1 /* Test for some aspects of null format string handling. */
2 /* Origin: Jason Thorpe <thorpej@wasabisystems.com> */
3 /* { dg-do compile } */
4 /* { dg-options "-std=gnu99 -Wformat" } */
5
6 #define DONT_GNU_PROTOTYPE
7 #include "format.h"
8
9 extern void my_printf (const char *, ...) __attribute__((format(gnu_attr_printf,1,2)));
10 extern const char *my_format (const char *, const char *)
11 __attribute__((format_arg(2)));
12
13 void
foo(int i1)14 foo (int i1)
15 {
16 /* Warning about a null format string has been decoupled from the actual
17 format check. However, we still expect to be warned about any excess
18 arguments after a null format string. */
19 my_printf (NULL);
20 my_printf (NULL, i1); /* { dg-warning "too many" "null format with arguments" } */
21
22 my_printf (my_format ("", NULL));
23 my_printf (my_format ("", NULL), i1); /* { dg-warning "too many" "null format_arg with arguments" } */
24
25 /* While my_printf allows a null argument, dgettext does not, so we expect
26 a null argument warning here. */
27 my_printf (dgettext ("", NULL)); /* { dg-warning "null" "null format with dgettext" } */
28 }
29