// RUN: %clang_analyze_cc1 -std=c++14 \
// RUN: -analyzer-checker=core,unix.Malloc,cplusplus.NewDelete \
// RUN: -analyzer-checker=unix.MismatchedDeallocator \
// RUN: -verify -fblocks %s
#import "Inputs/system-header-simulator-objc.h"
#import "Inputs/system-header-simulator-for-malloc.h"
// Done with headers. Start testing.
void testNSDatafFreeWhenDoneNoError(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSData *nsdata = [NSData dataWithBytesNoCopy:data length:dataLength];
}
void testNSDataFreeWhenDoneYES(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSData *nsdata = [NSData dataWithBytesNoCopy:data length:dataLength freeWhenDone:1]; // no-warning
}
void testNSDataFreeWhenDoneYES2(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data length:dataLength freeWhenDone:1]; // no-warning
}
void testNSDataFreeWhenDoneYES2_with_wrapper(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
Wrapper *nsdata = [[Wrapper alloc] initWithBytesNoCopy:data length:dataLength]; // no-warning
}
void testNSStringFreeWhenDoneYES3(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSString *nsstr = [[NSString alloc] initWithBytesNoCopy:data length:dataLength encoding:NSUTF8StringEncoding freeWhenDone:1];
}
void testNSStringFreeWhenDoneYES4(NSUInteger dataLength) {
unichar *data = (unichar*)malloc(42);
NSString *nsstr = [[NSString alloc] initWithCharactersNoCopy:data length:dataLength freeWhenDone:1];
free(data); //expected-warning {{Attempt to free non-owned memory}}
}
void testNSStringFreeWhenDoneYES(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSString *nsstr = [[NSString alloc] initWithBytesNoCopy:data length:dataLength encoding:NSUTF8StringEncoding freeWhenDone:1]; // no-warning
}
void testNSStringFreeWhenDoneYES2(NSUInteger dataLength) {
unichar *data = (unichar*)malloc(42);
NSString *nsstr = [[NSString alloc] initWithCharactersNoCopy:data length:dataLength freeWhenDone:1]; // no-warning
}
void testNSDataFreeWhenDoneNO(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSData *nsdata = [NSData dataWithBytesNoCopy:data length:dataLength freeWhenDone:0]; // expected-warning{{leak}}
}
void testNSDataFreeWhenDoneNO2(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data length:dataLength freeWhenDone:0]; // expected-warning{{leak}}
}
void testNSStringFreeWhenDoneNO(NSUInteger dataLength) {
unsigned char *data = (unsigned char *)malloc(42);
NSString *nsstr = [[NSString alloc] initWithBytesNoCopy:data length:dataLength encoding:NSUTF8StringEncoding freeWhenDone:0]; // expected-warning{{leak}}
}
void testNSStringFreeWhenDoneNewDelete(NSUInteger dataLength) {
unsigned char *data = new unsigned char(42);
NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data
length:dataLength freeWhenDone:1];
// expected-warning@-2{{-initWithBytesNoCopy:length:freeWhenDone: cannot take ownership of memory allocated by 'new'}}
}
void testNSStringFreeWhenDoneNewDelete2(NSUInteger dataLength) {
unsigned char *data = new unsigned char(42);
NSData *nsdata = [[NSData alloc] initWithBytesNoCopy:data
length:dataLength
deallocator:^(void *bytes,
NSUInteger length) {
delete (unsigned char *)bytes;
}]; // no-warning
}
void testNSStringFreeWhenDoneNO2(NSUInteger dataLength) {
unichar *data = (unichar*)malloc(42);
NSString *nsstr = [[NSString alloc] initWithCharactersNoCopy:data length:dataLength freeWhenDone:0]; // expected-warning{{leak}}
}
void testOffsetFree() {
int *p = (int *)malloc(sizeof(int));
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()'}}
