| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,osx.cocoa.ObjCGenerics -verify %s |
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| 2 | |
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| 3 | #if !__has_feature(objc_generics) |
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| 4 | # error Compiler does not support Objective-C generics? |
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| 5 | #endif |
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| 6 | |
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| 7 | typedef __typeof(sizeof(int)) size_t; |
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| 8 | void *memset(void *, int, size_t); |
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| 9 | |
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| 10 | #define nil 0 |
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| 11 | typedef unsigned long NSUInteger; |
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| 12 | typedef int BOOL; |
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| 13 | |
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| 14 | @protocol NSCopying |
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| 15 | @end |
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| 16 | |
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| 17 | __attribute__((objc_root_class)) |
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| 18 | @interface NSObject |
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| 19 | - (void) myFunction:(int*)p myParam:(int) n; |
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| 20 | @end |
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| 21 | |
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| 22 | @interface MyType : NSObject <NSCopying> |
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| 23 | - (void) myFunction:(int*)p myParam:(int) n; |
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| 24 | @end |
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| 25 | |
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| 26 | @interface NSArray<ObjectType> : NSObject |
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| 27 | - (void) init; |
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| 28 | - (BOOL)contains:(ObjectType)obj; |
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| 29 | - (ObjectType)getObjAtIndex:(NSUInteger)idx; |
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| 30 | - (ObjectType)objectAtIndexedSubscript:(NSUInteger)idx; |
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| 31 | @property(readonly) ObjectType firstObject; |
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| 32 | @end |
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| 33 | |
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| 34 | @implementation NSObject |
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| 35 | - (void) myFunction:(int*)p myParam:(int) n { |
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| 36 | (void)*p;// no warning |
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| 37 | } |
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| 38 | @end |
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| 39 | |
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| 40 | @implementation MyType |
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| 41 | - (void) myFunction:(int*)p myParam:(int) n { |
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| 42 | int i = 5/n; // expected-warning {{}} |
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| 43 | (void)i; |
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| 44 | } |
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| 45 | @end |
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| 46 | |
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| 47 | void testReturnType(NSArray<MyType *> *arr) { |
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| 48 | NSArray *erased = arr; |
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| 49 | NSObject *element = [erased firstObject]; |
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| 50 | // TODO: myFunction currently dispatches to NSObject. Make it dispatch to |
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| 51 | // MyType instead! |
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| 52 | [element myFunction:0 myParam:0 ]; |
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| 53 | } |
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| 54 | |
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| 55 | void testArgument(NSArray<MyType *> *arr, id element) { |
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| 56 | NSArray *erased = arr; |
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| 57 | [erased contains: element]; |
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| 58 | // TODO: myFunction currently is not dispatched to MyType. Make it dispatch to |
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| 59 | // MyType! |
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| 60 | [element myFunction:0 myParam:0 ]; |
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| 61 | } |
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| 62 | |
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| 63 | // Do not try this at home! The analyzer shouldn't crash though when it |
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| 64 | // tries to figure out the dynamic type behind the alloca's return value. |
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| 65 | void testAlloca(size_t NSArrayClassSizeWeKnowSomehow) { |
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| 66 | NSArray *arr = __builtin_alloca(NSArrayClassSizeWeKnowSomehow); |
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| 67 | memset(arr, 0, NSArrayClassSizeWeKnowSomehow); |
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| 68 | [arr init]; // no-crash |
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| 69 | } |
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| 70 | |
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