1 // RUN: %clang_analyze_cc1 -std=c++14 \
2 // RUN: -analyzer-checker=core,unix.Malloc,cplusplus.NewDelete \
3 // RUN: -analyzer-checker=unix.MismatchedDeallocator \
4 // RUN: -verify -fblocks %s
6 #import "Inputs/system-header-simulator-objc.h"
7 #import "Inputs/system-header-simulator-for-malloc.h"
9 // Done with headers. Start testing.
10 void testNSDatafFreeWhenDoneNoError(NSUInteger dataLength) {
11 unsigned char *data = (unsigned char *)malloc(42);
12 NSData *nsdata = [NSData dataWithBytesNoCopy:data length:dataLength];
15 void testNSDataFreeWhenDoneYES(NSUInteger dataLength) {
16 unsigned char *data = (unsigned char *)malloc(42);
17 NSData *nsdata = [NSData dataWithBytesNoCopy:data length:dataLength freeWhenDone:1]; // no-warning
20 void testNSDataFreeWhenDoneYES2(NSUInteger dataLength) {
21 unsigned char *data = (unsigned char *)malloc(42);
22 NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data length:dataLength freeWhenDone:1]; // no-warning
25 void testNSDataFreeWhenDoneYES2_with_wrapper(NSUInteger dataLength) {
26 unsigned char *data = (unsigned char *)malloc(42);
27 Wrapper *nsdata = [[Wrapper alloc] initWithBytesNoCopy:data length:dataLength]; // no-warning
30 void testNSStringFreeWhenDoneYES3(NSUInteger dataLength) {
31 unsigned char *data = (unsigned char *)malloc(42);
32 NSString *nsstr = [[NSString alloc] initWithBytesNoCopy:data length:dataLength encoding:NSUTF8StringEncoding freeWhenDone:1];
35 void testNSStringFreeWhenDoneYES4(NSUInteger dataLength) {
36 unichar *data = (unichar*)malloc(42);
37 NSString *nsstr = [[NSString alloc] initWithCharactersNoCopy:data length:dataLength freeWhenDone:1];
38 free(data); //expected-warning {{Attempt to free non-owned memory}}
41 void testNSStringFreeWhenDoneYES(NSUInteger dataLength) {
42 unsigned char *data = (unsigned char *)malloc(42);
43 NSString *nsstr = [[NSString alloc] initWithBytesNoCopy:data length:dataLength encoding:NSUTF8StringEncoding freeWhenDone:1]; // no-warning
46 void testNSStringFreeWhenDoneYES2(NSUInteger dataLength) {
47 unichar *data = (unichar*)malloc(42);
48 NSString *nsstr = [[NSString alloc] initWithCharactersNoCopy:data length:dataLength freeWhenDone:1]; // no-warning
52 void testNSDataFreeWhenDoneNO(NSUInteger dataLength) {
53 unsigned char *data = (unsigned char *)malloc(42);
54 NSData *nsdata = [NSData dataWithBytesNoCopy:data length:dataLength freeWhenDone:0]; // expected-warning{{leak}}
57 void testNSDataFreeWhenDoneNO2(NSUInteger dataLength) {
58 unsigned char *data = (unsigned char *)malloc(42);
59 NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data length:dataLength freeWhenDone:0]; // expected-warning{{leak}}
63 void testNSStringFreeWhenDoneNO(NSUInteger dataLength) {
64 unsigned char *data = (unsigned char *)malloc(42);
65 NSString *nsstr = [[NSString alloc] initWithBytesNoCopy:data length:dataLength encoding:NSUTF8StringEncoding freeWhenDone:0]; // expected-warning{{leak}}
68 void testNSStringFreeWhenDoneNewDelete(NSUInteger dataLength) {
69 unsigned char *data = new unsigned char(42);
70 NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data
71 length:dataLength freeWhenDone:1];
72 // expected-warning@-2{{-initWithBytesNoCopy:length:freeWhenDone: cannot take ownership of memory allocated by 'new'}}
75 void testNSStringFreeWhenDoneNewDelete2(NSUInteger dataLength) {
76 unsigned char *data = new unsigned char(42);
77 NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data
79 deallocator:^(void *bytes,
81 delete (unsigned char *)bytes;
85 void testNSStringFreeWhenDoneNO2(NSUInteger dataLength) {
86 unichar *data = (unichar*)malloc(42);
87 NSString *nsstr = [[NSString alloc] initWithCharactersNoCopy:data length:dataLength freeWhenDone:0]; // expected-warning{{leak}}
