Messages in this thread | | | Date | Mon, 14 Feb 2011 16:19:28 +0100 | From | Tejun Heo <> | Subject | Re: [PATCH 1/1] ptrace: make sure do_wait() won't hang after PTRACE_ATTACH |
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Hello,
On Mon, Feb 14, 2011 at 04:06:56PM +0100, Oleg Nesterov wrote: > This was (very briefly) discussed recently. Probably we can implement > PTRACE_DETACH_RUNNING (the name is random) which doesn't require the > stopped tracee but ignores the "data" argument.
I think the root problem is not how ptrace detaches but how ptrace attaches and stops tracee. If we have a clean way to seize the tracee, how we detach doesn't really matter. For example, a new ptrace call which stops the tracee and puts it in a ptrace command ready state without messing with the signal and group stop stuff.
Thanks.
-- tejun
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