SEGV_ACCERR是什么意思? [英] What does SEGV_ACCERR mean?

问题描述

我正在检查一些由于SEGV_ACCERR的原因而都发出信号SIGSEGV的崩溃.搜索SEGV_ACCERR后，我发现与人类可读的解释最接近的是:对象的无效权限

I am examining a few crashes that all have the signal SIGSEGV with the reason SEGV_ACCERR. After searching for SEGV_ACCERR, the closest thing I have found to a human readable explanation is: Invalid Permissions for object

从更一般的意义上讲，这意味着什么? SEGV_ACCERR什么时候出现?出于这个原因，是否有更具体的文档?

What does this mean in a more general sense? When would a SEGV_ACCERR arise? Is there more specific documentation on this reason?

推荐答案

这是我在64位iOS设备上最常见的错误，如果多个线程读取并更改了ARC下的变量，则可能会发生此错误.例如，我今天修复了一个崩溃，该崩溃导致多个后台线程正在读取并使用静态NSDate和NSString变量并在不进行任何锁定或排队的情况下对其进行更新.

This is an error that I have mostly seen on 64 bit iOS devices and can happen if multiple threads read and change a variable under ARC. For example, I fixed a crash today where multiple background threads were reading and using a static NSDate and NSString variable and updating them without doing any kind of locking or queueing.

在多个崩溃日志中多次看到，在多个线程上使用核心数据对象也会导致此崩溃.

Using core data objects on multiple threads can also cause this crash, as I have seen many times in my crash logs.

我也使用Crittercism，这次崩溃是SEGV_ACCERR，它仅影响64位设备.

I also use Crittercism, and this particular crash was a SEGV_ACCERR that only affected 64 bit devices.

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