SIGSEGV不同code

最新推荐文章于 2023-05-13 17:35:42 发布

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最新推荐文章于 2023-05-13 17:35:42 发布

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本文解释了两种常见的SIGSEGV信号错误：SEGV_MAPERR表示尝试访问未映射的地址；SEGV_ACCERR表示尝试访问无权限的地址。这两种情况都涉及到非法内存访问问题。

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signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 41963214 signal 11 (SIGSEGV), code 2 (SEGV_ACCERR), fault addr 4006e000

SEGV_MAPERR means you tried to access an address that doesn't map to anything.

SEGV_ACCERR means you tried to access an address that you don't have permission to access.

So in both cases you accessed an address you shouldn't have, which is probably the only thing your actual code is guilty of. In the former case there's no memory in that address range anyway. In the latter case there is memory in that address range but you don't own it.

If you were to access a random address then which you get depends on how the OS happens to have your process set up at that moment.