168 lines
8.9 KiB
C
168 lines
8.9 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify -Wformat-nonliteral %s
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// Test that -Wformat=0 works:
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// RUN: %clang_cc1 -fsyntax-only -Werror -Wformat=0 %s
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#include <stdarg.h>
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typedef __typeof(sizeof(int)) size_t;
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typedef struct _FILE FILE;
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typedef __WCHAR_TYPE__ wchar_t;
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int fscanf(FILE * restrict, const char * restrict, ...) ;
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int scanf(const char * restrict, ...) ;
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int sscanf(const char * restrict, const char * restrict, ...) ;
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int my_scanf(const char * restrict, ...) __attribute__((__format__(__scanf__, 1, 2)));
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int vscanf(const char * restrict, va_list);
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int vfscanf(FILE * restrict, const char * restrict, va_list);
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int vsscanf(const char * restrict, const char * restrict, va_list);
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void test(const char *s, int *i) {
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scanf(s, i); // expected-warning{{ormat string is not a string literal}}
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scanf("%0d", i); // expected-warning{{zero field width in scanf format string is unused}}
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scanf("%00d", i); // expected-warning{{zero field width in scanf format string is unused}}
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scanf("%d%[asdfasdfd", i, s); // expected-warning{{no closing ']' for '%[' in scanf format string}}
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unsigned short s_x;
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scanf ("%" "hu" "\n", &s_x); // no-warning
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scanf("%y", i); // expected-warning{{invalid conversion specifier 'y'}}
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scanf("%%"); // no-warning
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scanf("%%%1$d", i); // no-warning
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scanf("%1$d%%", i); // no-warning
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scanf("%d", i, i); // expected-warning{{data argument not used by format string}}
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scanf("%*d", i); // // expected-warning{{data argument not used by format string}}
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scanf("%*d", i); // // expected-warning{{data argument not used by format string}}
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scanf("%*d%1$d", i); // no-warning
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scanf("%s", (char*)0); // no-warning
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scanf("%s", (volatile char*)0); // no-warning
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scanf("%s", (signed char*)0); // no-warning
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scanf("%s", (unsigned char*)0); // no-warning
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scanf("%hhu", (signed char*)0); // no-warning
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}
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void bad_length_modifiers(char *s, void *p, wchar_t *ws, long double *ld) {
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scanf("%hhs", "foo"); // expected-warning{{length modifier 'hh' results in undefined behavior or no effect with 's' conversion specifier}}
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scanf("%1$zp", &p); // expected-warning{{length modifier 'z' results in undefined behavior or no effect with 'p' conversion specifier}}
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scanf("%ls", ws); // no-warning
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scanf("%#.2Lf", ld); // expected-warning{{invalid conversion specifier '#'}}
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}
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// Test that the scanf call site is where the warning is attached. If the
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// format string is somewhere else, point to it in a note.
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void pr9751() {
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int *i;
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char str[100];
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const char kFormat1[] = "%00d"; // expected-note{{format string is defined here}}}
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scanf(kFormat1, i); // expected-warning{{zero field width in scanf format string is unused}}
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scanf("%00d", i); // expected-warning{{zero field width in scanf format string is unused}}
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const char kFormat2[] = "%["; // expected-note{{format string is defined here}}}
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scanf(kFormat2, str); // expected-warning{{no closing ']' for '%[' in scanf format string}}
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scanf("%[", str); // expected-warning{{no closing ']' for '%[' in scanf format string}}
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const char kFormat3[] = "%hu"; // expected-note{{format string is defined here}}}
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scanf(kFormat3, &i); // expected-warning {{format specifies type 'unsigned short *' but the argument}}
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const char kFormat4[] = "%lp"; // expected-note{{format string is defined here}}}
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scanf(kFormat4, &i); // expected-warning {{length modifier 'l' results in undefined behavior or no effect with 'p' conversion specifier}}
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}
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void test_variants(int *i, const char *s, ...) {
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FILE *f = 0;
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char buf[100];
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fscanf(f, "%ld", i); // expected-warning{{format specifies type 'long *' but the argument has type 'int *'}}
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sscanf(buf, "%ld", i); // expected-warning{{format specifies type 'long *' but the argument has type 'int *'}}
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my_scanf("%ld", i); // expected-warning{{format specifies type 'long *' but the argument has type 'int *'}}
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va_list ap;
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va_start(ap, s);
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vscanf("%[abc", ap); // expected-warning{{no closing ']' for '%[' in scanf format string}}
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vfscanf(f, "%[abc", ap); // expected-warning{{no closing ']' for '%[' in scanf format string}}
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vsscanf(buf, "%[abc", ap); // expected-warning{{no closing ']' for '%[' in scanf format string}}
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}
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void test_scanlist(int *ip, char *sp, wchar_t *ls) {
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scanf("%[abc]", ip); // expected-warning{{format specifies type 'char *' but the argument has type 'int *'}}
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scanf("%h[abc]", sp); // expected-warning{{length modifier 'h' results in undefined behavior or no effect with '[' conversion specifier}}
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scanf("%l[xyx]", ls); // no-warning
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scanf("%ll[xyx]", ls); // expected-warning {{length modifier 'll' results in undefined behavior or no effect with '[' conversion specifier}}
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}
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void test_alloc_extension(char **sp, wchar_t **lsp, float *fp) {
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/* Make sure "%a" gets parsed as a conversion specifier for float,
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* even when followed by an 's', 'S' or '[', which would cause it to be
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* parsed as a length modifier in C90. */
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scanf("%as", sp); // expected-warning{{format specifies type 'float *' but the argument has type 'char **'}}
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scanf("%aS", lsp); // expected-warning{{format specifies type 'float *' but the argument has type 'wchar_t **'}}
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scanf("%a[bcd]", sp); // expected-warning{{format specifies type 'float *' but the argument has type 'char **'}}
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// Test that the 'm' length modifier is only allowed with s, S, c, C or [.
