1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -Wformat-nonliteral -fsyntax-only -fblocks -verify -Wno-objc-root-class %s 2 3 //===----------------------------------------------------------------------===// 4 // The following code is reduced using delta-debugging from 5 // Foundation.h (Mac OS X). 6 // 7 // It includes the basic definitions for the test cases below. 8 // Not including Foundation.h directly makes this test case both svelt and 9 // portable to non-Mac platforms. 10 //===----------------------------------------------------------------------===// 11 12 #include <stdarg.h> 13 14 typedef signed char BOOL; 15 typedef unsigned int NSUInteger; 16 typedef long NSInteger; 17 @class NSString, Protocol; 18 extern void NSLog(NSString *format, ...); 19 extern void NSLogv(NSString *format, va_list args); 20 typedef struct _NSZone NSZone; 21 @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator; 22 @protocol NSObject - (BOOL)isEqual:(id)object; @end 23 @protocol NSCopying - (id)copyWithZone:(NSZone *)zone; @end 24 @protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; @end 25 @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; @end 26 @interface NSObject <NSObject> {} @end 27 typedef float CGFloat; 28 @interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; @end 29 @interface NSSimpleCString : NSString {} @end 30 @interface NSConstantString : NSSimpleCString @end 31 extern void *_NSConstantStringClassReference; 32 33 typedef const struct __CFString * CFStringRef; 34 extern void CFStringCreateWithFormat(CFStringRef format, ...) __attribute__((format(CFString, 1, 2))); 35 #define CFSTR(cStr) ((CFStringRef) __builtin___CFStringMakeConstantString ("" cStr "")) 36 37 // This function is used instead of the builtin if -fno-constant-cfstrings. 38 // The definition on Mac OS X is NOT annotated with format_arg as of 10.8, 39 // but clang will implicitly add the attribute if it's not written. 40 extern CFStringRef __CFStringMakeConstantString(const char *); 41 42 int printf(const char * restrict, ...) ; 43 44 //===----------------------------------------------------------------------===// 45 // Test cases. 46 //===----------------------------------------------------------------------===// 47 48 void check_nslog(unsigned k) { 49 NSLog(@"%d%%", k); // no-warning 50 NSLog(@"%s%lb%d", "unix", 10,20); // expected-warning {{invalid conversion specifier 'b'}} 51 } 52 53 // Check type validation 54 extern void NSLog2(int format, ...) __attribute__((format(__NSString__, 1, 2))); // expected-error {{format argument not an NSString}} 55 extern void CFStringCreateWithFormat2(int *format, ...) __attribute__((format(CFString, 1, 2))); // expected-error {{format argument not a CFString}} 56 57 // <rdar://problem/7068334> - Catch use of long long with int arguments. 58 void rdar_7068334() { 59 long long test = 500; 60 printf("%i ",test); // expected-warning{{format specifies type 'int' but the argument has type 'long long'}} 61 NSLog(@"%i ",test); // expected-warning{{format specifies type 'int' but the argument has type 'long long'}} 62 CFStringCreateWithFormat(CFSTR("%i"),test); // expected-warning{{format specifies type 'int' but the argument has type 'long long'}} 63 } 64 65 // <rdar://problem/7697748> 66 void rdar_7697748() { 67 NSLog(@"%@!"); // expected-warning{{more '%' conversions than data arguments}} 68 } 69 70 @protocol Foo; 71 72 void test_p_conversion_with_objc_pointer(id x, id<Foo> y) { 73 printf("%p", x); // no-warning 74 printf("%p", y); // no-warning 75 } 76 77 // <rdar://problem/10696348>, PR 10274 - CFString and NSString formats are ignored 78 extern void MyNSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2))); 79 extern void MyCFStringCreateWithFormat(CFStringRef format, ...) __attribute__((format(__CFString__, 1, 2))); 80 81 void check_mylog() { 82 MyNSLog(@"%@"); // expected-warning {{more '%' conversions than data arguments}} 83 MyCFStringCreateWithFormat(CFSTR("%@")); // expected-warning {{more '%' conversions than data arguments}} 84 } 85 86 // PR 10275 - format function attribute isn't checked in Objective-C methods 87 @interface Foo 88 + (id)fooWithFormat:(NSString *)fmt, ... __attribute__((format(__NSString__, 1, 2))); 89 + (id)fooWithCStringFormat:(const char *)format, ... __attribute__((format(__printf__, 1, 2))); 90 @end 91 92 void check_method() { 93 [Foo fooWithFormat:@"%@"]; // expected-warning {{more '%' conversions than data arguments}} 94 [Foo fooWithCStringFormat:"%@"]; // expected-warning {{invalid conversion specifier '@'}} 95 } 96 97 // Warn about using BOOL with %@ 98 void rdar10743758(id x) { 99 NSLog(@"%@ %@", x, (BOOL) 1); // expected-warning {{format specifies type 'id' but the argument has type 'BOOL' (aka 'signed char')}} 100 } 101 102 NSString *test_literal_propagation(void) { 103 const char * const s1 = "constant string %s"; // expected-note {{format string is defined here}} 104 printf(s1); // expected-warning {{more '%' conversions than data arguments}} 105 const char * const s5 = "constant string %s"; // expected-note {{format string is defined here}} 106 const char * const s2 = s5; 107 printf(s2); // expected-warning {{more '%' conversions than data arguments}} 108 109 const char * const s3 = (const char *)0; 110 printf(s3); // no-warning (NULL is a valid format string) 111 112 NSString * const ns1 = @"constant string %s"; // expected-note {{format string is defined here}} 113 NSLog(ns1); // expected-warning {{more '%' conversions than data arguments}} 114 NSString * const ns5 = @"constant string %s"; // expected-note {{format string is defined here}} 115 NSString * const ns2 = ns5; 116 NSLog(ns2); // expected-warning {{more '%' conversions than data arguments}} 117 NSString * ns3 = ns1; 118 NSLog(ns3); // expected-warning {{format string is not a string literal}}} 119 } 120 121 // Do not emit warnings when using NSLocalizedString 122 #include "format-strings-system.h" 123 124 // Test it inhibits diag only for macros in system headers 125 #define MyNSLocalizedString(key) GetLocalizedString(key) 126 #define MyNSAssert(fmt, arg) NSLog(fmt, arg, 0, 0) 127 128 void check_NSLocalizedString() { 129 [Foo fooWithFormat:NSLocalizedString(@"format"), @"arg"]; // no-warning 130 [Foo fooWithFormat:MyNSLocalizedString(@"format"), @"arg"]; // expected-warning {{format string is not a string literal}}} 131 } 132 133 void check_NSAssert() { 134 NSAssert(@"Hello %@", @"World"); // no-warning 135 MyNSAssert(@"Hello %@", @"World"); // expected-warning {{data argument not used by format string}} 136 } 137 138 typedef __WCHAR_TYPE__ wchar_t; 139 140 // Test that %S, %C, %ls check for 16 bit types in ObjC strings, as described at 141 // http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html#//apple_ref/doc/uid/TP40004265 142 143 void test_percent_S() { 144 const unsigned short data[] = { 'a', 'b', 0 }; 145 const unsigned short* ptr = data; 146 NSLog(@"%S", ptr); // no-warning 147 148 const wchar_t* wchar_ptr = L"ab"; 149 NSLog(@"%S", wchar_ptr); // expected-warning{{format specifies type 'const unichar *' (aka 'const unsigned short *') but the argument has type 'const wchar_t *'}} 150 } 151 152 void test_percent_ls() { 153 const unsigned short data[] = { 'a', 'b', 0 }; 154 const unsigned short* ptr = data; 155 NSLog(@"%ls", ptr); // no-warning 156 157 const wchar_t* wchar_ptr = L"ab"; 158 NSLog(@"%ls", wchar_ptr); // expected-warning{{format specifies type 'const unichar *' (aka 'const unsigned short *') but the argument has type 'const wchar_t *'}} 159 } 160 161 void test_percent_C() { 162 const unsigned short data = 'a'; 163 NSLog(@"%C", data); // no-warning 164 165 const wchar_t wchar_data = L'a'; 166 NSLog(@"%C", wchar_data); // expected-warning{{format specifies type 'unichar' (aka 'unsigned short') but the argument has type 'wchar_t'}} 167 } 168 169 // Test that %@ works with toll-free bridging (<rdar://problem/10814120>). 