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

From: Peter Zijlstra
Date: Wed Jan 20 2010 - 04:58:34 EST

On Wed, 2010-01-20 at 11:43 +0200, Avi Kivity wrote:
> 1. Write a trace entry into shared memory, trap into the kernel on overflow.
> 2. Trap if a condition is satisfied (fast watchpoint implementation).

So now you want to consume more of a process' address space to store
trace data as well? Not to mention that that process could wreck the
trace data rendering it utterly unreliable.

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