// RUN: %clang_cc1 -fsyntax-only -verify -Wformat-nonliteral %s
#include <stdarg.h>
typedef __typeof(sizeof(int)) size_t;
typedef struct _FILE FILE;
int fprintf(FILE *, const char *restrict, ...);
int printf(const char *restrict, ...);
int snprintf(char *restrict, size_t, const char *restrict, ...);
int sprintf(char *restrict, const char *restrict, ...);
int vasprintf(char **, const char *, va_list);
int asprintf(char **, const char *, ...);
int vfprintf(FILE *, const char *restrict, va_list);
int vprintf(const char *restrict, va_list);
int vsnprintf(char *, size_t, const char *, va_list);
int vsprintf(char *restrict, const char *restrict, va_list);
char * global_fmt;
void check_string_literal( FILE* fp, const char* s, char *buf, ... ) {
char * b;
va_list ap;
va_start(ap,buf);
printf(s); // expected-warning {{format string is not a string literal}}
vprintf(s,ap); // // no-warning
fprintf(fp,s); // expected-warning {{format string is not a string literal}}
vfprintf(fp,s,ap); // no-warning
asprintf(&b,s); // expected-warning {{format string is not a string lit}}
vasprintf(&b,s,ap); // no-warning
sprintf(buf,s); // expected-warning {{format string is not a string literal}}
snprintf(buf,2,s); // expected-warning {{format string is not a string lit}}
__builtin___sprintf_chk(buf,0,-1,s); // expected-warning {{format string is not a string literal}}
__builtin___snprintf_chk(buf,2,0,-1,s); // expected-warning {{format string is not a string lit}}
vsprintf(buf,s,ap); // no-warning
vsnprintf(buf,2,s,ap); // no-warning
vsnprintf(buf,2,global_fmt,ap); // expected-warning {{format string is not a string literal}}
__builtin___vsnprintf_chk(buf,2,0,-1,s,ap); // no-warning
__builtin___vsnprintf_chk(buf,2,0,-1,global_fmt,ap); // expected-warning {{format string is not a string literal}}
// rdar://6079877
printf("abc"
"%*d", 1, 1); // no-warning
printf("abc\
def"
"%*d", 1, 1); // no-warning
// <rdar://problem/6079850>, allow 'unsigned' (instead of 'int') to be used for both
// the field width and precision. This deviates from C99, but is reasonably safe
// and is also accepted by GCC.
printf("%*d", (unsigned) 1, 1); // no-warning
}
void check_conditional_literal(const char* s, int i) {
printf(i == 1 ? "yes" : "no"); // no-warning
printf(i == 0 ? (i == 1 ? "yes" : "no") : "dont know"); // no-warning
printf(i == 0 ? (i == 1 ? s : "no") : "dont know"); // expected-warning{{format string is not a string literal}}
printf("yes" ?: "no %d", 1); // expected-warning{{more data arguments than format specifiers}}
}
void check_writeback_specifier()
{
int x;
char *b;
printf("%n",&x); // expected-warning {{'%n' in format string discouraged}}
sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}}
}
void check_invalid_specifier(FILE* fp, char *buf)
{
printf("%s%lb%d","unix",10,20); // expected-warning {{invalid conversion specifier 'b'}}
fprintf(fp,"%%%l"); // expected-warning {{incomplete format specifier}}
sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // expected-warning{{conversion specifies type 'long' but the argument has type 'int'}}
snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning{{conversion specifies type 'long' but the argument has type 'int'}} expected-warning {{invalid conversion specifier ';'}}
}
void check_null_char_string(char* b)
{
printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}}
snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}}
printf("%\0d",1); // expected-warning {{string contains '\0'}}
}
void check_empty_format_string(char* buf, ...)
{
va_list ap;
va_start(ap,buf);
vprintf("",ap); // expected-warning {{format string is empty}}
sprintf(buf,""); // expected-warning {{format string is empty}}
}
void check_wide_string(char* b, ...)
{
va_list ap;
va_start(ap,b);
printf(L"foo %d",2); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}}
vsprintf(b,L"bar %d",ap); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}}
}
void check_asterisk_precision_width(int x) {
printf("%*d"); // expected-warning {{'*' specified field width is missing a matching 'int' argument}}
printf("%.*d"); // expected-warning {{'.*' specified field precision is missing a matching 'int' argument}}
printf("%*d",12,x); // no-warning
printf("%*d","foo",x); // expected-warning {{field width should have type 'int', but argument has type 'char *'}}
printf("%.*d","foo",x); // expected-warning {{field precision should have type 'int', but argument has type 'char *'}}
}
void __attribute__((format(printf,1,3))) myprintf(const char*, int blah, ...);
void test_myprintf() {
myprintf("%d", 17, 18); // okay
}
void test_constant_bindings(void) {
const char * const s1 = "hello";
const char s2[] = "hello";
const char *s3 = "hello";
char * const s4 = "hello";
extern const char s5[];
printf(s1); // no-warning
printf(s2); // no-warning
printf(s3); // expected-warning{{not a string literal}}
printf(s4); // expected-warning{{not a string literal}}
printf(s5); // expected-warning{{not a string literal}}
}
// Test what happens when -Wformat-security only.
