| /* Test for format attributes: test bad uses of __attribute__. */ |
| /* Origin: Joseph Myers <jsm28@cam.ac.uk> */ |
| /* { dg-do compile } */ |
| /* { dg-options "-std=gnu99 -Wformat" } */ |
| |
| #include "format.h" |
| |
| /* Proper uses of the attributes. */ |
| extern void fa0 (const char *, ...) __attribute__((format(printf, 1, 2))); |
| extern void fa1 (char *, ...) __attribute__((format(printf, 1, 2))); |
| extern char *fa2 (const char *) __attribute__((format_arg(1))); |
| extern char *fa3 (char *) __attribute__((format_arg(1))); |
| |
| /* Uses with too few or too many arguments. */ |
| extern void fb0 (const char *, ...) __attribute__((format)); /* { dg-error "wrong number of arguments" "bad format" } */ |
| extern void fb1 (const char *, ...) __attribute__((format())); /* { dg-error "wrong number of arguments" "bad format" } */ |
| extern void fb2 (const char *, ...) __attribute__((format(printf))); /* { dg-error "wrong number of arguments" "bad format" } */ |
| extern void fb3 (const char *, ...) __attribute__((format(printf, 1))); /* { dg-error "wrong number of arguments" "bad format" } */ |
| extern void fb4 (const char *, ...) __attribute__((format(printf, 1, 2, 3))); /* { dg-error "wrong number of arguments" "bad format" } */ |
| |
| extern void fc1 (const char *) __attribute__((format_arg)); /* { dg-error "wrong number of arguments" "bad format_arg" } */ |
| extern void fc2 (const char *) __attribute__((format_arg())); /* { dg-error "wrong number of arguments" "bad format_arg" } */ |
| extern void fc3 (const char *) __attribute__((format_arg(1, 2))); /* { dg-error "wrong number of arguments" "bad format_arg" } */ |
| |
| /* These attributes presently only apply to declarations, not to types. |
| Eventually, they should be usable with declarators for function types |
| anywhere, but still not with structure/union/enum types. */ |
| struct s0 { int i; } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on struct" } */ |
| union u0 { int i; } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on union" } */ |
| enum e0 { E0V0 } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on enum" } */ |
| |
| struct s1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on struct" } */ |
| union u1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on union" } */ |
| enum e1 { E1V0 } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on enum" } */ |
| |
| /* The format type must be an identifier, one of those recognized. */ |
| extern void fe0 (const char *, ...) __attribute__((format(12345, 1, 2))); /* { dg-error "format specifier" "non-id format" } */ |
| extern void fe1 (const char *, ...) __attribute__((format(nosuch, 1, 2))); /* { dg-warning "format function type" "unknown format" } */ |
| |
| /* Both the numbers must be integer constant expressions. */ |
| extern void ff0 (const char *, ...) __attribute__((format(printf, 3-2, (long long)(10/5)))); |
| int foo; |
| extern void ff1 (const char *, ...) __attribute__((format(printf, foo, 10/5))); /* { dg-error "invalid operand" "bad number" } */ |
| extern void ff2 (const char *, ...) __attribute__((format(printf, 3-2, foo))); /* { dg-error "invalid operand" "bad number" } */ |
| extern char *ff3 (const char *) __attribute__((format_arg(3-2))); |
| extern char *ff4 (const char *) __attribute__((format_arg(foo))); /* { dg-error "invalid operand" "bad format_arg number" } */ |
| |
| /* The format string argument must precede the arguments to be formatted. |
| This includes if no parameter types are specified (which is not valid ISO |
| C for variadic functions). */ |
| extern void fg0 () __attribute__((format(printf, 1, 2))); |
| extern void fg1 () __attribute__((format(printf, 1, 0))); |
| extern void fg2 () __attribute__((format(printf, 1, 1))); /* { dg-error "follows" "bad number order" } */ |
| extern void fg3 () __attribute__((format(printf, 2, 1))); /* { dg-error "follows" "bad number order" } */ |
| |
| /* The format string argument must be a string type, and the arguments to |
| be formatted must be the "...". */ |
| extern void fh0 (int, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "format int string" } */ |
| extern void fh1 (signed char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "signed char string" } */ |
| extern void fh2 (unsigned char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "unsigned char string" } */ |
| extern void fh3 (const char *, ...) __attribute__((format(printf, 1, 3))); /* { dg-error "is not" "not ..." } */ |
| extern void fh4 (const char *, int, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "is not" "not ..." } */ |
| |
| /* format_arg formats must take and return a string. */ |
| extern char *fi0 (int) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg int string" } */ |
| extern char *fi1 (signed char *) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg signed char string" } */ |
| extern char *fi2 (unsigned char *) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg unsigned char string" } */ |
| extern int fi3 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret int string" } */ |
| extern signed char *fi4 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret signed char string" } */ |
| extern unsigned char *fi5 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret unsigned char string" } */ |