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 printf("abc" 34 "%*d", (unsigned) 1, 1); // expected-warning {{field width should have type 'int'}} 35 } 36 37 void check_conditional_literal(const char* s, int i) { 38 printf(i == 1 ? "yes" : "no"); // no-warning 39 printf(i == 0 ? (i == 1 ? "yes" : "no") : "dont know"); // no-warning 40 printf(i == 0 ? (i == 1 ? s : "no") : "dont know"); // expected-warning{{format string is not a string literal}} 41 } 42 43 void check_writeback_specifier() 44 { 45 int x; 46 char *b; 47 48 printf("%n",&x); // expected-warning {{'%n' in format string discouraged}} 49 sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}} 50 } 51 52 void check_invalid_specifier(FILE* fp, char *buf) 53 { 54 printf("%s%lb%d","unix",10,20); // expected-warning {{lid conversion '%lb'}} 55 fprintf(fp,"%%%l"); // expected-warning {{lid conversion '%l'}} 56 sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // no-warning 57 snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning {{sion '%;'}} 58 } 59 60 void check_null_char_string(char* b) 61 { 62 printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}} 63 snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}} 64 printf("%\0d",1); // expected-warning {{string contains '\0'}} 65 } 66 67 void check_empty_format_string(char* buf, ...) 68 { 69 va_list ap; 70 va_start(ap,buf); 71 vprintf("",ap); // expected-warning {{format string is empty}} 72 sprintf(buf,""); // expected-warning {{format string is empty}} 73 } 74 75 void check_wide_string(char* b, ...) 76 { 77 va_list ap; 78 va_start(ap,b); 79 80 printf(L"foo %d",2); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} 81 vasprintf(&b,L"bar %d",ap); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} 82 } 83 84 void check_asterisk_precision_width(int x) { 85 printf("%*d"); // expected-warning {{'*' specified field width is missing a matching 'int' argument}} 86 printf("%.*d"); // expected-warning {{'.*' specified field precision is missing a matching 'int' argument}} 87 printf("%*d",12,x); // no-warning 88 printf("%*d","foo",x); // expected-warning {{field width should have type 'int', but argument has type 'char *'}} 89 printf("%.*d","foo",x); // expected-warning {{field precision should have type 'int', but argument has type 'char *'}} 90 } 91 92 void __attribute__((format(printf,1,3))) myprintf(const char*, int blah, ...); 93 94 void test_myprintf() { 95 myprintf("%d", 17, 18); // okay 96 } 97