1 // RUN: clang -fsyntax-only -verify %s 2 3 #include <stdio.h> 4 #include <stdarg.h> 5 6 void check_string_literal( FILE* fp, const char* s, char *buf, ... ) { 7 8 char * b; 9 va_list ap; 10 va_start(ap,buf); 11 12 printf(s); // expected-warning {{format string is not a string literal}} 13 vprintf(s,ap); // expected-warning {{format string is not a string liter}} 14 fprintf(fp,s); // expected-warning {{format string is not a string literal}} 15 vfprintf(fp,s,ap); // expected-warning {{format string is not a string lit}} 16 asprintf(&b,s); // expected-warning {{format string is not a string lit}} 17 vasprintf(&b,s,ap); // expected-warning {{format string is not a string lit}} 18 sprintf(buf,s); // expected-warning {{format string is not a string literal}} 19 snprintf(buf,2,s); // expected-warning {{format string is not a string lit}} 20 vsprintf(buf,s,ap); // expected-warning {{format string is not a string lit}} 21 vsnprintf(buf,2,s,ap); // expected-warning {{mat string is not a string lit}} 22 } 23 24 void check_writeback_specifier() 25 { 26 int x; 27 char *b; 28 29 printf("%n",&x); // expected-warning {{'%n' in format string discouraged}} 30 sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}} 31 } 32 33 void check_invalid_specifier(FILE* fp, char *buf) 34 { 35 printf("%s%lb%d","unix",10,20); // expected-warning {{lid conversion '%lb'}} 36 fprintf(fp,"%%%l"); // expected-warning {{lid conversion '%l'}} 37 sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // no-warning 38 snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning {{sion '%;'}} 39 } 40 41 void check_null_char_string(char* b) 42 { 43 printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}} 44 snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}} 45 printf("%\0d",1); // expected-warning {{string contains '\0'}} 46 } 47 48 void check_empty_format_string(char* buf, ...) 49 { 50 va_list ap; 51 va_start(ap,buf); 52 vprintf("",ap); // expected-warning {{format string is empty}} 53 sprintf(buf,""); // expected-warning {{format string is empty}} 54 } 55 56 void check_wide_string(char* b, ...) 57 { 58 va_list ap; 59 va_start(ap,b); 60 61 printf(L"foo %d",2); // expected-warning {{should not be a wide string}} 62 vasprintf(&b,L"bar %d",ap); // expected-warning {{should not be a wide string}} 63 } 64 65 void check_asterisk_precision_width(int x) { 66 printf("%*d"); // expected-warning {{'*' specified field width is missing a matching 'int' argument}} 67 printf("%.*d"); // expected-warning {{'.*' specified field precision is missing a matching 'int' argument}} 68 printf("%*d",12,x); // no-warning 69 printf("%*d","foo",x); // expected-warning {{field width should have type 'int', but argument has type 'char *'}} 70 printf("%.*d","foo",x); // expected-warning {{field precision should have type 'int', but argument has type 'char *'}} 71 }