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63 lines
1001 B
63 lines
1001 B
10 years ago
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/*
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* Copyright (c) 2014 - Facebook.
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* All rights reserved.
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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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