1 /* Test for format attributes: test bad uses of __attribute__. */
2 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
3 /* { dg-do compile } */
4 /* { dg-options "-std=gnu99 -Wformat" } */
5
6 #define DONT_GNU_PROTOTYPE
7 #include "format.h"
8
9 /* Proper uses of the attributes. */
10 extern void fa0 (const char *, ...) __attribute__((format(gnu_attr_printf, 1, 2)));
11 extern void fa1 (char *, ...) __attribute__((format(gnu_attr_printf, 1, 2)));
12 extern char *fa2 (const char *) __attribute__((format_arg(1)));
13 extern char *fa3 (char *) __attribute__((format_arg(1)));
14
15 /* Uses with too few or too many arguments. */
16 extern void fb0 (const char *, ...) __attribute__((format)); /* { dg-error "wrong number of arguments" "bad format" } */
17 extern void fb1 (const char *, ...) __attribute__((format())); /* { dg-error "wrong number of arguments" "bad format" } */
18 extern void fb2 (const char *, ...) __attribute__((format(gnu_attr_printf))); /* { dg-error "wrong number of arguments" "bad format" } */
19 extern void fb3 (const char *, ...) __attribute__((format(gnu_attr_printf, 1))); /* { dg-error "wrong number of arguments" "bad format" } */
20 extern void fb4 (const char *, ...) __attribute__((format(gnu_attr_printf, 1, 2, 3))); /* { dg-error "wrong number of arguments" "bad format" } */
21
22 extern void fc1 (const char *) __attribute__((format_arg)); /* { dg-error "wrong number of arguments" "bad format_arg" } */
23 extern void fc2 (const char *) __attribute__((format_arg())); /* { dg-error "wrong number of arguments" "bad format_arg" } */
24 extern void fc3 (const char *) __attribute__((format_arg(1, 2))); /* { dg-error "wrong number of arguments" "bad format_arg" } */
25
26 /* These attributes presently only apply to declarations, not to types.
27 Eventually, they should be usable with declarators for function types
28 anywhere, but still not with structure/union/enum types. */
29 struct s0 { int i; } __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on struct" } */
30 union u0 { int i; } __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on union" } */
31 enum e0 { E0V0 } __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on enum" } */
32
33 struct s1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on struct" } */
34 union u1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on union" } */
35 enum e1 { E1V0 } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on enum" } */
36
37 /* The format type must be an identifier, one of those recognized. */
38 extern void fe0 (const char *, ...) __attribute__((format(12345, 1, 2))); /* { dg-error "format specifier" "non-id format" } */
39 extern void fe1 (const char *, ...) __attribute__((format(nosuch, 1, 2))); /* { dg-warning "format function type" "unknown format" } */
40
41 /* Both the numbers must be integer constant expressions. */
42 extern void ff0 (const char *, ...) __attribute__((format(gnu_attr_printf, 3-2, (long long)(10/5))));
43 int foo;
44 extern void ff1 (const char *, ...) __attribute__((format(gnu_attr_printf, foo, 10/5))); /* { dg-warning ".format. attribute argument 2 value .foo. is not an integer constant" "bad number" } */
45 extern void ff2 (const char *, ...) __attribute__((format(gnu_attr_printf, 3-2, foo))); /* { dg-warning ".format. attribute argument 3 value .foo. is not an integer constant" "bad number" } */
46 extern char *ff3 (const char *) __attribute__((format_arg(3-2)));
47 extern char *ff4 (const char *) __attribute__((format_arg(foo))); /* { dg-warning ".format_arg. attribute argument value .foo. is not an integer constant" "bad format_arg number" } */
48
49 /* The format string argument must precede the arguments to be formatted.
50 This includes if no parameter types are specified (which is not valid ISO
51 C for variadic functions). */
52 extern void fg0 () __attribute__((format(gnu_attr_printf, 1, 2)));
53 extern void fg1 () __attribute__((format(gnu_attr_printf, 1, 0)));
54 extern void fg2 () __attribute__((format(gnu_attr_printf, 1, 1))); /* { dg-error "follows" "bad number order" } */
55 extern void fg3 () __attribute__((format(gnu_attr_printf, 2, 1))); /* { dg-error "follows" "bad number order" } */
56
57 /* The format string argument must be a string type, and the arguments to
58 be formatted must be the "...". */
59 extern void fh0 (int, ...) __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error ".format. attribute argument 2 value .1. refers to parameter type .int." "format int string" } */
60 extern void fh1 (signed char *, ...) __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error ".format. attribute argument 2 value .1. refers to parameter type .signed char \\\*." "signed char string" } */
61 extern void fh2 (unsigned char *, ...) __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error ".format. attribute argument 2 value .1. refers to parameter type .unsigned char \\\*." "unsigned char string" } */
62 extern void fh3 (const char *, ...) __attribute__((format(gnu_attr_printf, 1, 3))); /* { dg-error "is not" "not ..." } */
63 extern void fh4 (const char *, int, ...) __attribute__((format(gnu_attr_printf, 1, 2))); /* { dg-error ".format. attribute argument 3 value .2. does not refer to a variable argument list" "not ..." } */
64
65 /* format_arg formats must take and return a string. */
66 extern char *fi0 (int) __attribute__((format_arg(1))); /* { dg-error ".format_arg. attribute argument value .1. refers to parameter type .int." } */
67 extern char *fi1 (signed char *) __attribute__((format_arg(1))); /* { dg-error ".format_arg. attribute argument value .1. refers to parameter type .signed char \\\*." "format_arg signed char string" } */
68 extern char *fi2 (unsigned char *) __attribute__((format_arg(1))); /* { dg-error ".format_arg. attribute argument value .1. refers to parameter type .unsigned char \\\*." "format_arg unsigned char string" } */
69 extern int fi3 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret int string" } */
70 extern signed char *fi4 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret signed char string" } */
71 extern unsigned char *fi5 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret unsigned char string" } */