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// TODO: Warn that 'm' is an extension.
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scanf("%ms", sp); // No warning.
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scanf("%mS", lsp); // No warning.
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scanf("%mc", sp); // No warning.
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scanf("%mC", lsp); // No warning.
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scanf("%m[abc]", sp); // No warning.
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scanf("%md", sp); // expected-warning{{length modifier 'm' results in undefined behavior or no effect with 'd' conversion specifier}}
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// Test argument type check for the 'm' length modifier.
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scanf("%ms", fp); // expected-warning{{format specifies type 'char **' but the argument has type 'float *'}}
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scanf("%mS", fp); // expected-warning-re{{format specifies type 'wchar_t \*\*' \(aka '[^']+'\) but the argument has type 'float \*'}}
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scanf("%mc", fp); // expected-warning{{format specifies type 'char **' but the argument has type 'float *'}}
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scanf("%mC", fp); // expected-warning-re{{format specifies type 'wchar_t \*\*' \(aka '[^']+'\) but the argument has type 'float \*'}}
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scanf("%m[abc]", fp); // expected-warning{{format specifies type 'char **' but the argument has type 'float *'}}
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}
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void test_quad(int *x, long long *llx) {
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scanf("%qd", x); // expected-warning{{format specifies type 'long long *' but the argument has type 'int *'}}
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scanf("%qd", llx); // no-warning
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}
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void test_writeback(int *x) {
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scanf("%n", (void*)0); // expected-warning{{format specifies type 'int *' but the argument has type 'void *'}}
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scanf("%n %c", x, x); // expected-warning{{format specifies type 'char *' but the argument has type 'int *'}}
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scanf("%hhn", (signed char*)0); // no-warning
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scanf("%hhn", (char*)0); // no-warning
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scanf("%hhn", (unsigned char*)0); // no-warning
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scanf("%hhn", (int*)0); // expected-warning{{format specifies type 'signed char *' but the argument has type 'int *'}}
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scanf("%hn", (short*)0); // no-warning
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scanf("%hn", (unsigned short*)0); // no-warning
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scanf("%hn", (int*)0); // expected-warning{{format specifies type 'short *' but the argument has type 'int *'}}
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scanf("%n", (int*)0); // no-warning
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scanf("%n", (unsigned int*)0); // no-warning
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scanf("%n", (char*)0); // expected-warning{{format specifies type 'int *' but the argument has type 'char *'}}
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scanf("%ln", (long*)0); // no-warning
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scanf("%ln", (unsigned long*)0); // no-warning
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scanf("%ln", (int*)0); // expected-warning{{format specifies type 'long *' but the argument has type 'int *'}}
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scanf("%lln", (long long*)0); // no-warning
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scanf("%lln", (unsigned long long*)0); // no-warning
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scanf("%lln", (int*)0); // expected-warning{{format specifies type 'long long *' but the argument has type 'int *'}}
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scanf("%qn", (long long*)0); // no-warning
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scanf("%qn", (unsigned long long*)0); // no-warning
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scanf("%qn", (int*)0); // expected-warning{{format specifies type 'long long *' but the argument has type 'int *'}}
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}
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void test_qualifiers(const int *cip, volatile int* vip,
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const char *ccp, volatile char* vcp,
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const volatile int *cvip) {
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scanf("%d", cip); // expected-warning{{format specifies type 'int *' but the argument has type 'const int *'}}
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scanf("%n", cip); // expected-warning{{format specifies type 'int *' but the argument has type 'const int *'}}
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scanf("%s", ccp); // expected-warning{{format specifies type 'char *' but the argument has type 'const char *'}}
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scanf("%d", cvip); // expected-warning{{format specifies type 'int *' but the argument has type 'const volatile int *'}}
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scanf("%d", vip); // No warning.
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scanf("%n", vip); // No warning.
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scanf("%c", vcp); // No warning.
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typedef int* ip_t;
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typedef const int* cip_t;
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scanf("%d", (ip_t)0); // No warning.
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scanf("%d", (cip_t)0); // expected-warning{{format specifies type 'int *' but the argument has type 'cip_t' (aka 'const int *')}}
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}
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