101 lines
3.0 KiB
Plaintext
101 lines
3.0 KiB
Plaintext
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// RUN: %clang_analyze_cc1 -analyzer-checker=core,nullability -verify %s
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#define nil 0
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@protocol NSObject
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+ (id)alloc;
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- (id)init;
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- (instancetype)autorelease;
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- (void)release;
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@end
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__attribute__((objc_root_class))
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@interface
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NSObject<NSObject>
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@end
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@interface TestObject : NSObject
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@end
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TestObject *_Nonnull returnsNilObjCInstanceIndirectly() {
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TestObject *local = nil;
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return local; // expected-warning {{nil returned from a function that is expected to return a non-null value}}
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}
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TestObject * _Nonnull returnsNilObjCInstanceIndirectlyWithSupressingCast() {
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TestObject *local = nil;
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return (TestObject * _Nonnull)local; // no-warning
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}
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TestObject * _Nonnull returnsNilObjCInstanceDirectly() {
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// The first warning is from Sema. The second is from the static analyzer.
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return nil; // expected-warning {{null returned from function that requires a non-null return value}}
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// expected-warning@-1 {{nil returned from a function that is expected to return a non-null value}}
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}
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TestObject * _Nonnull returnsNilObjCInstanceDirectlyWithSuppressingCast() {
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return (TestObject * _Nonnull)nil; // no-warning
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}
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void testObjCNonARCNoInitialization(TestObject * _Nonnull p) {
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TestObject * _Nonnull implicitlyZeroInitialized; // no-warning
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implicitlyZeroInitialized = p;
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}
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void testObjCNonARCExplicitZeroInitialization() {
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TestObject * _Nonnull explicitlyZeroInitialized = nil; // expected-warning {{nil assigned to a pointer which is expected to have non-null value}}
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}
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@interface ClassWithInitializers : NSObject
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@end
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@implementation ClassWithInitializers
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- (instancetype _Nonnull)initWithNonnullReturnAndSelfCheckingIdiom {
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// This defensive check is a common-enough idiom that we don't want
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// to issue a diagnostic for it.
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if (self = [super init]) {
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}
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return self; // no-warning
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}
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- (instancetype _Nonnull)initWithNonnullReturnAndNilReturnViaLocal {
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self = [super init];
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// This leaks, but we're not checking for that here.
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ClassWithInitializers *other = nil;
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// False negative. Once we have more subtle suppression of defensive checks in
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// initializers we should warn here.
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return other;
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}
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- (instancetype _Nonnull)initWithPreconditionViolation:(int)p {
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self = [super init];
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if (p < 0) {
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[self release];
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return (ClassWithInitializers * _Nonnull)nil;
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}
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return self;
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}
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+ (instancetype _Nonnull)factoryCallingInitWithNonnullReturnAndSelfCheckingIdiom {
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return [[[self alloc] initWithNonnullReturnAndSelfCheckingIdiom] autorelease]; // no-warning
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}
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+ (instancetype _Nonnull)factoryCallingInitWithNonnullReturnAndNilReturnViaLocal {
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return [[[self alloc] initWithNonnullReturnAndNilReturnViaLocal] autorelease]; // no-warning
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}
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+ (instancetype _Nonnull)initWithPreconditionViolation:(int) p {
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return [[[self alloc] initWithPreconditionViolation:p] autorelease]; // no-warning
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}
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- (TestObject * _Nonnull) returnsNil {
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return (TestObject * _Nonnull)nil;
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}
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- (TestObject * _Nonnull) inlineOfReturnsNilObjCInstanceDirectlyWithSuppressingCast {
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TestObject *o = [self returnsNil];
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return o;
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}
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@end
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