46 lines
1.9 KiB
Mathematica
46 lines
1.9 KiB
Mathematica
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// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core -verify -fblocks %s
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// expected-no-diagnostics
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// A bunch of misc. failures involving evaluating these expressions and
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// building CFGs. These tests are here to prevent 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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// In this example we got a signedness mismatch between the literal '0' and the
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// value of 'scrooge'. The trick is to have the evaluator convert the literal
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// to an unsigned integer when doing a comparison with the pointer. This
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// happens because of the transfer function logic of
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// OSAtomicCompareAndSwap64Barrier, which doesn't have special casts in place
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// 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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