diff options
Diffstat (limited to 'test/Sema/format-strings.c')
| -rw-r--r-- | test/Sema/format-strings.c | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/test/Sema/format-strings.c b/test/Sema/format-strings.c index d6d37961d922..c6dee6801e80 100644 --- a/test/Sema/format-strings.c +++ b/test/Sema/format-strings.c @@ -172,18 +172,21 @@ void test10(int x, float f, int i, long long lli) { printf("%f\n", (long double) 1.0); // expected-warning{{conversion specifies type 'double' but the argument has type 'long double'}} // The man page says that a zero precision is okay. printf("%.0Lf", (long double) 1.0); // no-warning + printf("%c\n", "x"); // expected-warning{{conversion specifies type 'int' but the argument has type 'char *'}} + printf("%c\n", 1.23); // expected-warning{{conversion specifies type 'int' but the argument has type 'double'}} } void test11(void *p, char *s) { printf("%p", p); // no-warning - printf("%.4p", p); // expected-warning{{precision used in 'p' conversion specifier (where it has no meaning)}} - printf("%+p", p); // expected-warning{{flag '+' results in undefined behavior in 'p' conversion specifier}} - printf("% p", p); // expected-warning{{flag ' ' results in undefined behavior in 'p' conversion specifier}} - printf("%0p", p); // expected-warning{{flag '0' results in undefined behavior in 'p' conversion specifier}} + printf("%p", 123); // expected-warning{{conversion specifies type 'void *' but the argument has type 'int'}} + printf("%.4p", p); // expected-warning{{precision used with 'p' conversion specifier, resulting in undefined behavior}} + printf("%+p", p); // expected-warning{{flag '+' results in undefined behavior with 'p' conversion specifier}} + printf("% p", p); // expected-warning{{flag ' ' results in undefined behavior with 'p' conversion specifier}} + printf("%0p", p); // expected-warning{{flag '0' results in undefined behavior with 'p' conversion specifier}} printf("%s", s); // no-warning - printf("%+s", p); // expected-warning{{flag '+' results in undefined behavior in 's' conversion specifier}} - printf("% s", p); // expected-warning{{flag ' ' results in undefined behavior in 's' conversion specifier}} - printf("%0s", p); // expected-warning{{flag '0' results in undefined behavior in 's' conversion specifier}} + printf("%+s", p); // expected-warning{{flag '+' results in undefined behavior with 's' conversion specifier}} + printf("% s", p); // expected-warning{{flag ' ' results in undefined behavior with 's' conversion specifier}} + printf("%0s", p); // expected-warning{{flag '0' results in undefined behavior with 's' conversion specifier}} } void test12(char *b) { @@ -254,3 +257,30 @@ void test_pr_6697() { void rdar8026030(FILE *fp) { fprintf(fp, "\%"); // expected-warning{{incomplete format specifier}} } + +void bug7377_bad_length_mod_usage() { + // Bad length modifiers + printf("%hhs", "foo"); // expected-warning{{length modifier 'hh' results in undefined behavior or no effect with 's' conversion specifier}} + printf("%1$zp", (void *)0); // expected-warning{{length modifier 'z' results in undefined behavior or no effect with 'p' conversion specifier}} + printf("%ls", L"foo"); // no-warning + printf("%#.2Lf", (long double)1.234); // no-warning + + // Bad flag usage + printf("%#p", (void *) 0); // expected-warning{{flag '#' results in undefined behavior with 'p' conversion specifier}} + printf("%0d", -1); // no-warning + printf("%#n", (void *) 0); // expected-warning{{flag '#' results in undefined behavior with 'n' conversion specifier}} expected-warning{{use of '%n' in format string discouraged (potentially insecure)}} + printf("%-n", (void *) 0); // expected-warning{{flag '-' results in undefined behavior with 'n' conversion specifier}} expected-warning{{use of '%n' in format string discouraged (potentially insecure)}} + printf("%-p", (void *) 0); // no-warning + + // Bad optional amount use + printf("%.2c", 'a'); // expected-warning{{precision used with 'c' conversion specifier, resulting in undefined behavior}} + printf("%1n", (void *) 0); // expected-warning{{field width used with 'n' conversion specifier, resulting in undefined behavior}} expected-warning{{use of '%n' in format string discouraged (potentially insecure)}} + printf("%.9n", (void *) 0); // expected-warning{{precision used with 'n' conversion specifier, resulting in undefined behavior}} expected-warning{{use of '%n' in format string discouraged (potentially insecure)}} + + // Ignored flags + printf("% +f", 1.23); // expected-warning{{flag ' ' is ignored when flag '+' is present}} + printf("%+ f", 1.23); // expected-warning{{flag ' ' is ignored when flag '+' is present}} + printf("%0-f", 1.23); // expected-warning{{flag '0' is ignored when flag '-' is present}} + printf("%-0f", 1.23); // expected-warning{{flag '0' is ignored when flag '-' is present}} + printf("%-+f", 1.23); // no-warning +} |