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 __builtin___sprintf_chk(buf,0,-1,s); // expected-warning {{format string is not a string literal}} 26 __builtin___snprintf_chk(buf,2,0,-1,s); // expected-warning {{format string is not a string lit}} 27 vsprintf(buf,s,ap); // no-warning 28 vsnprintf(buf,2,s,ap); // no-warning 29 vsnprintf(buf,2,global_fmt,ap); // expected-warning {{format string is not a string literal}} 30 __builtin___vsnprintf_chk(buf,2,0,-1,s,ap); // no-warning 31 __builtin___vsnprintf_chk(buf,2,0,-1,global_fmt,ap); // expected-warning {{format string is not a string literal}} 32 } 33 34 void check_conditional_literal(const char* s, int i) { 35 printf(i == 1 ? "yes" : "no"); // no-warning 36 printf(i == 0 ? (i == 1 ? "yes" : "no") : "dont know"); // no-warning 37 printf(i == 0 ? (i == 1 ? s : "no") : "dont know"); // expected-warning 38 } 39 40 void check_writeback_specifier() 41 { 42 int x; 43 char *b; 44 45 printf("%n",&x); // expected-warning {{'%n' in format string discouraged}} 46 sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}} 47 } 48 49 void check_invalid_specifier(FILE* fp, char *buf) 50 { 51 printf("%s%lb%d","unix",10,20); // expected-warning {{lid conversion '%lb'}} 52 fprintf(fp,"%%%l"); // expected-warning {{lid conversion '%l'}} 53 sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // no-warning 54 snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning {{sion '%;'}} 55 } 56 57 void check_null_char_string(char* b) 58 { 59 printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}} 60 snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}} 61 printf("%\0d",1); // expected-warning {{string contains '\0'}} 62 } 63 64 void check_empty_format_string(char* buf, ...) 65 { 66 va_list ap; 67 va_start(ap,buf); 68 vprintf("",ap); // expected-warning {{format string is empty}} 69 sprintf(buf,""); // expected-warning {{format string is empty}} 70 } 71 72 void check_wide_string(char* b, ...) 73 { 74 va_list ap; 75 va_start(ap,b); 76 77 printf(L"foo %d",2); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} 78 vasprintf(&b,L"bar %d",ap); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} 79 } 80 81 void check_asterisk_precision_width(int x) { 82 printf("%*d"); // expected-warning {{'*' specified field width is missing a matching 'int' argument}} 83 printf("%.*d"); // expected-warning {{'.*' specified field precision is missing a matching 'int' argument}} 84 printf("%*d",12,x); // no-warning 85 printf("%*d","foo",x); // expected-warning {{field width should have type 'int', but argument has type 'char *'}} 86 printf("%.*d","foo",x); // expected-warning {{field precision should have type 'int', but argument has type 'char *'}} 87 } 88