Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP)

From: Avi Kivity
Date: Wed Jan 20 2010 - 07:24:43 EST

On 01/20/2010 12:45 PM, Srikar Dronamraju wrote:
What does the code in the jumped-to vma do?
1. Write a trace entry into shared memory, trap into the kernel on overflow.
2. Trap if a condition is satisfied (fast watchpoint implementation).
That looks to be a nice idea. We should certainly look into this
possibility. However can we look at this option probably a little later?

Our plan was to do one step at a time i.e have the basic uprobes in
first and target the booster (i.e jump to the next instruction without
the need for single-stepping next).

We could look at this option of using jump instead of int3 after we are
done with the booster. Hope that's okay.

I'm all for incremental development and merging, as long as we keep the interfaces flexible enough for the future.

error compiling committee.c: too many arguments to function

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