}
void testRelinquished1() {
void *data = malloc(42);
NSData *nsdata = [NSData dataWithBytesNoCopy:data length:42 freeWhenDone:1];
free(data); // expected-warning {{Attempt to free non-owned memory}}
}
void testRelinquished2() {
void *data = malloc(42);
NSData *nsdata;
free(data);
[NSData dataWithBytesNoCopy:data length:42]; // expected-warning {{Use of memory after it is freed}}
}
@interface My
+ (void)param:(void *)p;
@end
void testUseAfterFree() {
int *p = (int *)malloc(sizeof(int));
free(p);
[My param:p]; // expected-warning{{Use of memory after it is freed}}
}
void testNoCopy() {
char *p = (char *)calloc(1, sizeof(int));
CustomData *w = [CustomData somethingNoCopy:p]; // no-warning
}
void testFreeWhenDone() {
char *p = (char *)calloc(1, sizeof(int));
CustomData *w = [CustomData something:p freeWhenDone:1]; // no-warning
}
void testFreeWhenDonePositive() {
char *p = (char *)calloc(1, sizeof(int));
CustomData *w = [CustomData something:p freeWhenDone:0]; // expected-warning{{leak}}
}
void testFreeWhenDoneNoCopy() {
int *p = (int *)malloc(sizeof(int));
CustomData *w = [CustomData somethingNoCopy:p length:sizeof(int) freeWhenDone:1]; // no-warning
}
void testFreeWhenDoneNoCopyPositive() {
int *p = (int *)malloc(sizeof(int));
CustomData *w = [CustomData somethingNoCopy:p length:sizeof(int) freeWhenDone:0]; // expected-warning{{leak}}
}
// Test CF/NS...NoCopy. PR12100: Pointers can escape when custom deallocators are provided.
void testNSDatafFreeWhenDone(NSUInteger dataLength) {
CFStringRef str;
char *bytes = (char*)malloc(12);
str = CFStringCreateWithCStringNoCopy(0, bytes, NSNEXTSTEPStringEncoding, 0); // no warning
CFRelease(str); // default allocator also frees bytes
}
void stringWithExternalContentsExample(void) {
#define BufferSize 1000
CFMutableStringRef mutStr;
UniChar *myBuffer;
myBuffer = (UniChar *)malloc(BufferSize * sizeof(UniChar));
mutStr = CFStringCreateMutableWithExternalCharactersNoCopy(0, myBuffer, 0, BufferSize, kCFAllocatorNull); // expected-warning{{leak}}
CFRelease(mutStr);
//free(myBuffer);
}
// PR12101 : pointers can escape through custom deallocators set on creation of a container.
void TestCallbackReleasesMemory(CFDictionaryKeyCallBacks keyCallbacks) {
void *key = malloc(12);
void *val = malloc(12);
CFMutableDictionaryRef x = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &keyCallbacks, &kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(x, key, val);
return;// no-warning
}
NSData *radar10976702() {
void *bytes = malloc(10);
return [NSData dataWithBytesNoCopy:bytes length:10]; // no-warning
}
void testBlocks() {
int *x= (int*)malloc(sizeof(int));
int (^myBlock)(int) = ^(int num) {
free(x);
return num;
};
myBlock(3);
}
// Test NSMapInsert.
@interface NSMapTable : NSObject <NSCopying, NSCoding, NSFastEnumeration>
@end
extern void *NSMapGet(NSMapTable *table, const void *key);
extern void NSMapInsert(NSMapTable *table, const void *key, const void *value);
extern void NSMapInsertKnownAbsent(NSMapTable *table, const void *key, const void *value);
char *strdup(const char *s);
NSString * radar11152419(NSString *string1, NSMapTable *map) {
const char *strkey = "key";
NSString *string = ( NSString *)NSMapGet(map, strkey);
if (!string) {
string = [string1 copy];
NSMapInsert(map, strdup(strkey), (void*)string); // no warning
NSMapInsertKnownAbsent(map, strdup(strkey), (void*)string); // no warning
}
return string;
}
// Test that we handle pointer escaping through OSAtomicEnqueue.
