什么导致 SIGSEGV

本文介绍了什么导致 SIGSEGV的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要知道分段错误(SIGSEGV)的根本原因，以及如何处理它.

I need to know the root cause of the segmentation fault (SIGSEGV), and how to handle it.

推荐答案

维基百科有答案，以及许多其他来源.

Wikipedia has the answer, along with a number of other sources.

段错误基本上意味着您对指针做了坏事.这可能是一个段错误:

A segfault basically means you did something bad with pointers. This is probably a segfault:

char *c = NULL; ... *c; // dereferencing a NULL pointer

或者这个:

char *c = "Hello"; ... c[10] = 'z'; // out of bounds, or in this case, writing into read-only memory

或者这样:

char *c = new char[10]; ... delete [] c; ... c[2] = 'z'; // accessing freed memory

每种情况下的基本原则相同 - 你正在用不属于你的记忆做某事.

Same basic principle in each case - you're doing something with memory that isn't yours.