On 2015/07/06 18:03, Will Deacon wrote: > On Mon, Jul 06, 2015 at 06:03:21AM +0100, Pratyush Anand wrote: >> Add all function symbols which are called from do_debug_exception under >> NOKPROBE_SYMBOL, as they can not kprobed. > > It's a shame this has to be so manual, but I suppose it's done on a > best-effort basis to catch broken probe placement.
Ah, yes. You can use kprobe-tracer in ftrace by feeding all symbols to them and enabling it (and pray). > If we miss a function and somebody probes it, do we just get stuck in a > recursive exception, or could we print something suggesting that a symbol > be annotated as NOKPROBE? For some cases we can detect recursion, but usually, it may reset itself or infinite recursion loop before detecting it. :( Thank you, -- Masami HIRAMATSU Linux Technology Research Center, System Productivity Research Dept. Center for Technology Innovation - Systems Engineering Hitachi, Ltd., Research & Development Group E-mail: [email protected] -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
