Fix buildbot valgrind errors on test innodb.innodb-page_compression_tables

Problem was that temporal buffers allocated for page compression
are not initialized and rest of the page that is actually writen
was als not initialized after previous usage.

storage/innobase/fil/fil0pagecompress.cc

@@ -456,11 +456,14 @@ fil_compress_page(
 
 	/* Actual write needs to be alligned on block size */
 	if (write_size % block_size) {
-#ifdef UNIV_DEBUG
 		size_t tmp = write_size;
+#ifdef UNIV_DEBUG
 		ut_a(block_size > 0);
 #endif
 		write_size =  (size_t)ut_uint64_align_up((ib_uint64_t)write_size, block_size);
+		/* Initialize rest of the written data to avoid
+		uninitialized bytes */
+		memset(out_buf+tmp, 0, write_size-tmp);
 #ifdef UNIV_DEBUG
 		ut_a(write_size > 0 && ((write_size % block_size) == 0));
 		ut_a(write_size >= tmp);
@@ -477,19 +480,10 @@ fil_compress_page(
 	srv_stats.page_compression_saved.add((len - write_size));
 	srv_stats.pages_page_compressed.inc();
 
-#if defined (__linux__) && (!defined(FALLOC_FL_PUNCH_HOLE) || !defined (FALLOC_FL_KEEP_SIZE))
-	if (srv_use_trim) {
-		ut_print_timestamp(stderr);
-		fprintf(stderr,
-			"  InnoDB: [Warning] System does not support FALLOC_FL_PUNCH_HOLE || FALLOC_FL_KEEP_SIZE.\n"
-			"  InnoDB: Disabling trim for now.\n");
-		srv_use_trim = FALSE;
-	}
-#endif
-
 	if (!srv_use_trim) {
 		/* If persistent trims are not used we always write full
-		page */
+		page and end of the page needs to be initialized.*/
+		memset(out_buf+write_size, 0, len-write_size);
 		write_size = len;
 	}
 

storage/innobase/os/os0file.cc

@@ -6397,7 +6397,7 @@ os_file_trim(
 	}
 
 #ifdef __linux__
-#if defined(FALLOC_FL_PUNCH_HOLE) && defined (FALLOC_FL_KEEP_SIZE)
+#if defined(HAVE_POSIX_FALLOCATE)
 	int ret = fallocate(slot->file, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, trim_len);
 
 	if (ret) {
@@ -6435,7 +6435,7 @@ os_file_trim(
 		*slot->write_size = 0;
 	}
 
-#endif /* HAVE_FALLOCATE ... */
+#endif /* HAVE_POSIX_FALLOCATE ... */
 
 #elif defined(_WIN32)
 	FILE_LEVEL_TRIM flt;
@@ -6523,6 +6523,7 @@ os_slot_alloc_page_buf(
 	cbuf = static_cast<byte *>(ut_align(cbuf2, UNIV_PAGE_SIZE));
 	slot->page_compression_page = static_cast<byte *>(cbuf2);
 	slot->page_buf = static_cast<byte *>(cbuf);
+	memset(slot->page_buf, 0, UNIV_PAGE_SIZE);
 	ut_a(slot->page_buf != NULL);
 }
 
@@ -6538,6 +6539,7 @@ os_slot_alloc_lzo_mem(
 {
 	ut_a(slot != NULL);
 	slot->lzo_mem = static_cast<byte *>(ut_malloc(LZO1X_1_15_MEM_COMPRESS));
+	memset(slot->lzo_mem, 0, LZO1X_1_15_MEM_COMPRESS);
 	ut_a(slot->lzo_mem != NULL);
 }
 #endif

storage/xtradb/fil/fil0pagecompress.cc

@@ -453,11 +453,14 @@ fil_compress_page(
 
 	/* Actual write needs to be alligned on block size */
 	if (write_size % block_size) {
-#ifdef UNIV_DEBUG
 		size_t tmp = write_size;
+#ifdef UNIV_DEBUG
 		ut_a(block_size > 0);
 #endif
 		write_size =  (size_t)ut_uint64_align_up((ib_uint64_t)write_size, block_size);
+		/* Initialize rest of the written data to avoid
+		uninitialized bytes */
+		memset(out_buf+tmp, 0, write_size-tmp);
 #ifdef UNIV_DEBUG
 		ut_a(write_size > 0 && ((write_size % block_size) == 0));
 		ut_a(write_size >= tmp);
@@ -474,19 +477,10 @@ fil_compress_page(
 	srv_stats.page_compression_saved.add((len - write_size));
 	srv_stats.pages_page_compressed.inc();
 
-#if defined (__linux__) && (!defined(FALLOC_FL_PUNCH_HOLE) || !defined (FALLOC_FL_KEEP_SIZE))
-	if (srv_use_trim) {
-		ut_print_timestamp(stderr);
-		fprintf(stderr,
-			"  InnoDB: [Warning] System does not support FALLOC_FL_PUNCH_HOLE || FALLOC_FL_KEEP_SIZE.\n"
-			"  InnoDB: Disabling trim for now.\n");
-		srv_use_trim = FALSE;
-	}
-#endif
-
 	if (!srv_use_trim) {
 		/* If persistent trims are not used we always write full
-		page */
+		page and end of the page needs to be initialized.*/
+		memset(out_buf+write_size, 0, len-write_size);
 		write_size = len;
 	}
 

storage/xtradb/os/os0file.cc

@@ -6490,7 +6490,7 @@ os_file_trim(
 	}
 
 #ifdef __linux__
-#if defined(FALLOC_FL_PUNCH_HOLE) && defined (FALLOC_FL_KEEP_SIZE)
+#if defined(POSIX_FALLOCATE)
 	int ret = fallocate(slot->file, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, trim_len);
 
 	if (ret) {
@@ -6528,7 +6528,7 @@ os_file_trim(
 		*slot->write_size = 0;
 	}
 
-#endif /* HAVE_FALLOCATE ... */
+#endif /* HAVE_POSIX_FALLOCATE ... */
 
 #elif defined(_WIN32)
 	FILE_LEVEL_TRIM flt;
@@ -6615,6 +6615,7 @@ os_slot_alloc_page_buf(
 	cbuf = static_cast<byte *>(ut_align(cbuf2, UNIV_PAGE_SIZE));
 	slot->page_compression_page = static_cast<byte *>(cbuf2);
 	slot->page_buf = static_cast<byte *>(cbuf);
+	memset(slot->page_buf, 0, UNIV_PAGE_SIZE);
 	ut_a(slot->page_buf != NULL);
 }
 
@@ -6630,6 +6631,7 @@ os_slot_alloc_lzo_mem(
 {
 	ut_a(slot != NULL);
 	slot->lzo_mem = static_cast<byte *>(ut_malloc(LZO1X_1_15_MEM_COMPRESS));
+	memset(slot->lzo_mem, 0, LZO1X_1_15_MEM_COMPRESS);
 	ut_a(slot->lzo_mem != NULL);
 }
 #endif