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63 lines
1.1 KiB
63 lines
1.1 KiB
/*
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* Copyright (c) 2014-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <Foundation/NSObject.h>
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@interface Fraction : NSObject {
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int numerator;
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int denominator;
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}
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- (void)setNumerator:(int)n;
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- (void)setDenominator:(int)d;
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- (int)getNumerator;
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- (int)getDenominator;
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@end
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@implementation Fraction
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- (void)setNumerator:(int)n {
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numerator = n;
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}
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- (void)setDenominator:(int)d {
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denominator = d;
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}
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- (int)getNumerator {
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return numerator;
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}
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- (int)getDenominator {
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return denominator;
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}
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@end
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Fraction* Fraction_create() {
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Fraction* f = NULL;
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return f;
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}
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int null_deref_objc_class() {
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Fraction* fraction = Fraction_create();
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[fraction setNumerator:5];
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return 0;
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}
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void test_virtual_call() {
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id* fraction = [Fraction alloc];
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// virtual call: the type of fraction is obtained from the allocation
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[fraction setNumerator:5];
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if ([fraction getNumerator] != 4) {
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// unreachable
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int* x = NULL;
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*x = 0;
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}
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[fraction release];
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}
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