硬件断点和软件断点有什么区别? [英] What is the difference between hardware and software breakpoints?

问题描述

What is the difference between hardware and software breakpoints?

Are hardware breakpoints are said to be faster than software breakpoints, if yes then how, and also then why would we need the software breakpoints at all?

解决方案

This article provides a good discussion of pros and cons: http://www.nynaeve.net/?p=80

To answer your question directly software breakpoints are more flexible because hardware breakpoints are limited in some functionality and highly architecture-dependant. One example given in the article is that x86 hardware has a limit of 4 hardware breakpoints.

Hardware breakpoints are faster because they have dedicated registers and less overhead than software breakpoints.

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