Messages in this thread | | | Date | Mon, 18 Sep 2006 17:11:00 +0200 | From | Ingo Molnar <> | Subject | Re: LTTng and SystemTAP (Everyone who is scared to read this huge thread, skip to here) |
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* Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:
> > Some of the extensive hooking you do in LTT could be aleviated to a > > great degree if you used dynamic probes. For example the syscall > > entry hackery in LTT looks truly scary. > > Yes, agreed. The last time I checked, I thought about moving this > tracing code to the syscall_trace_entry/exit (used for security hooks > and ptrace if I remember well). I just didn't have the time to do it > yet.
correct, that's where all such things (auditing, seccomp, ptrace, sigstop, freezing, etc.) hook into. Much (all?) of the current entry.S hacks can go away in favor of a much easier .c patch to do_syscall_trace() and this would reduce a significantion portion of the present intrusiveness of LTTng.
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