| // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core -verify -fblocks %s |
| // expected-no-diagnostics |
| |
| // A bunch of misc. failures involving evaluating these expressions and |
| // building CFGs. These tests are here to prevent regressions. |
| typedef long long int64_t; |
| @class NSString, NSDictionary; |
| typedef long NSInteger; |
| typedef unsigned long NSUInteger; |
| typedef unsigned char Boolean; |
| typedef const struct __CFDictionary * CFDictionaryRef; |
| |
| extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value); |
| void shazam(NSUInteger i, unsigned char **out); |
| |
| void rdar_6440393_1(NSDictionary *dict) { |
| NSInteger x = 0; |
| unsigned char buf[10], *bufptr = buf; |
| if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x)) |
| return; |
| shazam(x, &bufptr); |
| } |
| |
| // In this example we got a signedness mismatch between the literal '0' and the |
| // value of 'scrooge'. The trick is to have the evaluator convert the literal |
| // to an unsigned integer when doing a comparison with the pointer. This |
| // happens because of the transfer function logic of |
| // OSAtomicCompareAndSwap64Barrier, which doesn't have special casts in place |
| // to do this for us. |
| _Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue ); |
| extern id objc_lookUpClass(const char *name); |
| void rdar_6845148(id debug_yourself) { |
| if (!debug_yourself) { |
| const char *wacky = ((void *)0); |
| Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); |
| OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself); |
| } |
| } |
| void rdar_6845148_b(id debug_yourself) { |
| if (!debug_yourself) { |
| const char *wacky = ((void *)0); |
| Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); |
| OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself); |
| } |
| } |