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