1 | // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core -analyzer-store=region -fblocks -analyzer-opt-analyze-nested-blocks -verify %s |
2 | // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core -analyzer-store=region -fblocks -analyzer-opt-analyze-nested-blocks -verify -x objective-c++ %s |
3 | |
4 | //===----------------------------------------------------------------------===// |
5 | // The following code is reduced using delta-debugging from Mac OS X headers: |
6 | //===----------------------------------------------------------------------===// |
7 | |
8 | typedef __builtin_va_list va_list; |
9 | typedef unsigned int uint32_t; |
10 | typedef struct dispatch_queue_s *dispatch_queue_t; |
11 | typedef struct dispatch_queue_attr_s *dispatch_queue_attr_t; |
12 | typedef void (^dispatch_block_t)(void); |
13 | void dispatch_async(dispatch_queue_t queue, dispatch_block_t block); |
14 | __attribute__((visibility("default"))) __attribute__((__malloc__)) __attribute__((__warn_unused_result__)) __attribute__((__nothrow__)) dispatch_queue_t dispatch_queue_create(const char *label, dispatch_queue_attr_t attr); |
15 | typedef long dispatch_once_t; |
16 | void dispatch_once(dispatch_once_t *predicate, dispatch_block_t block); |
17 | dispatch_queue_t |
18 | dispatch_queue_create(const char *label, dispatch_queue_attr_t attr); |
19 | |
20 | |
21 | typedef signed char BOOL; |
22 | typedef unsigned long NSUInteger; |
23 | typedef struct _NSZone NSZone; |
24 | @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator; |
25 | @protocol NSObject |
26 | - (BOOL)isEqual:(id)object; |
27 | - (oneway void)release; |
28 | @end |
29 | @protocol NSCopying - (id)copyWithZone:(NSZone *)zone; @end |
30 | @protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; @end |
31 | @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; @end |
32 | @interface NSObject <NSObject> {} |
33 | + (id)alloc; |
34 | - (id)init; |
35 | - (id)copy; |
36 | @end |
37 | extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone); |
38 | @interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> |
39 | - (NSUInteger)length; |
40 | - (const char *)UTF8String; |
41 | - (id)initWithFormat:(NSString *)format arguments:(va_list)argList __attribute__((format(__NSString__, 1, 0))); |
42 | @end |
43 | @class NSString, NSData; |
44 | typedef struct cssm_sample {} CSSM_SAMPLEGROUP, *CSSM_SAMPLEGROUP_PTR; |
45 | typedef struct __aslclient *aslclient; |
46 | typedef struct __aslmsg *aslmsg; |
47 | aslclient asl_open(const char *ident, const char *facility, uint32_t opts); |
48 | int asl_log(aslclient asl, aslmsg msg, int level, const char *format, ...) __attribute__((__format__ (__printf__, 4, 5))); |
49 | |
50 | //===----------------------------------------------------------------------===// |
51 | // Begin actual test cases. |
52 | //===----------------------------------------------------------------------===// |
53 | |
54 | // test1 - This test case exposed logic that caused the analyzer to crash because of a memory bug |
55 | // in BlockDataRegion. It represents real code that contains two block literals. Eventually |
56 | // via IPA 'logQueue' and 'client' should be updated after the call to 'dispatch_once'. |
57 | void test1(NSString *format, ...) { |
58 | static dispatch_queue_t logQueue; |
59 | static aslclient client; |
60 | static dispatch_once_t pred; |
61 | do { |
62 | if (__builtin_expect(*(&pred), ~0l) != ~0l) |
63 | dispatch_once(&pred, ^{ |
64 | logQueue = dispatch_queue_create("com.mycompany.myproduct.asl", 0); |
65 | client = asl_open(((char*)0), "com.mycompany.myproduct", 0); |
66 | }); |
67 | } while (0); |
68 | |
69 | va_list args; |
70 | __builtin_va_start(args, format); |
71 | |
72 | NSString *str = [[NSString alloc] initWithFormat:format arguments:args]; |
73 | dispatch_async(logQueue, ^{ asl_log(client, ((aslmsg)0), 4, "%s", [str UTF8String]); }); |
74 | [str release]; |
75 | |
76 | __builtin_va_end(args); |
77 | } |
78 | |
79 | // test2 - Test that captured variables that are uninitialized are flagged |
80 | // as such. |
81 | void test2() { |
82 | static int y = 0; |
83 | int x; |
84 | ^{ y = x + 1; }(); // expected-warning{{Variable 'x' is uninitialized when captured by block}} |
85 | } |
86 | |
87 | void test2_b() { |
88 | static int y = 0; |
89 | __block int x; |
