| 1 | // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core -analyzer-store=region -verify -fblocks %s |
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| 2 | // expected-no-diagnostics |
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| 3 | |
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| 4 | // <rdar://problem/6440393> - A bunch of misc. failures involving evaluating |
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| 5 | // these expressions and building CFGs. These tests are here to prevent |
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| 6 | // regressions. |
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| 7 | typedef long long int64_t; |
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| 8 | @class NSString, NSDictionary; |
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| 9 | typedef long NSInteger; |
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| 10 | typedef unsigned long NSUInteger; |
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| 11 | typedef unsigned char Boolean; |
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| 12 | typedef const struct __CFDictionary * CFDictionaryRef; |
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| 13 | |
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| 14 | extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value); |
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| 15 | void shazam(NSUInteger i, unsigned char **out); |
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| 16 | |
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| 17 | void rdar_6440393_1(NSDictionary *dict) { |
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| 18 | NSInteger x = 0; |
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| 19 | unsigned char buf[10], *bufptr = buf; |
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| 20 | if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x)) |
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| 21 | return; |
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| 22 | shazam(x, &bufptr); |
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| 23 | } |
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| 24 | |
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| 25 | // <rdar://problem/6845148> - In this example we got a signedness |
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| 26 | // mismatch between the literal '0' and the value of 'scrooge'. The |
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| 27 | // trick is to have the evaluator convert the literal to an unsigned |
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| 28 | // integer when doing a comparison with the pointer. This happens |
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| 29 | // because of the transfer function logic of |
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| 30 | // OSAtomicCompareAndSwap64Barrier, which doesn't have special casts |
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| 31 | // in place to do this for us. |
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| 32 | _Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue ); |
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| 33 | extern id objc_lookUpClass(const char *name); |
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| 34 | void rdar_6845148(id debug_yourself) { |
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| 35 | if (!debug_yourself) { |
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| 36 | const char *wacky = ((void *)0); |
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| 37 | Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); |
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| 38 | OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself); |
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| 39 | } |
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| 40 | } |
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| 41 | void rdar_6845148_b(id debug_yourself) { |
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| 42 | if (!debug_yourself) { |
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| 43 | const char *wacky = ((void *)0); |
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| 44 | Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0); |
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| 45 | OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself); |
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| 46 | } |
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| 47 | } |
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| 48 | |
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