misc-ps-region-store.m revision aad45e0e0fef78af16849714047d877bb4473de8 
1// RUN: clang -analyze -checker-cfref --analyzer-store=region --verify -fblocks %s
2
3typedef struct objc_selector *SEL;
4typedef signed char BOOL;
5typedef int NSInteger;
6typedef unsigned int NSUInteger;
7typedef struct _NSZone NSZone;
8@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
9@protocol NSObject  - (BOOL)isEqual:(id)object; @end
10@protocol NSCopying  - (id)copyWithZone:(NSZone *)zone; @end
11@protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone; @end
12@protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder; @end
13@interface NSObject <NSObject> {} - (id)init; @end
14extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
15@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>
16- (NSUInteger)length;
17+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
18@end extern NSString * const NSBundleDidLoadNotification;
19@interface NSAssertionHandler : NSObject {}
20+ (NSAssertionHandler *)currentHandler;
21- (void)handleFailureInMethod:(SEL)selector object:(id)object file:(NSString *)fileName lineNumber:(NSInteger)line description:(NSString *)format,...;
22@end
23extern NSString * const NSConnectionReplyMode;
24
25
26//---------------------------------------------------------------------------
27// Test case 'checkaccess_union' differs for region store and basic store.
28// The basic store doesn't reason about compound literals, so the code
29// below won't fire an "uninitialized value" warning.
30//---------------------------------------------------------------------------
31
32// PR 2948 (testcase; crash on VisitLValue for union types)
33// http://llvm.org/bugs/show_bug.cgi?id=2948
34
35void checkaccess_union() {
36  int ret = 0, status;
37  if (((((__extension__ (((union {  // expected-warning {{ Branch condition evaluates to an uninitialized value.}}
38    __typeof (status) __in; int __i;}
39    )
40    {
41      .__in = (status)}
42      ).__i))) & 0xff00) >> 8) == 1)
43        ret = 1;
44}
45
46
47// Check our handling of fields being invalidated by function calls.
48struct test2_struct { int x; int y; char* s; };
49void test2_helper(struct test2_struct* p);
50
51char test2() {
52  struct test2_struct s;
53  test2_help(&s);
54  char *p = 0;
55  
56  if (s.x > 1) {
57    if (s.s != 0) {
58      p = "hello";
59    }
60  }
61  
62  if (s.x > 1) {
63    if (s.s != 0) {
64      return *p;
65    }
66  }
67
68  return 'a';
69}
70
71///
72@interface Test3 : NSObject {
73  int flag;
74}
75- (void)test_self_tracking;
76@end
77
78@implementation Test3
79- (void)test_self_tracking {
80  char *p = 0;
81  char c;
82
83  if (flag)
84    p = "hello";
85
86  if (flag)
87    c = *p; // no-warning
88}
89@end
90
91