit()
 	all BLOB pointers to the clustered index record. */
 	ut_a(!rec_offs_any_null_extern(rec, offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* 0 && UNIV_BLOB_NULL_DEBUG */
 
 	if (type != ROW_COPY_POINTERS) {
 		/* Take a copy of rec to heap */
@@ -423,10 +423,10 @@ row_rec_to_index_entry(
 		rec = rec_copy(buf, rec, offsets);
 		/* Avoid a debug assertion in rec_offs_validate(). */
 		rec_offs_make_valid(rec, index, offsets);
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 	} else {
 		ut_a(!rec_offs_any_null_extern(rec, offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 	}
 
 	entry = row_rec_to_index_entry_low(rec, index, offsets, n_ext, heap);

storage/innodb_plugin/row/row0vers.c

@@ -550,10 +550,10 @@ row_vers_build_for_consistent_read(
 				/* The view already sees this version: we can
 				copy it to in_heap and return */
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 				ut_a(!rec_offs_any_null_extern(
 					     version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 				buf = mem_heap_alloc(in_heap,
 						     rec_offs_size(*offsets));
@@ -588,9 +588,9 @@ row_vers_build_for_consistent_read(
 		*offsets = rec_get_offsets(prev_version, index, *offsets,
 					   ULINT_UNDEFINED, offset_heap);
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 		ut_a(!rec_offs_any_null_extern(prev_version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 		trx_id = row_get_rec_trx_id(prev_version, index, *offsets);
 
@@ -691,9 +691,9 @@ row_vers_build_for_semi_consistent_read(
 			/* We found a version that belongs to a
 			committed transaction: return it. */
 
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 			ut_a(!rec_offs_any_null_extern(version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 
 			if (rec == version) {
 				*old_vers = rec;
@@ -752,9 +752,9 @@ row_vers_build_for_semi_consistent_read(
 		version = prev_version;
 		*offsets = rec_get_offsets(version, index, *offsets,
 					   ULINT_UNDEFINED, offset_heap);
-#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+#ifdef UNIV_BLOB_NULL_DEBUG
 		ut_a(!rec_offs_any_null_extern(version, *offsets));
-#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+#endif /* UNIV_BLOB_NULL_DEBUG */
 	}/* for (;;) */
 
 	if (heap) {

storage/innodb_plugin/trx/trx0rec.c

@@ -1577,9 +1577,9 @@ trx_undo_prev_version_build(
 		return(DB_ERROR);
 	}
 
-# if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
+# ifdef UNIV_BLOB_NULL_DEBUG
 	ut_a(!rec_offs_any_null_extern(rec, offsets));
-# endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
+# endif /* UNIV_BLOB_NULL_DEBUG */
 
 	if (row_upd_changes_field_size_or_external(index, offsets, update)) {
 		ulint	n_ext;