clang/test/Analysis/CFNumber.c

   1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,osx.coreFoundation.CFNumber,osx.cocoa.RetainCount -verify -triple x86_64-apple-darwin9 %s
   2
   3 typedef signed long CFIndex;
   4 typedef const struct __CFAllocator * CFAllocatorRef;
   5 enum { kCFNumberSInt8Type = 1, kCFNumberSInt16Type = 2,
   6        kCFNumberSInt32Type = 3, kCFNumberSInt64Type = 4,
   7        kCFNumberFloat32Type = 5, kCFNumberFloat64Type = 6,
   8        kCFNumberCharType = 7, kCFNumberShortType = 8,
   9        kCFNumberIntType = 9, kCFNumberLongType = 10,
  10        kCFNumberLongLongType = 11, kCFNumberFloatType = 12,
  11        kCFNumberDoubleType = 13, kCFNumberCFIndexType = 14,
  12        kCFNumberNSIntegerType = 15, kCFNumberCGFloatType = 16,
  13        kCFNumberMaxType = 16 };
  14 typedef CFIndex CFNumberType;
  15 typedef const struct __CFNumber * CFNumberRef;
  16 typedef unsigned char Boolean;
  17 extern CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr);
  18 Boolean CFNumberGetValue(CFNumberRef number, CFNumberType theType, void *valuePtr);
  19
  20 __attribute__((cf_returns_retained)) CFNumberRef f1(unsigned char x) {
  21   return CFNumberCreate(0, kCFNumberSInt16Type, &x);  // expected-warning{{An 8-bit integer is used to initialize a CFNumber object that represents a 16-bit integer; 8 bits of the CFNumber value will be garbage}}
  22 }
  23
  24 __attribute__((cf_returns_retained)) CFNumberRef f2(unsigned short x) {
  25   return CFNumberCreate(0, kCFNumberSInt8Type, &x); // expected-warning{{A 16-bit integer is used to initialize a CFNumber object that represents an 8-bit integer; 8 bits of the integer value will be lost}}
  26 }
  27
  28 // test that the attribute overrides the naming convention.
  29 __attribute__((cf_returns_not_retained)) CFNumberRef CreateNum(unsigned char x) {
  30   return CFNumberCreate(0, kCFNumberSInt8Type, &x); // expected-warning{{leak}}
  31 }
  32
  33 __attribute__((cf_returns_retained)) CFNumberRef f3(unsigned i) {
  34   return CFNumberCreate(0, kCFNumberLongType, &i); // expected-warning{{A 32-bit integer is used to initialize a CFNumber object that represents a 64-bit integer}}
  35 }
  36
  37 unsigned char getValueTest1(CFNumberRef x) {
  38   unsigned char scalar = 0;
  39   CFNumberGetValue(x, kCFNumberSInt16Type, &scalar);  // expected-warning{{A CFNumber object that represents a 16-bit integer is used to initialize an 8-bit integer; 8 bits of the CFNumber value will overwrite adjacent storage}}
  40   return scalar;
  41 }
  42
  43 unsigned char getValueTest2(CFNumberRef x) {
  44   unsigned short scalar = 0;
  45   CFNumberGetValue(x, kCFNumberSInt8Type, &scalar);  // expected-warning{{A CFNumber object that represents an 8-bit integer is used to initialize a 16-bit integer; 8 bits of the integer value will be garbage}}
  46   return scalar;
  47 }