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92 lines
1.3 KiB
92 lines
1.3 KiB
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 A : NSObject
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@end
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@implementation A {
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void (^_block_field)(void);
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}
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- (void)doSomethingThenCallback:( void(^)(void) ) my_block
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{
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// null dereference, segfault
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my_block();
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}
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- (void) foo {
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void (^my_block)(void)=^() {};
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my_block = NULL;
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my_block(); // Null deref
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}
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- foo2: ( void(^)(void) ) my_block {
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// ok to call this block!
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if(my_block != nil) {
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my_block();
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}
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}
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- (void) foo3: ( void(^)(void) ) my_block {
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my_block = NULL;
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my_block(); //Null deref
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}
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- (void) foo4: ( void(^)(void) ) my_block_param {
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void (^my_block)(void)=^() {};
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my_block = NULL;
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my_block_param = my_block;
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my_block_param(); //Null deref
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}
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- (void) foo5: ( void(^)(void) ) my_block_param {
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void (^my_block)(void)=^() {};
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my_block_param = my_block;
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my_block_param(); //No error here
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}
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- (void) foo6: (BOOL)a block_param: ( void (^)(void)) block_param {
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void (^my_block)(void)=^() {
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if (block_param)
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block_param(); //No error here
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};
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if (a){
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[self foo2: ^() {
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my_block(); // No error here
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}];
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}
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}
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- (void) foo7 {
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_block_field(); // Ivar not nullable
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}
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@end
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