90 void testOffsetFree() {
91 int *p = (int *)malloc(sizeof(int));
92 NSData *nsdata = [NSData dataWithBytesNoCopy:++p length:sizeof(int) freeWhenDone:1]; // expected-warning{{Argument to +dataWithBytesNoCopy:length:freeWhenDone: is offset by 4 bytes from the start of memory allocated by malloc()}}
95 void testRelinquished1() {
96 void *data = malloc(42);
97 NSData *nsdata = [NSData dataWithBytesNoCopy:data length:42 freeWhenDone:1];
98 free(data); // expected-warning {{Attempt to free non-owned memory}}
101 void testRelinquished2() {
102 void *data = malloc(42);
105 [NSData dataWithBytesNoCopy:data length:42]; // expected-warning {{Use of memory after it is freed}}
109 + (void)param:(void *)p;
112 void testUseAfterFree() {
113 int *p = (int *)malloc(sizeof(int));
115 [My param:p]; // expected-warning{{Use of memory after it is freed}}
119 char *p = (char *)calloc(sizeof(int), 1);
120 CustomData *w = [CustomData somethingNoCopy:p]; // no-warning
123 void testFreeWhenDone() {
124 char *p = (char *)calloc(sizeof(int), 1);
125 CustomData *w = [CustomData something:p freeWhenDone:1]; // no-warning
128 void testFreeWhenDonePositive() {
129 char *p = (char *)calloc(sizeof(int), 1);
130 CustomData *w = [CustomData something:p freeWhenDone:0]; // expected-warning{{leak}}
133 void testFreeWhenDoneNoCopy() {
134 int *p = (int *)malloc(sizeof(int));
135 CustomData *w = [CustomData somethingNoCopy:p length:sizeof(int) freeWhenDone:1]; // no-warning
138 void testFreeWhenDoneNoCopyPositive() {
139 int *p = (int *)malloc(sizeof(int));
140 CustomData *w = [CustomData somethingNoCopy:p length:sizeof(int) freeWhenDone:0]; // expected-warning{{leak}}
143 // Test CF/NS...NoCopy. PR12100: Pointers can escape when custom deallocators are provided.
144 void testNSDatafFreeWhenDone(NSUInteger dataLength) {
146 char *bytes = (char*)malloc(12);
147 str = CFStringCreateWithCStringNoCopy(0, bytes, NSNEXTSTEPStringEncoding, 0); // no warning
148 CFRelease(str); // default allocator also frees bytes
151 void stringWithExternalContentsExample(void) {
152 #define BufferSize 1000
153 CFMutableStringRef mutStr;
156 myBuffer = (UniChar *)malloc(BufferSize * sizeof(UniChar));
158 mutStr = CFStringCreateMutableWithExternalCharactersNoCopy(0, myBuffer, 0, BufferSize, kCFAllocatorNull); // expected-warning{{leak}}
164 // PR12101 : pointers can escape through custom deallocators set on creation of a container.
165 void TestCallbackReleasesMemory(CFDictionaryKeyCallBacks keyCallbacks) {
166 void *key = malloc(12);
167 void *val = malloc(12);
168 CFMutableDictionaryRef x = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &keyCallbacks, &kCFTypeDictionaryValueCallBacks);
169 CFDictionarySetValue(x, key, val);
173 NSData *radar10976702() {
174 void *bytes = malloc(10);
175 return [NSData dataWithBytesNoCopy:bytes length:10]; // no-warning
179 int *x= (int*)malloc(sizeof(int));
180 int (^myBlock)(int) = ^(int num) {
188 @interface NSMapTable : NSObject <NSCopying, NSCoding, NSFastEnumeration>
190 extern void *NSMapGet(NSMapTable *table, const void *key);
191 extern void NSMapInsert(NSMapTable *table, const void *key, const void *value);
192 extern void NSMapInsertKnownAbsent(NSMapTable *table, const void *key, const void *value);
193 char *strdup(const char *s);
195 NSString * radar11152419(NSString *string1, NSMapTable *map) {
196 const char *strkey = "key";
197 NSString *string = ( NSString *)NSMapGet(map, strkey);
199 string = [string1 copy];
200 NSMapInsert(map, strdup(strkey), (void*)string); // no warning
201 NSMapInsertKnownAbsent(map, strdup(strkey), (void*)string); // no warning
206 // Test that we handle pointer escaping through OSAtomicEnqueue.
