1 // RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,alpha.core -analyzer-store=region -analyzer-constraints=range -verify -fblocks %s 2 // expected-no-diagnostics 3 4 // <rdar://problem/6440393> - A bunch of misc. failures involving evaluating 5 // these expressions and building CFGs. These tests are here to prevent 6 // regressions. 7 typedef long long int64_t; 8 @class NSString, NSDictionary; 9 typedef long NSInteger; 10 typedef unsigned long NSUInteger; 11 typedef unsigned char Boolean; 12 typedef const struct __CFDictionary * CFDictionaryRef; 13 14 extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value); 15 void shazam(NSUInteger i, unsigned char **out); 16 17 void rdar_6440393_1(NSDictionary *dict) { 18 NSInteger x = 0; 19 unsigned char buf[10], *bufptr = buf; 20 if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x)) 21 return; 22 shazam(x, &bufptr); 23 } 24 25 // <rdar://problem/6845148> - In this example we got a signedness 26 // mismatch between the literal '0' and the value of 'scrooge'. The 27 // trick is to have the evaluator convert the literal to an unsigned 28 // integer when doing a comparison with the pointer. This happens 29 // because of the transfer function logic of 30 // OSAtomicCompareAndSwap64Barrier, which doesn't have special casts 31 // in place to do this for us. 32 _Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue ); 33 extern id objc_lookUpClass(const char *name); 34 void rdar_6845148(id debug_yourself) { 35 if (!debug_yourself) { 36 const char *wacky = ((void *)0); 37 Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); 38 OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself); 39 } 40 } 41 void rdar_6845148_b(id debug_yourself) { 42 if (!debug_yourself) { 43 const char *wacky = ((void *)0); 44 Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); 45 OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself); 46 } 47 } 48
