forked from OSchip/llvm-project
138 lines
3.1 KiB
Objective-C
138 lines
3.1 KiB
Objective-C
// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-config suppress-null-return-paths=false -verify %s
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// RUN: %clang_cc1 -analyze -analyzer-checker=core -verify -DSUPPRESSED=1 %s
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// RUN: %clang_cc1 -analyze -analyzer-checker=core -fobjc-arc -verify -DSUPPRESSED=1 %s
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// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-config avoid-suppressing-null-argument-paths=true -DSUPPRESSED=1 -DNULL_ARGS=1 -verify %s
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#define ARC __has_feature(objc_arc)
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#if defined(SUPPRESSED) && !ARC
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// expected-no-diagnostics
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#endif
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@interface PointerWrapper
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- (int *)getPtr;
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- (id)getObject;
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@end
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id getNil() {
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return 0;
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}
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void testNilReceiverHelperA(int *x) {
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*x = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Dereference of null pointer}}
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#endif
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}
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void testNilReceiverHelperB(int *x) {
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*x = 1;
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// FIXME: Suppression for this case isn't working under ARC. It should.
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#if !defined(SUPPRESSED) || (defined(SUPPRESSED) && ARC)
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// expected-warning@-3 {{Dereference of null pointer}}
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#endif
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}
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void testNilReceiver(int coin) {
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id x = getNil();
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if (coin)
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testNilReceiverHelperA([x getPtr]);
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else
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testNilReceiverHelperB([[x getObject] getPtr]);
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}
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// FALSE NEGATIVES (over-suppression)
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__attribute__((objc_root_class))
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@interface SomeClass {
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int ivar;
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}
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-(int *)methodReturningNull;
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@property(readonly) int *propertyReturningNull;
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@property(readonly) int *synthesizedProperty;
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@property(readonly) SomeClass *propertyReturningNil;
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@end
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@interface SubOfSomeClass : SomeClass
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@end
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@implementation SubOfSomeClass
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@end
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@implementation SomeClass
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-(int *)methodReturningNull {
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return 0;
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}
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-(int *)propertyReturningNull {
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return 0;
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}
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-(SomeClass *)propertyReturningNil {
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return 0;
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}
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+(int *)classPropertyReturningNull {
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return 0;
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}
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@end
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void testMethodReturningNull(SomeClass *sc) {
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int *result = [sc methodReturningNull];
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*result = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Dereference of null pointer}}
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#endif
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}
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void testPropertyReturningNull(SomeClass *sc) {
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int *result = sc.propertyReturningNull;
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*result = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Dereference of null pointer}}
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#endif
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}
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@implementation SubOfSomeClass (ForTestOfSuperProperty)
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-(void)testSuperPropertyReturningNull {
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int *result = super.propertyReturningNull;
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*result = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Dereference of null pointer}}
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#endif
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}
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@end
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void testClassPropertyReturningNull() {
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int *result = SomeClass.classPropertyReturningNull;
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*result = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Dereference of null pointer}}
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#endif
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}
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@implementation SomeClass (ForTestOfPropertyReturningNil)
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void testPropertyReturningNil(SomeClass *sc) {
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SomeClass *result = sc.propertyReturningNil;
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result->ivar = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Access to instance variable 'ivar' results in a dereference of a null pointer (loaded from variable 'result')}}
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#endif
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}
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@end
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void testSynthesizedPropertyReturningNull(SomeClass *sc) {
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if (sc.synthesizedProperty)
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return;
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int *result = sc.synthesizedProperty;
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*result = 1;
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#ifndef SUPPRESSED
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// expected-warning@-2 {{Dereference of null pointer}}
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#endif
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}
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