170 void test_toll_free_bridging(CFStringRef x, id y) { 171 NSLog(@"%@", x); // no-warning 172 CFStringCreateWithFormat(CFSTR("%@"), x); // no-warning 173 174 NSLog(@"%@", y); // no-warning 175 CFStringCreateWithFormat(CFSTR("%@"), y); // no-warning 176 } 177 178 @interface Bar 179 + (void)log:(NSString *)fmt, ...; 180 + (void)log2:(NSString *)fmt, ... __attribute__((format(NSString, 1, 2))); 181 @end 182 183 @implementation Bar 184 185 + (void)log:(NSString *)fmt, ... { 186 va_list ap; 187 va_start(ap,fmt); 188 NSLogv(fmt, ap); // expected-warning{{format string is not a string literal}} 189 va_end(ap); 190 } 191 192 + (void)log2:(NSString *)fmt, ... { 193 va_list ap; 194 va_start(ap,fmt); 195 NSLogv(fmt, ap); // no-warning 196 va_end(ap); 197 } 198 199 @end 200 201 202 // Test that it is okay to use %p with the address of a block. 203 void rdar11049844_aux(); 204 int rdar11049844() { 205 typedef void (^MyBlock)(void); 206 MyBlock x = ^void() { rdar11049844_aux(); }; 207 printf("%p", x); // no-warning 208 } 209 210 void test_nonBuiltinCFStrings() { 211 CFStringCreateWithFormat(__CFStringMakeConstantString("%@"), 1); // expected-warning{{format specifies type 'id' but the argument has type 'int'}} 212 } 213 214 215 // Don't crash on an invalid argument expression. 216 // <rdar://problem/11890818> 217 @interface NSDictionary : NSObject 218 - (id)objectForKeyedSubscript:(id)key; 219 @end 220 221 void testInvalidFormatArgument(NSDictionary *dict) { 222 NSLog(@"no specifiers", dict[CFSTR("abc")]); // expected-error{{indexing expression is invalid because subscript type 'CFStringRef' (aka 'const struct __CFString *') is not an integral or Objective-C pointer type}} 223 NSLog(@"%@", dict[CFSTR("abc")]); // expected-error{{indexing expression is invalid because subscript type 'CFStringRef' (aka 'const struct __CFString *') is not an integral or Objective-C pointer type}} 224 NSLog(@"%@ %@", dict[CFSTR("abc")]); // expected-error{{indexing expression is invalid because subscript type 'CFStringRef' (aka 'const struct __CFString *') is not an integral or Objective-C pointer type}} 225 226 [Foo fooWithFormat:@"no specifiers", dict[CFSTR("abc")]]; // expected-error{{indexing expression is invalid because subscript type 'CFStringRef' (aka 'const struct __CFString *') is not an integral or Objective-C pointer type}} 227 [Foo fooWithFormat:@"%@", dict[CFSTR("abc")]]; // expected-error{{indexing expression is invalid because subscript type 'CFStringRef' (aka 'const struct __CFString *') is not an integral or Objective-C pointer type}} 228 [Foo fooWithFormat:@"%@ %@", dict[CFSTR("abc")]]; // expected-error{{indexing expression is invalid because subscript type 'CFStringRef' (aka 'const struct __CFString *') is not an integral or Objective-C pointer type}} expected-warning{{more '%' conversions than data arguments}} 229 } 230 231 232 // <rdar://problem/11825593> 233 void testByValueObjectInFormat(Foo *obj) { 234 printf("%d %d %d", 1L, *obj, 1L); // expected-error {{cannot pass object with interface type 'Foo' by value to variadic function; expected type from format string was 'int'}} expected-warning 2 {{format specifies type 'int' but the argument has type 'long'}} 235 printf("%!", *obj); // expected-error {{cannot pass object with interface type 'Foo' by value through variadic function}} expected-warning {{invalid conversion specifier}} 236 printf(0, *obj); // expected-error {{cannot pass object with interface type 'Foo' by value through variadic function}} 237 238 [Bar log2:@"%d", *obj]; // expected-error {{cannot pass object with interface type 'Foo' by value to variadic method; expected type from format string was 'int'}} 239 } 240 241 // <rdar://problem/13557053> 242 void testTypeOf(NSInteger dW, NSInteger dH) { 243 NSLog(@"dW %d dH %d",({ __typeof__(dW) __a = (dW); __a < 0 ? -__a : __a; }),({ __typeof__(dH) __a = (dH); __a < 0 ? -__a : __a; })); // expected-warning 2 {{values of type 'NSInteger' should not be used as format arguments; add an explicit cast to 'long' instead}} 244 } 245 246
