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https://github.com/Gericom/teak-llvm.git
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59428d182f
The analyzer now realizes that C++ std::initializer_list objects and Objective-C boxed structure/array/dictionary expressions can potentially maintain a reference to the objects that were put into them. This avoids false memory leak posivites and a few other issues. This is a conservative behavior; for now, we do not model what actually happens to the objects after being passed into such initializer lists. rdar://problem/32918288 Differential Revision: https://reviews.llvm.org/D35216 llvm-svn: 314975
93 lines
2.8 KiB
Objective-C
93 lines
2.8 KiB
Objective-C
// RUN: %clang_analyze_cc1 -Wno-objc-literal-conversion -analyzer-checker=core,unix.Malloc,osx.cocoa.NonNilReturnValue,debug.ExprInspection -analyzer-store=region -verify %s
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void clang_analyzer_eval(int);
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typedef signed char BOOL;
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typedef long NSInteger;
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typedef unsigned long NSUInteger;
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@protocol NSObject
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@end
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@interface NSObject <NSObject> {}
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@end
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@protocol NSCopying
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@end
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@protocol NSCoding
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@end
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@interface NSString @end
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@interface NSString (NSStringExtensionMethods)
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+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
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@end
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@interface NSNumber
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+ (NSNumber *)numberWithChar:(char)value;
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+ (NSNumber *)numberWithUnsignedChar:(unsigned char)value;
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+ (NSNumber *)numberWithShort:(short)value;
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+ (NSNumber *)numberWithUnsignedShort:(unsigned short)value;
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+ (NSNumber *)numberWithInt:(int)value;
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+ (NSNumber *)numberWithUnsignedInt:(unsigned int)value;
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+ (NSNumber *)numberWithLong:(long)value;
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+ (NSNumber *)numberWithUnsignedLong:(unsigned long)value;
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+ (NSNumber *)numberWithLongLong:(long long)value;
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+ (NSNumber *)numberWithUnsignedLongLong:(unsigned long long)value;
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+ (NSNumber *)numberWithFloat:(float)value;
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+ (NSNumber *)numberWithDouble:(double)value;
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+ (NSNumber *)numberWithBool:(BOOL)value;
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+ (NSNumber *)numberWithInteger:(NSInteger)value ;
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+ (NSNumber *)numberWithUnsignedInteger:(NSUInteger)value ;
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@end
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@interface NSValue : NSObject <NSCopying, NSCoding>
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- (void)getValue:(void *)value;
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+ (NSValue *)valueWithBytes:(const void *)value
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objCType:(const char *)type;
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@end
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typedef typeof(sizeof(int)) size_t;
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extern void *malloc(size_t);
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extern void free(void *);
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extern char *strdup(const char *str);
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id constant_string() {
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return @("boxed constant string.");
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}
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id dynamic_string() {
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return @(strdup("boxed dynamic string")); // expected-warning{{Potential memory leak}}
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}
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typedef struct __attribute__((objc_boxable)) {
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const char *str;
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} BoxableStruct;
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id leak_within_boxed_struct() {
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BoxableStruct bs;
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bs.str = strdup("dynamic string"); // The duped string shall be owned by val.
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NSValue *val = @(bs); // no-warning
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return val;
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}
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id leak_of_boxed_struct() {
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BoxableStruct *bs = malloc(sizeof(BoxableStruct)); // The pointer stored in bs isn't owned by val.
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NSValue *val = @(*bs); // expected-warning{{Potential leak of memory pointed to by 'bs'}}
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return val;
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}
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id const_char_pointer(int *x) {
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if (x)
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return @(3);
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return @(*x); // expected-warning {{Dereference of null pointer (loaded from variable 'x')}}
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}
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void checkNonNil() {
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clang_analyzer_eval(!!@3); // expected-warning{{TRUE}}
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clang_analyzer_eval(!!@(3+4)); // expected-warning{{TRUE}}
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clang_analyzer_eval(!!@(57.0)); // expected-warning{{TRUE}}
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const char *str = "abc";
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clang_analyzer_eval(!!@(str)); // expected-warning{{TRUE}}
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clang_analyzer_eval(!!@__objc_yes); // expected-warning{{TRUE}}
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}
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