uninit-msg-expr.m revision d84f422ebfde2145bce79a8fa823e3393b392994 
1// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-check-objc-mem -analyzer-store=basic -verify %s
2// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-check-objc-mem -analyzer-store=region -verify %s
3
4//===----------------------------------------------------------------------===//
5// The following code is reduced using delta-debugging from
6// Foundation.h (Mac OS X).
7//
8// It includes the basic definitions for the test cases below.
9// Not directly including Foundation.h directly makes this test case 
10// both svelte and portable to non-Mac platforms.
11//===----------------------------------------------------------------------===//
12
13typedef signed char BOOL;
14typedef unsigned int NSUInteger;
15typedef struct _NSZone NSZone;
16@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
17@protocol NSObject  - (BOOL)isEqual:(id)object; @end
18@protocol NSCopying  - (id)copyWithZone:(NSZone *)zone; @end
19@protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone; @end
20@protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder; @end
21@interface NSObject <NSObject> {} @end
22@class NSString, NSData;
23@class NSString, NSData, NSMutableData, NSMutableDictionary, NSMutableArray;
24typedef struct {} NSFastEnumerationState;
25@protocol NSFastEnumeration
26- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len;
27@end
28@class NSData, NSIndexSet, NSString, NSURL;
29@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>
30- (NSUInteger)count;
31@end
32@interface NSArray (NSArrayCreation)
33+ (id)array;
34- (NSUInteger)length;
35- (void)addObject:(id)object;
36@end
37extern NSString * const NSUndoManagerCheckpointNotification;
38
39//===----------------------------------------------------------------------===//
40// Test cases.
41//===----------------------------------------------------------------------===//
42
43unsigned f1() {
44  NSString *aString;
45  return [aString length]; // expected-warning {{Receiver in message expression is an uninitialized value}}
46}
47
48unsigned f2() {
49  NSString *aString = 0;
50  return [aString length]; // no-warning
51}
52
53void f3() {
54  NSMutableArray *aArray = [NSArray array];
55  NSString *aString;
56  [aArray addObject:aString]; // expected-warning {{Argument in message expression is an uninitialized value}}
57}
58