136 lines
4.0 KiB
C++
136 lines
4.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -Wformat-nonliteral -pedantic -fblocks %s
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#include <stdarg.h>
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extern "C" {
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extern int scanf(const char *restrict, ...);
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extern int printf(const char *restrict, ...);
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extern int vprintf(const char *restrict, va_list);
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}
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void f(char **sp, float *fp) {
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scanf("%as", sp); // expected-warning{{'a' length modifier is not supported by ISO C}}
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// TODO: Warn that the 'a' conversion specifier is a C++11 feature.
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printf("%a", 1.0);
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scanf("%afoobar", fp);
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}
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void g() {
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printf("%ls", "foo"); // expected-warning{{format specifies type 'wchar_t *' but the argument has type 'const char *'}}
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}
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// Test that we properly handle format_idx on C++ members.
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class Foo {
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public:
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const char *gettext(const char *fmt) __attribute__((format_arg(2)));
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int scanf(const char *, ...) __attribute__((format(scanf, 2, 3)));
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int printf(const char *, ...) __attribute__((format(printf, 2, 3)));
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int printf2(const char *, ...);
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static const char *gettext_static(const char *fmt) __attribute__((format_arg(1)));
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static int printf_static(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
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};
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void h(int *i) {
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Foo foo;
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foo.scanf("%d"); // expected-warning{{more '%' conversions than data arguments}}
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foo.printf("%d", i); // expected-warning{{format specifies type 'int' but the argument has type 'int *'}}
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Foo::printf_static("%d", i); // expected-warning{{format specifies type 'int' but the argument has type 'int *'}}
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printf(foo.gettext("%d"), i); // expected-warning{{format specifies type 'int' but the argument has type 'int *'}}
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printf(Foo::gettext_static("%d"), i); // expected-warning{{format specifies type 'int' but the argument has type 'int *'}}
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}
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// Test handling __null for format string literal checking.
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extern "C" {
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int test_null_format(const char *format, ...) __attribute__((__format__ (__printf__, 1, 2)));
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}
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void rdar8269537(const char *f)
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{
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test_null_format(false); // expected-warning {{null from a constant boolean}}
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test_null_format(0); // no-warning
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test_null_format(__null); // no-warning
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test_null_format(f); // expected-warning {{not a string literal}}
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}
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int Foo::printf(const char *fmt, ...) {
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va_list ap;
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va_start(ap,fmt);
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const char * const format = fmt;
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vprintf(format, ap); // no-warning
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const char *format2 = fmt;
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vprintf(format2, ap); // expected-warning{{format string is not a string literal}}
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return 0;
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}
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int Foo::printf2(const char *fmt, ...) {
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va_list ap;
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va_start(ap,fmt);
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vprintf(fmt, ap); // expected-warning{{format string is not a string literal}}
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return 0;
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}
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namespace Templates {
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template<typename T>
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void my_uninstantiated_print(const T &arg) {
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printf("%d", arg); // no-warning
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}
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template<typename T>
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void my_print(const T &arg) {
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printf("%d", arg); // expected-warning {{format specifies type 'int' but the argument has type 'const char *'}}
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}
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void use_my_print() {
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my_print("abc"); // expected-note {{requested here}}
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}
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template<typename T>
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class UninstantiatedPrinter {
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public:
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static void print(const T &arg) {
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printf("%d", arg); // no-warning
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}
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};
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template<typename T>
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class Printer {
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void format(const char *fmt, ...) __attribute__((format(printf,2,3)));
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public:
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void print(const T &arg) {
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format("%d", arg); // expected-warning {{format specifies type 'int' but the argument has type 'const char *'}}
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}
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};
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void use_class(Printer<const char *> &p) {
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p.print("abc"); // expected-note {{requested here}}
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}
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extern void (^block_print)(const char * format, ...) __attribute__((format(printf, 1, 2)));
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template<typename T>
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void uninstantiated_call_block_print(const T &arg) {
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block_print("%d", arg); // no-warning
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}
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template<typename T>
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void call_block_print(const T &arg) {
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block_print("%d", arg); // expected-warning {{format specifies type 'int' but the argument has type 'const char *'}}
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}
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void use_block_print() {
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call_block_print("abc"); // expected-note {{requested here}}
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}
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}
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