Speakers
Indu Bhagat
Steven Rostedt
Description
sframes have been added to binutiles, which can allow the kernel to do a user space stack trace without the need of frame pointers. But there are several issues to overcome.
- Requires reading user space that can fault (cannot be done in interrupt context)
- Perf and ftrace will need to postpone when the stack trace is done
- Can load in the sframe information from the elf file, but what to do about dynamically linked objects? (New system call?)
- Same issue with JIT code. Need a way to tell the kernel how to do the stack trace dynamically.
