From the course: Linux Device Drivers
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Use tracing and debugging - Linux Tutorial
From the course: Linux Device Drivers
Use tracing and debugging
- [Instructor] Let's talk tracing and debugging, getting information about our motor code, our driver code. We want to talk about the debug file system, so we could talk about tracing, also briefly talk about BPF, BPF trace tool in particular, and we'll talk about the crash tool. The debug file system is yet another virtual file system. It's usually mounted on your system at sys, kernel, debug. There's lots of stuff there. You can use it for your own code. Essentially it's a place to put virtual files that can be helpful with debugging. And there's a bunch of standard stuff there. There's lots and lots of stuff, thousands of things there. So you can look around and find some stuff that you might find helpful and we're going to look at tracing that's under there. And in the kernel source tree, you can look at the debugfs.text file to get more information about it. To do tracing of functions in the kernel, we'll use…
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