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