diff mbox series

[06/13] flex-array: warn on flexible arrays in unions

Message ID 20200930231828.66751-7-luc.vanoostenryck@gmail.com (mailing list archive)
State Mainlined, archived
Headers show
Series add warnings for flexible arrays | expand

Commit Message

Luc Van Oostenryck Sept. 30, 2020, 11:18 p.m. UTC 
Flexible array members are not allowed in unions.
So, warn if one is present.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 symbol.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/symbol.c b/symbol.c
index 6633e89de4a9..e578b1a840a3 100644
--- a/symbol.c
+++ b/symbol.c
@@ -95,6 +95,9 @@  struct struct_union_info {
  */
 static void lay_out_union(struct symbol *sym, struct struct_union_info *info)
 {
+	if (sym->bit_size < 0 && is_array_type(sym))
+		sparse_error(sym->pos, "flexible array member '%s' in a union", show_ident(sym->ident));
+
 	if (sym->bit_size > info->bit_size)
 		info->bit_size = sym->bit_size;