只读存储器和堆存储器 [英] read-only memory and heap memory

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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