1 // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core -fblocks -verify -Wno-strict-prototypes %s
2 // RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin10 -analyzer-checker=core -fblocks -verify -x objective-c++ %s
4 //===----------------------------------------------------------------------===//
5 // The following code is reduced using delta-debugging from Mac OS X headers:
6 //===----------------------------------------------------------------------===//
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 #if __cplusplus >= 201703L
18 __attribute__((__nothrow__))
21 dispatch_queue_create(const char *label, dispatch_queue_attr_t attr);
24 typedef signed char BOOL;
25 typedef unsigned long NSUInteger;
26 typedef struct _NSZone NSZone;
27 @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
29 - (BOOL)isEqual:(id)object;
30 - (oneway void)release;
32 @protocol NSCopying - (id)copyWithZone:(NSZone *)zone; @end
33 @protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; @end
34 @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; @end
35 @interface NSObject <NSObject> {}
40 extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
41 @interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>
43 - (const char *)UTF8String;
44 - (id)initWithFormat:(NSString *)format arguments:(va_list)argList __attribute__((format(__NSString__, 1, 0)));
46 @class NSString, NSData;
47 typedef struct cssm_sample {} CSSM_SAMPLEGROUP, *CSSM_SAMPLEGROUP_PTR;
48 typedef struct __aslclient *aslclient;
49 typedef struct __aslmsg *aslmsg;
50 aslclient asl_open(const char *ident, const char *facility, uint32_t opts);
51 int asl_log(aslclient asl, aslmsg msg, int level, const char *format, ...) __attribute__((__format__ (__printf__, 4, 5)));
57 //===----------------------------------------------------------------------===//
58 // Begin actual test cases.
59 //===----------------------------------------------------------------------===//
61 // test1 - This test case exposed logic that caused the analyzer to crash because of a memory bug
62 // in BlockDataRegion. It represents real code that contains two block literals. Eventually
63 // via IPA 'logQueue' and 'client' should be updated after the call to 'dispatch_once'.
64 void test1(NSString *format, ...) {
65 static dispatch_queue_t logQueue;
66 static aslclient client;
67 static dispatch_once_t pred;
69 if (__builtin_expect(*(&pred), ~0l) != ~0l)
70 dispatch_once(&pred, ^{
71 logQueue = dispatch_queue_create("com.mycompany.myproduct.asl", 0);
72 client = asl_open(((char*)0), "com.mycompany.myproduct", 0);
77 __builtin_va_start(args, format);
79 NSString *str = [[NSString alloc] initWithFormat:format arguments:args];
80 dispatch_async(logQueue, ^{ asl_log(client, ((aslmsg)0), 4, "%s", [str UTF8String]); });
83 __builtin_va_end(args);
86 // test2 - Test that captured variables that are uninitialized are flagged
91 ^{ y = x + 1; }(); // expected-warning{{Variable 'x' is uninitialized when captured by block}}
97 ^{ y = x + 1; }(); // expected-warning {{left operand of '+' is a garbage value}}
101 typedef void (^myblock)(void);
102 myblock f = ^(void) { f(); }; // expected-warning{{Variable 'f' is uninitialized when captured by block}}
106 void testMessaging(void) {
107 [[^(void){} copy] release];
111 @interface rdar12415065 : NSObject
114 @implementation rdar12415065
116 // At one point this crashed because we created a path note at a
117 // PreStmtPurgeDeadSymbols point but only knew how to deal with PostStmt
120 extern dispatch_queue_t queue;
125 // This previously was a false positive with 'x' being flagged as being
126 // uninitialized when captured by the exterior block (when it is only
127 // captured by the interior block).
128 dispatch_async(queue, ^{
131 dispatch_async(queue, ^{ (void)x; });
138 void testReturnVariousSignatures(void) {
156 // This test used to cause infinite loop in the region invalidation.
157 void blockCapturesItselfInTheLoop(int x, int m) {
158 void (^assignData)(int) = ^(int x){
172 // Blocks that called the function they were contained in that also have
173 // static locals caused crashes.
174 void takeNonnullBlock(void (^)(void)) __attribute__((nonnull));
175 void takeNonnullIntBlock(int (^)(void)) __attribute__((nonnull));
177 void testCallContainingWithSignature1(void)
180 static const char str[] = "Lost connection to sharingd";
181 testCallContainingWithSignature1();
185 void testCallContainingWithSignature2(void)
187 takeNonnullBlock(^void{
188 static const char str[] = "Lost connection to sharingd";
189 testCallContainingWithSignature2();
193 void testCallContainingWithSignature3(void)
195 takeNonnullBlock(^void(void){
196 static const char str[] = "Lost connection to sharingd";
197 testCallContainingWithSignature3();
201 void testCallContainingWithSignature4(void)
203 takeNonnullBlock(^void(void){
204 static const char str[] = "Lost connection to sharingd";
205 testCallContainingWithSignature4();
209 void testCallContainingWithSignature5(void)
211 takeNonnullIntBlock(^{
212 static const char str[] = "Lost connection to sharingd";
213 testCallContainingWithSignature5();
218 __attribute__((objc_root_class))
219 @interface SuperClass
223 @interface SomeClass : SuperClass
226 // Make sure to properly handle super-calls when a block captures
227 // a local variable named 'self'.
228 @implementation SomeClass
230 /*__weak*/ SomeClass *weakSelf = self;
232 SomeClass *self = weakSelf;
235 [super someMethod]; // no-warning
241 // The incorrect block variable initialization below is a hard compile-time
243 #if !defined(__cplusplus)
244 void call_block_with_fewer_arguments(void) {
245 void (^b)() = ^(int a) { };
246 b(); // expected-warning {{Block taking 1 argument is called with fewer (0)}}
250 int getBlockFlags(void) {
252 return ((struct Block_layout *)^{ (void)x; })->flags; // no-warning