如何清除由于指针错误而导致的崩溃? [英] how to remove crash due to bad pointer?

问题描述

在我的代码中，总是有一些变量会因崩溃而变坏并变成错误的指针.
我该如何解决呢?

Hi, in my code there are variables which always lead to crash because they get corrupted and become bad pointers.
How to i resolve this ?

推荐答案

解决这一问题的一些方法是:

-不要写进程不归您所有的内存
-确保不要超出缓冲区末尾
-初始化所有内容
-使用标准算法访问集合

-不要手动管理内存，这是近来的杯子游戏
-使用std :: vector，std :: shared_ptr和std :: unique_ptr代替原始指针

基本上不要违反语言的规则或习惯用法，就可以了.

Some ways of resolving this one are:

- don''t to write to memory that your process doesn''t own by
- making sure you don''t write beyond the end of buffers
- initialising everything
- use standard algorithms to access collections

- don''t manually manage memory, it''s a mugs game these days
- use std::vector, std::shared_ptr and std::unique_ptr instead of raw pointers

Basically don''t break the rules or idioms of the language and you''ll be okay.

在使用前必须对拥有的指针进行初始化(1)和验证(2) (3):)

An owned pointer has to be initialized (1) and validated (2) bofore its usage (3) :)

class B
{
public:
  void f();
};

class A
{
  B* m_pcB;

public:
  A() : m_pcB(NULL /*1*/) {}
  //..

  void UseB() { if (m_pcB /*2*/) m_pcB->f(/*3*/); }
  void ResetB() { if (m_pcB /*2*/) { delete m_pcB /*3*/; m_pcB = NULL /*1*/} }
  //..
}

所有(拥有和未拥有的)指针都应在使用前进行验证.

All (owned and not owned) pointers should be validated before their usage.

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