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Diffstat (limited to 'clang/test/Analysis/retain-release-path-notes-gc.m')
| -rw-r--r-- | clang/test/Analysis/retain-release-path-notes-gc.m | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/clang/test/Analysis/retain-release-path-notes-gc.m b/clang/test/Analysis/retain-release-path-notes-gc.m new file mode 100644 index 0000000..1e74f00 --- /dev/null +++ b/clang/test/Analysis/retain-release-path-notes-gc.m @@ -0,0 +1,73 @@ +// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,osx.coreFoundation.CFRetainRelease,osx.cocoa.ClassRelease,osx.cocoa.RetainCount -analyzer-store=region -analyzer-output=text -fobjc-gc-only -verify %s + +/*** +This file is for testing the path-sensitive notes for retain/release errors. +Its goal is to have simple branch coverage of any path-based diagnostics, +not to actually check all possible retain/release errors. + +This file is for notes that only appear in a GC-enabled analysis. +Non-specific and ref-count-only notes should go in retain-release-path-notes.m. +***/ + +@interface NSObject ++ (id)alloc; +- (id)init; +- (void)dealloc; + +- (Class)class; + +- (id)retain; +- (void)release; +- (void)autorelease; +@end + +@interface Foo : NSObject +- (id)methodWithValue; +@property(retain) id propertyValue; +@end + +typedef struct CFType *CFTypeRef; +CFTypeRef CFRetain(CFTypeRef); +void CFRelease(CFTypeRef); + +id NSMakeCollectable(CFTypeRef); +CFTypeRef CFMakeCollectable(CFTypeRef); + +CFTypeRef CFCreateSomething(); +CFTypeRef CFGetSomething(); + + +void creationViaCFCreate () { + CFTypeRef leaked = CFCreateSomething(); // expected-warning{{leak}} expected-note{{Call to function 'CFCreateSomething' returns a Core Foundation object with a +1 retain count. Core Foundation objects are not automatically garbage collected}} + return; // expected-note{{Object leaked: object allocated and stored into 'leaked' is not referenced later in this execution path and has a retain count of +1}} +} + +void makeCollectable () { + CFTypeRef leaked = CFCreateSomething(); // expected-warning{{leak}} expected-note{{Call to function 'CFCreateSomething' returns a Core Foundation object with a +1 retain count. Core Foundation objects are not automatically garbage collected}} + CFRetain(leaked); // expected-note{{Reference count incremented. The object now has a +2 retain count}} + CFMakeCollectable(leaked); // expected-note{{In GC mode a call to 'CFMakeCollectable' decrements an object's retain count and registers the object with the garbage collector. An object must have a 0 retain count to be garbage collected. After this call its retain count is +1}} + NSMakeCollectable(leaked); // expected-note{{In GC mode a call to 'NSMakeCollectable' decrements an object's retain count and registers the object with the garbage collector. Since it now has a 0 retain count the object can be automatically collected by the garbage collector}} + CFRetain(leaked); // expected-note{{Reference count incremented. The object now has a +1 retain count. The object is not eligible for garbage collection until the retain count reaches 0 again}} + return; // expected-note{{Object leaked: object allocated and stored into 'leaked' is not referenced later in this execution path and has a retain count of +1}} +} + +void retainReleaseIgnored () { + id object = [[NSObject alloc] init]; // expected-note{{Method returns an Objective-C object with a +0 retain count}} + [object retain]; // expected-note{{In GC mode the 'retain' message has no effect}} + [object release]; // expected-note{{In GC mode the 'release' message has no effect}} + [object autorelease]; // expected-note{{In GC mode an 'autorelease' has no effect}} + CFRelease((CFTypeRef)object); // expected-warning{{Incorrect decrement of the reference count of an object that is not owned at this point by the caller}} expected-note{{Incorrect decrement of the reference count of an object that is not owned at this point by the caller}} +} + +@implementation Foo (FundamentalRuleUnderGC) +- (id)getViolation { + id object = (id) CFCreateSomething(); // expected-warning{{leak}} expected-note{{Call to function 'CFCreateSomething' returns a Core Foundation object with a +1 retain count. Core Foundation objects are not automatically garbage collected}} + return object; // expected-note{{Object returned to caller as an owning reference (single retain count transferred to caller)}} expected-note{{Object leaked: object allocated and stored into 'object' and returned from method 'getViolation' is potentially leaked when using garbage collection. Callers of this method do not expect a returned object with a +1 retain count since they expect the object to be managed by the garbage collector}} +} + +- (id)copyViolation { + id object = (id) CFCreateSomething(); // expected-warning{{leak}} expected-note{{Call to function 'CFCreateSomething' returns a Core Foundation object with a +1 retain count. Core Foundation objects are not automatically garbage collected}} + return object; // expected-note{{Object returned to caller as an owning reference (single retain count transferred to caller)}} expected-note{{Object leaked: object allocated and stored into 'object' and returned from method 'copyViolation' is potentially leaked when using garbage collection. Callers of this method do not expect a returned object with a +1 retain count since they expect the object to be managed by the garbage collector}} +} +@end + |