47 lines
2 KiB
Objective-C
47 lines
2 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,alpha.core -analyzer-store=region -analyzer-constraints=range -verify -fblocks %s
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// expected-no-diagnostics
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// <rdar://problem/6440393> - A bunch of misc. failures involving evaluating
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// these expressions and building CFGs. These tests are here to prevent
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// regressions.
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typedef long long int64_t;
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@class NSString, NSDictionary;
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typedef long NSInteger;
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typedef unsigned long NSUInteger;
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typedef unsigned char Boolean;
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typedef const struct __CFDictionary * CFDictionaryRef;
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extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value);
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void shazam(NSUInteger i, unsigned char **out);
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void rdar_6440393_1(NSDictionary *dict) {
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NSInteger x = 0;
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unsigned char buf[10], *bufptr = buf;
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if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x))
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return;
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shazam(x, &bufptr);
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}
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// <rdar://problem/6845148> - In this example we got a signedness
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// mismatch between the literal '0' and the value of 'scrooge'. The
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// trick is to have the evaluator convert the literal to an unsigned
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// integer when doing a comparison with the pointer. This happens
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// because of the transfer function logic of
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// OSAtomicCompareAndSwap64Barrier, which doesn't have special casts
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// in place to do this for us.
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_Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue );
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extern id objc_lookUpClass(const char *name);
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void rdar_6845148(id debug_yourself) {
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if (!debug_yourself) {
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const char *wacky = ((void *)0);
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Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0);
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OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself);
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}
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}
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void rdar_6845148_b(id debug_yourself) {
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if (!debug_yourself) {
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const char *wacky = ((void *)0);
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Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0);
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OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself);
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}
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}
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