只读存储器和堆存储器

只读存储器和堆存储器

本文介绍了只读存储器和堆存储器的处理方法,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

据我所知,字符串存储在只读存储器中的C语言的情况下。
这是哪里实际上美元的硬件p $ psent。

AFAIK, string literals are stored in read only memory in case of C language.where is this actually present on the hardware.

根据我所知堆是RAM.correct我,如果我错了。

as per my knowledge heap is on RAM.correct me if i am wrong.

如何从不同的只读内存是堆?

how different is heap from read only memory?

是取决于操作系统?

推荐答案

它通常与硬件辅助完成。

It is usually done with hardware assistance.

硬件的虚拟内存子系统可以告诉标记页面为只读。当应用程序试图写一个只读页面,硬件生成故障的操作系统捕获。操作系统可以告诉应用程序试图写一个只读页面并结束程序。

The virtual memory subsystem of the hardware can be told to mark a page as read-only. When an application tries to write a read-only page, the hardware generates a fault that the OS catches. The OS can tell that the app tried to write a read-only page and end your program.

因此​​,OS /加载程序确保字符串文字在被标记为只读的页面。

So the OS/loader makes sure the pages the string literals are in are marked as read-only.

堆和只读存储器是正交的问题。

The heap and read-only memory are orthogonal issues.

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08-19 22:26