Kernel Korner - Kprobes—a Kernel Debugger

Looking for a way to use some of the same debugging techniques in the kernel that you apply in user-space code? Here's how to bring debugging support to tricky kernel development problems.
Conclusion

The Kprobes patch helps a kernel developer debug any address within the kernel. Various patches are available from the Kprobes home page, including ones for setting watch points and for debugging user address locations. With proper use, Kprobes can become a powerful weapon in any kernel developer's arsenal.

Acknowledgements

I am thankful to Richard J Moore and Andrew Morton for their valuable comments on the draft version of this article, to Manish P Fadnavis for his support and to Pramode C E, Shine Mohammed Jabbar and Chitkala Sethuraman for their feedback.

Resources for this article: /article/8136.

R. Krishnakumar loves to hack the Linux kernel. He works for Hewlett-Packard and received a bachelor's in Technology from Govt. Engg. College Thrissur. His home page is located at puggy.symonds.net/~krishnakumar. You can reach him at rkrishnakumar@gmail.com.

______________________

Comments

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Thank you Krishnakumar

Anonymous's picture

This is a very clear article about non-intrusive debug. This article enlighten me a lot and this is starting point for my current project (building a hot-patching framework)

White Paper
Linux Management with Red Hat Satellite: Measuring Business Impact and ROI

Linux has become a key foundation for supporting today's rapidly growing IT environments. Linux is being used to deploy business applications and databases, trading on its reputation as a low-cost operating environment. For many IT organizations, Linux is a mainstay for deploying Web servers and has evolved from handling basic file, print, and utility workloads to running mission-critical applications and databases, physically, virtually, and in the cloud. As Linux grows in importance in terms of value to the business, managing Linux environments to high standards of service quality — availability, security, and performance — becomes an essential requirement for business success.

Learn More

Sponsored by Red Hat

White Paper
Private PaaS for the Agile Enterprise

If you already use virtualized infrastructure, you are well on your way to leveraging the power of the cloud. Virtualization offers the promise of limitless resources, but how do you manage that scalability when your DevOps team doesn’t scale? In today’s hypercompetitive markets, fast results can make a difference between leading the pack vs. obsolescence. Organizations need more benefits from cloud computing than just raw resources. They need agility, flexibility, convenience, ROI, and control.

Stackato private Platform-as-a-Service technology from ActiveState extends your private cloud infrastructure by creating a private PaaS to provide on-demand availability, flexibility, control, and ultimately, faster time-to-market for your enterprise.

Learn More

Sponsored by ActiveState