| // RUN: clang -fsyntax-only -verify %s |
| |
| // Define this to get vasprintf on Linux |
| #define _GNU_SOURCE |
| |
| #include <stdio.h> |
| #include <stdarg.h> |
| |
| char * global_fmt; |
| |
| void check_string_literal( FILE* fp, const char* s, char *buf, ... ) { |
| |
| char * b; |
| va_list ap; |
| va_start(ap,buf); |
| |
| printf(s); // expected-warning {{format string is not a string literal}} |
| vprintf(s,ap); // // no-warning |
| fprintf(fp,s); // expected-warning {{format string is not a string literal}} |
| vfprintf(fp,s,ap); // no-warning |
| asprintf(&b,s); // expected-warning {{format string is not a string lit}} |
| vasprintf(&b,s,ap); // no-warning |
| sprintf(buf,s); // expected-warning {{format string is not a string literal}} |
| snprintf(buf,2,s); // expected-warning {{format string is not a string lit}} |
| __builtin___sprintf_chk(buf,0,-1,s); // expected-warning {{format string is not a string literal}} |
| __builtin___snprintf_chk(buf,2,0,-1,s); // expected-warning {{format string is not a string lit}} |
| vsprintf(buf,s,ap); // no-warning |
| vsnprintf(buf,2,s,ap); // no-warning |
| vsnprintf(buf,2,global_fmt,ap); // expected-warning {{format string is not a string literal}} |
| __builtin___vsnprintf_chk(buf,2,0,-1,s,ap); // no-warning |
| __builtin___vsnprintf_chk(buf,2,0,-1,global_fmt,ap); // expected-warning {{format string is not a string literal}} |
| |
| // rdar://6079877 |
| printf("abc" |
| "%*d", (unsigned) 1, 1); // expected-warning {{field width should have type 'int'}} |
| printf("abc\ |
| def" |
| "%*d", (unsigned) 1, 1); // expected-warning {{field width should have type 'int'}} |
| |
| } |
| |
| void check_conditional_literal(const char* s, int i) { |
| printf(i == 1 ? "yes" : "no"); // no-warning |
| printf(i == 0 ? (i == 1 ? "yes" : "no") : "dont know"); // no-warning |
| printf(i == 0 ? (i == 1 ? s : "no") : "dont know"); // expected-warning{{format string is not a string literal}} |
| } |
| |
| void check_writeback_specifier() |
| { |
| int x; |
| char *b; |
| |
| printf("%n",&x); // expected-warning {{'%n' in format string discouraged}} |
| sprintf(b,"%d%%%n",1, &x); // expected-warning {{'%n' in format string dis}} |
| } |
| |
| void check_invalid_specifier(FILE* fp, char *buf) |
| { |
| printf("%s%lb%d","unix",10,20); // expected-warning {{lid conversion '%lb'}} |
| fprintf(fp,"%%%l"); // expected-warning {{lid conversion '%l'}} |
| sprintf(buf,"%%%%%ld%d%d", 1, 2, 3); // no-warning |
| snprintf(buf, 2, "%%%%%ld%;%d", 1, 2, 3); // expected-warning {{sion '%;'}} |
| } |
| |
| void check_null_char_string(char* b) |
| { |
| printf("\0this is bogus%d",1); // expected-warning {{string contains '\0'}} |
| snprintf(b,10,"%%%%%d\0%d",1,2); // expected-warning {{string contains '\0'}} |
| printf("%\0d",1); // expected-warning {{string contains '\0'}} |
| } |
| |
| void check_empty_format_string(char* buf, ...) |
| { |
| va_list ap; |
| va_start(ap,buf); |
| vprintf("",ap); // expected-warning {{format string is empty}} |
| sprintf(buf,""); // expected-warning {{format string is empty}} |
| } |
| |
| void check_wide_string(char* b, ...) |
| { |
| va_list ap; |
| va_start(ap,b); |
| |
| printf(L"foo %d",2); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} |
| vasprintf(&b,L"bar %d",ap); // expected-warning {{incompatible pointer types}}, expected-warning {{should not be a wide string}} |
| } |
| |
| void check_asterisk_precision_width(int x) { |
| printf("%*d"); // expected-warning {{'*' specified field width is missing a matching 'int' argument}} |
| printf("%.*d"); // expected-warning {{'.*' specified field precision is missing a matching 'int' argument}} |
| printf("%*d",12,x); // no-warning |
| printf("%*d","foo",x); // expected-warning {{field width should have type 'int', but argument has type 'char *'}} |
| printf("%.*d","foo",x); // expected-warning {{field precision should have type 'int', but argument has type 'char *'}} |
| } |
| |
| void __attribute__((format(printf,1,3))) myprintf(const char*, int blah, ...); |
| |
| void test_myprintf() { |
| myprintf("%d", 17, 18); // okay |
| } |
| |
| void test_constant_bindings(void) { |
| const char * const s1 = "hello"; |
| const char s2[] = "hello"; |
| const char *s3 = "hello"; |
| char * const s4 = "hello"; |
| extern const char s5[]; |
| |
| printf(s1); // no-warning |
| printf(s2); // no-warning |
| printf(s3); // expected-warning{{not a string literal}} |
| printf(s4); // expected-warning{{not a string literal}} |
| printf(s5); // expected-warning{{not a string literal}} |
| } |