misc-ps-64.m revision e3f3825bd82f84f2a1ae0a02274a33298bb720b3 
1// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,experimental.core -analyzer-store=region -analyzer-constraints=range -verify -fblocks %s
2
3// <rdar://problem/6440393> - A bunch of misc. failures involving evaluating
4//  these expressions and building CFGs.  These tests are here to prevent
5//  regressions.
6typedef long long int64_t;
7@class NSString, NSDictionary;
8typedef long NSInteger;
9typedef unsigned long NSUInteger;
10typedef unsigned char Boolean;
11typedef const struct __CFDictionary * CFDictionaryRef;
12
13extern Boolean CFDictionaryGetValueIfPresent(CFDictionaryRef theDict, const void *key, const void **value);
14void shazam(NSUInteger i, unsigned char **out);
15
16void rdar_6440393_1(NSDictionary *dict) {
17  NSInteger x = 0;
18  unsigned char buf[10], *bufptr = buf;
19  if (!CFDictionaryGetValueIfPresent(0, dict, (void *)&x))
20    return;
21  shazam(x, &bufptr);
22}
23
24// <rdar://problem/6845148> - In this example we got a signedness
25// mismatch between the literal '0' and the value of 'scrooge'.  The
26// trick is to have the evaluator convert the literal to an unsigned
27// integer when doing a comparison with the pointer.  This happens
28// because of the transfer function logic of
29// OSAtomicCompareAndSwap64Barrier, which doesn't have special casts
30// in place to do this for us.
31_Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue );
32extern id objc_lookUpClass(const char *name);
33void rdar_6845148(id debug_yourself) {
34  if (!debug_yourself) {
35    const char *wacky = ((void *)0);  
36    Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0);  
37    OSAtomicCompareAndSwap64Barrier(0, (int64_t)scrooge, (int64_t*)&debug_yourself);
38  }
39}
40void rdar_6845148_b(id debug_yourself) {
41  if (!debug_yourself) {
42    const char *wacky = ((void *)0);  
43    Class scrooge = wacky ? (Class)objc_lookUpClass(wacky) : ((void *)0);  
44    OSAtomicCompareAndSwap64Barrier((int64_t)scrooge, 0, (int64_t*)&debug_yourself);
45  }
46}
47