90 | ^{ y = x + 1; }(); // expected-warning {{left operand of '+' is a garbage value}} |
91 | } |
92 | |
93 | void test2_c() { |
94 | typedef void (^myblock)(void); |
95 | myblock f = ^() { f(); }; // expected-warning{{Variable 'f' is uninitialized when captured by block}} |
96 | } |
97 | |
98 | |
99 | void testMessaging() { |
100 | // <rdar://problem/12119814> |
101 | [[^(){} copy] release]; |
102 | } |
103 | |
104 | |
105 | @interface rdar12415065 : NSObject |
106 | @end |
107 | |
108 | @implementation rdar12415065 |
109 | - (void)test { |
110 | // At one point this crashed because we created a path note at a |
111 | // PreStmtPurgeDeadSymbols point but only knew how to deal with PostStmt |
112 | // points. <rdar://problem/12687586> |
113 | |
114 | extern dispatch_queue_t queue; |
115 | |
116 | if (!queue) |
117 | return; |
118 | |
119 | // This previously was a false positive with 'x' being flagged as being |
120 | // uninitialized when captured by the exterior block (when it is only |
121 | // captured by the interior block). |
122 | dispatch_async(queue, ^{ |
123 | double x = 0.0; |
124 | if (24.0f < x) { |
125 | dispatch_async(queue, ^{ (void)x; }); |
126 | [self test]; |
127 | } |
128 | }); |
129 | } |
130 | @end |
131 | |
132 | void testReturnVariousSignatures() { |
133 | (void)^int(){ |
134 | return 42; |
135 | }(); |
136 | |
137 | (void)^int{ |
138 | return 42; |
139 | }(); |
140 | |
141 | (void)^(){ |
142 | return 42; |
143 | }(); |
144 | |
145 | (void)^{ |
146 | return 42; |
147 | }(); |
148 | } |
149 | |
150 | // This test used to cause infinite loop in the region invalidation. |
151 | void blockCapturesItselfInTheLoop(int x, int m) { |
152 | void (^assignData)(int) = ^(int x){ |
153 | x++; |
154 | }; |
155 | while (m < 0) { |
156 | void (^loop)(int); |
157 | loop = ^(int x) { |
158 | assignData(x); |
159 | }; |
160 | assignData = loop; |
161 | m++; |
162 | } |
163 | assignData(x); |
164 | } |
165 | |
166 | // Blocks that called the function they were contained in that also have |
167 | // static locals caused crashes. |
168 | // rdar://problem/21698099 |
169 | void takeNonnullBlock(void (^)(void)) __attribute__((nonnull)); |
170 | void takeNonnullIntBlock(int (^)(void)) __attribute__((nonnull)); |
171 | |
172 | void testCallContainingWithSignature1() |
173 | { |
174 | takeNonnullBlock(^{ |
175 | static const char str[] = "Lost connection to sharingd"; |
176 | testCallContainingWithSignature1(); |
177 | }); |
178 | } |
179 | |
180 | void testCallContainingWithSignature2() |
181 | { |
182 | takeNonnullBlock(^void{ |
183 | static const char str[] = "Lost connection to sharingd"; |
184 | testCallContainingWithSignature2(); |
185 | }); |
186 | } |
187 | |
188 | void testCallContainingWithSignature3() |
189 | { |
190 | takeNonnullBlock(^void(){ |
191 | static const char str[] = "Lost connection to sharingd"; |
192 | testCallContainingWithSignature3(); |
193 | }); |
194 | } |
195 | |
196 | void testCallContainingWithSignature4() |
197 | { |
198 | takeNonnullBlock(^void(void){ |
199 | static const char str[] = "Lost connection to sharingd"; |
200 | testCallContainingWithSignature4(); |
201 | }); |
202 | } |
203 | |
204 | void testCallContainingWithSignature5() |
205 | { |
206 | takeNonnullIntBlock(^{ |
207 | static const char str[] = "Lost connection to sharingd"; |
208 | testCallContainingWithSignature5(); |
209 | return 0; |
210 | }); |
211 | } |
212 | |
213 | __attribute__((objc_root_class)) |
214 | @interface SuperClass |
215 | - (void)someMethod; |
216 | @end |
217 | |
218 | @interface SomeClass : SuperClass |
219 | @end |
220 | |
221 | // Make sure to properly handle super-calls when a block captures |
222 | // a local variable named 'self'. |
223 | @implementation SomeClass |
224 | -(void)foo; { |
225 | /*__weak*/ SomeClass *weakSelf = self; |
226 | (void)(^(void) { |
227 | SomeClass *self = weakSelf; |
228 | (void)(^(void) { |
229 | (void)self; |
230 | [super someMethod]; // no-warning |
231 | }); |
232 | }); |
233 | } |
234 | @end |
235 | |
236 | // The incorrect block variable initialization below is a hard compile-time |
237 | // error in C++. |
238 | #if !defined(__cplusplus) |
239 | void call_block_with_fewer_arguments() { |
240 | void (^b)() = ^(int a) { }; |
241 | b(); // expected-warning {{Block taking 1 argument is called with fewer (0)}} |
242 | } |
243 | #endif |
244 | |