| 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 | |