Fix -Wclass-memaccess warnings in InnoDB,XtraDB

storage/innobase/buf/buf0buf.cc

@@ -1611,7 +1611,7 @@ buf_relocate(
 	}
 #endif /* UNIV_DEBUG */
 
-	memcpy(dpage, bpage, sizeof *dpage);
+	new (dpage) buf_page_t(*bpage);
 
 	ut_d(bpage->in_LRU_list = FALSE);
 	ut_d(bpage->in_page_hash = FALSE);

storage/innobase/buf/buf0lru.cc

@@ -1849,7 +1849,7 @@ buf_LRU_free_page(
 	} else if (buf_page_get_state(bpage) == BUF_BLOCK_FILE_PAGE) {
 		b = buf_page_alloc_descriptor();
 		ut_a(b);
-		memcpy(b, bpage, sizeof *b);
+		new (b) buf_page_t(*bpage);
 	}
 
 	ut_ad(buf_pool_mutex_own(buf_pool));

storage/innobase/include/dict0mem.h

@@ -509,6 +509,9 @@ struct dict_field_t{
 	unsigned	fixed_len:10;	/*!< 0 or the fixed length of the
 					column if smaller than
 					DICT_ANTELOPE_MAX_INDEX_COL_LEN */
+
+	/** Zero-initialize all fields */
+	dict_field_t() : col(NULL), name(NULL), prefix_len(0), fixed_len(0) {}
 };
 
 /**********************************************************************//**

storage/innobase/include/row0ftsort.h

 /*****************************************************************************
 
 Copyright (c) 2010, 2016, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2015, 2018, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -106,6 +107,14 @@ struct fts_tokenize_ctx {
 	ib_rbt_t*		cached_stopword;/*!< in: stopword list */
 	dfield_t		sort_field[FTS_NUM_FIELDS_SORT];
 						/*!< in: sort field */
+
+	fts_tokenize_ctx() :
+		processed_len(0), init_pos(0), buf_used(0),
+		rows_added(), cached_stopword(NULL), sort_field()
+	{
+		memset(rows_added, 0, sizeof rows_added);
+		memset(sort_field, 0, sizeof sort_field);
+	}
 };
 
 typedef struct fts_tokenize_ctx fts_tokenize_ctx_t;

storage/innobase/row/row0ftsort.cc

@@ -638,7 +638,6 @@ fts_parallel_tokenization(
 	merge_file = psort_info->merge_file;
 	blob_heap = mem_heap_create(512);
 	memset(&doc, 0, sizeof(doc));
-	memset(&t_ctx, 0, sizeof(t_ctx));
 	memset(mycount, 0, FTS_NUM_AUX_INDEX * sizeof(int));
 
 	doc.charset = fts_index_get_charset(

storage/innobase/row/row0import.cc

@@ -2620,8 +2620,6 @@ row_import_cfg_read_index_fields(
 
 	dict_field_t*	field = index->m_fields;
 
-	memset(field, 0x0, sizeof(*field) * n_fields);
-
 	for (ulint i = 0; i < n_fields; ++i, ++field) {
 		byte*		ptr = row;
 
@@ -2639,6 +2637,8 @@ row_import_cfg_read_index_fields(
 			return(DB_IO_ERROR);
 		}
 
+		new (field) dict_field_t();
+
 		field->prefix_len = mach_read_from_4(ptr);
 		ptr += sizeof(ib_uint32_t);
 

storage/innobase/trx/trx0trx.cc

@@ -140,7 +140,7 @@ trx_create(void)
 
 	trx->global_read_view_heap = mem_heap_create(256);
 
-	trx->xid.formatID = -1;
+	trx->xid.null();
 
 	trx->op_info = "";
 

storage/xtradb/buf/buf0buf.cc

@@ -1718,7 +1718,7 @@ buf_relocate(
 	}
 #endif /* UNIV_DEBUG */
 
-	memcpy(dpage, bpage, sizeof *dpage);
+	new (dpage) buf_page_t(*bpage);
 
 	ut_d(bpage->in_LRU_list = FALSE);
 	ut_d(bpage->in_page_hash = FALSE);

storage/xtradb/buf/buf0lru.cc

@@ -2112,7 +2112,7 @@ buf_LRU_free_page(
 	}
 
 	if (b) {
-		memcpy(b, bpage, sizeof *b);
+		new (b) buf_page_t(*bpage);
 	}
 
 	if (!buf_LRU_block_remove_hashed(bpage, zip)) {

storage/xtradb/include/dict0mem.h

@@ -516,6 +516,9 @@ struct dict_field_t{
 	unsigned	fixed_len:10;	/*!< 0 or the fixed length of the
 					column if smaller than
 					DICT_ANTELOPE_MAX_INDEX_COL_LEN */
+
+	/** Zero-initialize all fields */
+	dict_field_t() : col(NULL), name(NULL), prefix_len(0), fixed_len(0) {}
 };
 
 /**********************************************************************//**

storage/xtradb/include/row0ftsort.h

 /*****************************************************************************
 
 Copyright (c) 2010, 2016, Oracle and/or its affiliates. All Rights Reserved.
+Copyright (c) 2015, 2018, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -106,6 +107,14 @@ struct fts_tokenize_ctx {
 	ib_rbt_t*		cached_stopword;/*!< in: stopword list */
 	dfield_t		sort_field[FTS_NUM_FIELDS_SORT];
 						/*!< in: sort field */
+
+	fts_tokenize_ctx() :
+		processed_len(0), init_pos(0), buf_used(0),
+		rows_added(), cached_stopword(NULL), sort_field()
+	{
+		memset(rows_added, 0, sizeof rows_added);
+		memset(sort_field, 0, sizeof sort_field);
+	}
 };
 
 typedef struct fts_tokenize_ctx fts_tokenize_ctx_t;

storage/xtradb/row/row0ftsort.cc

@@ -641,7 +641,6 @@ fts_parallel_tokenization(
 	merge_file = psort_info->merge_file;
 	blob_heap = mem_heap_create(512);
 	memset(&doc, 0, sizeof(doc));
-	memset(&t_ctx, 0, sizeof(t_ctx));
 	memset(mycount, 0, FTS_NUM_AUX_INDEX * sizeof(int));
 
 	doc.charset = fts_index_get_charset(

storage/xtradb/row/row0import.cc

@@ -2620,8 +2620,6 @@ row_import_cfg_read_index_fields(
 
 	dict_field_t*	field = index->m_fields;
 
-	memset(field, 0x0, sizeof(*field) * n_fields);
-
 	for (ulint i = 0; i < n_fields; ++i, ++field) {
 		byte*		ptr = row;
 
@@ -2639,6 +2637,8 @@ row_import_cfg_read_index_fields(
 			return(DB_IO_ERROR);
 		}
 
+		new (field) dict_field_t();
+
 		field->prefix_len = mach_read_from_4(ptr);
 		ptr += sizeof(ib_uint32_t);
 

storage/xtradb/trx/trx0trx.cc

@@ -276,7 +276,7 @@ trx_create(void)
 	trx->distinct_page_access_hash = NULL;
 	trx->take_stats = FALSE;
 
-	trx->xid.formatID = -1;
+	trx->xid.null();
 
 	trx->op_info = "";