207 typedef volatile struct {
211 extern "C" void OSAtomicEnqueue( OSQueueHead *__list, void *__new, size_t __offset) __attribute__((weak_import));
212 static inline void radar11111210(OSQueueHead *pool) {
213 void *newItem = malloc(4);
214 OSAtomicEnqueue(pool, newItem, 4);
217 // Pointer might escape through CGDataProviderCreateWithData (radar://11187558).
218 typedef struct CGDataProvider *CGDataProviderRef;
219 typedef void (*CGDataProviderReleaseDataCallback)(void *info, const void *data,
221 extern CGDataProviderRef CGDataProviderCreateWithData(void *info,
222 const void *data, size_t size,
223 CGDataProviderReleaseDataCallback releaseData)
224 __attribute__((visibility("default")));
225 void *calloc(size_t, size_t);
227 static void releaseDataCallback (void *info, const void *data, size_t size) {
228 #pragma unused (info, size)
231 void testCGDataProviderCreateWithData() {
232 void* b = calloc(8, 8);
233 CGDataProviderRef p = CGDataProviderCreateWithData(0, b, 8*8, releaseDataCallback);
236 // Assume that functions which take a function pointer can free memory even if
237 // they are defined in system headers and take the const pointer to the
238 // allocated memory. (radar://11160612)
239 extern CGDataProviderRef UnknownFunWithCallback(void *info,
240 const void *data, size_t size,
241 CGDataProviderReleaseDataCallback releaseData)
242 __attribute__((visibility("default")));
243 void testUnknownFunWithCallBack() {
244 void* b = calloc(8, 8);
245 CGDataProviderRef p = UnknownFunWithCallback(0, b, 8*8, releaseDataCallback);
249 void acceptBlockParam(void *, void (^block)(void *), unsigned);
250 void testCallWithBlockCallback() {
251 void *l = malloc(12);
252 acceptBlockParam(l, ^(void *i) { free(i); }, sizeof(char *));
255 // Test blocks in system headers.
256 void testCallWithBlockCallbackInSystem() {
257 void *l = malloc(12);
258 SystemHeaderFunctionWithBlockParam(l, ^(void *i) { free(i); }, sizeof(char *));
261 // Test escape into NSPointerArray. radar://11691035, PR13140
262 void foo(NSPointerArray* pointerArray) {
264 void* p1 = malloc (1024);
266 [pointerArray addPointer:p1];
269 void* p2 = malloc (1024);
271 [pointerArray insertPointer:p2 atIndex:1];
274 void* p3 = malloc (1024);
276 [pointerArray replacePointerAtIndex:1 withPointer:p3];
279 // Freeing the buffer is allowed.
280 void* buffer = [pointerArray pointerAtIndex:0];
284 void noCrashOnVariableArgumentSelector() {
285 NSMutableString *myString = [NSMutableString stringWithString:@"some text"];
286 [myString appendFormat:@"some text = %d", 3];
289 void test12365078_check() {
290 unichar *characters = (unichar*)malloc(12);
291 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
292 if (!string) free(characters); // no-warning
295 void test12365078_nocheck() {
296 unichar *characters = (unichar*)malloc(12);
297 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
300 void test12365078_false_negative() {
301 unichar *characters = (unichar*)malloc(12);
302 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
306 void test12365078_no_malloc(unichar *characters) {
307 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
308 if (!string) {free(characters);}
311 NSString *test12365078_no_malloc_returnValue(unichar *characters) {
312 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
314 return 0; // no-warning
319 void test12365078_nocheck_nomalloc(unichar *characters) {
320 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
321 free(characters); // expected-warning {{Attempt to free non-owned memory}}
324 void test12365078_nested(unichar *characters) {
325 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
327 NSString *string2 = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
329 NSString *string3 = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
331 NSString *string4 = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
339 void test12365078_check_positive() {
340 unichar *characters = (unichar*)malloc(12);
341 NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
342 if (string) free(characters); // expected-warning{{Attempt to free non-owned memory}}
345 void *test_reinterpret_cast_to_block() {
346 // Used to leak because the pointer was disappearing
347 // during the reinterpret_cast.
348 using BlockPtrTy = void (^)();
350 Block* block = static_cast<Block*>(malloc(sizeof(Block)));
351 BlockPtrTy blockPtr = reinterpret_cast<BlockPtrTy>(block); // no-warning