tdb2: avoid writing uninitialized bytes in test/layout.c

ccan/tdb2/test/layout.c

@@ -252,6 +252,8 @@ struct tdb_context *tdb_layout_get(struct tdb_layout *layout)
 	}
 
 	mem = malloc(off);
+	/* Fill with some weird pattern. */
+	memset(mem, 0x99, off);
 	/* Now populate our header, cribbing from a real TDB header. */
 	tdb = tdb_open(NULL, TDB_INTERNAL, O_RDWR, 0, &tap_log_attr);
 	memcpy(mem, tdb->map_ptr, sizeof(struct tdb_header));

ccan/tdb2/test/run-03-coalesce.c

@@ -39,7 +39,7 @@ int main(int argc, char *argv[])
 	key.dsize = 5;
 
 	/* No coalescing can be done due to EOF */
-	layout = new_tdb_layout(NULL);
+	layout = new_tdb_layout("run-03-coalesce.tdb");
 	tdb_layout_add_freetable(layout);
 	len = 1024;
 	tdb_layout_add_free(layout, len, 0);
@@ -59,7 +59,7 @@ int main(int argc, char *argv[])
 	tdb_layout_free(layout);
 
 	/* No coalescing can be done due to used record */
-	layout = new_tdb_layout(NULL);
+	layout = new_tdb_layout("run-03-coalesce.tdb");
 	tdb_layout_add_freetable(layout);
 	tdb_layout_add_free(layout, 1024, 0);
 	tdb_layout_add_used(layout, key, data, 6);
@@ -79,7 +79,7 @@ int main(int argc, char *argv[])
 	tdb_layout_free(layout);
 
 	/* Coalescing can be done due to two free records, then EOF */
-	layout = new_tdb_layout(NULL);
+	layout = new_tdb_layout("run-03-coalesce.tdb");
 	tdb_layout_add_freetable(layout);
 	tdb_layout_add_free(layout, 1024, 0);
 	tdb_layout_add_free(layout, 2048, 0);
@@ -101,7 +101,7 @@ int main(int argc, char *argv[])
 	tdb_layout_free(layout);
 
 	/* Coalescing can be done due to two free records, then data */
-	layout = new_tdb_layout(NULL);
+	layout = new_tdb_layout("run-03-coalesce.tdb");
 	tdb_layout_add_freetable(layout);
 	tdb_layout_add_free(layout, 1024, 0);
 	tdb_layout_add_free(layout, 512, 0);
@@ -124,7 +124,7 @@ int main(int argc, char *argv[])
 	tdb_layout_free(layout);
 
 	/* Coalescing can be done due to three free records, then EOF */
-	layout = new_tdb_layout(NULL);
+	layout = new_tdb_layout("run-03-coalesce.tdb");
 	tdb_layout_add_freetable(layout);
 	tdb_layout_add_free(layout, 1024, 0);
 	tdb_layout_add_free(layout, 512, 0);