typedef volatile struct {
void *opaque1;
long opaque2;
} OSQueueHead;
extern "C" void OSAtomicEnqueue( OSQueueHead *__list, void *__new, size_t __offset) __attribute__((weak_import));
static inline void radar11111210(OSQueueHead *pool) {
void *newItem = malloc(4);
OSAtomicEnqueue(pool, newItem, 4);
}
// Pointer might escape through CGDataProviderCreateWithData
typedef struct CGDataProvider *CGDataProviderRef;
typedef void (*CGDataProviderReleaseDataCallback)(void *info, const void *data,
size_t size);
extern CGDataProviderRef CGDataProviderCreateWithData(void *info,
const void *data, size_t size,
CGDataProviderReleaseDataCallback releaseData)
__attribute__((visibility("default")));
void *calloc(size_t, size_t);
static void releaseDataCallback (void *info, const void *data, size_t size) {
#pragma unused (info, size)
free((void*)data);
}
void testCGDataProviderCreateWithData() {
void* b = calloc(8, 8);
CGDataProviderRef p = CGDataProviderCreateWithData(0, b, 8*8, releaseDataCallback);
}
// Assume that functions which take a function pointer can free memory even if
// they are defined in system headers and take the const pointer to the
// allocated memory.
extern CGDataProviderRef UnknownFunWithCallback(void *info,
const void *data, size_t size,
CGDataProviderReleaseDataCallback releaseData)
__attribute__((visibility("default")));
void testUnknownFunWithCallBack() {
void* b = calloc(8, 8);
CGDataProviderRef p = UnknownFunWithCallback(0, b, 8*8, releaseDataCallback);
}
// Test blocks.
void acceptBlockParam(void *, void (^block)(void *), unsigned);
void testCallWithBlockCallback() {
void *l = malloc(12);
acceptBlockParam(l, ^(void *i) { free(i); }, sizeof(char *));
}
// Test blocks in system headers.
void testCallWithBlockCallbackInSystem() {
void *l = malloc(12);
SystemHeaderFunctionWithBlockParam(l, ^(void *i) { free(i); }, sizeof(char *));
}
// Test escape into NSPointerArray. PR13140
void foo(NSPointerArray* pointerArray) {
void* p1 = malloc (1024);
if (p1) {
[pointerArray addPointer:p1];
}
void* p2 = malloc (1024);
if (p2) {
[pointerArray insertPointer:p2 atIndex:1];
}
void* p3 = malloc (1024);
if (p3) {
[pointerArray replacePointerAtIndex:1 withPointer:p3];
}
// Freeing the buffer is allowed.
void* buffer = [pointerArray pointerAtIndex:0];
free(buffer);
}
void noCrashOnVariableArgumentSelector() {
NSMutableString *myString = [NSMutableString stringWithString:@"some text"];
[myString appendFormat:@"some text = %d", 3];
}
void test12365078_check() {
unichar *characters = (unichar*)malloc(12);
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string) free(characters); // no-warning
}
void test12365078_nocheck() {
unichar *characters = (unichar*)malloc(12);
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
}
void test12365078_false_negative() {
unichar *characters = (unichar*)malloc(12);
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string) {;}
}
void test12365078_no_malloc(unichar *characters) {
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string) {free(characters);}
}
NSString *test12365078_no_malloc_returnValue(unichar *characters) {
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string) {
return 0; // no-warning
}
return string;
}
void test12365078_nocheck_nomalloc(unichar *characters) {
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
free(characters); // expected-warning {{Attempt to free non-owned memory}}
}
void test12365078_nested(unichar *characters) {
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string) {
NSString *string2 = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string2) {
NSString *string3 = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string3) {
NSString *string4 = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (!string4)
free(characters);
}
}
}
}
void test12365078_check_positive() {
unichar *characters = (unichar*)malloc(12);
NSString *string = [[NSString alloc] initWithCharactersNoCopy:characters length:12 freeWhenDone:1];
if (string) free(characters); // expected-warning{{Attempt to free non-owned memory}}
}
void *test_reinterpret_cast_to_block() {
// Used to leak because the pointer was disappearing
// during the reinterpret_cast.
using BlockPtrTy = void (^)();
struct Block {};
Block* block = static_cast<Block*>(malloc(sizeof(Block)));
BlockPtrTy blockPtr = reinterpret_cast<BlockPtrTy>(block); // no-warning
return blockPtr;
}
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