clang/test/Analysis/objc-boxing.m

   1 // RUN: %clang_analyze_cc1 -Wno-objc-literal-conversion -analyzer-checker=core,unix.Malloc,osx.cocoa.NonNilReturnValue,debug.ExprInspection -verify %s
   2
   3 void clang_analyzer_eval(int);
   4
   5 typedef signed char BOOL;
   6 typedef long NSInteger;
   7 typedef unsigned long NSUInteger;
   8
   9 @protocol NSObject
  10 @end
  11 @interface NSObject <NSObject> {}
  12 @end
  13 @protocol NSCopying
  14 @end
  15 @protocol NSCoding
  16 @end
  17
  18 @interface NSString @end
  19 @interface NSString (NSStringExtensionMethods)
  20 + (id)stringWithUTF8String:(const char *)nullTerminatedCString;
  21 @end
  22
  23 @interface NSNumber
  24 + (NSNumber *)numberWithChar:(char)value;
  25 + (NSNumber *)numberWithUnsignedChar:(unsigned char)value;
  26 + (NSNumber *)numberWithShort:(short)value;
  27 + (NSNumber *)numberWithUnsignedShort:(unsigned short)value;
  28 + (NSNumber *)numberWithInt:(int)value;
  29 + (NSNumber *)numberWithUnsignedInt:(unsigned int)value;
  30 + (NSNumber *)numberWithLong:(long)value;
  31 + (NSNumber *)numberWithUnsignedLong:(unsigned long)value;
  32 + (NSNumber *)numberWithLongLong:(long long)value;
  33 + (NSNumber *)numberWithUnsignedLongLong:(unsigned long long)value;
  34 + (NSNumber *)numberWithFloat:(float)value;
  35 + (NSNumber *)numberWithDouble:(double)value;
  36 + (NSNumber *)numberWithBool:(BOOL)value;
  37 + (NSNumber *)numberWithInteger:(NSInteger)value ;
  38 + (NSNumber *)numberWithUnsignedInteger:(NSUInteger)value ;
  39 @end
  40
  41 @interface NSValue : NSObject <NSCopying, NSCoding>
  42 - (void)getValue:(void *)value;
  43 + (NSValue *)valueWithBytes:(const void *)value
  44                    objCType:(const char *)type;
  45 @end
  46
  47 typedef typeof(sizeof(int)) size_t;
  48 extern void *malloc(size_t);
  49 extern void free(void *);
  50 extern char *strdup(const char *str);
  51
  52 id constant_string(void) {
  53     return @("boxed constant string.");
  54 }
  55
  56 id dynamic_string(void) {
  57     return @(strdup("boxed dynamic string")); // expected-warning{{Potential memory leak}}
  58 }
  59
  60 typedef struct __attribute__((objc_boxable)) {
  61   const char *str;
  62 } BoxableStruct;
  63
  64 id leak_within_boxed_struct(void) {
  65   BoxableStruct bs;
  66   bs.str = strdup("dynamic string"); // The duped string shall be owned by val.
  67   NSValue *val = @(bs); // no-warning
  68   return val;
  69 }
  70
  71 id leak_of_boxed_struct(void) {
  72   BoxableStruct *bs = malloc(sizeof(BoxableStruct)); // The pointer stored in bs isn't owned by val.
  73   NSValue *val = @(*bs); // expected-warning{{Potential leak of memory pointed to by 'bs'}}
  74   return val;
  75 }
  76
  77 id const_char_pointer(int *x) {
  78   if (x)
  79     return @(3);
  80   return @(*x); // expected-warning {{Dereference of null pointer (loaded from variable 'x')}}
  81 }
  82
  83 void checkNonNil(void) {
  84   clang_analyzer_eval(!!@3); // expected-warning{{TRUE}}
  85   clang_analyzer_eval(!!@(3+4)); // expected-warning{{TRUE}}
  86   clang_analyzer_eval(!!@(57.0)); // expected-warning{{TRUE}}
  87
  88   const char *str = "abc";
  89   clang_analyzer_eval(!!@(str)); // expected-warning{{TRUE}}
  90   clang_analyzer_eval(!!@__objc_yes); // expected-warning{{TRUE}}
  91 }
  92