了解崩溃日志 - KERN_PROTECTION_FAILURE
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【中文标题】了解崩溃日志 - KERN_PROTECTION_FAILURE【英文标题】：understanding a crash log - KERN_PROTECTION_FAILURE 【发布时间】：2011-12-25 08:18:35 【问题描述】：我正在尝试解决在我的应用程序使用过程中在不同时间点时不时发生不可预测的崩溃。 我非常感谢任何帮助，因为我对它可能是什么感到迷茫，我确实转换为 ARC 并在需要的地方使用了@AutoReleasePool，但我仍然不时得到这个......
日期/时间：2011-11-09 11:30:40.661 +0100 操作系统版本：iPhone OS 5.0 (9A334) 报告版本：104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_PROTECTION_FAILURE at 0x2fd74da8
Crashed Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 CoreFoundation 0x36e1e786 -[NSArray isEqualToArray:] + 14
1 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
2 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
3 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
4 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
5 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
6 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
7 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
8 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
9 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
10 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
11 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
12 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
13 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
14 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
15 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
16 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
17 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
18 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
19 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
20 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
21 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
22 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
23 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
24 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
25 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
26 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
27 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
28 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
29 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
30 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
31 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
32 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
33 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
34 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
35 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
36 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
37 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
38 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
39 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
40 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
41 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
42 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
43 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
44 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
45 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
46 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
47 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
48 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
49 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
50 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
51 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
52 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
53 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
54 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
55 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
56 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
57 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
58 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
59 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
60 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
61 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
62 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
63 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
64 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
65 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
66 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
67 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
68 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
69 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
70 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
71 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
72 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
73 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
74 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
75 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
76 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
77 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
78 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
79 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
80 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
81 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
82 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
83 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
84 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
85 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
86 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
87 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
88 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
89 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
90 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
91 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
92 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
93 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
94 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
95 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
96 CoreFoundation 0x36e1e876 -[NSArray isEqualToArray:] + 254
97 CoreFoundation 0x36e271cc -[NSArray isEqual:] + 64
98 CoreFoundation 0x36e1ef7e -[NSDictionary isEqualToDictionary:] + 310
99 CoreFoundation 0x36e27d9c -[NSDictionary isEqual:] + 64
100 CoreFoundation 0x36e27d40 -[__NSCFDictionary isEqual:] + 48
这个线程继续使用相同的语法大约 300 行...
【问题讨论】：
看起来像堆栈溢出 - 在您的应用程序中得到任何递归 - 任何嵌套在自身内部的数组或字典等。 【参考方案1】：没有代码可以查看最好的猜测是一个方法正在递归地调用自己，直接或间接地并且没有到达终止。 NSDictionary 或 NSArray 中可能有一个条目引用回自身。
如果可能，请尝试在 Xcode 中暂停执行，以了解代码中发生这种情况的位置。
发布一些代码。
【讨论】：
我很乐意，但我的应用程序相当大 - 代码方面，你能告诉我代码的哪一部分是相关的吗？ 尝试在 Xcode 中暂停以了解代码。在代码中放置 NSLog 和/或断点以定位问题区域。查找正在枚举或处理NSDictionary 或NSArray 的区域。
+1 表示“可能在 NSDictionary 或 NSArray 中有一个条目引用回自身”。我确信这就是这里发生的事情。以上是关于了解崩溃日志 - KERN_PROTECTION_FAILURE的主要内容，如果未能解决你的问题，请参考以下文章