1 // RUN: clang -fsyntax-only -verify %s 2 3 // Define this to get vasprintf on Linux 4 #define _GNU_SOURCE 5 6 #include <stdio.h> 7 #include <stdarg.h> 8 9 char * global_fmt; 10 11 void check_string_literal( FILE* fp, const char* s, char *buf, ... ) { 12 13 char * b; 14 va_list ap; 15 va_start(ap,buf); 16 17 printf(s); // expected-warning {{format string is not a string literal}} 18 vprintf(s,ap); // // no-warning 19 fprintf(fp,s); // expected-warning {{format string is not a string literal}} 20 vfprintf(fp,s,ap); // no-warning 21 asprintf(&b,s); // expected-warning {{format string is not a string lit}} 22 vasprintf(&b,s,ap); // no-warning 23 sprintf(buf,s); // expected-warning {{format string is not a string literal}} 24 snprintf(buf,2,s); // expected-warning {{format string is not a string lit}} 25 vsprintf(buf,s,ap); // no-warning 26 vsnprintf(buf,2,s,ap); // no-warning 27 vsnprintf(buf,2,global_fmt,ap); // expected-warning {{format string is not a string literal}} 28 } 29 30 void check_writeback_specifier() 31 { 32 int x; 33 char *b; 34 35 printf("%n",&x); // expected-warning {{'%n' in format string discouraged}} 36 sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}} 37 } 38 39 void check_invalid_specifier(FILE* fp, char *buf) 40 { 41 printf("%s%lb%d","unix",10,20); // expected-warning {{lid conversion '%lb'}} 42 fprintf(fp,"%%%l"); // expected-warning {{lid conversion '%l'}} 43 sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // no-warning 44 snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning {{sion '%;'}} 45 } 46 47 void check_null_char_string(char* b) 48 { 49 printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}} 50 snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}} 51 printf("%\0d",1); // expected-warning {{string contains '\0'}} 52 } 53 54 void check_empty_format_string(char* buf, ...) 55 { 56 va_list ap; 57 va_start(ap,buf); 58 vprintf("",ap); // expected-warning {{format string is empty}} 59 sprintf(buf,""); // expected-warning {{format string is empty}} 60 } 61 62 void check_wide_string(char* b, ...) 63 { 64 va_list ap; 65 va_start(ap,b); 66 67 printf(L"foo %d",2); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} 68 vasprintf(&b,L"bar %d",ap); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} 69 } 70 71 void check_asterisk_precision_width(int x) { 72 printf("%*d"); // expected-warning {{'*' specified field width is missing a matching 'int' argument}} 73 printf("%.*d"); // expected-warning {{'.*' specified field precision is missing a matching 'int' argument}} 74 printf("%*d",12,x); // no-warning 75 printf("%*d","foo",x); // expected-warning {{field width should have type 'int', but argument has type 'char *'}} 76 printf("%.*d","foo",x); // expected-warning {{field precision should have type 'int', but argument has type 'char *'}} 77 } 78