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#pragma GCC diagnostic warning "-Wformat-security"
void test9(char *P) {
int x;
printf(P); // expected-warning {{format string is not a string literal (potentially insecure)}}
printf(P, 42);
printf("%n", &x); // expected-warning {{use of '%n' in format string discouraged }}
}
void torture(va_list v8) {
vprintf ("%*.*d", v8); // no-warning
}
void test10(int x, float f, int i, long long lli) {
printf("%@", 12); // expected-warning{{invalid conversion specifier '@'}}
printf("\0"); // expected-warning{{format string contains '\0' within the string body}}
printf("xs\0"); // expected-warning{{format string contains '\0' within the string body}}
printf("%*d\n"); // expected-warning{{'*' specified field width is missing a matching 'int' argument}}
printf("%*.*d\n", x); // expected-warning{{'.*' specified field precision is missing a matching 'int' argument}}
printf("%*d\n", f, x); // expected-warning{{field width should have type 'int', but argument has type 'double'}}
printf("%*.*d\n", x, f, x); // expected-warning{{field precision should have type 'int', but argument has type 'double'}}
printf("%**\n"); // expected-warning{{invalid conversion specifier '*'}}
printf("%n", &i); // expected-warning{{use of '%n' in format string discouraged (potentially insecure)}}
printf("%d%d\n", x); // expected-warning{{more '%' conversions than data arguments}}
printf("%d\n", x, x); // expected-warning{{more data arguments than format specifiers}}
printf("%W%d%Z\n", x, x, x); // expected-warning{{invalid conversion specifier 'W'}} expected-warning{{invalid conversion specifier 'Z'}}
printf("%"); // expected-warning{{incomplete format specifier}}
printf("%.d", x); // no-warning
printf("%.", x); // expected-warning{{incomplete format specifier}}
printf("%f", 4); // expected-warning{{conversion specifies type 'double' but the argument has type 'int'}}
printf("%qd", lli);
printf("hhX %hhX", (unsigned char)10); // no-warning
printf("llX %llX", (long long) 10); // no-warning
// This is fine, because there is an implicit conversion to an int.
printf("%d", (unsigned char) 10); // no-warning
printf("%d", (long long) 10); // expected-warning{{conversion specifies type 'int' but the argument has type 'long long'}}
printf("%Lf\n", (long double) 1.0); // no-warning
printf("%f\n", (long double) 1.0); // expected-warning{{conversion specifies type 'double' but the argument has type 'long double'}}
}
void test11(void *p, char *s) {
printf("%p", p); // no-warning
printf("%.4p", p); // expected-warning{{precision used in 'p' conversion specifier (where it has no meaning)}}
printf("%+p", p); // expected-warning{{flag '+' results in undefined behavior in 'p' conversion specifier}}
printf("% p", p); // expected-warning{{flag ' ' results in undefined behavior in 'p' conversion specifier}}
printf("%0p", p); // expected-warning{{flag '0' results in undefined behavior in 'p' conversion specifier}}
printf("%s", s); // no-warning
printf("%+s", p); // expected-warning{{flag '+' results in undefined behavior in 's' conversion specifier}}
printf("% s", p); // expected-warning{{flag ' ' results in undefined behavior in 's' conversion specifier}}
printf("%0s", p); // expected-warning{{flag '0' results in undefined behavior in 's' conversion specifier}}
}
void test12(char *b) {
unsigned char buf[4];
printf ("%.4s\n", buf); // no-warning
printf ("%.4s\n", &buf); // expected-warning{{conversion specifies type 'char *' but the argument has type 'unsigned char (*)[4]'}}
// Verify that we are checking asprintf
asprintf(&b, "%d", "asprintf"); // expected-warning{{conversion specifies type 'int' but the argument has type 'char *'}}
}
typedef struct __aslclient *aslclient;
typedef struct __aslmsg *aslmsg;
int asl_log(aslclient asl, aslmsg msg, int level, const char *format, ...) __attribute__((__format__ (__printf__, 4, 5)));
void test_asl(aslclient asl) {
// Test case from <rdar://problem/7341605>.
asl_log(asl, 0, 3, "Error: %m"); // no-warning
asl_log(asl, 0, 3, "Error: %W"); // expected-warning{{invalid conversion specifier 'W'}}
}
// <rdar://problem/7595366>
typedef enum { A } int_t;
void f0(int_t x) { printf("%d\n", x); }
